:root {
      --ink: #142033;
      --muted: #65738a;
      --deep: #17365f;
      --deep-2: #234e7f;
      --accent: #b88a4a;
      --accent-soft: #f3e6d3;
      --line: #d9e2ee;
      --card: rgba(255,255,255,0.88);
      --paper: #f6f8fb;
      --wash: #eef4fb;
      --shadow: 0 18px 45px rgba(23,54,95,0.12);
      --radius-lg: 28px;
      --radius-md: 18px;
      --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 12% 8%, rgba(184,138,74,0.13), transparent 28%),
        radial-gradient(circle at 90% 18%, rgba(35,78,127,0.16), transparent 32%),
        linear-gradient(180deg, #f8fbff 0%, #eef4fb 42%, #f8fafc 100%);
      line-height: 1.7;
      overflow-x: hidden;
    }

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

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

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(248,251,255,0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(217,226,238,0.8);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

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

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 800;
      font-size: 22px;
      background: linear-gradient(135deg, var(--deep), #071d37);
      box-shadow: 0 12px 26px rgba(23,54,95,0.22);
    }

    .brand-text {
      display: grid;
      gap: 1px;
    }

    .brand-text strong {
      font-size: 17px;
      letter-spacing: 0.03em;
      color: var(--ink);
    }

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

    .nav-menu {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 8px;
      margin-left: auto;
    }

    .nav-menu a {
      padding: 9px 12px;
      border-radius: 999px;
      color: #2e405a;
      font-size: 14px;
      transition: background .25s ease, color .25s ease, transform .25s ease;
    }

    .nav-menu a:hover {
      background: rgba(23,54,95,0.08);
      color: var(--deep);
      transform: translateY(-1px);
    }

    .nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 16px;
      border-radius: 999px;
      color: #fff;
      background: linear-gradient(135deg, var(--deep), var(--deep-2));
      box-shadow: 0 12px 24px rgba(23,54,95,0.2);
      font-size: 14px;
      white-space: nowrap;
      transition: transform .25s ease, box-shadow .25s ease;
    }

    .nav-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 32px rgba(23,54,95,0.24);
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #fff;
      color: var(--deep);
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 4px auto;
      background: currentColor;
      border-radius: 2px;
    }

    main {
      display: block;
    }

    .hero {
      padding: 58px 0 42px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.03fr) minmax(320px, 0.97fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: fit-content;
      padding: 7px 12px;
      border-radius: 999px;
      color: var(--deep);
      background: rgba(255,255,255,0.72);
      border: 1px solid rgba(217,226,238,0.9);
      font-size: 13px;
      font-weight: 650;
      box-shadow: 0 8px 22px rgba(23,54,95,0.06);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 5px rgba(184,138,74,0.14);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(32px, 5vw, 56px);
      line-height: 1.12;
      letter-spacing: -0.04em;
      color: #10213a;
    }

    .hero-lead {
      margin: 0;
      max-width: 640px;
      color: #42516a;
      font-size: 17px;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 12px 18px;
      border-radius: 14px;
      font-weight: 700;
      font-size: 15px;
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--deep), #0d2647);
      box-shadow: 0 16px 30px rgba(23,54,95,0.22);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 20px 38px rgba(23,54,95,0.28);
    }

    .btn-soft {
      color: var(--deep);
      background: rgba(255,255,255,0.82);
      border: 1px solid rgba(217,226,238,0.95);
    }

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

    .hero-note {
      margin-top: 20px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      max-width: 620px;
    }

    .note-item {
      padding: 12px 13px;
      border-radius: 16px;
      background: rgba(255,255,255,0.68);
      border: 1px solid rgba(217,226,238,0.85);
      color: #34445d;
      font-size: 13px;
    }

    .visual-card {
      position: relative;
      padding: 18px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(145deg, rgba(255,255,255,0.92), rgba(238,244,251,0.86));
      border: 1px solid rgba(217,226,238,0.92);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .visual-card::before {
      content: "";
      position: absolute;
      width: 180px;
      height: 180px;
      right: -68px;
      top: -68px;
      border-radius: 50%;
      background: rgba(184,138,74,0.18);
      animation: floatGlow 8s ease-in-out infinite;
    }

