/* ============ RESET & TOKENS ============ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #00F0FF;
  --color-secondary: #B537F2;
  --color-accent: #FFD700;
  --color-bg: #0A0E17;
  --color-panel: #131A26;
  --color-panel-light: #1A2332;
  --color-text: #E6E8EC;
  --color-muted: #8A93A5;
  --color-border: #1F2A3A;
  --color-gradient: #6C4DF6;
  --color-success: #00E58E;
  --font-heading: 'Orbitron', 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'SF Mono', 'Consolas', 'Courier New', monospace;
  --container: 1320px;
  --status-h: 36px;
  --header-h: 72px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --glow-primary: 0 0 12px rgba(0, 240, 255, 0.35);
  --glow-secondary: 0 0 12px rgba(181, 55, 242, 0.35);
  --z-header: 100;
  --z-overlay: 150;
  --z-nav: 200;
  --z-top: 300;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin-bottom: 0.5em;
}

h1 { font-size: clamp(30px, 5vw, 48px); font-weight: 900; }
h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; }
h3 { font-size: 18px; font-weight: 700; }
h4 { font-size: 15px; font-weight: 700; }

p {
  margin-bottom: 1em;
}

ul, ol {
  padding-left: 1.4em;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

::selection {
  background: rgba(0, 240, 255, 0.3);
  color: var(--color-text);
}

/* ============ LAYOUT ============ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

#main-content {
  min-height: 60vh;
}

.content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(0, 240, 255, 0.35);
  text-underline-offset: 3px;
  transition: color 0.25s, text-decoration-color 0.25s;
}

.content a:hover {
  color: var(--color-accent);
  text-decoration-color: currentColor;
}

/* ============ GRID ============ */
.grid {
  display: grid;
  gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2-1 { grid-template-columns: 2fr 1fr; }
.grid--1-2 { grid-template-columns: 1fr 2fr; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s, background 0.25s, box-shadow 0.25s, transform 0.25s;
}

.btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-primary);
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #07101A;
}

.btn--primary:hover {
  background: transparent;
  color: var(--color-primary);
}

.btn--secondary {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #07101A;
}

.btn--secondary:hover {
  background: transparent;
  color: var(--color-secondary);
  box-shadow: var(--glow-secondary);
}

/* ============ SKIP LINK ============ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 10px 18px;
  background: var(--color-primary);
  color: #07101A;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
  top: 0;
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(10, 14, 23, 0.97);
  border-bottom: 1px solid var(--color-border);
}

.site-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 60%, transparent 100%);
  pointer-events: none;
}

.status-bar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.status-bar__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--status-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-bar__brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  white-space: nowrap;
}

.status-bar__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: var(--glow-primary);
  animation: pulse 2s ease-in-out infinite;
}

.status-bar__brand-text {
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-bar__region {
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.header-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 10px 16px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.25s, color 0.25s, background 0.25s, box-shadow 0.25s;
}

.nav-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-primary);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.nav-toggle__icon {
  width: 20px;
  height: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle__line {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.header-brand {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.header-brand__mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: #07101A;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}

.header-brand__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.header-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 215, 0, 0.06);
  border: 1px solid transparent;
  color: var(--color-accent);
  font-family: var(--font-data);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.25s, background 0.25s;
}

.header-live:hover {
  border-color: var(--color-accent);
  background: rgba(255, 215, 0, 0.12);
}

.header-live__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 1.6s ease-in-out infinite;
}

/* ============ SLIDE NAV ============ */
.slide-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: var(--z-nav);
  width: 400px;
  max-width: 88vw;
  display: flex;
  flex-direction: column;
  background: var(--color-panel);
  border-right: 2px solid var(--color-secondary);
  box-shadow: var(--shadow-lg);
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.slide-nav[data-open] {
  transform: translateX(0);
}

.slide-nav__header {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, rgba(181, 55, 242, 0.14) 0%, rgba(0, 240, 255, 0.03) 100%);
}

.slide-nav__kicker {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-secondary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.slide-nav__title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: 0.04em;
  margin: 0;
}

.slide-nav__nav {
  flex: 1;
  padding: 16px 0;
}

.slide-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.slide-nav__item + .slide-nav__item {
  border-top: 1px solid var(--color-border);
}

.slide-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 28px;
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.25s, color 0.25s, padding-left 0.25s;
}

