/* roulang page: index */
:root {
      --bg-base: #0B0E14;
      --bg-surface: #141923;
      --bg-subtle: #1C2331;
      --brand-primary: #00E599;
      --brand-accent: #FF3B30;
      --brand-cyan: #00B4D8;
      --text-primary: #F8FAFC;
      --text-secondary: #94A3B8;
      --text-muted: #64748B;
      --border-color: rgba(255, 255, 255, 0.08);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Lantinghei SC", "Microsoft YaHei", sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; background-color: var(--bg-base); }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-base);
      color: var(--text-primary);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    a:hover { color: var(--brand-primary); }
    img { max-width: 100%; height: auto; display: block; }
    ul { list-style: none; margin: 0; }

    /* 容器修正与排版 */
    .g-container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
    .section-wrap { padding: 5.5rem 0; position: relative; border-bottom: 1px solid var(--border-color); }
    .section-wrap.alt-bg { background-color: var(--bg-surface); }
    
    .sec-header { margin-bottom: 3rem; }
    .sec-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--brand-primary);
      padding: 0.25rem 0.75rem;
      background: rgba(0, 229, 153, 0.08);
      border: 1px solid rgba(0, 229, 153, 0.25);
      border-radius: 2px;
      margin-bottom: 0.85rem;
    }
    .sec-tag::before { content: ""; display: inline-block; width: 6px; height: 6px; background: var(--brand-primary); border-radius: 50%; }
    .sec-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 0.85rem;
    }
    .sec-desc {
      font-size: 0.95rem;
      color: var(--text-secondary);
      max-width: 760px;
      line-height: 1.7;
    }

    /* 按钮组件 */
    .btn-main, .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: 2px;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-main {
      background: var(--brand-primary);
      color: #051a11;
      border: 1px solid var(--brand-primary);
    }
    .btn-main:hover {
      background: #00c784;
      box-shadow: 0 0 20px rgba(0, 229, 153, 0.35);
      color: #051a11;
    }
    .btn-ghost {
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-primary);
      border: 1px solid var(--border-color);
    }
    .btn-ghost:hover {
      border-color: var(--brand-primary);
      color: var(--brand-primary);
      background: rgba(0, 229, 153, 0.05);
    }

    /* 卡片体系 */
    .sys-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 4px;
      padding: 1.75rem;
      position: relative;
      transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
    }
    .sys-card:hover {
      border-color: var(--brand-primary);
      box-shadow: 0 0 20px rgba(0, 229, 153, 0.12);
      transform: translateY(-2px);
    }

    /* 导航栏体系 */
    .top-telemetry-bar {
      background: #06080B;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.75rem;
      color: var(--text-muted);
      padding: 0.4rem 0;
    }
    .telemetry-flex { display: flex; justify-content: space-between; align-items: center; }
    .status-pulse { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--brand-primary); }
    .status-pulse-dot { width: 7px; height: 7px; background: var(--brand-primary); border-radius: 50%; box-shadow: 0 0 8px var(--brand-primary); }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 14, 20, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.01em;
    }
    .brand-logo-badge {
      background: var(--brand-primary);
      color: #07150e;
      font-size: 0.7rem;
      font-weight: 800;
      padding: 0.15rem 0.45rem;
      border-radius: 2px;
      line-height: 1;
    }
    .nav-actions { display: flex; align-items: center; gap: 1.25rem; }
    .hamburger-btn {
      background: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-primary);
      padding: 0.55rem 0.85rem;
      border-radius: 2px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.85rem;
    }
    .hamburger-btn:hover { border-color: var(--brand-primary); color: var(--brand-primary); }

    /* 全屏侧滑抽屉 */
    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(8px);
      z-index: 2000;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .drawer-panel {
      position: fixed;
      top: 0;
      right: 0;
      width: 100%;
      max-width: 420px;
      height: 100%;
      background: var(--bg-surface);
      border-left: 1px solid var(--border-color);
      z-index: 2001;
      transform: translateX(100%);
      transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      display: flex;
      flex-direction: column;
      padding: 2.5rem;
      overflow-y: auto;
    }
    .drawer-active .drawer-overlay { opacity: 1; pointer-events: auto; }
    .drawer-active .drawer-panel { transform: translateX(0); }
    .drawer-close {
      align-self: flex-end;
      background: transparent;
      border: none;
      color: var(--text-muted);
      font-size: 1.5rem;
      cursor: pointer;
      line-height: 1;
      padding: 0.5rem;
    }
    .drawer-close:hover { color: var(--brand-accent); }
    .drawer-nav-list { margin: 2rem 0; display: flex; flex-direction: column; gap: 1.25rem; }
    .drawer-link {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--text-primary);
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      padding-bottom: 0.75rem;
    }
    .drawer-link:hover { color: var(--brand-primary); transform: translateX(4px); }
    .drawer-telemetry-box {
      margin-top: auto;
      padding: 1.25rem;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      border-radius: 3px;
      font-size: 0.8rem;
      color: var(--text-secondary);
    }

