:root {
  color-scheme: dark;
  --bg: #071019;
  --bg-2: #0d1830;
  --panel: rgba(13, 22, 38, 0.82);
  --panel-strong: rgba(18, 28, 48, 0.96);
  --text: #f4efe7;
  --muted: #b8c1d2;
  --line: rgba(173, 198, 255, 0.16);
  --accent: #6de2ff;
  --accent-2: #f4c774;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, rgba(109, 226, 255, 0.2), transparent 30%),
    radial-gradient(circle at 85% 12%, rgba(244, 199, 116, 0.16), transparent 25%),
    linear-gradient(180deg, #071019 0%, #0b1323 48%, #050913 100%);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
  z-index: 10;
}

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

.page-shell {
  width: min(1260px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 32px;
}

.masthead {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: center;
  padding: 18px 20px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 18, 32, 0.92), rgba(13, 22, 40, 0.76));
  box-shadow: var(--shadow);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(145deg, #6de2ff, #1e5b78);
  color: #041019;
  font: 800 1.05rem/1 "Avenir Next", "PingFang SC", sans-serif;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.brand-lockup strong,
.brand-lockup p {
  display: block;
  margin: 0;
}

.brand-lockup p {
  color: var(--muted);
  font-size: 0.92rem;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 16px;
  color: var(--muted);
}

.topnav a {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.03);
}

.topnav a:hover,
.topnav a:focus-visible {
  border-color: rgba(109, 226, 255, 0.34);
  background: rgba(109, 226, 255, 0.08);
}

main {
  padding-top: 20px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.62fr);
  gap: 18px;
  align-items: stretch;
}

.hero-card,
.section,
.about-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-card--main {
  padding: 30px;
  position: relative;
  overflow: hidden;
}

.hero-card--main::after {
  content: "";
  position: absolute;
  inset: auto -40px -70px auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(109, 226, 255, 0.18), transparent 68%);
  pointer-events: none;
}

.hero-card--rail {
  padding: 22px;
  background: linear-gradient(180deg, rgba(16, 25, 45, 0.95), rgba(11, 18, 31, 0.92));
}

.eyebrow,
.kicker,
.panel-kicker {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(2rem, 4.2vw, 4rem);
  line-height: 1.08;
  margin-bottom: 16px;
}

h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(1.55rem, 2.8vw, 2.3rem);
  line-height: 1.15;
  margin-bottom: 0;
}

h3 {
  font-size: 1.08rem;
  line-height: 1.35;
  margin-bottom: 8px;
}

.lead {
  font-size: 1.08rem;
  line-height: 1.9;
  color: #d9e1ef;
  margin-bottom: 18px;
  max-width: 62ch;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-pills span {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(109, 226, 255, 0.09);
  color: #c5f6ff;
  border: 1px solid rgba(109, 226, 255, 0.12);
}

.rail-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid rgba(109, 226, 255, 0.12);
}

.rail-step:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.rail-step strong {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: rgba(109, 226, 255, 0.12);
  color: var(--accent);
}

.rail-step span,
.atlas-card p,
.case-card p,
.judge-grid p,
.route-list p,
.about-card p {
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 0;
}

.section {
  padding: 24px 26px;
  margin-top: 18px;
}

.section--map {
  background:
    linear-gradient(180deg, rgba(10, 17, 29, 0.96), rgba(9, 14, 26, 0.88));
}

.section--cases {
  background:
    linear-gradient(180deg, rgba(16, 24, 42, 0.92), rgba(10, 16, 29, 0.86));
}

.section--judge {
  background:
    linear-gradient(180deg, rgba(14, 21, 39, 0.9), rgba(8, 13, 24, 0.85));
}

.section--route {
  background:
    linear-gradient(180deg, rgba(12, 19, 34, 0.9), rgba(7, 12, 21, 0.88));
}

.section-heading {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.atlas-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 16px;
}

.atlas-card,
.case-card,
.judge-grid article {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(173, 198, 255, 0.12);
}

.atlas-card--wide {
  background: linear-gradient(160deg, rgba(109, 226, 255, 0.11), rgba(255, 255, 255, 0.03));
}

.atlas-index {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--accent-2);
  font-weight: 800;
}

.case-stack {
  display: grid;
  gap: 14px;
}

.case-card {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.case-label {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 800;
}

.judge-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.judge-number {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 13px;
  margin-bottom: 12px;
  color: #08111e;
  background: linear-gradient(145deg, #6de2ff, #c9f3ff);
  font-weight: 900;
}

.route-list {
  display: grid;
  gap: 12px;
}

.route-list p {
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(173, 198, 255, 0.12);
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 4px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.about-layout {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 150px);
  padding: 28px 0 10px;
}

.about-card {
  width: min(760px, 100%);
  padding: 28px;
  background: linear-gradient(180deg, rgba(14, 23, 40, 0.92), rgba(9, 14, 26, 0.92));
}

.home-link {
  display: inline-flex;
  margin-top: 8px;
  padding: 11px 15px;
  border-radius: 999px;
  background: var(--accent);
  color: #041019;
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 1020px) {
  .hero-grid,
  .atlas-grid,
  .judge-grid,
  .case-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 18px, 1260px);
    padding-top: 10px;
  }

  .masthead {
    grid-template-columns: 1fr;
    gap: 14px;
    border-radius: 24px;
    padding: 16px;
  }

  .topnav {
    justify-content: flex-start;
  }

  .hero-card--main,
  .hero-card--rail,
  .section,
  .about-card {
    border-radius: 24px;
  }

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