/* roulang page: index */
:root{
  --blue:#2468d8;--blue-deep:#174a9b;--blue-soft:#eaf2ff;--cyan:#dff4f4;
  --ink:#17253d;--muted:#64748b;--line:#dce5f0;--paper:#fff;--bg:#f5f8fc;
  --amber:#b87918;--radius:16px;--shadow:0 14px 40px rgba(34,72,125,.09);
  --shadow-hover:0 18px 46px rgba(34,72,125,.15);--max:1220px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue);display:inline-block}.section{padding:94px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:34px}.section-head h2{font-size:clamp(28px,4vw,43px);line-height:1.2;margin:10px 0 0;letter-spacing:-.04em}.section-head p{max-width:550px;color:var(--muted);margin:0}.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.topbar{height:80px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:12px;min-width:245px;font-weight:900;letter-spacing:-.04em;font-size:19px}.brand-mark{width:34px;height:34px;border:2px solid var(--blue);border-radius:10px;display:grid;place-items:center;color:var(--blue);font-size:13px}.search{height:42px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;background:#f8fbff;padding:0 12px;max-width:390px;flex:1;margin-left:auto}.search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(36,104,216,.12)}.search input{border:0;outline:0;background:transparent;width:100%;color:var(--ink)}.search button{background:none;color:var(--muted);font-size:19px;padding:4px}.btn{min-height:44px;padding:10px 18px;border-radius:10px;display:inline-flex;justify-content:center;align-items:center;gap:8px;font-weight:800;transition:.2s ease}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,216,.2)}.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:var(--shadow-hover)}.btn-secondary{background:#fff;border:1px solid #b9cce8;color:var(--blue-deep)}.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}.btn:focus-visible,.tab:focus-visible,.faq-q:focus-visible,.menu-btn:focus-visible{outline:3px solid #9bc0ff;outline-offset:3px}.tabs{border-top:1px solid #edf2f8}.tab-row{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;min-height:56px;align-items:center}.tab-row::-webkit-scrollbar{display:none}.tab{white-space:nowrap;padding:7px 15px;border-radius:999px;color:var(--muted);font-size:14px;transition:.2s}.tab:hover{background:var(--blue-soft);color:var(--blue-deep)}.tab.active{background:var(--blue);color:#fff}.menu-btn{display:none;background:var(--blue-soft);color:var(--blue);border-radius:9px;padding:9px 12px}.hero{padding:76px 0 48px;background:linear-gradient(180deg,#f8fbff 0%,#f5f8fc 100%);position:relative;overflow:hidden}.hero:after{content:"01 / WATCH INDEX";position:absolute;right:4%;top:42px;color:#c6d6ed;font-size:11px;letter-spacing:.16em;transform:rotate(90deg)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.hero h1{font-size:clamp(40px,6vw,68px);line-height:1.12;letter-spacing:-.065em;margin:18px 0 20px;max-width:700px}.hero-copy{font-size:18px;color:var(--muted);max-width:610px;margin:0 0 28px}.actions{display:flex;gap:12px;flex-wrap:wrap}.meta-strip{display:flex;gap:26px;margin-top:42px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.meta-strip strong{display:block;color:var(--ink);font-size:20px;line-height:1.2}.preview{background:#d9e8f9;border-radius:22px;padding:14px;box-shadow:var(--shadow);transform:rotate(1deg)}.preview-screen{height:360px;border-radius:15px;position:relative;overflow:hidden;background:linear-gradient(135deg,#a5c8e7 0%,#edf5fc 38%,#6d94c0 100%)}.preview-screen:before{content:"";position:absolute;inset:16% 13%;border:1px solid rgba(255,255,255,.7);border-radius:50% 45% 45% 35%;transform:rotate(-18deg)}.preview-screen:after{content:"CONTENT FRAME / 001";position:absolute;left:22px;top:20px;color:#fff;font-size:11px;letter-spacing:.14em}.play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;background:#fff;color:var(--blue);display:grid;place-items:center;font-size:25px;box-shadow:0 10px 26px rgba(18,54,95,.18)}.preview-info{display:flex;justify-content:space-between;gap:15px;padding:15px 4px 2px;font-size:13px;color:var(--muted)}.preview-info