:root {
      --bg: #f6f8fb;
      --panel: #ffffff;
      --panel-soft: #eef4ff;
      --text: #1d2733;
      --muted: #5d6b7c;
      --line: #dfe7f2;
      --primary: #1263d6;
      --primary-dark: #0b4ba6;
      --accent: #ff8a3d;
      --green: #20a66a;
      --shadow: 0 18px 45px rgba(18, 42, 78, 0.10);
      --radius-lg: 24px;
      --radius-md: 16px;
      --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(18, 99, 214, 0.10), transparent 28%),
        radial-gradient(circle at 88% 10%, rgba(255, 138, 61, 0.12), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, var(--bg) 48%, #f4f7fb 100%);
      line-height: 1.65;
      overflow-x: hidden;
    }

    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: 50;
      background: rgba(248, 251, 255, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(223, 231, 242, 0.92);
    }

    .nav {
      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: 14px;
      display: grid;
      place-items: center;
      color: #ffffff;
      font-size: 24px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), #2b86ff);
      box-shadow: 0 12px 28px rgba(18, 99, 214, 0.24);
    }

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

    .brand-text strong {
      font-size: 17px;
      letter-spacing: 0.02em;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 8px;
      flex: 1 1 auto;
    }

    .nav-links a {
      padding: 10px 12px;
      color: #334155;
      font-size: 14px;
      border-radius: 999px;
      transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .nav-links a:hover {
      background: #eaf2ff;
      color: var(--primary);
      transform: translateY(-1px);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 16px;
      border-radius: 999px;
      color: #ffffff;
      background: var(--primary);
      font-weight: 700;
      font-size: 14px;
      box-shadow: 0 10px 24px rgba(18, 99, 214, 0.22);
      transition: transform 0.2s ease, background 0.2s ease;
      flex: 0 0 auto;
    }

    .nav-cta:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      border: 0;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: #eaf2ff;
      color: var(--primary);
      font-size: 22px;
      cursor: pointer;
    }

    main {
      padding-bottom: 28px;
    }

    .hero {
      padding: 54px 0 34px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary-dark);
      background: #e7f0ff;
      border: 1px solid #cfe0fa;
      padding: 7px 12px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 5px rgba(32, 166, 106, 0.12);
    }

    h1 {
      margin: 0;
      font-size: clamp(32px, 6vw, 56px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #111827;
    }

    .hero-lead {
      margin: 18px 0 0;
      max-width: 650px;
      color: var(--muted);
      font-size: clamp(16px, 2.4vw, 18px);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 18px;
      border-radius: 14px;
      font-weight: 800;
      font-size: 15px;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), #2b86ff);
      box-shadow: 0 16px 32px rgba(18, 99, 214, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 20px 38px rgba(18, 99, 214, 0.32);
    }

    .btn-secondary {
      color: #17324d;
      background: #ffffff;
      border-color: var(--line);
      box-shadow: 0 12px 28px rgba(18, 42, 78, 0.08);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      background: #f3f7ff;
    }

    .quick-facts {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 26px;
      max-width: 720px;
    }

    .fact {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(223, 231, 242, 0.88);
      border-radius: 16px;
      padding: 14px;
      box-shadow: 0 12px 28px rgba(18, 42, 78, 0.06);
    }

    .fact strong {
      display: block;
      color: #111827;
      font-size: 15px;
      margin-bottom: 3px;
    }

    .fact span {
      color: var(--muted);
      font-size: 13px;
    }

    .hero-visual {
      position: relative;
      border-radius: 30px;
      background: linear-gradient(145deg, #ffffff, #edf5ff);
      border: 1px solid rgba(207, 224, 250, 0.9);
      padding: 18px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-visual::before {
      content: "";
      position: absolute;
      inset: -80px -70px auto auto;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: rgba(18, 99, 214, 0.11);
    }

    .phone-frame {
      position: relative;
      z-index: 1;
      display: grid;
      gap: 14px;
    }

    .phone-image {
      border-radius: 22px;
      overflow: hidden;
      background: #dfe8f5;
      aspect-ratio: 4 / 3;
      border: 1px solid #d7e3f2;
    }

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

    .visual-note {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 12px;
      align-items: center;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 18px;
      padding: 16px;
    }

    .visual-note strong {
      display: block;
      color: #111827;
      font-size: 16px;
    }

    .visual-note span {
      display: block;
      color: var(--muted);
      font-size: 13px;
      margin-top: 2px;
    }

    .badge {
      color: #7a3b08;
      background: #fff0df;
      border: 1px solid #ffd8ad;
      border-radius: 999px;
      padding: 8px 10px;
      font-weight: 800;
      font-size: 13px;
      white-space: nowrap;
    }

    section {
      padding: 34px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 18px;
      margin-bottom: 18px;
    }

    .section-head h2 {
      margin: 0;
      font-size: clamp(24px, 3.4vw, 36px);
      line-height: 1.18;
      letter-spacing: -0.02em;
      color: #111827;
    }

    .section-head p {
      margin: 8px 0 0;
      color: var(--muted);
      max-width: 660px;
    }

    .section-kicker {
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 7px;
    }

    .panel {
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid rgba(223, 231, 242, 0.95);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
    }

    .prep-layout {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 18px;
      align-items: stretch;
    }

    .prep-main {
      padding: 24px;
      background: linear-gradient(145deg, #ffffff, #f1f6ff);
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
    }

    .prep-main h3 {
      margin: 0 0 12px;
      font-size: 22px;
      color: #111827;
    }

    .check-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .check-list li {
      display: grid;
      grid-template-columns: 28px 1fr;
      gap: 10px;
      align-items: start;
      color: #334155;
    }

    .check-list li::before {
      content: "✓";
      width: 28px;
      height: 28px;
      border-radius: 9px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: var(--green);
      font-weight: 900;
      line-height: 1;
      margin-top: 1px;
    }

    .prep-cards {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }

    .mini-card {
      padding: 18px;
      border-radius: 18px;
      background: #ffffff;
      border: 1px solid var(--line);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .mini-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 34px rgba(18, 42, 78, 0.11);
    }

    .mini-card h3 {
      margin: 0 0 8px;
      font-size: 17px;
      color: #111827;
    }

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

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

    .service-card {
      padding: 20px;
      border-radius: 20px;
      background: #ffffff;
      border: 1px solid var(--line);
      min-height: 148px;
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: #b9d2f5;
      box-shadow: 0 18px 34px rgba(18, 42, 78, 0.10);
    }

    .service-icon {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: var(--primary);
      background: #eaf2ff;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .service-card h3 {
      margin: 0 0 7px;
      font-size: 17px;
      color: #111827;
    }

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

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

    .steps {
      padding: 24px;
    }

    .step-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 14px;
    }

    .step-list li {
      display: grid;
      grid-template-columns: 44px 1fr;
      gap: 13px;
      align-items: start;
    }

    .step-no {
      width: 44px;
      height: 44px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: #1d2733;
      font-weight: 900;
    }

    .step-list h3 {
      margin: 0 0 4px;
      font-size: 17px;
      color: #111827;
    }

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

    .scene-card {
      padding: 24px;
      background: linear-gradient(145deg, #17324d, #0f5cc4);
      color: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      position: relative;
      min-height: 100%;
    }

    .scene-card::after {
      content: "";
      position: absolute;
      width: 210px;
      height: 210px;
      border-radius: 50%;
      right: -80px;
      bottom: -90px;
      background: rgba(255, 255, 255, 0.13);
    }

    .scene-card h3 {
      position: relative;
      margin: 0 0 12px;
      font-size: 22px;
      color: #ffffff;
    }

    .scene-card p {
      position: relative;
      margin: 0 0 16px;
      color: rgba(255, 255, 255, 0.88);
    }

    .scene-list {
      position: relative;
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .scene-list li {
      padding: 12px 14px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: #ffffff;
    }

