/* roulang page: index */
:root{
      --primary:#4f63ff;
      --primary-dark:#2636bd;
      --secondary:#ffb545;
      --bg:#f6f8ff;
      --surface:#ffffff;
      --surface-soft:#eef3ff;
      --text:#182033;
      --muted:#667085;
      --line:rgba(24,32,51,.10);
      --line-strong:rgba(24,32,51,.16);
      --radius:28px;
      --radius-sm:18px;
      --shadow:0 20px 60px rgba(31,45,92,.12);
      --shadow-hover:0 26px 80px rgba(31,45,92,.18);
      --focus:0 0 0 4px rgba(79,99,255,.18);
      --nav-h:76px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(79,99,255,.16), transparent 28%),
        radial-gradient(circle at 90% 0%, rgba(255,181,69,.18), transparent 22%),
        linear-gradient(180deg,#fbfcff 0%,#f6f8ff 46%,#ffffff 100%);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      line-height:1.7;
      text-rendering:optimizeLegibility;
      overflow-x:hidden;
      padding-bottom:84px;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(79,99,255,.18)}
    .site-container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .glass{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(255,255,255,.7);
      box-shadow:var(--shadow);
      backdrop-filter:blur(18px);
    }
    .topbar{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(246,248,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(24,32,51,.08);
    }
    .nav-wrap{
      height:var(--nav-h);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--primary),#8b5cf6 54%,var(--secondary));
      box-shadow:0 14px 34px rgba(79,99,255,.28);
      letter-spacing:-.03em;
    }
    .brand-name{font-weight:900;font-size:20px;letter-spacing:-.04em}
    .nav-center{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      padding:8px;
      border:1px solid rgba(24,32,51,.08);
      border-radius:999px;
      background:rgba(255,255,255,.66);
    }
    .nav-link{
      display:inline-flex;
      align-items:center;
      min-height:38px;
      padding:0 16px;
      border-radius:999px;
      color:#475467;
      font-weight:700;
      transition:.22s ease;
    }
    .nav-link:hover{background:#fff;color:var(--primary-dark);box-shadow:0 8px 22px rgba(31,45,92,.08);transform:translateY(-1px)}
    .nav-link.active{background:var(--primary);color:#fff;box-shadow:0 12px 28px rgba(79,99,255,.26)}
    .nav-actions{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
    }
    .location-pill{
      display:inline-flex;align-items:center;gap:8px;
      padding:10px 14px;border-radius:999px;
      border:1px solid rgba(24,32,51,.10);
      background:#fff;color:#344054;font-weight:700;
      transition:.22s ease;
    }
    .location-pill:hover{border-color:rgba(79,99,255,.35);box-shadow:0 10px 28px rgba(31,45,92,.10)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:46px;padding:0 18px;border-radius:999px;
      font-weight:850;border:1px solid transparent;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
      white-space:nowrap;
    }
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),#7c3aed);box-shadow:0 14px 34px rgba(79,99,255,.26)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 44px rgba(79,99,255,.34)}
    .btn-secondary{color:var(--primary-dark);background:#fff;border-color:rgba(79,99,255,.18)}
    .btn-secondary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(31,45,92,.10);border-color:rgba(79,99,255,.35)}
    .btn-dark{background:#182033;color:#fff;box-shadow:0 16px 38px rgba(24,32,51,.22)}
    .btn-dark:hover{transform:translateY(-2px);background:#0f172a}
    .btn:focus-visible,.nav-link:focus-visible,.location-pill:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none;box-shadow:var(--focus)}
    .mobile-menu-btn{display:none;width:44px;height:44px;border-radius:16px;border:1px solid rgba(24,32,51,.10);background:#fff}
    .mobile-menu{display:none}
    .hero{
      position:relative;
      padding:72px 0 54px;
