/* roulang page: index */
:root {
      --clr-obsidian: #0B0D10;
      --clr-dark-card: #14171D;
      --clr-light-bg: #F6F8FA;
      --clr-white: #FFFFFF;
      --clr-slate-text: #20262E;
      --clr-muted-text: #64748B;
      --clr-accent-emerald: #00E599;
      --clr-accent-amber: #FF9F43;
      --clr-steel: #4E6172;
      --clr-border: rgba(15, 17, 21, 0.08);
      --clr-border-dark: rgba(255, 255, 255, 0.1);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --sidebar-width: 270px;
    }

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

    body {
      font-family: var(--font-stack);
      color: var(--clr-slate-text);
      background-color: var(--clr-light-bg);
      line-height: 1.7;
      letter-spacing: 0.01em;
      overflow-x: hidden;
    }

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

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

    /* 左侧 App Shell 导航体系 */
    .app-shell-sidebar {
      width: var(--sidebar-width);
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      background-color: var(--clr-obsidian);
      border-right: 1px solid var(--clr-border-dark);
      z-index: 1040;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 24px 20px;
      color: #E2E8F0;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--clr-border-dark);
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, #00E599 0%, #008B5D 100%);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #000;
      font-weight: 800;
    }

    .brand-title {
      font-size: 17px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #FFFFFF;
      line-height: 1.2;
    }

    .brand-sub {
      font-size: 11px;
      color: var(--clr-accent-emerald);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .sidebar-nav {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex-grow: 1;
      overflow-y: auto;
    }

    .sidebar-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 14px;
      border-radius: 6px;
      font-size: 13.5px;
      color: #94A3B8;
      font-weight: 500;
    }

    .sidebar-link:hover, .sidebar-link.active {
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.06);
    }

    .sidebar-link.active {
      border-left: 3px solid var(--clr-accent-emerald);
      color: var(--clr-accent-emerald);
      background: rgba(0, 229, 153, 0.08);
    }

    .sidebar-link i {
      font-size: 15px;
      width: 20px;
      text-align: center;
    }

    .sidebar-footer {
      padding-top: 20px;
      border-top: 1px solid var(--clr-border-dark);
    }

    .status-capsule {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      background: rgba(0, 229, 153, 0.1);
      color: var(--clr-accent-emerald);
      padding: 5px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .status-capsule .pulse {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background-color: var(--clr-accent-emerald);
      box-shadow: 0 0 8px var(--clr-accent-emerald);
    }

    /* 移动端 App Header */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: var(--clr-obsidian);
      z-index: 1050;
      padding: 0 16px;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--clr-border-dark);
    }

    /* 主内容区偏移 */
    .app-main-content {
      margin-left: var(--sidebar-width);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* 通用板块与排版 */
    .content-section {
      padding: 80px 0;
      position: relative;
    }

    .content-section.dark-mode {
      background-color: var(--clr-obsidian);
      color: #E2E8F0;
    }

    .content-section.white-mode {
      background-color: var(--clr-white);
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--clr-steel);
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 8px;
    }

    .dark-mode .section-eyebrow {
      color: var(--clr-accent-emerald);
    }

    .section-headline {
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 14px;
      color: var(--clr-slate-text);
    }

    .dark-mode .section-headline {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 15px;
      color: var(--clr-muted-text);
      max-width: 760px;
      margin-bottom: 40px;
      line-height: 1.7;
    }

    .dark-mode .section-desc {
      color: #94A3B8;
    }

    /* 卡片与通用组件 */
    .security-card {
      background: var(--clr-white);
      border: 1px solid var(--clr-border);
      border-radius: 6px;
      padding: 28px;
      transition: transform 0.25s ease, border-color 0.25s ease;
      height: 100%;
    }

    .dark-mode .security-card {
      background: var(--clr-dark-card);
      border-color: var(--clr-border-dark);
      color: #CBD5E1;
    }

    .security-card:hover {
      transform: translateY(-3px);
      border-color: #0F1115;
    }

    .dark-mode .security-card:hover {
      border-color: var(--clr-accent-emerald);
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      background: #F1F5F9;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--clr-slate-text);
      margin-bottom: 20px;
    }

    .dark-mode .card-icon-wrap {
      background: rgba(255, 255, 255, 0.05);
      color: var(--clr-accent-emerald);
    }

    .card-title-lg {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--clr-slate-text);
    }

    .dark-mode .card-title-lg {
      color: #FFFFFF;
    }

    .card-text-sm {
      font-size: 13.5px;
      color: var(--clr-muted-text);
      line-height: 1.6;
    }

    .dark-mode .card-text-sm {
      color: #94A3B8;
    }

    /* 按钮组 */
    .btn-shield-primary {
      background-color: #0F1115;
      color: #FFFFFF;
      padding: 12px 26px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 4px;
      border: 1px solid #0F1115;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-shield-primary:hover {
      background-color: #1E293B;
      color: #FFFFFF;
    }

    .btn-shield-emerald {
      background-color: var(--clr-accent-emerald);
      color: #0B0D10;
      padding: 12px 26px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 4px;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-shield-emerald:hover {
      background-color: #02c785;
      color: #000;
    }

