:root {
      --bg: #f6f1e8;
      --paper: #fffdf8;
      --ink: #172033;
      --muted: #5d6678;
      --line: #ddd2c2;
      --brand: #0d3b66;
      --brand-2: #b7791f;
      --accent: #ffbf47;
      --soft: #eaf1f8;
      --white: #ffffff;
      --shadow: 0 18px 45px rgba(23, 32, 51, .12);
      --radius-xl: 28px;
      --radius-lg: 20px;
      --radius-md: 14px;
      --container: 1120px;
    }

    * {
      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% 8%, rgba(255, 191, 71, .2), transparent 28%),
        radial-gradient(circle at 92% 18%, rgba(13, 59, 102, .12), transparent 30%),
        linear-gradient(180deg, #fff8ec 0%, var(--bg) 42%, #f8f4ec 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% - 36px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 253, 248, .92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(221, 210, 194, .85);
    }

    .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;
      background: linear-gradient(135deg, var(--brand), #1b5b8f);
      font-weight: 900;
      font-size: 22px;
      box-shadow: 0 12px 24px rgba(13, 59, 102, .2);
    }

    .brand-name {
      font-weight: 800;
      letter-spacing: .02em;
      color: var(--ink);
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 4px;
    }

    .nav-links a {
      padding: 10px 12px;
      color: #2f3a50;
      font-size: 15px;
      border-radius: 999px;
      transition: background .2s ease, color .2s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: var(--soft);
      color: var(--brand);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 16px;
      border-radius: 999px;
      background: var(--brand);
      color: #fff;
      font-weight: 700;
      font-size: 14px;
      box-shadow: 0 10px 22px rgba(13, 59, 102, .2);
      transition: transform .2s ease, box-shadow .2s ease;
      white-space: nowrap;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 26px rgba(13, 59, 102, .28);
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: #fff;
      color: var(--ink);
      font-size: 22px;
      cursor: pointer;
    }

    main {
      position: relative;
    }

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

    .hero-panel {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(280px, .72fr);
      gap: 28px;
      align-items: stretch;
    }

    .hero-copy {
      padding: clamp(28px, 5vw, 52px);
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 253, 248, .96), rgba(255, 247, 231, .92)),
        linear-gradient(135deg, rgba(13, 59, 102, .1), transparent);
      border: 1px solid rgba(221, 210, 194, .9);
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
      animation: riseIn .7s ease both;
    }

    .hero-copy::after {
      content: "";
      position: absolute;
      right: -70px;
      top: -70px;
      width: 210px;
      height: 210px;
      border-radius: 50%;
      background: rgba(255, 191, 71, .24);
      pointer-events: none;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--brand);
      background: #edf4fb;
      border: 1px solid #d8e5f0;
      padding: 7px 12px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--brand-2);
      box-shadow: 0 0 0 5px rgba(183, 121, 31, .14);
    }

    h1 {
      margin: 0;
      font-size: clamp(32px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -.04em;
      color: #111827;
      max-width: 780px;
    }

    .lead {
      margin: 20px 0 0;
      max-width: 710px;
      color: #394256;
      font-size: clamp(16px, 2.2vw, 19px);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      margin-top: 30px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 14px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--brand), #16568a);
      box-shadow: 0 14px 26px rgba(13, 59, 102, .22);
    }

    .btn-secondary {
      color: var(--brand);
      background: #fff;
      border-color: #c9d7e4;
    }

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

    .quick-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 20px;
      padding: 28px;
      border-radius: var(--radius-xl);
      background: #0d3b66;
      color: #fff;
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
      animation: riseIn .8s ease .08s both;
    }

    .quick-card::before {
      content: "";
      position: absolute;
      inset: auto -50px -80px auto;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: rgba(255, 191, 71, .22);
    }

    .quick-card h2 {
      margin: 0 0 10px;
      color: #fff;
      font-size: 24px;
      line-height: 1.25;
    }

    .quick-card p {
      margin: 0;
      color: #dce9f5;
    }

    .check-list {
      list-style: none;
      padding: 0;
      margin: 18px 0 0;
      display: grid;
      gap: 10px;
      position: relative;
    }

    .check-list li {
      display: flex;
      gap: 10px;
      color: #fff7e7;
      font-size: 15px;
    }

    .check-list li::before {
      content: "✓";
      color: var(--accent);
      font-weight: 900;
    }

    .status-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 24px;
    }

    .status-item {
      padding: 14px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .12);
      border: 1px solid rgba(255, 255, 255, .18);
    }

    .status-item strong {
      display: block;
      color: #fff;
      font-size: 16px;
      line-height: 1.2;
    }

    .status-item span {
      display: block;
      color: #dce9f5;
      font-size: 13px;
      margin-top: 4px;
    }

    .section {
      padding: 34px 0;
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, .8fr) minmax(280px, .55fr);
      gap: 22px;
      align-items: end;
      margin-bottom: 22px;
    }

    .section-kicker {
      margin: 0 0 8px;
      color: var(--brand-2);
      font-size: 14px;
      font-weight: 900;
      letter-spacing: .08em;
      text-transform: uppercase;
    }

    h2 {
      margin: 0;
      font-size: clamp(25px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -.03em;
      color: #121a2b;
    }

    .section-desc {
      margin: 0;
      color: var(--muted);
      font-size: 16px;
    }

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

    .service-card {
      padding: 22px;
      border-radius: var(--radius-lg);
      background: rgba(255, 253, 248, .9);
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(23, 32, 51, .07);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: #b7cbe0;
      box-shadow: 0 18px 34px rgba(23, 32, 51, .12);
    }

