:root {
      --primary: #ea580c;
      --primary-hover: #c2410c;
      --primary-light: #fff7ed;
      --primary-glow: rgba(234, 88, 12, 0.15);
      --accent: #f97316;
      --accent-warm: #fb923c;
      --dark-text: #0f172a;
      --mid-text: #334155;
      --light-text: #64748b;
      --bg-main: #fafaf9;
      --bg-card: #ffffff;
      --border-color: #f1f5f9;
      --border-accent: #fed7aa;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(234, 88, 12, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 20px 35px -10px rgba(234, 88, 12, 0.14);
      --radius: 12px;
      --radius-sm: 8px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--dark-text);
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(254, 215, 170, 0.18) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(253, 186, 116, 0.12) 0%, transparent 50%),
                  var(--bg-main);
      color: var(--dark-text);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(234, 88, 12, 0.1);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    }

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

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

    .logo-img-wrapper {
      display: flex;
      align-items: center;
      max-height: 42px;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--mid-text);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(234, 88, 12, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(234, 88, 12, 0.45);
    }

    .btn-outline {
      border-color: var(--border-accent);
      background: #ffffff;
      color: var(--primary);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark-text);
      cursor: pointer;
      padding: 6px;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
    }

    .hero-card-box {
      background: linear-gradient(180deg, #ffffff 0%, #fffbf7 100%);
      border: 1px solid var(--border-accent);
      border-radius: 20px;
      padding: 50px 40px;
      box-shadow: var(--shadow-md);
      position: relative;
      overflow: hidden;
    }

    .hero-glow-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      border: 1px solid var(--border-accent);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .hero-glow-tag::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark-text);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight-txt {
      color: var(--primary);
      background: linear-gradient(120deg, var(--primary) 0%, #f97316 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline;
    }

    .hero-desc {
      font-size: 1.12rem;
      color: var(--mid-text);
      max-width: 860px;
      margin-bottom: 36px;
      line-height: 1.75;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .btn-hero-large {
      padding: 14px 34px;
      font-size: 1.05rem;
      border-radius: 10px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      border-top: 1px solid var(--border-accent);
      padding-top: 30px;
    }

    .stat-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border-left: 4px solid var(--primary);
      transition: transform 0.25s ease;
    }

    .stat-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }

    .stat-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      display: block;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--light-text);
      font-weight: 500;
    }

    /* 通用Section */
    .section-wrap {
      padding: 60px 0;
    }

    .section-head {
      text-align: center;
      margin-bottom: 44px;
    }

    .section-tag {
      display: inline-block;
      color: var(--primary);
      background: var(--primary-light);
      border: 1px solid var(--border-accent);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--light-text);
      max-width: 720px;
      margin: 0 auto;
    }

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

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

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

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .card-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      margin-bottom: 16px;
      border: 1px solid var(--border-accent);
    }

    .card-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

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

    /* 对比评测 */
    .eval-box {
      background: #ffffff;
      border: 1px solid var(--border-accent);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
      margin-bottom: 24px;
    }

    .eval-header-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 28px;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #fff7ed;
      border: 1px solid var(--border-accent);
      padding: 10px 20px;
      border-radius: 50px;
    }

    .score-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.94rem;
    }

    .comp-table th, .comp-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }

    .comp-table th {
      background: #f8fafc;
      color: var(--dark-text);
      font-weight: 700;
    }

    .comp-table tr:hover td {
      background: #fffaf5;
    }

    .highlight-col {
      color: var(--primary);
      font-weight: 700;
      background: #fffdfa;
    }

    /* 标签云与模型矩阵 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.9rem;
      color: var(--mid-text);
      font-weight: 500;
      transition: all 0.2s;
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 流程步骤 */
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
      border-top: 4px solid var(--primary);
    }

    .step-num {
      position: absolute;
      top: 16px;
      right: 18px;
      font-size: 1.5rem;
      font-weight: 900;
      color: rgba(234, 88, 12, 0.2);
    }

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

    .media-img-holder {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-holder img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-content {
      padding: 20px;
    }

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

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
    }

    .avatar-fake {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-accent);
    }

    .user-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--dark-text);
    }

    .user-role {
      font-size: 0.82rem;
      color: var(--light-text);
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.2s;
    }

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

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

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

    .faq-icon {
      font-size: 1.1rem;
      color: var(--primary);
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafaf9;
      color: var(--mid-text);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* 表单区 */
    .form-panel {
      background: #ffffff;
      border: 1px solid var(--border-accent);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--dark-text);
      outline: none;
      background: #ffffff;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.15);
    }

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

    /* 文章链接列表 */
    .article-link-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-item-anchor {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--dark-text);
      font-size: 0.94rem;
      transition: all 0.2s;
    }

    .article-item-anchor:hover {
      border-color: var(--border-accent);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-accent);
      padding: 50px 0 30px;
      color: var(--mid-text);
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: var(--light-text);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }

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

    .qr-box-inner {
      display: inline-block;
      padding: 8px;
      background: #ffffff;
      border: 1px solid var(--border-accent);
      border-radius: var(--radius-sm);
      max-width: 120px;
    }

    .qr-box-inner img {
      width: 100%;
      height: auto;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.88rem;
      color: var(--light-text);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links-wrap a {
      color: var(--mid-text);
      text-decoration: none;
      font-size: 0.88rem;
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
    }

    /* 浮动客服 */
    .floating-support {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      border: none;
      box-shadow: 0 6px 18px rgba(234, 88, 12, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      text-decoration: none;
      transition: all 0.25s;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-hover);
    }

    /* 响应式 */
    @media (max-width: 992px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-card-box {
        padding: 30px 20px;
      }
      .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
        border-bottom: 1px solid var(--border-accent);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 12px;
      }
      .nav-btn-group {
        display: none;
      }
    }