/* ============================================
   theme-classical.css — 古朴典雅主题层
   加载于全部页面 CSS 之后，统一重塑站点气质：
   宣纸纹理 · 水墨设色 · 朱砂印章 · 云纹回纹 · 线装书卷
   仅做视觉覆盖，不改动原有布局结构。
   ============================================ */

:root {
  /* === 雅致设色（覆写原国风配色，更趋古朴） === */
  --color-vermillion: #9B2D20;        /* 朱砂 — 主印/重点 */
  --color-vermillion-light: #C2573F;
  --color-vermillion-dark: #6E1E16;
  --color-ink-black: #2B2620;         /* 墨色 — 正文 */
  --color-ink-deep: #1C1814;          /* 重墨 — 标题 */
  --color-gold: #B08D4F;              /* 赭金 — 边框/强调 */
  --color-gold-light: #E4D4AE;        /* 浅金 — 卡片底/分隔 */
  --color-gold-dark: #8A6D33;         /* 深金 */
  --color-parchment: #F3EAD6;         /* 宣纸 — 页面底 */
  --color-parchment-dark: #E9DCC0;    /* 陈纸 — 区块底 */
  --color-jade: #4E6B57;              /* 黛绿 — 正面 */
  --color-indigo: #3F5A6B;            /* 黛青 — 链接 */
  --color-stone: #8A7E6A;             /* 暖石灰 — 次要文字 */
  --color-mist: #D8CBB0;              /* 雾色 — 边框 */

  /* 关系图谱语义色（古朴化） */
  --color-master: #4E6B57;
  --color-disciple: #3F5A6B;
  --color-brother: #B08D4F;
  --color-rival: #9B2D20;
  --color-subordinate: #8A7E6A;
  --color-node-protagonist: #9B2D20;
  --color-node-immortal: #B08D4F;
  --color-node-demon: #7A5230;
  --color-node-buddha: #8A6D33;
  --color-node-mortal: #4E6B57;
}

/* === 宣纸纹理 + 暖色晕染（全局） === */
body {
  background-color: var(--color-parchment);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(176, 141, 79, 0.05) 0%, transparent 42%),
    radial-gradient(circle at 88% 82%, rgba(155, 45, 32, 0.04) 0%, transparent 45%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E");
  color: var(--color-ink-black);
}

/* 正文用宋/楷书韵味更浓 */
body, p, li, td, .char-summary, .chapter-card > p, .route-desc, .art-summary, .loc-summary {
  font-family: var(--font-body);
}
h1, h2, h3, h4, h5, h6,
.hero-title, .section-title span, .detail-title-row h1,
.char-card h4, .chapter-card h4, .route-card h4, .artifact-card h4, .loc-card h4,
.cn-number, .stat-card .stat-num, .chapter-num, .rank-number {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

/* === 标题装饰：朱砂竖印 + 回纹下边 === */
.section-title {
  border-bottom: none;
  padding-bottom: 0;
}
.section-title::before {
  content: "";
  width: 6px;
  height: 1.4em;
  margin-right: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--color-vermillion), var(--color-vermillion-dark));
  box-shadow: 0 0 0 2px rgba(155, 45, 32, 0.12);
  align-self: center;
  flex-shrink: 0;
}
.section-title span {
  position: relative;
  padding-bottom: 6px;
}
.section-title span::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--color-vermillion) 0%,
    var(--color-gold) 45%,
    var(--color-gold-light) 100%);
  border-radius: 2px;
}

/* === 卡片 — 线装书页：双层金框 + 纸感 === */
.card, .char-card, .chapter-card, .route-card, .artifact-card, .quote-card, .loc-card,
.cat-card, .stat-card, .filter-tag, .search-box, .ref-link, .chapter-tag, .alias-tag,
.attr-card, .graph-container, .route-map-container, .chart-container, .detail-summary,
.quote-list li, .result-card, .search-result-card {
  background: linear-gradient(180deg, #F7F0DF 0%, var(--color-parchment) 100%);
  border: 1px solid var(--color-gold-light);
  box-shadow: inset 0 0 0 3px rgba(247, 240, 223, 0.9),
              inset 0 0 0 4px rgba(176, 141, 79, 0.28),
              0 2px 10px rgba(43, 38, 32, 0.07);
}
.char-card, .chapter-card, .route-card, .artifact-card, .quote-card, .loc-card,
.cat-card, .stat-card {
  border-radius: var(--radius-md);
  position: relative;
}
/* 书页四角云纹角标（左上/右下） */
.char-card::after, .cat-card::after, .artifact-card::after, .route-card::after {
  content: "";
  position: absolute;
  right: 8px; bottom: 8px;
  width: 14px; height: 14px;
  border-right: 1.5px solid rgba(155, 45, 32, 0.35);
  border-bottom: 1.5px solid rgba(155, 45, 32, 0.35);
  border-bottom-right-radius: 6px;
  pointer-events: none;
}
.char-card::before, .cat-card::before, .artifact-card::before, .route-card::before {
  content: "";
  position: absolute;
  left: 8px; top: 8px;
  width: 14px; height: 14px;
  border-left: 1.5px solid rgba(176, 141, 79, 0.4);
  border-top: 1.5px solid rgba(176, 141, 79, 0.4);
  border-top-left-radius: 6px;
  pointer-events: none;
}

/* 卡片悬停：印泥晕开 */
.char-card:hover, .chapter-card:hover, .route-card:hover, .artifact-card:hover,
.quote-card:hover, .loc-card:hover, .cat-card:hover, .stat-card:hover {
  border-color: var(--color-gold);
  box-shadow: inset 0 0 0 3px rgba(247, 240, 223, 0.9),
              inset 0 0 0 4px rgba(155, 45, 32, 0.35),
              0 6px 18px rgba(155, 45, 32, 0.12);
  transform: translateY(-3px);
}

/* === 印章风按钮 / 标签 === */
.btn-primary {
  background: var(--color-vermillion);
  color: #F7F0DF;
  border: 1px solid var(--color-vermillion-dark);
  box-shadow: 0 2px 0 var(--color-vermillion-dark), 0 4px 12px rgba(155, 45, 32, 0.18);
}
.btn-primary:hover { background: var(--color-vermillion-dark); transform: translateY(1px); }
.btn-outline { border-color: var(--color-gold); color: var(--color-gold-dark); }
.btn-outline:hover { background: var(--color-gold); color: #F7F0DF; }

.tag-seal, .seal-tag {
  color: var(--color-vermillion);
  border: 1.5px solid var(--color-vermillion);
  background: rgba(155, 45, 32, 0.05);
  transform: rotate(-2deg);
  font-family: var(--font-display);
}

/* === 页眉 — 装裱横批 + 云纹顶边 === */
.site-header {
  background: rgba(243, 234, 214, 0.92);
  border-bottom: 1px solid var(--color-gold-light);
  box-shadow: 0 2px 0 rgba(176, 141, 79, 0.25), 0 4px 16px rgba(43, 38, 32, 0.08);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg,
    var(--color-vermillion) 0 14px, transparent 14px 28px);
  opacity: 0.55;
}
.logo, .logo-text, .nav-link.active { color: var(--color-vermillion); }
.nav-link.active::after { background: var(--color-vermillion); }

/* === 首屏 — 远山水墨意境 === */
.hero {
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(176,141,79,0.10), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='300' viewBox='0 0 1200 300'%3E%3Cpath d='M0 260 Q150 200 300 240 T600 230 Q760 180 900 235 T1200 220 V300 H0 Z' fill='%238A7E6A' opacity='0.10'/%3E%3Cpath d='M0 285 Q200 245 400 275 T800 270 Q1000 240 1200 275 V300 H0 Z' fill='%233F5A6B' opacity='0.10'/%3E%3C/svg%3E") no-repeat center bottom / cover;
  border-bottom: 1px solid var(--color-gold-light);
}
.hero-title { text-shadow: 0 1px 0 rgba(247,240,223,0.8); }

/* === 页脚 — 碑拓质感 === */
.site-footer {
  background: linear-gradient(180deg, #241f18, #1C1814);
  border-top: 3px solid var(--color-gold);
}
.site-footer .footer-col h4, .site-footer .footer-brand h3 { color: var(--color-gold); }

/* === 区块分隔线（回纹） === */
hr, .divider-ink {
  background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-vermillion), var(--color-gold), transparent);
  height: 2px;
  border: none;
}

/* === 详情页引用条 === */
.detail-summary {
  border-left: 4px solid var(--color-vermillion);
  background: linear-gradient(135deg, rgba(176,141,79,0.12), rgba(243,234,214,0.6));
  font-family: var(--font-display);
}

