:root {
  --color-primary: #7a1f2b;
  --color-primary-light: #a8324a;
  --color-accent: #e8c87a;
  --color-accent-soft: #f3e2b3;
  --color-bg: #faf7f2;
  --color-bg-alt: #f2ece2;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.65);
  --color-text: #241f1c;
  --color-text-soft: #5a514a;
  --color-text-muted: #8a7f76;
  --color-border: rgba(122, 31, 43, 0.14);
  --color-shadow: rgba(60, 30, 20, 0.12);
  --gradient-banner: linear-gradient(135deg, #7a1f2b 0%, #a8324a 45%, #c98a5b 100%);
  --gradient-accent: linear-gradient(120deg, #e8c87a 0%, #f3e2b3 50%, #d9a94f 100%);
  --gradient-card: linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.55));
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(60, 30, 20, 0.06);
  --shadow-md: 0 8px 26px rgba(60, 30, 20, 0.1);
  --shadow-lg: 0 18px 48px rgba(60, 30, 20, 0.16);
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  --max-width: 1180px;
  --header-height: 72px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "STSong", "SimSun", serif;
}

[data-theme="dark"] {
  --color-primary: #c14a5e;
  --color-primary-light: #e0687c;
  --color-accent: #e8c87a;
  --color-accent-soft: #6b5a33;
  --color-bg: #141219;
  --color-bg-alt: #1b1822;
  --color-surface: #221e2b;
  --color-surface-glass: rgba(34, 30, 43, 0.62);
  --color-text: #f0eae2;
  --color-text-soft: #c8bfb4;
  --color-text-muted: #948a80;
  --color-border: rgba(232, 200, 122, 0.16);
  --color-shadow: rgba(0, 0, 0, 0.5);
  --gradient-banner: linear-gradient(135deg, #3a1220 0%, #6b1d2e 45%, #8a4a3a 100%);
  --gradient-card: linear-gradient(160deg, rgba(46, 40, 58, 0.9), rgba(34, 30, 43, 0.55));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 26px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(232, 200, 122, 0.14), transparent 42%),
    radial-gradient(circle at 88% 0%, rgba(122, 31, 43, 0.1), transparent 38%);
  background-attachment: fixed;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: 1.35;
  color: var(--color-text);
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
h3 { font-size: clamp(1.12rem, 1.8vw, 1.35rem); }

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul, ol {
  padding-left: 1.4em;
  margin: 0 0 1em;
  color: var(--color-text-soft);
}

li {
  margin-bottom: 0.45em;
}

strong {
  color: var(--color-text);
  font-weight: 700;
}

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

.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(--color-surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.top-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  min-height: var(--header-height);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(232, 200, 122, 0.4), var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.brand-logo:hover svg {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 0 0 3px rgba(232, 200, 122, 0.6), var(--shadow-md);
}

.brand-logo strong {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  background: var(--gradient-banner);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
}

#primary-nav {
  flex: 1 1 auto;
  min-width: 0;
}

#primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

#primary-nav li {
  margin: 0;
}

#primary-nav a {
  display: inline-block;
  padding: 6px 11px;
  font-size: 0.9rem;
  color: var(--color-text-soft);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

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

#primary-nav a:hover,
#primary-nav a:focus-visible {
  color: var(--color-primary);
  background: rgba(122, 31, 43, 0.07);
  transform: translateY(-1px);
}

#primary-nav a:hover::after,
#primary-nav a:focus-visible::after {
  width: 60%;
}

#site-search {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px 14px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#site-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232, 200, 122, 0.25);
}

#search-input {
  border: none;
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.88rem;
  padding: 5px 0;
  width: 150px;
  min-width: 0;
  outline: none;
}

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

#site-search button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-banner);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

#site-search button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.08);
}

#theme-toggle,
#mobile-menu-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-soft);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

#theme-toggle:hover,
#mobile-menu-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

#mobile-menu-toggle {
  display: none;
}

/* ============ Main / Sections ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 40px;
}

main > section {
  margin: 40px 0;
  padding: clamp(20px, 3.5vw, 40px);
  background: var(--gradient-card);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow var(--transition-base), border-color var(--transition-base);
}

main > section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-accent);
  opacity: 0.85;
}

main > section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

main > section:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(232, 200, 122, 0.4);
}

@media (prefers-reduced-motion: reduce) {
  main > section {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ============ Banner ============ */
#banner {
  background: var(--gradient-banner);
  color: #fff;
  border: none;
  padding: clamp(28px, 5vw, 56px);
  margin-top: 28px;
}

#banner::before {
  height: 6px;
  background: var(--gradient-accent);
}

#banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(232, 200, 122, 0.28), transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.12), transparent 45%);
  pointer-events: none;
}

