/* roulang page: index */
:root {
      --c-accent: #E4572E;
      --c-accent-deep: #C44522;
      --c-assist: #1F8A80;
      --c-assist-deep: #176E66;
      --bg: #F3F0E8;
      --bg-dark: #14161A;
      --bg-dark-2: #1C1F24;
      --surface: #FFFcf7;
      --surface-2: #F7F3EA;
      --ink: #1A1B1E;
      --muted: #5E636A;
      --line: rgba(26, 27, 30, .12);
      --line-strong: rgba(26, 27, 30, .22);
      --light-line: rgba(255, 252, 247, .14);
      --radius-s: 2px;
      --radius: 6px;
      --radius-m: 8px;
      --shadow: 0 8px 24px rgba(20, 22, 26, .08);
      --shadow-hover: 0 12px 28px rgba(20, 22, 26, .12);
      --space: 24px;
      --container: 1240px;
      --nav-top: 38px;
      --nav-main: 66px;
      --header-h: 104px;
      --dock-h: 64px;
      --font: "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);
    }
    body {
      margin: 0;
      font-family: var(--font);
      color: var(--ink);
      background: var(--bg);
      font-size: 16px;
      line-height: 1.7;
      font-weight: 400;
      overflow-x: hidden;
      padding-bottom: var(--dock-h);
    }
    img { max-width: 100%; display: block; height: auto; }
    a { color: var(--c-assist-deep); text-decoration: none; transition: color .2s ease, opacity .2s ease; }
    a:hover { color: var(--c-accent); }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: .01em; line-height: 1.25; }
    p { margin: 0 0 1em; }
    ul, ol { margin: 0; padding: 0; }
    table { border-collapse: collapse; }
    :focus-visible {
      outline: 2px solid var(--c-accent);
      outline-offset: 3px;
    }
    .skip {
      position: absolute;
      left: -999px;
      top: 8px;
      background: var(--c-accent);
      color: #fff;
      padding: 8px 12px;
      z-index: 2000;
    }
    .skip:focus { left: 8px; }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
    .badge {
      display: inline-flex;
      align-items: center;
      height: 24px;
      padding: 0 8px;
      font-size: 12px;
      font-weight: 500;
      letter-spacing: .04em;
      color: var(--ink);
      background: var(--surface-2);
      border: 1px solid var(--line-strong);
      border-radius: var(--radius-s);
    }
    .badge-accent {
      background: var(--c-accent);
      color: #fff;
      border-color: var(--c-accent);
    }
    .kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--c-accent);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: .16em;
      text-transform: none;
      margin-bottom: 12px;
    }
    .kicker::before {
      content: "";
      width: 18px;
      height: 2px;
      background: var(--c-accent);
    }
    .section {
      padding: 88px 0;
      position: relative;
    }
    .section-head {
      max-width: 760px;
      margin-bottom: 36px;
    }
    .section-head h2 {
      font-size: clamp(26px, 2.4vw, 32px);
      margin-bottom: 14px;
    }
    .section-head p {
      color: var(--muted);
      font-size: 15px;
      margin: 0;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border-radius: var(--radius-s);
      font-weight: 600;
      font-size: 15px;
      letter-spacing: .02em;
      transition: background .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease;
      text-decoration: none;
      gap: 8px;
    }
    .btn-primary {
      background: var(--c-accent);
      color: #fff;
      box-shadow: 0 8px 18px rgba(228, 87, 46, .22);
    }
    .btn-primary:hover {
      background: var(--c-accent-deep);
      color: #fff;
      box-shadow: inset 0 0 0 2px var(--c-assist), 0 10px 20px rgba(228, 87, 46, .26);
      transform: translateY(-2px);
    }
    .btn-primary:active { transform: translateY(0); }
    .btn-ghost {
      background: transparent;
      color: #fff;
      border: 1px solid rgba(255, 252, 247, .55);
    }
    .btn-ghost:hover {
      background: rgba(255, 252, 247, .08);
      color: #fff;
      border-color: #fff;
      transform: translateY(-2px);
    }
    .btn-line {
      background: transparent;
      color: var(--ink);
      border: 1px solid var(--line-strong);
    }
    .btn-line:hover {
      border-color: var(--c-assist);
      color: var(--c-assist-deep);
      transform: translateY(-2px);
    }
    .btn-assist {
      background: var(--c-assist);
      color: #fff;
    }
    .btn-assist:hover {
      background: var(--c-assist-deep);
      color: #fff;
      transform: translateY(-2px);
    }
    .site-header {
      position: relative;
      z-index: 1000;
    }
    .topbar {
      height: var(--nav-top);
      background: var(--bg-dark);
      color: rgba(255, 252, 247, .78);
      font-size: 12px;
    }
    .topbar .container {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .top-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      white-space: nowrap;
    }
    .micro-mark {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 2px 8px;
      border: 1px solid rgba(255, 252, 247, .18);
      color: #d7efe8;
      letter-spacing: .08em;
    }
    .top-links {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .top-links a { color: rgba(255, 252, 247, .86); }
    .top-links a:hover { color: var(--c-accent); }
    .top-cta {
      min-height: 26px;
      padding: 0 10px;
      border: 1px solid var(--c-accent);
      color: #fff !important;
      font-weight: 600;
    }
    .top-cta:hover { background: var(--c-accent); }
    .mainbar {
      height: var(--nav-main);
      background: rgba(255, 252, 247, .92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: box-shadow .2s ease, border-color .2s ease, background .2s ease;
    }
    .mainbar.is-stuck {
      position: sticky;
      top: 0;
      border-bottom-color: var(--line);
      box-shadow: 0 8px 24px rgba(20, 22, 26, .06);
      background: rgba(255, 252, 247, .97);
    }
    .mainbar .container {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--ink);
      font-weight: 700;
      font-size: 18px;
      letter-spacing: .04em;
      flex-shrink: 0;
    }
    .logo:hover { color: var(--ink); opacity: .86; }
    .logo-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      background: var(--bg-dark);
      color: var(--c-accent);
      border-radius: var(--radius-s);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-links a {
      color: var(--ink);
      font-size: 14px;
      font-weight: 500;
      padding: 8px 10px;
      position: relative;
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 10px;
      right: 10px;
      bottom: 4px;
      height: 2px;
