:root {
      --primary-color: #ff5500;
      --primary-hover: #e04a00;
      --primary-light: #fff2eb;
      --accent-color: #ff8c42;
      --text-main: #1d2129;
      --text-muted: #5b626e;
      --text-light: #86909c;
      --bg-page: #fdfaf8;
      --bg-card: #ffffff;
      --bg-card-alt: #fff8f4;
      --border-color: #f2e3da;
      --border-focus: #ff7d3b;
      --shadow-sm: 0 2px 8px rgba(255, 85, 0, 0.05);
      --shadow-md: 0 8px 24px rgba(255, 85, 0, 0.08);
      --shadow-lg: 0 16px 36px rgba(224, 74, 0, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --max-width: 1240px;
      --font-sans: -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;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

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

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-color);
      letter-spacing: 0.5px;
    }

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

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #ff6b1a 0%, #ff3b00 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 75, 0, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #ff7e36 0%, #e63500 100%);
      box-shadow: 0 6px 18px rgba(255, 75, 0, 0.4);
      transform: translateY(-1px);
    }

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

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

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

    .mobile-menu-toggle svg {
      width: 28px;
      height: 28px;
      display: block;
    }

    /* 首屏 Hero 区：完全禁止出现任何图片资源 */
    .hero-section {
      padding: 60px 0 80px;
      background: radial-gradient(circle at 85% 15%, rgba(255, 115, 34, 0.12) 0%, rgba(255, 250, 248, 0) 65%),
                  radial-gradient(circle at 15% 80%, rgba(255, 85, 0, 0.08) 0%, rgba(255, 250, 248, 0) 50%),
                  linear-gradient(180deg, #ffffff 0%, #fff7f2 100%);
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

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

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid #ffd8c2;
      color: var(--primary-color);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
      box-shadow: var(--shadow-sm);
    }

    .badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-color);
      border-radius: 50%;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 85, 0, 0.6); }
      70% { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(255, 85, 0, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 85, 0, 0); }
    }

    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 900;
      color: #1a1a1a;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary-color);
    }

    .hero-desc {
      font-size: 17px;
      line-height: 1.7;
      color: var(--text-muted);
      margin-bottom: 28px;
      max-width: 620px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      margin-bottom: 36px;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px dashed #f5ccb5;
      padding-top: 24px;
    }

    .stat-item .stat-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.1;
    }

    .stat-item .stat-lab {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

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

    .card-terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #f8ebe3;
      padding-bottom: 12px;
      margin-bottom: 18px;
    }

    .terminal-dots {
      display: flex;
      gap: 6px;
    }

    .terminal-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #e5e6eb;
    }

    .terminal-dots span:nth-child(1) { background: #ff5f56; }
    .terminal-dots span:nth-child(2) { background: #ffbd2e; }
    .terminal-dots span:nth-child(3) { background: #27c93f; }

    .terminal-status {
      font-size: 12px;
      font-weight: 600;
      color: #00b42a;
      background: #e8ffea;
      padding: 3px 8px;
      border-radius: 4px;
    }

    .model-matrix-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }

    .model-chip {
      background: #fff6f0;
      border: 1px solid #ffd8c4;
      color: #bf360c;
      font-size: 12px;
      font-weight: 600;
      padding: 5px 10px;
      border-radius: 6px;
    }

    .code-console {
      background: #23272e;
      border-radius: var(--radius-sm);
      padding: 16px;
      color: #abb2bf;
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 12px;
      line-height: 1.6;
    }

    .code-console .hl-kw { color: #e06c75; font-weight: 700; }
    .code-console .hl-fn { color: #61afef; }
    .code-console .hl-str { color: #98c379; }
    .code-console .hl-num { color: #d19a66; }

    /* 通用区块排版 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #fff8f4;
    }

    .sec-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 46px;
    }

    .sec-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-color);
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 10px;
      letter-spacing: 0.5px;
    }

    .sec-title {
      font-size: 32px;
      font-weight: 800;
      color: #171a1d;
      margin-bottom: 12px;
    }

    .sec-subtitle {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 网格与卡片通用 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #ffb188;
    }

    .card-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1f2329;
    }

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

    /* 图文素材容器规范 */
    .media-card-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }

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

    .media-card-wrap:hover img {
      transform: scale(1.02);
    }

    .media-info {
      padding: 16px;
    }

    .media-info h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 对比评测高亮专区 */
    .rating-banner {
      background: linear-gradient(135deg, #ff5500 0%, #ff8533 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

    .rating-left h3 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .rating-left p {
      font-size: 14px;
      opacity: 0.92;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: rgba(255, 255, 255, 0.15);
      padding: 12px 24px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(4px);
    }

    .score-big {
      font-size: 42px;
      font-weight: 900;
      line-height: 1;
    }

    .score-meta {
      font-size: 13px;
      line-height: 1.4;
    }

    .stars-badge {
      color: #ffe817;
      font-size: 18px;
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

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

    .eval-table th,
    .eval-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid #f2e9e4;
    }

    .eval-table th {
      background: #fff2ea;
      color: #333333;
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background: #fffcfb;
    }

    .eval-table .highlight-col {
      background: #fff9f5;
      font-weight: 700;
      color: var(--primary-color);
    }

    /* 流程步骤 */
    .process-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      position: relative;
    }

    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: #ffd8c4;
      line-height: 1;
      margin-bottom: 10px;
    }

    .flow-step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .flow-step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-list {
      max-width: 860px;
      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;
      transition: border-color 0.2s;
    }

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

    .faq-question {
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question span.toggle-icon {
      font-size: 18px;
      color: var(--primary-color);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fffaf7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 20px 18px;
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: #383d44;
      line-height: 1.65;
      margin-bottom: 16px;
      position: relative;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #f0e3db;
      padding-top: 14px;
    }

    .user-avatar-char {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-meta h5 {
      font-size: 14px;
      font-weight: 700;
    }

    .user-meta p {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 表单与需求匹配区 */
    .form-wrap-box {
      max-width: 820px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d9d0cb;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-family: inherit;
      background: #faf8f7;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--border-focus);
      background: #ffffff;
    }

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

    /* 资讯与友情链接列表 */
    .articles-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .art-urls-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .art-badge-link {
      background: #fff5ee;
      border: 1px solid #fedbc5;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      color: #c84100;
      display: inline-block;
    }

    .art-badge-link:hover {
      background: #ffe3d1;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 12px;
    }

    .friend-links-flex a {
      font-size: 13px;
      color: var(--text-muted);
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 12px;
      border-radius: 4px;
    }

    .friend-links-flex a:hover {
      color: var(--primary-color);
      border-color: var(--primary-color);
    }

    /* 宣传图画廊 */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .banner-item-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
    }

    .banner-item-wrap .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #191c20;
      color: #b0b6be;
      padding: 50px 0 26px;
      border-top: 4px solid var(--primary-color);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      border-left: 3px solid var(--primary-color);
      padding-left: 8px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.8;
      color: #9ba1ab;
    }

    .footer-links-list li {
      margin-bottom: 8px;
    }

    .footer-links-list a {
      color: #9ba1ab;
      font-size: 13px;
    }

    .footer-links-list a:hover {
      color: #ff7d3b;
    }

    .qr-box {
      width: 110px;
      height: 110px;
      background: #ffffff;
      padding: 4px;
      border-radius: 6px;
      margin-top: 8px;
    }

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

    .footer-bottom-bar {
      border-top: 1px solid #292e35;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      color: #787f8b;
    }

    /* 浮动组件 */
    .floating-contact-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary-color);
      border: 1px solid #ffd1ba;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.25s ease;
      text-align: center;
      line-height: 1.1;
    }

    .float-btn:hover {
      background: var(--primary-color);
      color: #ffffff;
      transform: scale(1.08);
    }

    .back-top {
      display: none;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 12px;
      }
      .hero-title {
        font-size: 30px;
      }
      .grid-3, .grid-4, .banner-gallery-grid {
        grid-template-columns: 1fr;
      }
      .process-flow {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
    }