      overflow:hidden;
    }
    .hero:before{
      content:"";
      position:absolute;inset:22px auto auto 50%;
      width:760px;height:280px;transform:translateX(-50%);
      background:linear-gradient(90deg,rgba(79,99,255,.22),rgba(255,181,69,.22),rgba(124,58,237,.14));
      filter:blur(58px);border-radius:999px;z-index:-1;
    }
    .hero-card{
      position:relative;
      border-radius:36px;
      padding:42px;
      background:
        linear-gradient(135deg,rgba(255,255,255,.92),rgba(255,255,255,.74)),
        radial-gradient(circle at 12% 10%,rgba(79,99,255,.20),transparent 28%);
      border:1px solid rgba(255,255,255,.76);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .wave{
      position:absolute;left:0;right:0;bottom:-6px;height:88px;opacity:.55;pointer-events:none;
      background:
        radial-gradient(80px 30px at 4% 80%,rgba(79,99,255,.20),transparent 70%),
        radial-gradient(120px 40px at 20% 76%,rgba(255,181,69,.18),transparent 70%),
        radial-gradient(90px 30px at 44% 78%,rgba(79,99,255,.18),transparent 70%),
        radial-gradient(120px 40px at 70% 82%,rgba(124,58,237,.16),transparent 70%);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:rgba(79,99,255,.10);color:var(--primary-dark);
      font-size:14px;font-weight:850;border:1px solid rgba(79,99,255,.14);
    }
    .hero-title{
      margin:18px auto 0;
      max-width:980px;
      font-size:clamp(34px,5vw,66px);
      line-height:1.06;
      letter-spacing:-.06em;
      font-weight:950;
      color:#111827;
    }
    .hero-title .grad{
      background:linear-gradient(135deg,var(--primary),#7c3aed 56%,#f59e0b);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-desc{
      max-width:850px;
      margin:20px auto 0;
      color:#566176;
      font-size:18px;
      line-height:1.85;
    }
    .search-panel{
      max-width:860px;margin:30px auto 0;
      display:grid;grid-template-columns:1fr auto;
      gap:12px;padding:10px;
      border-radius:999px;background:#fff;
      border:1px solid rgba(24,32,51,.10);
      box-shadow:0 22px 58px rgba(31,45,92,.12);
    }
    .search-input{
      border:0;outline:0;padding:0 18px;min-height:54px;
      background:transparent;color:#182033;font-weight:700;
    }
    .search-input::placeholder{color:#98a2b3;font-weight:650}
    .quick-tags{
      display:flex;flex-wrap:wrap;justify-content:center;gap:10px;
      margin:20px auto 0;max-width:900px;
    }
    .tag{
      display:inline-flex;align-items:center;gap:7px;
      padding:9px 13px;border-radius:999px;
      background:rgba(255,255,255,.70);
      border:1px solid rgba(24,32,51,.09);
      color:#475467;font-size:14px;font-weight:750;
      transition:.22s ease;
    }
    .tag:hover{background:#fff;color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(31,45,92,.10)}
    .hero-metrics{
      display:grid;grid-template-columns:repeat(3,1fr);
      gap:14px;max-width:820px;margin:28px auto 0;
    }
    .metric{
      padding:18px;border-radius:24px;background:rgba(255,255,255,.70);
      border:1px solid rgba(24,32,51,.08);
      text-align:left;
    }
    .metric strong{display:block;font-size:26px;line-height:1;color:#182033;font-weight:950}
    .metric span{display:block;margin-top:8px;color:#667085;font-size:14px;font-weight:700}
    main section{padding:58px 0}
    .section-head{
      display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
      margin-bottom:24px;
    }
    .section-kicker{
      color:var(--primary-dark);font-weight:900;font-size:14px;letter-spacing:.08em;
    }
    .section-title{
      margin-top:6px;
      font-size:clamp(26px,3vw,42px);
      line-height:1.18;
      letter-spacing:-.04em;
      font-weight:950;
    }
    .section-desc{
      max-width:650px;
      color:#667085;
      margin-top:10px;
      font-size:16px;
      line-height:1.8;
    }
    .card{
      border-radius:var(--radius);
