/* roulang page: index */
:root {
      --primary: #00D084;
      --primary-hover: #00B371;
      --accent: #FF5A1F;
      --bg-dark: #0F141C;
      --bg-dark-card: #18202C;
      --bg-light: #F4F6F9;
      --bg-card: #FFFFFF;
      --text-head: #111827;
      --text-body: #4B5563;
      --text-muted: #9CA3AF;
      --border-color: #E5E7EB;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 20, 28, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 20, 28, 0.08);
      --shadow-lg: 0 16px 36px -6px rgba(15, 20, 28, 0.12);
      --transition: all 0.25s ease-in-out;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.75;
      letter-spacing: 0.02em;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, h5 {
      color: var(--text-head);
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 0.8rem;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.85rem 1.85rem;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 9999px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #0F141C;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-3px);
      box-shadow: 0 10px 20px -5px rgba(0, 208, 132, 0.4);
      color: #0F141C;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background-color: #E04812;
      transform: translateY(-3px);
      box-shadow: 0 10px 20px -5px rgba(255, 90, 31, 0.35);
      color: #FFFFFF;
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.35);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(8px);
    }
    .btn-outline:hover {
      background: #FFFFFF;
      color: var(--bg-dark);
      transform: translateY(-3px);
    }

    /* 布局框架 */
    .app-layout {
      display: flex;
      min-height: 100vh;
    }

    /* 桌面端左侧竖向导航 */
    .app-sidebar {
      width: 260px;
      background: #0B0E14;
      border-right: 1px solid rgba(255, 255, 255, 0.08);
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      z-index: 100;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 2rem 1.25rem 1.5rem;
    }
    .brand-box {
      margin-bottom: 2rem;
    }
    .brand-logo {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      letter-spacing: -0.01em;
    }
    .brand-logo-badge {
      background: var(--primary);
      color: #0B0E14;
      font-size: 0.65rem;
      font-weight: 700;
      padding: 0.15rem 0.45rem;
      border-radius: 4px;
      text-transform: uppercase;
    }
    .brand-status {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 0.75rem;
      color: #10B981;
      margin-top: 0.6rem;
    }
    .brand-status::before {
      content: "";
      width: 6px;
      height: 6px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }
    .nav-menu {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
      flex-grow: 1;
    }
    .nav-item a {
      display: block;
      padding: 0.65rem 0.9rem;
      color: #94A3B8;
      font-size: 0.9rem;
      font-weight: 500;
      border-radius: var(--radius-sm);
    }
    .nav-item a:hover,
    .nav-item.active a {
      background: rgba(0, 208, 132, 0.12);
      color: var(--primary);
    }
    .sidebar-footer {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 1rem;
      font-size: 0.75rem;
      color: #64748B;
      line-height: 1.6;
    }

    /* 移动端顶栏 */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: #0B0E14;
      z-index: 110;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .mobile-header-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1rem;
    }
    .mobile-scroll-nav {
      display: flex;
      overflow-x: auto;
      white-space: nowrap;
      padding: 0.5rem 1rem;
      background: rgba(255, 255, 255, 0.03);
      gap: 0.75rem;
      -webkit-overflow-scrolling: touch;
    }
    .mobile-scroll-nav::-webkit-scrollbar { display: none; }
    .mobile-scroll-nav a {
      font-size: 0.825rem;
      color: #94A3B8;
      padding: 0.35rem 0.65rem;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.05);
    }
    .mobile-scroll-nav a:hover,
    .mobile-scroll-nav a:active {
      color: #0F141C;
      background: var(--primary);
    }

    /* 右侧主视区 */
    .app-main-content {
      margin-left: 260px;
      flex: 1;
      width: calc(100% - 260px);
      min-width: 0;
    }

    /* 通用板块规范 */
    .content-section {
      padding: 5.5rem 2rem;
      position: relative;
    }
    .content-section.section-alt {
      background-color: #FFFFFF;
    }
    .content-section.section-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }
    .content-section.section-dark h2,
    .content-section.section-dark h3,
    .content-section.section-dark h4 {
      color: #FFFFFF;
    }
    .content-section.section-dark p {
      color: #94A3B8;
    }
    .section-wrap {
      max-width: 1160px;
      margin: 0 auto;
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 0.5rem;
    }
    .section-dark .section-tag {
      color: var(--primary);
    }
    .section-title {
      font-size: 2.25rem;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 1.05rem;
      max-width: 780px;
      color: var(--text-body);
      margin-top: 0.75rem;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块一：Hero */
    .hero-section {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(15, 20, 28, 0.94) 0%, rgba(15, 20, 28, 0.82) 100%),
                  url('/assets/images/bc5f6953b2237f60.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 6rem 2rem;
      position: relative;
    }
    .hero-content {
      max-width: 820px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.4rem 1rem;
      background: rgba(0, 208, 132, 0.15);
      border: 1px solid rgba(0, 208, 132, 0.3);
      border-radius: 9999px;
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .hero-title {
      font-size: 3.25rem;
      color: #FFFFFF;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 2.5rem;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1.2rem;
      align-items: center;
    }
    .hero-metrics {
      display: flex;
      gap: 2.5rem;
      margin-top: 3.5rem;
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
    }
    .hero-metric-item h4 {
      color: var(--primary);
      font-size: 1.75rem;
      margin-bottom: 0.2rem;
    }
    .hero-metric-item span {
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* 常见卡片基类 */
    .app-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 208, 132, 0.4);
    }
    .app-card-dark {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: #CBD5E1;
    }
    .app-card-dark:hover {
      border-color: var(--primary);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

    /* 板块二：痛点对比 */
    .painpoint-card {
      border-left: 4px solid var(--accent);
    }
    .painpoint-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 0.75rem;
    }
    .painpoint-vs {
      background: var(--bg-light);
      padding: 1rem;
      border-radius: var(--radius-sm);
      margin-top: 1rem;
      font-size: 0.9rem;
      border-left: 3px solid var(--primary);
    }

    /* 板块三：产品矩阵与参数 */
    .matrix-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 3rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .matrix-spec-badge {
      display: inline-block;
      padding: 0.35rem 0.8rem;
      background: #ECFDF5;
      color: #065F46;
      border-radius: 6px;
      font-weight: 700;
      font-size: 0.85rem;
      margin-bottom: 1rem;
    }

    /* 板块四：核心特性 6格 */
    .feature-icon-box {
      width: 52px;
      height: 52px;
      background: rgba(0, 208, 132, 0.1);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin-bottom: 1.25rem;
    }

    /* 板块五：非对称场景卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 1.5rem;
    }
    .scenario-grid .full-span {
      grid-column: 1 / -1;
    }
    .scenario-card-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
      border-radius: var(--radius-sm);
      margin-bottom: 1.25rem;
    }

    /* 板块七：水平步骤流程 */
    .step-item {
      position: relative;
      padding: 1.5rem;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      height: 100%;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #0B0E14;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 1rem;
      font-size: 1.1rem;
    }

    /* 板块八：统计横幅 */
    .stat-banner {
      background: linear-gradient(135deg, #0B0E14 0%, #18202C 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem 2rem;
      color: #FFFFFF;
      text-align: center;
    }
    .stat-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 0.5rem;
    }
    .stat-label {
      font-size: 0.95rem;
      color: #94A3B8;
    }

    /* 板块九：达人故事 */
    .story-item {
      display: flex;
      gap: 2rem;
      background: #FFFFFF;
      padding: 2rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      align-items: center;
      margin-bottom: 1.5rem;
    }
    .story-avatar {
      width: 130px;
      height: 130px;
      border-radius: 50%;
      object-fit: cover;
      flex-shrink: 0;
      border: 3px solid var(--primary);
    }

    /* 板块十：用户真实评价 */
    .review-user {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 1rem;
    }
    .review-user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #334155;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 0.85rem;
      margin-bottom: 0.5rem;
    }

    /* 板块十一：资讯卡片 */
    .news-thumb {
      height: 180px;
      width: 100%;
      object-fit: cover;
      border-radius: var(--radius-sm);
      margin-bottom: 1rem;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 0.4rem;
    }

    /* 板块十二：FAQ 原生手风琴 */
    .accordion {
      background: transparent;
      border: none;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm) !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .accordion-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-head);
      padding: 1.25rem 1.5rem;
      border: none;
      transition: var(--transition);
    }
    .accordion-title:hover,
    .accordion-title:focus {
      background: #F8FAFC;
      color: var(--primary-hover);
    }
    .accordion-content {
      padding: 1.25rem 1.5rem;
      color: var(--text-body);
      border-top: 1px solid var(--border-color);
      background: #FFFFFF;
    }

    /* 收口 CTA */
    .final-cta-section {
      background: linear-gradient(135deg, #0F141C 0%, #111D2C 100%);
      padding: 5rem 2rem;
      border-radius: var(--radius-lg);
      color: #FFFFFF;
      text-align: center;
      margin: 2rem 0;
    }
    .final-cta-box {
      max-width: 720px;
      margin: 0 auto;
    }

    /* 页脚 */
    .app-footer {
      background: #0B0E14;
      color: #94A3B8;
      padding: 4rem 2rem 2.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 3rem;
      max-width: 1160px;
      margin: 0 auto 3rem;
    }
    .footer-bottom {
      max-width: 1160px;
      margin: 0 auto;
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 1rem;
      font-size: 0.8rem;
    }

    /* 响应式断点 */
    @media (max-width: 1023px) {
      .app-sidebar { display: none; }
      .mobile-header { display: block; }
      .app-main-content {
        margin-left: 0;
        width: 100%;
        padding-top: 98px;
      }
      .hero-title { font-size: 2.25rem; }
      .scenario-grid { grid-template-columns: 1fr; }
      .story-item { flex-direction: column; text-align: center; }
      .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    }
    @media (max-width: 640px) {
      .content-section { padding: 3.5rem 1.25rem; }
      .hero-title { font-size: 1.85rem; }
      .hero-metrics { flex-direction: column; gap: 1.25rem; }
      .stat-banner { padding: 2.5rem 1rem; }
      .matrix-box { padding: 1.75rem; }
    }