:root {
      --bg: #f7fbff;
      --bg-soft: #eef7ff;
      --text: #182235;
      --muted: #5e6d82;
      --brand: #1d6fff;
      --brand-2: #38c7d4;
      --brand-3: #9d7bff;
      --line: rgba(38, 90, 140, 0.14);
      --card: rgba(255, 255, 255, 0.78);
      --card-solid: #ffffff;
      --shadow: 0 22px 60px rgba(33, 88, 145, 0.13);
      --radius-xl: 30px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --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% 8%, rgba(56, 199, 212, 0.20), transparent 34%),
        radial-gradient(circle at 86% 12%, rgba(157, 123, 255, 0.18), transparent 30%),
        linear-gradient(135deg, #fbfdff 0%, #eef7ff 45%, #f8fbff 100%);
      line-height: 1.72;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background:
        linear-gradient(110deg, rgba(255, 255, 255, 0.55), transparent 28%, rgba(255, 255, 255, 0.35) 48%, transparent 72%),
        radial-gradient(circle at 50% 100%, rgba(29, 111, 255, 0.08), transparent 34%);
      animation: ambientMove 14s ease-in-out infinite alternate;
      z-index: -1;
    }

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

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

    .container {
      width: min(var(--container), calc(100% - 36px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(247, 251, 255, 0.78);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(50, 104, 150, 0.10);
    }

    .nav {
      min-height: 76px;
      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: 0.02em;
    }

    .brand-mark {
      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(29, 111, 255, 0.24);
      font-size: 23px;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      gap: 1px;
    }

    .brand-text strong {
      font-size: 17px;
      color: #142033;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 6px;
      flex: 1 1 auto;
    }

    .nav-links a {
      padding: 9px 13px;
      border-radius: 999px;
      color: #26364c;
      font-size: 14px;
      font-weight: 650;
      transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--brand);
      background: rgba(29, 111, 255, 0.08);
      transform: translateY(-1px);
    }

    .nav-cta {
      flex: 0 0 auto;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 18px;
      border-radius: 999px;
      color: #ffffff;
      font-weight: 750;
      background: linear-gradient(135deg, var(--brand), #34bfe2);
      box-shadow: 0 14px 30px rgba(29, 111, 255, 0.22);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(29, 111, 255, 0.30);
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.82);
      color: var(--text);
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 4px auto;
      border-radius: 2px;
      background: #1e2d42;
      transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .mobile-panel {
      display: none;
      padding: 0 0 18px;
    }

    .mobile-panel a {
      display: block;
      padding: 12px 14px;
      margin-top: 8px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(38, 90, 140, 0.10);
      color: #203049;
      font-weight: 650;
    }

    .hero {
      padding: 58px 0 34px;
    }

    .hero-wrap {
      display: grid;
      grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
      gap: 28px;
      align-items: stretch;
    }

    .hero-copy {
      position: relative;
      padding: 42px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.84), rgba(240, 249, 255, 0.74)),
        linear-gradient(135deg, rgba(29, 111, 255, 0.08), rgba(56, 199, 212, 0.08));
      border: 1px solid rgba(255, 255, 255, 0.88);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-copy::after {
      content: "";
      position: absolute;
      width: 220px;
      height: 220px;
      right: -70px;
      top: -80px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(56, 199, 212, 0.28), transparent 68%);
      pointer-events: none;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 18px;
      padding: 8px 13px;
      border: 1px solid rgba(29, 111, 255, 0.16);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.66);
      color: #245c9f;
      font-size: 13px;
      font-weight: 750;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand-2), var(--brand));
      box-shadow: 0 0 0 5px rgba(56, 199, 212, 0.16);
    }

    h1 {
      margin: 0;
      max-width: 720px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -0.045em;
      color: #101b2d;
    }

    .hero-copy p {
      margin: 20px 0 0;
      max-width: 720px;
      color: #42546d;
      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: 48px;
      padding: 0 20px;
      border-radius: 999px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #1467ff, #27c3d8);
      box-shadow: 0 18px 36px rgba(29, 111, 255, 0.25);
    }

    .btn-secondary {
      color: #19304f;
      background: rgba(255, 255, 255, 0.76);
      border-color: rgba(38, 90, 140, 0.14);
    }

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

    .hero-note {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .hero-note span {
      padding: 7px 11px;
      border-radius: 999px;
      background: rgba(29, 111, 255, 0.07);
      color: #315576;
      font-size: 13px;
      font-weight: 700;
    }

    .quote-panel {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .glass-card {
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: var(--shadow);
      backdrop-filter: blur(18px);
    }

    .pricing-card {
      padding: 28px;
    }

    .pricing-card h2 {
      margin: 0;
      font-size: 24px;
      line-height: 1.25;
      letter-spacing: -0.02em;
    }

    .pricing-card p {
      margin: 12px 0 0;
      color: var(--muted);
    }

    .price-factors {
      display: grid;
      gap: 10px;
      margin-top: 20px;
    }

    .factor {
      display: grid;
      grid-template-columns: 28px 1fr;
      gap: 10px;
      align-items: start;
      padding: 12px;
      border-radius: 16px;
      background: rgba(245, 250, 255, 0.86);
      border: 1px solid rgba(38, 90, 140, 0.10);
    }

    .factor b {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 10px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      font-size: 13px;
    }

    .factor span {
      color: #40536b;
      font-size: 14px;
    }

    .shop-strip {
      padding: 20px;
      display: grid;
      gap: 10px;
    }

    .shop-strip strong {
      font-size: 18px;
    }

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

    .shop-strip a {
      color: #0f65d7;
      font-weight: 750;
    }

    .section {
      padding: 34px 0;
    }

    .section-heading {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 24px;
      margin-bottom: 22px;
    }

    .section-heading h2 {
      margin: 0;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.035em;
      color: #122035;
    }

    .section-heading p {
      margin: 0;
      max-width: 560px;
      color: var(--muted);
    }

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

    .service-card {
      position: relative;
      min-height: 190px;
      padding: 22px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.74);
      border: 1px solid rgba(38, 90, 140, 0.12);
      box-shadow: 0 16px 40px rgba(33, 88, 145, 0.08);
      overflow: hidden;
      transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    }

    .service-card::before {
      content: "";
      position: absolute;
      inset: auto 18px 18px auto;
      width: 72px;
      height: 72px;
      border-radius: 24px;
      background: linear-gradient(135deg, rgba(29, 111, 255, 0.12), rgba(56, 199, 212, 0.18));
      transform: rotate(12deg);
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: rgba(29, 111, 255, 0.24);
      box-shadow: 0 20px 48px rgba(33, 88, 145, 0.14);
    }

    .service-card .icon {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 14px;
      color: #0f65d7;
      background: linear-gradient(135deg, rgba(29, 111, 255, 0.12), rgba(56, 199, 212, 0.12));
      font-weight: 900;
    }

    .service-card h3 {
      position: relative;
      margin: 0 0 9px;
      font-size: 18px;
      color: #15243a;
    }

    .service-card p {
      position: relative;
      margin: 0;
      color: #607088;
      font-size: 14px;
    }

    .solution-wrap {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 18px;
      align-items: start;
    }

    .image-card {
      overflow: hidden;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.74);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: var(--shadow);
    }

    .image-box {
      aspect-ratio: 4 / 3;
      background: linear-gradient(135deg, rgba(29, 111, 255, 0.08), rgba(56, 199, 212, 0.10));
      display: grid;
      place-items: center;
      overflow: hidden;
    }

    .image-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 12px;
    }

    .image-card-content {
      padding: 20px;
    }

    .image-card-content h3 {
      margin: 0 0 8px;
      font-size: 20px;
    }

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

    .step-list {
      display: grid;
      gap: 13px;
      padding: 24px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: var(--shadow);
    }

    .step {
      display: grid;
      grid-template-columns: 52px 1fr;
      gap: 15px;
      align-items: start;
      padding: 16px;
      border-radius: 19px;
      background: rgba(247, 251, 255, 0.88);
      border: 1px solid rgba(38, 90, 140, 0.10);
    }

    .step-number {
      height: 52px;
      display: grid;
      place-items: center;
      border-radius: 17px;
      color: #ffffff;
      background: linear-gradient(135deg, var(--brand-3), var(--brand));
      font-weight: 900;
      box-shadow: 0 10px 22px rgba(29, 111, 255, 0.18);
    }

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

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

    .guarantee-band {
      padding: 28px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(236, 248, 255, 0.72)),
        radial-gradient(circle at 96% 0%, rgba(56, 199, 212, 0.22), transparent 32%);
      border: 1px solid rgba(255, 255, 255, 0.88);
      box-shadow: var(--shadow);
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
      margin-top: 18px;
    }

    .guarantee-item {
      padding: 18px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(38, 90, 140, 0.10);
    }

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

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

    .contact-card {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      padding: 28px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(255, 255, 255, 0.86);
      box-shadow: var(--shadow);
    }

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

    .contact-line {
      padding: 16px;
      border-radius: 18px;
      background: rgba(247, 251, 255, 0.9);
      border: 1px solid rgba(38, 90, 140, 0.10);
    }

    .contact-line b {
      display: block;
      margin-bottom: 3px;
      color: #142033;
    }

    .contact-line span,
    .contact-line a {
      color: #53657b;
    }

    .contact-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 18px;
      padding: 24px;
      border-radius: 22px;
      color: #ffffff;
      background:
        radial-gradient(circle at 85% 12%, rgba(255, 255, 255, 0.22), transparent 28%),
        linear-gradient(135deg, #1467ff, #25bdd5);
      box-shadow: 0 20px 48px rgba(29, 111, 255, 0.24);
    }

    .contact-panel h2 {
      margin: 0;
      font-size: 28px;
      line-height: 1.22;
      color: #ffffff;
    }

    .contact-panel p {
      margin: 10px 0 0;
      color: rgba(255, 255, 255, 0.88);
    }

    .contact-panel .btn {
      align-self: flex-start;
      color: #1455bd;
      background: #ffffff;
      border-color: rgba(255, 255, 255, 0.8);
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.76);
      border: 1px solid rgba(38, 90, 140, 0.12);
      box-shadow: 0 14px 34px rgba(33, 88, 145, 0.07);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 18px 20px;
      border: 0;
      background: transparent;
      color: #16243a;
      text-align: left;
      font: inherit;
      font-weight: 800;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question i {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(29, 111, 255, 0.10);
      color: #1467ff;
      font-style: normal;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 15px;
    }

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

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

    .resource-grid a {
      padding: 14px 15px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.70);
      border: 1px solid rgba(38, 90, 140, 0.10);
      color: #27435f;
      font-size: 14px;
      font-weight: 650;
      transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    }

    .resource-grid a:hover {
      transform: translateY(-2px);
      border-color: rgba(29, 111, 255, 0.24);
      color: #0f65d7;
    }

    .site-footer {
      margin-top: 28px;
      padding: 28px 0;
      background: #edf6ff;
      border-top: 1px solid rgba(38, 90, 140, 0.12);
      color: #27364a;
    }

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

    .footer-inner p {
      margin: 4px 0 0;
      color: #5d6d82;
      font-size: 14px;
    }

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

    .footer-links a {
      color: #29465f;
      font-size: 14px;
      font-weight: 650;
    }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(38, 90, 140, 0.12);
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.86);
      color: #1467ff;
      box-shadow: 0 12px 26px rgba(33, 88, 145, 0.16);
      cursor: pointer;
      opacity: 0;
      pointer-events: none;
      transform: translateY(8px);
      transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .back-top.show {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

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

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

    @keyframes ambientMove {
      from {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: 0.82;
      }
      to {
        transform: translate3d(0, -16px, 0) scale(1.04);
        opacity: 1;
      }
    }

    @media (max-width: 980px) {
      .nav-links,
      .nav-cta {
        display: none;
      }

      .menu-toggle {
        display: inline-block;
      }

      .mobile-panel.open {
        display: block;
      }

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

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

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

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

      .hero {
        padding-top: 34px;
      }

      .hero-copy,
      .pricing-card,
      .guarantee-band,
      .contact-card {
        padding: 22px;
        border-radius: 24px;
      }

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

      .btn {
        width: 100%;
      }

      .service-grid,
      .guarantee-grid,
      .resource-grid {
        grid-template-columns: 1fr;
      }

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

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

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