/* roulang page: index */
:root {
      --ink: #161814;
      --ink-soft: #3a4038;
      --paper: #f5f1e8;
      --paper-2: #ebe6db;
      --mist: #e4eee4;
      --mist-2: #d3e0d3;
      --sodium: #d56b20;
      --sodium-deep: #b45312;
      --sodium-soft: #f3d2b3;
      --olive: #3b5742;
      --olive-deep: #24362a;
      --line: #d6d0c4;
      --line-strong: #c3bbae;
      --cream: #fbf7ef;
      --white: #fffcf6;
      --dark: #111310;
      --dark-2: #1b1e19;
      --muted: #667066;
      --muted-2: #8a9086;
      --radius: 18px;
      --radius-sm: 10px;
      --radius-pill: 999px;
      --shadow: 0 10px 28px rgba(17, 19, 16, 0.07);
      --shadow-hover: 0 14px 32px rgba(17, 19, 16, 0.1);
      --header-h: 118px;
      --container: 1220px;
      --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
      --focus: 0 0 0 3px rgba(213, 107, 32, 0.35);
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--font);
      color: var(--ink);
      background: var(--paper);
      line-height: 1.8;
      font-size: 16px;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, textarea, select { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4, p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    table { border-collapse: collapse; }
    :focus-visible { outline: 2px solid var(--sodium); outline-offset: 3px; box-shadow: var(--focus); }
    .skip {
      position: absolute; left: 12px; top: -48px; z-index: 100;
      background: var(--sodium); color: #fff; padding: 10px 16px; border-radius: 10px;
    }
    .skip:focus { top: 12px; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }
    .site-header {
      position: fixed; inset: 0 0 auto 0; z-index: 80;
      background: rgba(245, 241, 232, 0.72);
      border-bottom: 1px solid transparent;
      transition: background 280ms var(--ease), border-color 280ms var(--ease), box-shadow 280ms var(--ease);
    }
    .site-header.is-scrolled {
      background: #f3efe6;
      border-bottom-color: var(--line);
      box-shadow: 0 8px 18px rgba(17, 19, 16, 0.05);
    }
    .topbar {
      display: flex; align-items: center; justify-content: space-between;
      min-height: 36px; gap: 16px;
      border-bottom: 1px solid rgba(198, 190, 176, 0.45);
      font-size: 12px; color: var(--olive);
    }
    .topbar-tags { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
    .mini-tag {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 3px 10px; border: 1px solid var(--line); border-radius: var(--radius-pill);
      background: rgba(255, 252, 246, 0.7); color: var(--olive-deep); letter-spacing: 0.04em;
    }
    .mini-tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--sodium); display: inline-block; }
    .topbar-links { display: flex; align-items: center; gap: 18px; }
    .topbar-links a {
      display: inline-flex; align-items: center; min-height: 32px; color: var(--ink-soft);
    }
    .topbar-links a:hover { color: var(--sodium-deep); }
    .nav-row {
      display: flex; align-items: center; justify-content: space-between;
      min-height: 82px; gap: 20px;
    }
    .logo {
      display: flex; align-items: center; gap: 12px; min-height: 44px; min-width: 44px;
    }
    .logo-mark {
      width: 42px; height: 42px; border-radius: 12px;
      background: var(--dark); color: var(--cream);
      display: grid; place-items: center; flex: 0 0 auto;
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 18px; letter-spacing: 0.08em; }
    .logo-text span { font-size: 12px; color: var(--olive); letter-spacing: 0.18em; margin-top: 3px; }
    .nav-links { display: flex; align-items: center; gap: 4px; }
    .nav-links a {
      position: relative; display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 12px; font-size: 14px; color: var(--ink-soft);
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 8px; height: 2px;
      background: var(--sodium); transform: scaleX(0); transform-origin: left;
      transition: transform 280ms var(--ease);
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--ink); }
    .nav-links a.is-active::after, .nav-links a:hover::after { transform: scaleX(1); }
    .header-cta { display: flex; align-items: center; gap: 10px; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; min-width: 44px; padding: 0 20px; border-radius: var(--radius-pill);
      font-size: 14px; letter-spacing: 0.04em; transition: transform 240ms var(--ease), background 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease), box-shadow 240ms var(--ease);
    }
    .btn:active { transform: translateY(1px); }
    .btn-primary { background: var(--sodium); color: #fff; }
    .btn-primary:hover { background: var(--sodium-deep); box-shadow: 0 8px 18px rgba(180, 83, 18, 0.25); }
    .btn-ghost {
      background: transparent; color: var(--cream); border: 1px solid rgba(251, 247, 239, 0.45);
    }
    .btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.06); }
    .btn-line {
      background: transparent; color: var(--ink); border: 1px solid var(--line-strong);
    }
    .btn-line:hover { border-color: var(--sodium); color: var(--sodium-deep); }
    .btn-dark { background: var(--dark); color: var(--cream); }
    .btn-dark:hover { background: #000; }
    .menu-toggle {
      display: none; width: 44px; height: 44px; border-radius: 12px;
      border: 1px solid var(--line); align-items: center; justify-content: center; flex-direction: column; gap: 5px;
    }
    .menu-toggle span { width: 18px; height: 1.5px; background: var(--ink); display: block; transition: 220ms var(--ease); }
    .menu-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
    .menu-toggle.is-open span:nth-child(2) { opacity: 0; }
    .menu-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
    .drawer {
      position: fixed; inset: 0; z-index: 90; display: none;
    }
    .drawer.is-open { display: block; }
    .drawer-mask { position: absolute; inset: 0; background: rgba(17,19,16,0.46); }
    .drawer-panel {
      position: absolute; top: 0; right: 0; width: min(86vw, 360px); height: 100%;
      background: var(--cream); padding: 28px 22px 32px; overflow: auto;
      transform: translateX(24px); animation: drawerIn 320ms var(--ease) forwards;
    }
    @keyframes drawerIn { to { transform: translateX(0); } }
    .drawer-panel a.d-link {
      display: flex; align-items: center; min-height: 48px;
      border-bottom: 1px solid var(--line); font-size: 16px;
    }
    .drawer-meta { margin: 22px 0; color: var(--olive); font-size: 14px; display: grid; gap: 8px; }
    main { overflow: clip; }
    section { position: relative; }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--olive); letter-spacing: 0.18em; font-size: 12px; text-transform: none;
    }
    .kicker::before { content: ""; width: 18px; height: 1px; background: var(--sodium); }
    .h2 {
      font-size: clamp(30px, 4vw, 46px); line-height: 1.22; letter-spacing: 0.02em;
      font-weight: 650; margin: 12px 0 16px;
    }
    .lead { font-size: 16px; line-height: 1.85; color: var(--ink-soft); max-width: 68ch; }
    .hero {
      min-height: 720px; color: var(--cream); position: relative;
      padding-top: var(--header-h);
    }
    .hero-slider { position: absolute; inset: 0; overflow: hidden; }
    .slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden;
      transition: opacity 700ms var(--ease), visibility 700ms;
    }
    .slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
    .slide img {
      width: 100%; height: 100%; object-fit: cover; transform: scale(1.04);
      animation: ken 18s linear infinite;
    }
    .slide.is-active img { animation-play-state: running; }
