:root {
  --brand-primary: #7C4DFF;
  --brand-primary-dark: #5E35B1;
  --brand-primary-light: #B39DDB;
  --brand-accent: #FFB74D;
  --brand-accent-soft: #FFF3E0;
  --brand-bg: #F4F1FB;
  --brand-bg-soft: #FAF8FE;
  --brand-surface: #FFFFFF;
  --brand-surface-glass: rgba(255, 255, 255, 0.65);
  --brand-text: #241C3B;
  --brand-text-soft: #5A5177;
  --brand-text-muted: #857CA0;
  --brand-border: rgba(124, 77, 255, 0.14);
  --brand-shadow-sm: 0 2px 8px rgba(94, 53, 177, 0.06);
  --brand-shadow-md: 0 8px 24px rgba(94, 53, 177, 0.10);
  --brand-shadow-lg: 0 16px 48px rgba(94, 53, 177, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --container-max: 1180px;
  --container-pad: clamp(16px, 4vw, 40px);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 68px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-bg: #14101F;
    --brand-bg-soft: #1A1528;
    --brand-surface: #1F1930;
    --brand-surface-glass: rgba(31, 25, 48, 0.62);
    --brand-text: #EDE9F7;
    --brand-text-soft: #B9B0D4;
    --brand-text-muted: #8B82A8;
    --brand-border: rgba(179, 157, 219, 0.18);
    --brand-primary-light: #9575CD;
    --brand-accent-soft: rgba(255, 183, 77, 0.12);
    --brand-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.30);
    --brand-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.40);
    --brand-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--brand-text);
  background-color: var(--brand-bg);
  background-image:
    radial-gradient(circle at 12% 0%, rgba(124, 77, 255, 0.10), transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(255, 183, 77, 0.10), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(179, 157, 219, 0.12), transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

@media (prefers-color-scheme: dark) {
  a:hover,
  a:focus-visible {
    color: var(--brand-primary-light);
  }
}

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

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

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.9rem);
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  margin: 0 0 1.25rem;
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  bottom: 0.28em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-accent));
}

h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  margin: 2rem 0 0.75rem;
}

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

strong {
  color: var(--brand-text);
  font-weight: 600;
}

ul, ol {
  margin: 0 0 1.25rem;
  padding-left: 1.4rem;
  color: var(--brand-text-soft);
}

li {
  margin-bottom: 0.5rem;
}

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

blockquote {
  margin: 0 0 1rem;
  padding: 1rem 1.25rem;
  background: var(--brand-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-left: 4px solid var(--brand-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--brand-text-soft);
  font-style: normal;
}

blockquote p {
  margin: 0;
}

time {
  color: var(--brand-text-muted);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

/* ============ 布局容器 ============ */
main {
  display: block;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad) 4rem;
}

main > section {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
  background: var(--brand-surface);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--brand-shadow-sm);
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

main > section:nth-child(even) {
  background: linear-gradient(160deg, var(--brand-surface), var(--brand-bg-soft));
}

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

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* ============ 头部导航 ============ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  max-width: 100%;
  padding: 0.75rem var(--container-pad);
  background: var(--brand-surface-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--brand-border);
  box-shadow: var(--brand-shadow-sm);
}

header > a:first-child {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--brand-text);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(124, 77, 255, 0.12), rgba(255, 183, 77, 0.12));
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

header > a:first-child::before {
  content: "";
  width: 26px;
  height: 26px;
  border-radius: 50% 50% 42% 42%;
  background: linear-gradient(160deg, var(--brand-primary), #9575CD);
  box-shadow: inset 0 -6px 0 rgba(255, 255, 255, 0.25);
}

header > a:first-child:hover {
  transform: translateY(-2px);
  box-shadow: var(--brand-shadow-md);
  color: var(--brand-primary);
}

header nav {
  flex: 1 1 auto;
}

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

header nav li {
  margin: 0;
}

header nav a {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--brand-text-soft);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast);
}

header nav a:hover,
header nav a:focus-visible {
  color: var(--brand-primary);
  background: rgba(124, 77, 255, 0.10);
  transform: translateY(-1px);
}

/* ============ 面包屑 ============ */
main > nav[aria-label="面包屑导航"] {
  margin: 1.5rem 0 1.25rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  color: var(--brand-text-muted);
}

main > nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--brand-text-muted);
  opacity: 0.6;
}

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

main > nav[aria-label="面包屑导航"] a:hover {
  color: var(--brand-primary);
}

main > nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--brand-primary);
  font-weight: 600;
}

/* ============ Hero 渐变 Banner ============ */
#hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 4vw, 3.5rem);
  background:
    linear-gradient(135deg, rgba(124, 77, 255, 0.94) 0%, rgba(149, 117, 205, 0.90) 45%, rgba(255, 183, 77, 0.85) 100%);
  background-size: 200% 200%;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both,
    shimmer 14s ease-in-out infinite;
  border: none;
  border-radius: var(--radius-xl);
  color: #fff;
  box-shadow: var(--brand-shadow-lg);
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.28), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(255, 255, 255, 0.18), transparent 40%);
  pointer-events: none;
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(60, 30, 120, 0.35);
  max-width: 22ch;
}

#hero p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 68ch;
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
}

#hero figure {
  margin: 2rem 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

#hero figure svg {
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(40, 20, 90, 0.35);
  animation: floatY 7s ease-in-out infinite;
  background: #F4F1FB;
}

