/* roulang page: index */
:root{--blue:#2868c7;--blue-dark:#194f9e;--ink:#1e2938;--muted:#66758a;--line:#e4eaf1;--paper:#fff;--bg:#f5f8fc;--teal:#237e79;--coral:#ba684c;--gold:#9b741d;--radius:8px;--shadow:0 8px 24px rgba(35,61,97,.07);--container:1160px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:82px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #91baf4;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(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav-wrap{height:72px;display:flex;align-items:center;gap:30px}.brand{display:flex;align-items:center;gap:11px;min-width:0;font-weight:750;font-size:16px}.brand-mark{width:34px;height:34px;border-radius:7px;background:var(--blue);color:white;display:grid;place-items:center;font-size:17px;flex:none}.nav-links{display:flex;gap:25px;margin-left:auto;align-items:center}.nav-links a{color:#526176;font-size:14px;transition:color .18s}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--blue)}.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--blue);border-radius:6px;padding:10px 17px;background:var(--blue);color:white;font-weight:650;transition:background .18s,border-color .18s,box-shadow .18s}.nav-cta:hover,.button:hover{background:var(--blue-dark);border-color:var(--blue-dark);box-shadow:0 5px 14px #2868c72b}.button.secondary{background:#fff;color:var(--blue)}.button.secondary:hover{background:#f0f6ff}.menu-toggle{display:none;border:1px solid var(--line);background:white;border-radius:6px;width:42px;height:42px;color:var(--ink)}
.hero{background:var(--bg);padding:50px 0 32px;border-bottom:1px solid var(--line)}.hero-inner{position:relative;overflow:hidden;min-height:315px;display:flex;align-items:center;padding:38px 50px;background:#eaf2fc;border-radius:8px}.hero-inner:after{content:"";position:absolute;right:8%;top:0;width:36%;height:100%;background:linear-gradient(135deg,transparent 0 48%,rgba(255,255,255,.48) 48% 49%,transparent 49%),linear-gradient(45deg,transparent 0 65%,rgba(40,104,199,.08) 65%);pointer-events:none}.hero-copy{position:relative;z-index:1;max-width:700px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);font-weight:700;font-size:13px}.eyebrow:before{content:"";width:7px;height:7px;background:#4b9f91;border-radius:50%}.hero h1{margin:14px 0 9px;font-size:36px;line-height:1.25;font-weight:760}.hero h1 span{color:var(--blue)}.hero-subtitle{font-size:18px;font-weight:650;margin:0 0 9px}.hero-copy>p{color:#53647a;max-width:630px;margin:0 0 20px}.hero-actions{display:flex;gap:11px;flex-wrap:wrap}.hero-meta{display:flex;gap:20px;margin-top:18px;color:#63738a;font-size:13px}.hero-meta strong{color:#30445f}.section{padding:64px 0}.section.soft{background:var(--bg)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px}.section-kicker{font-size:12px;letter-spacing:0;color:var(--blue);font-weight:750;text-transform:none}.section h2{font-size:25px;line-height:1.35;margin:5px 0 0;font-weight:740}.section-intro{max-width:720px;color:var(--muted);margin:10px 0 0}.text-link{color:var(--blue);font-weight:650;white-space:nowrap}.text-link:hover{text-decoration:underline}.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:8px;background:white;overflow:hidden}.stat{padding:22px 24px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{display:block;font-size:25px;line-height:1.2;color:var(--blue);font-weight:750}.stat span{display:block;margin-top:7px;color:#56667a;font-size:13px}.matrix{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.matrix a{min-height:105px;padding:18px 20px;background:white;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .18s}.matrix a:hover{background:#f3f7fd}.matrix strong{display:block;font-size:16px}.matrix span{display:block;color:var(--muted);font-size:13px;margin-top:5px}.matrix .arrow{float:right;color:var(--blue);font-size:18px}
.media-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px 18px}.media-card{min-width:0;transition:box-shadow .2s}.media-card:hover{box-shadow:var(--shadow)}.poster{aspect-ratio:3/4;position:relative;overflow:hidden;border-radius:7px;background:#dce8f4;display:grid;place-items:center;color:#314d6e}.poster:before,.poster:after{content:"";position:absolute;inset:0;pointer-events:none}.poster:before{background:linear-gradient(145deg,rgba(255,255,255,.5),transparent 50%),linear-gradient(25deg,rgba(35,126,121,.15),transparent 65%)}.poster:after{width:58%;height:58%;inset:auto 0 0 auto;border-radius:100% 0 0 0;background:rgba(255,255,255,.28)}.poster .poster-label{position:relative;z-index:1;font-size:13px;font-weight:700;letter-spacing:0;color:#365476}.poster .tag{position:absolute;z-index:2;top:10px;left:10px}.tag{display:inline-flex;padding:3px 8px;border-radius:4px;background:#fff;color:#51647c;font-size:11px;font-weight:650}.tag.blue{background:#e8f1ff;color:#245dad}.tag.green{background:#e8f5f1;color:#257466}.tag.coral{background:#fff0e9;color:#a95f3f}.media-info{padding:11px 2px 5px}.media-title{margin:0;font-size:15px;line-height:1.45;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.media-meta{display:flex;justify-content:space-between;gap:6px;align-items:center;margin-top:7px;color:var(--muted);font-size:12px}.rating{color:#966c12;font-weight:700}.popular-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:stretch}.feature-pop{display:grid;grid-template-columns:.85fr 1fr;min-height:325px;background:white;border:1px solid var(--line);border-radius:8px;overflow:hidden}.feature-pop .poster{height:100%;aspect-ratio:auto;border-radius:0}.feature-copy{padding:27px;display:flex;flex-direction:column;justify-content:center}.feature-copy h3{font-size:22px;margin:10px 0}.feature-copy p{color:var(--muted);margin:0 0 16px}.popular-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}.popular-item{display:flex;gap:12px;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--line);min-width:0}.mini-poster{width:58px;aspect-ratio:3/4;flex:none;border-radius:5px;background:linear-gradient(145deg,#d8e8ed,#c7d7ed);display:grid;place-items:center;color:#46617e;font-size:11px}.popular-item strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.popular-item small{color:var(--muted)}.channels{display:grid;grid-template-columns:repeat(4,1fr);gap:0 26px}.channel{padding:17px 0;border-top:1px solid var(--line)}.channel h3{font-size:16px;margin:0 0 6px}.channel p{font-size:13px;color:var(--muted);line-height:1.7;margin:0}.rank-layout{display:grid;grid-template-columns:1fr 1fr;gap:0 38px}.rank{list-style:none;padding:0;margin:0}.rank li{display:grid;grid-template-columns:38px minmax(0,1fr) 76px 78px;gap:10px;align-items:center;min-height:57px;border-bottom:1px solid var(--line);font-size:13px}.rank-num{font-size:16px;font-weight:750;color:#9aa7b6}.rank li:nth-child(-n+3) .rank-num{color:var(--blue);font-size:20px}.rank-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:650}.rank-heat,.rank-score{color:var(--muted);text-align:right}.rank-score{color:#966c12;font-weight:700}.rank-category{display:none}.compare{display:grid;grid-template-columns:1fr 1fr;gap:30px}.compare-col{padding:24px 0;border-top:2px solid var(--blue)}.compare-col.alt{border-color:#52a092}.compare h3{margin:0 0 13px;font-size:17px}.compare ul{list-style:none;padding:0;margin:0}.compare li{padding:9px 0 9px 21px;position:relative;border-bottom:1px solid var(--line);color:#526176}.compare li:before{content:"";position:absolute;left:2px;top:19px;width:7px;height:7px;border-radius:50%;background:var(--blue)}.compare-col.alt li:before{background:#52a092}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}.timeline:before{content:"";position:absolute;top:8px;left:4%;right:4%;height:1px;background:#ccd8e7}.milestone{position:relative;padding-top:27px}.milestone:before{content:"";position:absolute;top:2px;left:0;width:13px;height:13px;background:var(--blue);border:3px solid white;box-shadow:0 0 0 1px var(--blue);border-radius:50%}.milestone time{font-size:12px;color:var(--blue);font-weight:700}.milestone h3{font-size:15px;margin:5px 0}.milestone p{font-size:13px;color:var(--muted);margin:0}.news-layout{display:grid;grid-template-columns:1fr 1fr;gap:36px}.news-list{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}.news-item{display:grid;grid-template-columns:78px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);min-width:0}.news-thumb{aspect-ratio:1.25;border-radius:5px;background:linear-gradient(135deg,#dceaf1,#e7e5d9);display:grid;place-items:center;color:#516b82;font-size:11px}.news-item h3{font-size:13px;line-height:1.55;margin:0 0 5px}.news-item time{font-size:11px;color:#8190a1}.editor-note{padding:20px 22px;background:#edf4fb;border-radius:7px;align-self:start}.editor-note h3{margin:0 0 8px;font-size:16px}.editor-note p{margin:0;color:#576a80;font-size:14px}.assurance{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.assurance article{padding:20px 0;border-top:1px solid var(--line)}.assurance h3{font-size:16px;margin:0 0 7px}.assurance p{color:var(--muted);font-size:13px;margin:0}.quick-answers{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.quick-answers article{border-left:3px solid #6c9bd8;padding:2px 0 2px 15px}.quick-answers h3{font-size:15px;margin:0 0 7px}.quick-answers p{font-size:13px;color:var(--muted);margin:0}.faq-list{max-width:860px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{list-style:none;position:relative;cursor:pointer;padding:17px 38px 17px 0;font-weight:650}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"＋";position:absolute;right:5px;top:16px;color:var(--blue);font-size:18px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{color:var(--muted);margin:0;padding:0 38px 17px 0}.form-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:48px;align-items:start}.form-copy h2{margin:0 0 12px}.form-copy