:root {
  --brand: #ff5a5f;
  --brand-dark: #e0484d;
  --brand-light: #ff8a8e;
  --accent: #ffb400;
  --accent-2: #4a90d9;
  --bg: #fff8f8;
  --bg-alt: #ffffff;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.65);
  --text: #2b2320;
  --text-soft: #6b5f5c;
  --text-muted: #9a8d89;
  --border: rgba(255, 90, 95, 0.14);
  --shadow-sm: 0 2px 8px rgba(180, 60, 60, 0.06);
  --shadow-md: 0 10px 30px rgba(180, 60, 60, 0.1);
  --shadow-lg: 0 20px 50px rgba(180, 60, 60, 0.16);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --maxw: 1180px;
  --header-h: 72px;
  --gradient-banner: linear-gradient(135deg, #ff5a5f 0%, #ff8a5c 45%, #ffb400 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255, 90, 95, 0.12), rgba(255, 180, 0, 0.12));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 0.35s var(--ease);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171214;
    --bg-alt: #1e181a;
    --surface: #221b1e;
    --surface-glass: rgba(34, 27, 30, 0.62);
    --text: #f4ecec;
    --text-soft: #c9bcbc;
    --text-muted: #9a8d8d;
    --border: rgba(255, 138, 142, 0.18);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);
    --gradient-soft: linear-gradient(135deg, rgba(255, 90, 95, 0.18), rgba(255, 180, 0, 0.14));
  }
}

[data-theme="dark"] {
  --bg: #171214;
  --bg-alt: #1e181a;
  --surface: #221b1e;
  --surface-glass: rgba(34, 27, 30, 0.62);
  --text: #f4ecec;
  --text-soft: #c9bcbc;
  --text-muted: #9a8d8d;
  --border: rgba(255, 138, 142, 0.18);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);
  --gradient-soft: linear-gradient(135deg, rgba(255, 90, 95, 0.18), rgba(255, 180, 0, 0.14));
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 90, 95, 0.1), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(255, 180, 0, 0.1), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(74, 144, 217, 0.08), transparent 46%);
  background-attachment: fixed;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

a {
  color: var(--brand);
  text-decoration: none;
  transition: color var(--transition);
}

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

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.2px;
}

h1 {
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
}

h2 {
  font-size: clamp(1.35rem, 3vw, 2rem);
  margin: 0 0 1rem;
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--gradient-banner);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  margin: 1.8rem 0 0.6rem;
  color: var(--text);
}

p {
  margin: 0 0 1rem;
  color: var(--text-soft);
}

ul, ol {
  color: var(--text-soft);
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.4rem;
}

strong {
  color: var(--text);
}

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

/* ============ Header ============ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.brand a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
}

.brand svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand a:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: var(--shadow-md);
}

.brand-name {
  font-size: 1.15rem;
  letter-spacing: 0.5px;
  background: var(--gradient-banner);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.main-nav a {
  display: inline-block;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 600;
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-banner);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}

.main-nav a:hover {
  color: var(--brand);
  background: rgba(255, 90, 95, 0.08);
  transform: translateY(-2px);
}

.main-nav a:hover::after {
  transform: scaleX(1);
}

.site-search {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.site-search input[type="search"] {
  width: 180px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), width var(--transition);
}

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

.site-search input[type="search"]:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(255, 90, 95, 0.16);
  width: 220px;
}

.site-search button,
#theme-toggle,
#menu-toggle {
  cursor: pointer;
  border: none;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 700;
  font-family: inherit;
  padding: 9px 16px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.site-search button {
  background: var(--gradient-banner);
  color: #fff;
  box-shadow: 0 6px 16px rgba(255, 90, 95, 0.3);
}

.site-search button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 90, 95, 0.42);
}

.site-search button:active {
  transform: translateY(0) scale(0.97);
}

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

#theme-toggle:hover {
  color: var(--brand);
  border-color: var(--brand-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
  background: var(--gradient-banner);
  color: #fff;
}

/* ============ Main layout ============ */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px 60px;
}

main > section {
  margin: 0 0 48px;
  padding: 32px clamp(18px, 3.4vw, 40px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

main > section::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.35), transparent 28%);
  opacity: 0.6;
}

[data-theme="dark"] main > section::after {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), transparent 30%);
}

main > section:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

main > section > * {
  position: relative;
  z-index: 1;
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0 4px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.breadcrumb li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "›";
  color: var(--text-muted);
  font-size: 1rem;
}

.breadcrumb a {
  color: var(--text-soft);
  padding: 2px 4px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

.breadcrumb a:hover {
  color: var(--brand);
  background: rgba(255, 90, 95, 0.08);
}

/* ============ Hero ============ */
#hero {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.05)),
    var(--gradient-banner);
  border: none;
  color: #fff;
  text-align: center;
  padding-top: clamp(36px, 6vw, 64px);
  padding-bottom: clamp(36px, 6vw, 64px);
}

#hero::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  top: -180px;
  right: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.35), transparent 68%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  bottom: -200px;
  left: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 70%);
  pointer-events: none;
  opacity: 1;
}

#hero h1 {
  color: #fff;
  text-shadow: 0 4px 18px rgba(160, 30, 40, 0.28);
  animation: heroRise 0.9s var(--ease) both;
}

#hero .hero-lead {
  max-width: 820px;
  margin: 0 auto 26px;
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  animation: heroRise 0.9s 0.12s var(--ease) both;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
  animation: heroRise 0.9s 0.22s var(--ease) both;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.4px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn-primary {
  background: #fff;
  color: var(--brand);
  box-shadow: 0 10px 26px rgba(120, 20, 30, 0.28);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  color: var(--brand-dark);
  box-shadow: 0 16px 34px rgba(120, 20, 30, 0.38);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  color: #fff;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 30px rgba(120, 20, 30, 0.26);
}

.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

.hero-figure {
  margin: 0 auto;
  max-width: 760px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 22px 48px rgba(120, 20, 30, 0.3);
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  animation: heroRise 0.9s 0.32s var(--ease) both;
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-figure:hover {
  transform: translateY(-6px) rotate(-0.4deg);
  box-shadow: 0 30px 60px rgba(120, 20, 30, 0.38);
}

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

.hero-figure figcaption {
  padding: 12px 18px;
  font-size: 0.85rem;
  color: #5a3030;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-align: center;
}

@keyframes heroRise {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ Lists inside sections ============ */
#about ul,
#products ul,
#howto ul,
#howto ol {
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px 18px 40px;
  margin: 14px 0 18px;
  list-style-position: outside;
}

#about ul li,
#products ul li,
#howto ul li,
#howto ol li {
  position: relative;
  transition: transform var(--transition), color var(--transition);
}

#about ul li:hover,
#products ul li:hover,
#howto ul li:hover,
#howto ol li:hover {
  color: var(--text);
  transform: translateX(4px);
}

#about ul li::marker,
#products ul li::marker,
#howto ul li::marker,
#howto ol li::marker {
  color: var(--brand);
  font-weight: 700;
}

/* ============ News ============ */
#news ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

#news li {
  position: relative;
  padding: 14px 18px 14px 46px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#news li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--gradient-banner);
  box-shadow: 0 0 0 4px rgba(255, 90, 95, 0.14);
}

#news li:hover {
  transform: translateX(6px);
  border-color: var(--brand-light);
  box-shadow: var(--shadow-sm);
}

#news strong {
  color: var(--brand);
  margin-right: 4px;
}

/* ============ Articles ============ */
#articles > p {
  margin-bottom: 24px;
}

#articles article {
  position: relative;
  padding: 22px 24px;
  margin-bottom: 18px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

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

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-light);
}

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

#articles h3 {
  margin-top: 0;
  font-size: 1.12rem;
  transition: color var(--transition);
}

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

#articles time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255, 90, 95, 0.08);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

#articles article > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 90, 95, 0.1);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

#articles article > a:hover {
  background: var(--brand);
  color: #fff;
  transform: translateX(2px);
}

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

/* ============ Cases / blockquote ============ */
#cases blockquote {
  position: relative;
  margin: 14px 0;
  padding: 20px 24px 20px 52px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "“";
  position: absolute;
  left: 16px;
  top: 4px;
  font-size: 3rem;
  line-height: 1;
  color: var(--brand);
  opacity: 0.55;
  font-family: Georgia, serif;
}

#cases blockquote p {
  margin: 0;
  color: var(--text-soft);
  font-style: italic;
}

#cases blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ============ FAQ ============ */
#faq details {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  padding: 0 20px;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

#faq details[open] {
  border-color: var(--brand-light);
  box-shadow: var(--shadow-md);
}

#faq details:hover {
  border-color: var(--brand-light);
  box-shadow: var(--shadow-sm);
}

#faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 34px 16px 0;
  font-weight: 700;
  color: var(--text);
  position: relative;
  transition: color var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  border-radius: 50%;
  background: rgba(255, 90, 95, 0.1);
  color: var(--brand);
  font-weight: 700;
  font-size: 1.1rem;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

#faq details[open] summary {
  color: var(--brand);
}

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

#faq details p {
  padding-bottom: 16px;
  margin: 0;
  animation: fadeIn 0.4s var(--ease);
}

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

/* ============ Contact / address ============ */
#contact address {
  font-style: normal;
}

#contact address ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

#contact address li {
  padding: 14px 18px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact address li:hover {
  transform: translateY(-3px);
  border-color: var(--brand-light);
  box-shadow: var(--shadow-sm);
}

/* ============ Sitemap & links ============ */
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap li,
#links li {
  margin: 0;
}

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}

#sitemap a:hover,
#links a:hover {
  background: var(--gradient-banner);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(255, 90, 95, 0.32);
}

/* ============ Footer ============ */
footer {
  position: relative;
  margin-top: 20px;
  padding: 48px 20px 32px;
  background: linear-gradient(180deg, transparent, rgba(255, 90, 95, 0.06));
  border-top: 1px solid var(--border);
}

footer > section,
footer > p {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
}

footer h2 {
  font-size: 1.1rem;
  padding-left: 14px;
}

footer h2::before {
  width: 4px;
}

footer section {
  margin-bottom: 26px;
}

footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

footer > p {
  text-align: center;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}

footer small {
  color: var(--text-muted);
}

/* ============ Back to top ============ */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  background: var(--gradient-banner);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: inherit;
  box-shadow: 0 12px 28px rgba(255, 90, 95, 0.42);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  opacity: 0.92;
}

#back-to-top:hover {
  transform: translateY(-5px) scale(1.06);
  box-shadow: 0 18px 36px rgba(255, 90, 95, 0.55);
  opacity: 1;
}

#back-to-top:active {
  transform: translateY(0) scale(0.96);
}

/* ============ Scroll animations ============ */
@media (prefers-reduced-motion: no-preference) {
  main > section,
  #articles article,
  #news li,
  #faq details {
    animation: scrollReveal linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  @keyframes scrollReveal {
    from {
      opacity: 0;
      transform: translateY(34px) scale(0.985);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============ Focus states ============ */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid var(--brand-light);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .header-inner {
    gap: 12px;
  }

  .site-search input[type="search"] {
    width: 150px;
  }

  .site-search input[type="search"]:focus {
    width: 180px;
  }

  .main-nav a {
    padding: 6px 9px;
    font-size: 0.86rem;
  }
}

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

  .header-inner {
    padding: 10px 16px;
    justify-content: space-between;
  }

  .site-search {
    order: 5;
    width: 100%;
    margin-left: 0;
    margin-top: 4px;
  }

  .site-search input[type="search"] {
    flex: 1;
    width: auto;
  }

  .site-search input[type="search"]:focus {
    width: auto;
  }

  #menu-toggle {
    display: inline-block;
    margin-left: auto;
  }

  .main-nav {
    display: none;
    order: 6;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px 0 6px;
    border-top: 1px solid var(--border);
    margin-top: 6px;
  }

  #site-header.nav-open .main-nav {
    display: flex;
    animation: fadeIn 0.3s var(--ease);
  }

  .main-nav li {
    margin: 0;
  }

  .main-nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

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

  main {
    padding: 18px 14px 48px;
  }

  main > section {
    padding: 26px 18px;
    border-radius: var(--radius);
    margin-bottom: 32px;
  }

  h2 {
    padding-left: 14px;
  }

  h2::before {
    width: 5px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

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

  .brand svg {
    width: 34px;
    height: 34px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
    padding: 13px 20px;
  }

  .hero-actions {
    gap: 10px;
  }

  #hero {
    padding-top: 30px;
    padding-bottom: 30px;
  }

  .hero-figure figcaption {
    font-size: 0.78rem;
    padding: 10px 12px;
  }

  #about ul,
  #products ul,
  #howto ul,
  #howto ol {
    padding: 14px 16px 14px 32px;
  }

  #contact address ul {
    grid-template-columns: 1fr;
  }

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

  #cases blockquote {
    padding: 18px 18px 18px 44px;
  }

  #back-to-top {
    right: 14px;
    bottom: 16px;
    width: 46px;
    height: 46px;
    font-size: 0.66rem;
  }

  footer {
    padding: 34px 16px 26px;
  }
}

@media (max-width: 380px) {
  .site-search {
    flex-wrap: wrap;
  }

  .site-search button {
    width: 100%;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</function>