/* roulang page: index */
:root{--ink:#17283a;--muted:#66778a;--blue:#2467a5;--blue-dark:#174a79;--blue-pale:#eaf3fb;--mint:#e4f4ed;--green:#287858;--paper:#fff;--bg:#f5f8fc;--line:#dce5ee;--shadow:0 8px 24px rgba(25,53,79,.07);--radius:10px;--container:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;width:100%;height:auto}
.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:8px;padding:10px;background:#fff;z-index:100}
.skip-link:focus{left:8px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.nav-wrap{min-height:72px;display:flex;align-items:center;gap:30px}
.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:16px;white-space:nowrap}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:9px;background:var(--blue);color:#fff;font-size:16px}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-links a{color:#4b5e72;font-size:14px;padding:10px 0;transition:color .18s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--blue)}
.nav-links a:focus-visible,.btn:focus-visible,.menu-toggle:focus-visible,summary:focus-visible{outline:3px solid #84b6df;outline-offset:3px}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:7px;width:42px;height:42px;color:var(--ink);font-size:20px}
.hero{padding:38px 0 22px}
.hero-art{position:relative;min-height:428px;overflow:hidden;border-radius:12px;background:#1c3448 url("https://images.unsplash.com/photo-1478720568477-152d9b164e26?auto=format&fit=crop&w=1800&q=85") center 48%/cover;color:#fff}
.hero-art:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,28,44,.88) 0%,rgba(11,28,44,.62) 46%,rgba(11,28,44,.13) 100%)}
.hero-copy{position:relative;z-index:1;max-width:700px;padding:56px 62px 42px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#d9e9f7;font-size:13px;font-weight:650}
.live-dot{width:8px;height:8px;background:#79d4a6;border-radius:50%}
.hero h1{font-size:42px;line-height:1.2;margin:17px 0 8px;color:#fff}
.hero h1 span{color:#a9d5f7}
.hero-subtitle{margin:0 0 13px;font-size:18px;color:#e4edf5}
.hero-description{max-width:640px;margin:0;color:#d3e0ea}
.hero-actions{display:flex;gap:12px;margin-top:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:1px solid transparent;border-radius:7px;font-weight:650;transition:background .18s,border-color .18s,color .18s,transform .18s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-light{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.55);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.23)}
.hero-meta{display:flex;gap:22px;margin-top:23px;color:#e4edf5;font-size:13px}
.section{padding:66px 0}
.section-white{background:#fff}
.section-soft{background:#eef4f9}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}
.section-head h2{font-size:27px;line-height:1.3;margin:0}
.section-head p{max-width:650px;margin:8px 0 0;color:var(--muted)}
.section-kicker{display:block;margin-bottom:7px;color:var(--blue);font-size:12px;font-weight:750}
.text-link{color:var(--blue-dark);font-weight:650;white-space:nowrap}
.text-link:hover{text-decoration:underline}
.pain-band{padding:22px 0;background:#eaf2f8;border-bottom:1px solid #dce7f0}
.pain-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.pain-row strong{font-size:15px}
.pain-row p{margin:0;color:var(--muted);flex:1;min-width:220px}
.pain-tags{display:flex;gap:8px;flex-wrap:wrap}
.pain-tag,.badge,.genre{display:inline-flex;align-items:center;border-radius:5px;padding:4px 9px;font-size:12px;font-weight:650}
.pain-tag{background:#fff;border:1px solid var(--line);color:#4e6072}
.search-panel{display:flex;gap:10px;align-items:center;margin-top:18px;max-width:640px}
.search-panel input{flex:1;min-width:0;height:46px;border:1px solid #cbd9e5;border-radius:7px;padding:0 14px;background:#fff;color:var(--ink)}
.search-panel input:focus{outline:3px solid #c4dff4;border-color:var(--blue)}
.search-panel button{height:46px;border:0;border-radius:7px;padding:0 19px;background:var(--blue);color:#fff;font-weight:650}
.search-panel button:hover{background:var(--blue-dark)}
.movie-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.movie-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.movie-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(25,53,79,.12)}
.poster{position:relative;aspect-ratio:3/2;overflow:hidden;background:#dce7ef}
.poster img{height:100%;object-fit:cover;transition:transform .35s}
.movie-card:hover .poster img{transform:scale(1.035)}
.badge{position:absolute;top:10px;left:10px;background:rgba(255,255,255,.95);color:var(--blue-dark)}
.movie-info{padding:12px 13px 14px}
.movie-title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.movie-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:7px;color:var(--muted);font-size:12px}
.rating{color:#8b6522;font-weight:750}
.solution-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:54px;align-items:center}
.solution-copy h2{font-size:28px;line-height:1.35;margin:0 0 12px}
.solution-copy p{color:var(--muted);margin:0}
.feature-list{margin:22px 0 0;padding:0;list-style:none;border-top:1px solid var(--line)}
.feature-list li{display:grid;grid-template-columns:42px 1fr;gap:13px;padding:15px 0;border-bottom:1px solid var(--line)}
.feature-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:8px;background:var(--blue-pale);color:var(--blue-dark);font-weight:750}
.feature-list strong{display:block}
.feature-list span:last-child{color:var(--muted);font-size:13px}
.feature-visual{display:grid;grid-template-columns:1.1fr .9fr;gap:12px;align-items:stretch}
.feature-visual img{height:100%;min-height:300px;object-fit:cover;border-radius:9px}
.visual-note{padding:22px;background:#e8f1f8;border-radius:9px;display:flex;flex-direction:column;justify-content:space-between}
.visual-note strong{font-size:20px;line-height:1.4}
.visual-note p{color:var(--muted);font-size:13px;margin:12px 0 0}
.recommend-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:30px;align-items:stretch}
.featured-pick{position:relative;min-height:380px;border-radius:10px;overflow:hidden;background:#25384b}
.featured-pick img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.featured-pick:after{content:"";position:absolute;inset:30% 0 0;background:linear-gradient(transparent,rgba(8,20,33,.85))}
.featured-pick-copy{position:absolute;z-index:1;left:25px;right:25px;bottom:22px;color:#fff}
.featured-pick-copy h3{font-size:25px;margin:0 0 5px}
.featured-pick-copy p{margin:0;color:#e3ebf1}
.pick-list{border-top:1px solid var(--line)}
.pick-item{display:grid;grid-template-columns:40px 1fr auto;gap:12px;align-items:center;padding:15px 0;border-bottom:1px solid var(--line)}
.pick-number{color:#7890a5;font-weight:750}
.pick-item strong{display:block}
.pick-item small{color:var(--muted)}
.pick-score{font-weight:750;color:#8b6522}
.category-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.category-item{padding:22px 18px;border-right:1px solid var(--line);transition:background .18s}
.category-item:last-child{border-right:0}
.category-item:hover{background:#f4f8fb}
.category-item h3{font-size:16px;margin:0 0 8px}
.category-item p{font-size:13px;color:var(--muted);margin:0}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;counter-reset:step}
.step{position:relative;padding:16px 24px 16px 0;border-top:2px solid #c8d8e5}
.step:before{counter-increment:step;content:"0" counter(step);display:grid;place-items:center;width:34px;height:34px;margin-top:-34px;margin-bottom:16px;border-radius:50%;background:var(--blue);color:#fff;font-size:12px;font-weight:750}
.step:not(:last-child):after{content:"→";position:absolute;right:12px;top:14px;color:#7b91a4}
.step h3{font-size:16px;margin:0 0 6px}
.step p{font-size:13px;color:var(--muted);margin:0}
.ranking{border-top:1px solid var(--line)}
.rank-row{display:grid;grid-template-columns:55px minmax(0,1fr) 130px 100px 100px;gap:14px;align-items:center;padding:13px 10px;border-bottom:1px solid var(--line)}
