/* roulang page: index */
:root{
      --bg:#F7F2EA;
      --paper:#FFFDF8;
      --ink:#171413;
      --muted:#6F625C;
      --wine:#6E2438;
      --wine-deep:#4D1828;
      --copper:#B9825B;
      --cocoa:#241A18;
      --line:#E4D8CC;
      --clay:#EFE3D7;
      --shadow:0 18px 60px rgba(54,35,25,.08);
      --shadow-lg:0 26px 80px rgba(54,35,25,.14);
      --radius:28px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:
        radial-gradient(circle at 85% 8%, rgba(185,130,91,.18), transparent 34%),
        radial-gradient(circle at 8% 46%, rgba(110,36,56,.08), transparent 30%),
        var(--bg);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      line-height:1.8;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }

    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.24;
      background-image:
        linear-gradient(rgba(23,20,19,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23,20,19,.03) 1px, transparent 1px);
      background-size:34px 34px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.7), transparent 76%);
      z-index:-1;
    }

    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(110,36,56,.18);color:var(--ink)}
    ::-webkit-scrollbar{width:10px;height:10px}
    ::-webkit-scrollbar-track{background:#efe6dc}
    ::-webkit-scrollbar-thumb{background:#cbb8a9;border-radius:999px;border:2px solid #efe6dc}
    ::-webkit-scrollbar-thumb:hover{background:#b9825b}

    .skip-link{
      position:absolute;
      left:16px;
      top:-48px;
      z-index:100;
      padding:10px 14px;
      border-radius:999px;
      background:var(--wine);
      color:#fffdf8;
      transition:.2s ease;
    }
    .skip-link:focus{top:16px;outline:3px solid rgba(185,130,91,.45)}

    .app-shell{min-height:100vh}
    .side-nav{
      position:fixed;
      inset:0 auto 0 0;
      width:264px;
      padding:24px 18px;
      background:
        linear-gradient(180deg, rgba(255,253,248,.055), transparent 32%),
        var(--cocoa);
      color:#F7F2EA;
      z-index:50;
      border-right:1px solid rgba(255,253,248,.12);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      box-shadow:18px 0 80px rgba(36,26,24,.16);
    }

    .brand-mark{
      width:44px;height:44px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--wine),var(--copper));
      color:#fffdf8;
      box-shadow:0 14px 36px rgba(110,36,56,.28);
      flex:none;
      font-weight:800;
      letter-spacing:.04em;
    }

    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
      gap:12px;
      min-height:48px;
      padding:12px 14px;
      border-radius:16px;
      color:rgba(247,242,234,.74);
      transition:background .2s ease,color .2s ease,transform .2s ease;
      outline:none;
    }
    .nav-item:hover{
      color:#FFFDF8;
      background:rgba(255,253,248,.08);
      transform:translateX(2px);
    }
    .nav-item:focus-visible{
      outline:3px solid rgba(185,130,91,.35);
      outline-offset:2px;
    }
    .nav-item.active{
      color:#FFFDF8;
      background:rgba(255,253,248,.12);
    }
    .nav-item.active::before{
      content:"";
      position:absolute;
      left:0;
      top:14px;
      bottom:14px;
      width:3px;
      border-radius:999px;
      background:var(--copper);
    }
    .nav-dot{
      width:10px;height:10px;border-radius:999px;
      border:1px solid rgba(255,253,248,.42);
      background:transparent;
      flex:none;
    }
    .nav-item.active .nav-dot{background:var(--copper);border-color:var(--copper)}

    .main-wrap{
      margin-left:264px;
      min-height:100vh;
    }
    .content-container{
      width:min(100%,1440px);
      margin:0 auto;
      padding:44px clamp(24px,4vw,64px) 0;
    }