strong{display:block;color:var(--ink);font-size:16px}.metrics{padding:28px 0 0}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.metric-number{font-size:32px;font-weight:900;color:var(--blue-deep);letter-spacing:-.06em}.metric-label{font-weight:800;margin:4px 0}.metric small{color:var(--muted);font-size:13px}.matrix{display:grid;grid-template-columns:1.35fr .8fr .8fr;grid-template-rows:190px 190px;gap:16px}.entry{border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative;overflow:hidden;background:var(--paper);box-shadow:var(--shadow);transition:.25s}.entry:hover{border-color:#9bb9e5;box-shadow:var(--shadow-hover);transform:translateY(-3px)}.entry.large{grid-row:span 2;background:linear-gradient(135deg,#e5f0ff,#fff)}.entry h3{margin:10px 0 6px;font-size:22px}.entry p{margin:0;color:var(--muted);font-size:14px;max-width:320px}.entry .arrow{position:absolute;right:22px;bottom:20px;color:var(--blue);font-size:24px}.entry .ghost{position:absolute;right:-10px;bottom:-30px;font-size:120px;color:rgba(36,104,216,.08);font-weight:900}.label{display:inline-flex;padding:4px 9px;border-radius:6px;background:var(--blue-soft);color:var(--blue-deep);font-size:11px;font-weight:800}.label.amber{background:#fff3dc;color:var(--amber)}.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.compare-card.primary{border-top:4px solid var(--blue)}.compare-card h3{margin:0 0 20px;font-size:22px}.compare-list{list-style:none;margin:0;padding:0;display:grid;gap:15px}.compare-list li{display:flex;gap:12px;color:var(--muted);font-size:14px}.compare-list b{color:var(--blue);font-size:17px}.faq-wrap{max-width:850px}.faq-item{border-top:1px solid var(--line)}.faq-q{width:100%;background:none;text-align:left;padding:20px 5px;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:800;font-size:17px}.faq-q span{color:var(--blue);font-size:25px;transition:.2s}.faq-a{display:none;color:var(--muted);font-size:15px;padding:0 40px 20px 5px}.faq-item.open .faq-a{display:block}.faq-item.open .faq-q span{transform:rotate(45deg)}.notice{color:var(--muted);font-size:13px;margin:20px 0 0}.contact{background:#eaf3ff;border:1px solid #cddff5;border-radius:22px;padding:42px}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:start}.contact h2{font-size:34px;line-height:1.25;margin:10px 0 15px}.contact p{color:var(--muted)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:grid;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:800}.field input,.field select,.field textarea{width:100%;border:1px solid #c7d7eb;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink);outline:0}.field textarea{min-height:110px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(36,104,216,.12)}.form-message{display:none;margin-top:12px;color:var(--blue-deep);font-size:14px}.site-footer{background:#e8eef7;border-top:1px solid var(--line);padding:48px 0 22px}.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:30px}.footer-brand p{color:var(--muted);font-size:14px;max-width:300px}.footer-col h3{font-size:14px;margin:0 0 13px}.footer-col a{display:block;color:var(--muted);font-size:14px;margin:7px 0}.footer-col a:hover{color:var(--blue)}.copyright{border-top:1px solid #d2deed;margin-top:34px;padding-top:18px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:15px}.empty{display:none}.loading{opacity:.65;pointer-events:none}.disabled{opacity:.45;cursor:not-allowed}
@media(max-width:1024px){.hero-grid{gap:38px}.matrix{grid-template-columns:1fr 1fr;grid-template-rows:auto}.entry.large{grid-row:auto;grid-column:span 2;min-height:210px}.metric-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 36px,var(--max))}.topbar{height:68px;gap:10px}.brand{min-width:0;font-size:16px}.brand-mark{width:30px;height:30px}.search{display:none}.menu-btn{display:block}.topbar>.btn{margin-left:auto;padding:9px 12px;font-size:13px}.hero{padding:52px 0 30px}.hero:after{display:none}.hero-grid{grid-template-columns:1fr;gap:34px}.hero h1{font-size:clamp(37px,11vw,52px)}.hero-copy{font-size:16px}.preview-screen{height:290px}.section{padding:68px 0}.section-head{display:block}.section-head p{margin-top:14px}.compare{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr;gap:24px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
