:root {
  --font-head: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --color-bg: #0A0A0A;
  --color-panel: #1E1E1E;
  --color-primary: #FF2E6C;
  --color-secondary: #9B4DCA;
  --color-accent: #00F0FF;
  --color-text: #F7DCE0;
  --color-muted: #A0A0A0;
  --glass-bg: rgba(255,255,255,0.06);
  --header-height: 4.75rem;
  --container: 1200px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

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

html {
  scroll-behavior: smooth;
}

html.no-scroll,
body.no-scroll {
  overflow: hidden;
}

body {
  min-height: 100vh;
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(155,77,202,.18), transparent 32%),
    radial-gradient(circle at 85% 0%, rgba(255,46,108,.12), transparent 26%),
    linear-gradient(180deg, #0A0A0A, #0C0710);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-primary);
  color: #0A0A0A;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: .04em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

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

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

.skip-link {
  position: fixed;
  top: -6rem;
  left: 1rem;
  z-index: 300;
  padding: .9rem 1.4rem;
  background: var(--color-primary);
  color: #0A0A0A;
  font-weight: 700;
  border-radius: 2px;
}

.skip-link:focus {
  top: 1rem;
}

#main-content {
  outline: none;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.site-main {
  display: block;
  min-height: 65vh;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin-inline: auto;
}

.section {
  padding-block: clamp(4rem, 9vw, 7rem);
}

.section--tight {
  padding-block: 3rem;
}

.section--panel {
  background: linear-gradient(180deg, var(--color-bg), var(--color-panel));
  border-top: 1px solid rgba(255,255,255,.05);
  border-bottom: 1px solid rgba(255,255,255,.05);
}

.section-index {
  display: block;
  margin-bottom: .75rem;
  font-size: .75rem;
  font-weight: 400;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: .05em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.content-prose {
  max-width: 72ch;
  color: var(--color-muted);
}

.content-prose p + p {
  margin-top: 1.4em;
}

.content-prose a {
  border-bottom: 1px solid currentColor;
}

.page-header {
  padding: calc(var(--header-height) + 2.5rem) 0 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.page-header__index {
  font-size: .75rem;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-header__title {
  margin-top: .35rem;
}

.page-header__description {
  margin-top: .75rem;
  max-width: 42em;
  color: var(--color-muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  height: var(--header-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}

.site-header[data-header="solid"] {
  background: rgba(10,10,10,.86);
  border-bottom-color: rgba(255,46,108,.18);
  box-shadow: 0 8px 30px rgba(0,0,0,.35);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.header__inner {
  position: relative;
  width: min(calc(100% - 2rem), var(--container));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--color-text);
  line-height: 1;
  flex-shrink: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-size: 1.15rem;
  background: transparent;
  box-shadow: 0 0 14px rgba(255,46,108,.25);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background .25s var(--ease), color .25s var(--ease);
}

.brand:hover .brand__mark {
  background: var(--color-primary);
  color: #0A0A0A;
}

.brand__text {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: .14em;
  font-size: 1.35rem;
}

.header__nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: clamp(.6rem, 2vw, 1.75rem);
}

.header__nav-link {
  display: block;
  position: relative;
  padding: .75rem .1rem;
  font-size: .85rem;
  letter-spacing: .16em;
  color: var(--color-muted);
}

.header__nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: .3rem;
  height: 1px;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width .3s var(--ease);
}

.header__nav-link:hover,
.header__nav-link[aria-current="page"] {
  color: var(--color-text);
}

.header__nav-link:hover::before,
.header__nav-link[aria-current="page"]::before {
  width: 100%;
}

.header__toggle {
  display: none;
  position: relative;
  z-index: 130;
  width: 2.75rem;
  height: 2.75rem;
  margin-left: 1rem;
  background: transparent;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 2px;
  place-items: center;
}

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

.header__toggle[aria-expanded="true"] {
  border-color: var(--color-primary);
}

.header__toggle-box {
  position: relative;
  display: block;
  width: 1.25rem;
  height: .75rem;
}

.header__toggle-box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-text);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}

.header__toggle-box span:nth-child(1) {
  top: 0;
}

.header__toggle-box span:nth-child(2) {
  top: calc(50% - .5px);
}

.header__toggle-box span:nth-child(3) {
  top: calc(100% - 1px);
}

.header__toggle[aria-expanded="true"] .header__toggle-box span:nth-child(1) {
  transform: translateY(.375rem) rotate(45deg);
}

.header__toggle[aria-expanded="true"] .header__toggle-box span:nth-child(2) {
  opacity: 0;
}

.header__toggle[aria-expanded="true"] .header__toggle-box span:nth-child(3) {
  transform: translateY(-.375rem) rotate(-45deg);
}

.header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  z-index: 130;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  box-shadow: 0 0 12px rgba(255,46,108,.55);
  pointer-events: none;
}

.site-footer {
  margin-top: auto;
  background: #09060A;
  color: var(--color-muted);
  border-top: 1px solid rgba(155,77,202,.22);
}

.footer__inner {
  width: min(calc(100% - 2rem), var(--container));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 2rem;
  padding: 3rem 0 2.5rem;
}

.footer__identity {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.footer__brand {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: .12em;
  color: var(--color-text);
}

.footer__tagline {
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--color-muted);
}

.footer__statement {
  max-width: 34em;
  margin-top: .25rem;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.footer__col {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.footer__caption {
  margin-bottom: .25rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid rgba(255,46,108,.15);
  font-size: .75rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.footer__links {
  display: grid;
  gap: .6rem;
}

.footer__link {
  font-size: .9rem;
  color: var(--color-muted);
}

.footer__link:hover {
  color: var(--color-accent);
}

.footer__meta {
  margin-top: .25rem;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.footer__bottom {
  padding: 1.1rem 0;
  border-top: 1px solid rgba(255,255,255,.06);
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem 1rem;
}

.footer__copyright,
.footer__icp {
  font-size: .8125rem;
  color: var(--color-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: .9rem 1.75rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--color-text);
  font-size: .9rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-color: rgba(255,255,255,.1);
  color: #0A0A0A;
  font-weight: 700;
}

.btn--primary:hover {
  color: #0A0A0A;
  box-shadow: 0 0 28px rgba(255,46,108,.35);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: rgba(255,46,108,.6);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  background: rgba(255,46,108,.08);
  color: var(--color-text);
}

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

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

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

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

.breadcrumbs {
  margin-bottom: 2rem;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .875rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--color-accent);
}

.breadcrumbs__link {
  color: var(--color-accent);
}

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

.cockpit {
  background: linear-gradient(160deg, var(--color-panel), rgba(10,10,10,.9));
  border: 1px solid rgba(155,77,202,.18);
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.cockpit__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.cockpit__row:last-child {
  border-bottom: 0;
}

.cockpit__label {
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.cockpit__value {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--color-text);
}

.cockpit__value--accent {
  color: var(--color-primary);
  text-shadow: 0 0 16px rgba(255,46,108,.28);
}

.cockpit__value--muted {
  color: var(--color-accent);
  font-weight: 400;
}

.glass-panel {
  background: var(--glass-bg);
  border: 1px solid rgba(255,255,255,.08);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.media-box {
  position: relative;
  overflow: hidden;
  background: var(--glass-bg);
}

.media-box::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media-box--4x5::before {
  padding-top: 125%;
}

.media-box--1x1::before {
  padding-top: 100%;
}

.media-box--2x1::before {
  padding-top: 50%;
}

.media-box > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-box > :not(img) {
  position: relative;
  z-index: 1;
}

@media (max-width: 1100px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .header__toggle {
    display: grid;
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: flex-start;
    padding: 2rem 1.5rem 3rem;
    overflow-y: auto;
    background: rgba(10,10,10,.98);
    visibility: hidden;
    opacity: 0;
    transform: translateX(100%);
    pointer-events: none;
    transition: transform .35s var(--ease), opacity .3s var(--ease), visibility 0s .35s;
  }

  .header__nav[data-open] {
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform .35s var(--ease), opacity .3s var(--ease), visibility 0s;
    box-shadow: -24px 0 40px rgba(0,0,0,.5);
  }

  .header__nav-list {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: .5rem;
  }

  .header__nav-link {
    font-size: 1.5rem;
    padding: .75rem 0;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .cockpit__row {
    grid-template-columns: 1fr;
    gap: .25rem 0;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .header__progress,
  .site-header,
  .header__nav,
  .btn {
    transition: none;
  }
}