/* roulang page: index */
:root{
  --ice:#12A8C4;
  --ice-deep:#0B7A90;
  --orange:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --soft:#F3F8FA;
  --bg:#F6FAFB;
  --white:#FFFFFF;
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-img:14px;
  --sh-card:0 1px 2px rgba(14,23,32,.05), 0 8px 24px rgba(14,23,32,.06);
  --sh-hover:0 16px 40px rgba(18,168,196,.18);
  --grad-brand:linear-gradient(135deg,#0B7A90 0%,#12A8C4 52%,#66DCC0 100%);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;font-family:var(--font);font-size:16.5px;line-height:1.85;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:var(--ice-deep);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--ice);}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input,textarea,select{font-family:inherit;font-size:16px;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{font-size:34px;line-height:1.25;margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:16px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--ice-deep);background:#E8F6F9;padding:6px 12px;border-radius:999px;margin-bottom:16px;text-transform:uppercase;}
.eyebrow.on-dark{color:#BFF0F8;background:rgba(255,255,255,.10);}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15.5px;font-weight:600;line-height:1;border-radius:999px;padding:16px 30px;transition:transform .2s ease,box-shadow .24s ease,background .24s ease,color .2s ease,border-color .2s ease;white-space:nowrap;}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--grad-brand);background-size:160% 160%;background-position:0% 50%;color:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 10px 24px rgba(18,168,196,.28);}
.btn-primary:hover{color:#fff;background-position:100% 50%;filter:brightness(1.06);box-shadow:inset 0 1px 0 rgba(255,255,255,.32),0 0 0 2px rgba(18,168,196,.28),0 14px 30px rgba(18,168,196,.30);}
.btn-outline-light{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.62);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.20);color:#fff;border-color:#fff;}
.btn-outline{background:#fff;border:1px solid var(--ice);color:var(--ice-deep);}
.btn-outline:hover{background:#EAF7FA;color:var(--ice-deep);}
.btn-sm{padding:12px 22px;font-size:14.5px;}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ice-deep);font-size:15px;}
.link-arrow::after{content:"→";transition:transform .22s ease;display:inline-block;}
.link-arrow:hover::after{transform:translateX(4px);}
.link-arrow:hover{text-decoration:underline;text-underline-offset:5px;}

/* ---------- Header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:120;height:76px;background:rgba(255,255,255,.14);-webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid rgba(255,255,255,.28);box-shadow:0 6px 24px rgba(11,40,52,.12);color:#fff;transition:height .24s ease,background .24s ease,color .24s ease,box-shadow .24s ease,border-color .24s ease;}
.site-header.is-scrolled{height:64px;background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:0 8px 28px rgba(14,23,32,.10);color:var(--ink);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:100%;}
.logo{display:inline-flex;align-items:center;gap:10px;color:inherit;}
.logo:hover{color:inherit;}
.logo-mark{width:36px;height:36px;flex:0 0 auto;color:currentColor;}
.logo-text{display:flex;flex-direction:column;line-height:1.05;}
.logo-text strong{font-size:19px;font-weight:800;letter-spacing:.02em;}
.logo-text em{font-style:normal;font-size:11px;letter-spacing:.30em;opacity:.72;font-weight:600;}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{position:relative;display:inline-block;padding:10px 13px;font-size:15px;font-weight:600;color:inherit;opacity:.94;border-radius:10px;transition:opacity .2s ease,background .2s ease;}
.main-nav a::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;border-radius:2px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .24s ease;}
.main-nav a:hover{opacity:1;background:rgba(255,255,255,.12);}
.site-header.is-scrolled .main-nav a:hover{background:var(--soft);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{opacity:1;}
.header-actions{display:flex;align-items:center;gap:12px;}
.header-actions .btn{padding:12px 22px;font-size:14.5px;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,.42);background:rgba(255,255,255,.12);position:relative;}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:var(--soft);}
.nav-toggle span{position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:currentColor;transition:transform .24s ease,opacity .2s ease;}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;min-height:640px;display:flex;align-items:center;padding:158px 0 92px;color:#fff;background:var(--grad-brand);}
.hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.9;}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,40,52,.62),rgba(11,40,52,.50) 55%,rgba(11,40,52,.36));}
.hero-inner{position:relative;z-index:2;max-width:660px;}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.12em;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.34);margin-bottom:22px;}
.hero-kicker b{color:#FFD9CB;font-weight:800;}
.hero h1{font-size:54px;line-height:1.15;font-weight:800;letter-spacing:-.5px;color:#fff;margin-bottom:20px;}
.hero-sub{font-size:18px;line-height:1.7;color:rgba(255,255,255,.88);max-width:600px;margin-bottom:34px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:52px;}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.hero-stat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);border-radius:var(--r-sm);padding:16px 18px;}
.hero-stat strong{display:block;font-size:28px;font-weight:800;font-variant-numeric:tabular-nums;color:#fff;line-height:1.1;}
.hero-stat span{font-size:12.5px;color:rgba(255,255,255,.78);letter-spacing:.02em;}

/* ---------- Anchor bar ---------- */
.anchor-bar{position:sticky;top:64px;z-index:90;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 6px 20px rgba(14,23,32,.05);}
.anchor-inner{display:flex;gap:6px;overflow-x:auto;padding:8px 32px;scrollbar-width:none;}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-inner a{position:relative;flex:0 0 auto;padding:12px 16px;font-size:14.5px;font-weight:600;color:var(--muted);border-radius:10px;transition:color .2s ease,background .2s ease;}
.anchor-inner a::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;border-radius:2px;background:var(--ice);transform:scaleX(0);transform-origin:left;transition:transform .24s ease;}
.anchor-inner a:hover{color:var(--ice-deep);background:var(--soft);}
.anchor-inner a.is-active{color:var(--ice-deep);}
.anchor-inner a.is-active::after{transform:scaleX(1);}

/* ---------- Sections ---------- */
section[id]{scroll-margin-top:142px;}
.bg-soft{background:#EFF7FA;}
.bg-dark{background:var(--ink);color:rgba(255,255,255,.78);}
.bg-dark h2,.bg-dark h3{color:#fff;}
.bg-white{background:#fff;}

/* Selling */
.sell-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.sell-item{display:grid;grid-template-columns:96px 1fr;gap:20px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 26px 24px;box-shadow:var(--sh-card);transition:transform .24s ease,box-shadow .24s ease;}
.sell-item:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.sell-item:nth-child(even){margin-top:28px;}
.sell-num{width:96px;height:96px;border-radius:14px;background:#E8F6F9;border:1px solid rgba(18,168,196,.28);display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;color:var(--ice-deep);font-variant-numeric:tabular-nums;}
.sell-item h3{font-size:20px;margin-bottom:10px;}
.sell-item p{font-size:15px;color:var(--muted);line-height:1.8;}
.section-tail{margin-top:34px;}

/* Demo */
.demo-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;}
.demo-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card);background:var(--grad-brand);}
.demo-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
.demo-tag{position:absolute;left:18px;top:18px;background:rgba(255,255,255,.94);color:var(--ice-deep);font-size:12.5px;font-weight:700;padding:6px 12px;border-radius:999px;}
.demo-steps{display:flex;flex-direction:column;gap:22px;}
.demo-step{display:grid;grid-template-columns:56px 1fr;gap:16px;}
.demo-step span{width:56px;height:56px;border-radius:50%;background:#fff;border:1px solid rgba(18,168,196,.32);color:var(--ice-deep);font-weight:800;font-size:17px;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;}
.demo-step h3{font-size:18px;margin-bottom:6px;}
.demo-step p{font-size:14.8px;color:var(--muted);line-height:1.8;}

/* Proof */
.proof-badges{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:40px;}
.proof-badge{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:var(--r-md);padding:24px 20px;}
.proof-badge strong{display:block;font-size:30px;font-weight:800;color:var(--mint);font-variant-numeric:tabular-nums;line-height:1.1;margin-bottom:8px;}
.proof-badge b{display:block;font-size:14.5px;color:#fff;font-weight:600;margin-bottom:4px;}
.proof-badge span{font-size:12.5px;color:rgba(255,255,255,.62);}
.proof-cases{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.proof-case{display:grid;grid-template-columns:150px 1fr;gap:20px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);border-radius:var(--r-md);padding:18px;transition:border-color .24s ease,background .24s ease;}
.proof-case:hover{border-color:rgba(102,220,192,.55);background:rgba(255,255,255,.08);}
.proof-case img{border-radius:12px;aspect-ratio:4/3;object-fit:cover;width:100%;height:100%;}
.proof-case h3{font-size:17px;margin-bottom:8px;}
.proof-case p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.75;}
.quote{margin-top:40px;border-left:3px solid var(--ice);background:rgba(255,255,255,.06);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:22px 26px;font-size:15.5px;color:rgba(255,255,255,.82);}

/* Price */
.price-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px;align-items:stretch;}
.price-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;box-shadow:var(--sh-card);display:flex;flex-direction:column;transition:transform .24s ease,box-shadow .24s ease;}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.price-card.featured{border:2px solid var(--ice);background:linear-gradient(180deg,#F4FCFE 0%,#FFFFFF 46%);box-shadow:0 1px 2px rgba(14,23,32,.05),0 18px 44px rgba(18,168,196,.18);}
.price-flag{position:absolute;right:22px;top:-14px;background:var(--orange);color:#fff;font-size:12.5px;font-weight:700;padding:6px 14px;border-radius:999px;letter-spacing:.04em;}
.price-card h3{font-size:20px;margin-bottom:8px;}
.price-note{font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.price-amount{display:flex;align-items:baseline;gap:8px;margin-bottom:22px;}
.price-amount strong{font-size:36px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.5px;}
.price-amount span{font-size:13.5px;color:var(--muted);}
.price-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;}
.price-list li{position:relative;padding-left:24px;font-size:14.8px;color:var(--text);line-height:1.7;}
.price-list li::before{content:"";position:absolute;left:4px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--ice);}
.price-card .btn{margin-top:auto;}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-card);transition:transform .28s ease,box-shadow .28s ease;display:flex;flex-direction:column;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.news-thumb{position:relative;display:block;overflow:hidden;background:var(--grad-brand);aspect-ratio:16/10;}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-tag{position:absolute;left:14px;top:14px;background:#E8F6F9;color:var(--ice-deep);font-size:12px;font-weight:700;padding:5px 11px;border-radius:8px;}
.news-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:17.5px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a{color:inherit;}
.news-body h3 a:hover{color:var(--ice-deep);}
.news-desc{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);}
.news-meta time{font-variant-numeric:tabular-nums;}
.news-empty{grid-column:1/-1;background:#fff;border:1px dashed rgba(18,168,196,.42);border-radius:var(--r-lg);padding:56px 26px;text-align:center;color:var(--muted);}
.news-empty svg{width:54px;height:54px;color:var(--ice);margin:0 auto 16px;}
.news-empty p{font-size:15.5px;margin-bottom:18px;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item[open]{border-color:rgba(18,168,196,.45);box-shadow:0 1px 2px rgba(14,23,32,.04),0 10px 26px rgba(18,168,196,.10);}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:56px;padding:16px 24px;cursor:pointer;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid rgba(18,168,196,.45);position:relative;transition:transform .22s ease,background .22s ease;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ice-deep);border-radius:2px;transform:translate(-50%,-50%);}
.faq-icon::before{width:11px;height:2px;}
.faq-icon::after{width:2px;height:11px;transition:opacity .22s ease;}
.faq-item[open] .faq-icon{transform:rotate(180deg);background:#E8F6F9;}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-body{padding:0 24px 22px;background:#F7FBFC;box-shadow:inset 0 1px 0 rgba(18,168,196,.16);}
.faq-body p{font-size:15px;color:var(--muted);line-height:1.85;padding-top:18px;}

/* Final CTA */
.final{position:relative;overflow:hidden;color:#fff;background:var(--grad-brand);padding:92px 0;}
.final::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.42;}
.final::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,40,52,.70),rgba(11,40,52,.48));}
.final-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.final h2{font-size:34px;color:#fff;margin-bottom:16px;}
.final-copy p{color:rgba(255,255,255,.86);font-size:16px;margin-bottom:22px;}
.final-points{display:flex;flex-direction:column;gap:12px;}
.final-points li{position:relative;padding-left:26px;font-size:15px;color:rgba(255,255,255,.88);}
.final-points li::before{content:"";position:absolute;left:2px;top:10px;width:9px;height:9px;border-radius:50%;background:var(--mint);}
.form-card{background:#fff;border-radius:var(--r-lg);padding:32px 30px;box-shadow:0 24px 60px rgba(11,40,52,.28);color:var(--text);}
.form-card h3{font-size:20px;margin-bottom:6px;}
.form-card .form-hint{font-size:13.5px;color:var(--muted);margin-bottom:22px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:7px;font-weight:600;}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:var(--r-sm);padding:13px 15px;background:#FCFEFE;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.field input{height:48px;}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--ice);background:#fff;box-shadow:0 0 0 3px rgba(18,168,196,.16);}
.field input:focus-visible,.field textarea:focus-visible{outline:none;}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.7;}
.form-alert{display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r-sm);font-size:13.5px;background:#E7F8F2;color:#0B6B52;border:1px solid rgba(11,107,82,.22);}
.form-alert.show{display:block;}

/* Footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);position:relative;padding:0 0 26px;}
.site-footer::before{content:"";display:block;height:3px;background:var(--grad-brand);}
.footer-top{padding:64px 0 44px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-col a:hover{color:#fff;}
.footer-col address{font-style:normal;font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.72);}
.footer-col address strong{display:block;color:#fff;font-weight:600;margin-bottom:6px;font-size:14.5px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);}

/* Float CTA & back to top */
.float-cta{position:fixed;right:26px;bottom:28px;z-index:110;display:flex;flex-direction:column;align-items:flex-end;gap:12px;}
.float-btn{display:inline-flex;align-items:center;gap:9px;padding:15px 24px;border-radius:999px;background:var(--grad-brand);color:#fff;font-size:15px;font-weight:700;box-shadow:0 14px 34px rgba(18,168,196,.38);transition:transform .2s ease,box-shadow .24s ease;}
.float-btn:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 42px rgba(18,168,196,.46);}
.float-btn .dot{width:9px;height:9px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(102,220,192,.28);}
.float-panel{display:none;width:250px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:0 20px 48px rgba(14,23,32,.18);padding:20px;}
.float-panel.open{display:block;}
.float-panel p{font-size:14px;color:var(--muted);margin-bottom:14px;}
.float-panel .btn{width:100%;margin-bottom:12px;}
.to-top{position:fixed;right:26px;bottom:104px;z-index:105;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--ice-deep);box-shadow:0 10px 26px rgba(14,23,32,.12);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s ease,transform .24s ease,visibility .24s ease;}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:#EAF7FA;}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 26px;}
  .hero h1{font-size:46px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .sell-item:nth-child(even){margin-top:0;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .hero{padding:140px 0 76px;min-height:560px;}
  .hero h1{font-size:40px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .sell-grid{grid-template-columns:1fr;}
  .demo-wrap{grid-template-columns:1fr;gap:32px;}
  .proof-badges{grid-template-columns:repeat(2,1fr);}
  .proof-cases{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto;}
  .price-card.featured{order:-1;}
  .final-inner{grid-template-columns:1fr;gap:36px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px;}
  .main-nav{position:fixed;left:0;right:0;top:64px;bottom:0;background:rgba(255,255,255,.97);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);flex-direction:column;align-items:stretch;gap:2px;padding:22px 22px 40px;overflow-y:auto;transform:translateY(-10px);opacity:0;visibility:hidden;transition:transform .24s ease,opacity .24s ease,visibility .24s ease;}
  body.nav-open .main-nav{transform:translateY(0);opacity:1;visibility:visible;}
  .main-nav a{color:var(--ink);font-size:17px;padding:16px 14px;border-radius:12px;border-bottom:1px solid var(--line);}
  .main-nav a::after{display:none;}
  .main-nav a.active{color:var(--ice-deep);background:#EAF7FA;}
  .nav-toggle{display:block;}
  .header-actions .btn{display:none;}
  .anchor-bar{top:64px;}
  .anchor-inner{padding:8px 24px;}
  section[id]{scroll-margin-top:136px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .site-header{height:64px;}
  .logo-text strong{font-size:17px;}
  .logo-mark{width:30px;height:30px;}
  .hero{padding:118px 0 56px;min-height:520px;}
  .hero h1{font-size:30px;line-height:1.24;letter-spacing:-.2px;}
  .hero-sub{font-size:15.5px;}
  .hero-btns{flex-direction:column;align-items:stretch;}
  .hero-btns .btn{width:100%;}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:10px;}
  .hero-stat{padding:13px 14px;}
  .hero-stat strong{font-size:23px;}
  .section-head h2{font-size:24px;}
  .section-head{margin-bottom:30px;}
  .sell-item{grid-template-columns:1fr;gap:14px;padding:22px 20px;}
  .sell-num{width:64px;height:64px;font-size:20px;border-radius:12px;}
  .demo-step{grid-template-columns:44px 1fr;gap:13px;}
  .demo-step span{width:44px;height:44px;font-size:15px;}
  .proof-badges{grid-template-columns:1fr 1fr;gap:12px;}
  .proof-badge{padding:18px 16px;}
  .proof-badge strong{font-size:24px;}
  .proof-case{grid-template-columns:1fr;gap:14px;}
  .price-card{padding:26px 22px;}
  .news-grid{grid-template-columns:1fr;}
  .faq-item summary{padding:15px 18px;}
  .faq-item summary h3{font-size:15.8px;}
  .faq-body{padding:0 18px 20px;}
  .final{padding:56px 0 76px;}
  .final h2{font-size:26px;}
  .form-card{padding:24px 20px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .float-cta{left:0;right:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--line);flex-direction:row;align-items:center;justify-content:space-between;opacity:0;transform:translateY(16px);visibility:hidden;transition:opacity .24s ease,transform .24s ease,visibility .24s ease;}
  .float-cta.show{opacity:1;transform:translateY(0);visibility:visible;}
  .float-btn{width:100%;justify-content:center;padding:14px 20px;font-size:15px;}
  .float-panel{position:fixed;left:16px;right:16px;bottom:78px;width:auto;}
  .to-top{right:16px;bottom:86px;width:42px;height:42px;}
  .site-footer{padding-bottom:88px;}
}
@media (max-width:519px){
  .hero h1{font-size:27px;}
  .hero-stats{grid-template-columns:1fr 1fr;}
  .proof-badges{grid-template-columns:1fr;}
  .anchor-inner a{font-size:13.5px;padding:10px 12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root{
  --c-primary:#12A8C4;
  --c-primary-deep:#0B7A90;
  --c-accent:#FF5C2B;
  --c-mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --ice:#F3F8FA;
  --ice-2:#E8F6F9;
  --page:#F6FAFB;
  --white:#FFFFFF;
  --radius-xl:26px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow-card:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --shadow-hover:0 16px 40px rgba(18,168,196,.18);
  --shadow-soft:0 6px 24px rgba(11,40,52,.12);
  --grad-brand:linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --header-h:76px;
}
/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-deep);}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
input,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15.5px;
  font-weight:600;
  letter-spacing:.2px;
  line-height:1;
  white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(120deg,#0B7A90 0%,#12A8C4 60%,#3FC8DC 100%);
  box-shadow:0 8px 20px rgba(18,168,196,.28),inset 0 1px 0 rgba(255,255,255,.24);
}
.btn-primary:hover{
  color:#fff;
  background:linear-gradient(240deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%);
  box-shadow:0 12px 28px rgba(18,168,196,.34),0 0 0 2px rgba(18,168,196,.22),inset 0 1px 0 rgba(255,255,255,.3);
  transform:translateY(-2px);
}
.btn-primary:active{transform:scale(.98);}
.btn-outline-light{
  color:#fff;
  background:rgba(255,255,255,.1);
  border-color:rgba(255,255,255,.52);
  backdrop-filter:blur(6px);
}
.btn-outline-light:hover{color:#0B2A34;background:#fff;border-color:#fff;}
.btn-ghost{
  color:var(--c-primary-deep);
  background:#fff;
  border-color:var(--c-primary);
}
.btn-ghost:hover{background:var(--ice-2);color:var(--c-primary-deep);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* ===== 导航 ===== */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:120;
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 6px 24px rgba(11,40,52,.12);
  transition:background .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--header-h);
  transition:height .24s ease;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:700;
  flex:0 0 auto;
}
.logo:hover{color:#fff;}
.logo-mark{width:34px;height:34px;flex:0 0 auto;}
.logo-text{display:flex;flex-direction:column;line-height:1.05;}
.logo-text strong{font-size:17px;font-weight:800;letter-spacing:.5px;}
.logo-text em{font-style:normal;font-size:11px;letter-spacing:2.4px;opacity:.82;font-weight:600;}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.main-nav a{
  position:relative;
  padding:9px 12px;
  color:rgba(255,255,255,.92);
  font-size:15px;
  font-weight:600;
  border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.12);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{color:#fff;}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  padding:0;
  border:1px solid rgba(255,255,255,.42);
  border-radius:12px;
  background:rgba(255,255,255,.12);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:#fff;
  transition:background .2s ease,transform .24s ease,opacity .2s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--line);
  box-shadow:0 8px 28px rgba(11,40,52,.1);
}
.site-header.is-scrolled .header-inner{height:64px;}
.site-header.is-scrolled .logo,
.site-header.is-scrolled .main-nav a{color:var(--ink);}
.site-header.is-scrolled .main-nav a:hover{color:var(--c-primary-deep);background:var(--ice-2);}
.site-header.is-scrolled .main-nav a.active{color:var(--c-primary-deep);}
.site-header.is-scrolled .btn-outline-light{
  color:var(--c-primary-deep);
  background:#fff;
  border-color:rgba(18,168,196,.45);
}
.site-header.is-scrolled .btn-outline-light:hover{background:var(--ice-2);}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:#fff;}
.site-header.is-scrolled .nav-toggle span{background:var(--ink);}

/* ===== 顶部横幅 ===== */
.page-hero{
  position:relative;
  padding:140px 0 118px;
  color:#fff;
  background:
    linear-gradient(135deg,rgba(11,40,52,.82) 0%,rgba(11,122,144,.66) 52%,rgba(18,168,196,.46) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.5;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  line-height:1.6;
  color:rgba(255,255,255,.82);
}
.breadcrumb a{color:rgba(255,255,255,.92);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{
  color:rgba(255,255,255,.72);
  max-width:520px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.hero-note{
  margin-top:18px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 16px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:600;
  color:#fff;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.3);
}
.hero-note::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--c-mint);
  box-shadow:0 0 0 4px rgba(102,220,192,.22);
}

/* ===== 文章主体 ===== */
.article-main{padding:0 0 96px;margin-top:-76px;position:relative;z-index:5;}
.article-shell{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  box-shadow:0 20px 56px rgba(11,40,52,.1);
  padding:52px 56px 56px;
}
.article-head{max-width:820px;}
.article-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:8px;
  font-size:13px;
  font-weight:700;
  color:var(--c-primary-deep);
  background:var(--ice-2);
  border:1px solid rgba(18,168,196,.28);
  letter-spacing:.4px;
}
.article-title{
  margin-top:18px;
  font-size:40px;
  line-height:1.28;
  font-weight:800;
  letter-spacing:-.4px;
  color:var(--ink);
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  margin-top:22px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line);
  font-size:13.5px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px;}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--c-primary);opacity:.6;}
.article-meta strong{color:var(--text);font-weight:600;}
.article-cover{
  margin:24px 0 0;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--ice);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ===== 正文排版 ===== */
.article-body{
  max-width:800px;
  margin:0 auto;
  padding-top:34px;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  margin:40px 0 16px;
  font-size:24px;
  line-height:1.5;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.2px;
}
.article-body h3{
  margin:28px 0 12px;
  font-size:20px;
  line-height:1.6;
  font-weight:600;
  color:var(--ink);
}
.article-body p{margin:0 0 20px;}
.article-body a{color:var(--c-primary-deep);text-decoration:underline;text-underline-offset:3px;}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--c-primary);
  border-radius:0 12px 12px 0;
  background:var(--ice);
  color:var(--text);
}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:0;}
.article-body ul li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--c-primary);
}
.article-body ol{counter-reset:li;padding-left:0;}
.article-body ol li{
  position:relative;
  padding-left:30px;
  margin-bottom:10px;
  counter-increment:li;
}
.article-body ol li::before{
  content:counter(li);
  position:absolute;
  left:0;top:.28em;
  width:20px;height:20px;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:#fff;
  background:var(--c-primary-deep);
  border-radius:6px;
}
.article-body img{
  border-radius:14px;
  border:1px solid var(--line);
  margin:26px 0;
  width:100%;
}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13.5px;color:var(--muted);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  min-width:520px;
}
.article-body .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--ice);}
.article-body th,.article-body td{
  padding:12px 16px;
  text-align:left;
  border-bottom:1px solid var(--line);
}
.article-body thead th{background:var(--ice-2);color:var(--ink);font-weight:700;}
.article-body tbody tr:last-child td{border-bottom:0;}

/* ===== 文末标签 / 返回 ===== */
.article-foot{
  max-width:800px;
  margin:36px auto 0;
  padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag-list a{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary-deep);
  background:var(--ice-2);
  border:1px solid rgba(18,168,196,.22);
  transition:background .2s ease,transform .2s ease;
}
.tag-list a:hover{background:#dff2f7;transform:translateY(-1px);}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14.5px;
  font-weight:600;
  color:var(--c-primary-deep);
}
.back-link svg{width:15px;height:15px;transition:transform .22s ease;}
.back-link:hover svg{transform:translateX(-4px);}

/* ===== 空态 ===== */
.empty-state{
  max-width:640px;
  margin:40px auto;
  padding:56px 32px;
  text-align:center;
  background:var(--ice);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
}
.empty-state svg{width:52px;height:52px;margin:0 auto 18px;color:var(--c-primary);}
.empty-state h2{font-size:22px;color:var(--ink);font-weight:700;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:22px;}

/* ===== 相关推荐 ===== */
.related{padding:12px 0 96px;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.3px;
}
.section-head p{font-size:14.5px;color:var(--muted);}
.section-head .text-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--c-primary-deep);
}
.section-head .text-cta svg{width:15px;height:15px;transition:transform .22s ease;}
.section-head .text-cta:hover svg{transform:translateX(4px);}
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.post-card{
  display:flex;
  flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  color:inherit;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.post-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(18,168,196,.34);
  color:inherit;
}
.post-thumb{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--grad-brand);
}
.post-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1;}
.post-tag{
  align-self:flex-start;
  padding:4px 11px;
  border-radius:8px;
  font-size:12px;
  font-weight:700;
  color:var(--c-primary-deep);
  background:var(--ice-2);
  margin-bottom:12px;
}
.post-body h3{
  font-size:18px;
  line-height:1.55;
  font-weight:600;
  color:var(--ink);
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-body p{
  font-size:14.5px;
  line-height:1.75;
  color:var(--muted);
  margin-bottom:16px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-more{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--c-primary-deep);
}
.post-more svg{width:14px;height:14px;transition:transform .22s ease;}
.post-card:hover .post-more svg{transform:translateX(4px);}

/* ===== 底部转化条 ===== */
.cta-band{
  position:relative;
  padding:56px 60px;
  border-radius:var(--radius-xl);
  color:#fff;
  overflow:hidden;
  background:
    linear-gradient(135deg,rgba(11,40,52,.9) 0%,rgba(11,122,144,.82) 55%,rgba(18,168,196,.72) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  box-shadow:0 20px 50px rgba(11,40,52,.2);
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-90px;top:-90px;
  width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(102,220,192,.4),transparent 68%);
}
.cta-band-inner{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.cta-band h2{font-size:30px;line-height:1.34;font-weight:800;letter-spacing:-.3px;}
.cta-band p{margin-top:12px;font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.86);max-width:620px;}
.cta-band-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  margin-top:96px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,#0B7A90,#12A8C4,#66DCC0);
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:44px;
  padding-bottom:48px;
}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.66);max-width:320px;}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.3px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-col address{
  font-style:normal;
  font-size:14.5px;
  line-height:2;
  color:rgba(255,255,255,.72);
}
.footer-col address strong{display:block;color:#fff;font-weight:600;margin-bottom:4px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding:22px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;
  color:rgba(255,255,255,.56);
  font-variant-numeric:tabular-nums;
}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;
  right:26px;
  bottom:26px;
  z-index:110;
  width:48px;height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(18,168,196,.3);
  border-radius:50%;
  background:#fff;
  color:var(--c-primary-deep);
  box-shadow:0 10px 26px rgba(11,40,52,.16);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--ice-2);}
.to-top svg{width:18px;height:18px;}

/* ===== 响应式 1024 ===== */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .main-nav{
    position:fixed;
    inset:0;
    margin:0;
    padding:96px 24px 32px;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    transform:translateX(102%);
    transition:transform .3s ease;
    overflow-y:auto;
    z-index:115;
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .main-nav a{
    color:var(--ink);
    font-size:17px;
    padding:15px 6px;
    border-bottom:1px solid var(--line);
    border-radius:0;
  }
  .main-nav a:hover,.main-nav a.active{color:var(--c-primary-deep);background:transparent;}
  .main-nav a::after{display:none;}
  .nav-toggle{display:flex;position:relative;z-index:125;}
  body.nav-open .nav-toggle span{background:var(--ink);}
  body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
  body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  body.nav-open .site-header{background:rgba(255,255,255,.96);border-bottom-color:var(--line);}
  body.nav-open .site-header .logo{color:var(--ink);}
  .header-actions .btn-outline-light{display:none;}
  .page-hero{padding:124px 0 104px;}
  .article-shell{padding:42px 34px 44px;}
  .article-title{font-size:34px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-top{grid-template-columns:1fr 1fr;gap:34px;}
  .cta-band{padding:44px 38px;}
  .cta-band h2{font-size:26px;}
}

/* ===== 响应式 767 ===== */
@media (max-width:767px){
  body{font-size:16px;line-height:1.8;}
  .container{padding:0 18px;}
  .header-inner{height:64px;gap:14px;}
  .logo-text strong{font-size:15.5px;}
  .logo-text em{font-size:10px;letter-spacing:1.8px;}
  .logo-mark{width:30px;height:30px;}
  .page-hero{padding:104px 0 92px;}
  .hero-note{font-size:12.5px;padding:6px 13px;}
  .article-main{margin-top:-56px;padding-bottom:64px;}
  .article-shell{padding:28px 20px 32px;border-radius:var(--radius-lg);}
  .article-title{font-size:26px;line-height:1.34;letter-spacing:-.2px;}
  .article-tag{font-size:12px;padding:5px 12px;}
  .article-meta{font-size:12.5px;gap:8px 14px;padding-bottom:20px;}
  .article-cover{margin-top:20px;}
  .article-body{padding-top:26px;font-size:16px;line-height:1.88;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .article-body p{margin-bottom:18px;}
  .article-foot{flex-direction:column;align-items:flex-start;gap:18px;}
  .related{padding-bottom:64px;}
  .section-head h2{font-size:23px;}
  .card-grid{grid-template-columns:1fr;gap:18px;}
  .cta-band{padding:34px 22px;border-radius:var(--radius-lg);}
  .cta-band h2{font-size:22px;}
  .cta-band p{font-size:14.5px;}
  .cta-band-actions .btn{width:100%;}
  .site-footer{margin-top:64px;padding-top:56px;}
  .footer-top{grid-template-columns:1fr;gap:30px;padding-bottom:34px;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;font-size:12.5px;text-align:left;}
  .to-top{right:16px;bottom:18px;width:44px;height:44px;}
  .empty-state{padding:40px 20px;}
  .empty-state h2{font-size:19px;}
}

/* ===== 响应式 520 ===== */
@media (max-width:520px){
  .article-title{font-size:23px;}
  .article-shell{padding:24px 16px 26px;}
  .breadcrumb{font-size:12.5px;}
  .breadcrumb .current{max-width:180px;}
  .post-body{padding:18px 18px 20px;}
  .btn{height:46px;font-size:14.5px;padding:0 20px;}
}

/* roulang page: category1 */
:root{
  --brand:#12A8C4;
  --brand-dark:#0B7A90;
  --accent:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --soft:#F3F8FA;
  --ice:#E8F6F9;
  --page:#F6FAFB;
  --white:#FFFFFF;
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --shadow-2:0 16px 40px rgba(18,168,196,.18);
  --grad:linear-gradient(135deg,#0B7A90 0%,#12A8C4 52%,#66DCC0 100%);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.3px}
p{margin:0}
ul,ol{margin:0}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  height:76px;display:flex;align-items:center;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 6px 24px rgba(11,40,52,.12);
  transition:background .24s ease,height .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.header-inner{display:flex;align-items:center;gap:24px;height:100%}
.logo{display:flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.logo:hover{color:#fff}
.logo-mark{width:34px;height:34px;flex:0 0 auto}
.logo-text{display:flex;align-items:baseline;gap:7px;line-height:1;white-space:nowrap}
.logo-text strong{font-size:19px;font-weight:800;letter-spacing:.5px}
.logo-text em{font-style:normal;font-size:12.5px;letter-spacing:1.6px;opacity:.82}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.main-nav a{
  position:relative;display:inline-block;
  color:rgba(255,255,255,.9);
  font-size:15px;font-weight:600;
  padding:9px 12px;border-radius:10px;
  transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:currentColor;border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .24s ease;
}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a:hover,.main-nav a.active{color:#fff}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn-outline-light{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 18px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;
  color:#fff;border:1px solid rgba(255,255,255,.72);
  background:rgba(255,255,255,.06);
  transition:background .22s ease,border-color .22s ease,color .22s ease,transform .2s ease;
}
.btn-outline-light:hover{background:rgba(255,255,255,.2);color:#fff;border-color:#fff}
.btn-outline-light:active{transform:scale(.98)}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.5);
  border-radius:12px;background:rgba(255,255,255,.08);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .24s ease,opacity .24s ease,background .24s ease}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);height:64px;
  border-bottom-color:var(--line);
  box-shadow:0 8px 28px rgba(14,23,32,.12);
}
.site-header.is-scrolled .logo{color:var(--ink)}
.site-header.is-scrolled .main-nav a{color:var(--text)}
.site-header.is-scrolled .main-nav a.active{color:var(--brand)}
.site-header.is-scrolled .btn-outline-light{border-color:var(--brand);color:var(--brand);background:transparent}
.site-header.is-scrolled .btn-outline-light:hover{background:#EAF7FA;color:var(--brand-dark)}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:var(--soft)}
.site-header.is-scrolled .nav-toggle span{background:var(--ink)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:152px 0 76px;
  color:#fff;
  background-image:
    linear-gradient(135deg,rgba(11,40,52,.82) 0%,rgba(11,122,144,.68) 52%,rgba(102,220,192,.42) 100%),
    url(/assets/images/backpic/back-1.webp);
  background-position:center;
  background-size:cover;
  background-repeat:no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.055) 0 1px,transparent 1px 26px);
  opacity:.9;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:20px;
}
.breadcrumb a{color:rgba(255,255,255,.88)}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:rgba(255,255,255,.72)}
.page-hero h1{
  color:#fff;
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.15;
  font-weight:800;
  max-width:820px;
  letter-spacing:-.8px;
}
.hero-lead{
  margin-top:18px;
  font-size:17.5px;
  line-height:1.75;
  color:rgba(255,255,255,.88);
  max-width:620px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags span{
  display:inline-flex;align-items:center;
  padding:7px 15px;border-radius:var(--r-pill);
  font-size:13.5px;font-weight:600;
  color:#fff;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.34);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}

/* ---------- section base ---------- */
.section{padding:96px 0}
.section--soft{background:var(--soft)}
.section--dark{background:var(--ink);color:#fff}
.section--dark h2,.section--dark h3{color:#fff}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.25;font-weight:700;margin-bottom:14px;
}
.section-head p{color:var(--muted);font-size:16px}
.section--dark .section-head p{color:rgba(255,255,255,.72)}
.eyebrow{
  display:inline-block;margin-bottom:14px;
  font-size:13px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;
  color:var(--brand);
}
.section--dark .eyebrow{color:var(--mint)}

/* ---------- version cards ---------- */
.version-list{display:grid;gap:28px}
.version-card{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.18fr);
  min-height:262px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.version-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#c6e6ee}
.version-card:nth-child(even) .version-media{order:2}
.version-media{position:relative;overflow:hidden;background:var(--grad);min-height:100%}
.version-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.version-card:hover .version-media img{transform:scale(1.04)}
.version-body{
  display:flex;flex-direction:column;gap:14px;
  padding:36px 36px 32px;
}
.version-body h3{font-size:21px;font-weight:700;line-height:1.4}
.version-body > p{color:var(--muted);font-size:15.5px}
.badge-float{
  position:absolute;top:18px;right:18px;z-index:3;
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:8px;
  background:rgba(255,255,255,.96);
  border:1px solid var(--brand);
  color:var(--brand-dark);
  font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
  box-shadow:0 6px 16px rgba(18,168,196,.18);
}
.check-list{list-style:none;padding:0;display:grid;gap:8px;margin-top:2px}
.check-list li{
  position:relative;padding-left:24px;
  font-size:15px;color:var(--muted);line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:6px;top:11px;
  width:7px;height:7px;border-radius:50%;
  background:var(--brand);
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:auto;width:max-content;
  padding-top:6px;
  font-size:15.5px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.link-arrow span{transition:transform .24s ease}
.link-arrow:hover{color:var(--brand-dark);border-bottom-color:currentColor}
.link-arrow:hover span{transform:translateX(4px)}

/* ---------- stats ---------- */
.stats-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.stat{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:26px 24px;
  box-shadow:var(--shadow-1);
  transition:transform .28s ease,box-shadow .28s ease;
}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.stat strong{
  display:block;
  font-size:30px;font-weight:800;line-height:1.2;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.5px;
}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.7}
.section--dark .stat{
  background:rgba(255,255,255,.06);
  border-color:rgba(255,255,255,.16);
  box-shadow:none;
}
.section--dark .stat:hover{background:rgba(255,255,255,.1);box-shadow:none}
.section--dark .stat span{color:rgba(255,255,255,.72)}

/* ---------- steps ---------- */
.steps{display:grid;gap:0;max-width:880px}
.step{
  position:relative;
  display:grid;grid-template-columns:96px minmax(0,1fr);
  gap:26px;
  padding:30px 0;
  border-bottom:1px solid var(--line);
}
.step:last-child{border-bottom:0}
.step-num{
  font-size:44px;font-weight:800;line-height:1;
  color:transparent;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  font-variant-numeric:tabular-nums;
  letter-spacing:-2px;
}
.step h3{font-size:19px;font-weight:700;margin-bottom:8px}
.step p{color:var(--muted);font-size:15.5px}
.step-footnote{
  margin-top:34px;
  display:inline-flex;align-items:center;gap:8px;
  font-size:15.5px;font-weight:600;color:var(--brand);
}