.rank-row:first-child{color:var(--muted);font-size:12px;font-weight:700;background:#f6f9fb}
.rank-no{font-weight:750;color:var(--blue-dark)}
.rank-name{font-weight:650}
.genre{background:var(--blue-pale);color:var(--blue-dark);justify-self:start}
.rank-hot{color:#718195;font-size:13px}
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:9px;box-shadow:var(--shadow)}
.stat{padding:24px;border-right:1px solid var(--line)}
.stat:last-child{border:0}
.stat strong{display:block;font-size:27px;color:var(--blue-dark);line-height:1.2}
.stat span{display:block;color:var(--muted);font-size:13px;margin-top:7px}
.feedback-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.quote{padding:22px 0;border-top:2px solid #a9c7df}
.quote p{margin:0 0 15px;font-size:16px}
.quote cite{font-size:13px;color:var(--muted);font-style:normal}
.scenario-row{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.scenario{padding:22px;border-right:1px solid var(--line)}
.scenario:last-child{border:0}
.scenario h3{margin:0 0 7px;font-size:17px}
.scenario p{margin:0;color:var(--muted);font-size:13px}
.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:9px;overflow:hidden;transition:box-shadow .2s,transform .2s}
.article-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.article-card img{aspect-ratio:16/9;object-fit:cover}
.article-copy{padding:14px}
.article-copy small{color:var(--blue);font-weight:650}
.article-copy h3{margin:7px 0;font-size:16px;line-height:1.5}
.article-copy time{color:var(--muted);font-size:12px}
.guide-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:center}
.guide-image{height:330px;object-fit:cover;border-radius:9px}
.guide-list{margin:0;padding:0;list-style:none}
.guide-list li{position:relative;padding:13px 0 13px 27px;border-bottom:1px solid var(--line)}
.guide-list li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:800}
.guide-list strong{display:block}
.guide-list span{color:var(--muted);font-size:13px}
.faq-list{max-width:880px;border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{position:relative;list-style:none;cursor:pointer;padding:18px 42px 18px 0;font-weight:700}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:5px;top:13px;font-size:23px;color:var(--blue)}
.faq-list details[open] summary:after{content:"−"}
.faq-list details p{margin:0;padding:0 30px 18px 0;color:var(--muted)}
.metric-layout{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.metric-copy h2{font-size:27px;margin:0 0 10px}
.metric-copy p{margin:0;color:var(--muted)}
.bar-list{display:grid;gap:15px}
.bar-item{display:grid;grid-template-columns:110px 1fr 44px;gap:12px;align-items:center;font-size:13px}
.bar-track{height:8px;background:#dce7ef;border-radius:6px;overflow:hidden}
.bar-track span{display:block;height:100%;background:#4e8dbb;border-radius:6px}
.bar-item b{font-size:12px;color:var(--muted);text-align:right}
.cta-band{padding:48px 0;background:#e6f0f7}
.cta-content{display:flex;align-items:center;justify-content:space-between;gap:25px}
.cta-content h2{font-size:26px;margin:0 0 5px}
.cta-content p{margin:0;color:var(--muted)}
.site-footer{padding:46px 0 20px;background:#fff;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:30px}
.footer-brand p{max-width:330px;color:var(--muted);font-size:13px}
.footer-col h3{font-size:14px;margin:0 0 12px}
.footer-col a{display:block;color:var(--muted);font-size:13px;margin:7px 0}
.footer-col a:hover{color:var(--blue)}
.copyright{border-top:1px solid var(--line);padding-top:16px;color:#78899a;font-size:12px;display:flex;justify-content:space-between;gap:12px}
@media(max-width:1023px){
 .container{width:min(100% - 36px,var(--container))}
 .nav-wrap{gap:18px}.nav-links{gap:16px}
 .movie-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
 .category-grid{grid-template-columns:repeat(3,1fr)}
 .category-item:nth-child(3){border-right:0}.category-item:nth-child(n+4){border-top:1px solid var(--line)}
 .recommend-layout{grid-template-columns:1fr 1fr}