#hero figcaption {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
}

/* ============ 卡片通用 ============ */
section article,
#news ul li,
#cases blockquote,
#products ul li,
#solutions h3 + p {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

section article {
  position: relative;
  margin-bottom: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--brand-surface);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  box-shadow: var(--brand-shadow-sm);
}

section article:hover {
  transform: translateY(-4px);
  box-shadow: var(--brand-shadow-md);
  border-color: rgba(124, 77, 255, 0.30);
}

section article h3 {
  margin-top: 0;
  color: var(--brand-text);
}

section article p:first-of-type {
  font-size: 0.8125rem;
  color: var(--brand-text-muted);
  margin-bottom: 0.6rem;
}

section article a {
  display: inline-block;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  background: rgba(124, 77, 255, 0.10);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

section article a:hover {
  background: var(--brand-primary);
  color: #fff;
  transform: translateX(3px);
}

/* ============ 新闻列表 ============ */
#news ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

#news li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  padding: 0.9rem 1.1rem;
  background: var(--brand-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--brand-text-soft);
}

#news li:hover {
  transform: translateX(4px);
  box-shadow: var(--brand-shadow-sm);
  border-color: rgba(124, 77, 255, 0.28);
}

#news time {
  flex: 0 0 auto;
  padding: 0.1rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(124, 77, 255, 0.10);
  color: var(--brand-primary);
  font-weight: 600;
  font-size: 0.8125rem;
}

/* ============ 案例 ============ */
#cases blockquote {
  border-left-width: 5px;
  background: linear-gradient(135deg, var(--brand-surface-glass), var(--brand-bg-soft));
}

#cases blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--brand-shadow-md);
}

/* ============ 教程流程 ============ */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 0.85rem 1rem 0.85rem 3.2rem;
  background: var(--brand-surface-glass);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.65rem;
  height: 1.65rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), #9575CD);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
}

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

#howto ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

#howto ul li {
  position: relative;
  padding-left: 1.6rem;
}

#howto ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
}

/* ============ FAQ ============ */
#faq h3 {
  padding: 0.85rem 1.1rem;
  margin: 0 0 0.5rem;
  font-size: 1rem;
  background: var(--brand-surface-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  color: var(--brand-primary);
  transition: background var(--transition-fast);
}

#faq h3:hover {
  background: rgba(124, 77, 255, 0.08);
}

#faq h3 + p {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--brand-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: var(--brand-surface);
  font-size: 0.95rem;
}

#faq h3 + p:hover {
  box-shadow: var(--brand-shadow-sm);
}

/* ============ 联系 ============ */
#contact address {
  font-style: normal;
  display: grid;
  gap: 0.6rem;
  padding: 1.25rem 1.5rem;
  background: var(--brand-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
}

#contact address p {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
}

#contact address a {
  font-weight: 600;
  word-break: break-all;
}

/* ============ 站点地图 / 友情链接 ============ */
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--brand-surface-glass);
  border: 1px solid var(--brand-border);
  transition: transform var(--transition-fast), background var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  background: var(--brand-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--brand-shadow-md);
}

/* ============ 版权声明 ============ */
#legal h3 {
  color: var(--brand-primary);
}

/* ============ 页脚 ============ */
footer {
  margin-top: 2rem;
  padding: 2.5rem var(--container-pad) 3rem;
  text-align: center;
  background: linear-gradient(160deg, rgba(124, 77, 255, 0.08), rgba(255, 183, 77, 0.06));
  border-top: 1px solid var(--brand-border);
}

footer p {
  margin: 0.35rem 0;
  font-size: 0.875rem;
  color: var(--brand-text-muted);
}

footer p:first-child {
  color: var(--brand-text-soft);
  font-weight: 600;
}

footer a {
  color: var(--brand-text-soft);
  padding: 0 0.15rem;
}

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

/* ============ 滚动动画（滚动驱动增强） ============ */
@supports (animation-timeline: view()) {
  main > section {
    animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
    animation-timeline: view();
    animation-range: entry 0% cover 28%;
  }

  section article,
  #news li,
  #cases blockquote,
  #howto ol li {
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
    animation-timeline: view();
    animation-range: entry 0% cover 32%;
  }
}

/* ============ 响应式：平板 ============ */
@media (max-width: 900px) {
  header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  header > a:first-child {
    align-self: flex-start;
  }

  header nav ul {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  header nav a {
    white-space: nowrap;
  }

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

/* ============ 响应式：手机 ============ */
@media (max-width: 600px) {
  :root {
    --header-h: 108px;
  }

  body {
    font-size: 15px;
    line-height: 1.7;
  }

  main {
    padding-bottom: 2.5rem;
  }

  main > section {
    padding: 1.25rem 1.1rem;
    margin-bottom: 1.75rem;
  }

  h2 {
    padding-left: 14px;
  }

  h2::before {
    width: 5px;
  }

  #hero {
    padding: 1.75rem 1.25rem;
    border-radius: var(--radius-lg);
  }

  #hero h1 {
    max-width: none;
  }

  section article {
    padding: 1rem 1.1rem;
  }

  #news li {
    display: block;
  }

  #news time {
    display: inline-block;
    margin-bottom: 0.35rem;
  }

  #contact address {
    padding: 1rem 1.1rem;
  }

  #contact address p {
    display: block;
  }

  #sitemap ul,
  #links ul {
    gap: 0.5rem;
  }

  #sitemap a,
  #links a {
    padding: 0.35rem 0.8rem;
    font-size: 0.85rem;
  }

  footer {
    padding: 2rem 1.1rem 2.5rem;
  }
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ============ 高对比度支持 ============ */
@media (prefers-contrast: more) {
  :root {
    --brand-border: rgba(94, 53, 177, 0.45);
    --brand-text-soft: #3D3459;
  }

  main > section {
    border-width: 2px;
  }
}

/* ============ 打印样式 ============ */
@media print {
  header,
  footer,
  #hero figure,
  #links,
  #sitemap {
    display: none;
  }

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

  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    animation: none;
  }

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