/* roulang page: index */
:root{
  --ink:#182321;--muted:#63716c;--paper:#f3f5f0;--white:#fff;--line:#dce3dc;
  --forest:#183c35;--forest-deep:#112b26;--lime:#d8f36b;--coral:#e46e52;--mint:#e7eee8;
  --shadow:0 12px 30px rgba(25,45,37,.08);--radius:8px;--container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:82px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;line-height:1.65}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;height:100%;object-fit:cover}
button,input{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--coral);outline-offset:3px}
.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(243,245,240,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,227,220,.9)}
.nav-wrap{height:76px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;font-weight:850;font-size:16px}
.brand-mark{width:36px;height:36px;background:var(--forest);color:var(--lime);display:grid;place-items:center;border-radius:7px;font-weight:900;font-size:18px}
.nav-links{display:flex;align-items:center;gap:25px;margin-left:auto}
.nav-links a{font-size:13px;color:#53615c;font-weight:650;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--forest)}
.nav-links a.active{position:relative}
.nav-links a.active:after{content:"";position:absolute;height:2px;left:0;right:0;bottom:-12px;background:var(--coral)}
.nav-search{display:flex;align-items:center;border:1px solid var(--line);background:#fff;border-radius:6px;padding:5px 6px 5px 12px;gap:8px}
.nav-search input{width:118px;min-width:0;border:0;outline:0;background:transparent;font-size:12px}
.nav-search button{border:0;background:var(--forest);color:#fff;border-radius:4px;padding:6px 10px;font-size:12px;cursor:pointer}
.menu-toggle{display:none;background:transparent;border:1px solid var(--line);width:40px;height:38px;border-radius:6px;color:var(--ink);cursor:pointer}
.hero{background:var(--forest-deep);color:#fff;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0 0 0 auto;width:40%;background:linear-gradient(90deg,var(--forest-deep),transparent),url('https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1400&q=85') center 42%/cover;opacity:.42}
.hero-inner{position:relative;min-height:495px;display:flex;align-items:center;padding-block:66px}
.hero-copy{max-width:770px}
.eyebrow{display:flex;align-items:center;gap:9px;color:var(--lime);font-size:12px;font-weight:750;letter-spacing:0}
.live-dot{width:8px;height:8px;background:var(--coral);border-radius:50%;box-shadow:0 0 0 4px rgba(228,110,82,.18)}
.hero h1{font-size:52px;line-height:1.16;margin:18px 0 14px;max-width:700px;font-weight:850}
.hero h1 em{font-style:normal;color:var(--lime)}
.hero-subtitle{font-size:19px;font-weight:700;margin:0 0 12px;color:#e7eee8}
.hero-description{max-width:690px;color:#cad6cf;font-size:14px;margin:0}
.hero-actions{display:flex;gap:11px;margin-top:27px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:5px;font-size:13px;font-weight:750;transition:transform .2s,background .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--lime);color:#17231e}
.btn-primary:hover{background:#e5ff88;box-shadow:0 7px 18px rgba(216,243,107,.18)}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.hero-foot{display:flex;align-items:center;gap:18px;margin-top:36px;color:#b9c8c0;font-size:12px}
.hero-foot strong{color:#fff;font-size:19px;margin-right:5px}
.hero-foot .divider{height:24px;width:1px;background:rgba(255,255,255,.25)}
.section{padding:70px 0}
.section-tight{padding:52px 0}
.section-white{background:#fff}
.section-dark{background:var(--forest);color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-kicker{color:#a45d43;text-transform:uppercase;font-size:10px;font-weight:850;letter-spacing:1px;margin-bottom:7px}
.section-dark .section-kicker{color:var(--lime)}
.section-title{font-size:29px;line-height:1.25;margin:0;font-weight:850}
.section-desc{max-width:650px;color:var(--muted);font-size:13px;margin:9px 0 0}
.section-dark .section-desc{color:#bdcbc4}
.text-link{font-size:12px;font-weight:750;color:var(--forest);white-space:nowrap}
.text-link:hover{color:var(--coral)}
.case-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:24px}
.case-feature{min-height:300px;position:relative;overflow:hidden;border-radius:var(--radius);background:#253b34}
.case-feature img{position:absolute;inset:0;opacity:.76;transition:transform .5s}
.case-feature:hover img{transform:scale(1.04)}
.case-feature:after{content:"";position:absolute;inset:25% 0 0;background:linear-gradient(transparent,rgba(8,20,17,.9))}
.case-copy{position:absolute;z-index:1;left:27px;right:27px;bottom:24px;color:white}
.case-copy h3{font-size:23px;margin:8px 0 5px}
.case-copy p{font-size:13px;color:#e0e8e3;margin:0;max-width:500px}