/* ---------- quote ---------- */
.quote-block{
  margin-top:56px;
  padding:32px 36px;
  border-left:3px solid var(--brand);
  background:#fff;
  border-radius:0 var(--r-md) var(--r-md) 0;
  box-shadow:var(--shadow-1);
}
.quote-block p{font-size:16.5px;line-height:1.9;color:var(--text)}
.quote-block cite{
  display:block;margin-top:14px;font-style:normal;
  font-size:13.5px;color:var(--muted);
}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  transition:border-color .24s ease,box-shadow .24s ease;
}
.faq-item:hover{border-color:#c6e6ee}
.faq-item.is-open{box-shadow:var(--shadow-1);border-color:#b8e0ea}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:16px 22px;
  background:none;border:0;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-dark)}
.faq-item.is-open .faq-q{color:var(--brand-dark)}
.faq-icon{
  position:relative;flex:0 0 auto;
  width:22px;height:22px;border-radius:50%;
  background:var(--ice);border:1px solid #bfe6ef;
  transition:transform .24s ease,background .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.8px}
.faq-icon::after{width:1.8px;height:10px;transition:opacity .24s ease,transform .24s ease}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--brand);border-color:var(--brand)}
.faq-item.is-open .faq-icon::before{background:#fff}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s ease;
  background:#F7FBFC;
}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a > div{
  padding:16px 22px 20px;
  border-top:1px solid var(--line);
  font-size:15.5px;line-height:1.9;color:var(--muted);
}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  padding:76px 0;
  color:#fff;
  background-image:
    linear-gradient(135deg,rgba(11,122,144,.94) 0%,rgba(18,168,196,.88) 52%,rgba(102,220,192,.78) 100%),
    url(/assets/images/backpic/back-3.png);
  background-position:center;
  background-size:cover;
  overflow:hidden;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:40px;flex-wrap:wrap;
}
.cta-inner h2{
  color:#fff;font-size:clamp(22px,2.8vw,31px);
  font-weight:700;line-height:1.3;margin-bottom:12px;
}
.cta-inner p{color:rgba(255,255,255,.86);font-size:16px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:var(--r-pill);
  font-size:15.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .24s ease,background .24s ease,color .24s ease,border-color .24s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#FF7A45 0%,#FF5C2B 60%,#F04A18 100%);
  color:#fff;
  box-shadow:0 10px 24px rgba(255,92,43,.32),inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover{color:#fff;box-shadow:0 14px 30px rgba(255,92,43,.42);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  background:rgba(255,255,255,.14);
  border-color:rgba(255,255,255,.55);
  color:#fff;
}
.btn-ghost:hover{background:rgba(255,255,255,.26);color:#fff}
.btn-ghost:active{transform:scale(.98)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad);
}
.footer-top{
  display:grid;
  grid-template-columns:1.55fr 1fr 1fr 1.15fr;
  gap:44px;
  padding-bottom:46px;
}
.footer-brand .logo{color:#fff;margin-bottom:18px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{font-size:14.5px;line-height:1.95;max-width:340px;color:rgba(255,255,255,.66)}
.footer-col h4{
  color:#fff;font-size:15px;font-weight:700;
  margin-bottom:16px;letter-spacing:.2px;
}
.footer-col ul{list-style:none;padding:0;display:grid;gap:11px}
.footer-col ul a{font-size:14.5px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff}
.footer-col address{
  font-style:normal;font-size:14.5px;line-height:2;
  color:rgba(255,255,255,.72);
}
.footer-col address strong{
  display:block;color:#fff;font-weight:600;margin-bottom:6px;
}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;flex-wrap:wrap;
  padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;color:rgba(255,255,255,.55);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 28px}
  .version-body{padding:30px 28px 28px}
  .footer-top{gap:32px}
}
@media (max-width:1023px){
  .main-nav{
    position:fixed;
    top:64px;left:0;right:0;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:14px 24px 96px;
    background:rgba(255,255,255,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .3s ease;
    overflow-y:auto;
    z-index:95;
  }
  .main-nav.is-open{transform:translateX(0)}
  .main-nav a{
    color:var(--ink);font-size:17px;font-weight:600;
    padding:15px 4px;border-radius:0;
    border-bottom:1px solid var(--line);
  }
  .main-nav a::after{display:none}
  .main-nav a:hover,.main-nav a.active{color:var(--brand)}
  .nav-toggle{display:flex}
  .header-actions .btn-outline-light{display:none}
  .site-header{height:64px}
  .site-header .logo{color:#fff}
  .site-header.is-scrolled .logo{color:var(--ink)}
  .section{padding:72px 0}
  .page-hero{padding:130px 0 62px}
  .version-card{grid-template-columns:minmax(0,1fr);}
  .version-card:nth-child(even) .version-media{order:0}
  .version-media{min-height:220px;max-height:260px}
  .stats-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:52px 0}
  .page-hero{padding:118px 0 52px}
  .hero-lead{font-size:16px}
  .section-head{margin-bottom:34px}
  .version-body{padding:24px 20px 24px;gap:12px}
  .version-body h3{font-size:19px}
  .badge-float{top:12px;right:12px;font-size:12px;padding:5px 10px}
  .stats-row{grid-template-columns:1fr;gap:14px}
  .stat{padding:20px}
  .stat strong{font-size:27px}
  .step{grid-template-columns:1fr;gap:6px;padding:24px 0}
  .step-num{font-size:34px}
  .quote-block{padding:24px 20px;margin-top:36px}
  .cta-band{padding:54px 0}
  .cta-inner{gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .footer-top{grid-template-columns:1fr;gap:30px;padding-bottom:34px}
  .site-footer{padding-top:56px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .faq-q{font-size:16px;padding:14px 16px}
  .faq-a > div{padding:14px 16px 18px}
}
@media (max-width:479px){
  .logo-text em{display:none}
  .logo-text strong{font-size:18px}
  .page-hero h1{font-size:28px;letter-spacing:-.4px}
  .version-media{min-height:180px;max-height:200px}
  .btn{padding:12px 22px;font-size:15px}
}

/* roulang page: category2 */
:root{
  --brand:#12A8C4;
  --brand-dark:#0B7A90;
  --accent:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --soft:#F3F8FA;
  --page:#F6FAFB;
  --white:#FFFFFF;
  --grad:linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%);
  --grad-soft:linear-gradient(135deg,rgba(11,122,144,.10),rgba(102,220,192,.16));
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow-card:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --shadow-hover:0 16px 40px rgba(18,168,196,.18);
  --container:1200px;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  margin:0;
  color:var(--ink);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.3px;
}
p{margin:0;}
a{color:var(--brand-dark);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  height:var(--header-h);
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 6px 24px rgba(11,40,52,.12);
  transition:background .24s ease,height .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  height:64px;
  border-bottom-color:var(--line);
  box-shadow:0 8px 28px rgba(11,40,52,.10);
}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:#fff;transition:color .24s ease;}
.site-header.is-scrolled .logo{color:var(--ink);}
.logo:hover{color:#fff;}
.site-header.is-scrolled .logo:hover{color:var(--brand-dark);}
.logo-mark{width:34px;height:34px;flex:0 0 34px;}
.logo-text{display:inline-flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:17.5px;font-weight:800;letter-spacing:.5px;}
.logo-text em{font-style:normal;font-size:11.5px;letter-spacing:3px;opacity:.78;font-weight:500;}
.main-nav{display:flex;align-items:center;gap:6px;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  font-weight:600;
  color:rgba(255,255,255,.92);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.main-nav a::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.12);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{color:#fff;}
.site-header.is-scrolled .main-nav a{color:var(--text);}
.site-header.is-scrolled .main-nav a:hover{color:var(--brand-dark);background:var(--soft);}
.site-header.is-scrolled .main-nav a.active{color:var(--brand-dark);}
.header-actions{display:flex;align-items:center;gap:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;
  font-size:15.5px;font-weight:600;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .25s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98);}
.btn-primary{
  color:#fff;
  background:var(--grad);
  background-size:160% 160%;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.32),0 10px 24px rgba(18,168,196,.28);
}
.btn-primary:hover{
  color:#fff;
  background-position:100% 0;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 0 0 2px rgba(18,168,196,.22),0 14px 30px rgba(18,168,196,.32);
  transform:translateY(-1px);
}
.btn-outline-light{
  color:#fff;
  border-color:rgba(255,255,255,.62);
  background:rgba(255,255,255,.08);
  padding:10px 22px;
}
.btn-outline-light:hover{background:rgba(255,255,255,.2);color:#fff;border-color:#fff;}
.site-header.is-scrolled .btn-outline-light{color:var(--brand-dark);border-color:rgba(18,168,196,.5);background:transparent;}
.site-header.is-scrolled .btn-outline-light:hover{background:#EAF7FA;color:var(--brand-dark);border-color:var(--brand);}
.btn-secondary{
  color:var(--brand-dark);
  background:#fff;
  border-color:rgba(18,168,196,.42);
}
.btn-secondary:hover{color:var(--brand-dark);background:#EAF7FA;border-color:var(--brand);transform:translateY(-1px);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid rgba(255,255,255,.45);
  border-radius:12px;
  background:rgba(255,255,255,.10);
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:var(--soft);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:background .24s ease,transform .24s ease,opacity .24s ease;}
.site-header.is-scrolled .nav-toggle span{background:var(--ink);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:150px 0 92px;
  color:#fff;
  overflow:hidden;
  background-image:
    linear-gradient(135deg,rgba(11,40,52,.62),rgba(11,40,52,.44)),
    linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover,cover,cover;
  background-position:center,center,center;
  background-repeat:no-repeat;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(115deg,rgba(255,255,255,.055) 0 1px,transparent 1px 26px);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;
  color:rgba(255,255,255,.72);
  margin-bottom:26px;
}
.breadcrumb a{color:rgba(255,255,255,.86);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:rgba(255,255,255,.7);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;
  border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.6px;
  color:#fff;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.34);
  margin-bottom:22px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;}
.page-hero h1{
  color:#fff;
  font-size:50px;
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.5px;
  max-width:820px;
  margin-bottom:20px;
  text-shadow:0 2px 22px rgba(6,32,42,.32);
}
.page-hero .lede{
  font-size:18px;
  line-height:1.75;
  color:rgba(255,255,255,.9);
  max-width:640px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;}
.hero-tags span{
  padding:7px 16px;
  border-radius:999px;
  font-size:13.5px;
  color:#fff;
  background:rgba(255,255,255,.13);
  border:1px solid rgba(255,255,255,.26);
}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section-white{background:#fff;}
.section-soft{background:var(--soft);}
.section-head{max-width:700px;margin-bottom:52px;}
.section-head h2{
  font-size:34px;
  font-weight:700;
  margin-bottom:16px;
}
.section-head p{font-size:16.5px;color:var(--muted);}
.kicker{
  display:inline-block;
  font-size:13px;font-weight:700;letter-spacing:2px;
  color:var(--brand-dark);
  text-transform:uppercase;
  margin-bottom:14px;
}
.kicker::after{
  content:"";
  display:block;
  width:38px;height:3px;border-radius:3px;
  background:var(--accent);
  margin-top:10px;
}

/* ---------- steps layout ---------- */
.steps-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 356px;
  gap:56px;
  align-items:start;
}
.steps{position:relative;}
.step{
  position:relative;
  padding-left:100px;
  padding-bottom:56px;
}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";
  position:absolute;
  left:31px;
  top:70px;
  bottom:16px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,rgba(18,168,196,.55),rgba(102,220,192,.18));
}
.step:last-child::before{display:none;}
.step-num{
  position:absolute;
  left:0;top:0;
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  border-radius:18px;
  font-size:24px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  color:#fff;
  background:var(--grad);
  box-shadow:0 10px 24px rgba(18,168,196,.26);
}
.step-body h3{
  font-size:21px;
  font-weight:700;
  margin-bottom:12px;
  padding-top:12px;
}
.step-body > p{color:var(--text);margin-bottom:18px;}
.step-points{
  display:grid;
  gap:10px;
  padding:20px 22px;
  border-radius:var(--radius-md);
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(14,23,32,.04);
}
.step-points li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--muted);
  line-height:1.75;
}
.step-points li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 3px rgba(18,168,196,.14);
}

/* ---------- sticky side card ---------- */
.side-card{
  position:sticky;
  top:96px;
  border-radius:var(--radius-lg);
  background:#fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  padding:30px 28px;
  transition:box-shadow .3s ease,transform .3s ease;
}
.side-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.side-card .mask{
  height:132px;
  border-radius:var(--radius-md);
  margin-bottom:22px;
  background-image:
    linear-gradient(135deg,rgba(11,40,52,.34),rgba(11,40,52,.12)),
    var(--grad),
    url("/assets/images/coverpic/cover-3.webp");
  background-size:cover;
  background-position:center;
  display:flex;
  align-items:flex-end;
  padding:14px 16px;
  color:#fff;
  font-size:13px;
  font-weight:600;
  letter-spacing:.5px;
}
.side-card h3{
  font-size:19px;
  margin-bottom:8px;
}
.side-card .sub{
  font-size:14px;
  color:var(--muted);
  margin-bottom:20px;
}
.side-points{display:grid;gap:14px;margin-bottom:24px;}
.side-points li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:14.5px;
  line-height:1.7;
  color:var(--text);
}
.side-points li .idx{
  flex:0 0 24px;
  width:24px;height:24px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;
  background:#E8F6F9;
  border:1px solid rgba(18,168,196,.34);
  color:var(--brand-dark);
  font-size:12.5px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  margin-top:2px;
}
.side-card .btn{width:100%;}
.side-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--muted);
  text-align:center;
  line-height:1.6;
}

/* ---------- compare cards ---------- */
.compare-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  align-items:stretch;
}
.compare-card{
  border-radius:var(--radius-lg);
  background:#fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .3s ease,box-shadow .3s ease;
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.compare-card .thumb{
  height:210px;
  background:var(--grad-soft);
  overflow:hidden;
}
.compare-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease;
}
.compare-card:hover .thumb img{transform:scale(1.04);}
.compare-card .body{padding:28px 30px 32px;}
.compare-card h3{font-size:20px;margin-bottom:12px;}
.compare-card p{font-size:15.5px;color:var(--muted);}
.tag{
  display:inline-block;
  padding:5px 13px;
  border-radius:8px;
  font-size:12.5px;
  font-weight:600;
  color:var(--brand-dark);
  background:#E8F6F9;
  border:1px solid rgba(18,168,196,.24);
  margin-bottom:14px;
}

/* ---------- data strip ---------- */
.data-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:52px;
}
.data-chip{
  border-radius:var(--radius-md);
  background:#fff;
  border:1px solid var(--line);
  padding:24px 26px;
  box-shadow:0 1px 2px rgba(14,23,32,.04);
}
.data-chip strong{
  display:block;
  font-size:30px;
  font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:6px;
}
.data-chip span{font-size:13.5px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px;}
.faq-item{
  border-radius:var(--radius-md);
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(14,23,32,.04);
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:rgba(18,168,196,.5);box-shadow:0 8px 26px rgba(18,168,196,.10);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 24px;
  min-height:60px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  background:transparent;
  border:0;
  cursor:pointer;
}
.faq-q:hover{color:var(--brand-dark);}
.faq-icon{
  flex:0 0 28px;
  width:28px;height:28px;
  position:relative;
  border-radius:50%;
  background:#E8F6F9;
  border:1px solid rgba(18,168,196,.3);
  transition:transform .22s ease,background .22s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:var(--brand-dark);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;transition:opacity .22s ease;}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--brand);border-color:var(--brand);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:#fff;}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease;
  background:#F7FBFC;
  box-shadow:inset 0 1px 0 var(--line);
}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a p{padding:18px 24px 22px;font-size:15.5px;color:var(--muted);line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  padding:88px 0;
  color:#fff;
  overflow:hidden;
  background-image:
    linear-gradient(135deg,rgba(11,40,52,.58),rgba(11,40,52,.42)),
    linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover,cover,cover;
  background-position:center;
}
.cta-band .container{position:relative;z-index:2;}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{color:#fff;font-size:32px;margin-bottom:12px;}
.cta-inner p{color:rgba(255,255,255,.88);font-size:16px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;
  height:3px;
  background:var(--grad);
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:56px;
}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand .logo:hover{color:var(--mint);}
.footer-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:18px;
  letter-spacing:.5px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-col a:hover{color:#fff;}
.footer-col address{
  font-style:normal;
  font-size:14.5px;
  line-height:1.95;
  color:rgba(255,255,255,.66);
}
.footer-col address strong{display:block;color:#fff;font-weight:600;margin-bottom:6px;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 28px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;
  color:rgba(255,255,255,.52);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .page-hero h1{font-size:44px;}
  .steps-layout{grid-template-columns:minmax(0,1fr) 320px;gap:40px;}
}
@media (max-width:1023px){
  .main-nav{
    position:fixed;
    inset:64px 0 0 0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:26px 24px 40px;
    background:rgba(255,255,255,.96);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    transform:translateY(-14px);
    opacity:0;
    visibility:hidden;
    transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .main-nav a{
    color:var(--ink);
    font-size:17px;
    padding:14px 10px;
    border-radius:12px;
    border-bottom:1px solid var(--line);
  }
  .main-nav a::after{display:none;}
  .main-nav a.active{color:var(--brand-dark);background:#EAF7FA;}
  .nav-toggle{display:flex;}
  .header-actions .btn-outline-light{display:none;}
  .steps-layout{grid-template-columns:1fr;gap:44px;}
  .side-card{position:static;top:auto;}
  .section{padding:72px 0;}
  .page-hero{padding:130px 0 72px;}
  .page-hero h1{font-size:38px;}
  .compare-grid{grid-template-columns:1fr;}
  .data-strip{grid-template-columns:1fr 1fr;}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .page-hero{padding:112px 0 60px;}
  .page-hero h1{font-size:30px;line-height:1.28;}
  .page-hero .lede{font-size:16px;}
  .hero-tags{margin-top:22px;gap:8px;}
  .hero-tags span{font-size:12.5px;padding:6px 13px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:34px;}
  .section-head h2{font-size:24px;}
  .kicker{font-size:12px;letter-spacing:1.4px;}
  .step{padding-left:72px;padding-bottom:40px;}
  .step-num{width:48px;height:48px;font-size:18px;border-radius:14px;}
  .step::before{left:23px;top:54px;}
  .step-body h3{font-size:18px;padding-top:6px;}
  .step-points{padding:16px 18px;}
  .step-points li{font-size:14.5px;}
  .data-strip{grid-template-columns:1fr;margin-top:34px;}
  .side-card{padding:24px 20px;}
  .compare-card .body{padding:22px 22px 26px;}
  .compare-card .thumb{height:170px;}
  .faq-q{padding:16px 18px;font-size:15.5px;}
  .faq-a p{padding:16px 18px 20px;font-size:14.5px;}
  .cta-band{padding:56px 0;}
  .cta-inner h2{font-size:23px;}
  .cta-inner p{font-size:15px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-top{grid-template-columns:1fr;gap:32px;padding-bottom:40px;}
  .site-footer{padding-top:52px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:480px){
  .logo-text strong{font-size:15.5px;}
  .logo-text em{font-size:10.5px;letter-spacing:2px;}
  .page-hero h1{font-size:27px;}
  .btn{padding:11px 20px;font-size:14.5px;}
  .faq-q{font-size:15px;}
}

/* roulang page: category3 */
:root{
  --primary:#12A8C4;
  --primary-dark:#0B7A90;
  --accent:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --soft:#F3F8FA;
  --bg:#F6FAFB;
  --white:#FFFFFF;
  --grad:linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%);
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:14px;
  --radius-pill:999px;
  --radius-badge:8px;
  --shadow-card:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --shadow-hover:0 16px 40px rgba(18,168,196,.18);
  --container:1200px;
  --header-h:76px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:-.3px;}
p{margin:0;}
a{color:var(--primary-dark);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary);}
img{max-width:100%;display:block;}
button{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(18,168,196,.22);}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:15px 30px;
  border-radius:var(--radius-pill);
  font-size:15.5px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#0B7A90 0%,#12A8C4 62%,#3FC6C6 100%);
  color:#fff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 8px 20px rgba(11,122,144,.28);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-2px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.36),0 12px 28px rgba(11,122,144,.38),0 0 0 2px rgba(18,168,196,.28);
}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:#fff;
  border-color:var(--primary);
  color:var(--primary-dark);
}
.btn-ghost:hover{background:#EAF7FA;color:var(--primary-dark);transform:translateY(-2px);}
.btn-ghost:active{transform:scale(.98);}
.btn-outline-light{
  background:rgba(255,255,255,.12);
  border-color:rgba(255,255,255,.6);
  color:#fff;
  padding:11px 22px;
  font-size:14.5px;
}
.btn-outline-light:hover{background:rgba(255,255,255,.24);color:#fff;}
.btn-lg{padding:17px 36px;font-size:16px;}
.link-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--primary-dark);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.link-cta::after{content:"→";transition:transform .24s ease;}
.link-cta:hover{color:var(--primary);border-bottom-color:var(--primary);}
.link-cta:hover::after{transform:translateX(4px);}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  display:flex;
  align-items:center;
  height:var(--header-h);
  color:#fff;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 6px 24px rgba(11,40,52,.12);
  transition:background .24s ease,height .24s ease,color .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(255,255,255,.96);
  color:var(--ink);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(11,40,52,.1);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  width:100%;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:inherit;
  flex:none;
}
.logo:hover{color:inherit;}
.logo-mark{width:34px;height:34px;flex:none;}
.logo-text{display:flex;flex-direction:column;line-height:1.06;}
.logo-text strong{font-size:17px;font-weight:800;letter-spacing:.6px;}
.logo-text em{font-style:normal;font-size:10.5px;letter-spacing:3px;opacity:.72;}

.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.main-nav a{
  position:relative;
  padding:9px 12px;
  font-size:15px;
  font-weight:600;
  border-radius:8px;
  color:rgba(255,255,255,.9);
  transition:color .2s ease,background .2s ease;
}
.site-header.is-scrolled .main-nav a{color:var(--muted);}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:1px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.main-nav a:hover,
.main-nav a.active{color:#fff;}
.site-header.is-scrolled .main-nav a:hover,
.site-header.is-scrolled .main-nav a.active{color:var(--primary-dark);}
.main-nav a:hover::after,
.main-nav a.active::after{transform:scaleX(1);}

.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:6px;
}
.site-header.is-scrolled .btn-outline-light{
  border-color:var(--primary);
  color:var(--primary-dark);
  background:#fff;
}
.site-header.is-scrolled .btn-outline-light:hover{background:#EAF7FA;color:var(--primary-dark);}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;height:42px;
  border-radius:11px;
  border:1px solid rgba(255,255,255,.42);
  background:rgba(255,255,255,.12);
  cursor:pointer;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  margin:0 auto;
  border-radius:2px;
  background:currentColor;
}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:#fff;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:calc(var(--header-h) + 84px) 0 88px;
  color:#fff;
  overflow:hidden;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:var(--grad);
  opacity:.92;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:rgba(11,40,52,.5);
}
.page-hero .container{position:relative;z-index:2;}

.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:rgba(255,255,255,.74);
  margin-bottom:26px;
  flex-wrap:wrap;
}
.breadcrumb a{color:rgba(255,255,255,.86);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:rgba(255,255,255,.66);}

.hero-tag{
  display:inline-block;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:2px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.32);
  color:#fff;
  margin-bottom:20px;
}
.page-hero h1{
  color:#fff;
  font-size:52px;
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.5px;
  max-width:820px;
}
.page-hero .hero-lead{
  margin-top:18px;
  font-size:18px;
  line-height:1.7;
  color:rgba(255,255,255,.88);
  max-width:620px;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-top:34px;
  flex-wrap:wrap;
}
.hero-actions .btn-ghost{
  background:rgba(255,255,255,.96);
  border-color:transparent;
  color:var(--primary-dark);
}
.hero-actions .btn-ghost:hover{background:#fff;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-white{background:#fff;}
.section-soft{background:var(--soft);}
.section-dark{
  background:#0E1720;
  color:rgba(255,255,255,.78);
  position:relative;
  overflow:hidden;
}
.section-dark::before{
  content:"";
  position:absolute;
  top:-120px;right:-120px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(18,168,196,.28),transparent 68%);
}
.section-dark .container{position:relative;z-index:2;}

.section-head{max-width:720px;margin-bottom:52px;}
.eyebrow{
  display:inline-block;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--primary-dark);
  background:#E8F6F9;
  border:1px solid #C7E9F1;
  padding:5px 13px;
  border-radius:var(--radius-pill);
  margin-bottom:16px;
}
.section-head h2{font-size:34px;margin-bottom:16px;}
.section-head p{color:var(--muted);font-size:16px;line-height:1.9;}
.section-dark .section-head h2{color:#fff;}
.section-dark .section-head p{color:rgba(255,255,255,.72);}
.section-dark .eyebrow{
  color:#9BE9DA;
  background:rgba(102,220,192,.1);
  border-color:rgba(102,220,192,.34);
}

/* ============ 数据徽章 ============ */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.stat-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:28px 24px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.stat-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:#BFE6EF;
}
.stat-card .stat-value{
  display:block;
  font-size:32px;
  font-weight:800;
  line-height:1.1;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.5px;
}
.stat-card .stat-value small{
  font-size:15px;
  font-weight:700;
  color:var(--primary-dark);
  margin-left:5px;
}
.stat-card h3{
  font-size:16.5px;
  font-weight:700;
  margin:14px 0 8px;
}
.stat-card p{
  font-size:13.5px;
  line-height:1.75;
  color:var(--muted);
}
.stat-note{
  margin-top:26px;
  font-size:13.5px;
  color:var(--muted);
  padding-left:14px;
  border-left:3px solid var(--line);
}

/* ============ 引用式说明 ============ */
.quote-block{
  background:#fff;
  border:1px solid var(--line);
  border-left:4px solid var(--primary);
  border-radius:var(--radius-md);
  padding:36px 40px;
  box-shadow:var(--shadow-card);
}
.quote-block p{
  font-size:19px;
  line-height:1.85;
  color:var(--ink);
  font-weight:500;
}
.quote-block .quote-meta{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:20px;
  font-size:13.5px;
  color:var(--muted);
}
.quote-block .quote-meta::before{
  content:"";
  width:22px;height:2px;
  background:var(--accent);
  border-radius:2px;
}