.slide-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 28px;
  right: 100%;
  height: 2px;
  background: var(--color-primary);
  transition: right 0.3s;
}

.slide-nav__link:hover::after,
.slide-nav__link[aria-current="page"]::after {
  right: 28px;
}

.slide-nav__link:hover,
.slide-nav__link[aria-current="page"] {
  background: rgba(0, 240, 255, 0.05);
  color: var(--color-primary);
  padding-left: 36px;
}

.slide-nav__num {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-muted);
  min-width: 26px;
}

.slide-nav__name {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.slide-nav__en {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-secondary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.slide-nav__link[aria-current="page"] .slide-nav__num {
  color: var(--color-primary);
}

.slide-nav__footer {
  padding: 24px 28px;
  border-top: 2px solid var(--color-secondary);
  background: rgba(181, 55, 242, 0.05);
}

.slide-nav__status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
  margin-bottom: 14px;
}

.slide-nav__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px rgba(0, 229, 142, 0.5);
  animation: pulse 2s ease-in-out infinite;
}

.slide-nav__contact {
  display: inline-block;
  padding-bottom: 2px;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
  transition: color 0.25s, border-color 0.25s;
}

.slide-nav__contact:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(6, 8, 14, 0.72);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s, visibility 0.35s;
}

.nav-overlay[data-open] {
  opacity: 1;
  visibility: visible;
}

/* ============ FOOTER ============ */
.site-footer {
  position: relative;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 55%, transparent 100%);
}

.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.5fr;
  gap: 48px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 18px;
}

.footer-brand__mark {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #07101A;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 900;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.05em;
}

.site-footer__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 360px;
  margin-bottom: 12px;
}

.site-footer__trust {
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-secondary);
  border-left: 2px solid var(--color-secondary);
  padding-left: 12px;
  max-width: 360px;
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.site-footer__heading::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--color-primary);
}

.site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__list li {
  margin-bottom: 10px;
}

.site-footer__list a {
  display: inline-block;
  color: var(--color-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.25s, transform 0.25s;
}

.site-footer__list a:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

.site-footer__contact p {
  font-family: var(--font-data);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  background: #081019;
  padding: 16px 0;
}

.site-footer__bottom-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer__copy {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
}

.site-footer__legal {
  display: flex;
  gap: 20px;
}

.site-footer__legal a {
  font-size: 13px;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.25s;
}

.site-footer__legal a:hover {
  color: var(--color-primary);
}

.site-footer__icp {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
}

/* ============ BACK TO TOP ============ */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: var(--z-top);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-panel);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-data);
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background 0.3s, color 0.3s, box-shadow 0.3s;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--color-primary);
  color: #07101A;
  box-shadow: var(--glow-primary);
}

.back-top__arrow {
  line-height: 1;
}

/* ============ BREADCRUMB ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.25s;
}

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

.breadcrumb__sep {
  color: var(--color-secondary);
}

.breadcrumb__current {
  color: var(--color-text);
}

/* ============ PAGE HERO ============ */
.page-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(181, 55, 242, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  right: 0;
  width: 140px;
  height: 12px;
  background: linear-gradient(135deg, transparent 50%, var(--color-secondary) 50%);
  pointer-events: none;
}

.page-hero__kicker {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.page-hero__title {
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 900;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-hero__title strong {
  color: var(--color-primary);
  font-weight: 900;
}

.page-hero__desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 600px;
}

/* ============ FRAME & PANEL ============ */
.hero-frame {
  position: relative;
  border: 2px solid var(--color-border);
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.03) 0%, rgba(181, 55, 242, 0.08) 100%);
  padding: 32px;
  margin-bottom: 24px;
}

.hero-frame::before,
.hero-frame::after {
  content: '';
  position: absolute;
  width: 32px;
  height: 32px;
  pointer-events: none;
}

.hero-frame::before {
  top: -2px;
  left: -2px;
  border-top: 3px solid var(--color-primary);
  border-left: 3px solid var(--color-primary);
}

.hero-frame::after {
  bottom: -2px;
  right: -2px;
  border-bottom: 3px solid var(--color-primary);
  border-right: 3px solid var(--color-primary);
}

.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  padding: 24px;
  margin-bottom: 24px;
}

.panel--glow {
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.07);
}

/* ============ TAGS ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  background: transparent;
}

.tag--blue {
  border-color: rgba(0, 240, 255, 0.5);
  color: var(--color-primary);
  background: rgba(0, 240, 255, 0.06);
}

.tag--purple {
  border-color: rgba(181, 55, 242, 0.5);
  color: var(--color-secondary);
  background: rgba(181, 55, 242, 0.06);
}

.tag--yellow {
  border-color: rgba(255, 215, 0, 0.5);
  color: var(--color-accent);
  background: rgba(255, 215, 0, 0.05);
}

/* ============ DATA CARD ============ */
.data-card {
  position: relative;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  padding: 24px;
  margin-bottom: 24px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.data-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 0;
  height: 0;
  border-top: 3px solid var(--color-primary);
  border-left: 3px solid var(--color-primary);
  transition: opacity 0.3s;
  opacity: 0;
  pointer-events: none;
}

.data-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.data-card__label {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.data-card__value {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
}

.data-card__value--blue { color: var(--color-primary); }
.data-card__value--purple { color: var(--color-secondary); }
.data-card__value--yellow { color: var(--color-accent); }

/* ============ STAT BLOCK ============ */
.stat-block {
  background: var(--color-panel);
  border-left: 3px solid var(--color-primary);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.stat-block__value {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.stat-block__label {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* ============ ARCHIVE FRAME ============ */
.archive-frame {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
  position: relative;
}

.archive-frame::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 24px;
  width: 72px;
  height: 6px;
  background: var(--color-secondary);
  border-radius: 0 0 3px 3px;
}

.archive-frame__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(0, 240, 255, 0.04);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.archive-frame__body {
  padding: 24px;
}

/* ============ CHAPTER INDEX ============ */
.chapter-index {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.chapter-index__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
}

.chapter-index__title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0;
}

.chapter-index__count {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-muted);
}

.chapter-index__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.chapter-index__item + .chapter-index__item {
  border-top: 1px solid var(--color-border);
}

.chapter-index__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  text-decoration: none;
  color: var(--color-muted);
  font-size: 14px;
  transition: background 0.25s, color 0.25s, padding-left 0.25s;
}

.chapter-index__link:hover,
.chapter-index__link[data-active] {
  background: rgba(0, 240, 255, 0.05);
  color: var(--color-primary);
  padding-left: 26px;
}

.chapter-index__num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-secondary);
  min-width: 22px;
}

/* ============ SECTION LABEL ============ */
.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 24px;
}

.section-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-secondary);
  flex-shrink: 0;
}

/* ============ IMAGE FRAME ============ */
.img-frame {
  position: relative;
  background:
    linear-gradient(rgba(0, 240, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px),
    var(--color-panel);
  background-size: 16px 16px, 16px 16px, cover;
  border: 1px solid var(--color-border);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.img-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary) 0%, transparent 55%);
  opacity: 0.25;
  pointer-events: none;
}

.img-frame--hero {
  aspect-ratio: 16 / 9;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

/* ============ ANIMATIONS ============ */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--2-1,
  .grid--1-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .status-bar__inner {
    padding: 0 16px;
  }

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

  .header-main {
    padding: 0 16px;
    height: 60px;
  }

  .header-brand__title {
    font-size: 16px;
  }

  .header-brand__mark {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }

  .header-live__text {
    display: none;
  }

  .header-live {
    padding: 6px 10px;
  }

  .nav-toggle {
    padding: 8px 12px;
  }

  .nav-toggle__text {
    display: none;
  }

  .slide-nav {
    width: 340px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 32px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 8px;
    padding: 0 16px;
  }

  .site-footer__legal {
    gap: 12px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }

  .hero-frame {
    padding: 24px;
  }

  .page-hero {
    padding: 32px 0 24px;
  }
}

@media (max-width: 480px) {
  .status-bar__region {
    font-size: 11px;
  }

  .header-brand {
    gap: 8px;
  }

  .header-brand__title {
    font-size: 14px;
  }

  .slide-nav__link {
    padding: 14px 20px;
  }

  .slide-nav__link:hover,
  .slide-nav__link[aria-current="page"] {
    padding-left: 26px;
  }

  .slide-nav__link::after {
    left: 20px;
  }

  .slide-nav__link:hover::after,
  .slide-nav__link[aria-current="page"]::after {
    right: 20px;
  }
}

/* ============ MOTION REDUCTION ============ */
@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;
  }

  .status-bar__dot,
  .header-live__dot,
  .slide-nav__dot {
    animation: none !important;
  }
}