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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-ink);
  color: var(--c-rice);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
}

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

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

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

input, select, textarea {
  font: inherit;
}

::selection {
  background: var(--c-primary);
  color: #fff;
}

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

:root {
  --c-primary: #E8352C;
  --c-tech: #1E71FF;
  --c-gold: #F5B942;
  --c-ink: #0B1420;
  --c-slate: #24303E;
  --c-rock: #8A93A6;
  --c-moss: #6E7F5C;
  --c-terra: #C6734F;
  --c-rice: #F4F1EA;
  --font-head: Bahnschrift, 'DIN Alternate', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
  --header-h: 72px;
  --container-w: 1240px;
  --radius: 10px;
  --gap: 24px;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--c-ink);
}

::-webkit-scrollbar-thumb {
  background: var(--c-slate);
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--c-rock);
}

body.nav-lock {
  overflow: hidden;
}

.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.page-main {
  flex: 1;
  padding-top: var(--header-h);
  min-height: 70vh;
}

#main-content {
  outline: none;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.skip-link {
  position: fixed;
  top: -64px;
  left: 16px;
  z-index: 300;
  padding: 12px 24px;
  background: var(--c-primary);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 8px 8px;
  transition: top .24s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  isolation: isolate;
  background: transparent;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-gold), var(--c-tech));
  transform: scaleX(var(--scroll-p, 0));
  transform-origin: 0 0;
  z-index: 3;
  pointer-events: none;
}

.site-header::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(11, 20, 32, 0.94);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(138, 147, 166, 0.14);
  opacity: 0;
  transition: opacity .3s ease;
}

.site-header[data-scrolled="true"]::after {
  opacity: 1;
}

.site-header--solid {
  background: var(--c-ink);
}

.site-header--solid::after {
  opacity: 1;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 100%;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  line-height: 1;
}

.site-header__mark {
  width: 34px;
  height: 26px;
  flex: none;
  background: repeating-linear-gradient(105deg, var(--c-primary) 0 8px, var(--c-tech) 8px 16px, var(--c-gold) 16px 20px);
  clip-path: polygon(22% 0, 100% 0, 78% 100%, 0 100%);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.site-header__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-rice);
  transition: color .2s ease;
}

.site-header__brand:hover .site-header__name {
  color: var(--c-gold);
}

.site-header__tag {
  margin-top: 4px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--c-rock);
}

.site-nav {
  margin-left: auto;
}

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

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px;
  color: var(--c-rice);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  opacity: 0.82;
  transition: opacity .2s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-tech));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .24s ease;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  opacity: 1;
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-header__cta {
  flex: none;
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 6px;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-rice);
  transition: transform .24s ease, opacity .24s ease;
}

.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);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 26px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-rice);
  white-space: nowrap;
  cursor: pointer;
  isolation: isolate;
  transition: color .24s ease;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--c-slate);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 50%, calc(100% - 12px) 100%, 0 100%);
  transition: background-color .24s ease, filter .24s ease;
}

.btn:hover::before {
  filter: brightness(1.18);
}

.btn:active::before {
  transform: translateX(1px);
}

.btn--primary::before {
  background: var(--c-primary);
}

.btn--primary {
  color: #fff;
}

.btn--ghost::before {
  background: transparent;
  box-shadow: inset 0 0 0 1px rgba(138, 147, 166, 0.45);
}

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

.section {
  padding-block: clamp(48px, 8vw, 88px);
}

.section--tight {
  padding-block: clamp(28px, 4vw, 48px);
}

.section__head {
  margin-bottom: clamp(20px, 4vw, 36px);
}

.section__title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--c-rice);
}

.section__sub {
  margin-top: 10px;
  color: var(--c-rock);
  font-size: 15px;
  max-width: 60ch;
}

.title-block {
  position: relative;
  padding-left: 18px;
}

.title-block::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 6px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-tech));
  clip-path: polygon(0 0, 100% 0, 100% 75%, 50% 100%, 0 75%);
}

.content-grid {
  display: grid;
  gap: var(--gap);
}

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

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

.content-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.index-catalog {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
}

.index-catalog__item {
  grid-column: span 4;
  padding: 28px;
  background: rgba(36, 48, 62, 0.45);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.index-catalog__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-primary);
  transform: scaleY(0);
  transform-origin: 0 100%;
  transition: transform .24s ease;
}

.index-catalog__item:hover::before,
.index-catalog__item:focus-within::before {
  transform: scaleY(1);
}

.panel {
  padding: 28px;
  background: var(--c-slate);
  border-radius: var(--radius);
  color: var(--c-rice);
}

.panel--glass {
  background: rgba(36, 48, 62, 0.5);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--c-slate);
  color: var(--c-rock);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.6;
}

.tag--red {
  color: var(--c-primary);
}

.tag--gold {
  color: var(--c-gold);
}

.tag--moss {
  color: var(--c-moss);
}

.data-num {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 500;
  line-height: 1;
  color: var(--c-rice);
}

.data-num--lg {
  font-size: 46px;
}

.data-num--red {
  color: var(--c-primary);
}

.data-num--gold {
  color: var(--c-gold);
}

.data-num--moss {
  color: var(--c-moss);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-tech);
  padding: 8px 0;
  transition: gap .24s ease, color .2s ease;
}

.link-more::after {
  content: '→';
  font-family: var(--font-data);
}

.link-more:hover {
  gap: 12px;
  color: var(--c-primary);
}

.breadcrumb {
  margin-bottom: 24px;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.breadcrumb__item {
  color: var(--c-rock);
}

.breadcrumb__link {
  color: var(--c-rock);
  transition: color .2s ease;
}

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

.breadcrumb__item[aria-current="page"] {
  color: var(--c-rice);
}

.breadcrumb__sep {
  color: var(--c-rock);
  opacity: 0.5;
  font-family: var(--font-data);
  font-size: 12px;
}

.picture-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(115deg, var(--c-slate) 0%, #1B2735 55%, var(--c-slate) 100%);
  aspect-ratio: 16 / 9;
  isolation: isolate;
}

.picture-frame--wide {
  aspect-ratio: 21 / 9;
}

.picture-frame--square {
  aspect-ratio: 1 / 1;
}

.picture-frame--portrait {
  aspect-ratio: 3 / 4;
}

.picture-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(115deg, transparent 30%, rgba(232, 53, 44, 0.14) 46%, rgba(245, 185, 66, 0.1) 52%, transparent 60%);
  background-size: 260% 100%;
  animation: picture-sweep 4s ease-in-out infinite;
  pointer-events: none;
}

.picture-frame::after {
  content: '';
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 26px;
  height: 26px;
  border-right: 3px solid var(--c-primary);
  border-bottom: 3px solid var(--c-primary);
  opacity: 0.8;
  z-index: 1;
  pointer-events: none;
}

@keyframes picture-sweep {
  0% {
    background-position: 240% 0;
  }
  100% {
    background-position: -140% 0;
  }
}

.site-footer {
  position: relative;
  margin-top: auto;
  background: #050B14;
  color: var(--c-rock);
  overflow: hidden;
  border-top: 1px solid rgba(138, 147, 166, 0.12);
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(115deg, transparent 0 48px, rgba(138, 147, 166, 0.025) 48px 49px),
    radial-gradient(ellipse at 85% 0%, rgba(30, 113, 255, 0.07), transparent 55%),
    radial-gradient(ellipse at 10% 100%, rgba(232, 53, 44, 0.05), transparent 40%);
}

.site-footer__inner {
  position: relative;
  padding-top: 56px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px 48px;
  padding-bottom: 40px;
}

.site-footer__brand {
  display: grid;
  align-content: start;
}

.site-footer__logo {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-rice);
  transition: color .2s ease;
}

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

.site-footer__slogan {
  margin-top: 6px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
}

.site-footer__about {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  max-width: 34em;
}

.site-footer__title {
  position: relative;
  margin-bottom: 18px;
  padding: 2px 0 2px 16px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-rice);
}

.site-footer__title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-tech));
  clip-path: polygon(0 0, 100% 0, 100% 70%, 50% 100%, 0 70%);
}

.site-footer__links ul {
  display: grid;
  gap: 6px;
}

.site-footer__links a {
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
  color: var(--c-rock);
  transition: color .2s ease, padding-left .2s ease;
}

.site-footer__links a:hover {
  color: var(--c-rice);
  padding-left: 4px;
}

.site-footer__contact {
  display: grid;
  align-content: start;
}

.site-footer__contact-item {
  display: grid;
  gap: 2px;
  margin-bottom: 14px;
}

.site-footer__contact-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-rock);
}

.site-footer__contact-value {
  font-size: 14px;
  color: var(--c-rice);
  word-break: break-all;
}

.site-footer__note {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(138, 147, 166, 0.65);
  border-left: 2px solid var(--c-terra);
  padding-left: 12px;
}

.site-footer__trust {
  position: relative;
  padding: 18px 20px;
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(138, 147, 166, 0.85);
  background: rgba(36, 48, 62, 0.3);
  border-left: 3px solid var(--c-primary);
}

.site-footer__num {
  font-family: var(--font-data);
  font-size: 18px;
  color: var(--c-gold);
  font-weight: 500;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 28px;
  padding: 18px 0 24px;
  border-top: 1px solid rgba(138, 147, 166, 0.12);
}

.site-footer__copy,
.site-footer__icp {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--c-rock);
}

@media (max-width: 1100px) {
  .site-nav__list {
    gap: 0;
  }
  .site-nav__link {
    padding: 10px 8px;
    font-size: 14px;
  }
  .site-header__cta {
    padding: 0 18px;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 60px;
  }

  .site-header__inner {
    gap: 12px;
  }

  .site-header__cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    width: min(340px, 86vw);
    margin: 0;
    padding: 28px 24px;
    background: rgba(7, 13, 21, 0.98);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: -18px 0 42px rgba(0, 0, 0, 0.45);
    transform: translateX(100%);
    visibility: hidden;
    opacity: 0;
    transition: transform .3s ease, opacity .3s ease, visibility .3s;
    overflow-y: auto;
    z-index: 110;
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
  }

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

  .site-nav__item {
    border-bottom: 1px solid rgba(138, 147, 166, 0.12);
  }

  .site-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    opacity: 0.92;
  }

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

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

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 36px 32px;
  }

  .content-grid--3,
  .content-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .index-catalog__item {
    grid-column: span 6;
  }
}

@media (max-width: 620px) {
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .content-grid--2,
  .content-grid--3,
  .content-grid--4 {
    grid-template-columns: 1fr;
  }

  .index-catalog__item {
    grid-column: span 12;
  }
}

@media (max-width: 400px) {
  .site-header__tag {
    display: none;
  }
}

@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;
  }
}