:root {
      --bg: #f3f9ff;
      --bg-soft: #eaf5ff;
      --surface: rgba(255, 255, 255, 0.86);
      --surface-solid: #ffffff;
      --text: #10233f;
      --muted: #58708d;
      --line: rgba(56, 128, 190, 0.18);
      --blue: #1469d8;
      --blue-deep: #0d458d;
      --cyan: #38bdf8;
      --ice: #dff5ff;
      --shadow: 0 18px 45px rgba(22, 89, 151, 0.12);
      --radius-lg: 28px;
      --radius-md: 20px;
      --radius-sm: 14px;
      --container: 1160px;
      --pad: clamp(18px, 4vw, 32px);
    }

    * {
      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% 0%, rgba(70, 185, 255, 0.22), transparent 32%),
        radial-gradient(circle at 92% 16%, rgba(31, 99, 218, 0.16), transparent 30%),
        linear-gradient(180deg, #f8fcff 0%, var(--bg) 44%, #ffffff 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% - var(--pad) * 2, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(18px);
      background: rgba(247, 252, 255, 0.84);
      border-bottom: 1px solid var(--line);
    }

    .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;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #ffffff;
      font-size: 24px;
      background: linear-gradient(135deg, #0d57ba 0%, #43c7ff 100%);
      box-shadow: 0 12px 26px rgba(20, 105, 216, 0.25);
    }

    .brand-name {
      display: flex;
      flex-direction: column;
      line-height: 1.15;
    }

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

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .nav-links a {
      padding: 10px 13px;
      border-radius: 999px;
      color: #29445f;
      font-size: 14px;
      font-weight: 650;
      transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .nav-links a:hover {
      background: rgba(20, 105, 216, 0.09);
      color: var(--blue-deep);
      transform: translateY(-1px);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      border-radius: 999px;
      padding: 11px 18px;
      font-size: 15px;
      font-weight: 750;
      cursor: pointer;
      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, #105fd0 0%, #35bff4 100%);
      box-shadow: 0 14px 30px rgba(20, 105, 216, 0.24);
    }

    .btn-primary:hover {
      box-shadow: 0 18px 38px rgba(20, 105, 216, 0.3);
    }

    .btn-secondary {
      color: var(--blue-deep);
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(20, 105, 216, 0.18);
    }

    .hero {
      padding: clamp(48px, 8vw, 86px) 0 36px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.94fr);
      gap: clamp(24px, 5vw, 54px);
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(20, 105, 216, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--blue-deep);
      font-size: 13px;
      font-weight: 760;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--cyan);
      box-shadow: 0 0 0 5px rgba(56, 189, 248, 0.16);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #0b2340;
    }

    .hero-text {
      margin: 0;
      max-width: 660px;
      color: var(--muted);
      font-size: clamp(16px, 2vw, 18px);
    }

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

    .hero-note {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      color: #3e5c78;
      font-size: 14px;
    }

    .hero-note span {
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(20, 105, 216, 0.12);
    }

    .hero-visual {
      position: relative;
      padding: 16px;
      border-radius: 34px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(223, 245, 255, 0.72)),
        radial-gradient(circle at 20% 20%, rgba(52, 211, 255, 0.35), transparent 45%);
      box-shadow: var(--shadow);
      border: 1px solid rgba(96, 165, 250, 0.22);
      overflow: hidden;
    }

    .hero-visual::before {
      content: "";
      position: absolute;
      inset: -28% auto auto -16%;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(56, 189, 248, 0.28);
      filter: blur(8px);
      animation: floatGlow 7s ease-in-out infinite;
    }

    .phone-frame {
      position: relative;
      z-index: 1;
      aspect-ratio: 4 / 3;
      border-radius: 26px;
      overflow: hidden;
      background: #dbeafe;
      border: 1px solid rgba(13, 69, 141, 0.14);
    }

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

    .price-panel {
      position: relative;
      z-index: 2;
      margin-top: 14px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .price-chip {
      padding: 14px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid rgba(20, 105, 216, 0.14);
    }

    .price-chip strong {
      display: block;
      color: #0d458d;
      font-size: 15px;
      margin-bottom: 4px;
    }

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

    section {
      padding: clamp(34px, 6vw, 62px) 0;
    }

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

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-kicker {
      color: var(--blue);
      font-size: 14px;
      font-weight: 820;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    h2 {
      margin: 8px 0 10px;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.2;
      letter-spacing: -0.03em;
      color: #10233f;
    }

    h3 {
      margin: 0 0 8px;
      font-size: 18px;
      line-height: 1.35;
      color: #10233f;
    }

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

    .glass-band {
      border-radius: var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(226, 246, 255, 0.74)),
        radial-gradient(circle at 88% 12%, rgba(56, 189, 248, 0.18), transparent 35%);
      border: 1px solid rgba(96, 165, 250, 0.18);
      box-shadow: var(--shadow);
      padding: clamp(20px, 4vw, 34px);
    }

    .toc {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 22px;
    }

    .toc a {
      min-height: 42px;
      display: inline-flex;
      align-items: center;
      padding: 9px 13px;
      border-radius: 999px;
      color: #24415f;
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(20, 105, 216, 0.13);
      font-size: 14px;
      font-weight: 700;
    }

    .answer-grid {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
      gap: 18px;
      align-items: stretch;
    }

    .answer-card {
      padding: 22px;
      border-radius: 24px;
      background: var(--surface-solid);
      border: 1px solid rgba(20, 105, 216, 0.12);
      box-shadow: 0 12px 32px rgba(32, 105, 164, 0.08);
    }

    .answer-card.feature {
      background: linear-gradient(145deg, #0f5fcb, #32b9f3);
      color: #ffffff;
      overflow: hidden;
      position: relative;
    }

