/* roulang page: index */
:root{
      --blue:#2563eb;
      --blue-dark:#1747b8;
      --cyan:#0ea5c9;
      --ink:#14213d;
      --muted:#64748b;
      --soft:#f4f8ff;
      --line:#dce7f5;
      --white:#fff;
      --orange:#f59e0b;
      --radius:18px;
      --shadow:0 14px 40px rgba(36,78,135,.10);
      --shadow-hover:0 20px 50px rgba(36,78,135,.16);
      --container:1220px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.7;font-size:16px;overflow-x:hidden}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(37,99,235,.35);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:13px;font-weight:700;letter-spacing:.08em;margin-bottom:14px}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--blue);border-radius:2px}
    h1,h2,h3{line-height:1.25;letter-spacing:-.02em}
    h1{font-size:clamp(38px,5vw,62px)}
    h2{font-size:clamp(28px,3.3vw,40px)}
    h3{font-size:20px}
    .section{padding:104px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:42px}
    .section-head p{max-width:620px;color:var(--muted);font-size:16px}
    .btn{display:inline-flex;justify-content:center;align-items:center;gap:9px;min-height:48px;padding:0 22px;border-radius:11px;border:1px solid transparent;font-weight:700;transition:.25s ease;white-space:nowrap}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 22px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(37,99,235,.28)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cfe0fb}
    .btn-light:hover{background:#eef5ff;border-color:var(--blue);transform:translateY(-2px)}
    .btn-ghost{color:var(--blue);font-weight:700}
    .btn-ghost:hover{color:var(--blue-dark);transform:translateX(3px)}
    .tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:99px;background:#edf5ff;color:var(--blue);font-size:12px;font-weight:700}
    .tag.orange{background:#fff5df;color:#a56800}
    .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.25s ease}
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#c7dbf7}
    
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:.25s}
    .site-header.scrolled{border-color:var(--line);box-shadow:0 8px 24px rgba(40,80,130,.06)}
    .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;min-width:235px;font-size:18px;font-weight:800;color:var(--ink)}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(145deg,#3b82f6,#0ea5c9);position:relative;box-shadow:0 8px 16px rgba(37,99,235,.22)}
    .brand-mark:after{content:"";position:absolute;left:15px;top:11px;border-left:12px solid #fff;border-top:8px solid transparent;border-bottom:8px solid transparent}
    .main-nav{display:flex;align-items:center;gap:5px;flex:1}
    .main-nav a{padding:10px 13px;border-radius:9px;color:#52627b;font-size:14px;font-weight:600;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:var(--blue);background:#edf5ff}
    .nav-action{min-height:42px;padding:0 17px}
    .menu-toggle{display:none;border:0;background:#eef5ff;color:var(--blue);width:44px;height:44px;border-radius:10px;font-size:22px}
    
    .hero{position:relative;min-height:650px;padding:78px 0 92px;overflow:hidden;background:#f5f9ff url('/assets/images/a04a8394f3d844b7.jpg') center/cover no-repeat}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(247,251,255,.98) 0%,rgba(247,251,255,.88) 45%,rgba(247,251,255,.28) 100%)}
    .hero:after{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(37,99,235,.12);border-radius:50%;right:-160px;top:75px}
    .hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.02fr .98fr;gap:62px;align-items:center}
    .hero-copy{max-width:650px}
    .hero h1{margin-bottom:22px;color:#10244a}
    .hero h1 em{font-style:normal;color:var(--blue)}
    .hero-copy>p{font-size:18px;color:#52627b;max-width:620px;margin-bottom:30px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:13px;margin-bottom:30px}
    .hero-note{display:flex;gap:20px;flex-wrap:wrap;color:#667892;font-size:13px}
    .hero-note span{display:flex;align-items:center;gap:7px}
    .hero-note i{width:7px;height:7px;border-radius:50%;background:#22c55e}
    .hero-panel{position:relative;min-height:390px;border:10px solid rgba(255,255,255,.7);border-radius:24px;overflow:hidden;box-shadow:0 24px 60px rgba(43,83,140,.22);background:#173b79}
    .hero-panel img{width:100%;height:100%;min-height:370px;object-fit:cover;opacity:.78}
    .panel-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,34,77,.15),rgba(10,34,77,.8))}
    .panel-top{position:absolute;left:22px;right:22px;top:20px;display:flex;justify-content:space-between;align-items:center;color:#fff;font-size:13px}
    .live-status{display:flex;align-items:center;gap:7px;background:rgba(255,255,255,.17);padding:7px 11px;border-radius:99px}
    .live-status i{width:7px;height:7px;background:#5eead4;border-radius:50%;box-shadow:0 0 0 4px rgba(94,234,212,.18)}
    .play-button{position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.2);color:#fff;font-size:28px;padding-left:5px;backdrop-filter:blur(5px)}
    .play-button:hover{background:#fff;color:var(--blue);transform:translate(-50%,-50%) scale(1.05)}
    .panel-bottom{position:absolute;left:24px;right:24px;bottom:22px;color:#fff}
    .panel-bottom h3{font-size:24px;margin:12px 0 13px}
    .progress{height:4px;background:rgba(255,255,255,.3);border-radius:4px;overflow:hidden}
    .progress span{display:block;width:68%;height:100%;background:#67e8f9}
    
