:root {
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --accent: #06b6d4;
      --accent-glow: #38bdf8;
      --secondary: #6366f1;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #93c5fd;
      --card-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --card-shadow-hover: 0 20px 30px -10px rgba(2, 132, 199, 0.16), 0 10px 15px -5px rgba(15, 23, 42, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      background-image: radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.06) 0%, transparent 40%),
                        radial-gradient(circle at 85% 65%, rgba(99, 102, 241, 0.05) 0%, transparent 45%);
      background-attachment: fixed;
      min-width: 320px;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
      object-fit: contain;
    }

    .brand-title-wrap {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    .brand-desc {
      font-size: 0.72rem;
      color: var(--text-sub);
      font-weight: 500;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.94rem;
      font-weight: 600;
      color: var(--text-muted);
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(2, 132, 199, 0.08);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.28);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(2, 132, 199, 0.38);
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--primary);
      border-color: var(--border-focus);
    }

    .btn-secondary:hover {
      background: rgba(2, 132, 199, 0.06);
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      color: var(--text-main);
    }

    .nav-toggle svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    /* Section Global */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(2, 132, 199, 0.1);
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero Section (NO IMAGES PER RULE) */
    .hero-section {
      padding: 75px 0 65px 0;
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-shapes {
      position: absolute;
      inset: 0;
      pointer-events: none;
      overflow: hidden;
    }

    .hero-shape {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.45;
    }

    .hero-shape-1 {
      width: 450px;
      height: 450px;
      background: rgba(6, 182, 212, 0.2);
      top: -100px;
      left: 10%;
    }

    .hero-shape-2 {
      width: 400px;
      height: 400px;
      background: rgba(99, 102, 241, 0.18);
      top: 20%;
      right: 5%;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-content {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-focus);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 20px;
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.08);
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-hero-official {
      background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
      color: #ffffff;
      font-size: 1.08rem;
      padding: 14px 34px;
      border-radius: var(--radius-sm);
      box-shadow: 0 8px 24px rgba(2, 132, 199, 0.35);
      border: none;
    }

    .btn-hero-official:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(2, 132, 199, 0.45);
    }

    .hero-highlights {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .hero-highlight-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .hero-highlight-item svg {
      width: 16px;
      height: 16px;
      fill: var(--primary);
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      position: relative;
    }

    .visual-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 20px;
    }

    .visual-card-title {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .visual-card-status {
      font-size: 0.78rem;
      color: #059669;
      background: #ecfdf5;
      padding: 4px 10px;
      border-radius: 999px;
      font-weight: 700;
    }

    .visual-stat-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }

    .visual-stat-box {
      background: var(--bg-alt);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(226, 232, 240, 0.8);
    }

    .stat-label {
      font-size: 0.8rem;
      color: var(--text-sub);
      margin-bottom: 4px;
    }

    .stat-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .visual-models-taglist {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 15px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* Model Logos Matrix */
    .model-bar-section {
      padding: 24px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }

    .model-bar-inner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 10px 16px;
    }

    .model-bar-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-sub);
      margin-right: 8px;
    }

    .model-pill {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--text-muted);
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 5px 12px;
      border-radius: 999px;
      transition: var(--transition);
    }

    .model-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #ffffff;
      transform: translateY(-2px);
    }

    /* Feature Cards & Grid */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .cards-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--border-focus);
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, rgba(2, 132, 199, 0.12) 0%, rgba(6, 182, 212, 0.12) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .card-icon-wrap svg {
      width: 26px;
      height: 26px;
      fill: currentColor;
    }

    .card-title {
      font-size: 1.22rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.35;
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
    }

    .mini-tag {
      font-size: 0.75rem;
      background: var(--bg-alt);
      color: var(--text-sub);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* Comparison Table */
    .compare-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--card-shadow);
      margin-bottom: 30px;
    }

    .compare-score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: linear-gradient(135deg, #f0fdf4 0%, #e0f2fe 100%);
      border: 1px solid #bbf7d0;
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 28px;
      gap: 16px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .score-title {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .score-right {
      display: flex;
      align-items: baseline;
      gap: 6px;
    }

    .score-val {
      font-size: 2.3rem;
      font-weight: 900;
      color: var(--primary);
    }

    .score-total {
      font-size: 1rem;
      color: var(--text-sub);
      font-weight: 700;
    }

    .table-responsive {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

    .compare-table th {
      background: var(--bg-alt);
      color: var(--text-main);
      font-weight: 800;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table .highlight-col {
      background: rgba(2, 132, 199, 0.03);
      font-weight: 700;
      color: var(--primary);
    }

    .tag-green {
      color: #059669;
      background: #d1fae5;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 700;
    }

    .tag-gray {
      color: var(--text-sub);
      background: #f1f5f9;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
    }

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

    .timeline-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--card-shadow);
    }

    .timeline-step {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--accent-glow);
      line-height: 1;
      margin-bottom: 12px;
    }

    .timeline-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .timeline-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Media & Cases Showcases */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }

    .media-thumb-box {
      width: 100%;
      background: #e2e8f0;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-thumb-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-thumb-box img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .review-avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .review-user-info {
      display: flex;
      flex-direction: column;
    }

    .review-user-name {
      font-size: 0.98rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .review-user-role {
      font-size: 0.78rem;
      color: var(--primary);
      font-weight: 600;
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      font-style: italic;
    }

    .review-stars {
      margin-top: 14px;
      color: #f59e0b;
      font-size: 0.85rem;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--border-focus);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      width: 20px;
      height: 20px;
      transition: transform 0.3s ease;
      fill: var(--text-sub);
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      fill: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: var(--bg-alt);
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 20px 24px;
      max-height: 350px;
      border-top: 1px solid var(--border-color);
    }

    /* Contact Form & Info Grid */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: stretch;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.94rem;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 110px;
    }

    .contact-info-card {
      background: linear-gradient(145deg, #ffffff 0%, var(--bg-alt) 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-method-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-bottom: 24px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: rgba(2, 132, 199, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .contact-icon svg {
      width: 20px;
      height: 20px;
      fill: currentColor;
    }

    .contact-detail-title {
      font-size: 0.84rem;
      color: var(--text-sub);
      font-weight: 600;
    }

    .contact-detail-val {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .qr-box-wrap {
      display: flex;
      align-items: center;
      gap: 18px;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-box-wrap img {
      width: 85px;
      height: 85px;
      object-fit: cover;
      border-radius: 6px;
      border: 1px solid var(--border-color);
    }

    .qr-text-info h4 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .qr-text-info p {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* Articles & Links Section */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 14px;
      margin-top: 20px;
    }

    .article-link-chip {
      display: block;
      padding: 12px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-size: 0.88rem;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-link-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.1);
      transform: translateY(-2px);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .friend-links-wrap a {
      color: var(--text-muted);
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.84rem;
      text-decoration: none;
      transition: var(--transition);
      font-weight: 600;
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: #ffffff;
    }

    /* Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--text-muted);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-list li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .footer-list li a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      font-size: 0.84rem;
      color: var(--text-sub);
      flex-wrap: wrap;
      gap: 12px;
    }

    .ai-page-home-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 700;
    }

    /* Float Service & Back to Top */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      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 16px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-3px);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-3 {
        grid-template-columns: 1fr;
      }
      .cards-grid-2 {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.06);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
      .nav-toggle {
        display: block;
      }
      .header-actions .btn-secondary {
        display: none;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }