/* 岐智 · 古籍+现代 视觉 */
:root {
  --paper: #faf7f0;
  --paper-dark: #f1ece1;
  --ink: #2f2a24;
  --ink-soft: #6b6154;
  --accent: #8c2f2f;
  --accent-dark: #6f2525;
  --gold: #b08d57;
  --line: #e2dacb;
  --white: #fffdf8;
}

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

body {
  font-family: "Songti SC", "STSong", "SimSun", "Microsoft YaHei", serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 顶栏 */
.topbar {
  background: linear-gradient(180deg, var(--paper-dark), var(--paper));
  border-bottom: 2px solid var(--gold);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 54px; height: 54px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(140, 47, 47, .2);
}
.brand-text h1 { font-size: 24px; letter-spacing: 2px; color: var(--accent-dark); }
.brand-text p { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }

.tabs { display: flex; gap: 4px; flex: 1; }
.tab {
  border: none; background: transparent;
  font-family: inherit; font-size: 15px;
  padding: 10px 18px; cursor: pointer; color: var(--ink-soft);
  border-bottom: 3px solid transparent;
  transition: all .2s;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.disclaimer {
  font-size: 11px; color: var(--accent);
  background: #f7ecec; border: 1px solid #e8cfcf;
  padding: 4px 10px; border-radius: 20px; white-space: nowrap;
}

/* 主容器 */
.container { flex: 1; max-width: 1100px; margin: 0 auto; width: 100%; padding: 24px 28px 40px; }

.panel { display: none; }
.panel.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.section-head { margin-bottom: 18px; }
.section-head h2 { font-size: 22px; color: var(--accent-dark); letter-spacing: 1px; }
.muted { color: var(--ink-soft); font-size: 13px; margin-top: 4px; }

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 1px 4px rgba(47, 42, 36, .06);
  transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(47, 42, 36, .1); }

.card .tag {
  display: inline-block; font-size: 11px; color: var(--accent);
  background: #f7ecec; padding: 2px 8px; border-radius: 12px; margin-bottom: 8px;
}
.card h3 { font-size: 16px; color: var(--accent-dark); margin-bottom: 8px; }
.card .article {
  font-size: 15px; line-height: 1.8; color: var(--ink);
  border-left: 3px solid var(--gold);
  padding-left: 12px; margin-bottom: 10px;
}
.card .note { font-size: 13px; line-height: 1.7; color: var(--ink-soft); }
.card .meta { font-size: 12px; color: var(--gold); margin-top: 10px; }
.card .fang-link { margin-top: 10px; font-size: 13px; color: var(--accent); cursor: pointer; }

.group-title {
  grid-column: 1 / -1;
  margin-top: 12px; padding-bottom: 8px;
  font-size: 15px; font-weight: 600; color: var(--accent-dark);
  border-bottom: 2px solid var(--gold); letter-spacing: 1px;
}
.story-text {
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; cursor: pointer; color: var(--ink-soft);
}
.story-text.open { display: block; }

.load-more {
  grid-column: 1 / -1;
  border: 1px solid var(--line); background: var(--white);
  color: var(--ink-soft); font-family: inherit; font-size: 14px;
  padding: 10px; border-radius: 8px; cursor: pointer;
}
.load-more:hover { border-color: var(--accent); color: var(--accent); }

/* 学习记录 */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; text-align: center; box-shadow: 0 1px 4px rgba(47,42,36,.06);
}
.stat-num { display: block; font-size: 28px; font-weight: 600; color: var(--accent); }
.stat-label { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
.bar-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; margin-bottom: 16px;
}
.bar-title { font-size: 14px; font-weight: 600; color: var(--accent-dark); margin-bottom: 12px; }
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.bar-label { width: 72px; font-size: 13px; color: var(--ink); flex-shrink: 0; }
.bar-track { flex: 1; background: var(--paper-dark); border-radius: 6px; height: 14px; overflow: hidden; }
.bar { height: 100%; background: linear-gradient(90deg, var(--gold), var(--accent)); border-radius: 6px; min-width: 4px; }
.bar-count { width: 32px; text-align: right; font-size: 13px; color: var(--ink-soft); }
.heat-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.heat-cell {
  text-align: center; font-size: 12px; color: var(--ink-soft);
  background: var(--paper-dark); border-radius: 6px; padding: 8px 4px;
}
.heat-cell.active { background: var(--accent); color: var(--white); font-weight: 600; }
.record-box { margin-top: 4px; }
.record-list { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.record-item {
  background: var(--white); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 14px;
}
.record-item.mastered { border-color: var(--gold); background: #faf6ec; }
.record-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.record-kind {
  font-size: 11px; color: var(--accent); background: #f7ecec;
  padding: 2px 8px; border-radius: 12px; flex-shrink: 0;
}
.record-q { font-size: 14px; color: var(--ink); flex: 1; min-width: 160px; }
.record-date { font-size: 12px; color: var(--ink-soft); flex-shrink: 0; }
.record-a {
  font-size: 12px; color: var(--ink-soft); line-height: 1.6;
  margin-top: 6px; background: var(--paper); padding: 8px 10px; border-radius: 6px;
}
.record-actions { margin-top: 8px; }
.record-btn {
  border: 1px solid var(--line); background: transparent; color: var(--ink-soft);
  font-family: inherit; font-size: 12px; padding: 4px 12px; border-radius: 14px; cursor: pointer;
}
.record-btn:hover { border-color: var(--accent); color: var(--accent); }
.record-item.mastered .record-btn { color: var(--accent); border-color: var(--accent); }

/* 经典原文书签 */
.bookmark-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.bookmark-chip {
  border: 1px solid var(--line); background: var(--white); color: var(--ink-soft);
  font-family: inherit; font-size: 13px; padding: 6px 14px; border-radius: 20px; cursor: pointer;
  transition: all .2s;
}
.bookmark-chip:hover { border-color: var(--accent); color: var(--accent); }
.bookmark-chip.active { background: var(--accent); color: var(--white); border-color: var(--accent); font-weight: 600; }
.card .article.collapsible { cursor: pointer; }
.card .fang-article { font-size: 13px; line-height: 1.7; color: var(--ink-soft); border-left: 3px solid var(--accent); padding-left: 10px; margin-bottom: 10px; }

/* 方—证—案联动弹窗 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(47, 42, 36, .45);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 20px;
}
.modal-mask[hidden] { display: none; }
.modal {
  background: var(--paper); border: 1px solid var(--gold); border-radius: 12px;
  max-width: 720px; width: 100%; max-height: 85vh;
  display: flex; flex-direction: column; box-shadow: 0 12px 40px rgba(47, 42, 36, .3);
  animation: fade .2s ease;
}
.modal-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 2px solid var(--gold); flex-shrink: 0;
}
.modal-title { flex: 1; font-size: 16px; font-weight: 600; color: var(--accent-dark); letter-spacing: 1px; }
.modal-back, .modal-close {
  border: 1px solid var(--line); background: var(--white); color: var(--ink-soft);
  font-family: inherit; font-size: 14px; padding: 4px 12px; border-radius: 6px; cursor: pointer;
}
.modal-back:hover, .modal-close:hover { border-color: var(--accent); color: var(--accent); }
.modal-body { padding: 18px; overflow-y: auto; }
.modal-section { margin-bottom: 18px; }
.modal-section-title {
  font-size: 14px; font-weight: 600; color: var(--gold); margin-bottom: 8px;
  border-left: 3px solid var(--gold); padding-left: 8px;
}
.modal-item {
  background: var(--white); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; margin-bottom: 8px; cursor: pointer; transition: all .15s;
}
.modal-item:hover { border-color: var(--accent); box-shadow: 0 2px 8px rgba(140, 47, 47, .12); }
.modal-item h4 { font-size: 14px; color: var(--accent-dark); margin-bottom: 4px; }
.modal-item .mi { font-size: 12.5px; color: var(--ink-soft); line-height: 1.6; }
.modal-item .mi .mi-k { color: var(--gold); }
.modal-empty { font-size: 12px; color: var(--ink-soft); padding: 6px 0; }
.modal-target { background: var(--paper-dark); border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin-bottom: 16px; }
.modal-target .mt-title { font-size: 15px; font-weight: 600; color: var(--accent-dark); margin-bottom: 6px; }
.modal-target .mt-text { font-size: 13px; color: var(--ink); line-height: 1.8; }

/* 聊天区 */
.chat-wrap { display: flex; flex-direction: column; height: calc(100vh - 240px); min-height: 420px; }
.chat-box {
  flex: 1; overflow-y: auto; padding: 16px 8px;
  display: flex; flex-direction: column; gap: 16px;
}
.msg { max-width: 82%; padding: 12px 16px; border-radius: 12px; line-height: 1.7; font-size: 14.5px; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--accent); color: var(--white); border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--white); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg .src { margin-top: 10px; font-size: 12px; color: var(--ink-soft); }
.msg .src .src-item { margin: 4px 0; }
.msg .loading { color: var(--ink-soft); font-size: 13px; }

.chat-input-bar { display: flex; gap: 10px; padding-top: 10px; }
.chat-input-bar textarea {
  flex: 1; resize: none; font-family: inherit; font-size: 14.5px;
  border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  background: var(--white); outline: none; min-height: 48px;
}
.chat-input-bar textarea:focus { border-color: var(--gold); }
.send-btn {
  border: none; background: var(--accent); color: var(--white);
  padding: 0 24px; border-radius: 10px; font-size: 15px; cursor: pointer;
  font-family: inherit; transition: background .2s;
}
.send-btn:hover { background: var(--accent-dark); }
.send-btn:disabled { background: #c9a8a8; cursor: not-allowed; }

.chat-hint { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 10px; }
.chat-hint .chip {
  border: 1px solid var(--line); background: var(--white);
  color: var(--ink-soft); font-size: 12.5px; font-family: inherit;
  padding: 5px 12px; border-radius: 20px; cursor: pointer;
}
.chat-hint .chip:hover { border-color: var(--accent); color: var(--accent); }

.footer { text-align: center; padding: 16px; color: var(--ink-soft); font-size: 12px; border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  .topbar { gap: 12px; padding: 12px 16px; }
  .tabs { width: 100%; order: 3; }
  .container { padding: 16px; }
}