    .btn-shield-outline {
      border: 1px solid #CBD5E1;
      color: var(--clr-slate-text);
      padding: 12px 24px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 4px;
      background: transparent;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-shield-outline:hover {
      border-color: #0F1115;
      background: #F8FAFC;
      color: #0F1115;
    }

    .dark-mode .btn-shield-outline {
      border-color: var(--clr-border-dark);
      color: #E2E8F0;
    }

    .dark-mode .btn-shield-outline:hover {
      border-color: var(--clr-accent-emerald);
      color: var(--clr-accent-emerald);
    }

    /* Hero Banner 黑金尊享感与工业科技融合 */
    .hero-banner-sec {
      background-color: var(--clr-obsidian);
      background-image: linear-gradient(180deg, rgba(11, 13, 16, 0.9) 0%, rgba(11, 13, 16, 0.96) 100%), url('/assets/images/284621fbe33160c2.png');
      background-size: cover;
      background-position: center;
      padding: 100px 0 80px 0;
      color: #FFFFFF;
      position: relative;
    }

    .hero-badge-tag {
      background: rgba(255, 159, 67, 0.15);
      border: 1px solid rgba(255, 159, 67, 0.4);
      color: #FFB067;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 4px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 20px;
    }

    .hero-title-h1 {
      font-size: 42px;
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #FFFFFF;
    }

    .hero-summary-p {
      font-size: 16px;
      color: #94A3B8;
      line-height: 1.75;
      margin-bottom: 36px;
      max-width: 680px;
    }

    .hero-stats-panel {
      background: rgba(20, 23, 29, 0.8);
      border: 1px solid var(--clr-border-dark);
      border-radius: 8px;
      padding: 24px;
      backdrop-filter: blur(8px);
    }

    /* 指标条 */
    .metrics-bar-wrap {
      background: #FFFFFF;
      border-bottom: 1px solid var(--clr-border);
      padding: 36px 0;
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--clr-obsidian);
      font-family: monospace;
      line-height: 1.1;
    }

    .metric-label {
      font-size: 13px;
      color: var(--clr-muted-text);
      margin-top: 6px;
      font-weight: 500;
    }

    /* 代码与实验室演示窗口 */
    .lab-terminal {
      background: #060709;
      border: 1px solid #1E293B;
      border-radius: 6px;
      overflow: hidden;
      font-family: Consolas, Monaco, "Courier New", Courier, monospace;
      font-size: 13px;
    }

    .terminal-bar {
      background: #11141A;
      padding: 10px 16px;
      border-bottom: 1px solid #1E293B;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .terminal-circle {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .terminal-body {
      padding: 20px;
      color: #94A3B8;
      line-height: 1.8;
      overflow-x: auto;
    }

    .terminal-code-kw { color: #FF7B72; }
    .terminal-code-fn { color: #79C0FF; }
    .terminal-code-str { color: #A5D6FF; }
    .terminal-code-ok { color: var(--clr-accent-emerald); }

    /* 流程时间线组件 */
    .process-step-node {
      border-left: 2px solid #E2E8F0;
      padding-left: 24px;
      position: relative;
      margin-bottom: 30px;
    }

    .process-step-node::before {
      content: "";
      position: absolute;
      left: -7px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: #0F1115;
      border: 2px solid #FFFFFF;
    }

    .process-step-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--clr-slate-text);
      margin-bottom: 6px;
    }

    /* 比对板块 */
    .compare-box {
      border-radius: 6px;
      padding: 28px;
      height: 100%;
    }

    .compare-traditional {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
    }

    .compare-advanced {
      background: rgba(0, 229, 153, 0.04);
      border: 1px solid rgba(0, 229, 153, 0.3);
    }

    /* 手风琴 FAQ */
    .faq-accordion .accordion-item {
      border: none;
      border-bottom: 1px solid var(--clr-border);
      background: transparent;
      border-radius: 0;
    }

    .faq-accordion .accordion-button {
      background: transparent;
      box-shadow: none;
      font-size: 16px;
      font-weight: 600;
      color: var(--clr-slate-text);
      padding: 20px 0;
    }

    .faq-accordion .accordion-button:not(.collapsed) {
      color: #0F1115;
    }

    .faq-accordion .accordion-body {
      padding: 0 0 20px 0;
      font-size: 14.5px;
      color: var(--clr-muted-text);
      line-height: 1.7;
    }

    /* 底部收口与保障条 */
    .guarantee-bar {
      border-top: 1px solid var(--clr-border);
      background: #FFFFFF;
      padding: 28px 0;
    }

    .footer-section {
      background: var(--clr-obsidian);
      color: #94A3B8;
      padding: 60px 0 40px 0;
      border-top: 1px solid var(--clr-border-dark);
      font-size: 13.5px;
    }

    .footer-title {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a:hover {
      color: var(--clr-accent-emerald);
    }

    /* 移动端响应适配 */
    @media (max-width: 991.98px) {
      .app-shell-sidebar {
        display: none;
      }
      .mobile-header {
        display: flex;
      }
      .app-main-content {
        margin-left: 0;
        padding-top: 60px;
      }
      .hero-title-h1 {
        font-size: 30px;
      }
      .section-headline {
        font-size: 26px;
      }
      .content-section {
        padding: 60px 0;
      }
    }