:root {
  --brand-primary: #FF6B35;
  --brand-secondary: #FFB347;
  --brand-accent: #FF3D71;
  --brand-deep: #2D1B4E;
  --brand-purple: #6C3CE9;
  --brand-teal: #00C9A7;
  --gradient-hero: linear-gradient(135deg, #FF6B35 0%, #FF3D71 45%, #6C3CE9 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 107, 53, 0.08) 0%, rgba(108, 60, 233, 0.08) 100%);
  --gradient-btn: linear-gradient(135deg, #FF6B35, #FF3D71);
  --gradient-btn-hover: linear-gradient(135deg, #FF3D71, #6C3CE9);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.08));
  --bg-body: #FDF8F3;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #FFF5EE;
  --bg-elevated: #FFFFFF;
  --text-primary: #1A1225;
  --text-secondary: #5C4D6E;
  --text-muted: #9B8DA8;
  --text-inverse: #FFFFFF;
  --border-color: rgba(108, 60, 233, 0.12);
  --border-glass: rgba(255, 255, 255, 0.35);
  --shadow-sm: 0 2px 8px rgba(45, 27, 78, 0.06);
  --shadow-md: 0 8px 24px rgba(45, 27, 78, 0.10);
  --shadow-lg: 0 16px 48px rgba(45, 27, 78, 0.14);
  --shadow-glow: 0 8px 32px rgba(255, 107, 53, 0.28);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 100px;
  --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-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --max-width: 1200px;
  --header-height: 68px;
}

[data-theme="dark"] {
  --bg-body: #0F0A1A;
  --bg-surface: #1A1228;
  --bg-surface-alt: #221933;
  --bg-elevated: #2A1F3D;
  --text-primary: #F5F0FF;
  --text-secondary: #C4B5D9;
  --text-muted: #8B7BA3;
  --border-color: rgba(108, 60, 233, 0.22);
  --border-glass: rgba(255, 255, 255, 0.12);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 8px 32px rgba(255, 107, 53, 0.35);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -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);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(255, 107, 53, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(108, 60, 233, 0.06), transparent);
  background-attachment: fixed;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(255, 107, 53, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(108, 60, 233, 0.10), transparent);
}

img, svg, video {
  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-accent);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
h4 { font-size: clamp(1.05rem, 2vw, 1.25rem); }

p {
  margin-bottom: 1em;
  color: var(--text-secondary);
}

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

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

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(253, 248, 243, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

[data-theme="dark"] #site-header {
  background: rgba(15, 10, 26, 0.72);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(253, 248, 243, 0.92);
}

[data-theme="dark"] #site-header.scrolled {
  background: rgba(15, 10, 26, 0.92);
}

#site-header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
}

#site-header nav > a:first-child {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: -0.02em;
  position: relative;
}

#site-header nav > a:first-child::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-btn);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

#site-header nav > a:first-child:hover::after {
  transform: scaleX(1);
}

#site-header nav > ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

#site-header nav > ul li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

#site-header nav > ul li a:hover {
  color: var(--brand-primary);
  background: rgba(255, 107, 53, 0.1);
  transform: translateY(-1px);
}

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  position: relative;
}

#site-header 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;
}

#site-header form[role="search"] input {
  width: 180px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill) 0 0 var(--radius-pill);
  outline: none;
  transition: width var(--transition-smooth), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

#site-header form[role="search"] input::placeholder {
  color: var(--text-muted);
}

#site-header form[role="search"] input:focus {
  width: 220px;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
  background: var(--bg-surface);
}

#site-header form[role="search"] button {
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--gradient-btn);
  border: none;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

#site-header form[role="search"] button:hover {
  opacity: 0.9;
  transform: translateX(1px);
}

#site-header form[role="search"] button:active {
  transform: scale(0.97);
}

#theme-toggle, #menu-toggle {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

#theme-toggle:hover, #menu-toggle:hover {
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  background: rgba(255, 107, 53, 0.08);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

#theme-toggle:active, #menu-toggle:active {
  transform: scale(0.95);
}

#menu-toggle {
  display: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

main > nav[aria-label="面包屑导航"] {
  padding: 20px 0 8px;
}

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

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

main > nav[aria-label="面包屑导航"] ol li + li::before {
  content: '/';
  color: var(--text-muted);
  opacity: 0.5;
}

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

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

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

section {
  margin-top: 72px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

section > h2 {
  position: relative;
  padding-bottom: 16px;
  margin-bottom: 28px;
}

section > h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 4px;
  background: var(--gradient-btn);
  border-radius: 4px;
}

section > h3 {
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--text-primary);
}

section > h3::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 1em;
  background: var(--gradient-btn);
  border-radius: 3px;
  margin-right: 10px;
  vertical-align: -2px;
}

section > h4 {
  margin-top: 24px;
  margin-bottom: 10px;
  color: var(--brand-primary);
}

section > p {
  margin-bottom: 14px;
}

#hero {
  position: relative;
  margin-top: 32px;
  padding: 56px 48px;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

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

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.18), transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.12), transparent 50%);
  z-index: -1;
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
  animation: floatOrb 8s ease-in-out infinite;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 30px) scale(1.1); }
}

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
  margin-bottom: 20px;
}

#hero > p {
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.05rem;
  max-width: 760px;
  margin-bottom: 16px;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.1);
}

#hero > ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 36px;
}

#hero > ul li a {
  display: inline-block;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

#hero > ul li a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
}

#hero > ul li a:active {
  transform: translateY(-1px) scale(0.98);
}

#banner-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

#banner-carousel article {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  background: var(--gradient-glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--border-glass);
  transition: transform var(--transition-bounce), box-shadow var(--transition-smooth), background var(--transition-smooth);
  cursor: default;
  position: relative;
  overflow: hidden;
}

#banner-carousel article::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: left 0.6s ease;
}

#banner-carousel article:hover::before {
  left: 100%;
}

#banner-carousel article:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
  background: rgba(255, 255, 255, 0.22);
}

#banner-carousel article h3 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 8px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.12);
}

#banner-carousel article p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0;
}

#hero > dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  margin-top: 8px;
}

#hero > dl > div {
  padding: 20px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  transition: transform var(--transition-bounce), background var(--transition-smooth);
}

#hero > dl > div:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.2);
}

#hero > dl dt {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 6px;
  font-weight: 500;
}

#hero > dl dd {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

#hero > dl dd span[data-counter] {
  display: inline;
}

#about, #products, #solutions, #cases, #news, #knowledge, #howto, #faq, #contact, #sitemap, #links, #legal, #meta-info {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth), background var(--transition-smooth);
}

#about:hover, #products:hover, #solutions:hover, #cases:hover, #news:hover, #knowledge:hover, #howto:hover, #faq:hover, #contact:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.2);
}

#products h4 {
  padding: 16px 20px;
  margin-top: 20px;
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  background: var(--gradient-card);
  border-left: 4px solid var(--brand-primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#products h4:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#solutions h3, #cases h3, #knowledge h3, #howto h3 {
  padding-bottom: 8px;
  border-bottom: 2px dashed var(--border-color);
}

#cases blockquote {
  position: relative;
  margin: 24px 0;
  padding: 24px 28px 24px 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#cases blockquote::before {
  content: '\201C';
  position: absolute;
  top: 8px;
  left: 18px;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--brand-primary);
  opacity: 0.35;
  font-family: Georgia, serif;
}

#cases blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

#cases blockquote p {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 10px;
  font-style: italic;
}

#cases blockquote footer {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}

#news > p {
  margin-bottom: 28px;
  color: var(--text-secondary);
}

#news article {
  position: relative;
  padding: 24px 26px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth), background var(--transition-smooth);
  overflow: hidden;
}

#news article::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-btn);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-smooth);
}

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

#news article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.25);
  background: var(--bg-surface);
}

#news article h3 {
  margin-bottom: 8px;
}

#news article h3 a {
  color: var(--text-primary);
  font-size: 1.15rem;
  font-weight: 700;
  transition: color var(--transition-fast);
}

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

#news article time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding: 2px 12px;
  border-radius: var(--radius-pill);
  background: rgba(108, 60, 233, 0.08);
}

#news article > p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

#news article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

#news article > a:last-child::after {
  content: '\2192';
  transition: transform var(--transition-fast);
}

#news article > a:last-child:hover {
  gap: 10px;
  color: var(--brand-accent);
}

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

#howto ol {
  counter-reset: howto-step;
  margin: 20px 0;
  display: grid;
  gap: 12px;
}

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

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(255, 107, 53, 0.25);
}

#howto ul {
  margin: 16px 0;
  display: grid;
  gap: 10px;
}

#howto ul li {
  position: relative;
  padding: 10px 16px 10px 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-alt);
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#howto ul li::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-btn);
  box-shadow: 0 0 8px rgba(255, 107, 53, 0.4);
}

#howto ul li:hover {
  background: rgba(255, 107, 53, 0.06);
  transform: translateX(4px);
}

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#faq details[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.25);
}

#faq details:hover {
  border-color: rgba(255, 107, 53, 0.2);
}

#faq summary {
  position: relative;
  padding: 18px 56px 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.1);
  color: var(--brand-primary);
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform var(--transition-smooth), background var(--transition-fast), color var(--transition-fast);
}

#faq details[open] summary::after {
  content: '\2212';
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-btn);
  color: #fff;
}

#faq summary:hover {
  background: rgba(255, 107, 53, 0.05);
  color: var(--brand-primary);
}

#faq details p {
  padding: 0 22px 20px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-secondary);
  animation: fadeSlideIn 0.35s ease;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#contact dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

#contact dl > div {
  display: contents;
}

#contact dt {
  font-weight: 700;
  color: var(--text-primary);
  padding: 12px 16px;
  background: var(--bg-surface-alt);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border: 1px solid var(--border-color);
  border-right: none;
  font-size: 0.9rem;
}

#contact dd {
  padding: 12px 16px;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  transition: background var(--transition-fast);
}

#contact dd:hover {
  background: rgba(255, 107, 53, 0.04);
}

#contact dd a {
  color: var(--brand-primary);
  font-weight: 500;
}

#sitemap ul, #links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

#sitemap ul li a, #links ul li a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

#sitemap ul li a:hover, #links ul li a:hover {
  color: var(--brand-primary);
  background: rgba(255, 107, 53, 0.08);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#legal h3 {
  color: var(--brand-primary);
}

#meta-info dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

#meta-info dt {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

#meta-info dd {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  padding: 12px 16px;
  background: var(--bg-surface-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

footer {
  margin-top: 80px;
  padding: 48px 24px 32px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  text-align: center;
  transition: background var(--transition-smooth), border-color var(--transition-smooth);
}

footer nav[aria-label="页脚导航"] ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 24px;
}

footer nav[aria-label="页脚导航"] ul li a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-fast);
}

footer nav[aria-label="页脚导航"] ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-btn);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-smooth);
}

footer nav[aria-label="页脚导航"] ul li a:hover {
  color: var(--brand-primary);
}

footer nav[aria-label="页脚导航"] ul li a:hover::after {
  width: 100%;
}

footer > p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.7;
}

footer > p:last-child {
  margin-top: 16px;
}

footer > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

footer > p:last-child a::before {
  content: '\2191';
  transition: transform var(--transition-fast);
}

footer > p:last-child a:hover {
  color: #fff;
  background: var(--gradient-btn);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

footer > p:last-child a:hover::before {
  transform: translateY(-3px);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

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

#hero > * {
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

#hero > h1 { animation-delay: 0.05s; }
#hero > p:nth-of-type(1) { animation-delay: 0.15s; }
#hero > p:nth-of-type(2) { animation-delay: 0.25s; }
#banner-carousel { animation-delay: 0.35s; }
#hero > ul { animation-delay: 0.45s; }
#hero > dl { animation-delay: 0.55s; }

@media (max-width: 1024px) {
  #site-header nav {
    gap: 16px;
    padding: 0 16px;
  }

  #site-header form[role="search"] input {
    width: 140px;
  }

  #site-header form[role="search"] input:focus {
    width: 170px;
  }

  #hero {
    padding: 44px 32px;
  }
}

@media (max-width: 820px) {
  #site-header nav > ul {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px;
    background: rgba(253, 248, 243, 0.96);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    animation: fadeSlideIn 0.3s ease;
  }

  [data-theme="dark"] #site-header nav > ul {
    background: rgba(15, 10, 26, 0.96);
  }

  #site-header nav > ul.open {
    display: flex;
  }

  #site-header nav > ul li a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  #menu-toggle {
    display: block;
  }

  #site-header form[role="search"] {
    display: none;
  }

  #hero {
    padding: 36px 24px;
    border-radius: var(--radius-lg);
  }

  #banner-carousel {
    grid-template-columns: 1fr 1fr;
  }

  #hero > dl {
    grid-template-columns: repeat(2, 1fr);
  }

  #about, #products, #solutions, #cases, #news, #knowledge, #howto, #faq, #contact, #sitemap, #links, #legal, #meta-info {
    padding: 28px 22px;
    border-radius: var(--radius-md);
  }

  section {
    margin-top: 48px;
  }

  #contact dt {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    border-right: 1px solid var(--border-color);
    border-bottom: none;
  }

  #contact dd {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  }
}

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

  main {
    padding: 0 14px 56px;
  }

  #site-header nav {
    padding: 0 12px;
    gap: 10px;
  }

  #site-header nav > a:first-child {
    font-size: 1.1rem;
  }

  #theme-toggle, #menu-toggle {
    padding: 7px 12px;
    font-size: 0.78rem;
  }

  #hero {
    padding: 28px 18px;
    border-radius: var(--radius-md);
    margin-top: 20px;
  }

  #hero h1 {
    font-size: 1.5rem;
  }

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

  #banner-carousel {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #banner-carousel article {
    padding: 18px 16px;
  }

  #hero > ul {
    flex-direction: column;
    gap: 10px;
  }

  #hero > ul li a {
    display: block;
    text-align: center;
    padding: 12px 20px;
  }

  #hero > dl {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  #hero > dl > div {
    padding: 14px 10px;
  }

  #hero > dl dd {
    font-size: 1.35rem;
  }

  #about, #products, #solutions, #cases, #news, #knowledge, #howto, #faq, #contact, #sitemap, #links, #legal, #meta-info {
    padding: 22px 16px;
    border-radius: var(--radius-md);
  }

  section {
    margin-top: 36px;
  }

  section > h2 {
    font-size: 1.35rem;
  }

  #news article {
    padding: 18px 16px;
  }

  #faq summary {
    padding: 14px 48px 14px 16px;
    font-size: 0.92rem;
  }

  #faq summary::after {
    right: 14px;
    width: 24px;
    height: 24px;
    font-size: 1rem;
  }

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }

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

  #howto ol li::before {
    left: 12px;
    width: 28px;
    height: 28px;
    font-size: 0.78rem;
  }

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

  #meta-info dl {
    grid-template-columns: 1fr;
  }

  footer {
    padding: 36px 16px 24px;
  }

  footer nav[aria-label="页脚导航"] ul {
    gap: 6px 16px;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  #site-header, footer, #theme-toggle, #menu-toggle, #banner-carousel {
    display: none;
  }

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

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

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

@supports (scrollbar-color: auto) {
  * {
    scrollbar-width: thin;
    scrollbar-color: var(--brand-primary) transparent;
  }
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-accent));
  border-radius: 10px;
  border: 2px solid var(--bg-surface-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-purple));
}