:root {
  --color-bg-primary: #0a1628;
  --color-bg-secondary: #101f3c;
  --color-accent-yellow: #f5c518;
  --color-accent-green: #00ff88;
  --color-text-primary: #e8edf4;
  --color-text-secondary: #8b9cb4;
  --color-line: #1e2f4a;
  --color-warning: #ff5c5c;
  --color-success: #00d465;
  --font-heading: "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  --font-data: "Roboto Mono", "Courier New", monospace;
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

body,
h1,
h2,
h3,
h4,
p,
ul,
figure {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

[hidden] {
  display: none !important;
}

::selection {
  background: var(--color-accent-yellow);
  color: #0a1628;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 200;
  background: var(--color-accent-green);
  color: #0a1628;
  font-weight: 700;
  padding: 12px 20px;
}

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

.site-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-yellow), var(--color-accent-green));
  z-index: 10;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.92);
  border-bottom: 2px solid var(--color-line);
}

.site-header__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  min-height: 72px;
  gap: 16px;
}

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

.site-header__brand-mark {
  display: block;
  width: 28px;
  height: 28px;
  background: var(--color-accent-yellow);
  transform: skew(-10deg);
  box-shadow: 4px 4px 0 var(--color-accent-green);
  position: relative;
}

.site-header__brand-mark::after {
  content: "B";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 16px;
  color: #0a1628;
  transform: skew(10deg);
}

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

.site-header__brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: #ffffff;
}

.site-header__brand-sub {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-green);
}

.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: block;
  padding: 24px 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease;
}

.site-nav__link::before {
  content: attr(data-index) " / ";
  font-family: var(--font-data);
  font-size: 10px;
  color: var(--color-accent-green);
  margin-right: 6px;
  opacity: 0.8;
}

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

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

.site-nav__item--mobile-action {
  display: none;
}

.site-header__action {
  flex-shrink: 0;
}

.btn-legacy {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #0a1628;
  background: var(--color-accent-yellow);
  border: 2px solid #0a1628;
  padding: 9px 18px;
  box-shadow: 4px 4px 0 var(--color-accent-green);
  transform: skew(-4deg);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-legacy:hover {
  transform: skew(-4deg) translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-accent-green);
}

.btn-legacy:active {
  transform: skew(-4deg) translate(0, 0);
  box-shadow: 2px 2px 0 var(--color-accent-green);
}

.btn-legacy__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transform: skew(4deg);
}

.btn-legacy__icon {
  font-size: 16px;
  line-height: 1;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 2px solid var(--color-line);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--color-accent-yellow);
}

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

.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);
}

.site-footer {
  background: #061020;
  border-top: 4px solid var(--color-accent-yellow);
  margin-top: clamp(48px, 8vw, 96px);
}

.site-footer__status {
  border-bottom: 1px solid var(--color-line);
  background: #081826;
}

.site-footer__status-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
}

.site-footer__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-green);
  box-shadow: 0 0 8px var(--color-accent-green);
}

.site-footer__status-sep {
  color: var(--color-line);
}

.site-footer__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 56px clamp(16px, 4vw, 48px) 28px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-line);
}

.site-footer__brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 28px;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.site-footer__brand-name::after {
  content: " / BIBO";
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-accent-green);
  letter-spacing: 0.2em;
  margin-left: 8px;
}

.site-footer__brand-slogan {
  margin-top: 8px;
  max-width: 40ch;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.site-footer__trust {
  margin-top: 16px;
  border-left: 2px solid var(--color-accent-yellow);
  padding-left: 12px;
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.site-footer__col {
  min-width: 0;
}

.site-footer__title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-green);
  margin-bottom: 20px;
}

.site-footer__title::before {
  content: "/ ";
}

.site-footer__links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.site-footer__links a {
  font-size: 14px;
  color: var(--color-text-primary);
  padding: 4px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--color-accent-yellow);
  padding-left: 6px;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__contact li {
  display: flex;
  flex-direction: column;
  font-size: 14px;
  color: var(--color-text-primary);
}

.site-footer__contact-label {
  font-family: var(--font-data);
  font-size: 10px;
  color: var(--color-accent-green);
  letter-spacing: 0.15em;
  margin-bottom: 2px;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.site-footer__bottom a {
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.site-footer__disclaimer {
  display: flex;
  gap: 12px;
}

.site-main {
  min-height: 60vh;
}

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
}

.section-block {
  padding: clamp(48px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--color-line);
}

.section-block:last-child {
  border-bottom: 0;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.section-heading__index {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-accent-green);
}

.section-heading__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-heading__line {
  flex: 1;
  min-width: 40px;
  height: 2px;
  background: var(--color-line);
  margin-top: 0.5em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
  padding: 20px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

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

.btn {
  display: inline-block;
  padding: 10px 22px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  border: 2px solid var(--color-line);
  color: var(--color-text-primary);
  background: transparent;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn:hover {
  border-color: var(--color-accent-yellow);
  color: var(--color-accent-yellow);
}

.btn--primary {
  background: var(--color-accent-yellow);
  border-color: var(--color-accent-yellow);
  color: #0a1628;
  box-shadow: 4px 4px 0 var(--color-accent-green);
}

.btn--primary:hover {
  background: #e6b800;
  color: #0a1628;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-accent-green);
}

.btn--ghost {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.btn--ghost:hover {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
}

.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);
}

.data-panel {
  position: relative;
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-line);
  padding: 24px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
}

.data-panel::before {
  content: attr(data-label);
  position: absolute;
  top: -10px;
  left: 12px;
  padding: 0 8px;
  background: var(--color-bg-secondary);
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-accent-green);
  letter-spacing: 0.1em;
}

.mono-label {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-accent-green);
  letter-spacing: 0.1em;
}

.tag {
  display: inline-block;
  padding: 4px 8px;
  font-family: var(--font-data);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border: 1px solid var(--color-line);
  color: var(--color-text-secondary);
}

.tag--live {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
  color: #0a1628;
}

.figure-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-line);
}

.figure-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%) contrast(1.1);
}

.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.08) 0%, transparent 55%);
  pointer-events: none;
}

.figure-frame.is-skew {
  transform: skew(-2deg);
}

.figure-frame__index {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-data);
  font-size: 11px;
  color: #0a1628;
  background: var(--color-accent-green);
  padding: 2px 8px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

[data-filter-trigger] {
  display: inline-block;
  padding: 8px 16px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  color: var(--color-text-primary);
  background: transparent;
  border: 2px solid var(--color-line);
  transition: all 0.2s ease;
}

[data-filter-trigger]:hover {
  border-color: var(--color-accent-yellow);
  color: var(--color-accent-yellow);
}

[data-filter-trigger].is-active {
  background: var(--color-accent-yellow);
  border-color: var(--color-accent-yellow);
  color: #0a1628;
  box-shadow: 3px 3px 0 var(--color-accent-green);
}

[data-filter-trigger]:disabled {
  opacity: 0.35;
  pointer-events: none;
}

@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    background: var(--color-bg-primary);
    border-bottom: 3px solid var(--color-accent-yellow);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
  }

  .site-nav__link {
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-line);
  }

  .site-nav__link[aria-current="page"] {
    border-bottom-color: var(--color-line);
    box-shadow: inset 4px 0 0 var(--color-accent-yellow);
  }

  .site-nav__item--mobile-action {
    display: block;
  }

  .site-nav__item--mobile-action .btn-legacy {
    margin: 16px 20px 8px;
    justify-content: center;
    display: flex;
  }

  .site-header__action {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header__brand-sub {
    display: none;
  }

  .site-header__brand-name {
    font-size: 18px;
  }

  .site-header__brand-mark {
    width: 24px;
    height: 24px;
    box-shadow: 3px 3px 0 var(--color-accent-green);
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

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