:root {
      --bg: #f7f8f6;
      --surface: #ffffff;
      --surface-soft: #eef3ef;
      --text: #1f2a2a;
      --muted: #657171;
      --line: #dfe6e1;
      --brand: #4c7568;
      --brand-dark: #2f5b50;
      --brand-soft: #e4eee9;
      --warm: #f5efe6;
      --shadow: 0 18px 48px rgba(47, 91, 80, 0.10);
      --radius: 24px;
      --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(--text);
      background:
        radial-gradient(circle at 6% 3%, rgba(220, 235, 228, 0.9), transparent 30%),
        radial-gradient(circle at 96% 18%, rgba(245, 239, 230, 0.95), transparent 28%),
        linear-gradient(180deg, #fbfcfa 0%, var(--bg) 46%, #ffffff 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% - 32px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 255, 255, 0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(223, 230, 225, 0.72);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex: 0 0 auto;
      font-weight: 800;
      letter-spacing: 0.04em;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: linear-gradient(135deg, var(--brand-dark), var(--brand));
      box-shadow: 0 12px 28px rgba(47, 91, 80, 0.18);
      font-size: 22px;
    }

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

    .brand-name strong {
      font-size: 16px;
      color: var(--text);
    }

    .brand-name span {
      font-size: 12px;
      color: var(--muted);
      margin-top: 3px;
      font-weight: 500;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 6px;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 10px 12px;
      border-radius: 999px;
      color: #344141;
      font-size: 14px;
      transition: background 0.2s ease, color 0.2s ease;
    }

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

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 10px 16px;
      border-radius: 999px;
      background: var(--text);
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 0 12px 28px rgba(31, 42, 42, 0.14);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 34px rgba(31, 42, 42, 0.18);
    }

    .menu-btn {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #ffffff;
      color: var(--text);
      font-size: 22px;
      cursor: pointer;
    }

    main {
      position: relative;
    }

    section {
      padding: 54px 0;
    }

    .hero {
      padding: 54px 0 38px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(310px, 0.92fr);
      gap: 34px;
      align-items: center;
    }

    .hero-copy {
      animation: riseIn 0.7s ease both;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--brand-dark);
      font-size: 13px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--brand);
      box-shadow: 0 0 0 5px rgba(76, 117, 104, 0.12);
    }

    h1 {
      margin: 22px 0 16px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.12;
      letter-spacing: -0.05em;
      color: #182222;
    }

    .hero-lead {
      max-width: 720px;
      margin: 0;
      color: #4b5858;
      font-size: clamp(16px, 2.4vw, 19px);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 12px 18px;
      border-radius: 16px;
      font-weight: 800;
      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, var(--brand-dark), var(--brand));
      box-shadow: 0 16px 34px rgba(47, 91, 80, 0.18);
    }

    .btn-secondary {
      color: var(--brand-dark);
      background: #ffffff;
      border-color: var(--line);
    }

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

    .quick-note {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 30px;
      max-width: 760px;
    }

    .note-item {
      padding: 14px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(223, 230, 225, 0.84);
    }

    .note-item strong {
      display: block;
      color: var(--text);
      font-size: 15px;
      margin-bottom: 3px;
    }

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

    .hero-card {
      position: relative;
      padding: 18px;
      border-radius: 32px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(223, 230, 225, 0.88);
      box-shadow: var(--shadow);
      animation: floatCard 5.8s ease-in-out infinite;
    }

    .phone-frame {
      overflow: hidden;
      border-radius: 26px;
      background: linear-gradient(180deg, #f8fbf8, #edf4ef);
      border: 1px solid var(--line);
      aspect-ratio: 4 / 3;
      display: grid;
      place-items: center;
    }

    .phone-frame img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 14px;
    }

    .price-panel {
      margin-top: 16px;
      padding: 18px;
      border-radius: 24px;
      background: var(--surface-soft);
      display: grid;
      gap: 10px;
    }

    .price-panel h2 {
      margin: 0;
      font-size: 20px;
      letter-spacing: -0.02em;
    }

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

    .price-list {
      display: grid;
      gap: 10px;
      margin-top: 6px;
    }

    .price-row {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 14px;
      padding-top: 10px;
      border-top: 1px solid rgba(76, 117, 104, 0.16);
      color: #334040;
      font-size: 14px;
    }

    .price-row span:last-child {
      color: var(--brand-dark);
      font-weight: 800;
      white-space: nowrap;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 26px;
    }

    .section-title {
      margin: 0;
      font-size: clamp(26px, 4vw, 40px);
      line-height: 1.2;
      letter-spacing: -0.04em;
      color: #172121;
    }

    .section-desc {
      margin: 0;
      max-width: 560px;
      color: var(--muted);
      font-size: 15px;
    }

    .service-band {
      background: rgba(255, 255, 255, 0.52);
      border-block: 1px solid rgba(223, 230, 225, 0.72);
    }

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

    .service-card {
      padding: 22px;
      border-radius: 24px;
      background: #ffffff;
      border: 1px solid var(--line);
      box-shadow: 0 12px 32px rgba(47, 91, 80, 0.06);
      transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: rgba(76, 117, 104, 0.38);
      box-shadow: 0 18px 42px rgba(47, 91, 80, 0.10);
    }

    .service-card h3 {
      margin: 0 0 9px;
      font-size: 19px;
      color: var(--text);
    }

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

    .solution-wrap {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 20px;
      align-items: stretch;
    }

    .solution-aside {
      padding: 26px;
      border-radius: 28px;
      background: linear-gradient(145deg, #ffffff, #eef5f1);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .solution-aside h2 {
      margin: 0 0 12px;
      font-size: 28px;
      line-height: 1.25;
      letter-spacing: -0.03em;
    }

    .solution-aside p {
      margin: 0 0 18px;
      color: var(--muted);
    }

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

    .check-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #344141;
      font-size: 14px;
    }

    .check-list li::before {
      content: "✓";
      flex: 0 0 22px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: var(--brand-soft);
      color: var(--brand-dark);
      font-size: 13px;
      font-weight: 900;
      margin-top: 1px;
    }

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

    .process-step {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      padding: 18px;
      border-radius: 22px;
      background: #ffffff;
      border: 1px solid var(--line);
    }

    .step-num {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      background: var(--warm);
      color: #755c36;
      display: grid;
      place-items: center;
      font-weight: 900;
    }

    .process-step h3 {
      margin: 0 0 5px;
      font-size: 17px;
    }

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

    .guarantee-panel {
      padding: 28px;
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(255,255,255,0.95), rgba(242,247,244,0.92)),
        radial-gradient(circle at 95% 0%, rgba(245,239,230,0.9), transparent 40%);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .policy-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 22px;
    }

    .policy-item {
      padding: 18px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(223, 230, 225, 0.86);
    }

    .policy-item h3 {
      margin: 0 0 6px;
      font-size: 17px;
      color: var(--text);
    }

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

    .contact-layout {
      display: grid;
      grid-template-columns: 1.02fr 0.98fr;
      gap: 18px;
      align-items: stretch;
    }

    .contact-card {
      padding: 26px;
      border-radius: 28px;
      background: #ffffff;
      border: 1px solid var(--line);
      box-shadow: 0 14px 38px rgba(47, 91, 80, 0.08);
    }

    .contact-card h2 {
      margin: 0 0 16px;
      font-size: 30px;
      letter-spacing: -0.03em;
    }

    .info-list {
      display: grid;
      gap: 13px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .info-list li {
      display: grid;
      grid-template-columns: 88px 1fr;
      gap: 12px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--line);
      color: #344141;
    }

    .info-list li:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .info-list strong {
      color: var(--text);
    }

    .info-list a {
      color: var(--brand-dark);
      font-weight: 800;
      word-break: break-word;
    }

    .qr-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 20px;
    }

    .qr-box {
      padding: 14px;
      border-radius: 22px;
      background: var(--surface-soft);
      border: 1px solid rgba(76, 117, 104, 0.13);
      text-align: center;
    }

    .qr-img {
      width: 138px;
      height: 138px;
      margin: 0 auto 10px;
      border-radius: 16px;
      background: #ffffff;
      padding: 8px;
      object-fit: contain;
      border: 1px solid var(--line);
    }

    .qr-fallback {
      width: 138px;
      height: 138px;
      margin: 0 auto 10px;
      border-radius: 16px;
      background:
        linear-gradient(90deg, #233 10px, transparent 10px) 0 0 / 28px 28px,
        linear-gradient(#233 10px, transparent 10px) 0 0 / 28px 28px,
        #ffffff;
      border: 8px solid #ffffff;
      box-shadow: inset 0 0 0 1px var(--line);
    }

    .qr-box strong {
      display: block;
      font-size: 15px;
      color: var(--text);
    }

    .qr-box span,
    .qr-box a {
      display: block;
      margin-top: 5px;
      color: var(--muted);
      font-size: 13px;
      word-break: break-word;
    }

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.86);
      overflow: hidden;
      box-shadow: 0 10px 24px rgba(47, 91, 80, 0.05);
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 16px 18px;
      border: 0;
      background: transparent;
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 16px;
      font-weight: 800;
      text-align: left;
      cursor: pointer;
    }

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

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
      font-size: 14px;
    }

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

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

    .links-panel {
      padding: 24px;
      border-radius: 28px;
      background: #ffffff;
      border: 1px solid var(--line);
    }

    .links-panel h2 {
      margin: 0 0 16px;
      font-size: 24px;
    }

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

    .link-cloud a {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 8px 12px;
      border-radius: 999px;
      background: var(--surface-soft);
      color: #344141;
      font-size: 13px;
      border: 1px solid rgba(76, 117, 104, 0.12);
      transition: background 0.2s ease, color 0.2s ease;
    }

    .link-cloud a:hover {
      background: var(--brand);
      color: #ffffff;
    }

    .site-footer {
      background: #eff4f1;
      color: #283535;
      border-top: 1px solid var(--line);
      padding: 28px 0;
    }

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

    .footer-text {
      display: grid;
      gap: 4px;
      font-size: 14px;
      color: #405050;
    }

    .footer-text strong {
      color: #1f2a2a;
      font-size: 15px;
    }

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

    .footer-links a {
      color: #2f5b50;
      font-size: 14px;
      font-weight: 700;
    }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 46px;
      height: 46px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: #ffffff;
      color: var(--brand-dark);
      box-shadow: 0 14px 30px rgba(47, 91, 80, 0.15);
      cursor: pointer;
      display: none;
      font-size: 20px;
      z-index: 15;
    }

    .back-top.show {
      display: grid;
      place-items: center;
    }

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

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

    @media (max-width: 980px) {
      .nav-links {
        position: fixed;
        inset: 72px 16px auto 16px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        border-radius: 22px;
        background: #ffffff;
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

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

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

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

      .hero-card {
        animation: none;
      }

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

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

    @media (max-width: 680px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      section {
        padding: 38px 0;
      }

      .hero {
        padding-top: 34px;
      }

      .brand-name span {
        display: none;
      }

      .quick-note,
      .service-grid,
      .policy-grid,
      .qr-grid {
        grid-template-columns: 1fr;
      }

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

      .btn {
        width: 100%;
      }

      .hero-card,
      .solution-aside,
      .guarantee-panel,
      .contact-card,
      .links-panel {
        border-radius: 22px;
      }

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

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

      h1 {
        letter-spacing: -0.035em;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        animation: none !important;
        transition: none !important;
      }
    }