:root {
  /* Original Orange Theme Tokens */
  --bg: #0d1220;
  --bg-soft: #121a2b;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  
  --text: #f5f7fb;
  --text-inverse: #f5f7fb;
  --text-secondary: #f5f7fb;
  --muted: #b7c0d4;
  --line: rgba(255, 255, 255, 0.14);
  
  --primary: #ff8a1d;
  --primary-strong: #ff6a00;
  --accent: #ffd166;
  
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  
  --container: 1120px;
  --header-h: 80px;
  
  /* Typography Scale */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 24px;
  --text-2xl: 56px;
  --text-3xl: 80px;
  
  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 10px;
  --space-4: 12px;
  --space-5: 16px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg);
  background:
    radial-gradient(circle at top, rgba(255, 138, 29, 0.15), transparent 28%),
    linear-gradient(180deg, #111827 0%, #0d1220 54%, #0a0f19 100%);
  color: var(--text);
  font-size: var(--text-md);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-logo {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.brand-text {
  min-width: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--muted);
  opacity: 0.8;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: var(--transition);
}

.nav a:hover,
.nav a.is-active {
  color: var(--primary);
  background: rgba(255, 138, 29, 0.1);
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--panel-strong);
  border-radius: 999px;
  padding: 4px;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15);
}

.lang-button {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 999px;
  transition: var(--transition);
  position: relative;
  z-index: 2;
}

.lang-button.is-active {
  color: var(--text);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* 这个是滑块背后的那个白色/橙色发光块 */
.lang-button.is-active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-strong), var(--primary));
  border-radius: 999px;
  z-index: -1;
  box-shadow: 0 2px 8px rgba(255, 138, 29, 0.3);
}

.lang-button:hover:not(.is-active) {
  color: var(--text);
}

.hero {
  padding: 72px 0 28px;
}

.hero-grid,
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 24px;
}

.panel,
.contact-card,
.policy-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card {
  background: var(--panel);
  border-radius: var(--radius-lg);
  padding: 48px;
  border: 1px solid var(--line);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent);
  font-size: 0.92rem;
}

.page-hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(2.1rem, 4vw, 4rem);
  line-height: 1.08;
}

.hero h1 {
  font-size: 56px;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #b7c0d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-summary,
.muted {
  color: var(--muted);
}

.hero-subtitle {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-summary {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 40px;
  max-width: 90%;
  line-height: 1.7;
}

.hero-actions,
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 138, 29, 0.35);
}

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 138, 29, 0.45);
}

.button-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.hero-aside,
.stack {
  display: grid;
  gap: 24px;
}

.info-card {
  padding: 28px;
}

.section-header h2,
.panel h2,
.contact-card h2,
.policy-card h2 {
  margin: 0 0 14px;
  font-size: 1.4rem;
}

.info-card h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--line);
  padding-bottom: var(--space-5);
  color: var(--text);
}

.info-list,
.detail-list,
.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.detail-list li,
.plain-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.detail-list li:last-child,
.plain-list li:last-child {
  border-bottom: 0;
}

.info-list li {
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.info-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.info-list strong {
  color: var(--primary);
  font-weight: 600;
}

.section {
  padding: 28px 0 72px;
}

.section-header {
  max-width: 780px;
  margin-bottom: 24px;
}

.section-header p,
.panel p,
.contact-card p,
.policy-card p {
  color: var(--muted);
  line-height: 1.8;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

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

.card,
.panel,
.contact-card,
.policy-card {
  padding: 28px;
}

.card h3,
.panel h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.card p,
.panel li,
.contact-card li,
.policy-card li {
  color: var(--muted);
  line-height: 1.8;
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #f9d39a;
  border: 1px solid rgba(255, 209, 102, 0.18);
}

.page-hero {
  padding: 60px 0 20px;
}

.page-hero-card {
  padding: 34px 36px;
}

.page-hero p {
  max-width: 820px;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 1.05fr);
  gap: 24px;
}

.policy-card + .policy-card,
.contact-card + .contact-card {
  margin-top: 24px;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 12px;
  background: rgba(7, 10, 18, 0.7);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  padding: 28px 0;
  align-items: center;
}

.footer-brand {
  display: grid;
  gap: 6px;
}

.footer-meta {
  color: var(--muted);
}

[data-lang-content] {
  display: none;
}

html[data-lang="zh"] [data-lang-content="zh"],
html[data-lang="en"] [data-lang-content="en"] {
  display: initial;
}

html[data-lang="zh"] [data-lang-block="zh"],
html[data-lang="en"] [data-lang-block="en"] {
  display: block;
}

html[data-lang="zh"] [data-lang-flex="zh"],
html[data-lang="en"] [data-lang-flex="en"] {
  display: flex;
}

[data-lang-block],
[data-lang-flex] {
  display: none;
}

@media (max-width: 980px) {
  .header-inner,
  .hero-grid,
  .content-grid,
  .contact-grid,
  .footer-inner,
  .cards,
  .cards-2 {
    grid-template-columns: 1fr;
  }

  .header-inner {
    display: grid;
  }

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

  .hero-card,
  .page-hero-card {
    padding: 30px 24px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 42px;
  }

  .nav {
    gap: 6px;
  }

  .nav a,
  .lang-button {
    padding: 8px 12px;
  }

  .card,
  .panel,
  .contact-card,
  .policy-card {
    padding: 22px;
  }

  .button {
    width: 100%;
  }
}