    /* 板块 1: Hero Section */
    .hero-banner-sec {
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.08) 0%, transparent 60%),
                  linear-gradient(180deg, var(--bg-base) 0%, #0F131C 100%);
      padding: 5rem 0 5.5rem;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin-bottom: 1.25rem;
      color: var(--text-primary);
    }
    .hero-h1 span { color: var(--brand-primary); }
    .hero-lead {
      font-size: 1rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 2rem;
      max-width: 620px;
    }
    .hero-milestone-bar {
      background: rgba(28, 35, 49, 0.7);
      border: 1px solid var(--border-color);
      border-left: 3px solid var(--brand-primary);
      padding: 0.85rem 1.25rem;
      margin-bottom: 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.825rem;
    }
    .hero-console {
      background: #06090e;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    }
    .console-bar {
      background: #111622;
      padding: 0.6rem 1rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .console-dots { display: flex; gap: 6px; }
    .console-dots span { width: 8px; height: 8px; border-radius: 50%; background: #2A3245; }
    .console-body { padding: 1.25rem; }
    .stream-log { font-family: monospace; font-size: 0.75rem; line-height: 1.8; color: var(--text-secondary); }
    .stream-log .ok { color: var(--brand-primary); }
    .stream-log .warn { color: var(--brand-accent); }
    .stream-log .info { color: var(--brand-cyan); }

    /* 板块 2: 指标看板 */
    .metric-num {
      font-size: 2.5rem;
      font-weight: 800;
      font-feature-settings: "tnum";
      line-height: 1;
      margin-bottom: 0.5rem;
    }
    .metric-num.green { color: var(--brand-primary); }
    .metric-num.cyan { color: var(--brand-cyan); }
    .metric-num.red { color: var(--brand-accent); }
    .metric-label { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

    /* 架构决策流板块图 */
    .flow-step-box {
      border: 1px solid var(--border-color);
      background: var(--bg-surface);
      padding: 1.5rem;
      position: relative;
    }
    .flow-badge {
      font-size: 0.7rem;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      padding: 0.2rem 0.5rem;
      color: var(--brand-cyan);
      display: inline-block;
      margin-bottom: 0.75rem;
    }

    /* 对抗场景网格 */
    .scene-grid-icon {
      font-size: 1.5rem;
      color: var(--brand-primary);
      margin-bottom: 1rem;
    }

    /* 审计控制台 Case */
    .terminal-audit {
      background: #04070B;
      border: 1px solid var(--border-color);
      padding: 1.5rem;
      font-family: monospace;
      font-size: 0.8rem;
      color: #94A3B8;
      border-radius: 3px;
    }

    /* 证言卡 */
    .quote-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 2rem;
      position: relative;
    }
    .quote-author { display: flex; align-items: center; gap: 1rem; margin-top: 1.5rem; }
    .author-avatar-stub {
      width: 44px;
      height: 44px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--brand-primary);
    }

    /* 表单组件 */
    .form-control-custom {
      width: 100%;
      background: #0A0D14;
      border: 1px solid var(--border-color);
      color: var(--text-primary);
      padding: 0.8rem 1rem;
      font-size: 0.875rem;
      border-radius: 2px;
      margin-bottom: 1rem;
    }
    .form-control-custom:focus {
      outline: none;
      border-color: var(--brand-primary);
      background: #0e131d;
    }

    /* 折叠 FAQ */
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      margin-bottom: 0.75rem;
      border-radius: 2px;
    }
    .faq-trigger {
      padding: 1.25rem 1.5rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
    }
    .faq-trigger:hover { color: var(--brand-primary); }
    .faq-body {
      padding: 0 1.5rem 1.25rem;
      color: var(--text-secondary);
      font-size: 0.9rem;
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #06080D;
      border-top: 1px solid var(--border-color);
      padding: 4.5rem 0 2rem;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 0.95rem;
      color: var(--text-primary);
      font-weight: 700;
      margin-bottom: 1.25rem;
      letter-spacing: -0.01em;
    }
    .footer-links li { margin-bottom: 0.65rem; }
    .footer-bottom-bar {
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
    }

    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.25rem; }
      .sec-title { font-size: 1.85rem; }
    }
    @media (max-width: 768px) {
      .section-wrap { padding: 4rem 0; }
      .hero-h1 { font-size: 1.95rem; }
      .top-telemetry-bar { display: none; }
      .footer-bottom-bar { flex-direction: column; align-items: flex-start; }
    }