/* roulang page: index */
:root {
      --primary-dark: #0B2B1A;
      --primary-forest: #0E3D24;
      --primary-pitch: #111613;
      --accent-neon: #00E676;
      --accent-emerald: #10B981;
      --accent-gold: #FACC15;
      --bg-light: #F4F7F5;
      --bg-white: #FFFFFF;
      --bg-dark-card: #17231C;
      --text-main: #1A201C;
      --text-muted: #5A6E63;
      --text-light: #E2ECE6;
      --border-light: rgba(0, 0, 0, 0.08);
      --border-dark: rgba(255, 255, 255, 0.12);
      --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
      --shadow-deep: 0 16px 40px rgba(0, 0, 0, 0.22);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

    /* Reset & Base */
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      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(--accent-neon); }
    img { max-width: 100%; height: auto; display: block; }
    ul { list-style: none; margin: 0; padding: 0; }

    /* Layout & Containers */
    .section-wrap { padding: 84px 0; position: relative; }
    .section-wrap-dark { background-color: var(--primary-pitch); color: #FFF; }
    .section-wrap-white { background-color: var(--bg-white); }
    .section-wrap-forest { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-forest) 100%); color: #FFF; }
    
    .section-header { text-align: center; max-width: 780px; margin: 0 auto 52px; }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 14px;
      border-radius: 30px;
      background: rgba(0, 230, 118, 0.12);
      color: var(--accent-emerald);
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-wrap-dark .section-tag, .section-wrap-forest .section-tag {
      background: rgba(0, 230, 118, 0.2);
      color: var(--accent-neon);
    }
    .section-title { font-size: 32px; font-weight: 800; line-height: 1.35; margin-bottom: 14px; }
    .section-desc { font-size: 16px; color: var(--text-muted); line-height: 1.65; }
    .section-wrap-dark .section-desc, .section-wrap-forest .section-desc { color: rgba(226, 236, 230, 0.82); }

    /* Dual-Tier Header & Sticky Navigation */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      background: var(--primary-pitch);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .header-top-row {
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
      color: #A0B2A6;
      transition: height 0.3s ease, opacity 0.3s ease;
    }
    .header-bottom-row { padding: 14px 0; transition: padding 0.3s ease; }
    
    .brand-logo {
      display: flex;
      align-items: center;
      font-size: 22px;
      font-weight: 800;
      color: #FFF;
      letter-spacing: 0.5px;
    }
    .brand-logo i { color: var(--accent-neon); margin-right: 10px; font-size: 24px; }
    .live-indicator {
      display: inline-flex;
      align-items: center;
      padding: 3px 10px;
      background: rgba(239, 68, 68, 0.18);
      border: 1px solid rgba(239, 68, 68, 0.4);
      color: #EF4444;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      margin-left: 14px;
    }
    .live-dot {
      width: 7px;
      height: 7px;
      background-color: #EF4444;
      border-radius: 50%;
      margin-right: 6px;
      animation: pulseDot 1.4s infinite;
    }
    @keyframes pulseDot { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(1.3); } }

    .nav-menu { display: flex; align-items: center; gap: 28px; }
    .nav-item { font-size: 15px; font-weight: 600; color: #D1DFD6; position: relative; padding: 6px 0; }
    .nav-item.active, .nav-item:hover { color: var(--accent-neon); }
    .nav-item.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-neon);
      border-radius: 2px;
    }

    .btn-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 700;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
    }
    .btn-neon { background-color: var(--accent-neon); color: var(--primary-pitch); }
    .btn-neon:hover { background-color: #05f07d; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 230, 118, 0.35); color: var(--primary-pitch); }
    .btn-outline-light { border: 1px solid rgba(255, 255, 255, 0.24); color: #FFF; background: transparent; }
    .btn-outline-light:hover { background: rgba(255, 255, 255, 0.08); border-color: #FFF; color: #FFF; transform: translateY(-2px); }

    /* Sticky Collapsed State */
    .site-header.is-scrolled {
      background: rgba(17, 22, 19, 0.94);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    .site-header.is-scrolled .header-top-row { display: none; }
    .site-header.is-scrolled .header-bottom-row { padding: 10px 0; }

    /* Mobile Nav Toggle */
    .mobile-menu-btn { display: none; background: transparent; border: none; color: #FFF; font-size: 22px; cursor: pointer; }

    /* Section 1: Hero Banner (Brand Stage) */
    .hero-section {
      padding-top: 170px;
      padding-bottom: 90px;
      background: radial-gradient(circle at 80% 20%, rgba(14, 61, 36, 0.6) 0%, rgba(17, 22, 19, 0.98) 70%), url('data:image/svg+xml;utf8,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><g fill="%230E3D24" fill-opacity="0.12" fill-rule="evenodd"><path d="M0 40L40 0H20L0 20M40 40V20L20 40"/></g></svg>');
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .hero-h1 { font-size: 42px; font-weight: 800; line-height: 1.25; color: #FFF; margin-bottom: 20px; }
    .hero-h1 span { color: var(--accent-neon); }
    .hero-intro { font-size: 16px; color: #B9CEC1; line-height: 1.8; margin-bottom: 32px; max-width: 620px; }
    .hero-metrics { display: flex; gap: 32px; margin-top: 36px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, 0.1); }
    .metric-item .val { font-size: 26px; font-weight: 800; color: #FFF; }
    .metric-item .val i { font-size: 14px; color: var(--accent-neon); margin-left: 2px; }
    .metric-item .lbl { font-size: 13px; color: #8FA697; }

    .hero-stream-console {
      background: var(--bg-dark-card);
      border: 1px solid rgba(0, 230, 118, 0.25);
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--shadow-deep);
      position: relative;
    }
    .console-screen {
      background: #000;
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
      aspect-ratio: 16/9;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 16px;
    }
    .screen-overlay-top { display: flex; justify-content: space-between; align-items: center; }
    .match-badge { background: rgba(0,0,0,0.65); padding: 4px 10px; border-radius: 4px; font-size: 12px; font-weight: 700; color: #FFF; }
    .score-board {
      align-self: center;
      background: rgba(11, 43, 26, 0.85);
      backdrop-filter: blur(8px);
      padding: 14px 28px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(0, 230, 118, 0.3);
      display: flex;
      align-items: center;
      gap: 20px;
      text-align: center;
    }
    .score-board .team { font-size: 16px; font-weight: 700; color: #FFF; }
    .score-board .score { font-size: 28px; font-weight: 900; color: var(--accent-gold); letter-spacing: 2px; }
    .screen-overlay-bottom { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: #C2D6CA; }

    /* Section 2: Function Matrix Cards */
    .feature-card {
      background: #FFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
      height: 100%;
    }
    .feature-card:hover { transform: translateY(-5px); box-shadow: 0 16px 36px rgba(11, 43, 26, 0.09); border-color: var(--accent-emerald); }
    .feature-icon-box {
      width: 54px;
      height: 54px;
      border-radius: var(--radius-sm);
      background: rgba(0, 230, 118, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--primary-forest);
      margin-bottom: 20px;
    }
    .feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--text-main); }
    .feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin: 0; }

    /* Section 3: Use Cases Grid */
    .scenario-card {
      background: #FFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .scenario-body { padding: 28px; flex: 1; }
    .scenario-meta { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: 12px; font-weight: 700; color: var(--accent-emerald); }
    .scenario-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
    .scenario-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
    .scenario-footer { padding: 14px 28px; background: #F8FAF9; border-top: 1px solid var(--border-light); font-size: 13px; color: #64748B; }

    /* Section 4: Player Console Mockup */
    .console-showcase-box {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-deep);
    }
    .console-nav-strip {
      display: flex;
      gap: 12px;
      padding-bottom: 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      margin-bottom: 20px;
    }
    .console-tab { font-size: 13px; padding: 6px 14px; border-radius: 4px; background: rgba(255, 255, 255, 0.05); color: #B3C8BC; cursor: pointer; }
    .console-tab.active { background: var(--primary-forest); color: var(--accent-neon); font-weight: 700; }
    .console-view-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
    .main-view-sim { background: #050806; border-radius: var(--radius-md); padding: 20px; min-height: 280px; display: flex; flex-direction: column; justify-content: space-between; }
    .side-data-panel { background: rgba(255,255,255,0.02); border-radius: var(--radius-md); padding: 16px; border: 1px solid rgba(255, 255, 255, 0.05); }
    .data-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); font-size: 13px; }

    /* Section 5: Matches & Key Games */
    .match-case-card {
      background: #FFF;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }
    .match-case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
    .match-case-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
    .match-case-title { font-size: 17px; font-weight: 700; }
    .stream-stat-badge { font-size: 12px; background: #E8F5E9; color: #2E7D32; padding: 3px 8px; border-radius: 4px; font-weight: 600; }

    /* Section 6: Plan & Pricing */
    .price-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
      transition: all 0.3s ease;
    }
    .price-card.popular {
      border: 2px solid var(--accent-emerald);
      box-shadow: 0 16px 36px rgba(16, 185, 129, 0.12);
    }
    .popular-tag {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--accent-emerald);
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 20px;
    }
    .price-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
    .price-amount { font-size: 36px; font-weight: 900; color: var(--primary-pitch); margin: 16px 0; }
    .price-amount span { font-size: 15px; font-weight: 500; color: #64748B; }
    .price-features { margin: 24px 0; flex: 1; }
    .price-features li { font-size: 14px; color: #475569; margin-bottom: 12px; display: flex; align-items: center; }
    .price-features li i { color: var(--accent-emerald); margin-right: 10px; font-size: 13px; }

    /* Section 7 & 8: Testimonials & Community */
    .quote-card {
      background: #FFF;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      height: 100%;
    }
    .quote-stars { color: var(--accent-gold); margin-bottom: 12px; font-size: 13px; }
    .quote-text { font-size: 14px; color: #334155; line-height: 1.65; margin-bottom: 16px; }
    .quote-author { display: flex; align-items: center; gap: 12px; }
    .avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-forest);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    /* Section 9: Articles / Match Previews */
    .article-lead-card {
      background: #FFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      height: 100%;
    }
    .article-lead-img {
      background: linear-gradient(135deg, var(--primary-dark), #1F4D36);
      height: 200px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(255,255,255,0.7);
      font-size: 48px;
    }
    .article-lead-body { padding: 24px; }
    .article-list-item {
      background: #FFF;
      border-radius: var(--radius-md);
      padding: 16px 20px;
      border: 1px solid var(--border-light);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.25s ease;
    }
    .article-list-item:hover { border-color: var(--accent-emerald); transform: translateX(4px); }

    /* Section 10: GEO Network Nodes */
    .node-box {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 22px;
      text-align: center;
    }
    .node-box i { font-size: 28px; color: var(--accent-neon); margin-bottom: 12px; }
    .node-box h4 { font-size: 16px; font-weight: 700; color: #FFF; margin-bottom: 6px; }
    .node-box p { font-size: 13px; color: #A0B3A7; margin: 0; }

    /* Section 11: Accordion FAQ */
    .faq-card {
      background: #FFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 20px 24px;
      margin-bottom: 16px;
      box-shadow: var(--shadow-soft);
    }
    .faq-question { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; display: flex; align-items: center; }
    .faq-question i { color: var(--accent-emerald); margin-right: 10px; }
    .faq-answer { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin: 0; padding-left: 24px; }

    /* Section 12: Final CTA Banner */
    .cta-banner {
      background: radial-gradient(circle at 50% 50%, #16482C 0%, var(--primary-pitch) 100%);
      border: 1px solid rgba(0, 230, 118, 0.3);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      text-align: center;
      box-shadow: var(--shadow-deep);
    }
    .cta-banner h2 { font-size: 32px; font-weight: 800; color: #FFF; margin-bottom: 16px; }
    .cta-banner p { font-size: 16px; color: #C2D6CB; max-width: 650px; margin: 0 auto 30px; }

    /* Site Footer */
    .site-footer {
      background: #0B0E0C;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      color: #8C9F93;
      padding: 56px 0 28px;
      font-size: 13px;
    }
    .footer-brand { font-size: 20px; font-weight: 800; color: #FFF; margin-bottom: 14px; display: flex; align-items: center; }
    .footer-brand i { color: var(--accent-neon); margin-right: 8px; }
    .footer-desc { line-height: 1.7; max-width: 380px; margin-bottom: 20px; }
    .footer-heading { font-size: 14px; font-weight: 700; color: #FFF; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a:hover { color: var(--accent-neon); }
    .footer-bottom {
      margin-top: 40px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      text-align: center;
      color: #5E7266;
    }

    /* Responsive */
    @media (max-width: 1023px) {
      .header-top-row { display: none; }
      .nav-menu { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-section { padding-top: 130px; text-align: center; }
      .hero-intro { margin-left: auto; margin-right: auto; }
      .hero-metrics { justify-content: center; }
      .console-view-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 639px) {
      .section-wrap { padding: 56px 0; }
      .hero-h1 { font-size: 30px; }
      .section-title { font-size: 24px; }
      .score-board { padding: 10px 14px; gap: 10px; }
      .score-board .score { font-size: 20px; }
      .score-board .team { font-size: 13px; }
    }