/* roulang page: index */
:root{
      --bg:#17130f;
      --bg-soft:#221b15;
      --paper:#f3e8d3;
      --paper-2:#ead8b7;
      --text:#fff6e6;
      --muted:#c9b99b;
      --weak:#8f826e;
      --line:rgba(243,232,211,.18);
      --line-strong:rgba(243,232,211,.32);
      --brand:#c98943;
      --brand-2:#9f4b32;
      --green:#65724a;
      --blue:#536a78;
      --shadow:0 24px 80px rgba(0,0,0,.38);
      --shadow-soft:0 14px 38px rgba(0,0,0,.22);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 18% 0%, rgba(201,137,67,.22), transparent 32rem),
        radial-gradient(circle at 82% 18%, rgba(101,114,74,.22), transparent 30rem),
        linear-gradient(180deg,#15110e 0%,#1a1511 48%,#120f0c 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.11;
      z-index:-1;
      background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
      background-size:28px 28px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), rgba(0,0,0,.15));
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(201,137,67,.45);color:#fff}
    .site-container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .skip-link{
      position:absolute;left:16px;top:-80px;z-index:99;
      padding:10px 14px;border-radius:12px;background:var(--paper);color:#21170f;
      transition:.22s ease;
    }
    .skip-link:focus{top:14px;outline:3px solid rgba(201,137,67,.45)}
    .topbar{
      border-bottom:1px solid var(--line);
      background:rgba(23,19,15,.86);
      backdrop-filter:blur(18px);
      font-size:13px;
      color:var(--muted);
    }
    .topbar a{color:var(--paper);border-bottom:1px dashed rgba(243,232,211,.35)}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(23,19,15,.78);
      backdrop-filter:blur(20px);
      border-bottom:1px solid var(--line);
      box-shadow:0 10px 30px rgba(0,0,0,.18);
    }
    .brand-mark{
      display:inline-flex;align-items:center;gap:12px;font-weight:900;letter-spacing:.02em;
    }
    .brand-seal{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      color:#2a1709;font-weight:900;
      background:
        linear-gradient(135deg,#f2c678 0%,#c98943 45%,#8f3f2d 100%);
      box-shadow:inset 0 0 0 2px rgba(255,255,255,.18),0 12px 26px rgba(201,137,67,.2);
      border:1px solid rgba(255,246,230,.24);
    }
    .nav-link{
      position:relative;
      display:inline-flex;align-items:center;justify-content:center;
      padding:10px 15px;border-radius:999px;
      color:var(--muted);font-weight:700;font-size:15px;
      transition:color .2s ease, background .2s ease, transform .2s ease;
    }
    .nav-link:hover,.nav-link:focus{color:var(--text);background:rgba(243,232,211,.08);outline:none}
    .nav-link.active{color:#22160d;background:var(--paper)}
    .nav-cta,.btn-primary,.btn-secondary,.btn-ghost{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:46px;padding:12px 18px;border-radius:999px;
      font-weight:850;transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
      border:1px solid transparent;white-space:nowrap;
    }
    .nav-cta,.btn-primary{
      color:#251508;
      background:linear-gradient(135deg,#f1c879,#c98943 58%,#aa5532);
      box-shadow:0 14px 34px rgba(201,137,67,.23);
    }
    .btn-secondary{
      color:var(--paper);
      background:rgba(243,232,211,.08);
      border-color:var(--line-strong);
    }
    .btn-ghost{
      color:var(--muted);
      background:transparent;
      border-color:rgba(243,232,211,.14);
    }
    .nav-cta:hover,.btn-primary:hover,.btn-secondary:hover,.btn-ghost:hover{
      transform:translateY(-2px);
      box-shadow:0 18px 42px rgba(0,0,0,.26);
    }
    .btn-primary:focus,.btn-secondary:focus,.btn-ghost:focus,.nav-cta:focus,.menu-toggle:focus{
      outline:3px solid rgba(201,137,67,.42);outline-offset:3px;
    }
    .menu-toggle{
      width:46px;height:46px;border-radius:14px;border:1px solid var(--line);
      background:rgba(243,232,211,.08);display:none;place-items:center;
    }
    .menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
      display:block;width:20px;height:2px;border-radius:99px;background:var(--paper);content:"";transition:.2s ease;
    }
    .menu-toggle span::before{transform:translateY(-7px)}
    .menu-toggle span::after{transform:translateY(5px)}
    .mobile-open .menu-toggle span{background:transparent}
    .mobile-open .menu-toggle span::before{transform:rotate(45deg)}
    .mobile-open .menu-toggle span::after{transform:rotate(-45deg) translate(1px,-1px)}
    main{position:relative}
    .section{padding:86px 0}
    .section-tight{padding:58px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      color:#f4d9a8;background:rgba(201,137,67,.12);
      border:1px solid rgba(201,137,67,.28);
      font-size:13px;font-weight:850;letter-spacing:.08em;
    }
    .eyebrow::before{
      content:"";width:7px;height:7px;border-radius:99px;background:#f0b95e;
      box-shadow:0 0 0 5px rgba(240,185,94,.13);
    }
    .section-title{
      font-size:clamp(30px,4vw,48px);
      line-height:1.16;font-weight:950;letter-spacing:-.04em;margin:14px 0 16px;
    }
    .section-desc{
      max-width:760px;color:var(--muted);font-size:17px;line-height:1.9;
    }
    .card{
      background:linear-gradient(180deg,rgba(255,246,230,.1),rgba(255,246,230,.045));
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      transition:transform .22s ease,border-color .22s ease,background .22s ease,box-shadow .22s ease;
    }
    .card:hover{
      transform:translateY(-4px);
      border-color:rgba(201,137,67,.38);
      background:linear-gradient(180deg,rgba(255,246,230,.13),rgba(255,246,230,.055));
      box-shadow:0 22px 56px rgba(0,0,0,.28);
    }
    .badge{
      display:inline-flex;align-items:center;border-radius:999px;
      padding:5px 10px;border:1px solid rgba(243,232,211,.16);
      background:rgba(243,232,211,.07);color:var(--paper);
      font-size:12px;font-weight:800;
    }
    .hero-bento{
      padding:58px 0 24px;
    }
    .bento-grid{
      display:grid;
      grid-template-columns:minmax(0,1.55fr) minmax(280px,.8fr);
      grid-template-rows:auto auto;
      gap:18px;
      align-items:stretch;
    }
    .hero-main{
      grid-row:span 2;
      position:relative;overflow:hidden;
      min-height:560px;padding:44px;
      border-radius:34px;
      background:
        linear-gradient(135deg,rgba(24,18,13,.86),rgba(44,28,17,.78)),
        radial-gradient(circle at 80% 20%,rgba(201,137,67,.42),transparent 26rem);
      border:1px solid rgba(243,232,211,.2);
      box-shadow:var(--shadow);
    }
    .hero-main::after{
      content:"";
      position:absolute;inset:auto -14% -28% 22%;
      height:260px;border-radius:50%;
      background:radial-gradient(circle,rgba(201,137,67,.32),transparent 68%);
      filter:blur(6px);
    }
    .hero-title{
      position:relative;z-index:1;
      max-width:840px;
      font-size:clamp(38px,6vw,72px);
      line-height:1.05;font-weight:1000;letter-spacing:-.065em;
      margin:18px 0 22px;
    }
    .hero-copy{
      position:relative;z-index:1;
      max-width:760px;color:#dac8aa;font-size:18px;line-height:2;
    }
    .hero-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
    .hero-stats{
      position:relative;z-index:1;
      margin-top:34px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;
    }
    .stat-box{
      padding:18px;border-radius:20px;
      background:rgba(15,12,10,.56);
      border:1px solid rgba(243,232,211,.13);
    }
    .stat-value{font-size:30px;font-weight:1000;color:#f1c879;line-height:1}
    .stat-label{margin-top:8px;color:var(--muted);font-size:13px}
    .feature-mini{
      padding:26px;min-height:236px;position:relative;overflow:hidden;
      border-radius:30px;border:1px solid rgba(243,232,211,.18);
      background:linear-gradient(155deg,rgba(243,232,211,.11),rgba(243,232,211,.04));
    }
    .feature-mini.alt{
      background:linear-gradient(155deg,rgba(101,114,74,.35),rgba(243,232,211,.045));
    }
    .mini-icon{
      width:52px;height:52px;border-radius:18px;display:grid;place-items:center;
      background:rgba(243,232,211,.1);border:1px solid rgba(243,232,211,.17);
      font-size:23px;
    }
    .feature-mini h2{font-size:23px;font-weight:950;margin:18px 0 8px;letter-spacing:-.03em}
    .feature-mini p{color:var(--muted);font-size:15px;line-height:1.85}
    .cta-strip{
      margin-top:18px;padding:18px;border-radius:24px;
      background:linear-gradient(90deg,rgba(159,75,50,.62),rgba(201,137,67,.26),rgba(101,114,74,.38));
      border:1px solid rgba(243,232,211,.2);
      display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    }
    .rail{