      background:#fff;
      border:1px solid rgba(24,32,51,.09);
      box-shadow:0 16px 46px rgba(31,45,92,.08);
      transition:.24s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(79,99,255,.18)}
    .commission-grid{
      display:grid;grid-template-columns:1.15fr .85fr;
      gap:22px;
    }
    .commission-main{
      padding:30px;
      background:
        linear-gradient(135deg,#182033,#24315a 58%,#4f63ff);
      color:#fff;
      overflow:hidden;
      position:relative;
    }
    .commission-main:after{
      content:"";position:absolute;right:-70px;top:-80px;width:240px;height:240px;
      border-radius:999px;background:rgba(255,181,69,.24);
    }
    .badge{
      display:inline-flex;align-items:center;gap:7px;
      padding:7px 11px;border-radius:999px;
      background:rgba(255,255,255,.16);
      border:1px solid rgba(255,255,255,.24);
      color:inherit;font-size:13px;font-weight:850;
    }
    .commission-title{font-size:34px;line-height:1.18;font-weight:950;letter-spacing:-.04em;margin-top:16px}
    .commission-text{color:rgba(255,255,255,.78);margin-top:14px;max-width:650px}
    .data-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
    .data-badge{
      min-width:136px;padding:16px;border-radius:22px;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.22);
    }
    .data-badge b{display:block;font-size:26px;line-height:1;font-weight:950}
    .data-badge small{display:block;margin-top:8px;color:rgba(255,255,255,.72);font-weight:700}
    .commission-side{display:grid;gap:16px}
    .mini-card{padding:22px}
    .mini-card h3{font-size:19px;font-weight:950;letter-spacing:-.02em}
    .mini-card p{margin-top:8px;color:#667085;font-size:15px}
    .material-wrap{
      display:grid;grid-template-columns:.85fr 1.15fr;
      gap:22px;align-items:stretch;
    }
    .cover-card{
      padding:28px;min-height:430px;position:relative;overflow:hidden;
      background:linear-gradient(145deg,#eef3ff,#ffffff 56%,#fff4df);
    }
    .cover-art{
      position:absolute;right:26px;bottom:24px;width:210px;height:260px;
      border-radius:30px;background:linear-gradient(135deg,#4f63ff,#7c3aed);
      box-shadow:0 28px 60px rgba(79,99,255,.30);
      transform:rotate(4deg);
      padding:24px;color:#fff;
    }
    .cover-art:before{
      content:"";position:absolute;left:22px;right:22px;top:86px;height:8px;border-radius:99px;background:rgba(255,255,255,.58);
      box-shadow:0 26px 0 rgba(255,255,255,.38),0 52px 0 rgba(255,255,255,.25);
    }
    .cover-art strong{font-size:30px;font-weight:950;line-height:1.1}
    .toc-list{display:grid;gap:14px}
    .toc-item{
      display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;
      padding:18px;border-radius:22px;background:#fff;
      border:1px solid rgba(24,32,51,.08);
      transition:.22s ease;
    }
    .toc-item:hover{border-color:rgba(79,99,255,.22);box-shadow:0 12px 34px rgba(31,45,92,.08);transform:translateX(3px)}
    .toc-num{
      width:38px;height:38px;border-radius:14px;display:grid;place-items:center;
      background:rgba(79,99,255,.10);color:var(--primary-dark);font-weight:950;
    }
    .toc-item h3{font-weight:950;font-size:17px}
    .toc-item p{font-size:14px;color:#667085;margin-top:3px}
    .arrow{color:#98a2b3;font-weight:950}
    .news-layout{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;
    }
    .news-list{padding:12px}
    .news-row{
      display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;
      padding:18px;border-radius:22px;
      transition:.22s ease;
    }
    .news-row + .news-row{border-top:1px solid rgba(24,32,51,.07)}
    .news-row:hover{background:#f7f9ff}
    .news-date{
      width:64px;height:64px;border-radius:20px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(79,99,255,.12),rgba(255,181,69,.18));
      color:#344054;font-weight:950;line-height:1.1;text-align:center;
    }
