/* roulang page: index */
:root {
      --primary: #00E575;
      --primary-dark: #00B85E;
      --primary-soft: rgba(0, 229, 117, 0.12);
      --bg-dark: #0A0B0D;
      --bg-dark-card: #14161B;
      --bg-light: #F9FAFB;
      --bg-white: #FFFFFF;
      --text-main: #111827;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --border-color: #E5E7EB;
      --border-dark: #22262F;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 24px -6px rgba(0, 0, 0, 0.08);
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--primary-dark);
    }

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

    /* 顶部活动阶段状态栏与主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .status-bar {
      background: var(--bg-dark);
      color: #D1D5DB;
      font-size: 0.8125rem;
      padding: 0.45rem 1rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .status-chips {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .phase-chip {
      display: inline-flex;
      align-items: center;
      padding: 0.15rem 0.6rem;
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 500;
    }
    .phase-chip.idle {
      background: rgba(255, 255, 255, 0.12);
      color: #9CA3AF;
    }
    .phase-chip.active {
      background: var(--primary-soft);
      color: var(--primary);
      border: 1px solid var(--primary);
    }
    .pulse-dot {
      width: 6px;
      height: 6px;
      background-color: var(--primary);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 6px var(--primary);
    }

    .main-nav {
      padding: 0.85rem 1rem;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-badge {
      background: var(--primary);
      color: #000;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 0.15rem 0.45rem;
      border-radius: var(--radius-sm);
      text-transform: uppercase;
    }
    .nav-links {
      display: flex;
      gap: 1.75rem;
      align-items: center;
      font-size: 0.9375rem;
      font-weight: 500;
    }
    .nav-links a {
      color: var(--text-muted);
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--text-main);
      font-weight: 600;
    }

    /* 按钮样式体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 0.75rem 1.6rem;
      border-radius: var(--radius-sm);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      cursor: pointer;
      border: 1px solid transparent;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--primary);
      color: #052614;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      color: #ffffff;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--text-main);
      background: #FAFAFA;
    }
    .btn-outline-white {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }
    .btn-outline-white:hover {
      background: #FFFFFF;
      color: #000000;
    }

    /* 板块排版与通用卡片 */
    .section-wrap {
      padding: 5.5rem 0;
      position: relative;
    }
    .bg-light-alt {
      background-color: var(--bg-light);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .bg-dark-theme {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary-dark);
      background: var(--primary-soft);
      padding: 0.25rem 0.65rem;
      border-radius: var(--radius-sm);
      margin-bottom: 0.75rem;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }
    .bg-dark-theme .section-tag {
      background: rgba(0, 229, 117, 0.15);
      color: var(--primary);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.25;
      margin-bottom: 1rem;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 760px;
      line-height: 1.7;
    }
    .bg-dark-theme .section-desc {
      color: #9CA3AF;
    }

    /* 闪购/倒计时条组件 */
    .flash-notice-bar {
      background: #0F172A;
      border-bottom: 1px solid #1E293B;
      color: #F8FAFC;
      padding: 0.65rem 0;
      font-size: 0.875rem;
    }
    .flash-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.75rem;
    }
    .countdown-box {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      font-family: monospace;
      font-size: 0.95rem;
    }
    .countdown-unit {
      background: #334155;
      color: var(--primary);
      padding: 0.1rem 0.35rem;
      border-radius: 2px;
      font-weight: 700;
    }

    /* Hero 首屏 */
    .hero-section {
      padding: 4.5rem 0 5.5rem;
      background: radial-gradient(circle at top right, rgba(0, 229, 117, 0.08) 0%, transparent 45%);
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.03em;
      color: var(--text-main);
      margin-bottom: 1.25rem;
    }
    .hero-p {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 2rem;
    }
    .hero-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.06);
      overflow: hidden;
    }
    .hero-card-img {
      height: 240px;
      object-fit: cover;
      width: 100%;
    }
    .hero-card-body {
      padding: 1.5rem;
    }

    /* 卖点三连卡片 */
    .selling-point-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.25rem 1.75rem;
      height: 100%;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .selling-point-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #D1D5DB;
    }
    .sp-num {
      font-size: 2.25rem;
      font-weight: 800;
      color: #E5E7EB;
      line-height: 1;
      margin-bottom: 1rem;
    }
    .sp-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
    }
    .sp-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 入口矩阵栅格 */
    .portal-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      display: block;
      transition: all 0.25s ease;
      height: 100%;
    }
    .portal-card:hover {
      border-color: var(--primary);
      box-shadow: 0 4px 12px rgba(0, 229, 117, 0.15);
    }
    .portal-icon-box {
      width: 44px;
      height: 44px;
      background: var(--primary-soft);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 1rem;
    }
    .portal-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 0.35rem;
      color: var(--text-main);
    }
    .portal-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 热门专题与最新发布卡片 */
    .content-article-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .content-article-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .card-cover {
      height: 190px;
      width: 100%;
      object-fit: cover;
      background: #F3F4F6;
    }
    .card-content {
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .card-meta {
      font-size: 0.75rem;
      color: var(--text-light);
      margin-bottom: 0.5rem;
      display: flex;
      justify-content: space-between;
    }
    .card-h {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 0.75rem;
    }
    .card-p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1rem;
      flex-grow: 1;
    }

    /* 数据指标看板 */
    .metric-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 2.25rem 1.5rem;
      text-align: center;
      height: 100%;
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 0.5rem;
      font-family: monospace;
    }
    .metric-label {
      font-size: 1rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 0.5rem;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: #9CA3AF;
      line-height: 1.4;
    }

    /* 真实口碑引用卡片 */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      height: 100%;
    }
    .review-quote {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 1.5rem;
      font-style: italic;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary-dark);
    }
    .reviewer-name {
      font-size: 0.9375rem;
      font-weight: 700;
    }
    .reviewer-role {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* SLA 与合规保障卡片 */
    .sla-item {
      border-left: 2px solid var(--primary);
      padding-left: 1.25rem;
      margin-bottom: 1.5rem;
    }
    .sla-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 0.25rem;
    }
    .sla-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 手风琴常见疑虑响应 */
    .faq-accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 0.75rem;
      background: #FFFFFF;
      overflow: hidden;
    }
    .faq-question {
      padding: 1.25rem 1.5rem;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
    }
    .faq-answer {
      padding: 0 1.5rem 1.25rem;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 演示预约表单 */
    .demo-form-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.5rem;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 1.25rem;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 0.4rem;
    }
    .form-input {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-input:focus {
      border-color: var(--primary);
    }

    /* 统一页脚 */
    .site-footer {
      background: #08090B;
      color: #9CA3AF;
      padding: 4.5rem 0 2rem;
      font-size: 0.875rem;
      border-top: 1px solid #1F242D;
    }
    .footer-col-title {
      color: #FFFFFF;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links-list li {
      margin-bottom: 0.65rem;
    }
    .footer-links-list a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid #1A1D24;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.8125rem;
    }

    /* 移动端与断点优化 */
    @media (max-width: 1024px) {
      .hero-h1 {
        font-size: 2.35rem;
      }
      .section-title {
        font-size: 1.85rem;
      }
    }
    @media (max-width: 640px) {
      .hero-h1 {
        font-size: 1.85rem;
      }
      .section-wrap {
        padding: 3.75rem 0;
      }
      .nav-links {
        display: none;
      }
      .metric-value {
        font-size: 2.15rem;
      }
    }