:root {
  --primary: #ff6b9d;
  --primary-dark: #e8558a;
  --primary-light: #ffa8c5;
  --secondary: #7b68ee;
  --secondary-dark: #6a5acd;
  --accent: #ffb347;
  --accent-teal: #4ecdc4;
  --bg: #fdf7fa;
  --bg-alt: #f5eef3;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.5);
  --text: #2d2430;
  --text-secondary: #6b5f6e;
  --text-muted: #9a8d9e;
  --border: rgba(255, 107, 157, 0.15);
  --shadow-sm: 0 2px 8px rgba(255, 107, 157, 0.08);
  --shadow-md: 0 8px 24px rgba(255, 107, 157, 0.12);
  --shadow-lg: 0 16px 48px rgba(255, 107, 157, 0.16);
  --shadow-glass: 0 8px 32px rgba(123, 104, 238, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --gradient-hero: linear-gradient(135deg, #ff6b9d 0%, #c44dff 50%, #7b68ee 100%);
  --gradient-btn: linear-gradient(135deg, #ff6b9d 0%, #7b68ee 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 107, 157, 0.06) 0%, rgba(123, 104, 238, 0.06) 100%);
  --gradient-alt: linear-gradient(135deg, #fff0f5 0%, #f0ecff 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 72px;
  --max-width: 1200px;
}

[data-theme="dark"] {
  --bg: #1a1520;
  --bg-alt: #221a2a;
  --bg-card: #2a2135;
  --bg-glass: rgba(42, 33, 53, 0.78);
  --bg-glass-border: rgba(255, 107, 157, 0.2);
  --text: #f0eaf5;
  --text-secondary: #c4b8cc;
  --text-muted: #8a7d92;
  --border: rgba(255, 107, 157, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
  --gradient-alt: linear-gradient(135deg, #2a2135 0%, #221a2a 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 107, 157, 0.08) 0%, rgba(123, 104, 238, 0.08) 100%);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -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(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

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

input,
textarea {
  font-family: inherit;
  font-size: inherit;
}

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

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: var(--radius-full);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 10000;
  padding: 12px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: var(--gradient-alt);
}

.section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  letter-spacing: -0.02em;
}

.section-intro {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 720px;
  margin-bottom: 48px;
  line-height: 1.8;
}

.section h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.section h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 16px 0 8px;
}

.section p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.section ul {
  margin: 12px 0;
}

.section ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-btn);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  border: 2px solid transparent;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.2);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 107, 157, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 157, 0.45);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 157, 0.35);
}

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  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-color var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo-area a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-area svg {
  transition: transform var(--transition-base);
}

.logo-area a:hover svg {
  transform: rotate(15deg) scale(1.1);
}

.site-name {
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.02em;
}

#main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--primary);
  background: rgba(255, 107, 157, 0.08);
}

.nav-list a.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-btn);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-form {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border-radius: var(--radius-full);
  padding: 4px 4px 4px 16px;
  border: 1px solid var(--border);
  transition: all var(--transition-base);
}

.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.12);
}

.search-form input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text);
  width: 140px;
  font-size: 0.85rem;
}

.search-form input::placeholder {
  color: var(--text-muted);
}

.search-form button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.search-form button:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(255, 107, 157, 0.4);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  background: transparent;
}

.icon-btn:hover {
  background: rgba(255, 107, 157, 0.1);
  color: var(--primary);
  transform: scale(1.05);
}

.mobile-only {
  display: none;
}

.breadcrumb-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 20px) 24px 0;
}

.breadcrumb-nav ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb-nav li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-nav li:not(:last-child)::after {
  content: "/";
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
}

.breadcrumb-nav a:hover {
  color: var(--primary);
}

.hero-section {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px 100px;
  min-height: 80vh;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 157, 0.18) 0%, transparent 70%);
  pointer-events: none;
  animation: floatBlob 12s ease-in-out infinite;
}

.hero-section::after {
  content: "";
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 104, 238, 0.15) 0%, transparent 70%);
  pointer-events: none;
  animation: floatBlob 15s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.05);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.95);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 0.8s ease-out both;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 36px;
  max-width: 560px;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.stat-item {
  text-align: center;
  padding: 16px 8px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-visual {
  position: relative;
  z-index: 2;
  animation: fadeInRight 1s ease-out 0.2s both;
}

.hero-visual svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(255, 107, 157, 0.2));
  animation: floatVisual 6s ease-in-out infinite;
}

@keyframes floatVisual {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-16px);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-btn);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.about-card:hover::before {
  transform: scaleX(1);
}

.about-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--primary);
}

.team-info,
.author-info {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-glass);
}

.team-info {
  margin-bottom: 24px;
}

.author-info h4 {
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.author-info p:last-child {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.product-card::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 157, 0.08) 0%, transparent 70%);
  transition: transform var(--transition-slow);
}

.product-card:hover::after {
  transform: scale(1.8);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.product-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  margin-bottom: 20px;
  transition: transform var(--transition-base);
}

.product-card:hover .product-icon {
  transform: scale(1.1) rotate(-5deg);
}

.product-icon svg {
  width: 40px;
  height: 40px;
}

.product-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.product-card p {
  margin-bottom: 8px;
}

.product-card h4 {
  font-size: 0.95rem;
  color: var(--primary);
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.solutions-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.solution-item {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-glass);
}

.solution-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.solution-item h3 {
  color: var(--primary);
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.industry-apps {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.industry-apps h3 {
  margin-bottom: 20px;
  color: var(--primary);
}

.industry-apps ul li {
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.industry-apps ul li:last-child {
  border-bottom: none;
}

.industry-apps ul li strong {
  color: var(--text);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-base);
  position: relative;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.case-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 12px;
}

.testimonials {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-glass);
}

.testimonials h3 {
  margin-bottom: 24px;
  color: var(--primary);
}

.testimonials blockquote {
  position: relative;
  padding: 20px 24px 20px 48px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  transition: all var(--transition-base);
}

.testimonials blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

.testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  left: 16px;
  top: 8px;
  font-size: 2.5rem;
  color: var(--primary);
  opacity: 0.3;
  font-family: Georgia, serif;
  line-height: 1;
}

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

.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: all var(--transition-base);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: start;
}

.news-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.news-item time {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding-top: 4px;
}

.news-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.news-item h3 a {
  color: var(--text);
  transition: color var(--transition-fast);
}

.news-item h3 a:hover {
  color: var(--primary);
}

.news-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-btn);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.article-card:hover::before {
  transform: scaleX(1);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.article-card h3 {
  font-size: 1.05rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.article-card h3 a {
  color: var(--text);
  transition: color var(--transition-fast);
}

.article-card h3 a:hover {
  color: var(--primary);
}

.article-card time {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: block;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 16px;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.howto-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 900px;
}

.howto-content h3 {
  color: var(--primary);
  margin-top: 28px;
  margin-bottom: 12px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}

.howto-content h3:first-child {
  margin-top: 0;
}

.howto-content ol {
  counter-reset: step;
  margin: 16px 0;
}

.howto-content ol li {
  counter-increment: step;
  position: relative;
  padding: 12px 0 12px 48px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-bottom: 1px solid var(--border);
}

.howto-content ol li:last-child {
  border-bottom: none;
}

.howto-content ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 12px;
  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;
}

.howto-content ol li strong {
  color: var(--text);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-item[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
  transition: color var(--transition-fast);
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 107, 157, 0.1);
  color: var(--primary);
  font-size: 1.25rem;
  font-weight: 400;
  transition: all var(--transition-base);
}

.faq-item[open] summary::after {
  content: "−";
  background: var(--gradient-btn);
  color: #fff;
  transform: rotate(180deg);
}

.faq-item summary:hover {
  color: var(--primary);
}

.faq-item p {
  padding: 0 24px 24px;
  color: var(--text-secondary);
  line-height: 1.8;
  animation: fadeIn 0.3s ease-out;
}

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.contact-info h3 {
  color: var(--primary);
  margin-bottom: 20px;
}

.contact-info address {
  font-style: normal;
}

.contact-info address p {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-info address p:last-child {
  border-bottom: none;
}

.contact-info address strong {
  color: var(--text);
  display: inline-block;
  min-width: 90px;
}

.contact-info address a {
  color: var(--primary);
}

.contact-info address a:hover {
  text-decoration: underline;
}

.contact-form-wrapper {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-glass);
}

.contact-form-wrapper h3 {
  color: var(--primary);
  margin-bottom: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: -8px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text);
  outline: none;
  transition: all var(--transition-fast);
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.12);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-muted);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: 8px;
}

.service-promise,
.security-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 20px;
  border-left: 4px solid var(--primary);
}

.service-promise h3,
.security-info h3 {
  color: var(--primary);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.sitemap-grid h3 {
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}

.sitemap-grid ul li {
  padding: 6px 0;
}

.sitemap-grid ul li::before {
  display: none;
}

.sitemap-grid ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sitemap-grid ul li a::before {
  content: "›";
  color: var(--primary);
  font-weight: 700;
  transition: transform var(--transition-fast);
}

.sitemap-grid ul li a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.legal-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.legal-content article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
}

.legal-content article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.legal-content h3 {
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.legal-content p {
  font-size: 0.9rem;
  line-height: 1.8;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 107, 157, 0.4);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 28px rgba(255, 107, 157, 0.55);
}

#back-to-top svg {
  width: 22px;
  height: 22px;
}

#site-footer {
  background: linear-gradient(135deg, #2d2430 0%, #3d2a45 50%, #2a1f35 100%);
  color: #e0d5e8;
  padding: 60px 0 32px;
  margin-top: 0;
}

[data-theme="dark"] #site-footer {
  background: linear-gradient(135deg, #120e18 0%, #1a1220 50%, #0f0a14 100%);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.footer-brand svg {
  transition: transform var(--transition-base);
}

.footer-brand:hover svg {
  transform: rotate(15deg) scale(1.1);
}

.footer-desc {
  color: rgba(224, 213, 232, 0.7);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 28px;
}

.footer-nav a {
  color: rgba(224, 213, 232, 0.8);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
  position: relative;
}

.footer-nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

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

.footer-nav a:hover::after {
  width: 100%;
}

.footer-contact {
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: rgba(224, 213, 232, 0.65);
  line-height: 1.8;
}

.footer-copyright {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: rgba(224, 213, 232, 0.5);
  line-height: 1.8;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 60px 24px 80px;
    min-height: auto;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-visual {
    max-width: 500px;
    margin: 0 auto;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .cases-grid {
    grid-template-columns: 1fr;
  }

  .legal-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .mobile-only {
    display: flex;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--bg-glass-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-base);
    padding: 0 24px;
    box-shadow: var(--shadow-lg);
  }

  #main-nav.open {
    max-height: 80vh;
    overflow-y: auto;
    padding: 16px 24px 24px;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-list a {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 1rem;
  }

  .nav-list a.active::after {
    display: none;
  }

  .search-form {
    display: none;
  }

  .about-grid,
  .products-grid,
  .solutions-list,
  .contact-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 600px) {
  :root {
    --header-height: 64px;
  }

  .section {
    padding: 56px 0;
  }

  .section h2 {
    font-size: 1.5rem;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .hero-section {
    padding: 40px 16px 60px;
  }

  .hero-content h1 {
    font-size: 1.6rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-stats {
    gap: 10px;
  }

  .stat-number {
    font-size: 1.2rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .about-card,
  .product-card,
  .solution-item,
  .case-card,
  .article-card,
  .contact-info,
  .contact-form-wrapper,
  .howto-content,
  .testimonials,
  .industry-apps,
  .team-info,
  .author-info {
    padding: 24px 20px;
  }

  .howto-content ol li {
    padding-left: 40px;
  }

  .howto-content ol li::before {
    width: 26px;
    height: 26px;
    font-size: 0.75rem;
  }

  .faq-item summary {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .faq-item p {
    padding: 0 18px 18px;
    font-size: 0.9rem;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  .breadcrumb-nav {
    padding: calc(var(--header-height) + 12px) 16px 0;
  }

  .breadcrumb-nav ol {
    font-size: 0.78rem;
  }

  .footer-nav {
    gap: 6px 16px;
  }

  .footer-nav a {
    font-size: 0.82rem;
  }

  .footer-contact {
    font-size: 0.8rem;
  }

  .footer-copyright {
    font-size: 0.72rem;
  }
}

@media (max-width: 380px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-item {
    padding: 12px 4px;
  }

  .stat-number {
    font-size: 1.05rem;
  }
}

@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,
  #back-to-top,
  .hero-visual,
  .skip-link {
    display: none;
  }

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

  .section {
    padding: 20px 0;
    break-inside: avoid;
  }
}