:root {
      --bg: #f6efe2;
      --bg-deep: #efe1c9;
      --card: #fffaf0;
      --ink: #211b15;
      --muted: #66584a;
      --brass: #b77a2b;
      --brass-dark: #7a4d1c;
      --copper: #c86535;
      --line: rgba(91, 62, 31, 0.18);
      --shadow: 0 18px 45px rgba(77, 50, 24, 0.13);
      --radius: 22px;
      --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(--ink);
      background:
        radial-gradient(circle at 8% 10%, rgba(199, 120, 45, 0.18), transparent 26%),
        radial-gradient(circle at 88% 18%, rgba(92, 66, 36, 0.12), transparent 28%),
        linear-gradient(135deg, #fbf6ec 0%, var(--bg) 42%, #efe0c7 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: 0.18;
      background-image:
        linear-gradient(90deg, rgba(88, 60, 31, 0.18) 1px, transparent 1px),
        linear-gradient(rgba(88, 60, 31, 0.14) 1px, transparent 1px);
      background-size: 34px 34px;
      z-index: -2;
    }

    body::after {
      content: "";
      position: fixed;
      width: 360px;
      height: 360px;
      right: -160px;
      bottom: -120px;
      border: 1px solid rgba(122, 77, 28, 0.24);
      border-radius: 50%;
      box-shadow: inset 0 0 0 26px rgba(183, 122, 43, 0.05), inset 0 0 0 58px rgba(200, 101, 53, 0.04);
      pointer-events: none;
      z-index: -1;
      animation: slowTurn 26s linear infinite;
    }

    a {
      color: var(--brass-dark);
      text-decoration: none;
    }

    a:hover {
      color: var(--copper);
    }

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

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

    header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(251, 246, 236, 0.88);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--line);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--ink);
      font-weight: 800;
      letter-spacing: 0.08em;
      white-space: nowrap;
    }

    .logo-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #fff8e8;
      background:
        radial-gradient(circle at 35% 30%, #dca45a, #9c6124 58%, #513011 100%);
      border: 2px solid rgba(81, 48, 17, 0.45);
      box-shadow: inset 0 0 0 4px rgba(255, 239, 203, 0.18), 0 8px 18px rgba(92, 56, 21, 0.22);
      font-size: 22px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      font-size: 15px;
    }

    .nav-links a {
      color: #3a2d21;
      font-weight: 650;
      position: relative;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -7px;
      width: 0;
      height: 2px;
      background: var(--brass);
      transition: width 0.25s ease;
    }

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

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 17px;
      color: #fff8e8;
      background: linear-gradient(135deg, #7e4d1d, #c7772c);
      border-radius: 999px;
      font-weight: 800;
      box-shadow: 0 10px 24px rgba(124, 78, 28, 0.2);
    }

    .menu-toggle {
      display: none;
      border: 1px solid var(--line);
      background: #fff7e8;
      color: var(--ink);
      border-radius: 12px;
      padding: 9px 12px;
      font-weight: 800;
      cursor: pointer;
    }

    main {
      position: relative;
    }

    section {
      padding: 58px 0;
    }

    .hero {
      padding: 74px 0 58px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.06fr) minmax(320px, 0.94fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      width: fit-content;
      padding: 7px 12px;
      color: #5d3912;
      background: rgba(255, 248, 232, 0.78);
      border: 1px solid rgba(183, 122, 43, 0.28);
      border-radius: 999px;
      font-weight: 750;
      font-size: 14px;
      box-shadow: 0 8px 22px rgba(88, 57, 28, 0.08);
    }

    .eyebrow::before {
      content: "";
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--copper);
      box-shadow: 0 0 0 6px rgba(200, 101, 53, 0.13);
    }

    h1 {
      margin: 20px 0 16px;
      font-size: clamp(34px, 7vw, 62px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #1f1710;
    }

    .lead {
      margin: 0;
      max-width: 720px;
      color: var(--muted);
      font-size: 18px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 12px 20px;
      border-radius: 14px;
      border: 1px solid transparent;
      font-weight: 850;
      transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
    }

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

    .btn-primary {
      color: #fff8e8;
      background: linear-gradient(135deg, #6a3e16, #b9732b 55%, #d28b3f);
      box-shadow: 0 16px 32px rgba(126, 77, 24, 0.22);
    }

    .btn-secondary {
      color: #3a2512;
      background: rgba(255, 250, 240, 0.72);
      border-color: rgba(122, 77, 28, 0.24);
    }

    .quick-note {
      margin-top: 22px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      color: #5d4e40;
      font-size: 14px;
    }

