:root {
      --bg: #17120f;
      --bg-soft: #221812;
      --panel: #fff7e8;
      --panel-deep: #2d2119;
      --panel-warm: #f5e7ce;
      --text: #f8ead2;
      --text-dark: #241911;
      --muted: #cbb99a;
      --muted-dark: #6d5b45;
      --gold: #d7a64a;
      --gold-soft: #f0c66a;
      --wine: #7d2e2e;
      --green: #315043;
      --line: rgba(215, 166, 74, 0.28);
      --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
      --radius: 24px;
      --container: 1160px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 0%, rgba(215, 166, 74, 0.18), transparent 34%),
        radial-gradient(circle at 90% 14%, rgba(125, 46, 46, 0.22), transparent 38%),
        linear-gradient(135deg, #17120f 0%, #251912 48%, #17120f 100%);
      line-height: 1.7;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: 0.08;
      background-image:
        linear-gradient(90deg, rgba(255,255,255,0.12) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
      background-size: 42px 42px;
      z-index: -1;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(23, 18, 15, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line);
    }

    .nav-bar {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex: 0 0 auto;
    }

    .logo-mark {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #22160f;
      background: radial-gradient(circle at 30% 25%, #ffe7a0, var(--gold) 58%, #a86e25);
      font-weight: 900;
      font-size: 23px;
      box-shadow: 0 0 0 5px rgba(215, 166, 74, 0.12);
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.2;
    }

    .brand-text strong {
      font-size: 16px;
      letter-spacing: 0.06em;
    }

    .brand-text span {
      color: var(--muted);
      font-size: 12px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 20px;
      font-size: 14px;
      color: #ead9bc;
    }

    .nav-links a {
      position: relative;
      padding: 8px 0;
      white-space: nowrap;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 4px;
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 16px;
      border-radius: 999px;
      color: #21150e;
      background: var(--gold-soft);
      font-weight: 700;
      box-shadow: 0 10px 28px rgba(215, 166, 74, 0.2);
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: rgba(255, 247, 232, 0.08);
      color: var(--text);
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      margin: 5px auto;
      background: var(--gold-soft);
      border-radius: 2px;
      transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .mobile-panel {
      display: none;
      padding: 0 0 18px;
    }

    .mobile-panel a {
      display: block;
      padding: 12px 0;
      color: #f4e5c8;
      border-top: 1px solid rgba(215, 166, 74, 0.14);
    }

    .hero {
      padding: 64px 0 36px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.78fr);
      gap: 32px;
      align-items: stretch;
    }

    .hero-copy {
      padding: clamp(28px, 5vw, 54px);
      border: 1px solid var(--line);
      border-radius: calc(var(--radius) + 8px);
      background:
        linear-gradient(140deg, rgba(255, 247, 232, 0.1), rgba(255, 247, 232, 0.04)),
        radial-gradient(circle at 100% 0%, rgba(215, 166, 74, 0.22), transparent 36%);
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
    }

    .hero-copy::after {
      content: "";
      position: absolute;
      right: -80px;
      bottom: -80px;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      border: 1px solid rgba(215, 166, 74, 0.3);
      box-shadow: inset 0 0 0 24px rgba(215, 166, 74, 0.04);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      color: #fee0a1;
      background: rgba(215, 166, 74, 0.12);
      border: 1px solid rgba(215, 166, 74, 0.24);
      font-size: 13px;
      margin-bottom: 18px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--gold-soft);
      box-shadow: 0 0 14px var(--gold-soft);
    }

    h1 {
      margin: 0;
      font-size: clamp(34px, 6vw, 64px);
      line-height: 1.08;
      letter-spacing: -0.03em;
      color: #fff3d8;
    }

    .hero-copy p {
      position: relative;
      z-index: 1;
      max-width: 680px;
      margin: 20px 0 0;
      color: #e6d2ad;
      font-size: 17px;
    }

    .hero-actions {
      position: relative;
      z-index: 1;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 999px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      cursor: pointer;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .btn-primary {
      color: #21150e;
      background: linear-gradient(135deg, #ffe2a0, var(--gold));
      box-shadow: 0 14px 30px rgba(215, 166, 74, 0.22);
    }

    .btn-secondary {
      color: #f9e8c8;
      background: rgba(255, 247, 232, 0.08);
      border-color: rgba(215, 166, 74, 0.32);
    }

    .hero-card {
      display: flex;
      flex-direction: column;
      gap: 18px;
      padding: 18px;
      border-radius: calc(var(--radius) + 8px);
      background: var(--panel);
      color: var(--text-dark);
      box-shadow: var(--shadow);
    }

    .phone-visual {
      border-radius: 24px;
      overflow: hidden;
      background: #ead9bd;
      aspect-ratio: 4 / 3;
      border: 1px solid rgba(90, 62, 28, 0.18);
    }

