:root {
  --bg: #0f0f1a;
  --bg-soft: #16162a;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.09);
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --text: #ecebf5;
  --text-muted: #a5a3bd;
  --text-dim: #7d7b96;
  --accent: #ff5c8a;
  --accent-2: #7c5cff;
  --accent-3: #36d6c3;
  --gradient-banner: linear-gradient(135deg, #2a1a4a 0%, #4a1f5e 35%, #8a2b5c 70%, #ff5c8a 100%);
  --gradient-accent: linear-gradient(135deg, #ff5c8a 0%, #7c5cff 100%);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
  --blur: 16px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 1180px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f4fb;
    --bg-soft: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --glass: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(124, 92, 255, 0.16);
    --text: #1d1a2e;
    --text-muted: #55506e;
    --text-dim: #7a7590;
    --gradient-banner: linear-gradient(135deg, #c8d8ff 0%, #e6c9ff 40%, #ffd0e0 75%, #ffe6c9 100%);
    --shadow: 0 10px 40px rgba(90, 70, 160, 0.16);
    --shadow-soft: 0 4px 20px rgba(90, 70, 160, 0.1);
  }
}

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 92, 138, 0.14), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(124, 92, 255, 0.16), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(54, 214, 195, 0.1), transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover,
a:focus-visible {
  color: var(--accent-2);
}

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

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--text);
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 700;
  padding-bottom: 0.5em;
  position: relative;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 600;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-3);
}

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

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
  color: var(--text-muted);
}

li {
  margin-bottom: 0.35em;
}

blockquote {
  margin: 0 0 1.2em;
  padding: 1.1em 1.4em;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--glass);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  border-left: 4px solid var(--accent);
  color: var(--text-muted);
  font-style: normal;
}

blockquote p {
  margin: 0;
}

time {
  font-size: 0.82rem;
  color: var(--text-dim);
  display: inline-block;
  margin-bottom: 0.4em;
}

address {
  font-style: normal;
}

/* ============ Header / Nav ============ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
  backdrop-filter: blur(var(--blur)) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.7rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header nav > a {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  transition: transform var(--transition), filter var(--transition);
}

header nav > a:hover {
  transform: scale(1.04);
  filter: brightness(1.15);
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

header nav ul li {
  margin: 0;
}

header nav ul a {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

header nav ul a:hover,
header nav ul a:focus-visible {
  color: var(--text);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* ============ Main Layout ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.2rem 3rem;
}

main > section {
  margin-bottom: 2.2rem;
  padding: 1.8rem clamp(1.1rem, 3vw, 2.2rem);
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow-soft);
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

main > section:hover {
  border-color: rgba(255, 92, 138, 0.35);
  box-shadow: var(--shadow);
}

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

main > section:nth-child(1) { animation-delay: 0.02s; }
main > section:nth-child(2) { animation-delay: 0.05s; }
main > section:nth-child(3) { animation-delay: 0.08s; }
main > section:nth-child(4) { animation-delay: 0.11s; }
main > section:nth-child(5) { animation-delay: 0.14s; }

/* ============ Hero Banner ============ */
#home {
  position: relative;
  overflow: hidden;
  background: var(--gradient-banner);
  border: none;
  padding: clamp(2rem, 6vw, 4rem) clamp(1.2rem, 4vw, 3rem);
  color: #fff;
  isolation: isolate;
}

#home::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.22), transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(54, 214, 195, 0.28), transparent 50%);
  z-index: -1;
}

#home::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  filter: blur(10px);
  z-index: -1;
  animation: floatBlob 9s ease-in-out infinite;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-24px, 26px) scale(1.12); }
}

#home h1 {
  background: none;
  -webkit-text-fill-color: #ffffff;
  color: #ffffff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
  max-width: 900px;
}

#home p {
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(0.95rem, 1.4vw, 1.08rem);
  max-width: 860px;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.25);
}

/* ============ Breadcrumb & Anchor Nav ============ */
nav[aria-label="面包屑导航"] ol,
nav[aria-label="页面内锚点导航"] ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.5rem;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  font-size: 0.88rem;
}

nav[aria-label="面包屑导航"] ol li {
  margin: 0;
  color: var(--text-dim);
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: "/";
  margin-right: 0.9rem;
  color: var(--text-dim);
}

nav[aria-label="页面内锚点导航"] ul li {
  margin: 0;
}

nav[aria-label="页面内锚点导航"] ul a {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  color: var(--text-muted);
  background: transparent;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

nav[aria-label="页面内锚点导航"] ul a:hover {
  color: var(--text);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* ============ Articles / News / Cases ============ */
#news article,
#articles article {
  padding: 1.2rem 1.3rem;
  margin-bottom: 1.1rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: rgba(124, 92, 255, 0.4);
  box-shadow: var(--shadow);
}

#news article h3,
#articles article h3 {
  margin-bottom: 0.3em;
}

#articles article a {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-accent);
  box-shadow: 0 4px 16px rgba(255, 92, 138, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

#articles article a:hover {
  transform: translateY(-2px) scale(1.03);
  filter: brightness(1.1);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.45);
}

/* ============ Reviews ============ */
#reviews blockquote {
  position: relative;
  padding-left: 2.4em;
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0.55em;
  top: 0.1em;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.7;
  font-family: Georgia, serif;
}

/* ============ FAQ ============ */
#faq h3 {
  margin-top: 1.3em;
  padding: 0.7em 1em;
  border-radius: var(--radius-sm);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 1rem;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

#faq h3:hover {
  background: var(--bg-card-hover);
  border-color: rgba(54, 214, 195, 0.4);
  transform: translateX(4px);
}

/* ============ HowTo ============ */
#howto h4 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.2em;
}

#howto h4::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 4px rgba(255, 92, 138, 0.16);
}

/* ============ Sitemap ============ */
#sitemap ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem;
}

#sitemap ul li {
  margin: 0;
}

#sitemap ul a {
  display: block;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

#sitemap ul a:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  color: var(--text);
  border-color: rgba(255, 92, 138, 0.4);
}

/* ============ Footer ============ */
footer {
  margin-top: 2rem;
  padding: 2.4rem 1.2rem 2rem;
  text-align: center;
  background: var(--glass);
  border-top: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
}

footer p {
  margin: 0 0 0.5em;
  font-size: 0.9rem;
  color: var(--text-dim);
}

footer nav ul {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 1.2rem;
}

footer nav ul li {
  margin: 0;
}

footer nav ul a {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

footer nav ul a:hover {
  color: var(--accent);
  background: var(--bg-card-hover);
}

/* ============ Scroll Reveal Helper ============ */
@supports (animation-timeline: view()) {
  main > section {
    animation-timeline: view();
    animation-range: entry 0% cover 22%;
  }
}

@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;
  }
}

/* ============ Responsive ============ */
@media (max-width: 860px) {
  header nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  header nav ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.2rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  header nav ul::-webkit-scrollbar {
    display: none;
  }

  header nav ul a {
    white-space: nowrap;
  }

  main {
    padding: 1rem 0.8rem 2.4rem;
  }

  main > section {
    padding: 1.4rem 1.1rem;
    border-radius: var(--radius);
    margin-bottom: 1.6rem;
  }

  h2::after {
    width: 42px;
    height: 3px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  #home {
    padding: 1.8rem 1.1rem;
    border-radius: var(--radius);
  }

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

  nav[aria-label="面包屑导航"] ol,
  nav[aria-label="页面内锚点导航"] ul {
    font-size: 0.8rem;
    padding: 0.7rem 0.8rem;
  }

  #reviews blockquote {
    padding-left: 1.9em;
  }
}

@media (min-width: 1400px) {
  :root {
    --max-width: 1280px;
  }
}

/* ============ Print ============ */
@media print {
  header,
  footer,
  nav[aria-label="页面内锚点导航"],
  nav[aria-label="面包屑导航"] {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    animation: none;
    background: #fff;
  }

  h1 {
    -webkit-text-fill-color: #000;
    color: #000;
    background: none;
  }
}