:root {
      --bg: #050510;
      --bg-card: #0a0a1a;
      --text: #f4f4f5;
      --muted: #71717a;
      --cyan: #22d3ee;
      --green: #22c55e;
      --grad: linear-gradient(120deg, #6366f1 0%, #ec4899 52%, #f59e0b 100%);
      --border: #1e1e2e;
      --max: 1100px;
      --radius: 16px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      font-family: var(--font);
      background: var(--bg);
      line-height: 1.6;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    .container { width: min(var(--max), 92vw); margin: 0 auto; }
    .section { padding: 112px 0; }

    .gradient-text {
      background: var(--grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .glow {
      box-shadow: 0 0 60px rgba(34, 211, 238, 0.15);
      border: 1px solid rgba(34, 211, 238, 0.1);
    }

    .screenshot {
      border-radius: 16px;
      border: 1px solid var(--border);
      box-shadow: 0 0 80px rgba(99, 102, 241, 0.1), 0 0 40px rgba(236, 72, 153, 0.05);
      overflow: hidden;
      background: #090914;
      aspect-ratio: 16 / 9;
    }

    .screenshot img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center;
    }

    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    .site-header {
      position: fixed;
      inset: 0 0 auto 0;
      z-index: 50;
      background: rgba(5, 5, 16, 0.56);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: background 0.25s ease, border-color 0.25s ease;
    }
    .site-header.scrolled {
      background: rgba(5, 5, 16, 0.92);
      border-bottom-color: var(--border);
    }
    .nav-wrap {
      min-height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .logo {
      font-weight: 700;
      letter-spacing: 0.4px;
      font-size: 1.05rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      color: #a1a1aa;
      font-weight: 500;
    }
    .nav-links a:hover { color: #d4d4d8; }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .search-link {
      font-size: 0.98rem;
      color: #a1a1aa;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 22px;
      border-radius: 10px;
      font-weight: 700;
      border: 1px solid transparent;
      transition: transform 0.2s ease, opacity 0.2s ease;
      white-space: nowrap;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      background: var(--grad);
      color: #f4f4f5;
      box-shadow: 0 8px 30px rgba(99, 102, 241, 0.28);
    }
    .btn-outline {
      border-color: rgba(244, 244, 245, 0.24);
      background: transparent;
      color: #f4f4f5;
    }
    .header-cta { padding: 10px 16px; font-size: 0.94rem; }

    .menu-btn {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: #090914;
      color: var(--text);
      font-size: 1.2rem;
      cursor: pointer;
    }

    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      padding: 120px 0 56px;
      background: radial-gradient(ellipse 800px 400px at 50% 0%, rgba(99, 102, 241, 0.15), transparent 70%), #050510;
    }
    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero h1 {
      margin: 0;
      font-size: clamp(2.7rem, 7.4vw, 4.6rem);
      line-height: 1.08;
      letter-spacing: -0.03em;
      font-weight: 700;
    }
    .hero p {
      margin: 24px auto 0;
      max-width: 740px;
      font-size: clamp(1.08rem, 2.2vw, 1.3rem);
      color: var(--muted);
    }
    .hero-actions {
      margin-top: 34px;
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }
    .hero-note {
      margin-top: 24px;
      color: #a1a1aa;
      font-size: 0.95rem;
    }
    .scroll-cue {
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: 20px;
      color: #a1a1aa;
      font-size: 1.35rem;
      animation: floatArrow 1.8s ease-in-out infinite;
    }
    @keyframes floatArrow {
      0%, 100% { transform: translate(-50%, 0); opacity: 0.55; }
      50% { transform: translate(-50%, 8px); opacity: 1; }
    }

    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .stat {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
    }
    .stat strong {
      display: block;
      font-size: clamp(1.7rem, 3.2vw, 2.3rem);
      line-height: 1.1;
      margin-bottom: 8px;
      font-weight: 700;
    }
    .stat span { color: var(--muted); font-size: 1rem; }

    h2 {
      margin: 0;
      font-size: clamp(2rem, 5.2vw, 3.25rem);
      line-height: 1.15;
      letter-spacing: -0.02em;
      font-weight: 700;
    }
    .section-lead {
      margin: 14px 0 0;
      color: var(--muted);
      font-size: clamp(1rem, 2vw, 1.15rem);
    }

    .showcase {
      display: grid;
      grid-template-columns: 1.25fr 1fr;
      gap: 34px;
      align-items: center;
      margin-top: 34px;
    }
    .showcase-copy ul {
      margin: 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 14px;
      color: #d4d4d8;
      font-size: 1.06rem;
    }
    .showcase-copy li {
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: rgba(10, 10, 26, 0.7);
    }