    @keyframes ken { 0% { transform: scale(1.04) translate3d(0,0,0);} 100% { transform: scale(1.1) translate3d(-1.5%, -1%, 0);} }
    .slide-mask {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(17,19,16,0.82) 0%, rgba(17,19,16,0.58) 42%, rgba(17,19,16,0.28) 100%),
        linear-gradient(180deg, rgba(17,19,16,0.18), rgba(17,19,16,0.55));
    }
    .hero-grid {
      position: relative; z-index: 2;
      display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 36px;
      align-items: end; min-height: calc(720px - var(--header-h));
      padding: 28px 0 30px;
    }
    .hero-copy h1 {
      font-size: clamp(34px, 5.4vw, 68px); line-height: 1.12; letter-spacing: 0.01em;
      max-width: 12ch; margin: 10px 0 18px; font-weight: 670;
    }
    .hero-intro { font-size: 16px; line-height: 1.85; max-width: 46ch; color: rgba(251,247,239,0.86); }
    .reward-list { display: grid; gap: 8px; margin: 22px 0 18px; }
    .reward-list li {
      display: grid; grid-template-columns: 18px 1fr; gap: 10px; align-items: start;
      color: rgba(251,247,239,0.92); font-size: 14px;
    }
    .reward-list b { color: var(--sodium-soft); font-weight: 600; }
    .dot-check {
      width: 16px; height: 16px; margin-top: 6px; border-radius: 50%;
      border: 1px solid var(--sodium); position: relative;
    }
    .dot-check::after {
      content: ""; position: absolute; left: 4px; top: 4px; width: 6px; height: 6px;
      background: var(--sodium); border-radius: 50%;
    }
    .invite-progress { margin: 8px 0 22px; max-width: 420px; }
    .invite-progress .row { display: flex; justify-content: space-between; font-size: 13px; color: rgba(251,247,239,0.78); margin-bottom: 8px; }
    .bar {
      height: 6px; background: rgba(255,255,255,0.14); border-radius: 99px; overflow: hidden;
    }
    .bar > span {
      display: block; height: 100%; width: 0; background: var(--sodium);
      transition: width 900ms var(--ease);
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-side {
      display: grid; gap: 14px; justify-items: stretch; padding-bottom: 8px;
    }
    .ticket {
      background: var(--cream); color: var(--ink); border-radius: 16px;
      padding: 16px 18px 14px; position: relative; overflow: hidden;
      box-shadow: var(--shadow);
    }
    .ticket::before, .ticket::after {
      content: ""; position: absolute; top: 50%; width: 16px; height: 16px; background: var(--dark);
      border-radius: 50%; transform: translateY(-50%);
    }
    .ticket::before { left: -8px; }
    .ticket::after { right: -8px; }
    .ticket .code { font-size: 12px; letter-spacing: 0.16em; color: var(--olive); }
    .ticket h3 { font-size: 18px; margin: 6px 0 4px; }
    .ticket p { font-size: 13px; color: var(--ink-soft); line-height: 1.7; }
    .ticket .stamp {
      position: absolute; right: 16px; top: 14px; width: 46px; height: 46px; border-radius: 50%;
      border: 1.5px dashed var(--sodium); color: var(--sodium); font-size: 11px;
      display: grid; place-items: center; transform: rotate(12deg); letter-spacing: 0.08em;
    }
    .hero-controls {
      position: relative; z-index: 3;
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
      padding: 0 0 18px;
    }
    .pager { display: flex; align-items: center; gap: 14px; color: rgba(251,247,239,0.8); font-size: 13px; }
    .track { width: min(240px, 34vw); height: 2px; background: rgba(255,255,255,0.2); overflow: hidden; }
    .track > span { display: block; height: 100%; width: 0; background: var(--sodium); }
    .ctrl-btns { display: flex; gap: 8px; }
    .icon-btn {
      width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.28);
      color: #fff; display: grid; place-items: center; background: rgba(17,19,16,0.28);
    }
    .icon-btn:hover { border-color: #fff; background: rgba(17,19,16,0.5); }
    .param-strip {
      position: relative; z-index: 3; background: rgba(17,19,16,0.72);
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .param-strip .container {
      display: grid; grid-template-columns: repeat(3, 1fr); min-height: 86px;
    }
    .param-item { padding: 16px 18px; border-right: 1px solid rgba(255,255,255,0.08); }
    .param-item:last-child { border-right: 0; }
    .param-item small { display: block; color: var(--sodium-soft); letter-spacing: 0.16em; font-size: 11px; }
    .param-item strong { display: block; margin-top: 4px; font-size: 18px; }
    .param-item span { display: block; font-size: 13px; color: rgba(251,247,239,0.7); }
    .coupon-wall {
      background: var(--paper); color: var(--ink); padding: 28px 0 8px;
    }
    .coupon-head { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 18px; }
    .coupon-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 16px; }
    .coupon-card {
      background: var(--white); border: 1px dashed var(--line-strong); border-radius: 16px;
      padding: 20px; min-height: 150px; position: relative;
      transition: transform 260ms var(--ease), border-color 260ms var(--ease);
    }
    .coupon-card:hover { transform: translateY(-4px); border-color: var(--sodium); }
    .coupon-card .amt { font-size: 28px; color: var(--sodium-deep); line-height: 1; margin: 8px 0; }
    .coupon-card p { font-size: 13px; color: var(--ink-soft); }
    .rule-box {
      margin-top: 16px; padding: 16px 18px; background: var(--mist); border-radius: 14px;
      display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center;
    }
    .rule-box p { font-size: 13px; color: var(--ink-soft); }
    #solution { padding: 120px 0; background: var(--paper); }
    .split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: start; }
    .issue-list { display: grid; }
    .issue {
      display: grid; grid-template-columns: 72px 1fr; gap: 16px;
      padding: 22px 0; border-bottom: 1px solid var(--line);
    }
    .issue:first-child { border-top: 1px solid var(--line); }
    .issue .idx { font-size: 28px; color: var(--sodium); line-height: 1; }
    .issue h3 { font-size: 20px; margin-bottom: 6px; }
    .issue p { color: var(--ink-soft); font-size: 15px; max-width: 52ch; }
    .issue-visual {
      margin-top: 28px; border-radius: var(--radius); overflow: hidden; position: relative;
    }
    .issue-visual img { width: 100%; height: 280px; object-fit: cover; }
    #about { padding: 120px 0; background: var(--mist); }
    .about-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
    .about-visual { position: relative; }
    .about-visual img { width: 100%; height: 560px; object-fit: cover; border-radius: 20px; }
    .float-note {
      position: absolute; left: 18px; bottom: 18px; right: 18px;
      background: rgba(251,247,239,0.94); border-radius: 14px; padding: 14px 16px;
      border: 1px solid var(--line);
    }
    .float-note strong { display: block; font-size: 14px; margin-bottom: 4px; }
    .float-note span { font-size: 13px; color: var(--ink-soft); }
    .chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
    .chip {
      display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px;
      border-radius: 10px; border: 1px solid var(--olive); color: var(--olive-deep); font-size: 13px; background: var(--white);
    }
    .verify {
      display: grid; gap: 10px; margin-top: 8px;
    }
    .verify li {
      display: grid; grid-template-columns: 96px 1fr; gap: 10px; font-size: 14px;
      padding: 10px 0; border-bottom: 1px solid rgba(59,87,66,0.16);
    }
    .verify b { color: var(--olive); font-weight: 600; }
    #process { padding: 120px 0; background: var(--paper); overflow: hidden; }
    .steps {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 42px; position: relative;
    }
    .steps::before {