      background: var(--c-accent);
      transform: scaleX(0);
      transition: transform .2s ease;
    }
    .nav-links a:hover,
    .nav-links a.is-active { color: var(--c-accent); }
    .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-side {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .icon-btn {
      display: none;
      width: 44px;
      height: 44px;
      place-items: center;
      color: var(--ink);
      border: 1px solid var(--line);
      border-radius: var(--radius-s);
    }
    .burger span {
      display: block;
      width: 18px;
      height: 2px;
      background: currentColor;
      margin: 3px 0;
    }
    .drawer {
      position: fixed;
      inset: 0 0 0 auto;
      width: min(86vw, 360px);
      background: var(--surface);
      z-index: 1200;
      transform: translateX(100%);
      transition: transform .28s ease;
      box-shadow: -12px 0 40px rgba(20, 22, 26, .18);
      display: flex;
      flex-direction: column;
      padding: 22px;
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer-top { color: var(--muted); font-size: 13px; border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 12px; }
    .drawer a.d-link {
      display: flex;
      align-items: center;
      min-height: 48px;
      color: var(--ink);
      font-size: 18px;
      font-weight: 600;
      border-bottom: 1px solid var(--line);
    }
    .drawer-mask {
      position: fixed;
      inset: 0;
      background: rgba(20, 22, 26, .45);
      z-index: 1100;
      opacity: 0;
      pointer-events: none;
      transition: opacity .28s ease;
    }
    .drawer-mask.is-open { opacity: 1; pointer-events: auto; }
    .hero {
      position: relative;
      min-height: min(86vh, 780px);
      background: var(--bg-dark);
      color: #fff;
      overflow: hidden;
    }
    .hero-track { position: absolute; inset: 0; }
    .hero-slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity .6s ease;
      pointer-events: none;
    }
    .hero-slide.is-active { opacity: 1; pointer-events: auto; }
    .hero-slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: saturate(.92) contrast(1.05);
    }
    .hero-slide::after {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(20, 22, 26, .82) 0%, rgba(20, 22, 26, .55) 46%, rgba(20, 22, 26, .22) 100%),
        linear-gradient(180deg, rgba(20, 22, 26, .18) 0%, rgba(20, 22, 26, .55) 100%);
    }
    .hero-copy {
      position: relative;
      z-index: 2;
      padding: 72px 0 120px;
      display: grid;
      grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr);
      gap: 40px;
      align-items: end;
      min-height: min(86vh, 780px);
    }
    .hero h1, .hero .slide-title {
      font-size: clamp(28px, 4vw, 46px);
      font-weight: 700;
      margin-bottom: 14px;
      max-width: 16ch;
    }
    .hero .sub {
      font-size: 16px;
      color: rgba(255, 252, 247, .86);
      margin-bottom: 18px;
      max-width: 42ch;
    }
    .hero .lead {
      font-size: 15px;
      color: rgba(255, 252, 247, .78);
      max-width: 58ch;
      margin-bottom: 20px;
    }
    .hero-points {
      list-style: none;
      margin: 0 0 24px;
      display: grid;
      gap: 8px;
    }
    .hero-points li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 14px;
      color: #efe8dc;
    }
    .hero-points li::before {
      content: "";
      width: 8px;
      height: 8px;
      margin-top: 7px;
      background: var(--c-accent);
      flex-shrink: 0;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .param-panel {
      background: rgba(20, 22, 26, .55);
      border: 1px solid var(--light-line);
      padding: 18px 18px 10px;
      backdrop-filter: blur(8px);
    }
    .param-panel h3 {
      font-size: 13px;
      font-weight: 600;
      letter-spacing: .12em;
      color: var(--c-assist);
      margin-bottom: 12px;
    }
    .param-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 0;
      border-top: 1px solid var(--light-line);
      font-size: 14px;
    }
    .param-row span { color: rgba(255, 252, 247, .62); }
    .param-row b { font-weight: 600; font-variant-numeric: tabular-nums; }
    .hero-nav {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 28px;
      z-index: 3;
    }
    .hero-nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 28px;
      height: 4px;
      background: rgba(255, 252, 247, .28);
      border-radius: 0;
    }
    .dots button.is-active { background: var(--c-accent); }
    .hero-ctrl { display: flex; gap: 8px; }
    .hero-ctrl button {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(255, 252, 247, .35);
      color: #fff;
      font-size: 18px;
    }
    .hero-ctrl button:hover { border-color: #fff; background: rgba(255, 255, 255, .06); }
    .trustbar {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 18px;
      color: rgba(255, 252, 247, .72);
      font-size: 12px;
      letter-spacing: .08em;
    }
    .selling {
      background: var(--surface);
      padding: 28px 0 72px;
    }
    .sell-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }
    .sell-card {
      background: var(--surface);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      padding: 22px 22px 20px;
      border-radius: var(--radius);
      position: relative;
      overflow: hidden;
      transition: transform .2s ease, box-shadow .2s ease;
    }
    .sell-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .sell-card::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 4px;
      background: var(--c-accent);
    }
    .sell-ico {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      background: var(--bg);
      margin-bottom: 14px;
      color: var(--c-accent);
    }
    .sell-card h3 { font-size: 18px; margin-bottom: 8px; }
    .sell-card p { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
    .text-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--c-assist-deep);
    }
    .intro { background: var(--bg); }
    .intro-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 48px;
      align-items: center;
    }
    .media-frame {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-m);
      box-shadow: var(--shadow);
    }
    .media-frame img { width: 100%; height: 460px; object-fit: cover; }
    .media-cap {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      padding: 12px 14px;
      background: linear-gradient(180deg, transparent, rgba(20, 22, 26, .72));
      color: #fff;
      font-size: 12px;
    }