    .quick-note span {
      padding: 7px 11px;
      border: 1px dashed rgba(122, 77, 28, 0.28);
      border-radius: 999px;
      background: rgba(255, 248, 232, 0.55);
    }

    .device-panel {
      position: relative;
      padding: 18px;
      background: linear-gradient(145deg, rgba(255, 250, 240, 0.88), rgba(238, 219, 184, 0.84));
      border: 1px solid rgba(122, 77, 28, 0.22);
      border-radius: 32px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .device-panel::before,
    .device-panel::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      border: 1px solid rgba(122, 77, 28, 0.24);
      pointer-events: none;
    }

    .device-panel::before {
      width: 170px;
      height: 170px;
      right: -56px;
      top: -58px;
      box-shadow: inset 0 0 0 18px rgba(183, 122, 43, 0.06);
    }

    .device-panel::after {
      width: 118px;
      height: 118px;
      left: -38px;
      bottom: -36px;
      box-shadow: inset 0 0 0 12px rgba(200, 101, 53, 0.05);
    }

    .phone-frame {
      position: relative;
      z-index: 1;
      padding: 14px;
      border-radius: 26px;
      background: #2b241c;
      box-shadow: inset 0 0 0 2px rgba(255, 244, 214, 0.18);
    }

    .phone-frame img {
      width: 100%;
      border-radius: 18px;
      object-fit: contain;
      background: #f8f0df;
    }

    .panel-strip {
      position: relative;
      z-index: 1;
      margin-top: 16px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .gauge {
      padding: 12px;
      border-radius: 16px;
      background: rgba(255, 250, 240, 0.72);
      border: 1px solid rgba(122, 77, 28, 0.18);
      text-align: center;
    }

    .gauge strong {
      display: block;
      color: #3a2512;
      font-size: 15px;
    }

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

    .section-title {
      margin-bottom: 26px;
      display: grid;
      gap: 10px;
    }

    .section-title h2 {
      margin: 0;
      font-size: clamp(26px, 4.6vw, 42px);
      line-height: 1.18;
      color: #251b12;
      letter-spacing: -0.03em;
    }

    .section-title p {
      margin: 0;
      max-width: 780px;
      color: var(--muted);
      font-size: 16px;
    }

    .service-layout {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 22px;
      align-items: start;
    }

    .service-callout {
      padding: 28px;
      border-radius: var(--radius);
      background:
        linear-gradient(135deg, rgba(53, 38, 24, 0.94), rgba(118, 74, 28, 0.92)),
        radial-gradient(circle at top right, rgba(210, 139, 63, 0.32), transparent 36%);
      color: #fff4dc;
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }

    .service-callout h3 {
      margin: 0 0 12px;
      font-size: 24px;
      color: #fff7e8;
    }

    .service-callout p {
      margin: 0;
      color: #ead8ba;
    }

    .service-callout ul {
      margin: 20px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 11px;
    }

    .service-callout li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #fff2d7;
    }

    .service-callout li::before {
      content: "";
      flex: 0 0 10px;
      width: 10px;
      height: 10px;
      margin-top: 9px;
      border-radius: 50%;
      background: #dca45a;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .service-card,
    .solution-card,
    .warranty-card,
    .faq-item,
    .contact-card,
    .link-card {
      background: rgba(255, 250, 240, 0.78);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: 0 14px 32px rgba(77, 50, 24, 0.08);
    }

    .service-card {
      padding: 20px;
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 36px rgba(77, 50, 24, 0.14);
    }

    .service-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #2a1c10;
    }

    .service-card p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .solution-band {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .solution-card {
      padding: 22px;
      position: relative;
      overflow: hidden;
    }

    .solution-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 22px;
      right: 22px;
      height: 4px;
      border-radius: 0 0 6px 6px;
      background: linear-gradient(90deg, var(--brass), var(--copper));
    }

    .solution-card h3 {
      margin: 8px 0 10px;
      font-size: 19px;
    }

    .solution-card p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .process {
      margin-top: 18px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .process-step {
      padding: 18px;
      border-radius: 18px;
      border: 1px solid rgba(122, 77, 28, 0.18);
      background: linear-gradient(180deg, rgba(255, 250, 240, 0.76), rgba(239, 225, 201, 0.72));
    }

    .process-step strong {
      display: inline-grid;
      place-items: center;
      width: 34px;
      height: 34px;
      margin-bottom: 10px;
      border-radius: 50%;
      background: #3d2815;
      color: #ffe9bd;
      font-size: 14px;
    }

