/* 议论文自评诊断台 · 纯静态版样式
   亮色主题；主色靛蓝 #3b5bdb，辅助暖橙 #e8590c。 */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --border: #e3e6ef;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #3b5bdb;
  --primary-dark: #2f4bc0;
  --primary-soft: #e8edfd;
  --accent: #e8590c;
  --accent-soft: #fdeee3;
  --ok: #2f9e44;
  --ok-soft: #e6f4ea;
  --warn: #b45309;
  --warn-soft: #fef3e2;
  --danger: #c92a2a;
  --danger-soft: #fdecec;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(31, 36, 48, .08);
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

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

/* ------------------------------------------------ 导航与提示条 */
#site-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 24px; height: 56px;
}
.brand { font-weight: 700; font-size: 1.05rem; color: var(--primary); white-space: nowrap; }
.nav-inner nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav-inner nav a {
  padding: 6px 12px; border-radius: 8px; color: var(--muted); font-size: .95rem;
}
.nav-inner nav a:hover { background: var(--primary-soft); color: var(--primary); text-decoration: none; }
.nav-inner nav a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.who { font-size: .9rem; color: var(--primary); font-weight: 600; }
.ghost { font-size: .85rem; color: var(--muted); }
.cta-small {
  font-size: .9rem; padding: 5px 12px; border-radius: 8px;
  background: var(--primary); color: #fff !important; text-decoration: none;
}
.cta-small:hover { background: var(--primary-dark); text-decoration: none; }

#demo-bar {
  background: var(--warn-soft); color: var(--warn);
  font-size: .85rem; text-align: center; padding: 6px 16px;
  border-bottom: 1px solid #f3d9ad;
}
#demo-bar b { color: #8a4b06; }

/* ------------------------------------------------ 布局 */
.container { max-width: 1080px; margin: 0 auto; padding: 28px 20px 64px; }
.page-head { margin-bottom: 20px; }
.page-head h1 { font-size: 1.6rem; margin: 0 0 6px; }
.page-head .sub { color: var(--muted); font-size: .95rem; }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 10px; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 22px; margin-bottom: 18px;
}
.card h2 { font-size: 1.15rem; margin: 0 0 12px; }
.card h3 { font-size: 1rem; margin: 16px 0 8px; }

.callout {
  border-left: 4px solid var(--primary); background: var(--primary-soft);
  padding: 12px 16px; border-radius: 0 8px 8px 0; margin: 12px 0; font-size: .95rem;
}
.callout.warn { border-left-color: var(--warn); background: var(--warn-soft); color: var(--warn); }
.callout.ok { border-left-color: var(--ok); background: var(--ok-soft); color: var(--ok); }
.callout b { font-weight: 700; }

.grid { display: grid; gap: 16px; }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* ------------------------------------------------ 按钮 / 表单 */
.btn {
  display: inline-block; border: none; cursor: pointer; font-size: .95rem;
  padding: 9px 18px; border-radius: 8px; background: var(--primary); color: #fff;
  font-family: inherit; line-height: 1.5; transition: background .15s;
}
.btn:hover { background: var(--primary-dark); }
.btn:disabled { background: #b9c4ea; cursor: not-allowed; }
.btn.secondary { background: var(--surface); color: var(--primary); border: 1px solid var(--primary); }
.btn.secondary:hover { background: var(--primary-soft); }
.btn.accent { background: var(--accent); }
.btn.accent:hover { background: #d9480f; }
.btn.small { padding: 5px 12px; font-size: .85rem; }
.btn.danger-ghost { background: transparent; color: var(--danger); border: 1px solid var(--danger); }

label { display: block; font-size: .9rem; font-weight: 600; margin: 12px 0 4px; }
label .hint { font-weight: 400; color: var(--muted); font-size: .82rem; }
input[type="text"], textarea, select {
  width: 100%; padding: 9px 12px; font-size: .95rem; font-family: inherit;
  border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
textarea { resize: vertical; min-height: 120px; }
.field-error { color: var(--danger); font-size: .85rem; margin-top: 4px; display: none; }
.field-error.show { display: block; }

/* ------------------------------------------------ 标签 / 徽章 */
.badge {
  display: inline-block; font-size: .75rem; padding: 2px 9px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary); margin-right: 6px; white-space: nowrap;
}
.badge.lv1 { background: var(--danger-soft); color: var(--danger); }
.badge.lv2 { background: var(--warn-soft); color: var(--warn); }
.badge.lv3 { background: var(--primary-soft); color: var(--primary); }
.badge.gray { background: #eef0f5; color: var(--muted); }

/* ------------------------------------------------ Tabs */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 2px solid var(--border); margin-bottom: 18px; }
.tabs button {
  border: none; background: none; cursor: pointer; font-family: inherit; font-size: .95rem;
  padding: 9px 16px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -2px;
}
.tabs button:hover { color: var(--primary); }
.tabs button.active { color: var(--primary); font-weight: 700; border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ------------------------------------------------ 分布条形图（纯 CSS） */
.bar-row { display: flex; align-items: center; gap: 10px; margin: 7px 0; font-size: .9rem; }
.bar-row .bar-label { width: 110px; text-align: right; color: var(--muted); flex-shrink: 0; }
.bar-row .bar-track { flex: 1; background: #eef0f5; border-radius: 6px; height: 18px; overflow: hidden; }
.bar-row .bar-fill { height: 100%; background: var(--primary); border-radius: 6px; min-width: 2px; }
.bar-row .bar-num { width: 90px; font-variant-numeric: tabular-nums; color: var(--muted); flex-shrink: 0; }

