:root {
      --primary: #4361ee;
      --primary-rgb: 67, 97, 238;
      --secondary: #7209b7;
      --accent-pink: #f72585;
      --accent-cyan: #4cc9f0;
      --accent-green: #06d6a0;
      --accent-yellow: #ffb703;
      --bg-light: #fbfbfe;
      --text-dark: #1e2235;
      --text-muted: #5e657e;
      --surface-white: #ffffff;
      --border-subtle: #e8ecf4;
      --border-rainbow: linear-gradient(90deg, #f72585, #7209b7, #4361ee, #4cc9f0, #06d6a0, #ffb703);
      --shadow-sm: 0 4px 12px rgba(30, 34, 53, 0.05);
      --shadow-md: 0 10px 24px rgba(67, 97, 238, 0.08);
      --shadow-lg: 0 20px 40px rgba(67, 97, 238, 0.12);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
      --radius-sm: 8px;
      --radius-md: 14px;
      --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, "Noto Sans", sans-serif;
      background-color: var(--bg-light);
      background-image: 
        radial-gradient(at 0% 0%, rgba(247, 37, 133, 0.04) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(76, 201, 240, 0.05) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(114, 9, 183, 0.02) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(6, 214, 160, 0.04) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(255, 183, 3, 0.03) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-dark);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部彩虹光效线 */
    .rainbow-line {
      height: 4px;
      width: 100%;
      background: var(--border-rainbow);
      position: sticky;
      top: 0;
      z-index: 1001;
    }

    /* 导航系统 */
    .site-header {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      position: sticky;
      top: 4px;
      z-index: 1000;
      transition: var(--transition);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

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

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

    .brand-title-wrap {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    .brand-tag {
      font-size: 0.72rem;
      color: var(--primary);
      font-weight: 600;
      letter-spacing: 0.5px;
    }

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

    .nav-link {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.92rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
      white-space: nowrap;
    }

    .nav-link:hover, .ai-page-home-link:hover {
      color: var(--primary);
      background-color: rgba(67, 97, 238, 0.06);
    }

    .ai-page-home-link {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.92rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
      white-space: nowrap;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 99px;
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      line-height: 1;
    }

    .btn-rainbow-cta {
      background: linear-gradient(135deg, #f72585, #7209b7, #4361ee);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(114, 9, 183, 0.3);
    }

    .btn-rainbow-cta:hover {
      box-shadow: 0 6px 20px rgba(114, 9, 183, 0.45);
      transform: translateY(-2px);
    }

    .btn-outline {
      border-color: var(--border-subtle);
      background: var(--surface-white);
      color: var(--text-dark);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(67, 97, 238, 0.04);
    }

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

    /* 移动端菜单下拉 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 78px;
      left: 0;
      right: 0;
      background: #ffffff;
      padding: 16px 20px 24px;
      box-shadow: 0 15px 30px rgba(0,0,0,0.1);
      border-bottom: 1px solid var(--border-subtle);
      z-index: 999;
    }

    .mobile-menu.active {
      display: block;
    }

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

    .mobile-nav-list a {
      color: var(--text-dark);
      text-decoration: none;
      font-size: 1rem;
      font-weight: 500;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      display: block;
      background: #f8f9fe;
    }

    /* 通用区块排版 */
    .section {
      padding: 85px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 55px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      padding: 6px 16px;
      border-radius: 99px;
      background: linear-gradient(90deg, rgba(247, 37, 133, 0.1), rgba(67, 97, 238, 0.1));
      color: var(--secondary);
      margin-bottom: 14px;
      border: 1px solid rgba(114, 9, 183, 0.15);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
      line-height: 1.3;
    }

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

    /* 首屏 Hero（严禁展示任何图片） */
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
      overflow: hidden;
    }

    .hero-bg-shapes {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      pointer-events: none;
      z-index: 0;
    }

    .shape {
      position: absolute;
      filter: blur(70px);
      opacity: 0.35;
      border-radius: 50%;
    }

    .shape-1 {
      width: 400px;
      height: 400px;
      background: #4cc9f0;
      top: -100px;
      left: 10%;
    }

    .shape-2 {
      width: 450px;
      height: 450px;
      background: #f72585;
      bottom: -150px;
      right: 5%;
    }

    .shape-3 {
      width: 320px;
      height: 320px;
      background: #ffb703;
      top: 30%;
      left: 45%;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 18px;
      border-radius: 99px;
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 24px;
    }

    .badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--accent-green);
    }

    /* H1 字数严格控制在 20 字以内 */
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
      color: #1a1f36;
    }

    .hero-title-highlight {
      background: linear-gradient(135deg, #f72585 0%, #7209b7 50%, #4361ee 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 35px;
      line-height: 1.7;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #f72585 0%, #7209b7 40%, #4361ee 100%);
      border-radius: 99px;
      box-shadow: 0 8px 24px rgba(114, 9, 183, 0.35);
      border: none;
      text-decoration: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(114, 9, 183, 0.45);
    }

    .btn-hero-secondary {
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      background: #ffffff;
      border: 1px solid #d5dbec;
      border-radius: 99px;
      text-decoration: none;
      transition: var(--transition);
    }

    .btn-hero-secondary:hover {
      background: #f5f7fd;
      border-color: var(--primary);
      color: var(--primary);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      max-width: 960px;
      margin: 0 auto;
    }

    .metric-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(232, 236, 244, 0.8);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: rgba(67, 97, 238, 0.3);
      box-shadow: var(--shadow-md);
    }