    .image-frame {
      position: relative;
      z-index: 1;
      aspect-ratio: 4 / 3;
      border-radius: 22px;
      overflow: hidden;
      background: #eaf0f8;
      border: 1px solid rgba(217,226,238,0.9);
      display: grid;
      place-items: center;
    }

    .image-frame img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      background: #f8fbff;
    }

    .mini-panel {
      position: relative;
      z-index: 2;
      margin: -34px 18px 0;
      padding: 16px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 12px;
      align-items: center;
      border-radius: 20px;
      background: rgba(255,255,255,0.94);
      border: 1px solid rgba(217,226,238,0.95);
      box-shadow: 0 16px 34px rgba(23,54,95,0.13);
    }

    .mini-panel strong {
      display: block;
      color: var(--ink);
      font-size: 16px;
      line-height: 1.35;
    }

    .mini-panel span {
      display: block;
      color: var(--muted);
      font-size: 13px;
      margin-top: 3px;
    }

    .status-dot {
      width: 44px;
      height: 44px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--accent-soft);
      color: #7a5525;
      font-weight: 800;
    }

    .section {
      padding: 46px 0;
    }

    .section-head {
      max-width: 780px;
      margin-bottom: 24px;
    }

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

    h2 {
      margin: 8px 0 10px;
      font-size: clamp(25px, 3.2vw, 38px);
      line-height: 1.22;
      letter-spacing: -0.03em;
      color: #10213a;
    }

    .section-head p {
      margin: 0;
      color: #4f5f77;
      font-size: 16px;
    }

    .about-wrap {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
      gap: 24px;
      align-items: start;
    }

    .info-panel {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(244,248,252,0.88));
      border: 1px solid rgba(217,226,238,0.92);
      box-shadow: var(--shadow);
    }

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

    .info-list li {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 12px;
      padding-bottom: 12px;
      border-bottom: 1px dashed rgba(101,115,138,0.28);
      color: #33435b;
    }

    .info-list li:last-child {
      padding-bottom: 0;
      border-bottom: none;
    }

    .info-list span {
      color: var(--muted);
      font-weight: 650;
    }

    .about-text {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,0.64);
      border: 1px solid rgba(217,226,238,0.85);
    }

    .about-text p {
      margin: 0 0 14px;
      color: #405069;
    }

    .about-text p:last-child {
      margin-bottom: 0;
    }

    .solution-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .solution-card {
      padding: 20px;
      border-radius: 22px;
      background: var(--card);
      border: 1px solid rgba(217,226,238,0.95);
      box-shadow: 0 12px 28px rgba(23,54,95,0.08);
      transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }

    .solution-card:hover {
      transform: translateY(-5px);
      border-color: rgba(184,138,74,0.48);
      box-shadow: 0 18px 40px rgba(23,54,95,0.14);
    }

    .icon-badge {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--deep), var(--deep-2));
      font-weight: 800;
      margin-bottom: 14px;
    }

    h3 {
      margin: 0 0 8px;
      font-size: 18px;
      line-height: 1.35;
      color: #15253d;
    }

    .solution-card p {
      margin: 0;
      color: #59687f;
      font-size: 14px;
    }

    .process {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
      gap: 22px;
      align-items: start;
    }

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

    .steps li {
      display: grid;
      grid-template-columns: 38px 1fr;
      gap: 14px;
      padding: 16px;
      border-radius: 20px;
      background: rgba(255,255,255,0.82);
      border: 1px solid rgba(217,226,238,0.92);
    }

    .step-num {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: var(--deep);
      background: var(--accent-soft);
      font-weight: 850;
    }

    .steps strong {
      display: block;
      color: #15253d;
      margin-bottom: 3px;
    }