.pill{display:inline-flex;align-items:center;padding:4px 8px;border-radius:3px;background:var(--lime);color:#1c2b24;font-size:10px;font-weight:850}
.case-side{display:flex;flex-direction:column;justify-content:center;padding:30px;background:#e9eee8;border-left:3px solid var(--coral)}
.case-side .quote-mark{font-size:42px;color:#a9b8ad;line-height:1}
.case-side blockquote{font-size:19px;line-height:1.55;font-weight:700;margin:10px 0 22px}
.case-person{font-size:12px;color:var(--muted)}
.case-person strong{color:var(--ink)}
.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid rgba(255,255,255,.19);border-radius:var(--radius);overflow:hidden}
.metric{padding:24px 26px;border-right:1px solid rgba(255,255,255,.16)}
.metric:last-child{border:0}
.metric strong{display:block;color:var(--lime);font-size:30px;line-height:1.2}
.metric span{font-size:12px;color:#c0cec7}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.compare-panel{padding:24px 26px;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}
.compare-panel.featured{background:#eaf0e9;border-color:#cad8cc}
.compare-panel h3{font-size:15px;margin:0 0 15px}
.compare-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.compare-list li{display:flex;gap:10px;font-size:13px;color:#4e5d56}
.compare-list li:before{content:"+";color:#43836c;font-weight:900}
.compare-panel:not(.featured) .compare-list li:before{content:"–";color:#b56754}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid rgba(255,255,255,.22)}
.step{padding:24px 28px 10px 0;position:relative}
.step+.step{padding-left:28px;border-left:1px solid rgba(255,255,255,.16)}
.step-no{font-size:11px;color:var(--lime);font-weight:850}
.step h3{font-size:17px;margin:10px 0 8px}
.step p{font-size:13px;color:#bfccc5;margin:0}
.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:transform .2s,box-shadow .2s}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.news-image{height:168px;background:#dfe8df;overflow:hidden}
.news-image img{transition:transform .4s}
.news-card:hover .news-image img{transform:scale(1.04)}
.news-body{padding:17px 18px 19px}
.news-date{font-size:10px;color:#9a6755;font-weight:800}
.news-body h3{font-size:15px;line-height:1.5;margin:7px 0}
.news-body p{font-size:12px;color:var(--muted);margin:0}
.objection-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.objection{padding:22px 23px 22px 0}
.objection+.objection{padding-left:23px;border-left:1px solid var(--line)}
.objection h3{font-size:15px;margin:0 0 8px}
.objection p{font-size:12px;line-height:1.8;color:var(--muted);margin:0}
.content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .22s,box-shadow .22s}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.poster{aspect-ratio:4/3;position:relative;background:#dfe7df;overflow:hidden}
.poster img{transition:transform .4s}
.video-card:hover .poster img{transform:scale(1.04)}
.badge{position:absolute;left:10px;top:10px;background:var(--forest);color:#fff;border-radius:3px;padding:4px 7px;font-size:10px;font-weight:750}
.rating{position:absolute;right:10px;bottom:10px;color:#fff;font-size:11px;font-weight:850;text-shadow:0 1px 5px #000}
.video-info{padding:13px 14px 15px}
.video-title-row{display:flex;align-items:center;justify-content:space-between;gap:8px}
.video-title{font-size:14px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-type{font-size:10px;color:#7c8983;white-space:nowrap}
.video-info p{margin:7px 0 0;color:var(--muted);font-size:11px;line-height:1.65}
.category-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center}
.category-intro{max-width:440px}
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.category-item{min-height:105px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:6px;transition:border-color .2s,transform .2s}
.category-item:hover{border-color:#92a99a;transform:translateY(-2px)}
.category-item strong{display:block;font-size:15px;margin-bottom:4px}
.category-item span{font-size:11px;color:var(--muted);line-height:1.55;display:block}
.rank-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px}
.rank-note{align-self:start;padding-top:8px}
.rank-list{list-style:none;padding:0;margin:0;border-top:1px solid rgba(255,255,255,.18)}
.rank-row{display:grid;grid-template-columns:38px 1fr 90px 50px 54px;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.13);font-size:12px}
.rank-no{font-weight:900;color:#81938a}
.rank-row:nth-child(-n+3) .rank-no{color:var(--lime);font-size:15px}
.rank-name{font-weight:750}
.rank-heat,.rank-rating{color:#c4d0c9}
.rank-tag{justify-self:end;padding:3px 7px;border:1px solid rgba(255,255,255,.22);border-radius:3px;color:#cad5cf;font-size:10px}
.topic-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.topic{background:#fff;padding:21px 20px}