    .news-date span{display:block;font-size:13px;color:#667085;font-weight:800}
    .news-row h3{font-size:18px;font-weight:950;letter-spacing:-.02em}
    .news-row p{margin-top:4px;color:#667085;font-size:14px}
    .recommend{padding:24px;background:linear-gradient(145deg,#182033,#3347e8);color:#fff}
    .recommend p{color:rgba(255,255,255,.76)}
    .recommend-list{margin-top:18px;display:grid;gap:12px}
    .recommend-item{
      padding:14px;border-radius:18px;background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.16);
    }
    .calendar-strip{
      display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
    }
    .calendar-card{padding:22px;position:relative;overflow:hidden}
    .calendar-card:before{
      content:"";position:absolute;left:0;right:0;top:0;height:5px;
      background:linear-gradient(90deg,var(--primary),var(--secondary));
    }
    .calendar-day{font-size:14px;color:var(--primary-dark);font-weight:950}
    .calendar-card h3{font-size:18px;font-weight:950;margin-top:8px}
    .calendar-card p{font-size:14px;color:#667085;margin-top:8px}
    .opinion-grid{
      display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px;
    }
    .quote-card{padding:24px;background:#fff}
    .quote-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;background:#f0f3ff;color:var(--primary-dark);
      font-size:24px;font-weight:950;margin-bottom:16px;
    }
    .quote-card p{color:#475467}
    .quote-card h3{font-size:18px;font-weight:950;margin-top:16px}
    .milestone{
      display:grid;grid-template-columns:repeat(4,1fr);gap:0;
      overflow:hidden;border-radius:var(--radius);border:1px solid rgba(24,32,51,.09);
      background:#fff;box-shadow:0 16px 46px rgba(31,45,92,.08);
    }
    .mile{
      padding:26px;border-right:1px solid rgba(24,32,51,.08);
      position:relative;
    }
    .mile:last-child{border-right:0}
    .mile:before{
      content:"";position:absolute;left:26px;top:74px;width:12px;height:12px;border-radius:99px;
      background:var(--primary);box-shadow:0 0 0 8px rgba(79,99,255,.12);
    }
    .mile time{font-weight:950;color:var(--primary-dark)}
    .mile h3{font-size:18px;font-weight:950;margin-top:30px}
    .mile p{font-size:14px;color:#667085;margin-top:8px}
    .faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px}
    .faq-intro{padding:28px;background:linear-gradient(145deg,#fff,#eef3ff)}
    .faq-list{display:grid;gap:14px}
    details{
      padding:20px 22px;border-radius:22px;background:#fff;
      border:1px solid rgba(24,32,51,.09);
      box-shadow:0 10px 30px rgba(31,45,92,.06);
    }
    details[open]{border-color:rgba(79,99,255,.22);box-shadow:0 16px 40px rgba(31,45,92,.10)}
    summary{list-style:none;cursor:pointer;font-weight:950;color:#182033;display:flex;justify-content:space-between;gap:18px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--primary);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{margin-top:12px;color:#667085;font-size:15px;line-height:1.85}
    .join{
      padding:34px;
      border-radius:36px;
      background:
        radial-gradient(circle at 10% 10%,rgba(255,181,69,.25),transparent 28%),
        linear-gradient(135deg,#4f63ff,#7c3aed 54%,#182033);
      color:#fff;
      box-shadow:var(--glow);
      overflow:hidden;
      position:relative;
    }
    .join-grid{display:grid;grid-template-columns:1fr 420px;gap:28px;align-items:center}
    .join h2{font-size:clamp(28px,4vw,46px);font-weight:950;line-height:1.14;letter-spacing:-.05em}
    .join p{color:rgba(255,255,255,.78);margin-top:14px;max-width:720px}
    .lead-form{
      padding:20px;border-radius:28px;background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.18);
      backdrop-filter:blur(14px);
      display:grid;gap:12px;
    }
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{
      width:100%;min-height:48px;border-radius:16px;border:1px solid rgba(255,255,255,.18);