    .steps span {
      color: #5a6980;
      font-size: 14px;
    }

    .gallery {
      display: grid;
      gap: 12px;
    }

    .gallery .image-frame {
      aspect-ratio: 16 / 10;
      border-radius: 20px;
      box-shadow: 0 12px 28px rgba(23,54,95,0.1);
    }

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

    .warranty-card {
      padding: 20px;
      border-radius: 22px;
      background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(247,250,253,0.88));
      border: 1px solid rgba(217,226,238,0.94);
    }

    .warranty-card strong {
      display: block;
      color: var(--deep);
      font-size: 18px;
      margin-bottom: 8px;
    }

    .warranty-card p {
      margin: 0;
      color: #53637a;
      font-size: 14px;
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255,255,255,0.86);
      border: 1px solid rgba(217,226,238,0.96);
      overflow: hidden;
    }

    .faq-btn {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 20px;
      border: none;
      background: transparent;
      color: #15253d;
      text-align: left;
      font: inherit;
      font-weight: 750;
      cursor: pointer;
    }

    .faq-btn::after {
      content: "+";
      width: 28px;
      height: 28px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--deep);
      background: var(--wash);
      font-weight: 900;
      transition: transform .25s ease;
    }

    .faq-item.active .faq-btn::after {
      transform: rotate(45deg);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height .3s ease;
    }

    .faq-content p {
      margin: 0;
      padding: 0 20px 18px;
      color: #53637a;
      font-size: 15px;
    }

    .links-box {
      padding: 24px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(23,54,95,0.96), rgba(12,32,58,0.96)),
        linear-gradient(180deg, #17365f, #0e2849);
      color: #fff;
      box-shadow: var(--shadow);
    }

    .links-box h2 {
      color: #fff;
      margin-top: 0;
    }

    .links-box p {
      color: rgba(255,255,255,0.78);
      margin: 0 0 18px;
    }

    .resource-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .resource-links a {
      display: inline-flex;
      padding: 9px 12px;
      border-radius: 999px;
      color: #f8fbff;
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.16);
      font-size: 13px;
      transition: background .25s ease, transform .25s ease;
    }

    .resource-links a:hover {
      background: rgba(255,255,255,0.18);
      transform: translateY(-2px);
    }

    .site-footer {
      margin-top: 10px;
      padding: 28px 0;
      background: #0e223d;
      color: #e8eef7;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 20px;
      align-items: center;
    }

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

    .footer-brand .brand-mark {
      box-shadow: none;
      background: linear-gradient(135deg, #f3e6d3, #b88a4a);
      color: #10213a;
    }

    .footer-brand strong {
      display: block;
      color: #fff;
    }

    .footer-brand span,
    .footer-copy {
      color: rgba(232,238,247,0.72);
      font-size: 13px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 12px;
    }

    .footer-links a {
      color: #e8eef7;
      font-size: 13px;
      border-bottom: 1px solid transparent;
    }

    .footer-links a:hover {
      border-bottom-color: #e8eef7;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity .7s ease, transform .7s ease;
    }

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

    @keyframes floatGlow {
      0%, 100% {
        transform: translate3d(0,0,0) scale(1);
      }
      50% {
        transform: translate3d(-12px,16px,0) scale(1.08);
      }
    }

    @media (max-width: 980px) {
      .hero-grid,
      .about-wrap,
      .process {
        grid-template-columns: 1fr;
      }

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

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

      .nav-menu {
        position: absolute;
        left: 20px;
        right: 20px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        border-radius: 18px;
        background: rgba(255,255,255,0.96);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

      .nav-menu a {
        padding: 12px 14px;
      }

      .nav-action {
        display: none;
      }

      .menu-toggle {
        display: block;
      }
    }

    @media (max-width: 680px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .hero {
        padding: 38px 0 32px;
      }

      .section {
        padding: 34px 0;
      }

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

      .mini-panel {
        margin: 12px 0 0;
      }

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

      .footer-inner {
        grid-template-columns: 1fr;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }