:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1a2233;
  --muted: #5c6b82;
  --line: #e2e8f3;
  --primary: #3b5bdb;
  --primary-soft: #edf2ff;
  --a: #e03131;
  --a-soft: #fff5f5;
  --b: #1971c2;
  --b-soft: #e7f5ff;
  --c: #2f9e44;
  --c-soft: #ebfbee;
  --ok: #2b8a3e;
  --bad: #c92a2a;
  --shadow: 0 10px 30px rgba(26, 34, 51, 0.08);
  --radius: 16px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #eef2ff 0%, var(--bg) 220px);
  color: var(--text);
  line-height: 1.6;
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.hero { margin-bottom: 24px; }
.eyebrow {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}
.hero h1 {
  margin: 8px 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
}
.hero h1 span { color: var(--primary); }
.lead { max-width: 760px; color: var(--muted); font-size: 1.05rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 16px; font-size: 1.2rem; }

.runtime-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.runtime-item {
  background: var(--primary-soft);
  border-radius: 12px;
  padding: 12px 14px;
}
.runtime-item span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}
.runtime-item strong { font-size: 14px; }

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.control-row label { font-weight: 600; }
.control-row select {
  min-width: 280px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 15px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.question-detail {
  margin-top: 16px;
  padding: 16px;
  background: #f8f9fc;
  border-radius: 12px;
  border-left: 4px solid var(--primary);
}
.question-detail p { margin: 6px 0; }
.question-detail strong { color: var(--text); }

.progress { margin-top: 18px; }
.progress-bar {
  height: 8px;
  background: #e9ecef;
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), #748ffc);
  transition: width 0.35s ease;
}
#progress-text { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.flow-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.flow-steps li {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: #fafbfe;
}
.flow-steps li span { display: block; font-weight: 700; }
.flow-steps li em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 13px;
  color: var(--muted);
}
.flow-steps li.running {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.flow-steps li.done {
  border-color: var(--ok);
  background: #ebfbee;
}
.flow-steps li.done em { color: var(--ok); }

.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}
.mode-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 420px;
}
.mode-card[data-mode="direct"] .mode-head { background: var(--a-soft); border-bottom-color: #ffc9c9; }
.mode-card[data-mode="zero_shot"] .mode-head { background: var(--b-soft); border-bottom-color: #a5d8ff; }
.mode-card[data-mode="few_shot"] .mode-head { background: var(--c-soft); border-bottom-color: #b2f2bb; }

.mode-head {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}
.mode-head h3 { margin: 0; font-size: 1.05rem; }
.mode-head p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.badges { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.badge {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #edf2f7;
  color: var(--muted);
}
.badge.ok { background: #d3f9d8; color: var(--ok); }
.badge.bad { background: #ffe3e3; color: var(--bad); }
.badge.info { background: #d0ebff; color: #1864ab; }

.mode-body { padding: 16px 18px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.section-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
}
.prompt-summary {
  font-size: 13px;
  color: var(--muted);
  background: #f8f9fc;
  padding: 10px 12px;
  border-radius: 10px;
}
.message-list { display: flex; flex-direction: column; gap: 8px; }
.message-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.message-item summary {
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 13px;
  background: #f8f9fc;
  list-style: none;
}
.message-item summary::-webkit-details-marker { display: none; }
.message-item pre {
  margin: 0;
  padding: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
  line-height: 1.5;
  background: #fff;
  max-height: 220px;
  overflow: auto;
}
.reply-box {
  background: #111827;
  color: #f3f4f6;
  border-radius: 10px;
  padding: 12px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 280px;
  overflow: auto;
  flex: 1;
}
.mode-card.placeholder .mode-body {
  align-items: center;
  justify-content: center;
  color: var(--muted);
  min-height: 300px;
}
.mode-card.loading .mode-body::after {
  content: "正在调用百炼 API…";
  color: var(--primary);
  font-weight: 600;
}

.summary-tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.summary h3 { margin: 0 0 10px; font-size: 1rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: #f8f9fc; }
.tips {
  margin-top: 18px;
  padding: 16px;
  background: #f8f9fc;
  border-radius: 12px;
}
.tips ul { margin: 8px 0 0; padding-left: 20px; }

@media (max-width: 1024px) {
  .compare-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .summary-tables { grid-template-columns: 1fr; }
}