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

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

    /* 平台支持的大模型矩阵标签云 */
    .models-stream {
      margin-top: 45px;
      padding: 20px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px dashed #dbe1f1;
    }

    .stream-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-pill {
      font-size: 0.78rem;
      padding: 5px 12px;
      border-radius: 6px;
      background: #f1f4fc;
      color: #3b4261;
      font-weight: 600;
      transition: var(--transition);
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 通用卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--surface-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--border-rainbow);
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(114, 9, 183, 0.2);
    }

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

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(247, 37, 133, 0.1));
      color: var(--primary);
      font-weight: 800;
      font-size: 1.2rem;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .feature-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 图文视觉区 (首屏之外展示) */
    .media-card {
      background: var(--surface-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-subtle);
      transition: var(--transition);
    }

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

    .media-thumb {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f0f3fa;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

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

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

    .media-info {
      padding: 22px;
    }

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

    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 对比评测表格与卡片 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(247, 37, 133, 0.04), rgba(67, 97, 238, 0.06));
      border: 1px solid #dce4fc;
      border-radius: var(--radius-lg);
      padding: 35px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-info {
      display: flex;
      align-items: center;
      gap: 25px;
    }

    .score-circle {
      width: 90px;
      height: 90px;
      border-radius: 50%;
      background: linear-gradient(135deg, #f72585, #7209b7);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(247, 37, 133, 0.3);
    }

    .score-val {
      font-size: 1.9rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-max {
      font-size: 0.72rem;
      opacity: 0.85;
    }

    .eval-recom-wrap h3 {
      font-size: 1.45rem;
      font-weight: 800;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .eval-stars {
      color: #ffb703;
      font-size: 1.25rem;
      margin-bottom: 6px;
    }

    .eval-summary-text {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .eval-table-wrap {
      overflow-x: auto;
      background: var(--surface-white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-subtle);
    }

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

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

    .eval-table th {
      background: #f8fafd;
      font-weight: 700;
      color: var(--text-dark);
    }

    .eval-table td.col-brand {
      font-weight: 700;
      color: var(--primary);
      background: rgba(67, 97, 238, 0.03);
    }

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

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

    .flow-step-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-subtle);
      position: relative;
    }

    .step-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(67, 97, 238, 0.15);
      position: absolute;
      top: 15px;
      right: 20px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .step-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 评价列表 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--surface-white);
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-body {
      font-size: 0.94rem;
      color: #3b4261;
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #edf1f8;
      padding-top: 16px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-name {
      font-size: 0.94rem;
      font-weight: 700;
      color: var(--text-dark);
    }

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

    /* 折叠面板 (FAQ) */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--surface-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: rgba(67, 97, 238, 0.4);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--text-dark);
      user-select: none;
    }

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

    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: 400;
      transition: transform 0.28s ease;
      color: var(--text-muted);
    }

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

    .faq-answer {
      padding: 0 24px 22px 24px;
      display: none;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* 需求表单与联系方式 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 40px;
      background: var(--surface-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-md);
      padding: 45px;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-dark);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d5dbec;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-dark);
      background: #fbfcfe;
      transition: var(--transition);
      outline: none;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
      background: #ffffff;
    }

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

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border-left: 1px solid var(--border-subtle);
      padding-left: 40px;
    }

    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 25px;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
    }

    .info-item strong {
      color: var(--text-dark);
      min-width: 80px;
    }

    .qr-card {
      background: #f8fafd;
      border: 1px solid #e2e7f3;
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .qr-img-box {
      width: 105px;
      height: 105px;
      border-radius: 8px;
      overflow: hidden;
      background: #ffffff;
      box-shadow: var(--shadow-sm);
      flex-shrink: 0;
    }

    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .qr-text-box h4 {
      font-size: 1.05rem;
      margin-bottom: 4px;
      color: var(--text-dark);
    }

    .qr-text-box p {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 行业资讯与文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-item {
      background: var(--surface-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .article-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(67, 97, 238, 0.3);
    }

    .article-meta {
      font-size: 0.8rem;
      color: var(--accent-pink);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 1.05rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 12px;
      color: var(--text-dark);
    }

    .article-link {
      font-size: 0.88rem;
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* 宣传图展示条 */
    .banner-strip-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .banner-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-subtle);
      background: #ffffff;
    }

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

    /* 友情链接与页脚 */
    .footer-section {
      background-color: #ffffff;
      border-top: 1px solid var(--border-subtle);
      padding: 50px 0 30px;
      color: var(--text-dark);
      margin-top: 50px;
    }

    .footer-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      padding-bottom: 30px;
      margin-bottom: 30px;
      border-bottom: 1px solid #edf1f8;
    }

    .footer-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-right: 8px;
    }

    .footer-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .footer-bottom-brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    /* 浮动客服 */
    .floating-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 998;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-dark);
      text-decoration: none;
      border: 1px solid var(--border-subtle);
      transition: var(--transition);
      cursor: pointer;
    }

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

    /* 响应式断点控制 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.3rem;
      }
      .grid-3, .testimonial-grid, .articles-grid, .banner-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .contact-info-panel {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--border-subtle);
        padding-top: 35px;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .header-actions .btn-outline {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-section {
        padding: 50px 0 40px;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .section {
        padding: 55px 0;
      }
      .grid-3, .grid-4, .grid-2, .flow-steps-grid, .testimonial-grid, .articles-grid, .banner-strip-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-info {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }