:root {
  --color-bg: #07101E;
  --color-panel: #0D1826;
  --color-gold: #E8B84B;
  --color-gold-light: #F7D788;
  --color-red: #E5484D;
  --color-cyan: #33D6C0;
  --color-text: #F0F4FA;
  --color-muted: #B4C2D6;
  --color-line: #263952;
  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --container-w: 1440px;
  --side-pad: clamp(16px, 4vw, 48px);
  --header-h: 72px;
  --radius-cut: 10px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --duration: 300ms;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

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

a {
  color: var(--color-gold);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold-light);
}

button {
  font: inherit;
}

::selection {
  background: var(--color-gold);
  color: #07101E;
}

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

:focus:not(:focus-visible) {
  outline: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--color-text);
  font-weight: 700;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 4rem);
}

h2 {
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
}

p {
  margin-bottom: 1em;
}

.container {
  width: min(100% - var(--side-pad) * 2, var(--container-w));
  margin-inline: auto;
}

#main-content {
  flex: 1;
  width: 100%;
  outline: none;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.btn {
  display: inline-block;
  padding: .65em 1.4em;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  text-align: center;
  background-color: var(--color-panel);
  color: var(--color-text);
  border-color: var(--color-line);
  transition: background-color .2s var(--ease), border-color .2s, color .2s, transform .2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--gold {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: #07101E;
}

.btn--gold:hover {
  background-color: var(--color-gold-light);
}

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

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

.btn--red {
  background-color: var(--color-red);
  border-color: var(--color-red);
  color: #FFFFFF;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .85rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-line);
}

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

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

.breadcrumb li[aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

.muted {
  color: var(--color-muted);
}

.data-text {
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  line-height: 1.4;
}

.index {
  font-family: var(--font-mono);
  font-weight: 200;
  line-height: .8;
  font-size: clamp(6rem, 14vw, 12rem);
  letter-spacing: -.06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--color-line);
}

.section-title {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  padding-left: 14px;
  border-left: 4px solid var(--color-gold);
  margin-bottom: 16px;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: .75rem;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  color: var(--color-muted);
  background: rgba(255, 255, 255, .02);
}

.tag--gold {
  color: var(--color-gold);
  border-color: rgba(232, 184, 75, .5);
}

.tag--red {
  color: var(--color-red);
  border-color: rgba(229, 72, 77, .5);
}

.tag--cyan {
  color: var(--color-cyan);
  border-color: rgba(51, 214, 192, .5);
}

.image-placeholder {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 140px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(232, 184, 75, .06), transparent 60%), var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cut);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .85rem;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.image-placeholder::before {
  content: attr(data-label);
  position: absolute;
  right: 14px;
  bottom: 10px;
  font-size: 11px;
  opacity: .4;
  letter-spacing: .08em;
}

.image-placeholder--16x9 {
  aspect-ratio: 16 / 9;
}

.image-placeholder--4x3 {
  aspect-ratio: 4 / 3;
}

.image-placeholder--portrait {
  aspect-ratio: 3 / 4;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 12px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--color-gold);
  color: #07101E;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  transition: top .2s var(--ease);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(7, 16, 30, .92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header__inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--side-pad);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
}

.site-brand:hover {
  color: var(--color-text);
}

.site-brand__mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  color: #07101E;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.02em;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.site-brand__text {
  font-size: 18px;
  letter-spacing: .04em;
}

.site-brand__tag {
  display: inline-block;
  padding: 2px 6px;
  font-size: 10px;
  letter-spacing: .08em;
  line-height: 1;
  color: var(--color-red);
  border: 1px solid currentColor;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-weight: 500;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
  transition: border-color .2s;
}

.nav-toggle:hover {
  border-color: var(--color-gold);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-gold);
  position: relative;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--color-gold);
  transition: transform .2s var(--ease), top .2s var(--ease);
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle__label {
  font-size: .75rem;
  letter-spacing: .05em;
  color: var(--color-muted);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  display: block;
  padding: 8px 14px;
  color: var(--color-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  transition: color .2s, background-color .2s, box-shadow .2s;
}

.site-nav__link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, .04);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  box-shadow: inset 0 -2px 0 var(--color-red);
}

.site-nav__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--color-muted);
}

.site-nav__status {
  color: var(--color-cyan);
  display: inline-flex;
  align-items: center;
}

.site-nav__status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  margin-right: 6px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

.read-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-line);
  pointer-events: none;
}

.read-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-red));
  transition: width .1s linear;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--color-panel);
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  margin-top: auto;
}

.site-footer::before {
  content: "OB";
  position: absolute;
  right: -5vw;
  bottom: -10vw;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: min(35vw, 26rem);
  line-height: .8;
  color: transparent;
  -webkit-text-stroke: 1px rgba(232, 184, 75, .08);
  pointer-events: none;
  user-select: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 56px var(--side-pad) 24px;
  display: grid;
  gap: 40px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1.2fr 1fr 1.5fr;
  gap: 32px;
}

.site-footer__logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: .02em;
}

.site-footer__slogan {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--color-muted);
  margin-top: 8px;
}

.site-footer__entry {
  margin-top: 12px;
}

.site-footer__entry a {
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: .85rem;
  border-bottom: 1px solid rgba(232, 184, 75, .4);
  padding-bottom: 2px;
}

.site-footer__entry a:hover {
  color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}

.site-footer__heading {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--color-gold);
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 600;
}

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

.site-footer__legal ul,
.site-footer__contact ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer a {
  color: var(--color-muted);
  transition: color .2s;
}

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

.site-footer__contact li {
  font-size: .9rem;
}

.site-footer__bottom {
  border-top: 1px solid var(--color-line);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: .8rem;
  color: var(--color-muted);
}

.site-footer__note {
  color: var(--color-muted);
}

@media (max-width: 1024px) {
  .site-nav__meta {
    display: none;
  }
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-brand__tag {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    z-index: 150;
    width: min(300px, 85vw);
    background: rgba(13, 24, 38, .98);
    border-left: 1px solid var(--color-line);
    box-shadow: -12px 0 24px rgba(0, 0, 0, .4);
    padding: 24px;
    display: flex;
    flex-direction: column;
    transform: translateX(102%);
    transition: transform .3s var(--ease);
    overflow-y: auto;
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    margin-top: 12px;
  }

  .site-nav__link {
    font-size: 18px;
    padding: 12px 10px;
    width: 100%;
  }

  .site-nav__link[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--color-gold);
  }

  .site-nav__meta {
    display: flex;
    justify-content: flex-start;
    margin: 24px 0 0;
    padding: 16px 0 0;
    border-left: 0;
    border-top: 1px solid var(--color-line);
    width: 100%;
  }

  .site-footer__inner {
    padding-top: 40px;
  }

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

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

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

  .section-title {
    padding-left: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .read-progress__bar {
    transition: none;
  }
}