:root {
  --brand-primary: #6C3FC5;
  --brand-primary-dark: #4A2A8C;
  --brand-primary-light: #8B5FE0;
  --brand-accent: #FFD166;
  --brand-accent-dark: #E0B44A;
  --brand-cyan: #4FD1C5;
  --brand-pink: #F06292;
  --bg-base: #0E0A1A;
  --bg-elevated: #16102A;
  --bg-card: rgba(38, 26, 66, 0.55);
  --bg-card-solid: #1E1535;
  --bg-glass: rgba(108, 63, 197, 0.12);
  --text-primary: #F2EEFF;
  --text-secondary: #B8AED6;
  --text-muted: #7E739E;
  --border-glass: rgba(139, 95, 224, 0.28);
  --border-soft: rgba(139, 95, 224, 0.14);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.42);
  --shadow-glow: 0 0 40px rgba(108, 63, 197, 0.35);
  --gradient-hero: linear-gradient(135deg, #1B1035 0%, #3A1F7A 40%, #6C3FC5 75%, #8B5FE0 100%);
  --gradient-accent: linear-gradient(120deg, #FFD166 0%, #F06292 50%, #6C3FC5 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(139, 95, 224, 0.5), rgba(255, 209, 102, 0.2), rgba(79, 209, 197, 0.3));
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-base);
  background-image:
    radial-gradient(ellipse 80% 50% at 15% -5%, rgba(108, 63, 197, 0.28), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(240, 98, 146, 0.12), transparent 55%),
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(79, 209, 197, 0.08), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--brand-primary-light);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.35;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1.1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 5px;
  border-radius: 4px;
  background: var(--gradient-accent);
  box-shadow: 0 0 14px rgba(255, 209, 102, 0.5);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--brand-accent);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

ul,
ol {
  margin: 0 0 1.25rem 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

li::marker {
  color: var(--brand-accent);
}

blockquote {
  margin: 1rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--brand-accent);
  background: var(--bg-card);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-soft);
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-card);
}

blockquote p {
  margin-bottom: 0;
  font-style: italic;
  color: var(--text-primary);
}

time {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem clamp(1rem, 4vw, 2.5rem);
  min-height: var(--header-height);
  background: rgba(14, 10, 26, 0.72);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}

.brand a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  transition: transform var(--transition-fast);
}

.brand a:hover {
  color: var(--text-primary);
  transform: scale(1.03);
}

.brand svg {
  flex-shrink: 0;
  border-radius: 50%;
  box-shadow: 0 0 18px rgba(108, 63, 197, 0.6);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.brand a:hover svg {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 0 28px rgba(255, 209, 102, 0.55);
}

header nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.25rem;
  margin: 0;
  list-style: none;
  justify-content: flex-end;
}

header nav li {
  margin: 0;
  padding: 0;
}

header nav a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

header nav a:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
  border-color: var(--border-glass);
  transform: translateY(-2px);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem) 3rem;
}

main > section {
  position: relative;
  margin: 2.5rem 0;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow-card);
  animation: fadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

main > section::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient-card-border);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
  transition: opacity var(--transition-smooth);
}

main > section:hover {
  border-color: var(--border-glass);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-3px);
}

main > section:hover::after {
  opacity: 1;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

#hero {
  margin-top: 2rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--gradient-hero);
  border: none;
  overflow: hidden;
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 22%, rgba(255, 209, 102, 0.35), transparent 42%),
    radial-gradient(circle at 12% 85%, rgba(79, 209, 197, 0.22), transparent 45%);
  z-index: -1;
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.7), rgba(139, 95, 224, 0.5), rgba(79, 209, 197, 0.6));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

#hero h1 {
  font-size: clamp(1.9rem, 5vw, 3rem);
  background: linear-gradient(100deg, #FFFFFF 0%, #FFD166 45%, #FFB3D1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-shadow: 0 0 40px rgba(255, 209, 102, 0.25);
}

#hero p {
  color: rgba(242, 238, 255, 0.9);
  max-width: 70ch;
}

#hero .banner {
  margin-top: 2rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#hero .banner:hover {
  transform: scale(1.01);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.55), 0 0 40px rgba(255, 209, 102, 0.18);
}

#hero figure {
  margin: 0;
  position: relative;
}

#hero figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#hero figcaption {
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(14, 10, 26, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  letter-spacing: 0.05em;
}

#news article {
  margin: 1.25rem 0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), background var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

#news article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-smooth);
}

#news article:hover {
  transform: translateX(8px);
  border-color: var(--border-glass);
  box-shadow: var(--shadow-card), 0 0 24px rgba(108, 63, 197, 0.25);
  background: rgba(38, 26, 66, 0.8);
}

#news article:hover::before {
  transform: scaleY(1);
}

#news article h3 {
  margin-top: 0;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

#news article:hover h3 {
  color: var(--brand-accent);
}

#news article p {
  margin-bottom: 0.5rem;
}

#news article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-accent);
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: gap var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

#news article a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

#news article a:hover {
  color: var(--brand-primary-light);
  border-bottom-color: var(--brand-primary-light);
}

#news article a:hover::after {
  transform: translateX(4px);
}

#howto ol,
#howto ul {
  counter-reset: none;
}

#howto ol li {
  position: relative;
  padding: 0.5rem 0 0.5rem 0.25rem;
}

#faq h3 {
  position: relative;
  padding: 1rem 1.25rem;
  margin-top: 0.75rem;
  margin-bottom: 0;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  cursor: default;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

#faq h3:hover {
  background: rgba(108, 63, 197, 0.2);
  border-color: var(--border-glass);
  color: var(--brand-accent);
}

#faq h3 + p {
  padding: 1rem 1.25rem 1.25rem;
  margin-bottom: 0.75rem;
  background: rgba(22, 16, 42, 0.6);
  border: 1px solid var(--border-soft);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.95rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

#faq h3:hover + p {
  border-color: var(--border-glass);
}

#contact ul {
  list-style: none;
  margin-left: 0;
  display: grid;
  gap: 0.5rem;
}

#contact ul li {
  padding: 0.6rem 1rem;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

#contact ul li:hover {
  transform: translateX(5px);
  border-color: var(--border-glass);
  background: rgba(108, 63, 197, 0.16);
}

#sitemap ul,
#links ul {
  list-style: none;
  margin-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.5rem;
}

#sitemap ul li,
#links ul li {
  margin: 0;
  padding: 0;
}

#sitemap a,
#links a {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
  border-color: var(--border-glass);
  transform: translateY(-2px);
}

footer[role="contentinfo"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem clamp(1rem, 4vw, 2.5rem) 3rem;
  border-top: 1px solid var(--border-soft);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

footer[role="contentinfo"] section {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

footer[role="contentinfo"] section:hover {
  border-color: var(--border-glass);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

footer[role="contentinfo"] h2 {
  font-size: 1rem;
  padding-left: 0.75rem;
  margin-bottom: 0.75rem;
  color: var(--brand-accent);
}

footer[role="contentinfo"] h2::before {
  width: 3px;
}

footer[role="contentinfo"] p {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 0;
}

footer[role="contentinfo"] > p {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--border-soft);
}

::selection {
  background: rgba(108, 63, 197, 0.55);
  color: #FFFFFF;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-primary-dark));
  border-radius: 999px;
  border: 2px solid var(--bg-base);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-primary-light), var(--brand-primary));
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 900px) {
  header[role="banner"] {
    flex-direction: column;
    align-items: stretch;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .brand a {
    justify-content: center;
  }

  header nav {
    justify-content: center;
  }

  header nav ul {
    justify-content: center;
  }

  header nav a {
    padding: 0.4rem 0.7rem;
    font-size: 0.85rem;
  }

  main > section {
    margin: 1.75rem 0;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  header nav ul {
    gap: 0.15rem;
  }

  header nav a {
    padding: 0.35rem 0.6rem;
    font-size: 0.8rem;
  }

  main > section {
    padding: 1.25rem;
    border-radius: var(--radius-md);
  }

  #hero {
    padding: 1.5rem 1.25rem;
  }

  h2 {
    padding-left: 0.9rem;
  }

  #news article {
    padding: 1rem 1.1rem;
  }

  #news article:hover {
    transform: translateY(-2px);
  }

  #contact ul li:hover {
    transform: translateY(-2px);
  }

  footer[role="contentinfo"] {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding-top: 1.75rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-base: #F4F1FB;
    --bg-elevated: #FFFFFF;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-solid: #FFFFFF;
    --bg-glass: rgba(108, 63, 197, 0.08);
    --text-primary: #1B1035;
    --text-secondary: #4A3F6B;
    --text-muted: #7E739E;
    --border-glass: rgba(108, 63, 197, 0.32);
    --border-soft: rgba(108, 63, 197, 0.14);
    --shadow-card: 0 8px 32px rgba(74, 42, 140, 0.12);
    --shadow-glow: 0 0 40px rgba(108, 63, 197, 0.18);
    --gradient-hero: linear-gradient(135deg, #6C3FC5 0%, #8B5FE0 45%, #B39DF0 100%);
  }

  body {
    background-image:
      radial-gradient(ellipse 80% 50% at 15% -5%, rgba(108, 63, 197, 0.14), transparent 60%),
      radial-gradient(ellipse 60% 40% at 90% 10%, rgba(240, 98, 146, 0.08), transparent 55%),
      radial-gradient(ellipse 70% 50% at 50% 100%, rgba(79, 209, 197, 0.06), transparent 60%);
  }

  header[role="banner"] {
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 4px 30px rgba(74, 42, 140, 0.1);
  }

  header nav a {
    color: var(--text-secondary);
  }

  header nav a:hover {
    color: var(--brand-primary-dark);
  }

  #hero h1 {
    background: linear-gradient(100deg, #FFFFFF 0%, #FFE29A 45%, #FFC4DC 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  #hero p {
    color: rgba(255, 255, 255, 0.94);
  }

  h3 {
    color: var(--brand-primary-dark);
  }

  #faq h3 + p {
    background: rgba(255, 255, 255, 0.7);
  }

  #news article:hover {
    background: #FFFFFF;
  }

  footer[role="contentinfo"] h2 {
    color: var(--brand-primary-dark);
  }

  ::-webkit-scrollbar-track {
    background: #F4F1FB;
  }

  ::-webkit-scrollbar-thumb {
    border-color: #F4F1FB;
  }
}