    .mobile-bar{
      display:none;
      position:sticky;
      top:0;
      z-index:60;
      height:66px;
      padding:0 18px;
      background:rgba(255,253,248,.88);
      backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);
    }
    .hamburger{
      width:44px;height:44px;border-radius:14px;
      display:grid;place-items:center;
      background:var(--paper);
      border:1px solid var(--line);
      transition:.2s ease;
    }
    .hamburger:hover{border-color:var(--copper);transform:translateY(-1px)}
    .drawer-mask{
      display:none;
      position:fixed;
      inset:0;
      background:rgba(23,20,19,.48);
      z-index:80;
      opacity:0;
      transition:opacity .24s ease;
    }
    .drawer{
      position:fixed;
      top:0;left:0;bottom:0;
      width:min(86vw,330px);
      background:var(--cocoa);
      color:#F7F2EA;
      z-index:90;
      transform:translateX(-105%);
      transition:transform .28s ease;
      padding:22px 18px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      box-shadow:24px 0 80px rgba(0,0,0,.24);
    }
    body.drawer-open .drawer-mask{display:block;opacity:1}
    body.drawer-open .drawer{transform:translateX(0)}

    .section{padding:96px 0}
    .section-tight{padding:72px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      border:1px solid rgba(185,130,91,.38);
      background:rgba(255,253,248,.68);
      color:var(--wine);
      font-size:13px;
      font-weight:700;
      letter-spacing:.04em;
    }
    .eyebrow.dark{
      background:rgba(255,253,248,.08);
      border-color:rgba(255,253,248,.18);
      color:#F7F2EA;
    }
    .section-title{
      font-size:clamp(30px,4vw,48px);
      line-height:1.16;
      letter-spacing:-.04em;
      font-weight:800;
      color:var(--ink);
    }
    .section-lead{
      color:var(--muted);
      font-size:16px;
      line-height:1.9;
      max-width:740px;
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:12px 22px;
      border-radius:999px;
      font-weight:750;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
      outline:none;
      white-space:nowrap;
    }
    .btn:focus-visible{outline:3px solid rgba(185,130,91,.42);outline-offset:3px}
    .btn-primary{
      background:var(--wine);
      color:#FFFDF8;
      box-shadow:0 14px 34px rgba(110,36,56,.22);
    }
    .btn-primary:hover{
      background:var(--wine-deep);
      transform:translateY(-2px);
      box-shadow:0 18px 46px rgba(110,36,56,.30);
    }
    .btn-secondary{
      background:rgba(255,253,248,.72);
      color:var(--ink);
      border:1px solid var(--line);
    }
    .btn-secondary:hover{
      border-color:var(--copper);
      color:var(--wine);
      background:#FFF7EE;
      transform:translateY(-2px);
    }
    .text-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--wine);
      font-weight:750;
      transition:gap .2s ease,color .2s ease;
    }
    .text-link:hover{gap:12px;color:var(--wine-deep);text-decoration:underline;text-underline-offset:4px}

    .card{
      border:1px solid var(--line);
      background:rgba(255,253,248,.84);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease,background .24s ease;
    }
    .card:hover{
      transform:translateY(-4px);
      border-color:rgba(185,130,91,.62);
      box-shadow:var(--shadow-lg);
      background:#FFFDF8;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      background:#F1E7DD;
      color:var(--wine);
      font-size:12px;
      font-weight:750;
      letter-spacing:.03em;
      border:1px solid rgba(228,216,204,.75);
    }
    .tag.dark{
      background:rgba(255,253,248,.1);
      color:#FFFDF8;
      border-color:rgba(255,253,248,.18);
    }

