:root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --primary-light: #eef2ff;
      --holo-cyan: #06b6d4;
      --holo-purple: #8b5cf6;
      --holo-pink: #ec4899;
      --holo-gradient: linear-gradient(135deg, #ec4899 0%, #8b5cf6 50%, #06b6d4 100%);
      --holo-subtle: linear-gradient(135deg, rgba(236,72,153,0.08) 0%, rgba(139,92,246,0.08) 50%, rgba(6,182,212,0.08) 100%);
      --holo-border: linear-gradient(135deg, rgba(236,72,153,0.3) 0%, rgba(139,92,246,0.3) 50%, rgba(6,182,212,0.3) 100%);
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 40px rgba(139, 92, 246, 0.12);
      --shadow-holo: 0 10px 30px rgba(139, 92, 246, 0.18);
      --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, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(at 0% 0%, rgba(236, 72, 153, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(139, 92, 246, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(6, 182, 212, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
    }

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

    /* 统一主居中容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    /* 按照指令：.nav-links 的 gap 设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 13px;
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }

    .btn-holo {
      background: var(--holo-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
      border: none;
    }

    .btn-holo:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-outline:hover {
      border-color: var(--holo-purple);
      color: var(--holo-purple);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .btn-sm {
      padding: 7px 15px;
      font-size: 0.875rem;
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 1.0625rem;
      border-radius: var(--radius-lg);
    }

    /* 移动端菜单切换按钮 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }

    /* Section 通用规范 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid rgba(139, 92, 246, 0.2);
      border-radius: 999px;
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--holo-purple);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO 区域（严格无图片，仅使用 CSS/渐变/几何科技卡片） */
    .hero-section {
      padding: 75px 0 65px;
      position: relative;
      overflow: hidden;
    }

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

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(255, 255, 255, 0.95);
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: 999px;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--holo-purple);
      margin-bottom: 20px;
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.1);
    }

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

    @keyframes pulseDot {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.4); opacity: 0.6; }
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.22;
      color: var(--text-main);
      margin-bottom: 18px;
      letter-spacing: -1px;
    }

    .hero-title .holo-highlight {
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 30px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 35px;
    }

    .hero-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      padding-top: 20px;
      border-top: 1px solid rgba(226, 232, 240, 0.8);
    }

    .hero-hl-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .hero-hl-icon {
      width: 18px;
      height: 18px;
      color: var(--holo-cyan);
      flex-shrink: 0;
    }

    /* 首屏右侧纯 CSS 科技数据面板（无图片） */
    .hero-visual-card {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.8);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-holo);
      position: relative;
    }

    .hero-visual-card::before {
      content: "";
      position: absolute;
      inset: -2px;
      border-radius: calc(var(--radius-lg) + 2px);
      background: var(--holo-gradient);
      z-index: -1;
      opacity: 0.4;
    }

    .holo-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 15px;
      border-bottom: 1px solid var(--border-color);
    }

    .holo-card-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .holo-status-pill {
      font-size: 0.75rem;
      padding: 4px 10px;
      background: #ecfdf5;
      color: #059669;
      border: 1px solid #a7f3d0;
      border-radius: 999px;
      font-weight: 600;
    }

    .holo-grid-metrics {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-bottom: 20px;
    }

    .holo-metric-box {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px;
      transition: var(--transition);
    }

    .holo-metric-box:hover {
      border-color: var(--holo-purple);
      transform: translateY(-2px);
    }

    .metric-value {
      font-size: 1.5rem;
      font-weight: 800;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
      display: block;
    }

    .metric-label {
      font-size: 0.8125rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .holo-stream-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .holo-stream-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.8125rem;
    }

    .stream-tag {
      font-weight: 600;
      color: var(--primary);
    }

    .stream-cost {
      font-weight: 700;
      color: #059669;
    }

    /* 跑马灯模型聚合条 */
    .models-marquee-wrap {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 20px 0;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .marquee-label {
      text-align: center;
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 600;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .model-tags-flex {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .model-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: 999px;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }

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

    /* 卡片网格系统 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    /* 镭射质感卡片 */
    .holo-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .holo-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(139, 92, 246, 0.4);
    }

    .card-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: var(--holo-subtle);
      border: 1px solid rgba(139, 92, 246, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--holo-purple);
      margin-bottom: 20px;
      font-size: 1.5rem;
      flex-shrink: 0;
    }

    .holo-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .holo-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .card-badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }

    .card-badge {
      font-size: 0.75rem;
      padding: 3px 8px;
      background: var(--bg-alt);
      color: var(--text-muted);
      border-radius: 4px;
      font-weight: 500;
    }

    /* 关于我们与图文分栏 */
    .about-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-image-container {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .about-image-container img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .about-image-container:hover img {
      transform: scale(1.02);
    }

    .feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.9375rem;
      color: var(--text-muted);
    }

