:root {
      --primary-color: #EF233C;
      --secondary-color: #2563EB;
      --accent-color: #22D3EE;
      --bg-color: #020617;
      --bg-gradient-end: #07111F;
      --card-bg: #0F172A;
      --card-bg-hover: #1E293B;
      --text-primary: #F8FAFC;
      --text-secondary: #CBD5E1;
      --border-color: rgba(148, 163, 184, 0.18);
      --highlight-color: #FBBF24;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { width: 100%; overflow-x: hidden; }
    body {
      width: 100%; margin: 0; overflow-x: hidden;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background-color: var(--bg-color);
      background-image: radial-gradient(circle at 50% 0%, var(--bg-gradient-end) 0%, var(--bg-color) 70%);
      color: var(--text-primary); line-height: 1.5;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--text-primary); text-decoration: none; transition: all 0.25s ease; }

    
    .site-header {
      position: sticky; top: 0; z-index: 1000; width: 100%;
      background: rgba(5, 11, 24, 0.90); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      width: min(1200px, calc(100% - 32px)); min-height: 72px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; gap: 18px;
    }
    .logo { display: inline-flex; align-items: center; gap: 12px; min-width: 0; max-width: 100%; text-decoration: none; flex-shrink: 0; }
    .logo img { display: block; height: 40px; width: auto; max-width: 150px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 18px; font-weight: 800; line-height: 1.2; color: #F8FAFC; white-space: nowrap; max-width: 180px; overflow: hidden; text-overflow: ellipsis; }
    
    .desktop-nav-wrap { flex: 1 1 auto; min-width: 0; display: flex; justify-content: flex-end; overflow: hidden; }
    .desktop-nav { display: flex; align-items: center; justify-content: flex-end; gap: 8px; max-width: 100%; overflow-x: auto; overflow-y: hidden; -webkit-overflow-scrolling: touch; scrollbar-width: none; white-space: nowrap; }
    .desktop-nav::-webkit-scrollbar { display: none; }
    .desktop-nav a { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 13px; border-radius: 999px; color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 700; line-height: 1; white-space: nowrap; flex: 0 0 auto; }
    .desktop-nav a:hover { color: #F8FAFC; background: rgba(239, 35, 60, 0.18); }
    
    .mobile-menu-btn { display: none; width: 44px; height: 44px; border: 0; border-radius: 14px; background: rgba(148, 163, 184, 0.14); align-items: center; justify-content: center; flex-direction: column; gap: 5px; cursor: pointer; flex: 0 0 auto; }
    .mobile-menu-btn span { display: block; width: 20px; height: 2px; border-radius: 99px; background: #F8FAFC; }

    
    .mobile-nav-mask { position: fixed; inset: 0; z-index: 1100; background: rgba(15, 23, 42, 0.56); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .25s ease, visibility .25s ease; }
    .mobile-drawer { position: fixed; top: 0; left: 0; z-index: 1110; width: min(86vw, 360px); height: 100vh; height: 100dvh; max-width: 90vw; background: #07111F; color: #F8FAFC; transform: translateX(-105%); transition: transform .28s ease; box-shadow: 24px 0 60px rgba(0,0,0,.42); display: flex; flex-direction: column; overflow: hidden; }
    .drawer-head { min-height: 76px; padding: 16px 16px 14px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--border-color); flex: 0 0 auto; }
    .drawer-logo { min-width: 0; }
    .drawer-logo img { height: 34px; max-width: 120px; }
    .drawer-logo span { font-size: 16px; max-width: 145px; }
    .drawer-close { width: 40px; height: 40px; border: 0; border-radius: 14px; background: rgba(148, 163, 184, 0.14); color: #F8FAFC; font-size: 26px; line-height: 1; cursor: pointer; flex: 0 0 auto; }
    .drawer-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; padding: 14px; }
    .drawer-nav { display: flex; flex-direction: column; gap: 8px; }
    .drawer-nav a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 13px 14px; border-radius: 14px; background: rgba(148, 163, 184, .10); color: #F8FAFC; text-decoration: none; font-size: 15px; font-weight: 700; line-height: 1.35; white-space: normal; word-break: break-word; overflow-wrap: anywhere; border: 1px solid rgba(148,163,184,.14); }
    .drawer-nav a:hover { background: rgba(239, 35, 60, 0.16); color: #ffffff; }
    body.drawer-open { overflow: hidden; touch-action: none; }
    body.drawer-open .mobile-nav-mask { opacity: 1; visibility: visible; pointer-events: auto; }
    body.drawer-open .mobile-drawer { transform: translateX(0); }

    
    .download-container {
      width: min(1200px, calc(100% - 32px)); margin: 56px auto 80px;
    }
    .dl-header { text-align: center; margin-bottom: 56px; }
    .dl-header h1 { font-size: 36px; font-weight: 900; margin: 0 0 12px; }
    .dl-header p { font-size: 16px; color: var(--text-secondary); max-width: 700px; margin: 0 auto; }
    
    .dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; margin-bottom: 56px; }
    .dl-card {
      background: rgba(15, 23, 42, 0.8); border: 1px solid var(--border-color); border-radius: 20px;
      padding: 32px; display: flex; flex-direction: column;
    }
    .dl-icon { font-size: 32px; margin-bottom: 16px; }
    .dl-title { font-size: 20px; font-weight: 800; margin: 0 0 8px; }
    .dl-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin: 0 0 24px; flex-grow: 1; }
    .btn-dl {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 48px; border-radius: 10px; font-weight: 700; font-size: 14px;
      background: var(--secondary-color); color: #FFF; text-transform: uppercase;
      letter-spacing: 0.05em; transition: all 0.2s ease;
    }
    .btn-dl:hover { background: var(--primary-color); transform: translateY(-2px); }

    .setup-guide-box {
      background: rgba(7, 17, 31, 0.6); border: 1px solid var(--border-color);
      border-radius: 20px; padding: 40px;
    }
    .setup-guide-box h2 { font-size: 24px; font-weight: 800; margin: 0 0 20px; color: var(--accent-color); }
    .setup-steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 20px; }
    .setup-steps li { display: flex; gap: 16px; font-size: 15px; color: var(--text-secondary); line-height: 1.6; }
    .step-num {
      flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%;
      background: var(--primary-color); color: #FFF; font-weight: 800;
      display: flex; align-items: center; justify-content: center; font-size: 14px;
    }

    
    .site-footer {
      position: relative; z-index: 1; width: 100%; background: #020617; color: #E5E7EB; padding: 56px 0 24px; overflow: hidden; border-top: 1px solid var(--border-color);
    }
    .footer-inner {
      width: min(1200px, calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: minmax(260px,1.35fr) repeat(3, minmax(150px,1fr)); gap: 28px; align-items: start;
    }
    .footer-brand { min-width: 0; }
    .footer-brand p { margin: 16px 0 0; color: rgba(226,232,240,.78); line-height: 1.8; font-size: 14px; word-break: break-word; overflow-wrap: anywhere; }
    .footer-logo span { color: #ffffff; }
    .footer-column { min-width: 0; }
    .footer-column h3 { margin: 0 0 14px; font-size: 15px; color: #ffffff; }
    .footer-column ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
    .footer-column li { min-width: 0; }
    .footer-column a, .footer-column span { display: inline; color: rgba(226,232,240,.78); text-decoration: none; font-size: 14px; line-height: 1.55; white-space: normal; word-break: break-word; overflow-wrap: anywhere; }
    .footer-column a:hover { color: #ffffff; }
    .footer-bottom {
      width: min(1200px, calc(100% - 32px)); margin: 32px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); display: flex; align-items: center; justify-content: space-between; gap: 16px; color: rgba(226,232,240,.62); font-size: 13px;
    }
    .footer-bottom p { margin: 0; min-width: 0; word-break: break-word; overflow-wrap: anywhere; }
    .footer-bottom a { color: rgba(226,232,240,.78); text-decoration: none; word-break: break-word; overflow-wrap: anywhere; }

    @media (max-width: 900px) {
      .header-inner { width: min(100% - 24px, 1200px); min-height: 64px; gap: 12px; }
      .desktop-nav-wrap, .desktop-nav { display: none !important; }
      .mobile-menu-btn { display: inline-flex !important; }
      .logo img { height: 34px; max-width: 118px; }
      .logo span { font-size: 16px; max-width: 145px; }
      .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; }
      .footer-brand { grid-column: 1 / -1; }
      .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
    }
    @media (max-width: 640px) {
      .footer-inner { grid-template-columns: 1fr; }
    }
    @media (max-width: 420px) {
      .mobile-drawer { width: 88vw; }
      .logo span { max-width: 112px; }
      .drawer-logo span { max-width: 118px; }
      .footer-inner, .footer-bottom { width: min(100% - 24px, 1200px); }
    }