:root {
  --ink: #1a1a1a;
  --ink-2: #4a4a4a;
  --ink-3: #767676;
  --line: #e4e4e2;
  --bg: #ffffff;
  --bg-2: #faf9f7;
  --brand: #1d4e6f;
  --brand-soft: #eef4f8;
  --accent: #a8541f;
  --radius: 10px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.logo {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--brand);
  white-space: nowrap;
}
.logo span { font-size: 12px; color: var(--ink-3); letter-spacing: 2px; display: block; font-weight: 400; }
.nav { display: flex; gap: 28px; flex-wrap: wrap; }
.nav a { font-size: 15px; color: var(--ink-2); }
.nav a[aria-current="page"] { color: var(--brand); font-weight: 600; }

/* hero */
.hero { background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 64px 0 56px; }
.hero h1 { font-size: 34px; line-height: 1.35; margin: 0 0 20px; font-weight: 600; }
.hero .answer { font-size: 17px; color: var(--ink-2); max-width: 760px; margin: 0 0 28px; }
.hero-meta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 11px 24px;
  border-radius: var(--radius);
  font-size: 15px;
}
.btn:hover { background: #163c56; text-decoration: none; }
.btn-ghost {
  display: inline-block;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 11px 24px;
  border-radius: var(--radius);
  font-size: 15px;
}

/* sections */
section { padding: 56px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }
h2 { font-size: 25px; margin: 0 0 8px; font-weight: 600; }
h3 { font-size: 18px; margin: 32px 0 10px; font-weight: 600; }
h4 { font-size: 16px; margin: 22px 0 6px; font-weight: 600; }
.lede { color: var(--ink-3); margin: 0 0 28px; font-size: 15px; }
p { margin: 0 0 16px; }

/* answer block: the single most important GEO element */
.answer-block {
  background: var(--brand-soft);
  border-left: 3px solid var(--brand);
  padding: 18px 22px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 0 0 32px;
  font-size: 16px;
  color: var(--ink-2);
}
.answer-block strong { color: var(--ink); }

/* cards grid */
.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--bg);
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { font-size: 14.5px; color: var(--ink-2); margin: 0; }

/* table */
.table-wrap { overflow-x: auto; margin: 20px 0 28px; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; }
th { background: var(--bg-2); font-weight: 600; }
td { color: var(--ink-2); }

/* faq */
.faq-item { border-bottom: 1px solid var(--line); padding: 22px 0; }
.faq-item:first-of-type { border-top: 1px solid var(--line); }
.faq-item h3 { margin: 0 0 10px; font-size: 17px; font-weight: 600; }
.faq-item p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* footer */
.site-footer { background: var(--bg-2); border-top: 1px solid var(--line); padding: 44px 0 32px; font-size: 14px; color: var(--ink-3); }
.site-footer .wrap > div { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; }
.site-footer h4 { font-size: 14px; margin: 0 0 10px; color: var(--ink); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.legal { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.7; }

/* meta line */
.updated { font-size: 13px; color: var(--ink-3); margin-bottom: 24px; }

/* breadcrumb */
.crumbs { font-size: 13px; color: var(--ink-3); padding: 14px 0 0; }
.crumbs a { color: var(--ink-3); }

ul.clean { padding-left: 20px; }
ul.clean li { margin-bottom: 8px; }

.note {
  font-size: 13.5px;
  color: var(--ink-3);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  background: var(--bg-2);
}

@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  .hero { padding: 44px 0 36px; }
  .site-header .wrap { height: auto; padding-top: 14px; padding-bottom: 14px; flex-direction: column; align-items: flex-start; gap: 12px; }
  .nav { gap: 18px; }
}

/* 首页轮播图 */
.carousel { position: relative; background: var(--brand); color: #fff; padding: 0; overflow: hidden; }
.carousel .slide { min-height: 320px; display: flex; align-items: center; background-size: cover; background-position: center; }
.carousel .slide::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(29,78,111,.86), rgba(29,78,111,.45)); }
.carousel .slide-inner { position: relative; padding: 56px 24px; }
.carousel .slide h2 { color: #fff; font-size: 30px; margin: 0 0 12px; }
.carousel .slide p { color: #eaf2f8; font-size: 17px; margin: 0; max-width: 620px; }
.car-prev, .car-next { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border: none; border-radius: 50%; background: rgba(255,255,255,.25); color: #fff; font-size: 24px; line-height: 1; cursor: pointer; z-index: 2; }
.car-prev:hover, .car-next:hover { background: rgba(255,255,255,.45); }
.car-prev { left: 16px; }
.car-next { right: 16px; }
.car-dots { position: absolute; bottom: 16px; left: 0; right: 0; text-align: center; z-index: 2; }
.car-dots span { display: inline-block; width: 10px; height: 10px; margin: 0 5px; border-radius: 50%; background: rgba(255,255,255,.5); cursor: pointer; }
.car-dots span.on { background: #fff; }

/* 站点标志（展示用） */
.logo { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.logo-img { height: 34px; width: auto; display: block; }
.logo-badge {
  display: inline-block; font-size: 11px; line-height: 1; padding: 4px 8px;
  border-radius: 20px; background: var(--accent); color: #fff; font-weight: 700; letter-spacing: 1px;
}

/* 卡片图标 */
.card-ic { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; background: var(--brand-soft); color: var(--brand); margin-bottom: 14px; }
.ic { width: 22px; height: 22px; display: inline-block; vertical-align: middle; }

/* 院校表：英文名 / 次要信息 */
td .en { display: block; font-size: 12px; color: #6b7a86; margin-top: 2px; font-weight: 400; }
td .muted { display: block; font-size: 12px; color: #8a96a0; margin-top: 4px; }
#schools th:nth-child(1) { width: 70px; }
#schools th:nth-child(5) { width: 96px; }

/* 首页数据带（展示用） */
.stat-band { background: var(--brand); color: #fff; padding: 30px 0; }
.stat-band .wrap { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 22px; }
.stat { display: flex; align-items: center; gap: 14px; }
.stat-ic { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; flex: 0 0 auto; border-radius: 12px; background: rgba(255,255,255,.15); color: #fff; }
.stat-ic .ic { width: 26px; height: 26px; }
.stat b { display: block; font-size: 22px; font-weight: 700; line-height: 1.2; }
.stat span { font-size: 13.5px; opacity: .85; }

@media (max-width: 640px) {
  .stat-band .wrap { grid-template-columns: repeat(2, 1fr); }
  .logo-img { height: 30px; }
}


/* 图片上传槽位（后台可填，无图显示占位，不影响布局） */
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin-top: 14px; }
.img-slot { border-radius: var(--radius); overflow: hidden; }
.img-slot.filled img { display: block; width: 100%; height: 220px; object-fit: cover; }
.img-slot.filled figcaption { font-size: 13px; color: var(--ink-3); padding: 8px 10px; background: var(--bg-2); }
.img-slot.empty { border: 2px dashed var(--line); min-height: 170px; display: flex; align-items: center; justify-content: center; text-align: center; color: var(--ink-3); font-size: 13px; padding: 16px; background: var(--bg-2); }
.img-slot.empty .slot-ph { line-height: 1.6; }