:root {
  --color-bg: #081B33;
  --color-bg-deep: #040C14;
  --color-paper: #F5ECD9;
  --color-ink: #040C14;
  --color-text: #FFFFFF;
  --color-muted: #A0B6C8;
  --color-border: #2C4C6E;
  --color-accent: #F5E642;
  --color-signal: #3DFF56;
  --color-border-soft: rgba(44, 76, 110, 0.3);
  --color-ink-soft: rgba(4, 12, 20, 0.15);
  --shadow-panel: 0 16px 36px rgba(0, 0, 0, 0.45);
  --font-body: "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
  --font-display: "DIN Alternate", "Helvetica Neue Condensed", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Courier New", "SF Mono", Consolas, monospace;
  --container-max: 1280px;
  --gutter: 24px;
  --gutter-sm: 16px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --z-progress: 2000;
  --z-skip: 3000;
  --z-header: 1100;
  --z-nav: 1090;
  --z-quick-panel: 1080;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

input,
button,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 48px;
}

h2 {
  font-size: 36px;
}

h3 {
  font-size: 28px;
}

p {
  margin-bottom: 1em;
}

::selection {
  background: var(--color-accent);
  color: var(--color-ink);
}

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

@media (max-width: 767px) {
  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 30px;
  }

  h3 {
    font-size: 24px;
  }
}

.l-main {
  display: block;
  min-height: 60vh;
}

.l-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.l-section {
  padding: 72px 0;
}

.l-section--paper {
  background: var(--color-paper);
  color: var(--color-ink);
}

.l-section--paper h1,
.l-section--paper h2,
.l-section--paper h3 {
  color: var(--color-ink);
}

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

.l-grid__span-3 {
  grid-column: span 3;
}

.l-grid__span-4 {
  grid-column: span 4;
}

.l-grid__span-5 {
  grid-column: span 5;
}

.l-grid__span-6 {
  grid-column: span 6;
}

.l-grid__span-7 {
  grid-column: span 7;
}

.l-grid__span-8 {
  grid-column: span 8;
}

.l-grid__span-9 {
  grid-column: span 9;
}

.l-grid__span-12 {
  grid-column: span 12;
}

@media (max-width: 1023px) and (min-width: 768px) {
  .l-grid__span-4,
  .l-grid__span-5,
  .l-grid__span-6,
  .l-grid__span-7,
  .l-grid__span-8,
  .l-grid__span-9 {
    grid-column: span 6;
  }
}

@media (max-width: 767px) {
  .l-grid__span-3,
  .l-grid__span-4,
  .l-grid__span-5,
  .l-grid__span-6,
  .l-grid__span-7,
  .l-grid__span-8,
  .l-grid__span-9,
  .l-grid__span-12 {
    grid-column: span 12;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border: 2px solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-ink);
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-signal);
  border-color: var(--color-signal);
  color: var(--color-ink);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.breadcrumbs {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}

.breadcrumbs__inner {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__link {
  color: var(--color-muted);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  color: var(--color-accent);
}

.breadcrumbs__current {
  color: var(--color-signal);
}

.breadcrumbs__sep {
  opacity: 0.6;
}

.data-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-signal);
  border: 1px solid var(--color-border);
  padding: 2px 10px;
  background: var(--color-border-soft);
}

.cta {
  background: var(--color-accent);
  color: var(--color-ink);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta__title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.2;
}

.cta__text {
  margin: 4px 0 0;
  color: var(--color-ink);
}

.cta__actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

.media-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-border), var(--color-bg-deep));
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  min-height: 200px;
}

.media-frame::after {
  content: "IMG // " attr(data-ratio);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}

.media-frame--free {
  aspect-ratio: auto;
  min-height: 280px;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 16px;
  z-index: var(--z-skip);
  background: var(--color-accent);
  color: var(--color-ink);
  padding: 8px 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top 0.2s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--color-signal);
  z-index: var(--z-progress);
  pointer-events: none;
  transition: width 0.1s ease-out;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-signal) 0%, var(--color-signal) 30%, var(--color-accent) 31%, var(--color-accent) 100%);
}

.site-header__inner {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.site-header__top {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  padding: 8px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  line-height: 1;
}

.brand:hover {
  color: inherit;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-signal);
  letter-spacing: 0.1em;
  border-left: 1px solid var(--color-border);
  padding-left: 10px;
}

.site-header__status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-signal);
  box-shadow: 0 0 8px var(--color-signal);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.35;
  }
}

