/* roulang page: index */
:root {
      --walnut: #4A3124;
      --walnut-ink: #2F1E16;
      --sand: #E6D5BE;
      --mist: #9A9188;
      --cream: #F6F1EA;
      --paper: #FCFAF6;
      --char: #16110E;
      --brass: #A68452;
      --ink: #1C1612;
      --muted: #6B625A;
      --line: rgba(74, 49, 36, 0.14);
      --line-strong: rgba(74, 49, 36, 0.28);
      --warm-shadow: 0 10px 30px rgba(28, 22, 18, 0.08);
      --soft-shadow: 0 6px 18px rgba(28, 22, 18, 0.06);
      --radius-card: 6px;
      --radius-btn: 2px;
      --space-xs: 8px;
      --space-sm: 16px;
      --space-md: 24px;
      --space-lg: 40px;
      --space-xl: 72px;
      --space-2xl: 96px;
      --nav-top: 38px;
      --nav-main: 68px;
      --container: 1440px;
      --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
      --fast: 180ms;
      --med: 300ms;
      --slow: 700ms;
      --display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(var(--nav-main) + 12px);
    }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--cream);
      letter-spacing: 0.01em;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; border: 0; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    h1, h2, h3, h4, p { margin: 0; }
    :focus { outline: none; }
    :focus-visible {
      outline: 2px solid var(--brass);
      outline-offset: 3px;
    }
    .container {
      width: min(var(--container), calc(100% - 96px));
      margin: 0 auto;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--brass);
      font-size: 13px;
      letter-spacing: 0.18em;
      text-transform: none;
    }
    .eyebrow::before {
      content: "";
      width: 28px;
      height: 1px;
      background: var(--brass);
    }
    .section-head { margin-bottom: 40px; max-width: 42em; }
    .section-head h2,
    .h2 {
      font-family: var(--display);
      font-weight: 600;
      font-size: clamp(26px, 3vw, 40px);
      line-height: 1.28;
      letter-spacing: -0.02em;
      color: var(--ink);
    }
    .h-idx {
      display: inline-block;
      margin-right: 12px;
      color: var(--brass);
      font-family: var(--display);
      font-size: 0.62em;
      letter-spacing: 0.08em;
      transform: translateY(-0.08em);
    }
    .lead {
      margin-top: 16px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.85;
      max-width: 42em;
    }
    .prose { max-width: 42em; }
    .prose p + p { margin-top: 18px; }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border: 1px solid rgba(166, 132, 82, 0.45);
      color: var(--brass);
      font-size: 12px;
      letter-spacing: 0.08em;
      border-radius: 2px;
      background: rgba(166, 132, 82, 0.08);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 22px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      letter-spacing: 0.06em;
      transition: background var(--med) var(--ease), color var(--med) var(--ease), border-color var(--med) var(--ease), transform var(--fast);
    }
    .btn-solid {
      background: var(--walnut);
      color: #F8F1E7;
      border: 1px solid var(--walnut);
    }
    .btn-solid:hover { background: var(--walnut-ink); border-color: var(--walnut-ink); }
    .btn-solid:active { transform: translateY(1px); }
    .btn-ghost {
      background: transparent;
      color: #F4EDE3;
      border: 1px solid rgba(244, 237, 227, 0.45);
    }
    .btn-ghost:hover { border-color: var(--brass); color: #fff; }
    .btn-line {
      background: transparent;
      color: var(--walnut);
      border: 1px solid var(--line-strong);
    }
    .btn-line:hover {
      border-color: var(--brass);
      color: var(--walnut-ink);
    }
    .btn-brass {
      background: transparent;
      color: var(--sand);
      border: 1px solid var(--brass);
    }
    .btn-brass:hover { background: rgba(166, 132, 82, 0.16); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      background: rgba(246, 241, 234, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: box-shadow var(--med), background var(--med);
    }
    .site-header.is-stuck {
      box-shadow: 0 8px 24px rgba(22, 17, 14, 0.06);
      border-bottom-color: var(--line);
    }
    .header-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: var(--nav-top);
      padding: 0 max(24px, calc((100% - var(--container)) / 2));
      background: #EFE6D8;
      color: var(--muted);
      font-size: 12.5px;
      letter-spacing: 0.04em;
      overflow: hidden;
      transition: max-height var(--med), padding var(--med), opacity var(--med);
      max-height: 48px;
    }
    .site-header.is-stuck .header-top {
      max-height: 0;
      padding-top: 0;
      padding-bottom: 0;
      opacity: 0;
      pointer-events: none;
    }
    .header-top a { color: var(--walnut); }
    .header-top a:hover { color: var(--brass); }
    .top-left, .top-right { display: flex; align-items: center; gap: 18px; white-space: nowrap; }
    .dot-sep::before {
      content: "";
      width: 3px;
      height: 3px;
      border-radius: 50%;
      background: var(--mist);
      display: inline-block;
      margin-right: 18px;
      transform: translateY(-1px);
    }
    .top-link {
      min-height: 28px;
      display: inline-flex;
      align-items: center;
      border-bottom: 1px solid transparent;
    }
    .top-link:hover { border-bottom-color: var(--brass); }
    .header-main {
      display: flex;
      align-items: center;
      gap: 28px;
      min-height: var(--nav-main);
      padding: 0 max(24px, calc((100% - var(--container)) / 2));
    }
    .logo {
      font-family: var(--display);
      font-size: 20px;
      font-weight: 600;
      color: var(--walnut);
      letter-spacing: 0.04em;
      white-space: nowrap;
      flex: 0 0 auto;
    }
    .logo span { color: var(--brass); padding: 0 4px; }
    .nav-desktop {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 2px;
      flex: 1;
    }
    .nav-desktop a {
      position: relative;
      padding: 10px 12px;
      font-size: 14px;
      color: var(--ink);
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }
    .nav-desktop a::after {
      content: "";
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 8px;
      height: 1px;
      background: var(--brass);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform var(--med) var(--ease);
    }
    .nav-desktop a:hover::after,
    .nav-desktop a.is-active::after { transform: scaleX(1); }
    .header-cta { flex: 0 0 auto; }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      margin-left: auto;
      position: relative;
    }
    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      position: absolute;
      left: 12px;
      width: 20px;
      height: 1.5px;
      background: var(--walnut);
      transition: transform var(--med), opacity var(--fast);
    }
    .menu-toggle span { top: 21px; }
    .menu-toggle span::before { content: ""; top: -6px; }
    .menu-toggle span::after { content: ""; top: 6px; }
    .menu-toggle.is-open span { background: transparent; }
    .menu-toggle.is-open span::before { top: 0; transform: rotate(45deg); }
    .menu-toggle.is-open span::after { top: 0; transform: rotate(-45deg); }
    .drawer-mask {
      position: fixed;
      inset: 0;
      background: rgba(22, 17, 14, 0.42);
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--med);
      z-index: 90;
    }
    .drawer-mask.is-open { opacity: 1; pointer-events: auto; }
