/* roulang page: index */
:root{
            --ink:#182434;
            --muted:#6d7b8d;
            --soft:#f4f7fb;
            --paper:#ffffff;
            --line:#e5eaf1;
            --blue:#1769e0;
            --blue-dark:#0f4fb1;
            --cyan:#1eb6bd;
            --pink:#ef5b8d;
            --gold:#e6a936;
            --radius:18px;
            --shadow:0 14px 38px rgba(26,53,91,.09);
            --shadow-lg:0 24px 60px rgba(22,52,92,.14);
            --container:1180px;
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:15px}
        a{color:inherit;text-decoration:none}
        img{display:block;width:100%;object-fit:cover}
        button,input{font:inherit}
        button{border:0;cursor:pointer}
        :focus-visible{outline:3px solid rgba(23,105,224,.3);outline-offset:3px}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase}
        .eyebrow:before{content:"";width:24px;height:2px;background:var(--cyan)}
        .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
        .section-head h2{font-size:clamp(25px,3vw,38px);line-height:1.2;letter-spacing:0;font-weight:800}
        .section-head p{max-width:510px;color:var(--muted);font-size:15px}
        .section{padding:94px 0}
        .section.alt{background:var(--soft)}
        .header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(229,234,241,.9)}
        .nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:flex;align-items:center;gap:11px;min-width:max-content;font-size:18px;font-weight:850}
        .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:16px;box-shadow:0 8px 16px rgba(24,36,52,.18)}
        .nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
        .nav-links a{position:relative;color:#647286;font-size:14px;font-weight:650;transition:.25s}
        .nav-links a:after{content:"";position:absolute;left:0;right:100%;bottom:-9px;height:2px;background:var(--blue);transition:.25s}
        .nav-links a:hover,.nav-links a.active{color:var(--blue)}
        .nav-links a:hover:after,.nav-links a.active:after{right:0}
        .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:750;transition:transform .25s,box-shadow .25s,background .25s}
        .nav-cta{padding:10px 17px;background:#eaf2ff;color:var(--blue);font-size:13px}
        .nav-cta:hover{background:#dceaff;transform:translateY(-2px)}
        .menu-btn{display:none;background:transparent;color:var(--ink);font-size:24px}
        .hero{position:relative;overflow:hidden;background:#f7faff;padding:76px 0 70px}
        .hero:after{content:"";position:absolute;right:-140px;top:-190px;width:560px;height:560px;border:1px solid #dce8f8;border-radius:50%;box-shadow:0 0 0 70px rgba(226,238,253,.5),0 0 0 140px rgba(237,245,254,.75);pointer-events:none}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:72px}
        .hero h1{font-size:clamp(38px,5vw,66px);line-height:1.12;letter-spacing:0;font-weight:900;margin:17px 0 20px;max-width:650px}
        .hero h1 span{color:var(--blue)}
        .hero-lead{font-size:17px;color:#5c6b7f;max-width:650px;margin-bottom:30px}
        .actions{display:flex;flex-wrap:wrap;gap:12px}
        .btn{padding:13px 20px;font-size:14px}
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 22px rgba(23,105,224,.22)}
        .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(23,105,224,.28)}
        .btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}
        .btn-secondary:hover{border-color:#b7cbe7;transform:translateY(-2px);box-shadow:var(--shadow)}
        .hero-note{display:flex;gap:24px;margin-top:36px;padding-top:23px;border-top:1px solid #dfe7f1}
        .hero-note strong{display:block;font-size:21px;line-height:1.1}
        .hero-note span{display:block;color:var(--muted);font-size:12px;margin-top:5px}
        .hero-visual{position:relative;min-height:420px}
        .hero-photo{height:420px;border-radius:24px;box-shadow:var(--shadow-lg);object-position:center}
        .hero-panel{position:absolute;left:-35px;bottom:28px;width:230px;background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:16px;padding:17px;box-shadow:var(--shadow)}
        .status{display:flex;align-items:center;gap:7px;font-size:12px;color:#56806e;font-weight:700}
        .status i{width:8px;height:8px;border-radius:50%;background:#46c58b;display:block}
        .hero-panel h3{font-size:16px;margin:13px 0 8px}
        .mini-line{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;padding-top:8px;border-top:1px solid var(--line)}
        .mini-line b{color:var(--blue)}
        .triple{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .feature{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.25s}
        .feature:hover,.topic-card:hover,.creator:hover,.resource:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
        .feature-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#e9f2ff;color:var(--blue);font-weight:900;margin-bottom:18px}
        .feature:nth-child(2) .feature-icon{background:#e6f8f4;color:#159b88}
        .feature:nth-child(3) .feature-icon{background:#fff1e1;color:#d28b25}
        .feature h3{font-size:18px;margin-bottom:8px}
        .feature p,.topic-card p,.creator p,.resource p{font-size:13px;color:var(--muted)}
        .topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .topic-card{position:relative;overflow:hidden;min-height:230px;border-radius:var(--radius);color:#fff;box-shadow:var(--shadow);transition:.25s}
        .topic-card img{position:absolute;inset:0;height:100%;filter:brightness(.68)}
        .topic-card:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(10,22,39,.87))}
        .topic-content{position:absolute;z-index:1;left:20px;right:20px;bottom:18px}
        .topic-content h3{font-size:18px;margin-bottom:4px}
        .topic-content p{color:#e7edf6}
        .tag{display:inline-flex;align-items:center;padding:4px 9px;border-radius:99px;background:#eef4fd;color:var(--blue);font-size:11px;font-weight:750}
        .tag.light{background:rgba(255,255,255,.18);color:#fff}
        .creator-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .creator{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
        .creator img{height:190px}
        .creator-info{padding:17px}
