/* roulang page: index */
:root {
      --primary: #1A162B;
      --accent-purple: #7B2CBF;
      --accent-pink: #FF006E;
      --accent-gradient: linear-gradient(135deg, #7B2CBF 0%, #FF006E 100%);
      --surface-light: #F8F9FD;
      --surface-card: #FFFFFF;
      --surface-dark: #0F0D17;
      --surface-dark-card: #1A1726;
      --text-main: #2D3142;
      --text-muted: #7B8293;
      --text-light: #FFFFFF;
      --border-light: #E8EBF2;
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 20px -2px rgba(16, 24, 40, 0.05);
      --shadow-lg: 0 20px 32px -4px rgba(16, 24, 40, 0.12);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      background-color: #FFFFFF;
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    button, input, textarea, select { font-family: inherit; font-size: 1rem; }
    
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    /* 顶部导航 */
    .top-bar {
      background-color: #F1F3F9;
      font-size: 0.85rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-light);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    }
    .header-main {
      position: sticky;
      top: 0;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      z-index: 1000;
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo span {
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 32px;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-main);
      font-size: 0.95rem;
    }
    .nav-link:hover { color: var(--accent-purple); }
    .btn-cta {
      background: var(--accent-gradient);
      color: #FFFFFF;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.92rem;
      box-shadow: 0 4px 14px rgba(123, 44, 191, 0.25);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-cta:hover {
      box-shadow: 0 6px 20px rgba(255, 0, 110, 0.35);
      transform: translateY(-1px);
    }
    
    /* 板块通用 */
    .section-spacing {
      padding: 96px 0;
    }
    .section-light {
      background-color: var(--surface-light);
    }
    .section-white {
      background-color: #FFFFFF;
    }
    .section-dark {
      background-color: var(--surface-dark);
      color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }
    .badge-sub {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(123, 44, 191, 0.08);
      color: var(--accent-purple);
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 14px;
      border: 1px solid rgba(123, 44, 191, 0.15);
    }
    .badge-dark {
      background: rgba(255, 0, 110, 0.15);
      color: #FF70A6;
      border-color: rgba(255, 0, 110, 0.3);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }
    .section-intro {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-intro {
      color: #A0A5B5;
    }
    
    /* 1. Hero 蓝图：白皮书获客与全貌 */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(123, 44, 191, 0.12) 0%, rgba(255, 255, 255, 0) 60%), #FFFFFF;
      padding: 72px 0 96px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 56px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.18;
      color: var(--primary);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-whitepaper-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .hero-whitepaper-card::before {
      content: "";
      position: absolute;
      top: 0; left: 0; right: 0; height: 4px;
      background: var(--accent-gradient);
    }
    .wp-cover-wrap {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 20px;
      border: 1px solid var(--border-light);
      background-color: #FAFAFC;
    }
    .wp-toc {
      list-style: none;
      margin-bottom: 24px;
    }
    .wp-toc li {
      font-size: 0.88rem;
      color: var(--text-main);
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-light);
      display: flex;
      justify-content: space-between;
    }
    .form-download {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .form-input {
      padding: 12px 16px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      background: #FBFBFC;
      color: var(--text-main);
      outline: none;
    }
    .form-input:focus {
      border-color: var(--accent-purple);
      background: #FFFFFF;
    }
    
    /* 2. 痛点与破局 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(123, 44, 191, 0.3);
    }
    .pain-tag {
      color: #E63946;
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .solution-tag {
      color: #10B981;
      font-size: 0.8rem;
      font-weight: 700;
      margin-top: 16px;
      margin-bottom: 6px;
      display: block;
    }
    .pain-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--primary);
    }
    
    /* 3. 架构介绍与技术参数 */
    .arch-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .param-box {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-left: 4px solid var(--accent-purple);
      padding: 20px 24px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin: 24px 0;
    }
    .param-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent-purple);
      margin-bottom: 4px;
    }
    
    /* 4. 优势 6 卡片 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .adv-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(123, 44, 191, 0.1);
      color: var(--accent-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .adv-list {
      list-style: none;
      margin-top: 14px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .adv-list li {
      margin-bottom: 6px;
      position: relative;
      padding-left: 14px;
    }
    .adv-list li::before {
      content: "•";
      position: absolute;
      left: 0;
      color: var(--accent-pink);
    }

    /* 5. 时段卡 / 方案集群 */
    .slot-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .slot-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .slot-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .slot-img-wrap {
      height: 190px;
      overflow: hidden;
      background: #E8EBF2;
    }
    .slot-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .slot-card:hover .slot-img-wrap img {
      transform: scale(1.05);
    }
    .slot-body {
      padding: 24px;
    }
    .slot-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      background: #F1F3F9;
      color: var(--text-muted);
      border-radius: 4px;
      margin-bottom: 10px;
    }
    
    /* 6. 专家团队 */
    .team-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .team-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: var(--transition);
    }
    .team-card:hover {
      border-color: var(--accent-purple);
      transform: translateY(-3px);
    }
    .team-avatar {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      margin: 0 auto 16px auto;
      object-fit: cover;
      border: 2px solid var(--accent-purple);
    }
    .team-role {
      color: var(--accent-purple);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 8px;
    }
    
    /* 7. 交付实施步骤 */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      position: relative;
    }
    .flow-num {
      font-size: 2rem;
      font-weight: 900;
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 12px;
    }
    
    /* 8. 深色理念高地 */
    .concept-box {
      border: 1px solid var(--border-dark);
      background: var(--surface-dark-card);
      border-radius: var(--radius-md);
      padding: 56px 40px;
      position: relative;
      overflow: hidden;
    }
    .concept-box::after {
      content: "";
      position: absolute;
      right: -100px;
      bottom: -100px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(255, 0, 110, 0.25) 0%, rgba(0, 0, 0, 0) 70%);
      pointer-events: none;
    }
    
    /* 9. 核心指标带 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-value {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--accent-purple);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-lbl {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 10. 评价与保障体系 */
    .eval-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .eval-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .eval-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .eval-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
    }
    .eval-logo {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: #F1F3F9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    /* 11. 资讯动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: block;
    }
    
    /* 12. 转化预约表单 */
    .cta-container {
      background: var(--surface-dark);
      border-radius: var(--radius-md);
      padding: 64px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      border: 1px solid var(--border-dark);
    }
    .cta-form {
      background: rgba(255, 255, 255, 0.05);
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dark);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-form input, .cta-form select {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid var(--border-dark);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      outline: none;
    }
    .cta-form input:focus, .cta-form select:focus {
      border-color: var(--accent-pink);
    }
    .cta-form select option {
      background: var(--surface-dark);
      color: #FFFFFF;
    }

    /* 页脚 */
    .footer-main {
      background-color: #0A0810;
      color: #8C90A4;
      padding: 72px 0 32px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.3rem;
      margin-bottom: 14px;
    }
    .footer-links-title {
      color: #FFFFFF;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      text-align: center;
      font-size: 0.8rem;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-layout, .cta-container { grid-template-columns: 1fr; }
      .pain-grid, .advantage-grid, .slot-grid, .eval-grid, .news-grid { grid-template-columns: 1fr 1fr; }
      .team-grid, .workflow-grid, .metrics-bar { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 640px) {
      .section-spacing { padding: 56px 0; }
      .hero-h1 { font-size: 2.1rem; }
      .section-title { font-size: 1.7rem; }
      .pain-grid, .advantage-grid, .slot-grid, .eval-grid, .news-grid,
      .team-grid, .workflow-grid, .metrics-bar, .footer-grid { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
      .cta-container { padding: 32px 20px; }
    }