:root {
      --bg-dark: #0a0713;
      --bg-card: rgba(22, 16, 38, 0.78);
      --bg-card-hover: rgba(33, 23, 58, 0.9);
      --border-color: rgba(255, 42, 133, 0.22);
      --border-glow: rgba(168, 85, 247, 0.5);
      --primary-pink: #ff2a85;
      --primary-purple: #9d4edd;
      --accent-cyan: #00f0ff;
      --text-main: #ffffff;
      --text-muted: #c4b5fd;
      --text-soft: #8d7da8;
      --neon-gradient: linear-gradient(135deg, #ff2a85 0%, #9d4edd 50%, #00f0ff 100%);
      --btn-gradient: linear-gradient(135deg, #ff2a85 0%, #7928ca 100%);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    body {
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(255, 42, 133, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 30%, rgba(157, 78, 221, 0.14) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
      background-attachment: fixed;
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 7, 19, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(255, 42, 133, 0.2);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      filter: drop-shadow(0 0 8px rgba(255, 42, 133, 0.6));
    }
    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: 1px;
      background: linear-gradient(90deg, #ffffff, #ff70a6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 规则：.nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: #e2d9f3;
      text-decoration: none;
      transition: all 0.25s ease;
      position: relative;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #ff2a85;
      text-shadow: 0 0 10px rgba(255, 42, 133, 0.8);
    }
    .header-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 6px;
      font-size: 0.92rem;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.3s ease;
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-glow {
      background: var(--btn-gradient);
      color: #ffffff;
      box-shadow: 0 0 16px rgba(255, 42, 133, 0.45);
    }
    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(255, 42, 133, 0.7);
      color: #ffffff;
    }
    .btn-outline {
      background: rgba(255, 42, 133, 0.08);
      border-color: rgba(255, 42, 133, 0.45);
      color: #fce7f3;
    }
    .btn-outline:hover {
      background: rgba(255, 42, 133, 0.2);
      border-color: var(--primary-pink);
      color: #ffffff;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid rgba(255, 42, 133, 0.4);
      color: #fff;
      padding: 6px 10px;
      border-radius: 4px;
      font-size: 1.1rem;
      cursor: pointer;
    }

    /* 统一 Section */
    section {
      padding: 72px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      font-weight: 700;
      background: rgba(255, 42, 133, 0.15);
      border: 1px solid rgba(255, 42, 133, 0.4);
      color: #ff6ea7;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 12px;
      color: #ffffff;
    }
    .section-title span {
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 Hero：严格要求不得出现图片 */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-inner {
      max-width: 920px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: rgba(157, 78, 221, 0.15);
      border: 1px solid rgba(157, 78, 221, 0.5);
      color: #e9d5ff;
      font-size: 0.88rem;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(157, 78, 221, 0.2);
    }
    .hero-badge .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #00f0ff;
      box-shadow: 0 0 8px #00f0ff;
    }
    .hero-title {
      font-size: clamp(2rem, 4.2vw, 3.1rem);
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title .gradient-text {
      background: linear-gradient(135deg, #ffffff 20%, #ff2a85 60%, #a855f7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
      font-weight: 400;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }
    .hero-actions .btn-portal {
      font-size: 1.05rem;
      padding: 13px 32px;
      background: linear-gradient(135deg, #ff0077, #7928ca);
      box-shadow: 0 0 25px rgba(255, 0, 119, 0.6);
      border-radius: 8px;
    }
    .hero-actions .btn-portal:hover {
      box-shadow: 0 0 35px rgba(255, 0, 119, 0.85);
      transform: translateY(-2px);
    }
    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }
    .hero-stat-card {
      background: rgba(26, 19, 44, 0.65);
      border: 1px solid rgba(255, 42, 133, 0.2);
      border-radius: 12px;
      padding: 20px 14px;
      text-align: center;
      transition: transform 0.3s, border-color 0.3s;
    }
    .hero-stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary-pink);
      box-shadow: 0 8px 20px rgba(255, 42, 133, 0.25);
    }
    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: #00f0ff;
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.85rem;
      color: #d8b4fe;
    }

    /* 模型矩阵胶囊条 */
    .models-ticker {
      margin-top: 36px;
      padding: 14px 20px;
      background: rgba(18, 12, 32, 0.7);
      border: 1px dashed rgba(168, 85, 247, 0.35);
      border-radius: 10px;
    }
    .models-label {
      font-size: 0.82rem;
      color: #f472b6;
      font-weight: 700;
      margin-bottom: 8px;
      letter-spacing: 0.8px;
    }
    .models-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }
    .model-chip {
      font-size: 0.78rem;
      padding: 3px 10px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: #f1f5f9;
    }

    /* 卡片网格通用 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px 24px;
      position: relative;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
    }
    .card-box:hover {
      background: var(--bg-card-hover);
      border-color: var(--primary-pink);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px rgba(255, 42, 133, 0.25);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(255, 42, 133, 0.2), rgba(157, 78, 221, 0.3));
      border: 1px solid rgba(255, 42, 133, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
      color: #00f0ff;
    }
    .card-box h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #ffffff;
    }
    .card-box p {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    /* 媒体图文展示区 */
    .media-showcase-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: center;
      margin-bottom: 40px;
    }
    .media-img-wrapper {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid rgba(255, 42, 133, 0.3);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }
    .media-img-wrapper img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-img-wrapper:hover img {
      transform: scale(1.03);
    }
    .media-meta-title {
      font-size: 1.45rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: #ffffff;
    }
    .banner-quad-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .banner-quad-grid .media-img-wrapper {
      aspect-ratio: 16/9;
    }