      display:flex;gap:16px;overflow-x:auto;padding:8px 4px 18px;scroll-snap-type:x mandatory;
    }
    .rail::-webkit-scrollbar{height:8px}
    .rail::-webkit-scrollbar-thumb{background:rgba(243,232,211,.22);border-radius:99px}
    .poster-card{
      scroll-snap-align:start;
      flex:0 0 210px;height:284px;border-radius:24px;padding:16px;
      position:relative;overflow:hidden;border:1px solid rgba(243,232,211,.18);
      background:
        linear-gradient(180deg,rgba(0,0,0,.06),rgba(0,0,0,.72)),
        radial-gradient(circle at 50% 10%,rgba(201,137,67,.55),transparent 40%),
        linear-gradient(135deg,#3b2619,#17130f);
      display:flex;flex-direction:column;justify-content:flex-end;
      transition:transform .22s ease,border-color .22s ease;
    }
    .poster-card:nth-child(2n){background:linear-gradient(180deg,rgba(0,0,0,.04),rgba(0,0,0,.72)),radial-gradient(circle at 38% 14%,rgba(83,106,120,.55),transparent 42%),linear-gradient(135deg,#25313a,#17130f)}
    .poster-card:nth-child(3n){background:linear-gradient(180deg,rgba(0,0,0,.04),rgba(0,0,0,.72)),radial-gradient(circle at 64% 12%,rgba(101,114,74,.62),transparent 44%),linear-gradient(135deg,#26301e,#17130f)}
    .poster-card:hover{transform:translateY(-6px) rotate(-1deg);border-color:rgba(241,200,121,.55)}
    .poster-card h3{font-size:20px;font-weight:950;line-height:1.25}
    .poster-card p{font-size:13px;color:#d9c6a5;margin-top:8px;line-height:1.7}
    .poster-cta{
      opacity:0;transform:translateY(8px);
      margin-top:14px;font-weight:850;font-size:13px;color:#ffe0a4;
      transition:.2s ease;
    }
    .poster-card:hover .poster-cta{opacity:1;transform:translateY(0)}
    .news-list a{
      display:grid;grid-template-columns:96px 1fr auto;gap:16px;align-items:center;
      padding:18px;border-radius:18px;border:1px solid transparent;
      transition:.2s ease;
    }
    .news-list a:hover,.news-list a:focus{
      background:rgba(243,232,211,.07);border-color:var(--line);outline:none;
    }
    .date-pill{
      color:#22160d;background:var(--paper-2);border-radius:999px;
      padding:6px 10px;text-align:center;font-size:12px;font-weight:900;
    }
    .link-arrow{color:#f1c879;font-weight:900}
    .qa-grid{
      display:grid;grid-template-columns:1.05fr .95fr;gap:20px;align-items:start;
    }
    details{
      border:1px solid var(--line);border-radius:20px;
      background:rgba(243,232,211,.055);padding:0;overflow:hidden;
    }
    details+details{margin-top:12px}
    summary{
      list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:20px 22px;font-weight:950;cursor:pointer;
    }
    summary::-webkit-details-marker{display:none}
    summary::after{
      content:"＋";width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
      background:rgba(243,232,211,.09);color:#f1c879;flex:0 0 auto;
    }
    details[open] summary::after{content:"－"}
    details p{padding:0 22px 22px;margin:0;color:var(--muted);line-height:1.9}
    .article-layout{
      display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,.74fr);gap:20px;
    }
    .article-item{
      padding:20px 0;border-bottom:1px dashed rgba(243,232,211,.18);
    }
    .article-item:last-child{border-bottom:none}
    .article-item a{font-size:20px;font-weight:950;letter-spacing:-.02em;transition:.2s ease}
    .article-item a:hover{color:#f1c879}
    .article-item p{margin-top:8px;color:var(--muted)}
    .side-note{
      position:sticky;top:118px;
      padding:24px;border-radius:26px;background:rgba(243,232,211,.085);
      border:1px solid var(--line);
    }
    .safety-grid{
      display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;
    }
    .safety-card{padding:22px}
    .safety-card strong{display:block;font-size:18px;margin:12px 0 7px}
    .safety-card p{color:var(--muted);font-size:14px;line-height:1.8}
    .compare-wrap{
      overflow:hidden;border-radius:28px;border:1px solid var(--line);
      background:rgba(243,232,211,.055);
    }
    .compare-row{
      display:grid;grid-template-columns:1fr 1fr 1fr;
      border-bottom:1px solid var(--line);
    }
    .compare-row:last-child{border-bottom:none}
    .compare-cell{padding:18px 20px;border-right:1px solid var(--line)}
    .compare-cell:last-child{border-right:none}
    .compare-head{font-weight:950;color:#f1c879;background:rgba(201,137,67,.09)}
