:root {
  --primary: #1a5fb4;
  --primary-light: #3584e4;
  --primary-lighter: #62a0ea;
  --primary-lightest: #c0d9f7;
  --accent: #9141ac;
  --accent-light: #c061cb;
  --bg: #f6f8fc;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text: #1c2430;
  --text-soft: #4a5568;
  --text-muted: #718096;
  --border: rgba(26, 95, 180, 0.14);
  --border-strong: rgba(26, 95, 180, 0.28);
  --shadow-sm: 0 2px 8px rgba(26, 95, 180, 0.08);
  --shadow: 0 8px 28px rgba(26, 95, 180, 0.12);
  --shadow-lg: 0 18px 48px rgba(26, 95, 180, 0.18);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --gradient-primary: linear-gradient(135deg, #1a5fb4 0%, #3584e4 45%, #62a0ea 100%);
  --gradient-accent: linear-gradient(135deg, #9141ac 0%, #c061cb 55%, #e5a9ee 100%);
  --gradient-banner: linear-gradient(120deg, #0d2f5e 0%, #1a5fb4 38%, #3584e4 68%, #9141ac 100%);
  --gradient-soft: linear-gradient(135deg, rgba(26, 95, 180, 0.08), rgba(145, 65, 172, 0.08));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 0.35s var(--ease);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #62a0ea;
    --primary-light: #99c1f1;
    --primary-lighter: #c0d9f7;
    --primary-lightest: #1a3a5c;
    --accent: #c061cb;
    --accent-light: #e5a9ee;
    --bg: #0b1220;
    --bg-alt: #111a2b;
    --bg-card: rgba(24, 36, 56, 0.72);
    --bg-glass: rgba(20, 30, 48, 0.55);
    --text: #e8eef7;
    --text-soft: #b6c2d4;
    --text-muted: #8494ab;
    --border: rgba(98, 160, 234, 0.18);
    --border-strong: rgba(98, 160, 234, 0.34);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
    --gradient-primary: linear-gradient(135deg, #1a5fb4 0%, #3584e4 50%, #62a0ea 100%);
    --gradient-accent: linear-gradient(135deg, #8134a0 0%, #c061cb 60%, #e5a9ee 100%);
    --gradient-banner: linear-gradient(120deg, #071427 0%, #123a6e 40%, #1a5fb4 70%, #8134a0 100%);
    --gradient-soft: linear-gradient(135deg, rgba(98, 160, 234, 0.1), rgba(192, 97, 203, 0.1));
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(53, 132, 228, 0.14), transparent 60%),
    radial-gradient(ellipse 70% 50% at 95% 5%, rgba(145, 65, 172, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 40% at 50% 110%, rgba(98, 160, 234, 0.1), transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

h1 {
  font-size: clamp(1.6rem, 1.2rem + 2vw, 2.5rem);
  letter-spacing: 0.015em;
}

h2 {
  font-size: clamp(1.35rem, 1.1rem + 1.2vw, 1.95rem);
  position: relative;
  padding-bottom: 0.5em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  transition: width var(--transition);
}

section:hover > h2::after {
  width: 96px;
}

h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  color: var(--primary);
}

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

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

li {
  margin-bottom: 0.4em;
}

li::marker {
  color: var(--primary-light);
}

figure {
  margin: 1.8em 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

figure:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--shadow-lg);
}

figcaption {
  padding: 0.9em 1.2em;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  text-align: center;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), background var(--transition);
}

header:hover {
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem clamp(1rem, 4vw, 3rem);
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--gradient-soft);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.topbar span {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.topbar span:first-child::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 3px rgba(53, 132, 228, 0.18);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 132, 228, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(53, 132, 228, 0.06); }
}

nav[aria-label="主导航"] {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.6rem clamp(1rem, 4vw, 3rem);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

nav[aria-label="主导航"]::-webkit-scrollbar {
  display: none;
}

nav[aria-label="主导航"] a {
  flex: 0 0 auto;
  position: relative;
  padding: 0.55em 1em;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  transform: translateX(-50%);
  transition: width var(--transition);
}

nav[aria-label="主导航"] a:hover,
nav[aria-label="主导航"] a:focus-visible {
  color: var(--primary);
  background: var(--gradient-soft);
  transform: translateY(-1px);
}

nav[aria-label="主导航"] a:hover::after,
nav[aria-label="主导航"] a:focus-visible::after {
  width: 60%;
}

main {
  display: block;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.5rem) clamp(1rem, 4vw, 2.5rem) 3rem;
}

section {
  position: relative;
  margin: 0 0 clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 3vw, 2.4rem);
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s var(--ease) both;
}

section:hover {
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@supports (animation-timeline: view()) {
  section {
    animation: fadeUp linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 28%;
  }
}

#home {
  background: var(--gradient-banner);
  border: none;
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  isolation: isolate;
}

#home::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.22), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(229, 169, 238, 0.28), transparent 46%),
    radial-gradient(circle at 60% 10%, rgba(192, 217, 247, 0.18), transparent 40%);
  z-index: -1;
  pointer-events: none;
}

#home::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.14), transparent 70%);
  z-index: -1;
  animation: float 12s ease-in-out infinite;
  pointer-events: none;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-24px, 28px) scale(1.08); }
}

#home h1 {
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.25);
  max-width: 20em;
}

#home p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 62em;
}

#home figure {
  margin-top: 1.8em;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

#home figcaption {
  color: rgba(255, 255, 255, 0.86);
  background: rgba(255, 255, 255, 0.08);
  border-top-color: rgba(255, 255, 255, 0.16);
}

#home svg {
  display: block;
  width: 100%;
}

#about,
#products,
#solutions,
#cases,
#news,
#articles,
#knowledge,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  scroll-margin-top: 110px;
}

#about h2::after,
#products h2::after,
#solutions h2::after,
#cases h2::after,
#news h2::after,
#articles h2::after,
#knowledge h2::after,
#faq h2::after,
#howto h2::after,
#contact h2::after,
#sitemap h2::after,
#links h2::after,
#legal h2::after {
  background: var(--gradient-primary);
}

#solutions h2::after,
#links h2::after {
  background: var(--gradient-accent);
}

#products h3,
#solutions h3,
#cases h3,
#howto h3,
#legal h3 {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-top: 1.2em;
}

#products h3::before,
#solutions h3::before,
#cases h3::before,
#howto h3::before,
#legal h3::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--gradient-primary);
  transform: rotate(45deg);
  flex: 0 0 auto;
  transition: transform var(--transition);
}

#products h3:hover::before,
#solutions h3:hover::before,
#cases h3:hover::before,
#howto h3:hover::before,
#legal h3:hover::before {
  transform: rotate(135deg) scale(1.15);
}

#articles article {
  position: relative;
  margin: 0 0 1.2rem;
  padding: 1.3rem 1.5rem;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
  opacity: 0.85;
  transition: width var(--transition), opacity var(--transition);
}

#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
  background: var(--bg-card);
}

#articles article:hover::before {
  width: 7px;
  opacity: 1;
}

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

#articles article:hover h3 {
  color: var(--primary);
}

#articles article p {
  margin-bottom: 0.6em;
  font-size: 0.95rem;
}

#articles article p:first-of-type {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.2em 0.8em;
  margin-bottom: 0.9em;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--primary);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}

#articles article p:first-of-type::before {
  content: "🕒";
  font-size: 0.85em;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.45em 1.1em;
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--gradient-primary);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(26, 95, 180, 0.28);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

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

#articles article a:hover,
#articles article a:focus-visible {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(26, 95, 180, 0.4);
  filter: brightness(1.06);
}

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

#faq h3 {
  position: relative;
  margin: 1.4em 0 0.5em;
  padding: 0.9em 1em 0.9em 2.6em;
  font-size: 1.02rem;
  color: var(--text);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: default;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

#faq h3::before {
  content: "Q";
  position: absolute;
  left: 0.9em;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  font-size: 0.82em;
  font-weight: 700;
  color: #ffffff;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow: 0 3px 10px rgba(26, 95, 180, 0.3);
}