    .process-step h3 {
      margin: 0 0 6px;
      font-size: 17px;
    }

    .process-step p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .warranty-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .warranty-card {
      padding: 20px;
    }

    .warranty-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #2a1c10;
    }

    .warranty-card p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      align-items: stretch;
    }

    .contact-card {
      padding: 24px;
    }

    .contact-card h3 {
      margin: 0 0 14px;
      font-size: 22px;
    }

    .info-list {
      padding: 0;
      margin: 0;
      list-style: none;
      display: grid;
      gap: 12px;
    }

    .info-list li {
      padding: 12px 14px;
      border-radius: 15px;
      background: rgba(239, 225, 201, 0.55);
      color: #3a2d21;
    }

    .info-list strong {
      color: #201710;
      margin-right: 6px;
    }

    .qr-row {
      display: grid;
      grid-template-columns: 170px 1fr;
      gap: 16px;
      align-items: center;
    }

    .qr-box {
      padding: 10px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid rgba(122, 77, 28, 0.22);
      box-shadow: 0 10px 24px rgba(77, 50, 24, 0.1);
    }

    .qr-box img {
      border-radius: 12px;
    }

    .map-link {
      display: inline-flex;
      margin-top: 14px;
      padding: 10px 13px;
      border-radius: 12px;
      color: #503012;
      background: rgba(220, 164, 90, 0.18);
      border: 1px solid rgba(183, 122, 43, 0.25);
      font-weight: 800;
    }

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

    .faq-item {
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      gap: 14px;
      align-items: center;
      padding: 18px 20px;
      border: 0;
      background: transparent;
      color: var(--ink);
      font-size: 17px;
      font-weight: 850;
      text-align: left;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question i {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(183, 122, 43, 0.16);
      color: #6a3e16;
      font-style: normal;
      transition: transform 0.22s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.28s ease;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 20px 18px;
      color: var(--muted);
    }

    .faq-item.active .faq-question i {
      transform: rotate(45deg);
    }

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

    .link-card {
      padding: 18px;
      min-height: 100%;
      transition: transform 0.22s ease, background 0.22s ease;
    }

    .link-card:hover {
      transform: translateY(-3px);
      background: rgba(255, 247, 232, 0.94);
    }

    .link-card a {
      display: block;
      color: #3a2512;
      font-weight: 800;
      line-height: 1.55;
    }

    .cta-panel {
      padding: 32px;
      border-radius: 28px;
      background:
        linear-gradient(135deg, rgba(255, 250, 240, 0.92), rgba(239, 225, 201, 0.86)),
        radial-gradient(circle at 90% 0%, rgba(200, 101, 53, 0.18), transparent 34%);
      border: 1px solid rgba(122, 77, 28, 0.2);
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      align-items: center;
    }

    .cta-panel h2 {
      margin: 0 0 8px;
      font-size: clamp(24px, 4vw, 36px);
    }

    .cta-panel p {
      margin: 0;
      color: var(--muted);
    }

    footer {
      padding: 26px 0;
      background: #2b2117;
      color: #f8ead0;
      border-top: 1px solid rgba(255, 239, 203, 0.12);
    }

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

    .footer-inner a {
      color: #ffe0a8;
      font-weight: 750;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff4dc;
      font-weight: 850;
    }

    .footer-copy {
      color: #dac5a4;
      font-size: 14px;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

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

    @keyframes slowTurn {
      from {
        transform: rotate(0deg);
      }
      to {
        transform: rotate(360deg);
      }
    }

    @media (max-width: 940px) {
      .menu-toggle {
        display: inline-flex;
      }

      .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        border-radius: 18px;
        border: 1px solid var(--line);
        background: #fff8e8;
        box-shadow: var(--shadow);
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        padding: 12px;
      }

      .nav-links a::after {
        display: none;
      }

      .nav-cta {
        margin-top: 6px;
      }

      .hero-grid,
      .service-layout,
      .contact-layout,
      .cta-panel {
        grid-template-columns: 1fr;
      }

      .solution-band,
      .warranty-grid,
      .related-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .process {
        grid-template-columns: repeat(2, 1fr);
      }
    }

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

      section {
        padding: 42px 0;
      }

      .hero {
        padding-top: 48px;
      }

      .service-grid,
      .solution-band,
      .warranty-grid,
      .process,
      .related-grid,
      .panel-strip,
      .qr-row {
        grid-template-columns: 1fr;
      }

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

      .btn {
        width: 100%;
      }

      .contact-card,
      .service-callout,
      .cta-panel {
        padding: 22px;
      }

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

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

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

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