    .answer-card.feature::after {
      content: "";
      position: absolute;
      right: -34px;
      bottom: -42px;
      width: 150px;
      height: 150px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.16);
    }

    .answer-card.feature h3,
    .answer-card.feature p {
      color: #ffffff;
    }

    .answer-card p {
      margin: 0;
      color: var(--muted);
    }

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

    .factor-list li {
      display: flex;
      gap: 12px;
      padding: 13px;
      border-radius: 16px;
      background: rgba(239, 248, 255, 0.78);
      border: 1px solid rgba(20, 105, 216, 0.1);
    }

    .factor-list b {
      flex: 0 0 auto;
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border-radius: 10px;
      background: #dff5ff;
      color: var(--blue-deep);
      font-size: 14px;
    }

    .factor-list span {
      color: #45617d;
      font-size: 15px;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .service-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.88);
      border: 1px solid rgba(20, 105, 216, 0.12);
      box-shadow: 0 10px 26px rgba(30, 92, 150, 0.07);
      transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 18px 36px rgba(30, 92, 150, 0.12);
      border-color: rgba(20, 105, 216, 0.28);
    }

    .service-icon {
      width: 42px;
      height: 42px;
      margin-bottom: 14px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: var(--blue-deep);
      background: linear-gradient(135deg, #dff5ff, #edf7ff);
      font-size: 21px;
    }

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

    .solution-wrap {
      display: grid;
      grid-template-columns: minmax(280px, 0.86fr) minmax(0, 1.14fr);
      gap: 22px;
      align-items: start;
    }

    .image-stack {
      display: grid;
      gap: 12px;
    }

    .repair-photo {
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid rgba(20, 105, 216, 0.12);
      background: #eaf5ff;
      box-shadow: 0 12px 28px rgba(30, 92, 150, 0.1);
    }

    .repair-photo img {
      width: 100%;
      aspect-ratio: 16 / 11;
      object-fit: cover;
    }

    .steps {
      display: grid;
      gap: 14px;
    }

    .step-item {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      padding: 18px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid rgba(20, 105, 216, 0.12);
    }

    .step-no {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      color: #ffffff;
      background: linear-gradient(135deg, #1469d8, #38bdf8);
      font-weight: 800;
    }

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

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

    .warranty-item {
      padding: 18px;
      border-radius: 20px;
      background: #ffffff;
      border: 1px solid rgba(20, 105, 216, 0.12);
    }

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

    .contact-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 0.56fr);
      gap: 18px;
      align-items: stretch;
    }

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

    .info-row {
      padding: 18px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.88);
      border: 1px solid rgba(20, 105, 216, 0.12);
    }

    .info-row strong {
      display: block;
      margin-bottom: 4px;
      color: #0d458d;
      font-size: 15px;
    }

    .info-row span,
    .info-row a {
      color: #29445f;
      font-weight: 650;
    }

    .qr-card {
      padding: 18px;
      border-radius: 24px;
      background: #ffffff;
      border: 1px solid rgba(20, 105, 216, 0.12);
      text-align: center;
    }

    .qr-card img {
      width: min(100%, 230px);
      margin: 0 auto 12px;
      border-radius: 18px;
      border: 1px solid rgba(20, 105, 216, 0.12);
      background: #f8fcff;
    }

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

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(20, 105, 216, 0.12);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 16px 18px;
      border: 0;
      background: transparent;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      text-align: left;
      color: #10233f;
      font-size: 16px;
      font-weight: 780;
      cursor: pointer;
    }

    .faq-question span:last-child {
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--blue-deep);
      background: #eaf5ff;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      display: block;
      animation: fadeIn 0.25s ease both;
    }

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

    .links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }

    .links-grid a {
      padding: 12px 14px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.84);
      border: 1px solid rgba(20, 105, 216, 0.1);
      color: #24415f;
      font-size: 14px;
      transition: color 0.2s ease, background 0.2s ease;
    }

    .links-grid a:hover {
      color: var(--blue-deep);
      background: #ffffff;
    }

    .site-footer {
      margin-top: 18px;
      background: #082443;
      color: #dbeafe;
    }

    .footer-inner {
      padding: 28px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .footer-brand .brand-mark {
      width: 38px;
      height: 38px;
      font-size: 22px;
      box-shadow: none;
    }

    .footer-text strong {
      display: block;
      color: #ffffff;
      line-height: 1.2;
    }

    .footer-text span {
      color: #bfdbfe;
      font-size: 13px;
    }

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

    .footer-links a {
      color: #dbeafe;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: #7dd3fc;
    }

    .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: translate(0, 0) scale(1);
      }
      50% {
        transform: translate(22px, 18px) scale(1.08);
      }
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 980px) {
      .nav-links {
        position: fixed;
        left: var(--pad);
        right: var(--pad);
        top: 78px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        border-radius: 22px;
        background: rgba(255, 255, 255, 0.96);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

      .nav-links a {
        border-radius: 14px;
      }

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

      .nav-actions .btn-primary {
        display: none;
      }

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

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

      .hero-visual {
        max-width: 680px;
        margin: 0 auto;
      }
    }

    @media (max-width: 680px) {
      :root {
        --pad: 18px;
      }

      .nav {
        min-height: 66px;
      }

      .brand-name span {
        display: none;
      }

      .hero {
        padding-top: 34px;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .price-panel,
      .service-grid,
      .warranty-grid,
      .links-grid {
        grid-template-columns: 1fr;
      }

      .glass-band {
        border-radius: 24px;
      }

      .step-item {
        grid-template-columns: 1fr;
      }

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

      .footer-links {
        justify-content: flex-start;
      }
    }

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

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

      .reveal {
        opacity: 1;
        transform: none;
      }
    }