/* ============================================================
   诗风侠影 · 共享设计系统
   依据《视觉规范 v2 · 暮色版画》落地为全站令牌（2026-08-17 换代）
   青绿系退出；旧变量名保留兼容，值已重映射至暮色阶梯
   ============================================================ */
:root {
  --paper: #F5F2EA;      /* 宣纸白 */
  --silk:  #EDE7D9;      /* 绢本米 */
  --ink:   #2B2B28;      /* 松烟墨 */
  --ink-2: #6E6E66;      /* 淡墨 */
  --mist:  #C9C7BC;      /* 雾灰 */
  /* 暮色阶梯（v2 新令牌） */
  --gold-2:  #C9A06C;    /* 泥金（圆日 / 市井任侠） */
  --camel:   #8B6B4F;    /* 驼棕（大地中景 / 豪侠交游） */
  --russet:  #6B4A3A;    /* 绛棕（大地近景 / 边塞报国） */
  --night:   #3A4450;    /* 墨蓝（仅第四幕深底） */
  --cinnabar: #B04A3A;   /* 朱砂（点睛专用） */
  /* 旧变量名 → 暮色阶梯（兼容映射，新代码请用上方令牌） */
  --green: #6E6E66;      /* 原石绿 → 淡墨（隐逸怀古） */
  --cyan:  #8B6B4F;      /* 原天水碧 → 驼棕（豪侠交游） */
  --blue:  #2B2B28;      /* 原黛蓝 → 松烟墨（侠义抒怀） */
  --blue-grey: #6E6E66;  /* 原远山蓝灰 → 淡墨 */
  --ochre: #6B4A3A;      /* 原赭石 → 绛棕（边塞报国） */
  --yellow: #C9A06C;     /* 原藤黄 → 泥金（市井任侠） */
  --gold:  #C9A06C;      /* 原泥金 → 泥金新值 */

  --font-title: "Ma Shan Zheng", "Noto Serif SC", "Songti SC", serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-label: "EB Garamond", "Noto Serif SC", serif;
  --font-body:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { background: var(--paper); }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 12%, rgba(139, 107, 79, .07), transparent 26rem),
    radial-gradient(circle at 85% 60%, rgba(201, 160, 108, .06), transparent 30rem),
    var(--paper);
  font-family: var(--font-body);
  line-height: 1.7;
}

/* 宣纸颗粒肌理（全站统一） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' seed='7'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { max-width: 100%; }
a { color: var(--blue); text-decoration: none; }

/* ---------- 章回导航 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  height: 60px;
  padding: 0 clamp(1rem, 4vw, 3rem);
  background: rgba(245, 242, 234, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(43, 43, 40, .12);
}
.site-nav .brand {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  width: 48px;
  height: 35px;
  margin-right: auto;
}
.site-nav .brand-logo {
  display: block;
  width: 48px;
  height: 35px;
  object-fit: contain;
}
.site-nav .chapters { display: flex; gap: .4rem; }
.site-nav .chapter {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: .15rem .55rem .3rem;
  cursor: pointer;
  color: var(--ink-2);
}
.site-nav .chapter .char {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.3;
}
.site-nav .chapter .fullname {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: .62rem;
  letter-spacing: .14em;
  color: var(--ink-2);
  opacity: 0;
  transition: opacity .25s ease;
  pointer-events: none;
}
.site-nav .chapter:hover .fullname,
.site-nav .chapter:focus-visible .fullname { opacity: 1; }
.site-nav .chapter[aria-current="page"] { color: var(--ink); }
.site-nav .chapter[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: -.1rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cinnabar);
}
.site-nav .chapter:hover { color: var(--ink); }

/* ---------- 幕题（回目式，全幕统一） ---------- */
.act-head {
  width: min(1060px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 3.2rem 0 2.2rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(1rem, 3vw, 2.4rem);
  align-items: end;
}
.act-head .act-no {
  writing-mode: vertical-rl;
  font-family: var(--font-label);
  font-size: .66rem;
  letter-spacing: .5em;
  color: var(--ochre);
  text-transform: uppercase;
}
.act-head h1 {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  letter-spacing: .16em;
  line-height: 1.1;
}
.act-head .act-sub {
  margin: .5rem 0 0;
  font-family: var(--font-body);
  color: var(--ink-2);
  font-size: .8rem;
  letter-spacing: .22em;
}
.act-head .act-question {
  max-width: 21rem;
  margin: 0 0 .2rem;
  font-family: var(--font-serif);
  font-size: .88rem;
  line-height: 1.9;
  color: var(--ink);
  border-left: 2px solid var(--cinnabar);
  padding-left: .8rem;
}
@media (max-width: 860px) {
  .act-head { grid-template-columns: auto 1fr; }
  .act-head .act-question { grid-column: 2; max-width: none; }
}

/* ---------- 幕尾钩子 ---------- */
.act-hook {
  width: min(1060px, calc(100% - 3rem));
  margin: 3.5rem auto 0;
  padding: 1.6rem 0 1.2rem;
  border-top: 1px solid rgba(43, 43, 40, .15);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.act-hook .hook-line {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink-2);
  letter-spacing: .06em;
}
.act-hook .hook-link {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--cinnabar);
  cursor: pointer;
  letter-spacing: .12em;
  white-space: nowrap;
}
.act-hook .hook-link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- 印章落款 ---------- */
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--cinnabar);
  border-radius: 4px;
  color: var(--cinnabar);
  font-family: var(--font-title);
  font-size: 1.15rem;
  letter-spacing: 0;
  opacity: .85;
  transform: rotate(-2deg);
  user-select: none;
}
.page-seal {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 90;
}

/* ---------- 通用信息卡 / tooltip ---------- */
.viz-tip {
  position: fixed;
  z-index: 200;
  max-width: 300px;
  padding: .7rem .85rem;
  background: rgba(237, 231, 217, .96);
  border: 1px solid rgba(43, 43, 40, .35);
  border-radius: 2px;
  box-shadow: 0 10px 30px rgba(43, 43, 40, .12);
  font-size: .78rem;
  line-height: 1.65;
  pointer-events: none;
  opacity: 0;
  transition: opacity .18s ease;
}
.viz-tip .tip-title { font-family: var(--font-serif); font-size: .95rem; margin-bottom: .2rem; }
.viz-tip .tip-meta { color: var(--ink-2); }

/* ---------- 题跋式图例 ---------- */
.colophon {
  font-family: var(--font-serif);
  font-size: .78rem;
  color: var(--ink-2);
  letter-spacing: .08em;
}

/* ---------- 数据说明标签 ---------- */
.data-tag {
  font-family: var(--font-label);
  font-size: .62rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--ochre);
}

/* ---------- 工具 ---------- */
[data-route] { cursor: pointer; }
[data-route]:focus-visible,
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.shared-loading, .shared-error {
  padding: 1rem;
  color: var(--ink-2);
  font-size: .85rem;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}