/* 中考备战 · 共享样式（唯一一份，各页都引这个，别复制） */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1e2430;
  --ink-soft: #5b6577;
  --line: #e3e7ef;
  --brand: #2f6fed;
  --brand-soft: #eaf1ff;
  --warm: #f0704a;
  --ok: #2e9e6b;
  --shadow: 0 1px 2px rgba(20, 30, 60, .05), 0 8px 24px rgba(20, 30, 60, .06);
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 62rem; margin: 0 auto; padding: 0 1.1rem 3rem; }

/* 顶栏 */
header.top {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.top .wrap {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding-top: .75rem;
  padding-bottom: .75rem;
  flex-wrap: wrap;
}
.logo { font-weight: 700; font-size: 1.05rem; letter-spacing: .02em; white-space: nowrap; }
.logo span { color: var(--brand); }
nav { display: flex; gap: .3rem; flex-wrap: wrap; }
nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: .3rem .7rem;
  border-radius: 8px;
  font-size: .95rem;
}
nav a:hover { background: var(--bg); color: var(--ink); }
nav a.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }

/* 大标题区 */
.hero { padding: 2.2rem 0 1.4rem; }
.hero h1 { font-size: 1.7rem; margin: 0 0 .4rem; letter-spacing: .01em; }
.hero p { margin: 0; color: var(--ink-soft); }

/* 倒计时 */
.countdown {
  background: linear-gradient(135deg, #2f6fed, #5a8cff);
  color: #fff;
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.countdown .num { font-size: 3rem; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.countdown .label { opacity: .9; }
.countdown .date { margin-left: auto; opacity: .85; font-size: .9rem; }

/* 卡片 */
.grid { display: grid; gap: 1rem; margin-top: 1.4rem; }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 .5rem; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.card ul { margin: .5rem 0 0; padding-left: 1.2rem; color: var(--ink-soft); font-size: .95rem; }
.card li { margin: .25rem 0; }
a.card { text-decoration: none; color: inherit; display: block; transition: transform .12s, box-shadow .12s; }
a.card:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(20,30,60,.08), 0 14px 32px rgba(20,30,60,.09); }

.tag {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 6px;
  padding: .05rem .5rem;
  font-size: .8rem;
  font-weight: 600;
}
.tag.warm { background: #ffeee9; color: var(--warm); }
.tag.ok { background: #e7f6ee; color: var(--ok); }

h2.sec {
  margin: 2.2rem 0 .2rem;
  font-size: 1.25rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--line);
}
h2.sec + p.lead { color: var(--ink-soft); margin: .5rem 0 0; }

/* 时间轴 */
.timeline { margin-top: 1.2rem; border-left: 2px solid var(--line); padding-left: 1.3rem; }
.phase { position: relative; padding-bottom: 1.6rem; }
.phase::before {
  content: "";
  position: absolute;
  left: -1.72rem;
  top: .55rem;
  width: .7rem; height: .7rem;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}
.phase h3 { margin: 0 0 .2rem; font-size: 1.05rem; }
.phase .when { color: var(--brand); font-size: .88rem; font-weight: 600; }
.phase p { margin: .3rem 0 0; color: var(--ink-soft); }

/* 表格 */
table { width: 100%; border-collapse: collapse; margin-top: 1rem; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
th, td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--line); font-size: .95rem; }
th { background: #fafbfe; font-weight: 600; color: var(--ink-soft); }
tr:last-child td { border-bottom: 0; }

/* 错题本 */
.form-row { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1rem; }
input, select, textarea {
  font: inherit; font-size: 16px;
  padding: .55rem .7rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--card);
  color: var(--ink);
}
textarea { width: 100%; min-height: 4.5rem; resize: vertical; }
button {
  font: inherit; font-size: 16px; font-weight: 600;
  padding: .55rem 1.1rem;
  border: 0; border-radius: 9px;
  background: var(--brand); color: #fff;
  cursor: pointer;
}
button.ghost { background: transparent; color: var(--ink-soft); border: 1px solid var(--line); }
.note {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: .9rem 1.1rem; margin-top: .8rem; box-shadow: var(--shadow);
}
.note .meta { color: var(--ink-soft); font-size: .85rem; display: flex; gap: .6rem; align-items: center; }
.note .body { margin-top: .35rem; white-space: pre-wrap; }
.empty { color: var(--ink-soft); text-align: center; padding: 2.5rem 1rem; }

footer.foot {
  margin-top: 3rem; padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft); font-size: .88rem;
}

@media (max-width: 46rem) {
  .grid.c2, .grid.c3 { grid-template-columns: 1fr; }
  .countdown .num { font-size: 2.4rem; }
  .countdown .date { margin-left: 0; width: 100%; }
  .hero h1 { font-size: 1.4rem; }
}