:root {
  --c-bg: #0e0e1a;
  --c-bg-soft: #16162b;
  --c-surface: rgba(255, 255, 255, 0.05);
  --c-surface-strong: rgba(255, 255, 255, 0.09);
  --c-border: rgba(255, 255, 255, 0.1);
  --c-text: #eef0ff;
  --c-text-soft: #b6b9d6;
  --c-text-dim: #8a8db0;
  --c-primary: #ffd166;
  --c-primary-deep: #ffb703;
  --c-accent: #7c6cff;
  --c-accent-2: #38e1c6;
  --c-link: #9d8fff;
  --grad-hero: linear-gradient(135deg, #1a1a2e 0%, #2a1f4d 45%, #3a2a5e 100%);
  --grad-accent: linear-gradient(120deg, #ffd166 0%, #ff9e6d 50%, #7c6cff 100%);
  --grad-card: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px rgba(255, 209, 102, 0.25), 0 12px 40px rgba(124, 108, 255, 0.25);
  --blur: 18px;
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --c-bg: #f4f5fb;
    --c-bg-soft: #ffffff;
    --c-surface: rgba(255, 255, 255, 0.72);
    --c-surface-strong: rgba(255, 255, 255, 0.9);
    --c-border: rgba(26, 26, 46, 0.1);
    --c-text: #1a1a2e;
    --c-text-soft: #454866;
    --c-text-dim: #6b6e8c;
    --c-link: #5b4bd6;
    --grad-hero: linear-gradient(135deg, #ffffff 0%, #ece9ff 45%, #e3f4ff 100%);
    --grad-card: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.6));
    --shadow-sm: 0 4px 16px rgba(26, 26, 46, 0.08);
    --shadow-md: 0 14px 40px rgba(26, 26, 46, 0.12);
    --shadow-glow: 0 0 0 1px rgba(124, 108, 255, 0.18), 0 14px 40px rgba(124, 108, 255, 0.16);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(124, 108, 255, 0.22), transparent 60%),
    radial-gradient(900px 500px at 0% 10%, rgba(56, 225, 198, 0.12), transparent 55%),
    var(--c-bg);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--c-link);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--c-primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  padding-left: 1.25rem;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
  font-weight: 700;
}

h1 { font-size: clamp(1.7rem, 4vw, 2.7rem); }
h2 { font-size: clamp(1.35rem, 3vw, 1.9rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.35rem); }
h4 { font-size: 1.05rem; }

p {
  margin: 0 0 1em;
  color: var(--c-text-soft);
}

strong {
  color: var(--c-text);
  font-weight: 700;
}

blockquote {
  margin: 1.2em 0;
  padding: 1em 1.2em;
  border-left: 3px solid var(--c-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--c-surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

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

time {
  color: var(--c-text-dim);
  font-size: 0.85rem;
}

/* ============ Header ============ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 14, 26, 0.62);
  backdrop-filter: blur(var(--blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
  border-bottom: 1px solid var(--c-border);
}

@media (prefers-color-scheme: light) {
  #site-header {
    background: rgba(255, 255, 255, 0.7);
  }
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 1.2rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.45rem 1.25rem;
  font-size: 0.78rem;
  color: var(--c-text-dim);
  border-bottom: 1px solid var(--c-border);
}

#site-header nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
}

#site-header nav > a[aria-label] {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
  transition: filter 0.3s var(--ease);
}

#site-header nav > a[aria-label]:hover {
  filter: brightness(1.2) drop-shadow(0 0 12px rgba(255, 209, 102, 0.5));
}

#site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1 1 auto;
}

#site-header nav ul li a {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  font-size: 0.88rem;
  color: var(--c-text-soft);
  border-radius: var(--radius-pill);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

#site-header nav ul li a:hover,
#site-header nav ul li a:focus-visible {
  color: var(--c-text);
  background: var(--c-surface-strong);
  transform: translateY(-2px);
}

#site-header nav form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 0 1 300px;
  min-width: 0;
}

#site-header nav form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#site-header nav form[role="search"] input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.5rem 0.9rem;
  font: inherit;
  font-size: 0.85rem;
  color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

#site-header nav form[role="search"] input::placeholder {
  color: var(--c-text-dim);
}

#site-header nav form[role="search"] input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(255, 209, 102, 0.18);
  outline: none;
}

