:root {
      --primary: #ff4d4f;
      --primary-gradient: linear-gradient(135deg, #ff5722 0%, #ff8f00 50%, #4facfe 100%);
      --bg-gradient: linear-gradient(180deg, #fffbf9 0%, #f6f9fc 100%);
      --accent: #2b5876;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --card-bg: #ffffff;
      --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
      --hover-shadow: 0 20px 40px -5px rgba(255, 87, 34, 0.12);
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background: var(--bg-gradient);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
    }

    .logo-box img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: 6px;
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: #ff5722;
      background: rgba(255, 87, 34, 0.06);
    }

    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 30px;
      cursor: pointer;
      transition: all 0.3s ease;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #ff5722 0%, #ff8f00 100%);
      color: #fff;
      box-shadow: 0 4px 15px rgba(255, 87, 34, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #f4511e 0%, #e65100 100%);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 87, 34, 0.45);
      color: #fff;
    }

    .btn-outline {
      background: #ffffff;
      color: #ff5722;
      border-color: #ff5722;
    }

    .btn-outline:hover {
      background: #fff5f2;
      transform: translateY(-2px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
      background: radial-gradient(circle at 50% 20%, rgba(255, 143, 0, 0.12) 0%, rgba(79, 172, 254, 0.06) 50%, rgba(255, 255, 255, 0) 100%);
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      background: rgba(255, 87, 34, 0.1);
      color: #e65100;
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 24px;
      letter-spacing: 0.5px;
      border: 1px solid rgba(255, 87, 34, 0.2);
    }

    .hero-title {
      font-size: 40px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.9);
      padding: 24px 16px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: #ff5722;
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-subtitle {
      font-size: 13px;
      color: #ff5722;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1000px;
      margin: 0 auto 30px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: #ff5722;
      color: #ff5722;
      transform: translateY(-2px);
    }

    .platform-intro-box {
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--card-shadow);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-top: 30px;
    }

    .platform-intro-content h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0f172a;
    }

    .platform-feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .platform-feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 14px;
      color: #475569;
    }

    .platform-feature-list li span.dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #ff5722;
      margin-top: 8px;
      flex-shrink: 0;
    }

    .platform-side-img {
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 10px 25px rgba(0,0,0,0.08);
      background: #f8fafc;
    }

    .platform-side-img img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .platform-side-img img:hover {
      transform: scale(1.02);
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(255, 87, 34, 0.4);
    }

    .card-badge {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 12px;
      background: #fff0eb;
      color: #ff5722;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .review-score-hero {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      border-radius: 20px;
      padding: 36px;
      color: #ffffff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-info h3 {
      font-size: 22px;
      margin-bottom: 6px;
    }

    .score-info p {
      color: #94a3b8;
      font-size: 14px;
    }

    .score-digits {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-big {
      font-size: 52px;
      font-weight: 900;
      color: #ff9800;
      line-height: 1;
    }

    .score-stars {
      color: #ffb300;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #1e293b;
    }

    .comparison-table td.highlight {
      background: #fff8f6;
      color: #e65100;
      font-weight: 600;
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      position: relative;
      box-shadow: var(--card-shadow);
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff5722 0%, #ff8f00 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .case-content h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }

    .case-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 14px;
      flex-grow: 1;
    }

    .case-tags {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .case-tags span {
      font-size: 11px;
      background: #f1f5f9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
    }

    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: #1e293b;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

    .faq-question:hover {
      color: #ff5722;
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 300px;
    }

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

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .review-name {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }

    .review-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 14px;
      color: #475569;
      line-height: 1.6;
      flex-grow: 1;
    }

    .form-contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    .form-box h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 20px;
      color: #0f172a;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #334155;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: #ff5722;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-card-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 20px;
    }

    .contact-icon-bubble {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: #fff3ee;
      color: #ff5722;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .qr-wrapper {
      margin-top: 10px;
      text-align: center;
      background: #f8fafc;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      max-width: 220px;
    }

    .qr-wrapper img {
      width: 140px;
      height: 140px;
      object-fit: cover;
      margin-bottom: 8px;
      display: block;
      margin-left: auto;
      margin-right: auto;
    }

    .qr-label {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .articles-flex {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      transition: all 0.2s ease;
      display: block;
    }

    .article-item:hover {
      border-color: #ff5722;
      transform: translateY(-3px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .article-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .article-meta {
      font-size: 12px;
      color: #94a3b8;
    }

    footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 60px 0 30px;
      margin-top: 80px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 20px;
      color: #ffffff;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 14px;
      color: #94a3b8;
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 15px;
      color: #ffffff;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links li a {
      color: #94a3b8;
      font-size: 13px;
      transition: color 0.2s;
    }

    .footer-links li a:hover {
      color: #ff8f00;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 13px;
      color: #64748b;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links a {
      color: #94a3b8;
      font-size: 13px;
    }

    .friend-links a:hover {
      color: #ffffff;
    }

    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #1e293b;
      font-size: 13px;
      font-weight: 700;
      transition: all 0.25s;
    }

    .float-btn:hover {
      background: #ff5722;
      color: #ffffff;
      border-color: #ff5722;
      transform: translateY(-2px);
    }

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
      border: 1px solid var(--border-color);
      display: none;
      width: 150px;
      text-align: center;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .float-btn.kefu:hover + .float-qr-popup,
    .float-qr-popup:hover {
      display: block;
    }

    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .cases-grid, .reviews-grid, .articles-flex {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-intro-box {
        grid-template-columns: 1fr;
      }
      .form-contact-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
      }
      .nav-links.active li a {
        padding: 12px 16px;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 26px;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .cases-grid, .reviews-grid, .articles-flex, .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }