/* ================================================================
   BIOGUIDER.CN — 首页样式
   字体：系统字体栈（无需外部加载）
   ================================================================ */

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

:root {
  --bg:       #F1F5F9;
  --surface:  #fff;
  --border:   #E2E8F0;
  --text:     #0F172A;
  --text-2:   #475569;
  --text-3:   #94A3B8;
  --blue:     #2563EB;
  --blue-dk:  #1D4ED8;
  --blue-lt:  #EFF6FF;
  --green:    #16A34A;
  --red:      #DC2626;

  --q1-bg: #DCFCE7; --q1-fg: #14532D;
  --q2-bg: #DBEAFE; --q2-fg: #1E3A8A;
  --q3-bg: #FEF9C3; --q3-fg: #713F12;
  --q4-bg: #FFE4E6; --q4-fg: #881337;

  --z1-bg: #EFF6FF; --z1-fg: #1D4ED8;
  --z2-bg: #F0FDF4; --z2-fg: #15803D;
  --z3-bg: #FFFBEB; --z3-fg: #B45309;
  --z4-bg: #F8FAFC; --z4-fg: #64748B;

  --sh:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --sh-md: 0 4px 16px rgba(0,0,0,.08);
  --sh-lg: 0 8px 32px rgba(0,0,0,.10);
}

body {
  /*
    系统字体栈：
    - San Francisco  (macOS / iOS)
    - Segoe UI       (Windows 10/11)
    - system-ui      (现代浏览器通用)
    - PingFang SC    (macOS 中文)
    - Microsoft YaHei (Windows 中文)
  */
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui,
               'Helvetica Neue', Arial,
               'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── 导航栏（body > nav 避免影响 sidebar 里的 nav.entry-list） ── */
body > nav {
  background: #fff;
  border-bottom: 1px solid var(--border);
  height: 52px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.nav-logo { display:flex; align-items:center; gap:9px; text-decoration:none; margin-right:16px; flex-shrink:0; }
.nav-logo:hover .nav-logo-name { color:var(--blue); }
.nav-logo-text { line-height:1.15; }
.nav-logo-name { font-size:15px; font-weight:700; color:var(--text); letter-spacing:-.2px; transition:color .15s; }
.nav-logo-sub  { font-size:9px; font-weight:600; color:var(--blue); letter-spacing:.7px; text-transform:uppercase; margin-top:1px; }
.nav-sites { display:flex; align-items:center; gap:1px; flex-shrink:0; }
.nav-site { font-size:12.5px; padding:4px 8px; border-radius:6px; text-decoration:none; color:var(--text-2); font-weight:500; transition:color .15s,background .15s; white-space:nowrap; }
.nav-site:hover { color:var(--blue); background:var(--blue-lt); }
.nav-site.active { color:var(--blue); font-weight:600; }
.nav-site-sep { color:var(--border); font-size:12px; padding:0 1px; user-select:none; }
.nav-links { display:flex; gap:2px; margin-left:auto; }
.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 13px;
  padding: 5px 10px;
  border-radius: 6px;
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--bg); }

/* ── Hero ── */
.hero {
  background: linear-gradient(160deg, #EFF6FF 0%, #F8FAFF 50%, #F0FDF4 100%);
  border-bottom: 1px solid var(--border);
  padding: 56px 24px 48px;
  text-align: center;
}
.hero-logo {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--blue);
  margin-bottom: 6px;
  background: linear-gradient(135deg, #2563EB, #0EA5E9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tools {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 14px auto 28px;
  max-width: 720px;
}
.hero-tool-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 16px;
  background: rgba(255,255,255,.82);
  border: 1px solid rgba(255,255,255,.55);
  border-radius: 20px;
  text-decoration: none;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(6px);
  transition: all .15s;
  white-space: nowrap;
}
.hero-tool-link:hover {
  background: #fff;
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 3px 10px rgba(37,99,235,.18);
  transform: translateY(-1px);
}

/* ── 搜索框 ── */
.search-wrap { max-width: 640px; margin: 0 auto; position: relative; }
.search-row {
  display: flex;
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--sh-lg);
  transition: border-color .2s, box-shadow .2s;
}
.search-row:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(37,99,235,.10), var(--sh-lg);
}
.s-icon {
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  flex-shrink: 0;
}
#q {
  flex: 1;
  border: none;
  outline: none;
  font-size: 16px;
  font-family: inherit;
  padding: 14px 0;
  color: var(--text);
  background: transparent;
}
#q::placeholder { color: var(--text-3); }
.s-btn {
  margin: 7px;
  padding: 0 22px;
  height: 40px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s;
}
.s-btn:hover { background: var(--blue-dk); }

/* ── 自动补全 ── */
.ac-drop {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--sh-lg);
  z-index: 300;
  overflow: hidden;
  display: none;
}
.ac-drop.open { display: block; }
.ac-row {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  gap: 12px;
  cursor: pointer;
  transition: background .1s;
  border-bottom: 1px solid #F8FAFC;
}
.ac-row:last-child { border-bottom: none; }
.ac-row:hover, .ac-row.on { background: var(--blue-lt); }
.ac-main { flex: 1; min-width: 0; }
.ac-name  { font-weight: 500; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ac-abbr  { font-size: 11.5px; color: var(--text-3); margin-top: 1px; }
.ac-side  { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.ac-if    { font-size: 13px; font-weight: 700; color: var(--blue); }
.ac-row mark { background: rgba(37,99,235,.15); color: var(--blue); border-radius: 2px; }

/* ── 最近搜索 ── */
.recent-wrap {
  max-width: 640px;
  margin: 14px auto 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 28px;
}
.recent-label { font-size: 12px; color: var(--text-3); flex-shrink: 0; }
.recent-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,.8);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 12px 3px 10px;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all .15s;
  text-decoration: none;
}
.recent-chip:hover { border-color: var(--blue); color: var(--blue); background: #fff; }
.recent-chip .rc-x {
  font-size: 11px;
  color: var(--text-3);
  margin-left: 2px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}
.recent-chip .rc-x:hover { color: var(--red); }
.recent-clear {
  font-size: 12px;
  color: var(--text-3);
  cursor: pointer;
  text-decoration: none;
  transition: color .15s;
  margin-left: 4px;
}
.recent-clear:hover { color: var(--red); }

/* ── 统计数字 ── */
.hero-stats {
  max-width: 640px;
  margin: 20px auto 0;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.hstat { text-align: center; }
.hstat-num { font-size: 22px; font-weight: 700; color: var(--blue); letter-spacing: -.02em; }
.hstat-lbl { font-size: 11px; color: var(--text-3); margin-top: 1px; }

/* ── 双栏主体 ── */
.page-body {
  display: grid;
  grid-template-columns: 240px minmax(0,1fr);
  gap: 20px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  flex: 1;
  align-items: start;
}

/* ── 左侧边栏 ── */
.sidebar { position: sticky; top: 68px; }
.sb-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  box-shadow: var(--sh);
  margin-bottom: 12px;
}
.sb-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-3);
  margin-bottom: 10px;
}
.entry-list { display: flex; flex-direction: column; gap: 2px; }
.entry-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-2);
  font-size: 13px;
  transition: all .15s;
}
.entry-link:hover { background: var(--blue-lt); color: var(--blue); }
.entry-link .el-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  min-width: 26px;
  font-size: 15px;
  line-height: 1;
  flex-shrink: 0;
}
.entry-link .el-txt  { flex: 1; min-width: 0; }
.entry-link .el-name { font-weight: 500; font-size: 13px; line-height: 1.3; }
.entry-link .el-desc { font-size: 11px; color: var(--text-3); margin-top: 2px; }
.entry-link:hover .el-desc { color: rgba(37,99,235,.65); }
.sb-cnt {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-3);
  background: #F1F5F9;
  border-radius: 10px;
  padding: 1px 6px;
  margin-left: auto;
  flex-shrink: 0;
}
.entry-link:hover .sb-cnt { background: rgba(37,99,235,.1); color: var(--blue); }

.sb-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sb-stat  { text-align: center; padding: 8px 4px; }
.sb-stat-num { font-size: 18px; font-weight: 700; color: var(--blue); letter-spacing: -.02em; }
.sb-stat-lbl { font-size: 10px; color: var(--text-3); margin-top: 2px; }

/* ── 右侧内容 ── */
.content { min-width: 0; }
.section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title::after { content: ''; flex: 1; height: 1px; background: var(--border); order: 1; }

