/* FundPark ad-landing demo — dark fintech direction:
   deep navy canvas, electric blue→violet accents, warm amber CTA. */

:root {
  --bg: #070d1f;
  --glow-1: rgba(91, 140, 255, 0.08);
  --glow-2: rgba(139, 92, 246, 0.06);
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #eef2ff;
  --text-dim: rgba(238, 242, 255, 0.64);
  --text-faint: rgba(238, 242, 255, 0.4);
  --accent: #5b8cff;
  --accent-2: #8b5cf6;
  --grad-accent: linear-gradient(135deg, #5b8cff, #8b5cf6);
  --grad-cta: linear-gradient(135deg, #ffb154, #ff7e3f);
  --cta-shadow: 0 4px 14px rgba(255, 126, 63, 0.18);

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --text-base: clamp(1rem, 0.95rem + 0.3vw, 1.08rem);
  --text-hero: clamp(1.55rem, 1.2rem + 2.2vw, 2.3rem);
  --text-metric: clamp(1.35rem, 1.1rem + 1.6vw, 1.9rem);

  --duration-fast: 160ms;
  --duration-normal: 340ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(52rem 34rem at 85% -10%, var(--glow-1), transparent 60%),
    radial-gradient(46rem 30rem at -15% 45%, var(--glow-2), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100dvh;
}

.app {
  max-width: 34.5rem;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

/* ── Top bar ─────────────────────────────────────────── */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 0 1.4rem;
}

.brand {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
}

.brand span {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: -0.55rem;
}

.brand em {
  font-style: normal;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-faint);
  border-left: 1px solid var(--border-strong);
  padding-left: 0.55rem;
}

.lang-btn {
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  cursor: pointer;
  transition: color var(--duration-fast), border-color var(--duration-fast);
}

.lang-btn:hover,
.lang-btn:focus-visible {
  color: var(--text);
  border-color: var(--accent);
  outline: none;
}

/* ── Stage transitions ───────────────────────────────── */

.stage > * {
  animation: fadeUp var(--duration-normal) var(--ease-out) both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Shared controls ─────────────────────────────────── */

.cta-btn {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 1.02rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  color: #2b1503;
  background: var(--grad-cta);
  border: none;
  border-radius: var(--radius-md);
  padding: 0.95rem 1.2rem;
  cursor: pointer;
  box-shadow: var(--cta-shadow);
  transition: transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(255, 126, 63, 0.42);
}

.cta-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.cta-btn:active {
  transform: translateY(0);
}

.link-btn {
  font: inherit;
  font-size: 0.86rem;
  color: var(--text-dim);
  background: none;
  border: none;
  padding: 0.2rem 0;
  cursor: pointer;
  transition: color var(--duration-fast);
}

.link-btn:hover:not(:disabled),
.link-btn:focus-visible {
  color: var(--text);
  outline: none;
}

.link-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

/* ── Stage 1 · simulated feed ad ─────────────────────── */

.feed-hint {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: center;
  margin-bottom: 0.9rem;
}

.ad-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.1rem 1.25rem;
  backdrop-filter: blur(12px);
}

.ad-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
}

.ad-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  font-weight: 800;
  color: #fff;
  background: var(--grad-accent);
  flex-shrink: 0;
}

.ad-id {
  display: flex;
  flex-direction: column;
  line-height: 1.35;
}

.ad-id strong {
  font-size: 0.94rem;
}

.ad-id span {
  font-size: 0.74rem;
  color: var(--text-faint);
}

.ad-visual {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  padding: 2rem 1.4rem 1.6rem;
  background:
    radial-gradient(18rem 12rem at 110% -20%, rgba(255, 177, 84, 0.1), transparent 60%),
    linear-gradient(140deg, #16244d 0%, #1b2350 55%, #202a56 100%);
  border: 1px solid var(--border-strong);
}

.ad-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(10rem 8rem at -10% 110%, rgba(91, 140, 255, 0.14), transparent 65%);
  pointer-events: none;
}

.ad-visual h1 {
  position: relative;
  z-index: 1;
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 0.005em;
  margin-bottom: 1.1rem;
}

.ad-chips {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.24rem 0.7rem;
}

.ad-body {
  font-size: 0.92rem;
  color: var(--text-dim);
  margin: 1rem 0.15rem 1.1rem;
}

.ad-meta {
  font-size: 0.76rem;
  color: var(--text-faint);
  text-align: center;
  margin-top: 0.8rem;
}

/* ── Stage 2 · quiz ──────────────────────────────────── */

.quiz-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.7rem;
}

.quiz-step {
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
}

.progress {
  height: 4px;
  border-radius: 999px;
  background: var(--surface-strong);
  overflow: hidden;
  margin-bottom: 2rem;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--grad-accent);
  transition: width var(--duration-normal) var(--ease-out);
}

.quiz-title {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1.5rem;
}

.options {
  display: grid;
  gap: 0.65rem;
}

.option {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  font: inherit;
  font-size: 0.98rem;
  font-weight: 500;
  text-align: left;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  transition: border-color var(--duration-fast), background var(--duration-fast),
    transform var(--duration-fast) var(--ease-out);
}

.option:hover {
  border-color: var(--accent);
  background: var(--surface-strong);
  transform: translateY(-1px);
}

.option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.option.selected {
  background: var(--grad-accent);
  border-color: transparent;
  color: #fff;
}

.opt-key {
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  flex-shrink: 0;
  font-size: 0.74rem;
  font-weight: 700;
  border-radius: 0.5rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border);
}

.option.selected .opt-key {
  color: #fff;
  background: rgba(255, 255, 255, 0.2);
  border-color: transparent;
}

/* ── Stage 3 · analyzing ─────────────────────────────── */

.analyzing {
  text-align: center;
  padding-top: 4.5rem;
}

.scanner {
  width: 5.4rem;
  height: 5.4rem;
  margin: 0 auto 1.8rem;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 12%, var(--accent), var(--accent-2), transparent 88%);
  animation: spin 1.15s linear infinite;
  display: grid;
  place-items: center;
}

.scanner-core {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  background: var(--bg);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.analyzing h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.analyzing-step {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

/* ── Stage 4 · report ────────────────────────────────── */

.report-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.8rem;
  margin-bottom: 1.1rem;
}

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--text-faint);
}

.report-badge.is-ai .badge-dot {
  background: var(--grad-accent);
  box-shadow: 0 0 8px rgba(91, 140, 255, 0.8);
}

.report-headline {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.report-sub {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 1.6rem;
}

.metric-grid {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 2.1rem;
}

.metric-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
}

.metric-card:first-child {
  background: linear-gradient(140deg, rgba(91, 140, 255, 0.16), rgba(139, 92, 246, 0.12));
  border-color: rgba(91, 140, 255, 0.35);
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.metric-value {
  font-size: var(--text-metric);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.metric-hint {
  font-size: 0.74rem;
  color: var(--text-faint);
}

.section-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  /* 组间节奏:组内 14px / 组间 28px,间距差即分组信息 */
  margin-top: 28px;
  margin-bottom: 1rem;
}

.insights {
  list-style: none;
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.1rem;
}

.insight {
  display: flex;
  gap: 0.95rem;
}

.insight-index {
  font-size: 0.95rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.9;
  flex-shrink: 0;
}

.insight h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.insight p {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.reco {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.7rem;
}

.reco h3 {
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
}

.reco p {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.cta-main {
  margin-bottom: 0.6rem;
}

.cta-note {
  font-size: 0.78rem;
  color: var(--text-faint);
  text-align: center;
  margin-bottom: 2rem;
}

.disclaimer {
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--text-faint);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-bottom: 1.2rem;
}

.restart-btn {
  display: block;
  margin: 0 auto;
}

/* ── Skeleton placeholders & progressive copy fill ───── */

.skeleton {
  display: block;
  border-radius: 6px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.06) 25%,
    rgba(255, 255, 255, 0.14) 50%,
    rgba(255, 255, 255, 0.06) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