    .spec-list { list-style: none; display: grid; gap: 10px; margin: 18px 0 22px; }
    .spec-list li {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 10px;
      font-size: 14px;
      padding: 10px 12px;
      background: var(--surface);
      border-left: 4px solid var(--c-accent);
    }
    .spec-list b { font-variant-numeric: tabular-nums; }
    .scenes { background: var(--surface-2); }
    .scene-rail {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(260px, 1fr);
      gap: 14px;
      overflow-x: auto;
      padding-bottom: 8px;
      scroll-snap-type: x mandatory;
    }
    .scene-item {
      scroll-snap-align: start;
      background: var(--surface);
      border: 1px solid var(--line);
      min-height: 280px;
      display: flex;
      flex-direction: column;
      transition: transform .2s ease;
    }
    .scene-item:hover { transform: translateY(-3px); }
    .scene-item img { height: 148px; width: 100%; object-fit: cover; }
    .scene-item .body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
    .scene-item h3 { font-size: 18px; margin: 8px 0; }
    .scene-item p { color: var(--muted); font-size: 14px; flex: 1; }
    .adv { background: var(--bg); }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .adv-card {
      background: var(--surface);
      border: 1px solid var(--line);
      padding: 22px 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      min-height: 230px;
      transition: transform .2s ease, box-shadow .2s ease;
    }
    .adv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .adv-no {
      font-variant-numeric: tabular-nums;
      color: var(--c-accent);
      font-weight: 700;
      letter-spacing: .12em;
      font-size: 13px;
    }
    .adv-card h3 { font-size: 18px; margin: 8px 0 10px; }
    .adv-card p { color: var(--muted); font-size: 14px; margin: 0; }
    .products { background: var(--surface); }
    .prod-grid {
      display: grid;
      grid-template-columns: 1fr 1.18fr 1fr;
      gap: 16px;
      align-items: stretch;
    }
    .prod-card {
      background: var(--bg);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow);
      transition: transform .2s ease;
    }
    .prod-card:hover { transform: translateY(-3px); }
    .prod-card.is-feature {
      background: var(--bg-dark);
      color: #fff;
      transform: translateY(-8px);
    }
    .prod-card.is-feature p { color: rgba(255, 252, 247, .76); }
    .prod-card img { height: 210px; width: 100%; object-fit: cover; }
    .prod-card.is-feature img { height: 240px; }
    .prod-body { padding: 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .prod-meta {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      font-size: 13px;
    }
    .prod-meta span { color: var(--muted); }
    .prod-card.is-feature .prod-meta span { color: rgba(255, 252, 247, .55); }
    .cases {
      background: var(--bg-dark);
      color: #fff;
      overflow: hidden;
    }
    .cases::before {
      content: "";
      position: absolute;
      inset: 0 auto auto 0;
      width: 120px;
      height: 100%;
      background: repeating-linear-gradient(-45deg, rgba(228, 87, 46, .18) 0 6px, transparent 6px 12px);
      opacity: .35;
      pointer-events: none;
    }
    .case-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 36px;
      align-items: center;
      position: relative;
    }
    .case-grid img {
      width: 100%;
      height: 460px;
      object-fit: cover;
      filter: grayscale(.1) contrast(1.05);
    }
    .case-points { list-style: none; display: grid; gap: 14px; }
    .case-points li {
      padding: 12px 0 12px 16px;
      border-left: 2px solid var(--c-accent);
    }
    .case-points h3 { font-size: 18px; margin-bottom: 6px; }
    .case-points p { color: rgba(255, 252, 247, .72); font-size: 14px; margin: 0; }
    .industries { background: var(--bg); }
    .tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 22px;
    }
    .tabs button {
      min-height: 40px;
      padding: 0 14px;
      border: 1px solid var(--line-strong);
      background: var(--surface);
      color: var(--ink);
      font-weight: 600;
      font-size: 14px;
    }
    .tabs button.is-active,
    .tabs button:hover {
      background: var(--bg-dark);
      color: #fff;
      border-color: var(--bg-dark);
    }
    .tab-panel { display: none; }
    .tab-panel.is-active { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: center; }
    .tab-panel img { width: 100%; height: 320px; object-fit: cover; border-radius: var(--radius); }
    .stories { background: var(--surface); }
    .story {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 24px;
      padding: 22px 0;
      border-top: 1px solid var(--line);
    }
    .story img { width: 100%; height: 180px; object-fit: cover; }
    .quote {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .quote-meta { color: var(--muted); font-size: 14px; }
    .stats {
      background: var(--bg-dark-2);
      color: #fff;
      padding: 48px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 12px;
    }
    .stat {
      text-align: left;
      padding: 8px 8px 8px 14px;
      border-left: 2px solid var(--c-assist);
    }
    .stat b {
      display: block;
      font-size: 28px;
      font-variant-numeric: tabular-nums;
      color: #fff;
      line-height: 1.1;
    }
    .stat span { color: rgba(255, 252, 247, .62); font-size: 13px; }
    .compare { background: var(--bg); }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--surface); }
    table.compare-table {
      width: 100%;
      min-width: 720px;
      font-size: 14px;
    }
    .compare-table th, .compare-table td {
      padding: 14px 16px;
      text-align: left;
      border-bottom: 1px solid var(--line);
      vertical-align: top;
    }
    .compare-table thead th {
      background: var(--bg-dark);
      color: #fff;
      font-weight: 600;
    }
    .compare-table tbody th { font-weight: 600; width: 18%; background: var(--surface-2); }
    .compare-table td.good { color: var(--c-assist-deep); font-weight: 600; }
    .reviews { background: var(--surface-2); }
    .review-track {
      display: grid;
      grid-template-columns: 1.2fr .8fr 1fr;
      gap: 14px;
    }
    .review {
      background: var(--surface);
      border: 1px solid var(--line);
      padding: 20px;
      box-shadow: var(--shadow);
    }
    .review:nth-child(2) { margin-top: 28px; }
    .review:nth-child(3) { margin-top: 12px; }
    .stars { color: var(--c-accent); letter-spacing: 2px; font-size: 13px; margin-bottom: 8px; }
    .review p { font-size: 14px; }
    .review .who { color: var(--muted); font-size: 13px; }
    .process { background: var(--bg); }
    .steps {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 0;
      position: relative;
    }
    .steps::before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 17px;
      height: 2px;
      background: repeating-linear-gradient(90deg, var(--ink) 0 8px, transparent 8px 14px);
      opacity: .28;
    }
    .step { padding: 0 10px 0 0; position: relative; }
    .tick {
      width: 16px;
      height: 16px;
      background: var(--c-accent);
      margin-bottom: 14px;
      position: relative;
      z-index: 1;
    }
    .step h3 { font-size: 16px; margin-bottom: 6px; }
    .step p { color: var(--muted); font-size: 13px; margin: 0; }
    .news { background: var(--surface); }
    .news-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 16px;
    }
    .news-card {
      background: var(--bg);
      border: 1px solid var(--line);
      display: flex;
      flex-direction: column;
    }
    .news-card img { height: 180px; object-fit: cover; width: 100%; }
    .news-card .body { padding: 16px; }
    .news-card time { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
    .news-card h3 { font-size: 18px; margin: 6px 0 8px; }
    .news-card p { color: var(--muted); font-size: 14px; margin: 0; }
    .news-card.wide { grid-row: span 1; }
    .faq { background: var(--bg); }
    .faq-list { border-top: 1px solid var(--line-strong); }
    .faq-item {
      border-bottom: 1px solid var(--line-strong);
      background: transparent;
    }
    .faq-item summary {
      list-style: none;
      cursor: pointer;
      min-height: 56px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-weight: 600;
      font-size: 16px;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: "+";
      color: var(--c-accent);
      font-size: 22px;
      font-weight: 500;
      min-width: 24px;
      text-align: center;
    }
    .faq-item[open] summary::after { content: "－"; }
    .faq-item .ans {
      color: var(--muted);
      font-size: 15px;
      padding: 0 0 16px;
    }
    .guarantee {
      background: var(--surface);
      padding: 56px 0;
    }
    .g-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }
    .g-item {
      border: 1px solid var(--line);
      padding: 18px;
      background: var(--bg);
    }
    .g-item h3 { font-size: 18px; margin: 8px 0; }
    .g-item p { color: var(--muted); font-size: 14px; margin: 0; }
    .contact {
      background: var(--surface-2);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 28px;
    }
    form.lead-form {
      background: var(--surface);
      padding: 24px;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      display: grid;
      gap: 14px;
    }
    .field { display: grid; gap: 6px; }
    .field label { font-size: 13px; font-weight: 600; }
    .field input, .field select, .field textarea {
      min-height: 44px;
      border: 1px solid var(--line-strong);
      background: #fff;
      padding: 8px 12px;
      color: var(--ink);
      border-radius: var(--radius-s);
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus {
      outline: 2px solid var(--c-accent);
      border-color: var(--c-accent);
    }
    .field .err { color: #b42318; font-size: 12px; min-height: 16px; }
    .form-ok {
      display: none;
      padding: 12px;
      background: rgba(31, 138, 128, .12);
      color: var(--c-assist-deep);
      border: 1px solid var(--c-assist);
      font-size: 14px;
    }
    .form-ok.is-show { display: block; }
    .contact-side {
      background: var(--bg-dark);
      color: #fff;
      padding: 28px;
      position: relative;
    }
    .contact-side::after {
      content: "";
      position: absolute;
      right: 0;
      top: 0;
      width: 48px;
      height: 100%;
      background: repeating-linear-gradient(45deg, rgba(228, 87, 46, .22) 0 5px, transparent 5px 10px);
      opacity: .4;
    }
    .contact-side a { color: #fff; }
    .contact-side dl { margin: 18px 0 0; }
    .contact-side dt { font-size: 12px; color: rgba(255, 252, 247, .5); letter-spacing: .1em; }
    .contact-side dd { margin: 0 0 14px; font-size: 16px; font-weight: 600; }
    .site-footer {
      background: #101216;
      color: rgba(255, 252, 247, .74);
      padding: 56px 0 28px;
      font-size: 14px;
    }
    .foot-grid {
      display: grid;
      grid-template-columns: 1.3fr .8fr .9fr 1fr;
      gap: 28px;
      margin-bottom: 28px;
    }
    .site-footer h3 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 12px;
    }
    .site-footer a { color: rgba(255, 252, 247, .74); }
    .site-footer a:hover { color: var(--c-accent); }
    .foot-links { list-style: none; display: grid; gap: 8px; }
    .copy {
      border-top: 1px solid rgba(255, 252, 247, .1);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      color: rgba(255, 252, 247, .5);
      font-size: 12px;
    }
    .dock {
      position: fixed;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 900;
      background: var(--bg-dark);
      color: #fff;
      min-height: var(--dock-h);
      display: none;
      border-top: 2px solid var(--c-accent);
    }
    .dock.is-show { display: block; }
    .dock .container {
      min-height: var(--dock-h);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .dock p { margin: 0; font-size: 14px; font-weight: 600; }
    .dock-actions { display: flex; gap: 10px; align-items: center; }
    .dock a.tel { color: #fff; font-variant-numeric: tabular-nums; }
    @media (max-width: 1440px) {
      .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 18px 12px; }
    }
    @media (max-width: 1024px) {
      .hero-copy { grid-template-columns: 1fr; min-height: auto; padding: 56px 0 110px; }
      .param-panel { max-width: 420px; }
      .intro-grid, .case-grid, .contact-grid, .tab-panel.is-active { grid-template-columns: 1fr; }
      .prod-grid, .adv-grid, .news-grid, .review-track, .g-grid, .foot-grid { grid-template-columns: 1fr 1fr; }
      .prod-card.is-feature { transform: none; }
      .steps { grid-template-columns: repeat(3, 1fr); gap: 22px; }
      .steps::before { display: none; }
      .media-frame img, .case-grid img { height: 360px; }
      .nav-links { display: none; }
      .icon-btn { display: grid; }
      .stats-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 768px) {
      .container { width: min(100% - 28px, var(--container)); }
      .section { padding: 56px 0; }
      .topbar { display: none; }
      .sell-grid, .prod-grid, .adv-grid, .news-grid, .review-track, .g-grid, .foot-grid, .stats-grid {
        grid-template-columns: 1fr;
      }
      .steps { grid-template-columns: 1fr 1fr; }
      .story { grid-template-columns: 1fr; }
      .hero h1, .hero .slide-title { max-width: none; }
      .dock p { font-size: 13px; }
      .mainbar .btn-primary { display: none; }
      .review:nth-child(2), .review:nth-child(3) { margin-top: 0; }
      .media-frame img, .case-grid img, .prod-card img, .prod-card.is-feature img { height: 220px; }
    }
    @media (max-width: 520px) {
      .hero-actions, .dock-actions, .dock .container { flex-direction: column; align-items: stretch; }
      .dock { padding: 8px 0; }
      .btn { width: 100%; }
      .steps { grid-template-columns: 1fr; }
      .hero { min-height: auto; }
    }

/* roulang page: index */
:root {
      --steel: #1C1F24;
      --steel-2: #262A31;
      --graphite: #2E333B;
      --orange: #E85A1A;
      --orange-deep: #C94A12;
      --orange-press: #A83D0F;
      --teal: #1F8A7A;
      --teal-deep: #17685C;
      --paper: #F3F0EA;
      --alumin: #E4E1DA;
      --card: #FFFFFF;
      --ink: #1A1A1A;
      --muted: #5C6168;
      --line: #D7D2C8;
      --danger: #C0392B;
      --ok: #1F8A7A;
      --radius: 10px;
      --radius-sm: 8px;
      --shadow: 0 6px 18px rgba(28, 31, 36, .06);
      --shadow-hover: 0 10px 22px rgba(28, 31, 36, .10);
      --container: 1240px;
      --nav-h: 72px;
      --tool-h: 40px;
      --stick-h: 64px;
      --space: 88px;
      --space-m: 48px;
      --font: "Noto Sans SC", "Source Han Sans SC", "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: 1.75;
      padding-bottom: calc(var(--stick-h) + 12px);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0; letter-spacing: -.02em; font-weight: 700; line-height: 1.28; color: var(--ink); }
    p { margin: 0; }
    ul { margin: 0; padding: 0; list-style: none; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .skip {
      position: absolute; left: -999px; top: 8px;
      background: var(--orange); color: #fff; padding: 8px 12px; z-index: 100;
    }
    .skip:focus { left: 8px; }
    .site-header {
      position: relative;
      z-index: 80;
    }
    .toolbar {
      background: var(--steel);
      color: #D8D6D1;
      font-size: 13px;
      min-height: var(--tool-h);
      display: flex;
      align-items: center;
    }
    .toolbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: min(var(--container), calc(100% - 40px));
      margin: 0 auto;
      min-height: var(--tool-h);
    }
    .toolbar-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
    .toolbar-meta span, .toolbar-meta a { display: inline-flex; align-items: center; gap: 6px; min-height: 32px; }
    .toolbar a:hover, .toolbar a:focus-visible { color: #fff; }
    .toolbar-cta {
      color: #fff !important;
      background: var(--orange);
      border-radius: 6px;
      padding: 4px 12px;
      font-weight: 600;
      min-height: 28px;
    }
    .toolbar-cta:hover { background: var(--orange-deep); }
    .mainbar {
      background: #F7F5F0;
      border-bottom: 1px solid var(--alumin);
      min-height: var(--nav-h);
    }
    .mainbar.is-sticky {
      position: sticky;
      top: 0;
      z-index: 90;
      box-shadow: 0 6px 16px rgba(28,31,36,.08);
    }
    .mainbar-inner {
      width: min(var(--container), calc(100% - 40px));
      margin: 0 auto;
      min-height: var(--nav-h);
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
      min-height: 44px;
    }
    .logo-mark {
      width: 36px; height: 36px; border-radius: 8px;
      background: var(--steel); color: #fff;
      display: grid; place-items: center;
      font-size: 13px; font-weight: 700; letter-spacing: 0;
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 16px; color: var(--steel); }
    .logo-text small { font-size: 11px; color: var(--muted); font-weight: 500; letter-spacing: .08em; }
    .nav-list {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
      justify-content: flex-end;
    }
    .nav-list a {
      position: relative;
      padding: 10px 10px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      color: var(--ink);
      font-size: 14px;
      font-weight: 600;
    }
    .nav-list a::after {
      content: "";
      position: absolute; left: 10px; right: 10px; bottom: 6px;
      height: 2px; background: var(--orange); transform: scaleX(0);
      transform-origin: left; transition: transform .2s ease;
    }
    .nav-list a:hover, .nav-list a:focus-visible, .nav-list a.is-active { color: var(--orange); }
    .nav-list a:hover::after, .nav-list a:focus-visible::after, .nav-list a.is-active::after { transform: scaleX(1); }
    .nav-cta {
      margin-left: 8px;
      background: var(--orange);
      color: #fff !important;
      border: 0;
      border-radius: 8px;
      padding: 10px 16px !important;
      min-height: 44px;
      font-weight: 600;
    }
    .nav-cta::after { display: none !important; }
    .nav-cta:hover, .nav-cta:focus-visible { background: var(--orange-deep); color: #fff !important; }
    .nav-cta:active { background: var(--orange-press); transform: translateY(1px); }
    .menu-btn {
      display: none;
      width: 44px; height: 44px;
      border: 1px solid var(--line);
      background: #fff;
      border-radius: 8px;
      align-items: center; justify-content: center; flex-direction: column; gap: 5px;
    }
    .menu-btn span { width: 18px; height: 2px; background: var(--steel); display: block; }
    .drawer {
      display: none;
      position: fixed; inset: 0; z-index: 120;
      background: rgba(28,31,36,.46);
    }
    .drawer.is-open { display: block; }
    .drawer-panel {
      position: absolute; top: 0; right: 0; width: min(86vw, 360px); height: 100%;
      background: #fff; padding: 20px 18px 88px;
      overflow: auto;
      box-shadow: -12px 0 30px rgba(0,0,0,.12);
    }
    .drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
    .drawer-close {
      width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
    }
    .drawer-tools { background: var(--steel); color: #ddd; border-radius: 10px; padding: 14px; margin-bottom: 16px; font-size: 13px; }
    .drawer-tools a { color: #fff; display: block; min-height: 36px; }
    .drawer-nav a {
      display: flex; align-items: center; min-height: 48px;
