:root {
  color-scheme: dark;
  --bg: #07111d;
  --card: #101e2c;
  --line: #26384a;
  --text: #eaf3fa;
  --muted: #a8b9c7;
  --cyan: #59d9ee;
  --red: #ff676c;
  --gold: #ffd487
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft Yahei", sans-serif;
  line-height: 1.88
}

a {
  color: var(--cyan)
}

.progress {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--red))
}

.top {
  border-bottom: 1px solid var(--line);
  background: #0a1723e8;
  backdrop-filter: blur(15px);
  position: sticky;
  top: 0;
  z-index: 20
}

.top-inner {
  max-width: 1160px;
  margin: auto;
  padding: 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px
}

.logo {
  font-weight: 850;
  letter-spacing: .08em;
  font-size: 14px
}

.logo b {
  color: var(--cyan)
}

.top a {
  font-size: 12px;
  text-decoration: none;
  color: #c4d6e1
}

.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 78% 30%, #173c57 0%, transparent 45%), linear-gradient(160deg, #0e2537, #07111d 75%);
  border-bottom: 1px solid var(--line)
}

.hero-inner {
  max-width: 1080px;
  margin: auto;
  padding: 74px 22px 66px
}

.tag {
  display: inline-flex;
  border: 1px solid #426075;
  background: #122d41;
  border-radius: 100px;
  padding: 5px 14px;
  color: #9ce9f3;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .07em
}

.hero h1 {
  font-size: clamp(34px, 6.6vw, 72px);
  line-height: 1.21;
  letter-spacing: -.035em;
  max-width: 980px;
  margin: 23px 0 15px
}

.hero h1 em {
  font-style: normal;
  color: var(--red)
}

.hero-sub {
  font-size: clamp(16px, 2.4vw, 22px);
  color: #c4d8e4;
  max-width: 780px
}

.meta {
  font-size: 12px;
  color: #9eb0be;
  margin: 20px 0 28px
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 900px
}

.stat {
  background: #102537b8;
  border: 1px solid #28445a;
  border-radius: 14px;
  padding: 17px 19px
}

.stat strong {
  display: block;
  font-size: clamp(21px, 3vw, 34px);
  color: white;
  line-height: 1.3
}

.stat small {
  display: block;
  color: #b1c4d1;
  font-size: 12px;
  margin-top: 7px
}

.hero-note {
  margin-top: 18px;
  color: #a9b9c7;
  font-size: 12px
}

.layout {
  max-width: 1160px;
  margin: auto;
  display: grid;
  grid-template-columns: 245px minmax(0, 1fr);
  gap: 42px;
  padding: 45px 22px
}

.side {
  align-self: start;
  position: sticky;
  top: 82px;
  max-height: calc(100vh - 95px);
  overflow: auto
}

.side-label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
  font-weight: 800;
  margin-bottom: 14px
}

.side a {
  display: block;
  padding: 9px 12px;
  border-left: 2px solid #284253;
  text-decoration: none;
  color: #b9cad7;
  font-size: 12px;
  line-height: 1.5
}

.side a:hover {
  border-left-color: var(--cyan);
  color: white
}

.article {
  min-width: 0
}

.lead {
  font-size: 19px;
  line-height: 1.85;
  color: #e1edf5;
  border-left: 4px solid var(--red);
  padding: 8px 0 8px 20px;
  margin: 0 0 40px
}

.article-section {
  padding: 38px 0 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 75px
}

.eyebrow {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em
}

.article-section h2 {
  font-size: clamp(23px, 3vw, 33px);
  line-height: 1.4;
  letter-spacing: -.02em;
  margin: 11px 0 23px
}

.article-section p {
  font-size: 16px;
  color: #c7d5e0;
  margin: 0 0 22px;
  line-height: 2.03
}

.note {
  padding: 20px 22px;
  border: 1px solid #40516a;
  background: #122333;
  border-radius: 14px;
  color: #c5d9e8;
  font-size: 14px;
  margin: 28px 0 38px
}

.note strong {
  color: var(--gold)
}

.sources {
  border-top: 1px solid var(--line);
  padding: 34px 0 70px
}

.sources h2 {
  font-size: 23px
}

.sources li {
  margin: 11px 0;
  color: #b6c7d4;
  font-size: 14px
}

.foot {
  border-top: 1px solid var(--line);
  padding: 25px 20px 45px;
  text-align: center;
  font-size: 12px;
  color: #93a8b8
}

.mobile-toc {
  display: none
}

.reading {
  font-size: 12px;
  color: #b5c9d7
}

.share {
  border: 1px solid #365268;
  border-radius: 9px;
  background: #13293b;
  color: #eaf3fa;
  padding: 7px 11px;
  cursor: pointer;
  font: inherit;
  font-size: 12px
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px
}

@media (max-width:760px) {
  .layout {
    display: block;
    padding: 25px 20px
  }

  .side {
    display: none
  }

  .hero-inner {
    padding: 49px 20px 46px
  }

  .stats {
    gap: 7px
  }

  .stat {
    padding: 13px 9px;
    border-radius: 10px
  }

  .stat strong {
    font-size: clamp(16px, 5vw, 24px)
  }

  .stat small {
    font-size: 10px
  }

  .mobile-toc {
    display: block;
    margin: 0 0 28px;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px 15px;
    background: #102231
  }

  .mobile-toc summary {
    cursor: pointer;
    color: var(--cyan);
    font-weight: 700
  }

  .mobile-toc a {
    display: block;
    padding: 8px 2px;
    font-size: 13px;
    text-decoration: none;
    color: #d0e2ed
  }

  .article-section {
    padding: 30px 0 16px
  }

  .article-section p {
    font-size: 15px;
    line-height: 2
  }

  .lead {
    font-size: 17px
  }
}

html[dir="rtl"] .side,
html[dir="rtl"] .article,
html[dir="rtl"] .hero {
  text-align: right
}

.logo {
  direction: ltr;
  unicode-bidi: isolate
}

.stat strong {
  unicode-bidi: plaintext
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end
}

@media (max-width:600px) {
  .top-inner {
    flex-wrap: wrap
  }

  .toolbar {
    justify-content: flex-start;
    gap: 8px
  }

  .langselect {
    max-width: 100%
  }
}

.stat {
  min-width: 0
}

.stat strong {
  overflow-wrap: anywhere
}

.article-section h2,
.side a,
.mobile-toc a {
  overflow-wrap: anywhere
}

html[dir="rtl"] .article-section p {
  unicode-bidi: plaintext
}

.langselect {
  background: #102b40;
  color: #fff;
  border: 1px solid #40657a;
  border-radius: 9px;
  padding: 7px 10px;
  font: inherit;
  font-size: 13px;
  max-width: 132px
}

.langselect option {
  color: #111;
  background: white
}

.top-inner {
  flex-wrap: wrap
}

.article-section {
  scroll-margin-top: 90px
}

[dir="rtl"] .lead {
  border-left: 0;
  border-right: 4px solid var(--red);
  padding: 8px 20px 8px 0
}

[dir="rtl"] .side a {
  border-left: 0;
  border-right: 2px solid #284253
}

@media (max-width:760px) {
  .top-inner {
    padding: 10px 12px
  }

  .reading {
    display: none
  }

  .hero h1 {
    font-size: clamp(30px, 7vw, 48px)
  }
}