:root {
      --primary-yellow: #f5b301;
      --primary-light: #fff9e6;
      --primary-hover: #e09f00;
      --accent-dark: #1f2329;
      --accent-slate: #2b303a;
      --text-main: #1e2022;
      --text-muted: #5a626a;
      --text-light: #8c96a0;
      --bg-page: #fbfbfa;
      --bg-card: #ffffff;
      --border-color: #edebe4;
      --border-focus: #f5b301;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(245,179,1,0.12);
      --shadow-lg: 0 16px 36px rgba(31,35,41,0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-family);
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    header.site-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(0,0,0,0.02);
    }

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

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

    .brand-area .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--accent-dark);
      letter-spacing: -0.5px;
    }

    .brand-badge {
      background: var(--primary-yellow);
      color: var(--accent-dark);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
    }

    nav.main-nav {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 600;
      transition: color 0.2s ease;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #b58100;
      background-color: var(--primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 30px;
      text-decoration: none;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: 2px solid transparent;
      line-height: 1.2;
    }

    .btn-primary {
      background: var(--primary-yellow);
      color: var(--accent-dark);
      box-shadow: 0 4px 14px rgba(245, 179, 1, 0.4);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(245, 179, 1, 0.5);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--accent-dark);
      border-color: var(--accent-dark);
    }

    .btn-outline:hover {
      background: var(--accent-dark);
      color: #ffffff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--accent-dark);
      cursor: pointer;
      padding: 4px;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, #fff2c2 0%, #fffdf5 45%, #fbfbfa 85%);
      padding: 70px 0 60px;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid #ffd778;
      color: #a87400;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.8rem;
      line-height: 1.2;
      font-weight: 900;
      color: var(--accent-dark);
      margin-bottom: 18px;
      letter-spacing: -0.8px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #f5b301 0%, #e08b00 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
    }

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

    .btn-hero-official {
      background: #1f2329;
      color: #f5b301;
      font-size: 1.05rem;
      padding: 14px 30px;
      border: 2px solid #1f2329;
    }

    .btn-hero-official:hover {
      background: #000000;
      color: #ffffff;
      border-color: #000000;
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px dashed #e6dec9;
    }

    .metric-item h4 {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--accent-dark);
    }

    .metric-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .hero-terminal-card {
      background: #ffffff;
      border: 2px solid #ffe394;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .card-badge-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border-color);
    }

    .card-badge-top span {
      font-size: 0.8rem;
      font-weight: 700;
      color: #8c6000;
      background: #fff8dc;
      padding: 4px 10px;
      border-radius: 6px;
    }

    .terminal-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .terminal-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #fdfaf3;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border-left: 4px solid var(--primary-yellow);
      font-size: 0.9rem;
    }

    .terminal-row strong {
      color: var(--accent-dark);
    }

    .terminal-row span.status {
      font-size: 0.75rem;
      color: #0f8a48;
      background: #e4f9ec;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* Common Section Styles */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

    .section-subtitle {
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      color: #b57a00;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
      background: var(--primary-light);
      padding: 3px 12px;
      border-radius: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--accent-dark);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* Supported Model Badges */
    .model-chip-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #ebd9a4;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent-dark);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--primary-yellow);
      border-color: var(--primary-yellow);
      transform: translateY(-2px);
    }

    /* Grid Layouts */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    /* Feature Cards */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      border-color: #ffd875;
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #fff6d9;
      color: #946400;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--accent-dark);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .feature-card .card-footer-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: #a87200;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Media Banner Grid */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .banner-gallery img,
    .case-visual img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: transform 0.3s ease;
      display: block;
    }

    .banner-gallery img:hover,
    .case-visual img:hover {
      transform: scale(1.02);
    }

    /* Steps Section */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      text-align: center;
    }

    .step-number {
      width: 36px;
      height: 36px;
      background: var(--primary-yellow);
      color: var(--accent-dark);
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
      font-size: 1rem;
    }

    .step-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Comparison Table Component */
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .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: 0.95rem;
    }

    .compare-table th {
      background: #fdfaf3;
      color: var(--accent-dark);
      font-weight: 700;
    }

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

    .compare-table tr td:nth-child(2) {
      background: #fffdf5;
      font-weight: 700;
      color: #996800;
    }

    .badge-star {
      background: #e15b00;
      color: #ffffff;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-left: 6px;
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

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

    .review-avatar {
      width: 44px;
      height: 44px;
      background: #fae4a8;
      color: #7a5000;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      font-size: 0.95rem;
    }

    .review-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--accent-dark);
    }

    .review-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-content {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ Component */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

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

    .faq-item:hover {
      border-color: #ffd875;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 22px;
      background: none;
      border: none;
      font-size: 1rem;
      font-weight: 700;
      color: var(--accent-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fffefb;
    }

    .faq-answer p {
      padding: 0 22px 18px;
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: #b58100;
      transition: transform 0.3s ease;
    }

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

    /* Form Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--accent-dark);
    }

    .contact-info p {
      color: var(--text-muted);
      margin-bottom: 24px;
      font-size: 0.95rem;
    }

    .contact-cards {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .c-card {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      background: #fdfaf3;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      color: var(--accent-dark);
    }

    .c-card strong {
      color: #996800;
      min-width: 70px;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #fff8e8;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px dashed #ffd466;
    }

    .qr-container img {
      width: 90px;
      height: 90px;
      border-radius: 6px;
      background: #ffffff;
      padding: 4px;
    }

    .qr-text h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--accent-dark);
      margin-bottom: 4px;
    }

    .qr-text p {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin: 0;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-dark);
      margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-family: inherit;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(245, 179, 1, 0.15);
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--primary-yellow);
      color: var(--accent-dark);
      font-weight: 800;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 1rem;
      transition: background 0.2s ease;
    }

    .btn-submit:hover {
      background: var(--primary-hover);
    }

    /* Article & Resource List */
    .article-links {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 20px;
    }

    .article-item {
      padding: 12px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.9rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s ease;
    }

    .article-item:hover {
      background: var(--primary-light);
      border-color: #ffd875;
      color: #996800;
    }

    /* Footer Styles */
    footer.site-footer {
      background: #191c20;
      color: #b0b8c4;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid #2d3239;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 20px;
      max-width: 320px;
      color: #9aa3af;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
    }

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

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

    .footer-links a {
      color: #9aa3af;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: var(--primary-yellow);
    }

    .footer-friend-links {
      padding: 24px 0;
      border-bottom: 1px solid #2d3239;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.85rem;
    }

    .footer-friend-links span {
      color: #ffffff;
      font-weight: 700;
    }

    .footer-friend-links a {
      color: #9aa3af;
      text-decoration: none;
      margin-right: 8px;
    }

    .footer-friend-links a:hover {
      color: var(--primary-yellow);
    }

    .footer-bottom {
      padding-top: 24px;
      text-align: center;
      font-size: 0.8rem;
      color: #717b88;
    }

    /* Floating Widget */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .tool-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid #e2ded5;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-dark);
      box-shadow: var(--shadow-md);
      cursor: pointer;
      text-decoration: none;
      transition: all 0.2s ease;
    }

    .tool-btn:hover {
      background: var(--primary-yellow);
      transform: scale(1.08);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .mobile-menu-btn {
        display: block;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 20px;
      }
      .main-nav.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .grid-4, .grid-3, .grid-2, .reviews-grid, .banner-gallery, .flow-steps, .article-links {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
    }