      border-bottom: 1px solid var(--alumin); font-weight: 600;
    }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 18px; border-radius: 8px;
      border: 1px solid transparent; font-weight: 600; font-size: 15px;
      transition: background .2s ease, transform .15s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .btn:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }
    .btn:active { transform: translateY(1px); }
    .btn-primary { background: var(--orange); color: #fff; }
    .btn-primary:hover { background: var(--orange-deep); }
    .btn-primary:active { background: var(--orange-press); }
    .btn-ghost {
      background: transparent; color: #fff; border-color: rgba(255,255,255,.55);
    }
    .btn-ghost:hover { background: rgba(255,255,255,.1); }
    .btn-line {
      background: #fff; color: var(--steel); border-color: var(--steel);
    }
    .btn-line:hover { border-color: var(--orange); color: var(--orange); }
    .btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
    .hero { position: relative; overflow: hidden; background: var(--steel); }
    .hero-track { display: flex; width: 300%; transition: transform .55s ease; }
    .hero-slide {
      width: 33.333%;
      position: relative;
      min-height: clamp(520px, 86vh, 740px);
      display: flex; align-items: flex-end;
    }
    .hero-slide img {
      position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
    }
    .hero-slide::after {
      content: "";
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(20,22,26,.82) 0%, rgba(20,22,26,.55) 46%, rgba(20,22,26,.28) 100%),
        linear-gradient(0deg, rgba(20,22,26,.55), transparent 42%);
    }
    .hero-grid {
      position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: .18;
      background-image:
        linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
      background-size: 48px 48px;
    }
    .hero-arm {
      position: absolute; right: 6%; bottom: 8%; z-index: 1; width: min(280px, 36vw); opacity: .18; pointer-events: none;
    }
    .hero-copy {
      position: relative; z-index: 2; width: min(var(--container), calc(100% - 40px));
      margin: 0 auto 86px; color: #fff; max-width: 760px;
    }
    .hero-kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: #F3D2C2; font-size: 13px; font-weight: 600; letter-spacing: .12em;
      margin-bottom: 14px;
    }
    .hero h1, .hero-visual-title {
      font-size: clamp(30px, 4.4vw, 52px);
      color: #fff; margin-bottom: 14px;
    }
    .hero-sub { font-size: 18px; color: #E8E4DC; margin-bottom: 16px; }
    .hero-lead { color: #D4D0C8; max-width: 640px; margin-bottom: 22px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-trust { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
    .chip {
      display: inline-flex; align-items: center; min-height: 32px;
      padding: 0 10px; border: 1px solid rgba(255,255,255,.28);
      border-radius: 999px; font-size: 12px; color: #EEE;
    }
    .hero-nav, .hero-dots { position: absolute; z-index: 3; }
    .hero-nav {
      top: 50%; transform: translateY(-50%);
      width: 44px; height: 44px; border-radius: 50%;
      border: 1px solid rgba(255,255,255,.35); background: rgba(28,31,36,.35); color: #fff;
    }
    .hero-nav:hover, .hero-nav:focus-visible { background: var(--orange); border-color: var(--orange); }
    .hero-prev { left: 16px; }
    .hero-next { right: 16px; }
    .hero-dots {
      left: 50%; bottom: 22px; transform: translateX(-50%);
      display: flex; gap: 8px;
    }
    .hero-dots button {
      width: 28px; height: 8px; border: 0; border-radius: 99px; background: rgba(255,255,255,.35);
    }
    .hero-dots button.is-on, .hero-dots button:hover, .hero-dots button:focus-visible { background: var(--orange); }
    section { padding: var(--space) 0; }
    .sec-head { max-width: 760px; margin-bottom: 36px; }
    .sec-head h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 12px; }
    .sec-head p { color: var(--muted); }
    .sell { background: #fff; border-top: 1px solid var(--alumin); border-bottom: 1px solid var(--alumin); }
    .sell-grid {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
    }
    .sell-card {
      background: var(--paper);
      border: 1px solid var(--alumin);
      border-radius: var(--radius);
      padding: 24px 22px;
      min-height: 100%;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .sell-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: var(--orange);
    }
    .sell-ico {
      width: 44px; height: 44px; border-radius: 8px;
      background: var(--steel); color: #fff; display: grid; place-items: center; margin-bottom: 14px; font-weight: 700;
    }
    .sell-card h3 { font-size: 20px; margin-bottom: 8px; }
    .metric {
      font-variant-numeric: tabular-nums;
      color: var(--teal); font-size: 22px; font-weight: 700; margin: 8px 0;
    }
    .badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
    .badge {
      font-size: 12px; color: var(--steel); background: #fff;
      border: 1px solid var(--line); border-radius: 999px; padding: 4px 8px;
    }
    .intro { background: var(--paper); }
    .intro-grid {
      display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
    }
    .intro-copy h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
    .intro-copy p { color: var(--muted); margin-bottom: 14px; }
    .spec-list { display: grid; gap: 10px; margin: 18px 0 22px; }
    .spec-list li {
      display: grid; grid-template-columns: 92px 1fr; gap: 10px;
      background: #fff; border: 1px solid var(--alumin); border-radius: 8px; padding: 10px 12px;
    }
    .spec-list b { color: var(--teal); font-variant-numeric: tabular-nums; }
    .media {
      position: relative; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow);
    }
    .media img { width: 100%; height: 460px; object-fit: cover; }
    .media-tag {
      position: absolute; left: 14px; bottom: 14px;
      background: rgba(28,31,36,.86); color: #fff; padding: 8px 12px; border-radius: 8px; font-size: 13px;
    }
    .scenes { background: #fff; }
    .scene-rail {
      display: grid; grid-auto-flow: column; grid-auto-columns: minmax(280px, 1fr);
      gap: 16px; overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x mandatory;
    }
    .scene-card {
      scroll-snap-align: start;
      border-radius: 12px; overflow: hidden; background: var(--steel); color: #fff;
      min-height: 360px; position: relative;
      border: 1px solid transparent;