.quick-search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.quick-search:hover,
.quick-search:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.quick-search__icon {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--color-signal);
  line-height: 1;
}

.quick-search__panel {
  position: absolute;
  top: 100%;
  right: 24px;
  z-index: var(--z-quick-panel);
  width: min(420px, calc(100vw - 48px));
  background: var(--color-paper);
  color: var(--color-ink);
  border: 1px solid var(--color-accent);
  box-shadow: var(--shadow-panel);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  max-height: 80vh;
  overflow-y: auto;
}

.quick-search__panel[data-open] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.quick-search__list {
  padding: 8px;
}

.quick-search__item + .quick-search__item {
  border-top: 1px solid var(--color-ink-soft);
}

.quick-search__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  text-decoration: none;
  color: var(--color-ink);
  transition: background 0.2s ease;
}

.quick-search__link:hover {
  background: var(--color-accent);
  color: var(--color-ink);
}

.quick-search__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-signal);
  background: var(--color-bg-deep);
  padding: 2px 8px;
  flex-shrink: 0;
}

.quick-search__title {
  font-weight: 600;
  font-size: 14px;
  line-height: 1.4;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
}

.nav-toggle__lines {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__line {
  display: block;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.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);
}

.site-nav__list {
  display: flex;
}

.site-nav__item {
  flex: 1 1 0;
  min-width: 0;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-right: 1px solid var(--color-border);
  line-height: 1.2;
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav__item:first-child .site-nav__link {
  border-left: 1px solid var(--color-border);
}

.site-nav__link:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-signal);
  transition: color 0.2s ease;
}

.site-nav__label {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav__link[aria-current="page"] {
  background: var(--color-accent);
  color: var(--color-ink);
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--color-ink);
}

.site-nav__link[aria-current="page"]:hover {
  background: var(--color-accent);
  color: var(--color-ink);
}

@media (max-width: 767px) {
  .site-header__inner {
    padding-left: var(--gutter-sm);
    padding-right: var(--gutter-sm);
  }

  .quick-search__panel {
    right: var(--gutter-sm);
    width: min(420px, calc(100vw - 32px));
  }

  .nav-toggle__text {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-nav);
    background: var(--color-bg);
    padding: 96px var(--gutter) 48px;
    overflow-y: auto;
    transform: translateY(-100%);
    visibility: hidden;
    transition: transform 0.4s ease, visibility 0s linear 0.4s;
    overscroll-behavior: contain;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    visibility: visible;
    transition: transform 0.4s ease;
  }

  .site-nav__list {
    display: block;
    border-top: 1px solid var(--color-border);
  }

  .site-nav__item {
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 4px;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    border-right: 0;
    background: transparent;
  }

  .site-nav__item:first-child .site-nav__link {
    border-left: 0;
  }

  .site-nav__link:hover {
    background: transparent;
    color: var(--color-accent);
  }

  .site-nav__link[aria-current="page"] {
    background: transparent;
    color: var(--color-accent);
  }

  .site-nav__link[aria-current="page"] .site-nav__index {
    color: var(--color-signal);
  }

  .site-nav__index {
    font-size: 12px;
    min-width: 32px;
    text-align: right;
  }

  .site-nav__label {
    white-space: normal;
  }
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

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

  .site-header__status {
    display: none;
  }

  .quick-search__label {
    display: none;
  }

  .quick-search {
    padding: 8px;
  }
}

@media (max-width: 567px) {
  .site-nav__link {
    font-size: 24px;
  }
}

body[data-scroll-lock] {
  overflow: hidden;
}

.site-footer {
  background: var(--color-bg-deep);
  border-top: 4px solid var(--color-border);
  color: var(--color-muted);
  font-size: 14px;
}

.site-footer a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: var(--color-accent);
}

.site-footer__inner {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  padding-top: 56px;
  padding-bottom: 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 4fr 3fr 3fr 4fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.site-footer__brand .brand__name {
  font-size: 28px;
}

.site-footer__brand .brand__tag {
  font-size: 12px;
}

.site-footer__slogan {
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.6;
}

.site-footer__title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.site-footer__list {
  display: grid;
  gap: 8px;
}

.site-footer__text {
  margin-bottom: 4px;
  line-height: 1.6;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
}

@media (max-width: 1023px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .site-footer__inner {
    padding-left: var(--gutter-sm);
    padding-right: var(--gutter-sm);
    padding-top: 40px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }

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