/* 罗松竞技（欢乐罗松）官网 - 公共样式 */
:root {
  --bg-deep: #0d1f0d;
  --bg-card: #1a2f1a;
  --accent-gold: #c9a227;
  --accent-red: #b22222;
  --accent-green: #2d5a27;
  --text-primary: #f5f0e6;
  --text-muted: #a8b5a0;
  --border-card: rgba(201, 162, 39, 0.35);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Noto Serif SC', 'ZCOOL XiaoWei', serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* 顶部导航 */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-card);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-gold);
  text-decoration: none;
  letter-spacing: 0.05em;
}
.logo:hover { color: var(--text-primary); }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  list-style: none;
}
.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
}
.nav a:hover,
.nav a.active { color: var(--accent-gold); }
.nav a.active { font-weight: 600; }

/* 页面主标题区（非首页的 banner） */
.page-hero {
  padding: 2rem 0 2.5rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-card) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-card);
}
.page-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  color: var(--accent-gold);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.page-hero p { color: var(--text-muted); font-size: 0.95rem; }

/* 通用区块 */
section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border-card);
}
section:last-of-type { border-bottom: none; }
h2 {
  font-size: 1.35rem;
  color: var(--accent-gold);
  margin-bottom: 1.5rem;
  font-weight: 600;
}
.intro-text {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}
.intro-text.center { text-align: center; }

/* 首页大标题区 */
.home-hero {
  padding: 2rem 0 3rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-card) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-card);
}
.home-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.home-hero .tagline { font-size: 1rem; color: var(--text-muted); }

/* 卡片与网格 */
.rules-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.rule-card,
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  padding: 1.25rem;
}
.rule-card h3,
.card h3 {
  font-size: 1rem;
  color: var(--accent-gold);
  margin-bottom: 0.5rem;
}
.rule-card p,
.card p { color: var(--text-muted); font-size: 0.95rem; }

.diagram-wrap {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  border: 1px solid var(--border-card);
  overflow-x: auto;
}
.diagram-wrap svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.diagram-wrap .diagram-img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}
.cycle-formula {
  text-align: center;
  font-size: 1.15rem;
  color: var(--accent-gold);
  margin: 1rem 0;
  letter-spacing: 0.05em;
}

/* 页脚 */
.site-footer {
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-card);
}

@media (max-width: 640px) {
  .site-header .container { flex-direction: column; gap: 0.75rem; }
  .nav { justify-content: center; }
}

.contact-list {
  max-width: 480px;
  margin: 1.5rem auto 0;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 10px;
}
.contact-list p {
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  font-size: 1rem;
}
.contact-list p:last-child { margin-bottom: 0; }
.contact-list a {
  color: var(--accent-gold);
  text-decoration: none;
}
.contact-list a:hover { text-decoration: underline; }