/* ============ 案例长卡 ============ */
.case-list{display:grid;gap:26px;}
.case-card{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:34px;
  align-items:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.case-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:#BFE6EF;
}
.case-thumb{
  position:relative;
  aspect-ratio:16/10;
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:var(--grad);
}
.case-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease;
}
.case-card:hover .case-thumb img{transform:scale(1.04);}
.case-body{min-width:0;}
.case-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.chip{
  display:inline-block;
  font-size:12.5px;
  font-weight:600;
  color:var(--primary-dark);
  background:#E8F6F9;
  border:1px solid #C7E9F1;
  border-radius:var(--radius-badge);
  padding:4px 10px;
}
.chip-accent{
  color:#C23A12;
  background:#FFEFE9;
  border-color:#FFD2C3;
}
.case-body h3{font-size:21px;margin-bottom:12px;}
.case-body p{font-size:15px;line-height:1.85;color:var(--muted);}
.case-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:18px;
  flex-wrap:wrap;
}
.case-meta{
  font-size:13px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

/* ============ 更新节奏（深底列表） ============ */
.rhythm-list{
  border-top:1px solid rgba(255,255,255,.16);
}
.rhythm-item{
  display:grid;
  grid-template-columns:92px 1fr;
  gap:28px;
  padding:30px 0;
  border-bottom:1px solid rgba(255,255,255,.16);
  transition:background .25s ease;
}
.rhythm-item:hover{background:rgba(255,255,255,.03);}
.rhythm-item .num{
  font-size:34px;
  font-weight:800;
  line-height:1;
  color:rgba(102,220,192,.92);
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
}
.rhythm-item h3{
  color:#fff;
  font-size:19px;
  margin-bottom:8px;
}
.rhythm-item p{
  font-size:15px;
  line-height:1.85;
  color:rgba(255,255,255,.72);
  max-width:760px;
}

/* ============ 转化条 ============ */
.cta-band{
  position:relative;
  padding:76px 0;
  background:var(--grad);
  overflow:hidden;
  color:#fff;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(11,40,52,.28);
}
.cta-band .container{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-band h2{
  color:#fff;
  font-size:32px;
  margin-bottom:12px;
}
.cta-band p{
  color:rgba(255,255,255,.88);
  font-size:16px;
  max-width:560px;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-actions .btn-primary{
  background:#fff;
  color:var(--primary-dark);
  box-shadow:0 10px 26px rgba(11,40,52,.24);
}
.cta-actions .btn-primary:hover{
  background:#F1FBFD;
  color:var(--primary-dark);
  box-shadow:0 14px 32px rgba(11,40,52,.3),0 0 0 2px rgba(255,255,255,.4);
}
.cta-actions .btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,.7);
  color:#fff;
}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:#0E1720;
  color:rgba(255,255,255,.72);
  padding-top:72px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,#0B7A90,#12A8C4,#66DCC0);
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:44px;
  padding-bottom:56px;
}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand p{
  font-size:14.5px;
  line-height:1.85;
  max-width:330px;
  color:rgba(255,255,255,.66);
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:18px;
  letter-spacing:.5px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  color:rgba(255,255,255,.72);
  font-size:14.5px;
}
.footer-col a:hover{color:#fff;}
.footer-col address{
  font-style:normal;
  font-size:14.5px;
  line-height:1.95;
  color:rgba(255,255,255,.66);
}
.footer-col address strong{
  display:block;
  color:#fff;
  margin-bottom:6px;
  font-weight:600;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:rgba(255,255,255,.56);
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;
  right:26px;
  bottom:26px;
  width:48px;height:48px;
  border-radius:50%;
  border:1px solid rgba(18,168,196,.28);
  background:#fff;
  color:var(--primary-dark);
  font-size:18px;
  line-height:1;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 10px 24px rgba(14,23,32,.14);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease,background .2s ease;
  z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:#EAF7FA;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 28px;}
  .page-hero h1{font-size:46px;}
  .case-card{grid-template-columns:280px 1fr;gap:28px;}
  .footer-top{grid-template-columns:1.5fr 1fr 1fr;gap:36px;}
  .footer-col:last-child{grid-column:1 / -1;}
}

@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .page-hero{padding:calc(64px + 68px) 0 72px;}
  .page-hero h1{font-size:38px;}
  .page-hero .hero-lead{font-size:16.5px;}
  .section-head h2{font-size:28px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:20px;}
  .case-card{grid-template-columns:240px 1fr;gap:22px;padding:20px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-col:last-child{grid-column:auto;}

  .main-nav{
    position:fixed;
    top:64px;
    left:0;right:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px 20px 26px;
    background:rgba(255,255,255,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(11,40,52,.16);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
    max-height:calc(100vh - 64px);
    overflow:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none;}
  .site-header .main-nav a{
    color:var(--ink);
    font-size:16.5px;
    padding:13px 12px;
    border-radius:10px;
  }
  .site-header .main-nav a:hover{background:#F3F8FA;color:var(--primary-dark);}
  .site-header .main-nav a.active{color:var(--primary-dark);background:#EAF7FA;}
  .site-header .main-nav a::after{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .btn-outline-light{display:none;}
}

@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .page-hero{padding:calc(64px + 52px) 0 56px;}
  .page-hero h1{font-size:30px;line-height:1.22;letter-spacing:-.2px;}
  .page-hero .hero-lead{font-size:15.5px;margin-top:14px;}
  .hero-actions{margin-top:26px;gap:12px;}
  .hero-actions .btn{width:100%;}
  .section-head{margin-bottom:34px;}
  .section-head h2{font-size:24px;}
  .section-head p{font-size:15px;}
  .stat-strip{grid-template-columns:1fr;gap:16px;}
  .stat-card{padding:22px 20px;}
  .quote-block{padding:26px 22px;}
  .quote-block p{font-size:17px;}
  .case-card{grid-template-columns:1fr;gap:18px;padding:18px;border-radius:18px;}
  .case-body h3{font-size:19px;}
  .rhythm-item{grid-template-columns:56px 1fr;gap:16px;padding:24px 0;}
  .rhythm-item .num{font-size:26px;}
  .rhythm-item h3{font-size:17.5px;}
  .cta-band{padding:56px 0;}
  .cta-band h2{font-size:24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:30px;padding-bottom:40px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;padding-bottom:28px;}
  .to-top{right:16px;bottom:16px;width:44px;height:44px;}
}

@media (max-width:480px){
  .page-hero h1{font-size:27px;}
  .logo-text strong{font-size:15.5px;}
  .logo-text em{letter-spacing:2px;}
}

/* roulang page: category4 */
:root{
  --brand:#12A8C4;
  --brand-dark:#0B7A90;
  --accent:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --surface:#F3F8FA;
  --ice:#E8F6F9;
  --page:#F6FAFB;
  --white:#FFFFFF;
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-badge:8px;
  --r-img:14px;
  --shadow-card:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --shadow-hover:0 16px 40px rgba(18,168,196,.18);
  --container:1200px;
  --ease:240ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-dark);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
section[id]{scroll-margin-top:104px;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:76px;
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 6px 24px rgba(11,40,52,.12);
  transition:background var(--ease),height var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;transition:height var(--ease);}
.logo{display:inline-flex;align-items:center;gap:11px;color:var(--white);flex:0 0 auto;}
.logo-mark{width:36px;height:36px;flex:0 0 auto;color:inherit;}
.logo-text{display:flex;flex-direction:column;line-height:1.05;}
.logo-text strong{font-size:19px;font-weight:800;letter-spacing:.5px;}
.logo-text em{font-style:normal;font-size:11.5px;letter-spacing:3px;opacity:.78;margin-top:3px;}
.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav a{
  position:relative;
  color:rgba(255,255,255,.92);
  font-size:15px;
  font-weight:600;
  padding:6px 0;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:2px;
  background:var(--white);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
  border-radius:2px;
}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a:hover{color:var(--white);}
.header-actions{display:flex;align-items:center;gap:14px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15.5px;font-weight:600;
  padding:12px 26px;border-radius:999px;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  border:1px solid transparent;
}
.btn-primary{
  color:var(--white);
  background:linear-gradient(135deg,var(--brand-dark) 0%,var(--brand) 55%,var(--mint) 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 8px 20px rgba(11,122,144,.22);
}
.btn-primary:hover{
  color:var(--white);
  filter:brightness(1.06);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 0 0 2px rgba(18,168,196,.28),0 14px 30px rgba(11,122,144,.28);
}
.btn-primary:active{transform:scale(.98);}
.btn-outline{color:var(--brand);background:var(--white);border-color:var(--brand);}
.btn-outline:hover{background:#EAF7FA;color:var(--brand-dark);}
.btn-outline-light{color:var(--white);background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6);}
.btn-outline-light:hover{background:rgba(255,255,255,.92);color:var(--brand-dark);border-color:var(--white);}
.btn-block{width:100%;}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border:1px solid rgba(255,255,255,.42);}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--white);border-radius:2px;transition:transform var(--ease),opacity var(--ease),background var(--ease);}
.site-header.is-scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(14,23,32,.12);height:64px;}
.site-header.is-scrolled .header-inner{height:64px;}
.site-header.is-scrolled .logo{color:var(--ink);}
.site-header.is-scrolled .main-nav a{color:var(--text);}
.site-header.is-scrolled .main-nav a:hover,.site-header.is-scrolled .main-nav a.active{color:var(--brand-dark);}
.site-header.is-scrolled .main-nav a::after{background:var(--brand);}
.site-header.is-scrolled .btn-outline-light{color:var(--brand-dark);background:var(--white);border-color:var(--brand);}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);}
.site-header.is-scrolled .nav-toggle span{background:var(--ink);}

/* ---------- 页首横幅 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:158px 0 76px;
  color:var(--white);
  background:
    linear-gradient(135deg,rgba(11,40,52,.86) 0%,rgba(11,122,144,.78) 55%,rgba(102,220,192,.5) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat,
    linear-gradient(135deg,#0B7A90,#12A8C4);
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.78);margin-bottom:22px;}
.crumbs a{color:rgba(255,255,255,.88);}
.crumbs a:hover{color:var(--white);}
.crumbs span.sep{opacity:.55;}
.crumbs .current{color:rgba(255,255,255,.62);}
.page-hero h1{
  color:var(--white);
  font-size:52px;
  font-weight:800;
  letter-spacing:-.5px;
  line-height:1.15;
  max-width:860px;
}
.page-hero .hero-lead{
  margin-top:18px;
  max-width:720px;
  font-size:17.5px;
  line-height:1.75;
  color:rgba(255,255,255,.88);
}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 15px;border-radius:999px;
  font-size:13.5px;font-weight:600;
  color:var(--white);
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
}
.chip i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block;}

/* ---------- 主结构 ---------- */
.main-wrap{padding:76px 0 96px;}
.layout-split{display:grid;grid-template-columns:290px minmax(0,1fr);gap:52px;align-items:start;}
.toc{
  position:sticky;top:96px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  padding:26px 24px;
}
.toc h2{
  font-size:17px;
  margin-bottom:6px;
}
.toc .toc-sub{font-size:13.5px;color:var(--muted);margin-bottom:18px;line-height:1.7;}
.toc ol{counter-reset:toc;}
.toc li{counter-increment:toc;margin-bottom:4px;}
.toc li a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;
  border-radius:var(--r-sm);
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.toc li a::before{
  content:counter(toc,decimal-leading-zero);
  font-size:12.5px;
  font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  opacity:.85;
}
.toc li a:hover{background:var(--ice);color:var(--brand-dark);transform:translateX(3px);}
.toc .toc-cta{
  margin-top:20px;
  padding-top:18px;
  border-top:1px dashed var(--line);
  font-size:13px;
  color:var(--muted);
  line-height:1.75;
}
.toc .toc-cta a{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:13.5px;margin-top:8px;}
.toc .toc-cta a::after{content:"→";transition:transform var(--ease);}
.toc .toc-cta a:hover::after{transform:translateX(4px);}

.faq-main{min-width:0;}
.intro-card{
  display:grid;
  grid-template-columns:1fr 300px;
  gap:32px;
  align-items:center;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  padding:32px;
  margin-bottom:44px;
}
.intro-card h2{font-size:26px;margin-bottom:12px;}
.intro-card p{font-size:15.5px;color:var(--text);}
.intro-figure{margin:0;}
.intro-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line);}

.qgroup{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  padding:30px 32px 34px;
  margin-bottom:26px;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.qgroup:hover{box-shadow:var(--shadow-hover);border-color:#C9E4EC;}
.qgroup-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:22px;}
.qgroup-num{
  flex:0 0 auto;
  width:46px;height:46px;
  border-radius:14px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;
  color:var(--brand-dark);
  background:var(--ice);
  border:1px solid #CDEAF1;
  font-variant-numeric:tabular-nums;
}
.qgroup-head h2{font-size:22px;margin-bottom:4px;}
.qgroup-head .qgroup-note{font-size:13.5px;color:var(--muted);line-height:1.7;}

.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--white);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:last-child{margin-bottom:0;}
.faq-item[open]{border-color:#BFE4EE;box-shadow:0 6px 18px rgba(18,168,196,.10);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;
  padding:14px 20px;
  cursor:pointer;
  list-style:none;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:background var(--ease),color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:#F5FBFD;color:var(--brand-dark);}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:26px;height:26px;border-radius:50%;
  background:var(--ice);
  border:1px solid #CDEAF1;
  transition:transform var(--ease),background var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-dark);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:2px;}
.faq-icon::after{width:2px;height:11px;transition:opacity var(--ease);}
.faq-item[open] .faq-icon{transform:rotate(180deg);background:var(--white);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-body{
  padding:6px 20px 22px;
  background:#F7FBFC;
  border-top:1px solid #E4EFF4;
  box-shadow:inset 0 6px 12px -10px rgba(14,23,32,.25);
  font-size:15.5px;
  color:var(--text);
  line-height:1.85;
}
.faq-body p{margin:12px 0 0;font-size:15.5px;}
.faq-body ul{margin:12px 0 0;padding-left:0;}
.faq-body li{position:relative;padding-left:18px;margin-bottom:8px;font-size:15px;color:var(--text);}
.faq-body li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.faq-body strong{color:var(--brand-dark);}

/* ---------- 流程 ---------- */
.flow-section{padding:96px 0;background:var(--surface);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.5px;
  color:var(--brand-dark);
  background:var(--ice);
  border:1px solid #CDEAF1;
  border-radius:var(--r-badge);
  padding:5px 12px;
  margin-bottom:16px;
}
.section-head h2{font-size:34px;letter-spacing:-.3px;}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;}
.flow-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.flow-card{
  position:relative;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px 28px;
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease);
}
.flow-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.flow-num{
  font-size:34px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1;
  margin-bottom:16px;
  letter-spacing:-1px;
}
.flow-card h3{font-size:19px;margin-bottom:10px;}
.flow-card p{font-size:15px;color:var(--muted);}

/* ---------- 数据条 ---------- */
.stats-band{background:var(--ink);padding:76px 0;color:var(--white);}
.stats-band .section-head h2{color:var(--white);}
.stats-band .section-head p{color:rgba(255,255,255,.68);}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.stat-card{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-md);
  padding:24px 22px;
  transition:background var(--ease),transform var(--ease);
}
.stat-card:hover{background:rgba(255,255,255,.13);transform:translateY(-3px);}
.stat-card strong{
  display:block;
  font-size:30px;
  font-weight:800;
  color:var(--mint);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat-card span{display:block;font-size:13px;color:rgba(255,255,255,.72);margin-top:8px;line-height:1.7;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:88px 0;
  color:var(--white);
  background:
    linear-gradient(135deg,rgba(11,40,52,.82) 0%,rgba(11,122,144,.74) 60%,rgba(102,220,192,.46) 100%),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat,
    linear-gradient(135deg,#0B7A90,#12A8C4);
}
.cta-inner{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:44px;
  align-items:center;
  position:relative;z-index:2;
}
.cta-inner h2{color:var(--white);font-size:34px;letter-spacing:-.3px;}
.cta-inner p{margin-top:16px;color:rgba(255,255,255,.86);font-size:16px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-panel{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--r-lg);
  padding:26px 24px;
  backdrop-filter:blur(8px);
}
.cta-panel h3{color:var(--white);font-size:17px;margin-bottom:14px;}
.cta-panel ul li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:rgba(255,255,255,.86);
  padding:7px 0;
}
.cta-panel ul li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;
  background:var(--accent);margin-top:9px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  border-top:3px solid transparent;
  border-image:linear-gradient(90deg,var(--brand-dark),var(--brand),var(--mint)) 1;
  padding-top:64px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{color:var(--white);margin-bottom:18px;}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{color:var(--white);font-size:15px;margin-bottom:16px;font-weight:700;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{color:rgba(255,255,255,.72);font-size:14px;transition:color var(--ease),padding-left var(--ease);}
.footer-col ul li a:hover{color:var(--white);padding-left:4px;}
.footer-col address{font-style:normal;font-size:14px;line-height:2;color:rgba(255,255,255,.66);}
.footer-col address strong{display:block;color:var(--white);font-weight:700;margin-bottom:4px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ---------- 浮动 CTA / 回到顶部 ---------- */
.float-cta{
  position:fixed;right:28px;bottom:32px;z-index:110;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:999px;
  color:var(--white);font-size:15px;font-weight:700;
  background:linear-gradient(135deg,var(--brand-dark),var(--brand) 60%,var(--mint));
  box-shadow:0 14px 32px rgba(11,122,144,.34);
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
}
.float-cta:hover{color:var(--white);transform:translateY(-3px);filter:brightness(1.05);box-shadow:0 18px 40px rgba(11,122,144,.42);}
.to-top{
  position:fixed;right:28px;bottom:104px;z-index:110;
  width:46px;height:46px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--white);color:var(--brand-dark);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),box-shadow var(--ease);
  font-size:18px;font-weight:700;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{box-shadow:var(--shadow-hover);color:var(--brand);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 26px;}
  .page-hero h1{font-size:46px;}
  .layout-split{grid-template-columns:254px minmax(0,1fr);gap:36px;}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  .main-nav{gap:18px;}
  .main-nav a{font-size:14px;}
  .page-hero{padding:140px 0 64px;}
  .page-hero h1{font-size:40px;}
  .main-wrap{padding:56px 0 72px;}
  .layout-split{grid-template-columns:1fr;gap:28px;}
  .toc{position:static;}
  .toc ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 12px;}
  .intro-card{grid-template-columns:1fr;gap:22px;}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:30px;}
  .footer-top{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    top:0;right:0;
    width:min(360px,86vw);
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:96px 26px 32px;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    box-shadow:-18px 0 46px rgba(14,23,32,.16);
    transform:translateX(100%);
    transition:transform var(--ease);
    overflow-y:auto;
  }
  .main-nav a{
    color:var(--ink);
    font-size:17px;
    padding:16px 4px;
    border-bottom:1px solid var(--line);
  }
  .main-nav a::after{display:none;}
  .main-nav a:hover,.main-nav a.active{color:var(--brand-dark);}
  body.menu-open .main-nav{transform:translateX(0);}
  .header-actions .btn-outline-light{display:none;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .site-header{height:64px;}
  .header-inner{height:64px;}
  .site-header.is-scrolled{height:60px;}
  .site-header.is-scrolled .header-inner{height:60px;}
  .logo-text strong{font-size:17px;}
  .logo-text em{font-size:10px;letter-spacing:2.4px;}
  .logo-mark{width:32px;height:32px;}
  .page-hero{padding:118px 0 52px;}
  .page-hero h1{font-size:30px;letter-spacing:0;}
  .page-hero .hero-lead{font-size:15.5px;}
  .hero-chips{margin-top:20px;}
  .main-wrap{padding:44px 0 68px;}
  .toc ol{grid-template-columns:1fr;}
  .qgroup{padding:22px 20px 24px;}
  .qgroup-head h2{font-size:19px;}
  .qgroup-num{width:40px;height:40px;border-radius:12px;font-size:14px;}
  .faq-item summary{font-size:15.5px;padding:12px 16px;}
  .faq-body{padding:4px 16px 20px;}
  .flow-section,.stats-band,.cta-band{padding:52px 0;}
  .section-head h2{font-size:24px;}
  .flow-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .cta-inner h2{font-size:24px;}
  .cta-actions .btn{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;
    width:100%;justify-content:center;
    padding:16px 18px calc(16px + env(safe-area-inset-bottom));
    font-size:15px;
  }
  .to-top{right:16px;bottom:88px;width:42px;height:42px;}
  .main-wrap,.faq-main{padding-bottom:8px;}
  body{padding-bottom:64px;}
}
@media (max-width:480px){
  .page-hero h1{font-size:26px;}
  .intro-card{padding:22px 20px;}
  .intro-card h2{font-size:21px;}
}

/* roulang page: category5 */
:root{
  --ice:#12A8C4;
  --ice-deep:#0B7A90;
  --ice-soft:#E8F6F9;
  --orange:#FF5C2B;
  --mint:#66DCC0;
  --ink:#0E1720;
  --text:#2C3A45;
  --muted:#5D6E7A;
  --line:#DCE6EC;
  --soft:#F3F8FA;
  --white:#FFFFFF;
  --bg:#F6FAFB;
  --danger:#D93A2B;
  --grad:linear-gradient(135deg,#0B7A90 0%,#12A8C4 55%,#66DCC0 100%);
  --grad-soft:linear-gradient(135deg,#EAF7FA 0%,#F6FAFB 60%,#EFFBF7 100%);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,23,32,.05),0 8px 24px rgba(14,23,32,.06);
  --sh-2:0 16px 40px rgba(18,168,196,.18);
  --sh-nav:0 6px 24px rgba(11,40,52,.12);
  --container:1200px;
  --ease:cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ice-deep);text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--ice);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:3px solid rgba(255,92,43,.45);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:76px;
  display:flex;
  align-items:center;
  color:#fff;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:var(--sh-nav);
  transition:height .24s var(--ease),background .24s var(--ease),color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(255,255,255,.96);
  color:var(--ink);
  border-bottom-color:var(--line);
  box-shadow:0 6px 24px rgba(11,40,52,.08);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  width:100%;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  color:inherit;
  text-decoration:none;
  flex:none;
}
.logo:hover{color:inherit;}
.logo-mark{width:36px;height:36px;flex:none;}
.logo-text{display:flex;flex-direction:column;line-height:1.08;}
.logo-text strong{font-size:19px;font-weight:800;letter-spacing:.5px;}
.logo-text em{font-style:normal;font-size:11.5px;letter-spacing:2.4px;opacity:.72;font-weight:500;}
.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav a{
  position:relative;
  padding:6px 0;
  color:inherit;
  font-size:15px;
  font-weight:600;
  opacity:.92;
  text-decoration:none;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:currentColor;
  border-radius:2px;
  transition:width .24s var(--ease);
}
.main-nav a:hover{opacity:1;}
.main-nav a:hover::after{width:100%;}
.main-nav a.active{opacity:1;}
.main-nav a.active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;flex:none;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  padding:12px 26px;
  font-size:15.5px;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),filter .24s var(--ease);
}
.btn-primary{
  color:#fff;
  background:var(--grad);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 24px rgba(18,168,196,.28);
}
.btn-primary:hover{
  color:#fff;
  filter:brightness(1.06);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 14px 30px rgba(18,168,196,.34),0 0 0 2px rgba(18,168,196,.28);
  transform:translateY(-2px);
}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  color:var(--ice-deep);
  background:#fff;
  border-color:var(--ice);
}
.btn-ghost:hover{background:var(--ice-soft);color:var(--ice-deep);transform:translateY(-2px);}
.btn-ghost:active{transform:scale(.98);}
.btn-outline-light{
  color:#fff;
  background:transparent;
  border-color:rgba(255,255,255,.62);
  padding:9px 20px;
  font-size:14.5px;
}
.btn-outline-light:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff;}
.site-header.is-scrolled .btn-outline-light{
  color:var(--ice-deep);
  border-color:var(--ice);
  background:transparent;
}
.site-header.is-scrolled .btn-outline-light:hover{background:var(--ice-soft);color:var(--ice-deep);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid rgba(255,255,255,.4);
  border-radius:12px;
  background:rgba(255,255,255,.1);
  padding:0;
  position:relative;
}
.nav-toggle span{
  display:block;
  position:absolute;
  left:12px;right:12px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .28s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:var(--soft);color:var(--ink);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ 页面首屏 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:172px 0 84px;
  color:#fff;
  background-image:
    linear-gradient(180deg,rgba(11,40,52,.72) 0%,rgba(11,40,52,.52) 46%,rgba(11,40,52,.62) 100%),
    linear-gradient(135deg,rgba(11,122,144,.86) 0%,rgba(18,168,196,.7) 55%,rgba(102,220,192,.6) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover,cover,cover;
  background-position:center,center,center;
  background-repeat:no-repeat;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(115deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.5;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13.5px;
  color:rgba(255,255,255,.78);
  margin-bottom:24px;
}
.breadcrumb a{color:rgba(255,255,255,.86);text-decoration:none;}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb span.sep{opacity:.5;}
.breadcrumb .current{color:rgba(255,255,255,.68);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.32);
  font-size:13px;
  font-weight:600;
  letter-spacing:1.6px;
  color:#fff;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,92,43,.28);
}
.page-hero h1{
  color:#fff;
  font-size:clamp(30px,4vw,48px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.6px;
  max-width:820px;
}
.hero-lead{
  margin-top:18px;
  max-width:660px;
  font-size:18px;
  line-height:1.7;
  color:rgba(255,255,255,.88);
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:32px;
}
.meta-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--r-sm);
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.24);
  font-size:13.5px;
  color:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.meta-chip strong{color:#fff;font-weight:800;font-size:15px;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-soft{background:var(--soft);}
.section-dark{
  background:var(--ink);
  color:rgba(255,255,255,.78);
}
.section-dark h2,.section-dark h3{color:#fff;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head p{margin-top:14px;color:var(--muted);font-size:16.5px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.28;letter-spacing:-.4px;}
h3{font-size:20px;font-weight:600;}
.section-eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--ice-deep);
  margin-bottom:14px;
}
.section-dark .section-eyebrow{color:var(--mint);}
.lead{font-size:17px;color:var(--muted);}