/* ── 热门期刊列表 ── */
.hot-list {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--sh);
  overflow: hidden;
}
.hot-list-header {
  display: grid;
  grid-template-columns: 36px minmax(0,1fr) 90px 56px 80px;
  padding: 8px 14px;
  background: #F8FAFC;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.hot-row {
  display: grid;
  grid-template-columns: 36px minmax(0,1fr) 90px 56px 80px;
  padding: 11px 14px;
  align-items: center;
  border-bottom: 1px solid #F8FAFC;
  text-decoration: none;
  color: var(--text);
  transition: background .12s;
}
.hot-row:last-child { border-bottom: none; }
.hot-row:hover { background: var(--blue-lt); }
.hot-rank {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-3);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #F1F5F9;
}
.hot-row:hover .hot-rank { background: rgba(37,99,235,.12); color: var(--blue); }
.hot-name-wrap { min-width: 0; padding-right: 12px; }
.hot-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hot-row:hover .hot-name { color: var(--blue); }
.hot-abbr {
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hot-if-wrap { text-align: right; padding-right: 8px; }
.hot-if   { font-size: 15px; font-weight: 700; color: var(--blue); font-variant-numeric: tabular-nums; }
.hot-delta { font-size: 10.5px; font-weight: 600; margin-left: 4px; }
.up   { color: var(--green); }
.down { color: var(--red); }
.hot-q    { display: flex; justify-content: center; }
.hot-zone { display: flex; justify-content: flex-end; }

/* ── 分区徽章 ── */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 5px; font-size: 11.5px; font-weight: 600; }
.q-Q1 { background: var(--q1-bg); color: var(--q1-fg); }
.q-Q2 { background: var(--q2-bg); color: var(--q2-fg); }
.q-Q3 { background: var(--q3-bg); color: var(--q3-fg); }
.q-Q4 { background: var(--q4-bg); color: var(--q4-fg); }
.z1   { background: var(--z1-bg); color: var(--z1-fg); }
.z2   { background: var(--z2-bg); color: var(--z2-fg); }
.z3   { background: var(--z3-bg); color: var(--z3-fg); }
.z4   { background: var(--z4-bg); color: var(--z4-fg); }

/* ── 数量控制按钮 ── */
.hr-hidden { display: none !important; }
.count-picker {
  display: flex;
  gap: 3px;
  align-items: center;
  order: 2;
  flex-shrink: 0;
}
.cp-btn {
  padding: 2px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--text-3);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s;
  line-height: 1.6;
}
.cp-btn:hover  { border-color: var(--blue); color: var(--blue); }
.cp-btn.active { background: var(--blue); border-color: var(--blue); color: #fff; }

.hot-more {
  display: block;
  text-align: center;
  padding: 12px;
  font-size: 13px;
  color: var(--blue);
  text-decoration: none;
  font-weight: 500;
  border-top: 1px solid var(--border);
  background: #FAFBFC;
  transition: background .15s;
}
.hot-more:hover { background: var(--blue-lt); }

/* ── 页脚 ── */
footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}
footer a { color: var(--text-3); text-decoration: none; }
footer a:hover { color: var(--blue); }

/* ── 响应式 ── */
@media (max-width: 900px) {
  .page-body { grid-template-columns: 200px minmax(0,1fr); gap: 14px; padding: 16px 12px 48px; }
  .hot-list-header,
  .hot-row { grid-template-columns: 30px minmax(0,1fr) 80px 50px; }
  .hot-zone { display: none; }
}

@media (max-width: 640px) {
  .hero { padding: 32px 16px 28px; }
  .hero-logo { font-size: 30px; }
  .hero-sub  { font-size: 12.5px; margin-bottom: 24px; }
  .hero-stats { gap: 12px; }
  .page-body { grid-template-columns: minmax(0,1fr); padding: 12px 12px 40px; }
  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: minmax(0,1fr) minmax(0,1fr);
    gap: 10px;
    margin-bottom: 4px;
  }
  .sb-block { margin-bottom: 0; }
  .hot-list-header { display: none; }
  .hot-row { grid-template-columns: 30px minmax(0,1fr) 80px 50px; padding: 10px 12px; }
  .hot-zone { display: none; }
}