:root {
      --bg: #fff8f1;
      --bg-soft: #fffdf9;
      --text: #1f2937;
      --muted: #657083;
      --brand: #ff7a59;
      --brand-2: #7c5cff;
      --brand-3: #20b6a8;
      --line: rgba(73, 54, 40, 0.12);
      --card: rgba(255, 255, 255, 0.74);
      --shadow: 0 22px 70px rgba(121, 88, 65, 0.13);
      --radius: 28px;
      --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 8% 10%, rgba(255, 183, 135, 0.46), transparent 30%),
        radial-gradient(circle at 86% 4%, rgba(124, 92, 255, 0.22), transparent 28%),
        radial-gradient(circle at 72% 48%, rgba(32, 182, 168, 0.16), transparent 24%),
        linear-gradient(180deg, #fff8f1 0%, #fffdf9 42%, #f6fbff 100%);
      line-height: 1.7;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.56), transparent 72%);
      z-index: -1;
    }

    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;
      backdrop-filter: blur(18px);
      background: rgba(255, 250, 244, 0.82);
      border-bottom: 1px solid rgba(255, 255, 255, 0.74);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0.02em;
    }

    .logo {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      box-shadow: 0 12px 26px rgba(255, 122, 89, 0.28);
      font-size: 22px;
    }

    .brand-text {
      display: grid;
      line-height: 1.15;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
      color: #334155;
      font-size: 15px;
    }

    .nav-links a {
      padding: 8px 2px;
      position: relative;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 3px;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--brand), var(--brand-2));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.24s ease;
    }

    .nav-links a:hover::after {
      transform: scaleX(1);
    }

    .nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 18px;
      border-radius: 999px;
      color: #ffffff;
      background: linear-gradient(135deg, #ff7a59, #7c5cff);
      box-shadow: 0 14px 30px rgba(124, 92, 255, 0.22);
      font-weight: 700;
      white-space: nowrap;
    }

    .menu-btn {
      display: none;
      width: 42px;
      height: 42px;
      border: 0;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.82);
      color: var(--text);
      box-shadow: 0 10px 24px rgba(31, 41, 55, 0.08);
      cursor: pointer;
    }

    .menu-btn span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 4px auto;
      background: #1f2937;
      border-radius: 999px;
      transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .hero {
      padding: 64px 0 34px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.04fr) minmax(300px, 0.86fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      width: fit-content;
      padding: 8px 13px;
      border: 1px solid rgba(255, 122, 89, 0.22);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.68);
      color: #9a4b34;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 0 12px 26px rgba(255, 122, 89, 0.09);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--brand-3);
      box-shadow: 0 0 0 6px rgba(32, 182, 168, 0.13);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(32px, 7vw, 62px);
      line-height: 1.06;
      letter-spacing: -0.055em;
      color: #172033;
    }

    .lead {
      max-width: 680px;
      margin: 0;
      color: #4b5565;
      font-size: clamp(16px, 2vw, 19px);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 16px;
      border: 1px solid transparent;
      font-weight: 800;
      transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
    }

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

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #ff7757, #7d61ff);
      box-shadow: 0 18px 36px rgba(124, 92, 255, 0.24);
    }

    .btn-secondary {
      color: #273142;
      background: rgba(255, 255, 255, 0.76);
      border-color: rgba(39, 49, 66, 0.1);
      box-shadow: 0 14px 30px rgba(39, 49, 66, 0.07);
    }

    .quick-check {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin-top: 28px;
      max-width: 720px;
    }

    .quick-check div {
      padding: 14px 15px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.66);
      border: 1px solid rgba(255, 255, 255, 0.84);
      box-shadow: 0 10px 24px rgba(31, 41, 55, 0.06);
    }

    .quick-check strong {
      display: block;
      color: #172033;
      font-size: 15px;
    }

    .quick-check span {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: 13px;
    }

    .visual-card {
      position: relative;
      padding: 18px;
      border-radius: 34px;
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 242, 232, 0.68));
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .visual-card::before {
      content: "";
      position: absolute;
      width: 190px;
      height: 190px;
      right: -54px;
      top: -64px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(124, 92, 255, 0.28), transparent 70%);
      animation: floatGlow 7s ease-in-out infinite;
    }

    .phone-frame {
      position: relative;
      border-radius: 28px;
      overflow: hidden;
      background: #ffffff;
      border: 1px solid rgba(31, 41, 55, 0.08);
    }

    .phone-frame img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: contain;
      background: linear-gradient(160deg, #fff5ef, #eef8ff);
      padding: 18px;
    }

    .diagnosis-note {
      position: relative;
      display: grid;
      gap: 10px;
      margin-top: 14px;
      padding: 18px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(31, 41, 55, 0.08);
    }

    .diagnosis-note strong {
      color: #172033;
      font-size: 18px;
    }

    .diagnosis-note p {
      margin: 0;
      color: #5d6677;
      font-size: 14px;
    }

    section {
      padding: 42px 0;
    }

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

    .section-head h2 {
      margin: 0;
      color: #172033;
      font-size: clamp(25px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.025em;
    }

    .section-head p {
      max-width: 520px;
      margin: 0;
      color: var(--muted);
    }

    .toc {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 12px;
      padding: 16px;
      border-radius: 26px;
      background: rgba(255, 255, 255, 0.66);
      border: 1px solid rgba(255, 255, 255, 0.88);
      box-shadow: 0 18px 50px rgba(31, 41, 55, 0.07);
    }

    .toc a {
      padding: 14px;
      border-radius: 18px;
      color: #334155;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 250, 245, 0.66));
      border: 1px solid rgba(31, 41, 55, 0.06);
      font-weight: 700;
      transition: transform 0.22s ease, background 0.22s ease;
    }

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

    .decision-panel {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .decision-card {
      position: relative;
      padding: 24px;
      border-radius: var(--radius);
      background: var(--card);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: 0 18px 46px rgba(31, 41, 55, 0.08);
      overflow: hidden;
    }

    .decision-card::after {
      content: "";
      position: absolute;
      inset: auto 20px 0 auto;
      width: 90px;
      height: 5px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--brand), var(--brand-2));
      opacity: 0.55;
    }

    .decision-card h3 {
      margin: 0 0 10px;
      font-size: 22px;
      color: #172033;
    }

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

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

    .check-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #334155;
    }

    .check-list li::before {
      content: "";
      flex: 0 0 9px;
      width: 9px;
      height: 9px;
      margin-top: 9px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand-3), var(--brand-2));
    }

    .service-strip {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 18px;
      align-items: stretch;
    }

    .soft-box {
      padding: 24px;
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: 0 18px 46px rgba(31, 41, 55, 0.07);
    }

    .soft-box h3 {
      margin: 0 0 12px;
      color: #172033;
      font-size: 22px;
    }

    .soft-box p {
      margin: 0;
      color: var(--muted);
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .service-tags span {
      padding: 9px 12px;
      border-radius: 999px;
      color: #344154;
      background: rgba(255, 247, 239, 0.84);
      border: 1px solid rgba(255, 122, 89, 0.12);
      font-size: 14px;
      font-weight: 700;
    }

    .steps {
      counter-reset: step;
      display: grid;
      gap: 12px;
    }

    .step {
      counter-increment: step;
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      align-items: start;
      padding: 16px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.68);
      border: 1px solid rgba(31, 41, 55, 0.06);
    }

    .step::before {
      content: counter(step);
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      font-weight: 800;
    }

    .step strong {
      display: block;
      color: #172033;
    }

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

    .warranty-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .warranty-card {
      padding: 20px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.88);
      box-shadow: 0 14px 34px rgba(31, 41, 55, 0.06);
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }

    .warranty-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 44px rgba(31, 41, 55, 0.09);
    }

    .warranty-card h3 {
      margin: 0 0 8px;
      color: #172033;
      font-size: 18px;
    }

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

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

    .faq-item {
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(255, 255, 255, 0.9);
      box-shadow: 0 12px 28px rgba(31, 41, 55, 0.05);
      overflow: hidden;
    }

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

    .faq-question span:last-child {
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(255, 122, 89, 0.12);
      color: #b14b31;
      transition: transform 0.22s ease;
    }

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

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

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

    .contact-card {
      display: grid;
      grid-template-columns: 1fr 280px;
      gap: 18px;
      align-items: stretch;
      padding: 22px;
      border-radius: 34px;
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(255, 244, 235, 0.7)),
        radial-gradient(circle at 88% 18%, rgba(124, 92, 255, 0.18), transparent 34%);
      border: 1px solid rgba(255, 255, 255, 0.9);
      box-shadow: var(--shadow);
    }

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

    .contact-row {
      padding: 15px 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(31, 41, 55, 0.06);
    }

    .contact-row strong {
      display: block;
      color: #172033;
      margin-bottom: 2px;
    }

    .contact-row span,
    .contact-row a {
      color: #4b5565;
    }

    .qr-box {
      display: grid;
      gap: 12px;
      align-content: center;
      justify-items: center;
      padding: 18px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(31, 41, 55, 0.08);
      text-align: center;
    }

    .qr-box img {
      width: 180px;
      border-radius: 18px;
      background: #ffffff;
      padding: 8px;
      box-shadow: 0 10px 26px rgba(31, 41, 55, 0.08);
    }

    .qr-box strong {
      color: #172033;
    }

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

    .summary-box {
      padding: 24px;
      border-radius: var(--radius);
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.76), rgba(239, 248, 255, 0.7));
      border: 1px solid rgba(255, 255, 255, 0.9);
      box-shadow: 0 16px 42px rgba(31, 41, 55, 0.06);
    }

    .summary-box p {
      margin: 0;
      color: #4b5565;
    }

    .links-panel {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px 18px;
      padding: 20px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.62);
      border: 1px solid rgba(255, 255, 255, 0.86);
    }

    .links-panel a {
      color: #36506d;
      font-size: 14px;
      line-height: 1.5;
    }

    .links-panel a:hover {
      color: #7c5cff;
    }

    .site-footer {
      margin-top: 18px;
      padding: 28px 0;
      background: #fff7ef;
      border-top: 1px solid rgba(73, 54, 40, 0.12);
      color: #334155;
    }

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

    .footer-inner p {
      margin: 0;
      color: #5d6677;
      font-size: 14px;
    }

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

    .footer-links a {
      color: #334155;
    }

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

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

    @keyframes floatGlow {
      0%, 100% {
        transform: translate3d(0, 0, 0) scale(1);
      }
      50% {
        transform: translate3d(-18px, 16px, 0) scale(1.08);
      }
    }

    @media (max-width: 920px) {
      .menu-btn {
        display: inline-block;
      }

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

      .site-header.open .nav {
        flex-wrap: wrap;
      }

      .site-header.open .nav-links {
        order: 3;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
        gap: 8px;
        padding: 0 0 14px;
      }

      .site-header.open .nav-links a {
        padding: 12px 14px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.72);
      }

      .hero {
        padding-top: 38px;
      }

      .hero-grid,
      .service-strip,
      .contact-card {
        grid-template-columns: 1fr;
      }

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

      .contact-card {
        padding: 18px;
      }

      .qr-box {
        justify-items: start;
        text-align: left;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .nav {
        min-height: 64px;
      }

      .brand-text small {
        display: none;
      }

      .hero {
        padding-bottom: 24px;
      }

      .quick-check,
      .decision-panel,
      .toc,
      .warranty-grid,
      .links-panel {
        grid-template-columns: 1fr;
      }

      .section-head {
        display: grid;
        gap: 10px;
      }

      section {
        padding: 32px 0;
      }

      .btn {
        width: 100%;
      }

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

      .site-header.open .nav-links {
        grid-template-columns: 1fr;
      }
    }