/* roulang page: index */
:root{
      --ink:#17152b;--muted:#6e6b82;--paper:#faf9ff;--white:#fff;
      --purple:#6748f5;--violet:#9d6cff;--cyan:#27c9c7;--yellow:#ffc857;
      --line:#e9e5f4;--soft:#f1eeff;--deep:#242044;
      --radius:22px;--shadow:0 18px 50px rgba(48,31,103,.11);
      --container:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:Arial,"PingFang SC","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{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .topbar{height:76px;background:rgba(250,249,255,.92);border-bottom:1px solid rgba(233,229,244,.8);position:sticky;top:0;z-index:20;backdrop-filter:blur(16px)}
    .nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;white-space:nowrap}
    .brand-mark{width:37px;height:37px;border-radius:12px;background:linear-gradient(135deg,var(--purple),var(--cyan));display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 8px 16px rgba(103,72,245,.25)}
    .nav-links{display:flex;align-items:center;gap:26px;color:#555169;font-size:14px}
    .nav-links a{transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--purple)}
    .nav-action,.btn{border:0;border-radius:12px;background:var(--purple);color:#fff;padding:11px 18px;font-weight:700;transition:.2s;display:inline-flex;align-items:center;gap:8px}
    .nav-action:hover,.btn:hover{background:#5032db;transform:translateY(-2px);box-shadow:0 10px 22px rgba(103,72,245,.22)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;padding:76px 0 88px;background:#fff}
    .hero:after{content:"";position:absolute;right:-11%;top:-25%;width:61%;height:150%;background:linear-gradient(135deg,#eae4ff,#c8f7f1);clip-path:polygon(18% 0,100% 0,100% 100%,0 100%);z-index:0}
    .hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.03fr .97fr;gap:62px;align-items:center}
    .eyebrow,.section-kicker{color:var(--purple);font-weight:800;letter-spacing:1px;font-size:13px}
    h1{font-size:clamp(36px,5vw,66px);line-height:1.18;letter-spacing:0;margin:14px 0 20px;max-width:680px}
    h1 em{font-style:normal;color:var(--purple);position:relative}
    h1 em:after{content:"";position:absolute;height:9px;background:var(--yellow);left:3px;right:3px;bottom:3px;z-index:-1;border-radius:4px}
    .hero-copy{font-size:17px;color:var(--muted);max-width:650px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:29px}
    .btn.secondary{background:#fff;color:var(--purple);border:1px solid #dcd5ff}
    .btn.secondary:hover{background:var(--soft)}
    .hero-proof{display:flex;gap:28px;margin-top:35px;flex-wrap:wrap}
    .hero-proof strong{display:block;font-size:24px;color:var(--ink);line-height:1.2}
    .hero-proof span{font-size:13px;color:var(--muted)}
    .hero-board{background:var(--deep);color:#fff;border-radius:28px;padding:24px;box-shadow:var(--shadow);transform:rotate(1.5deg)}
    .board-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
    .board-head strong{font-size:18px}.live-dot{color:#6ff0d0;font-size:12px}
    .board-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:12px}
    .board-image{height:226px;border-radius:17px;overflow:hidden;position:relative}
    .board-image img{height:100%}.board-image:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(10,8,30,.8))}
    .board-caption{position:absolute;z-index:1;bottom:15px;left:15px;font-weight:700}
    .board-side{display:grid;gap:12px}.mini-tile{border-radius:16px;background:#35305b;padding:15px}
    .mini-tile b{font-size:25px;display:block;color:#a9fff0}.mini-tile small{color:#c9c5dc}
    section{padding:88px 0}
    section.alt{background:#f2f0fb}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:32px;line-height:1.3;margin-top:8px}
    .section-head p{max-width:570px;color:var(--muted)}
    .text-block{max-width:760px;color:var(--muted);font-size:16px;margin:0 0 33px}
    .pain-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
    .story-panel{background:var(--deep);color:#fff;border-radius:var(--radius);padding:35px;min-height:260px}
    .story-panel h3{font-size:26px;margin-bottom:13px}.story-panel p{color:#cec9e7}
    .check-list{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:22px}
    .check-list li{list-style:none;background:#342e5b;border-radius:10px;padding:10px 13px;color:#e8e4f8}
    .check-list li:before{content:"✓";color:#70efd2;font-weight:bold;margin-right:8px}
    .pain-cards{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .pain-card,.feature-card,.quote,.category-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 26px rgba(48,31,103,.05)}
    .pain-card b{font-size:18px;display:block;margin-bottom:5px}.pain-card p,.feature-card p,.category-card p{color:var(--muted);font-size:14px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden}
    .metric{background:#fff;padding:28px 24px}.metric strong{font-size:34px;color:var(--purple);display:block}.metric span{color:var(--muted)}
    .directory{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .feature-card{border-top:4px solid var(--cyan)}.feature-card:nth-child(2){border-top-color:var(--purple)}.feature-card:nth-child(3){border-top-color:var(--yellow)}.feature-card:nth-child(4){border-top-color:#ee83aa}
    .feature-icon{font-size:25px;margin-bottom:13px}
    .feature-card h3{font-size:18px;margin-bottom:6px}
    .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .content-card{background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line);transition:.25s}
    .content-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .content-card img{height:145px}.card-body{padding:15px}.card-body h3{font-size:16px;line-height:1.4;margin:8px 0}.meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.tag{display:inline-block;color:var(--purple);background:var(--soft);border-radius:7px;padding:2px 7px;font-size:11px;font-weight:700}
    .recommend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .recommend{min-height:275px;border-radius:22px;padding:27px;color:#fff;position:relative;overflow:hidden;background:linear-gradient(135deg,#4c36c9,#8c60ee)}
    .recommend:nth-child(2){background:linear-gradient(135deg,#007f8a,#26c9bd)}.recommend:nth-child(3){background:linear-gradient(135deg,#9c4c70,#e98b85)}
    .recommend:after{content:"";position:absolute;right:-30px;bottom:-45px;width:150px;height:150px;border:25px solid rgba(255,255,255,.14);border-radius:50%}
    .recommend h3{font-size:24px;margin:16px 0 7px}.recommend p{color:#eee;max-width:300px;font-size:14px}.recommend .tag{background:rgba(255,255,255,.18);color:#fff}
    .category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.category-card{min-height:175px}.category-card h3{font-size:19px;margin:9px 0 7px}.category-card .arrow{color:var(--purple);font-weight:700}
    .ranking{background:var(--deep);color:#fff}.ranking .section-head p{color:#c4bfdc}.ranking .section-kicker{color:#7ef1d6}
    .rank-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:25px}.top-rank{background:#393261;border:1px solid #514976;border-radius:22px;padding:27px}.rank-title{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #554e75;padding-bottom:17px;margin-bottom:20px}.rank-title h3{font-size:21px}.score{font-size:29px;color:var(--yellow);font-weight:800}.stars{color:var(--yellow);letter-spacing:2px}.rank-list{display:grid;gap:10px}.rank-item{display:grid;grid-template-columns:46px 1fr auto auto;gap:10px;align-items:center;padding:13px 15px;background:#302a53;border-radius:12px}.rank-item b:first-child{font-size:20px;color:#8df0da}.rank-item span{color:#c4bfdc;font-size:13px}.comparison{background:#fff;border-radius:20px;padding:25px;color:var(--ink)}.comparison h3{margin-bottom:14px}.compare-line{display:flex;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.compare-line b{color:var(--purple)}