    .matrix{background:#fff}
    .matrix-grid{display:grid;grid-template-columns:1.3fr .9fr .9fr 1.1fr;gap:16px}
    .matrix-card{padding:27px;min-height:188px;position:relative;overflow:hidden}
    .matrix-card.featured{grid-row:span 2;background:#eef6ff;border-color:#cfe1fb}
    .matrix-card .number{font-size:12px;color:#8aa0bc;font-weight:800;letter-spacing:.08em}
    .icon-box{width:42px;height:42px;border-radius:12px;background:#e3efff;color:var(--blue);display:grid;place-items:center;font-size:21px;margin:18px 0 14px}
    .matrix-card h3{margin-bottom:8px}
    .matrix-card p{color:var(--muted);font-size:14px;line-height:1.65}
    .matrix-card .arrow{position:absolute;right:24px;bottom:25px;color:var(--blue);font-size:20px}
    
    .stats-section{background:var(--soft)}
    .stats-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:stretch}
    .stat-intro{padding:36px;border-radius:var(--radius);background:linear-gradient(145deg,#2463d9,#3d8fe5);color:#fff;position:relative;overflow:hidden}
    .stat-intro:after{content:"";position:absolute;width:220px;height:220px;border:1px solid rgba(255,255,255,.25);border-radius:50%;right:-90px;bottom:-80px}
    .stat-intro p{color:#d9e9ff;margin-top:18px;font-size:15px}
    .stat-intro .mini-label{display:inline-block;margin-top:35px;font-size:12px;color:#d9e9ff}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .stat-card{padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
    .stat-card strong{font-size:34px;color:var(--blue);display:block;line-height:1.2}
    .stat-card b{font-size:15px;display:block;margin:10px 0 6px}
    .stat-card span{font-size:13px;color:var(--muted)}
    .stat-line{height:6px;border-radius:6px;background:#e9f1fb;margin-top:18px;overflow:hidden}
    .stat-line i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#67c7e8);border-radius:6px}
    
    .process{background:#fff}
    .process-track{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
    .process-track:before{content:"";position:absolute;top:29px;left:10%;right:10%;height:1px;background:#c8dcf5}
    .process-step{position:relative;padding:0 18px;text-align:center}
    .step-no{position:relative;z-index:1;margin:0 auto 23px;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:#fff;border:7px solid #e7f1ff;color:var(--blue);font-weight:800;box-shadow:0 0 0 1px #bcd5f4}
    .process-step h3{font-size:18px;margin-bottom:9px}
    .process-step p{font-size:14px;color:var(--muted)}
    
    .topics{background:#f8fbff}
    .topic-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .topic-main{min-height:375px;position:relative;border-radius:var(--radius);overflow:hidden;color:#fff;background:#193c77}
    .topic-main img{width:100%;height:100%;object-fit:cover;opacity:.72}
    .topic-main:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(9,29,66,.84),rgba(9,29,66,0) 65%)}
    .topic-content{position:absolute;z-index:1;left:28px;right:28px;bottom:25px}
    .topic-content h3{font-size:27px;margin:12px 0 8px}
    .topic-content p{color:#dbeafe;font-size:14px}
    .topic-side{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .topic-small{overflow:hidden;position:relative;min-height:178px}
    .topic-small img{width:100%;height:125px;object-fit:cover}
    .topic-small .small-body{padding:14px 16px}
    .topic-small h3{font-size:16px;margin-top:7px}
    .topic-small .tag{font-size:11px}
    
    .updates{background:#fff}
    .updates-layout{display:grid;grid-template-columns:230px 1fr;gap:55px}
    .update-index{border-right:1px solid var(--line);padding-right:25px}
    .update-index strong{font-size:50px;line-height:1;color:var(--blue);display:block}
    .update-index p{color:var(--muted);font-size:14px;margin:10px 0 28px}
    .update-list{display:flex;flex-direction:column}
    .update-item{display:grid;grid-template-columns:115px 1fr auto;gap:20px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
    .update-item:first-child{padding-top:0}
    .update-date{color:#8093ad;font-size:13px}
    .update-item h3{font-size:18px;margin:7px 0 5px}
    .update-item p{font-size:13px;color:var(--muted)}
    .update-arrow{font-size:23px;color:var(--blue)}
    
    .ecosystem{background:#f4f8ff}
    .ecosystem-box{padding:45px 50px;background:#fff;border:1px solid var(--line);border-radius:22px;display:flex;align-items:center;gap:45px}
    .eco-copy{max-width:400px}
    .eco-copy p{color:var(--muted);font-size:14px;margin-top:14px}
    .eco-rail{flex:1;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .eco-node{min-height:100px;border:1px dashed #b9cde8;border-radius:14px;display:flex;align-items:center;justify-content:center;text-align:center;color:#526b8d;font-weight:700;background:#fbfdff;position:relative}
    .eco-node:not(:last-child):after{content:"→";position:absolute;right:-22px;color:#8fb1dc;font-size:20px}
    .eco-node small{display:block;color:#91a4bd;font-size:11px;font-weight:400;margin-top:4px}
    
