:root {
  --bg-void: #0B1026;
  --bg-deep: #121A3A;
  --bg-card: #161F45;
  --bg-card-hover: #1C2852;
  --gold: #F5C451;
  --gold-deep: #E67E22;
  --silver: #CDD6F5;
  --ink: #F0F4FF;
  --ink-dim: #9AA6C8;
  --purple-deep: #3A0CA3;
  --blue-deep: #1A2A6C;
  --error: #FF6B6B;
  --success: #2DD4BF;
  --info: #38BDF8;
  --line: rgba(205, 214, 245, 0.14);
  --line-strong: rgba(245, 196, 81, 0.4);
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 18px rgba(245, 196, 81, 0.08);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --shell-max: 1280px;
  --shell-pad: clamp(16px, 4vw, 48px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 10px;
  --radius-lg: 20px;
  --header-h: 68px;
  --transition: 0.3s var(--ease);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-void);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(26, 42, 108, 0.55), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(58, 12, 163, 0.35), transparent 60%),
    var(--bg-void);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(205, 214, 245, 0.35), transparent 100%),
    radial-gradient(1px 1px at 70% 60%, rgba(205, 214, 245, 0.25), transparent 100%),
    radial-gradient(1.5px 1.5px at 30% 85%, rgba(245, 196, 81, 0.2), transparent 100%),
    radial-gradient(1px 1px at 90% 30%, rgba(205, 214, 245, 0.3), transparent 100%),
    radial-gradient(1.5px 1.5px at 50% 15%, rgba(245, 196, 81, 0.16), transparent 100%),
    radial-gradient(1px 1px at 15% 50%, rgba(205, 214, 245, 0.2), transparent 100%),
    radial-gradient(1px 1px at 80% 80%, rgba(56, 189, 248, 0.15), transparent 100%),
    radial-gradient(1.5px 1.5px at 5% 95%, rgba(205, 214, 245, 0.18), transparent 100%);
  pointer-events: none;
}

img,
svg,
video,
canvas {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--silver);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--gold);
}

button {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: rgba(245, 196, 81, 0.3);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  background: var(--gold);
  color: var(--bg-void);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 4px;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: none;
  box-shadow: 0 4px 16px rgba(245, 196, 81, 0.4);
}

.site-shell {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.commandbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 16, 38, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.commandbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent 5%, rgba(245, 196, 81, 0.6) 30%, transparent 70%);
}

.commandbar-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: var(--header-h);
  position: relative;
}

.brand-link {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.brand-star {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff, var(--gold) 60%, var(--gold-deep) 100%);
  box-shadow: 0 0 12px rgba(245, 196, 81, 0.5), inset -2px -2px 4px rgba(0, 0, 0, 0.25);
  flex-shrink: 0;
}

.brand-star::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px dashed rgba(245, 196, 81, 0.45);
  animation: star-orbit 12s linear infinite;
}

@keyframes star-orbit {
  to {
    transform: rotate(360deg);
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-zh {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--ink);
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.brand-link:hover .brand-zh {
  color: var(--gold);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  margin-left: auto;
  flex-shrink: 0;
  place-items: center;
}

.nav-toggle-bar {
  position: absolute;
  width: 22px;
  height: 2px;
  background: var(--silver);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), top 0.3s var(--ease);
}

.nav-toggle-bar:nth-child(1) {
  top: 14px;
}

.nav-toggle-bar:nth-child(2) {
  top: 21px;
}

.nav-toggle-bar:nth-child(3) {
  top: 28px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  top: 21px;
  transform: rotate(45deg);
  background: var(--gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  top: 21px;
  transform: rotate(-45deg);
  background: var(--gold);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1vw, 18px);
  flex: 1;
  justify-content: center;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--ink-dim);
  padding: 6px 10px;
  position: relative;
  white-space: nowrap;
  transition: color 0.25s var(--ease);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: -2px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav a[aria-current="page"] {
  color: var(--gold);
  text-shadow: 0 0 8px rgba(245, 196, 81, 0.3);
}

.status-orbit {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 30px;
  background: rgba(56, 189, 248, 0.06);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
}

.status-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(45, 212, 191, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(45, 212, 191, 0);
  }
}

.status-time {
  color: var(--silver);
  font-variant-numeric: tabular-nums;
  margin-left: 2px;
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  z-index: 1200;
  background: transparent;
  pointer-events: none;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--blue-deep), var(--gold-deep), var(--gold));
}

.site-footer {
  background:
    radial-gradient(ellipse 50% 70% at 10% 100%, rgba(58, 12, 163, 0.18), transparent 60%),
    radial-gradient(ellipse 40% 60% at 90% 90%, rgba(26, 42, 108, 0.25), transparent 60%),
    var(--bg-void);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr 1.2fr;
  gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(44px, 6vw, 76px);
  padding-bottom: clamp(40px, 5vw, 64px);
}

.footer-brand .brand-link-footer {
  margin-bottom: 18px;
}

.footer-note {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.8;
  max-width: 32ch;
}

.footer-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 1px;
  background: rgba(245, 196, 81, 0.4);
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
}

.footer-col a,
.footer-address,
.footer-icp,
.footer-service {
  color: var(--ink-dim);
  line-height: 1.5;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--gold);
}

.footer-address,
.footer-icp,
.footer-service {
  color: rgba(154, 166, 200, 0.8);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-block: 18px;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
}

.backtop {
  position: fixed;
  z-index: 1100;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--bg-void);
  background: radial-gradient(circle at 35% 35%, #fff, var(--gold) 60%, var(--gold-deep) 100%);
  box-shadow: 0 4px 14px rgba(245, 196, 81, 0.35), 0 8px 24px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s;
  pointer-events: none;
}

.backtop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.backtop::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px dashed rgba(245, 196, 81, 0.4);
}

.backtop:hover {
  box-shadow: 0 6px 20px rgba(245, 196, 81, 0.5), 0 12px 32px rgba(0, 0, 0, 0.5);
}

main#main-content {
  min-height: 70vh;
  padding-bottom: clamp(40px, 6vw, 96px);
}

.page-shell {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 72px) var(--shell-pad) 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  margin-bottom: clamp(28px, 4vw, 56px);
}

.breadcrumb a {
  color: var(--ink-dim);
}

.breadcrumb a:hover {
  color: var(--gold);
}

.breadcrumb span[aria-current="page"] {
  color: var(--gold);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: block;
  margin-bottom: 8px;
}

.title-zh {
  font-size: clamp(36px, 7vw, 88px);
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1.08;
  color: var(--ink);
  font-family: var(--font-sans);
}

.title-zh strong {
  font-weight: 800;
  color: var(--gold);
}

.title-en {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-top: 10px;
}

.font-gold {
  color: var(--gold);
}

.font-silver {
  color: var(--silver);
}

.font-dim {
  color: var(--ink-dim);
}

.font-success {
  color: var(--success);
}

.font-info {
  color: var(--info);
}

.section-lead {
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.8;
  color: var(--ink-dim);
  max-width: 60ch;
}

.lead-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow);
}

.lead-card p {
  color: var(--ink-dim);
  line-height: 1.8;
}

.lead-card .section-lead {
  margin-bottom: 8px;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(12px, 2vw, 20px);
}

.bento-card {
  position: relative;
  background: linear-gradient(145deg, rgba(22, 31, 69, 0.95), rgba(18, 26, 58, 0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.bento-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 196, 81, 0.4), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.bento-card:hover {
  border-color: rgba(245, 196, 81, 0.25);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.bento-card:hover::before {
  opacity: 1;
}

.metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 700;
  color: var(--gold);
  background: rgba(245, 196, 81, 0.08);
  border: 1px solid rgba(245, 196, 81, 0.25);
  border-radius: 8px;
  padding: 6px 14px;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

.metric-chip-small {
  font-size: 14px;
  padding: 4px 10px;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--info);
  background: rgba(56, 189, 248, 0.06);
}

.tag-gold {
  border-color: rgba(245, 196, 81, 0.3);
  color: var(--gold);
  background: rgba(245, 196, 81, 0.06);
}

.tag-success {
  border-color: rgba(45, 212, 191, 0.3);
  color: var(--success);
  background: rgba(45, 212, 191, 0.06);
}

.data-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(205, 214, 245, 0.08);
  font-size: 14px;
}

.data-line:last-child {
  border-bottom: none;
}

.data-line-key {
  color: var(--ink-dim);
}

.data-line-value {
  font-family: var(--font-mono);
  color: var(--silver);
  font-variant-numeric: tabular-nums;
}

.data-line-value.gold {
  color: var(--gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: 6px;
  padding: 12px 28px;
  color: var(--bg-void);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  box-shadow: 0 2px 10px rgba(245, 196, 81, 0.25);
}

.btn-gold:hover {
  box-shadow: 0 6px 18px rgba(245, 196, 81, 0.4);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--silver);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: rgba(245, 196, 81, 0.4);
  color: var(--gold);
  transform: translateY(-2px);
}

.orbital-line {
  position: absolute;
  border-top: 1px solid rgba(205, 214, 245, 0.15);
  height: 1px;
  pointer-events: none;
}

.orbital-line::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  top: -2px;
  right: 0;
  box-shadow: 0 0 6px rgba(245, 196, 81, 0.6);
}

.image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #1A2A6C, #3A0CA3);
  border: 1px solid var(--line);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-frame::before {
  content: "IMG";
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  color: rgba(205, 214, 245, 0.4);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(205, 214, 245, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(205, 214, 245, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.3;
  pointer-events: none;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 60ch;
  }

  .site-nav {
    gap: 4px;
  }

  .site-nav a {
    font-size: 12px;
    padding: 5px 8px;
  }

  .status-orbit .status-text {
    display: none;
  }
}

@media (max-width: 768px) {
  .commandbar-inner {
    gap: 8px;
  }

  .nav-toggle {
    display: grid;
  }

  .status-orbit {
    padding: 4px 10px;
    font-size: 11px;
  }

  .site-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(11, 16, 38, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 8px var(--shell-pad) 16px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    max-height: none;
  }

  .site-nav[data-open] {
    display: flex;
  }

  .site-nav a {
    font-size: 16px;
    padding: 14px 10px;
    width: 100%;
    border-bottom: 1px solid rgba(205, 214, 245, 0.06);
  }

  .site-nav a::after {
    right: auto;
    left: 10px;
    bottom: 4px;
  }

  .site-nav a[aria-current="page"] {
    padding-left: 16px;
    background: linear-gradient(90deg, rgba(245, 196, 81, 0.08), transparent);
  }

  .status-text {
    display: none;
  }

  .status-time {
    font-size: 11px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: auto;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .brand-star::after {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }

  .backtop {
    transition: none;
  }
}

@media (max-width: 480px) {
  .brand-en {
    display: none;
  }

  .status-time {
    font-size: 10px;
  }

  .status-orbit {
    padding: 4px 8px;
  }

  .logo-star {
    width: 26px;
    height: 26px;
  }
}