@media(max-width:520px){.container{width:calc(100% - 30px)}.brand{font-size:14px}.topbar>.btn{display:none}.tab-row{min-height:50px}.metric{padding:16px}.metric-number{font-size:26px}.matrix{display:flex;flex-direction:column}.entry,.entry.large{min-height:175px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.contact{padding:25px 18px}.contact h2{font-size:28px}.footer-grid{grid-template-columns:1fr}.meta-strip{gap:15px;flex-wrap:wrap}.actions .btn{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category2 */
:root{
 --blue:#2468d8;--blue-deep:#174a9b;--blue-soft:#eaf2ff;--cyan:#dff4f4;
 --ink:#17253d;--muted:#64748b;--line:#dce5f0;--paper:#fff;--bg:#f5f8fc;
 --amber:#b87918;--radius:16px;--shadow:0 14px 40px rgba(34,72,125,.09);
 --shadow-hover:0 18px 46px rgba(34,72,125,.15);--max:1220px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:.12em}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue);display:inline-block}
.section{padding:88px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,4vw,43px);line-height:1.2;margin:10px 0 0;letter-spacing:-.04em}
.section-head p{max-width:550px;color:var(--muted);margin:0}
.site-header{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar{height:80px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;min-width:245px;font-weight:900;letter-spacing:-.04em;font-size:19px}
.brand-mark{width:34px;height:34px;border:2px solid var(--blue);border-radius:10px;display:grid;place-items:center;color:var(--blue);font-size:13px}
.search{height:42px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;background:#f8fbff;padding:0 12px;max-width:390px;flex:1;margin-left:auto}
.search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(36,104,216,.12)}
.search input{border:0;outline:0;background:transparent;width:100%;color:var(--ink)}
.search button{background:none;color:var(--muted);font-size:19px;padding:4px}
.btn{min-height:44px;padding:10px 18px;border-radius:10px;display:inline-flex;justify-content:center;align-items:center;gap:8px;font-weight:800;transition:.2s ease}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,216,.2)}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-secondary{background:#fff;border:1px solid #b9cce8;color:var(--blue-deep)}
.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
.btn:focus-visible,.tab:focus-visible,.faq-q:focus-visible,.menu-btn:focus-visible{outline:3px solid #9bc0ff;outline-offset:3px}
.tab-row{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;min-height:56px;align-items:center}
.tab-row::-webkit-scrollbar{display:none}
.tab{padding:8px 16px;border-radius:9px;color:var(--muted);font-size:14px;white-space:nowrap;transition:.2s}
.tab:hover{color:var(--blue);background:var(--blue-soft)}
.tab.active{background:var(--blue);color:#fff;box-shadow:0 5px 12px rgba(36,104,216,.18)}
.menu-btn{display:none;background:var(--blue-soft);color:var(--blue);border-radius:9px;padding:9px 12px}
.page-hero{padding:66px 0 54px;background:linear-gradient(180deg,#f8fbff 0%,#f5f8fc 100%);border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:32px}
.breadcrumb a:hover{color:var(--blue)}
.hero-layout{display:grid;grid-template-columns:1fr .88fr;gap:68px;align-items:center}
.page-hero h1{font-size:clamp(38px,5.5vw,64px);line-height:1.12;letter-spacing:-.06em;margin:16px 0 20px;max-width:700px}
.hero-copy{font-size:18px;color:var(--muted);max-width:620px;margin:0 0 28px}
.action-row{display:flex;gap:12px;flex-wrap:wrap}
.topic-cover{min-height:370px;border-radius:20px;position:relative;overflow:hidden;background:linear-gradient(135deg,#dcecff 0%,#8fb8ed 46%,#3469b9 100%);box-shadow:var(--shadow);border:1px solid #c4d8f1}
.topic-cover:before,.topic-cover:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.5);transform:rotate(-10deg)}
.topic-cover:before{width:70%;height:70%;right:-12%;top:-12%}
.topic-cover:after{width:55%;height:55%;left:-10%;bottom:-10%;border-radius:50%}
.cover-label{position:absolute;top:24px;left:24px;color:#174a9b;font-weight:800;font-size:12px;letter-spacing:.12em}
.cover-title{position:absolute;left:28px;bottom:82px;color:#fff;font-size:34px;font-weight:900;line-height:1.2;max-width:280px;letter-spacing:-.04em}
.cover-meta{position:absolute;left:28px;right:28px;bottom:25px;color:#eaf2ff;border-top:1px solid rgba(255,255,255,.4);padding-top:12px;font-size:13px;display:flex;justify-content:space-between}
.topic-index{position:absolute;right:26px;top:70px;color:rgba(255,255,255,.72);font-size:13px;writing-mode:vertical-rl;letter-spacing:.15em}
.tag{display:inline-flex;align-items:center;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800;background:var(--blue-soft);color:var(--blue-deep)}
.tag.amber{background:#fff3d8;color:var(--amber)}
.tag.gray{background:#eef2f7;color:#64748b}
.feature-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
.feature-card,.update-card,.related-card,.feedback-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.22s ease}
.feature-card:hover,.update-card:hover,.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#b5ccef}
.feature-card{padding:30px;min-height:290px;position:relative;overflow:hidden}
.feature-card.large{background:linear-gradient(135deg,#fff 0%,#f0f6ff 100%)}
.feature-card h3{font-size:27px;line-height:1.3;margin:18px 0 10px}
.feature-card p,.update-card p,.related-card p{color:var(--muted);margin:0;font-size:14px}
.feature-card .number{position:absolute;right:25px;top:25px;color:#c9d8ed;font-size:44px;font-weight:900}
.card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:30px;color:var(--blue);font-weight:800;font-size:14px}
.update-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;align-items:start}
.update-list{display:grid;gap:12px}
.update-card{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:14px}
.thumb{min-height:105px;border-radius:11px;background:linear-gradient(135deg,#b6d1f2,#4c7cc4);position:relative;overflow:hidden}
.thumb:after{content:"▶";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.9);color:var(--blue);font-size:12px}
.update-card h3{margin:5px 0 5px;font-size:17px;line-height:1.35}
.meta{font-size:12px;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap}
.timeline{border-left:2px solid #c7daf4;padding-left:24px;display:grid;gap:27px}
.timeline-item{position:relative}
.timeline-item:before{content:"";position:absolute;width:11px;height:11px;border-radius:50%;background:var(--blue);left:-31px;top:8px;box-shadow:0 0 0 5px var(--blue-soft)}
.timeline time{font-size:12px;color:var(--blue-deep);font-weight:800}
.timeline h3{font-size:19px;margin:5px 0 5px}
.timeline p{margin:0;color:var(--muted);font-size:14px}
.related-grid{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:18px;align-items:stretch}
.related-card{padding:23px;min-height:180px;position:relative}
.related-card h3{font-size:19px;margin:14px 0 7px}
.related-card .arrow{position:absolute;right:22px;bottom:18px;color:var(--blue);font-size:22px}
.filter-bar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:28px}
.filter{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:9px;padding:8px 14px;font-size:13px;transition:.2s}
.filter:hover,.filter.active{border-color:var(--blue);color:var(--blue-deep);background:var(--blue-soft)}
.feedback-box{padding:28px 32px;display:flex;justify-content:space-between;align-items:center;gap:25px;background:#edf5ff}
.feedback-box h2{margin:0 0 7px;font-size:25px}
.feedback-box p{margin:0;color:var(--muted);font-size:14px}
.faq-wrap{max-width:850px}
.faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;background:none;text-align:left;padding:20px 5px;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:800;font-size:17px}
.faq-q span{color:var(--blue);font-size:25px;transition:.2s}
.faq-a{display:none;color:var(--muted);font-size:15px;padding:0 40px 20px 5px}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q span{transform:rotate(45deg)}
.site-footer{background:#e8eef7;border-top:1px solid var(--line);padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:30px}
