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

:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #10b981;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --text: #1e293b;
  --muted: #64748b;
  --border: rgba(148, 163, 184, 0.22);
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 22px 60px rgba(59, 130, 246, 0.18);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1180px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(16, 185, 129, 0.12), transparent 28%),
    linear-gradient(180deg, #fefefe 0%, var(--bg) 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a,
button {
  -webkit-tap-highlight-color: transparent;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(248, 250, 252, 0.84);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 12px 24px rgba(59, 130, 246, 0.24);
}

.brand span:last-child {
  font-size: 1.02rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 10px 14px;
  color: var(--muted);
  border-radius: 999px;
  transition: all 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-dark);
  background: rgba(59, 130, 246, 0.1);
}

.hero {
  padding: 48px 0 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: stretch;
}

.hero-card,
.glass-card,
.surface-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 42px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: auto -32px -48px auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18), transparent 66%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary-dark);
  font-weight: 700;
  margin-bottom: 20px;
}

.hero h1,
.page-hero h1,
.section-title {
  color: var(--text);
  line-height: 1.15;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 4.2rem);
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 56ch;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 18px;
  border-radius: 14px;
  font-weight: 700;
  transition: all 0.25s ease;
  box-shadow: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #5b8ff9);
  box-shadow: 0 14px 28px rgba(59, 130, 246, 0.24);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(59, 130, 246, 0.32);
}

.btn-secondary {
  color: var(--primary-dark);
  background: rgba(59, 130, 246, 0.1);
}

.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.14);
  transform: translateY(-2px);
}

.btn-success {
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), #34d399);
}

.btn-ghost {
  color: var(--text);
  background: rgba(15, 23, 42, 0.04);
}

.hero-aside {
  display: grid;
  gap: 18px;
}

.stats-panel {
  padding: 28px;
  display: grid;
  gap: 18px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0.03));
  border: 1px solid rgba(59, 130, 246, 0.12);
}

.stat strong {
  display: block;
  font-size: 1.35rem;
  color: var(--primary-dark);
}

.stat span {
  color: var(--muted);
  font-size: 0.92rem;
}

.mini-list {
  display: grid;
  gap: 12px;
}

.mini-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
}

.mini-item i {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--primary-dark);
  background: rgba(59, 130, 246, 0.1);
}

.section {
  padding: 22px 0 48px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-bottom: 22px;
}

.section-title {
  font-size: clamp(1.55rem, 2.4vw, 2.35rem);
  margin-bottom: 6px;
}

.section-subtitle {
  color: var(--muted);
  max-width: 60ch;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.test-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.test-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.22);
}

.test-icon {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #60a5fa);
  margin-bottom: 18px;
}

.test-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.test-card p {
  color: var(--muted);
  min-height: 4.8em;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: #047857;
  font-size: 0.85rem;
  font-weight: 700;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.intro-card {
  padding: 28px;
}

.intro-card h3,
.panel h3,
.result-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.intro-card p,
.panel p,
.result-card p,
.page-lead {
  color: var(--muted);
}

.feature-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.feature-list li {
  list-style: none;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--muted);
}

.feature-list i {
  color: var(--secondary);
  margin-top: 4px;
}

.site-footer {
  padding: 28px 0 40px;
  color: var(--muted);
}

.footer-card {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.page-hero {
  padding: 36px 0 14px;
}

.page-hero .surface-card,
.page-body .surface-card,
.result-shell .surface-card,
.accordion-card {
  padding: 26px;
}

.page-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.05);
  color: var(--muted);
  font-size: 0.92rem;
}

.quiz-shell {
  padding: 8px 0 96px;
}

.quiz-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.progress-wrap {
  display: grid;
  gap: 10px;
  width: min(100%, 420px);
}

.progress-track {
  height: 12px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.2);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.35s ease;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.94rem;
}

.question-card {
  padding: 28px;
  min-height: clamp(320px, 42svh, 440px);
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.question-card.is-leaving {
  opacity: 0;
  transform: translateY(10px);
}

.question-number {
  color: var(--primary-dark);
  font-weight: 800;
  margin-bottom: 8px;
}

.question-title {
  font-size: clamp(1.35rem, 2vw, 1.9rem);
  line-height: 1.3;
}

.question-hint {
  color: var(--muted);
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.option-item {
  display: flex;
  align-items: stretch;
}

.option-button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  padding: 15px 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(148, 163, 184, 0.22);
  transition: all 0.2s ease;
}

.option-button:hover {
  border-color: rgba(59, 130, 246, 0.42);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(59, 130, 246, 0.08);
}

.option-button.selected {
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 14px 24px rgba(59, 130, 246, 0.1);
}

.option-button input {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.option-copy strong {
  display: block;
  color: var(--text);
  line-height: 1.25;
}

.option-copy span {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.quiz-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.sticky-submit {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background: rgba(248, 250, 252, 0.92);
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  backdrop-filter: blur(14px);
}

.sticky-submit .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
}

.sticky-note {
  color: var(--muted);
}

.projection-shell {
  padding: 8px 0 96px;
}

.projection-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
}

.image-panel {
  padding: 20px;
}

.image-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.zoom-control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.zoom-control input {
  width: 160px;
}

.projection-list {
  display: grid;
  gap: 14px;
  max-height: 76svh;
  overflow: auto;
  padding-right: 4px;
}

.projection-item {
  padding: 12px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.98));
}

.projection-item.active {
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 14px 24px rgba(59, 130, 246, 0.08);
}

.projection-item img {
  width: 100%;
  display: block;
  border-radius: 14px;
  background: #e2e8f0;
  aspect-ratio: 240 / 170;
  object-fit: cover;
  transform-origin: center center;
  transition: transform 0.2s ease;
}

.projection-item figcaption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-top: 10px;
  color: var(--muted);
}

.answer-panel {
  padding: 26px;
}

.answer-panel textarea {
  width: 100%;
  min-height: clamp(240px, 38svh, 420px);
  resize: vertical;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 20px;
  padding: 18px;
  color: var(--text);
  background: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.answer-panel textarea:focus {
  outline: none;
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.08);
}

.answer-panel .prompt-box {
  margin-top: 14px;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(16, 185, 129, 0.08);
  color: #065f46;
}

.accordion-grid {
  display: grid;
  gap: 14px;
}

.accordion-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.accordion-card summary::-webkit-details-marker {
  display: none;
}

.accordion-card[open] {
  border-color: rgba(59, 130, 246, 0.22);
}

.accordion-content {
  padding-top: 16px;
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.info-chip {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.1);
}

.info-chip strong {
  display: block;
  color: var(--text);
  margin-bottom: 4px;
}

.result-shell {
  padding: 28px 0 56px;
}

.result-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 18px;
}

.result-card {
  padding: 26px;
}

.result-hero {
  display: grid;
  gap: 14px;
}

.result-kpi {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.kpi-box {
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.08), rgba(255, 255, 255, 0.92));
  border: 1px solid rgba(59, 130, 246, 0.12);
}

.kpi-box strong {
  display: block;
  color: var(--primary-dark);
  font-size: 1.15rem;
}

.chart-box {
  height: 320px;
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.analysis-item {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.analysis-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.analysis-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 4px;
}

.analysis-item h4 {
  font-size: 1.02rem;
  margin-bottom: 0;
  color: var(--primary-dark);
}

.analysis-metrics {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  min-width: 92px;
}

.analysis-score,
.analysis-level {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.analysis-score {
  background: rgba(59, 130, 246, 0.12);
  color: #1d4ed8;
}

.analysis-level {
  background: rgba(16, 185, 129, 0.12);
  color: #047857;
}

.analysis-summary {
  margin-bottom: 12px;
  color: #334155;
  font-size: 0.92rem;
  line-height: 1.65;
  padding: 10px 12px;
  border-left: 3px solid rgba(59, 130, 246, 0.42);
  background: rgba(59, 130, 246, 0.05);
  border-radius: 0 12px 12px 0;
}

.analysis-detail {
  padding-top: 2px;
}

.analysis-detail strong {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #64748b;
  margin-bottom: 6px;
}

.analysis-item p {
  font-size: 0.95rem;
  line-height: 1.7;
}

.recommendations {
  display: grid;
  gap: 12px;
}

.recommendation {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.12);
}

.recommendation i {
  color: var(--secondary);
  margin-top: 4px;
}

.action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.disclaimer {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(245, 158, 11, 0.1);
  color: #92400e;
  border: 1px solid rgba(245, 158, 11, 0.16);
}

.fade-in {
  animation: fadeInUp 0.45s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .hero-grid,
  .projection-grid,
  .result-grid,
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .grid-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-wrap,
  .section-header,
  .quiz-topbar,
  .footer-card,
  .image-toolbar,
  .sticky-submit .container {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero-card,
  .stats-panel,
  .test-card,
  .intro-card,
  .page-hero .surface-card,
  .page-body .surface-card,
  .result-card,
  .image-panel,
  .answer-panel,
  .question-card {
    padding: 18px;
  }

  .hero {
    padding-top: 26px;
  }

  .stat-row,
  .result-kpi,
  .analysis-grid,
  .info-grid,
  .grid-cards {
    grid-template-columns: 1fr;
  }

  .options-grid {
    grid-template-columns: 1fr;
  }

  .question-card {
    min-height: auto;
  }

  .question-title {
    font-size: clamp(1.12rem, 5.2vw, 1.42rem);
  }

  .option-button {
    padding: 13px 14px;
    border-radius: 16px;
  }

  .option-copy strong {
    font-size: 0.98rem;
  }

  .option-copy span {
    font-size: 0.88rem;
  }

  .progress-wrap {
    width: 100%;
  }

  .quiz-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 10px;
    align-items: center;
  }

  .sticky-submit .btn,
  .image-toolbar .btn {
    width: 100%;
  }

  .quiz-controls .btn {
    width: 100%;
  }

  .quiz-controls .page-lead {
    grid-column: 1 / -1;
    order: 3;
    text-align: center;
    margin-top: -2px;
  }

  .sticky-submit .container {
    padding: 12px 0;
  }

  .chart-box {
    height: 280px;
  }

  .sticky-submit {
    position: static;
    margin-top: 18px;
  }

  .answer-panel textarea {
    min-height: 28svh;
  }

  .projection-grid {
    gap: 14px;
  }

  .projection-list {
    max-height: 42svh;
  }
}