:root {
  --bg-primary: #f5f6fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef0f6;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a5e;
  --text-muted: #7a7a8e;
  --accent: #e94560;
  --accent-hover: #d63851;
  --accent-secondary: #533483;
  --accent-tertiary: #0f3460;
  --border: #e0e2ec;
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 20px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 8px 40px rgba(26, 26, 46, 0.14);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 70%, #533483 100%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #533483 100%);
  --gradient-card: linear-gradient(145deg, rgba(233, 69, 96, 0.06), rgba(83, 52, 131, 0.06));
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg-primary: #12121e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #eaeaf2;
  --text-secondary: #b0b0c8;
  --text-muted: #7878a0;
  --accent: #ff5a7a;
  --accent-hover: #ff7a95;
  --accent-secondary: #7b5ea7;
  --accent-tertiary: #1a4a7a;
  --border: #2a2a42;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(26, 26, 46, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --gradient-hero: linear-gradient(135deg, #0a0a14 0%, #12121e 40%, #16213e 70%, #2a1a4e 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 90, 122, 0.08), rgba(123, 94, 167, 0.08));
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

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

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

a:hover {
  color: var(--accent-hover);
  opacity: 0.85;
}

ul,
ol {
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.4em;
}

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

h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.4rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.15rem); }

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

address {
  font-style: normal;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 1.2em 1.5em;
  margin: 1.2em 0;
  border-left: 4px solid var(--accent);
  transition: background var(--transition), border-color var(--transition);
}

address p {
  margin-bottom: 0.3em;
  color: var(--text-secondary);
}

address a {
  color: var(--accent);
  font-weight: 500;
}

blockquote {
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  padding: 1.2em 1.5em;
  margin: 1em 0;
  border-left: 4px solid var(--accent-secondary);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

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

details {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 0.8em;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

details:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--accent);
}

details[open] {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

details summary {
  cursor: pointer;
  padding: 1em 1.4em;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
  position: relative;
  padding-right: 3em;
  transition: background var(--transition), color var(--transition);
  user-select: none;
  font-size: 1.02rem;
}

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

details summary::after {
  content: "+";
  position: absolute;
  right: 1.4em;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform var(--transition), color var(--transition);
  line-height: 1;
}

details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

details summary:hover {
  background: var(--gradient-card);
}

details > p {
  padding: 0 1.4em 1.2em;
  margin: 0;
  animation: fadeSlideIn 0.35s ease;
}

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.7em 1.5em;
  display: flex;
  align-items: center;
  gap: 1.2em;
  flex-wrap: wrap;
}

.header-inner > a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.2;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  font-weight: 400;
}

#site-header nav {
  flex: 1;
  min-width: 0;
}

#site-header nav ul {
  display: flex;
  gap: 0.3em;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

#site-header nav a {
  display: inline-block;
  padding: 0.45em 0.85em;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}

#site-header nav a:hover {
  background: var(--gradient-card);
  color: var(--accent);
  transform: translateY(-1px);
  opacity: 1;
}

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4em;
  flex-shrink: 0;
}

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

#site-header input[type="search"] {
  padding: 0.5em 1em;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-family: inherit;
  width: 180px;
  transition: border-color var(--transition), box-shadow var(--transition), width var(--transition), background var(--transition);
  outline: none;
}

#site-header input[type="search"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
  width: 220px;
}

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

#site-header form[role="search"] button,
#theme-toggle,
#menu-toggle {
  padding: 0.5em 1em;
  border-radius: var(--radius-xl);
  border: none;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  white-space: nowrap;
}

#site-header form[role="search"] button:hover,
#theme-toggle:hover,
#menu-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.35);
  opacity: 0.95;
}

#theme-toggle {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

#theme-toggle:hover {
  box-shadow: var(--shadow-sm);
  color: var(--accent);
}

#menu-toggle {
  display: none;
}

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5em 3em;
}

section {
  margin-bottom: 3.5em;
  scroll-margin-top: 90px;
}

section > h2 {
  position: relative;
  padding-bottom: 0.5em;
  margin-bottom: 1.2em;
}

section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition);
}

section:hover > h2::after {
  width: 100px;
}

#hero {
  position: relative;
  background: var(--gradient-hero);
  border-radius: var(--radius-xl);
  padding: clamp(2em, 5vw, 4em) clamp(1.5em, 4vw, 3.5em);
  margin-top: 1.5em;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: heroReveal 0.8s ease both;
}

