:root {
  --font-headline: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: "Roboto Mono", "SFMono-Regular", Menlo, monospace;

  --c-space: #0A1E3F;
  --c-space-deep: #071630;
  --c-space-variant: #132B5C;
  --c-neon: #39FF88;
  --c-orange: #FF8A00;
  --c-cream: #F7F5F0;
  --c-ink: #1A1A1A;
  --c-gray: #4A5568;
  --c-border: #D1D5DB;
  --c-yellow: #FFD600;
  --c-overlay: rgba(10, 30, 63, 0.8);

  --max-w: 1200px;
  --gutter: clamp(20px, 4vw, 48px);
  --gutter-x2: clamp(40px, 8vw, 96px);
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
  background-color: var(--c-cream);
  background-image:
    linear-gradient(rgba(10, 30, 63, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 30, 63, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
}

main,
.main-content,
#main-content {
  flex: 1 0 auto;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.18;
  color: var(--c-space);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.35rem;
}

p,
ul,
ol,
dl {
  margin: 0;
}

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

a {
  color: var(--c-space);
  text-underline-offset: 0.22em;
  text-decoration-color: rgba(10, 30, 63, 0.3);
}

a:hover {
  color: var(--c-orange);
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--c-neon);
  color: var(--c-space);
}

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

:target {
  scroll-margin-top: 100px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.container {
  width: min(calc(100% - var(--gutter-x2)), var(--max-w));
  margin-inline: auto;
}

.section {
  padding: clamp(2.8rem, 7vw, 5.5rem) 0;
}

.section__head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1.4rem;
  row-gap: 0.35rem;
  align-items: end;
  margin-bottom: clamp(1.8rem, 5vw, 3rem);
}

.section__index {
  grid-row: span 2;
  font-family: var(--font-number);
  font-size: clamp(3.4rem, 8vw, 5.6rem);
  font-weight: 700;
  line-height: 0.85;
  color: var(--c-orange);
  letter-spacing: -0.05em;
}

.section__label {
  align-self: end;
  justify-self: start;
  display: inline-block;
  padding: 0.15em 0.8em 0.12em;
  font-family: var(--font-number);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-gray);
  text-transform: uppercase;
  background: rgba(255, 138, 0, 0.12);
}

.section__title {
  grid-column: 2;
  margin: 0;
  max-width: 18em;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  color: var(--c-space);
}

.section__title::after {
  content: "";
  display: block;
  width: 2.4rem;
  height: 4px;
  margin-top: 0.8rem;
  background: linear-gradient(90deg, var(--c-neon), var(--c-orange));
}

.section__intro {
  max-width: 46em;
  margin: -1.5rem 0 2.5rem;
  padding-left: 1.2rem;
  border-left: 3px solid var(--c-neon);
  color: var(--c-gray);
  font-size: 1.05rem;
  line-height: 1.9;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5em;
  padding: 1.4rem 0 0.8rem;
  margin: 0 0 2rem;
  font-size: 0.88rem;
  color: var(--c-gray);
  border-bottom: 1px solid var(--c-border);
}

.breadcrumb::before {
  content: "//";
  font-family: var(--font-number);
  font-weight: 700;
  color: var(--c-orange);
}

.breadcrumb__link {
  color: var(--c-gray);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--c-orange);
}

.breadcrumb__sep {
  margin: 0 0.2em;
  color: var(--c-orange);
}

.breadcrumb__current {
  color: var(--c-space);
  font-weight: 700;
}

.btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.8em 1.7em;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-space);
  text-decoration: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 0.2s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--c-neon);
  border-radius: 2px;
  transform: skewX(-10deg);
  transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover::before {
  background: var(--c-yellow);
  transform: skewX(-10deg) scale(1.02);
}

.btn:active::before {
  transform: skewX(-10deg) scale(0.97);
}

.btn--ghost {
  color: var(--c-cream);
}

.btn--ghost::before {
  background: transparent;
  box-shadow: inset 0 0 0 2px rgba(247, 245, 240, 0.88);
}

.btn--ghost:hover {
  color: var(--c-space);
}

.btn--ghost:hover::before {
  background: var(--c-neon);
  box-shadow: inset 0 0 0 2px var(--c-neon);
}

.btn--outline {
  color: var(--c-space);
}

.btn--outline::before {
  background: transparent;
  box-shadow: inset 0 0 0 2px var(--c-space);
}

.btn--outline:hover {
  color: var(--c-cream);
}

.btn--outline:hover::before {
  background: var(--c-space);
  box-shadow: inset 0 0 0 2px var(--c-space);
}

.tag {
  display: inline-block;
  padding: 0.22em 0.75em;
  font-family: var(--font-number);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-cream);
  background: var(--c-space-variant);
  text-transform: uppercase;
}

.tag--orange {
  background: var(--c-orange);
  color: var(--c-space);
}

.tag--yellow {
  background: var(--c-yellow);
  color: var(--c-space);
}

.tag--neon {
  background: var(--c-neon);
  color: var(--c-space);
}

.grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  position: relative;
  padding: 1.6rem 1.6rem 1.8rem;
  background: var(--c-cream);
  border: 1px solid var(--c-border);
  box-shadow: 0 2px 0 rgba(10, 30, 63, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(10, 30, 63, 0.1);
}

.card__title {
  font-size: 1.2rem;
  margin-bottom: 0.35em;
}

.card__meta {
  font-family: var(--font-number);
  font-size: 0.82rem;
  color: var(--c-gray);
  letter-spacing: 0.03em;
}

.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--c-space);
  border: 1px solid rgba(10, 30, 63, 0.14);
}

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

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

.media--1x1 {
  aspect-ratio: 1 / 1;
}

.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-number);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: rgba(247, 245, 240, 0.5);
  background:
    linear-gradient(135deg, rgba(57, 255, 136, 0.1) 0%, transparent 45%),
    repeating-linear-gradient(-45deg, rgba(247, 245, 240, 0.05) 0 1px, transparent 1px 14px),
    linear-gradient(150deg, var(--c-space-variant), var(--c-space));
}

.media__placeholder::before {
  content: "";
  width: 32px;
  height: 32px;
  border: 2px solid rgba(247, 245, 240, 0.25);
  border-top-color: var(--c-neon);
  transform: rotate(45deg);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.7rem;
  margin: 0 0 2rem;
}

.filter-btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.5em 1.2em;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--c-space);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 0.2s ease;
}

.filter-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: 2px solid var(--c-space);
  background: transparent;
  border-radius: 2px;
  transform: skewX(-8deg);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.filter-btn:hover::before {
  border-color: var(--c-orange);
}

.filter-btn.is-active {
  color: var(--c-cream);
}

.filter-btn.is-active::before {
  background: var(--c-space);
  border-color: var(--c-space);
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 1000;
  padding: 0.7em 1.3em;
  background: var(--c-neon);
  color: var(--c-space);
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top 0.25s ease;
}

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

.site-header {
  position: relative;
  z-index: 200;
  background-color: var(--c-space);
  color: var(--c-cream);
  border-bottom: 4px solid var(--c-neon);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-neon) 0 40%, var(--c-orange) 40% 70%, var(--c-yellow) 70% 100%);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(-45deg, transparent 0 16px, rgba(57, 255, 136, 0.03) 16px 18px);
}

.site-header__inner {
  position: relative;
  width: min(calc(100% - var(--gutter-x2)), var(--max-w));
  margin-inline: auto;
}

.site-header__topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(247, 245, 240, 0.14);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

.site-header__sub {
  color: rgba(247, 245, 240, 0.72);
}

.site-header__edition {
  font-family: var(--font-number);
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  color: var(--c-neon);
  text-transform: uppercase;
}

.site-header__masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  padding: 1rem 0 0.6rem;
  text-align: center;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  text-decoration: none;
  color: inherit;
}

.site-brand__mark {
  font-family: var(--font-headline);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1;
  color: var(--c-neon);
}

.site-brand__name {
  font-family: var(--font-headline);
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  font-weight: 900;
  line-height: 1;
  color: var(--c-cream);
  letter-spacing: 0.06em;
  margin-left: 0.14em;
}

.site-brand__tagline {
  margin: 0.25rem 0 0;
  font-family: var(--font-number);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.42em;
  color: rgba(247, 245, 240, 0.5);
  text-transform: uppercase;
}

.site-nav {
  border-top: 1px solid rgba(247, 245, 240, 0.14);
  margin-top: 0.35rem;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.85em 1em;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: rgba(247, 245, 240, 0.86);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--c-neon);
  background-color: rgba(57, 255, 136, 0.07);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-neon);
  font-weight: 700;
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 7px;
  height: 7px;
  display: inline-block;
  background: var(--c-neon);
  transform: translateX(-50%) rotate(45deg);
}

.site-nav__num {
  font-family: var(--font-number);
  font-size: 0.68rem;
  color: var(--c-orange);
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45em 0.85em;
  background: transparent;
  border: 1px solid rgba(247, 245, 240, 0.28);
  color: var(--c-cream);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.nav-toggle__box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  background: var(--c-neon);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

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

.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--c-space-deep);
  color: rgba(247, 245, 240, 0.82);
  border-top: 4px solid var(--c-neon);
}

.site-footer::before {
  content: "M6";
  position: absolute;
  right: -0.12em;
  bottom: -0.28em;
  z-index: 0;
  font-family: var(--font-headline);
  font-size: clamp(7rem, 22vw, 16rem);
  line-height: 1;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px rgba(247, 245, 240, 0.05);
  pointer-events: none;
  user-select: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - var(--gutter-x2)), var(--max-w));
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 1.8rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

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

.site-footer__col--about {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__brand {
  display: inline-flex;
  align-items: baseline;
  margin-bottom: 0.8rem;
  text-decoration: none;
}

.site-footer__brand-mark {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--c-neon);
}

.site-footer__brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--c-cream);
  letter-spacing: 0.06em;
  margin-left: 0.12em;
}

.site-footer__about {
  max-width: 30em;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(247, 245, 240, 0.72);
  margin-bottom: 0.55rem;
}

.site-footer__trust {
  font-size: 0.82rem;
  color: var(--c-neon);
  opacity: 0.85;
}

.site-footer__heading {
  display: block;
  font-family: var(--font-number);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-neon);
  text-transform: uppercase;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(247, 245, 240, 0.14);
  margin: 0 0 0.9rem;
}

.site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.45rem;
}

.site-footer__item {
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(247, 245, 240, 0.72);
}

.site-footer__link {
  display: inline-block;
  color: rgba(247, 245, 240, 0.88);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__link:hover {
  color: var(--c-neon);
  padding-left: 4px;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: clamp(2rem, 5vw, 3.2rem);
  padding-top: 1.1rem;
  border-top: 1px solid rgba(247, 245, 240, 0.14);
  font-size: 0.82rem;
  color: rgba(247, 245, 240, 0.5);
}

.site-footer__icp,
.site-footer__copy,
.site-footer__worktime {
  margin: 0;
}

@media (max-width: 900px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 768px) {
  .site-header__topline {
    padding-right: 3.5rem;
  }

  .site-header__edition {
    display: none;
  }

  .site-header__masthead {
    padding: 0.75rem 0;
  }

  .nav-toggle {
    position: absolute;
    top: 0.55rem;
    right: 0;
    display: inline-flex;
  }

  .site-nav {
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: max-height 0.3s ease, opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  .site-nav[data-open] {
    max-height: 420px;
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    border-top: 1px solid rgba(247, 245, 240, 0.12);
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.8em 1.1em;
    border-bottom: 1px solid rgba(247, 245, 240, 0.08);
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(57, 255, 136, 0.08);
  }

  .site-nav__link[aria-current="page"]::after {
    position: static;
    margin-left: auto;
    transform: none;
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

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

@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;
    scroll-behavior: auto !important;
  }
}