/* ============================================================
   web.css · T02 公共样式（基于 demo/index_v4a_song.html:27-65 抽出）
   ============================================================
   国风水墨风 · 宣纸底色 + 朱砂红 + 墨黑文字
   复用 demo v4a 的 CSS 变量名和值，4 个 web/ 页面共用
   ============================================================ */

:root {
  /* 宣纸色系 */
  --paper:#ECE2BE;
  --paper-warm:#F1E8C8;
  --paper-card:#F9F2DA;
  --paper-deep:#D9CC9F;

  /* 墨色系 */
  --ink:#1E252C;
  --ink-soft:#3C5260;
  --ink-faint:#8A9CA8;

  /* 朱砂 */
  --cinnabar:#B83A2E;
  --cinnabar-soft:#EBD4CD;

  /* 青绿 */
  --qinglv:#5D8266;
  --qinglv-soft:#DAE5DA;

  /* 字体 */
  --font-kai:'LXGW WenKai','STKaiti','KaiTi',serif;
  --font-song:'LXGW WenKai','STSong','SimSun',serif;
  --font-mono:'SF Mono','Consolas',monospace;
}

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

html, body {
  font-family: var(--font-kai);
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  line-height: 1.6;
}

body {
  background-image:
    radial-gradient(circle at 20% 30%, rgba(120,100,70,.08) 0 1px, transparent 2px),
    radial-gradient(circle at 70% 60%, rgba(120,100,70,.06) 0 1px, transparent 2px),
    radial-gradient(circle at 40% 80%, rgba(120,100,70,.07) 0 1px, transparent 2px);
  background-size: 13px 13px, 17px 17px, 11px 11px;
}

a { color: var(--cinnabar); text-decoration: none; }
a:hover { color: #9c2c20; }

/* ===== 顶栏 ===== */
.topbar {
  background: var(--paper-card);
  border-bottom: 1px solid rgba(60,82,96,.12);
  padding: 16px 32px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(60,82,96,.05);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  font-size: 22px;
  font-weight: bold;
  color: var(--cinnabar);
  text-decoration: none;
  letter-spacing: 2px;
  white-space: nowrap;
}
.brand:hover { color: var(--cinnabar); }

/* 路由重构 · 顶栏 nav-link 样式（ARCH §4.4 · PRD §4.3）*/
.nav {
  display: flex;
  gap: 24px;
  flex: 1;
}
.nav-link {
  font-family: var(--font-kai);
  font-size: 15px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 8px 4px;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--ink); }
.nav-link.active {
  color: var(--ink);
  font-weight: 500;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--cinnabar);
}
.search-box {
  display: flex;
  gap: 4px;
}

/* 路由重构 · 填字页 "← 返回首页" 按钮（ARCH §6）*/
.title-back {
  font-family: var(--font-kai);
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.title-back:hover {
  background: rgba(184, 58, 46, 0.08);
  color: var(--cinnabar);
}

/* 路由重构 · 填字页静态品牌（避免和返回按钮视觉冲突）*/
.brand-static {
  cursor: default;
  color: var(--cinnabar);
}
.search-box input {
  padding: 8px 14px;
  border: 1px solid var(--paper-deep);
  background: var(--paper);
  border-radius: 20px;
  font-family: var(--font-kai);
  font-size: 14px;
  outline: none;
  width: 180px;
  transition: width 0.3s;
  color: var(--ink);
}
.search-box input:focus { width: 220px; border-color: var(--cinnabar); }
.search-box button {
  padding: 8px 18px;
  background: var(--cinnabar);
  color: var(--paper);
  border: none;
  border-radius: 20px;
  font-family: var(--font-kai);
  cursor: pointer;
  font-size: 14px;
}
.search-box button:hover { background: #9c2c20; }

/* ===== 主内容容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px;
}

/* ===== 通用组件 ===== */
.section { margin-bottom: 48px; }
.section-title {
  font-size: 24px;
  color: var(--ink);
  margin-bottom: 16px;
  border-left: 4px solid var(--cinnabar);
  padding-left: 12px;
}
.section-subtitle {
  font-size: 14px;
  color: var(--ink-faint);
  margin-bottom: 20px;
  margin-left: 16px;
}

/* ===== 卡片 ===== */
.card {
  background: var(--paper-card);
  border: 1px solid rgba(60,82,96,.1);
  border-radius: 8px;
  padding: 20px;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: var(--ink);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(60,82,96,.12);
  border-color: var(--cinnabar-soft);
  color: var(--ink);
}
.card-title {
  font-size: 18px;
  font-weight: bold;
  color: var(--ink);
  margin-bottom: 4px;
}
.card-meta {
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 12px;
}
.card-excerpt {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* ===== 网格 ===== */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 20px;
  font-family: var(--font-kai);
  font-size: 15px;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.2s;
  text-align: center;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--cinnabar);
  color: var(--paper);
}
.btn-primary:hover { background: #9c2c20; color: var(--paper); }
.btn-secondary {
  background: var(--qinglv-soft);
  color: var(--qinglv);
  border: 1px solid var(--qinglv);
}
.btn-secondary:hover { background: var(--qinglv); color: var(--paper); }
.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--paper-deep);
}
.btn-ghost:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

/* ===== 筛选条 ===== */
.filter-bar {
  background: var(--paper-card);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.filter-group label {
  font-size: 14px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.filter-group select, .filter-group input {
  padding: 6px 12px;
  border: 1px solid var(--paper-deep);
  background: var(--paper);
  border-radius: 16px;
  font-family: var(--font-kai);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  min-width: 100px;
}
.filter-group select:focus, .filter-group input:focus {
  border-color: var(--cinnabar);
}

/* ===== 列表 ===== */
.poem-list { display: flex; flex-direction: column; gap: 12px; }
.poem-row {
  background: var(--paper-card);
  border: 1px solid rgba(60,82,96,.08);
  border-radius: 8px;
  padding: 16px 20px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
}
.poem-row:hover {
  border-color: var(--cinnabar-soft);
  background: var(--paper-warm);
  color: var(--ink);
  transform: translateX(4px);
}
.poem-row-info { flex: 1; min-width: 0; }
.poem-row-title {
  font-size: 16px;
  color: var(--ink);
  font-weight: bold;
  margin-bottom: 4px;
}
.poem-row-meta {
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 8px;
}
.poem-row-text {
  font-size: 14px;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.poem-row-arrow { color: var(--cinnabar); font-size: 20px; flex-shrink: 0; }

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 32px 0;
  flex-wrap: wrap;
}
.pagination button {
  padding: 8px 14px;
  background: var(--paper-card);
  border: 1px solid var(--paper-deep);
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-kai);
  color: var(--ink-soft);
  font-size: 14px;
  min-width: 38px;
}
.pagination button:hover:not(:disabled) {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}
.pagination button.active {
  background: var(--cinnabar);
  color: var(--paper);
  border-color: var(--cinnabar);
}
.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ===== 名句轮播 (hero) ===== */
.hero {
  background: linear-gradient(135deg, var(--paper-warm), var(--paper-card));
  padding: 60px 40px;
  border-radius: 12px;
  text-align: center;
  margin-bottom: 48px;
  border: 1px solid var(--paper-deep);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: background 0.6s;
}
.hero-text {
  font-size: 32px;
  color: var(--ink);
  margin-bottom: 16px;
  font-family: var(--font-kai);
  line-height: 1.5;
  letter-spacing: 2px;
  min-height: 50px;
  animation: fadein 1s ease;
}
@keyframes fadein {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-meta {
  font-size: 16px;
  color: var(--ink-faint);
  letter-spacing: 4px;
}

/* ===== 详情页 ===== */
.poem-detail {
  max-width: 760px;
  margin: 0 auto;
  background: var(--paper-card);
  padding: 48px 56px;
  border-radius: 12px;
  border: 1px solid var(--paper-deep);
  box-shadow: 0 2px 12px rgba(60,82,96,.06);
}
.poem-detail-title {
  font-size: 36px;
  color: var(--cinnabar);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 4px;
}
.poem-detail-author {
  text-align: center;
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}
.poem-detail-bio {
  font-size: 14px;
  color: var(--ink-faint);
  padding: 12px 24px;
  background: var(--paper-warm);
  border-radius: 6px;
  margin-bottom: 32px;
  line-height: 1.8;
  text-align: center;
}
.poem-detail-text {
  font-size: 22px;
  line-height: 2.2;
  color: var(--ink);
  text-align: center;
  margin-bottom: 32px;
  letter-spacing: 2px;
  white-space: pre-line;
}
.poem-detail-translation {
  background: var(--qinglv-soft);
  border-left: 4px solid var(--qinglv);
  padding: 20px 24px;
  margin-bottom: 32px;
  border-radius: 4px;
  color: var(--ink-soft);
  line-height: 1.9;
  font-size: 15px;
}
.poem-detail-translation-title {
  font-weight: bold;
  color: var(--qinglv);
  margin-bottom: 8px;
  font-size: 16px;
}
.poem-detail-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* ===== 搜索结果 ===== */
.search-header {
  background: var(--paper-card);
  padding: 24px;
  border-radius: 8px;
  margin-bottom: 24px;
  text-align: center;
  border: 1px solid var(--paper-deep);
}
.search-header h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 16px;
}
.search-header h2 em {
  color: var(--cinnabar);
  font-style: normal;
  font-weight: bold;
  background: var(--paper-warm);
  padding: 0 8px;
  border-radius: 4px;
}
.search-input-big {
  display: flex;
  gap: 8px;
  max-width: 500px;
  margin: 0 auto;
}
.search-input-big input {
  flex: 1;
  padding: 10px 18px;
  border: 1px solid var(--paper-deep);
  background: var(--paper);
  border-radius: 24px;
  font-family: var(--font-kai);
  font-size: 15px;
  outline: none;
  color: var(--ink);
}
.search-input-big input:focus { border-color: var(--cinnabar); }
.search-input-big button {
  padding: 10px 24px;
  background: var(--cinnabar);
  color: var(--paper);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  font-family: var(--font-kai);
}
.search-input-big button:hover { background: #9c2c20; }

.match-tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 8px;
  vertical-align: middle;
}
.match-tag-title { background: var(--cinnabar-soft); color: var(--cinnabar); }
.match-tag-author { background: var(--qinglv-soft); color: var(--qinglv); }
.match-tag-text { background: var(--paper-deep); color: var(--ink-soft); }

/* ===== 状态提示 ===== */
.empty, .loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-faint);
  font-size: 16px;
}
.fallback-notice {
  background: #FFF3CD;
  border: 1px solid #FFEAA7;
  color: #856404;
  padding: 12px 20px;
  border-radius: 6px;
  margin-bottom: 24px;
  font-size: 14px;
  text-align: center;
}

/* ===== 高亮 ===== */
mark {
  background: #FFEAA7;
  color: var(--ink);
  padding: 0 2px;
  border-radius: 2px;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .topbar { padding: 12px 16px; }
  .topbar-inner { flex-wrap: wrap; gap: 8px; }
  .brand { font-size: 18px; }
  .nav { order: 3; width: 100%; justify-content: center; }
  .nav a { padding: 6px 12px; font-size: 14px; }
  .search-box input { width: 140px; }
  .search-box input:focus { width: 160px; }
  .container { padding: 16px; }
  .hero { padding: 32px 20px; min-height: 160px; }
  .hero-text { font-size: 22px; }
  .poem-detail { padding: 32px 20px; }
  .poem-detail-title { font-size: 26px; }
  .poem-detail-text { font-size: 18px; }
  .filter-bar { padding: 16px; gap: 12px; }
  .filter-group { flex: 1 1 auto; }
  .filter-group input { width: 100%; }
  .grid-3 { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}