    .drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      width: min(86vw, 400px);
      background: var(--paper);
      z-index: 100;
      transform: translateX(100%);
      transition: transform 380ms var(--ease);
      padding: 28px 28px 40px;
      display: flex;
      flex-direction: column;
      gap: 18px;
      overflow: auto;
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer-brand {
      font-family: var(--display);
      font-size: 22px;
      color: var(--walnut);
      padding-right: 48px;
    }
    .drawer nav { display: flex; flex-direction: column; margin-top: 12px; }
    .drawer nav a {
      min-height: 48px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--line);
      font-size: 16px;
    }
    .drawer-meta {
      margin-top: auto;
      font-size: 13px;
      color: var(--muted);
      line-height: 1.8;
    }
    .hero {
      position: relative;
      height: min(92vh, 820px);
      min-height: 560px;
      overflow: hidden;
      background: var(--char);
      color: #F7F0E6;
    }
    .slides { position: absolute; inset: 0; }
    .slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity var(--slow) ease;
      pointer-events: none;
    }
    .slide.is-active { opacity: 1; pointer-events: auto; z-index: 1; }
    .slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transform: scale(1.04);
      filter: saturate(0.86) contrast(1.05);
    }
    .slide.is-active img { animation: kenburns 9s ease-out forwards; }
    @keyframes kenburns {
      from { transform: scale(1.04) translate3d(0, 0, 0); }
      to { transform: scale(1.12) translate3d(-1.5%, -1%, 0); }
    }
    .slide-shade {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(22, 17, 14, 0.72) 0%, rgba(22, 17, 14, 0.42) 46%, rgba(22, 17, 14, 0.18) 100%),
        linear-gradient(180deg, rgba(22, 17, 14, 0.18) 0%, rgba(22, 17, 14, 0.55) 100%);
    }
    .hero-copy {
      position: relative;
      z-index: 2;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 0 max(24px, calc((100% - var(--container)) / 2)) 88px;
      width: min(780px, 100%);
    }
    .brand-lock {
      font-family: var(--display);
      font-size: 15px;
      letter-spacing: 0.22em;
      color: var(--sand);
      margin-bottom: 18px;
    }
    .hero h1,
    .slide-title {
      font-family: var(--display);
      font-weight: 600;
      font-size: clamp(36px, 5.2vw, 68px);
      line-height: 1.16;
      letter-spacing: -0.03em;
      max-width: 10em;
    }
    .hero-lead {
      margin-top: 22px;
      max-width: 36em;
      color: rgba(246, 241, 234, 0.86);
      font-size: 16px;
      line-height: 1.85;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
    .hero-nav {
      position: absolute;
      z-index: 3;
      right: max(24px, calc((100% - var(--container)) / 2));
      bottom: 36px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .hero-arrow, .hero-dots button {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(230, 213, 190, 0.35);
      color: #F6F1EA;
      border-radius: 2px;
      display: grid;
      place-items: center;
      background: rgba(22, 17, 14, 0.28);
    }
    .hero-arrow:hover { border-color: var(--brass); color: var(--sand); }
    .hero-dots { display: flex; gap: 8px; }
    .hero-dots button {
      width: 10px;
      height: 10px;
      min-width: 44px;
      border: 0;
      background: transparent;
      position: relative;
    }
    .hero-dots button::after {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      border: 1px solid var(--sand);
      display: block;
      margin: 0 auto;
    }
    .hero-dots button.is-on::after { background: var(--brass); border-color: var(--brass); }
    .section { padding: var(--space-2xl) 0; }
    .section-cream { background: var(--cream); }
    .section-paper { background: var(--paper); }
    .section-sand { background: #F3E8D7; }
    .misread {
      display: grid;
      grid-template-columns: minmax(240px, 0.38fr) 1fr;
      gap: 56px;
      align-items: start;
    }
    .misread-sticky { position: sticky; top: 108px; }
    .mis-list { display: grid; gap: 0; }
    .mis-item {
      display: grid;
      grid-template-columns: 72px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 22px 0;
      border-top: 1px solid var(--line);
    }
    .mis-item:last-child { border-bottom: 1px solid var(--line); }
    .mis-no {
      font-family: var(--display);
      font-size: 28px;
      color: var(--brass);
      letter-spacing: -0.04em;
    }
    .mis-item h3 { font-size: 20px; font-family: var(--display); font-weight: 600; }
    .mis-item p { color: var(--muted); font-size: 14px; margin-top: 4px; max-width: 36em; }
    .mis-link {
      font-size: 13px;
      color: var(--walnut);
      border-bottom: 1px solid var(--brass);
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 64px;
      align-items: center;
    }
    .still-life {
      position: relative;
      min-height: 560px;
    }
    .still-life img {
      width: 100%;
      height: 620px;
      object-fit: cover;
      border-radius: 6px;
      filter: saturate(0.9);
    }
    .spec-card {
      position: absolute;
      left: -28px;
      bottom: 28px;
      width: min(340px, 86%);
      background: var(--paper);
      border: 1px solid var(--line);
      box-shadow: var(--warm-shadow);
      padding: 22px 22px 18px;
    }
    .spec-card h3 {
      font-family: var(--display);
      font-size: 18px;
      margin-bottom: 10px;
    }
    .spec-card dl { display: grid; gap: 8px; font-size: 13px; color: var(--muted); }
    .spec-card dt { color: var(--ink); }
    .check-line {
      margin-top: 22px;
      padding-top: 18px;
      border-top: 1px solid var(--line);
      font-size: 14px;
      color: var(--ink);
    }
    .timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }
    .step {
      position: relative;
      padding: 28px 24px 24px;
      background: var(--cream);
      border: 1px solid var(--line);
      border-radius: 6px;
      min-height: 240px;
    }
    .step::before {
      counter-increment: step;
      content: counter(step, decimal-leading-zero);
      font-family: var(--display);
      color: var(--brass);
      font-size: 22px;
      display: block;
      margin-bottom: 18px;
    }
    .step + .step::after {
      content: "";
      position: absolute;
      left: -24px;
      top: 42px;
      width: 24px;
      height: 1px;
      background: var(--brass);
      opacity: 0.55;
    }
    .step h3 {
      font-family: var(--display);
      font-size: 22px;
      margin-bottom: 12px;
    }
    .step p { color: var(--muted); font-size: 14px; }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      grid-auto-rows: minmax(280px, auto);
      gap: 16px;
    }
    .tile {
      position: relative;
      overflow: hidden;
      border-radius: 6px;
      background: var(--paper);
      border: 1px solid var(--line);
      min-height: 280px;
      transition: transform var(--med) var(--ease), border-color var(--med), box-shadow var(--med);
    }
    .tile:hover {
      transform: translateY(-4px);
      border-color: var(--brass);
      box-shadow: var(--soft-shadow);
    }
    .tile img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--med);
    }
    .tile:hover img { transform: scale(1.04); }
    .tile-body { padding: 22px 22px 24px; }
    .tile-no {
      font-family: var(--display);
      font-size: 34px;
      color: var(--brass);
      letter-spacing: -0.04em;
      line-height: 1;
    }
    .tile h3 {
      font-family: var(--display);
      font-size: 22px;
      margin: 10px 0 8px;
    }
    .tile p { color: var(--muted); font-size: 14px; }
    .tile--photo .tile-media { height: 150px; overflow: hidden; }
    .tile--photo .tile-media img { height: 150px; }
    .tile--overlay {
      color: #F6F1EA;
      display: flex;
      align-items: flex-end;
    }
    .tile--overlay img { position: absolute; inset: 0; height: 100%; }
    .tile--overlay .tile-body {
      position: relative;
      z-index: 1;
      background: linear-gradient(180deg, transparent, rgba(22, 17, 14, 0.78));
      width: 100%;
    }
    .tile--overlay p { color: rgba(246, 241, 234, 0.82); }
    .tile--split { display: grid; grid-template-columns: 0.9fr 1.1fr; }
    .tile--split .tile-media { min-height: 100%; overflow: hidden; }
    .tile--split img { height: 100%; }
    .tile--num { padding: 26px; display: flex; flex-direction: column; justify-content: space-between; }
    .tile--num .tile-no { font-size: 64px; opacity: 0.88; }
    .tile--bottom { display: flex; flex-direction: column; }
    .tile--bottom .tile-media { order: 2; height: 160px; overflow: hidden; }
    .tile--bottom img { height: 160px; }
    .product-stage {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      grid-template-rows: 1fr 1fr;
      gap: 16px;
      min-height: 720px;
    }
    .product {
      position: relative;
      overflow: hidden;
      border-radius: 6px;
      border: 1px solid var(--line);
      background: var(--char);
      color: #F6F1EA;
      min-height: 280px;
      transition: border-color var(--med), transform var(--med);
    }
    .product:hover { border-color: var(--brass); transform: translateY(-4px); }
    .product.is-large { grid-row: 1 / span 2; min-height: 720px; }
    .product img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.78;
      transition: transform var(--med);
    }
    .product:hover img { transform: scale(1.04); }
    .product-body {
      position: relative;
      z-index: 1;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 28px;
      background: linear-gradient(180deg, rgba(22, 17, 14, 0.05), rgba(22, 17, 14, 0.72));
    }
    .product h3 {
      font-family: var(--display);
      font-size: 28px;
      margin: 8px 0 10px;
    }
    .product .meta { font-size: 14px; color: rgba(246, 241, 234, 0.82); }
    .product .btn { align-self: flex-start; margin-top: 18px; }
    .material-band {
      position: relative;
      min-height: 360px;
      overflow: hidden;
      border-radius: 6px;
    }
    .material-band img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      filter: saturate(0.88);
    }
    .material-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      margin-top: 40px;
    }
    .note h3 {
      font-family: var(--display);
      font-size: 24px;
      margin: 10px 0 12px;
    }
    .note p { color: var(--muted); }
    .swatches { display: flex; gap: 10px; margin-top: 18px; }
    .swatch {
      width: 44px;
      height: 44px;
      border-radius: 2px;
      border: 1px solid rgba(74, 49, 36, 0.2);
    }
    .s1 { background: #C7A27A; }
    .s2 { background: #8B5A3C; }
    .s3 { background: #5C3B2A; }
    .s4 { background: #D9C3A1; }
    .s5 { background: #3E2A22; }
    .dark-case {
      position: relative;
      background: var(--char);
      color: #F3EBE1;
      padding: 120px 0;
      overflow: hidden;
    }
    .dark-case::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url("/assets/images/eb70fb2a011b44b3.jpg") center/cover;
      opacity: 0.08;
      mix-blend-mode: overlay;
      pointer-events: none;
    }
    .dark-layout {
      position: relative;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 64px;
      align-items: center;
    }
    .quote-xl {
      font-family: var(--display);
      font-size: clamp(28px, 3.4vw, 44px);
      line-height: 1.35;
      letter-spacing: -0.02em;
    }
    .quote-xl span { color: var(--sand); }
    .dark-copy { margin-top: 24px; color: rgba(243, 235, 225, 0.78); max-width: 36em; }
    .case-frame {
      position: relative;
      min-height: 460px;
    }
    .case-frame img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      border-radius: 4px;
      filter: saturate(0.8);
    }
    .case-caption {
      position: absolute;
      left: 20px;
      bottom: 20px;
      padding: 12px 14px;
      background: rgba(22, 17, 14, 0.62);
      border: 1px solid rgba(166, 132, 82, 0.35);
      font-size: 13px;
      letter-spacing: 0.08em;
    }
    .people {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
    }
    .person {
      background: var(--paper);
      padding: 36px 32px;
      min-height: 220px;
    }
    .person h3 {
      font-family: var(--display);
      font-size: 24px;
      margin-bottom: 12px;
    }
    .person p { color: var(--muted); }
    .person .tag {
      font-size: 12px;
      letter-spacing: 0.14em;
      color: var(--brass);
      margin-bottom: 14px;
    }
    .scenes {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      grid-template-rows: 240px 240px;
      gap: 12px;
    }
    .scene {
      position: relative;
      overflow: hidden;
      border-radius: 4px;
      display: block;
      min-height: 180px;
    }
    .scene:first-child { grid-row: 1 / span 2; }
    .scene img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--med);
    }
    .scene:hover img { transform: scale(1.04); }
    .scene span {
      position: absolute;
      left: 14px;
      bottom: 14px;
      padding: 6px 10px;
      background: rgba(22, 17, 14, 0.7);
      color: #F6F1EA;
      font-size: 13px;
      letter-spacing: 0.08em;
      border: 1px solid rgba(166, 132, 82, 0.4);
    }
    .stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      border-top: 1px solid rgba(74, 49, 36, 0.16);
      border-bottom: 1px solid rgba(74, 49, 36, 0.16);
    }
    .stat {
      padding: 36px 20px;
      text-align: left;
      border-right: 1px solid rgba(74, 49, 36, 0.12);
    }
    .stat:last-child { border-right: 0; }
    .stat b {
      display: block;
      font-family: var(--display);
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 600;
      letter-spacing: -0.03em;
      color: var(--walnut);
      line-height: 1.1;
    }
    .stat span { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; }
    .stories { display: grid; gap: 72px; }
    .story {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 48px;
      align-items: center;
    }
    .story.is-flip { grid-template-columns: 1.1fr 0.9fr; }
    .story.is-flip .story-media { order: 2; }
    .story img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      border-radius: 6px;
    }
    .story h3 {
      font-family: var(--display);
      font-size: 28px;
      margin: 10px 0 16px;
    }
    .story p { color: var(--muted); }
    .quotes {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .quote-card {
      background: var(--cream);
      border: 1px solid var(--line);
      border-radius: 6px;
      padding: 26px 24px;
      min-height: 220px;
      display: flex;
      flex-direction: column;
      transition: transform var(--med), border-color var(--med);
    }
    .quote-card:hover { transform: translateY(-4px); border-color: var(--brass); }
    .stars { color: var(--brass); letter-spacing: 2px; font-size: 13px; }
    .quote-card p { margin: 14px 0 18px; font-size: 15px; }
    .quote-card footer { margin-top: auto; font-size: 13px; color: var(--muted); }
    .news-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 16px;
    }
    .news {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform var(--med), border-color var(--med);
    }
    .news:hover { transform: translateY(-4px); border-color: var(--brass); }
    .news img { height: 180px; width: 100%; object-fit: cover; }
    .news:first-child img { height: 240px; }
    .news-body { padding: 20px 20px 22px; }
    .news h3 {
      font-family: var(--display);
      font-size: 20px;
      margin: 8px 0 10px;
    }
    .news p { color: var(--muted); font-size: 14px; }
    .more-link {
      display: inline-flex;
      margin-top: 22px;
      font-size: 14px;
      color: var(--walnut);
      border-bottom: 1px solid var(--brass);
      min-height: 44px;
      align-items: center;
    }
    .metric-wrap {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 48px;
      align-items: start;
    }
    .bars { display: grid; gap: 22px; }
    .bar-row { display: grid; gap: 8px; }
    .bar-row span { display: flex; justify-content: space-between; font-size: 14px; }
    .bar-track {
      height: 6px;
      background: rgba(74, 49, 36, 0.1);
      border-radius: 99px;
      overflow: hidden;
    }
    .bar-fill {
      height: 100%;
      background: var(--walnut);
      width: 0;
      transition: width 1.1s var(--ease);
    }
    .metric-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }
    .metric-table th, .metric-table td {
      text-align: left;
      padding: 14px 12px;
      border-bottom: 1px solid var(--line);
      vertical-align: top;
    }
    .metric-table th {
      font-weight: 500;
      color: var(--muted);
      width: 34%;
    }
    .faq-cta { padding-bottom: 0; }
    .faq-list { display: grid; gap: 10px; max-width: 920px; }
    .faq-item {
      border: 1px solid var(--line);
      background: var(--paper);
      border-radius: 6px;
      overflow: hidden;
    }
    .faq-item button {
      width: 100%;
      text-align: left;
      min-height: 56px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      font-size: 16px;
      color: var(--ink);
    }
    .faq-item button i {
      font-style: normal;
      color: var(--brass);
      font-family: var(--display);
      font-size: 22px;
      line-height: 1;
    }
    .faq-panel {
      display: none;
      padding: 0 20px 18px;
      color: var(--muted);
      max-width: 42em;
    }
    .faq-item.is-open { border-color: var(--brass); }
    .faq-item.is-open .faq-panel { display: block; }
    .cta-block {
      margin-top: 88px;
      background: var(--char);
      color: #F4EDE3;
      padding: 88px 0;
      position: relative;
    }
    .cta-block::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url("/assets/images/6e47cdd32b46de03.jpg") center/cover;
      opacity: 0.07;
      mix-blend-mode: overlay;
    }
    .cta-grid {
      position: relative;
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 56px;
      align-items: start;
    }
    .cta-title {
      font-family: var(--display);
      font-size: clamp(28px, 3vw, 42px);
      line-height: 1.25;
      letter-spacing: -0.02em;
    }
    .cta-copy { margin: 18px 0 28px; color: rgba(244, 237, 227, 0.78); max-width: 36em; }
    .hotline {
      font-family: var(--display);
      font-size: 28px;
      color: var(--sand);
    }
    .form {
      background: rgba(252, 250, 246, 0.96);
      color: var(--ink);
      padding: 28px;
      border-radius: 6px;
      border: 1px solid rgba(166, 132, 82, 0.28);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; color: var(--muted); }
    .field input, .field select, .field textarea {
      width: 100%;
      border: 1px solid var(--line-strong);
      background: #fff;
      min-height: 44px;
      padding: 10px 12px;
      border-radius: 2px;
      color: var(--ink);
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field.is-error input,
    .field.is-error select,
    .field.is-error textarea { border-color: #8A3B2A; box-shadow: inset 3px 0 0 #8A3B2A; }
    .hint { display: none; font-size: 12px; color: #8A3B2A; }
    .field.is-error .hint { display: block; }
    .form-note { margin-top: 10px; font-size: 12px; color: var(--muted); }
    .form-success {
      display: none;
      padding: 18px;
      background: #F3E8D7;
      border: 1px solid var(--brass);
      color: var(--walnut);
      margin-bottom: 14px;
      font-size: 14px;
    }
    .form-success.is-on { display: block; }
    .site-footer {
      background: #120E0C;
      color: rgba(246, 241, 234, 0.78);
      padding: 64px 0 28px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 0.9fr;
      gap: 36px;
    }
    .footer-brand {
      font-family: var(--display);
      font-size: 22px;
      color: #F6F1EA;
      margin-bottom: 12px;
    }
    .footer-grid h3 {
      font-family: var(--display);
      font-size: 16px;
      color: #F6F1EA;
      margin-bottom: 14px;
    }
    .footer-grid a { color: rgba(246, 241, 234, 0.78); }
    .footer-grid a:hover { color: var(--sand); }
    .footer-grid ul { display: grid; gap: 8px; }
    .copyright {
      margin-top: 40px;
      padding-top: 18px;
      border-top: 1px solid rgba(230, 213, 190, 0.12);
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 12px;
      color: rgba(246, 241, 234, 0.5);
    }
    @media (max-width: 1440px) {
      .container { width: min(1240px, calc(100% - 64px)); }
    }
    @media (max-width: 1024px) {
      .container { width: calc(100% - 48px); }
      .nav-desktop { display: none; }
      .header-cta { display: none; }
      .menu-toggle { display: inline-block; }
      .intro-grid, .dark-layout, .metric-wrap, .cta-grid, .misread { grid-template-columns: 1fr; gap: 32px; }
      .still-life { min-height: auto; }
      .still-life img { height: 420px; }
      .spec-card { position: relative; left: 0; bottom: 0; margin-top: -48px; width: min(100%, 420px); }
      .timeline { grid-template-columns: 1fr 1fr; }
      .step + .step::after { display: none; }
      .adv-grid { grid-template-columns: 1fr 1fr; }
      .tile--split { grid-template-columns: 1fr; }
      .product-stage { grid-template-columns: 1fr; grid-template-rows: none; min-height: 0; }
      .product.is-large { min-height: 460px; grid-row: auto; }
      .news-grid { grid-template-columns: 1fr 1fr; }
      .quotes { grid-template-columns: 1fr 1fr; }
      .scenes { grid-template-columns: 1fr 1fr; grid-template-rows: 220px 180px 180px; }
      .scene:first-child { grid-column: 1 / -1; }
      .stats { grid-template-columns: 1fr 1fr; }
      .stat:nth-child(2) { border-right: 0; }
      .story, .story.is-flip { grid-template-columns: 1fr; }
      .story.is-flip .story-media { order: 0; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .misread-sticky { position: static; }
    }
    @media (max-width: 768px) {
      .header-top {
        overflow-x: auto;
        gap: 16px;
        -webkit-overflow-scrolling: touch;
      }
      .top-right .dot-sep:nth-child(1) { display: none; }
      .hero {
        height: auto;
        min-height: 100svh;
        aspect-ratio: 3 / 4;
      }
      .hero-copy { padding-bottom: 110px; width: 100%; }
      .hero-nav { left: 20px; right: auto; }
      .section { padding: 56px 0; }
      .adv-grid, .quotes, .news-grid, .people, .material-grid, .timeline { grid-template-columns: 1fr; }
      .tile--overlay, .tile--num, .tile { min-height: 240px; }
      .stats { grid-template-columns: 1fr; }
      .stat { border-right: 0; border-bottom: 1px solid rgba(74, 49, 36, 0.12); }
      .form-grid { grid-template-columns: 1fr; }
      .mis-item { grid-template-columns: 48px 1fr; }
      .mis-link { grid-column: 2; }
      .scenes { grid-template-columns: 1fr; grid-template-rows: none; }
      .scene { height: 220px; }
      .footer-grid { grid-template-columns: 1fr; }
      .dark-case { padding: 72px 0; }
      .cta-block { padding: 64px 0; margin-top: 56px; }
    }
    @media (max-width: 520px) {
      .container { width: calc(100% - 32px); }
      .header-top { font-size: 12px; }
      .logo { font-size: 17px; }
      .hero { aspect-ratio: 4 / 5; min-height: 100svh; }
      .hero-actions .btn { width: 100%; }
      .quote-xl { font-size: 26px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation: none !important;
        transition: none !important;
      }
    }

/* roulang page: index */
:root {
      --walnut: #4A3124;
      --walnut-ink: #2F1E16;
      --sand: #E6D5BE;
      --mist: #9A9188;
      --cream: #F6F1EA;
      --paper: #FCFAF6;
      --char: #16110E;
      --brass: #A68452;
      --ink: #1C1612;
      --muted: #6B625A;
      --line: rgba(74, 49, 36, 0.14);
      --line-strong: rgba(74, 49, 36, 0.28);
      --shadow: 0 12px 32px rgba(28, 22, 18, 0.08);
      --shadow-soft: 0 8px 20px rgba(28, 22, 18, 0.06);
      --radius: 6px;
      --radius-sm: 4px;
      --btn-radius: 2px;
      --space-1: 8px;
      --space-2: 16px;
      --space-3: 24px;
      --space-4: 40px;
      --space-5: 56px;
      --space-6: 72px;
      --space-7: 96px;
      --container: 1440px;
      --header-top: 36px;
      --header-main: 72px;
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
      --dur: 300ms;
      --dur-slow: 700ms;
      --focus: 0 0 0 3px rgba(166, 132, 82, 0.45);
      --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--cream);
      letter-spacing: 0.01em;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; color: var(--ink); letter-spacing: -0.03em; line-height: 1.2; margin: 0; }
    p { margin: 0 0 1.15em; }
    p:last-child { margin-bottom: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: none; box-shadow: var(--focus); }
    .container {
      width: min(calc(100% - 48px), var(--container));
      margin: 0 auto;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      letter-spacing: 0.18em;
      text-transform: none;
      color: var(--brass);
      font-weight: 500;
    }
    .eyebrow::before {
      content: "";
      width: 28px;
      height: 1px;
      background: var(--brass);
    }
    .section-head { max-width: 42em; margin-bottom: var(--space-5); }
    .section-head h2 {
      font-size: clamp(26px, 3vw, 40px);
      margin: 14px 0 18px;
    }
    .section-kicker {
      display: flex;
      align-items: center;
      gap: 14px;
      color: var(--mist);
      font-size: 13px;
      letter-spacing: 0.12em;
    }
    .section-kicker span.num {
      font-family: var(--serif);
      color: var(--brass);
      letter-spacing: 0.08em;
    }
    .section-kicker::after {
      content: "";
      flex: 0 0 48px;
      height: 1px;
      background: var(--line-strong);
    }
    .lead {
      color: var(--muted);
      font-size: 16px;
      line-height: 1.85;
      max-width: 42em;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 22px;
      border-radius: var(--btn-radius);
      font-size: 14px;
      font-weight: 500;
      letter-spacing: 0.04em;
      transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--walnut);
      color: #F8F1E8;
      border: 1px solid var(--walnut);
    }
    .btn-primary:hover { background: var(--walnut-ink); border-color: var(--walnut-ink); }
    .btn-primary:active { transform: translateY(1px); }
    .btn-ghost {
      background: transparent;
      color: #F4EBDD;
      border: 1px solid rgba(230, 213, 190, 0.45);
    }
    .btn-ghost:hover { border-color: var(--sand); color: #fff; }
    .btn-line {
      background: transparent;
      color: var(--walnut);
      border: 1px solid var(--walnut);
    }
    .btn-line:hover { background: var(--walnut); color: #F8F1E8; }
    .btn-light {
      background: var(--sand);
      color: var(--walnut);
      border: 1px solid var(--sand);
    }
    .btn-light:hover { background: #dcc6a8; }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border: 1px solid rgba(166, 132, 82, 0.45);
      color: var(--brass);
      font-size: 12px;
      letter-spacing: 0.08em;
      border-radius: 2px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      background: rgba(246, 241, 234, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line);
      transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
    }
    .site-header.is-scrolled { box-shadow: var(--shadow-soft); }
    .header-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: var(--header-top);
      background: #efe6d8;
      border-bottom: 1px solid var(--line);
      font-size: 12.5px;
      color: var(--muted);
      overflow: hidden;
      transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), padding var(--dur) var(--ease);
      max-height: 48px;
    }
    .site-header.is-scrolled .header-top {
      max-height: 0;
      opacity: 0;
      padding-top: 0;
      padding-bottom: 0;
      border-bottom: 0;
    }
    .header-top .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: var(--header-top);
    }
    .header-top a { color: var(--walnut); }
    .header-top a:hover { color: var(--brass); }
    .top-left, .top-right {
      display: flex;
      align-items: center;
      gap: 18px;
      flex-wrap: wrap;
    }
    .top-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--brass); display: inline-block; }
    .header-main { min-height: var(--header-main); }
    .header-main .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      min-height: var(--header-main);
    }
    .logo {
      font-family: var(--serif);
      font-size: 20px;
      font-weight: 700;
      color: var(--walnut);
      letter-spacing: 0.04em;
      white-space: nowrap;
    }
    .logo small {
      display: block;
      font-family: var(--sans);
      font-size: 11px;
      font-weight: 400;
      color: var(--mist);
      letter-spacing: 0.22em;
      margin-top: 2px;
    }
    .nav-desk {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-desk a {
      position: relative;
      padding: 10px 12px;
      font-size: 14px;
      color: var(--ink);
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }
    .nav-desk a::after {
      content: "";
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 8px;
      height: 1px;
      background: var(--brass);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform var(--dur) var(--ease);
    }
    .nav-desk a:hover::after, .nav-desk a.is-active::after { transform: scaleX(1); }
    .header-cta { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      display: block;
      width: 18px;
      height: 1.5px;
      background: var(--walnut);
      transition: transform var(--dur) var(--ease), opacity var(--dur);
    }
    .drawer-mask {
      position: fixed;
      inset: 0;
      background: rgba(22, 17, 14, 0.46);
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--dur) var(--ease);
      z-index: 90;
    }
    .drawer-mask.is-open { opacity: 1; pointer-events: auto; }
    .drawer {
      position: fixed;
      top: 0;
      right: 0;
      width: min(86vw, 360px);
      height: 100%;
      background: var(--paper);
      z-index: 100;
      transform: translateX(100%);
      transition: transform var(--dur-slow) var(--ease);
      padding: 28px 24px 40px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      overflow-y: auto;
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer-close {
      align-self: flex-end;
      width: 44px;
      height: 44px;
      color: var(--walnut);
      font-size: 22px;
    }
    .drawer a {
      min-height: 48px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--line);
      font-size: 16px;
    }
    .drawer .btn { margin-top: 18px; width: 100%; }
    .hero {
      position: relative;
      min-height: calc(100vh - 108px);
      background: var(--char);
      color: #F7F0E6;
      overflow: hidden;
    }
    .slides { position: absolute; inset: 0; }
    .slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity 750ms var(--ease);
      pointer-events: none;
    }
    .slide.is-active { opacity: 1; pointer-events: auto; z-index: 1; }
    .slide-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      transform: scale(1.04);
      animation: ken 18s linear infinite;
    }
    .slide.is-active .slide-bg { animation-name: ken; }
    @keyframes ken {
      from { transform: scale(1.04) translate3d(0, 0, 0); }
      to { transform: scale(1.12) translate3d(-1.4%, -1%, 0); }
    }
    .slide-shade {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(22, 17, 14, 0.78) 0%, rgba(22, 17, 14, 0.42) 46%, rgba(22, 17, 14, 0.18) 100%),
        linear-gradient(180deg, rgba(22, 17, 14, 0.18), rgba(22, 17, 14, 0.55));
    }
    .hero-copy {
      position: relative;
      z-index: 2;
      min-height: calc(100vh - 108px);
      display: flex;
      align-items: center;
      padding: 72px 0 96px;
    }
    .brand-lock {
      font-family: var(--serif);
      font-size: 15px;
      letter-spacing: 0.22em;
      color: var(--sand);
      margin-bottom: 18px;
    }
    .hero h1 {
      color: #FCFAF6;
      font-size: clamp(36px, 5.4vw, 68px);
      max-width: 14em;
      margin-bottom: 22px;
    }
    .hero .lead { color: rgba(246, 241, 234, 0.82); font-size: 16px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
    .hero-ctrl {
      position: absolute;
      z-index: 3;
      bottom: 28px;
      left: 0;
      right: 0;
    }
    .hero-ctrl .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .dots { display: flex; gap: 8px; }
    .dot {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
    }
    .dot i {
      width: 22px;
      height: 2px;
      background: rgba(246, 241, 234, 0.35);
      display: block;
      transition: background var(--dur), width var(--dur);
    }
    .dot.is-active i { background: var(--sand); width: 32px; }
    .arrows { display: flex; gap: 8px; }
    .arrow {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(230, 213, 190, 0.4);
      color: #F6F1EA;
      display: grid;
      place-items: center;
      border-radius: 2px;
    }
    .arrow:hover { border-color: var(--sand); background: rgba(246, 241, 234, 0.08); }
    .misconceptions {
      padding: var(--space-7) 0;
      background: var(--paper);
    }
    .mis-grid {
      display: grid;
      grid-template-columns: 1.1fr 1.4fr;
      gap: 56px;
      align-items: start;
    }
    .mis-list { display: grid; gap: 0; }
    .mis-item {
      display: grid;
      grid-template-columns: 72px 1fr auto;
      gap: 16px;
      align-items: center;
      padding: 22px 0;
      border-top: 1px solid var(--line);
    }
    .mis-item:last-child { border-bottom: 1px solid var(--line); }
    .mis-item .idx {
      font-family: var(--serif);
      font-size: 22px;
      color: var(--brass);
    }
    .mis-item h3 { font-size: 20px; margin-bottom: 6px; }
    .mis-item p { color: var(--muted); font-size: 14px; }
    .mis-item a {
      font-size: 13px;
      color: var(--walnut);
      border-bottom: 1px solid var(--brass);
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }
    .solution {
      padding: var(--space-7) 0;
      background: var(--cream);
    }
    .split {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 64px;
      align-items: center;
    }
    .spec-box {
      margin-top: 28px;
      padding: 22px 24px;
      border: 1px solid var(--line);
      background: var(--paper);
      display: grid;
      gap: 10px;
    }
    .spec-box dt {
      font-size: 13px;
      color: var(--mist);
      letter-spacing: 0.08em;
    }
    .spec-box dd { margin: 0; font-family: var(--serif); font-size: 18px; }
    .spec-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .media-still {
      position: relative;
      min-height: 560px;
    }
    .media-still img {
      width: 100%;
      height: 560px;
      object-fit: cover;
      border-radius: var(--radius);
      filter: saturate(0.92);
    }
    .media-caption {
      position: absolute;
      left: 18px;
      bottom: 18px;
      background: rgba(252, 250, 246, 0.92);
      padding: 10px 14px;
      font-size: 13px;
      color: var(--walnut);
      border-left: 2px solid var(--brass);
    }
    .process {
      padding: var(--space-7) 0;
      background: #efe7db;
    }
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }
    .steps::before {
      content: "";
      position: absolute;
      top: 28px;
      left: 4%;
      right: 4%;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--brass), transparent);
      pointer-events: none;
    }
    .step {
      background: var(--paper);
      padding: 28px 24px 26px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      position: relative;
      min-height: 240px;
    }
    .step .no {
      font-family: var(--serif);
      color: var(--brass);
      font-size: 13px;
      letter-spacing: 0.16em;
      margin-bottom: 28px;
    }
    .step h3 { font-size: 22px; margin-bottom: 12px; }
    .step p { color: var(--muted); font-size: 14px; }
    .advantages {
      padding: var(--space-7) 0;
      background: var(--paper);
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .adv-card {
      position: relative;
      overflow: hidden;
      background: var(--cream);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      min-height: 280px;
      transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      border-color: var(--brass);
      box-shadow: var(--shadow);
    }
    .adv-card img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      transition: transform var(--dur) var(--ease);
    }
    .adv-card:hover img { transform: scale(1.04); }
    .adv-card .body { padding: 20px 22px 24px; }
    .adv-card .no {
      font-family: var(--serif);
      font-size: 28px;
      color: var(--brass);
      line-height: 1;
      margin-bottom: 8px;
    }
    .adv-card h3 { font-size: 20px; margin-bottom: 8px; }
    .adv-card p { font-size: 14px; color: var(--muted); }
    .adv-card--overlay .body {
      position: absolute;
      inset: auto 0 0 0;
      background: linear-gradient(180deg, transparent, rgba(22, 17, 14, 0.86));
      color: #F6F1EA;
    }
    .adv-card--overlay img { height: 100%; position: absolute; inset: 0; }
    .adv-card--overlay { min-height: 320px; }
    .adv-card--overlay h3, .adv-card--overlay .no { color: #F6F1EA; }
    .adv-card--overlay p { color: rgba(246, 241, 234, 0.78); }
    .adv-card--split { display: grid; grid-template-columns: 0.9fr 1.1fr; min-height: 280px; }
    .adv-card--split img { height: 100%; }
    .adv-card--dark { background: var(--char); color: #F6F1EA; }
    .adv-card--dark h3 { color: #F6F1EA; }
    .adv-card--dark p { color: rgba(246, 241, 234, 0.72); }
    .products {
      padding: var(--space-7) 0;
      background: var(--cream);
    }
    .product-stage {
      display: grid;
      grid-template-columns: 1.35fr 0.9fr;
      gap: 16px;
    }
    .product-stack { display: grid; gap: 16px; }
    .product-card {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--paper);
      border-radius: var(--radius);
      transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
    }
    .product-card:hover { transform: translateY(-4px); border-color: var(--brass); }
    .product-card img {
      width: 100%;
      object-fit: cover;
      transition: transform var(--dur) var(--ease);
    }
    .product-card:hover img { transform: scale(1.04); }
    .product-card--lead img { height: 420px; }
    .product-card--sub img { height: 168px; }
    .product-card .info { padding: 20px 22px 22px; }
    .product-card h3 { font-size: 22px; margin: 8px 0; }
    .product-card p { color: var(--muted); font-size: 14px; margin-bottom: 12px; }
    .meta-line { font-size: 13px; color: var(--walnut); display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
    .meta-line span::before { content: "·"; margin-right: 10px; color: var(--brass); }
    .meta-line span:first-child::before { content: none; margin: 0; }
    .texture {
      padding: var(--space-7) 0 0;
      background: var(--paper);
    }
    .texture-bar {
      height: 280px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .texture-bar::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(22, 17, 14, 0.35), transparent 55%);
    }
    .texture-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      padding: 56px 0 96px;
    }
    .note-list { display: grid; gap: 18px; }
    .note-list li {
      display: grid;
      grid-template-columns: 16px 1fr;
      gap: 12px;
      color: var(--muted);
    }
    .note-list i {
      width: 8px;
      height: 8px;
      border: 1px solid var(--brass);
      border-radius: 50%;
      margin-top: 9px;
    }
    .dark-case {
      position: relative;
      background: var(--char);
      color: #F4EBDD;
      padding: 108px 0;
      overflow: hidden;
    }
    .dark-case::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url("/assets/images/6e47cdd32b46de03.jpg") center/cover;
      opacity: 0.07;
      pointer-events: none;
    }
    .dark-wrap {
      position: relative;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .quote {
      font-family: var(--serif);
      font-size: clamp(28px, 3.4vw, 44px);
      line-height: 1.35;
      color: #FCFAF6;
      margin: 18px 0 22px;
    }
    .dark-case p { color: rgba(246, 241, 234, 0.76); max-width: 38em; }
    .case-photo {
      position: relative;
      min-height: 420px;
    }
    .case-photo img {
      width: 100%;
      height: 460px;
      object-fit: cover;
      border-radius: 4px;
      filter: contrast(1.05) saturate(0.9);
    }
    .case-stamp {
      position: absolute;
      left: 20px;
      bottom: 24px;
      font-family: var(--serif);
      font-size: 22px;
      color: #FCFAF6;
      text-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    }
    .audience {
      padding: var(--space-7) 0;
      background: var(--cream);
    }
    .audience-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 1fr;
      gap: 14px;
    }
    .who {
      padding: 28px 24px;
      border: 1px solid var(--line);
      background: var(--paper);
      min-height: 260px;
      border-radius: var(--radius);
    }
    .who--lead {
      background: var(--walnut);
      color: #F6F1EA;
      border-color: var(--walnut);
    }
    .who--lead h3 { color: #FCFAF6; }
    .who--lead p { color: rgba(246, 241, 234, 0.78); }
    .who .tag { font-size: 12px; letter-spacing: 0.12em; color: var(--brass); margin-bottom: 16px; }
    .who h3 { font-size: 22px; margin-bottom: 12px; }
    .who p { font-size: 14px; color: var(--muted); }
    .scenes {
      padding: 0 0 var(--space-7);
      background: var(--cream);
    }
    .scene-bento {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      grid-template-rows: 220px 220px;
      gap: 12px;
    }
    .scene {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      display: block;
    }
    .scene:first-child { grid-row: 1 / span 2; }
    .scene img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 500ms var(--ease);
    }
    .scene:hover img { transform: scale(1.05); }
    .scene span {
      position: absolute;
      left: 14px;
      bottom: 14px;
      background: rgba(252, 250, 246, 0.92);
      color: var(--walnut);
      font-size: 13px;
      padding: 6px 10px;
      border-left: 2px solid var(--brass);
    }
    .stats {
      padding: 48px 0;
      background: var(--paper);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .stat-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
    }
    .stat {
      text-align: left;
      padding: 18px 24px;
      border-right: 1px solid var(--line);
    }
    .stat:last-child { border-right: 0; }
    .stat b {
      display: block;
      font-family: var(--serif);
      font-size: clamp(32px, 4vw, 48px);
      color: var(--walnut);
      letter-spacing: -0.04em;
      line-height: 1.1;
    }
    .stat span { color: var(--muted); font-size: 14px; }
    .stories {
      padding: var(--space-7) 0;
      background: var(--cream);
    }
    .story {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 72px;
    }
    .story:last-child { margin-bottom: 0; }
    .story:nth-child(even) { grid-template-columns: 1.1fr 0.9fr; }
    .story:nth-child(even) .story-photo { order: 2; }
    .story img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      border-radius: var(--radius);
    }
    .story h3 { font-size: 28px; margin: 12px 0 16px; }
    .story p { color: var(--muted); max-width: 40em; }
    .reviews {
      padding: var(--space-7) 0;
      background: #efe7db;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .review {
      background: var(--paper);
      padding: 26px 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      min-height: 220px;
    }
    .stars { color: var(--brass); letter-spacing: 2px; font-size: 13px; margin-bottom: 12px; }
    .review p { font-size: 15px; color: var(--ink); margin-bottom: 18px; }
    .review .who-name { font-size: 13px; color: var(--muted); }
    .news {
      padding: var(--space-7) 0;
      background: var(--paper);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .news-card {
      border: 1px solid var(--line);
      background: var(--cream);
      border-radius: var(--radius);
      overflow: hidden;
      transition: transform var(--dur) var(--ease), border-color var(--dur);
    }
    .news-card:hover { transform: translateY(-4px); border-color: var(--brass); }