    .hero{
      min-height:calc(100vh - 88px);
      display:grid;
      align-items:center;
      padding:44px 0 80px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.18fr) minmax(360px,.82fr);
      gap:34px;
      align-items:stretch;
    }
    .hero-title{
      font-size:clamp(40px,6vw,76px);
      line-height:1.04;
      letter-spacing:-.065em;
      font-weight:850;
      color:var(--ink);
    }
    .hero-title span{
      color:var(--wine);
      position:relative;
    }
    .hero-title span::after{
      content:"";
      position:absolute;
      left:.06em;right:.06em;bottom:.06em;
      height:.18em;
      background:rgba(185,130,91,.28);
      z-index:-1;
      border-radius:999px;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      min-height:620px;
      border-radius:32px;
      background:
        radial-gradient(circle at 70% 18%, rgba(185,130,91,.32), transparent 32%),
        linear-gradient(150deg,#2A1D1B 0%,#241A18 48%,#4D1828 100%);
      color:#FFFDF8;
      border:1px solid rgba(255,253,248,.14);
      box-shadow:var(--shadow-lg);
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:22px;
      border:1px solid rgba(255,253,248,.1);
      border-radius:26px;
      pointer-events:none;
    }
    .abstract-cover{
      position:relative;
      overflow:hidden;
      border-radius:24px;
      min-height:190px;
      background:
        radial-gradient(circle at 18% 18%, rgba(255,253,248,.32), transparent 20%),
        radial-gradient(circle at 82% 42%, rgba(185,130,91,.48), transparent 24%),
        linear-gradient(135deg, rgba(110,36,56,.96), rgba(36,26,24,.96));
    }
    .abstract-cover::after{
      content:"";
      position:absolute;
      inset:22px;
      border-radius:20px;
      border:1px solid rgba(255,253,248,.16);
      background:
        linear-gradient(120deg, transparent 0 35%, rgba(255,253,248,.09) 36% 42%, transparent 43%),
        repeating-linear-gradient(90deg, rgba(255,253,248,.04) 0 1px, transparent 1px 18px);
      transform:rotate(-2deg) scale(1.05);
    }
    .metric-card{
      border:1px solid rgba(255,253,248,.14);
      background:rgba(255,253,248,.075);
      border-radius:22px;
      padding:20px;
      transition:.2s ease;
    }
    .metric-card:hover{background:rgba(255,253,248,.11);transform:translateY(-2px)}
    .metric-num{
      font-size:34px;
      font-weight:850;
      letter-spacing:-.04em;
      color:#F3D5BE;
    }

    .feature-grid{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:22px;
    }
    .feature-stack{display:grid;gap:22px}
    .feature-wide{
      min-height:290px;
      padding:34px;
    }
    .feature-emphasis{
      background:linear-gradient(145deg,var(--wine),#3A141F);
      color:#FFFDF8;
      border-color:rgba(255,253,248,.14);
    }
    .feature-emphasis .section-lead,.feature-emphasis p{color:rgba(255,253,248,.78)}

    .masonry{
      columns:3 280px;
      column-gap:22px;
    }
    .masonry-card{
      break-inside:avoid;
      margin:0 0 22px;
      padding:18px;
    }
    .cover-small{
      height:150px;
      border-radius:22px;
      overflow:hidden;
      background:
        radial-gradient(circle at 72% 24%, rgba(185,130,91,.50), transparent 26%),
        linear-gradient(135deg,#EFE3D7,#FFFDF8 42%,#D8BBA4);
      border:1px solid rgba(228,216,204,.82);
      transition:transform .24s ease;
    }
    .masonry-card:hover .cover-small{transform:scale(1.025)}
    .cover-small.alt{
      background:
        linear-gradient(110deg,rgba(36,26,24,.92),rgba(110,36,56,.88)),
        repeating-linear-gradient(45deg,rgba(255,253,248,.06) 0 2px,transparent 2px 14px);
    }
    .cover-small.soft{
      background:
        radial-gradient(circle at 26% 30%, rgba(110,36,56,.18), transparent 25%),
        radial-gradient(circle at 76% 70%, rgba(185,130,91,.34), transparent 28%),
        #F1E7DD;
    }

    .compare-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:30px;
      align-items:start;
    }
    .compare-row{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
      padding:14px;
      border-radius:22px;
      border:1px solid var(--line);
      background:rgba(255,253,248,.72);
      margin-bottom:14px;
    }
    .compare-cell{
      padding:16px;
      border-radius:18px;
      background:#F8F1E9;
      min-height:112px;
    }
    .compare-cell.good{
      background:#FFFDF8;
      border:1px solid rgba(185,130,91,.38);
    }