.sk-headline {
  width: 92%;
  height: 1.35em;
  margin-bottom: 0.35rem;
}

.sk-headline.short {
  width: 58%;
}

.sk-title {
  width: 45%;
  height: 1em;
  margin-bottom: 0.2rem;
}

.sk-line {
  width: 100%;
  height: 0.85em;
  margin-bottom: 0.4rem;
}

.sk-line.short {
  width: 68%;
}

.copy-in {
  display: inline-block;
  animation: copyIn 450ms var(--ease-out) both;
}

@keyframes copyIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Error ───────────────────────────────────────────── */

.error-box {
  text-align: center;
  padding-top: 4rem;
}

.error-box h1 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.error-box p {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 1.6rem;
}

/* ── Wider screens ───────────────────────────────────── */

@media (min-width: 720px) {
  .app {
    max-width: 40rem;
  }

  .metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .ad-visual {
    padding: 2.6rem 1.8rem 2rem;
  }
}

/* ── Reduced motion ──────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .stage > * {
    animation: none;
  }

  .skeleton,
  .copy-in {
    animation: none;
  }

  .scanner {
    animation-duration: 3s;
  }

  .cta-btn:hover,
  .option:hover {
    transform: none;
  }
}

/* —— 信任层(阶段 1):完善度条 + 证据抽屉 —— */

.evidence {
  margin-top: 18px;
  padding: 0 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.evidence > summary {
  cursor: pointer;
  list-style: none;
  padding: 13px 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.evidence > summary::-webkit-details-marker {
  display: none;
}

.evidence > summary::before {
  content: '';
  flex: none;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--text-faint);
  border-bottom: 1.5px solid var(--text-faint);
  transform: rotate(-45deg);
  transition: transform var(--duration-fast) var(--ease-out);
}

.evidence[open] > summary::before {
  transform: rotate(45deg);
}

.evidence-answers {
  list-style: none;
  margin: 0 0 12px;
  display: grid;
  gap: 8px;
}

.evidence-answers li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
}

.ev-q {
  color: var(--text-faint);
}

.ev-a {
  color: var(--text);
  text-align: right;
}

.evidence-vars {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.evidence-boundary {
  font-size: 0.78rem;
  color: var(--text-faint);
  padding-bottom: 14px;
  line-height: 1.6;
}

/* —— 信任层 1.1:纠错入口 —— */

/* —— 种子层(阶段 2):良好型种植区 —— */

.cta-seed {
  display: block;
  width: 100%;
  padding: 16px;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--grad-accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 18px;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.cta-seed:disabled {
  opacity: 0.72;
  cursor: default;
}

.wecom-slot {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
  padding: 12px 16px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.wecom-box {
  flex: none;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background:
    repeating-linear-gradient(0deg, var(--border-strong) 0 4px, transparent 4px 8px),
    repeating-linear-gradient(90deg, var(--border-strong) 0 4px, transparent 4px 8px);
  opacity: 0.55;
}

.wecom-hint {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.site-link {
  display: inline-block;
  margin-top: 14px;
  padding: 11px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.site-link:hover,
.site-link:focus-visible {
  border-color: var(--accent);
  color: var(--text);
}

/* —— 信任栏(P1-4):完善度 + 纠错入口统一容器 —— */

.trust-bar {
  margin-top: 14px;
  padding: 4px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.trust-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 9px 0;
}

.trust-row + .trust-row {
  border-top: 1px solid var(--border);
}

.trust-label {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.trust-action {
  border: 0;
  background: none;
  cursor: pointer;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  padding: 0;
}

.trust-action:hover,
.trust-action:focus-visible {
  text-decoration: underline;
}

/* —— 抽屉可发现性(P1-5) —— */

.evidence {
  border-left: 3px solid var(--accent);
}

.evidence > summary {
  color: var(--text);
}