:root {
  --ink: #05080D;
  --ink-2: #0A1219;
  --steel: #17232C;
  --steel-2: #1E2C36;
  --cyan: #18B6C9;
  --cyan-soft: #9BE8F0;
  --rust: #C25824;
  --lime: #B8FF3F;
  --paper: #E9EFF2;
  --index: #7C8A95;
  --amber: #E7C66A;

  --line: rgba(155, 232, 240, 0.16);
  --line-strong: rgba(24, 182, 201, 0.45);
  --line-rust: rgba(194, 88, 36, 0.5);

  --frame: clamp(14px, 2.2vw, 28px);
  --frame-max: 1680px;

  --shadow-brut: 8px 8px 0 rgba(3, 6, 10, 0.92);
  --shadow-brut-cyan: 8px 8px 0 rgba(24, 182, 201, 0.2);

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);

  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  --font-display: "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --scroll-progress: 0;
}

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

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

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

body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(233, 239, 242, 0.018) 0 1px, transparent 1px 4px),
    radial-gradient(1200px 640px at 82% -12%, rgba(24, 182, 201, 0.16), transparent 62%),
    radial-gradient(760px 520px at -10% 105%, rgba(194, 88, 36, 0.12), transparent 66%);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

#main-content {
  scroll-margin-top: 150px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

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

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

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: var(--frame);
  z-index: 200;
  padding: 12px 22px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-decoration: none;
  border: 2px solid var(--ink);
  transition: top 180ms var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- axis rail ---------- */
.axis-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  width: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-evenly;
  pointer-events: none;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(24, 182, 201, 0.14), transparent 34%, transparent 66%, rgba(194, 88, 36, 0.1));
}

.axis-rail__tick {
  width: 9px;
  height: 1px;
  background: var(--line-strong);
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 8, 13, 0.98), rgba(5, 8, 13, 0.9));
  border-bottom: 2px solid var(--line-strong);
}

.header-inner {
  width: 100%;
  max-width: var(--frame-max);
  margin-inline: auto;
  padding-inline: var(--frame);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 72px;
  padding-block: 12px;
  transition: min-height 200ms var(--ease), padding 200ms var(--ease);
}

.site-header[data-compact] .header-bar {
  min-height: 56px;
  padding-block: 8px;
}

.brand {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  padding-left: 10px;
  border-left: 4px solid var(--rust);
  text-decoration: none;
  line-height: 1;
}

.brand__mark {
  font-family: var(--font-display);
  font-size: clamp(17px, 1.6vw, 23px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
  transition: color 180ms var(--ease);
}

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

.brand__latin {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--cyan);
}

.header-note {
  max-width: 660px;
  padding-left: clamp(12px, 2vw, 22px);
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--index);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 180ms var(--ease), max-width 240ms var(--ease), padding 240ms var(--ease);
}

.site-header[data-compact] .header-note {
  max-width: 0;
  padding-left: 0;
  opacity: 0;
  border-color: transparent;
}

.header-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--cyan-soft);
  background: rgba(24, 182, 201, 0.07);
  border: 1px solid var(--line-strong);
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.chip:hover {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
  transform: translateY(-1px);
}

.chip--bulletin {
  color: var(--amber);
  border-color: rgba(231, 198, 106, 0.42);
  background: rgba(231, 198, 106, 0.08);
}

.chip--bulletin:hover {
  background: var(--amber);
  color: var(--ink);
  border-color: var(--amber);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.nav-toggle:hover {
  background: var(--steel);
  border-color: var(--cyan);
}

.nav-toggle__bar {
  display: block;
  width: 14px;
  height: 2px;
  background: var(--cyan);
}

.nav-toggle__text {
  margin-left: 2px;
}

/* ---------- navigation ---------- */
.nav {
  display: flex;
  position: relative;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav__list {
  display: flex;
  align-items: stretch;
  min-width: 100%;
}

.nav__item {
  display: flex;
}

.nav__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 12px clamp(13px, 1.6vw, 24px);
  border-right: 1px solid var(--line);
  color: var(--index);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease);
}

.nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--rust);
  transition: color 180ms var(--ease);
}

.nav__label {
  font-family: var(--font-display);
  font-weight: 600;
}

.nav__link:hover {
  color: var(--paper);
  background: var(--steel);
  box-shadow: inset 0 -3px 0 var(--rust);
}

.nav__link:hover .nav__index {
  color: var(--cyan);
}

.nav__link[aria-current="page"] {
  color: var(--paper);
  background: var(--steel-2);
  box-shadow: inset 0 -3px 0 var(--cyan);
}

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

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  will-change: transform;
}

/* ---------- generic layout ---------- */
.container {
  width: 100%;
  max-width: var(--frame-max);
  margin-inline: auto;
  padding-inline: var(--frame);
}

.container--narrow {
  max-width: 1040px;
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.grid--split {
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
}

.panel {
  background: var(--steel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-brut);
  padding: clamp(18px, 2.4vw, 30px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--rust);
  background: rgba(194, 88, 36, 0.08);
  border: 1px solid var(--line-rust);
}

.prose {
  max-width: 74ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.prose p + p {
  margin-top: 1.1em;
}

.prose a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.prose a:hover {
  color: var(--paper);
  border-color: var(--rust);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border: 2px solid var(--cyan);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.btn:hover {
  background: var(--cyan);
  color: var(--ink);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 rgba(194, 88, 36, 0.55);
}

.btn--rust {
  border-color: var(--rust);
}

.btn--rust:hover {
  background: var(--rust);
  color: var(--paper);
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--cyan-soft);
}

.btn--ghost:hover {
  background: var(--steel);
  color: var(--paper);
  border-color: var(--cyan);
  box-shadow: none;
}

/* ---------- breadcrumb ---------- */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--index);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--rust);
}

.breadcrumb__link {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.breadcrumb__link:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

/* ---------- numerals ---------- */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.num--live {
  color: var(--lime);
  animation: score-pulse 1.8s ease-in-out infinite;
}

@keyframes score-pulse {
  0%, 100% {
    opacity: 1;
    text-shadow: 0 0 0 rgba(184, 255, 63, 0);
  }
  50% {
    opacity: 0.84;
    text-shadow: 0 0 26px rgba(184, 255, 63, 0.55);
  }
}

/* ---------- media ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--steel);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-brut-cyan);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.06) saturate(0.9);
  transition: transform 320ms var(--ease), filter 320ms var(--ease);
}

.media:hover img {
  transform: scale(1.03);
  filter: grayscale(0) contrast(1.1) saturate(1);
}

.media--wide {
  aspect-ratio: 16 / 9;
}

.media--tall {
  aspect-ratio: 3 / 4;
}

.media--square {
  aspect-ratio: 1 / 1;
}

.media__placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 120px;
  background:
    repeating-linear-gradient(135deg, rgba(24, 182, 201, 0.14) 0 12px, rgba(23, 35, 44, 0.94) 12px 24px);
  color: var(--index);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(5, 8, 13, 0), rgba(5, 8, 13, 0.92));
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding-inline: var(--frame);
  background: linear-gradient(180deg, rgba(23, 35, 44, 0.92), var(--ink) 42%);
  border-top: 2px solid var(--line-strong);
}

.footer-inner {
  width: 100%;
  max-width: var(--frame-max);
  margin-inline: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(230px, 1.5fr) repeat(3, minmax(140px, 0.8fr)) minmax(230px, 1.25fr);
  gap: clamp(20px, 3vw, 44px);
  padding-block: clamp(32px, 4vw, 56px) clamp(24px, 3vw, 40px);
  border-bottom: 1px solid var(--line);
}

.footer-brand__mark {
  display: inline-block;
  padding-left: 10px;
  border-left: 4px solid var(--cyan);
  font-family: var(--font-display);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--paper);
  transition: color 180ms var(--ease);
}

.footer-brand__mark:hover {
  color: var(--cyan-soft);
}

.footer-brand__line {
  margin-top: 16px;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cyan-soft);
}

.footer-brand__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--index);
}

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--rust);
}

.footer-col__list {
  display: grid;
  gap: 2px;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  color: var(--cyan-soft);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 170ms var(--ease), border-color 170ms var(--ease), transform 170ms var(--ease);
}

.footer-link:hover {
  color: var(--paper);
  border-color: var(--rust);
  transform: translateX(3px);
}

.footer-contact__list {
  display: grid;
  gap: 12px;
}

.footer-contact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--index);
}

.footer-contact__value {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  word-break: break-all;
}

.footer-contact__note {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--index);
}

/* ---------- footer drawer ---------- */
.drawer {
  border-bottom: 1px solid var(--line);
}

.drawer__toggle {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 0;
  text-align: left;
  cursor: pointer;
  transition: color 170ms var(--ease);
}

.drawer__toggle-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.drawer__toggle-hint {
  font-size: 12px;
  color: var(--index);
}

.drawer__toggle::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  transition: color 170ms var(--ease);
}

.drawer__toggle[aria-expanded="true"]::after {
  content: "\2212";
  color: var(--lime);
}

.drawer__toggle:hover .drawer__toggle-label {
  color: var(--paper);
}

.drawer__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 240ms var(--ease);
}

.drawer[data-open] .drawer__panel {
  grid-template-rows: 1fr;
}

.drawer__inner {
  overflow: hidden;
  min-height: 0;
}

.drawer__body {
  padding-bottom: 26px;
}

.drawer__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.drawer__item {
  padding: 12px 0 12px 14px;
  border-left: 2px solid var(--line-strong);
}

.drawer__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.drawer__tag {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--rust);
}

.drawer__text {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-soft);
}

.drawer__more {
  display: inline-block;
  margin-top: 20px;
  padding-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 2px solid var(--rust);
  transition: color 170ms var(--ease), border-color 170ms var(--ease);
}

.drawer__more:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- footer base ---------- */
.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-block: 20px 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--index);
}

.footer-base__icp {
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer-legal .footer-link {
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 0 0 2px;
}

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .axis-rail {
    display: none;
  }
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }

  .grid--split {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .header-bar {
    flex-wrap: wrap;
    gap: 10px 14px;
    min-height: 0;
    padding-block: 12px;
  }

  .header-note {
    display: none;
  }

  .brand {
    order: 1;
  }

  .nav-toggle {
    order: 2;
    display: inline-flex;
    margin-left: auto;
  }

  .header-actions {
    order: 3;
    flex: 1 1 100%;
    margin-left: 0;
    gap: 6px;
  }

  .chip {
    flex: 1 1 auto;
    justify-content: center;
    padding: 6px 10px;
    font-size: 10px;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    background: var(--ink-2);
    border-top: 2px solid var(--cyan);
    border-bottom: 2px solid var(--line-strong);
    box-shadow: 0 28px 52px rgba(0, 0, 0, 0.62);
    overflow: visible;
  }

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

  .nav__list {
    flex-direction: column;
    min-width: 0;
  }

  .nav__link {
    padding: 15px var(--frame);
    border-right: 0;
    border-bottom: 1px solid var(--line);
    font-size: 13px;
  }

  .nav__link:hover,
  .nav__link[aria-current="page"] {
    box-shadow: inset 4px 0 0 var(--cyan);
  }

  .nav__link:hover {
    box-shadow: inset 4px 0 0 var(--rust);
  }

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

  .footer-base__icp {
    padding-left: 0;
    border-left: 0;
  }

  .footer-legal {
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
  }

  .drawer__toggle {
    flex-wrap: wrap;
    gap: 6px 12px;
  }

  .drawer__toggle-hint {
    flex: 1 1 100%;
    order: 3;
  }

  .drawer__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel {
    box-shadow: 5px 5px 0 rgba(3, 6, 10, 0.92);
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .num--live {
    animation: none;
    text-shadow: none;
  }

  .header-progress {
    transition: none;
  }
}