      content: ""; position: absolute; left: 4%; right: 4%; top: 28px; height: 1px; background: var(--line-strong);
    }
    .step { padding: 0 16px 0 0; position: relative; }
    .step .no {
      width: 56px; height: 56px; border-radius: 50%; background: var(--dark); color: var(--cream);
      display: grid; place-items: center; font-size: 18px; position: relative; z-index: 1;
    }
    .step small { display: block; margin: 16px 0 6px; color: var(--sodium-deep); letter-spacing: 0.14em; font-size: 12px; }
    .step h3 { font-size: 22px; margin-bottom: 8px; }
    .step p { font-size: 14px; color: var(--ink-soft); max-width: 28ch; }
    .lattice {
      position: absolute; right: -80px; top: 40px; width: 280px; height: 280px; opacity: 0.18; pointer-events: none;
    }
    #advantages { padding: 120px 0; background: var(--mist); }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
    .adv-card {
      background: var(--cream); border: 1px solid transparent; border-radius: 18px; padding: 26px 24px;
      min-height: 210px; transition: transform 280ms var(--ease), border-color 280ms var(--ease), box-shadow 280ms var(--ease);
      position: relative;
    }
    .adv-card::after {
      content: ""; position: absolute; left: 24px; right: 24px; bottom: 0; height: 2px;
      background: var(--sodium); transform: scaleX(0); transform-origin: left; transition: transform 320ms var(--ease);
    }
    .adv-card:hover { transform: translateY(-5px); border-color: var(--line); box-shadow: var(--shadow); }
    .adv-card:hover::after { transform: scaleX(1); }
    .adv-card.featured {
      background: var(--dark); color: var(--cream); grid-column: span 1;
    }
    .adv-card.featured p { color: rgba(251,247,239,0.74); }
    .adv-card h3 { font-size: 20px; margin: 12px 0 8px; }
    .adv-card p { font-size: 14px; color: var(--ink-soft); }
    .adv-no { font-size: 13px; letter-spacing: 0.16em; color: var(--olive); }
    .featured .adv-no { color: var(--sodium-soft); }
    .big-metric { font-size: 42px; line-height: 1; margin: 10px 0; color: var(--sodium); }
    #products { padding: 120px 0; background: var(--paper); }
    .product-stage {
      display: grid; grid-template-columns: 1.25fr 0.9fr 0.9fr; gap: 18px; align-items: stretch; margin-top: 36px;
    }
    .prod {
      border-radius: 20px; overflow: hidden; background: var(--white); border: 1px solid var(--line);
      display: flex; flex-direction: column; min-height: 100%;
      transition: transform 280ms var(--ease);
    }
    .prod:hover { transform: translateY(-5px); }
    .prod.dark { background: var(--dark); color: var(--cream); border-color: transparent; }
    .prod img { width: 100%; height: 210px; object-fit: cover; }
    .prod-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .prod-tags { display: flex; gap: 6px; flex-wrap: wrap; }
    .tag {
      font-size: 12px; min-height: 28px; padding: 0 10px; border-radius: 999px;
      background: var(--mist); color: var(--olive-deep); display: inline-flex; align-items: center;
    }
    .dark .tag { background: rgba(255,255,255,0.08); color: var(--sodium-soft); }
    .spec { width: 100%; font-size: 13px; }
    .spec tr td { padding: 7px 0; border-bottom: 1px solid rgba(198,190,176,0.45); }
    .dark .spec tr td { border-bottom-color: rgba(255,255,255,0.08); }
    .spec td:first-child { color: var(--muted); width: 42%; }
    .prod .btn { margin-top: auto; align-self: flex-start; }
    #insight {
      padding: 120px 0; background: var(--dark); color: var(--cream); overflow: hidden;
    }
    .insight-bg {
      position: absolute; inset: 0; opacity: 0.28;
    }
    .insight-bg img { width: 100%; height: 100%; object-fit: cover; }
    .insight-bg::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(17,19,16,0.92), rgba(17,19,16,0.72) 55%, rgba(17,19,16,0.55));
    }
    .insight-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; }
    .insight-title { font-size: clamp(36px, 5vw, 64px); line-height: 1.12; max-width: 8em; }
    .scale-line { width: 72px; height: 2px; background: var(--sodium); margin: 22px 0; }
    .tri { display: grid; gap: 16px; }
    .tri article {
      padding-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .tri small { color: var(--sodium-soft); letter-spacing: 0.18em; font-size: 11px; }
    .tri h3 { font-size: 20px; margin: 4px 0; }
    .tri p { color: rgba(251,247,239,0.72); font-size: 14px; }
    .data-mesh {
      display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.08); margin-top: 8px;
    }
    .data-mesh div { background: rgba(17,19,16,0.55); padding: 18px; min-height: 110px; }
    .data-mesh b { display: block; font-size: 28px; color: var(--sodium); }
    #stories { padding: 120px 0 80px; background: var(--paper); }
    .story-track {
      display: grid; grid-auto-flow: column; grid-auto-columns: minmax(78%, 520px);
      gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 10px 2px 28px;
      scrollbar-width: thin;
    }
    .story {
      scroll-snap-align: start; background: var(--white); border-radius: 20px; overflow: hidden;
      border: 1px solid var(--line); min-height: 100%; display: grid; grid-template-columns: 0.9fr 1.1fr;
    }
    .story img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
    .story-body { padding: 24px; display: grid; gap: 10px; align-content: start; }
    .meta-4 { display: grid; gap: 8px; font-size: 13px; }
    .meta-4 div { display: grid; grid-template-columns: 76px 1fr; gap: 8px; }
    .meta-4 b { color: var(--olive); font-weight: 600; }
    .story-dots { display: flex; gap: 8px; }
    .story-dots button {
      width: 44px; height: 8px; border-radius: 99px; background: var(--line); min-width: 44px;
    }
    .story-dots button.is-on { background: var(--sodium); }
    #results { padding: 72px 0; background: #dfe8dc; }
    .stat-row { display: grid; grid-template-columns: repeat(4, 1fr); }
    .stat {
      padding: 12px 18px; text-align: left; border-right: 1px solid rgba(59,87,66,0.18);
    }
    .stat:last-child { border-right: 0; }
    .stat b { display: block; font-size: 48px; line-height: 1; color: var(--olive-deep); }
    .stat em { font-style: normal; font-size: 14px; color: var(--sodium-deep); margin-left: 4px; }
    .stat span { display: block; margin-top: 8px; color: var(--ink-soft); font-size: 14px; }
    #testimonials { padding: 120px 0; background: var(--mist); }
    .quote-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 18px; margin-top: 32px; }
    .quote {
      background: var(--cream); border-radius: 20px; padding: 32px; border: 1px solid transparent;
    }
    .quote .mark { font-size: 54px; line-height: 0.6; color: var(--sodium); font-family: Georgia, serif; }
    .quote p { font-size: 18px; line-height: 1.75; margin: 16px 0 22px; }
    .who { display: flex; gap: 12px; align-items: center; }
    .avatar {
      width: 44px; height: 44px; border-radius: 50%; background: var(--dark);
      display: grid; place-items: center; color: var(--cream); font-size: 12px;
    }
    .who small { display: block; color: var(--muted); }
    .quote-clips { display: grid; gap: 12px; }
    .clip {
      background: var(--white); border-radius: 16px; padding: 18px 20px; font-size: 14px; color: var(--ink-soft);
    }
    #applications { padding: 120px 0; background: var(--paper); }
    .scene-board {
      display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 28px; margin-top: 32px; align-items: stretch;
    }
    .scene-pic { position: relative; border-radius: 20px; overflow: hidden; min-height: 520px; }
    .scene-pic img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .hotspot {
      position: absolute; width: 44px; height: 44px; border-radius: 50%;
      background: rgba(213,107,32,0.92); color: #fff; display: grid; place-items: center; font-size: 14px;
      box-shadow: 0 0 0 8px rgba(213,107,32,0.18);
    }
    .scene-list { display: grid; gap: 0; }
    .scene-item {
      display: grid; grid-template-columns: 48px 1fr; gap: 12px; padding: 18px 8px;
      border-bottom: 1px solid var(--line);
    }
    .scene-item h3 { font-size: 18px; margin-bottom: 4px; }
    .scene-item p { font-size: 14px; color: var(--ink-soft); }
    #news { padding: 120px 0; background: var(--mist); }
    .news-layout { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 22px; margin-top: 32px; }
    .news-main {
      background: var(--white); border-radius: 20px; overflow: hidden; border: 1px solid transparent;
      transition: border-color 260ms var(--ease);
    }
    .news-main:hover { border-color: var(--sodium); }
    .news-main img { width: 100%; height: 320px; object-fit: cover; }
    .news-main .pad { padding: 22px; }
    .news-list { display: grid; align-content: start; }
    .news-item {
      display: grid; grid-template-columns: 96px 1fr; gap: 14px; padding: 18px 6px;
      border-bottom: 1px solid var(--line); cursor: pointer; background: transparent; text-align: left; width: 100%;
    }
    .news-item:hover .date { transform: translateX(4px); color: var(--sodium-deep); }
    .date { font-size: 13px; color: var(--olive); transition: 240ms var(--ease); padding-top: 4px; }
    .news-item h3 { font-size: 16px; }
    .news-item p { font-size: 13px; color: var(--ink-soft); margin-top: 4px; }
    #faq { padding: 120px 0; background: var(--paper); }
    .faq-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; }
    .acc { border-top: 1px solid var(--line); }
    .acc-item { border-bottom: 1px solid var(--line); }
    .acc-btn {
      width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px;
      min-height: 64px; text-align: left; font-size: 16px; padding: 12px 0; color: var(--ink);
    }
    .acc-btn .plus {
      width: 28px; height: 28px; position: relative; flex: 0 0 auto;
    }
    .acc-btn .plus::before, .acc-btn .plus::after {
      content: ""; position: absolute; background: var(--ink); transition: 220ms var(--ease);
    }
    .acc-btn .plus::before { left: 13px; top: 6px; width: 2px; height: 16px; }
    .acc-btn .plus::after { left: 6px; top: 13px; width: 16px; height: 2px; }
    .acc-btn[aria-expanded="true"] .plus::before { transform: rotate(90deg); opacity: 0; }
    .acc-panel { display: none; padding: 0 8px 18px 0; color: var(--ink-soft); font-size: 15px; }
    .acc-item.is-open .acc-panel { display: block; }
    #contact { padding: 120px 0; background: var(--cream); }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .contact-title { font-size: clamp(34px, 4.5vw, 56px); line-height: 1.15; max-width: 8em; }
    .dir-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0; }
    .contact-card {
      background: var(--white); border-radius: 20px; padding: 28px; border: 1px solid var(--line); box-shadow: var(--shadow);
    }
    .form { display: grid; gap: 14px; }
    label { font-size: 13px; color: var(--olive-deep); }
    .field {
      width: 100%; min-height: 48px; border-radius: 12px; border: 1px solid var(--line);
      background: var(--paper); padding: 12px 14px; color: var(--ink); font-size: 15px;
    }
    textarea.field { min-height: 110px; resize: vertical; }
    .field:focus { outline: none; border-color: var(--sodium); box-shadow: var(--focus); background: #fff; }
    .field.is-error { border-color: #b42318; }
    .hint { font-size: 12px; color: #b42318; min-height: 16px; }
    .form-ok {
      display: none; padding: 14px 16px; background: var(--mist); border-radius: 12px; color: var(--olive-deep);
    }
    .form-ok.is-show { display: block; }
    .reach { display: grid; gap: 8px; margin-top: 18px; font-size: 14px; color: var(--ink-soft); }
    .site-footer { background: var(--dark); color: var(--cream); padding: 72px 0 28px; }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 1fr 0.9fr; gap: 32px; }
    .foot-brand p { color: rgba(251,247,239,0.72); font-size: 14px; max-width: 36ch; margin-top: 12px; }
    .foot-grid h3 { font-size: 14px; letter-spacing: 0.16em; margin-bottom: 14px; color: var(--sodium-soft); }
    .foot-grid a, .foot-grid p { font-size: 14px; color: rgba(251,247,239,0.8); }
    .foot-grid a { display: inline-flex; min-height: 36px; align-items: center; }
    .foot-grid a:hover { color: #fff; }
    .legal {
      margin-top: 36px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.08);
      display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
      color: rgba(251,247,239,0.7); font-size: 13px;
    }
    .modal {
      position: fixed; inset: 0; z-index: 120; display: none; align-items: center; justify-content: center;
      padding: 20px;
    }
    .modal.is-open { display: flex; }
    .modal-mask { position: absolute; inset: 0; background: rgba(17,19,16,0.55); }
    .modal-card {
      position: relative; width: min(680px, 100%); max-height: 82vh; overflow: auto;
      background: var(--cream); border-radius: 18px; padding: 28px; box-shadow: var(--shadow-hover);
    }
    .close-x {
      position: absolute; right: 12px; top: 12px; width: 44px; height: 44px; border-radius: 50%;
    }
    @media (max-width: 1280px) {
      .container { width: min(1120px, calc(100% - 36px)); }
      .hero-copy h1 { font-size: 56px; }
    }
    @media (max-width: 1024px) {
      :root { --header-h: 108px; }
      .nav-links { display: none; }
      .header-cta .btn { display: none; }
      .menu-toggle { display: inline-flex; }
      .hero { min-height: 640px; }
      .hero-grid, .split, .about-grid, .insight-grid, .product-stage, .quote-grid, .scene-board, .news-layout, .faq-grid, .contact-grid, .foot-grid, .coupon-grid {
        grid-template-columns: 1fr;
      }
      .hero-copy h1 { font-size: 44px; max-width: 12ch; }
      .about-visual img, .scene-pic { height: 380px; min-height: 380px; }
      .steps { grid-template-columns: 1fr 1fr; gap: 24px; }
      .steps::before { display: none; }
      .adv-grid { grid-template-columns: 1fr 1fr; }
      .stat b { font-size: 36px; }
      .story { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .topbar { display: none; }
      .nav-row { min-height: 64px; }
      :root { --header-h: 64px; }
      section, #solution, #about, #process, #advantages, #products, #insight, #stories, #testimonials, #applications, #news, #faq, #contact {
        padding: 68px 0;
      }
      #results { padding: 48px 0; }
      .h2 { font-size: 30px; }
      .hero { min-height: 620px; }
      .hero-copy h1 { font-size: 38px; }
      .param-strip .container, .stat-row { grid-template-columns: 1fr 1fr; }
      .param-item, .stat { border-bottom: 1px solid rgba(255,255,255,0.08); }
      .stat { border-right: 1px solid rgba(59,87,66,0.18); }
      .stat:nth-child(2n) { border-right: 0; }
      .adv-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr; }
      .step { padding-left: 18px; border-left: 1px solid var(--line); margin-left: 18px; }
      .coupon-head, .rule-box, .legal { grid-template-columns: 1fr; display: grid; }
      .hero-actions, .header-cta { width: 100%; }
      .issue { grid-template-columns: 48px 1fr; }
    }
    @media (max-width: 480px) {
      .container { width: calc(100% - 28px); }
      .hero-copy h1 { font-size: 34px; }
      .btn { width: 100%; }
      .hero-actions { flex-direction: column; }
      .ctrl-btns { width: 100%; justify-content: flex-end; }
