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

:root {
  --bg-deep: #0B1220;
  --bg-ink: #111B2E;
  --bg-abyss: #080E1A;
  --text-cold: #E5E9F0;
  --text-fog: #AAB4C5;
  --accent-cyan: #20D6C7;
  --accent-purple: #7B61FF;
  --gold: #D4A72C;
  --gold-light: #E8C260;
  --line: #2A3B54;
  --glass: rgba(255, 255, 255, 0.06);
  --font-heading: 'Playfair Display', 'Noto Serif SC', 'Songti SC', serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --content-max: 1280px;
  --content-pad: clamp(20px, 4vw, 48px);
  --header-h: 72px;
  --header-h-mobile: 60px;
  --radius: 6px;
}

html {
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-cold);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(38rem 22rem at 88% -4%, rgba(123, 97, 255, 0.12), transparent 60%),
    radial-gradient(32rem 18rem at -6% 18%, rgba(32, 214, 199, 0.07), transparent 55%),
    linear-gradient(180deg, #0d1526 0%, var(--bg-deep) 45%, var(--bg-abyss) 100%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

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

ul,
ol {
  padding-left: 1.4em;
}

p {
  margin-bottom: 1em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-cold);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
}

h3 {
  font-size: 1.3rem;
}

h4 {
  font-size: 1.1rem;
}

a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(32, 214, 199, 0.35);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--accent-cyan);
  text-decoration-color: var(--accent-cyan);
}

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

::selection {
  background: rgba(212, 167, 44, 0.35);
  color: var(--text-cold);
}

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

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--content-pad);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-body {
  padding: 24px 0 96px;
}

#main-content {
  flex: 1;
  scroll-margin-top: 96px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2200;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  opacity: 0.9;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 24px;
  z-index: 3000;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  transition: top 0.25s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 16px;
  outline: none;
  color: var(--bg-deep);
}

.announcement {
  position: relative;
  background: rgba(14, 22, 38, 0.85);
  border-bottom: 1px solid rgba(42, 59, 84, 0.5);
}

.announcement::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(212, 167, 44, 0.2) 40%, transparent 100%);
}

.announcement__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
}

.announcement__text {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text-fog);
}

.announcement__text::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px rgba(212, 167, 44, 0.7);
}

.announcement__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--gold);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.announcement__link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.announcement__link:hover {
  color: var(--gold-light);
  text-decoration: none;
}

.announcement__link:hover::after {
  transform: translateX(3px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(11, 18, 32, 0.84);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.is-scrolled .site-header {
  background: rgba(8, 14, 26, 0.95);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-cold);
  transition: opacity 0.2s ease;
}

.brand:hover {
  color: var(--text-cold);
  opacity: 0.88;
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold);
  background: linear-gradient(135deg, rgba(212, 167, 44, 0.16), rgba(212, 167, 44, 0.02));
  border: 1px solid rgba(212, 167, 44, 0.55);
  border-radius: 2px;
  box-shadow: 0 0 24px rgba(212, 167, 44, 0.05), inset 0 0 12px rgba(212, 167, 44, 0.04);
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  white-space: nowrap;
  color: var(--text-cold);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
}

.nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 13px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-fog);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav__link:hover {
  color: var(--text-cold);
  text-decoration: none;
}

.nav__link[aria-current="page"] {
  color: var(--text-cold);
  border-bottom-color: var(--gold);
}

.nav__no {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 11px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.08);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-cold);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease, background-color 0.25s 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);
}

.site-footer {
  position: relative;
  background: #0A101E;
  border-top: 1px solid var(--line);
  padding-top: 56px;
  padding-bottom: 24px;
  margin-top: 96px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 180px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.6fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(42, 59, 84, 0.6);
}

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

.footer__about {
  font-size: 14px;
  color: var(--text-fog);
  max-width: 360px;
}

.footer__trust {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-fog);
  border-left: 2px solid var(--gold);
  padding-left: 12px;
  opacity: 0.85;
}

.footer__heading {
  display: block;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-cold);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer__nav ul,
.footer__links ul {
  list-style: none;
  padding: 0;
}

.footer__nav li,
.footer__links li {
  margin-bottom: 10px;
}

.footer__nav a,
.footer__links a {
  color: var(--text-fog);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer__nav a:hover,
.footer__links a:hover {
  color: var(--accent-cyan);
  text-decoration: none;
}

.footer__contact p {
  font-size: 14px;
  color: var(--text-fog);
  margin-bottom: 8px;
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-fog);
}

.footer__meta a {
  color: var(--text-fog);
  text-decoration: none;
}

.footer__meta a:hover {
  color: var(--accent-cyan);
}

.footer__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-fog);
}

.footer__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(32, 214, 199, 0.6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

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

.btn--primary {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--bg-deep);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--bg-deep);
  text-decoration: none;
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text-cold);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  text-decoration: none;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-cold);
  margin: 0 0 20px;
}

.editorial-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-cyan);
  letter-spacing: 0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-fog);
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 999px;
  line-height: 1.6;
}

.tag--gold {
  color: var(--gold);
  background: rgba(212, 167, 44, 0.08);
  border-color: rgba(212, 167, 44, 0.4);
}

.tag--purple {
  color: #B7A8FF;
  background: rgba(123, 97, 255, 0.1);
  border-color: rgba(123, 97, 255, 0.4);
}

.card-glass {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.card-glass:hover {
  border-color: rgba(32, 214, 199, 0.45);
  background: rgba(255, 255, 255, 0.08);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 8px;
  font-size: 13px;
  color: var(--text-fog);
}

.breadcrumbs a {
  color: var(--text-fog);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover {
  color: var(--accent-cyan);
  text-decoration: none;
}

.breadcrumbs__sep {
  color: var(--line);
}

.breadcrumbs [aria-current="page"] {
  color: var(--text-cold);
}

.content-body {
  max-width: 760px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-cold);
}

.content-body p {
  margin-bottom: 1.2em;
}

.content-body h2 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  margin: 1.6em 0 0.6em;
  line-height: 1.25;
}

.content-body h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin: 1.4em 0 0.5em;
}

.content-body ul,
.content-body ol {
  margin: 0 0 1.2em 1.4em;
}

.content-body li {
  margin-bottom: 0.4em;
}

.media-frame {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(32, 214, 199, 0.05), transparent 40%),
    linear-gradient(315deg, rgba(123, 97, 255, 0.06), transparent 40%),
    var(--bg-ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media-frame::before {
  content: "";
  display: block;
  min-height: 140px;
  aspect-ratio: 16 / 9;
}

.media-frame[data-ratio="4:3"]::before {
  aspect-ratio: 4 / 3;
}

.media-frame[data-ratio="1:1"]::before {
  aspect-ratio: 1 / 1;
}

.media-frame[data-ratio="21:9"]::before {
  aspect-ratio: 21 / 9;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(0deg, rgba(8, 14, 26, 0.9), rgba(8, 14, 26, 0));
  color: var(--text-fog);
  font-size: 12px;
  letter-spacing: 0.04em;
}

html.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

html.js-enabled [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (min-width: 900px) {
  .nav {
    display: block;
  }
}

@media (max-width: 1023px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 899px) {
  .site-header__inner {
    min-height: var(--header-h-mobile);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h-mobile));
    overflow-y: auto;
    background: rgba(10, 16, 30, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  }

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

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
  }

  .nav__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 13px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(42, 59, 84, 0.55);
  }

  .nav__link[aria-current="page"] {
    border-bottom-color: rgba(42, 59, 84, 0.55);
    color: var(--gold);
  }
}

@media (max-width: 599px) {
  .announcement__inner {
    min-height: 32px;
  }

  .announcement__text {
    font-size: 12px;
  }

  .announcement__link {
    font-size: 12px;
  }

  .brand__name {
    font-size: 17px;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

@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;
  }

  html.js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .announcement__link::after,
  .skip-link,
  .nav-toggle__bar {
    transition: none;
  }
}