:root {
      --bg: #f7fbf8;
      --bg-soft: #eef8f3;
      --paper: #ffffff;
      --paper-warm: #fffaf2;
      --ink: #21302f;
      --muted: #667776;
      --sea: #2f8f9d;
      --sea-dark: #1d6878;
      --sand: #e7c986;
      --coral: #d9785f;
      --line: rgba(33, 48, 47, 0.12);
      --shadow: 0 18px 45px rgba(29, 104, 120, 0.12);
      --radius: 22px;
      --container: 1160px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 8% 4%, rgba(47, 143, 157, 0.14), transparent 34%),
        radial-gradient(circle at 88% 18%, rgba(231, 201, 134, 0.22), transparent 30%),
        linear-gradient(180deg, #f7fbf8 0%, #fffaf2 48%, #f4fbf9 100%);
      line-height: 1.7;
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(247, 251, 248, 0.86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(33, 48, 47, 0.08);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #ffffff;
      background: linear-gradient(135deg, var(--sea), var(--sea-dark));
      box-shadow: 0 10px 24px rgba(47, 143, 157, 0.25);
      font-size: 22px;
    }

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

    .brand-text span:first-child {
      font-size: 17px;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      font-size: 14px;
      color: #385250;
    }

    .nav-links a {
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--sea-dark);
      border-color: var(--sand);
    }

    .nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 18px;
      border-radius: 999px;
      background: var(--ink);
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
      box-shadow: 0 12px 24px rgba(33, 48, 47, 0.15);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      white-space: nowrap;
    }

    .nav-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 28px rgba(33, 48, 47, 0.2);
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 50%;
      background: #ffffff;
      color: var(--ink);
      cursor: pointer;
      font-size: 20px;
    }

    main {
      overflow: hidden;
    }

    section {
      padding: 58px 0;
    }

    .hero {
      padding: 54px 0 52px;
    }

    .hero-shell {
      display: grid;
      grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.88fr);
      gap: 42px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      width: fit-content;
      padding: 7px 12px;
      border: 1px solid rgba(47, 143, 157, 0.2);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--sea-dark);
      font-size: 13px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--coral);
      box-shadow: 0 0 0 5px rgba(217, 120, 95, 0.12);
    }

    h1 {
      margin: 22px 0 16px;
      max-width: 680px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: 0;
      color: #172625;
    }

    .hero-lead {
      max-width: 640px;
      margin: 0;
      color: #4e625f;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 20px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 800;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--sea), var(--sea-dark));
      color: #ffffff;
      box-shadow: 0 16px 32px rgba(47, 143, 157, 0.22);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.76);
      color: var(--ink);
      border-color: rgba(33, 48, 47, 0.12);
    }

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

    .hero-note {
      margin-top: 22px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      color: #536965;
      font-size: 14px;
    }

    .hero-note span {
      padding: 6px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.64);
      border: 1px solid rgba(47, 143, 157, 0.12);
    }

    .hero-visual {
      position: relative;
      padding: 14px;
      border-radius: 34px;
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(238, 248, 243, 0.74));
      border: 1px solid rgba(255, 255, 255, 0.85);
      box-shadow: var(--shadow);
      animation: floatIn 0.8s ease both;
    }

    .image-frame {
      overflow: hidden;
      border-radius: 26px;
      background: #e9f3ef;
      aspect-ratio: 4 / 3;
    }

    .image-frame img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 10px;
    }

    .status-strip {
      position: absolute;
      left: 28px;
      right: 28px;
      bottom: 28px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
      padding: 10px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.86);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(33, 48, 47, 0.1);
    }

    .status-strip span {
      display: block;
      font-size: 12px;
      color: var(--muted);
    }

    .status-strip strong {
      display: block;
      margin-top: 2px;
      font-size: 14px;
      color: var(--ink);
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-head h2 {
      margin: 0;
      max-width: 620px;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: 0;
      color: #172625;
    }

    .section-head p {
      margin: 0;
      max-width: 420px;
      color: var(--muted);
      font-size: 15px;
    }

    .about-band {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 30px;
      align-items: start;
      padding: 30px;
      border-radius: 30px;
      background: rgba(255, 255, 255, 0.74);
      border: 1px solid rgba(33, 48, 47, 0.08);
      box-shadow: 0 18px 38px rgba(47, 143, 157, 0.08);
    }

    .about-image {
      border-radius: 24px;
      overflow: hidden;
      background: var(--bg-soft);
      aspect-ratio: 5 / 4;
    }

    .about-image img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 8px;
    }

    .about-copy h2 {
      margin: 0 0 14px;
      font-size: 30px;
      line-height: 1.25;
    }

    .about-copy p {
      margin: 0 0 16px;
      color: #536965;
    }

    .service-list {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin-top: 18px;
    }

    .service-list div {
      padding: 12px 14px;
      border-radius: 16px;
      background: var(--paper-warm);
      border: 1px solid rgba(231, 201, 134, 0.28);
      font-weight: 700;
      color: #334743;
    }

    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .solution-card {
      position: relative;
      padding: 24px;
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(33, 48, 47, 0.1);
      box-shadow: 0 14px 34px rgba(47, 143, 157, 0.08);
      transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    }

    .solution-card::before {
      content: "";
      display: block;
      width: 42px;
      height: 5px;
      margin-bottom: 18px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--sea), var(--sand));
    }

    .solution-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 42px rgba(47, 143, 157, 0.14);
      border-color: rgba(47, 143, 157, 0.24);
    }

    .solution-card h3 {
      margin: 0 0 10px;
      font-size: 20px;
      line-height: 1.35;
    }

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

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

    .steps-panel {
      padding: 26px;
      border-radius: 26px;
      background: linear-gradient(155deg, rgba(47, 143, 157, 0.11), rgba(255, 250, 242, 0.88));
      border: 1px solid rgba(47, 143, 157, 0.14);
    }

    .steps-panel h2 {
      margin: 0 0 12px;
      font-size: 28px;
    }

    .steps-panel p {
      margin: 0;
      color: #536965;
    }

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

    .step-list li {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      padding: 18px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(33, 48, 47, 0.09);
    }

    .step-list strong {
      display: grid;
      place-items: center;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--paper-warm);
      color: var(--sea-dark);
    }

    .step-list h3 {
      margin: 0 0 4px;
      font-size: 18px;
    }

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

    .guarantee-wrap {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .guarantee-item {
      padding: 20px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(33, 48, 47, 0.09);
    }

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

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

    .store-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 22px;
      align-items: start;
      padding: 28px;
      border-radius: 28px;
      background: #ffffff;
      border: 1px solid rgba(33, 48, 47, 0.08);
      box-shadow: 0 18px 40px rgba(33, 48, 47, 0.08);
    }

    .store-info h2 {
      margin: 0 0 12px;
      font-size: 28px;
    }

    .info-list {
      display: grid;
      gap: 10px;
      margin-top: 18px;
    }

    .info-line {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 12px 0;
      border-bottom: 1px solid rgba(33, 48, 47, 0.08);
      color: #4c625e;
    }

    .info-line strong {
      min-width: 72px;
      color: var(--ink);
    }

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

    .link-cloud a {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 0 12px;
      border-radius: 999px;
      background: var(--bg-soft);
      border: 1px solid rgba(47, 143, 157, 0.12);
      color: #2f5558;
      font-size: 13px;
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .link-cloud a:hover {
      background: #ffffff;
      transform: translateY(-2px);
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(33, 48, 47, 0.1);
      overflow: hidden;
    }

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

    .faq-question span {
      width: 26px;
      height: 26px;
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      border-radius: 50%;
      background: var(--paper-warm);
      color: var(--sea-dark);
      transition: transform 0.2s ease;
    }

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

    .faq-item.is-open .faq-answer {
      display: block;
    }

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

    .summary {
      padding-top: 34px;
    }

    .summary-box {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
      padding: 28px;
      border-radius: 30px;
      background: linear-gradient(135deg, rgba(47, 143, 157, 0.14), rgba(231, 201, 134, 0.26));
      border: 1px solid rgba(47, 143, 157, 0.14);
    }

    .summary-box h2 {
      margin: 0 0 8px;
      font-size: 28px;
    }

    .summary-box p {
      margin: 0;
      max-width: 760px;
      color: #526864;
    }

    .site-footer {
      margin-top: 20px;
      padding: 28px 0;
      background: #17302f;
      color: #eaf5f1;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
    }

    .footer-brand span:first-child {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #ffffff;
      color: #17302f;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 13px;
    }

    .footer-links a {
      color: #d9ebe6;
    }

    .copyright {
      margin: 6px 0 0;
      color: #b8d0ca;
      font-size: 13px;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.55s ease, transform 0.55s ease;
    }

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

    @keyframes floatIn {
      from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (max-width: 920px) {
      .nav-links,
      .nav-action {
        display: none;
      }

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

      .nav.is-open {
        flex-wrap: wrap;
        padding-bottom: 14px;
      }

      .nav.is-open .nav-links {
        order: 3;
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
      }

      .nav.is-open .nav-action {
        order: 4;
        display: inline-flex;
      }

      .hero-shell,
      .about-band,
      .steps,
      .store-panel,
      .summary-box {
        grid-template-columns: 1fr;
      }

      .solution-grid,
      .guarantee-wrap {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

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

      section {
        padding: 42px 0;
      }

      .hero {
        padding-top: 36px;
      }

      .hero-shell {
        gap: 28px;
      }

      .status-strip {
        position: static;
        margin-top: 12px;
        grid-template-columns: 1fr;
      }

      .service-list,
      .solution-grid,
      .guarantee-wrap {
        grid-template-columns: 1fr;
      }

      .about-band,
      .store-panel {
        padding: 20px;
      }

      .summary-box {
        padding: 22px;
      }

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