p{color:var(--muted);margin:0}.feedback-form{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:grid;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:650}.field input,.field select,.field textarea{width:100%;border:1px solid #d5deea;background:white;border-radius:5px;padding:10px 11px;color:var(--ink)}.field textarea{min-height:90px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue)}.form-note{grid-column:1/-1;margin:0;color:var(--muted);font-size:12px}.form-submit{grid-column:1/-1;justify-self:start}.topic-links{display:flex;gap:11px;flex-wrap:wrap}.topic-links a{padding:9px 14px;border:1px solid var(--line);border-radius:5px;background:white;color:#43566f;font-size:13px;transition:border-color .18s,color .18s}.topic-links a:hover{border-color:var(--blue);color:var(--blue)}.update-list{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.update-item{padding:15px 0;border-top:2px solid #c8d9ed}.update-item time{font-size:12px;color:var(--blue);font-weight:700}.update-item p{margin:5px 0 0;font-size:13px;color:#526176}.site-footer{background:#f0f4f8;border-top:1px solid var(--line);padding:38px 0 20px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}.footer-brand p{font-size:13px;color:var(--muted);max-width:300px}.footer-col h3{font-size:13px;margin:0 0 10px}.footer-col a{display:block;font-size:13px;color:#63738a;margin:6px 0}.footer-col a:hover{color:var(--blue)}.copyright{border-top:1px solid #dce3eb;margin-top:27px;padding-top:15px;color:#77869a;font-size:12px;display:flex;justify-content:space-between;gap:12px}.age-note{font-size:12px;color:#718095;margin-top:12px}
@media(max-width:1024px){.nav-wrap{gap:18px}.nav-links{gap:16px}.nav-cta{padding:9px 12px}.media-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.channels{grid-template-columns:repeat(2,1fr)}.popular-layout{grid-template-columns:1fr}.popular-list{grid-template-columns:repeat(3,1fr)}.section{padding:54px 0}}
@media(max-width:768px){.container{width:min(100% - 36px,var(--container))}.nav-wrap{height:64px}.brand{font-size:14px}.nav-cta{display:none}.menu-toggle{display:grid;place-items:center;margin-left:auto}.nav-links{display:none;position:absolute;top:63px;left:0;right:0;padding:12px 18px 18px;background:white;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}.nav-links.open{display:flex}.nav-links a{padding:11px 4px;border-bottom:1px solid #edf0f4}.hero{padding:27px 0}.hero-inner{min-height:280px;padding:28px}.hero h1{font-size:31px}.hero-inner:after{right:-20%;width:55%}.stats{grid-template-columns:1fr 1fr}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.media-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:17px 13px}.feature-pop{min-height:260px}.rank-layout{gap:0 20px}.news-layout{grid-template-columns:1fr}.news-list{grid-template-columns:1fr 1fr}.timeline{grid-template-columns:repeat(2,1fr);row-gap:25px}.timeline:before{display:none}.assurance{gap:18px}.quick-answers{grid-template-columns:1fr 1fr}.form-wrap{grid-template-columns:1fr;gap:20px}.footer-grid{grid-template-columns:1fr 1fr}.update-list{grid-template-columns:1fr 1fr}}
@media(max-width:520px){body{font-size:14px}.container{width:calc(100% - 30px)}.hero-inner{padding:24px 20px;min-height:285px}.hero h1{font-size:27px}.hero-subtitle{font-size:16px}.hero-copy>p{font-size:13px}.hero-meta{gap:12px;flex-wrap:wrap;font-size:12px}.section{padding:43px 0}.section-head{align-items:start;flex-direction:column;gap:8px;margin-bottom:20px}.section h2{font-size:22px}.stats .stat{padding:17px}.stat strong{font-size:22px}.matrix{grid-template-columns:1fr 1fr}.matrix a{padding:15px;min-height:95px}.media-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px}.media-title{font-size:14px}.feature-pop{grid-template-columns:.8fr 1fr;min-height:230px}.feature-copy{padding:15px}.feature-copy h3{font-size:18px}.feature-copy p{font-size:12px}.popular-list{grid-template-columns:1fr 1fr}.channels{grid-template-columns:1fr 1fr;gap:0 16px}.channel{padding:13px 0}.channel h3{font-size:14px}.channel p{font-size:12px}.rank-layout{grid-template-columns:1fr}.rank li{grid-template-columns:32px minmax(0,1fr) 68px 55px;min-height:52px}.rank-heat{display:none}.rank-category{display:block;font-size:11px;color:var(--muted)}.compare{gap:16px}.compare-col{padding:17px 0}.compare h3{font-size:15px}.compare li{font-size:12px}.timeline{gap:16px}.milestone p{font-size:12px}.news-list{grid-template-columns:1fr}.news-item{grid-template-columns:72px 1fr}.assurance{grid-template-columns:1fr;gap:0}.quick-answers{grid-template-columns:1fr;gap:17px}.feedback-form{grid-template-columns:1fr}.field.full,.form-note,.form-submit{grid-column:1}.footer-grid{grid-template-columns:1fr 1fr;gap:22px 16px}.footer-brand{grid-column:1/-1}.copyright{flex-direction:column}.update-list{grid-template-columns:1fr 1fr;gap:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}