    details.faq-item{
      border:1px solid var(--line);
      background:rgba(255,253,248,.82);
      border-radius:24px;
      padding:0;
      overflow:hidden;
      box-shadow:0 12px 36px rgba(54,35,25,.045);
      transition:.2s ease;
    }
    details.faq-item:hover{border-color:rgba(185,130,91,.58)}
    details.faq-item[open]{background:#FFFDF8;border-color:rgba(110,36,56,.32)}
    details.faq-item summary{
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:22px 24px;
      cursor:pointer;
      font-weight:800;
      color:var(--ink);
      outline:none;
    }
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item summary:focus-visible{outline:3px solid rgba(185,130,91,.35);outline-offset:-3px}
    .faq-icon{
      width:28px;height:28px;border-radius:999px;
      display:grid;place-items:center;
      background:#F1E7DD;
      color:var(--wine);
      flex:none;
      transition:transform .2s ease,background .2s ease;
    }
    details[open] .faq-icon{transform:rotate(45deg);background:var(--wine);color:#fff}
    .faq-content{
      padding:0 24px 24px;
      color:var(--muted);
    }
    .faq-content p{
      margin:0;
      padding-left:16px;
      border-left:3px solid var(--wine);
    }

    .cta-card{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      background:
        radial-gradient(circle at 84% 18%, rgba(185,130,91,.28), transparent 30%),
        linear-gradient(145deg,#241A18,#2D1C1B 50%,#4D1828);
      color:#FFFDF8;
      padding:clamp(28px,5vw,56px);
      box-shadow:var(--shadow-lg);
      border:1px solid rgba(255,253,248,.12);
    }
    .cta-card::after{
      content:"";
      position:absolute;
      right:-80px;
      bottom:-100px;
      width:280px;
      height:280px;
      border-radius:50%;
      border:1px solid rgba(255,253,248,.12);
      box-shadow:inset 0 0 0 34px rgba(255,253,248,.035);
    }
    .form-field label{
      display:block;
      margin-bottom:8px;
      color:rgba(255,253,248,.82);
      font-size:14px;
      font-weight:700;
    }
    .form-field input,.form-field textarea{
      width:100%;
      min-height:50px;
      border-radius:16px;
      border:1px solid rgba(255,253,248,.16);
      background:rgba(255,253,248,.08);
      color:#FFFDF8;
      padding:12px 14px;
      outline:none;
      transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .form-field textarea{min-height:126px;resize:vertical}
    .form-field input::placeholder,.form-field textarea::placeholder{color:rgba(255,253,248,.46)}
    .form-field input:focus,.form-field textarea:focus{
      border-color:rgba(185,130,91,.82);
      box-shadow:0 0 0 4px rgba(185,130,91,.18);
      background:rgba(255,253,248,.12);
    }

    .footer{
      margin-top:96px;
      background:var(--cocoa);
      color:#F7F2EA;
      border-top:1px solid rgba(255,253,248,.12);
    }
    .footer a{
      color:rgba(247,242,234,.72);
      transition:.2s ease;
    }
    .footer a:hover{color:#FFFDF8;text-decoration:underline;text-underline-offset:4px}
    .footer-note{color:rgba(247,242,234,.62)}

    @media (max-width: 1180px){
      .side-nav{width:104px;padding:22px 14px}
      .side-nav .brand-copy,.side-nav .nav-text,.side-nav .side-note{display:none}
      .side-nav .brand-block{justify-content:center}
      .nav-item{justify-content:center;padding:13px}
      .nav-item.active::before{top:12px;bottom:12px}
      .main-wrap{margin-left:104px}
      .hero-grid{grid-template-columns:1fr}
      .hero-panel{min-height:auto}
      .compare-grid{grid-template-columns:1fr}
    }

    @media (max-width: 767px){
      .side-nav{display:none}
      .mobile-bar{display:flex;align-items:center;justify-content:space-between}
      .main-wrap{margin-left:0}
      .content-container{padding:24px 18px 0}
      .hero{min-height:auto;padding:34px 0 56px}
      .hero-title{font-size:clamp(38px,11vw,52px)}
      .hero-panel{border-radius:28px}
      .section{padding:66px 0}
      .section-tight{padding:54px 0}
      .feature-grid{grid-template-columns:1fr}
      .compare-row{grid-template-columns:1fr}
      .masonry{columns:1}
      .btn{width:100%}
      .btn-row{display:grid!important;grid-template-columns:1fr;gap:12px}
      details.faq-item summary{padding:19px 18px}
      .faq-content{padding:0 18px 20px}
      .footer{margin-top:66px}
    }

    @media (max-width: 520px){
      .content-container{padding-left:16px;padding-right:16px}
      .hero-title{letter-spacing:-.052em}
      .card{border-radius:24px}
      .feature-wide{padding:24px}
      .cta-card{border-radius:28px}
      .metric-num{font-size:30px}
    }

/* roulang page: category1 */
:root {
      --bg: #F7F2EA;
      --bg-soft: #F1E7DD;
      --surface: #FFFDF8;
      --surface-2: #EFE3D7;
      --text: #171413;
      --muted: #74675F;
      --muted-2: #9B8A7C;
      --primary: #6E2438;
      --primary-dark: #4B1726;
      --accent: #B9825B;
      --deep: #241A18;
      --deep-2: #2A1D1B;
      --border: #E4D8CC;
      --ring: rgba(110, 36, 56, .22);
      --shadow: 0 18px 60px rgba(54, 35, 25, .08);
      --shadow-strong: 0 24px 80px rgba(54, 35, 25, .14);
      --radius-xl: 22px;
      --radius-2xl: 30px;
      --side: 276px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      background:
        radial-gradient(circle at 82% 8%, rgba(185, 130, 91, .18), transparent 28%),
        radial-gradient(circle at 12% 92%, rgba(110, 36, 56, .10), transparent 32%),
        linear-gradient(180deg, var(--bg) 0%, #F6F1E8 58%, #EFE3D7 100%);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: geometricPrecision;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -1;
      opacity: .38;
      background-image:
        linear-gradient(rgba(36, 26, 24, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(36, 26, 24, .025) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 72%);
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img, svg {
      display: block;
      max-width: 100%;
    }

    button, input, textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    ::selection {
      background: rgba(110, 36, 56, .18);
      color: var(--primary-dark);
    }

    :focus-visible {
      outline: 3px solid var(--ring);
      outline-offset: 3px;
    }

    .app-shell {
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: var(--side);
      height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 24px 18px;
      background:
        linear-gradient(180deg, rgba(36, 26, 24, .98), rgba(42, 29, 27, .98)),
        radial-gradient(circle at 30% 0%, rgba(185, 130, 91, .24), transparent 34%);
      color: #FFF7EF;
      border-right: 1px solid rgba(255, 255, 255, .08);
      z-index: 50;
    }

    .brand-card {
      padding: 12px 10px 22px;
      border-bottom: 1px solid rgba(255, 255, 255, .10);
    }

    .brand-mark {
      display: inline-flex;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      color: #FFF7EF;
      background:
        linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 14px 32px rgba(0,0,0,.24);
      font-weight: 900;
      letter-spacing: -.06em;
      flex: 0 0 auto;
    }

    .age-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border: 1px solid rgba(243, 213, 190, .28);
      color: #F3D5BE;
      background: rgba(255, 255, 255, .055);
      border-radius: 999px;
      padding: 5px 10px;
      font-size: 12px;
      line-height: 1;
      white-space: nowrap;
    }

    .nav-item {
      position: relative;
      min-height: 48px;
      display: flex;
      align-items: center;
      gap: 11px;
      padding: 12px 13px;
      border-radius: 16px;
      color: rgba(255, 247, 239, .72);
      transition: transform .22s ease, background .22s ease, color .22s ease;
    }

    .nav-item:hover {
      transform: translateX(2px);
      background: rgba(255, 255, 255, .07);
      color: #FFF7EF;
    }

    .nav-item.active {
      background: #FFF7EF;
      color: var(--primary);
      box-shadow: 0 16px 35px rgba(0,0,0,.18);
    }

    .nav-item.active::before {
      content: "";
      position: absolute;
      left: -7px;
      top: 13px;
      bottom: 13px;
      width: 4px;
      border-radius: 999px;
      background: var(--accent);
    }

    .nav-dot {
      width: 9px;
      height: 9px;
      border-radius: 999px;
      background: currentColor;
      opacity: .75;
      box-shadow: 0 0 0 4px rgba(255,255,255,.04);
      flex: 0 0 auto;
    }