    .phone-visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hero-info {
      display: grid;
      gap: 12px;
    }

    .info-row {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      border-radius: 18px;
      background: #f4e6cd;
      border: 1px solid rgba(36, 25, 17, 0.08);
    }

    .info-icon {
      width: 34px;
      height: 34px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #25170d;
      background: var(--gold);
      font-weight: 900;
    }

    .info-row strong {
      display: block;
      color: #241911;
      line-height: 1.35;
    }

    .info-row span {
      display: block;
      color: var(--muted-dark);
      font-size: 14px;
      margin-top: 2px;
    }

    .section {
      padding: 42px 0;
    }

    .section-head {
      display: grid;
      gap: 10px;
      margin-bottom: 24px;
      max-width: 760px;
    }

    .section-head.center {
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-kicker {
      color: var(--gold-soft);
      font-size: 14px;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    h2 {
      margin: 0;
      font-size: clamp(26px, 4vw, 42px);
      line-height: 1.18;
      color: #fff0cf;
      letter-spacing: -0.02em;
    }

    .section-head p {
      margin: 0;
      color: #d9c6a5;
      font-size: 16px;
    }

    .light-panel {
      color: var(--text-dark);
      background:
        radial-gradient(circle at 8% 20%, rgba(215, 166, 74, 0.2), transparent 26%),
        linear-gradient(135deg, #fff8ea, #eedbb9);
      border-radius: calc(var(--radius) + 10px);
      padding: clamp(24px, 4vw, 40px);
      box-shadow: var(--shadow);
      border: 1px solid rgba(215, 166, 74, 0.22);
    }

    .light-panel h2,
    .light-panel h3 {
      color: #241911;
    }

    .light-panel .section-kicker {
      color: #8b5820;
    }

    .light-panel p {
      color: #5c4a35;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .service-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.56);
      border: 1px solid rgba(92, 74, 53, 0.12);
      transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      background: rgba(255, 255, 255, 0.82);
      box-shadow: 0 16px 34px rgba(72, 45, 18, 0.13);
    }

    .service-card h3 {
      margin: 12px 0 8px;
      font-size: 18px;
      line-height: 1.35;
    }

    .service-card p {
      margin: 0;
      font-size: 14px;
      color: #68553d;
    }

    .service-symbol {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #fff4d5;
      background: linear-gradient(135deg, var(--wine), #3c2119);
      font-weight: 900;
    }

    .solution-wrap {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
      gap: 22px;
      align-items: start;
    }

    .image-stack {
      display: grid;
      gap: 14px;
    }

    .image-frame {
      overflow: hidden;
      border-radius: 26px;
      border: 1px solid var(--line);
      background: #2b2018;
      box-shadow: var(--shadow);
    }

    .image-frame img {
      width: 100%;
      object-fit: cover;
      aspect-ratio: 16 / 11;
    }

    .process-list {
      display: grid;
      gap: 14px;
    }

    .process-item {
      display: grid;
      grid-template-columns: 52px minmax(0, 1fr);
      gap: 14px;
      padding: 18px;
      border-radius: 22px;
      background: rgba(255, 247, 232, 0.08);
      border: 1px solid rgba(215, 166, 74, 0.22);
    }

    .process-num {
      width: 52px;
      height: 52px;
      border-radius: 18px;
      display: grid;
      place-items: center;
      color: #22150d;
      background: var(--gold-soft);
      font-weight: 900;
      font-size: 18px;
    }

    .process-item h3 {
      margin: 0 0 5px;
      color: #fff0cf;
      font-size: 18px;
    }

    .process-item p {
      margin: 0;
      color: #d9c5a0;
      font-size: 15px;
    }

    .warranty-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .warranty-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 247, 232, 0.08);
      border: 1px solid rgba(215, 166, 74, 0.22);
    }

    .warranty-card h3 {
      margin: 0 0 8px;
      color: #ffe6ad;
      font-size: 18px;
    }

    .warranty-card p {
      margin: 0;
      color: #d9c5a0;
      font-size: 14px;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
      gap: 18px;
      align-items: stretch;
    }

    .contact-card {
      padding: clamp(22px, 4vw, 34px);
      border-radius: 28px;
      background: var(--panel);
      color: var(--text-dark);
      border: 1px solid rgba(215, 166, 74, 0.2);
      box-shadow: var(--shadow);
    }

    .contact-card h2 {
      color: #241911;
    }

    .contact-card p {
      color: #5d4a33;
      margin: 8px 0 0;
    }

    .contact-list {
      display: grid;
      gap: 12px;
      margin-top: 22px;
    }

    .contact-list a,
    .contact-list div {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      border-radius: 18px;
      color: #2a1d14;
      background: #f3e4c9;
      border: 1px solid rgba(36, 25, 17, 0.08);
    }

    .contact-list strong {
      display: block;
      line-height: 1.35;
    }

    .contact-list span {
      display: block;
      color: #6b573e;
      font-size: 14px;
      margin-top: 2px;
    }

