:root {
  --brand-primary: #e94560;
  --brand-primary-dark: #c73650;
  --brand-primary-light: #ff6b81;
  --brand-secondary: #0f3460;
  --brand-accent: #533483;
  --bg-body: #f5f6fa;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f0f1f7;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.35);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-tertiary: #7a7a8c;
  --text-inverse: #ffffff;
  --border-color: #e2e4ed;
  --border-light: #eef0f6;
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 6px 24px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.12);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.24);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "JetBrains Mono", Consolas, monospace;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.56s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0d0d1a;
    --bg-surface: #16162a;
    --bg-surface-alt: #1c1c34;
    --bg-elevated: #1e1e38;
    --bg-glass: rgba(22, 22, 42, 0.78);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #ecedf5;
    --text-secondary: #b0b2c8;
    --text-tertiary: #7a7c96;
    --border-color: #2a2a48;
    --border-light: #222240;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.32);
  }
}

[data-theme="dark"] {
  --bg-body: #0d0d1a;
  --bg-surface: #16162a;
  --bg-surface-alt: #1c1c34;
  --bg-elevated: #1e1e38;
  --bg-glass: rgba(22, 22, 42, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text-primary: #ecedf5;
  --text-secondary: #b0b2c8;
  --text-tertiary: #7a7c96;
  --border-color: #2a2a48;
  --border-light: #222240;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.32);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
button {
  font-family: inherit;
}

::selection {
  background: var(--brand-primary);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-surface-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-surface-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-primary);
}

header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

header[role="banner"]:hover,
header[role="banner"].scrolled {
  box-shadow: var(--shadow-md);
}

header[role="banner"] > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

header[role="banner"] > div > a:first-child {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

header[role="banner"] > div > a:first-child:hover {
  transform: scale(1.04);
  color: var(--text-primary);
}

header[role="banner"] > div > a:first-child svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

header[role="banner"] > div > a:first-child:hover svg {
  box-shadow: var(--shadow-glow);
  transform: rotate(-4deg);
}

header[role="banner"] nav[role="navigation"] {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

header[role="banner"] nav[role="navigation"] ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

header[role="banner"] nav[role="navigation"] a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

header[role="banner"] nav[role="navigation"] a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--brand-primary);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

header[role="banner"] nav[role="navigation"] a:hover {
  color: var(--brand-primary);
  background: rgba(233, 69, 96, 0.08);
}

header[role="banner"] nav[role="navigation"] a:hover::after {
  width: 60%;
}

header[role="banner"] form[role="search"] {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

header[role="banner"] form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

header[role="banner"] form[role="search"] input[type="search"] {
  width: 200px;
  padding: 9px 16px;
  font-size: 0.875rem;
  color: var(--text-primary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  transition: width var(--transition-base), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

header[role="banner"] form[role="search"] input[type="search"]::placeholder {
  color: var(--text-tertiary);
}

header[role="banner"] form[role="search"] input[type="search"]:focus {
  width: 260px;
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.12);
  background: var(--bg-surface);
}

header[role="banner"] form[role="search"] button {
  padding: 9px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-inverse);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  white-space: nowrap;
}

header[role="banner"] form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  filter: brightness(1.08);
}

header[role="banner"] form[role="search"] button:active {
  transform: translateY(0);
}

header[role="banner"] > div > button {
  padding: 9px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

header[role="banner"] > div > button:hover {
  color: var(--brand-primary);
  background: rgba(233, 69, 96, 0.1);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
}

header[role="banner"] > div > button[aria-label="打开移动菜单"] {
  display: none;
}

nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

nav[aria-label="面包屑导航"] ol li {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: "/";
  color: var(--border-color);
  font-weight: 300;
}

nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

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

nav[aria-label="面包屑导航"] ol li[aria-current="page"] {
  color: var(--text-secondary);
  font-weight: 500;
}

main[role="main"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

main[role="main"] section {
  margin-bottom: 64px;
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

main[role="main"] section:nth-child(1) { animation-delay: 0.05s; }
main[role="main"] section:nth-child(2) { animation-delay: 0.1s; }
main[role="main"] section:nth-child(3) { animation-delay: 0.15s; }
main[role="main"] section:nth-child(4) { animation-delay: 0.2s; }
main[role="main"] section:nth-child(5) { animation-delay: 0.25s; }
main[role="main"] section:nth-child(6) { animation-delay: 0.3s; }
main[role="main"] section:nth-child(7) { animation-delay: 0.35s; }
main[role="main"] section:nth-child(8) { animation-delay: 0.4s; }
main[role="main"] section:nth-child(9) { animation-delay: 0.45s; }
main[role="main"] section:nth-child(10) { animation-delay: 0.5s; }
main[role="main"] section:nth-child(11) { animation-delay: 0.55s; }
main[role="main"] section:nth-child(12) { animation-delay: 0.6s; }

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

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

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

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

main[role="main"] h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 20px;
  position: relative;
  padding-left: 18px;
}

main[role="main"] h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 70%;
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-accent));
  border-radius: var(--radius-full);
}

main[role="main"] h3 {
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  margin: 32px 0 14px;
  letter-spacing: -0.01em;
}

main[role="main"] p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

#hero {
  position: relative;
  padding: 48px 40px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #533483 100%);
  background-size: 300% 300%;
  animation: gradientShift 14s ease infinite;
  color: var(--text-inverse);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 56px;
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.28) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.32) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: float 10s ease-in-out infinite reverse;
}

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

#hero h1 {
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  background: linear-gradient(120deg, #ffffff 0%, #ffd6de 40%, #e94560 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

#hero > p {
  font-size: clamp(0.95rem, 1.8vw, 1.08rem);
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.82);
  max-width: 860px;
  margin-bottom: 36px;
}

#hero > div[aria-label="品牌数据"] {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

#hero > div[aria-label="品牌数据"] > div {
  padding: 20px 16px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#hero > div[aria-label="品牌数据"] > div:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(233, 69, 96, 0.5);
  box-shadow: 0 12px 32px rgba(233, 69, 96, 0.24);
}

#hero > div[aria-label="品牌数据"] strong {
  display: block;
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--brand-primary-light);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

#hero > div[aria-label="品牌数据"] span {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.02em;
}

#hero > div[aria-label="Banner轮播"] {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

#hero > div[aria-label="Banner轮播"] article {
  grid-area: 1 / 1;
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

#hero > div[aria-label="Banner轮播"] article:first-of-type {
  opacity: 1;
  pointer-events: auto;
}

#hero > div[aria-label="Banner轮播"] article svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
}

#hero > div[aria-label="Banner轮播"] > button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  color: #fff;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

#hero > div[aria-label="Banner轮播"] > button::before {
  font-size: 1.1rem;
  line-height: 1;
}

#hero > div[aria-label="Banner轮播"] > button[aria-label="上一张"] {
  left: 16px;
}

#hero > div[aria-label="Banner轮播"] > button[aria-label="上一张"]::before {
  content: "‹";
}

#hero > div[aria-label="Banner轮播"] > button[aria-label="下一张"] {
  right: 16px;
}

#hero > div[aria-label="Banner轮播"] > button[aria-label="下一张"]::before {
  content: "›";
}

#hero > div[aria-label="Banner轮播"] > button:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  transform: translateY(-50%) scale(1.1);
}

#brand,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links {
  padding: 40px 36px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

#brand:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-color);
}

#products > p:first-of-type,
#solutions > p:first-of-type,
#cases > p:first-of-type,
#news > p:first-of-type,
#articles > p:first-of-type {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

#articles > article {
  padding: 28px 28px 24px;
  margin-bottom: 20px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

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

#articles > article:hover {
  transform: translateY(-4px) translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.3);
  background: var(--bg-surface);
}

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

#articles > article h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.2rem;
  transition: color var(--transition-fast);
}

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

#articles > article time {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-bottom: 14px;
  padding: 3px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
}

#articles > article p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-primary);
  padding: 6px 0;
  position: relative;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

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

#articles > article a:hover {
  gap: 10px;
  color: var(--brand-primary-dark);
}

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

#news > article {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
  transition: padding-left var(--transition-base), border-color var(--transition-base);
}

#news > article:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

#news > article:hover {
  padding-left: 12px;
}

#news > article h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.15rem;
  transition: color var(--transition-fast);
}

#news > article:hover h3 {
  color: var(--brand-primary);
}

#news > article time {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

#news > article p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 0;
}

#cases blockquote {
  position: relative;
  padding: 24px 28px 24px 56px;
  margin: 20px 0;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 10px;
  font-size: 3.2rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--brand-primary);
  opacity: 0.35;
}

#cases blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  background: var(--bg-surface);
}