        .creator-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:7px}
        .creator h3{font-size:17px}
        .creator p{line-height:1.6}
        .creator-meta{display:flex;justify-content:space-between;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
        .creator-meta b{color:var(--blue)}
        .pathway{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
        .path{padding:26px 22px;position:relative}
        .path:not(:last-child):after{content:"→";position:absolute;right:-9px;top:42px;width:19px;height:19px;background:#fff;color:var(--blue);z-index:2;text-align:center;font-weight:800}
        .path-num{font-size:12px;color:var(--blue);font-weight:850}
        .path h3{font-size:17px;margin:12px 0 7px}
        .path p{color:var(--muted);font-size:13px}
        .stats-band{background:var(--ink);color:#fff;padding:52px 0}
        .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
        .stat{border-left:1px solid rgba(255,255,255,.18);padding-left:24px}
        .stat strong{font-size:35px;line-height:1;display:block;color:#fff}
        .stat span{display:block;color:#aab9cb;font-size:13px;margin-top:8px}
        .ranking-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:start}
        .rank-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
        .rank-item{display:grid;grid-template-columns:38px 1fr 90px 48px;align-items:center;gap:12px;padding:15px 20px;border-bottom:1px solid var(--line)}
        .rank-item:last-child{border-bottom:0}
        .rank-no{font-size:19px;font-weight:850;color:#b4c0cf}
        .rank-item:nth-child(-n+3) .rank-no{color:var(--blue)}
        .rank-name{font-weight:750}
        .rank-type{font-size:11px;color:var(--muted);display:block}
        .rank-hot{font-size:12px;color:var(--pink);font-weight:750}
        .rank-score{font-weight:800;color:var(--gold)}
        .quote-box{background:#eaf3ff;border-radius:var(--radius);padding:32px}
        .quote-box blockquote{font-size:22px;line-height:1.55;font-weight:750}
        .quote-box cite{display:block;color:var(--muted);font-size:13px;font-style:normal;margin-top:22px}
        .resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .resource{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s}
        .resource-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px}
        .resource-icon{width:44px;height:44px;border-radius:12px;background:#fff3e5;color:#c48620;display:grid;place-items:center;font-weight:900}
        .resource h3{font-size:17px;margin-bottom:7px}
        .resource a{display:inline-block;color:var(--blue);font-weight:750;font-size:13px;margin-top:15px}
        .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .news{display:grid;grid-template-columns:116px 1fr;gap:15px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:.25s}
        .news:hover{border-color:#bbd0ed;box-shadow:var(--shadow)}
        .news img{height:86px;border-radius:9px}
        .news-date{font-size:11px;color:var(--blue);font-weight:750}
        .news h3{font-size:14px;line-height:1.45;margin-top:5px}
        .faq-list{max-width:900px;margin:0 auto}
        details{border-bottom:1px solid var(--line);padding:20px 0}
        summary{cursor:pointer;list-style:none;font-size:17px;font-weight:750;display:flex;justify-content:space-between;gap:20px}
        summary::-webkit-details-marker{display:none}
        summary:after{content:"+";color:var(--blue);font-size:22px;line-height:1}
        details[open] summary:after{content:"−"}
        details p{color:var(--muted);padding:12px 42px 0 0;font-size:14px}
        .final-cta{background:#eaf3ff;padding:76px 0}
        .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
        .cta-inner h2{font-size:clamp(27px,3.5vw,42px);line-height:1.2;margin-top:10px}
        .cta-inner p{color:var(--muted);margin-top:12px;max-width:610px}
        .footer{background:#111c2b;color:#fff;padding:58px 0 25px}
        .footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px;padding-bottom:42px}
        .footer .brand{color:#fff}
        .footer-intro{color:#9eacbd;font-size:13px;max-width:285px;margin-top:17px}
        .footer h3{font-size:14px;margin-bottom:15px}
        .footer a{display:block;color:#9eacbd;font-size:13px;margin:8px 0;transition:.2s}
        .footer a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:21px;color:#8291a3;font-size:12px;display:flex;justify-content:space-between;gap:20px}
        @media(max-width:1024px){
            .hero-grid{gap:40px}.topic-grid{grid-template-columns:repeat(2,1fr)}.creator-grid{grid-template-columns:repeat(2,1fr)}
            .ranking-wrap{grid-template-columns:1fr}.hero h1{font-size:52px}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 34px))}.section{padding:68px 0}.nav{height:68px}
            .menu-btn{display:block}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:10px 17px 18px;flex-direction:column;align-items:stretch;gap:0;box-shadow:var(--shadow)}
            .nav-links.open{display:flex}.nav-links a{padding:11px 0}.nav-links a:after{display:none}.nav-cta{display:none}
            .hero{padding:54px 0 45px}.hero-grid{grid-template-columns:1fr}.hero-visual{min-height:310px}.hero-photo{height:310px}.hero-panel{left:15px;bottom:15px}
            .hero h1{font-size:43px}.hero-lead{font-size:15px}.section-head{display:block}.section-head p{margin-top:12px}.triple,.pathway,.stats{grid-template-columns:1fr 1fr}
            .path:not(:last-child):after{display:none}.news-grid{grid-template-columns:1fr 1fr}.resource-grid{grid-template-columns:1fr 1fr}.cta-inner{display:block}
            .cta-inner .actions{margin-top:22px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}
        }
        @media(max-width:520px){
            .hero h1{font-size:37px}.hero-note{gap:16px}.topic-grid,.creator-grid,.triple,.pathway,.stats,.resource-grid,.news-grid{grid-template-columns:1fr}
            .topic-card{min-height:210px}.creator img{height:220px}.rank-item{grid-template-columns:30px 1fr 68px 38px;padding:14px 13px}.rank-hot{font-size:11px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:first-child{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:8px}
        }