    .qr-card {
      display: grid;
      gap: 14px;
      padding: 22px;
      border-radius: 28px;
      background: linear-gradient(145deg, rgba(49, 80, 67, 0.92), rgba(34, 24, 18, 0.96));
      border: 1px solid rgba(215, 166, 74, 0.22);
      box-shadow: var(--shadow);
    }

    .qr-box {
      padding: 14px;
      border-radius: 22px;
      background: #fff7e8;
    }

    .qr-box img {
      width: 100%;
      max-width: 260px;
      margin: 0 auto;
      border-radius: 14px;
    }

    .qr-card h3 {
      margin: 0;
      font-size: 22px;
      color: #fff0cf;
    }

    .qr-card p {
      margin: 0;
      color: #ddc9a6;
    }

    .link-panel {
      padding: 22px;
      border-radius: 26px;
      background: rgba(255, 247, 232, 0.08);
      border: 1px solid rgba(215, 166, 74, 0.22);
    }

    .link-panel h2 {
      font-size: clamp(24px, 3vw, 34px);
      margin-bottom: 14px;
    }

    .resource-links {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .resource-links a {
      display: flex;
      align-items: center;
      min-height: 50px;
      padding: 12px 14px;
      border-radius: 16px;
      color: #f4e4c7;
      background: rgba(255, 247, 232, 0.06);
      border: 1px solid rgba(215, 166, 74, 0.14);
      font-size: 14px;
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .resource-links a:hover {
      transform: translateY(-2px);
      background: rgba(215, 166, 74, 0.14);
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid rgba(215, 166, 74, 0.22);
      background: rgba(255, 247, 232, 0.08);
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 16px 18px;
      border: 0;
      background: transparent;
      color: #fff0cf;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      text-align: left;
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question b {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #241911;
      background: var(--gold-soft);
      transition: transform 0.25s ease;
      flex: 0 0 auto;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: #dcc8a4;
      font-size: 15px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .faq-item.open .faq-question b {
      transform: rotate(45deg);
    }

    .cta-strip {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 18px;
      align-items: center;
      padding: clamp(22px, 4vw, 34px);
      border-radius: 30px;
      color: #241911;
      background:
        linear-gradient(135deg, rgba(255, 231, 160, 0.96), rgba(215, 166, 74, 0.96)),
        radial-gradient(circle at 100% 10%, rgba(125, 46, 46, 0.16), transparent 34%);
      box-shadow: var(--shadow);
    }

    .cta-strip h2 {
      color: #241911;
      font-size: clamp(24px, 3vw, 36px);
    }

    .cta-strip p {
      margin: 8px 0 0;
      color: #61431e;
    }

    .cta-strip .btn {
      background: #241911;
      color: #fff1d2;
      white-space: nowrap;
    }

    .site-footer {
      margin-top: 38px;
      padding: 26px 0;
      color: #e9d8ba;
      background: #120e0c;
      border-top: 1px solid rgba(215, 166, 74, 0.22);
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
    }

    .footer-links {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: #f0d7a7;
      font-size: 14px;
    }

    .copyright {
      color: #bca987;
      font-size: 14px;
    }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 46px;
      height: 46px;
      border: 1px solid rgba(215, 166, 74, 0.4);
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #241911;
      background: var(--gold-soft);
      box-shadow: 0 12px 28px rgba(0,0,0,0.26);
      opacity: 0;
      pointer-events: none;
      transform: translateY(10px);
      transition: opacity 0.25s ease, transform 0.25s ease;
      cursor: pointer;
      z-index: 15;
    }

    .back-top.show {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 980px) {
      .nav-links,
      .nav-action {
        display: none;
      }

      .menu-toggle {
        display: block;
      }

      .mobile-panel.open {
        display: block;
      }

      .hero {
        padding-top: 34px;
      }

      .hero-grid,
      .solution-wrap,
      .contact-grid {
        grid-template-columns: 1fr;
      }

      .service-grid,
      .warranty-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .resource-links {
        grid-template-columns: 1fr;
      }

      .cta-strip {
        grid-template-columns: 1fr;
      }

      .cta-strip .btn {
        justify-self: start;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .nav-bar {
        min-height: 66px;
      }

      .brand-text span {
        display: none;
      }

      .hero-copy {
        padding: 26px 20px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }

      .section {
        padding: 34px 0;
      }

      .service-grid,
      .warranty-grid {
        grid-template-columns: 1fr;
      }

      .process-item {
        grid-template-columns: 44px minmax(0, 1fr);
      }

      .process-num {
        width: 44px;
        height: 44px;
        border-radius: 14px;
      }

      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
      }

      .footer-links {
        align-items: flex-start;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        transition: none !important;
        animation: none !important;
      }

      .reveal {
        opacity: 1;
        transform: none;
      }
    }