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

    .warranty-card {
      padding: 18px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 18px;
    }

    .warranty-card h3 {
      margin: 0 0 8px;
      color: #111827;
      font-size: 17px;
    }

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

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 0.72fr;
      gap: 18px;
      align-items: stretch;
    }

    .contact-card {
      padding: 24px;
    }

    .info-list {
      display: grid;
      gap: 12px;
      margin-top: 14px;
    }

    .info-row {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 12px;
      padding: 14px;
      border-radius: 16px;
      background: #f6f9fd;
      border: 1px solid #e4ecf7;
    }

    .info-row strong {
      color: #111827;
    }

    .info-row span,
    .info-row a {
      color: #334155;
    }

    .map-link {
      color: #0066cc;
      text-decoration: none;
      font-weight: 800;
    }

    .qr-card {
      padding: 22px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      display: grid;
      align-content: start;
      gap: 14px;
    }

    .qr-card h3 {
      margin: 0;
      font-size: 20px;
      color: #111827;
    }

    .qr-box {
      border-radius: 20px;
      padding: 14px;
      background: #f6f9fd;
      border: 1px dashed #bfd2ee;
    }

    .qr-box img {
      width: min(100%, 280px);
      margin: 0 auto;
      border-radius: 14px;
      background: #ffffff;
    }

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

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

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 18px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      border: 0;
      background: #ffffff;
      color: #111827;
      text-align: left;
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 800;
    }

    .faq-question span {
      flex: 1 1 auto;
    }

    .faq-question i {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: #eaf2ff;
      color: var(--primary);
      font-style: normal;
      flex: 0 0 auto;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
    }

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

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

    .links-panel {
      padding: 22px;
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
    }

    .links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px 16px;
      margin-top: 12px;
    }

    .links-grid a {
      color: #31506f;
      background: #f6f9fd;
      border: 1px solid #e4ecf7;
      border-radius: 14px;
      padding: 11px 12px;
      font-size: 14px;
      transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
    }

    .links-grid a:hover {
      color: var(--primary);
      background: #eaf2ff;
      transform: translateY(-1px);
    }

    .site-footer {
      background: #152235;
      color: #d9e5f5;
      padding: 26px 0;
      margin-top: 10px;
    }

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

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .footer-brand .logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      font-size: 21px;
      box-shadow: none;
    }

    .footer-brand strong {
      color: #ffffff;
      display: block;
      font-size: 15px;
    }

    .footer-brand span {
      color: #aebed2;
      display: block;
      font-size: 13px;
    }

    .footer-copy {
      color: #aebed2;
      font-size: 13px;
      text-align: right;
    }

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

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

    @keyframes floatSoft {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-8px);
      }
    }

    .hero-visual {
      animation: floatSoft 6s ease-in-out infinite;
    }

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

      .menu-toggle {
        display: grid;
        place-items: center;
      }

      .nav-links.open {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 72px;
        display: grid;
        gap: 6px;
        padding: 14px;
        background: #ffffff;
        border: 1px solid var(--line);
        border-radius: 18px;
        box-shadow: var(--shadow);
      }

      .nav-links.open a {
        padding: 12px 14px;
        border-radius: 12px;
      }

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

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

      .section-head {
        align-items: flex-start;
        flex-direction: column;
      }

      .hero {
        padding-top: 38px;
      }

      .hero-visual {
        animation: none;
      }
    }

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

      .nav {
        min-height: 66px;
      }

      .brand-text span {
        display: none;
      }

      .hero {
        padding: 30px 0 24px;
      }

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

      .btn {
        width: 100%;
      }

      .quick-facts,
      .prep-cards,
      .services-grid,
      .warranty-grid,
      .links-grid {
        grid-template-columns: 1fr;
      }

      .visual-note {
        grid-template-columns: 1fr;
      }

      .info-row {
        grid-template-columns: 1fr;
        gap: 4px;
      }

      section {
        padding: 26px 0;
      }

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

      .footer-copy {
        text-align: left;
      }
    }

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

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

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