:root {
      --primary-orange: #ff5500;
      --secondary-orange: #ff7700;
      --accent-gold: #ffaa00;
      --deep-charcoal: #1c1917;
      --body-text: #292524;
      --muted-text: #57534e;
      --light-bg: #fffaf5;
      --card-bg: #ffffff;
      --border-color: #fed7aa;
      --warm-border: #ffedd5;
      --shadow-sm: 0 2px 4px rgba(255, 85, 0, 0.05);
      --shadow-md: 0 8px 24px rgba(255, 85, 0, 0.08);
      --shadow-lg: 0 16px 36px rgba(255, 85, 0, 0.12);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    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(--light-bg);
      color: var(--body-text);
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--warm-border);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .logo-container {
      display: flex;
      align-items: center;
      height: 48px;
    }

    .ai-page-logo {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--deep-charcoal);
      border-radius: 6px;
      white-space: nowrap;
    }

    .nav-links a:hover {
      color: var(--primary-orange);
      background-color: #fff7ed;
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      background: linear-gradient(135deg, var(--primary-orange), var(--secondary-orange));
      color: #ffffff !important;
      font-weight: 600;
      border-radius: 999px;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.25);
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 85, 0, 0.35);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: 6px;
      font-size: 1.2rem;
      cursor: pointer;
      color: var(--deep-charcoal);
    }

    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 80% 20%, #ffedd5 0%, rgba(255, 250, 245, 0.6) 60%), linear-gradient(180deg, #fffaf5 0%, #fff 100%);
      border-bottom: 1px solid var(--warm-border);
      position: relative;
    }

    .hero-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: #fff7ed;
      border: 1px solid var(--border-color);
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-orange);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.85rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--deep-charcoal);
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary-orange), #ea580c);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.18rem;
      color: var(--muted-text);
      max-width: 820px;
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
      justify-content: center;
      margin-bottom: 48px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--primary-orange), #ea580c);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: 8px;
      box-shadow: 0 6px 20px rgba(255, 85, 0, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #ea580c, var(--primary-orange));
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 85, 0, 0.4);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: var(--deep-charcoal);
      font-size: 1.05rem;
      font-weight: 600;
      padding: 14px 30px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      background: #fff7ed;
      color: var(--primary-orange);
      border-color: var(--primary-orange);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      max-width: 1000px;
      margin-top: 10px;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--warm-border);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-orange);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.92rem;
      color: var(--muted-text);
      font-weight: 500;
    }

    .model-ticker {
      background: #fff7ed;
      border-top: 1px solid var(--warm-border);
      border-bottom: 1px solid var(--warm-border);
      padding: 16px 0;
      overflow: hidden;
      white-space: nowrap;
    }

    .model-tag-list {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .model-tag {
      padding: 5px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--deep-charcoal);
    }

    .section-wrap {
      padding: 85px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.86rem;
      font-weight: 700;
      color: var(--primary-orange);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--deep-charcoal);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--muted-text);
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 30px 26px;
      border: 1px solid var(--warm-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

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

    .card-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: 10px;
      background: #fff7ed;
      color: var(--primary-orange);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--deep-charcoal);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.94rem;
      color: var(--muted-text);
      line-height: 1.6;
    }

    .visual-content-box {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--warm-border);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }

    .visual-content-box img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .visual-desc-inner {
      padding: 22px;
    }

    .visual-desc-inner h4 {
      font-size: 1.15rem;
      color: var(--deep-charcoal);
      margin-bottom: 8px;
    }

    .visual-desc-inner p {
      font-size: 0.92rem;
      color: var(--muted-text);
    }

    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 26px;
      border: 1px solid var(--warm-border);
      position: relative;
    }

    .step-num {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-orange), var(--secondary-orange));
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .step-item h4 {
      font-size: 1.15rem;
      color: var(--deep-charcoal);
      margin-bottom: 10px;
    }

    .step-item p {
      font-size: 0.92rem;
      color: var(--muted-text);
    }

    .table-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--warm-border);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 650px;
      text-align: left;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f5f5f4;
      font-size: 0.95rem;
    }

    .compare-table th {
      background-color: #fff7ed;
      color: var(--deep-charcoal);
      font-weight: 700;
    }

    .compare-table tr:hover td {
      background-color: #fffaf5;
    }

    .badge-star {
      color: #eab308;
      font-weight: 700;
    }

    .highlight-cell {
      color: var(--primary-orange);
      font-weight: 700;
    }

    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--warm-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 0.95rem;
      color: var(--deep-charcoal);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: normal;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #f5f5f4;
      padding-top: 14px;
    }

    .avatar-initial {
      width: 40px;
      height: 40px;
      background: #ffedd5;
      color: var(--primary-orange);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-info h5 {
      font-size: 0.95rem;
      color: var(--deep-charcoal);
      line-height: 1.2;
    }

    .author-info span {
      font-size: 0.82rem;
      color: var(--muted-text);
    }

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

    .faq-item {
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid var(--warm-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--deep-charcoal);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .faq-question:hover {
      color: var(--primary-orange);
      background-color: #fffaf5;
    }

    .faq-arrow {
      font-size: 0.9rem;
      color: var(--muted-text);
      transition: transform 0.2s ease;
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
      color: var(--primary-orange);
    }

    .faq-answer {
      padding: 0 22px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      background-color: #ffffff;
      font-size: 0.94rem;
      color: var(--muted-text);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 4px 22px 20px;
      max-height: 300px;
    }

    .form-wrapper {
      max-width: 680px;
      margin: 0 auto;
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--warm-border);
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--deep-charcoal);
      margin-bottom: 8px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d6d3d1;
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--body-text);
      outline: none;
      transition: var(--transition);
      background-color: #fafaf9;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-orange);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.12);
      background-color: #ffffff;
    }

    .form-textarea {
      resize: vertical;
      min-height: 120px;
    }

    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 24px;
    }

    .article-item-tag {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--deep-charcoal);
    }

    .article-item-tag:hover {
      border-color: var(--primary-orange);
      color: var(--primary-orange);
      background: #fff7ed;
    }

    .friend-links-bar {
      padding: 24px 0;
      background: #fafaf9;
      border-top: 1px solid #f5f5f4;
      font-size: 0.88rem;
    }

    .friend-links-container {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .friend-links-container a {
      color: var(--muted-text);
    }

    .friend-links-container a:hover {
      color: var(--primary-orange);
    }

    .site-footer {
      background: #1c1917;
      color: #d6d3d1;
      padding: 60px 0 30px;
      border-top: 3px solid var(--primary-orange);
      font-size: 0.92rem;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 18px;
    }

    .footer-links-col {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-col a {
      color: #a8a29e;
    }

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

    .footer-qr-block {
      display: flex;
      align-items: center;
      gap: 16px;
    }

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

    .footer-qr-img img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: contain;
    }

    .footer-bottom {
      border-top: 1px solid #292524;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #78716c;
    }

    .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: var(--primary-orange);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0,0,0,0.2);
      cursor: pointer;
      font-size: 1.2rem;
      border: none;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: #ea580c;
    }

    .float-qr-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 10px;
      border-radius: 8px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 140px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-pop span {
      font-size: 0.78rem;
      color: var(--deep-charcoal);
      font-weight: 600;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--warm-border);
        box-shadow: 0 8px 16px rgba(0,0,0,0.06);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        text-align: center;
        padding: 12px 0;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .form-wrapper {
        padding: 24px 16px;
      }
    }