:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #ecfdf5;
      --primary-soft: #d1fae5;
      --accent: #0d9488;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --border-light: #f1f5f9;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --radius-sm: 8px;
      --radius-lg: 20px;
      --container-max: 1200px;
      --transition: all 0.25s 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", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

    .brand-title span {
      color: var(--primary);
      margin-left: 4px;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-muted);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
    }

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

    .nav-action {
      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-sm);
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      line-height: 1.4;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 14px rgba(16, 185, 129, 0.35);
      transform: translateY(-1px);
    }

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

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

    .btn-secondary {
      background-color: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-secondary:hover {
      background-color: var(--bg-main);
      border-color: var(--text-light);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 区域通用结构 */
    .section {
      padding: 80px 0;
      position: relative;
    }

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

    .section-mint {
      background-color: #f0fdf4;
      background-image: radial-gradient(#d1fae5 1px, transparent 1px);
      background-size: 24px 24px;
    }

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

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 14px;
      border: 1px solid var(--primary-soft);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero 纯科技感卡片设计（无图片） */
    .hero-section {
      padding: 70px 0 80px 0;
      background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 50%, #ecfdf5 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 999px;
      border: 1px solid var(--border-color);
      font-size: 0.875rem;
      color: var(--accent);
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-soft);
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
    }

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

    .btn-hero-main {
      padding: 14px 32px;
      font-size: 1.05rem;
      background-color: var(--primary);
      color: #ffffff;
      border-radius: var(--radius-sm);
      font-weight: 700;
      box-shadow: 0 8px 18px rgba(16, 185, 129, 0.3);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .btn-hero-main:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(16, 185, 129, 0.4);
    }

    .hero-perks {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
    }

    .perk-item {
      display: flex;
      flex-direction: column;
    }

    .perk-val {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary-dark);
    }

    .perk-lbl {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 2px;
    }

    /* 首屏纯CSS控制台卡片 (首屏不使用任何图片) */
    .hero-console-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .console-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 16px;
    }

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

    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #cbd5e1;
    }

    .console-dot:nth-child(1) { background: #fca5a5; }
    .console-dot:nth-child(2) { background: #fde047; }
    .console-dot:nth-child(3) { background: #86efac; }

    .console-status {
      font-size: 0.8rem;
      color: var(--primary-dark);
      background: var(--primary-light);
      padding: 2px 10px;
      border-radius: 999px;
      font-weight: 600;
    }

    .console-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 16px;
    }

    .console-chip {
      background: var(--bg-main);
      padding: 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }

    .console-chip-title {
      font-size: 0.8rem;
      color: var(--text-light);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .console-chip-val {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-top: 4px;
    }

    .console-feed {
      background: #f8fafc;
      border-radius: var(--radius-sm);
      padding: 12px;
      border: 1px solid var(--border-light);
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    /* 多模型生态徽章墙 */
    .model-wall {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 24px 0;
    }

    .model-wall-label {
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 600;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1100px;
      margin: 0 auto;
    }

    .model-badge {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
      transition: var(--transition);
    }

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

    /* 卡片网格体系 */
    .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: 30px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--primary-soft);
      transform: translateY(-3px);
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 1.3rem;
      font-weight: 700;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
    }

    .card-tag-item {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: 4px;
      color: var(--text-light);
    }

    /* 场景矩阵卡片 */
    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .scene-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }

    .scene-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }

    .scene-title-icon {
      color: var(--primary);
      font-size: 1.1rem;
    }

    .scene-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 流程图设计 */
    .process-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-soft);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

    /* 对比评测表格与卡片 */
    .eval-highlight-card {
      background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .eval-score-num {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1;
      color: #ffffff;
    }

    .eval-score-max {
      font-size: 1.25rem;
      opacity: 0.85;
    }

    .eval-stars {
      color: #fde047;
      font-size: 1.4rem;
      letter-spacing: 2px;
      margin-left: 10px;
    }

    .eval-summary-text {
      font-size: 1.1rem;
      max-width: 600px;
      line-height: 1.6;
      opacity: 0.95;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
    }

    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .custom-table tr:hover td {
      background: #fcfdfe;
    }

    .badge-win {
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
      font-size: 0.85rem;
      display: inline-block;
    }

    /* 图片与案例展示卡片 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .media-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--bg-main);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-box-square {
      aspect-ratio: 1 / 1;
    }

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

    .media-info {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .media-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .media-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 客户评价板块 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
      position: relative;
    }

    .review-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .reviewer-name {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      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-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      color: var(--text-light);
      transition: transform 0.25s ease;
    }

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

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

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid var(--border-light);
    }

    /* 表单与需求匹配 */
    .form-container-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .form-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

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

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

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

    /* 资讯与友情链接列表 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-item-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
    }

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

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links-box a {
      text-decoration: none;
      font-size: 0.9rem;
      color: var(--text-muted);
      background: #ffffff;
      padding: 6px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      transition: var(--transition);
    }

    .friend-links-box a:hover {
      color: var(--primary-dark);
      border-color: var(--primary);
      background: var(--primary-light);
    }

    /* 联系我们与客服二维码 */
    .contact-info-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .contact-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-list-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      background: var(--bg-main);
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .qr-image-wrap {
      width: 100px;
      height: 100px;
      background: #ffffff;
      padding: 4px;
      border-radius: 6px;
      border: 1px solid var(--border-light);
      flex-shrink: 0;
    }

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

    .qr-text {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

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

    /* 页脚设计 */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px 0;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
      margin-top: 30px;
    }

    .footer-links {
      display: flex;
      gap: 18px;
    }

    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
    }

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

    /* 悬浮客服挂件与回到顶部 */
    .float-tools {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 990;
      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);
      text-decoration: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .float-kefu-card {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 200px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: var(--shadow-lg);
      display: none;
      text-align: center;
    }

    .float-btn-kefu:hover .float-kefu-card {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-container { grid-template-columns: repeat(2, 1fr); }
      .hero-container { grid-template-columns: 1fr; }
      .media-card-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .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-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .grid-3, .grid-2, .media-card-grid {
        grid-template-columns: 1fr;
      }
      .process-container {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.9rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .article-links-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }