:root {
      --bg-base: #0f111a;
      --bg-surface: #181b26;
      --bg-card: #202434;
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #9d00ff;
      --neon-amber: #ffaa00;
      --text-main: #f0f4fc;
      --text-sub: #9da8c3;
      --text-muted: #65708a;
      --border-color: rgba(0, 240, 255, 0.18);
      --border-hover: rgba(255, 0, 127, 0.5);
      --glow-cyan: 0 0 16px rgba(0, 240, 255, 0.35);
      --glow-pink: 0 0 16px rgba(255, 0, 127, 0.35);
      --container-width: 1240px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(15, 17, 26, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }

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

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

    .brand-box img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .brand-title span {
      color: var(--neon-cyan);
    }

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

    .nav-links a {
      color: var(--text-sub);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.08);
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
      outline: none;
      white-space: nowrap;
    }

    .btn-neon {
      background: linear-gradient(135deg, #00f0ff 0%, #0077ff 100%);
      color: #050811;
      border-color: var(--neon-cyan);
      box-shadow: var(--glow-cyan);
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(0, 240, 255, 0.6);
      color: #000;
    }

    .btn-pink {
      background: linear-gradient(135deg, #ff007f 0%, #7900ff 100%);
      color: #fff;
      border-color: var(--neon-pink);
      box-shadow: var(--glow-pink);
    }

    .btn-pink:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(255, 0, 127, 0.6);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-main);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.5rem;
      cursor: pointer;
      padding: 6px;
    }

    /* 共通布局与标题 */
    section {
      padding: 80px 0;
      position: relative;
    }

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

    .badge-sub {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
      background: rgba(0, 240, 255, 0.06);
      color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }

    .section-title span {
      background: linear-gradient(120deg, #00f0ff, #ff007f);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    /* 首屏 Hero 无图片纯代码科技风 */
    .hero-section {
      padding: 100px 0 90px;
      background: radial-gradient(circle at 50% 30%, rgba(157, 0, 255, 0.15) 0%, rgba(0, 240, 255, 0.05) 40%, rgba(15, 17, 26, 0) 70%),
                  radial-gradient(circle at 85% 20%, rgba(255, 0, 127, 0.12) 0%, transparent 45%),
                  radial-gradient(circle at 15% 70%, rgba(0, 240, 255, 0.1) 0%, transparent 45%);
      position: relative;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

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

    .hero-content h1 {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #fff;
    }

    .hero-content h1 mark {
      background: transparent;
      color: var(--neon-cyan);
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
    }

    .hero-content p {
      font-size: 1.15rem;
      color: var(--text-sub);
      margin-bottom: 32px;
      max-width: 600px;
    }

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

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-tags span {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 4px 12px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: all 0.3s;
    }

    .hero-tags span:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

    /* 首屏右侧纯CSS代码科技面板 */
    .hero-visual-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), inset 0 0 20px rgba(0, 240, 255, 0.05);
      position: relative;
    }

    .code-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 12px;
      margin-bottom: 16px;
    }

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

    .code-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #ff5f56;
    }
    .code-dots span:nth-child(2) { background: #ffbd2e; }
    .code-dots span:nth-child(3) { background: #27c93f; }

    .code-title {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-family: monospace;
    }

    .matrix-display {
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 0.9rem;
      color: var(--neon-cyan);
      background: #0d0f17;
      padding: 16px;
      border-radius: 8px;
      margin-bottom: 20px;
      border-left: 3px solid var(--neon-pink);
    }

    .matrix-display .line-k { color: var(--neon-pink); }
    .matrix-display .line-v { color: #fff; }
    .matrix-display .line-s { color: #8ec07c; }

    .model-chips {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
    }

    .model-chip {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      padding: 8px;
      border-radius: 6px;
      text-align: center;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-sub);
    }

    .model-chip.active {
      border-color: var(--neon-cyan);
      color: #fff;
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    /* 指标统计栏 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
      margin-top: -45px;
      position: relative;
      z-index: 10;
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    }

