:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #1f2733;
  --ink-soft: #5b6675;
  --ink-faint: #8a94a6;
  --line: #e7ebf2;
  --primary: #1f6feb;
  --primary-soft: #eaf2ff;
  --pass: #15a05a;
  --pass-soft: #e6f7ee;
  --fail: #e2483d;
  --fail-soft: #fdecea;
  --warn: #e8920c;
  --warn-soft: #fdf3e3;
  --shadow: 0 4px 18px rgba(31, 39, 51, .06);
  --radius: 14px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.app-header {
  background: linear-gradient(135deg, #1f6feb 0%, #2b4fd6 100%);
  color: #fff;
  padding: 18px 16px 16px;
}
.app-header .brand { display: flex; align-items: center; gap: 12px; max-width: 960px; margin: 0 auto; }
.app-header .logo {
  width: 46px; height: 46px; border-radius: 12px;
  background: rgba(255, 255, 255, .18);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; letter-spacing: -1px;
}
.app-header h1 { font-size: 18px; margin: 0; font-weight: 700; }
.app-header p { margin: 2px 0 0; font-size: 12.5px; opacity: .85; }

.container { max-width: 960px; margin: 0 auto; padding: 16px; }

/* ---------- 搜索 ---------- */
.search-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px; }
.search-row { display: flex; gap: 10px; }
.search-row input {
  flex: 1; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 15px; outline: none; background: #fbfcfe;
}
.search-row input:focus { border-color: var(--primary); background: #fff; }
.search-row button {
  border: none; background: var(--primary); color: #fff; font-weight: 600;
  padding: 0 20px; border-radius: 10px; font-size: 15px; cursor: pointer;
}
.search-row button:active { transform: scale(.97); }

.search-results { margin-top: 10px; display: none; flex-direction: column; gap: 6px; }
.search-results.show { display: flex; }
.result-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  cursor: pointer; background: #fff;
}
.result-item:hover { border-color: var(--primary); background: var(--primary-soft); }
.result-item .nm { font-weight: 600; }
.result-item .cd { color: var(--ink-faint); font-size: 13px; }

.quick { margin-top: 12px; font-size: 13px; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 5px 12px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.chip:active { background: var(--primary-soft); border-color: var(--primary); }

/* ---------- 加载 ---------- */
.loading { text-align: center; padding: 40px 16px; color: var(--ink-soft); }
.spinner {
  width: 42px; height: 42px; border: 4px solid var(--primary-soft);
  border-top-color: var(--primary); border-radius: 50%;
  margin: 0 auto 14px; animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.stepper { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-top: 18px; }
.stepper .dot { width: 22px; height: 22px; border-radius: 6px; background: var(--line); color: var(--ink-faint); font-size: 11px; display: flex; align-items: center; justify-content: center; }
.stepper .dot.done { background: var(--pass); color: #fff; }

/* ---------- 结论卡 ---------- */
.conclusion { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin-bottom: 16px; }
.concl-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.concl-title { font-size: 20px; font-weight: 800; }
.concl-sub { color: var(--ink-soft); font-size: 13px; margin-top: 2px; }
.badge { font-size: 12px; padding: 4px 10px; border-radius: 999px; font-weight: 600; }
.badge.live { background: var(--pass-soft); color: var(--pass); }
.badge.demo { background: var(--warn-soft); color: var(--warn); }
.grade-badge {
  text-align: center; background: var(--primary-soft); color: var(--primary);
  border-radius: 12px; padding: 10px 16px; min-width: 92px;
}
.grade-badge .g { font-size: 26px; font-weight: 800; line-height: 1; }
.grade-badge .l { font-size: 12px; margin-top: 4px; }

.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.metric { background: #f8fafc; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.metric .k { font-size: 12px; color: var(--ink-faint); }
.metric .v { font-size: 17px; font-weight: 700; margin-top: 2px; }
.metric .v small { font-size: 12px; color: var(--ink-soft); font-weight: 500; }

/* ---------- 汇总图表 ---------- */
.summary-charts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 16px; }
.mini-chart { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px; }
.mini-chart h4 { margin: 0 0 8px; font-size: 14px; }
.mini-chart .latest { float: right; font-size: 13px; color: var(--ink-soft); font-weight: 600; }

/* ---------- 步骤卡 ---------- */
.section-title { font-size: 17px; font-weight: 700; margin: 4px 2px 12px; }
.steps { display: flex; flex-direction: column; gap: 12px; }
.step-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.step-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px; cursor: pointer; }
.step-num {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: var(--primary); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.step-titles { flex: 1; min-width: 0; }
.step-titles .t { font-weight: 700; font-size: 15px; }
.step-titles .d { font-size: 12px; color: var(--ink-faint); margin-top: 1px; }
.step-verdict { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.verdict-pass { background: var(--pass-soft); color: var(--pass); }
.verdict-partial { background: var(--warn-soft); color: var(--warn); }
.verdict-fail { background: var(--fail-soft); color: var(--fail); }
.step-arrow { color: var(--ink-faint); transition: transform .2s; flex: none; }
.step-card.open .step-arrow { transform: rotate(90deg); }

.step-body { display: none; padding: 0 16px 16px; border-top: 1px solid var(--line); }
.step-card.open .step-body { display: block; }
.step-purpose { font-size: 13px; color: var(--ink-soft); margin: 12px 0 6px; }
.step-threshold { font-size: 12.5px; color: var(--primary); background: var(--primary-soft); padding: 8px 10px; border-radius: 8px; margin-bottom: 10px; }
.step-chart { margin: 6px 0 10px; }

.tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 6px 8px; text-align: right; white-space: nowrap; }
.tbl th { background: #f8fafc; color: var(--ink-soft); font-weight: 600; }
.tbl td.yr { text-align: center; color: var(--ink-soft); font-weight: 600; }
.tbl td.eval-pass { color: var(--pass); font-weight: 700; background: var(--pass-soft); }
.tbl td.eval-fail { color: var(--fail); font-weight: 700; background: var(--fail-soft); }
.tbl td.eval-na { color: var(--ink-faint); }
.step-analysis { font-size: 13.5px; color: var(--ink); margin-top: 10px; background: #f8fafc; border-left: 3px solid var(--primary); padding: 10px 12px; border-radius: 0 8px 8px 0; }

/* ---------- 免责声明 ---------- */
.disclaimer { margin: 18px 2px 8px; font-size: 12px; color: var(--ink-faint); line-height: 1.7; border-top: 1px dashed var(--line); padding-top: 12px; }

.error-box { background: var(--fail-soft); color: var(--fail); border-radius: var(--radius); padding: 16px; font-size: 14px; }

.hidden { display: none !important; }

/* 桌面适配 */
@media (min-width: 760px) {
  .metrics { grid-template-columns: repeat(6, 1fr); }
  .summary-charts { grid-template-columns: repeat(4, 1fr); }
  .app-header h1 { font-size: 20px; }
}