    .sidebar-bottom {
      margin-top: auto;
      border-radius: 22px;
      padding: 16px;
      background: rgba(255, 255, 255, .065);
      border: 1px solid rgba(255,255,255,.10);
      color: rgba(255, 247, 239, .72);
    }

    .mobile-topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 60;
      height: 66px;
      align-items: center;
      justify-content: space-between;
      padding: 0 18px;
      background: rgba(255, 253, 248, .92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
    }

    .menu-btn {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text);
      transition: background .2s ease, border-color .2s ease, transform .2s ease;
    }

    .menu-btn:hover {
      background: var(--surface-2);
      border-color: var(--accent);
      transform: translateY(-1px);
    }

    .drawer-mask {
      position: fixed;
      inset: 0;
      display: none;
      background: rgba(23, 20, 19, .46);
      z-index: 70;
    }

    .drawer-mask.open {
      display: block;
    }

    .mobile-drawer {
      position: fixed;
      inset: 0 auto 0 0;
      width: min(88vw, 330px);
      transform: translateX(-105%);
      transition: transform .28s ease;
      z-index: 80;
    }

    .mobile-drawer.open {
      transform: translateX(0);
    }

    .main-content {
      margin-left: var(--side);
      min-height: 100vh;
    }

    .page-wrap {
      width: 100%;
      max-width: 1440px;
      margin: 0 auto;
      padding: 34px 56px 0;
    }

    .section {
      padding: 72px 0;
    }

    .section-tight {
      padding: 48px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border-radius: 999px;
      border: 1px solid rgba(110, 36, 56, .16);
      background: rgba(255, 253, 248, .78);
      padding: 8px 12px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .02em;
      box-shadow: 0 10px 32px rgba(54, 35, 25, .04);
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--accent);
    }

    .hero-panel {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--border);
      border-radius: 34px;
      background:
        linear-gradient(135deg, rgba(255,253,248,.96), rgba(241,231,221,.92)),
        radial-gradient(circle at 90% 20%, rgba(110,36,56,.14), transparent 28%);
      box-shadow: var(--shadow);
    }

    .hero-panel::after {
      content: "";
      position: absolute;
      right: -72px;
      top: -120px;
      width: 330px;
      height: 330px;
      border-radius: 999px;
      border: 1px solid rgba(185, 130, 91, .30);
      background: radial-gradient(circle, rgba(185,130,91,.16), transparent 63%);
      pointer-events: none;
    }

    .breadcrumb a {
      color: var(--muted);
      transition: color .2s ease;
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .hero-title {
      letter-spacing: -.055em;
      line-height: 1.08;
    }

    .stat-card {
      border: 1px solid rgba(228, 216, 204, .92);
      border-radius: 24px;
      background: rgba(255, 253, 248, .78);
      padding: 22px;
      box-shadow: 0 14px 48px rgba(54, 35, 25, .055);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
    }

    .stat-card:hover {
      transform: translateY(-3px);
      border-color: rgba(185, 130, 91, .6);
      box-shadow: var(--shadow);
    }

    .tag-scroll {
      display: flex;
      gap: 12px;
      overflow-x: auto;
      padding: 4px 2px 14px;
      scrollbar-width: thin;
      scrollbar-color: rgba(110,36,56,.35) transparent;
    }

    .tag-scroll::-webkit-scrollbar {
      height: 6px;
    }

    .tag-scroll::-webkit-scrollbar-thumb {
      background: rgba(110,36,56,.35);
      border-radius: 999px;
    }

    .filter-tag {
      display: inline-flex;
      min-height: 42px;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: rgba(255, 253, 248, .82);
      padding: 10px 18px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 800;
      transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
    }

    .filter-tag:hover {
      transform: translateY(-1px);
      border-color: var(--accent);
      color: var(--primary);
      background: #FFF7EF;
    }

    .filter-tag.active {
      background: var(--primary);
      border-color: var(--primary);
      color: #FFF7EF;
      box-shadow: 0 14px 30px rgba(110,36,56,.18);
    }

    .magazine-grid {
      display: grid;
      grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
      gap: 26px;
      align-items: start;
    }