    .scenario-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.scenario{background:#fff;border-radius:18px;padding:21px;border:1px solid var(--line)}.scenario span{font-size:28px}.scenario h3{margin:10px 0 5px}.scenario p{font-size:13px;color:var(--muted)}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.news{display:grid;grid-template-columns:105px 1fr;gap:14px;background:#fff;border-radius:15px;padding:11px;border:1px solid var(--line)}.news img{height:83px;border-radius:10px}.news h3{font-size:15px;line-height:1.45}.news time{font-size:12px;color:var(--muted)}
    .quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.quote{position:relative}.quote:before{content:"“";font-size:52px;color:#c9bfff;line-height:1}.quote p{color:#545066;margin:4px 0 16px}.quote strong{font-size:14px}.quote small{display:block;color:var(--muted)}
    .security{display:grid;grid-template-columns:.85fr 1.15fr;gap:25px;align-items:stretch}.security-copy{background:#e5fbf7;border-radius:22px;padding:34px}.security-copy h2{font-size:28px;margin:10px 0}.security-copy p{color:#56706f}.security-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.security-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.security-item b{display:block;margin-bottom:6px}.security-item span{font-size:13px;color:var(--muted)}
    .faq-list{max-width:850px;margin:auto;display:grid;gap:12px}.faq{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px}.faq summary{font-weight:700;cursor:pointer}.faq p{color:var(--muted);padding-top:10px;font-size:14px}
    .cta{padding:72px 0;background:linear-gradient(120deg,#4733b8,#754df0);color:#fff;text-align:center}.cta h2{font-size:34px;margin-bottom:12px}.cta p{max-width:650px;margin:0 auto 25px;color:#e5e0ff}.cta .btn{background:#fff;color:var(--purple)}.cta .btn:hover{background:#eafcf9;color:var(--deep)}
    footer{background:#171431;color:#d3cfea;padding:55px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:38px}.footer-brand{color:#fff;font-size:18px;font-weight:800;margin-bottom:12px}.footer-grid p{font-size:13px;color:#9892b5;max-width:290px}.footer-grid h4{color:#fff;margin-bottom:13px}.footer-grid a{display:block;font-size:13px;color:#aaa5c0;margin:7px 0;transition:.2s}.footer-grid a:hover{color:#70efd2}.copyright{border-top:1px solid #322c51;padding-top:18px;font-size:12px;color:#817b9b;display:flex;justify-content:space-between;gap:15px}
    :focus-visible{outline:3px solid #7eeede;outline-offset:3px}
    @media(max-width:1024px){.hero-inner{gap:30px}.directory,.scenario-wrap{grid-template-columns:repeat(2,1fr)}.content-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr}.rank-grid,.security{grid-template-columns:1fr}.pain-grid{grid-template-columns:1fr}}
    @media(max-width:768px){.container{width:min(100% - 30px,600px)}.nav-links{display:none;position:absolute;left:15px;right:15px;top:68px;background:#fff;padding:15px;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}.nav-links.open{display:flex}.nav-links a{padding:9px 8px}.nav-action{display:none}.menu-btn{display:block}.hero{padding:57px 0 65px}.hero:after{width:100%;height:45%;top:auto;bottom:-10%;clip-path:polygon(20% 0,100% 0,100% 100%,0 100%);opacity:.7}.hero-inner{grid-template-columns:1fr}.hero-board{transform:none}.section-head{display:block}.section-head p{margin-top:12px}.metrics{grid-template-columns:repeat(2,1fr)}.content-grid{grid-template-columns:repeat(2,1fr)}.recommend-grid,.category-grid,.news-grid,.quotes{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:520px){body{font-size:14px}section{padding:60px 0}h1{font-size:38px}.hero-copy{font-size:15px}.hero-actions .btn{width:100%;justify-content:center}.hero-proof{gap:18px}.board-grid{grid-template-columns:1fr}.board-side{grid-template-columns:1fr 1fr}.directory,.scenario-wrap,.recommend-grid,.category-grid,.news-grid,.quotes,.security-list{grid-template-columns:1fr}.content-grid{grid-template-columns:1fr 1fr;gap:12px}.content-card img{height:112px}.card-body{padding:11px}.card-body h3{font-size:14px}.rank-item{grid-template-columns:34px 1fr auto}.rank-item span{display:none}.check-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-grid>div:first-child{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:8px}}