    .metric-item {
      text-align: center;
      border-right: 1px solid rgba(255, 255, 255, 0.08);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 2.3rem;
      font-weight: 800;
      color: var(--neon-cyan);
      line-height: 1.1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    /* 卡片网格统一 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .card {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .card:hover {
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px rgba(255, 0, 127, 0.15);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 16px;
      color: var(--neon-cyan);
    }

    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #fff;
    }

    .card p {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 平台介绍模块 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-text-block h3 {
      font-size: 1.6rem;
      color: #fff;
      margin-bottom: 16px;
    }

    .intro-text-block p {
      color: var(--text-sub);
      margin-bottom: 20px;
      font-size: 1rem;
    }

    .intro-feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 24px;
    }

    .intro-feature-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .intro-feature-list li::before {
      content: "✦";
      color: var(--neon-pink);
    }

    .visual-media-box {
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--glow-cyan);
      background: var(--bg-card);
    }

    .visual-media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .visual-media-box:hover img {
      transform: scale(1.02);
    }

    /* 对比评测表格 */
    .compare-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: linear-gradient(90deg, rgba(0, 240, 255, 0.08) 0%, rgba(255, 0, 127, 0.08) 100%);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px 24px;
      border-radius: 12px;
      margin-bottom: 28px;
    }

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

    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--neon-pink);
      line-height: 1;
      text-shadow: var(--glow-pink);
    }

    .score-meta {
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    .score-stars {
      color: #ffaa00;
      font-size: 1.2rem;
      margin-bottom: 4px;
    }

    .table-wrapper {
      overflow-x: auto;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: rgba(255, 255, 255, 0.02);
      color: var(--text-muted);
      font-weight: 600;
    }

    .compare-table th.highlight,
    .compare-table td.highlight {
      background: rgba(0, 240, 255, 0.04);
      color: #fff;
      font-weight: 600;
      border-left: 1px solid rgba(0, 240, 255, 0.2);
      border-right: 1px solid rgba(0, 240, 255, 0.2);
    }

    .compare-table td.highlight {
      color: var(--neon-cyan);
    }

    .tag-yes {
      color: #00f0ff;
      font-weight: bold;
    }

    .tag-no {
      color: var(--text-muted);
    }

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

    .step-card {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }

    .step-idx {
      position: absolute;
      top: 14px;
      right: 16px;
      font-size: 1.8rem;
      font-weight: 900;
      color: rgba(255, 255, 255, 0.05);
      font-family: monospace;
    }

    .step-card h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }

    /* 案例展示区 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-surface);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      overflow: hidden;
      position: relative;
      background: #000;
    }

    .case-img-wrap img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-info {
      padding: 20px;
      flex: 1;
    }

    .case-info h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 8px;
    }

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-bottom: 12px;
    }

    .case-tags {
      display: flex;
      gap: 8px;
    }

    .case-tags span {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(0, 240, 255, 0.1);
      color: var(--neon-cyan);
    }

    /* Token 比价卡片 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 14px;
      padding: 30px;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .price-card.featured {
      border-color: var(--neon-pink);
      box-shadow: 0 0 30px rgba(255, 0, 127, 0.2);
    }

    .price-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--neon-pink);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .price-title {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .price-amount {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--neon-cyan);
      margin-bottom: 16px;
    }

    .price-amount small {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .price-features {
      list-style: none;
      margin-bottom: 24px;
      flex: 1;
    }

    .price-features li {
      font-size: 0.9rem;
      color: var(--text-sub);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .price-features li::before {
      content: "✔";
      color: var(--neon-cyan);
    }

    /* 客户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }

    .review-quote {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #000;
    }

    .reviewer-info h5 {
      font-size: 0.95rem;
      color: #fff;
    }

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

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item.open {
      border-color: var(--border-color);
      box-shadow: 0 4px 15px rgba(0, 240, 255, 0.1);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

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

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--neon-pink);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      margin-top: -6px;
      padding-top: 14px;
    }

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

    /* 需求表单与联系区块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
    }

    .form-box h3 {
      font-size: 1.5rem;
      color: #fff;
      margin-bottom: 12px;
    }

    .form-box p {
      font-size: 0.95rem;
      color: var(--text-sub);
      margin-bottom: 24px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-sub);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      background: #0d0f17;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 6px;
      padding: 12px 16px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

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

    .contact-details-box {
      border-left: 1px solid rgba(255, 255, 255, 0.08);
      padding-left: 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-item-row {
      margin-bottom: 20px;
    }

    .contact-item-row h5 {
      font-size: 0.9rem;
      color: var(--neon-cyan);
      margin-bottom: 4px;
      text-transform: uppercase;
    }

    .contact-item-row p {
      font-size: 1.05rem;
      color: #fff;
    }

    .qr-container {
      margin-top: 16px;
      display: inline-block;
      padding: 8px;
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
    }

    .qr-container img {
      width: 130px;
      height: 130px;
      display: block;
    }

    /* 文章列表 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-card {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      transition: all 0.3s;
    }

    .article-card:hover {
      border-color: var(--neon-cyan);
    }

    .article-card h4 {
      font-size: 1.1rem;
      margin-bottom: 10px;
    }

    .article-card h4 a {
      color: #fff;
      text-decoration: none;
      transition: color 0.2s;
    }

    .article-card h4 a:hover {
      color: var(--neon-cyan);
    }

    .article-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-bottom: 16px;
      flex: 1;
    }

    .article-link {
      font-size: 0.85rem;
      color: var(--neon-pink);
      text-decoration: none;
      font-weight: 600;
    }

    /* 友情链接与底部 */
    .links-section {
      background: #090b11;
      padding: 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .links-wrap {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.88rem;
    }

    .links-wrap span {
      color: var(--text-muted);
      font-weight: 600;
    }

    .links-wrap a {
      color: var(--text-sub);
      text-decoration: none;
      transition: color 0.2s;
    }

    .links-wrap a:hover {
      color: var(--neon-cyan);
    }

    footer.site-footer {
      background: #05060a;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 50px 0 30px;
      color: var(--text-muted);
    }

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

    .footer-brand p {
      margin-top: 12px;
      font-size: 0.9rem;
      color: var(--text-sub);
      max-width: 380px;
    }

    .footer-col h4 {
      font-size: 1rem;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
      font-size: 0.9rem;
    }

    .footer-col ul li a {
      color: var(--text-sub);
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-col ul li a:hover {
      color: var(--neon-cyan);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 浮动客服挂件 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.3s;
      position: relative;
    }

    .float-btn:hover {
      background: var(--neon-cyan);
      color: #000;
      box-shadow: var(--glow-cyan);
    }

    .float-qr-tip {
      display: none;
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #fff;
      padding: 8px;
      border-radius: 8px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.5);
      width: 130px;
    }

    .float-btn:hover .float-qr-tip {
      display: block;
    }

    .float-qr-tip img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .metrics-bar { grid-template-columns: repeat(2, 1fr); row-gap: 20px; margin-top: 20px; }
      .grid-3, .case-gallery-grid, .price-grid, .review-grid, .article-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-4, .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .intro-grid, .contact-wrapper { grid-template-columns: 1fr; }
      .contact-details-box { border-left: none; border-top: 1px solid rgba(255,255,255,0.08); padding-left: 0; padding-top: 30px; }
    }

    @media (max-width: 768px) {
      .mobile-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-actions .btn-neon { display: none; }
      .grid-3, .grid-4, .case-gallery-grid, .price-grid, .review-grid, .article-grid, .steps-grid { grid-template-columns: 1fr; }
      .metrics-bar { grid-template-columns: 1fr; }
      .metric-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); padding-bottom: 12px; }
      .metric-item:last-child { border-bottom: none; }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .hero-content h1 { font-size: 1.85rem; }
      .section-title { font-size: 1.6rem; }
    }