    .feature-sticky {
      position: sticky;
      top: 30px;
    }

    .feature-card,
    .topic-item,
    .process-card,
    .faq-card,
    .note-card {
      border: 1px solid var(--border);
      background: rgba(255, 253, 248, .84);
      box-shadow: 0 12px 42px rgba(54, 35, 25, .045);
      transition: transform .22s ease, border-color .22s ease, background .22s ease, box-shadow .22s ease;
    }

    .feature-card {
      border-radius: 32px;
      overflow: hidden;
    }

    .feature-card:hover,
    .topic-item:hover,
    .process-card:hover,
    .note-card:hover {
      transform: translateY(-3px);
      border-color: rgba(185, 130, 91, .62);
      background: #FFF8F0;
      box-shadow: var(--shadow);
    }

    .abstract-cover {
      position: relative;
      min-height: 250px;
      overflow: hidden;
      background:
        radial-gradient(circle at 15% 12%, rgba(255, 253, 248, .58), transparent 24%),
        radial-gradient(circle at 78% 18%, rgba(185, 130, 91, .45), transparent 30%),
        linear-gradient(135deg, #241A18 0%, #6E2438 48%, #B9825B 100%);
    }

    .abstract-cover::before,
    .abstract-cover::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      border: 1px solid rgba(255, 247, 239, .28);
    }

    .abstract-cover::before {
      width: 230px;
      height: 230px;
      left: -70px;
      bottom: -92px;
    }

    .abstract-cover::after {
      width: 150px;
      height: 150px;
      right: 34px;
      top: 38px;
      background: rgba(255,255,255,.07);
    }

    .cover-lines {
      position: absolute;
      inset: auto 28px 26px 28px;
      display: grid;
      gap: 8px;
    }

    .cover-lines span {
      height: 8px;
      border-radius: 999px;
      background: rgba(255, 247, 239, .28);
    }

    .cover-lines span:nth-child(2) {
      width: 72%;
    }

    .cover-lines span:nth-child(3) {
      width: 46%;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      width: fit-content;
      border-radius: 999px;
      border: 1px solid rgba(185, 130, 91, .34);
      background: rgba(185, 130, 91, .10);
      padding: 6px 10px;
      color: var(--primary);
      font-size: 12px;
      font-weight: 900;
      letter-spacing: .03em;
    }

    .badge.dark {
      border-color: rgba(243, 213, 190, .26);
      background: rgba(255, 255, 255, .08);
      color: #F3D5BE;
    }

    .btn {
      display: inline-flex;
      min-height: 46px;
      align-items: center;
      justify-content: center;
      gap: 9px;
      border-radius: 999px;
      padding: 12px 20px;
      font-size: 14px;
      font-weight: 900;
      transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease;
    }

    .btn-primary {
      border: 1px solid var(--primary);
      background: var(--primary);
      color: #FFF7EF;
      box-shadow: 0 16px 34px rgba(110,36,56,.18);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      background: var(--primary-dark);
      border-color: var(--primary-dark);
      box-shadow: 0 20px 48px rgba(110,36,56,.26);
    }

    .btn-secondary {
      border: 1px solid var(--border);
      background: rgba(255, 253, 248, .72);
      color: var(--text);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      border-color: var(--accent);
      background: #FFF7EF;
      color: var(--primary);
    }

    .topic-list {
      display: grid;
      gap: 16px;
    }

    .topic-item {
      position: relative;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr) auto;
      gap: 18px;
      align-items: center;
      border-radius: 24px;
      padding: 20px;
    }

    .topic-number {
      width: 46px;
      height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      background: var(--surface-2);
      color: var(--primary);
      font-weight: 950;
      letter-spacing: -.03em;
      flex: 0 0 auto;
    }

    .topic-arrow {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      background: var(--surface-2);
      color: var(--primary);
      transition: transform .22s ease, background .22s ease;
    }

    .topic-item:hover .topic-arrow {
      transform: translateX(4px);
      background: rgba(185, 130, 91, .18);
    }

    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 10px;
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 700;
    }

    .meta-row span {
      border-radius: 999px;
      background: rgba(239, 227, 215, .72);
      padding: 4px 9px;
    }

