:root {
      --primary-orange: #ff5722;
      --vibrant-orange: #ff6a00;
      --deep-orange: #e64a19;
      --light-orange: #fff5f0;
      --accent-glow: rgba(255, 106, 0, 0.15);
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --bg-page: #fbfbfd;
      --bg-card: #ffffff;
      --bg-alt: #f4f6fa;
      --border-color: #e5e7eb;
      --border-focus: #ff7a45;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(255, 106, 0, 0.08);
      --shadow-lg: 0 16px 36px rgba(255, 106, 0, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    html {
      scroll-behavior: smooth;
    }

    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-page);
      color: var(--text-main);
      line-height: 1.68;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(229, 231, 235, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      max-width: 140px;
    }

    .brand-tagline {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-orange);
      padding: 3px 8px;
      background: var(--light-orange);
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 87, 34, 0.2);
    }

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

    .nav-item {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

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

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

    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: linear-gradient(135deg, var(--vibrant-orange), var(--deep-orange));
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(255, 87, 34, 0.25);
    }

    .btn-nav-portal:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(255, 87, 34, 0.35);
      color: #ffffff;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      color: var(--text-main);
      font-size: 18px;
    }

    /* 首屏 Hero (无图片，纯科技与亮橙炽艳质感) */
    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: radial-gradient(circle at 80% 10%, rgba(255, 106, 0, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(255, 87, 34, 0.06) 0%, transparent 50%),
                  #ffffff;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--light-orange);
      border: 1px solid rgba(255, 106, 0, 0.3);
      border-radius: 30px;
      color: var(--deep-orange);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: var(--vibrant-orange);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: #111827;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      max-width: 860px;
      font-size: 18px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 36px;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 15px 36px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #ff7a45, #ff5722 60%, #e64a19);
      border-radius: var(--radius-md);
      box-shadow: 0 8px 24px rgba(255, 87, 34, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.3);
      letter-spacing: 0.5px;
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(255, 87, 34, 0.45);
      color: #ffffff;
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 15px 30px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      background: var(--light-orange);
      color: var(--deep-orange);
      border-color: var(--border-focus);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      max-width: 1080px;
      margin-top: 10px;
    }

    .hero-stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 106, 0, 0.15);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

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

    .hero-stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--vibrant-orange);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .hero-stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用Section布局 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-alt);
    }

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

    .section-sub {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--deep-orange);
      text-transform: uppercase;
      letter-spacing: 1px;
      background: var(--light-orange);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 14px;
      line-height: 1.35;
    }

    .section-intro {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 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;
      align-items: center;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 87, 34, 0.4);
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background: var(--light-orange);
      color: var(--deep-orange);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .feature-name {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .feature-tag {
      font-size: 12px;
      background: #f3f4f6;
      color: #4b5563;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 平台矩阵标签条 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      transition: var(--transition);
    }

    .model-pill:hover {
      border-color: var(--vibrant-orange);
      color: var(--deep-orange);
      background: var(--light-orange);
    }

    /* 对比评测高光卡片 */
    .evaluation-container {
      background: #ffffff;
      border: 2px solid rgba(255, 106, 0, 0.2);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff7f2, #ffede6);
      border: 1px solid rgba(255, 106, 0, 0.25);
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 36px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-left h3 {
      font-size: 22px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 6px;
    }

    .score-left p {
      font-size: 14px;
      color: var(--text-muted);
    }

    .score-badge-group {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-number {
      font-size: 48px;
      font-weight: 900;
      color: var(--deep-orange);
      line-height: 1;
    }

    .score-max {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-light);
    }

    .score-stars {
      color: #ff9800;
      font-size: 24px;
      letter-spacing: 2px;
    }

    .eval-table-wrap {
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .eval-table th {
      background: #fafafa;
      padding: 16px;
      font-weight: 700;
      color: var(--text-main);
      border-bottom: 2px solid var(--border-color);
    }

    .eval-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-muted);
    }

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

    .eval-highlight {
      color: var(--deep-orange);
      font-weight: 700;
    }

    /* 流程与步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .flow-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .flow-step-num {
      width: 36px;
      height: 36px;
      line-height: 36px;
      background: var(--light-orange);
      color: var(--deep-orange);
      border-radius: 50%;
      margin: 0 auto 14px;
      font-weight: 800;
      font-size: 15px;
      border: 1px solid rgba(255, 87, 34, 0.3);
    }

    .flow-step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .flow-step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 媒体图库展示 */
    .media-card-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }

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

    .media-card-img-wrap:hover img {
      transform: scale(1.02);
    }

    .media-caption {
      padding: 16px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      text-align: center;
      background: #ffffff;
    }

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 920px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-item:hover {
      border-color: var(--border-focus);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

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

    .faq-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--vibrant-orange);
      transition: var(--transition);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafbfc;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      border-top-color: var(--border-color);
      padding: 18px 24px;
      max-height: 300px;
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 客户评价网格 */
    .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-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #ff9800;
      font-size: 16px;
      margin-bottom: 14px;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3f4f6;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--light-orange);
      color: var(--deep-orange);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

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

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #ffffff;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .btn-submit-form {
      width: 100%;
      padding: 15px;
      background: linear-gradient(135deg, var(--vibrant-orange), var(--deep-orange));
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(255, 87, 34, 0.3);
      transition: var(--transition);
    }

    .btn-submit-form:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 87, 34, 0.4);
    }

    /* 文章与资讯列表 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .article-card-link {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
      display: block;
    }

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

    .article-card-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .article-card-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 友情链接与版权页脚 */
    .site-footer {
      background: #181b20;
      color: #9ca3af;
      padding: 60px 0 30px;
      border-top: 4px solid var(--vibrant-orange);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-title {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-title::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 24px;
      height: 2px;
      background: var(--vibrant-orange);
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a {
      color: #9ca3af;
      font-size: 14px;
    }

    .footer-links-list a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .footer-contact-item {
      font-size: 14px;
      margin-bottom: 10px;
      color: #d1d5db;
    }

    .footer-qr-wrap {
      display: inline-block;
      padding: 8px;
      background: #ffffff;
      border-radius: var(--radius-sm);
      margin-top: 10px;
      max-width: 120px;
    }

    .footer-qr-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    .friend-links-bar {
      border-top: 1px solid #2d333b;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }

    .friend-links-label {
      color: #ffffff;
      font-weight: 600;
    }

    .friend-links-bar a {
      color: #9ca3af;
      transition: var(--transition);
    }

    .friend-links-bar a:hover {
      color: var(--vibrant-orange);
    }

    .footer-bottom {
      border-top: 1px solid #2d333b;
      padding-top: 24px;
      margin-top: 30px;
      text-align: center;
      font-size: 13px;
      color: #6b7280;
    }

    /* 浮动操作栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 18px;
      font-weight: bold;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--vibrant-orange);
      color: #ffffff;
      border-color: var(--vibrant-orange);
      transform: translateY(-3px);
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.3); opacity: 0.6; }
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-4, .hero-stats-grid, .reviews-grid, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .article-links-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 32px;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-item {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 26px;
      }
      .grid-4, .grid-3, .hero-stats-grid, .reviews-grid, .flow-steps, .article-links-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-group-row {
        grid-template-columns: 1fr;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }