/* roulang page: index */
:root{--ink:#242326;--muted:#777477;--paper:#f7f5f2;--white:#fff;--line:#e8e3de;--coral:#d65343;--coral-dark:#b83d31;--plum:#302732;--teal:#4e8179;--mint:#e7f0ed;--gold:#bc8950;--radius:9px;--shadow:0 10px 30px rgba(43,31,29,.07);--max:1216px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;width:100%;height:100%;object-fit:cover}.container{width:min(var(--max),calc(100% - 64px));margin-inline:auto}.site-header{height:74px;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{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:18px;white-space:nowrap}.brand-mark{width:38px;height:38px;border-radius:8px;background:var(--coral);display:grid;place-items:center;color:#fff}.brand-mark svg{width:17px;height:17px}.nav-links{display:flex;align-items:center;gap:6px}.nav-links a{padding:10px 12px;border-radius:6px;font-size:13px;color:#5f5a5c;transition:background .2s,color .2s}.nav-links a:hover,.nav-links a.active{color:var(--coral-dark);background:#fbefec}.menu-toggle{display:none;border:1px solid var(--line);border-radius:7px;background:#fff;width:44px;height:44px;color:var(--ink);cursor:pointer}.hero{padding:34px 0 24px}.hero-stage{min-height:450px;position:relative;overflow:hidden;border-radius:10px;background:#352c31;isolation:isolate}.hero-stage:before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(28,23,27,.89) 0%,rgba(28,23,27,.68) 42%,rgba(28,23,27,.10) 100%),url('https://images.unsplash.com/photo-1470770841072-f978cf4d019e?auto=format&fit=crop&w=1800&q=85') center 48%/cover}.hero-content{max-width:680px;padding:66px 7.2%;color:#fff}.eyebrow{display:inline-flex;align-items:center;gap:9px;color:#f3c1ad;font-size:12px;font-weight:700;letter-spacing:0}.eyebrow:before{content:"";width:23px;height:2px;background:var(--coral)}h1{margin:15px 0 8px;font-size:46px;line-height:1.2;font-weight:760}.hero-highlight{color:#ffb29b}.hero-subtitle{margin:0;color:#f2e9e6;font-size:17px}.hero-copy{max-width:565px;margin:17px 0 23px;color:#ded5d3;font-size:14px;line-height:1.9}.button-row{display:flex;gap:11px;flex-wrap:wrap}.btn{min-height:45px;display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:0 17px;border-radius:7px;border:1px solid transparent;font-size:13px;font-weight:700;transition:transform .2s,background .2s,border-color .2s,box-shadow .2s}.btn:hover{transform:translateY(-2px)}.btn:focus-visible,.menu-toggle:focus-visible,.faq summary:focus-visible{outline:3px solid #e78b79;outline-offset:3px}.btn-primary{background:var(--coral);color:#fff}.btn-primary:hover{background:var(--coral-dark);box-shadow:0 6px 18px #20151855}.btn-ghost{border-color:#ffffff80;color:#fff;background:#ffffff0d}.btn-ghost:hover{background:#ffffff20}.hero-meta{display:flex;gap:22px;margin-top:29px;color:#f2e6e3;font-size:12px}.hero-meta strong{color:#fff;font-size:16px;margin-right:5px}.section{padding:62px 0;border-bottom:1px solid var(--line)}.section-white{background:#fff}.section-dark{background:var(--plum);color:#fff;border:0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:25px}.section-kicker{margin:0 0 5px;color:var(--coral);font-size:11px;font-weight:800;text-transform:uppercase}.section h2{margin:0;font-size:27px;line-height:1.3}.section-intro{max-width:640px;margin:9px 0 0;color:var(--muted);font-size:13px}.section-dark .section-intro{color:#c9bec7}.text-link{font-size:13px;font-weight:700;color:var(--coral-dark);white-space:nowrap}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.pain-row{display:grid;grid-template-columns:repeat(4,1fr);border-block:1px solid var(--line)}.pain-item{padding:23px 20px;border-right:1px solid var(--line);display:flex;gap:13px;align-items:flex-start}.pain-item:last-child{border:0}.pain-no{color:var(--coral);font-weight:800;font-size:12px}.pain-item strong{display:block;font-size:14px}.pain-item span{display:block;color:var(--muted);font-size:12px;margin-top:4px}.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.solution{min-height:142px;padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.solution-icon{width:34px;height:34px;background:#f9e9e5;color:var(--coral);display:grid;place-items:center;border-radius:7px;margin-bottom:12px}.solution-icon svg{width:17px}.solution h3{font-size:15px;margin:0 0 5px}.solution p{margin:0;font-size:12px;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}.step{position:relative;border-top:2px solid #d8d0ca;padding-top:16px}.step:before{counter-increment:step;content:"0" counter(step);font-size:11px;font-weight:800;color:var(--coral)}.step h3{font-size:14px;margin:8px 0 4px}.step p{font-size:12px;color:var(--muted);margin:0}.video-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px 17px}.video-card{min-width:0}.poster{position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:7px;background:#e4ddd7}.poster img{transition:transform .22s}.video-card:hover .poster img,.feature-poster:hover img{transform:scale(1.045)}.badge{position:absolute;top:9px;left:9px;padding:4px 7px;border-radius:4px;background:#f1e9dc;color:#785c36;font-size:10px;font-weight:750}.badge.hd{background:#e4f0eb;color:#326c5a}.badge.update{background:#fbe8e3;color:#ae4738}.play-dot{position:absolute;right:10px;bottom:10px;width:32px;height:32px;border-radius:50%;background:#242326c9;color:#fff;display:grid;place-items:center;opacity:0;transform:scale(.92);transition:.2s}.video-card:hover .play-dot{opacity:1;transform:scale(1)}.play-dot svg{width:13px}.card-info{display:flex;justify-content:space-between;align-items:flex-start;gap:8px;padding-top:10px}.card-info h3{font-size:13px;margin:0;font-weight:700;line-height:1.45}.rating{white-space:nowrap;color:#b17b35;font-weight:750;font-size:12px}.rating:before{content:"★ ";font-size:11px}.hot-layout{display:grid;grid-template-columns:1.03fr 1fr;gap:30px}.feature-card{position:relative;min-height:370px;overflow:hidden;border-radius:8px;background:#514343}.feature-poster{position:absolute;inset:0}.feature-poster img{transition:transform .22s}.feature-card:after{content:"";position:absolute;inset:30% 0 0;background:linear-gradient(transparent,#1c1718e8)}.feature-copy{position:absolute;z-index:1;bottom:23px;left:24px;right:24px;color:#fff}.feature-copy h3{font-size:21px;margin:8px 0}.feature-copy p{margin:0;color:#e5dad8;font-size:12px}.hot-side{display:grid;grid-template-columns:1fr 1fr;gap:17px 13px}.hot-mini{display:grid;grid-template-columns:86px 1fr;gap:11px;align-items:center;min-width:0}.hot-mini img{aspect-ratio:1/1.12;border-radius:6px}.hot-mini h3{margin:0 0 5px;font-size:13px}.hot-mini p{margin:0;color:var(--muted);font-size:11px}.hot-mini .rating{display:block;margin-top:6px}.channel-list{border-top:1px solid var(--line)}.channel{display:grid;grid-template-columns:60px 1.1fr 2fr 90px;align-items:center;gap:20px;padding:18px 10px;border-bottom:1px solid var(--line);transition:background .18s}.channel:hover{background:#f9f4f1}.channel-index{font-size:12px;color:var(--coral);font-weight:800}.channel h3{margin:0;font-size:15px}.channel p{margin:0;color:var(--muted);font-size:12px}.channel-count{text-align:right;color:var(--teal);font-size:12px;font-weight:700}.rank-list{border-top:1px solid #ffffff2b}.rank-row{display:grid;grid-template-columns:76px minmax(200px,1.6fr) 1fr 90px 120px;align-items:center;gap:15px;padding:13px 10px;border-bottom:1px solid #ffffff20;font-size:12px}.rank-row.header{color:#bdb2bc;font-size:10px;text-transform:uppercase}.rank-no{font-size:15px;font-weight:800;color:#d6cbd3}.rank-row:nth-child(2) .rank-no{color:#ffc46e}.rank-row:nth-child(3) .rank-no{color:#d7dce2}.rank-row:nth-child(4) .rank-no{color:#d99773}.rank-title{font-size:13px;font-weight:700}.rank-category{justify-self:start;border:1px