:root {
      --primary-yellow: #FFCC00;
      --primary-hover: #E6B800;
      --accent-yellow: #FFF176;
      --bright-gold: #FFA000;
      --dark-text: #111827;
      --body-text: #374151;
      --muted-text: #6B7280;
      --page-bg: #FCFAF2;
      --card-bg: #FFFFFF;
      --border-color: #F1E5AC;
      --container-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --shadow-sm: 0 2px 8px rgba(220, 160, 0, 0.08);
      --shadow-md: 0 8px 24px rgba(200, 140, 0, 0.12);
      --shadow-lg: 0 16px 36px rgba(180, 120, 0, 0.16);
      --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--page-bg);
      color: var(--body-text);
      line-height: 1.65;
      overflow-x: hidden;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--primary-yellow);
      box-shadow: 0 2px 15px rgba(230, 180, 0, 0.15);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .brand-logo-wrap {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #FFFDF0;
      border: 1px solid var(--primary-yellow);
    }

    .brand-text {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }

    .brand-text span {
      color: var(--bright-gold);
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--dark-text);
      border-radius: var(--radius-sm);
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--dark-text);
      background-color: var(--primary-yellow);
    }

    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-nav-primary {
      background-color: var(--primary-yellow);
      color: var(--dark-text);
      font-weight: 700;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--dark-text);
      box-shadow: 2px 2px 0 var(--dark-text);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .btn-nav-primary:hover {
      transform: translate(-2px, -2px);
      box-shadow: 4px 4px 0 var(--dark-text);
      background-color: #FFD520;
    }

    .btn-nav-sub {
      background: #FFFFFF;
      color: var(--dark-text);
      font-weight: 600;
      padding: 9px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #D1D5DB;
    }

    .btn-nav-sub:hover {
      border-color: var(--primary-yellow);
      background-color: #FFFDE6;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--dark-text);
      border-radius: 6px;
      padding: 6px 10px;
      font-size: 1.25rem;
      font-weight: bold;
      cursor: pointer;
      color: var(--dark-text);
    }

    /* 首屏 Hero - 严格无图，纯CSS几何与发光科技质感 */
    .hero-section {
      padding: 64px 0 54px;
      background: linear-gradient(180deg, #FFFDE8 0%, #FCFAF2 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFF9C4;
      border: 1px solid #FBC02D;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 700;
      color: #795548;
      margin-bottom: 20px;
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: #E65100;
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 20px;
      max-width: 900px;
    }

    .hero-title .highlight {
      background: linear-gradient(120deg, var(--primary-yellow) 0%, #FFB300 100%);
      padding: 2px 10px;
      border-radius: 8px;
      color: #111827;
      display: inline-block;
      box-decoration-break: clone;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: #4B5563;
      max-width: 820px;
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-hero-main {
      background: #FFD000;
      color: #111827;
      font-size: 1.15rem;
      font-weight: 800;
      padding: 16px 36px;
      border-radius: var(--radius-md);
      border: 3px solid #111827;
      box-shadow: 4px 4px 0 #111827;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-main:hover {
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0 #111827;
      background: #FFE033;
    }

    .btn-hero-secondary {
      background: #FFFFFF;
      color: #111827;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 16px 30px;
      border-radius: var(--radius-md);
      border: 2px solid #E5E7EB;
      box-shadow: var(--shadow-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary-yellow);
      background: #FFFDE8;
      transform: translateY(-2px);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      width: 100%;
      max-width: 1060px;
    }

    .stat-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--primary-yellow);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #E2C044;
    }

    .stat-num {
      font-size: 1.95rem;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .stat-num span {
      color: var(--bright-gold);
      font-size: 1.4rem;
    }

    .stat-desc {
      font-size: 0.9rem;
      color: var(--muted-text);
      font-weight: 600;
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 72px 0;
      border-bottom: 1px solid #EFE8C8;
    }

    .section-wrap.alt-bg {
      background-color: #FDFCEF;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      background: #FFF3A8;
      color: #8C6200;
      font-weight: 800;
      font-size: 0.82rem;
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 14px;
      line-height: 1.3;
    }

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

    /* 卡片网格系统 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .base-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .base-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--bright-gold);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: #FFF8D1;
      border: 1px solid #FFDE59;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      color: #946200;
      font-weight: bold;
    }

    .card-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
      line-height: 1.35;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-footer-tags {
      margin-top: 18px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .mini-tag {
      background: #F4EFCF;
      color: #695200;
      font-size: 0.78rem;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 平台支持模型标签墙 */
    .model-tags-container {
      background: #FFFFFF;
      border: 2px dashed #E5CD6B;
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
      margin-top: 36px;
    }

    .model-tags-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .model-badges {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-badge-item {
      background: #FFFDF0;
      border: 1px solid #F0D980;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      color: #4B3B00;
      transition: var(--transition);
    }

    .model-badge-item:hover {
      background: var(--primary-yellow);
      color: #111827;
      transform: scale(1.05);
    }

    /* 案例展示区 */
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #E6B800;
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #F3F4F6;
      overflow: hidden;
    }

    .case-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .case-type {
      font-size: 0.8rem;
      color: var(--bright-gold);
      font-weight: 800;
      margin-bottom: 6px;
      text-transform: uppercase;
    }

    /* 对比评测专属样式 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #FFF7C2 0%, #FFE082 100%);
      border: 2px solid #DDA600;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: var(--shadow-md);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: #111827;
      line-height: 1;
    }

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

    .eval-stars {
      color: #D87A00;
      font-size: 1.4rem;
      letter-spacing: 2px;
      font-weight: 900;
    }

    .eval-verdict {
      font-size: 1.15rem;
      font-weight: 800;
      color: #111827;
    }

    .eval-meta {
      font-size: 0.9rem;
      color: #5D4037;
    }

    .eval-btn-go {
      background: #111827;
      color: #FFD000;
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 800;
      border-radius: var(--radius-md);
      white-space: nowrap;
      border: 2px solid #111827;
    }

    .eval-btn-go:hover {
      background: #2D3748;
      color: #FFFFFF;
    }

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

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #F1E5AC;
      font-size: 0.95rem;
    }

    .compare-table th {
      background-color: #FFFDE6;
      color: var(--dark-text);
      font-weight: 800;
    }

    .compare-table th.primary-col,
    .compare-table td.primary-col {
      background-color: #FFF9DB;
      font-weight: 700;
      color: #111827;
      border-left: 2px solid #F0C419;
      border-right: 2px solid #F0C419;
    }

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

    .check-yes {
      color: #2E7D32;
      font-weight: 800;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .check-no {
      color: #C62828;
      font-weight: 700;
    }

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

    .process-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .process-step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-yellow);
      color: var(--dark-text);
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      margin-bottom: 14px;
      border: 2px solid #111827;
    }

    /* 用户评论卡片 */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 46px;
      height: 46px;
      background: #FFE082;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #5D4037;
      font-size: 1.1rem;
      border: 2px solid #FFD54F;
    }

    .review-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark-text);
    }

    .review-info p {
      font-size: 0.8rem;
      color: var(--muted-text);
    }

    .review-content {
      font-size: 0.92rem;
      color: var(--body-text);
      line-height: 1.6;
      margin-bottom: 12px;
      font-style: italic;
    }

    .review-rating {
      color: #F59E0B;
      font-size: 0.9rem;
      font-weight: bold;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      align-items: stretch;
    }

    .form-container {
      background: #FFFFFF;
      border: 2px solid var(--primary-yellow);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1.5px solid #E5E7EB;
      border-radius: var(--radius-sm);
      background-color: #FAFAFA;
      color: var(--dark-text);
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: #FFB300;
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(255, 204, 0, 0.25);
    }

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

    .btn-submit {
      width: 100%;
      background: var(--primary-yellow);
      color: var(--dark-text);
      font-size: 1.1rem;
      font-weight: 800;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 2px solid #111827;
      box-shadow: 3px 3px 0 #111827;
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      background: #FFD520;
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0 #111827;
    }

    .contact-info-panel {
      background: #FFFDE8;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-list-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 18px;
      font-size: 0.95rem;
    }

    .contact-badge-icon {
      width: 36px;
      height: 36px;
      background: #FFECB3;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #6D4C41;
      flex-shrink: 0;
    }

    .qr-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px;
      text-align: center;
      display: inline-block;
      max-width: 180px;
      box-shadow: var(--shadow-sm);
    }

    .qr-card img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px;
      border-radius: 4px;
    }

    .qr-desc {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--dark-text);
    }

    /* FAQ 折叠组件 */
    .faq-accordion {
      max-width: 900px;
      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;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #F0C419;
    }

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

    .faq-icon {
      font-size: 1.3rem;
      font-weight: bold;
      color: var(--bright-gold);
      transition: transform 0.3s ease;
    }

    .faq-content {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.65;
      display: none;
      border-top: 1px dashed #F5EBBA;
      padding-top: 14px;
    }

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

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

    /* 资讯与百科文章 */
    .news-article-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .news-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      background: #FFFDF5;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary-yellow);
      transition: var(--transition);
    }

    .news-link-item:hover {
      background: #FFF9DB;
      transform: translateX(4px);
    }

    .news-link-item a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--dark-text);
    }

    /* 友链区与页脚 */
    .links-section {
      background: #FFFDE8;
      border-top: 1px solid var(--border-color);
      padding: 32px 0;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .friend-links-title {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--dark-text);
    }

    .friend-links-wrap a {
      font-size: 0.9rem;
      color: #4B5563;
      background: #FFFFFF;
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid #E5DCA8;
    }

    .friend-links-wrap a:hover {
      color: #111827;
      border-color: var(--primary-yellow);
      background-color: var(--primary-yellow);
    }

    .site-footer {
      background: #111827;
      color: #E5E7EB;
      padding: 40px 0 24px;
      border-top: 3px solid var(--primary-yellow);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 800;
      color: #FFD000;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 0.88rem;
      color: #9CA3AF;
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list a {
      font-size: 0.88rem;
      color: #D1D5DB;
    }

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

    .footer-bottom {
      border-top: 1px solid #374151;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #9CA3AF;
    }

    /* 悬浮客服面板 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary-yellow);
      color: #111827;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      border: 2px solid #111827;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: #FFE033;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.2rem; }
      .grid-4, .process-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta-group { display: none; }
      .mobile-menu-btn { display: block; }
      .nav-links.show-mobile {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        border-bottom: 2px solid var(--primary-yellow);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show-mobile li a { width: 100%; padding: 12px; }
      .hero-title { font-size: 1.8rem; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-2, .grid-3, .grid-4, .process-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .eval-highlight-box { flex-direction: column; text-align: center; }
      .eval-score-wrap { flex-direction: column; gap: 8px; }
    }