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

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

body {
  font-family: 'Noto Sans SC', Inter, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: #E8EEF7;
  background: #0A1F3C;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: #E8EEF7;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

:root {
  --bg-primary: #0A1F3C;
  --bg-alt: #142E52;
  --bg-deep: #07152A;
  --neon: #39FF14;
  --orange: #FF6B35;
  --silver: #A8B2C6;
  --text: #E8EEF7;
  --text-muted: #8CA0B8;
  --grad-brand: linear-gradient(135deg, #0A1F3C 0%, #1B3A6B 100%);
  --font-heading: 'Archivo Black', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', Inter, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'SF Mono', Consolas, 'Courier New', monospace;
  --size-display: clamp(2.5rem, 8vw, 5rem);
  --size-h2: clamp(1.8rem, 4vw, 2.5rem);
  --size-h3: clamp(1.2rem, 2.5vw, 1.6rem);
  --size-body: 1rem;
  --size-caption: 0.875rem;
  --header-h: 76px;
  --radius: 4px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-neon: 0 0 20px rgba(57, 255, 20, 0.35);
  --container-w: 1440px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.25s var(--ease);
}

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

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

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 1100;
  padding: 10px 20px;
  background: var(--neon);
  color: var(--bg-primary);
  font-weight: 700;
  border-radius: var(--radius);
  transition: top 0.3s var(--ease);
}

.skip-link:focus-visible {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(10, 31, 60, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(168, 178, 198, 0.15);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 4px;
  background: linear-gradient(90deg, var(--neon) 0%, transparent 50%, var(--orange) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 100%);
  opacity: 0.8;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

.site-header__progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--neon);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.7);
  z-index: 1002;
  pointer-events: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--neon) 0%, #0e9e00 100%);
  clip-path: polygon(20% 0%, 100% 0%, 80% 100%, 0% 100%);
  box-shadow: var(--shadow-neon);
}

.brand__dot {
  width: 10px;
  height: 10px;
  background: var(--bg-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(7, 21, 42, 0.5);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text);
  transform: skewX(-8deg);
  letter-spacing: 0.02em;
}

.brand__tag {
  font-family: var(--font-data);
  font-size: 0.55rem;
  color: var(--neon);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.brand--footer {
  margin-bottom: 16px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

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

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.site-nav__link:hover::after {
  transform: scaleX(1);
}

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

.site-nav__link[aria-current='page']::after {
  transform: scaleX(1);
  background: var(--neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

.site-nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 1003;
  background: rgba(7, 21, 42, 0.65);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}

.site-nav__overlay[data-open='true'] {
  opacity: 1;
  visibility: visible;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
  transition: all var(--transition);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn--neon {
  background: var(--neon);
  color: var(--bg-primary);
  border-color: var(--neon);
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.25);
}

.btn--neon:hover {
  background: transparent;
  color: var(--neon);
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.45);
}

.btn--register {
  background: var(--neon);
  color: var(--bg-primary);
  border-color: var(--neon);
  font-weight: 800;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn--register:hover {
  background: transparent;
  color: var(--neon);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 1005;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 2px solid rgba(168, 178, 198, 0.4);
  border-radius: var(--radius);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: rgba(20, 46, 82, 0.5);
  transition: border-color var(--transition);
}

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

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

.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-footer {
  background: var(--bg-deep);
  padding-top: clamp(48px, 6vw, 80px);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--neon) 0%, transparent 40%, var(--orange) 100%);
  clip-path: polygon(0 0, 25% 0, 100% 100%, 0 100%);
  opacity: 0.9;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.site-footer__desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 16px 0 24px;
  max-width: 34em;
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding-left: 16px;
  position: relative;
}

.site-footer__heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  background: var(--neon);
  transform: translateY(-50%) rotate(45deg);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__list li {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.site-footer__link {
  color: var(--text-muted);
  transition: color var(--transition), padding-left var(--transition);
}

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

.site-footer__contact-list li {
  display: flex;
  gap: 12px;
}

.footer-contact-label {
  color: var(--silver);
  flex-shrink: 0;
  min-width: 4.5em;
  font-size: 0.9rem;
}

.footer-contact-value {
  color: var(--text-muted);
  font-size: 0.9rem;
  word-break: break-all;
}

.site-footer__bottom {
  border-top: 1px solid rgba(168, 178, 198, 0.1);
  padding-block: 20px;
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.site-footer__legal {
  display: flex;
  gap: 24px;
}

.section {
  position: relative;
  padding-block: clamp(64px, 10vw, 120px);
}

.section__header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.section__num {
  font-family: var(--font-data);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 2px var(--neon);
  line-height: 1;
  flex-shrink: 0;
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--size-h2);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.section__desc {
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 48em;
}

.card {
  background: var(--bg-alt);
  border: 2px solid rgba(168, 178, 198, 0.15);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--neon);
  box-shadow: var(--shadow);
}

.card--elev {
  box-shadow: var(--shadow);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--neon);
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: 2px;
  letter-spacing: 0.04em;
}

.data-text {
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--neon);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}

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

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

.breadcrumb [aria-current='page'] {
  color: var(--text);
}

.page-hero {
  position: relative;
  padding-block: clamp(60px, 10vw, 120px);
  background: var(--grad-brand);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -10%;
  width: 60%;
  height: 160%;
  background: rgba(168, 178, 198, 0.03);
  transform: rotate(15deg);
  border-left: 3px solid rgba(57, 255, 20, 0.3);
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 40%;
  height: 100%;
  background: rgba(255, 107, 53, 0.05);
  transform: rotate(-10deg);
  border-right: 2px solid rgba(255, 107, 53, 0.25);
}

.page-hero > * {
  position: relative;
  z-index: 1;
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: var(--size-display);
  line-height: 1.1;
  color: var(--text);
  max-width: 16em;
}

.page-hero__desc {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 36em;
  margin-top: 16px;
}

.page-hero__meta {
  font-family: var(--font-data);
  color: var(--neon);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  margin-top: 20px;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--bg-alt);
  border-radius: var(--radius);
}

.img-frame img,
.img-frame picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

.img-frame--skew {
  clip-path: polygon(0 0, 100% 4%, 100% 96%, 0 100%);
}

.img-frame--placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20, 46, 82, 0.7), rgba(10, 31, 60, 0.9));
  z-index: 1;
}

.img-frame--placeholder::after {
  content: 'DATA_IMG';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--silver);
  letter-spacing: 0.3em;
  z-index: 2;
}

.divider {
  height: 3px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--orange) 60%, transparent 100%);
  border: none;
}

.pagination {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pagination__link,
.pagination__current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  border: 2px solid rgba(168, 178, 198, 0.2);
  color: var(--text-muted);
  font-family: var(--font-data);
  transition: all var(--transition);
}

.pagination__link:hover {
  border-color: var(--neon);
  color: var(--neon);
}

.pagination__current {
  background: var(--neon);
  color: var(--bg-primary);
  border-color: var(--neon);
  font-weight: 700;
}

[data-reveal].is-reveal-ready {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

[data-reveal][data-reveal-delay='100'].is-reveal-ready {
  transition-delay: 0.1s;
}

[data-reveal][data-reveal-delay='200'].is-reveal-ready {
  transition-delay: 0.2s;
}

[data-reveal][data-reveal-delay='300'].is-reveal-ready {
  transition-delay: 0.3s;
}

@media (max-width: 991px) {
  :root {
    --header-h: 64px;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;
    width: min(340px, 85vw);
    background: var(--bg-alt);
    border-left: 1px solid rgba(168, 178, 198, 0.15);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 28px;
    padding: calc(var(--header-h) + 24px) 32px 32px;
    transform: translateX(100%);
    transition: transform 0.3s var(--ease);
    z-index: 1004;
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.45);
    overflow-y: auto;
  }

  .site-nav[data-open='true'] {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    width: 100%;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: 12px 8px;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(168, 178, 198, 0.08);
  }

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

  .site-nav__link[aria-current='page'] {
    background: rgba(57, 255, 20, 0.08);
    border-left: 3px solid var(--neon);
    padding-left: 12px;
  }

  .btn--register {
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: flex;
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }

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

@media (max-width: 767px) {
  :root {
    --header-h: 58px;
  }

  .brand__mark {
    width: 32px;
    height: 32px;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__tag {
    font-size: 0.5rem;
    letter-spacing: 0.2em;
  }

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

  .site-footer__brand {
    grid-column: auto;
  }

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

  .site-footer__legal {
    gap: 16px;
  }

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

  .section__header {
    flex-direction: column;
    gap: 8px;
  }
}

@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-nav {
    transition: none;
  }

  .skip-link {
    transition: none;
  }

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