:root {
      --bg: #f4f8f7;
      --bg-soft: #eef5f3;
      --card: #ffffff;
      --card-tint: #f8fbfa;
      --text: #263332;
      --muted: #60706e;
      --light: #7f908d;
      --line: #dce8e5;
      --brand: #4e7772;
      --brand-dark: #2f5652;
      --brand-soft: #dfecea;
      --accent: #b58a5a;
      --shadow: 0 18px 48px rgba(48, 85, 80, 0.12);
      --radius-xl: 28px;
      --radius-lg: 20px;
      --radius-md: 14px;
      --container: 1120px;
      --pad: 18px;
    }

    * {
      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 10% 5%, rgba(197, 218, 214, 0.78), transparent 30%),
        radial-gradient(circle at 95% 18%, rgba(225, 235, 232, 0.95), transparent 33%),
        linear-gradient(180deg, #f7faf9 0%, var(--bg) 42%, #f8faf8 100%);
      line-height: 1.72;
      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(247, 250, 249, 0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(220, 232, 229, 0.9);
    }

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

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: var(--brand-dark);
      letter-spacing: 0.03em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: linear-gradient(135deg, #315e59, #7da39d);
      box-shadow: 0 10px 26px rgba(49, 94, 89, 0.22);
      font-size: 22px;
      line-height: 1;
    }

    .brand-name {
      font-size: 17px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: auto;
    }

    .nav-links a {
      padding: 9px 12px;
      border-radius: 999px;
      color: #41504e;
      font-size: 14px;
      transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .nav-links a:hover {
      background: var(--brand-soft);
      color: var(--brand-dark);
      transform: translateY(-1px);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 40px;
      padding: 0 16px;
      border-radius: 999px;
      background: var(--brand-dark);
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
      box-shadow: 0 10px 24px rgba(47, 86, 82, 0.22);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      white-space: nowrap;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 32px rgba(47, 86, 82, 0.27);
    }

    .menu-toggle {
      display: none;
      border: 1px solid var(--line);
      background: #ffffff;
      color: var(--brand-dark);
      width: 42px;
      height: 42px;
      border-radius: 14px;
      font-size: 20px;
      cursor: pointer;
    }

    main {
      position: relative;
    }

    .hero {
      padding: 48px 0 34px;
    }

    .hero-panel {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
      gap: 28px;
      align-items: stretch;
      padding: 32px;
      border: 1px solid rgba(220, 232, 229, 0.95);
      border-radius: 34px;
      background:
        linear-gradient(135deg, rgba(255,255,255,0.9), rgba(238,245,243,0.86)),
        radial-gradient(circle at top right, rgba(181, 138, 90, 0.14), transparent 42%);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-panel::before {
      content: "";
      position: absolute;
      inset: auto -80px -120px auto;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: rgba(78, 119, 114, 0.12);
      filter: blur(8px);
      pointer-events: none;
      animation: drift 8s ease-in-out infinite alternate;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      border-radius: 999px;
      background: rgba(223, 236, 234, 0.88);
      color: var(--brand-dark);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    h1 {
      margin: 0;
      color: #1f302e;
      font-size: clamp(30px, 5.4vw, 54px);
      line-height: 1.12;
      letter-spacing: -0.04em;
    }

    .hero-text {
      margin: 18px 0 0;
      max-width: 680px;
      color: var(--muted);
      font-size: 16px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      margin-top: 24px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 999px;
      font-weight: 750;
      border: 1px solid transparent;
      cursor: pointer;
      transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #315e59, #5f8a84);
      box-shadow: 0 14px 28px rgba(49, 94, 89, 0.22);
    }

    .btn-secondary {
      color: var(--brand-dark);
      background: rgba(255, 255, 255, 0.7);
      border-color: var(--line);
    }

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

    .hero-notes {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 24px;
    }

    .note {
      padding: 12px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(220, 232, 229, 0.9);
    }

    .note strong {
      display: block;
      color: var(--brand-dark);
      font-size: 15px;
      line-height: 1.35;
    }

    .note span {
      display: block;
      color: var(--light);
      font-size: 12px;
      margin-top: 3px;
    }

    .visual-card {
      position: relative;
      align-self: stretch;
      border-radius: 28px;
      padding: 20px;
      background:
        linear-gradient(180deg, rgba(255,255,255,0.86), rgba(246,250,249,0.92));
      border: 1px solid rgba(220, 232, 229, 0.96);
      box-shadow: inset 0 1px 0 rgba(255,255,255,0.86);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .device-frame {
      border-radius: 22px;
      overflow: hidden;
      border: 1px solid var(--line);
      background: #eaf1ef;
      aspect-ratio: 4 / 3;
    }

    .device-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .diagnosis-strip {
      display: grid;
      gap: 10px;
    }

    .strip-row {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      align-items: center;
      padding: 11px 12px;
      border-radius: 15px;
      background: #ffffff;
      border: 1px solid rgba(220, 232, 229, 0.85);
      color: var(--muted);
      font-size: 13px;
    }

    .strip-row b {
      color: var(--brand-dark);
      font-size: 14px;
    }

    section {
      padding: 32px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 18px;
    }

    .section-kicker {
      margin: 0 0 6px;
      color: var(--accent);
      font-weight: 800;
      font-size: 13px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    h2 {
      margin: 0;
      color: #243634;
      font-size: clamp(24px, 3.5vw, 36px);
      line-height: 1.22;
      letter-spacing: -0.03em;
    }

    .section-desc {
      margin: 0;
      color: var(--muted);
      max-width: 460px;
      font-size: 15px;
    }