solid #ffffff35;color:#dfd3dc;border-radius:4px;padding:3px 7px;font-size:10px}.heat{display:flex;align-items:center;gap:9px;color:#ded3dc}.heat i{height:4px;width:64px;background:#ffffff28;border-radius:4px;overflow:hidden}.heat i:after{content:"";display:block;height:100%;width:72%;background:#d9755f;border-radius:4px}.rank-score{color:#f0bc70;font-weight:750}.stats-band{background:#f0e8e3}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.stat{padding:17px 20px;border-left:1px solid #d8cec7}.stat:first-child{border:0}.stat strong{font-size:27px;line-height:1.1;color:var(--plum)}.stat span{display:block;font-size:12px;color:var(--muted);margin-top:5px}.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.quote{padding:19px 0 0;border-top:2px solid var(--teal)}.quote blockquote{margin:0;font-size:14px;line-height:1.8}.quote cite{display:flex;gap:10px;align-items:center;margin-top:15px;color:var(--muted);font-size:12px;font-style:normal}.avatar{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--mint);color:var(--teal);font-weight:800}.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.audience{background:#fff;padding:19px}.audience h3{font-size:14px;margin:0 0 7px}.audience p{margin:0;font-size:12px;color:var(--muted)}.news-list{display:grid;grid-template-columns:1fr 1fr;column-gap:34px}.news-item{display:grid;grid-template-columns:112px 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.news-thumb{aspect-ratio:4/3;overflow:hidden;border-radius:5px;background:#e8e1dc}.news-thumb img{transition:transform .2s}.news-item:hover img{transform:scale(1.04)}.news-meta{display:flex;gap:10px;align-items:center;font-size:10px;color:var(--muted)}.news-tag{color:var(--coral-dark);font-weight:700}.news-item h3{margin:6px 0 0;font-size:13px;line-height:1.55}.metric-table{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{padding:15px 16px;border:1px solid #ffffff24;border-radius:7px}.metric-label{font-size:11px;color:#c9bec7}.metric-value{margin-top:7px;font-size:19px;font-weight:750}.metric-note{font-size:10px;color:#e5a48f;margin-top:3px}.faq-list{border-top:1px solid var(--line)}.faq{border-bottom:1px solid var(--line)}.faq summary{min-height:58px;display:flex;align-items:center;justify-content:space-between;gap:18px;cursor:pointer;list-style:none;font-weight:700;font-size:14px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";width:25px;height:25px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--coral);font-size:17px;flex:none}.faq[open] summary:after{content:"−"}.faq p{max-width:840px;margin:0;padding:0 40px 17px 0;color:var(--muted);font-size:13px}.cta-band{background:#eee2dc;padding:39px 0}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}.cta-inner h2{font-size:23px;margin:0}.cta-inner p{margin:6px 0 0;color:#6e6361;font-size:13px}.site-footer{background:#28242a;color:#eee7eb;padding:43px 0 19px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}.footer-brand{font-size:18px;font-weight:750}.footer-about{max-width:290px;color:#bdb4bc;font-size:12px;margin:12px 0 0}.footer-col h3{font-size:12px;color:#fff;margin:2px 0 12px}.footer-col a{display:block;width:fit-content;color:#c4bbc2;font-size:12px;margin:8px 0}.footer-col a:hover{color:#ffb29b}.footer-bottom{display:flex;justify-content:space-between;gap:16px;border-top:1px solid #ffffff20;padding-top:15px;margin-top:30px;color:#aaa0a9;font-size:11px}.no-js{display:none}
@media(max-width:1024px){.container{width:min(var(--max),calc(100% - 48px))}.nav-links{gap:0}.nav-links a{padding:9px 8px;font-size:12px}.hero-stage{min-height:420px}.video-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hot-layout{grid-template-columns:1fr 1.1fr;gap:20px}.hot-side{grid-template-columns:1fr}.hot-mini{grid-template-columns:75px 1fr}.audience-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:calc(100% - 40px)}.site-header{height:66px}.brand{font-size:16px}.brand-mark{width:35px;height:35px}.menu-toggle{display:grid;place-items:center}.nav-wrap{position:relative}.nav-links{display:none;position:absolute;top:65px;left:-20px;right:-20px;background:#fff;padding:9px 20px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch;flex-direction:column}.nav-links.is-open{display:flex}.nav-links a{min-height:46px;display:flex;align-items:center;padding:0 12px;font-size:14px}.hero{padding-top:20px}.hero-stage{min-height:410px}.hero-stage:before{background:linear-gradient(90deg,rgba(28,23,27,.86),rgba(28,23,27,.53)),url('https://images.unsplash.com/photo-1470770841072-f978cf4d019e?auto=format&fit=crop&w=1100&q=80') center/cover}.hero-content{padding:54px 7%}.hero h1{font-size:39px}.section{padding:48px 0}.section h2{font-size:23px}.pain-row{grid-template-columns:1fr 1fr}.pain-item:nth-child(2){border-right:0}.pain-item:nth-child(-n+2){border-bottom:1px solid var(--line)}.solution-grid{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr 1fr;row-gap:24px}.video-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 13px}.hot-layout{grid-template-columns:1fr}.feature-card{min-height:320px}.hot-side{grid-template-columns:1fr 1fr}.hot-mini{grid-template-columns:75px 1fr}.channel{grid-template-columns:35px 1fr 80px;gap:12px}.channel p{grid-column:2/3}.channel-count{grid-column:3;grid-row:1/3}.rank-row{grid-template-columns:40px minmax(0,1fr) 82px;gap:6px 10px;padding:13px 4px}.rank-row.header{display:none}.rank-no{grid-row:1;font-size:13px}.rank-title{grid-column:2/4;grid-row:1;font-size:13px}.rank-row>*:nth-child(3){grid-column:2;grid-row:2}.rank-score{grid-column:3;grid-row:2}.rank-category{grid-column:2/4;grid-row:3}.heat i{width:42px}.stats-grid{grid-template-columns:1fr 1fr}.stat:nth-child(3){border-left:0}.stat:nth-child(-n+2){border-bottom:1px solid #d8cec7}.quote-grid{gap:18px}.quote blockquote{font-size:13px}.metric-table{grid-template-columns:1fr 1fr}.news-list{column-gap:20px}.news-item{grid-template-columns:90px 1fr;gap:10px}.footer-grid{grid-template-columns:1fr 1fr;gap:26px}.cta-inner h2{font-size:20px}}
@media(max-width:520px){.container{width:calc(100% - 32px)}.hero-stage{min-height:430px}.hero-content{padding:48px 23px}.hero h1{font-size:34px}.hero-subtitle{font-size:15px}.hero-copy{font-size:13px}.hero-meta{gap:13px;flex-wrap:wrap}.section-head{align-items:flex-start;flex-direction:column;gap:10px}.section h2{font-size:22px}.pain-item{padding:17px 12px;gap:8px}.pain-item span{font-size:11px}.solution{padding:16px;min-height:155px}.solution p{font-size:11px}.steps{gap:18px 14px}.video-grid{gap:18px 10px}.poster{aspect-ratio:4/3}.card-info{display:block}.rating{display:block;margin-top:3px}.hot-side{grid-template-columns:1fr 1fr;gap:15px 9px}.hot-mini{grid-template-columns:64px 1fr;gap:8px}.hot-mini h3{font-size:12px}.hot-mini p{font-size:10px}.feature-card{min-height:270px}.channel{padding:15px 4px;grid-template-columns:28px 1fr 68px}.channel h3{font-size:13px}.channel p{font-size:11px}.channel-count{font-size:10px}.rank-row{grid-template-columns:34px minmax(0,1fr) 74px}.rank-category{font-size:9px}.stats-grid{grid-template-columns:1fr 1fr}.stat{padding:15px 12px}.stat strong{font-size:23px}.quote-grid{grid-template-columns:1fr;gap:20px}.quote{padding-top:13px}.audience{padding:15px}.audience h3{font-size:13px}.audience p{font-size:11px}.news-list{grid-template-columns:1fr}.news-item{grid-template-columns:100px 1fr}.metric{padding:13px}.metric-value{font-size:17px}.cta-inner{align-items:flex-start;flex-direction:column}.cta-inner .btn{width:100%}.footer-grid{gap:23px 15px}.footer-brand{font-size:16px}.footer-bottom{flex-direction:column;gap:4px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}