/* 图文两栏 */
.split{
  display:grid;
  grid-template-columns:1.02fr 1fr;
  gap:56px;
  align-items:center;
}
.split-media{
  position:relative;
  margin:0;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  aspect-ratio:4/3.2;
  background:var(--grad-soft);
}
.split-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.split-media:hover img{transform:scale(1.03);}
.split-media figcaption{
  position:absolute;
  left:16px;bottom:16px;
  padding:7px 14px;
  border-radius:var(--r-pill);
  background:rgba(14,23,32,.66);
  color:#fff;
  font-size:12.5px;
  letter-spacing:.6px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.split-body p + p{margin-top:16px;}
.split-body p{margin-top:16px;color:var(--text);}
.check-list{margin-top:26px;display:grid;gap:14px;}
.check-list li{
  position:relative;
  padding-left:34px;
  font-size:16px;
  color:var(--text);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:7px;
  width:20px;height:20px;
  border-radius:50%;
  background:var(--ice-soft);
  border:1px solid rgba(18,168,196,.35);
}
.check-list li::after{
  content:"";
  position:absolute;
  left:6px;top:13px;
  width:8px;height:4px;
  border-left:2px solid var(--ice-deep);
  border-bottom:2px solid var(--ice-deep);
  transform:rotate(-45deg);
}
.link-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:30px;
  font-size:15.5px;
  font-weight:600;
  color:var(--ice-deep);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:3px;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.link-cta span{transition:transform .24s var(--ease);display:inline-block;}
.link-cta:hover{color:var(--ice);border-bottom-color:var(--ice);}
.link-cta:hover span{transform:translateX(4px);}

/* 服务通道列表 */
.channel-list{display:grid;gap:16px;}
.channel{
  display:grid;
  grid-template-columns:72px 1fr 40px;
  align-items:center;
  gap:24px;
  padding:26px 28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  text-decoration:none;
  color:inherit;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.channel:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:rgba(18,168,196,.4);
  color:inherit;
}
.channel-num{
  font-size:26px;
  font-weight:800;
  color:var(--ice);
  letter-spacing:-1px;
  line-height:1;
}
.channel h3{font-size:19px;margin-bottom:6px;}
.channel p{color:var(--muted);font-size:15px;line-height:1.75;margin:0;}
.channel-arrow{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--ice-soft);
  color:var(--ice-deep);
  font-size:17px;
  transition:transform .26s var(--ease),background .26s var(--ease),color .26s var(--ease);
}
.channel:hover .channel-arrow{
  transform:translateX(5px);
  background:var(--grad);
  color:#fff;
}

/* 流程步骤 */
.step-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  counter-reset:step;
}
.step{
  position:relative;
  padding:30px 24px 28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:46px;height:46px;
  padding:0 10px;
  border-radius:12px;
  background:var(--ice-soft);
  border:1px solid rgba(18,168,196,.3);
  color:var(--ice-deep);
  font-size:17px;
  font-weight:800;
  letter-spacing:.5px;
  margin-bottom:18px;
}
.step h3{font-size:17.5px;margin-bottom:8px;}
.step p{font-size:14.8px;color:var(--muted);line-height:1.8;margin:0;}
.step-line{
  position:absolute;
  top:52px;right:-14px;
  width:28px;height:2px;
  background:linear-gradient(90deg,rgba(18,168,196,.5),rgba(18,168,196,0));
  display:block;
}
.step:last-child .step-line{display:none;}

/* 表单区 */
.support-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 372px;
  gap:36px;
  align-items:start;
}
.form-wrap{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:40px;
}
.form-wrap > p{margin-top:14px;color:var(--muted);font-size:15.5px;}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  margin-top:30px;
}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.4px;}
.field input,
.field select,
.field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#FBFDFE;
  padding:0 16px;
  height:48px;
  font-size:15.5px;
  color:var(--ink);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.field textarea{
  height:auto;
  min-height:132px;
  padding:14px 16px;
  line-height:1.75;
  resize:vertical;
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ice-deep) 50%),linear-gradient(135deg,var(--ice-deep) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:44px;}
.field input::placeholder,
.field textarea::placeholder{color:#9BAAB4;}
.field input:hover,
.field select:hover,
.field textarea:hover{border-color:#BFD3DC;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--ice);
  background:#fff;
  box-shadow:0 0 0 3px rgba(18,168,196,.16);
}
.field.has-error input,
.field.has-error textarea{border-color:var(--danger);box-shadow:0 0 0 3px rgba(217,58,43,.12);}
.field-error{font-size:12px;color:var(--danger);display:none;}
.field.has-error .field-error{display:block;}
.form-actions{
  grid-column:1 / -1;
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
  margin-top:6px;
}
.form-actions .btn{min-width:180px;}
.form-note{font-size:12.5px;color:var(--muted);line-height:1.7;max-width:420px;}
.form-alert{
  grid-column:1 / -1;
  display:none;
  padding:14px 18px;
  border-radius:var(--r-sm);
  background:#E9F9F2;
  border:1px solid rgba(44,175,132,.35);
  color:#1C7A57;
  font-size:14.5px;
  font-weight:600;
}
.form-alert.is-visible{display:block;}

.info-card{
  position:sticky;
  top:96px;
  background:var(--grad);
  border-radius:var(--r-lg);
  color:#fff;
  padding:34px 30px;
  box-shadow:0 20px 44px rgba(11,122,144,.24);
  overflow:hidden;
}
.info-card::before{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:180px;height:180px;
  border-radius:50%;
  background:rgba(255,255,255,.14);
}
.info-card h3{
  color:#fff;
  font-size:20px;
  position:relative;
  margin-bottom:8px;
}
.info-card > p{
  position:relative;
  font-size:14.5px;
  color:rgba(255,255,255,.86);
  margin-bottom:24px;
}
.info-list{position:relative;display:grid;gap:18px;}
.info-list li{
  padding-bottom:18px;
  border-bottom:1px solid rgba(255,255,255,.22);
}
.info-list li:last-child{border-bottom:0;padding-bottom:0;}
.info-list dt{
  font-size:12.5px;
  letter-spacing:1.4px;
  color:rgba(255,255,255,.72);
  margin-bottom:6px;
}
.info-list dd{
  margin:0;
  font-size:15px;
  font-weight:600;
  line-height:1.7;
  color:#fff;
}
.info-card .btn{
  position:relative;
  margin-top:26px;
  width:100%;
  background:#fff;
  color:var(--ice-deep);
  box-shadow:0 10px 22px rgba(6,44,54,.2);
}
.info-card .btn:hover{background:#F2FCFA;color:var(--ice-deep);transform:translateY(-2px);}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:920px;margin:0 auto;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.faq-item[open]{border-color:rgba(18,168,196,.42);box-shadow:0 10px 28px rgba(18,168,196,.12);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:60px;
  padding:16px 24px;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--ice-deep);background:#FAFDFE;}
.faq-icon{
  flex:none;
  position:relative;
  width:26px;height:26px;
  border-radius:50%;
  border:1px solid rgba(18,168,196,.42);
  background:var(--ice-soft);
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--ice-deep);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:2px;}
.faq-icon::after{width:2px;height:11px;transition:opacity .2s var(--ease);}
.faq-item[open] .faq-icon{transform:rotate(180deg);background:var(--grad);border-color:transparent;}
.faq-item[open] .faq-icon::before,
.faq-item[open] .faq-icon::after{background:#fff;}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-body{
  padding:2px 24px 24px;
  background:#F7FBFC;
  border-top:1px solid rgba(18,168,196,.16);
  box-shadow:inset 0 8px 16px -12px rgba(14,23,32,.2);
  font-size:15.8px;
  color:var(--text);
  line-height:1.85;
}
.faq-body p{padding-top:16px;}

/* 底部转化条 */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:76px 0;
  color:#fff;
  background-image:
    linear-gradient(115deg,rgba(11,40,52,.7),rgba(11,40,52,.42)),
    linear-gradient(135deg,rgba(11,122,144,.9) 0%,rgba(18,168,196,.76) 52%,rgba(102,220,192,.66) 100%),
    url("/assets/images/backpic/back-3.png");
  background-size:cover,cover,cover;
  background-position:center,center,center;
}
.cta-band .container{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(23px,2.4vw,30px);max-width:620px;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.88);font-size:16px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  font-size:14.5px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:var(--grad);
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:44px;
  padding-bottom:52px;
}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand p{line-height:1.85;color:rgba(255,255,255,.66);max-width:340px;}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:1.2px;
  margin-bottom:18px;
}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{
  color:rgba(255,255,255,.72);
  text-decoration:none;
  font-size:14.5px;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.footer-col a:hover{color:#fff;padding-left:4px;}
.footer-col address{
  font-style:normal;
  line-height:1.95;
  color:rgba(255,255,255,.68);
}
.footer-col address strong{
  display:block;
  color:#fff;
  font-size:14.5px;
  margin-bottom:6px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;
  color:rgba(255,255,255,.56);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;
  right:26px;
  bottom:30px;
  z-index:110;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 24px;
  border-radius:var(--r-pill);
  background:var(--grad);
  color:#fff;
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 14px 32px rgba(11,122,144,.36);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.float-cta:hover{color:#fff;transform:translateY(-3px);box-shadow:0 18px 40px rgba(11,122,144,.44);}
.float-cta:active{transform:scale(.98);}
.to-top{
  position:fixed;
  right:26px;
  bottom:96px;
  z-index:109;
  width:46px;height:46px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ice-deep);
  font-size:18px;
  box-shadow:var(--sh-1);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease),box-shadow .26s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{box-shadow:var(--sh-2);color:var(--ice);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding-left:26px;padding-right:26px;}
  .split{gap:40px;}
  .step-grid{grid-template-columns:repeat(2,1fr);}
  .step-line{display:none;}
}
@media (max-width:1023px){
  .site-header{height:68px;}
  .main-nav{gap:18px;}
  .main-nav a{font-size:14px;}
  .section{padding:72px 0;}
  .page-hero{padding:150px 0 70px;}
  .split{grid-template-columns:1fr;gap:34px;}
  .split-media{aspect-ratio:16/10;}
  .support-grid{grid-template-columns:1fr;}
  .info-card{position:static;}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:900px){
  .nav-toggle{display:block;}
  .header-actions .btn-outline-light{display:none;}
  .main-nav{
    position:fixed;
    top:0;right:0;
    width:min(340px,86vw);
    height:100vh;
    height:100svh;
    padding:96px 28px 32px;
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
    background:rgba(255,255,255,.96);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    backdrop-filter:blur(18px) saturate(140%);
    border-left:1px solid var(--line);
    box-shadow:-18px 0 48px rgba(11,40,52,.18);
    transform:translateX(102%);
    transition:transform .32s var(--ease);
    overflow-y:auto;
    color:var(--ink);
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav a{
    width:100%;
    font-size:17px;
    padding:16px 0;
    border-bottom:1px solid var(--line);
    color:var(--ink);
    opacity:1;
  }
  .main-nav a::after{display:none;}
  .main-nav a.active{color:var(--ice-deep);}
  .nav-toggle{z-index:130;}
  .site-header.is-scrolled .nav-toggle,
  .nav-toggle{border-color:rgba(255,255,255,.4);}
  .nav-toggle.is-open{border-color:var(--line);background:var(--soft);color:var(--ink);}
}
@media (max-width:767px){
  body{font-size:16px;padding-bottom:0;}
  .container{padding-left:18px;padding-right:18px;}
  .logo-text strong{font-size:17px;}
  .logo-text em{font-size:10.5px;letter-spacing:2px;}
  .logo-mark{width:32px;height:32px;}
  .page-hero{padding:130px 0 56px;}
  .page-hero h1{font-size:30px;letter-spacing:-.3px;}
  .hero-lead{font-size:16px;margin-top:14px;}
  .hero-meta{gap:8px;margin-top:26px;}
  .meta-chip{padding:8px 14px;font-size:12.5px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:30px;}
  .section-head p{font-size:15.5px;}
  h2{font-size:24px;}
  .form-wrap{padding:26px 20px;border-radius:var(--r-md);}
  .form-grid{grid-template-columns:1fr;gap:16px;margin-top:22px;}
  .form-actions .btn{width:100%;}
  .channel{grid-template-columns:1fr 36px;gap:14px;padding:22px 20px;}
  .channel-num{grid-column:1 / -1;font-size:22px;}
  .step-grid{grid-template-columns:1fr;}
  .info-card{padding:28px 22px;}
  .faq-item summary{font-size:15.8px;padding:14px 18px;min-height:56px;}
  .faq-body{padding:2px 18px 20px;font-size:15px;}
  .cta-band{padding:54px 0;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:30px;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;font-size:12.5px;}
  .float-cta{
    right:0;left:0;bottom:0;
    border-radius:0;
    justify-content:center;
    padding:0;
    height:56px;
    padding-bottom:env(safe-area-inset-bottom);
    font-size:15.5px;
    box-shadow:0 -8px 24px rgba(11,122,144,.24);
  }
  .float-cta:hover{transform:none;}
  .to-top{right:16px;bottom:74px;width:42px;height:42px;}
  .site-footer{padding-bottom:56px;}
}
@media (max-width:480px){
  .page-hero h1{font-size:26px;}
  .hero-lead{font-size:15px;}
  .btn{padding:12px 20px;font-size:15px;}
  .channel h3{font-size:17px;}
  .step-num{min-width:42px;height:42px;font-size:15px;}
}