/* 基础样式 */
:root {
  --bg: #0b1020;
  --panel: #151b2f;
  --border: #23304f;
  --text: #e6ecff;
  --muted: #a8b3cf;
  --primary: #4f7cff;
  --primary-600: #3e67e6;
  --accent: #00d1b2;
  --danger: #ff5252;
  --shadow: 0 6px 24px rgba(0,0,0,.24);
}

* { box-sizing: border-box; }
html,body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, PingFang SC, Noto Sans CJK SC, Microsoft YaHei, Helvetica Neue, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, rgba(29,36,66,.8), transparent),
              radial-gradient(1000px 500px at 80% -20%, rgba(0,255,153,.25), transparent),
              var(--bg);
}

/* 移动端导航 */
.menu-toggle {
  display: none;
  align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border-radius: 10px; border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
}
.menu-toggle svg { width: 20px; height: 20px; }

.container { width: min(1100px, 92%); margin: 0 auto; }
.grid { display: grid; gap: 20px; }
.center { text-align: center; }
.muted { color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border);
  color: var(--text); background: linear-gradient(180deg, #1f2b4d, #18223f);
  text-decoration: none; cursor: pointer; transition: transform .06s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); background: linear-gradient(180deg, #273559, #1b2748); }
.btn-primary { background: linear-gradient(180deg, var(--primary), var(--primary-600)); border-color: #2b4fb4; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; border-color: var(--border); }

.site-header { position: sticky; top: 0; z-index: 40; backdrop-filter: blur(8px); background: rgba(10,13,26,.6); border-bottom: 1px solid rgba(255,255,255,.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: .2px; }
.nav a { color: var(--text); text-decoration: none; margin-left: 14px; padding: 8px 10px; border-radius: 8px; }
.nav a:hover { background: rgba(255,255,255,.06); }
.nav .active { background: rgba(79,124,255,.16); border: 1px solid rgba(79,124,255,.35); }

.hero { padding: 56px 0 40px; }
.hero-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: center; }
.hero h1 { margin: 0 0 12px; font-size: 32px; }
.hero p { margin: 0 0 18px; color: var(--muted); }
.hero-cta { display: flex; gap: 12px; }
.hero-art img { width: 100%; height: auto; border-radius: 16px; border: 1px solid var(--border); box-shadow: var(--shadow); }

.features { padding: 30px 0; }
.features h2 { margin: 0 0 16px; }
.features-grid { grid-template-columns: repeat(3, 1fr); }
.card { background: rgba(12,16,34,.72); border: 1px solid var(--border); border-radius: 14px; padding: 16px; box-shadow: var(--shadow); }
.feature img { width: 40px; height: 40px; }
.feature h3 { margin: 10px 0 6px; }
.feature p { margin: 0; color: var(--muted); }

.products-teaser { padding: 30px 0; }
.products-grid { grid-template-columns: repeat(3, 1fr); }
.product-card { display: flex; flex-direction: column; gap: 10px; }
.product-card h3 { margin: 4px 0; }
.product-meta { color: var(--muted); font-size: 14px; }
.price { font-size: 22px; font-weight: 700; }

.about { padding: 30px 0 60px; }
.about-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; }
.contact h3 { margin-top: 0; }

.page-header { margin: 24px 0 16px; }

.order-form { display: grid; gap: 14px; }
.form-row { display: grid; gap: 6px; }
.form-row input, .form-row textarea {
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: rgba(10,14,28,.6); color: var(--text);
}
.order-summary { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px; border-radius: 10px; background: rgba(255,255,255,.04); border: 1px solid var(--border); }
.pay-actions { display: grid; gap: 8px; }

.faq details { background: rgba(255,255,255,.04); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; margin: 10px 0; }

.site-footer { border-top: 1px solid rgba(255,255,255,.06); margin-top: 40px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.legal { color: var(--muted); font-size: 14px; }
.legal a { color: var(--muted); text-decoration: none; }

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .features-grid, .products-grid { grid-template-columns: 1fr 1fr; }
  .about-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .features-grid, .products-grid { grid-template-columns: 1fr; }
}

/* 移动端导航响应式 */
@media (max-width: 800px) {
  .header-inner { align-items: flex-start; }
  .menu-toggle { display: inline-flex; }
  .site-header .nav { display: none; grid-template-columns: 1fr; width: 100%; margin-top: 8px; }
  .site-header.open .nav { display: grid; }
  .nav a { margin: 6px 0 0 0; display: block; }
}