.footer-brand p{color:var(--muted);font-size:14px;max-width:300px}
.footer-col h3{font-size:14px;margin:0 0 13px}
.footer-col a{display:block;color:var(--muted);font-size:14px;margin:7px 0}
.footer-col a:hover{color:var(--blue)}
.copyright{border-top:1px solid #d2deed;margin-top:34px;padding-top:18px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:1024px){
 .hero-layout{gap:35px}.feature-grid{grid-template-columns:1fr 1fr}.related-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
 .container{width:min(100% - 36px,var(--max))}
 .topbar{height:68px;gap:10px}.brand{min-width:0;font-size:16px}.brand-mark{width:30px;height:30px}
 .search{display:none}.menu-btn{display:block}.topbar>.btn{margin-left:auto;padding:9px 12px;font-size:13px}
 .tab-row{min-height:50px}.page-hero{padding:45px 0 35px}.hero-layout,.update-layout{grid-template-columns:1fr}
 .page-hero h1{font-size:clamp(37px,11vw,52px)}.hero-copy{font-size:16px}.topic-cover{min-height:300px}
 .section{padding:68px 0}.section-head{display:block}.section-head p{margin-top:14px}
 .feature-grid,.related-grid{grid-template-columns:1fr}.feature-card{min-height:220px}
 .feedback-box{display:block}.feedback-box .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}
}
@media(max-width:520px){
 .container{width:calc(100% - 30px)}.brand{font-size:14px}.topbar>.btn{display:none}
 .page-hero h1{font-size:36px}.action-row .btn{width:100%}.topic-cover{min-height:270px}
 .cover-title{font-size:28px;left:22px;bottom:75px}.cover-meta{left:22px;right:22px}
 .update-card{grid-template-columns:105px 1fr;gap:12px;padding:10px}.thumb{min-height:86px}
 .update-card h3{font-size:15px}.footer-grid{grid-template-columns:1fr}.copyright span{display:block;margin-bottom:8px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* roulang page: category1 */
:root{
 --blue:#2468d8;--blue-deep:#174a9b;--blue-soft:#eaf2ff;--cyan:#dff4f4;
 --ink:#17253d;--muted:#64748b;--line:#dce5f0;--paper:#fff;--bg:#f5f8fc;
 --amber:#b87918;--radius:16px;--shadow:0 14px 40px rgba(34,72,125,.09);
 --shadow-hover:0 18px 46px rgba(34,72,125,.15);--max:1220px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:.12em}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue);display:inline-block}
.section{padding:84px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,4vw,43px);line-height:1.2;margin:10px 0 0;letter-spacing:-.04em}
.section-head p{max-width:560px;color:var(--muted);margin:0}
.site-header{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar{height:80px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;min-width:245px;font-weight:900;letter-spacing:-.04em;font-size:19px}
.brand-mark{width:34px;height:34px;border:2px solid var(--blue);border-radius:10px;display:grid;place-items:center;color:var(--blue);font-size:13px}
.search{height:42px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;background:#f8fbff;padding:0 12px;max-width:390px;flex:1;margin-left:auto}
.search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(36,104,216,.12)}
.search input{border:0;outline:0;background:transparent;width:100%;color:var(--ink)}
.search button{background:none;color:var(--muted);font-size:19px;padding:4px}
.btn{min-height:44px;padding:10px 18px;border-radius:10px;display:inline-flex;justify-content:center;align-items:center;gap:8px;font-weight:800;transition:.2s ease}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,216,.2)}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-secondary{background:#fff;border:1px solid #b9cce8;color:var(--blue-deep)}
.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
.btn:focus-visible,.tab:focus-visible,.faq-q:focus-visible,.menu-btn:focus-visible,.filter-btn:focus-visible{outline:3px solid #9bc0ff;outline-offset:3px}
.tabs{background:#fff}
.tab-row{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;min-height:56px;align-items:center}
.tab-row::-webkit-scrollbar{display:none}
.tab{padding:7px 16px;border-radius:999px;color:var(--muted);font-size:14px;white-space:nowrap;transition:.2s}
.tab:hover{background:var(--blue-soft);color:var(--blue-deep)}
