/* roulang page: index */
:root{
      --bg: #f7f3ed;
      --bg-2: #f1ebe1;
      --panel: rgba(255,255,255,.76);
      --panel-solid: #ffffff;
      --text: #171310;
      --muted: #6f655c;
      --line: rgba(56, 45, 38, .10);
      --line-strong: rgba(56, 45, 38, .16);
      --accent: #9f6f2f;
      --accent-2: #c48a44;
      --accent-3: #d8b47a;
      --good: #3f6f53;
      --shadow: 0 20px 60px rgba(23,19,16,.08);
      --shadow-hover: 0 26px 70px rgba(23,19,16,.14);
      --radius: 22px;
      --radius-lg: 28px;
      --container: 1220px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(214,178,126,.28), transparent 28%),
        radial-gradient(circle at 80% 10%, rgba(159,111,47,.12), transparent 30%),
        linear-gradient(180deg, #fbf8f3 0%, #f3ede4 38%, #efe8de 100%);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
      line-height:1.75;
      letter-spacing:.01em;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    ::selection{background:rgba(159,111,47,.18)}
    .container{
      width:min(var(--container), calc(100% - 32px));
      margin:0 auto;
    }
    .glass{
      background:var(--panel);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border:1px solid var(--line);
      box-shadow: var(--shadow);
    }
    .hairline{border:1px solid var(--line)}
    .heading-strong{
      letter-spacing:-.03em;
      line-height:1.1;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .8rem;
      border-radius:999px;
      background:rgba(159,111,47,.10);
      color:#6c4a1c;
      border:1px solid rgba(159,111,47,.14);
      font-size:.85rem;
      font-weight:600;
      white-space:nowrap;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:.58rem .95rem;
      border-radius:999px;
      border:1px solid rgba(56,45,38,.10);
      background:rgba(255,255,255,.72);
      color:#4f463f;
      font-size:.94rem;
      transition:all .24s ease;
      white-space:nowrap;
    }
    .chip:hover,.chip:focus-visible{
      transform:translateY(-1px);
      border-color:rgba(159,111,47,.28);
      box-shadow:0 10px 28px rgba(23,19,16,.08);
      outline:none;
    }
    .chip.active{
      background:#171310;
      color:#fff;
      border-color:#171310;
    }
    .btn-primary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      padding:.9rem 1.15rem;
      border-radius:999px;
      background:linear-gradient(135deg, #171310 0%, #2d251f 100%);
      color:#fff;
      border:1px solid rgba(23,19,16,.28);
      box-shadow:0 12px 28px rgba(23,19,16,.16);
      transition:all .24s ease;
      font-weight:600;
    }
    .btn-primary:hover,.btn-primary:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 18px 38px rgba(23,19,16,.20);
      outline:none;
    }
    .btn-secondary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      padding:.9rem 1.15rem;
      border-radius:999px;
      background:rgba(255,255,255,.72);
      color:#2d251f;
      border:1px solid rgba(56,45,38,.12);
      transition:all .24s ease;
      font-weight:600;
    }
    .btn-secondary:hover,.btn-secondary:focus-visible{
      transform:translateY(-1px);
      border-color:rgba(159,111,47,.26);
      box-shadow:0 14px 28px rgba(23,19,16,.08);
      outline:none;
    }
    .section{
      padding:clamp(3.2rem, 5vw, 6rem) 0;
    }
    .section-tight{
      padding:clamp(2rem, 3.5vw, 3.6rem) 0;
    }
    .section-title{
      font-size:clamp(1.5rem, 2.2vw, 2.25rem);
      line-height:1.15;
      letter-spacing:-.03em;
      font-weight:800;
      color:#161210;
    }
    .section-subtitle{
      color:var(--muted);
      font-size:1rem;
    }
    .card{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(56,45,38,.10);
      border-radius:var(--radius);
      box-shadow:0 10px 30px rgba(23,19,16,.05);
      transition:all .25s ease;
    }
    .card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(159,111,47,.20);
    }
    .metric-number{
      font-size:clamp(1.6rem, 2.4vw, 2.6rem);
      line-height:1;
      font-weight:800;
      letter-spacing:-.04em;
    }
    .metric-label{
      color:#5f564d;
      font-size:.92rem;
    }
    .muted{color:var(--muted)}
    .tiny{font-size:.88rem}
    .nav-wrap{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(247,243,237,.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom:1px solid rgba(56,45,38,.08);
    }
    .nav-inner{
      display:grid;
      grid-template-columns:auto 1fr auto;
      align-items:center;
      gap:1rem;
      min-height:76px;
    }
    .logo-mark{
      display:inline-flex;
      align-items:center;
      gap:.75rem;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .logo-badge{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, #171310 0%, #3a3028 100%);
      color:#fff;
      box-shadow:0 12px 24px rgba(23,19,16,.16);
      flex:0 0 auto;
    }
    .nav-chips{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:.6rem;
      overflow-x:auto;
      scrollbar-width:none;
      padding:.4rem 0;
    }
    .nav-chips::-webkit-scrollbar{display:none}
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:
        radial-gradient(circle at top right, rgba(216,180,122,.20), transparent 24%),
        linear-gradient(180deg, rgba(255,255,255,.84), rgba(255,255,255,.72));
      border:1px solid rgba(56,45,38,.10);
      box-shadow:var(--shadow);
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        linear-gradient(120deg, transparent 0%, rgba(255,255,255,.28) 18%, transparent 38%),
        radial-gradient(circle at 20% 80%, rgba(159,111,47,.12), transparent 26%);
      pointer-events:none;
    }
    .hero-badge{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.48rem .85rem;
      border-radius:999px;
      background:rgba(23,19,16,.06);
      border:1px solid rgba(23,19,16,.08);
      color:#3f372f;
      font-weight:600;
      font-size:.88rem;
    }
    .stat-pill{
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(56,45,38,.10);
      padding:1rem;
      box-shadow:0 12px 24px rgba(23,19,16,.05);
    }
    .list-dot{
      width:.55rem;height:.55rem;border-radius:999px;background:var(--accent);flex:0 0 auto;margin-top:.55rem;
      box-shadow:0 0 0 5px rgba(159,111,47,.10);
    }
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(12, minmax(0, 1fr));
      gap:1rem;
    }
    .span-7{grid-column:span 7 / span 7}
    .span-5{grid-column:span 5 / span 5}
    .span-8{grid-column:span 8 / span 8}
    .span-4{grid-column:span 4 / span 4}
    .span-6{grid-column:span 6 / span 6}
    .span-3{grid-column:span 3 / span 3}
    .span-9{grid-column:span 9 / span 9}
    .soft-line{border-top:1px solid rgba(56,45,38,.10)}
    .faq details{
      border:1px solid rgba(56,45,38,.10);
      border-radius:18px;
      background:rgba(255,255,255,.74);
      box-shadow:0 10px 22px rgba(23,19,16,.04);
      overflow:hidden;
    }
    .faq summary{
      list-style:none;
      cursor:pointer;
      padding:1rem 1.1rem;
      font-weight:700;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq details[open] summary{
      border-bottom:1px solid rgba(56,45,38,.08);
    }
    .faq .answer{
      padding:0 1.1rem 1.05rem 1.1rem;
      color:var(--muted);
    }
    .form-field{
      width:100%;
      border:1px solid rgba(56,45,38,.12);
      background:rgba(255,255,255,.82);
      border-radius:16px;
      padding:.95rem 1rem;
      outline:none;
      transition:all .22s ease;
      color:#1d1713;
      box-shadow: inset 0 1px 0 rgba(255,255,255,.45);
    }
    .form-field::placeholder{color:#a39485}
    .form-field:focus{
      border-color:rgba(159,111,47,.35);
      box-shadow:0 0 0 4px rgba(159,111,47,.10);
      background:#fff;
    }
    .footer{
      background:#171310;
      color:#d8d0c6;
    }
    .footer a{color:#f2e9dc}
    .footer a:hover{color:#fff}
    .foot-line{border-top:1px solid rgba(255,255,255,.10)}
    .fade-up{
      animation:fadeUp .75s ease both;
    }
    .delay-1{animation-delay:.06s}
    .delay-2{animation-delay:.12s}
    .delay-3{animation-delay:.18s}
    @keyframes fadeUp{
      from{opacity:0;transform:translateY(14px)}
      to{opacity:1;transform:translateY(0)}
    }
    @media (max-width: 1024px){
      .nav-inner{grid-template-columns:1fr; padding:.9rem 0}
      .nav-chips{justify-content:flex-start}
      .mini-grid,.span-7,.span-5,.span-8,.span-4,.span-6,.span-3,.span-9{grid-column:span 12 / span 12}
    }
    @media (max-width: 768px){
      .section{padding:3rem 0}
      .section-tight{padding:1.8rem 0}
      .hero-stack{display:grid; gap:1rem}
      .btn-primary,.btn-secondary{width:100%}
    }

/* roulang page: category1 */
:root{
      --bg: #f6f1ea;
      --bg-soft: #fbf8f3;
      --panel: #fffaf4;
      --panel-deep: #191510;
      --ink: #1d1813;
      --muted: #7b6c5d;
      --line: #e7dccf;
      --line-strong: #d8c7b3;
      --accent: #a5764b;
      --accent-2: #c08963;
      --accent-soft: rgba(165, 118, 75, .12);
      --shadow: 0 20px 50px rgba(32, 24, 16, .08);
