:root {
  color-scheme: dark;
  --bg: #090d14;
  --panel: rgba(15, 22, 34, 0.82);
  --panel-strong: rgba(21, 31, 48, 0.92);
  --ink: #edf6ff;
  --muted: #94a5ba;
  --faint: #627086;
  --line: rgba(140, 180, 218, 0.18);
  --cyan: #22d3ee;
  --blue: #5b7cfa;
  --green: #46e6a6;
  --warm: #f6b35c;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 0%, rgba(34, 211, 238, 0.2), transparent 30%),
    radial-gradient(circle at 82% 18%, rgba(91, 124, 250, 0.18), transparent 28%),
    linear-gradient(135deg, #080b12 0%, #101724 46%, #0c111b 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(rgba(148, 165, 186, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 165, 186, 0.07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000, transparent 86%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  backdrop-filter: blur(18px);
}

.brand {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0;
}

.top-nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

.top-nav a {
  transition: color 160ms ease;
}

.top-nav a:hover {
  color: var(--cyan);
}

.page-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0 76px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 42px;
  padding: 42px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 44%),
    var(--panel);
  box-shadow: var(--shadow);
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46%;
  height: 3px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--cyan), var(--warm));
}

.hero-profile {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 18px;
}

.avatar-frame {
  position: relative;
  width: min(100%, 218px);
  aspect-ratio: 1;
  padding: 9px;
  border: 1px solid rgba(34, 211, 238, 0.38);
  border-radius: 50%;
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    conic-gradient(from 120deg, var(--cyan), var(--blue), var(--warm), var(--cyan)) border-box;
}

.avatar-frame::before {
  position: absolute;
  inset: -12px;
  content: "";
  border: 1px solid rgba(34, 211, 238, 0.16);
  border-radius: inherit;
}

.avatar {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 34px;
  padding: 0 13px;
  color: var(--muted);
  font-size: 0.86rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
}

.signal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 16px rgba(70, 230, 166, 0.78);
}

.hero-copy {
  align-self: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(2.35rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.intro {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.9;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  color: var(--ink);
  font-weight: 750;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.action-link:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.58);
  background: rgba(34, 211, 238, 0.09);
}

.action-link.primary {
  color: #061018;
  border-color: transparent;
  background: linear-gradient(135deg, var(--cyan), #86f2ff);
}

.content-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 16px;
}

.side-block {
  display: grid;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(15, 22, 34, 0.58);
}

.side-block a,
.side-block p {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.side-block p {
  margin-bottom: 0;
  line-height: 1.7;
}

.side-label {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.post-feed {
  display: grid;
  gap: 14px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  padding: 0 4px 8px;
}

.section-heading h2 {
  margin-bottom: 0;
  font-size: 1.6rem;
  letter-spacing: 0;
}

.post-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(34, 211, 238, 0.08), transparent 38%),
    var(--panel-strong);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.44);
  background:
    linear-gradient(90deg, rgba(34, 211, 238, 0.12), transparent 42%),
    rgba(23, 34, 52, 0.96);
}

.post-card::before {
  position: absolute;
  top: 24px;
  left: 0;
  width: 3px;
  height: 38px;
  content: "";
  background: linear-gradient(var(--cyan), var(--blue));
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--faint);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.post-title {
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 1.26rem;
  font-weight: 800;
  line-height: 1.45;
}

.post-card p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.8;
}

@media (max-width: 860px) {
  .site-header,
  .page-shell {
    width: min(100% - 28px, 1120px);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 30px;
  }

  .hero-profile {
    justify-items: start;
  }

  .avatar-frame {
    width: 170px;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 620px) {
  .site-header {
    min-height: 62px;
  }

  .top-nav {
    gap: 14px;
    font-size: 0.86rem;
  }

  .page-shell {
    padding-top: 22px;
  }

  .hero {
    padding: 22px;
  }

  h1 {
    font-size: clamp(2.2rem, 13vw, 3.2rem);
  }

  .quick-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

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

  .section-heading {
    display: block;
  }

  .post-card {
    padding: 20px;
  }
}

@media (max-width: 420px) {
  .top-nav a:nth-child(2) {
    display: none;
  }

  .quick-links {
    grid-template-columns: 1fr;
  }
}