#site-header nav form[role="search"] button {
  flex: 0 0 auto;
  padding: 0.5rem 1rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #1a1a2e;
  background: var(--grad-accent);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s var(--ease);
}

#site-header nav form[role="search"] button:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 8px 24px rgba(255, 158, 109, 0.35);
}

/* ============ Main layout ============ */
main {
  display: block;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

main > section {
  position: relative;
  margin: 0 0 1.75rem;
  padding: 1.75rem clamp(1.1rem, 3vw, 2.25rem);
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(140%);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  opacity: 0;
  transform: translateY(28px);
  animation: riseIn 0.8s var(--ease) forwards;
  animation-timeline: view();
  animation-range: entry 0% cover 28%;
}

main > section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  pointer-events: none;
}

@supports not (animation-timeline: view()) {
  main > section {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

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

main > section:hover {
  border-color: rgba(255, 209, 102, 0.28);
  box-shadow: var(--shadow-md);
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

/* ============ Hero ============ */
#hero {
  background: var(--grad-hero);
  border-radius: var(--radius-lg);
  padding: clamp(1.6rem, 4vw, 3rem);
  isolation: isolate;
}

#hero::after {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 60%;
  height: 120%;
  background: radial-gradient(circle at 70% 30%, rgba(255, 209, 102, 0.25), transparent 60%);
  filter: blur(40px);
  z-index: -1;
  pointer-events: none;
  animation: floatGlow 9s ease-in-out infinite alternate;
}

@keyframes floatGlow {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-30px, 20px, 0) scale(1.08); }
}

#hero h1 {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  max-width: 22ch;
}

#hero > p {
  max-width: 62ch;
  font-size: 1.02rem;
}

.hero-banner {
  margin: 1.5rem 0;
  padding: 0.6rem;
  border-radius: var(--radius-md);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow-glow);
  overflow: hidden;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.hero-banner:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: 0 0 0 1px rgba(255, 209, 102, 0.35), 0 20px 60px rgba(124, 108, 255, 0.35);
}

.hero-banner svg {
  border-radius: var(--radius-sm);
}

#hero ul[aria-label] {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.9rem;
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

#hero ul[aria-label] li {
  padding: 0.9rem 1rem;
  font-size: 0.85rem;
  color: var(--c-text-soft);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), border-color 0.35s var(--ease);
}

#hero ul[aria-label] li:hover {
  transform: translateY(-4px);
  background: var(--c-surface-strong);
  border-color: rgba(255, 209, 102, 0.35);
}

#hero ul[aria-label] strong {
  display: block;
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  line-height: 1.2;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ Breadcrumb ============ */
main > nav[aria-label="面包屑导航"] {
  margin: 0 0 1.5rem;
  padding: 0 0.25rem;
  font-size: 0.85rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--c-text-dim);
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--c-text-dim);
  opacity: 0.6;
}

main > nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--c-text-soft);
}

/* ============ Lists inside sections ============ */
main > section > ul,
main > section > ol {
  display: grid;
  gap: 0.55rem;
  margin: 0.5rem 0 1.2rem;
}

main > section > ul li,
main > section > ol li {
  color: var(--c-text-soft);
  padding: 0.35rem 0.25rem;
  border-bottom: 1px dashed var(--c-border);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

main > section > ul li:hover,
main > section > ol li:hover {
  color: var(--c-text);
  padding-left: 0.6rem;
}

main > section > ul li:last-child,
main > section > ol li:last-child {
  border-bottom: none;
}

/* ============ Cards / articles ============ */
#news article,
#articles article {
  position: relative;
  margin: 0 0 1rem;
  padding: 1.15rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.35s var(--ease);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  background: var(--c-surface-strong);
  border-color: rgba(124, 108, 255, 0.4);
  box-shadow: var(--shadow-md);
}

#news article h3,
#articles article h3 {
  margin-bottom: 0.35rem;
  color: var(--c-text);
}

#news article h3::before,
#articles article h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.55rem;
  border-radius: 50%;
  background: var(--grad-accent);
  vertical-align: middle;
  transition: transform 0.35s var(--ease);
}

#news article:hover h3::before,
#articles article:hover h3::before {
  transform: scale(1.5);
}

