:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #101114;
  --text: #f7f7f3;
  --muted: #b9c0c9;
  --line: rgba(255, 255, 255, 0.18);
  --cyan: #5fc8c8;
  --gold: #d4b16a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(95, 200, 200, 0.16), transparent 28rem),
    linear-gradient(180deg, #070707 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 72px;
  padding: 0 5vw;
  background: rgba(5, 5, 5, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.08rem;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: #000;
  color: var(--cyan);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.top-nav a {
  padding: 0.45rem 0;
  border-bottom: 1px solid transparent;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] {
  color: var(--text);
  border-color: var(--cyan);
}

main {
  width: min(1180px, 90vw);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 3rem;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 5rem 0 3rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.15rem;
  color: var(--text);
  font-size: clamp(3.2rem, 8vw, 7rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0.8rem;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.45rem;
  font-size: 1.18rem;
}

.lead {
  max-width: 650px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

code {
  color: var(--cyan);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  font-weight: 800;
}

.primary-action {
  background: var(--cyan);
  color: #041111;
}

.secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: #000;
}

.hero-panel,
.doc-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 17, 20, 0.86);
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.38);
}

.hero-panel {
  padding: 1rem;
}

.realm-card {
  min-height: 230px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(95, 200, 200, 0.16), transparent 46%),
    #000;
}

.realm-card strong {
  display: block;
  margin: 1rem 0 0.7rem;
  color: var(--gold);
  font-size: 1.65rem;
  line-height: 1.25;
}

.card-label {
  color: var(--muted);
  font-size: 0.92rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.stat-grid div,
.status-list li,
.feature-grid article,
.notice,
.contact-list div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.stat-grid div {
  min-height: 94px;
  padding: 1rem;
}

.stat-grid span,
.status-list span,
.contact-list dt {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.stat-grid strong,
.status-list strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.15rem;
}

.section {
  padding: 4.5rem 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 1.5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.feature-grid article {
  min-height: 185px;
  padding: 1.35rem;
}

.feature-grid p,
.notice p,
.split-section p,
.contact-section p,
.doc-card p,
.doc-card li {
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 2rem;
  align-items: start;
}

.status-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.status-list li {
  padding: 1rem;
}

.notice-section {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.notice {
  padding: 1.4rem;
}

.notice:first-child {
  border-color: rgba(212, 177, 106, 0.4);
}

.notice:last-child {
  border-color: rgba(95, 200, 200, 0.42);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 2rem;
  align-items: start;
  padding-bottom: 6rem;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 0;
}

.contact-list div {
  min-height: 95px;
  padding: 1rem;
}

.contact-list dd {
  margin: 0.35rem 0 0;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 5vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #030303;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  margin-right: 1rem;
  color: var(--text);
}

.doc-page {
  width: min(920px, 90vw);
  padding: 4rem 0 6rem;
}

.doc-card {
  padding: clamp(1.4rem, 4vw, 3rem);
}

.doc-card h1 {
  font-size: clamp(2.3rem, 5vw, 4rem);
}

.doc-card h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.doc-meta {
  color: var(--muted);
}

@media (max-width: 880px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .top-nav {
    width: 100%;
    flex-wrap: wrap;
  }

  .hero,
  .split-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

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

  .notice-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  main,
  .doc-page {
    width: min(100% - 2rem, 920px);
  }

  h1 {
    font-size: 3rem;
  }

  .feature-grid,
  .status-list,
  .contact-list,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}