/* ------------------------------------------------ 体检命中列表 */
.hit {
  border: 1px solid var(--border); border-left: 4px solid var(--warn);
  border-radius: 8px; padding: 12px 16px; margin: 10px 0; background: var(--surface);
}
.hit.lv1 { border-left-color: var(--danger); }
.hit.lv2 { border-left-color: var(--warn); }
.hit.lv3 { border-left-color: var(--primary); }
.hit .hit-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.hit .hit-head b { font-size: .98rem; }
.hit .hit-msg { font-size: .93rem; }
.hit .hit-fix { font-size: .9rem; color: var(--ok); background: var(--ok-soft); border-radius: 6px; padding: 8px 12px; margin-top: 8px; }
.hit .hit-fix::before { content: "改法："; font-weight: 700; }
.zero-hits {
  text-align: center; color: var(--ok); background: var(--ok-soft);
  border-radius: 8px; padding: 18px; font-weight: 600;
}

/* ------------------------------------------------ AI 锚点反馈 */
.finding {
  border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; margin: 10px 0; background: var(--surface);
}
.finding .quote {
  background: #fffbe6; border-left: 3px solid #f0b429; padding: 6px 12px;
  border-radius: 0 6px 6px 0; font-size: .92rem; margin: 6px 0;
}
.finding .f-grid { display: grid; grid-template-columns: 76px 1fr; gap: 4px 10px; font-size: .92rem; }
.finding .f-grid dt { color: var(--muted); }
.finding .f-grid dd { margin: 0; }
mark.anchor { background: #fff3bf; padding: 0 2px; border-radius: 3px; }

/* ------------------------------------------------ 表格 */
table.tbl { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.tbl th, table.tbl td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
table.tbl th { background: #f0f2f8; white-space: nowrap; }
table.tbl tr:nth-child(even) td { background: #fafbfe; }

/* ------------------------------------------------ 题库列表 */
.q-list { list-style: none; margin: 0; padding: 0; }
.q-list li {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 18px; margin-bottom: 10px; transition: border-color .15s;
}
.q-list li:hover { border-color: var(--primary); }
.q-list .q-title { font-weight: 700; font-size: 1rem; }
.q-list .q-meta { color: var(--muted); font-size: .85rem; margin-top: 4px; }
.filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; align-items: flex-end; }
.filters label { margin: 0 0 4px; }
.filters select { width: auto; min-width: 140px; }

/* ------------------------------------------------ 流程图（首页三格） */
.flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 18px 0; }
.flow .step {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; text-align: center; position: relative;
}
.flow .step .num {
  width: 34px; height: 34px; line-height: 34px; border-radius: 50%;
  background: var(--primary); color: #fff; font-weight: 700; margin: 0 auto 10px;
}
.flow .step h3 { margin: 0 0 6px; font-size: 1rem; }
.flow .step p { margin: 0; font-size: .88rem; color: var(--muted); }
.flow .step .go { margin-top: 12px; display: inline-block; }

.hero { text-align: center; padding: 30px 0 6px; }
.hero h1 { font-size: 2rem; margin: 0 0 10px; }
.hero .sub { color: var(--muted); font-size: 1.02rem; max-width: 640px; margin: 0 auto 18px; }

/* ------------------------------------------------ 自评清单 */
.selfcheck-item { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: .92rem; }
.selfcheck-item:last-child { border-bottom: none; }
.selfcheck-item input { margin-top: 5px; flex-shrink: 0; }
.selfcheck-item .sc-code { color: var(--muted); font-size: .8rem; }

/* ------------------------------------------------ 步骤序号（诊断台） */
.step-tag {
  display: inline-block; width: 24px; height: 24px; line-height: 24px; text-align: center;
  background: var(--primary); color: #fff; border-radius: 6px; font-size: .85rem; margin-right: 8px;
}

/* ------------------------------------------------ 记录页 */
.record { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; background: var(--surface); }
.record .r-head {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 12px 16px; cursor: pointer; flex-wrap: wrap;
}
.record .r-head:hover { background: #fafbfe; }
.record .r-body { display: none; padding: 0 16px 16px; border-top: 1px solid var(--border); }
.record.open .r-body { display: block; }
.record .r-meta { color: var(--muted); font-size: .85rem; }

/* ------------------------------------------------ 页脚 */
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; text-align: center; padding: 18px; margin-top: 30px; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mt0 { margin-top: 0; }
code.inline { background: #eef0f5; border-radius: 4px; padding: 1px 6px; font-size: .85em; }

@media (max-width: 640px) {
  .nav-inner { gap: 10px; height: auto; padding: 8px 14px; flex-wrap: wrap; }
  .container { padding: 20px 14px 48px; }
  .bar-row .bar-label { width: 84px; font-size: .82rem; }
  .finding .f-grid { grid-template-columns: 1fr; }
  .finding .f-grid dt { margin-top: 4px; }
}