:root {
      --bg: #f5fbff;
      --bg-soft: #eaf8fb;
      --card: #ffffff;
      --card-blue: #f0fbff;
      --text: #16313d;
      --muted: #55717b;
      --primary: #0c8fb3;
      --primary-dark: #076c8f;
      --mint: #6ed6c5;
      --ice: #dff8ff;
      --line: rgba(12, 143, 179, 0.18);
      --shadow: 0 18px 45px rgba(9, 92, 120, 0.12);
      --radius: 24px;
      --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(--text);
      line-height: 1.65;
      background:
        radial-gradient(circle at 12% 6%, rgba(110, 214, 197, 0.28), transparent 28%),
        radial-gradient(circle at 88% 14%, rgba(122, 211, 255, 0.32), transparent 30%),
        linear-gradient(180deg, #f6fcff 0%, #f2fbfc 45%, #fffaf1 100%);
      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(246, 252, 255, 0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(12, 143, 179, 0.14);
    }

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

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

    .logo-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), var(--mint));
      box-shadow: 0 10px 26px rgba(12, 143, 179, 0.22);
      font-size: 22px;
      letter-spacing: 1px;
    }

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

    .brand-text small {
      color: var(--muted);
      font-weight: 600;
      font-size: 12px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-links a {
      padding: 10px 12px;
      border-radius: 999px;
      color: #254653;
      font-size: 15px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-links a:hover {
      background: rgba(12, 143, 179, 0.1);
      color: var(--primary-dark);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 18px;
      border-radius: 999px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), #41b9c7);
      box-shadow: 0 12px 28px rgba(12, 143, 179, 0.2);
      font-weight: 700;
      white-space: nowrap;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 34px rgba(12, 143, 179, 0.26);
    }

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

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 5px auto;
      background: var(--primary-dark);
      border-radius: 2px;
    }

    main {
      position: relative;
    }

    section {
      padding: 58px 0;
    }

    .hero {
      padding: 66px 0 42px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.78fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 13px;
      border: 1px solid rgba(12, 143, 179, 0.16);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--primary-dark);
      font-size: 14px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--mint);
      box-shadow: 0 0 0 6px rgba(110, 214, 197, 0.18);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -1.4px;
      color: #12313e;
    }

    .lead {
      max-width: 680px;
      margin: 0;
      color: #405f69;
      font-size: 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: 46px;
      padding: 0 20px;
      border-radius: 15px;
      font-weight: 800;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), #63cfc8);
      box-shadow: 0 14px 30px rgba(12, 143, 179, 0.22);
    }

    .btn-secondary {
      color: var(--primary-dark);
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid var(--line);
    }

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

    .hero-note {
      margin-top: 18px;
      color: var(--muted);
      font-size: 14px;
    }

    .cool-panel {
      position: relative;
      overflow: hidden;
      border-radius: 32px;
      background: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(222, 249, 255, 0.88));
      border: 1px solid rgba(12, 143, 179, 0.16);
      box-shadow: var(--shadow);
      padding: 18px;
      animation: floatPanel 5.5s ease-in-out infinite;
    }

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

    .image-wrap {
      aspect-ratio: 4 / 3;
      border-radius: 24px;
      overflow: hidden;
      background: var(--ice);
      border: 1px solid rgba(12, 143, 179, 0.12);
    }

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

    .temperature-card {
      margin-top: 16px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .mini-stat {
      padding: 16px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(12, 143, 179, 0.13);
    }

    .mini-stat strong {
      display: block;
      color: var(--primary-dark);
      font-size: 18px;
      margin-bottom: 4px;
    }

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

    .section-title {
      max-width: 760px;
      margin-bottom: 24px;
    }

    .section-title h2 {
      margin: 0 0 10px;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.18;
      color: #173340;
    }

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

    .pain-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 22px;
      align-items: stretch;
    }

    .text-card,
    .service-card,
    .solution-card,
    .faq-item,
    .link-card {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: 0 12px 32px rgba(9, 92, 120, 0.08);
    }

    .text-card {
      padding: 26px;
    }

    .text-card h3,
    .service-card h3,
    .solution-card h3 {
      margin: 0 0 10px;
      color: #173340;
      font-size: 21px;
    }

    .text-card p,
    .service-card p,
    .solution-card p {
      margin: 0;
      color: #4d6973;
    }

    .check-list {
      display: grid;
      gap: 12px;
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
    }

    .check-list li {
      position: relative;
      padding-left: 28px;
      color: #395a65;
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--primary-dark);
      font-weight: 900;
    }

    .symptom-strip {
      display: grid;
      gap: 12px;
    }

    .symptom {
      padding: 18px;
      border-radius: 22px;
      background: linear-gradient(135deg, rgba(225, 249, 255, 0.92), rgba(255, 255, 255, 0.86));
      border: 1px solid rgba(12, 143, 179, 0.14);
    }

    .symptom strong {
      display: block;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .symptom span {
      color: var(--muted);
      font-size: 14px;
    }

    .solutions {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }

    .solution-card {
      padding: 24px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 18px 38px rgba(9, 92, 120, 0.13);
    }

    .icon-bubble {
      width: 48px;
      height: 48px;
      margin-bottom: 16px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      background: linear-gradient(135deg, #e2fbff, #fff3d9);
      color: var(--primary-dark);
      font-size: 24px;
      font-weight: 900;
    }

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

    .step {
      position: relative;
      padding: 22px 18px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--line);
      counter-increment: step;
    }

    .step::before {
      content: counter(step);
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      margin-bottom: 14px;
      border-radius: 12px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
    }

    .step h3 {
      margin: 0 0 8px;
      font-size: 18px;
    }

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

    .about-grid {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 24px;
      align-items: center;
    }

    .about-photo {
      border-radius: 30px;
      overflow: hidden;
      border: 1px solid rgba(12, 143, 179, 0.14);
      box-shadow: var(--shadow);
      background: #ffffff;
    }

    .about-photo .image-wrap {
      border: 0;
      border-radius: 0;
      aspect-ratio: 5 / 4;
    }

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

    .service-card {
      padding: 22px;
    }

    .service-card small {
      display: inline-block;
      margin-bottom: 8px;
      padding: 4px 10px;
      border-radius: 999px;
      background: #e7faff;
      color: var(--primary-dark);
      font-weight: 800;
    }

    .guarantee {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .guarantee-box {
      padding: 24px;
      border-radius: 28px;
      border: 1px solid rgba(12, 143, 179, 0.16);
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(230, 250, 255, 0.74));
      box-shadow: 0 12px 32px rgba(9, 92, 120, 0.08);
    }

    .guarantee-box h3 {
      margin: 0 0 12px;
      font-size: 21px;
    }

    .guarantee-box ul {
      margin: 0;
      padding-left: 20px;
      color: #496671;
    }

    .guarantee-box li + li {
      margin-top: 8px;
    }

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

    .faq-item {
      overflow: hidden;
    }

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

    .faq-question span:last-child {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      border-radius: 50%;
      background: var(--card-blue);
      color: var(--primary-dark);
      transition: transform 0.2s 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 span:last-child {
      transform: rotate(45deg);
    }

    .visit-card {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 18px;
      align-items: stretch;
      padding: 26px;
      border-radius: 32px;
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(218, 248, 255, 0.82)),
        radial-gradient(circle at top right, rgba(255, 220, 141, 0.24), transparent 28%);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .visit-card h2 {
      margin: 0 0 10px;
      font-size: clamp(25px, 4vw, 36px);
    }

    .visit-card p {
      margin: 0 0 16px;
      color: var(--muted);
    }

    .store-info {
      display: grid;
      gap: 10px;
      padding: 18px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(12, 143, 179, 0.14);
    }

    .store-info div {
      color: #395a65;
    }

    .store-info strong {
      color: #173340;
    }

    .related-links {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .link-card {
      display: flex;
      align-items: center;
      min-height: 70px;
      padding: 16px;
      color: #214752;
      font-weight: 700;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .link-card:hover {
      transform: translateY(-3px);
      border-color: rgba(12, 143, 179, 0.35);
    }

    .site-footer {
      margin-top: 12px;
      padding: 30px 0;
      background: #eaf8fb;
      border-top: 1px solid rgba(12, 143, 179, 0.16);
      color: #24444f;
    }

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

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

    .footer-links a {
      color: #235966;
      font-weight: 700;
    }

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

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

    @media (max-width: 900px) {
      .menu-toggle {
        display: block;
      }

      .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 14px;
        border-radius: 20px;
        background: rgba(255, 255, 255, 0.96);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

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

      .nav-cta {
        display: none;
      }

      .hero-grid,
      .pain-grid,
      .about-grid,
      .visit-card,
      .guarantee {
        grid-template-columns: 1fr;
      }

      .solutions,
      .steps,
      .related-links {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 620px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      section {
        padding: 42px 0;
      }

      .hero {
        padding-top: 42px;
      }

      .brand-text span {
        font-size: 14px;
      }

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

      .btn {
        width: 100%;
      }

      .temperature-card,
      .solutions,
      .steps,
      .service-grid,
      .related-links {
        grid-template-columns: 1fr;
      }

      .text-card,
      .service-card,
      .solution-card,
      .visit-card {
        padding: 20px;
      }

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