      --shadow-strong: 0 25px 60px rgba(32, 24, 16, .13);
      --radius: 22px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 10%, rgba(165,118,75,.10), transparent 26%),
        radial-gradient(circle at 85% 14%, rgba(192,137,99,.12), transparent 22%),
        linear-gradient(180deg, #f8f4ee 0%, #f4eee6 100%);
      line-height:1.7;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(165,118,75,.22);color:#241b14}
    .container{width:min(1200px, calc(100% - 1.6rem)); margin-inline:auto}
    .nav-inner{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      background: rgba(246, 241, 234, .82);
      border-bottom: 1px solid rgba(231, 220, 207, .9);
      box-shadow: 0 1px 0 rgba(255,255,255,.45) inset;
    }
    .logo-mark{
      display:flex;
      align-items:center;
      gap:.85rem;
      min-width:max-content;
    }
    .logo-badge{
      width:2.55rem;
      height:2.55rem;
      border-radius: 999px;
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      letter-spacing:.04em;
      background:
        linear-gradient(145deg, #2a221b, #18130f);
      box-shadow: 0 8px 20px rgba(24,19,15,.18);
      flex:none;
    }
    .nav-chips{
      display:flex;
      align-items:center;
      gap:.55rem;
      overflow-x:auto;
      scrollbar-width:none;
      -webkit-overflow-scrolling: touch;
      padding:.25rem .1rem;
    }
    .nav-chips::-webkit-scrollbar{display:none}
    .chip{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.35rem;
      min-height:2.45rem;
      padding:.58rem 1rem;
      border:1px solid transparent;
      border-radius:999px;
      background:rgba(255,255,255,.42);
      color:#3b2f27;
      font-weight:600;
      font-size:.92rem;
      letter-spacing:.01em;
      transition: all .22s ease;
      white-space:nowrap;
    }
    .chip:hover{
      transform: translateY(-1px);
      border-color: rgba(165,118,75,.24);
      background: rgba(255,255,255,.75);
      box-shadow: 0 10px 24px rgba(24,19,15,.06);
    }
    .chip.active{
      background: linear-gradient(145deg, #241c16, #18130f);
      color:#fff;
      box-shadow: 0 14px 28px rgba(24,19,15,.16);
    }
    .btn-primary,.btn-secondary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.45rem;
      min-height:2.95rem;
      padding:.78rem 1.15rem;
      border-radius:999px;
      font-weight:700;
      transition: all .22s ease;
      white-space:nowrap;
      border:1px solid transparent;
      outline:none;
      cursor:pointer;
    }
    .btn-primary{
      color:#fff;
      background: linear-gradient(145deg, #a8794e, #8c6240);
      box-shadow: 0 16px 30px rgba(140,98,64,.22);
    }
    .btn-primary:hover{
      transform: translateY(-1px);
      box-shadow: 0 18px 34px rgba(140,98,64,.28);
      filter:saturate(1.03);
    }
    .btn-secondary{
      color:#2e251f;
      background: rgba(255,255,255,.6);
      border-color: rgba(215,198,179,.9);
    }
    .btn-secondary:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.88);
      border-color: rgba(165,118,75,.32);
      box-shadow: 0 12px 25px rgba(24,19,15,.06);
    }
    .btn-primary:focus-visible,.btn-secondary:focus-visible,.chip:focus-visible,.logo-mark:focus-visible,
    input:focus-visible,textarea:focus-visible{
      outline:none;
      box-shadow: 0 0 0 4px rgba(165,118,75,.18);
    }
    .surface{
      background: rgba(255, 250, 244, .88);
      border: 1px solid rgba(231, 220, 207, .95);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .surface-dark{
      background: linear-gradient(145deg, #1e1914, #14110e);
      color:#fff;
      border:1px solid rgba(255,255,255,.06);
      box-shadow: 0 24px 60px rgba(24,19,15,.22);
      border-radius: calc(var(--radius) + 2px);
    }
    .kicker{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.42rem .8rem;
      border-radius:999px;
      background: rgba(165,118,75,.10);
      color:#8b5f38;
      font-size:.82rem;
      font-weight:700;
      letter-spacing:.04em;
    }
    .section-title{
      font-size: clamp(1.45rem, 1.1rem + 1vw, 2.15rem);
      line-height:1.22;
      letter-spacing:-.02em;
      color:#1b1612;
      font-weight:800;
    }
    .section-desc{
      color:var(--muted);
      font-size: .98rem;
    }
    .metric-number{
      font-size: clamp(1.8rem, 1.2rem + 2vw, 3rem);
      line-height:1;
      letter-spacing:-.04em;
      font-weight:800;
      color:#1e1712;
    }
    .metric-label{
      color:#7a6b5d;
      font-size:.85rem;
      font-weight:700;
      letter-spacing:.02em;