@keyframes heroReveal {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.25), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatOrb 8s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.3), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatOrb 10s ease-in-out infinite reverse;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.08); }
}

#hero h1 {
  color: #fff;
  position: relative;
  z-index: 1;
  margin-bottom: 0.6em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

#hero > p {
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 1;
  max-width: 820px;
  font-size: 1.02rem;
}

#hero figure {
  position: relative;
  z-index: 1;
  margin-top: 2em;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}

#hero figure:hover {
  transform: scale(1.015);
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5);
}

#hero figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#hero figcaption {
  text-align: center;
  padding: 0.8em;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#brand,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: clamp(1.5em, 3.5vw, 2.8em);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

#brand:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news: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, 0.2);
}

#brand h3,
#products h3,
#solutions h3,
#cases h3,
#howto h3,
#contact h3,
#legal h3 {
  margin-top: 1.6em;
  margin-bottom: 0.5em;
  padding-left: 0.7em;
  border-left: 4px solid var(--accent);
  transition: border-color var(--transition), padding-left var(--transition);
}

#brand h3:hover,
#products h3:hover,
#solutions h3:hover,
#cases h3:hover,
#howto h3:hover,
#contact h3:hover,
#legal h3:hover {
  padding-left: 1em;
  border-color: var(--accent-secondary);
}

#products ul,
#solutions ul,
#news ul,
#howto ul,
#howto ol,
#sitemap ul,
#links ul {
  list-style: none;
  padding-left: 0;
}

#products ul li,
#solutions ul li,
#news ul li,
#howto ul li {
  position: relative;
  padding-left: 1.6em;
  margin-bottom: 0.6em;
  color: var(--text-secondary);
  transition: transform var(--transition), color var(--transition);
}

#products ul li::before,
#solutions ul li::before,
#news ul li::before,
#howto ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  transition: transform var(--transition);
}

#products ul li:hover,
#solutions ul li:hover,
#news ul li:hover,
#howto ul li:hover {
  transform: translateX(6px);
  color: var(--text-primary);
}

#products ul li:hover::before,
#solutions ul li:hover::before,
#news ul li:hover::before,
#howto ul li:hover::before {
  transform: scale(1.4);
}

#howto ol {
  counter-reset: howto-counter;
  padding-left: 0;
}

#howto ol li {
  counter-increment: howto-counter;
  position: relative;
  padding-left: 2.8em;
  margin-bottom: 0.9em;
  color: var(--text-secondary);
  transition: transform var(--transition), color var(--transition);
}

#howto ol li::before {
  content: counter(howto-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 1.8em;
  height: 1.8em;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(233, 69, 96, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  color: var(--text-primary);
}

#howto ol li:hover::before {
  transform: scale(1.15);
  box-shadow: 0 4px 14px rgba(233, 69, 96, 0.45);
}

#articles {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

#articles > h2 {
  padding-left: 0;
}

#articles > p {
  margin-bottom: 1.5em;
}

#articles article {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 1.5em 1.8em;
  margin-bottom: 1.2em;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

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

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.25);
}

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

#articles article h3 {
  margin-bottom: 0.4em;
  font-size: 1.15rem;
  transition: color var(--transition);
}

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

#articles article > p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.6em;
  display: inline-block;
  background: var(--bg-tertiary);
  padding: 0.15em 0.8em;
  border-radius: var(--radius-xl);
  transition: background var(--transition);
}

#articles article:hover > p:first-of-type {
  background: var(--gradient-card);
}

#articles article > p:last-of-type {
  margin-bottom: 0;
}

#articles article > p:last-of-type a {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.4em 1em;
  border-radius: var(--radius-xl);
  background: var(--gradient-accent);
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

#articles article > p:last-of-type a::after {
  content: "→";
  transition: transform var(--transition);
}

#articles article > p:last-of-type a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.4);
  opacity: 1;
}

#articles article > p:last-of-type a:hover::after {
  transform: translateX(4px);
}

#cases blockquote {
  margin-bottom: 1em;
}

#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6em;
}

#links ul li {
  margin-bottom: 0;
}

#links ul li a {
  display: inline-block;
  padding: 0.5em 1.2em;
  border-radius: var(--radius-xl);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