      background:rgba(255,255,255,.92);padding:0 14px;color:#182033;font-weight:700;
    }
    .field::placeholder{color:#98a2b3}
    .form-note{font-size:13px;color:rgba(255,255,255,.70)}
    .site-footer{
      background:#101828;color:#d0d5dd;margin-top:32px;padding:52px 0 96px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-grid{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:start}
    .footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-size:20px;font-weight:950}
    .footer-desc{max-width:680px;margin-top:14px;color:#98a2b3}
    .footer-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{
      padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.06);
      color:#d0d5dd;border:1px solid rgba(255,255,255,.08);font-weight:750;
    }
    .footer-links a:hover{background:rgba(255,255,255,.12);color:#fff}
    .copyright{margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);color:#98a2b3;font-size:14px}
    .sticky-cta{
      position:fixed;left:50%;bottom:16px;transform:translateX(-50%);
      width:min(980px,calc(100% - 28px));
      z-index:60;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:12px 14px 12px 18px;border-radius:999px;
      background:rgba(24,32,51,.92);color:#fff;
      border:1px solid rgba(255,255,255,.16);
      box-shadow:0 18px 60px rgba(16,24,40,.32);
      backdrop-filter:blur(16px);
    }
    .sticky-cta strong{font-weight:950}
    .sticky-cta span{color:#d0d5dd;font-size:14px;margin-left:8px}
    .sticky-cta .btn{min-height:42px;padding:0 16px}
    .countdown{
      display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;
      background:rgba(255,181,69,.16);border:1px solid rgba(255,181,69,.25);color:#fff;font-weight:850;
    }
    @media (max-width:1024px){
      .nav-center{display:none}
      .mobile-menu-btn{display:grid;place-items:center}
      .mobile-menu.open{
        display:block;padding:0 0 16px;
      }
      .mobile-menu .site-container{
        display:grid;gap:10px;
      }
      .mobile-menu a,.mobile-menu .location-pill{
        justify-content:center;width:100%;
      }
      .commission-grid,.material-wrap,.news-layout,.faq-grid,.join-grid{grid-template-columns:1fr}
      .calendar-strip,.milestone{grid-template-columns:repeat(2,1fr)}
      .opinion-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:768px){
      body{padding-bottom:118px}
      .site-container{width:min(100% - 28px,1180px)}
      .nav-actions .location-pill{display:none}
      .hero{padding:36px 0 34px}
      .hero-card{padding:28px 18px;border-radius:28px}
      .search-panel{grid-template-columns:1fr;border-radius:28px}
      .search-panel .btn{width:100%}
      .hero-metrics{grid-template-columns:1fr}
      .section-head{display:block}
      main section{padding:42px 0}
      .commission-title{font-size:28px}
      .cover-card{min-height:380px}
      .cover-art{width:170px;height:230px;right:18px}
      .news-row{grid-template-columns:auto 1fr}
      .news-row .arrow{display:none}
      .calendar-strip,.milestone{grid-template-columns:1fr}
      .mile{border-right:0;border-bottom:1px solid rgba(24,32,51,.08)}
      .mile:last-child{border-bottom:0}
      .form-row{grid-template-columns:1fr}
      .sticky-cta{border-radius:24px;align-items:stretch;flex-direction:column}
      .sticky-cta span{display:block;margin-left:0;margin-top:2px}
      .sticky-cta .btn{width:100%}
    }
    @media (max-width:520px){
      .brand-name{font-size:18px}
      .nav-wrap{height:68px}
      .hero-title{font-size:32px}
      .hero-desc{font-size:16px}
      .quick-tags{justify-content:flex-start}
      .data-badge{min-width:calc(50% - 6px)}
      .toc-item{grid-template-columns:auto 1fr}
      .toc-item .arrow{display:none}
      .join{padding:24px 18px;border-radius:28px}
      .footer-links{display:grid;grid-template-columns:1fr 1fr;width:100%}
      .footer-links a{text-align:center}
    }