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

:root {
  --color-primary: #1a56a0;
  --color-accent: #e84545;
  --color-bg: #f5f7fa;
  --color-bg-gray: #eef0f4;
  --color-text: #1a1a2e;
  --color-text-muted: #5a6a7a;
  --color-border: #d0d7e2;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(0,0,0,0.08);
}

body {
  font-family: 'Hiragino Kaku Gothic ProN', 'Meiryo', 'Yu Gothic', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0d2b5e 0%, #1a56a0 60%, #2a7fca 100%);
  color: #fff;
  padding: 80px 20px 70px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 40px;
  background: var(--color-bg);
  clip-path: ellipse(55% 100% at 50% 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #c8daff;
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(28px, 6vw, 52px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.accent {
  color: #ffd166;
}

.hero-sub {
  font-size: 18px;
  color: #b8d0f0;
  margin-bottom: 24px;
}

.hero-sub strong {
  color: #ffd166;
  font-size: 22px;
}

.hero-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  color: #b8c8e0;
}

.icon-warn { font-size: 16px; }

/* Sections */
.section {
  padding: 60px 0;
}

.section--gray {
  background: var(--color-bg-gray);
}

.section-title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 32px;
  color: var(--color-primary);
  padding-left: 14px;
  border-left: 4px solid var(--color-accent);
}

/* Alert */
.alert-section {
  padding: 40px 0;
}

.alert-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #fff8f0;
  border: 2px solid #f4a843;
  border-radius: var(--radius);
  padding: 28px 32px;
}

.alert-icon {
  font-size: 36px;
  flex-shrink: 0;
  line-height: 1;
}

.alert-title {
  font-size: 20px;
  font-weight: 800;
  color: #c45c00;
  margin-bottom: 12px;
}

.alert-body {
  color: #5a3800;
  line-height: 1.8;
}

.alert-body strong {
  color: var(--color-accent);
  font-size: 18px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 20px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.card-label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.card-value {
  font-size: 40px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1.1;
}

.card-value--sm {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 700;
}

.unit {
  font-size: 20px;
  font-weight: 700;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -29px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-border);
  border: 3px solid var(--color-bg-gray);
}

.timeline-item.done .timeline-dot {
  background: var(--color-primary);
  border-color: #c8daff;
}

.timeline-item.active .timeline-dot {
  background: var(--color-accent);
  border-color: #ffdada;
  box-shadow: 0 0 0 4px rgba(232,69,69,0.15);
}

.timeline-content {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.timeline-item.active .timeline-content {
  border-left: 3px solid var(--color-accent);
}

.timeline-item.done .timeline-content {
  border-left: 3px solid var(--color-primary);
}

.timeline-date {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.timeline-content h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--color-text);
}

.timeline-content p {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* FAQ */
.faq {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
}

.faq-item summary::after {
  content: '＋';
  color: var(--color-primary);
  font-size: 18px;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item[open] summary::after {
  content: '－';
}

.faq-item p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

/* Sources */
.sources {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.sources li {
  padding: 12px 20px;
  background: #fff;
  border-radius: 8px;
  font-size: 14px;
  border-left: 3px solid var(--color-primary);
  box-shadow: var(--shadow);
}

.sources-note {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* Footer */
footer {
  background: #0d2b5e;
  color: #a0b8d8;
  text-align: center;
  padding: 32px 20px;
}

footer p {
  font-size: 14px;
  margin-bottom: 4px;
}

.footer-sub {
  font-size: 12px;
  color: #5a7a9a;
}

/* Responsive */
@media (max-width: 600px) {
  .alert-card {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }

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

  .timeline {
    padding-left: 24px;
  }
}