    .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, 0.78);
      border: 1px solid rgba(220, 232, 229, 0.95);
      box-shadow: 0 12px 30px rgba(48, 85, 80, 0.07);
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: rgba(126, 163, 157, 0.75);
      box-shadow: 0 18px 42px rgba(48, 85, 80, 0.12);
    }

    .service-icon {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--brand-soft);
      color: var(--brand-dark);
      font-weight: 900;
      margin-bottom: 12px;
    }

    h3 {
      margin: 0 0 8px;
      color: #263332;
      font-size: 18px;
      line-height: 1.35;
    }

    .service-card p,
    .solution-text p,
    .warranty-card p,
    .contact-card p,
    .faq-answer p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .solution-wrap {
      display: grid;
      grid-template-columns: 0.88fr 1.12fr;
      gap: 16px;
      align-items: start;
    }

    .solution-text,
    .contact-card,
    .links-box {
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(220, 232, 229, 0.95);
      box-shadow: 0 12px 30px rgba(48, 85, 80, 0.07);
      padding: 24px;
    }

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

    .process-item {
      display: grid;
      grid-template-columns: 44px 1fr;
      gap: 14px;
      align-items: start;
      padding: 18px;
      border-radius: 22px;
      background: linear-gradient(135deg, #ffffff, #f5faf8);
      border: 1px solid rgba(220, 232, 229, 0.95);
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: #f0e7dc;
      color: #815c32;
      font-weight: 900;
    }

    .process-item p {
      margin: 4px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

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

    .warranty-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(220, 232, 229, 0.95);
    }

    .warranty-card strong {
      display: inline-flex;
      margin-bottom: 8px;
      color: var(--brand-dark);
      font-size: 16px;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      align-items: stretch;
    }

    .contact-list {
      display: grid;
      gap: 12px;
      margin-top: 16px;
    }

    .contact-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 14px;
      border-radius: 18px;
      background: var(--card-tint);
      border: 1px solid rgba(220, 232, 229, 0.9);
    }

    .contact-item span {
      flex: 0 0 auto;
      width: 30px;
      height: 30px;
      border-radius: 11px;
      display: grid;
      place-items: center;
      background: var(--brand-soft);
      color: var(--brand-dark);
      font-weight: 900;
    }

    .contact-item b {
      display: block;
      color: var(--text);
      margin-bottom: 2px;
    }

    .contact-item em {
      display: block;
      color: var(--muted);
      font-style: normal;
      font-size: 14px;
    }

    .map-link {
      color: #1f5f8a;
      font-weight: 800;
    }

    .gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-top: 16px;
    }

    .gallery figure {
      margin: 0;
      border-radius: 18px;
      overflow: hidden;
      background: #eaf1ef;
      border: 1px solid var(--line);
      aspect-ratio: 1 / 0.78;
    }

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

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

    .faq-item {
      border: 1px solid rgba(220, 232, 229, 0.95);
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.78);
      overflow: hidden;
      box-shadow: 0 10px 24px rgba(48, 85, 80, 0.05);
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 800;
      text-align: left;
      cursor: pointer;
    }

    .faq-question span {
      color: var(--brand-dark);
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
    }

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

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

    .links-box {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 18px;
      align-items: start;
    }

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

    .link-cloud a {
      display: inline-flex;
      padding: 8px 12px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid var(--line);
      color: #3d5552;
      font-size: 13px;
      transition: background 0.18s ease, transform 0.18s ease;
    }

    .link-cloud a:hover {
      background: var(--brand-soft);
      transform: translateY(-2px);
    }

    .summary {
      padding: 28px 0 36px;
    }

    .summary-card {
      border-radius: 30px;
      padding: 26px;
      background: linear-gradient(135deg, #315e59, #6f9690);
      color: #ffffff;
      box-shadow: 0 20px 48px rgba(49, 94, 89, 0.2);
    }

    .summary-card h2 {
      color: #ffffff;
    }

    .summary-card p {
      margin: 12px 0 0;
      color: rgba(255, 255, 255, 0.9);
      max-width: 780px;
    }

    .site-footer {
      background: #eef5f3;
      border-top: 1px solid #d9e7e4;
      color: #2f4340;
      padding: 24px 0;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 14px;
    }

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

    .footer-links a {
      color: #345f5a;
      font-weight: 700;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

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

    @keyframes drift {
      from {
        transform: translate3d(0, 0, 0) scale(1);
      }
      to {
        transform: translate3d(-18px, -16px, 0) scale(1.06);
      }
    }

    @media (max-width: 920px) {
      .menu-toggle {
        display: grid;
        place-items: center;
      }

      .nav-links,
      .nav-cta {
        display: none;
      }

      .mobile-panel {
        display: none;
        padding: 0 0 14px;
      }

      .mobile-panel.open {
        display: grid;
        gap: 8px;
      }

      .mobile-panel a {
        padding: 12px 14px;
        border-radius: 14px;
        background: #ffffff;
        border: 1px solid var(--line);
        color: var(--brand-dark);
        font-weight: 700;
      }

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

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

      .section-head {
        display: block;
      }

      .section-desc {
        margin-top: 8px;
      }
    }

    @media (min-width: 921px) {
      .mobile-panel {
        display: none;
      }
    }

    @media (max-width: 620px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .hero {
        padding-top: 28px;
      }

      .hero-panel {
        padding: 20px;
        border-radius: 26px;
      }

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

      .hero-actions {
        align-items: stretch;
      }

      .btn {
        width: 100%;
      }

      section {
        padding: 26px 0;
      }

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