/* === 关系标签雅化 === */
.relation-up { color: var(--color-master); background: rgba(78,107,87,0.12); }
.relation-down { color: var(--color-disciple); background: rgba(63,90,107,0.12); }
.relation-peer { color: var(--color-gold-dark); background: rgba(176,141,79,0.16); }
.relation-rival { color: var(--color-vermillion); background: rgba(155,45,32,0.10); }

/* === 桌面端：整页装裱外框 === */
@media (min-width: 1024px) {
  .main-content {
    border-left: 1px solid rgba(176,141,79,0.18);
    border-right: 1px solid rgba(176,141,79,0.18);
  }
}

/* === 滚动条雅化 === */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-parchment-dark); }
::-webkit-scrollbar-thumb {
  background: var(--color-gold);
  border-radius: 6px;
  border: 2px solid var(--color-parchment-dark);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-gold-dark); }

/* === 进入动画（淡墨） === */
.fade-in { animation: inkFade 0.5s ease both; }
@keyframes inkFade {
  from { opacity: 0; transform: translateY(12px); filter: blur(2px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* === 新栏目页面通用容器（古朴） === */
.explore-wrap { max-width: var(--max-width); margin: 0 auto; }
.explore-hero {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
  position: relative;
}
.explore-hero .eh-seal {
  display: inline-block;
  font-family: var(--font-display);
  color: #F7F0DF;
  background: var(--color-vermillion);
  padding: 6px 14px;
  border-radius: 4px;
  letter-spacing: 0.3em;
  font-size: var(--text-sm);
  box-shadow: 0 2px 0 var(--color-vermillion-dark);
  transform: rotate(-1.5deg);
  margin-bottom: var(--space-md);
}
.explore-hero h1 {
  font-size: var(--text-4xl);
  color: var(--color-ink-deep);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-sm);
}
.explore-hero p { color: var(--color-stone); max-width: 640px; margin: 0 auto; line-height: 1.8; }

/* 标签切换（图谱/图表/测试） */
.tab-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}
.tab-btn {
  font-family: var(--font-display);
  font-size: var(--text-base);
  padding: var(--space-sm) var(--space-xl);
  border: 1px solid var(--color-gold-light);
  background: var(--color-parchment);
  color: var(--color-ink-black);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}
.tab-btn:hover { border-color: var(--color-gold); }
.tab-btn.active {
  background: var(--color-vermillion);
  color: #F7F0DF;
  border-color: var(--color-vermillion-dark);
  box-shadow: 0 2px 0 var(--color-vermillion-dark);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: inkFade 0.4s ease both; }

/* 图例 */
.legend-row { display: flex; flex-wrap: wrap; gap: var(--space-md); justify-content: center; margin-top: var(--space-md); }
.legend-item { display: inline-flex; align-items: center; gap: var(--space-xs); font-size: var(--text-sm); color: var(--color-ink-black); }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; }

/* === 首页「研习西游」入口（测试 / 图谱 / 图表） === */
.section-intro {
  text-align: center;
  color: var(--color-stone);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  line-height: 1.9;
  font-family: var(--font-body);
}
.study-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.study-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-md);
  position: relative;
  background: linear-gradient(180deg, #F7F0DF 0%, var(--color-parchment) 100%);
  border: 1px solid var(--color-gold-light);
  box-shadow: inset 0 0 0 3px rgba(247,240,223,0.9),
              inset 0 0 0 4px rgba(176,141,79,0.28),
              0 2px 10px rgba(43,38,32,0.07);
  transition: all var(--transition-normal);
}
.study-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-gold);
  box-shadow: inset 0 0 0 3px rgba(247,240,223,0.9),
              inset 0 0 0 4px rgba(155,45,32,0.35),
              0 6px 18px rgba(155,45,32,0.12);
}
.study-icon {
  flex-shrink: 0;
  width: 54px; height: 54px;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: #F7F0DF;
  background: var(--color-vermillion);
  border-radius: 8px;
  box-shadow: 0 2px 0 var(--color-vermillion-dark);
  transform: rotate(-2deg);
}
.study-info { flex: 1; min-width: 0; }
.study-info h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--color-ink-deep); margin-bottom: 4px; letter-spacing: 0.04em; }
.study-info p { font-size: var(--text-sm); color: var(--color-stone); line-height: 1.7; }
.study-arrow { color: var(--color-gold); font-size: 1.4rem; flex-shrink: 0; transition: transform var(--transition-normal); }
.study-card:hover .study-arrow { transform: translateX(4px); }
@media (max-width: 760px) { .study-grid { grid-template-columns: 1fr; } }