#cases blockquote p {
  margin-bottom: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  font-style: italic;
}

#faq details {
  margin-bottom: 14px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.4);
  box-shadow: var(--shadow-sm);
  background: var(--bg-surface);
}

#faq details summary {
  position: relative;
  padding: 18px 52px 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq details summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--brand-primary);
  background: rgba(233, 69, 96, 0.1);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-fast), color var(--transition-fast);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--brand-primary);
  color: #fff;
}

#faq details summary:hover {
  color: var(--brand-primary);
  background: rgba(233, 69, 96, 0.04);
}

#faq details p {
  padding: 0 22px 20px;
  margin-bottom: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
  animation: fadeIn var(--transition-base) both;
}

#howto ol {
  counter-reset: step-counter;
  margin: 20px 0;
}

#howto ol li {
  position: relative;
  padding: 16px 20px 16px 64px;
  margin-bottom: 12px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
  counter-increment: step-counter;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

#howto ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
  transition: transform var(--transition-base);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(233, 69, 96, 0.3);
  background: var(--bg-surface);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
}

#howto h3 + p,
#howto h3 + ol {
  margin-top: 12px;
}

#contact address {
  font-style: normal;
  margin: 24px 0;
  padding: 28px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

#contact address:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(233, 69, 96, 0.25);
}

#contact address dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px 20px;
  align-items: baseline;
}

#contact address dt {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

#contact address dd {
  font-size: 0.95rem;
  color: var(--text-secondary);
  word-break: break-word;
}

#contact address dd a {
  font-weight: 500;
  border-bottom: 1px dashed transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

#contact address dd a:hover {
  border-bottom-color: var(--brand-primary);
}

#sitemap nav ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

#sitemap nav ul li a,
#links ul li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#sitemap nav ul li a::before,
#links ul li a::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-primary);
  flex-shrink: 0;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

#sitemap nav ul li a:hover,
#links ul li a:hover {
  transform: translateY(-3px);
  color: var(--brand-primary);
  background: var(--bg-surface);
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-sm);
}

#sitemap nav ul li a:hover::before,
#links ul li a:hover::before {
  transform: scale(1.6);
  background: var(--brand-primary-dark);
}

footer[role="contentinfo"] {
  background: linear-gradient(180deg, #1a1a2e 0%, #12121f 100%);
  color: rgba(255, 255, 255, 0.78);
  padding: 64px 24px 32px;
  margin-top: 32px;
  position: relative;
  overflow: hidden;
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent), var(--brand-secondary), var(--brand-primary));
  background-size: 300% 100%;
  animation: gradientShift 8s ease infinite;
}

footer[role="contentinfo"] > section {
  max-width: var(--max-width);
  margin: 0 auto 32px;
  animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

footer[role="contentinfo"] > section:nth-child(1) { animation-delay: 0.05s; }
footer[role="contentinfo"] > section:nth-child(2) { animation-delay: 0.1s; }
footer[role="contentinfo"] > section:nth-child(3) { animation-delay: 0.15s; }
footer[role="contentinfo"] > section:nth-child(4) { animation-delay: 0.2s; }
footer[role="contentinfo"] > section:nth-child(5) { animation-delay: 0.25s; }
footer[role="contentinfo"] > section:nth-child(6) { animation-delay: 0.3s; }

footer[role="contentinfo"] h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 0.01em;
  position: relative;
  padding-bottom: 10px;
}

footer[role="contentinfo"] h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--brand-primary);
  border-radius: var(--radius-full);
}

footer[role="contentinfo"] p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.62);
  margin-bottom: 8px;
}

footer[role="contentinfo"] a {
  color: var(--brand-primary-light);
  transition: color var(--transition-fast);
}

footer[role="contentinfo"] a:hover {
  color: #fff;
}

footer[role="contentinfo"] > p:last-child {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.42);
  letter-spacing: 0.04em;
}

footer[role="contentinfo"] > p:last-child small {
  font-size: inherit;
}

body > button[aria-label="返回顶部"] {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

body > button[aria-label="返回顶部"]::before {
  content: "↑";
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

body > button[aria-label="返回顶部"].visible,
body > button[aria-label="返回顶部"]:focus-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

body > button[aria-label="返回顶部"]:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 40px rgba(233, 69, 96, 0.45);
}

body > button[aria-label="返回顶部"]:active {
  transform: translateY(-2px) scale(1.02);
}