.tab.active{background:var(--blue);color:#fff;box-shadow:0 6px 14px rgba(36,104,216,.18)}
.menu-btn{display:none;background:var(--blue-soft);color:var(--blue);border-radius:9px;padding:9px 12px}
.page-hero{padding:78px 0 58px;background:linear-gradient(180deg,#f8fbff 0%,#f5f8fc 100%);border-bottom:1px solid var(--line)}
.page-hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:68px;align-items:center}
.page-hero h1{font-size:clamp(40px,5.5vw,64px);line-height:1.12;letter-spacing:-.065em;margin:17px 0 20px}
.page-hero p{color:var(--muted);font-size:18px;max-width:590px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.cover-panel{position:relative;min-height:330px;border-radius:20px;overflow:hidden;background:linear-gradient(135deg,#dbeaff 0%,#8ab7ef 46%,#2c65b7 100%);box-shadow:var(--shadow)}
.cover-panel:before{content:"";position:absolute;inset:18px 18px auto auto;width:45%;height:70%;border:1px solid rgba(255,255,255,.5);border-radius:50%;transform:rotate(-24deg)}
.cover-panel:after{content:"精选内容 / 01";position:absolute;left:28px;top:28px;color:#fff;font-size:12px;letter-spacing:.16em}
.cover-shape{position:absolute;width:250px;height:250px;border-radius:50%;background:rgba(255,255,255,.2);right:15%;bottom:-80px}
.play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:70px;height:70px;border-radius:50%;background:#fff;color:var(--blue);display:grid;place-items:center;font-size:25px;padding-left:4px;box-shadow:0 12px 25px rgba(20,61,120,.2);transition:.2s}
.play:hover{transform:translate(-50%,-50%) scale(1.06)}
.cover-meta{position:absolute;bottom:0;left:0;right:0;padding:18px 22px;background:linear-gradient(transparent,rgba(19,49,100,.82));color:#fff;display:flex;justify-content:space-between;align-items:end}
.cover-meta strong{display:block;font-size:20px}
.cover-meta span{font-size:13px;opacity:.86}
.filter-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:34px}
.filter-label{font-size:13px;font-weight:800;color:var(--ink);margin-right:2px}
.filter-group{display:flex;gap:8px;flex-wrap:wrap}
.filter-btn{border:1px solid var(--line);background:#f9fbfe;color:var(--muted);padding:8px 13px;border-radius:9px;font-size:13px;transition:.2s}
.filter-btn:hover{border-color:#9dbbe5;color:var(--blue-deep);background:var(--blue-soft)}
.filter-btn.active{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-deep);font-weight:800}
.feature-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;margin-bottom:20px}
.video-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
.video-card:hover{border-color:#a8c5ec;box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.card-visual{height:190px;position:relative;overflow:hidden;background:linear-gradient(135deg,#d8edff,#6097dc 52%,#174a9b)}
.card-visual.alt{background:linear-gradient(135deg,#e7f4f1,#81c3c7 48%,#38789f)}
.card-visual.warm{background:linear-gradient(135deg,#fff1d8,#e7b66d 54%,#9a6b42)}
.card-visual:before{content:"";position:absolute;width:52%;height:130%;right:-10%;top:-24%;border:1px solid rgba(255,255,255,.55);border-radius:50%;transform:rotate(25deg)}
.card-visual:after{content:"";position:absolute;width:120px;height:120px;left:18%;bottom:-65px;border-radius:50%;background:rgba(255,255,255,.18)}
.card-badge{position:absolute;left:15px;top:14px;background:rgba(255,255,255,.88);color:var(--blue-deep);border-radius:6px;padding:3px 8px;font-size:11px;font-weight:800}
.duration{position:absolute;right:14px;bottom:13px;background:rgba(16,35,69,.7);color:#fff;border-radius:5px;padding:3px 7px;font-size:12px}
.mini-play{position:absolute;left:18px;bottom:13px;width:30px;height:30px;border-radius:50%;background:#fff;color:var(--blue);display:grid;place-items:center;font-size:11px;padding-left:2px}
.card-body{padding:19px 20px}
.card-body h3{font-size:19px;line-height:1.35;margin:0 0 8px}
.card-body p{font-size:14px;color:var(--muted);margin:0 0 14px}
.card-meta{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:12px;border-top:1px solid var(--line);padding-top:12px}
.card-meta a{color:var(--blue-deep);font-weight:800}
