/* roulang page: index */
:root {
      --primary: #00B074;
      --primary-hover: #009361;
      --primary-dark: #006b47;
      --accent: #FF7A00;
      --accent-hover: #e06c00;
      --dark-base: #0F172A;
      --dark-card: #1E293B;
      --code-bg: #0B1120;
      --light-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 6px -1px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 6px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.1);
    }

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: #FFFFFF;
      line-height: 1.7;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      transition: all 0.25s ease;
    }

    /* 顶部服务状态条 */
    .utility-bar {
      background-color: #0B132B;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .utility-bar a {
      color: #94A3B8;
    }
    .utility-bar a:hover {
      color: var(--primary);
    }

    /* 主导航 */
    .site-nav {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      letter-spacing: -0.5px;
    }
    .brand-logo i {
      color: var(--primary);
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-body) !important;
      padding: 0.5rem 0.85rem !important;
      font-size: 0.9375rem;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
    }

    /* 按钮规范 */
    .btn-main {
      background-color: var(--primary);
      border: 1px solid var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.4rem;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      min-height: 44px;
    }
    .btn-main:hover {
      background-color: var(--primary-hover);
      border-color: var(--primary-hover);
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(0, 176, 116, 0.35);
      transform: translateY(-2px);
    }
    .btn-sub {
      background-color: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.4rem;
      transition: all 0.25s ease;
      min-height: 44px;
    }
    .btn-sub:hover {
      background-color: var(--light-bg);
      border-color: #CBD5E1;
      color: var(--primary);
    }
    .btn-accent {
      background-color: var(--accent);
      border: 1px solid var(--accent);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.4rem;
      min-height: 44px;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(255, 122, 0, 0.3);
    }

    /* 标题与板块 */
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    .section-title-wrap {
      margin-bottom: 3.5rem;
    }
    .section-badge {
      display: inline-block;
      padding: 0.3rem 0.85rem;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      border-radius: 50px;
      background-color: rgba(0, 176, 116, 0.12);
      color: var(--primary-dark);
      margin-bottom: 0.85rem;
    }
    .section-badge.dark-badge {
      background-color: rgba(0, 176, 116, 0.2);
      color: #34D399;
    }
    .section-heading {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.3;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 720px;
      margin-top: 0.75rem;
    }

    /* 板块一：Hero 轮播 */
    .hero-slider-section {
      background: #090F1D;
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
    }
    .carousel-item {
      padding: 4.5rem 0 5.5rem;
      min-height: 560px;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.25rem;
      letter-spacing: -1px;
    }
    .hero-p {
      color: #94A3B8;
      font-size: 1.125rem;
      margin-bottom: 2rem;
      max-width: 620px;
    }
    .hero-terminal-mockup {
      background: #0B1120;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      overflow: hidden;
    }
    .hero-terminal-header {
      background: #151E32;
      padding: 0.6rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .circle-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      display: inline-block;
    }
    .dot-red { background: #EF4444; }
    .dot-yellow { background: #F59E0B; }
    .dot-green { background: #10B981; }

    /* 板块二：状态增强条 */
    .status-strip-section {
      background: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.875rem;
      padding: 0.85rem 0;
    }
    .status-pulse {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(0, 176, 116, 0.25);
    }

    /* 样式卡片基底 */
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 176, 116, 0.1);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 1.25rem;
    }

    /* 板块六：深色技术底座 */
    .dark-immersion-section {
      background: var(--dark-base);
      color: #E2E8F0;
    }
    .dark-immersion-section .section-heading {
      color: #FFFFFF;
    }
    .dark-card-box {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 1.5rem;
    }
    .code-editor-pre {
      background: var(--code-bg);
      color: #38BDF8;
      font-family: Consolas, Monaco, "Courier New", monospace;
      padding: 1.25rem;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      overflow-x: auto;
      border: 1px solid rgba(255,255,255,0.05);
      margin-bottom: 0;
    }

    /* 板块八：指标条 */
    .metrics-bar-section {
      background: #0B132B;
      color: #FFFFFF;
      padding: 3.5rem 0;
      border-top: 1px solid rgba(255,255,255,0.1);
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: #34D399;
      line-height: 1;
      margin-bottom: 0.5rem;
      font-variant-numeric: tabular-nums;
    }
    .metric-label {
      color: #94A3B8;
      font-size: 0.9375rem;
    }

    /* 常见问题 Accordion 定制 */
    .accordion-custom .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm) !important;
      margin-bottom: 0.75rem;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .accordion-custom .accordion-button {
      font-weight: 700;
      color: var(--text-main);
      padding: 1.25rem 1.5rem;
      background-color: #FFFFFF;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background-color: rgba(0, 176, 116, 0.05);
      color: var(--primary-dark);
      box-shadow: none;
    }
    .accordion-custom .accordion-button:focus {
      box-shadow: none;
      border-color: rgba(0, 176, 116, 0.3);
    }
    .accordion-custom .accordion-body {
      color: var(--text-body);
      padding: 1.25rem 1.5rem;
      font-size: 0.95rem;
      line-height: 1.75;
      background: #FFFFFF;
    }

    /* 板块十三：全幅开通 CTA */
    .cta-banner-wrap {
      background: linear-gradient(135deg, #064E3B 0%, #0F172A 100%);
      border-radius: var(--radius-lg);
      padding: 4rem 2.5rem;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.1);
    }

    /* 页脚 */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      font-size: 0.875rem;
      padding-top: 4rem;
      padding-bottom: 2rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-heading {
      color: #F8FAFC;
      font-weight: 700;
      margin-bottom: 1.25rem;
      font-size: 1rem;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: #34D399;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.06);
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      font-size: 0.8125rem;
    }

    @media (max-width: 991px) {
      .hero-title { font-size: 2.25rem; }
      .section-heading { font-size: 1.75rem; }
      .section-spacing { padding-top: 3.5rem; padding-bottom: 3.5rem; }
    }