.topic span{color:#b16d50;font-size:10px;font-weight:850}
.topic h3{font-size:16px;margin:8px 0 5px}
.topic p{font-size:11px;color:var(--muted);line-height:1.7;margin:0}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.timeline:before{content:"";position:absolute;top:8px;left:6px;right:6px;height:1px;background:#cbd7cc}
.timeline-item{position:relative;padding-top:24px}
.timeline-item:before{content:"";position:absolute;top:3px;left:0;width:10px;height:10px;border-radius:50%;background:var(--coral);border:3px solid var(--paper)}
.timeline-item time{font-size:10px;color:#a15f48;font-weight:850}
.timeline-item h3{font-size:14px;margin:7px 0}
.timeline-item p{font-size:11px;color:var(--muted);margin:0;line-height:1.7}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;border-top:1px solid var(--line)}
.faq-item{padding:18px 0;border-bottom:1px solid var(--line)}
.faq-item h3{font-size:14px;margin:0 0 7px}
.faq-item p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}
.contact-band{background:var(--coral);color:#fff;padding:48px 0}
.contact-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.contact-inner h2{font-size:25px;margin:0 0 6px}
.contact-inner p{font-size:13px;color:#fff0eb;margin:0}
.contact-inner .btn{background:var(--ink);color:#fff;flex-shrink:0}
.site-footer{background:#111b19;color:#dce5df;padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:34px;padding-bottom:34px}
.footer-brand{font-size:16px;font-weight:850;display:flex;align-items:center;gap:10px}
.footer-about p{max-width:300px;color:#9eaea5;font-size:12px;margin:14px 0 0}
.footer-col h3{font-size:12px;color:#fff;margin:2px 0 13px}
.footer-col a{display:block;color:#9eaea5;font-size:12px;margin:8px 0;transition:color .2s}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#82938a;font-size:10px}
@media(max-width:1024px){
  .nav-wrap{gap:18px}.nav-links{gap:15px}.nav-search input{width:85px}
  .content-grid{grid-template-columns:repeat(3,1fr)}
  .category-layout,.rank-layout{gap:30px}
}
@media(max-width:768px){
  .container{width:min(100% - 36px,var(--container))}
  .nav-wrap{height:68px}.menu-toggle{display:block;margin-left:auto}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;margin:0;padding:14px 20px 18px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-wrap:wrap;gap:12px 20px}
  .nav-links.open{display:flex}.nav-links a.active:after{bottom:-4px}
  .nav-search{display:none}
  .hero-inner{min-height:450px;padding-block:55px}
  .hero:before{width:70%;opacity:.28}
  .hero h1{font-size:42px}
  .section{padding:56px 0}.section-tight{padding:44px 0}
  .section-head{align-items:flex-start}
  .case-grid,.category-layout,.rank-layout{grid-template-columns:1fr}
  .case-feature{min-height:265px}
  .case-side{padding:22px}
  .metric{padding:20px 15px}
  .metric strong{font-size:25px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .content-grid{grid-template-columns:repeat(2,1fr)}
  .topic-row{grid-template-columns:repeat(2,1fr)}
  .rank-note{max-width:550px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .container{width:calc(100% - 30px)}
  .brand{font-size:13px;gap:8px}.brand-mark{width:32px;height:32px}
  .hero-inner{min-height:470px;padding-block:46px}
  .hero h1{font-size:36px}
  .hero-subtitle{font-size:16px}
  .hero-description{font-size:13px}
  .hero-actions{flex-wrap:wrap}
  .hero-foot{gap:11px;flex-wrap:wrap}
  .hero-foot strong{font-size:16px}
  .section-title{font-size:24px}
  .section-head{display:block}.section-head .text-link{display:inline-block;margin-top:12px}
  .metric-strip{grid-template-columns:1fr 1fr}
  .metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.16)}
  .compare{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step,.step+.step{padding:18px 0;border-left:0;border-bottom:1px solid rgba(255,255,255,.15)}
  .step:last-child{border-bottom:0}
  .news-grid{grid-template-columns:1fr}
  .news-image{height:190px}
  .objection-grid{grid-template-columns:1fr}
  .objection,.objection+.objection{padding:18px 0;border-left:0;border-bottom:1px solid var(--line)}
  .objection:last-child{border-bottom:0}
  .content-grid{gap:10px}
  .video-info{padding:11px}
  .video-title{font-size:12px}
  .video-info p{font-size:10px}
  .category-grid{gap:8px}
  .category-item{padding:13px;min-height:100px}
  .rank-row{grid-template-columns:30px 1fr 65px 38px}
  .rank-tag{display:none}
  .topic-row{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr 1fr;row-gap:24px}
  .timeline:before{display:none}
  .faq-grid{grid-template-columns:1fr}
  .contact-inner{align-items:flex-start;flex-direction:column}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px 16px}
  .footer-about{grid-column:1/-1}
  .footer-bottom{flex-direction:column;gap:7px}
}