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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

:root {
  --color-primary: #E4002B;
  --color-ink: #1A1A1A;
  --color-paper: #F5F0E8;
  --color-silver: #C0C0C0;
  --color-neon: #39FF14;
  --color-charcoal: #2B2B2B;
  --color-white: #FFFFFF;
  --color-gray: #E0E0E0;
  --color-deep-red: #C0001E;
  --color-amber: #FFB300;

  --font-title: Impact, 'Arial Black', 'Noto Sans SC', sans-serif;
  --font-body: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SF Mono', 'Consolas', 'Courier New', monospace;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --sidebar-width: 288px;
  --sidebar-width-tablet: 240px;
  --header-height-mobile: 64px;

  --container-max: 1080px;
  --container-narrow: 720px;

  --transition-fast: 0.2s ease;
  --transition-med: 0.35s ease;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-charcoal);
  background-color: var(--color-paper);
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

h1 {
  font-size: clamp(2.125rem, 4vw, 3.25rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h3 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
}

p {
  line-height: 1.75;
}

ul,
ol {
  list-style: none;
}

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

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 3px;
  border-radius: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  padding: 0;
  margin: -1px;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  display: inline-block;
  padding: 0.625rem 1.25rem;
  background-color: var(--color-neon);
  color: var(--color-ink);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 0 0 var(--radius-pill) var(--radius-pill);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: top var(--transition-med);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 500;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-neon));
  transition: width 0.1s linear;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  background-color: var(--color-ink);
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--color-paper);
  z-index: 300;
  border-right: 1px solid rgba(192, 192, 192, 0.12);
  overflow: visible;
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 64px;
  height: 1px;
  background: linear-gradient(90deg, rgba(228, 0, 43, 0.35), rgba(57, 255, 20, 0.35), transparent 75%);
  pointer-events: none;
}

.brand {
  position: relative;
  padding: 2.25rem 1.5rem 1.25rem;
  border-bottom: 1px solid rgba(192, 192, 192, 0.12);
}

.brand::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary) 62%, var(--color-neon) 62%, var(--color-neon) 100%);
}

.brand__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-paper);
  text-decoration: none;
}

.brand__link:hover .brand__name {
  color: var(--color-white);
}

.brand__mark {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-title);
  font-size: 1.625rem;
  font-weight: 700;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(228, 0, 43, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand__link:hover .brand__mark {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(228, 0, 43, 0.45);
}

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

.brand__name {
  font-family: var(--font-title);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.2;
  color: var(--color-paper);
  transition: color var(--transition-fast);
}

.brand__tagline {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  color: var(--color-silver);
  letter-spacing: 0.12em;
  margin-top: 2px;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 1rem;
}

.main-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.main-nav__item {
  width: 100%;
}

.main-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.8125rem 1rem;
  border-radius: var(--radius-pill);
  color: rgba(245, 240, 232, 0.72);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.main-nav__link::before {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--color-silver);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.main-nav__link::after {
  content: attr(data-index);
  margin-left: auto;
  padding-left: 0.75rem;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  color: var(--color-silver);
  opacity: 0.45;
  letter-spacing: 0.1em;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.main-nav__link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
}

.main-nav__link:hover::before {
  background: var(--color-neon);
  border-color: var(--color-neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

.main-nav__link:hover::after {
  color: var(--color-neon);
  opacity: 1;
}

.main-nav__link[aria-current="page"] {
  background: linear-gradient(135deg, rgba(228, 0, 43, 0.3), rgba(192, 0, 30, 0.12));
  color: var(--color-white);
}

.main-nav__link[aria-current="page"]::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 8px rgba(228, 0, 43, 0.65);
}

.main-nav__link[aria-current="page"]::after {
  color: var(--color-primary);
  opacity: 0.9;
}

.header-meta {
  position: relative;
  padding: 1.5rem 1.5rem 1.75rem;
  border-top: 1px solid rgba(192, 192, 192, 0.12);
}

.header-meta::before {
  content: '';
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border: 1px solid rgba(228, 0, 43, 0.4);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.header-meta__status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-silver);
  letter-spacing: 0.06em;
}

.header-meta__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-neon);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.65);
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  position: fixed;
  top: 0.625rem;
  right: 1rem;
  z-index: 400;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--color-ink);
  border: 1px solid rgba(192, 192, 192, 0.2);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.nav-toggle__bar {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-paper);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.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);
  background: var(--color-neon);
}

#main-content {
  margin-left: var(--sidebar-width);
  position: relative;
  min-height: 100vh;
}

#main-content::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary) 62%, var(--color-neon) 62%, var(--color-neon) 100%);
}

.page-ctn {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5rem;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-footer {
  position: relative;
  margin-left: var(--sidebar-width);
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-top: 4px solid var(--color-primary);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

.site-footer__top {
  position: relative;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 3rem;
}

.site-footer__logo {
  font-family: var(--font-title);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.site-footer__logo:hover {
  color: var(--color-primary);
}

.site-footer__tagline {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  margin-top: 0.375rem;
}

.site-footer__status {
  font-size: 0.875rem;
  color: rgba(245, 240, 232, 0.55);
  max-width: 280px;
  margin-top: 1.125rem;
  line-height: 1.65;
}

.site-footer__heading {
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-neon);
  margin-bottom: 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid rgba(192, 192, 192, 0.14);
}

.site-footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.site-footer__links a {
  position: relative;
  color: rgba(245, 240, 232, 0.72);
  font-size: 0.9375rem;
  padding-left: 0;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.site-footer__links a::before {
  content: '›';
  position: absolute;
  left: -0.75rem;
  color: var(--color-primary);
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity var(--transition-fast), left var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-neon);
  padding-left: 0.5rem;
}

.site-footer__links a:hover::before {
  opacity: 1;
  left: 0;
}

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

.site-footer__contact-item {
  font-size: 0.875rem;
  color: rgba(245, 240, 232, 0.72);
  line-height: 1.5;
  margin-bottom: 0.5rem;
  font-family: var(--font-data);
  letter-spacing: 0.02em;
}

.site-footer__bottom {
  position: relative;
  border-top: 1px solid rgba(192, 192, 192, 0.1);
  padding: 1.25rem 0;
}

.site-footer__bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: rgba(245, 240, 232, 0.45);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8125rem 1.625rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(228, 0, 43, 0.3);
}

.btn--primary:hover {
  background: var(--color-deep-red);
  box-shadow: 0 6px 20px rgba(192, 0, 30, 0.35);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-silver);
  color: var(--color-ink);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn--ink:hover {
  background: var(--color-charcoal);
  color: var(--color-white);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--color-silver);
  margin-bottom: 2rem;
  letter-spacing: 0.04em;
}

.breadcrumbs a {
  color: var(--color-silver);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs__sep {
  color: var(--color-silver);
  opacity: 0.5;
}

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

.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid rgba(192, 192, 192, 0.35);
  box-shadow: 0 2px 12px rgba(26, 26, 26, 0.05);
  transition: box-shadow var(--transition-med), transform var(--transition-med), border-color var(--transition-med);
}

.card:hover {
  box-shadow: 0 10px 28px rgba(26, 26, 26, 0.1);
  transform: translateY(-3px);
  border-color: rgba(228, 0, 43, 0.35);
}

.img-ctn {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-gray);
  aspect-ratio: 16 / 9;
}

.img-ctn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-med);
}

.img-ctn:hover img {
  transform: scale(1.03);
}

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

.img-ctn--wide {
  aspect-ratio: 21 / 9;
}

.text-data {
  font-family: var(--font-data);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--color-charcoal);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 1023px) and (min-width: 768px) {
  .site-header {
    width: var(--sidebar-width-tablet);
  }

  .brand {
    padding: 2rem 1.25rem 1.125rem;
  }

  .brand__tagline {
    letter-spacing: 0.08em;
  }

  .main-nav {
    padding: 1.25rem 0.75rem;
  }

  .main-nav__link {
    padding: 0.75rem 0.875rem;
    font-size: 0.875rem;
  }

  .main-nav__link::after {
    display: none;
  }

  .header-meta {
    padding: 1.25rem;
  }

  #main-content {
    margin-left: var(--sidebar-width-tablet);
  }

  .site-footer {
    margin-left: var(--sidebar-width-tablet);
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .scroll-progress {
    left: var(--sidebar-width-tablet);
  }
}

@media (max-width: 767px) {
  .skip-link {
    left: 0.75rem;
  }

  .scroll-progress {
    left: 0;
  }

  .site-header {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--header-height-mobile);
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    border-right: none;
    border-bottom: 1px solid rgba(192, 192, 192, 0.15);
    padding-left: 1rem;
    padding-right: 0;
  }

  .site-header::after {
    top: auto;
    bottom: 0;
    height: 1px;
  }

  .brand {
    padding: 0;
    border-bottom: none;
  }

  .brand::before {
    display: none;
  }

  .brand__link {
    gap: 0.5rem;
  }

  .brand__mark {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
    border-radius: 10px;
  }

  .brand__name {
    font-size: 1.125rem;
  }

  .brand__tagline {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height-mobile);
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    background-color: var(--color-ink);
    background-image:
      linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
    background-size: 44px 44px;
    border-left: 1px solid rgba(192, 192, 192, 0.15);
    padding: 2rem 1.25rem;
    transform: translateX(100%);
    transition: transform var(--transition-med);
    box-shadow: none;
    z-index: 350;
  }

  .main-nav[data-open] {
    transform: translateX(0);
    box-shadow: -16px 0 40px rgba(0, 0, 0, 0.45);
  }

  .main-nav__list {
    gap: 6px;
  }

  .main-nav__link {
    font-size: 1rem;
    padding: 0.9375rem 1.125rem;
  }

  .main-nav__link::after {
    display: block;
    opacity: 0.4;
    font-size: 0.75rem;
  }

  .header-meta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  #main-content {
    margin-left: 0;
    padding-top: var(--header-height-mobile);
  }

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

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 3rem 1.5rem 2.5rem;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    gap: 0.4rem;
    text-align: center;
  }

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

  .page-ctn {
    padding: 2.5rem 1.25rem 4rem;
  }
}