/* 基础主题变量 */
:root {
  --bg: #0d0f12;
  --card: #151922;
  --text: #eaeef3;
  --muted: #b7bdc9;
  --primary: #b22a2a; /* 武侠红 */
  --secondary: #2a6fb2; /* 深蓝 */
  --accent: #e6b422; /* 金色 */
  --border: #223046;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* 布局与容器 */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 15, 18, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
}
.nav ul {
  display: flex;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
}
.nav a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav a.active { color: var(--accent); }

/* 英雄区 */
.hero {
  position: relative;
  min-height: 56vh;
  display: grid;
  place-items: center;
  background-size: cover;
  background-position: center;
}
.hero .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(13,15,18,0.5), rgba(13,15,18,0.85));
}
.hero-content {
  position: relative;
  text-align: center;
  padding: 40px 0;
}
.hero h1 { font-size: 40px; margin: 0 0 10px; }
.hero p { color: var(--muted); margin: 0 0 20px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); background: rgba(255,255,255,0.06); }
.btn-primary { background: var(--primary); border-color: transparent; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary { background: var(--secondary); border-color: transparent; }

/* 特性区 */
.features { padding: 28px 0; }
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.feature-card h3 { margin-top: 0; }
.feature-card p { color: var(--muted); }

/* 公告与统计 */
.announcements { padding: 12px 0 24px; }
.announcement-list { list-style: none; margin: 0; padding: 0; }
.announcement-list li { padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; background: var(--card); }
.accent { color: var(--accent); }

.server-stats { padding: 12px 0 32px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; text-align: center; }
.stat .label { color: var(--muted); display: block; }
.stat .value { font-size: 18px; font-weight: 700; }

/* 页面通用 */
.page { padding: 26px 0 40px; }
.post { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.meta { color: var(--muted); font-size: 14px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.note { margin-top: 16px; background: rgba(230, 180, 34, 0.08); color: var(--text); border: 1px solid rgba(230, 180, 34, 0.3); border-radius: 10px; padding: 12px; }
.steps { list-style: decimal; padding-left: 18px; }
.rules { list-style: disc; padding-left: 18px; }

/* 页脚 */
.site-footer { border-top: 1px solid var(--border); background: rgba(13, 15, 18, 0.7); }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 18px 0; }
.site-footer h4 { margin: 0 0 8px; }
.site-footer p { margin: 0; color: var(--muted); }

/* 响应式 */
@media (max-width: 900px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .card-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-block; }
  .nav { display: none; }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; gap: 6px; padding: 12px 0; }
  .feature-grid, .stats-grid, .card-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
}