/* ===== 学术蓝模板 · 全局样式 ===== */
:root {
  --primary: #14497a;
  --primary-light: #1f6399;
  --accent: #c8a45c;
  --text: #24303d;
  --muted: #64748b;
  --bg: #f5f7fa;
  --card: #ffffff;
  --border: #e2e8f0;
  --radius: 10px;
  --shadow: 0 4px 18px rgba(20, 73, 122, 0.08);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* 头部 */
.site-header {
  background: linear-gradient(135deg, #0f3a61 0%, #1f6399 100%);
  color: #fff;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.12);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding-top: 26px; padding-bottom: 26px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 46px; height: 46px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700; color: var(--accent);
}
.brand-text h1 { font-size: 24px; font-weight: 600; letter-spacing: .5px; }
.brand-text h1 a { color: #fff; }
.subtitle { font-size: 14px; opacity: .82; margin-top: 2px; }
.header-meta { display: flex; gap: 18px; font-size: 14px; opacity: .92; flex-wrap: wrap; }
.header-meta span { white-space: nowrap; }

/* 导航 */
.site-nav { background: rgba(0, 0, 0, 0.16); border-top: 1px solid rgba(255, 255, 255, 0.12); }
.nav-inner { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-inner a {
  color: #fff; padding: 13px 18px; font-size: 15px; position: relative;
  transition: background .2s;
}
.nav-inner a:hover { background: rgba(255, 255, 255, 0.12); }
.nav-inner a.active { background: rgba(255, 255, 255, 0.18); }
.nav-inner a.active::after {
  content: ""; position: absolute; left: 18px; right: 18px; bottom: 6px;
  height: 2px; background: var(--accent);
}

/* 首页 Hero */
.hero {
  background: linear-gradient(135deg, #123c66 0%, #1f6399 60%, #2b7ab8 100%);
  color: #fff; padding: 64px 0 56px;
}
.hero-kicker { letter-spacing: 3px; font-size: 12px; opacity: .75; }
.hero-title { font-size: 40px; line-height: 1.3; margin: 14px 0 10px; font-weight: 600; }
.hero-sub { font-size: 18px; opacity: .9; }
.hero-info { display: flex; gap: 36px; margin-top: 30px; flex-wrap: wrap; font-size: 15px; }
.hero-info li { list-style: none; }
.hero-info strong { display: block; font-size: 12px; opacity: .7; letter-spacing: 1px; margin-bottom: 3px; }
.hero-actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 26px; border-radius: 999px;
  font-size: 15px; transition: .2s;
}
.btn.primary { background: var(--accent); color: #1a1a1a; font-weight: 600; }
.btn.primary:hover { background: #dcb96e; }
.btn.ghost { border: 1px solid rgba(255, 255, 255, 0.5); color: #fff; }
.btn.ghost:hover { background: rgba(255, 255, 255, 0.12); }

/* 内容区 */
.page-body { padding: 44px 24px 64px; }
.card {
  background: var(--card); border-radius: var(--radius); padding: 30px 32px;
  box-shadow: var(--shadow); margin-bottom: 26px; border: 1px solid var(--border);
}
.section-title {
  font-size: 18px; color: var(--primary); margin-bottom: 16px;
  padding-left: 12px; border-left: 4px solid var(--accent);
}
.rich-text p { margin-bottom: 12px; }
.rich-text h3 { color: var(--primary); font-size: 17px; margin: 20px 0 10px; }
.rich-text table { width: 100%; border-collapse: collapse; margin: 14px 0; }
.rich-text th, .rich-text td { border: 1px solid var(--border); padding: 10px; }
.rich-text img { border-radius: 8px; margin: 12px 0; }

.notice-card { border-left: 4px solid var(--accent); }

.quick-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.quick-links a {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; transition: .2s; box-shadow: var(--shadow);
}
.quick-links a:hover { transform: translateY(-3px); border-color: var(--primary-light); }
.quick-links strong { display: block; color: var(--primary); font-size: 17px; margin-bottom: 6px; }
.quick-links span { font-size: 13px; color: var(--muted); }

/* 内页标题 */
.page-head { margin-bottom: 26px; }
.page-head h2 {
  font-size: 28px; color: var(--primary); font-weight: 600;
  padding-bottom: 12px; border-bottom: 2px solid var(--border); margin-bottom: 12px;
}
.page-head p { color: var(--muted); font-size: 14px; }
.deadline { color: #b45309 !important; font-weight: 600; }

/* 表格 */
.data-table {
  width: 100%; border-collapse: collapse; background: #fff;
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.data-table thead th {
  background: var(--primary); color: #fff; font-weight: 500;
  padding: 13px 12px; font-size: 14px; text-align: center;
}
.data-table tbody td { padding: 12px; border-bottom: 1px solid var(--border); font-size: 15px; }
.data-table tbody tr:nth-child(even) { background: #fafbfd; }
.data-table tbody tr:hover { background: #eef4fa; }

/* 组委会 */
.member-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.member-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 20px; text-align: center; box-shadow: var(--shadow);
}
.member-avatar {
  width: 62px; height: 62px; margin: 0 auto 14px; border-radius: 50%;
  background: linear-gradient(135deg, #1f6399, #2b7ab8); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 600;
}
.member-card h4 { font-size: 17px; margin-bottom: 4px; }
.member-card .role { color: var(--primary); font-size: 13px; }
.member-card .aff { color: var(--muted); font-size: 13px; }

/* 联系 */
.contact-list { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--border); }
.contact-list p { display: flex; gap: 14px; font-size: 15px; margin-bottom: 8px; }
.contact-list span { color: var(--muted); min-width: 60px; }

.empty-tip {
  background: #fff; border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 40px; text-align: center; color: var(--muted);
}

/* 页脚 */
.site-footer { background: #0e2b47; color: rgba(255, 255, 255, 0.78); padding: 30px 0; font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-contact { text-align: right; }
@media (max-width: 860px) {
  .footer-contact { text-align: left; }
  .header-meta { display: none; }
  .brand-text h1 { font-size: 19px; }
  .hero-title { font-size: 27px; }
  .quick-links { grid-template-columns: repeat(2, 1fr); }
  .member-grid { grid-template-columns: repeat(2, 1fr); }
  .data-table { display: block; overflow-x: auto; white-space: nowrap; }
  .nav-inner a { padding: 11px 12px; font-size: 14px; }
  .card { padding: 22px 18px; }
}
@media (max-width: 480px) {
  .quick-links, .member-grid { grid-template-columns: 1fr; }
}