:root {
  --primary: #e94560;
  --primary-dark: #c73650;
  --primary-light: #ff6b81;
  --secondary: #533483;
  --accent: #0f3460;
  --bg-body: #f5f7fb;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.45);
  --bg-header: rgba(255, 255, 255, 0.82);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --text-muted: #7a7a95;
  --text-inverse: #ffffff;
  --border-color: rgba(26, 26, 46, 0.1);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
  --shadow-glow: 0 0 32px rgba(233, 69, 96, 0.35);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
}

[data-theme="dark"] {
  --primary: #ff6b81;
  --primary-dark: #e94560;
  --primary-light: #ff8fa3;
  --secondary: #7b5ea7;
  --accent: #1a3a6e;
  --bg-body: #0d0d1a;
  --bg-card: #16162a;
  --bg-elevated: #1e1e38;
  --bg-glass: rgba(22, 22, 42, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --bg-header: rgba(13, 13, 26, 0.85);
  --text-primary: #eaeaf5;
  --text-secondary: #b0b0cc;
  --text-muted: #7878a0;
  --text-inverse: #0d0d1a;
  --border-color: rgba(255, 255, 255, 0.08);
  --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-glow: 0 0 32px rgba(255, 107, 129, 0.3);
}

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

html {
  scroll-behavior: smooth;
  -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);
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 5px;
  border: 2px solid var(--bg-body);
}

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: background 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: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-area a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-area a:hover {
  color: var(--primary);
}

.logo-area svg {
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.logo-area a:hover svg {
  transform: rotate(-10deg) scale(1.08);
}

.site-name {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#main-nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
}

#main-nav a:hover::after {
  width: 60%;
}

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

#site-search {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: 999px;
  padding: 4px 4px 4px 16px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

#site-search input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.88rem;
  width: 160px;
  padding: 6px 0;
}

#site-search input::placeholder {
  color: var(--text-muted);
}

#site-search button {
  padding: 7px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

#site-search button:hover {
  transform: scale(1.04);
  box-shadow: var(--shadow-glow);
  filter: brightness(1.08);
}

#dark-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform var(--transition-fast), background var(--transition-fast),
    border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#dark-toggle:hover,
#menu-toggle:hover {
  transform: translateY(-2px) rotate(8deg);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

#menu-toggle {
  display: none;
}

#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

#breadcrumb li:not(:last-child)::after {
  content: "›";
  margin-left: 8px;
  color: var(--text-muted);
  opacity: 0.6;
}

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

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

#breadcrumb [aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

main > section {
  margin-top: 64px;
  scroll-margin-top: 90px;
}

main > section > h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  letter-spacing: -0.02em;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 5px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  box-shadow: 0 0 16px rgba(233, 69, 96, 0.4);
}

main > section > h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  margin: 32px 0 12px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

main p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.97rem;
}

main ul:not([class]) {
  margin: 12px 0 20px;
  display: grid;
  gap: 8px;
}

main ul:not([class]) li {
  position: relative;
  padding-left: 26px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

main ul:not([class]) li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 8px rgba(233, 69, 96, 0.5);
}

#hero {
  margin-top: 24px !important;
}

.hero-banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--accent);
}

.banner-slide {
  display: none;
  animation: bannerFade 0.7s ease both;
}

.banner-slide.active {
  display: block;
}

.banner-slide svg {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes bannerFade {
  from {
    opacity: 0;
    transform: scale(1.04);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.banner-prev,
.banner-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  font-size: 1.6rem;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
  z-index: 3;
}

.banner-prev {
  left: 16px;
}

.banner-next {
  right: 16px;
}

.banner-prev:hover,
.banner-next:hover {
  background: var(--primary);
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-glow);
}

.banner-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: width var(--transition-base), background var(--transition-base),
    box-shadow var(--transition-base);
}

.banner-dots button[aria-selected="true"] {
  width: 30px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  box-shadow: 0 0 12px rgba(233, 69, 96, 0.6);
}

.hero-content {
  margin-top: 32px;
  padding: 40px;
  border-radius: var(--radius-lg);
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--bg-glass-border);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.hero-content h1 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 20%, var(--primary) 60%, var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  max-width: 780px;
  margin: 0 auto 28px;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-item {
  padding: 20px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
}

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

.stat-number {
  display: block;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cta-button {
  display: inline-block;
  padding: 14px 42px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff !important;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  background-size: 200% 200%;
  box-shadow: 0 8px 28px rgba(233, 69, 96, 0.35);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    background-position var(--transition-slow);
}

.cta-button:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 40px rgba(233, 69, 96, 0.5);
  background-position: 100% 50%;
  color: #fff !important;
}

#about,
#products,
#solutions,
#cases,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base),
    background var(--transition-base);
}

#about:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover,
#legal:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.25);
}

#articles article {
  padding: 22px 24px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
}

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

#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.3);
}

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

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

#articles article h3 {
  margin: 0 0 6px;
  font-size: 1.08rem;
  font-weight: 700;
}

#articles article h3 a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

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

#articles article time {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(233, 69, 96, 0.08);
  border: 1px solid rgba(233, 69, 96, 0.15);
}

#articles article p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

#articles article > a {
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

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

#articles article > a:hover {
  gap: 8px;
}

#articles article > a:hover::after {
  transform: translateX(3px);
}

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

#faq details:last-child {
  margin-bottom: 0;
}

#faq details[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.3);
}

#faq summary {
  padding: 16px 22px;
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--primary);
  background: rgba(233, 69, 96, 0.1);
  transition: transform var(--transition-base), background var(--transition-base),
    color var(--transition-base);
}

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

#faq summary:hover {
  background: rgba(233, 69, 96, 0.06);
  color: var(--primary);
}

#faq details p {
  padding: 0 22px 18px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  animation: faqReveal 0.4s ease both;
}

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

#howto ol {
  counter-reset: howto-step;
  display: grid;
  gap: 12px;
  margin: 16px 0 24px;
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding: 14px 18px 14px 58px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.94rem;
  transition: transform var(--transition-base), border-color var(--transition-base),
    box-shadow var(--transition-base);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.35);
}

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

#cases blockquote {
  margin: 16px 0;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border-left: 4px solid var(--primary);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  top: 4px;
  right: 18px;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.15;
  font-family: Georgia, serif;
}

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

#cases blockquote p {
  font-size: 0.94rem;
  font-style: italic;
  color: var(--text-secondary);
  margin: 0;
}

#contact address {
  font-style: normal;
}

#contact address p {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.95rem;
}

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

#contact address strong {
  color: var(--text-primary);
  margin-right: 6px;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

#sitemap a,
#links a {
  display: block;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  background: rgba(233, 69, 96, 0.06);
}

#legal h3 {
  margin-top: 28px;
}

#legal h3:first-of-type {
  margin-top: 0;
}

#site-footer {
  margin-top: 80px;
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
  color: #cfcfe6;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.25), transparent 70%);
  pointer-events: none;
}

#site-footer::after {
  content: "";
  position: absolute;
  bottom: -140px;
  left: -100px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.35), transparent 70%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 36px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr 1fr;
  gap: 36px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.footer-col p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: #a8a8c8;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col li {
  font-size: 0.88rem;
  color: #a8a8c8;
  line-height: 1.7;
}

.footer-col a {
  color: #a8a8c8;
  position: relative;
  padding-left: 0;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-col a::before {
  content: "›";
  position: absolute;
  left: -12px;
  opacity: 0;
  color: var(--primary);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  transform: translateX(-4px);
}

.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 8px;
}

.footer-col a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-bottom {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 22px 24px 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: #8888aa;
  line-height: 1.8;
}

.footer-bottom p:first-child {
  margin-bottom: 4px;
}

#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: var(--shadow-md), var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.85);
  transition: opacity var(--transition-base), visibility var(--transition-base),
    transform var(--transition-base), box-shadow var(--transition-base);
  z-index: 999;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-5px) scale(1.08);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(233, 69, 96, 0.6);
}

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

@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 (max-width: 1024px) {
  .header-inner {
    padding: 10px 18px;
  }

  #main-nav ul {
    gap: 0;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.86rem;
  }

  #site-search input {
    width: 120px;
  }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1.2fr;
    gap: 28px;
  }

  .footer-col:last-child {
    grid-column: 1 / -1;
  }

  .footer-col:last-child ul {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}

@media (max-width: 860px) {
  #main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 82vw);
    height: 100vh;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    padding: 80px 24px 32px;
    transform: translateX(105%);
    transition: transform var(--transition-base);
    z-index: 1100;
    overflow-y: auto;
  }

  #main-nav.open {
    transform: translateX(0);
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  #main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  #main-nav a::after {
    display: none;
  }

  #menu-toggle {
    display: flex;
  }

  #site-search {
    display: none;
  }

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

  .hero-content {
    padding: 28px 20px;
  }

  main > section {
    padding: 28px 20px;
    margin-top: 44px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 40px 20px 28px;
  }

  .footer-col:first-child {
    grid-column: 1 / -1;
  }

  .footer-col:last-child {
    grid-column: 1 / -1;
  }

  .banner-prev,
  .banner-next {
    width: 38px;
    height: 38px;
    font-size: 1.3rem;
  }

  .banner-prev {
    left: 10px;
  }

  .banner-next {
    right: 10px;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

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

  .header-inner {
    padding: 10px 14px;
    gap: 10px;
  }

  .site-name {
    font-size: 1rem;
  }

  .logo-area svg {
    width: 34px;
    height: 34px;
  }

  #breadcrumb {
    padding: 12px 14px 0;
  }

  main {
    padding: 0 14px 40px;
  }

  .hero-content {
    padding: 22px 16px;
    border-radius: var(--radius-md);
  }

  .hero-lead {
    font-size: 0.92rem;
  }

  .hero-stats {
    gap: 10px;
  }

  .stat-item {
    padding: 14px 8px;
  }

  .stat-label {
    font-size: 0.74rem;
  }

  .cta-button {
    padding: 12px 30px;
    font-size: 0.92rem;
  }

  main > section {
    padding: 22px 16px;
    border-radius: var(--radius-md);
  }

  main > section > h2 {
    padding-left: 16px;
    margin-bottom: 18px;
  }

  #articles article {
    padding: 16px 16px;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

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

  #howto ol li {
    padding: 12px 14px 12px 50px;
    font-size: 0.88rem;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }

  #cases blockquote {
    padding: 16px 18px;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 32px 16px 24px;
  }

  .footer-col:first-child,
  .footer-col:last-child {
    grid-column: auto;
  }

  .footer-bottom {
    padding: 18px 16px 22px;
  }

  .footer-bottom p {
    font-size: 0.74rem;
  }

  .banner-dots button {
    width: 8px;
    height: 8px;
  }

  .banner-dots button[aria-selected="true"] {
    width: 22px;
  }
}

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

  .stat-number {
    font-size: 1.25rem;
  }
}

@media print {
  #site-header,
  #back-to-top,
  .banner-prev,
  .banner-next,
  .banner-dots,
  #site-footer {
    display: none !important;
  }

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

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