:root {
      --primary-red: #d32f2f;
      --deep-red: #9a0007;
      --bright-red: #ff334b;
      --flame-red: #e52d27;
      --accent-gold: #ffb300;
      --accent-warm: #fff1f0;
      --text-main: #1f2329;
      --text-regular: #434a54;
      --text-muted: #6a737d;
      --bg-base: #fcf9f9;
      --bg-white: #ffffff;
      --border-color: #f3d4d4;
      --border-light: #fae6e6;
      --card-shadow: 0 10px 30px rgba(211, 47, 47, 0.08);
      --card-hover-shadow: 0 16px 40px rgba(211, 47, 47, 0.16);
      --transition-fast: 0.25s ease;
      --transition-normal: 0.35s ease;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

    * {
      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-base);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      position: relative;
      overflow-x: hidden;
    }

    /* 容器规范：全局统一居中容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 15px rgba(0, 0, 0, 0.04);
    }

    .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;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--deep-red);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      text-decoration: none;
      transition: color var(--transition-fast);
      position: relative;
    }

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

    .nav-links li a::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 14px;
      right: 14px;
      height: 2px;
      background: var(--flame-red);
      transform: scaleX(0);
      transition: transform var(--transition-fast);
    }

    .nav-links li a:hover::after {
      transform: scaleX(1);
    }

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

    .btn-header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, var(--flame-red), var(--deep-red));
      border-radius: 50px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(229, 45, 39, 0.3);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }

    .btn-header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(229, 45, 39, 0.45);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 3px;
      background: var(--text-main);
      margin: 4px 0;
      border-radius: 2px;
      transition: 0.3s;
    }

    /* 首屏 Hero 区域（严禁任何图片） */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, #ffe9e9 0%, #fff7f7 50%, #ffffff 100%);
      padding: 70px 0 60px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-light);
    }

    .hero-glow-1 {
      position: absolute;
      top: -100px;
      left: 10%;
      width: 380px;
      height: 380px;
      background: radial-gradient(circle, rgba(255, 75, 43, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
      filter: blur(40px);
    }

    .hero-glow-2 {
      position: absolute;
      bottom: -60px;
      right: 5%;
      width: 440px;
      height: 440px;
      background: radial-gradient(circle, rgba(229, 45, 39, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
      filter: blur(50px);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(229, 45, 39, 0.08);
      border: 1px solid rgba(229, 45, 39, 0.25);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--flame-red);
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.6rem;
      line-height: 1.25;
      font-weight: 900;
      color: #18191c;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight-red {
      color: var(--flame-red);
      background: linear-gradient(135deg, var(--flame-red), var(--deep-red));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-regular);
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #ff4136 0%, #c31432 100%);
      border-radius: 50px;
      text-decoration: none;
      box-shadow: 0 8px 24px rgba(229, 45, 39, 0.38);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
      border: none;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(229, 45, 39, 0.5);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--deep-red);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      text-decoration: none;
      transition: background var(--transition-fast), border-color var(--transition-fast);
    }

    .btn-hero-secondary:hover {
      background: var(--accent-warm);
      border-color: var(--flame-red);
    }

    .hero-meta-points {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      border-top: 1px dashed var(--border-color);
      padding-top: 20px;
    }

    .meta-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .meta-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--flame-red);
    }

    /* 右侧纯几何科技感面板（无图设计） */
    .hero-dashboard-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      position: relative;
    }

    .dash-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #f0f0f0;
      padding-bottom: 15px;
      margin-bottom: 20px;
    }

    .dash-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--deep-red);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-pill {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 12px;
      background: #e6f8ea;
      color: #1e7e34;
    }

    .dash-stat-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 15px;
      margin-bottom: 20px;
    }

    .stat-mini-box {
      background: var(--accent-warm);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 16px;
    }

    .stat-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .stat-val {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--flame-red);
    }

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

    .model-chip {
      font-size: 0.75rem;
      font-weight: 600;
      background: #f7f9fa;
      border: 1px solid #e1e4e8;
      border-radius: 6px;
      padding: 4px 9px;
      color: var(--text-regular);
    }

    .dash-footer-note {
      font-size: 0.85rem;
      color: var(--text-muted);
      background: #fffafa;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--flame-red);
    }

    /* 模块通用样式 */
    .section-spacing {
      padding: 80px 0;
      border-bottom: 1px solid #f2e9e9;
      position: relative;
    }

    .section-spacing:nth-child(even) {
      background: #ffffff;
    }

    .section-spacing:nth-child(odd) {
      background: var(--bg-base);
    }

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

    .section-badge {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--flame-red);
      background: var(--accent-warm);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 4px 14px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #1a1a1a;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 通用卡片与网格 */
    .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;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.03);
      transition: all var(--transition-normal);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--flame-red), var(--deep-red));
      opacity: 0;
      transition: opacity var(--transition-fast);
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(211, 47, 47, 0.4);
    }

    .service-card:hover::before {
      opacity: 1;
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--accent-warm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--flame-red);
      font-size: 1.4rem;
      font-weight: 900;
    }

    .service-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #1f2329;
      margin-bottom: 10px;
    }

    .service-card-desc {
      font-size: 0.92rem;
      color: var(--text-regular);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .service-card-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--deep-red);
      background: #fff5f5;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      width: fit-content;
    }

    /* 平台介绍深度模块 */
    .intro-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    .intro-feature-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .intro-feat-item {
      padding: 20px;
      background: #fffcfc;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
    }

    .intro-feat-item h4 {
      font-size: 1.1rem;
      color: var(--deep-red);
      margin-bottom: 8px;
    }

    .intro-feat-item p {
      font-size: 0.88rem;
      color: var(--text-regular);
      line-height: 1.5;
    }

    /* 步骤流程组件 */
    .step-grid {
      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-md);
      padding: 26px 20px;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 42px;
      height: 42px;
      line-height: 42px;
      background: linear-gradient(135deg, var(--flame-red), var(--deep-red));
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(229, 45, 39, 0.25);
    }

    .step-card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测精装表格 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      overflow-x: auto;
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: linear-gradient(90deg, #ffebee, #fff8f8);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 30px;
      margin-bottom: 24px;
    }

    .rating-left h3 {
      font-size: 1.35rem;
      color: var(--deep-red);
      margin-bottom: 6px;
    }

    .rating-left p {
      font-size: 0.9rem;
      color: var(--text-regular);
    }

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

    .rating-score {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--flame-red);
    }

    .rating-stars {
      color: var(--accent-gold);
      font-size: 1.4rem;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f0f0;
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #fbfbfb;
      color: #333;
      font-weight: 700;
    }

    .compare-table td:nth-child(2) {
      background: #fffafa;
      color: var(--deep-red);
      font-weight: 700;
      border-left: 1px solid #ffe8e8;
      border-right: 1px solid #ffe8e8;
    }

    .badge-win {
      display: inline-block;
      padding: 2px 8px;
      background: #e6f8ea;
      color: #1b5e20;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-left: 6px;
    }

    /* 案例展示画廊 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0,0,0,0.03);
      transition: transform var(--transition-fast);
    }

    .media-card:hover {
      transform: translateY(-4px);
    }

    .media-img-wrapper {
      position: relative;
      width: 100%;
      aspect-ratio: 16/9;
      background: #f0f0f0;
      overflow: hidden;
    }

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

    .media-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform var(--transition-normal);
    }

    .media-card:hover .media-img-wrapper img {
      transform: scale(1.04);
    }

    .media-body {
      padding: 20px;
    }

    .media-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .media-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 资讯中心与最新文章 */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-item a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      text-decoration: none;
      color: var(--text-main);
      transition: all var(--transition-fast);
    }

    .article-item a:hover {
      border-color: var(--flame-red);
      background: var(--accent-warm);
      transform: translateX(4px);
    }

    .article-meta {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 用户评论卡片 */
    .comment-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .comment-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .user-avatar-circle {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ffd3d3, #ff8a80);
      color: var(--deep-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

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

    .user-meta-role {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .comment-quote {
      font-size: 0.92rem;
      color: var(--text-regular);
      line-height: 1.6;
      font-style: italic;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color var(--transition-fast);
    }

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

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .faq-icon {
      font-size: 1.2rem;
      color: var(--flame-red);
      transition: transform 0.3s;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-regular);
      line-height: 1.7;
      border-top: 1px dashed var(--border-light);
      padding-top: 14px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 转化表单与联系我们 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

    .contact-item-row {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .contact-item-label {
      font-weight: 700;
      color: var(--text-main);
      min-width: 90px;
    }

    .contact-item-val {
      color: var(--text-regular);
      word-break: break-all;
    }

    .qr-container {
      margin-top: 24px;
      padding: 20px;
      background: var(--accent-warm);
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      display: block;
      margin: 0 auto 10px;
      background: #fff;
      padding: 6px;
      border-radius: 8px;
    }

    .qr-text {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--deep-red);
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcdfe6;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #ffffff;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--flame-red);
      box-shadow: 0 0 0 3px rgba(229, 45, 39, 0.15);
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, var(--flame-red), var(--deep-red));
      border: none;
      border-radius: 50px;
      cursor: pointer;
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
      box-shadow: 0 6px 20px rgba(229, 45, 39, 0.35);
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(229, 45, 39, 0.45);
    }

    /* 友情链接与页脚 */
    .friendly-links-section {
      padding: 30px 0;
      background: #fbf5f5;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }

    .friendly-links-container {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
    }

    .friendly-label {
      font-weight: 700;
      color: var(--deep-red);
      font-size: 0.92rem;
    }

    .friendly-links-container a {
      color: var(--text-regular);
      text-decoration: none;
      font-size: 0.9rem;
      padding: 4px 10px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      transition: all var(--transition-fast);
    }

    .friendly-links-container a:hover {
      color: var(--flame-red);
      border-color: var(--flame-red);
      background: var(--accent-warm);
    }

    .site-footer {
      background: #18191c;
      color: #a4a9b2;
      padding: 40px 0 30px;
      font-size: 0.9rem;
    }

    .footer-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      border-bottom: 1px solid #2d3036;
      padding-bottom: 24px;
      margin-bottom: 24px;
    }

    .footer-brand h4 {
      font-size: 1.2rem;
      color: #ffffff;
      margin-bottom: 6px;
    }

    .footer-brand p {
      font-size: 0.85rem;
      color: #8b929e;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
    }

    .footer-bottom a {
      color: #d1d5db;
      text-decoration: none;
    }

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

    /* 悬浮客服面板 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--flame-red), var(--deep-red));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 4px 18px rgba(229, 45, 39, 0.4);
      cursor: pointer;
      border: none;
      position: relative;
      transition: transform var(--transition-fast);
    }

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

    .float-btn svg {
      width: 26px;
      height: 26px;
      fill: currentColor;
    }

    .float-tooltip {
      position: absolute;
      right: 64px;
      background: #ffffff;
      color: var(--text-main);
      padding: 10px;
      border-radius: 8px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: none;
      width: 150px;
      text-align: center;
      pointer-events: none;
    }

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

    .float-tooltip p {
      font-size: 0.78rem;
      color: var(--deep-red);
      font-weight: 700;
    }

    .float-btn:hover .float-tooltip {
      display: block;
    }

    /* 响应式断点适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .intro-feature-list {
        grid-template-columns: 1fr;
      }
      .article-list {
        grid-template-columns: 1fr;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 16px 0;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        padding: 12px 20px;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .grid-4, .grid-2, .step-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .btn-hero-primary, .btn-hero-secondary {
        width: 100%;
      }
      .dash-stat-grid {
        grid-template-columns: 1fr;
      }
    }