/* ============================================
   项目申报与验收网 - 纯静态站点样式
   主色：校徽蓝 #1D4FA1
   ============================================ */

:root {
  --blue: #1D4FA1;
  --blue-dark: #16407F;
  --blue-light: #F0F4FA;
  --red: #D93025;
  --gold: #E8B84B;
  --text: #333333;
  --text-sub: #555555;
  --text-muted: #888888;
  --border: #E3E6EB;
  --divider: #E9EDF2;
  --bg-section: #F5F7FA;
  --bg-footer: #F0F0F0;
}

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: #FFFFFF;
  line-height: 1.6;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ---------- 顶部装饰条 ---------- */
.topbar {
  height: 6px;
  background: var(--blue);
}

/* ---------- 页头 ---------- */
.site-header {
  background: #FFFFFF;
  padding: 22px 0;
}

.brand {
  display: inline-block;
  line-height: 0;
}

.brand-logo {
  height: 50px;
  width: auto;
  display: block;
}

/* ---------- Banner（湖景图） ---------- */
.banner {
  position: relative;
  height: 400px;
  background: url("../images/campus-lake.jpg") center / cover no-repeat;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(
    90deg,
    rgba(13, 41, 89, 0.82) 0%,
    rgba(18, 56, 115, 0.45) 55%,
    rgba(13, 46, 102, 0.30) 100%
  );
}

.banner-kicker {
  font-size: 16px;
  font-weight: 500;
  color: #CFE0F5;
  letter-spacing: 6px;
}

.banner-title {
  margin-top: 10px;
  font-size: 48px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 2px;
}

.banner-sub {
  margin-top: 14px;
  font-size: 17px;
  color: #E8F0FA;
  line-height: 30px;
}

.banner-rule {
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 22px;
  border-radius: 2px;
  background: var(--gold);
}

/* ---------- 专栏区 ---------- */
.columns {
  background: var(--bg-section);
  padding: 44px 0 56px;
}

.columns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 20px;
  font-size: 18px;
  font-weight: 700;
  color: #1F2937;
  background: var(--blue-light);
}

.accent {
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: var(--blue);
}

.card-banner {
  display: block;
  width: 100%;
  height: auto;
}

.link-list {
  list-style: none;
  border-top: 1px solid var(--divider);
}

.link-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 20px;
  background: #FFFFFF;
}

.link-list li + li {
  border-top: 1px solid var(--divider);
}

.link-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background: var(--red);
}

.link-list a {
  flex: 1;
  font-size: 14px;
}

.link-list a:hover {
  color: var(--red);
  text-decoration: underline;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-footer);
  text-align: center;
  padding: 30px 40px 34px;
}

.footer-copy {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
}

.footer-info {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .columns-grid {
    grid-template-columns: 1fr;
  }

  .banner {
    height: 320px;
  }

  .banner-title {
    font-size: 36px;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 20px;
  }

  .banner {
    height: 260px;
  }

  .banner-title {
    font-size: 28px;
  }

  .banner-kicker {
    letter-spacing: 3px;
  }

  .site-header {
    padding: 16px 0;
  }

  .brand-logo {
    height: 40px;
  }
}