:root {
  --color-deep: #0A1B3A;
  --color-deep-up: #11295C;
  --color-metal: #C7D3E0;
  --color-silver: #E8EEF5;
  --color-cyan: #00FFC6;
  --color-cyan-deep: #00B386;
  --color-ink: #0B1016;
  --color-paper: #F3EBDD;
  --color-blue-gray: #9AB3C8;
  --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --max-width: 1200px;
  --header-height: 76px;
  --radius-cut: 12px;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.45s cubic-bezier(0.23, 1, 0.32, 1);
  --shadow-panel: 0 24px 60px rgba(0, 0, 0, 0.35);
  --clip-corner: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-metal);
  background-color: var(--color-deep);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

ul,
ol {
  list-style: none;
}

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

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

button {
  font-family: var(--font-body);
  border: 0;
  cursor: pointer;
  background: transparent;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

::selection {
  background: var(--color-cyan);
  color: var(--color-deep);
}

/* ---------- Skip Link ---------- */
.skiplink {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 2000;
  padding: 12px 24px;
  background: var(--color-cyan);
  color: var(--color-deep);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 8px 8px;
  transition: top var(--transition-fast);
}

.skiplink:focus-visible {
  top: 0;
  outline-offset: 0;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.site-header.is-scrolled {
  background: rgba(10, 27, 58, 0.96);
  border-bottom-color: rgba(199, 211, 224, 0.14);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: var(--header-height);
}

/* Brand */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-silver);
  flex-shrink: 0;
}

.brand-mark:hover {
  color: var(--color-cyan);
}

.brand-symbol {
  display: grid;
  grid-template-columns: repeat(2, 8px);
  grid-template-rows: repeat(2, 8px);
  gap: 3px;
  width: 24px;
  height: 24px;
  transform: rotate(45deg);
}

.brand-symbol i {
  display: block;
  background: var(--color-cyan);
  border-radius: 2px;
  transition: background var(--transition-fast);
}

.brand-symbol i:nth-child(2) {
  background: var(--color-metal);
}

.brand-symbol i:nth-child(3) {
  background: var(--color-blue-gray);
}

.brand-symbol i:nth-child(4) {
  background: var(--color-silver);
}

.brand-mark:hover .brand-symbol i {
  background: var(--color-cyan);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--color-silver);
}

.brand-text small {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-blue-gray);
  margin-top: 2px;
}

/* Navigation desktop */
.main-nav {
  margin-left: auto;
}

.main-nav > ul {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-block;
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-metal);
  border-radius: 6px 6px 0 0;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--color-cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-silver);
  background: rgba(199, 211, 224, 0.08);
  transform: translateY(-1px);
}

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

.nav-link[aria-current="page"] {
  color: var(--color-cyan);
  text-shadow: 0 0 18px rgba(0, 255, 198, 0.3);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(0, 255, 198, 0.08);
  border: 1px solid rgba(0, 255, 198, 0.35);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.search-shortcut:hover {
  background: var(--color-cyan);
  color: var(--color-deep);
  border-color: var(--color-cyan);
}

.search-icon {
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
}

.search-icon::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 2px;
  background: currentColor;
  transform: rotate(45deg);
  right: -5px;
  bottom: -3px;
  border-radius: 2px;
}

/* Nav toggle mobile */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 10px 14px;
  background: rgba(199, 211, 224, 0.08);
  border: 1px solid rgba(199, 211, 224, 0.2);
  border-radius: 8px;
  min-width: 52px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-metal);
  transition: transform var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-blue-gray);
  margin-top: 2px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--color-cyan);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--color-cyan);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-blue-gray);
  position: relative;
  border-top: 1px solid rgba(0, 255, 198, 0.12);
  margin-top: 0;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-cyan) 20%, var(--color-metal) 70%, transparent);
  opacity: 0.5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.4fr 1fr;
  gap: 48px;
  padding: 64px 0 40px;
}

.footer-brand-name {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--color-silver);
}

.footer-brand-desc {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-cyan);
  margin-top: 4px;
  margin-bottom: 20px;
}

.footer-trust {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-blue-gray);
  max-width: 320px;
  border-left: 2px solid var(--color-cyan);
  padding-left: 16px;
}

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-silver);
  text-transform: uppercase;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--color-cyan);
}

.footer-links li,
.footer-contact li,
.footer-legal li {
  margin-bottom: 10px;
}

.footer-links a,
.footer-legal a,
.footer-contact a {
  color: var(--color-blue-gray);
  font-size: 14px;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover,
.footer-legal a:hover,
.footer-contact a:hover {
  color: var(--color-cyan);
  padding-left: 4px;
}

.footer-contact li {
  font-size: 14px;
  line-height: 1.7;
}

.footer-contact a {
  color: var(--color-cyan);
}

.footer-legal .copyright {
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(154, 179, 200, 0.6);
  border-top: 1px solid rgba(154, 179, 200, 0.14);
  padding-top: 16px;
}

/* ---------- Main content general ---------- */
#main-content {
  min-height: 60vh;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-blue-gray);
  position: relative;
}

.breadcrumb::before {
  content: "░";
  color: var(--color-cyan);
  margin-right: 4px;
}

.crumb-link {
  color: var(--color-blue-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.crumb-link:hover {
  color: var(--color-cyan);
}

.crumb-sep {
  color: rgba(154, 179, 200, 0.4);
}

.crumb-current {
  color: var(--color-silver);
}

/* Page title block */
.page-title-block {
  padding: 48px 0 32px;
  position: relative;
  border-bottom: 1px solid rgba(199, 211, 224, 0.1);
  margin-bottom: 48px;
}

.page-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
  margin-bottom: 12px;
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 255, 198, 0.08);
  border-left: 2px solid var(--color-cyan);
}

.page-title-block h1 {
  font-family: var(--font-title);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.15;
  color: var(--color-silver);
  letter-spacing: 0.02em;
}

.page-summary {
  margin-top: 16px;
  max-width: 640px;
  font-size: 16px;
  color: var(--color-blue-gray);
  line-height: 1.7;
}

/* Buttons */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-body);
  line-height: 1;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background: var(--color-cyan);
  color: var(--color-deep);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.btn-primary:hover {
  background: var(--color-silver);
  color: var(--color-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 255, 198, 0.25);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-metal);
  color: var(--color-metal);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.btn-ghost:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 255, 198, 0.15);
}

/* Grid */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.col-span-4 {
  grid-column: span 4;
}

.col-span-6 {
  grid-column: span 6;
}

.col-span-8 {
  grid-column: span 8;
}

/* Archival list component */
.archival-list {
  border-top: 1px solid rgba(199, 211, 224, 0.12);
}

.archival-item {
  border-bottom: 1px solid rgba(199, 211, 224, 0.12);
  padding: 24px 0;
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 20px;
  align-items: start;
  transition: background var(--transition-fast), padding-left var(--transition-fast);
}

.archival-item:hover {
  background: rgba(0, 255, 198, 0.03);
  padding-left: 8px;
}

.item-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-cyan);
  opacity: 0.7;
  padding-top: 4px;
}

.item-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-blue-gray);
  margin-top: 2px;
  white-space: nowrap;
}

.state-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-cyan);
  display: inline-block;
  animation: pulse 1.8s ease-out infinite;
}

.state-pulse.is-muted {
  background: var(--color-blue-gray);
  animation: none;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 255, 198, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(0, 255, 198, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 198, 0);
  }
}

.item-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-silver);
}

.item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.item-meta span {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(199, 211, 224, 0.06);
  border-radius: 999px;
  color: var(--color-blue-gray);
  border: 1px solid rgba(199, 211, 224, 0.12);
}

.item-detail {
  max-height: 0;
  overflow: hidden;
  grid-column: 2 / span 2;
  transition: max-height 0.45s ease, margin-top 0.45s ease, opacity 0.4s ease;
  opacity: 0;
  font-size: 14px;
  color: var(--color-blue-gray);
  line-height: 1.7;
}

.archival-item[data-expand-open] .item-detail {
  max-height: 400px;
  margin-top: 16px;
  opacity: 1;
}

/* Skill tree */
.skill-tree {
  margin: 32px 0;
  position: relative;
}

.skill-node {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-left: 1px solid rgba(0, 255, 198, 0.3);
  padding-left: 32px;
  position: relative;
  margin-left: 20px;
}

.skill-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 32px;
  width: 9px;
  height: 9px;
  background: var(--color-cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 16px rgba(0, 255, 198, 0.5);
}

.skill-step {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--color-blue-gray);
  text-transform: uppercase;
  padding-top: 4px;
}

.skill-step strong {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-cyan);
  margin-top: 4px;
}

.skill-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-silver);
  margin-bottom: 8px;
}

.skill-content p {
  font-size: 14px;
  color: var(--color-blue-gray);
  max-width: 560px;
}

.skill-connector {
  position: absolute;
  left: 20px;
  width: 1px;
  top: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--color-cyan), rgba(0, 255, 198, 0.1));
  z-index: -1;
}

/* Data card */
.data-card {
  background: linear-gradient(145deg, rgba(17, 41, 92, 0.7), rgba(10, 27, 58, 0.9));
  border: 1px solid rgba(199, 211, 224, 0.14);
  padding: 24px;
  clip-path: var(--clip-corner);
  position: relative;
  transition: transform var(--transition-smooth), border-color var(--transition-fast), box-shadow var(--transition-smooth);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 255, 198, 0.4);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.3);
}

.data-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 40px;
  border-top: 2px solid var(--color-cyan);
  border-right: 2px solid var(--color-cyan);
  opacity: 0.5;
}

.card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue-gray);
  padding: 4px 0;
  display: block;
}

.card-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-cyan);
  margin-top: 10px;
  letter-spacing: 0.03em;
}

/* Terminal panel */
.terminal-panel {
  background: var(--color-ink);
  border: 1px solid rgba(0, 255, 198, 0.2);
  border-radius: 4px;
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-metal);
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.4);
  position: relative;
}

.terminal-panel::before {
  content: "REC // YUN·PORTAL";
  display: block;
  font-size: 11px;
  color: var(--color-cyan);
  border-bottom: 1px solid rgba(0, 255, 198, 0.15);
  padding-bottom: 12px;
  margin-bottom: 16px;
  letter-spacing: 0.12em;
}

.terminal-line {
  display: block;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-prompt {
  color: var(--color-cyan);
}

/* TOC panel */
.toc-panel {
  background: rgba(17, 41, 92, 0.4);
  border: 1px solid rgba(199, 211, 224, 0.12);
  padding: 24px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  position: sticky;
  top: calc(var(--header-height) + 24px);
  margin-bottom: 40px;
}

.toc-panel h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-silver);
  margin-bottom: 16px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.toc-panel ul li {
  margin-bottom: 6px;
}

.toc-panel ul a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-blue-gray);
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.toc-panel ul a:hover {
  color: var(--color-cyan);
  border-left-color: var(--color-cyan);
  background: rgba(0, 255, 198, 0.04);
}

.toc-panel ul a[data-toc-current] {
  color: var(--color-cyan);
  border-left-color: var(--color-cyan);
}

/* Image placeholder frame */
.img-frame-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(145deg, rgba(17, 41, 92, 0.8), rgba(10, 27, 58, 0.9));
  border: 1px solid rgba(199, 211, 224, 0.16);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-frame-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent 0 18px, rgba(0, 255, 198, 0.04) 18px 20px);
}

.img-frame-placeholder::after {
  content: "IMG";
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: rgba(154, 179, 200, 0.6);
  border: 1px solid rgba(199, 211, 224, 0.2);
  padding: 12px 18px;
  transform: rotate(-4deg);
  z-index: 1;
  background: rgba(10, 27, 58, 0.5);
}

/* Scroll progress bar */
.progress-track {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  z-index: 1500;
  pointer-events: none;
  background: rgba(199, 211, 224, 0.12);
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-silver));
  box-shadow: 0 0 12px rgba(0, 255, 198, 0.4);
  transition: width 0.1s linear;
}

/* Reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .col-span-4,
  .col-span-6,
  .col-span-8 {
    grid-column: span 12;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    gap: 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 1200;
    background: rgba(10, 27, 58, 0.98);
    border-bottom: 1px solid rgba(0, 255, 198, 0.25);
    padding: 16px 24px 32px;
    transform: translateY(-16px);
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .main-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .main-nav > ul {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-link {
    display: block;
    padding: 14px 18px;
    font-size: 17px;
    border-left: 2px solid transparent;
    background: rgba(199, 211, 224, 0.04);
    border-radius: 8px 0 0 8px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(0, 255, 198, 0.08);
    border-left: 2px solid var(--color-cyan);
  }

  .nav-link:hover {
    background: rgba(0, 255, 198, 0.06);
    transform: none;
  }

  .search-shortcut .search-label {
    display: none;
  }

  .search-shortcut {
    padding: 10px 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 48px 0 32px;
  }

  .footer-trust {
    max-width: 100%;
  }

  .archival-item {
    grid-template-columns: 48px 1fr;
    gap: 12px;
  }

  .item-status {
    grid-column: 2;
    margin-top: -8px;
  }

  .item-detail {
    grid-column: 2;
  }

  .skill-node {
    grid-template-columns: 72px 1fr;
    gap: 16px;
    padding-left: 24px;
    margin-left: 12px;
  }
}

@media (max-width: 640px) {
  .container {
    padding-inline: 18px;
  }

  .brand-text small {
    display: none;
  }

  .brand-text strong {
    font-size: 16px;
  }

  .brand-symbol {
    width: 20px;
    height: 20px;
    grid-template-columns: repeat(2, 6px);
    grid-template-rows: repeat(2, 6px);
  }

  .brand-symbol i {
    border-radius: 1px;
  }

  .page-title-block {
    padding: 32px 0 24px;
    margin-bottom: 32px;
  }

  .page-title-block h1 {
    font-size: 28px;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
    padding: 14px 18px;
  }

  .grid-12 {
    gap: 16px;
  }

  .data-card {
    padding: 18px;
  }

  .terminal-panel {
    padding: 18px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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

  .state-pulse {
    animation: none;
  }

  .progress-bar {
    transition: none;
  }
}