:root {
  --bg: #071425;
  --panel: rgba(14, 29, 53, 0.72);
  --panel-strong: rgba(20, 42, 74, 0.82);
  --line: rgba(121, 196, 255, 0.22);
  --text: #ebf4ff;
  --muted: #a6bcd3;
  --accent: #5dd1ff;
  --accent-2: #7dffcd;
  --shadow: 0 22px 58px rgba(6, 13, 28, 0.44);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  background:
    radial-gradient(circle at 18% 16%, rgba(93, 209, 255, 0.16), transparent 30rem),
    radial-gradient(circle at 78% 88%, rgba(125, 255, 205, 0.13), transparent 26rem),
    linear-gradient(180deg, #050f20 0%, #08162b 45%, #061126 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mix-blend-mode: soft-light;
  opacity: 0.4;
}

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

.site-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
  padding: 26px 0 34px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-avatar {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  color: #041025;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.brand-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.top-nav {
  display: flex;
  gap: 20px;
}

.top-nav a {
  font-size: 14px;
  color: #c4d6ef;
  position: relative;
  padding-bottom: 4px;
}

.top-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width 0.2s ease;
}

.top-nav a:hover::after,
.top-nav a:focus-visible::after {
  width: 100%;
}

.hero {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: stretch;
}

.hero-content,
.hero-panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  padding: 34px;
}

.hero-kicker {
  margin: 0 0 16px;
  color: var(--accent-2);
  font-weight: 600;
  letter-spacing: 0.1em;
  font-size: 12px;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.26;
  letter-spacing: -0.02em;
}

.hero-description {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin: 26px 0;
}

.btn {
  display: inline-flex;
  padding: 11px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061d35;
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.24);
}

.hero-meta {
  margin: 0;
  color: #8fa8c7;
  font-size: 13px;
}

.hero-panel h2 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 22px;
}

.hero-panel ul {
  margin: 0;
  padding-left: 18px;
  color: #d6e4f5;
  display: grid;
  gap: 10px;
}

.hero-panel li::marker {
  color: var(--accent-2);
}

.section {
  margin-top: 24px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
}

.section-head {
  margin-bottom: 20px;
}

.section-kicker {
  margin: 0;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  font-size: 11px;
}

h2 {
  margin: 8px 0 0;
  font-size: 30px;
  line-height: 1.2;
}

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

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  border: 1px solid rgba(143, 198, 255, 0.22);
  border-radius: 16px;
  background: var(--panel-strong);
  padding: 18px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline li {
  border: 1px solid rgba(143, 198, 255, 0.22);
  border-radius: 16px;
  background: var(--panel-strong);
  padding: 16px 16px 14px;
}

.timeline span {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--accent-2);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.1em;
}

.timeline h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list span {
  border: 1px solid rgba(143, 198, 255, 0.25);
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(9, 21, 40, 0.6);
  color: #d5e5f8;
  font-size: 13px;
}

.site-footer {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid rgba(93, 209, 255, 0.2);
  border-radius: 18px;
  background: var(--panel);
  color: #a7bfd7;
  font-size: 13px;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

.site-footer a {
  color: #9de0ff;
  text-decoration: underline;
}

@media (max-width: 960px) {
  .site-shell {
    width: min(100% - 22px, 860px);
  }

  .site-header,
  .top-nav {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  h2 {
    font-size: 28px;
  }
}

@media (max-width: 620px) {
  .site-shell {
    width: calc(100% - 16px);
  }

  .hero-content,
  .hero-panel,
  .section {
    padding: 20px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}