    .faq{background:#fff}
    .faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:65px}
    .faq-intro p{color:var(--muted);margin-top:18px}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-question{width:100%;border:0;background:transparent;text-align:left;padding:21px 5px;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:700;font-size:16px}
    .faq-question span:last-child{font-size:24px;color:var(--blue);transition:.2s}
    .faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 5px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{max-height:150px;padding-bottom:20px}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    
    .assurance{padding:25px 0;background:#102b57;color:#fff}
    .assurance-grid{display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:28px;align-items:center}
    .assurance-title{font-size:19px;font-weight:800}
    .assurance-item{display:flex;align-items:center;gap:12px;color:#d9e8fb;font-size:13px}
    .assurance-item b{font-size:21px;color:#71d5ef}
    
    .cta{padding:90px 0;background:#eaf4ff}
    .cta-box{border-radius:24px;padding:48px 55px;background:linear-gradient(110deg,#dceeff,#f5faff);border:1px solid #c7def7;display:flex;justify-content:space-between;gap:30px;align-items:center}
    .cta-box p{color:var(--muted);margin-top:13px;max-width:620px}
    .cta-actions{display:flex;gap:12px;flex-shrink:0}
    
    .site-footer{background:#f7faff;border-top:1px solid var(--line);padding:45px 0 24px}
    .footer-top{display:flex;justify-content:space-between;gap:35px;padding-bottom:35px}
    .footer-brand p{color:var(--muted);font-size:13px;margin-top:12px;max-width:340px}
    .footer-links{display:flex;gap:44px}
    .footer-col strong{font-size:14px}
    .footer-col a{display:block;color:var(--muted);font-size:13px;margin-top:9px}
    .footer-col a:hover{color:var(--blue)}
    .footer-bottom{border-top:1px solid var(--line);padding-top:20px;color:#8a9ab0;font-size:12px;display:flex;justify-content:space-between;gap:15px}
    
    @media(max-width:1024px){
      .main-nav{gap:0}.main-nav a{padding:9px 8px;font-size:13px}.brand{min-width:205px}
      .hero-inner,.stats-layout,.topic-layout,.faq-layout{grid-template-columns:1fr}
      .hero-panel{max-width:680px;width:100%;margin:auto}
      .matrix-grid{grid-template-columns:repeat(2,1fr)}
      .matrix-card.featured{grid-row:auto}
      .eco-rail{grid-template-columns:repeat(3,1fr)}
      .assurance-grid{grid-template-columns:repeat(3,1fr)}.assurance-title{grid-column:1/-1}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .section{padding:70px 0}.section-head{display:block;margin-bottom:30px}.section-head p{margin-top:14px}
      .nav-wrap{height:68px}.brand{flex:1;min-width:0;font-size:16px}.brand-mark{width:34px;height:34px}.brand-mark:after{left:13px;top:9px}
      .menu-toggle{display:block}.nav-action{display:none}
      .main-nav{display:none;position:absolute;left:17px;right:17px;top:76px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}.main-nav a{padding:13px 14px}
      .hero{padding:62px 0 68px;min-height:auto}.hero-inner{gap:38px}.hero-copy>p{font-size:16px}.hero-panel{min-height:320px}.hero-panel img{min-height:300px}
      .matrix-grid,.stat-grid{grid-template-columns:1fr}.matrix-card{min-height:170px}
      .process-track{grid-template-columns:1fr;gap:27px}.process-track:before{left:29px;top:29px;bottom:29px;width:1px;height:auto;right:auto}.process-step{text-align:left;padding-left:82px;min-height:59px}.step-no{position:absolute;left:0;top:0;margin:0}.process-step p{max-width:430px}
      .topic-side{grid-template-columns:1fr 1fr}.topic-main{min-height:300px}
      .updates-layout{grid-template-columns:1fr;gap:20px}.update-index{border-right:0;border-bottom:1px solid var(--line);padding:0 0 20px}.update-index strong{font-size:40px}
      .update-item{grid-template-columns:78px 1fr auto;gap:10px}.update-item h3{font-size:16px}.update-item p{display:none}
      .ecosystem-box{display:block;padding:30px 24px}.eco-rail{margin-top:28px}
      .assurance-grid{grid-template-columns:1fr 1fr}.assurance-title{grid-column:1/-1}
      .cta-box{display:block;padding:35px 25px}.cta-actions{margin-top:24px}
      .footer-top{display:block}.footer-links{margin-top:28px;gap:30px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
    }
    @media(max-width:520px){
      h1{font-size:36px}.hero-actions,.cta-actions{flex-direction:column;align-items:stretch}.btn{width:100%}
      .topic-side{grid-template-columns:1fr}.topic-small img{height:150px}
      .eco-rail{grid-template-columns:1fr}.eco-node:not(:last-child):after{content:"↓";right:auto;bottom:-24px;top:auto;left:50%}
      .assurance-grid{grid-template-columns:1fr}.assurance-title{grid-column:auto}
      .footer-links{display:grid;grid-template-columns:1fr 1fr}
    }