/* roulang page: index */
:root {
      --bg-body: #F8F9FA;
      --bg-card: #FFFFFF;
      --bg-dark: #0F141C;
      --bg-dark-card: #18202C;
      --primary: #00D084;
      --primary-hover: #00B371;
      --accent-blue: #0A84FF;
      --text-main: #111827;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --border-color: #E5E7EB;
      --border-dark: #273344;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.1);
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      --container-max: 1240px;
    }

    * {
      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", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

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

    button, input {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .top-bar {
      background: #0B0E14;
      color: #9CA3AF;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }

    .nav-main {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      color: var(--text-main);
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, #111827, #00D084);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 900;
      font-size: 1.05rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }

    .nav-links a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
    }

    .nav-links a:hover, .nav-links a:focus {
      color: var(--text-main);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 44px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #052e16;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(0, 208, 132, 0.3);
    }

    .btn-outline {
      border-color: var(--border-color);
      background-color: #FFFFFF;
      color: var(--text-main);
    }

    .btn-outline:hover {
      background-color: #F3F4F6;
      border-color: #D1D5DB;
    }

    .btn-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background-color: #1F2937;
      transform: translateY(-2px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 通用板块与排版 */
    .section {
      padding: 96px 0;
      position: relative;
    }

    .section-light {
      background-color: var(--bg-body);
    }

    .section-white {
      background-color: #FFFFFF;
    }

    .section-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .tag-badge {
      display: inline-flex;
      align-items: center;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      margin-bottom: 14px;
      background-color: rgba(0, 208, 132, 0.12);
      color: #047857;
    }

    .tag-badge.badge-dark {
      background: rgba(255, 255, 255, 0.1);
      color: var(--primary);
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

    .section-subtitle {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .section-dark .section-subtitle {
      color: #9CA3AF;
    }

    /* Section 1: Hero (紧凑创作者舞台蓝图) */
    .hero-banner {
      background-image: linear-gradient(to right, rgba(15, 20, 28, 0.94), rgba(15, 20, 28, 0.85)), url('/assets/images/c01e1f9516330c3b.jpg');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      padding: 72px 0 88px;
      border-bottom: 1px solid var(--border-dark);
    }

    .hero-profile-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      backdrop-filter: blur(10px);
    }

    .hero-header-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .hero-avatar-group {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .hero-avatar {
      width: 72px;
      height: 72px;
      border-radius: var(--radius-md);
      border: 2px solid var(--primary);
      object-fit: cover;
    }

    .hero-h1 {
      font-size: 2.25rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.2;
    }

    .hero-desc {
      font-size: 1.05rem;
      color: #D1D5DB;
      margin-bottom: 28px;
      line-height: 1.8;
      max-width: 900px;
    }

    .hero-stat-ribbon {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      margin-top: 28px;
    }

    .hero-stat-item h4 {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .hero-stat-item p {
      font-size: 0.875rem;
      color: #9CA3AF;
    }

    /* Section 2: 行业痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #F87171;
    }

    .pain-icon-wrapper {
      width: 48px;
      height: 48px;
      background: #FEE2E2;
      color: #DC2626;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin-bottom: 20px;
    }

    .pain-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .pain-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 3: 架构与解决方案 */
    .arch-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .arch-feature-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 28px;
    }

    .arch-feature-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: var(--bg-body);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .arch-num {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--text-main);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8125rem;
      font-weight: 700;
      flex-shrink: 0;
    }

    .arch-image-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
    }

    /* Section 4: 核心优势六宫格 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition);
      position: relative;
    }

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

    .adv-number {
      font-size: 0.8125rem;
      font-weight: 800;
      color: var(--primary);
      background: rgba(0, 208, 132, 0.1);
      padding: 4px 10px;
      border-radius: var(--radius-full);
      display: inline-block;
      margin-bottom: 16px;
    }

    .adv-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .adv-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 5: 热门模块矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #D1D5DB;
    }

    .product-img-box {
      height: 200px;
      width: 100%;
      overflow: hidden;
      background: #111827;
    }

    .product-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .product-card:hover .product-img-box img {
      transform: scale(1.05);
    }

    .product-body {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .product-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .product-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    /* Section 6: 深色沉浸运算流程 */
    .step-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      margin-top: 40px;
    }

    .step-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
    }

    .step-badge {
      font-size: 1rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .step-badge::after {
      content: '';
      flex: 1;
      height: 1px;
      background: rgba(255, 255, 255, 0.1);
    }

    .step-card h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.875rem;
      color: #9CA3AF;
      line-height: 1.65;
    }

    /* Section 7: 适用业务场景 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .scene-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }

    .scene-card:hover {
      border-color: var(--accent-blue);
      box-shadow: var(--shadow-sm);
    }

    .scene-card h3 {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .scene-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 8: 核心量化指标通栏 */
    .metrics-strip {
      background: linear-gradient(135deg, #0B0E14 0%, #161F2E 100%);
      color: #FFFFFF;
      padding: 64px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-val {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -0.02em;
    }

    .metric-name {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 4px;
    }

    .metric-desc {
      font-size: 0.8125rem;
      color: #9CA3AF;
    }

    /* Section 9: 客户故事与实效证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-quote-mark {
      font-size: 2.5rem;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 12px;
    }

    .testi-text {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 16px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }

    .testi-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .testi-info p {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* Section 10: 动态前沿资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .news-meta {
      font-size: 0.8125rem;
      color: var(--accent-blue);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .news-card h3 {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    /* Section 11: 常见问题手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #D1D5DB;
    }

    .faq-summary {
      padding: 22px 28px;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }

    .faq-summary::-webkit-details-marker {
      display: none;
    }

    .faq-summary::after {
      content: '+';
      font-size: 1.35rem;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.2s ease;
    }

    details[open] .faq-summary::after {
      content: '−';
      color: var(--primary);
    }

    .faq-content {
      padding: 0 28px 24px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid #F3F4F6;
      padding-top: 16px;
    }

    /* Section 12: 底部全幅高转化 CTA */
    .cta-card {
      background: #0B0E14;
      background-image: linear-gradient(135deg, rgba(15, 20, 28, 0.96), rgba(11, 14, 20, 0.94)), url('/assets/images/feaaae22d3a09ff5.jpg');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      text-align: center;
      color: #FFFFFF;
      border: 1px solid var(--border-dark);
    }

    .cta-card h2 {
      font-size: 2.25rem;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .cta-card p {
      font-size: 1.05rem;
      color: #D1D5DB;
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

    .cta-form {
      display: flex;
      max-width: 540px;
      margin: 0 auto 20px;
      gap: 12px;
    }

    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-dark);
      background: rgba(255, 255, 255, 0.08);
      color: #FFFFFF;
      font-size: 0.9375rem;
      outline: none;
      transition: var(--transition);
    }

    .cta-input:focus {
      border-color: var(--primary);
      background: rgba(255, 255, 255, 0.12);
    }

    .cta-input::placeholder {
      color: #6B7280;
    }

    .cta-note {
      font-size: 0.8125rem;
      color: #9CA3AF;
    }

    /* 页脚 */
    .site-footer {
      background: #0B0E14;
      color: #9CA3AF;
      border-top: 1px solid var(--border-dark);
      padding: 72px 0 32px;
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 0.9fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      color: #FFFFFF;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-brand p {
      line-height: 1.75;
      margin-bottom: 20px;
      color: #6B7280;
    }

    .footer-col h4 {
      font-size: 0.9375rem;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .footer-contact-info {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      color: #9CA3AF;
      line-height: 1.7;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #6B7280;
    }

    .footer-bottom a {
      color: #9CA3AF;
    }

    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-stat-ribbon {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .pain-grid, .advantage-grid, .product-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-layout {
        grid-template-columns: 1fr;
      }
      .step-timeline, .scene-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .section {
        padding: 64px 0;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .hero-h1 {
        font-size: 1.75rem;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .pain-grid, .advantage-grid, .product-grid, .news-grid, .testimonial-grid, .step-timeline, .scene-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .hero-avatar-group {
        flex-direction: column;
        align-items: flex-start;
      }
      .hero-stat-ribbon {
        grid-template-columns: 1fr;
      }
      .metric-val {
        font-size: 2.5rem;
      }
    }