:root {
  --color-night: #0A0E27;
  --color-deepblue: #1B1B4B;
  --color-electric: #7C4DFF;
  --color-neon: #00D4FF;
  --color-gold: #FFD700;
  --color-rose: #FF4D8D;
  --color-light: #F5F5FF;
  --color-muted: #B0B0C8;
  --color-dark: #000000;
  --color-panel: rgba(255, 255, 255, 0.05);
  --font-heading: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-index: "Roboto Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  --container-max: 1240px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3.5rem;
  --space-xl: 6rem;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-night);
  color: var(--color-light);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-light);
  line-height: 1.25;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
}

strong {
  color: var(--color-light);
  font-weight: 600;
}

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

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

#main-content {
  display: block;
  scroll-margin-top: 4rem;
}

.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.site-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.site-grid__col--3 { grid-column: span 3; }
.site-grid__col--4 { grid-column: span 4; }
.site-grid__col--6 { grid-column: span 6; }
.site-grid__col--8 { grid-column: span 8; }

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3000;
  background: var(--color-gold);
  color: var(--color-night);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  transform: translateY(-100%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--color-night);
}

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
  z-index: 2000;
  pointer-events: none;
}

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

.site-header {
  background: var(--color-night);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__masthead {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background-image:
    linear-gradient(rgba(124, 77, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 77, 255, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.site-header__masthead-flex {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.site-header__coordinate {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-index);
  font-size: 0.7rem;
  color: var(--color-muted);
  letter-spacing: 0.12em;
  opacity: 0.65;
  pointer-events: none;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  text-decoration: none;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.75rem;
  color: var(--color-light);
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.site-brand__tag {
  font-family: var(--font-index);
  font-size: 0.72rem;
  color: var(--color-gold);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-brand__plus {
  display: inline-block;
  color: var(--color-neon);
  margin-right: 0.15rem;
  font-weight: 700;
}

.site-header__navbar {
  background: var(--color-deepblue);
  position: relative;
}

.site-header__navwrap {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  padding: 0;
  margin: 0.25rem 0.5rem 0.25rem 0;
}

.nav-toggle__line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-light);
  border-radius: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.85rem 1.1rem;
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.site-nav__link:hover {
  color: var(--color-light);
}

.site-nav__link:hover .site-nav__index {
  color: var(--color-neon);
}

.site-nav__index {
  font-family: var(--font-index);
  font-size: 0.68rem;
  color: var(--color-electric);
  transition: color var(--transition);
}

.site-nav__label {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

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

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

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--color-gold);
}

.site-footer {
  background: var(--color-dark);
  color: var(--color-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 3.5rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.45rem;
  color: var(--color-light);
  letter-spacing: 0.05em;
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

.site-footer__tag {
  font-family: var(--font-index);
  font-size: 0.72rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.site-footer__desc {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 32em;
}

.site-footer__trust {
  font-size: 0.75rem;
  color: rgba(176, 176, 200, 0.6);
  border-left: 2px solid var(--color-neon);
  padding-left: 0.75rem;
  margin-top: 1.25rem;
}

.site-footer__title {
  font-family: var(--font-index);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer__links a {
  color: var(--color-muted);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.site-footer__links a:hover {
  color: var(--color-neon);
  padding-left: 0.25rem;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.site-footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.site-footer__label {
  font-family: var(--font-index);
  font-size: 0.68rem;
  color: var(--color-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer__value {
  font-size: 0.88rem;
  color: var(--color-light);
  line-height: 1.5;
}

.site-footer__note {
  font-size: 0.78rem;
  color: rgba(176, 176, 200, 0.7);
  line-height: 1.6;
  margin-top: 1.25rem;
  border-left: 2px solid rgba(255, 215, 0, 0.4);
  padding-left: 0.75rem;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__bottom-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer__copyright {
  font-size: 0.8rem;
  color: rgba(176, 176, 200, 0.7);
  margin: 0;
}

.site-footer__icp {
  font-size: 0.78rem;
  color: rgba(176, 176, 200, 0.55);
  margin: 0;
}

.site-footer__legal {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer__legal a {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-light);
  background: var(--color-panel);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 0;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.15s ease;
}

.site-btn:hover {
  background: rgba(124, 77, 255, 0.16);
  border-color: var(--color-electric);
  color: var(--color-light);
}

.site-btn:active {
  transform: scale(0.97);
}

.site-btn--primary {
  background: var(--color-electric);
  border-color: var(--color-electric);
  color: #fff;
}

.site-btn--primary:hover {
  background: #6A3DD9;
  border-color: #6A3DD9;
  color: #fff;
}

.site-btn--gold {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-night);
  font-weight: 700;
}

.site-btn--gold:hover {
  background: #E6C200;
  border-color: #E6C200;
  color: var(--color-night);
}

.site-btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
}

.site-btn--ghost:hover {
  border-color: var(--color-neon);
  color: var(--color-neon);
  background: rgba(0, 212, 255, 0.08);
}

.site-panel {
  background: var(--color-deepblue);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2rem;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.site-panel--accent {
  border-color: rgba(124, 77, 255, 0.35);
  box-shadow: 0 0 24px rgba(124, 77, 255, 0.07);
}

.site-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-index);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-neon);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.site-kicker::before {
  content: "[";
  color: var(--color-gold);
  font-weight: 700;
}

.site-kicker::after {
  content: "]";
  color: var(--color-gold);
  font-weight: 700;
}

.site-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-index);
  font-size: 0.78rem;
  color: var(--color-muted);
  padding: 0.75rem 0;
}

.site-breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.site-breadcrumb__sep {
  color: rgba(176, 176, 200, 0.35);
}

.site-breadcrumb__current {
  color: var(--color-light);
}

.site-img {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
  background: var(--color-deepblue);
}

.site-img--wide {
  aspect-ratio: 16 / 9;
}

.site-img--square {
  aspect-ratio: 1 / 1;
}

.site-img--portrait {
  aspect-ratio: 4 / 5;
}

.site-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-img__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 100%;
  color: var(--color-muted);
  font-family: var(--font-index);
  font-size: 0.78rem;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255, 255, 255, 0.02) 10px, rgba(255, 255, 255, 0.02) 20px),
    var(--color-deepblue);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1023px) {
  .site-grid__col--3,
  .site-grid__col--4 {
    grid-column: span 6;
  }

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

  .site-footer__col--brand {
    grid-column: span 2;
  }
}

@media (max-width: 767px) {
  .site-container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .site-section {
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }

  .site-grid {
    gap: 1.5rem;
  }

  .site-grid__col--3,
  .site-grid__col--4,
  .site-grid__col--6,
  .site-grid__col--8 {
    grid-column: span 12;
  }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }

  .site-header__masthead-flex {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .site-header__coordinate {
    display: none;
  }

  .site-brand__name {
    font-size: 1.25rem;
  }

  .site-brand__tag {
    font-size: 0.62rem;
  }

  .site-header__navwrap {
    justify-content: flex-end;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-deepblue);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem 0 0.75rem;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .site-nav__link[aria-current="page"]::after {
    left: 1.25rem;
    right: auto;
    bottom: 0.3rem;
    width: 1.5rem;
  }

  .site-header__navbar {
    min-height: 52px;
  }

  .site-footer {
    padding-top: 2.5rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__col--brand {
    grid-column: span 1;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .site-footer__bottom-left {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .site-footer__legal {
    gap: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .site-progress__bar {
    transition: none;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .skip-link {
    transition: none;
  }
}