/* roulang page: index */
:root{
  --ink:#161b24;
  --ink-soft:#4b5563;
  --paper:#f7f8f5;
  --white:#ffffff;
  --night:#11161e;
  --night-2:#1d2631;
  --line:#e2e6e8;
  --teal:#167d72;
  --teal-dark:#075e56;
  --lime:#d8ee70;
  --gold:#e8b84a;
  --coral:#dd6b55;
  --muted:#78818b;
  --radius:8px;
  --shadow:0 12px 34px rgba(20,31,42,.08);
  --shadow-strong:0 18px 45px rgba(5,20,28,.20);
  --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;height:auto}
button,input{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(216,238,112,.9);outline-offset:3px}
.container{width:min(calc(100% - 48px),var(--container));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,248,245,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,230,232,.9)}
.nav-wrap{height:74px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;font-weight:800;font-size:17px;letter-spacing:0}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--teal);color:var(--lime);border-radius:7px;font-size:16px;box-shadow:0 5px 14px rgba(22,125,114,.24)}
.site-nav{display:flex;align-items:center;gap:3px;margin-left:auto}
.site-nav a{padding:8px 11px;color:#46515c;font-size:14px;border-radius:5px;transition:.2s ease}
.site-nav a:hover,.site-nav a.active{color:var(--teal-dark);background:#e9f4f1}
.nav-action{margin-left:9px;padding:9px 15px;border:1px solid var(--teal);border-radius:5px;color:var(--teal-dark);font-weight:700;font-size:13px;transition:.2s ease}
.nav-action:hover{background:var(--teal);color:#fff}
.menu-toggle{display:none;margin-left:auto;border:0;background:transparent;color:var(--ink);font-size:24px;padding:6px}
.hero{min-height:650px;position:relative;isolation:isolate;display:flex;align-items:end;padding:92px 0 78px;background:var(--night);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;background:linear-gradient(90deg,rgba(10,16,22,.96) 3%,rgba(10,16,22,.74) 42%,rgba(10,16,22,.28) 72%,rgba(10,16,22,.64) 100%),url('https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=2000&q=90') center/cover}
.hero::after{content:"";position:absolute;inset:auto 0 0;height:210px;z-index:-1;background:linear-gradient(transparent,var(--night))}
.hero-content{max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:7px;margin-bottom:18px;padding:5px 10px;background:rgba(216,238,112,.14);border:1px solid rgba(216,238,112,.38);border-radius:4px;color:var(--lime);font-size:12px;font-weight:700}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 5px rgba(216,238,112,.15)}
h1,h2,h3,p{margin-top:0}
h1{margin-bottom:16px;font-size:52px;line-height:1.16;letter-spacing:0;font-weight:800}
.hero h1 strong{color:var(--lime);font-weight:800}
.hero-lead{margin:0 0 17px;color:#dfe7e4;font-size:18px;line-height:1.65}
.hero-copy{max-width:690px;margin-bottom:28px;color:#bfc9ca;font-size:15px;line-height:1.9}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:5px;font-weight:800;font-size:14px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--lime);color:#17221f;box-shadow:0 8px 20px rgba(216,238,112,.15)}
.btn-primary:hover{background:#e6f79d}
.btn-ghost{border-color:rgba(255,255,255,.42);background:rgba(255,255,255,.06);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.hero-meta{display:flex;gap:26px;margin-top:34px;padding-top:21px;border-top:1px solid rgba(255,255,255,.18)}
.meta-item b{display:block;color:#fff;font-size:18px;line-height:1.2}
.meta-item span{color:#aab7b7;font-size:12px}
.section{padding:82px 0}
.section-dark{background:var(--night);color:#fff}
.section-soft{background:#edf2ef}
.section-title-row{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}
.section-kicker{margin-bottom:7px;color:var(--teal);font-weight:800;font-size:12px}
.section-dark .section-kicker{color:var(--lime)}
h2{margin:0;font-size:30px;line-height:1.3;letter-spacing:0}
.section-intro{max-width:600px;margin:12px 0 0;color:var(--ink-soft);font-size:14px}
.section-dark .section-intro{color:#b8c5c5}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--teal-dark);font-weight:800;font-size:14px;white-space:nowrap}
.text-link:hover{color:var(--coral)}
.highlight-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
.highlight{min-height:248px;padding:28px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.25s ease}
.highlight:hover{transform:translateY(-5px);box-shadow:0 18px 36px rgba(20,31,42,.13)}
.highlight:first-child{background:var(--teal);border-color:var(--teal);color:#fff}
.icon-box{width:42px;height:42px;display:grid;place-items:center;margin-bottom:40px;border-radius:7px;background:#e7f4f1;color:var(--teal);font-size:20px}
.highlight:first-child .icon-box{background:rgba(216,238,112,.2);color:var(--lime)}
.highlight h3{margin-bottom:10px;font-size:20px;line-height:1.35}
.highlight p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.8}
.highlight:first-child p{color:#d4ece7}
.poster-rail{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}
.poster-card{min-width:0;transition:.22s ease}
.poster-card:hover{transform:translateY(-5px)}
.poster-image{position:relative;aspect-ratio:2/3;overflow:hidden;border-radius:7px;background:#29313a;box-shadow:var(--shadow)}
.poster-image img{height:100%;object-fit:cover;transition:transform .4s ease}
.poster-card:hover img{transform:scale(1.055)}
.poster-image::after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,rgba(8,13,17,.86))}
.poster-status{position:absolute;top:8px;left:8px;z-index:1;padding:2px 6px;border-radius:3px;background:var(--lime);color:#14221f;font-size:10px;font-weight:900;line-height:1.5}
.poster-score{position:absolute;right:7px;bottom:7px;z-index:1;color:#fff;font-size:11px;font-weight:800}
.poster-name{margin:9px 1px 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:800}
.matrix{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #3c4650;border-left:1px solid #3c4650}
.matrix-item{min-height:183px;padding:23px 20px;border-right:1px solid #3c4650;border-bottom:1px solid #3c4650;transition:.2s ease}
.matrix-item:hover{background:#202b36}
.matrix-item span{display:block;margin-bottom:24px;color:var(--lime);font-size:22px}
.matrix-item h3{margin-bottom:7px;font-size:17px}
.matrix-item p{margin:0;color:#b8c4c6;font-size:13px;line-height:1.75}
.category-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.category-tags a{padding:7px 12px;border:1px solid #c9d6d3;border-radius:99px;color:#3b5552;font-size:13px;transition:.2s}
.category-tags a:hover{background:var(--teal);border-color:var(--teal);color:#fff}
.steps-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}
.steps-copy h2{font-size:34px}
.steps-copy p{color:var(--ink-soft);font-size:15px;line-height:1.9}
.stat-stack{display:grid;gap:12px;margin-top:27px}
.stat-line{display:flex;justify-content:space-between;padding-bottom:9px;border-bottom:1px solid var(--line);font-size:14px}
.stat-line b{color:var(--teal-dark)}
.steps{position:relative;display:grid;gap:0}
.step{position:relative;display:grid;grid-template-columns:57px 1fr;gap:18px;padding:0 0 27px}
.step:last-child{padding-bottom:0}
.step:not(:last-child)::before{content:"";position:absolute;top:52px;left:25px;width:1px;height:calc(100% - 28px);background:#b6d4cd}
.step-num{width:51px;height:51px;display:grid;place-items:center;border-radius:50%;background:#dff0eb;color:var(--teal-dark);font-weight:900;font-size:16px}
.step:nth-child(2) .step-num{background:var(--lime)}
.step:nth-child(3) .step-num{background:#f6dfb0;color:#7c5614}
.step h3{margin:5px 0 5px;font-size:18px}
.step p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.75}
.showcase{padding-top:0}
.feature-frame{display:grid;grid-template-columns:1.35fr .65fr;min-height:420px;background:#1d2932;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-strong)}
.feature-visual{position:relative;min-height:390px;background:url('https://images.unsplash.com/photo-1517604931442-7e0c8ed2963c?auto=format&fit=crop&w=1300&q=88') center/cover}
.feature-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,18,23,.06),rgba(9,18,23,.75))}
.feature-caption{position:absolute;left:28px;bottom:25px;z-index:1;max-width:420px;color:#fff}
.feature-caption h3{margin-bottom:7px;font-size:25px}
.feature-caption p{margin:0;color:#d1d9da;font-size:14px}
.feature-side{padding:33px;color:#fff}
.feature-side h3{font-size:22px;line-height:1.4}
.feature-side p{color:#c2cfd0;font-size:14px}
.watch-list{display:grid;gap:12px;margin-top:23px}
.watch-list div{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.16)}
.watch-list b{display:block;color:var(--lime);font-size:13px}
.watch-list span{color:#c5cfd0;font-size:13px}
.testimonial-layout{display:grid;grid-template-columns:.73fr 1.27fr;gap:36px;align-items:start}
.quote-lead{padding:28px;background:#e5efbc;border-left:5px solid var(--teal);border-radius:0 var(--radius) var(--radius) 0}
.quote-lead p{margin:0;color:#26332b;font-size:19px;line-height:1.65;font-weight:700}
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.review{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.review-stars{color:#d39422;letter-spacing:2px;font-size:13px}
.review p{margin:10px 0 13px;color:var(--ink-soft);font-size:14px;line-height:1.8}
.review footer{display:flex;justify-content:space-between;color:#69737d;font-size:12px}
.rank-section{background:#fff}
.rank-layout{display:grid;grid-template-columns:1.18fr .82fr;gap:44px}
.rank-list{border-top:1px solid var(--line)}
.rank-item{display:grid;grid-template-columns:38px 1fr auto auto;align-items:center;gap:12px;padding:13px 4px;border-bottom:1px solid var(--line)}
.rank-no{color:#9ca5a8;font-size:18px;font-weight:900}
.rank-item:nth-child(-n+3) .rank-no{color:var(--coral)}
.rank-name b{display:block;font-size:14px}
.rank-name span{color:#7a858b;font-size:12px}
.rank-tag{padding:3px 7px;border-radius:3px;background:#edf3f1;color:var(--teal-dark);font-size:11px;font-weight:700}
.rank-score{color:#a36b00;font-size:13px;font-weight:900}
.rank-panel{padding:30px;background:var(--teal);color:#fff;border-radius:var(--radius)}
.rank-panel h3{font-size:24px;line-height:1.4}
.rank-panel p{color:#d3ebe5;font-size:14px;line-height:1.85}
.rank-panel ul{padding:0;list-style:none;margin:24px 0}
.rank-panel li{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.2);font-size:14px}
.rank-panel li::before{content:"✓";margin-right:9px;color:var(--lime);font-weight:900}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s ease}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-image{aspect-ratio:1.72;overflow:hidden;background:#d6dcdf}
.news-image img{height:100%;object-fit:cover;transition:.35s ease}
.news-card:hover img{transform:scale(1.05)}
.news-body{padding:17px}
.news-date{color:var(--teal);font-size:12px;font-weight:800}
.news-card h3{margin:7px 0 6px;font-size:17px;line-height:1.5}
.news-card p{margin:0;color:var(--ink-soft);font-size:13px;line-height:1.7}
.trust-strip{padding:32px 0;background:#f1f3ed;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.trust-item{display:flex;align-items:center;gap:12px;padding:5px 10px}
.trust-icon{width:38px;height:38px;display:grid;place-items:center;flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:50%;color:var(--teal);font-size:18px}
.trust-item b{display:block;font-size:14px}
.trust-item span{display:block;color:#758087;font-size:12px}
.faq-wrap{display:grid;grid-template-columns:.72fr 1.28fr;gap:65px;align-items:start}
.faq-intro p{color:var(--ink-soft);font-size:15px;line-height:1.9}
.faq-list{border-top:1px solid var(--line)}
.faq{border-bottom:1px solid var(--line)}
.faq summary{display:flex;justify-content:space-between;gap:20px;padding:18px 0;color:var(--ink);font-weight:800;font-size:16px;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--teal);font-size:22px;font-weight:400;line-height:1}
.faq[open] summary::after{content:"−"}
.faq p{padding:0 35px 18px 0;margin:0;color:var(--ink-soft);font-size:14px;line-height:1.85}
.download-band{padding:62px 0;background:var(--coral);color:#fff}
.download-row{display:flex;align-items:center;justify-content:space-between;gap:30px}
.download-row h2{max-width:650px;font-size:31px}
.download-row p{max-width:660px;margin:10px 0 0;color:#ffebe3;font-size:15px}
.btn-light{background:#fff;color:#a44231}
.btn-light:hover{background:#fff1eb}
.site-footer{padding:58px 0 86px;background:#11161e;color:#fff}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px}
.footer-brand .brand{margin-bottom:15px}
.footer-brand p{max-width:320px;color:#aeb9bb;font-size:13px;line-height:1.85}
.footer-col h3{margin-bottom:14px;color:var(--lime);font-size:14px}
.footer-col a{display:block;margin:8px 0;color:#b9c4c5;font-size:13px;transition:.2s}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:20px;border-top:1px solid #364049;color:#899598;font-size:12px}
.fixed-cta{position:fixed;z-index:40;bottom:15px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:18px;width:min(calc(100% - 32px),590px);padding:9px 10px 9px 17px;background:rgba(17,22,30,.94);border:1px solid rgba(216,238,112,.35);border-radius:7px;box-shadow:0 16px 40px rgba(0,0,0,.28);backdrop-filter:blur(14px);color:#fff}
.fixed-cta p{flex:1;margin:0;font-size:13px;line-height:1.45}
.fixed-cta p b{display:block;color:var(--lime);font-size:14px}
.fixed-cta .btn{min-height:38px;padding:8px 13px;white-space:nowrap}
@media (max-width:1024px){
  .poster-rail{grid-template-columns:repeat(6,1fr)}
  .matrix{grid-template-columns:repeat(3,1fr)}
  .highlight-grid{grid-template-columns:repeat(3,1fr)}
  .site-nav{gap:0}
  .site-nav a{padding:8px}
  .steps-layout,.testimonial-layout,.faq-wrap{gap:35px}
}
@media (max-width:768px){
  .container{width:min(calc(100% - 34px),var(--container))}
  .nav-wrap{height:64px}
  .site-nav,.nav-action{display:none}
  .menu-toggle{display:block}
  .site-header.menu-open .site-nav{position:absolute;top:64px;left:0;right:0;display:flex;flex-direction:column;align-items:stretch;gap:2px;padding:12px 17px 17px;background:#f7f8f5;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .site-header.menu-open .site-nav a{padding:11px}
  .hero{min-height:610px;padding:84px 0 60px}
  h1{font-size:40px}
  .hero-lead{font-size:16px}
  .section{padding:60px 0}
  .section-title-row{display:block}
  .section-title-row .text-link{margin-top:14px}
  h2{font-size:26px}
  .highlight-grid{grid-template-columns:1fr}
  .highlight{min-height:auto;padding:23px}
  .highlight .icon-box{margin-bottom:24px}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .steps-layout,.testimonial-layout,.rank-layout,.faq-wrap{grid-template-columns:1fr}
  .feature-frame{grid-template-columns:1fr}
  .feature-visual{min-height:300px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .footer-brand{grid-column:span 2}
}
@media (max-width:520px){
  .container{width:min(calc(100% - 28px),var(--container))}
  .hero{min-height:650px;padding-top:76px}
  h1{font-size:34px;line-height:1.2}
  .hero-copy{font-size:14px}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:14px}
  .meta-item b{font-size:16px}
  .poster-rail{grid-template-columns:repeat(3,1fr);gap:10px}
  .poster-card:nth-child(n+10){display:none}
  .matrix{grid-template-columns:1fr}
  .matrix-item{min-height:auto}
  .section-intro{font-size:13px}
  .news-grid,.review-grid{grid-template-columns:1fr}
  .rank-item{grid-template-columns:28px 1fr auto;gap:8px}
  .rank-tag{display:none}
  .trust-grid{grid-template-columns:1fr}
  .download-row{display:block}
  .download-row .btn{margin-top:20px;width:100%}
  .footer-grid{grid-template-columns:1fr;gap:21px}
  .footer-brand{grid-column:auto}
  .footer-bottom{display:block;line-height:1.9}
  .feature-side{padding:25px}
  .fixed-cta{bottom:9px;gap:10px;padding:8px 8px 8px 12px}
  .fixed-cta p{font-size:11px}
  .fixed-cta p b{font-size:12px}
  .fixed-cta .btn{font-size:12px;padding:8px 10px}
}