      .verify li, .meta-4 div, .news-item { grid-template-columns: 1fr; }
      .product-stage, .story-track { grid-auto-columns: 88%; }
      .contact-title { font-size: 34px; }
    }
    @media (max-width: 375px) {
      body { overflow-x: hidden; }
      .hero-copy h1 { font-size: 34px; }
      .param-item strong { font-size: 16px; }
      .stat b { font-size: 30px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation: none !important; transition: none !important; scroll-behavior: auto !important;
      }
      .slide img { transform: none; }
    }

/* roulang page: index */
:root {
      --ink: #161412;
      --ink-soft: #2c2824;
      --charcoal: #1e1b18;
      --ash: #3a3530;
      --salt: #f6f3ee;
      --warm: #ece6dc;
      --mineral: #ddd6cc;
      --paper: #fbf8f3;
      --line: #d8d0c6;
      --line-strong: #b7aea2;
      --muted: #6f675e;
      --copper: #c45b27;
      --copper-deep: #9a4318;
      --copper-soft: #e8c2a8;
      --olive: #6b7a63;
      --olive-soft: #dce4d6;
      --white: #fffdf9;
      --danger: #8a2f1f;
      --ok: #3f5c45;
      --radius-sm: 10px;
      --radius: 14px;
      --radius-lg: 22px;
      --pill: 999px;
      --shadow: 0 10px 30px rgba(40, 32, 24, 0.08);
      --shadow-hover: 0 16px 36px rgba(40, 32, 24, 0.14);
      --shadow-warm: 0 8px 24px rgba(196, 91, 39, 0.18);
      --container: 1240px;
      --nav-h: 74px;
      --info-h: 36px;
      --space: 24px;
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
      --z-nav: 80;
      --z-drawer: 90;
      --z-overlay: 85;
      --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --num: ui-sans-serif, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      color: var(--ink);
      background: var(--paper);
      font-size: 16px;
      line-height: 1.7;
      letter-spacing: 0.01em;
    }
    img { max-width: 100%; display: block; height: auto; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4, p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible {
      outline: 2px solid var(--copper);
      outline-offset: 3px;
    }
    .skip {
      position: absolute;
      left: 12px;
      top: -40px;
      background: var(--ink);
      color: var(--white);
      padding: 8px 14px;
      border-radius: 8px;
      z-index: 100;
    }
    .skip:focus { top: 12px; }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: var(--z-nav);
      transition: background 280ms var(--ease), box-shadow 280ms var(--ease);
    }
    .site-header.is-solid {
      background: rgba(251, 248, 243, 0.96);
      box-shadow: 0 8px 24px rgba(28, 24, 20, 0.08);
    }
    .infobar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: var(--info-h);
      padding: 0 4px;
      background: #efe8dd;
      border-bottom: 1px solid rgba(22, 20, 18, 0.06);
      font-size: 12px;
      color: var(--ash);
    }
    .infobar-left, .infobar-right {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }
    .brand-chip, .tech-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 2px 8px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 253, 249, 0.7);
    }
    .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--copper);
    }
    .infobar a { color: var(--ash); }
    .infobar a:hover { color: var(--copper-deep); }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: var(--nav-h);
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
      position: relative;
    }
    .site-header:not(.is-solid) .navbar { color: var(--ink); }
    .logo {
      display: flex;
      flex-direction: column;
      line-height: 1.15;
      min-width: 132px;
    }
    .logo-mark {
      font-size: 12px;
      letter-spacing: 0.22em;
      color: var(--copper-deep);
      font-weight: 600;
    }
    .logo-name {
      font-size: 20px;
      font-weight: 730;
      letter-spacing: 0.08em;
    }
    .nav-panel {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 1;
      justify-content: flex-end;
    }
    .nav-list {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-list a {
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 0 12px;
      font-size: 14px;
      color: var(--ink-soft);
    }
    .nav-list a::after {
      content: "";
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 10px;
      height: 1px;
      background: var(--copper);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 220ms var(--ease);
    }
    .nav-list a:hover, .nav-list a.is-active { color: var(--ink); }
    .nav-list a:hover::after, .nav-list a.is-active::after { transform: scaleX(1); }
    .nav-toggle, .nav-close {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: var(--white);
    }
    .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
      display: block;
      width: 18px;
      height: 1.5px;
      background: var(--ink);
      position: relative;
    }
    .nav-toggle span::before, .nav-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }
    .nav-toggle span::before { top: -6px; }
    .nav-toggle span::after { top: 6px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 0 20px;
      border-radius: var(--pill);
      font-size: 14px;
      font-weight: 650;
      letter-spacing: 0.04em;
      transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
      border: 1px solid transparent;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn:disabled, .btn.is-disabled {
      opacity: 0.45;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }
    .btn-primary {
      background: var(--copper);
      color: #1c120c;
      box-shadow: var(--shadow-warm);
    }
    .btn-primary:hover { background: #d36a32; box-shadow: 0 12px 28px rgba(196, 91, 39, 0.24); }
    .btn-dark {
      background: var(--ink);
      color: var(--white);
    }
    .btn-dark:hover { background: #2a2521; }
    .btn-ghost {
      border-color: rgba(255, 253, 249, 0.55);
      color: var(--white);
      background: rgba(22, 20, 18, 0.18);
    }
    .btn-ghost:hover { background: rgba(255, 253, 249, 0.12); }
    .btn-line {
      border-color: var(--line-strong);
      color: var(--ink);
      background: transparent;
    }
    .btn-line:hover { background: var(--warm); }
    .badge, .tag {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 8px;
      background: var(--warm);
      color: var(--ink-soft);
      font-size: 12px;
      letter-spacing: 0.04em;
    }
    .tag-copper {
      background: transparent;
      border: 1px solid var(--copper-soft);
      color: var(--copper-deep);
    }
    .hero {
      position: relative;
      min-height: 680px;
      color: var(--white);
      overflow: hidden;
      background: var(--charcoal);
    }
    .hero-slides { position: absolute; inset: 0; }
    .hero-slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      visibility: hidden;
      transition: opacity 500ms var(--ease), visibility 500ms var(--ease);
    }
    .hero-slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
    .hero-slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transform: scale(1.04);
    }
    .hero-mask {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(18, 16, 14, 0.78) 0%, rgba(18, 16, 14, 0.46) 46%, rgba(18, 16, 14, 0.28) 100%),
        linear-gradient(180deg, rgba(18, 16, 14, 0.28) 0%, rgba(18, 16, 14, 0.18) 40%, rgba(18, 16, 14, 0.72) 100%);
    }
    .hero-progress {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      z-index: 3;
      background: rgba(255, 253, 249, 0.18);
    }
    .hero-progress span {
      display: block;
      height: 100%;
      width: 0;
      background: var(--copper);
    }
    .hero-progress.is-run span { animation: loadbar 6.4s linear forwards; }
