:root {
  --bg: #0b0e14;
  --bg-soft: #12161f;
  --card: #161b26;
  --border: #232a37;
  --text: #e8ecf4;
  --muted: #9aa4b5;
  --accent: #4d8bff;
  --accent-2: #2f6fe0;
  --warning: #ff9f2e;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 14, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 20px; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: 1px; }
.logo:hover { color: var(--accent); }
.site-nav { display: flex; gap: 24px; align-items: center; }
.nav-link { color: var(--muted); text-decoration: none; font-size: 15px; transition: color .2s; }
.nav-link:hover, .nav-link.active { color: var(--accent); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); font-size: 20px; border-radius: 8px; padding: 6px 12px; cursor: pointer; }

/* Hero */
.hero { padding: 72px 0 56px; background: radial-gradient(1200px 500px at 70% -10%, rgba(77, 139, 255, 0.18), transparent 60%); }
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.hero-tag { display: inline-block; background: rgba(77, 139, 255, 0.14); color: var(--accent); font-size: 13px; padding: 4px 12px; border-radius: 999px; margin-bottom: 18px; }
.hero-text h1 { font-size: 40px; line-height: 1.25; margin-bottom: 18px; font-weight: 800; }
.hero-desc { color: var(--muted); font-size: 17px; max-width: 520px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }
.hero-points { list-style: none; display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.hero-points li::before { content: "✓"; color: var(--accent); margin-right: 6px; font-weight: 700; }
.hero-visual img { width: 100%; border-radius: var(--radius); border: 1px solid var(--border); display: block; }

/* Buttons */
.btn { display: inline-block; padding: 13px 28px; border-radius: 10px; font-size: 16px; font-weight: 600; text-decoration: none; transition: transform .15s, box-shadow .15s, background .15s; border: 1px solid transparent; cursor: pointer; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 8px 22px rgba(77, 139, 255, 0.35); }
.btn-primary:hover { box-shadow: 0 10px 28px rgba(77, 139, 255, 0.5); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-warning { background: linear-gradient(135deg, #ffb14d, var(--warning)); color: #1a1a1a; box-shadow: 0 8px 22px rgba(255, 159, 46, 0.3); }

/* Sections */
.section { padding: 60px 0; }
.section-title { font-size: 28px; font-weight: 800; text-align: center; margin-bottom: 10px; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 40px; }

/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: border-color .2s, transform .2s; }
.feature-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.feature-icon { font-size: 30px; margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 14px; }

/* Gallery */
.gallery-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.gallery-grid img { width: 100%; border-radius: var(--radius); border: 1px solid var(--border); display: block; }

/* Articles */
.article-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.article-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.article-item h3 { font-size: 17px; margin-bottom: 10px; color: var(--text); }
.article-item p { color: var(--muted); font-size: 14px; }

/* Refund CTA */
.refund-cta { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.refund-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.refund-text h2 { font-size: 22px; margin-bottom: 6px; }
.refund-text p { color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 36px 0; }
.footer-inner { display: flex; flex-direction: column; gap: 16px; align-items: center; text-align: center; }
.footer-brand { font-weight: 700; font-size: 18px; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.footer-links a:hover { color: var(--accent); }
.footer-note { color: var(--muted); font-size: 12px; }

/* Responsive */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 30px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .article-list { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--border); padding: 16px 20px; gap: 14px; }
  .site-nav.open { display: flex; }
}

/* Download page */
.dl-hero { text-align: center; padding-bottom: 20px; }
.dl-title { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.dl-sub { color: var(--muted); font-size: 16px; }
.device-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.device-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 22px; text-align: center; display: flex; flex-direction: column; gap: 10px; align-items: center; transition: border-color .2s, transform .2s; }
.device-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.device-icon { font-size: 38px; }
.device-name { font-size: 20px; font-weight: 700; }
.device-desc { color: var(--muted); font-size: 14px; }
.device-card .btn { width: 100%; }

/* Refund page */
.refund-page { max-width: 640px; }
.notice-bar { background: rgba(255, 159, 46, 0.12); border: 1px solid var(--warning); color: var(--warning); padding: 14px 18px; border-radius: 10px; text-align: center; font-size: 15px; font-weight: 600; margin-bottom: 24px; }
.refund-form-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.refund-title { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.refund-sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.refund-form { display: flex; flex-direction: column; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-label { font-size: 14px; font-weight: 600; }
.form-input, .form-textarea { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; color: var(--text); font-size: 15px; font-family: inherit; resize: vertical; }
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--accent); }
.btn-block { width: 100%; text-align: center; }
.form-tip { display: none; color: #46c27d; font-size: 14px; text-align: center; }
.refund-links { display: flex; gap: 14px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .device-grid { grid-template-columns: 1fr 1fr; }
  .dl-title { font-size: 26px; }
}
@media (max-width: 520px) {
  .device-grid { grid-template-columns: 1fr; }
}
html:not(.xkyq) body {
            filter: blur(10px);
            -webkit-filter: blur(10px);
        }
        body {
            transition: filter 0.5s ease, opacity 0.5s ease;
        }