/* ============================================================
   AI 早报 · index 页面专属样式（2026-09-21 v2 主题化）
   ============================================================ */

body { padding-top: 70px; }

@media (max-width: 768px) { body { padding-top: 58px; } }

/* ========== Hero ========== */
.hero {
  text-align: center;
  padding: 40px 0 32px;
  position: relative;
  overflow: hidden;
}
.hero-icon {
  font-size: 64px;
  margin-bottom: 12px;
  display: inline-block;
  filter: drop-shadow(0 0 20px rgba(102,126,234,0.5));
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient-text);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  letter-spacing: 1px;
  animation: shimmer 6s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero .tagline {
  color: var(--text-tertiary);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto 8px;
  font-weight: 500;
}
.hero .meta {
  color: var(--text-muted);
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--surface-border);
}
.hero .meta::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent-success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-success);
  animation: blink 1.5s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ========== Stats ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 32px 0;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
}
.stat-card:hover {
  transform: translateY(-3px);
  background: var(--surface-hover);
  border-color: var(--surface-border);
}
.stat-card .icon { font-size: 24px; margin-bottom: 6px; display: block; }
.stat-card .value {
  font-size: 30px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--text-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-card .label {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 4px;
  font-weight: 500;
}
.stat-card.c1 { --accent: var(--accent-1); }
.stat-card.c2 { --accent: var(--accent-2); }
.stat-card.c3 { --accent: var(--accent-3); }
.stat-card.c4 { --accent: var(--accent-success); }

/* ========== Section ========== */
.section {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.section-header {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-header .badge {
  background: rgba(102,126,234,0.16);
  color: var(--accent-1);
  padding: 2px 10px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  margin-left: auto;
}
#trendChart { width: 100%; height: 240px; }

/* ========== Today Card ========== */
.today-card {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.today-meta { flex: 1; min-width: 200px; }
.today-date { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.today-headline {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.today-headline .badge-inline {
  background: var(--accent-danger);
  color: var(--text-on-accent);
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 13px;
  margin-left: 8px;
  vertical-align: middle;
  font-weight: 600;
}
.today-stats { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 10px; }
.today-stat {
  background: var(--surface);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-tertiary);
  border: 1px solid var(--surface-border);
}
.today-stat strong {
  color: var(--text-primary);
  font-weight: 700;
  margin-left: 4px;
}
.today-cta { display: flex; gap: 10px; flex-wrap: wrap; }

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--gradient-cta);
  color: var(--text-on-accent);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(102,126,234,0.4);
  color: var(--text-on-accent);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
}
.btn-secondary:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ========== Feature Grid ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 8px;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.feature-icon { font-size: 28px; margin-bottom: 8px; display: block; }
.feature-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.feature-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  margin-top: 32px;
  padding: 20px;
  color: var(--text-faint);
  font-size: 12px;
  line-height: 1.8;
}
.footer a {
  color: var(--accent-1);
  text-decoration: none;
  border-bottom: 1px dashed rgba(102,126,234,0.35);
}
.footer a:hover {
  color: var(--accent-2);
  border-bottom-color: var(--accent-2);
}

/* ========== Mobile ========== */
@media (max-width: 768px) {
  .stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 28px 0 24px; }
  .hero h1 { font-size: 30px; letter-spacing: 0; }
  .hero .tagline { font-size: 14px; padding: 0 8px; }
  .hero-icon { font-size: 48px; }
  .stat-card .value { font-size: 24px; }
  .section { padding: 18px 14px; }
  .today-card { flex-direction: column; align-items: flex-start; }
  .today-cta { width: 100%; }
  .btn { flex: 1; justify-content: center; padding: 10px 16px; font-size: 13px; }
}
@media (max-width: 380px) {
  .hero h1 { font-size: 24px; }
  .hero .tagline { font-size: 13px; line-height: 1.55; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-card { padding: 12px 8px; }
  .stat-card .value { font-size: 20px; }
  .stat-card .label { font-size: 10px; }
}