@media (max-width: 1024px) {
  header[role="banner"] > div {
    gap: 14px;
  }

  header[role="banner"] nav[role="navigation"] a {
    padding: 8px 10px;
    font-size: 0.84rem;
  }

  header[role="banner"] form[role="search"] input[type="search"] {
    width: 160px;
  }

  header[role="banner"] form[role="search"] input[type="search"]:focus {
    width: 200px;
  }

  #hero {
    padding: 40px 28px;
  }

  #hero > div[aria-label="品牌数据"] {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 64px;
  }

  header[role="banner"] > div {
    padding: 10px 16px;
    gap: 10px;
  }

  header[role="banner"] nav[role="navigation"] {
    order: 10;
    flex-basis: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

  header[role="banner"] nav[role="navigation"]::-webkit-scrollbar {
    display: none;
  }

  header[role="banner"] nav[role="navigation"] ul {
    flex-wrap: nowrap;
    gap: 2px;
  }

  header[role="banner"] nav[role="navigation"] a {
    white-space: nowrap;
  }

  header[role="banner"] form[role="search"] {
    flex: 1 1 auto;
  }

  header[role="banner"] form[role="search"] input[type="search"] {
    width: 100%;
    min-width: 0;
  }

  header[role="banner"] form[role="search"] input[type="search"]:focus {
    width: 100%;
  }

  header[role="banner"] > div > button[aria-label="切换暗黑模式"] {
    display: none;
  }

  header[role="banner"] > div > button[aria-label="打开移动菜单"] {
    display: inline-block;
  }

  main[role="main"] {
    padding: 24px 16px 48px;
  }

  main[role="main"] section {
    margin-bottom: 40px;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 28px 20px;
    border-radius: var(--radius-md);
  }

  #hero {
    padding: 32px 20px;
    border-radius: var(--radius-lg);
  }

  #hero > div[aria-label="Banner轮播"] > button {
    width: 36px;
    height: 36px;
  }

  #hero > div[aria-label="Banner轮播"] > button[aria-label="上一张"] {
    left: 8px;
  }

  #hero > div[aria-label="Banner轮播"] > button[aria-label="下一张"] {
    right: 8px;
  }

  #contact address dl {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }

  #contact address dt {
    margin-top: 12px;
  }

  #contact address dt:first-child {
    margin-top: 0;
  }

  #sitemap nav ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  footer[role="contentinfo"] {
    padding: 48px 16px 24px;
  }

  body > button[aria-label="返回顶部"] {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

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

  main[role="main"] h2 {
    padding-left: 14px;
    margin-bottom: 16px;
  }

  main[role="main"] h2::before {
    width: 4px;
  }

  main[role="main"] h3 {
    margin: 24px 0 10px;
  }

  #hero {
    padding: 28px 16px;
  }

  #hero h1 {
    margin-bottom: 16px;
  }

  #hero > p {
    margin-bottom: 24px;
  }

  #hero > div[aria-label="品牌数据"] {
    gap: 10px;
    margin-bottom: 28px;
  }

  #hero > div[aria-label="品牌数据"] > div {
    padding: 16px 10px;
  }

  #hero > div[aria-label="品牌数据"] strong {
    font-size: 1.4rem;
  }

  #hero > div[aria-label="品牌数据"] span {
    font-size: 0.75rem;
  }

  #articles > article {
    padding: 20px 18px;
  }

  #articles > article h3 {
    font-size: 1.08rem;
  }

  #cases blockquote {
    padding: 20px 20px 20px 44px;
  }

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

  #faq details summary {
    padding: 16px 46px 16px 18px;
    font-size: 0.95rem;
  }

  #faq details summary::after {
    right: 16px;
    width: 24px;
    height: 24px;
  }

  #faq details p {
    padding: 0 18px 18px;
    font-size: 0.9rem;
  }

  #howto ol li {
    padding: 14px 16px 14px 56px;
    font-size: 0.9rem;
  }

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

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

  #sitemap nav ul li a,
  #links ul li a {
    padding: 12px 16px;
    font-size: 0.88rem;
  }

  footer[role="contentinfo"] h2 {
    font-size: 1rem;
  }

  footer[role="contentinfo"] p {
    font-size: 0.84rem;
  }
}

@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[role="banner"],
  nav[aria-label="面包屑导航"],
  body > button[aria-label="返回顶部"],
  footer[role="contentinfo"]::before {
    display: none;
  }

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

  main[role="main"] section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}