    .icon-box {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      margin-bottom: 16px;
      color: #fff;
      background: linear-gradient(135deg, var(--brand), #2a6d9f);
      font-weight: 900;
    }

    .service-card h3 {
      margin: 0 0 8px;
      font-size: 19px;
      color: #152036;
    }

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

    .solution-wrap {
      display: grid;
      grid-template-columns: minmax(0, .72fr) minmax(0, 1fr);
      gap: 20px;
      align-items: stretch;
    }

    .visual-card {
      border-radius: var(--radius-xl);
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .visual-card .image-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
    }

    .image-tile {
      aspect-ratio: 1 / .86;
      overflow: hidden;
      background: #e9eef3;
    }

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

    .visual-caption {
      padding: 20px;
      color: #344057;
      background: #fffdf8;
      font-size: 15px;
    }

    .steps {
      display: grid;
      gap: 14px;
    }

    .step {
      display: grid;
      grid-template-columns: 44px minmax(0, 1fr);
      gap: 14px;
      padding: 18px;
      border-radius: var(--radius-lg);
      background: #fffdf8;
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(23, 32, 51, .06);
    }

    .step-number {
      width: 44px;
      height: 44px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: #f1dfbd;
      color: #70440d;
      font-weight: 900;
    }

    .step h3 {
      margin: 0 0 6px;
      font-size: 18px;
      color: #142033;
    }

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

    .proof-band {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      padding: 24px;
      border-radius: var(--radius-xl);
      background: linear-gradient(135deg, #112b49, #0d3b66);
      color: #fff;
      box-shadow: var(--shadow);
    }

    .proof-band h2 {
      color: #fff;
    }

    .proof-band p {
      color: #dbe8f3;
      margin: 12px 0 0;
    }

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

    .proof-list li {
      padding: 12px 14px;
      border-radius: 14px;
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .16);
      color: #fff7e7;
      font-size: 15px;
    }

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

    .policy-card {
      padding: 22px;
      border-radius: var(--radius-lg);
      background: #fffdf8;
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(23, 32, 51, .06);
    }

    .policy-card h3 {
      margin: 0 0 10px;
      font-size: 19px;
      color: #172033;
    }

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

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255, 253, 248, .95);
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(23, 32, 51, .05);
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: #172033;
      padding: 18px 20px;
      text-align: left;
      font-size: 17px;
      font-weight: 800;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 18px;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: var(--soft);
      color: var(--brand);
      flex: 0 0 auto;
    }

    .faq-item.active .faq-question::after {
      content: "−";
      background: var(--brand);
      color: #fff;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      display: block;
      animation: fadeIn .22s ease both;
    }

    .link-panel {
      padding: 24px;
      border-radius: var(--radius-xl);
      background: #fffdf8;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .link-panel h2 {
      margin-bottom: 14px;
    }

    .link-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 16px;
    }

    .link-cloud a {
      display: inline-flex;
      padding: 9px 12px;
      border-radius: 999px;
      background: #edf4fb;
      color: #19496f;
      border: 1px solid #d5e4ef;
      font-size: 14px;
      transition: transform .2s ease, background .2s ease;
    }

    .link-cloud a:hover {
      transform: translateY(-2px);
      background: #fff0cd;
      color: #6b420d;
    }

    .contact-card {
      display: grid;
      grid-template-columns: minmax(0, .9fr) minmax(280px, .6fr);
      gap: 20px;
      align-items: stretch;
      padding: 26px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 253, 248, .98), rgba(243, 236, 224, .96));
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

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

    .info-row {
      display: grid;
      grid-template-columns: 92px minmax(0, 1fr);
      gap: 12px;
      padding: 13px 0;
      border-bottom: 1px solid rgba(221, 210, 194, .85);
    }

    .info-row:last-child {
      border-bottom: 0;
    }

    .info-row strong {
      color: #172033;
    }

    .info-row span,
    .info-row a {
      color: #465166;
    }

    .contact-aside {
      padding: 22px;
      border-radius: 20px;
      background: #0d3b66;
      color: #fff;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 18px;
    }

    .contact-aside h3 {
      margin: 0 0 8px;
      color: #fff;
      font-size: 22px;
    }

    .contact-aside p {
      margin: 0;
      color: #dce9f5;
    }

    .site-footer {
      margin-top: 28px;
      background: #0b2339;
      color: #e7eef6;
      border-top: 1px solid rgba(255, 255, 255, .1);
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 22px 0;
    }

    .footer-inner p {
      margin: 0;
      color: #cdd8e4;
      font-size: 14px;
    }

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

    .footer-links a {
      color: #f4f8fc;
      font-size: 14px;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity .55s ease, transform .55s ease;
    }

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

    @keyframes riseIn {
      from {
        opacity: 0;
        transform: translateY(18px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 920px) {
      .nav {
        min-height: 66px;
      }

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

      .nav-links {
        position: absolute;
        left: 18px;
        right: 18px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        border-radius: 18px;
        background: #fffdf8;
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

      .nav-links a,
      .nav-cta {
        width: 100%;
        justify-content: center;
      }

      .hero-panel,
      .section-head,
      .solution-wrap,
      .proof-band,
      .contact-card {
        grid-template-columns: 1fr;
      }

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

    @media (max-width: 640px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .hero {
        padding: 34px 0 24px;
      }

      .section {
        padding: 26px 0;
      }

      .hero-copy,
      .quick-card,
      .proof-band,
      .contact-card,
      .link-panel {
        border-radius: 22px;
      }

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

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

      .info-row {
        grid-template-columns: 1fr;
        gap: 3px;
      }

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