    .proof-wrap {
      display: grid;
      grid-template-columns: 1.3fr 1fr;
      gap: 28px;
      align-items: start;
      margin-top: 34px;
    }
    .quotes {
      display: grid;
      gap: 12px;
    }
    .quote-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 16px;
      color: #d4d4d8;
    }
    .quote-name {
      margin-top: 8px;
      color: var(--muted);
      font-size: 0.92rem;
    }

    .guide-box {
      margin-top: 30px;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: var(--bg-card);
      padding: 20px;
    }
    .chapter-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px 12px;
    }
    .chapter-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 10px;
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 10px;
      color: #e4e4e7;
      background: #090914;
      font-size: 0.95rem;
    }
    .tag {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      padding: 2px 10px;
      font-size: 0.78rem;
      border: 1px solid transparent;
      flex: 0 0 auto;
    }
    .tag.free {
      color: var(--cyan);
      border-color: rgba(34, 211, 238, 0.4);
      background: rgba(34, 211, 238, 0.1);
    }
    .tag.lock {
      color: #f4f4f5;
      background: var(--grad);
      border: none;
    }

    .cta {
      text-align: center;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 56px 24px;
      background: radial-gradient(ellipse 600px 240px at 50% 0%, rgba(99, 102, 241, 0.18), transparent 70%), var(--bg-card);
    }
    .cta p {
      margin: 14px auto 24px;
      color: var(--muted);
      font-size: clamp(1rem, 2vw, 1.22rem);
      max-width: 640px;
    }
    .price-note {
      margin-top: 14px;
      color: #a1a1aa;
      font-size: 0.95rem;
    }

    .countdown {
      margin-top: 12px;
      color: #e4e4e7;
      font-size: 1.02rem;
      letter-spacing: 0.02em;
      font-weight: 700;
    }

    footer {
      border-top: 1px solid var(--border);
      padding: 44px 0;
      background: #050510;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 20px;
    }
    .footer-title {
      color: #e4e4e7;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .footer-text,
    .footer-link {
      color: var(--muted);
      font-size: 0.95rem;
    }
    .footer-links {
      display: grid;
      gap: 8px;
    }
    .qrcode {
      width: 92px;
      height: 92px;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 4px;
      margin-top: 10px;
      background: #090914;
    }

    @media (max-width: 980px) {
      .showcase,
      .proof-wrap,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .stats-row { grid-template-columns: repeat(2, 1fr); }
      .section { padding: 92px 0; }
    }

    @media (max-width: 760px) {
      .menu-btn { display: inline-grid; place-items: center; }
      .header-cta { display: none; }
      .nav-links {
        position: absolute;
        top: 74px;
        left: 4vw;
        right: 4vw;
        border: 1px solid var(--border);
        border-radius: 14px;
        background: rgba(10, 10, 26, 0.98);
        padding: 14px;
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
      .nav-links.open { display: flex; }
      .hero { padding-top: 106px; }
      .hero h1 { font-size: clamp(2.2rem, 11vw, 3.2rem); }
      .hero p { font-size: 1.04rem; }
      .chapter-grid,
      .stats-row {
        grid-template-columns: 1fr;
      }
      .section { padding: 76px 0; }
    }
  
    .lang-switcher {
      position: relative;
      display: inline-flex;
      align-items: center;
    }
    .lang-switcher-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: transparent;
      border: 0;
      color: #a1a1aa;
      font-size: 14px;
      line-height: 1;
      cursor: pointer;
      padding: 6px 2px;
      transition: color 0.2s ease;
      font-family: inherit;
    }
    .lang-switcher-btn:hover,
    .lang-switcher-btn[aria-expanded="true"] {
      color: #f4f4f5;
    }
    .lang-caret {
      font-size: 11px;
      transform: translateY(1px);
    }
    .lang-dropdown {
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      min-width: 148px;
      background: #0a0a1a;
      border: 1px solid #1e1e2e;
      border-radius: 8px;
      box-shadow: 0 14px 32px rgba(0, 0, 0, 0.45);
      padding: 6px;
      display: none;
      z-index: 80;
    }
    .lang-switcher.open .lang-dropdown {
      display: block;
      animation: langFadeIn 0.2s ease;
    }
    .lang-option {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 8px 10px;
      border-radius: 6px;
      color: #d4d4d8;
      font-size: 14px;
      text-decoration: none;
      transition: background 0.2s ease, color 0.2s ease;
    }
    .lang-option:hover,
    .lang-option.active {
      background: #1e1e2e;
      color: #f4f4f5;
    }
    .lang-check {
      color: #f4f4f5;
      opacity: 0;
      font-size: 13px;
    }
    .lang-option.active .lang-check {
      opacity: 1;
    }
    @keyframes langFadeIn {
      from { opacity: 0; transform: translateY(-4px); }
      to { opacity: 1; transform: translateY(0); }
    }