/* 天下式庠 · 全站样式
   新中式清爽风：宣纸白底、墨青主色、朱砂点缀，响应式布局 */

:root {
  --paper: #faf7ee;        /* 宣纸白 */
  --paper-deep: #f3ecdc;
  --ink: #22333a;          /* 墨青 */
  --ink-soft: #4a5d63;
  --cinnabar: #b63a2a;     /* 朱砂 */
  --cinnabar-dark: #8f2b1f;
  --gold: #b98a2f;
  --line: #e3d9c2;
  --card: #fffdf7;
  --art-font: "Ma Shan Zheng", "Kaiti SC", "KaiTi", "STKaiti", "TW-Kai", "DFKai-SB", serif;
  --body-font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

body {
  font-family: var(--body-font);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.8;
  background-image: radial-gradient(circle at 15% 0%, rgba(185,138,47,.06), transparent 40%);
}

img { max-width: 100%; display: block; }
a { color: var(--cinnabar); text-decoration: none; }
a:hover { color: var(--cinnabar-dark); text-decoration: underline; }

/* ---------- 页眉 ---------- */
.site-header { background: var(--card); border-bottom: 3px double var(--cinnabar); position: sticky; top: 0; z-index: 50; }
.header-inner {
  max-width: 1100px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--ink); color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; flex: none;
}
.brand-name {
  font-family: var(--art-font); font-size: 30px; letter-spacing: 6px;
  display: block; line-height: 1.2;
}
.brand-sub { font-size: 12px; color: var(--ink-soft); letter-spacing: 1px; display: block; }

.main-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav-item { position: relative; }
.nav-item > a { display: block; }
.main-nav a {
  color: var(--ink); padding: 8px 14px; border-radius: 6px; font-size: 15px; white-space: nowrap;
}
.main-nav a:hover { background: var(--paper-deep); text-decoration: none; }
.main-nav a.active { background: var(--cinnabar); color: #fff; }

.menu-toggle {
  display: none; font-size: 24px; background: none; border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 12px; cursor: pointer; color: var(--ink);
}

.fictional-bar {
  background: var(--cinnabar); color: #fff; text-align: center;
  font-size: 12px; letter-spacing: 2px; padding: 4px 10px;
}

/* ---------- 通用版式 ---------- */
.wrap { max-width: 1100px; margin: 0 auto; padding: 40px 20px; }
.page-hero {
  background: linear-gradient(135deg, var(--ink) 0%, #2f4a52 70%, #3c5a52 100%);
  color: var(--paper); padding: 56px 20px; text-align: center;
}
.page-hero h1 { font-family: var(--art-font); font-size: 44px; letter-spacing: 10px; margin-bottom: 8px; }
.page-hero p { color: #d8cfb8; letter-spacing: 3px; }
.section-title {
  font-family: var(--art-font); font-size: 32px; letter-spacing: 6px;
  text-align: center; margin-bottom: 6px;
}
.section-sub { text-align: center; color: var(--ink-soft); margin-bottom: 28px; letter-spacing: 2px; }
.divider { width: 120px; height: 3px; background: var(--cinnabar); margin: 10px auto 30px; border-radius: 2px; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 24px rgba(34,51,58,.12); }
.card img { width: 100%; height: 190px; object-fit: cover; }
.card-body { padding: 18px 20px; }
.card-body h3 { font-family: var(--art-font); font-size: 22px; letter-spacing: 3px; margin-bottom: 8px; }
.card-body h3 .tag {
  font-family: var(--body-font); font-size: 12px; background: var(--paper-deep);
  color: var(--cinnabar); border-radius: 4px; padding: 2px 8px; margin-left: 8px; letter-spacing: 1px;
}
.card-body p { font-size: 14px; color: var(--ink-soft); }
.card-meta { font-size: 12px; color: var(--gold); letter-spacing: 1px; margin-top: 10px; }

.quote {
  border-left: 4px solid var(--cinnabar); background: var(--card);
  padding: 14px 20px; margin: 18px 0; border-radius: 0 8px 8px 0;
  font-size: 15px; color: var(--ink-soft);
}
.quote strong { color: var(--ink); }

