/* ============================================
   DOXA 学院通用入口样式（科学院 / 商学院）
   页面通过 :root 覆盖 --ac-* token 换肤
   ============================================ */

/* ---- 默认 token（中性纸感，页面可覆盖） ---- */
:root {
  --ac-ink: #23272E;
  --ac-ink-deep: #16191F;
  --ac-ink-soft: #EBEEF2;
  --ac-accent: #0F766E;
  --ac-accent-soft: #E0F0EE;
  --ac-accent-line: #AFD8D2;
  --ac-paper: #F6F7F4;
  --ac-paper-2: #EEF0EB;
  --ac-muted: #5E6672;
  --ac-line: #DFE3DC;
  --ac-line-strong: #C9CFC6;
  --ac-surface: #FFFFFF;
  --ac-shadow-sm: 0 1px 2px rgba(22, 25, 31, 0.04), 0 1px 3px rgba(22, 25, 31, 0.06);
  --ac-shadow-md: 0 4px 16px rgba(22, 25, 31, 0.08), 0 1px 3px rgba(22, 25, 31, 0.04);
  --ac-shadow-lg: 0 12px 40px rgba(15, 118, 110, 0.12), 0 2px 8px rgba(22, 25, 31, 0.04);
  --ac-radius: 12px;
  --ac-radius-pill: 999px;
  --ac-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ac-wide: 1080px;
}

/* ---- 页面底纹 ---- */
body:has(.ac-hub) {
  background-color: var(--ac-paper);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, color-mix(in srgb, var(--ac-accent) 6%, transparent), transparent 55%),
    linear-gradient(var(--ac-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ac-line) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  background-attachment: fixed;
}

/* ---- 导航 ---- */
body:has(.ac-hub) .site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  background: color-mix(in srgb, var(--ac-paper) 88%, transparent);
  border-bottom: 1px solid var(--ac-line);
}

body:has(.ac-hub) .nav-actions {
  flex-wrap: wrap;
  gap: 6px 14px;
  justify-content: flex-end;
}

body:has(.ac-hub) .nav-link {
  position: relative;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ac-muted);
  text-decoration: none;
  padding: 4px 2px;
  transition: color 0.15s var(--ac-ease);
}

body:has(.ac-hub) .nav-link:hover {
  color: var(--ac-ink);
}

body:has(.ac-hub) .nav-link.is-active {
  color: var(--ac-accent);
  font-weight: 600;
}

body:has(.ac-hub) .nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--ac-accent);
  border-radius: 1px;
}

/* ---- 二级导航 ---- */
.ac-subnav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 24px;
  overflow-x: auto;
  background: rgba(255, 255, 255, 0.6);
  border-bottom: 1px solid var(--ac-line);
  scrollbar-width: none;
}

.ac-subnav::-webkit-scrollbar {
  display: none;
}

.ac-subnav .as-label {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ac-accent);
  margin-right: 8px;
  white-space: nowrap;
}

.ac-subnav a {
  font-size: 0.88rem;
  color: var(--ac-muted);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--ac-radius-pill);
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.ac-subnav a:hover {
  background: var(--ac-ink-soft);
  color: var(--ac-ink);
}

.ac-subnav a.is-active {
  background: var(--ac-accent-soft);
  color: var(--ac-accent);
  font-weight: 600;
}

body:has(.ac-hub) .container {
  max-width: var(--ac-wide);
}

/* ---- 入口 hero ---- */
.ac-hub-hero {
  position: relative;
  padding: 64px 24px 52px;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, color-mix(in srgb, var(--ac-accent) 8%, transparent), transparent 60%),
    linear-gradient(180deg, var(--ac-ink-soft) 0%, var(--ac-paper) 100%);
  border-bottom: 1px solid var(--ac-line);
}

.ac-hub-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ac-ink), var(--ac-accent), var(--ac-accent-2, #5B7CFF));
}

.ac-hub-hero .hub-mark {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: var(--ac-ink);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  box-shadow: var(--ac-shadow-md);
}

.ac-hub-hero .eyebrow {
  display: inline-flex;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ac-accent);
  margin-bottom: 14px;
  padding: 5px 14px;
  background: var(--ac-accent-soft);
  border: 1px solid var(--ac-accent-line);
  border-radius: var(--ac-radius-pill);
}

.ac-hub-hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.ac-hub-hero .lead {
  color: var(--ac-muted);
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.08rem;
  line-height: 1.7;
}

.ac-hub-hero .lead strong {
  color: var(--ac-accent);
}

/* hub 卡片（共用结构类） */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin: 40px 0 48px;
}

.hub-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  background: var(--ac-surface);
  border: 1px solid var(--ac-line);
  border-radius: var(--ac-radius);
  padding: 24px 22px;
  box-shadow: var(--ac-shadow-sm);
  transition: transform 0.2s var(--ac-ease), box-shadow 0.2s var(--ac-ease), border-color 0.2s;
  position: relative;
  overflow: hidden;
  min-height: 180px;
}

.hub-card.is-planned { cursor: default; }
.hub-card.is-planned:hover { transform: none; box-shadow: none; border-color: var(--ac-line, var(--doxa-line)); }

.hub-card::after {
  content: "→";
  position: absolute;
  right: 20px;
  bottom: 18px;
  font-size: 1.1rem;
  color: var(--ac-accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.2s, transform 0.2s var(--ac-ease);
}

.hub-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ac-shadow-lg);
  border-color: var(--ac-line-strong);
}

.hub-card:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.hub-card .hub-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 14px;
  background: var(--ac-ink-soft);
  color: var(--ac-ink);
  font-weight: 700;
  font-family: var(--font-serif);
}

.hub-card.featured .hub-icon {
  background: var(--ac-accent-soft);
  color: var(--ac-accent);
}

.hub-card h2 {
  font-size: 1.2rem;
  margin: 0 0 8px;
  color: var(--ac-ink);
}

.hub-card p {
  margin: 0;
  color: var(--ac-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
}

.hub-card .hub-meta {
  margin-top: 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ac-accent);
  letter-spacing: 0.02em;
}

.hub-note {
  text-align: center;
  color: var(--ac-muted);
  font-size: 0.9rem;
  margin: 0 0 56px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.65;
}

/* ---- 响应式 ---- */
@media (max-width: 640px) {
  .hub-grid {
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .ac-hub-hero {
    padding: 48px 20px 40px;
  }

  .ac-subnav {
    padding: 8px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hub-card {
    transition: none;
  }
  .hub-card:hover {
    transform: none;
  }
}

/* ---- 单栏导航：有 ac-subnav 时隐藏站点顶栏 ---- */
body:has(.ac-subnav) .site-nav {
  display: none !important;
}
.ac-subnav {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 48px;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--ac-paper) 94%, transparent);
  backdrop-filter: blur(12px) saturate(1.15);
  -webkit-backdrop-filter: blur(12px) saturate(1.15);
  border-bottom: 1px solid var(--ac-line);
}
.ac-subnav .as-brand {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ac-ink);
  text-decoration: none;
  padding: 4px 10px 4px 0;
  margin-right: 4px;
  border-right: 1px solid var(--ac-line);
  border-radius: 0;
  white-space: nowrap;
}
.ac-subnav .as-brand:hover {
  background: transparent;
  color: var(--ac-accent);
}

/* ============================================
   DOXA Academy surface · unified 2026-08-09
   One global nav; local context lives in the page.
   ============================================ */
body.faculty-page {
  --faculty-accent: #15986a;
  --faculty-accent-soft: #e8f5ef;
  --faculty-paper: #fbfaf7;
  --faculty-ink: #17191f;
  --faculty-muted: #626771;
  --faculty-line: #e6e4dd;
  background: var(--faculty-paper) !important;
  background-image: none !important;
  color: var(--faculty-ink);
}

body.faculty-page .site-nav { background: rgba(255,255,255,.96); border-bottom-color: var(--faculty-line); }
.faculty-hero { border-bottom: 1px solid var(--faculty-line); background: #fff; }
.faculty-hero-inner, .faculty-main { width: min(100% - 48px, 1180px); margin-inline: auto; }
.faculty-hero-inner { padding: 62px 0 54px; }
.faculty-kicker { margin: 0 0 16px; color: var(--faculty-accent); font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.faculty-hero h1 { max-width: 720px; margin: 0 0 16px; color: var(--doxa-indigo); font-size: clamp(2.25rem, 5vw, 4rem); letter-spacing: -.045em; }
.faculty-lead { max-width: 660px; margin: 0; color: var(--faculty-muted); font-size: 1.05rem; line-height: 1.85; }
.faculty-lead strong { color: var(--faculty-accent); }
.faculty-context, .faculty-tabs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 26px; color: var(--doxa-gray); font-size: .78rem; }
.faculty-context a, .faculty-tabs a { color: var(--doxa-gray); text-decoration: none; }
.faculty-context a:hover, .faculty-tabs a:hover { color: var(--doxa-indigo); }
.faculty-context .current, .faculty-tabs .is-active { color: var(--doxa-indigo); font-weight: 700; }
.faculty-context .separator { color: #b5b8bf; }
.faculty-tabs { gap: 0; padding-top: 14px; border-top: 1px solid var(--faculty-line); }
.faculty-tabs a { padding: 0 14px; border-left: 1px solid var(--faculty-line); }
.faculty-tabs a:first-child { padding-left: 0; border-left: 0; }
.faculty-main { padding: 42px 0 64px; }
.faculty-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.faculty-section-heading h2 { margin: 0; color: var(--faculty-ink); font-size: clamp(1.5rem, 3vw, 2rem); }
.faculty-section-heading p { margin: 0; color: var(--faculty-muted); font-size: .84rem; }
.faculty-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.faculty-card { display: flex; min-height: 214px; flex-direction: column; padding: 22px; color: inherit; text-decoration: none; background: #fff; border: 1px solid var(--faculty-line); border-radius: 6px; transition: border-color .16s, box-shadow .16s, transform .16s var(--ease); }
.faculty-card:hover { color: inherit; border-color: color-mix(in srgb, var(--faculty-accent) 35%, var(--faculty-line)); box-shadow: 0 10px 24px rgba(20,22,31,.07); transform: translateY(-2px); }
.faculty-card.is-planned { cursor: default; }
.faculty-card.is-planned:hover { transform: none; box-shadow: none; }
.faculty-card-mark { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; margin-bottom: 22px; color: var(--faculty-accent); font-family: var(--font-serif); font-size: 1.05rem; font-weight: 700; background: var(--faculty-accent-soft); border-radius: 5px; }
.faculty-card h3 { margin: 0 0 8px; color: var(--faculty-ink); font-size: 1.15rem; }
.faculty-card p { flex: 1; margin: 0; color: var(--faculty-muted); font-size: .88rem; line-height: 1.7; }
.faculty-card-meta { margin-top: 18px; color: var(--faculty-accent); font-size: .75rem; font-weight: 700; }
.faculty-card.is-planned .faculty-card-mark { color: #757a83; background: #f2f1ed; }
.faculty-card.is-planned .faculty-card-meta { color: #858993; }
.faculty-note { max-width: 700px; margin: 28px 0 0; padding-top: 18px; color: var(--faculty-muted); font-size: .84rem; border-top: 1px solid var(--faculty-line); }
body.faculty-page .site-footer { margin-top: 0; background: var(--doxa-indigo); }
body.faculty-page .site-footer .footer-inner { max-width: 1180px; }

@media (max-width: 820px) {
  .faculty-hero-inner, .faculty-main { width: min(100% - 32px, 1180px); }
  .faculty-hero-inner { padding: 44px 0 38px; }
  .faculty-main { padding: 32px 0 48px; }
  .faculty-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .faculty-grid { grid-template-columns: 1fr; }
  .faculty-section-heading { display: block; }
  .faculty-section-heading p { margin-top: 6px; }
}

/* ============================================
   学院知识图谱（map.html · 通用）
   结构参照数学版面 map.html（app/math/map.html）
   tag 四色：地基灰 / 主干=学院主题色 / 深入深色 / 走向验证绿
   ============================================ */
.map-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin: 14px 0 18px;
  color: var(--faculty-muted);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
}

.map-flow .arrow {
  font-size: 1.25rem;
  color: var(--doxa-verified);
  line-height: 1;
  letter-spacing: 0;
}

.map-layer {
  background: #fff;
  border: 1px solid var(--faculty-line);
  border-radius: 8px;
  padding: 22px 24px;
  margin-bottom: 0;
  box-shadow: var(--doxa-shadow-sm);
  transition: box-shadow 0.2s var(--ease);
}

.map-layer:hover { box-shadow: var(--doxa-shadow); }

.map-layer h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--faculty-ink);
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.map-layer h3 .tag {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 4px;
  color: #fff;
}

.map-layer .tag-foundation { background: #5A5E70; }
.map-layer .tag-core { background: var(--faculty-accent); }
.map-layer .tag-advanced { background: #7C2D20; }
.map-layer .tag-app { background: var(--doxa-verified); }

.map-layer .desc {
  color: var(--faculty-muted);
  font-size: 0.88rem;
  margin: 0 0 14px;
  line-height: 1.6;
}

.map-chips {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}

.map-chip {
  border: 1px solid var(--faculty-line);
  border-radius: 6px;
  padding: 12px 14px;
  background: #fff;
  transition: border-color 0.15s, transform 0.15s var(--ease), box-shadow 0.15s;
  box-shadow: var(--doxa-shadow-sm);
}

.map-chip:hover {
  border-color: var(--faculty-line-strong, #c9cfc6);
  transform: translateY(-1px);
}

.map-chip .t {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--faculty-ink);
}

.map-chip .s {
  font-size: 0.78rem;
  color: var(--faculty-muted);
  margin-top: 4px;
  line-height: 1.5;
}

.map-app {
  border: 1px solid var(--faculty-line);
  border-radius: 6px;
  padding: 14px 16px;
  background: #fff;
  box-shadow: var(--doxa-shadow-sm);
}

.map-app .t { font-weight: 600; font-size: 0.95rem; color: var(--faculty-ink); }
.map-app .deps { margin-top: 8px; }

.map-app .deps span {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--faculty-muted);
  background: #fff;
  border: 1px solid var(--faculty-line);
  border-radius: 999px;
  padding: 2px 9px;
  margin: 2px 4px 0 0;
}

.map-route {
  margin-top: 36px;
  border: 1px solid var(--faculty-line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
  box-shadow: var(--doxa-shadow-sm);
}

.map-route h3 {
  font-family: var(--font-serif);
  color: var(--faculty-ink);
  margin: 0 0 16px;
  font-size: 1.2rem;
}

.map-route table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.map-route th {
  text-align: left;
  padding: 10px 12px;
  background: var(--faculty-accent);
  color: #fff;
  font-size: 0.8rem;
}

.map-route td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--faculty-line);
  background: #fff;
}

.map-route td:first-child { font-weight: 600; color: var(--faculty-ink); }

@media (max-width: 520px) {
  .map-chips { grid-template-columns: 1fr 1fr; }
}

/* ============================================
   学院知识图谱 · 知识卡（map.html 展开式节点）
   原则：一句话定义 + 精炼要点 + 学习/关联链接
   ============================================ */
.map-nodes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.map-node {
  border: 1px solid var(--faculty-line);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
  transition: border-color 0.15s;
}

.map-node summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 650;
  font-size: 0.95rem;
  color: var(--faculty-ink);
  list-style: none;
}

.map-node summary::-webkit-details-marker { display: none; }
.map-node summary::before {
  content: '▸';
  color: var(--faculty-accent);
  font-size: 0.8rem;
  transition: transform 0.15s;
}
.map-node[open] summary::before { transform: rotate(90deg); }

.map-node summary .node-tag {
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 3px;
  color: #fff;
  background: var(--faculty-accent);
  white-space: nowrap;
}

.map-node[open] {
  border-color: color-mix(in srgb, var(--faculty-accent) 40%, var(--faculty-line));
}

.node-body { padding: 0 16px 14px 32px; }
.node-def { margin: 0 0 8px; font-size: 0.88rem; color: var(--faculty-ink); line-height: 1.7; }
.node-def strong { color: var(--faculty-accent); }

.node-pts { margin: 0 0 10px; padding-left: 0; list-style: none; }
.node-pts li {
  font-size: 0.84rem;
  color: var(--faculty-muted);
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}
.node-pts li::before { content: '·'; position: absolute; left: 2px; color: var(--faculty-accent); font-weight: 700; }
.node-pts b { color: var(--faculty-ink); font-weight: 650; }

.node-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding-top: 8px;
  border-top: 1px dashed var(--faculty-line);
}
.node-links .nl-label { font-size: 0.72rem; color: var(--faculty-muted); font-weight: 700; }
.node-links a { font-size: 0.78rem; color: var(--faculty-accent); text-decoration: none; font-weight: 650; }
.node-links a:hover { text-decoration: underline; }

.map-route { margin-top: 36px; }
.map-route .route-link { color: var(--faculty-accent); text-decoration: underline; }