:root {
      --primary: #7026e6;
      --primary-dark: #5819bc;
      --primary-light: #f3eafd;
      --accent: #d946ef;
      --accent-glow: rgba(217, 70, 239, 0.15);
      --text-main: #1f2438;
      --text-sub: #545e75;
      --text-light: #8a94a6;
      --bg-body: #faf8ff;
      --bg-card: #ffffff;
      --border-color: #ede8f7;
      --shadow-sm: 0 4px 12px rgba(112, 38, 230, 0.05);
      --shadow-md: 0 10px 25px rgba(112, 38, 230, 0.08);
      --shadow-lg: 0 18px 40px rgba(112, 38, 230, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 10% 10%, rgba(217, 70, 239, 0.04) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(112, 38, 230, 0.05) 0%, transparent 50%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

    .brand-logo-wrap {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .brand-badge {
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 20px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 600;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff !important;
      padding: 9px 20px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(112, 38, 230, 0.25);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(112, 38, 230, 0.35);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background: #fdfcff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: var(--primary-light);
      padding: 5px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

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

    /* Hero 首屏 (无图片) */
    .hero-section {
      padding: 90px 0 80px 0;
      position: relative;
      overflow: hidden;
      background: radial-gradient(circle at 50% 20%, rgba(217, 70, 239, 0.12) 0%, rgba(112, 38, 230, 0.05) 45%, transparent 70%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-container {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-chip-pulse {
      width: 8px;
      height: 8px;
      background: #22c55e;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: #1a1636;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

    .hero-highlight {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 18px;
      color: var(--text-sub);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-action-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-main-action {
      background: linear-gradient(135deg, var(--primary) 0%, #9036f0 100%);
      color: #ffffff !important;
      padding: 14px 34px;
      border-radius: 30px;
      font-size: 16px;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(112, 38, 230, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(112, 38, 230, 0.4);
    }

    .btn-sub-action {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid #ddd2f3;
      padding: 14px 28px;
      border-radius: 30px;
      font-size: 15px;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .btn-sub-action:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      padding: 22px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .metric-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 平台矩阵与模型支持 */
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid #e3dcfa;
      padding: 7px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #3b315b;
      box-shadow: 0 2px 6px rgba(112, 38, 230, 0.04);
      transition: all 0.25s ease;
    }

    .model-badge:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #d1b8f7;
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary-light), #ebd5ff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-list {
      list-style: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      font-size: 13px;
      color: var(--text-sub);
    }

    .card-list li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .card-list li::before {
      content: "•";
      color: var(--accent);
      font-weight: bold;
    }

    /* 对比评测专属板块 */
    .rating-header-card {
      background: linear-gradient(135deg, #7026e6 0%, #a836ed 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      box-shadow: var(--shadow-md);
    }

    .rating-title-group h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .rating-title-group p {
      font-size: 15px;
      opacity: 0.9;
    }

    .rating-score-box {
      text-align: right;
      display: flex;
      align-items: baseline;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      padding: 14px 24px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(8px);
    }

    .score-number {
      font-size: 42px;
      font-weight: 900;
      line-height: 1;
      color: #ffd84d;
    }

    .score-total {
      font-size: 16px;
      opacity: 0.85;
    }

    .stars-badge {
      display: block;
      color: #ffd84d;
      font-size: 18px;
      margin-top: 4px;
      text-align: right;
    }

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

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

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background: #fbf9ff;
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table tr:hover {
      background: #fbf9ff;
    }

    .highlight-cell {
      background: rgba(112, 38, 230, 0.04);
      color: var(--primary-dark);
      font-weight: 600;
    }

    .badge-check {
      color: #16a34a;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .badge-cross {
      color: #9ca3af;
    }

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

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }

    .step-idx {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      font-size: 15px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-text {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 素材案例展示区 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-wrap {
      width: 100%;
      background: #f3f0f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-content {
      padding: 18px 20px;
    }

    .media-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 用户评论 */
    .testimonial-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;
    }

    .testimonial-stars {
      color: #f59e0b;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .testimonial-body {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

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

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

    /* FAQ 折叠手风琴 */
    .faq-list {
      max-width: 860px;
      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: border-color 0.25s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.75;
      border-top: 1px dashed var(--border-color);
      margin-top: -4px;
      padding-top: 16px;
    }

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

    /* 需求匹配与表单 */
    .form-wrapper-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 840px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-full {
      grid-column: span 2;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcd5ed;
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #faf8fd;
      color: var(--text-main);
      transition: border-color 0.25s ease, background 0.25s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(112, 38, 230, 0.1);
    }

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

    .btn-submit-form {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      padding: 14px 28px;
      border: none;
      border-radius: 30px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      width: 100%;
      box-shadow: 0 4px 16px rgba(112, 38, 230, 0.25);
      transition: all 0.25s ease;
    }

    .btn-submit-form:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(112, 38, 230, 0.35);
    }

    /* 资讯与友情链接 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .article-link-item {
      background: #ffffff;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-link-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 页脚 */
    .site-footer {
      background: #171329;
      color: #c9c3e2;
      padding: 60px 0 30px 0;
      border-top: 1px solid #2e264f;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.8;
      color: #a39cb8;
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      font-size: 13px;
    }

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

    .footer-links-list a {
      color: #a39cb8;
    }

    .footer-links-list a:hover {
      color: #ffffff;
    }

    .footer-qr-group {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .qr-card {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      width: 100px;
      text-align: center;
    }

    .qr-card-text {
      font-size: 11px;
      color: var(--text-main);
      margin-top: 4px;
      font-weight: 600;
    }

    .friend-links-bar {
      border-top: 1px solid #282142;
      padding: 20px 0;
      font-size: 13px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

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

    .friend-links-bar a {
      color: #a39cb8;
    }

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

    .footer-copyright {
      border-top: 1px solid #221c38;
      padding-top: 24px;
      font-size: 12px;
      text-align: center;
      color: #7b7393;
    }

    /* 悬浮工具栏 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .widget-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      position: relative;
      transition: all 0.25s ease;
    }

    .widget-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.05);
    }

    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .widget-btn:hover .qr-popup {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .site-header {
        height: 64px;
      }
      .header-inner {
        height: 64px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 14px;
      }
      .hero-section {
        padding: 60px 0 50px 0;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-intro {
        font-size: 15px;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .steps-wrapper {
        grid-template-columns: 1fr;
      }
      .rating-header-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding: 24px;
      }
      .form-wrapper-box {
        padding: 24px 16px;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }