/* 基础重置与亮橙炽艳风变量定义 */
    :root {
      --primary: #FF5A00;
      --primary-hover: #E04E00;
      --primary-light: #FFF2EB;
      --primary-glow: rgba(255, 90, 0, 0.15);
      --secondary: #FF9000;
      --text-main: #1F2328;
      --text-muted: #59636E;
      --text-light: #8C959F;
      --bg-page: #FAF9F6;
      --bg-card: #FFFFFF;
      --bg-card-alt: #FFFBF7;
      --border: #F0E6DF;
      --border-focus: #FFB288;
      --shadow-sm: 0 2px 8px rgba(255, 90, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(255, 90, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 16px 36px rgba(255, 90, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --container-max: 1200px;
      --transition: all 0.28s ease;
    }

    * {
      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", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 统一容器体系 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 头部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      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-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-box img {
      max-height: 38px;
      width: auto;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

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

    .nav-cta {
      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: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 90, 0, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 90, 0, 0.4);
    }

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

    .btn-outline:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* 区域通用标题 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

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

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero 区域 (无图片) */
    .hero-section {
      padding: 70px 0 80px 0;
      background: radial-gradient(circle at 50% 10%, rgba(255, 144, 0, 0.12) 0%, rgba(250, 249, 246, 0) 70%);
      position: relative;
      border-bottom: 1px solid var(--border);
    }

    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .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: 1.15rem;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

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

    .hero-actions .btn-lg {
      padding: 14px 36px;
      font-size: 1.05rem;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding: 24px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .metric-item {
      text-align: center;
    }

    .metric-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 卡片网格通用 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

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

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 标签云与支持模型 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      padding: 8px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 对比评测表格 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #FFF6F0 0%, #FFFBF7 100%);
      border: 1px solid var(--border-focus);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .eval-stars {
      color: #FF9000;
      font-size: 1.4rem;
      margin-bottom: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }

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

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

    th {
      background-color: #FAF5F2;
      color: var(--text-main);
      font-weight: 700;
    }

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

    .td-highlight {
      background-color: var(--primary-light);
      font-weight: 600;
      color: var(--primary);
    }

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

    .timeline-step {
      background: #FFFFFF;
      border: 1px solid var(--border);
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .timeline-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 1rem;
    }

    /* 图片展示区 */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 32px;
    }

    .media-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .media-card-img-wrap {
      aspect-ratio: 16 / 9;
      background-color: #F0E6DF;
      overflow: hidden;
    }

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

    .media-card-body {
      padding: 20px;
    }

    /* 文章列表 */
    .article-links {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
    }

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

    /* 常见问题 FAQ 折叠面板 */
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.28s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.65;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }

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

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

    /* 需求表单 */
    .form-wrapper {
      max-width: 720px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background-color: var(--bg-page);
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

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

    /* 联系渠道信息 */
    .contact-info-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .contact-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .contact-item strong {
      display: block;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    /* 友情链接与页脚 */
    .friend-links-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 40px;
    }

    .friend-links-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .friend-links-list a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    .footer {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border);
      padding: 48px 0 32px 0;
    }

    .footer-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border);
    }

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

    .footer-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-top: 6px;
    }

    .footer-bottom {
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 悬浮客服面板 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-size: 1.2rem;
      position: relative;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    .float-qr-modal {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      display: none;
      width: 140px;
      text-align: center;
    }

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

    .float-qr-modal span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-4, .timeline, .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .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);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .grid-2, .grid-3, .grid-4, .timeline, .hero-metrics, .media-grid, .contact-info-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .form-wrapper {
        padding: 24px 16px;
      }
      .header-inner {
        height: 64px;
      }
    }