/* ══════════════════════════════════════
   AI 知识库价目表 · 共享样式
   ══════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&display=swap');

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

:root {
  --bg: #F5F0E8;
  --ink: #1A1A1A;
  --ink-light: #666;
  --ink-muted: #999;
  --white: #ffffff;
  --dark-card: #1E1E1E;

  /* 品牌主色（每页覆写） */
  --accent: #E8674A;
  --accent-light: rgba(232, 103, 74, 0.12);

  --radius-card: 16px;
  --radius-tag: 6px;

  font-family: 'PingFang SC', 'Noto Sans CJK SC', 'Microsoft YaHei', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── 顶部导航 Bar ── */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px 14px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.top-bar .brand { font-size: 12px; font-weight: 500; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; font-family: 'IBM Plex Mono', monospace; }
.top-bar .tagline { font-size: 12px; color: var(--ink-light); letter-spacing: 0.3px; }

/* ── 通用按钮 ── */
.btn-primary {
  display: block;
  background: #E8E1D4;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: 14px;
  text-decoration: none;
  text-align: center;
  border: none;
  cursor: pointer;
  width: 100%;
}

.btn-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: #E8E1D4;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: 14px;
  text-decoration: none;
  text-align: center;
  border: none;
  cursor: pointer;
  width: 100%;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--ink-light);
  font-size: 14px;
  text-decoration: none;
  padding: 8px 0;
}

/* ── 标签 ── */
.tag-accent {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: var(--radius-tag);
  letter-spacing: 0.3px;
}

.tag-outline {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-size: 12px;
  font-weight: 400;
  padding: 5px 12px;
  border-radius: 30px;
  background: #E8E1D4;
  white-space: nowrap;
}

.tag-special {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 30px;
}

/* ── 文件卡片（黑底） ── */
.file-card {
  background: var(--dark-card);
  border-radius: var(--radius-card);
  padding: 24px 22px;
  color: white;
}

.file-card .section-num {
  font-size: 22px;
  font-style: italic;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 6px;
}

.file-card .section-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 18px;
}

.file-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.file-row:last-child { border-bottom: none; }

.insight-item--more {
  color: var(--ink-muted);
  font-size: 12px;
  font-style: italic;
}
.insight-item--more::before {
  background: var(--ink-muted);
}

.file-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.file-dot {
  width: 12px; height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.file-name {
  font-size: 15px;
  font-weight: 600;
  color: white;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.file-tag-special {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  margin-left: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.file-desc {
  font-size: 11px;
  color: rgba(255,255,255,0.45);
  white-space: normal;
  overflow-wrap: break-word;
  text-align: right;
  max-width: 55%;
}

/* ── 功能卡片（白底） ── */
.feature-card {
  background: white;
  border-radius: var(--radius-card);
  padding: 22px 20px;
}

.feature-card .section-num {
  font-size: 20px;
  font-style: italic;
  color: var(--ink-muted);
  font-weight: 700;
  margin-bottom: 4px;
}

.feature-card .section-title {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 8px;
}

.feature-card .section-desc {
  font-size: 13.5px;
  color: var(--ink-light);
  line-height: 1.6;
}

/* ── 二列网格 ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── 分隔线 ── */
.section-divider {
  height: 1px;
  background: rgba(0,0,0,0.08);
  margin: 4px 0;
}

/* ── sticky 版本标签 ── */
.sticky-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.sticky-label.visible {
  opacity: 1;
}

/* ── 响应式：平板/桌面 ── */
@media (min-width: 640px) {
  .top-bar { padding: 20px 24px; }
  .page-content { max-width: 640px; margin: 0 auto; }
}

@media (min-width: 1024px) {
  .page-content { max-width: 860px; }
  .top-bar { max-width: 860px; margin: 0 auto; }
}