    .bubble-grid{
      display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:16px;
    }
    .bubble{
      padding:22px;border-radius:26px;background:rgba(243,232,211,.08);
      border:1px solid var(--line);position:relative;
    }
    .avatar{
      width:42px;height:42px;border-radius:50%;
      background:linear-gradient(135deg,#f1c879,#65724a);
      border:2px solid rgba(255,246,230,.3);
      display:grid;place-items:center;color:#22160d;font-weight:1000;
    }
    .bubble p{color:var(--muted);margin-top:12px}
    .app-panel{
      display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch;
      padding:28px;border-radius:34px;
      background:
        radial-gradient(circle at 80% 20%,rgba(201,137,67,.28),transparent 32rem),
        linear-gradient(135deg,rgba(243,232,211,.12),rgba(243,232,211,.055));
      border:1px solid rgba(243,232,211,.2);
      box-shadow:var(--shadow);
    }
    .form-card{
      padding:24px;border-radius:28px;background:rgba(12,10,8,.52);
      border:1px solid rgba(243,232,211,.15);
    }
    .form-field{margin-bottom:14px}
    .form-field label{display:block;margin-bottom:7px;color:var(--paper);font-weight:850;font-size:14px}
    .form-field input,.form-field textarea{
      width:100%;border:1px solid rgba(243,232,211,.18);
      background:rgba(243,232,211,.075);color:var(--text);
      border-radius:15px;padding:13px 14px;outline:none;
      transition:.2s ease;
    }
    .form-field input::placeholder,.form-field textarea::placeholder{color:rgba(201,185,155,.72)}
    .form-field input:focus,.form-field textarea:focus{
      border-color:rgba(201,137,67,.68);box-shadow:0 0 0 4px rgba(201,137,67,.12);
    }
    .form-hint{font-size:13px;color:var(--weak);margin-top:10px}
    .toast{
      display:none;margin-top:12px;padding:12px 14px;border-radius:14px;
      color:#f8e7c6;background:rgba(101,114,74,.26);border:1px solid rgba(101,114,74,.5);
    }
    .toast.show{display:block}
    .site-footer{
      padding:44px 0 28px;border-top:1px solid var(--line);
      background:rgba(12,10,8,.55);
    }
    .footer-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:26px;align-items:start;
    }
    .footer-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{
      padding:9px 12px;border-radius:999px;color:var(--muted);
      border:1px solid rgba(243,232,211,.12);transition:.2s ease;
    }
    .footer-links a:hover{color:var(--paper);background:rgba(243,232,211,.07)}
    .divider{height:1px;background:var(--line);margin:26px 0}
    @media (max-width:1024px){
      .bento-grid,.qa-grid,.article-layout,.app-panel{grid-template-columns:1fr}
      .hero-main{min-height:auto}
      .safety-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .bubble-grid{grid-template-columns:1fr 1fr}
      .side-note{position:relative;top:auto}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,var(--container))}
      .section{padding:64px 0}
      .desktop-nav{display:none}
      .menu-toggle{display:grid}
      .mobile-panel{
        display:none;position:absolute;left:14px;right:14px;top:calc(100% + 10px);
        padding:14px;border-radius:22px;background:rgba(28,22,17,.96);
        border:1px solid var(--line);box-shadow:var(--shadow);
      }
      .mobile-open .mobile-panel{display:block}
      .mobile-panel a{width:100%;justify-content:flex-start;margin:4px 0}
      .hero-bento{padding-top:34px}
      .hero-main{padding:28px;border-radius:28px}
      .hero-stats{grid-template-columns:1fr}
      .cta-strip{align-items:flex-start}
      .news-list a{grid-template-columns:1fr;gap:9px}
      .compare-row{grid-template-columns:1fr}
      .compare-cell{border-right:none;border-bottom:1px solid var(--line)}
      .compare-cell:last-child{border-bottom:none}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .topbar .site-container{flex-direction:column;align-items:flex-start;gap:6px}
      .brand-seal{width:38px;height:38px;border-radius:13px}
      .brand-mark span:last-child{font-size:16px}
      .hero-title{font-size:38px}
      .hero-copy{font-size:16px}
      .hero-actions .btn-primary,.hero-actions .btn-secondary,.hero-actions .btn-ghost{width:100%}
      .poster-card{flex-basis:184px;height:260px}
      .safety-grid,.bubble-grid{grid-template-columns:1fr}
      .app-panel{padding:18px;border-radius:26px}
    }