    @keyframes loadbar { from { width: 0; } to { width: 100%; } }
    .hero-copy {
      position: relative;
      z-index: 2;
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
      padding: 92px 0 210px;
    }
    .brand-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 18px;
      color: var(--copper-soft);
      letter-spacing: 0.18em;
      font-size: 13px;
    }
    .hero h1, .slide-title {
      font-size: clamp(40px, 5.6vw, 72px);
      line-height: 1.12;
      font-weight: 730;
      letter-spacing: 0.02em;
      max-width: 16ch;
    }
    .hero h1 span, .slide-title span { display: block; }
    .hero-sub {
      margin-top: 16px;
      font-size: 18px;
      color: rgba(255, 253, 249, 0.86);
      max-width: 28ch;
    }
    .hero-lead {
      margin-top: 22px;
      max-width: 52ch;
      color: rgba(255, 253, 249, 0.8);
      font-size: 15px;
    }
    .hero-tags {
      display: flex;
      gap: 8px;
      margin-top: 22px;
      flex-wrap: wrap;
    }
    .hero-tags span {
      border: 1px solid rgba(255, 253, 249, 0.28);
      background: rgba(22, 20, 18, 0.28);
      color: var(--white);
      min-height: 32px;
      padding: 0 12px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      font-size: 12px;
    }
    .hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
    .hero-pager {
      position: absolute;
      left: max(20px, calc((100% - var(--container)) / 2));
      bottom: 132px;
      z-index: 3;
      font-variant-numeric: tabular-nums;
      font-family: var(--num);
      letter-spacing: 0.16em;
      font-size: 13px;
      color: rgba(255, 253, 249, 0.8);
    }
    .invite-bar {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 4;
      background: rgba(22, 20, 18, 0.82);
      border-top: 1px solid rgba(232, 194, 168, 0.22);
      backdrop-filter: blur(8px);
    }
    .invite-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr auto;
      gap: 24px;
      align-items: center;
      padding: 18px 0;
    }
    .invite-label { font-size: 12px; letter-spacing: 0.16em; color: var(--copper-soft); }
    .invite-title { font-size: 16px; margin-top: 4px; }
    .invite-desc { font-size: 13px; color: rgba(255, 253, 249, 0.72); margin-top: 4px; }
    .invite-meter { height: 6px; background: rgba(255,253,249,0.12); border-radius: 99px; overflow: hidden; margin-top: 8px; }
    .invite-meter span { display: block; height: 100%; width: 60%; background: linear-gradient(90deg, var(--copper), #e08a4e); }
    .invite-meta { font-size: 12px; color: rgba(255,253,249,0.66); margin-top: 6px; font-variant-numeric: tabular-nums; }
    .invite-actions { display: flex; gap: 10px; }
    section { padding: 120px 0; }
    .sec-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--copper-deep);
      letter-spacing: 0.18em;
      font-size: 12px;
      margin-bottom: 14px;
    }
    .sec-kicker::before {
      content: "";
      width: 18px;
      height: 1px;
      background: var(--copper);
    }
    .sec-title {
      font-size: clamp(32px, 4vw, 48px);
      line-height: 1.18;
      font-weight: 730;
      letter-spacing: 0.01em;
      max-width: 16ch;
    }
    .sec-desc {
      margin-top: 18px;
      max-width: 62ch;
      color: var(--muted);
      font-size: 16px;
    }
    .problem { background: var(--salt); }
    .problem-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 64px;
      align-items: end;
    }
    .issue-list { display: flex; flex-direction: column; }
    .issue-row {
      display: grid;
      grid-template-columns: 72px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 22px 0;
      border-top: 1px solid var(--line);
    }
    .issue-row:last-child { border-bottom: 1px solid var(--line); }
    .issue-no {
      font-family: var(--num);
      font-size: 28px;
      color: var(--copper);
      letter-spacing: 0.08em;
    }
    .issue-row h3 { font-size: 22px; }
    .issue-row p { color: var(--muted); font-size: 14px; max-width: 42ch; }
    .solution { background: var(--warm); }
    .split {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 48px;
      align-items: center;
    }
    .media-frame {
      position: relative;
      border-radius: 18px;
      overflow: hidden;
      min-height: 520px;
      box-shadow: var(--shadow);
    }
    .media-frame img { width: 100%; height: 100%; object-fit: cover; min-height: 520px; }
    .media-caption {
      position: absolute;
      left: 16px;
      bottom: 16px;
      background: rgba(22,20,18,0.72);
      color: var(--white);
      padding: 8px 12px;
      border-radius: 8px;
      font-size: 12px;
    }
    .verify-box {
      margin-top: 22px;
      border: 1px solid var(--line-strong);
      background: var(--paper);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .verify-head {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 14px 16px;
      background: #f1ebe2;
      font-size: 13px;
    }
    .param-table { width: 100%; border-collapse: collapse; }
    .param-table th, .param-table td {
      text-align: left;
      padding: 13px 16px;
      border-top: 1px solid var(--line);
      font-size: 14px;
      vertical-align: top;
    }
    .param-table th {
      width: 34%;
      color: var(--muted);
      font-weight: 500;
    }
    .note { margin-top: 12px; font-size: 12px; color: var(--muted); }
    .advantage { background: var(--paper); }
    .card-grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 48px;
    }
    .adv-card {
      background: #f7f2ea;
      border: 1px solid #e6dfd4;
      border-radius: 16px;
      padding: 22px 22px 20px;
      min-height: 230px;
      transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease), transform 220ms var(--ease);
    }
    .adv-card:hover {
      border-color: #c9b8a6;
      box-shadow: var(--shadow);
      transform: translateY(-4px);
    }
    .adv-top { display: flex; justify-content: space-between; align-items: flex-start; }
    .adv-no { font-family: var(--num); color: var(--copper); letter-spacing: 0.12em; font-size: 13px; }
    .adv-icon {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: #efe0d3;
      display: grid;
      place-items: center;
      transition: transform 220ms var(--ease);
    }
    .adv-card:hover .adv-icon { transform: translateY(-3px); }
    .adv-card h3 { margin: 28px 0 10px; font-size: 22px; }
    .adv-card p { color: var(--muted); font-size: 14px; min-height: 48px; }
    .adv-card .tag { margin-top: 16px; }
    .products { background: var(--salt); }
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
      margin-top: 48px;
    }
    .product-card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }
    .product-media {
      aspect-ratio: 4 / 3;
      overflow: hidden;
      background: var(--mineral);
    }
    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 400ms var(--ease);
    }
    .product-card:hover .product-media img { transform: scale(1.05); }
    .product-body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
    .product-body h3 {
      font-size: 22px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .spec-list { display: grid; gap: 8px; }
    .spec-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      font-size: 14px;
      border-bottom: 1px dashed var(--line);
      padding-bottom: 7px;
      color: var(--muted);
    }
    .spec-list b { color: var(--ink); font-weight: 600; }
    .process { background: var(--paper); }
    .demo-track {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin: 42px 0 56px;
    }
    .demo-item {
      position: relative;
      overflow: hidden;
      border-radius: 16px;
      min-height: 240px;
    }
    .demo-item img { width: 100%; height: 240px; object-fit: cover; }
    .demo-item figcaption {
      position: absolute;
      left: 0; right: 0; bottom: 0;
      padding: 16px;
      background: linear-gradient(180deg, transparent, rgba(16,14,12,0.78));
      color: var(--white);
    }
    .demo-item strong { display: block; font-size: 16px; }
    .demo-item span { font-size: 13px; color: rgba(255,253,249,0.78); }
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }
    .steps::before {
      content: "";
      position: absolute;
      top: 28px;
      left: 8%;
      right: 8%;
      height: 1px;
      background: var(--line-strong);
    }
    .step { position: relative; padding-top: 8px; }
    .step-no {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      border: 1px solid var(--copper);
      background: var(--paper);
      display: grid;
      place-items: center;
      font-family: var(--num);
      font-size: 22px;
      color: var(--copper-deep);
      position: relative;
      z-index: 1;
    }
    .step-dot {
      width: 8px;
      height: 8px;
      background: var(--copper);
      border-radius: 50%;
      margin: 12px 0 14px 24px;
    }
    .step h3 { font-size: 20px; margin-bottom: 8px; }
    .step p { color: var(--muted); font-size: 14px; max-width: 28ch; }
    .cases {
      background: #141210;
      color: var(--white);
      position: relative;
      overflow: hidden;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 48px;
      align-items: center;
    }
    .case-fields { display: grid; gap: 14px; margin-top: 28px; }
    .case-fields div {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255,253,249,0.12);
      font-size: 14px;
    }
    .case-fields dt { color: rgba(255,253,249,0.5); }
    .case-visual {
      position: relative;
      min-height: 460px;
      border-radius: 18px;
      overflow: hidden;
    }
    .case-visual img { width: 100%; height: 460px; object-fit: cover; filter: saturate(0.72) contrast(1.05); }
    .case-visual::after {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 28px 28px;
      mix-blend-mode: overlay;
    }
    .grain {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background-image: radial-gradient(rgba(255,255,255,0.08) 0.6px, transparent 0.6px);
      background-size: 3px 3px;
      opacity: 0.35;
    }
    .stories { background: var(--salt); }
    .story-wrap { display: grid; gap: 28px; margin-top: 42px; }
    .story {
      display: grid;
      grid-template-columns: 160px 1fr;
      gap: 28px;
      padding: 28px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 16px;
    }
    .story:nth-child(even) { margin-left: 8%; }
    .story:nth-child(odd) { margin-right: 8%; }
    .avatar {
      width: 88px;
      height: 88px;
      border-radius: 50%;
      background: linear-gradient(140deg, #d7c4b0, #8d7b6a);
      position: relative;
    }
    .avatar::after {
      content: "";
      position: absolute;
      inset: 18px 24px 12px;
      background: #2c2622;
      border-radius: 40% 40% 46% 46%;
    }
    .avatar::before {
      content: "";
      position: absolute;
      width: 28px;
      height: 22px;
      left: 30px;
      top: 18px;
      background: #2c2622;
      border-radius: 50%;
    }
    .story blockquote { font-size: 20px; line-height: 1.6; }
    .meta-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-top: 18px;
    }
    .meta-grid span { display: block; color: var(--muted); font-size: 12px; }
    .meta-grid b { font-size: 13px; font-weight: 600; }
    .scenarios { background: var(--paper); }
    .scene-bento {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr;
      grid-template-rows: 260px 220px;
      gap: 16px;
      margin-top: 42px;
    }
    .scene {
      position: relative;
      overflow: hidden;
      border-radius: 16px;
      color: var(--white);
      min-height: 180px;
    }
    .scene img { width: 100%; height: 100%; object-fit: cover; }
    .scene:nth-child(1) { grid-row: 1 / 3; }
    .scene-shade {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(16,14,12,0.1), rgba(16,14,12,0.78));
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }
    .scene h3 { font-size: 24px; margin-bottom: 6px; }
    .scene p { font-size: 13px; color: rgba(255,253,249,0.78); }
    .scene a { margin-top: 12px; color: var(--copper-soft); font-size: 13px; min-height: 44px; display: inline-flex; align-items: center; }
    .metrics {
      padding: 64px 0;
      background:
        repeating-linear-gradient(90deg, rgba(22,20,18,0.04) 0 1px, transparent 1px 32px),
        #f3eee6;
    }
    .metric-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .metric {
      text-align: left;
      padding: 8px 8px 8px 18px;
      border-left: 2px solid var(--copper);
    }
    .metric b {
      display: block;
      font-size: 42px;
      line-height: 1.1;
      font-family: var(--num);
      font-weight: 700;
    }
    .metric span { color: var(--muted); font-size: 13px; }
    .reviews { background: var(--warm); }
    .review-layout {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr;
      gap: 18px;
      margin-top: 42px;
    }
    .review-stack { display: grid; gap: 18px; }
    .quote-card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 28px;
    }
    .quote-mark { font-size: 54px; line-height: 0.6; color: var(--copper); font-family: var(--num); }
    .quote-card p { font-size: 20px; margin: 12px 0 18px; }
    .quote-foot {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      border-top: 1px solid var(--line);
      padding-top: 14px;
      color: var(--muted);
      font-size: 13px;
    }
    .review-side {
      background: var(--ink);
      color: var(--white);
      border-radius: 16px;
      padding: 28px;
    }
    .review-side li {
      padding: 14px 0;
      border-bottom: 1px solid rgba(255,253,249,0.12);
      font-size: 14px;
      color: rgba(255,253,249,0.78);
    }
    .insights { background: var(--paper); }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 42px;
    }
    .news-card {
      border: 1px solid var(--line);
      border-radius: 16px;
      overflow: hidden;
      background: var(--white);
    }
    .news-card img { width: 100%; height: 180px; object-fit: cover; }
    .news-card .body { padding: 18px; }
    .news-card time, .news-type { font-size: 12px; color: var(--muted); }
    .news-card h3 {
      margin: 8px 0;
      font-size: 20px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .news-card p {
      color: var(--muted);
      font-size: 14px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .more-news { display: none; margin-top: 18px; }
    .more-news.is-open { display: grid; gap: 12px; }
    .docs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      margin-top: 48px;
      padding-top: 28px;
      border-top: 1px solid var(--line);
    }
    .index-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px solid var(--line);
      font-size: 15px;
    }
    .index-list a { min-height: 44px; display: inline-flex; align-items: center; }
    .faq { background: var(--salt); }
    .faq-list { margin-top: 36px; display: grid; gap: 10px; }
    .faq-item { border: 1px solid var(--line); border-radius: 14px; background: var(--white); overflow: hidden; }
    .faq-item button {
      width: 100%;
      text-align: left;
      min-height: 64px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      font-size: 17px;
      font-weight: 650;
    }
    .faq-item button span {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid var(--line-strong);
      display: grid;
      place-items: center;
      flex: none;
    }
    .faq-panel {
      display: none;