      transition: transform .2s ease, border-color .2s ease;
    }
    .scene-card:hover, .scene-card:focus-within { transform: translateY(-3px); border-color: var(--orange); }
    .scene-card img { width: 100%; height: 360px; object-fit: cover; opacity: .72; }
    .scene-body { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px; }
    .scene-body h3 { color: #fff; font-size: 20px; margin-bottom: 6px; }
    .scene-body p { color: #DDD; font-size: 14px; }
    .adv { background: var(--paper); }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .adv-card {
      background: #fff; border: 1px solid var(--alumin); border-radius: var(--radius);
      padding: 22px; box-shadow: var(--shadow);
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .adv-card:hover { transform: translateY(-4px); border-color: var(--teal); box-shadow: var(--shadow-hover); }
    .adv-card.wide { grid-column: span 1; }
    .adv-card h3 { font-size: 18px; margin: 8px 0; }
    .adv-card p { color: var(--muted); font-size: 15px; }
    .adv-no { color: var(--orange); font-weight: 700; font-variant-numeric: tabular-nums; font-size: 13px; letter-spacing: .08em; }
    .tagline { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
    .tag {
      background: var(--paper); border: 1px solid var(--line); border-radius: 6px;
      font-size: 12px; padding: 3px 8px; color: var(--muted);
    }
    .products { background: #fff; }
    .prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .prod-card {
      background: #fff; border: 1px solid var(--alumin); border-radius: 12px; overflow: hidden;
      box-shadow: var(--shadow); display: flex; flex-direction: column;
      transition: transform .2s ease, border-color .2s ease;
    }
    .prod-card:hover { transform: translateY(-4px); border-color: var(--orange); }
    .prod-card img { width: 100%; height: 220px; object-fit: cover; }
    .prod-body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .prod-body h3 { font-size: 20px; }
    .params { display: grid; gap: 8px; }
    .params li {
      display: flex; justify-content: space-between; gap: 12px;
      border-bottom: 1px dashed var(--alumin); padding-bottom: 6px; font-size: 14px;
    }
    .params span { color: var(--muted); }
    .params b { font-variant-numeric: tabular-nums; color: var(--steel); }
    .deliver { background: var(--paper); }
    .deliver-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: stretch; }
    .steps { display: grid; gap: 0; }
    .step {
      display: grid; grid-template-columns: 56px 1fr; gap: 12px;
      padding: 16px 0; border-left: 0;
    }
    .step-no {
      width: 44px; height: 44px; border-radius: 50%;
      background: var(--steel); color: #fff; display: grid; place-items: center; font-weight: 700;
    }
    .step h3 { font-size: 18px; margin-bottom: 4px; }
    .step p { color: var(--muted); }
    .deliver-media img { width: 100%; height: 100%; min-height: 420px; object-fit: cover; border-radius: 12px; }
    .cases {
      background: var(--steel);
      color: #EEE;
      position: relative;
    }
    .cases::before {
      content: ""; position: absolute; inset: 0; opacity: .07; pointer-events: none;
      background: repeating-linear-gradient(90deg, #fff 0 1px, transparent 1px 7px);
    }
    .cases .sec-head h2, .cases .sec-head p { color: #fff; }
    .cases .sec-head p { color: #C9C6C0; }
    .case-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; position: relative; }
    .case-photo { border-radius: 12px; overflow: hidden; min-height: 420px; }
    .case-photo img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .case-list { display: grid; gap: 14px; }
    .case-item {
      background: var(--graphite); border: 1px solid #3A4048; border-radius: 10px; padding: 18px;
      transition: border-color .2s ease, transform .2s ease;
    }
    .case-item:hover { border-color: var(--orange); transform: translateY(-2px); }
    .case-item h3 { color: #fff; font-size: 18px; margin-bottom: 8px; }
    .nums { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .nums b { display: block; color: var(--orange); font-size: 20px; font-variant-numeric: tabular-nums; }
    .nums span { color: #B7B3AC; font-size: 12px; }
    .compare { background: #fff; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--alumin); border-radius: 12px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 680px; }
    th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--alumin); font-size: 14px; }
    th { background: var(--steel); color: #fff; font-weight: 600; }
    td:nth-child(3) { color: var(--teal-deep); font-weight: 600; }
    tr:hover td { background: #FBF9F4; }
    .stack-compare { display: none; gap: 12px; }
    .cmp-card { background: #fff; border: 1px solid var(--alumin); border-radius: 10px; padding: 16px; }
    .cmp-card h3 { margin-bottom: 8px; font-size: 16px; }
    .cmp-card p { color: var(--muted); font-size: 14px; }
    .stories { background: var(--paper); }
    .story-main {
      display: grid; grid-template-columns: .9fr 1.1fr; gap: 24px; background: #fff;
      border: 1px solid var(--alumin); border-radius: 12px; overflow: hidden; margin-bottom: 16px;
    }
    .story-main img { width: 100%; height: 100%; min-height: 320px; object-fit: cover; }
    .story-copy { padding: 28px; }
    .quote { font-size: 20px; line-height: 1.6; margin: 12px 0 16px; }
    .role { color: var(--muted); font-size: 14px; }
    .story-side { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .mini-story {
      background: #fff; border: 1px solid var(--alumin); border-radius: 12px; overflow: hidden;
      transition: transform .2s ease, border-color .2s ease;
    }
    .mini-story:hover { transform: translateY(-3px); border-color: var(--teal); }
    .mini-story img { width: 100%; height: 180px; object-fit: cover; }
    .mini-story div { padding: 16px; }
    .stats {
      background: linear-gradient(90deg, var(--steel) 0 42%, #23272E 42% 100%);
      color: #fff; padding: 36px 0;
    }
    .stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .stat {
      padding: 8px 8px 8px 16px; border-left: 2px solid var(--orange);
    }
    .stat b {
      display: block; font-size: 30px; font-variant-numeric: tabular-nums; line-height: 1.2;
    }
    .stat span { color: #C9C6C0; font-size: 13px; }
    .reviews { background: #fff; }
    .review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .review {
      background: var(--paper); border: 1px solid var(--alumin); border-radius: 10px; padding: 18px;
