:root {
  --primary: #6C3CE9;
  --primary-light: #8B5CF6;
  --primary-dark: #4C1D95;
  --accent: #FFD166;
  --accent-light: #FFE29A;
  --accent-dark: #F0B429;
  --bg: #F8F7FC;
  --bg-alt: #FFFFFF;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(108, 60, 233, 0.12);
  --text: #1E1B2E;
  --text-secondary: #4A4560;
  --text-muted: #7A7490;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --shadow-sm: 0 2px 8px rgba(108, 60, 233, 0.08);
  --shadow-md: 0 8px 28px rgba(108, 60, 233, 0.12);
  --shadow-lg: 0 18px 48px rgba(108, 60, 233, 0.18);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 1180px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0D1A;
    --bg-alt: #16132A;
    --card-bg: rgba(30, 26, 54, 0.72);
    --card-border: rgba(139, 92, 246, 0.22);
    --text: #EDEAF7;
    --text-secondary: #B8B2D0;
    --text-muted: #8A84A8;
    --glass-bg: rgba(22, 19, 42, 0.6);
    --glass-border: rgba(139, 92, 246, 0.18);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.5);
    --accent: #FFD166;
    --primary-light: #A78BFA;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 8%, rgba(108, 60, 233, 0.14), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(255, 209, 102, 0.12), transparent 40%),
    radial-gradient(circle at 50% 92%, rgba(139, 92, 246, 0.1), transparent 45%);
  pointer-events: none;
}

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

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

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

ul,
ol {
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.5em;
}

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

#site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
  opacity: 0.85;
}

.brand-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-area svg {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(108, 60, 233, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}

.logo-area:hover svg {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 6px 22px rgba(108, 60, 233, 0.55);
}

.site-name {
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(120deg, var(--primary), var(--primary-light) 55%, var(--accent-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
}

nav[aria-label="主导航"] {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

nav[aria-label="主导航"] ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

nav[aria-label="主导航"] li {
  margin: 0;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 999px;
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(120deg, rgba(108, 60, 233, 0.12), rgba(255, 209, 102, 0.16));
  opacity: 0;
  transform: scale(0.85);
  transition: opacity var(--transition), transform var(--transition);
  z-index: -1;
}

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

nav[aria-label="主导航"] a:hover::before {
  opacity: 1;
  transform: scale(1);
}

/* ============ Main layout ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

section {
  padding: 56px 0;
  position: relative;
}

section + section {
  border-top: 1px solid var(--card-border);
}

section h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  letter-spacing: -0.3px;
}

section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

section h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.32rem);
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text);
  line-height: 1.4;
}

section h3:first-of-type {
  margin-top: 8px;
}

section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  max-width: 78ch;
}

section ul,
section ol {
  color: var(--text-secondary);
  margin-bottom: 16px;
  max-width: 78ch;
}

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

section ol li::marker {
  color: var(--primary);
  font-weight: 700;
}

/* ============ Hero ============ */
#hero {
  margin: 32px 0 8px;
  padding: clamp(40px, 6vw, 72px) clamp(24px, 5vw, 56px);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(108, 60, 233, 0.92) 0%, rgba(139, 92, 246, 0.88) 42%, rgba(255, 209, 102, 0.85) 100%);
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 12%, rgba(255, 255, 255, 0.35), transparent 45%),
    radial-gradient(circle at 10% 88%, rgba(255, 255, 255, 0.2), transparent 50%);
  z-index: -1;
  animation: heroGlow 14s ease-in-out infinite alternate;
}

#hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 255, 255, 0.35);
  z-index: -1;
  animation: spinSlow 40s linear infinite;
}

@keyframes heroGlow {
  0% { opacity: 0.75; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.08); }
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

#hero h1 {
  font-size: clamp(1.6rem, 4.2vw, 2.7rem);
  font-weight: 900;
  line-height: 1.28;
  color: #FFFFFF;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 18px rgba(76, 29, 149, 0.35);
}

#hero p {
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(0.95rem, 1.6vw, 1.06rem);
  line-height: 1.85;
  max-width: 72ch;
  margin-bottom: 14px;
  text-shadow: 0 1px 10px rgba(76, 29, 149, 0.25);
}

#hero p:last-child {
  margin-bottom: 0;
}

/* ============ Cards / glass panels ============ */
#brand,
#products,
#solutions,
#cases,
#news,
#articles,
#knowledge,
#faq,
#howto,
#contact,
#sitemap,
#links,
#privacy,
#disclaimer,
#copyright {
  position: relative;
}

#brand {
  margin-top: 8px;
}

/* blockquote */
blockquote {
  position: relative;
  margin: 18px 0;
  padding: 20px 24px 20px 56px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3.2rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--primary);
  opacity: 0.45;
}

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

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

/* ============ Articles ============ */
#articles {
  display: block;
}

#articles > p {
  margin-bottom: 28px;
}

#articles article {
  position: relative;
  padding: 24px 26px;
  margin-bottom: 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 60, 233, 0.35);
}

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

#articles article h3 {
  margin: 0 0 8px;
  font-size: 1.12rem;
}

#articles article h3 a {
  color: var(--text);
  font-weight: 700;
  transition: color var(--transition);
}

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

#articles article > p:nth-of-type(1) {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: inline-block;
  padding: 2px 12px;
  background: rgba(108, 60, 233, 0.08);
  border-radius: 999px;
}

#articles article > p:nth-of-type(2) {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.95rem;
}

#articles article > p:last-child {
  margin-bottom: 0;
}

#articles article > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(108, 60, 233, 0.08);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

#articles article > p:last-child a::after {
  content: "\2192";
  transition: transform var(--transition);
}

#articles article > p:last-child a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateX(2px);
}

#articles article > p:last-child a:hover::after {
  transform: translateX(4px);
}

/* ============ FAQ ============ */
#faq details {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  padding: 0;
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

#faq details:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 60, 233, 0.3);
}

#faq details[open] {
  border-color: rgba(108, 60, 233, 0.4);
  box-shadow: var(--shadow-md);
}

#faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 54px 18px 22px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  position: relative;
  transition: color var(--transition), background var(--transition);
  -webkit-user-select: none;
  user-select: none;
}

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

#faq summary::after {
  content: "";
  position: absolute;
  right: 22px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition);
}

#faq details[open] summary {
  color: var(--primary);
  background: rgba(108, 60, 233, 0.06);
}

#faq details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

#faq details p {
  padding: 4px 22px 20px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  animation: fadeSlideIn 0.4s ease both;
}

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

/* ============ HowTo ============ */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 16px 20px 16px 64px;
  margin-bottom: 12px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  box-shadow: 0 4px 12px rgba(108, 60, 233, 0.35);
}

#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ============ Contact ============ */
#contact ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  max-width: none;
}

#contact ul li {
  margin: 0;
  padding: 14px 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-size: 0.94rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact ul li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(108, 60, 233, 0.35);
}

/* ============ Sitemap & links ============ */
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: none;
}

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

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(108, 60, 233, 0.35);
}

/* ============ Footer ============ */
footer {
  margin-top: 24px;
  padding: 44px 24px 36px;
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(108, 60, 233, 0.06));
  border-top: 1px solid var(--card-border);
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: min(680px, 82%);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  border-radius: 2px;
}

footer p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 8px;
  line-height: 1.7;
}

footer p:first-child {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

footer p:last-child {
  margin-top: 16px;
  margin-bottom: 0;
  font-size: 0.82rem;
  opacity: 0.8;
}

/* ============ Scroll animation ============ */
@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section {
  animation: revealUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 32%;
}

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

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  :root {
    --header-height: 64px;
  }

  .brand-bar {
    padding: 0 18px;
  }

  nav[aria-label="主导航"] a {
    padding: 7px 11px;
    font-size: 0.86rem;
  }

  main {
    padding: 0 18px 32px;
  }

  section {
    padding: 44px 0;
  }
}

@media (max-width: 860px) {
  .brand-bar {
    flex-direction: column;
    height: auto;
    padding: 12px 16px;
    gap: 10px;
    align-items: flex-start;
  }

  .logo-area {
    width: 100%;
    justify-content: center;
  }

  nav[aria-label="主导航"] {
    width: 100%;
    justify-content: center;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

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

  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    gap: 2px;
  }

  nav[aria-label="主导航"] a {
    white-space: nowrap;
    padding: 7px 12px;
  }

  html {
    scroll-padding-top: 130px;
  }

  #hero {
    margin-top: 20px;
    border-radius: var(--radius-lg);
  }

  section h2 {
    padding-left: 16px;
  }

  section h2::before {
    width: 5px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.72;
  }

  main {
    padding: 0 14px 24px;
  }

  section {
    padding: 36px 0;
  }

  #hero {
    padding: 32px 20px;
    border-radius: var(--radius-md);
    margin-top: 14px;
  }

  #hero::after {
    width: 160px;
    height: 160px;
    top: -40px;
    right: -40px;
  }

  #hero h1 {
    font-size: 1.45rem;
  }

  #hero p {
    font-size: 0.92rem;
  }

  #articles article {
    padding: 20px 18px;
    border-radius: var(--radius-md);
  }

  blockquote {
    padding: 16px 18px 16px 46px;
  }

  blockquote::before {
    font-size: 2.4rem;
    left: 12px;
  }

  #faq summary {
    padding: 15px 46px 15px 18px;
    font-size: 0.94rem;
  }

  #faq summary::after {
    right: 18px;
  }

  #faq details p {
    padding: 2px 18px 16px;
    font-size: 0.9rem;
  }

  #howto ol li {
    padding: 14px 16px 14px 56px;
  }

  #howto ol li::before {
    left: 14px;
    width: 28px;
    height: 28px;
    font-size: 0.82rem;
  }

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

  footer {
    padding: 32px 16px 28px;
  }
}

/* ============ Accessibility & motion ============ */
@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;
  }

  section {
    opacity: 1;
    transform: none;
  }
}

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: rgba(108, 60, 233, 0.28);
  color: var(--text);
}

/* ============ Print ============ */
@media print {
  #site-header,
  #hero::after,
  footer::before {
    display: none;
  }

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

  body::before {
    display: none;
  }

  section {
    animation: none;
    opacity: 1;
    transform: none;
    page-break-inside: avoid;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}