    }
    .metric-note{
      color:var(--muted);
      font-size:.88rem;
    }
    .card-soft{
      background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,250,244,.88));
      border:1px solid rgba(231,220,207,.95);
      border-radius: 20px;
      box-shadow: var(--shadow);
      transition: all .24s ease;
    }
    .card-soft:hover{
      transform: translateY(-2px);
      box-shadow: var(--shadow-strong);
      border-color: rgba(165,118,75,.24);
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.36rem .72rem;
      border-radius:999px;
      background:#f4ebe0;
      color:#6e5848;
      font-size:.79rem;
      font-weight:700;
    }
    .pill-dark{
      background: rgba(255,255,255,.08);
      color:#fff;
    }
    .stat-bar{
      height:9px;
      border-radius:999px;
      background:#f0e5d8;
      overflow:hidden;
    }
    .stat-bar > span{
      display:block;
      height:100%;
      border-radius:inherit;
      background: linear-gradient(90deg, #b27a4a, #d39b72);
    }
    .compare-line{
      position:relative;
      padding-left:1.2rem;
    }
    .compare-line::before{
      content:'';
      position:absolute;
      left:0;
      top:.65rem;
      width:.55rem;
      height:.55rem;
      border-radius:999px;
      background: #a7764b;
      box-shadow: 0 0 0 5px rgba(165,118,75,.12);
    }
    .faq-item{
      border:1px solid rgba(231,220,207,.98);
      border-radius: 18px;
      background: rgba(255,255,255,.72);
      overflow:hidden;
      transition: all .22s ease;
    }
    .faq-item:hover{border-color: rgba(165,118,75,.24); box-shadow: 0 12px 30px rgba(24,19,15,.06);}
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:1rem 1.1rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      font-weight:700;
      color:#241d17;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .faq-content{
      padding:0 1.1rem 1rem 1.1rem;
      color:var(--muted);
      font-size:.95rem;
    }
    .faq-item .toggle{
      flex:none;
      width:1.85rem;
      height:1.85rem;
      border-radius:999px;
      display:grid;
      place-items:center;
      background:#f2e7da;
      color:#8a6240;
      font-size:1rem;
      transition: transform .22s ease;
    }
    .faq-item[open] .toggle{transform: rotate(45deg); background:#ead8c7}
    .field{
      width:100%;
      min-height:3.2rem;
      padding:.78rem 1rem;
      border-radius:16px;
      border:1px solid rgba(214,199,182,.95);
      background: rgba(255,255,255,.84);
      color:#251d16;
      transition: all .2s ease;
      outline:none;
    }
    .field::placeholder{color:#9f9080}
    .field:focus{
      border-color: rgba(165,118,75,.45);
      box-shadow: 0 0 0 4px rgba(165,118,75,.12);
      background:#fff;
    }
    .footer{
      background: linear-gradient(180deg, #17130f, #120f0c);
      color:#fff;
      margin-top: 4rem;
      border-top:1px solid rgba(255,255,255,.05);
    }
    .footer a{
      color: rgba(255,255,255,.75);
      transition: color .2s ease, transform .2s ease;
    }
    .footer a:hover{color:#fff}
    .foot-line{
      border-top:1px solid rgba(255,255,255,.08);
    }
    .text-ink-500{color: var(--muted)}
    .text-ink-600{color:#66584a}
    .hero-panel{
      position:relative;
      overflow:hidden;
    }
    .hero-panel::before{
      content:'';
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(circle at 25% 15%, rgba(255,255,255,.15), transparent 26%),
        radial-gradient(circle at 82% 18%, rgba(211,155,114,.16), transparent 18%),
        radial-gradient(circle at 75% 75%, rgba(255,255,255,.06), transparent 22%);
      pointer-events:none;
    }
    .grid-frame{
      background:
        linear-gradient(rgba(255,255,255,.0), rgba(255,255,255,.0)),
        linear-gradient(90deg, rgba(183,155,125,.1) 1px, transparent 1px),
        linear-gradient(rgba(183,155,125,.1) 1px, transparent 1px);
      background-size: auto, 24px 24px, 24px 24px;
      background-position: center;
    }
    @media (max-width: 1024px){
      .nav-inner .container{padding-top:.85rem;padding-bottom:.85rem}
    }
    @media (max-width: 768px){
      .nav-inner .container{gap:.9rem}
      .logo-mark .text-lg{font-size:1rem}
      .surface,.surface-dark,.card-soft{border-radius:18px}
    }
    @media (max-width: 520px){
      .container{width:min(100% - 1rem, 1200px)}
      .btn-primary,.btn-secondary,.chip{width:auto}
      .metric-number{font-size:1.65rem}
      .faq-item summary{padding:.9rem 1rem}
    }