    /* 对比评测高光卡 */
    .review-score-hero {
      background: linear-gradient(135deg, rgba(35, 20, 60, 0.8), rgba(20, 14, 38, 0.9));
      border: 1px solid rgba(255, 42, 133, 0.45);
      border-radius: 16px;
      padding: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 32px;
      box-shadow: 0 0 30px rgba(255, 42, 133, 0.2);
    }
    .score-left {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .score-badge {
      font-size: 3.2rem;
      font-weight: 900;
      color: #ff2a85;
      text-shadow: 0 0 16px rgba(255, 42, 133, 0.8);
      line-height: 1;
    }
    .score-info h3 {
      font-size: 1.4rem;
      margin-bottom: 6px;
      color: #fff;
    }
    .stars {
      color: #ffb703;
      font-size: 1.2rem;
      margin-bottom: 4px;
      letter-spacing: 2px;
    }
    .table-container {
      overflow-x: auto;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      background: rgba(18, 12, 34, 0.7);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }
    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .compare-table th {
      background: rgba(36, 22, 60, 0.85);
      color: #f3e8ff;
      font-weight: 700;
    }
    .compare-table tr:hover {
      background: rgba(255, 42, 133, 0.05);
    }
    .compare-table .highlight-col {
      color: #00f0ff;
      font-weight: 700;
      background: rgba(255, 42, 133, 0.06);
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 18px;
      position: relative;
    }
    .step-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      line-height: 30px;
      text-align: center;
      border-radius: 50%;
      background: var(--primary-pink);
      color: #fff;
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 14px;
    }

    /* 需求匹配表单 */
    .form-wrap {
      max-width: 760px;
      margin: 0 auto;
      background: rgba(22, 15, 40, 0.85);
      border: 1px solid rgba(255, 42, 133, 0.4);
      border-radius: 16px;
      padding: 36px 32px;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #e2d9f3;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      background: rgba(11, 7, 21, 0.8);
      border: 1px solid rgba(168, 85, 247, 0.35);
      color: #ffffff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.25s;
    }
    .form-control:focus {
      border-color: var(--primary-pink);
      box-shadow: 0 0 10px rgba(255, 42, 133, 0.4);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    /* FAQ 手风琴 */
    .faq-grid {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 600;
      color: #fff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-question:hover {
      color: var(--primary-pink);
    }
    .faq-icon {
      font-size: 1.1rem;
      color: #a855f7;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary-pink);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: rgba(15, 10, 28, 0.6);
      color: var(--text-muted);
      font-size: 0.92rem;
      padding: 0 22px;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 16px 22px 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      color: #e2d9f3;
      font-size: 0.92rem;
      margin-bottom: 18px;
      line-height: 1.6;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff2a85, #9d4edd);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 1rem;
    }
    .reviewer-info h4 {
      font-size: 0.92rem;
      color: #ffffff;
    }
    .reviewer-info p {
      font-size: 0.8rem;
      color: #c084fc;
    }

    /* 文章外链与标签 */
    .articles-box {
      background: rgba(20, 14, 36, 0.7);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
    }
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .article-links a {
      color: #e0e7ff;
      text-decoration: none;
      background: rgba(255, 42, 133, 0.12);
      border: 1px solid rgba(255, 42, 133, 0.3);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      transition: all 0.25s;
    }
    .article-links a:hover {
      background: var(--primary-pink);
      color: #fff;
    }

    /* 页脚 */
    .site-footer {
      background: #06040d;
      border-top: 1px solid rgba(255, 42, 133, 0.25);
      padding: 56px 0 24px;
      color: var(--text-soft);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 24px;
      height: 2px;
      background: var(--primary-pink);
    }
    .footer-col p {
      margin-bottom: 8px;
      color: #bfaed8;
    }
    .footer-col a {
      color: #bfaed8;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: var(--primary-pink);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }
    .friend-links a {
      display: inline-block;
      padding: 3px 8px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 4px;
      color: #d1c4e9;
      font-size: 0.82rem;
    }
    .friend-links a:hover {
      background: rgba(255, 42, 133, 0.3);
      color: #fff;
    }
    .qr-box {
      text-align: center;
      display: inline-block;
      background: rgba(255, 255, 255, 0.04);
      padding: 12px;
      border-radius: 8px;
      border: 1px solid rgba(168, 85, 247, 0.25);
    }
    .qr-box img {
      width: 110px;
      height: 110px;
      display: block;
      margin: 0 auto 6px;
      border-radius: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 悬浮客服面板 */
    .float-service {
      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: linear-gradient(135deg, #ff2a85, #7928ca);
      border: none;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(255, 42, 133, 0.6);
      cursor: pointer;
      text-decoration: none;
      font-size: 1.1rem;
      transition: transform 0.25s;
    }
    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .cards-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid, .hero-highlights, .banner-quad-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0d0918;
        flex-direction: column;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .header-cta .btn {
        display: none;
      }
      .cards-grid, .reviews-grid, .media-showcase-row, .steps-grid, .hero-highlights, .banner-quad-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .score-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
    }