    .news-card img { width: 100%; height: 150px; object-fit: cover; }
    .news-card .body { padding: 18px 18px 22px; }
    .news-card h3 { font-size: 18px; margin-bottom: 8px; }
    .news-card p { font-size: 14px; color: var(--muted); }
    .metrics {
      padding: var(--space-7) 0;
      background: var(--cream);
    }
    .metric-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--paper);
      border: 1px solid var(--line);
    }
    .metric-table th, .metric-table td {
      text-align: left;
      padding: 18px 20px;
      border-bottom: 1px solid var(--line);
      font-size: 14px;
    }
    .metric-table th {
      font-weight: 500;
      color: var(--mist);
      font-size: 13px;
      letter-spacing: 0.06em;
      background: #f3ece2;
    }
    .metric-table tr:last-child td { border-bottom: 0; }
    .metric-table td:first-child { font-family: var(--serif); font-size: 16px; }
    .bar {
      height: 4px;
      background: #eadfcf;
      width: 100%;
      margin-top: 8px;
      position: relative;
    }
    .bar i {
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      background: var(--walnut);
    }
    .faq-cta { background: var(--paper); }
    .faq {
      padding: var(--space-7) 0 48px;
    }
    .acc { border-top: 1px solid var(--line); }
    .acc-item { border-bottom: 1px solid var(--line); }
    .acc-btn {
      width: 100%;
      text-align: left;
      min-height: 64px;
      padding: 18px 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 18px;
      font-family: var(--serif);
      color: var(--ink);
    }
    .acc-btn em {
      font-style: normal;
      color: var(--brass);
      font-size: 20px;
      width: 24px;
      text-align: center;
    }
    .acc-panel {
      display: none;
      padding: 0 8px 22px;
      color: var(--muted);
      max-width: 46em;
    }
    .acc-item.is-open .acc-panel { display: block; }
    .cta {
      background: var(--char);
      color: #F4EBDD;
      padding: 96px 0;
      position: relative;
    }
    .cta::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url("/assets/images/eb70fb2a011b44b3.jpg") center/cover;
      opacity: 0.08;
      pointer-events: none;
    }
    .cta-grid {
      position: relative;
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 56px;
      align-items: start;
    }
    .cta h2 { color: #FCFAF6; font-size: clamp(28px, 3vw, 40px); margin: 12px 0 18px; }
    .cta p { color: rgba(246, 241, 234, 0.76); max-width: 36em; }
    .hotline {
      margin-top: 28px;
      font-family: var(--serif);
      font-size: 28px;
      color: var(--sand);
    }
    .hotline a { color: var(--sand); }
    .form {
      background: rgba(252, 250, 246, 0.96);
      color: var(--ink);
      padding: 28px;
      border-radius: 6px;
      display: grid;
      gap: 14px;
    }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
    input, select, textarea {
      width: 100%;
      border: 1px solid var(--line-strong);
      background: #fff;
      min-height: 44px;
      padding: 10px 12px;
      color: var(--ink);
      border-radius: 2px;
    }
    textarea { min-height: 96px; resize: vertical; }
    .field-error input, .field-error select, .field-error textarea { border-color: #8a3b2a; box-shadow: 0 0 0 1px #8a3b2a; }
    .err {
      display: none;
      font-size: 12px;
      color: #8a3b2a;
    }
    .field-error .err { display: block; }
    .form-ok {
      display: none;
      padding: 12px 14px;
      background: #efe6d4;
      border-left: 2px solid var(--brass);
      font-size: 14px;
    }
    .site-footer {
      background: #120e0b;
      color: rgba(246, 241, 234, 0.72);
      padding: 64px 0 28px;
      font-size: 14px;
    }
    .foot-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.9fr 0.9fr 1fr;
      gap: 32px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(230, 213, 190, 0.12);
    }
    .site-footer .logo { color: #F6F1EA; }
    .site-footer h4 {
      font-family: var(--sans);
      font-size: 13px;
      letter-spacing: 0.16em;
      color: var(--sand);
      margin-bottom: 16px;
      font-weight: 500;
    }
    .site-footer a { color: rgba(246, 241, 234, 0.78); }
    .site-footer a:hover { color: var(--sand); }
    .foot-links { display: grid; gap: 8px; }
    .copy {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      padding-top: 22px;
      font-size: 12px;
      color: rgba(246, 241, 234, 0.45);
    }
    @media (max-width: 1024px) {
      .container { width: min(calc(100% - 36px), var(--container)); }
      .nav-desk { display: none; }
      .menu-toggle { display: flex; }
      .header-cta .btn-primary { display: none; }
      .mis-grid, .split, .dark-wrap, .cta-grid, .product-stage { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr 1fr; }
      .steps::before { display: none; }
      .adv-grid, .review-grid { grid-template-columns: 1fr 1fr; }
      .audience-grid { grid-template-columns: 1fr 1fr; }
      .news-grid { grid-template-columns: 1fr 1fr; }
      .scene-bento { grid-template-columns: 1fr 1fr; grid-template-rows: 200px 180px 180px; }
      .scene:first-child { grid-column: 1 / span 2; grid-row: auto; }
      .stat-row { grid-template-columns: 1fr 1fr; }
      .stat { border-bottom: 1px solid var(--line); }
      .story, .story:nth-child(even) { grid-template-columns: 1fr; }
      .story:nth-child(even) .story-photo { order: 0; }
      .adv-card--split { grid-template-columns: 1fr; }
      .adv-card--split img { height: 160px; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .media-still, .media-still img { min-height: 360px; height: 360px; }
      .hero h1 { font-size: clamp(32px, 7vw, 48px); }
    }
    @media (max-width: 768px) {
      .header-top .container { overflow-x: auto; }
      .top-right { display: none; }
      .hero { min-height: auto; }
      .hero-copy { min-height: 0; padding: 48px 0 120px; }
      .slides { position: relative; min-height: 72vw; }
      .slide { min-height: 72vw; }
      .slide-bg { position: absolute; }
      .hero-copy { background: var(--char); }
      .adv-grid, .review-grid, .news-grid, .audience-grid, .steps, .texture-grid, .form-row, .stat-row, .foot-grid {
        grid-template-columns: 1fr;
      }
      .product-card--lead img { height: 240px; }
      .scene-bento { grid-template-columns: 1fr; grid-template-rows: none; }
      .scene { height: 220px; }
      .scene:first-child { grid-column: auto; height: 280px; }
      .mis-item { grid-template-columns: 48px 1fr; }
      .mis-item a { grid-column: 2; }
      .section-head { margin-bottom: 32px; }
      .misconceptions, .solution, .process, .advantages, .products, .dark-case, .audience, .stories, .reviews, .news, .metrics, .faq, .cta {
        padding: 56px 0;
      }
      .quote { font-size: 26px; }
      .copy { flex-direction: column; }
      .stat { border-right: 0; }
    }
    @media (max-width: 520px) {
      .container { width: min(calc(100% - 28px), var(--container)); }
      .logo { font-size: 17px; }
      .slides, .slide { min-height: 125vw; }
      .hero-copy { padding: 36px 0 108px; }
      .hero-actions .btn { width: 100%; }
      .media-still img, .story img, .case-photo img { height: 240px; min-height: 240px; }
      .form { padding: 18px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation: none !important;
        transition: none !important;
      }
    }