#faq h3:hover {
  background: var(--bg-card);
  border-color: var(--border-strong);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#faq p {
  position: relative;
  margin: 0 0 0.4em;
  padding: 0 1em 0.6em 2.6em;
  font-size: 0.95rem;
}

#faq p::before {
  content: "A";
  position: absolute;
  left: 1.15em;
  top: 0.15em;
  font-size: 0.82em;
  font-weight: 700;
  color: var(--accent);
}

#howto p {
  position: relative;
  padding-left: 1.6em;
}

#howto p::before {
  content: "";
  position: absolute;
  left: 0.2em;
  top: 0.75em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 3px rgba(53, 132, 228, 0.14);
}

#contact p {
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  margin-bottom: 0.7em;
  padding: 0.55em 1em;
  font-size: 0.96rem;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

#contact p:hover {
  transform: translateX(5px);
  border-color: var(--border-strong);
  background: var(--bg-card);
}

#contact p:first-child {
  font-weight: 700;
  color: var(--primary);
}

#contact p:last-child {
  background: var(--gradient-soft);
  border-color: var(--border-strong);
}

#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 0.5em 1.1em;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: transform var(--transition), color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#sitemap a:hover,
#sitemap a:focus-visible,
#links a:hover,
#links a:focus-visible {
  color: #ffffff;
  background: var(--gradient-primary);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(26, 95, 180, 0.32);
}

#links a:hover,
#links a:focus-visible {
  background: var(--gradient-accent);
  box-shadow: 0 8px 20px rgba(145, 65, 172, 0.32);
}

#legal {
  border-color: var(--border-strong);
}

footer {
  position: relative;
  margin-top: 2rem;
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 4vw, 3rem) 2rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.86);
  background: var(--gradient-banner);
  border-top: 1px solid var(--border);
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 255, 255, 0.14), transparent 45%),
    radial-gradient(circle at 88% 100%, rgba(229, 169, 238, 0.18), transparent 45%);
  pointer-events: none;
}

footer p {
  position: relative;
  margin: 0.4em auto;
  max-width: 60em;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.82);
}

footer p:first-child {
  font-size: 0.98rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.03em;
}

footer p:last-child {
  margin-top: 1em;
  padding-top: 1em;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

::selection {
  background: var(--primary-light);
  color: #ffffff;
}

:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  body {
    font-size: 15.5px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
    padding: 0.55rem 1rem;
  }

  nav[aria-label="主导航"] {
    padding: 0.5rem 1rem;
    gap: 0.1rem;
  }

  nav[aria-label="主导航"] a {
    padding: 0.45em 0.75em;
    font-size: 0.85rem;
  }

  main {
    padding: 1rem 1rem 2rem;
  }

  section {
    padding: 1.25rem 1.1rem;
    border-radius: var(--radius);
  }

  #home figure {
    margin-top: 1.2em;
  }

  #articles article {
    padding: 1.1rem 1.1rem 1.1rem 1.3rem;
  }

  #faq h3 {
    padding-left: 2.4em;
  }

  #faq p {
    padding-left: 2.4em;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.75;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.28rem;
  }

  h3 {
    font-size: 1.06rem;
  }

  .topbar {
    font-size: 0.76rem;
  }

  nav[aria-label="主导航"] {
    -webkit-overflow-scrolling: touch;
  }

  section {
    padding: 1.1rem 0.95rem;
    margin-bottom: 1.1rem;
    border-radius: var(--radius-sm);
  }

  #contact p {
    flex-direction: column;
    gap: 0.15em;
    font-size: 0.9rem;
  }

  #sitemap a,
  #links a {
    padding: 0.42em 0.9em;
    font-size: 0.84rem;
  }

  #articles article a {
    width: 100%;
    justify-content: center;
  }

  footer p {
    font-size: 0.8rem;
  }
}

@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 print {
  header,
  footer,
  #home::before,
  #home::after {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  section {
    box-shadow: none;
    border: 1px solid #cccccc;
    background: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    break-inside: avoid;
  }
}