:root {
  --brand: #1f3864;
  --brand-2: #2e75b6;
  --ink: #1c2330;
  --muted: #5f6b7a;
  --line: #e3e9f1;
  --bg: #f7f9fc;
  --card: #ffffff;
  --soft: #eef4fb;
  --accent: #2e75b6;
  --warm: #b45309;
  --warm-bg: #fff7ed;
  --green: #15803d;
  --green-bg: #f0fdf4;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(31, 56, 100, 0.06);
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.logo {
  font-size: 19px; font-weight: 800; color: var(--brand);
  letter-spacing: 0.02em; white-space: nowrap;
}
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 18px; font-size: 14px; }
.nav a { color: var(--muted); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--brand); text-decoration: none; }

.search { margin-left: auto; position: relative; width: 300px; }
.search input {
  width: 100%; height: 40px; padding: 0 38px 0 14px;
  border: 1px solid var(--line); border-radius: 999px;
  background: #fff; font-size: 14px; color: var(--ink); outline: none;
}
.search input:focus { border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(46, 117, 182, 0.14); }
.search kbd {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-size: 11px; color: var(--muted); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; background: var(--bg); pointer-events: none;
}

/* 首屏 */
.hero { padding: 56px 0 28px; }
.hero h1 {
  margin: 0 0 14px; font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.2; letter-spacing: -0.02em; color: var(--brand); max-width: 820px;
}
.hero p { margin: 0; font-size: 17px; color: var(--muted); max-width: 720px; }
.stats { display: flex; gap: 32px; margin-top: 26px; flex-wrap: wrap; }
.stat b { display: block; font-size: 26px; color: var(--brand); line-height: 1.1; }
.stat span { font-size: 13px; color: var(--muted); }

/* 工具条 */
.list-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; padding: 18px 0 4px; }
.list-head h2 { margin: 0; font-size: 22px; color: var(--brand); }
.list-head span { font-size: 13px; color: var(--muted); }
.toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 0 18px; border-bottom: 1px solid var(--line); margin-bottom: 22px;
}
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--muted);
  border-radius: 999px; padding: 6px 13px; font-size: 13px;
  cursor: pointer; font-family: inherit;
}
.chip:hover { border-color: var(--brand-2); color: var(--brand); }
.chip[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: #fff; }
.count { margin-left: auto; font-size: 13px; color: var(--muted); }

/* 卡片 */
.grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px; padding-bottom: 40px;
}
.card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 20px 20px 18px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-2px); border-color: #c9d8ea; }
.card[hidden] { display: none; }
.card-top { display: flex; align-items: baseline; gap: 10px; }
.rank { font-size: 13px; font-weight: 700; color: #9aa8ba; font-variant-numeric: tabular-nums; }
.card h2 { margin: 0; font-size: 21px; line-height: 1.3; }
.card h2 a { color: var(--brand); }
.card h2 a:hover { text-decoration: none; color: var(--brand-2); }
.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 12px; line-height: 1; padding: 5px 8px; border-radius: 6px;
  background: var(--soft); color: var(--brand-2); white-space: nowrap;
}
.badge.up { background: var(--green-bg); color: var(--green); }
.badge.ever { background: #f3f4f6; color: #4b5563; }
.badge.replace { background: var(--warm-bg); color: var(--warm); }
.badge.auto { background: #f5f3ff; color: #6d28d9; }
.badge.new { background: #e0f2fe; color: #0369a1; }
.callout {
  background: #f5f3ff; color: #4c1d95; border-radius: 10px;
  padding: 12px 16px; font-size: 14px; margin: 0 0 18px;
}
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .verdict {
  color: var(--ink); font-size: 14px; background: var(--soft);
  border-radius: 8px; padding: 8px 10px;
}
.card-foot {
  display: flex; align-items: center; gap: 14px; margin-top: auto;
  padding-top: 6px; font-size: 13px; color: var(--muted);
}
.card-foot .go { margin-left: auto; color: var(--brand-2); font-weight: 600; }
.stars::before { content: "★ "; color: #d4a017; }

.empty {
  grid-column: 1 / -1; text-align: center; padding: 60px 20px;
  color: var(--muted); background: #fff; border: 1px dashed var(--line);
  border-radius: var(--radius);
}

/* 详情页 */
.article { max-width: 820px; margin: 0 auto; padding: 40px 24px 60px; }
.crumb { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.article h1 { margin: 0 0 10px; font-size: clamp(28px, 4vw, 40px); line-height: 1.2; color: var(--brand); }
.article .lead { font-size: 18px; color: var(--muted); margin: 0 0 20px; }
.meta {
  display: flex; gap: 10px; flex-wrap: wrap; padding: 14px 0 20px;
  border-bottom: 1px solid var(--line); margin-bottom: 26px;
}
.meta span {
  font-size: 13px; color: var(--muted); background: #fff;
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 10px;
}
.verdict-box {
  background: var(--soft); border-left: 4px solid var(--brand-2);
  border-radius: 8px; padding: 16px 18px; margin: 0 0 26px;
  font-size: 17px; color: var(--brand); font-weight: 600;
}
.article h2 { margin: 30px 0 10px; font-size: 21px; color: var(--brand); }
.article p { margin: 0 0 14px; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 18px 0 26px; }
.col {
  background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 18px;
}
.col h3 { margin: 0 0 10px; font-size: 15px; }
.col ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14.5px; }
.col li { margin: 4px 0; }
.col.good { border-top: 3px solid #22c55e; }
.col.bad { border-top: 3px solid #ef4444; }
.links {
  display: grid; gap: 10px; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 18px; margin-top: 26px;
}
.links a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; border-radius: 8px; background: var(--bg);
  font-size: 14.5px; font-weight: 600;
}
.links a:hover { background: var(--soft); text-decoration: none; }
.links a span { color: var(--muted); font-weight: 400; font-size: 13px; }

/* 页脚 */
footer {
  border-top: 1px solid var(--line); background: #fff;
  padding: 28px 0; font-size: 13px; color: var(--muted);
}
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer a { color: var(--muted); }

@media (max-width: 860px) {
  .topbar .wrap { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
  .search { width: 100%; margin-left: 0; order: 3; }
  .nav { order: 2; }
  .grid { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; }
  .hero { padding-top: 36px; }
}