:root {
      --primary: #5c3bf5;
      --primary-gradient: linear-gradient(135deg, #ff4e50 0%, #f9d423 50%, #5c3bf5 100%);
      --accent-coral: #ff5e62;
      --accent-blue: #00c6ff;
      --accent-purple: #7b2cbf;
      --accent-amber: #f7971e;
      --bg-page: #faf9ff;
      --bg-card: #ffffff;
      --text-main: #1f2438;
      --text-muted: #5e657c;
      --text-light: #8e95ab;
      --border-color: #ede9fe;
      --shadow-sm: 0 4px 12px rgba(92, 59, 245, 0.06);
      --shadow-md: 0 10px 30px rgba(92, 59, 245, 0.1);
      --shadow-lg: 0 20px 45px rgba(92, 59, 245, 0.15);
      --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, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      position: relative;
      overflow-x: hidden;
    }

    /* 绚丽彩调背景氛围 */
    body::before {
      content: "";
      position: fixed;
      top: -15vw;
      left: -10vw;
      width: 50vw;
      height: 50vw;
      background: radial-gradient(circle, rgba(255, 94, 98, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
      z-index: -2;
      pointer-events: none;
    }

    body::after {
      content: "";
      position: fixed;
      bottom: -15vw;
      right: -10vw;
      width: 60vw;
      height: 60vw;
      background: radial-gradient(circle, rgba(92, 59, 245, 0.1) 0%, rgba(0, 198, 255, 0.08) 50%, rgba(255, 255, 255, 0) 70%);
      z-index: -2;
      pointer-events: none;
    }

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

    /* 顶部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(92, 59, 245, 0.1);
      transition: all 0.3s ease;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

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

    .brand-logo img {
      max-height: 42px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      background: linear-gradient(135deg, #ff5e62, #5c3bf5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: 0.5px;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: 6px;
      transition: color 0.25s, background-color 0.25s;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: rgba(92, 59, 245, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 30px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: transform 0.25s, box-shadow 0.25s, background 0.25s, color 0.25s;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-gradient {
      background: linear-gradient(135deg, #ff5e62 0%, #7b2cbf 50%, #5c3bf5 100%);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(123, 44, 191, 0.3);
    }

    .btn-gradient:hover {
      box-shadow: 0 8px 24px rgba(123, 44, 191, 0.45);
      transform: translateY(-2px);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border-color: #d8d0fa;
    }

    .btn-outline:hover {
      background: rgba(92, 59, 245, 0.05);
      border-color: var(--primary);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2.5px;
      background: var(--text-main);
      margin: 5px 0;
      border-radius: 2px;
      transition: 0.3s;
    }

    /* Section 基础规范 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

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

    .badge-tag {
      display: inline-block;
      padding: 5px 14px;
      border-radius: 20px;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(135deg, rgba(255, 94, 98, 0.12), rgba(92, 59, 245, 0.12));
      color: var(--primary);
      margin-bottom: 14px;
      border: 1px solid rgba(92, 59, 245, 0.15);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.35;
    }

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

    /* 首屏 Hero - 纯彩调无图设计 */
    .hero-section {
      padding: 80px 0 70px;
      text-align: center;
      position: relative;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      margin: 16px auto 20px;
      max-width: 900px;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .hero-title .rainbow-text {
      background: linear-gradient(135deg, #ff5e62 10%, #f7971e 40%, #7b2cbf 70%, #5c3bf5 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
    }

    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 40px;
      background: linear-gradient(135deg, #ff5e62 0%, #f7971e 40%, #5c3bf5 100%);
      color: #fff;
      box-shadow: 0 10px 25px rgba(255, 94, 98, 0.35);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.3s ease;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 32px rgba(92, 59, 245, 0.45);
      color: #fff;
    }

    .btn-hero-sub {
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 40px;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid #dfd8fa;
      box-shadow: var(--shadow-sm);
      text-decoration: none;
      transition: all 0.3s;
    }

    .btn-hero-sub:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    .hero-data-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .data-pill {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(92, 59, 245, 0.12);
      padding: 22px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .data-pill:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(92, 59, 245, 0.3);
    }

    .data-pill .num {
      font-size: 2rem;
      font-weight: 800;
      background: linear-gradient(135deg, #ff5e62, #5c3bf5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }

    .data-pill .label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台矩阵与模型支持 */
    .model-tags-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      margin-top: 30px;
    }

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

    .tag-item {
      padding: 8px 16px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 30px;
      background: #f4f2ff;
      border: 1px solid #e4dcfc;
      transition: all 0.25s;
    }

    .tag-item:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 通用卡片栅格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .card-colorful {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      position: relative;
      overflow: hidden;
    }

    .card-colorful::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary-gradient);
      opacity: 0.85;
    }

    .card-colorful:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(92, 59, 245, 0.3);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      color: #fff;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #ff5e62, #7b2cbf);
    }

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

    .card-desc {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 案例中心图文卡片 */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }

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

    .case-media-box {
      width: 100%;
      overflow: hidden;
      background: #eee;
    }

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

    .case-card:hover .case-media-box img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 22px;
    }

    .case-meta {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* 对比评测表格与卡片 */
    .eval-highlight-card {
      background: linear-gradient(135deg, rgba(255, 94, 98, 0.08) 0%, rgba(92, 59, 245, 0.08) 100%);
      border: 2px solid #ded4fc;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

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

    .score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-stars {
      color: #ff9800;
      font-size: 1.4rem;
      margin-bottom: 4px;
    }

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

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

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

    .styled-table th {
      background: #f7f5ff;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.95rem;
    }

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

    .styled-table tr:hover td {
      background-color: #faf9ff;
    }

    .tag-check {
      color: #10b981;
      font-weight: 700;
    }

    /* 流程步骤 */
    .step-box {
      position: relative;
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      position: absolute;
      top: -12px;
      left: 20px;
      background: linear-gradient(135deg, #ff5e62, #5c3bf5);
      color: #fff;
      font-size: 0.85rem;
      font-weight: 800;
      padding: 3px 12px;
      border-radius: 20px;
    }

    /* 用户评论 */
    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 18px;
      line-height: 1.65;
      font-style: italic;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0ecfa;
      padding-top: 14px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff5e62, #00c6ff);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.25s;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: color 0.25s;
    }

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

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #faf9ff;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
    }

    .faq-answer p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      max-width: 820px;
      margin: 0 auto;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 20px;
    }

    .form-label {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcd5f5;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      background: #fdfcff;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.25s, box-shadow 0.25s;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(92, 59, 245, 0.15);
    }

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

    /* 资讯列表 */
    .news-list-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .news-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 14px;
      margin-top: 16px;
    }

    .news-link-btn {
      display: block;
      padding: 12px 16px;
      background: #f7f5ff;
      border: 1px solid #e7dffd;
      border-radius: var(--radius-sm);
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      transition: all 0.25s;
      text-align: center;
    }

    .news-link-btn:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 友情链接与页脚 */
    .footer {
      background: #191c2b;
      color: #e2e4ed;
      padding: 60px 0 30px;
      margin-top: 60px;
      font-size: 0.92rem;
    }

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

    .footer-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }

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

    .footer-links a,
    .footer-friend-links a {
      color: #b0b6cf;
      text-decoration: none;
      transition: color 0.25s;
    }

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

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-friend-links a {
      background: rgba(255, 255, 255, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.85rem;
    }

    .qr-contact-box {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .qr-img-wrap {
      width: 90px;
      background: #fff;
      padding: 4px;
      border-radius: 6px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      text-align: center;
      color: #8c93af;
      font-size: 0.85rem;
    }

    /* 浮动客服入口 */
    .float-service {
      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: linear-gradient(135deg, #ff5e62, #5c3bf5);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 6px 18px rgba(92, 59, 245, 0.35);
      font-weight: bold;
      font-size: 1.1rem;
      cursor: pointer;
      border: none;
      transition: transform 0.25s, box-shadow 0.25s;
    }

    .float-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 8px 24px rgba(92, 59, 245, 0.5);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-data-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .grid-3,
      .grid-2,
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-card {
        flex-direction: column;
        text-align: center;
      }
      .score-badge {
        flex-direction: column;
      }
    }