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

:root {
  color-scheme: light;
  --accent-color: #38bdf8;
  --accent-color-secondary: #c084fc;
  --accent-color-strong: #60a5fa;
  --accent-r: 56;
  --accent-g: 189;
  --accent-b: 248;
  --bg-primary: #fdfdfd;
  --bg-secondary: #eef7f0;
  --bg-accent: linear-gradient(180deg, #fdfdfd 0%, #eef7f0 55%, #e6f4fb 100%),
    radial-gradient(circle at 20% 20%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.12), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1), transparent 50%);
  --glass-bg: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(203, 213, 225, 0.7);
  --glass-highlight: rgba(255, 255, 255, 1);
  --card-shadow: 0 18px 32px rgba(15, 23, 42, 0.12);
  --text-strong: #0f172a;
  --text-muted: rgba(15, 23, 42, 0.72);
  --timeline-line-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.8);
  --timeline-dot: linear-gradient(135deg, var(--accent-color), var(--accent-color-secondary));
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  color: var(--text-muted);
  background: var(--bg-accent);
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-repeat: no-repeat;
  mix-blend-mode: screen;
  opacity: 0.4;
  z-index: 0;
}

body::before {
  background-image: radial-gradient(520px 520px at 18% 15%, rgba(255, 255, 255, 0.85), transparent 68%),
    radial-gradient(420px 420px at 82% 0%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2), transparent 70%);
}

body::after {
  background-image: radial-gradient(360px 360px at 40% 85%, rgba(190, 242, 100, 0.35), transparent 68%),
    radial-gradient(460px 460px at 78% 70%, rgba(56, 189, 248, 0.25), transparent 75%),
    radial-gradient(380px 380px at 65% 35%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.16), transparent 78%);
  filter: blur(45px);
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 28px 96px;
  position: relative;
  z-index: 1;
}

.page-header {
  text-align: center;
  margin-bottom: 48px;
}

.page-header h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-strong);
  text-transform: uppercase;
  position: relative;
}

.page-header h1::after {
  content: "";
  display: block;
  width: 220px;
  height: 5px;
  margin: 16px auto 0;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0),
    rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.9),
    rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0)
  );
  box-shadow: 0 0 20px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.5);
}

.page-subtitle {
  margin: 0;
  font-size: 16px;
  color: var(--text-muted);
}

.page-subtitle code {
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--text-strong);
}

.timeline {
  position: relative;
  margin-top: 48px;
}

.timeline-line {
  position: absolute;
  left: 32px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, transparent, var(--timeline-line-color), transparent);
  filter: drop-shadow(0 0 6px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.35));
}

.timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline-item {
  position: relative;
  padding-left: 90px;
  margin-bottom: 36px;
}

.timeline-dot {
  position: absolute;
  left: 20px;
  top: 36px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--timeline-dot);
  box-shadow: 0 0 0 5px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2),
    0 10px 25px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.25);
  animation: pulse 3s ease-in-out infinite;
}

.card {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  padding: 24px 26px 26px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  transition: transform 0.4s ease, border-color 0.3s ease, background 0.3s ease;
}

.card::before,
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  border-radius: inherit;
}

.card::before {
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.9), transparent 60%);
  opacity: 0.35;
}

.card::after {
  inset: auto;
  top: -15%;
  left: -20%;
  width: 140%;
  height: 140%;
  background:
    radial-gradient(circle at 30% 30%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.4), transparent 55%),
    radial-gradient(circle at 70% 60%, rgba(236, 72, 153, 0.35), transparent 60%),
    radial-gradient(circle at 55% 80%, rgba(94, 234, 212, 0.35), transparent 65%);
  opacity: 0.35;
  filter: blur(70px);
  mix-blend-mode: screen;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.95) 40%, rgba(0, 0, 0, 0) 80%);
  -webkit-mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.95) 40%, rgba(0, 0, 0, 0) 80%);
}

.card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: transparent;
}

.card:hover::before,
.card:hover::after {
  opacity: 0.75;
}

.card-header {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
  z-index: 1;
}

.card-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.card-title a {
  color: var(--text-strong);
  text-decoration: none;
}

.card-title a:hover {
  color: var(--accent-color-strong);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: #0f172a;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 6px 12px rgba(15, 23, 42, 0.08);
}

.card-body {
  position: relative;
  z-index: 1;
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.6;
}

.card-sep {
  margin: 0 6px;
  color: rgba(107, 114, 128, 0.6);
}

.card-link {
  margin: 12px 0 0;
}

.card-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--text-strong);
  text-decoration: none;
  font-weight: 600;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.6);
  box-shadow: 0 6px 16px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
}

.card-link a:hover {
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.25);
}

.empty {
  margin-top: 48px;
  text-align: center;
  font-size: 15px;
  color: var(--text-muted);
}

.empty code {
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: #0f172a;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    opacity: 0.75;
  }
  50% {
    transform: scale(1.05);
    opacity: 1;
  }
  100% {
    transform: scale(0.95);
    opacity: 0.75;
  }
}

@media (max-width: 720px) {
  .page {
    padding-inline: 18px;
  }

  .timeline-line {
    left: 20px;
  }

  .timeline-item {
    padding-left: 70px;
  }

  .timeline-dot {
    left: 10px;
  }

  .card {
    padding: 20px;
  }
}