#articles article a {
  display: inline-block;
  margin-top: 0.25rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text);
  background: var(--c-surface-strong);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  transition: background 0.3s var(--ease), color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#articles article a:hover {
  background: var(--grad-accent);
  color: #1a1a2e;
  transform: translateX(4px);
  box-shadow: 0 6px 20px rgba(255, 158, 109, 0.35);
}

/* ============ FAQ ============ */
#faq details {
  margin: 0 0 0.75rem;
  padding: 0;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  overflow: hidden;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#faq details:hover {
  border-color: rgba(255, 209, 102, 0.35);
  background: var(--c-surface-strong);
}

#faq details[open] {
  border-color: rgba(255, 209, 102, 0.45);
  box-shadow: var(--shadow-glow);
}

#faq summary {
  position: relative;
  padding: 1rem 3rem 1rem 1.15rem;
  font-weight: 600;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
  transition: color 0.25s var(--ease);
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary::after {
  content: "+";
  position: absolute;
  right: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  line-height: 1;
  color: #1a1a2e;
  background: var(--grad-accent);
  border-radius: 50%;
  transition: transform 0.35s var(--ease), filter 0.35s var(--ease);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  filter: brightness(1.1);
}

#faq summary:hover {
  color: var(--c-primary);
}

#faq details p {
  margin: 0;
  padding: 0 1.15rem 1.15rem;
  font-size: 0.95rem;
  color: var(--c-text-soft);
  animation: fadeIn 0.4s var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Contact ============ */
#contact address {
  font-style: normal;
  display: grid;
  gap: 0.4rem;
  padding: 1.15rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

#contact address p {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  font-size: 0.95rem;
}

#contact address a {
  font-weight: 600;
  color: var(--c-primary);
}

#contact address a:hover {
  color: var(--c-accent-2);
}

/* ============ Sitemap & links ============ */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 0.4rem 0.95rem;
  font-size: 0.85rem;
  color: var(--c-text-soft);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-3px);
  background: var(--grad-accent);
  color: #1a1a2e;
  border-color: transparent;
}

/* ============ Footer ============ */
footer {
  position: relative;
  margin-top: 1rem;
  padding: 2.5rem 1.25rem 2rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(0, 0, 0, 0.25));
  border-top: 1px solid var(--c-border);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

@media (prefers-color-scheme: light) {
  footer {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(236, 233, 255, 0.6));
  }
}

footer > section {
  max-width: var(--maxw);
  margin: 0 auto 1.5rem;
  padding: 1.15rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

footer > section:hover {
  border-color: rgba(124, 108, 255, 0.35);
  transform: translateY(-2px);
}

footer h2 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--c-primary);
}

footer p {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  margin: 0 0 0.5rem;
}

footer > p {
  max-width: var(--maxw);
  margin: 1.5rem auto 0;
  text-align: center;
}

footer > p a {
  display: inline-block;
  padding: 0.5rem 1.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text);
  background: var(--c-surface-strong);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}

footer > p a:hover {
  transform: translateY(-3px);
  background: var(--grad-accent);
  color: #1a1a2e;
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  #site-header nav {
    gap: 0.6rem;
  }
  #site-header nav ul {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.35rem;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }
  #site-header nav ul li a {
    white-space: nowrap;
  }
  #site-header nav form[role="search"] {
    flex: 1 1 220px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  .topbar {
    justify-content: center;
    text-align: center;
    font-size: 0.72rem;
  }
  #site-header nav {
    padding: 0.6rem 0.9rem;
  }
  #site-header nav > a[aria-label] {
    font-size: 1rem;
  }
  main {
    padding: 1rem 0.8rem 2rem;
  }
  main > section {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.1rem;
  }
  #hero {
    padding: 1.4rem 1rem;
  }
  #hero ul[aria-label] {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
  }
  #hero ul[aria-label] li {
    padding: 0.7rem 0.75rem;
    font-size: 0.78rem;
  }
  #faq summary {
    padding: 0.9rem 2.7rem 0.9rem 0.9rem;
    font-size: 0.95rem;
  }
  #faq details p {
    padding: 0 0.9rem 0.9rem;
    font-size: 0.9rem;
  }
  footer {
    padding: 1.75rem 0.8rem 1.5rem;
  }
  footer > section {
    padding: 0.95rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  main > section {
    opacity: 1;
    transform: none;
  }
}

@media print {
  #site-header,
  footer,
  .hero-banner {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    opacity: 1;
    transform: none;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}