.feature-card .card-visual{height:285px}
.entry-list{display:grid;gap:12px}
.list-item{display:grid;grid-template-columns:145px 1fr auto;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;transition:.2s}
.list-item:hover{border-color:#9dbbe5;box-shadow:var(--shadow)}
.list-visual{height:88px;border-radius:9px;background:linear-gradient(135deg,#d9e8fb,#6c9dd9);position:relative;overflow:hidden}
.list-visual.c2{background:linear-gradient(135deg,#e0f0ee,#69aeb7)}
.list-visual:before{content:"";position:absolute;inset:18px 25px;border:1px solid rgba(255,255,255,.6);border-radius:50%}
.list-item h3{font-size:16px;margin:0 0 5px;line-height:1.35}
.list-item p{margin:0;color:var(--muted);font-size:13px}
.list-item .arrow{color:var(--blue);font-size:22px}
.rail{display:flex;gap:16px;overflow-x:auto;padding:5px 2px 14px;scrollbar-width:thin}
.rail .video-card{min-width:260px;flex:0 0 260px}
.note{padding:18px 20px;border-left:3px solid var(--blue);background:var(--blue-soft);color:var(--muted);font-size:14px;border-radius:0 10px 10px 0}
.faq-wrap{max-width:850px}
.faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;background:none;text-align:left;padding:20px 5px;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:800;font-size:17px}
.faq-q span{color:var(--blue);font-size:25px;transition:.2s}
.faq-a{display:none;color:var(--muted);font-size:15px;padding:0 40px 20px 5px}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q span{transform:rotate(45deg)}
.contact-box{background:#eaf2ff;border:1px solid #cbdcf4;border-radius:20px;padding:34px}
.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:start}
.contact-box h2{font-size:34px;line-height:1.2;margin:10px 0 15px}
.contact-box p{color:var(--muted);margin:0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.field label{display:block;font-size:13px;font-weight:800;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;border:1px solid #c7d7eb;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink);outline:0}
.field textarea{min-height:110px;resize:vertical}
.field.full{grid-column:1/-1}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(36,104,216,.12)}
.form-message{display:none;margin-top:12px;color:var(--blue-deep);font-size:14px}
.site-footer{background:#e8eef7;border-top:1px solid var(--line);padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:30px}
.footer-brand p{color:var(--muted);font-size:14px;max-width:300px}
.footer-col h3{font-size:14px;margin:0 0 13px}
.footer-col a{display:block;color:var(--muted);font-size:14px;margin:7px 0}
.footer-col a:hover{color:var(--blue)}
.copyright{border-top:1px solid #d2deed;margin-top:34px;padding-top:18px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:1024px){
 .page-hero-grid{gap:35px}
 .feature-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
 .container{width:min(100% - 36px,var(--max))}
 .topbar{height:68px;gap:10px}
 .brand{min-width:0;font-size:16px}
 .brand-mark{width:30px;height:30px}
 .search{display:none}
 .menu-btn{display:block}
 .topbar>.btn{margin-left:auto;padding:9px 12px;font-size:13px}
 .page-hero{padding:52px 0 30px}
 .page-hero-grid{grid-template-columns:1fr;gap:34px}
 .page-hero h1{font-size:clamp(37px,11vw,52px)}
 .page-hero p{font-size:16px}
 .section{padding:68px 0}
 .section-head{display:block}
 .section-head p{margin-top:14px}
 .filter-panel{align-items:flex-start;gap:12px}
 .filter-group{overflow-x:auto;flex-wrap:nowrap;width:100%;padding-bottom:3px}
 .filter-btn{white-space:nowrap}
 .list-item{grid-template-columns:105px 1fr}
 .list-item .arrow{display:none}
 .list-visual{height:72px}
 .contact-grid{grid-template-columns:1fr;gap:24px}
 .footer-grid{grid-template-columns:1fr 1fr}
 .copyright{display:block}
 .copyright span{display:block;margin-top:5px}
}
@media(max-width:520px){
 .hero-actions .btn{width:100%}
 .cover-panel{min-height:260px}
 .feature-card .card-visual{height:220px}
 .form-grid{grid-template-columns:1fr}
 .field.full{grid-column:auto}
 .footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
 *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
}