      transition: transform .2s ease, border-color .2s ease;
    }
    .review:hover { transform: translateY(-3px); border-color: var(--orange); }
    .review p { color: var(--ink); font-size: 14px; margin: 10px 0 14px; }
    .who { font-size: 13px; color: var(--muted); font-weight: 600; }
    .news { background: var(--paper); }
    .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .news-card {
      background: #fff; border: 1px solid var(--alumin); border-radius: 12px; overflow: hidden;
      transition: transform .2s ease, border-color .2s ease;
    }
    .news-card:hover { transform: translateY(-3px); border-color: var(--teal); }
    .news-card img { width: 100%; height: 160px; object-fit: cover; }
    .news-card div { padding: 16px; }
    .date { color: var(--muted); font-size: 12px; }
    .news-card h3 { font-size: 16px; margin: 6px 0 8px; }
    .news-card p { color: var(--muted); font-size: 14px; }
    .faq { background: #fff; }
    .acc { border: 1px solid var(--alumin); border-radius: 12px; overflow: hidden; }
    .acc-item + .acc-item { border-top: 1px solid var(--alumin); }
    .acc-btn {
      width: 100%; text-align: left; background: #fff; border: 0;
      min-height: 56px; padding: 14px 18px; font-weight: 700; font-size: 16px;
      display: flex; justify-content: space-between; gap: 12px; align-items: center;
    }
    .acc-btn:hover, .acc-btn:focus-visible { color: var(--orange); }
    .acc-btn[aria-expanded="true"] { background: #F7F4EE; color: var(--orange); }
    .acc-panel { display: none; background: #F7F4EE; padding: 0 18px 16px; color: var(--muted); }
    .acc-panel.is-open { display: block; }
    .plus { width: 22px; text-align: center; color: var(--orange); }
    .guarantee { background: var(--paper); }
    .g-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .g-item {
      background: #fff; border: 1px solid var(--alumin); border-radius: 10px; padding: 18px 14px;
      text-align: left; min-height: 120px;
      transition: transform .2s ease, border-color .2s ease;
    }
    .g-item:hover { transform: translateY(-3px); border-color: var(--orange); }
    .g-item strong { display: block; margin: 8px 0 4px; }
    .g-item span { color: var(--muted); font-size: 13px; }
    .cta { background: #1A130F; color: #fff; }
    .cta-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: start; }
    .cta h2 { color: #fff; font-size: clamp(26px, 3vw, 36px); margin-bottom: 12px; }
    .cta p { color: #D8D0C8; margin-bottom: 18px; }
    .phone-xl { font-size: 28px; font-weight: 700; color: var(--orange); font-variant-numeric: tabular-nums; }
    .form {
      background: #241C16; border: 1px solid #3A2C24; border-radius: 12px; padding: 22px;
    }
    .form-row { margin-bottom: 12px; }
    label { display: block; font-size: 13px; margin-bottom: 6px; color: #E4DCD4; }
    .req { color: var(--orange); }
    input, select, textarea {
      width: 100%; min-height: 44px; border-radius: 8px;
      border: 1px solid #4A3B32; background: #2B221C; color: #fff;
      padding: 10px 12px; font-size: 15px;
    }
    textarea { min-height: 90px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid var(--teal); border-color: var(--teal); }
    input.is-err, select.is-err, textarea.is-err { border-color: var(--danger); }
    input.is-ok { border-color: var(--ok); }
    .form-msg { display: none; margin-top: 10px; padding: 10px 12px; border-radius: 8px; }
    .form-msg.ok { display: block; background: rgba(31,138,122,.18); color: #9BE7D8; }
    .form-msg.err { display: block; background: rgba(192,57,43,.16); color: #F3B1AB; }
    .site-footer {
      background: var(--steel); color: #C9C6C0; padding: 48px 0 28px;
    }
    .foot-grid { display: grid; grid-template-columns: 1.2fr .9fr 1fr; gap: 28px; margin-bottom: 28px; }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
    .site-footer a { display: inline-flex; min-height: 36px; align-items: center; }
    .site-footer a:hover, .site-footer a:focus-visible { color: #fff; }
    .copy { border-top: 1px solid #33383F; padding-top: 16px; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
    .floatbar {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 70;
      background: var(--steel); color: #fff;
      border-top: 2px solid var(--orange);
      min-height: var(--stick-h);
      display: flex; align-items: center;
    }
    body.hide-float .floatbar { transform: translateY(110%); }
    .floatbar { transition: transform .2s ease; }
    .float-inner {
      width: min(var(--container), calc(100% - 24px));
      margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 12px;
    }
    .float-inner p { font-size: 14px; }
    .float-actions { display: flex; gap: 8px; align-items: center; }
    .float-actions a { min-height: 44px; }
    @media (max-width: 1199px) {
      .nav-list { display: none; }
      .menu-btn { display: inline-flex; margin-left: auto; }
      .intro-grid, .deliver-wrap, .case-grid, .story-main, .cta-grid { grid-template-columns: 1fr; }
      .adv-grid, .prod-grid { grid-template-columns: 1fr 1fr; }
      .review-grid, .news-grid, .stats-grid, .g-grid { grid-template-columns: 1fr 1fr; }
      .hero-slide { min-height: 620px; }
      .media img, .case-photo img, .deliver-media img { min-height: 280px; height: 320px; }
    }
    @media (max-width: 767px) {
      :root { --space: 48px; }
      .toolbar { display: none; }
      .container, .toolbar-inner, .mainbar-inner, .hero-copy { width: calc(100% - 28px); }
      .sell-grid, .adv-grid, .prod-grid, .story-side, .review-grid, .news-grid, .stats-grid, .g-grid, .foot-grid {
        grid-template-columns: 1fr;
      }
      .hero-copy { margin-bottom: 92px; }
      .hero-slide { min-height: auto; padding-top: 36px; }
      .hero-slide img { min-height: 520px; }
      .hero-nav { display: none; }
      .table-wrap { display: none; }
      .stack-compare { display: grid; }
      .float-inner { flex-direction: column; align-items: stretch; padding: 8px 0; }
      .float-inner p { display: none; }
      .float-actions { width: 100%; }
      .float-actions .btn, .float-actions a { flex: 1; }
      .copy { flex-direction: column; }
      .quote { font-size: 18px; }
    }
    @media (max-width: 520px) {
      .hero-actions .btn { width: 100%; }
      .logo-text small { display: none; }
      .params li { flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .hero-track, .sell-card, .btn { transition: none; }
    }