:root {
  --bg: #050608;
  --panel: #0f1117;
  --panel-alt: #11131c;
  --border: #1f2533;
  --grid: rgba(255, 255, 255, 0.03);
  --text: #f5f6f7;
  --muted: #98a2b3;
  --accent: #ff8b3d;
  --accent-alt: #42f0c8;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  --radius: 16px;
  color-scheme: dark;
}

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

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.65;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(66, 240, 200, 0.1), transparent 50%),
    radial-gradient(circle at 80% 0%, rgba(255, 139, 61, 0.1), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 1;
}

.theme-industrial {
  position: relative;
  z-index: 0;
}

.shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.panel {
  background: linear-gradient(130deg, var(--panel), var(--panel-alt));
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 32px;
}

.site-header {
  padding: 32px 24px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo .dot {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(145deg, var(--accent), var(--accent-alt));
  box-shadow: 0 0 20px rgba(255, 139, 61, 0.9);
}

.logo strong {
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.logo p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

nav {
  display: flex;
  gap: 12px;
  font-size: 0.95rem;
}

nav a {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

nav a:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text);
}

nav a[aria-current="page"] {
  border-color: var(--accent);
  color: var(--text);
}

main {
  padding-bottom: 80px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}

.hero-label {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent-alt);
  margin: 0 0 12px;
}

.hero-text h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.hero-text p {
  margin: 0 0 16px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 20px 0 24px;
  padding: 16px 0 0;
  border-top: 1px solid var(--border);
}

.author-chip {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-chip.large {
  gap: 18px;
}

.author-chip img {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.author-chip.large img {
  width: 90px;
  height: 90px;
}

.author-chip p {
  margin: 0;
  font-weight: 600;
}

.author-chip span {
  font-size: 0.9rem;
  color: var(--muted);
}

.publish-date {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  border-radius: 999px;
  padding: 12px 30px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.85rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), #ffba66);
  color: #151515;
  box-shadow: 0 12px 25px rgba(255, 139, 61, 0.4);
}

.btn.ghost {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text);
  background: transparent;
}

.btn:hover {
  transform: translateY(-2px);
}

.hero-card .card-label {
  margin: 0 0 12px;
  color: var(--muted);
  letter-spacing: 0.18em;
  font-size: 0.8rem;
}

.hero-card h3 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.hero-card p {
  margin: 0 0 14px;
  color: var(--muted);
}

.hero-card-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 12px;
}

.metric-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
}

.metric-value {
  display: block;
  font-size: 1.2rem;
  color: var(--text);
  margin-top: 4px;
}

.section {
  margin-top: 48px;
}

.section-heading {
  margin-bottom: 22px;
}

.section-label {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent-alt);
}

.section-heading h2 {
  margin: 10px 0 0;
  font-size: 1.9rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.post-card {
  background: linear-gradient(150deg, #10131b, #0d0f15);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
}

.post-card .post-tag {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.post-card h3 {
  margin: 0;
  font-size: 1.2rem;
}

.post-card p {
  margin: 0;
  color: var(--muted);
}

.post-card .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.post-card .metric {
  background: rgba(66, 240, 200, 0.08);
  border: 1px solid rgba(66, 240, 200, 0.35);
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 0.75rem;
}

.text-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover {
  color: #ffc073;
}

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

.notes {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #090a0f;
  box-shadow: var(--shadow);
}

.notes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: "Fira Code", "Cascadia Code", Consolas, monospace;
  color: var(--accent-alt);
}

.notes-list li {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
}

.site-footer {
  padding: 32px 24px 80px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--accent);
  text-decoration: none;
}

.noscript {
  margin: 24px auto;
  max-width: 780px;
  background: rgba(255, 139, 61, 0.08);
  border: 1px solid rgba(255, 139, 61, 0.3);
  color: var(--text);
  border-radius: 8px;
  padding: 12px 16px;
}

code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Fira Code", Consolas, monospace;
  font-size: 0.85rem;
}

/* ARTICLE */
.article-main {
  display: grid;
  grid-template-columns: minmax(0, 2.4fr) minmax(260px, 1fr);
  gap: 28px;
  padding-bottom: 80px;
}

.post {
  padding: 36px;
  background: linear-gradient(150deg, #0f1117, #090a0f);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.post-header h1 {
  margin: 8px 0 12px;
  font-size: clamp(2.2rem, 4vw, 3rem);
}

.post-figure {
  margin: 28px 0 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.post-figure img {
  width: 100%;
  display: block;
  object-fit: cover;
}

.post-figure figcaption {
  margin: 0;
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--muted);
  background: #08090e;
}

.post-body {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.post-body p {
  margin: 0;
  color: var(--text);
}

.subheading {
  font-size: 1.4rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-alt);
  margin: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.feature-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.02);
}

.feature-card strong {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.feature-card h3 {
  margin: 6px 0 10px;
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.attachment-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
}

.attachment-card figure {
  margin: 0;
}

.attachment-card img {
  width: 100%;
  display: block;
  object-fit: cover;
}

.attachment-card .attachment-content {
  padding: 18px 20px 22px;
}

.attachment-card h4 {
  margin: 0 0 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-alt);
}

.attachment-card p {
  margin: 0;
  color: var(--muted);
}

.article-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #090a0f;
  box-shadow: var(--shadow);
}

.suggestions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--muted);
}

.suggestions a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.suggestions p {
  margin: 4px 0 0;
  color: var(--muted);
}

/* ABOUT */
.about-main {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-bottom: 80px;
}

.about-hero p {
  margin: 16px 0 0;
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.plain-list {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.timeline {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--muted);
}

.timeline-date {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-right: 8px;
}

.timeline li {
  border-left: 2px solid var(--border);
  padding-left: 14px;
}

.contact {
  text-align: center;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin: 16px 0;
}

.contact-tip {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-main {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 0 16px;
  }

  .panel,
  .post,
  .card,
  .notes {
    padding: 24px;
  }

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

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