#links ul li a:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  opacity: 1;
}

#sitemap ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.4em;
}

#sitemap ul li a {
  display: block;
  padding: 0.5em 0.8em;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
}

#sitemap ul li a:hover {
  background: var(--gradient-card);
  color: var(--accent);
  padding-left: 1.2em;
  opacity: 1;
}

footer {
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.8);
  padding: 2.5em 1.5em 2em;
  margin-top: 3em;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.2), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

footer > p {
  max-width: 1280px;
  margin: 0 auto 0.5em;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.88rem;
  position: relative;
  z-index: 1;
}

footer nav {
  max-width: 1280px;
  margin: 1.2em auto 0;
  position: relative;
  z-index: 1;
}

footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
  list-style: none;
  padding: 0;
}

footer nav a {
  display: inline-block;
  padding: 0.35em 0.9em;
  border-radius: var(--radius-xl);
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.85rem;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

footer nav a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-2px);
  opacity: 1;
}

#back-to-top {
  position: fixed;
  bottom: 2em;
  right: 2em;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1.1;
  text-align: center;
  padding: 0;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.55);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

@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 {
    gap: 0.8em;
  }
  #site-header input[type="search"] {
    width: 150px;
  }
  #site-header input[type="search"]:focus {
    width: 180px;
  }
}

@media (max-width: 860px) {
  .header-inner {
    padding: 0.6em 1em;
  }
  #site-header nav {
    order: 4;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin 0.3s ease;
  }
  #site-header nav.open {
    max-height: 500px;
    margin-top: 0.5em;
  }
  #site-header nav ul {
    flex-direction: column;
    gap: 0.15em;
  }
  #site-header nav a {
    display: block;
    padding: 0.6em 1em;
    border-radius: var(--radius-sm);
  }
  #site-header form[role="search"] {
    order: 3;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin 0.3s ease;
  }
  #site-header form[role="search"].open {
    max-height: 80px;
    margin-top: 0.5em;
  }
  #site-header input[type="search"] {
    flex: 1;
    width: auto;
  }
  #site-header input[type="search"]:focus {
    width: auto;
  }
  #menu-toggle {
    display: inline-block;
    order: 2;
    margin-left: auto;
  }
  #theme-toggle {
    order: 2;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  main {
    padding: 0 0.8em 2em;
  }
  #hero {
    border-radius: var(--radius-lg);
    padding: 1.6em 1.2em;
    margin-top: 0.8em;
  }
  #hero h1 {
    font-size: 1.4rem;
  }
  section {
    margin-bottom: 2.2em;
    scroll-margin-top: 80px;
  }
  #brand,
  #products,
  #solutions,
  #cases,
  #news,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links,
  #legal {
    border-radius: var(--radius-md);
    padding: 1.2em 1.1em;
  }
  #articles article {
    padding: 1.1em 1.2em;
  }
  #articles article h3 {
    font-size: 1.02rem;
  }
  #sitemap ul {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
  #back-to-top {
    bottom: 1.2em;
    right: 1.2em;
    width: 42px;
    height: 42px;
    font-size: 0.65rem;
  }
  footer {
    padding: 2em 1em 1.5em;
  }
  footer nav ul {
    gap: 0.3em;
  }
  footer nav a {
    font-size: 0.8rem;
    padding: 0.3em 0.7em;
  }
  details summary {
    padding: 0.85em 1.1em;
    padding-right: 2.6em;
    font-size: 0.95rem;
  }
  details summary::after {
    right: 1.1em;
  }
  details > p {
    padding: 0 1.1em 1em;
    font-size: 0.92rem;
  }
  address {
    padding: 1em 1.1em;
  }
}

@media (max-width: 380px) {
  .logo-text {
    font-size: 1.1rem;
  }
  .logo-sub {
    font-size: 0.62rem;
  }
  #hero h1 {
    font-size: 1.25rem;
  }
  #sitemap ul {
    grid-template-columns: 1fr;
  }
}

::selection {
  background: rgba(233, 69, 96, 0.25);
  color: var(--text-primary);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
  transition: background var(--transition);
}

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

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media print {
  #site-header,
  #back-to-top,
  footer nav,
  #theme-toggle,
  #menu-toggle {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}