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

:root {
  --c-bg: #0A1A2B;
  --c-bg-deep: #071221;
  --c-secondary: #0F3B42;
  --c-purple: #2B2A4A;
  --c-wine: #4A1E2B;
  --c-accent-orange: #FF6B35;
  --c-accent-green: #39FF14;
  --c-text: #E8ECF1;
  --c-text-sub: #A3C2D9;
  --c-glass: rgba(255, 255, 255, 0.08);
  --font-head: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --container: 1280px;
  --radius-card: 20px;
  --radius-panel: 24px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

#main-content {
  flex: 1;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: 24px; }

p {
  margin: 0 0 1em;
}

a {
  color: inherit;
}

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

button {
  font: inherit;
  cursor: pointer;
}

input, textarea, select {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 200;
  background: var(--c-accent-green);
  color: var(--c-bg);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 0 0 12px 12px;
  transition: top 0.3s ease;
}

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

:focus-visible {
  outline: 2px solid var(--c-accent-green);
  outline-offset: 3px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 860px;
}

.section {
  padding-block: clamp(56px, 9vw, 108px);
}

.section--tight {
  padding-block: 32px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(163, 194, 217, 0.25);
}

.section-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}

.section-index {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-accent-green);
  margin: 0;
}

.index-label {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-sub);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--c-accent-orange), var(--c-accent-green));
  z-index: 6;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 26, 43, 0.72);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.site-header__inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 18px;
  transition: padding 0.4s ease;
}

.masthead {
  text-align: center;
}

.masthead__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  color: var(--c-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.masthead__brand::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent-green);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.8);
  flex-shrink: 0;
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.masthead__version {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border: 1px solid rgba(57, 255, 20, 0.5);
  border-radius: 30px;
  color: var(--c-accent-green);
}

.masthead__index {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-sub);
  margin: 20px 0 0;
  max-height: 80px;
  overflow: hidden;
  transition: max-height 0.45s ease, opacity 0.25s ease, margin 0.3s ease;
}

.masthead__name {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(48px, 8vw, 88px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  background: linear-gradient(120deg, #ffffff 0%, #E8ECF1 45%, #A3C2D9 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin: 0;
  max-height: 260px;
  overflow: hidden;
  transition: max-height 0.45s ease, opacity 0.25s ease, margin 0.3s ease;
}

.masthead__slogan {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--c-accent-green);
  margin: 8px 0 0;
  max-height: 60px;
  overflow: hidden;
  transition: max-height 0.45s ease, opacity 0.25s ease, margin 0.3s ease;
}

.masthead__slogan::before,
.masthead__slogan::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--c-accent-orange);
  vertical-align: middle;
  margin: 0 10px;
}

.site-nav {
  position: relative;
  margin-top: 24px;
  display: flex;
  justify-content: center;
  transition: margin 0.4s ease;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  border-radius: 40px;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.site-nav__link {
  display: block;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 15px;
  color: var(--c-text-sub);
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 30px;
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}

.site-nav__link:hover {
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.06);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-accent-green);
  font-weight: 700;
}

.site-nav__toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.4);
  border-radius: 30px;
  padding: 6px 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  color: var(--c-accent-green);
  transition: background 0.2s ease;
}

.site-nav__toggle:hover {
  background: rgba(57, 255, 20, 0.2);
}

.site-nav__toggle-bars {
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  display: inline-block;
  transition: background 0.2s ease;
}

.site-nav__toggle-bars::before,
.site-nav__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s ease, top 0.25s ease;
}

.site-nav__toggle-bars::before { top: -5px; }
.site-nav__toggle-bars::after { top: 5px; }

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars {
  background: transparent;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

[data-header][data-scrolled] .site-header__inner {
  padding-top: 10px;
  padding-bottom: 10px;
}

[data-header][data-scrolled] .masthead__index,
[data-header][data-scrolled] .masthead__name,
[data-header][data-scrolled] .masthead__slogan,
[data-header][data-scrolled] .ticker {
  max-height: 0;
  opacity: 0;
  margin: 0;
  overflow: hidden;
  pointer-events: none;
}

[data-header][data-scrolled] .site-nav {
  margin-top: 8px;
}

[data-header][data-scrolled] .site-nav__list {
  background: rgba(255, 255, 255, 0.06);
  padding: 4px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.ticker {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 720px;
  margin: 18px auto 0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 40px;
  padding: 8px 16px;
  overflow: hidden;
  transition: max-height 0.45s ease, opacity 0.25s ease, margin 0.3s ease;
}

.ticker__tag {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--c-accent-orange);
  color: var(--c-bg);
  flex-shrink: 0;
}

.ticker__viewport {
  overflow: hidden;
  flex: 1;
}

.ticker__track {
  display: inline-flex;
  white-space: nowrap;
  padding-left: 16px;
  animation: ticker-loop 18s linear infinite;
  will-change: transform;
}

.ticker__item {
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--c-text-sub);
  margin-right: 56px;
  white-space: nowrap;
}

.ticker__item::before {
  content: "◆ ";
  color: var(--c-accent-green);
}

@keyframes ticker-loop {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.site-footer {
  background: var(--c-bg-deep);
  border-top: 1px solid rgba(57, 255, 20, 0.12);
  margin-top: auto;
  padding: 56px 0 24px;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent-green), var(--c-accent-orange), transparent);
}

.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.site-footer__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 24px;
  margin: 0 0 8px;
}

.site-footer__desc {
  font-size: 14px;
  color: var(--c-text-sub);
  margin: 0;
  max-width: 260px;
}

.site-footer__heading {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent-green);
  margin: 0 0 16px;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.site-footer__list a {
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--c-text-sub);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__list a:hover {
  color: var(--c-text);
  padding-left: 6px;
}

.site-footer__line {
  font-size: 14px;
  color: var(--c-text-sub);
  margin: 0 0 8px;
}

.site-footer__link {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-accent-green);
  text-decoration: none;
  margin-top: 6px;
  transition: color 0.2s ease;
}

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

.site-footer__meta {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--c-text-sub);
}

.site-footer__meta p {
  margin: 0;
}

.back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(10, 26, 43, 0.85);
  border: 1px solid rgba(57, 255, 20, 0.5);
  color: var(--c-accent-green);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 12px;
  padding: 10px 16px;
  border-radius: 40px;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.back-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover {
  background: rgba(57, 255, 20, 0.15);
}

.back-top__icon {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 8px solid currentColor;
  display: inline-block;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 40px;
  padding: 14px 28px;
  cursor: pointer;
  border: 2px solid transparent;
  background: none;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.btn--primary {
  background: var(--c-accent-green);
  color: var(--c-bg);
  box-shadow: 0 4px 24px rgba(57, 255, 20, 0.2);
}

.btn--primary:hover {
  background: #2ed912;
  box-shadow: 0 6px 32px rgba(57, 255, 20, 0.35);
}

.btn--outline {
  border-color: rgba(57, 255, 20, 0.6);
  color: var(--c-accent-green);
}

.btn--outline:hover {
  background: rgba(57, 255, 20, 0.12);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--c-text);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.card {
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.3);
}

.card--purple {
  background: var(--c-purple);
  border-color: rgba(255, 255, 255, 0.08);
}

.card--wine {
  background: var(--c-wine);
  border-color: rgba(255, 255, 255, 0.08);
}

.card__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  margin: 0 0 8px;
}

.card__meta {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent-green);
  margin: 0 0 12px;
}

.panel {
  background: var(--c-secondary);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-panel);
  padding: clamp(24px, 4vw, 48px);
}

.panel--glass {
  background: var(--c-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.panel--purple {
  background: var(--c-purple);
}

.panel--wine {
  background: var(--c-wine);
}

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

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background: var(--c-secondary);
  aspect-ratio: 3 / 2;
}

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

.media-frame--sport {
  aspect-ratio: 16 / 10;
}

.media-frame--chart {
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(rgba(163, 194, 217, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(163, 194, 217, 0.12) 1px, transparent 1px),
    var(--c-purple);
  background-size: 24px 24px;
}

.media-frame--abstract {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-purple) 0%, var(--c-secondary) 60%, var(--c-bg) 100%);
}

.media-frame--abstract::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(57, 255, 20, 0.15), transparent 40%),
              radial-gradient(circle at 80% 70%, rgba(255, 107, 53, 0.2), transparent 50%);
  pointer-events: none;
}

.media-frame .placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 300;
  letter-spacing: 0.2em;
  font-size: 12px;
  text-transform: uppercase;
  color: rgba(232, 236, 241, 0.4);
  text-align: center;
  padding: 16px;
}

.data-plate {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 28px;
  color: var(--c-accent-green);
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.25);
  border-radius: 16px;
  padding: 12px 20px;
  line-height: 1.2;
}

.data-plate small {
  font-weight: 300;
  font-size: 12px;
  color: var(--c-text-sub);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 300;
  color: var(--c-text-sub);
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.breadcrumb li + li::before {
  content: "→";
  color: var(--c-accent-green);
  font-size: 12px;
}

.breadcrumb a {
  color: var(--c-text-sub);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

.prose {
  font-size: 16px;
  color: #C4D0DA;
}

.prose h2 {
  margin-top: 2em;
}

.prose p {
  margin: 1em 0;
}

.prose a {
  color: var(--c-accent-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

.prose li {
  margin: 0.4em 0;
}

@media (max-width: 991px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .site-nav__toggle {
    display: inline-flex;
  }

  .site-nav {
    justify-content: stretch;
  }

  .site-nav__list {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10, 26, 43, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    gap: 4px;
    z-index: 20;
  }

  [data-nav][data-open] .site-nav__list {
    display: flex;
  }

  .site-nav__link {
    padding: 12px 16px;
    font-size: 15px;
    text-align: center;
  }

  .ticker {
    margin-top: 12px;
    padding: 6px 12px;
  }

  .ticker__item {
    margin-right: 32px;
  }
}

@media (max-width: 600px) {
  .site-header__inner {
    padding: 16px 18px 14px;
  }

  .masthead__version {
    display: none;
  }

  .masthead__index {
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  .masthead__slogan {
    font-size: 12px;
  }

  .masthead__slogan::before,
  .masthead__slogan::after {
    width: 14px;
  }

  .site-footer {
    padding: 40px 0 20px;
  }

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

  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

  .back-top {
    bottom: 16px;
    right: 16px;
    padding: 8px 14px;
  }
}

@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;
  }

  .ticker__track {
    animation: none;
  }

  .card:hover {
    transform: none;
  }

  .back-top {
    transition: none;
    transform: none;
  }
}