    .check-icon {
      width: 20px;
      height: 20px;
      color: #10b981;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 标准流程时间线 */
    .step-timeline {
      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-lg);
      padding: 26px 20px;
      position: relative;
      text-align: center;
      transition: var(--transition);
    }

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

    .step-num {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: var(--holo-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.125rem;
      box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    }

    .step-card h4 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测模块 */
    .rating-banner {
      background: #ffffff;
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      box-shadow: var(--shadow-holo);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .big-score {
      font-size: 3rem;
      font-weight: 900;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1;
    }

    .score-details {
      display: flex;
      flex-direction: column;
    }

    .stars-row {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .score-note {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 600;
    }

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

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

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.9375rem;
    }

    .compare-table th {
      background: var(--bg-alt);
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table .highlight-col {
      background: rgba(139, 92, 246, 0.04);
      color: var(--holo-purple);
      font-weight: 700;
    }

    /* 价格与 Token 比价表 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }

    .price-card.featured {
      border: 2px solid var(--holo-purple);
      box-shadow: var(--shadow-holo);
      transform: scale(1.02);
    }

    .featured-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--holo-gradient);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
    }

    .price-card h3 {
      font-size: 1.375rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .price-amount {
      font-size: 2.25rem;
      font-weight: 900;
      color: var(--text-main);
      margin: 15px 0 20px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .price-unit {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .price-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 28px;
      flex-grow: 1;
    }

    .price-features li {
      font-size: 0.875rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 案例展示区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-info {
      padding: 20px;
    }

    .case-cat {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--holo-purple);
      text-transform: uppercase;
      margin-bottom: 6px;
      display: block;
    }

    .case-info h4 {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .case-info p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 客户评价网格 (6条评论) */
    .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-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .review-card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(139, 92, 246, 0.3);
    }

    .review-quote {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--holo-subtle);
      border: 1px solid rgba(139, 92, 246, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--holo-purple);
      font-size: 1rem;
      flex-shrink: 0;
    }

    .author-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 0.75rem;
      color: var(--text-light);
    }

    /* 折叠 FAQ 模块 */
    .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;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--holo-purple);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }

    .faq-icon {
      width: 20px;
      height: 20px;
      transition: transform 0.3s ease;
      color: var(--holo-purple);
      flex-shrink: 0;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 22px 20px;
    }

    /* 需求匹配与联系我们表单 */
    .contact-split {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-holo);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.9375rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: var(--bg-main);
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--holo-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
    }

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

    .contact-info-panel {
      background: var(--bg-main);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 20px;
      border: 1px solid var(--border-color);
    }

    .qr-box {
      text-align: center;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      max-width: 190px;
      margin: 0 auto;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      display: block;
      margin: 0 auto 8px;
    }

    .qr-tip {
      font-size: 0.8125rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .contact-details-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.875rem;
    }

    .contact-details-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-muted);
    }

    .contact-details-list strong {
      color: var(--text-main);
    }

    /* 行业资讯与文章 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
    }

    .article-links-box h4 {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 10px;
    }

    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-list li a {
      display: block;
      font-size: 0.9375rem;
      color: var(--text-muted);
      padding: 8px 12px;
      background: var(--bg-main);
      border-radius: var(--radius-sm);
      transition: var(--transition);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-list li a:hover {
      color: var(--primary);
      background: var(--primary-light);
      padding-left: 16px;
    }

    /* 页脚设计 (强制深色文字保证对比度) */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      margin-top: 60px;
      color: var(--text-muted);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.875rem;
      line-height: 1.7;
      margin-bottom: 14px;
    }

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

    .footer-links li a {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding: 24px 0;
      margin-bottom: 20px;
    }

    .friend-links-title {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    .friend-links-flex a {
      font-size: 0.8125rem;
      color: var(--text-light);
      background: var(--bg-main);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.8125rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 浮动操作栏 */
    .floating-actions {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--holo-gradient);
      color: #ffffff;
      transform: translateY(-3px);
      box-shadow: var(--shadow-lg);
    }

    .float-qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .float-qr-popup span {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 600;
    }

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

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .step-timeline { grid-template-columns: repeat(2, 1fr); }
      .pricing-grid { grid-template-columns: repeat(1, 1fr); }
      .case-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .hero-grid { grid-template-columns: 1fr; }
      .about-split { grid-template-columns: 1fr; }
      .contact-split { grid-template-columns: 1fr; padding: 24px; }
      .grid-3, .grid-4, .grid-2, .news-grid, .case-grid, .reviews-grid, .step-timeline {
        grid-template-columns: 1fr;
      }
      .hero-title { font-size: 2rem; }
      .section-title { font-size: 1.625rem; }
      .rating-banner { flex-direction: column; text-align: center; }
      .rating-score-box { flex-direction: column; }
      
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 0;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 16px;
      }
      .footer-top-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }