/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-dark: #3730A3;
      --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
      --accent: #10B981;
      --accent-cyan: #06B6D4;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.8);
      --card-radius: 20px;
      --badge-radius: 9999px;
      --box-shadow-card: 0 10px 30px -10px rgba(79, 70, 229, 0.08);
      --box-shadow-hover: 0 20px 35px -10px rgba(79, 70, 229, 0.16);
    }

    * { box-sizing: border-box; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }

    /* Top Meta Bar */
    .top-meta-bar {
      background: #0B1120;
      color: #94A3B8;
      font-size: 0.85rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-meta-bar a:hover { color: #FFFFFF; }

    /* Main Sticky Nav */
    .main-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
      border-bottom: 1px solid var(--border-color);
    }
    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .nav-link {
      font-weight: 600;
      color: var(--text-body) !important;
      padding: 8px 16px !important;
      font-size: 0.95rem;
      border-radius: 8px;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(79, 70, 229, 0.06);
    }

    /* Buttons */
    .btn-gradient {
      background: var(--primary-gradient);
      color: #FFFFFF !important;
      font-weight: 600;
      border-radius: 12px;
      padding: 10px 24px;
      border: none;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.45);
      color: #FFFFFF;
    }
    .btn-outline-custom {
      border: 1px solid #CBD5E1;
      color: var(--text-main);
      background: #FFFFFF;
      font-weight: 600;
      border-radius: 12px;
      padding: 10px 24px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline-custom:hover {
      background: #F1F5F9;
      border-color: #94A3B8;
      color: var(--text-main);
    }

    /* Badges */
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: var(--badge-radius);
      font-size: 0.8rem;
      font-weight: 600;
      font-family: monospace;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      border: 1px solid rgba(79, 70, 229, 0.2);
    }
    .badge-accent {
      background: rgba(16, 185, 129, 0.1);
      color: var(--accent);
      border-color: rgba(16, 185, 129, 0.25);
    }

    /* Bento Cards */
    .bento-card {
      background: var(--bg-card);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--box-shadow-card);
      padding: 32px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      height: 100%;
      position: relative;
    }
    .bento-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--box-shadow-hover);
      border-color: rgba(79, 70, 229, 0.25);
    }

    /* Section Baseline */
    .page-section {
      padding: 85px 0;
      position: relative;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 780px;
      margin-bottom: 48px;
    }

    /* Hero Carousel & Banner */
    .hero-wrapper {
      position: relative;
      background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.94)), url('/assets/images/00a20be3737ccef7.webp');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      padding: 90px 0 60px 0;
    }
    .hero-h1 {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #FFFFFF 30%, #A5B4FC 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 32px;
      max-width: 680px;
    }

    /* Code Snippet Box */
    .console-box {
      background: #020617;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
      overflow: hidden;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.9rem;
    }
    .console-header {
      background: #0F172A;
      padding: 12px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .circle-btn { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
    .console-body {
      padding: 24px;
      color: #38BDF8;
      line-height: 1.6;
    }

    /* Hero Bottom Pill Nav */
    .pill-nav-container {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      position: sticky;
      top: 69px;
      z-index: 1010;
    }
    .pill-scroll-bar {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 0;
      overflow-x: auto;
      scrollbar-width: none;
      white-space: nowrap;
    }
    .pill-scroll-bar::-webkit-scrollbar { display: none; }
    .pill-item {
      padding: 8px 20px;
      border-radius: 9999px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-body);
      background: #F1F5F9;
      border: 1px solid #E2E8F0;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pill-item:hover, .pill-item.active {
      background: var(--primary-gradient);
      color: #FFFFFF;
      border-color: transparent;
      box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
    }

    /* Dark Geek Block */
    .dark-geek-section {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .dark-geek-section .section-title { color: #FFFFFF; }
    .dark-geek-section .section-desc { color: #94A3B8; }
    .dark-geek-section .bento-card {
      background: #1E293B;
      border-color: rgba(255, 255, 255, 0.08);
      color: #E2E8F0;
    }

    /* Step Timeline */
    .step-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: rgba(79, 70, 229, 0.2);
      line-height: 1;
      margin-bottom: 12px;
      font-family: monospace;
    }

    /* Metrics Strip */
    .metrics-strip {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      border-radius: 24px;
      padding: 50px 30px;
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 40px rgba(30, 27, 75, 0.3);
    }
    .metric-value {
      font-size: 3rem;
      font-weight: 800;
      font-family: monospace;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    /* Footer */
    .page-footer {
      background: #090D16;
      color: #94A3B8;
      padding: 70px 0 25px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-title {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 20px;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a:hover { color: #FFFFFF; }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.85rem;
      text-align: center;
    }

    /* Responsive */
    @media (max-width: 991px) {
      .hero-h1 { font-size: 2.4rem; }
      .section-title { font-size: 1.85rem; }
      .page-section { padding: 60px 0; }
    }
    @media (max-width: 767px) {
      .hero-h1 { font-size: 2rem; }
      .hero-wrapper { padding: 60px 0 40px 0; }
      .metric-value { font-size: 2.2rem; }
      .bento-card { padding: 24px; }
    }