.btn {
  display: inline-block; background: var(--cinnabar); color: #fff !important;
  padding: 10px 28px; border-radius: 8px; letter-spacing: 3px; margin: 6px;
}
.btn:hover { background: var(--cinnabar-dark); text-decoration: none; }
.btn.ghost { background: transparent; border: 1px solid var(--paper); }

/* ---------- 首页 ---------- */
.hero {
  position: relative; min-height: 480px; display: flex; align-items: center; justify-content: center;
  text-align: center; color: #fff; overflow: hidden;
  background: url('../images/hero.jpg') center/cover no-repeat, var(--ink);
}
.hero::after { content: ""; position: absolute; inset: 0; background: rgba(20,32,36,.55); }
.hero-inner { position: relative; z-index: 1; padding: 60px 20px; }
.hero-name {
  font-family: var(--art-font); font-size: 76px; letter-spacing: 18px;
  text-shadow: 0 4px 18px rgba(0,0,0,.5); margin-bottom: 6px;
}
.hero-annotation { letter-spacing: 6px; color: #e8dcc0; margin-bottom: 18px; }
.hero-motto {
  font-family: var(--art-font); font-size: 30px; letter-spacing: 6px;
  background: rgba(182,58,42,.85); display: inline-block;
  padding: 10px 30px; border-radius: 10px; margin: 14px 0 22px;
}
.hero-notice { font-size: 12px; color: #d8cfb8; letter-spacing: 2px; margin-top: 14px; }

.motto-band { background: var(--ink); color: var(--paper); text-align: center; padding: 34px 20px; }
.motto-band .motto-text { font-family: var(--art-font); font-size: 32px; letter-spacing: 8px; }
.motto-band .motto-note { color: #b9ac8d; font-size: 13px; letter-spacing: 2px; margin-top: 8px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; text-align: center; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 22px 10px; }
.stat .num { font-family: var(--art-font); font-size: 36px; color: var(--cinnabar); }
.stat .label { font-size: 13px; color: var(--ink-soft); letter-spacing: 2px; }

.timeline { border-left: 3px solid var(--line); margin: 10px 0 10px 10px; padding-left: 24px; }
.timeline-item { margin-bottom: 22px; position: relative; }
.timeline-item::before {
  content: "◉"; position: absolute; left: -35px; top: 2px; color: var(--cinnabar); background: var(--paper);
}
.timeline-item .era { font-family: var(--art-font); font-size: 20px; letter-spacing: 3px; color: var(--cinnabar); }

.banner-img { border-radius: 12px; overflow: hidden; border: 1px solid var(--line); margin: 20px 0; }
.banner-img img { width: 100%; max-height: 380px; object-fit: cover; }
.banner-img figcaption { background: var(--card); padding: 10px 16px; font-size: 13px; color: var(--ink-soft); text-align: center; letter-spacing: 1px; }

table.info-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; margin: 16px 0; }
table.info-table th, table.info-table td { border: 1px solid var(--line); padding: 12px 16px; text-align: left; font-size: 14px; }
table.info-table th { background: var(--paper-deep); width: 30%; letter-spacing: 2px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: #cfc4a8; margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 36px 20px; text-align: center; }
.footer-name { font-family: var(--art-font); font-size: 28px; letter-spacing: 8px; color: var(--paper); }
.footer-annotation { font-size: 13px; letter-spacing: 4px; color: #9d9178; margin-bottom: 12px; }
.footer-motto { font-family: var(--art-font); font-size: 20px; letter-spacing: 5px; color: var(--paper); margin-bottom: 16px; }
.footer-nav { margin-bottom: 16px; }
.footer-nav a { color: #cfc4a8; margin: 0 10px; font-size: 14px; }
.footer-note { font-size: 12px; color: #8d8471; line-height: 2; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--card); flex-direction: column; padding: 10px;
    border-bottom: 3px double var(--cinnabar); box-shadow: 0 12px 20px rgba(0,0,0,.12);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-bottom: 1px solid var(--line); }
  .site-header { position: relative; }
  .header-inner { flex-wrap: wrap; }
  .hero-name { font-size: 48px; letter-spacing: 10px; }
  .hero-motto { font-size: 22px; letter-spacing: 4px; }
  .page-hero h1 { font-size: 32px; letter-spacing: 6px; }
  .motto-band .motto-text { font-size: 22px; letter-spacing: 4px; }
}

/* 入场小动画 */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 校徽与小元素 ---------- */
img.brand-mark { background: transparent; object-fit: contain; }
.sec-icon { width: 30px; height: 30px; vertical-align: -5px; margin-right: 8px; }
.cloud-divider {
  height: 26px; margin: 4px auto 26px; max-width: 480px;
  background: url('../images/divider-cloud.svg') center/contain no-repeat;
  opacity: .92;
}

/* ---------- 桌面端下拉导航 ---------- */
.nav-item { position: relative; }
.nav-parent::after { content: " ▾"; font-size: 11px; color: var(--ink-soft); }
.has-children .dropdown {
  position: absolute; top: 100%; left: 0; min-width: 190px;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 14px 30px rgba(34,51,58,.16); padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  z-index: 60;
}
.has-children:hover .dropdown,
.has-children:focus-within .dropdown { opacity: 1; visibility: visible; transform: none; }
.has-children .dropdown a { display: block; padding: 10px 14px; border-radius: 6px; font-size: 14px; }
.has-children .dropdown a:hover { background: var(--paper-deep); text-decoration: none; }
.has-children .dropdown a.active { background: var(--cinnabar); color: #fff; }
.nav-item.active-parent > .nav-parent { background: var(--paper-deep); font-weight: 600; }
.submenu-toggle { display: none; }

/* ---------- 卡片悬停：上浮 + 图片缓缩放 ---------- */
.card img { transition: transform .55s ease; }
.card:hover img { transform: scale(1.07); }

/* ---------- 花瓣/云雾画布 ---------- */
#petalCanvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 55; opacity: .5;
}

/* ---------- 回到顶部 & 特效开关 ---------- */
.back-top, .fx-toggle {
  position: fixed; right: 18px; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card); color: var(--cinnabar);
  font-size: 20px; cursor: pointer; z-index: 70;
  box-shadow: 0 6px 16px rgba(34,51,58,.18);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s, transform .25s, visibility .25s;
}
.back-top.show, .fx-toggle.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover, .fx-toggle:hover { background: var(--cinnabar); color: #fff; border-color: var(--cinnabar); }
.back-top { bottom: 20px; }
.fx-toggle { bottom: 74px; font-size: 18px; }

/* ---------- 页脚分组导航 ---------- */
.footer-nav .footer-group { display: block; margin: 10px 0; font-size: 14px; }
.footer-group-label { color: var(--paper); letter-spacing: 2px; margin-right: 6px; }

/* ---------- 首页 hero 视差 ---------- */
.hero-inner { will-change: transform; }

/* ---------- 响应式：移动端手风琴子菜单 ---------- */
@media (max-width: 768px) {
  .nav-item { width: 100%; }
  .has-children { flex-wrap: wrap; }
  .has-children .dropdown { width: 100%; }
  .has-children .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; border-radius: 0; padding: 0 0 0 12px;
    display: none; background: transparent;
    transition: none;
  }
  .has-children.sub-open .dropdown { display: block; }
  .has-children:hover .dropdown { opacity: 1; visibility: visible; }
  .has-children > a.nav-parent { display: inline-block; vertical-align: middle; }
  .submenu-toggle {
    display: inline-block; background: none; border: 1px solid var(--line);
    border-radius: 6px; padding: 8px 12px; margin-left: 6px; cursor: pointer;
    color: var(--ink-soft); font-size: 14px; vertical-align: middle;
    transition: transform .2s;
  }
  .has-children.sub-open .submenu-toggle { transform: rotate(180deg); }
  .has-children .dropdown a { border-bottom: 1px dashed var(--line); padding: 10px 14px; }
  #petalCanvas { opacity: .32; }
}