      padding: 0 20px 20px;
      color: var(--muted);
      font-size: 15px;
    }
    .faq-item.is-open .faq-panel { display: block; }
    .contact { background: #ebe4d8; }
    .coupon-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin: 36px 0 28px;
    }
    .coupon {
      background: var(--white);
      border-radius: 16px;
      border: 1px dashed #c7b49d;
      padding: 20px;
      position: relative;
      box-shadow: var(--shadow);
    }
    .coupon::before, .coupon::after {
      content: "";
      position: absolute;
      width: 22px;
      height: 22px;
      background: #ebe4d8;
      border-radius: 50%;
      top: 58%;
    }
    .coupon::before { left: -11px; }
    .coupon::after { right: -11px; }
    .coupon-stub {
      border-bottom: 1px dashed var(--line);
      padding-bottom: 12px;
      margin-bottom: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .stamp {
      border: 1px solid var(--copper);
      color: var(--copper-deep);
      padding: 4px 8px;
      font-size: 12px;
      transform: rotate(-8deg);
    }
    .rules {
      font-size: 13px;
      color: var(--muted);
      display: grid;
      gap: 6px;
      margin-bottom: 48px;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 36px;
    }
    .contact-list { margin-top: 22px; display: grid; gap: 10px; }
    .contact-list a, .contact-list span { display: block; font-size: 15px; }
    .form {
      background: var(--white);
      border-radius: 16px;
      padding: 24px;
      border: 1px solid var(--line);
    }
    .form-grid { display: grid; gap: 14px; }
    label { font-size: 13px; color: var(--ash); display: grid; gap: 6px; }
    .req { color: var(--copper-deep); }
    input, select, textarea {
      min-height: 48px;
      border: 1px solid var(--line-strong);
      border-radius: 10px;
      padding: 0 14px;
      background: #fffcf8;
      font-size: 15px;
      color: var(--ink);
    }
    textarea { min-height: 96px; padding-top: 12px; resize: vertical; }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--copper);
      box-shadow: 0 0 0 4px rgba(196, 91, 39, 0.15);
    }
    .field-error { color: var(--danger); font-size: 12px; min-height: 16px; }
    .is-invalid input, .is-invalid select, .is-invalid textarea { border-color: var(--danger); }
    .form-msg {
      display: none;
      margin-top: 12px;
      padding: 12px 14px;
      border-radius: 10px;
      font-size: 14px;
    }
    .form-msg.is-error { display: block; background: #f8e8e3; color: var(--danger); }
    .form-msg.is-ok { display: block; background: #e5eee6; color: var(--ok); }
    .privacy { margin-top: 10px; font-size: 12px; color: var(--muted); }
    .site-footer {
      background: #12100e;
      color: rgba(255,253,249,0.78);
      padding: 64px 0 28px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 32px;
      padding-bottom: 36px;
      border-bottom: 1px solid rgba(255,253,249,0.08);
    }
    .site-footer h2, .site-footer h3 { color: var(--white); font-size: 18px; margin-bottom: 14px; }
    .site-footer a { display: inline-flex; min-height: 36px; align-items: center; }
    .site-footer a:hover { color: var(--copper-soft); }
    .copy {
      padding-top: 18px;
      font-size: 12px;
      color: rgba(255,253,249,0.46);
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }
    @media (max-width: 1200px) {
      .hero h1, .slide-title { font-size: 56px; }
      .scene-bento { grid-template-columns: 1.1fr 1fr 1fr; }
    }
    @media (max-width: 992px) {
      .nav-toggle { display: inline-flex; }
      .nav-panel {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(86vw, 360px);
        background: #fbf8f3;
        box-shadow: -18px 0 40px rgba(20,16,12,0.18);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: 18px;
        gap: 18px;
        transform: translateX(110%);
        transition: transform 280ms var(--ease);
        z-index: var(--z-drawer);
      }
      .nav-panel.is-open { transform: translateX(0); }
      .nav-close { display: inline-flex; align-self: flex-end; }
      .nav-list { flex-direction: column; align-items: stretch; }
      .nav-list a { justify-content: space-between; padding: 0 8px; font-size: 16px; }
      .nav-list a::after { left: 8px; right: auto; width: 24px; bottom: 6px; }
      .nav-panel .btn { width: 100%; }
      .split, .cases-grid, .contact-grid { grid-template-columns: 1fr; }
      .problem-grid { grid-template-columns: 1fr; gap: 36px; }
      .card-grid-6 { grid-template-columns: repeat(2, 1fr); }
      .scene-bento { grid-template-columns: 1fr 1fr; grid-template-rows: 240px 220px 220px; }
      .scene:nth-child(1) { grid-row: 1 / 3; }
      .scene:nth-child(4) { grid-column: 1 / 3; }
      .hero-copy { padding-top: 82px; }
    }
    @media (max-width: 768px) {
      :root { --info-h: auto; --nav-h: 70px; }
      body { font-size: 15px; }
      section { padding: 76px 0; }
      .container, .navbar, .hero-copy { width: min(100% - 32px, var(--container)); }
      .infobar { padding: 7px 16px; }
      .infobar-right { display: none; }
      .logo-name { font-size: 18px; }
      .hero { min-height: 560px; }
      .hero-copy { padding-bottom: 178px; }
      .hero h1, .slide-title { font-size: clamp(36px, 10vw, 44px); max-width: 11ch; }
      .hero-lead { font-size: 14px; max-width: 38ch; }
      .hero-sub { font-size: 16px; }
      .hero-pager { bottom: 125px; left: 16px; }
      .invite-grid { grid-template-columns: 1fr; gap: 10px; padding: 14px 0; }
      .invite-actions { display: none; }
      .media-frame, .media-frame img { min-height: 360px; }
      .card-grid-6, .product-grid, .demo-track, .news-grid { grid-template-columns: 1fr; }
      .adv-card { min-height: auto; }
      .steps { grid-template-columns: 1fr; gap: 0; }
      .steps::before { top: 24px; left: 27px; right: auto; bottom: 20px; width: 1px; height: auto; }
      .step { display: grid; grid-template-columns: 72px 1fr; padding-bottom: 24px; }
      .step-no { grid-row: span 3; }
      .step-dot { display: none; }
      .step h3 { padding-top: 12px; }
      .step p { grid-column: 2; }
      .case-visual, .case-visual img { min-height: 330px; height: 330px; }
      .story, .story:nth-child(even), .story:nth-child(odd) { grid-template-columns: 1fr; margin-left: 0; margin-right: 0; gap: 16px; }
      .meta-grid { grid-template-columns: 1fr 1fr; }
      .scene-bento { grid-template-columns: 1fr; grid-template-rows: repeat(4, 260px); }
      .scene:nth-child(1), .scene:nth-child(4) { grid-row: auto; grid-column: auto; }
      .metric-row { grid-template-columns: 1fr 1fr; gap: 24px 12px; }
      .metric b { font-size: 34px; }
      .review-layout, .docs { grid-template-columns: 1fr; }
      .coupon-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 22px; }
    }
    @media (max-width: 576px) {
      .issue-row { grid-template-columns: 48px 1fr; gap: 12px; }
      .issue-row .tag { display: none; }
      .issue-no { font-size: 22px; }
      .issue-row h3 { font-size: 19px; }
      .sec-title { font-size: 32px; }
      .quote-card p { font-size: 18px; }
      .faq-item button { padding: 16px; font-size: 16px; }
      .faq-panel { padding: 0 16px 18px; }
    }
    @media (max-width: 375px) {
      .navbar, .hero-copy, .container { width: min(100% - 24px, var(--container)); }
      .logo-mark { font-size: 10px; }
      .logo-name { font-size: 16px; }
      .hero-tags span { font-size: 11px; padding: 0 9px; }
      .btn { padding: 0 15px; }
      .metric b { font-size: 30px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
      .hero-progress.is-run span { animation: none; width: 100%; }
    }