 .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
 .footer-brand{grid-column:1/-1}
}
@media(max-width:767px){
 html{scroll-padding-top:72px}
 .container{width:calc(100% - 32px)}
 .nav-wrap{min-height:64px;flex-wrap:wrap;justify-content:space-between;gap:0}
 .brand{font-size:14px}
 .brand-mark{width:34px;height:34px}
 .menu-toggle{display:block}
 .nav-links{display:none;order:3;width:100%;margin:0;padding:8px 0 14px;flex-direction:column;align-items:stretch;gap:0}
 .nav-links.open{display:flex}
 .nav-links a{padding:11px 8px;border-top:1px solid #edf1f4}
 .hero{padding-top:20px}
 .hero-art{min-height:440px;background-position:58% center}
 .hero-art:before{background:linear-gradient(90deg,rgba(11,28,44,.88),rgba(11,28,44,.55))}
 .hero-copy{padding:40px 24px 30px}
 .hero h1{font-size:34px}
 .hero-subtitle{font-size:16px}
 .hero-description{font-size:14px}
 .hero-meta{gap:12px;flex-wrap:wrap}
 .section{padding:48px 0}
 .section-head{display:block}
 .section-head h2{font-size:23px}
 .section-head .text-link{display:inline-block;margin-top:12px}
 .pain-row{gap:11px}
 .pain-row p{flex-basis:100%}
 .search-panel{width:100%}
 .movie-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
 .movie-info{padding:10px}
 .solution-layout,.guide-layout,.metric-layout{grid-template-columns:1fr;gap:25px}
 .feature-visual{min-height:240px}
 .feature-visual img{min-height:240px}
 .recommend-layout{grid-template-columns:1fr}
 .featured-pick{min-height:300px}
 .category-grid{grid-template-columns:repeat(2,1fr)}
 .category-item{border-bottom:1px solid var(--line);padding:17px 13px}
 .category-item:nth-child(3){border-right:1px solid var(--line)}
 .category-item:nth-child(even){border-right:0}
 .category-item:nth-child(n+4){border-top:0}
 .category-item:last-child{grid-column:1/-1}
 .steps{grid-template-columns:repeat(2,1fr);gap:28px 12px}
 .step{padding-right:12px}
 .step:nth-child(2):after{display:none}
 .rank-row{grid-template-columns:32px minmax(0,1fr) 58px 52px;gap:8px;padding:12px 3px}
 .rank-row>:nth-child(4){display:none}
 .rank-row:first-child>:nth-child(4){display:none}
 .rank-row:first-child{font-size:11px}
 .rank-no{font-size:13px}
 .rank-name{font-size:13px}
 .rank-hot{font-size:11px;text-align:right}
 .genre{font-size:10px;padding:3px 6px}
 .stats-strip{grid-template-columns:repeat(2,1fr)}
 .stat{padding:17px;border-bottom:1px solid var(--line)}
 .stat:nth-child(2){border-right:0}
 .stat:nth-child(n+3){border-bottom:0}
 .stat strong{font-size:23px}
 .feedback-grid{grid-template-columns:1fr;gap:0}
 .quote{padding:17px 0}
 .scenario-row{grid-template-columns:1fr}
 .scenario{border-right:0;border-bottom:1px solid var(--line);padding:17px 4px}
 .scenario:last-child{border-bottom:0}
 .article-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
 .article-copy{padding:11px}
 .article-copy h3{font-size:14px}
 .guide-image{height:240px}
 .metric-layout{gap:28px}
 .bar-item{grid-template-columns:86px 1fr 38px;gap:8px}
 .cta-content{align-items:flex-start;flex-direction:column}
 .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
 .footer-brand{grid-column:1/-1}
 .copyright{display:block}
 .copyright span{display:block;margin-top:5px}
}
@media(max-width:520px){
 .hero-art{min-height:466px}
 .hero-copy{padding:34px 19px 25px}
 .hero h1{font-size:31px}
 .hero-actions{flex-direction:column;align-items:stretch}
 .btn{min-height:46px}
 .movie-grid{gap:9px}
 .movie-meta{font-size:11px}
 .section-head p{font-size:14px}
 .feature-visual{grid-template-columns:1fr 1fr}
 .visual-note{padding:15px}
 .visual-note strong{font-size:17px}
 .pick-item{grid-template-columns:28px 1fr auto;gap:8px}
 .article-grid{grid-template-columns:1fr}
 .article-card{display:grid;grid-template-columns:115px 1fr}
 .article-card img{height:100%;min-height:110px;aspect-ratio:auto}
 .rank-row{grid-template-columns:28px minmax(0,1fr) 54px 46px}
}
@media(prefers-reduced-motion:reduce){
 *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
}