:root {
    --bg: #0f0f10;
    --panel: #18181b;
    --panel-light: #222226;
    --text: #f2f2f4;
    --text-dim: #a1a1aa;
    --orange: #ff9a00;
    --border: #2a2a30;
    --radius: 10px;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  img { display: block; max-width: 100%; }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 16, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: height 0.2s ease-out, background 0.2s;
  }
  .header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 32px;
  }
  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.5px;
  }
  .brand img { height: 32px; width: auto; border-radius: 8px; }
  .main-nav {
    display: flex;
    gap: 26px;
    font-size: 15px;
    color: var(--text-dim);
  }
  .main-nav a { position: relative; padding: 6px 0; transition: color 0.2s; }
  .main-nav a:hover { color: #fff; }
  .main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--orange);
    transition: width 0.2s;
  }
  .main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
  .main-nav a.active { color: #fff; }
  .header-right { margin-left: auto; }
  .download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--orange);
    color: #1a1a1a;
    font-weight: 600;
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 22px;
    transition: filter 0.2s, transform 0.2s;
  }
  .download-btn:hover { filter: brightness(1.1); transform: translateY(-1px); }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .hero {
    padding: 56px 0 40px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }
  .hero-text h1 {
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 20px;
  }
  .hero-text h1 span { color: var(--orange); }
  .hero-text p {
    font-size: 16px;
    color: var(--text-dim);
    margin-bottom: 28px;
    max-width: 46ch;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
  }
  .primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--orange);
    color: #1a1a1a;
    font-weight: 700;
    font-size: 16px;
    padding: 14px 32px;
    border-radius: var(--radius);
    transition: filter 0.2s, transform 0.2s;
  }
  .primary-btn:hover { filter: brightness(1.1); transform: translateY(-1px); }
  .ghost-btn {
    display: inline-flex;
    align-items: center;
    font-size: 15px;
    color: var(--text-dim);
    padding: 14px 8px;
    border-bottom: 1px solid transparent;
    transition: color 0.2s;
  }
  .ghost-btn:hover { color: #fff; }

  .hero-visual {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  }
  .hero-visual img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }
  .hero-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15,15,16,0.75), transparent 55%);
    pointer-events: none;
  }
  .hero-tag {
    position: absolute;
    left: 20px;
    bottom: 18px;
    z-index: 2;
    font-size: 13px;
    color: #ffd89e;
    background: rgba(0,0,0,0.5);
    border: 1px solid rgba(255,154,0,0.4);
    padding: 6px 14px;
    border-radius: 20px;
  }

  section { padding: 56px 0; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 800;
    letter-spacing: -0.3px;
    margin-bottom: 10px;
  }
  .section-head p { color: var(--text-dim); font-size: 15px; max-width: 60ch; }

  .feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .feature-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 28px 24px;
    transition: transform 0.25s, border-color 0.25s, background 0.25s;
  }
  .feature-card:hover { transform: translateY(-4px); border-color: rgba(255,154,0,0.45); background: var(--panel-light); }
  .feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255,154,0,0.12);
    color: var(--orange);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 18px;
  }
  .feature-card h3 { font-size: 17px; margin-bottom: 10px; }
  .feature-card p { font-size: 14px; color: var(--text-dim); }

  .showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  .shot {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--panel);
  }
  .shot img {
    width: 100%;
    height: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    transition: transform 0.4s ease;
  }
  .shot:hover img { transform: scale(1.05); }
  .shot figcaption {
    padding: 12px 14px;
    font-size: 13px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
  }
  .shot.wide { grid-column: span 2; }
  .shot.wide img { aspect-ratio: 16/9; }

  .steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    counter-reset: step;
  }
  .step {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 30px 24px 26px;
    counter-increment: step;
  }
  .step::before {
    content: counter(step, decimal-leading-zero);
    font-size: 13px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 14px;
  }
  .step h3 { font-size: 17px; margin-bottom: 10px; }
  .step p { font-size: 14px; color: var(--text-dim); }

  .faq-list { display: flex; flex-direction: column; gap: 14px; }
  .faq-item {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px 24px;
  }
  .faq-item h3 { font-size: 16px; margin-bottom: 8px; }
  .faq-item p { font-size: 14px; color: var(--text-dim); }

  .cta-band {
    background: linear-gradient(135deg, rgba(255,154,0,0.14), rgba(255,154,0,0.02));
    border: 1px solid rgba(255,154,0,0.3);
    border-radius: 18px;
    padding: 48px 40px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
  .cta-band h2 { font-size: clamp(22px, 3vw, 28px); margin-bottom: 8px; }
  .cta-band p { color: var(--text-dim); font-size: 15px; }

  .site-footer {
    margin-top: 40px;
    padding: 36px 0 44px;
    border-top: 1px solid var(--border);
    color: #6b6b74;
    font-size: 13px;
  }
  .footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
  }
  .footer-inner a { color: #8b8b95; }
  .footer-inner a:hover { color: var(--text-dim); }
  .footer-meta { display: flex; flex-wrap: wrap; gap: 16px; }

  @media (max-width: 1024px) {
    .hero { grid-template-columns: 1fr; gap: 32px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .showcase-grid { grid-template-columns: repeat(3, 1fr); }
    .steps { grid-template-columns: 1fr; }
    .header-inner { gap: 20px; }
    .main-nav { display: none; }
    .cta-band { padding: 36px 26px; }
  }

  @media (max-width: 768px) {
    .container { padding: 0 16px; }
    .header-inner { padding: 0 16px; height: 58px; }
    .brand { font-size: 16px; }
    .download-btn { padding: 8px 16px; font-size: 13px; }
    .hero { padding: 36px 0 24px; }
    .hero-text p { font-size: 15px; }
    section { padding: 40px 0; }
    .feature-grid { grid-template-columns: 1fr; gap: 14px; }
    .showcase-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .shot.wide { grid-column: span 2; }
    .shot figcaption { padding: 9px 10px; font-size: 12px; }
    .cta-band { padding: 28px 20px; border-radius: 14px; }
    .footer-inner { flex-direction: column; gap: 14px; }
    .footer-meta { flex-direction: column; gap: 6px; }
  }