    .explain-panel {
      border-radius: 34px;
      border: 1px solid var(--border);
      background:
        linear-gradient(135deg, rgba(255,253,248,.82), rgba(239,227,215,.72)),
        radial-gradient(circle at 0% 0%, rgba(185,130,91,.16), transparent 34%);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .process-card {
      border-radius: 22px;
      padding: 20px;
    }

    .process-index {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: var(--primary);
      color: #FFF7EF;
      font-size: 13px;
      font-weight: 950;
    }

    details.faq-card {
      border-radius: 22px;
      padding: 0;
      overflow: hidden;
    }

    details.faq-card summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 21px 22px;
      font-weight: 900;
      color: var(--text);
    }

    details.faq-card summary::-webkit-details-marker {
      display: none;
    }

    .faq-icon {
      width: 32px;
      height: 32px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      background: var(--surface-2);
      color: var(--primary);
      flex: 0 0 auto;
      transition: transform .24s ease, background .24s ease;
    }

    details[open] .faq-icon {
      transform: rotate(45deg);
      background: rgba(110, 36, 56, .12);
    }

    .faq-body {
      margin: 0 22px 22px;
      padding: 0 0 0 16px;
      border-left: 3px solid rgba(110, 36, 56, .42);
      color: var(--muted);
      line-height: 1.85;
    }

    .note-card {
      border-radius: 26px;
      padding: 24px;
    }

    .cta-band {
      position: relative;
      overflow: hidden;
      border-radius: 34px;
      background:
        radial-gradient(circle at 88% 16%, rgba(185,130,91,.32), transparent 30%),
        linear-gradient(135deg, var(--deep), var(--primary-dark));
      color: #FFF7EF;
      box-shadow: var(--shadow-strong);
    }

    .cta-band::before {
      content: "";
      position: absolute;
      inset: -1px;
      background-image:
        linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px);
      background-size: 36px 36px;
      opacity: .28;
      pointer-events: none;
    }

    .footer {
      margin-left: var(--side);
      background:
        radial-gradient(circle at 82% 0%, rgba(185,130,91,.16), transparent 30%),
        linear-gradient(180deg, #241A18, #1C1412);
      color: #FFF7EF;
    }

    .footer a {
      color: #D8C7B8;
      transition: color .2s ease, transform .2s ease;
    }

    .footer a:hover {
      color: #F3D5BE;
      transform: translateX(2px);
    }

    .footer-note {
      color: #CDBCAE;
    }

    .divider {
      width: 100%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(110,36,56,.24), transparent);
    }

    @media (max-width: 1180px) {
      :root {
        --side: 236px;
      }

      .page-wrap {
        padding-left: 36px;
        padding-right: 36px;
      }

      .magazine-grid {
        grid-template-columns: 1fr;
      }

      .feature-sticky {
        position: static;
      }
    }

    @media (max-width: 1023px) {
      .sidebar {
        display: none;
      }

      .mobile-topbar {
        display: flex;
      }

      .main-content,
      .footer {
        margin-left: 0;
      }

      .page-wrap {
        padding: 26px 24px 0;
      }

      .section {
        padding: 58px 0;
      }

      .section-tight {
        padding: 40px 0;
      }

      .hero-title {
        line-height: 1.14;
      }
    }

    @media (max-width: 767px) {
      .page-wrap {
        padding: 20px 18px 0;
      }

      .hero-panel {
        border-radius: 26px;
      }

      .stat-card {
        padding: 18px;
      }

      .abstract-cover {
        min-height: 210px;
      }

      .topic-item {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 18px;
      }

      .topic-number {
        width: 40px;
        height: 40px;
      }

      .topic-arrow {
        justify-self: start;
      }

      .process-grid {
        grid-template-columns: 1fr;
      }

      .cta-band {
        border-radius: 26px;
      }
    }

    @media (max-width: 520px) {
      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 14px;
      }

      .mobile-topbar {
        padding-inline: 14px;
      }

      .hero-title {
        font-size: 34px;
        letter-spacing: -.045em;
      }

      .btn {
        width: 100%;
      }

      .tag-scroll {
        margin-inline: -18px;
        padding-left: 18px;
        padding-right: 18px;
      }
    }