#banner > * {
  position: relative;
  z-index: 1;
}

#banner h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.3);
  margin-bottom: 0.4em;
}

#banner .lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.02rem;
  max-width: 62ch;
}

.banner-slider {
  position: relative;
  margin: 26px 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.banner-slider .slide {
  display: none;
  margin: 0;
  position: relative;
  animation: slideFade 0.7s ease;
}

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

@keyframes slideFade {
  from { opacity: 0; transform: scale(1.02); }
  to { opacity: 1; transform: scale(1); }
}

.banner-slider svg {
  width: 100%;
  height: clamp(180px, 30vw, 300px);
  object-fit: cover;
  display: block;
}

.banner-slider figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 22px 16px;
  font-size: 0.92rem;
  color: #fff;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.72), transparent);
  letter-spacing: 0.02em;
}

.slider-controls {
  position: absolute;
  right: 16px;
  bottom: 14px;
  display: flex;
  gap: 8px;
  z-index: 2;
}

.slider-controls button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.slider-controls button:hover,
.slider-controls button:focus-visible {
  background: var(--color-accent);
  color: #241f1c;
  border-color: var(--color-accent);
  transform: scale(1.1);
}

.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
}

.breadcrumb li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "›";
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

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

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

/* ============ Content elements ============ */
#brand h3,
#products h3,
#solutions h3,
#cases h3,
#news h3,
#articles h3,
#faq h3,
#howto h3,
#contact h3,
#legal h3 {
  margin-top: 1.6em;
  padding-left: 14px;
  position: relative;
}

#brand h3::before,
#products h3::before,
#solutions h3::before,
#cases h3::before,
#news h3::before,
#articles h3::before,
#faq h3::before,
#howto h3::before,
#contact h3::before,
#legal h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.22em;
  bottom: 0.22em;
  width: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
}

#products ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

#products ul li {
  margin: 0;
  padding: 16px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#products ul li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

#products ul li strong {
  display: block;
  margin-bottom: 4px;
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: 1.02rem;
}

/* ============ Articles & News cards ============ */
#news article,
#articles article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 200, 122, 0.55);
}

#news article h3,
#articles article h3 {
  margin-top: 0;
  padding-left: 0;
}

#news article h3::before,
#articles article h3::before {
  display: none;
}

#news article time,
#articles article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: var(--radius-pill);
  padding: 2px 12px;
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary);
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

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

#articles article a:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

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

#articles {
  display: block;
}

#articles > article {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "title title"
    "date date"
    "summary summary"
    "link link";
  align-items: start;
}

#articles > article h3 { grid-area: title; }
#articles > article time { grid-area: date; justify-self: start; }
#articles > article p { grid-area: summary; }
#articles > article a { grid-area: link; justify-self: start; margin-top: 4px; }

/* ============ Blockquotes (cases) ============ */
blockquote {
  margin: 0 0 16px;
  padding: 18px 22px 18px 26px;
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

blockquote::before {
  content: "“";
  position: absolute;
  top: -6px;
  left: 10px;
  font-family: var(--font-serif);
  font-size: 3rem;
  color: rgba(232, 200, 122, 0.45);
  line-height: 1;
}

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

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

/* ============ FAQ details ============ */
#faq details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  padding: 0;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  overflow: hidden;
}

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

#faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 48px 16px 20px;
  font-weight: 600;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-text);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-base), color var(--transition-fast);
}

#faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--color-accent);
}

#faq summary:hover {
  background: rgba(232, 200, 122, 0.1);
  color: var(--color-primary);
}

#faq details p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.95rem;
  animation: faqFade 0.4s ease;
}

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

/* ============ HowTo steps ============ */
#howto ol {
  counter-reset: howto-step;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 12px;
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding: 14px 18px 14px 58px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: 0;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-banner);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(122, 31, 43, 0.3);
}

#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

#howto ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 10px;
}

#howto ul li {
  margin: 0;
  padding: 10px 14px 10px 34px;
  position: relative;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
}

#howto ul li::before {
  content: "✦";
  position: absolute;
  left: 12px;
  color: var(--color-accent);
}

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

#contact address ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

#contact address li {
  margin: 0;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-size: 0.94rem;
  transition: border-color var(--transition-fast), transform var(--transition-base), box-shadow var(--transition-base);
}

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

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

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 7px 18px;
  font-size: 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  background: var(--gradient-banner);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============ Page info ============ */
#about-page ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

#about-page li {
  margin: 0;
  padding: 12px 16px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-soft);
  border-left: 3px solid var(--color-accent);
}

/* ============ Footer ============ */
#site-footer {
  background: var(--gradient-banner);
  color: rgba(255, 255, 255, 0.85);
  padding: 36px 20px 28px;
  margin-top: 20px;
  position: relative;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

#site-footer > p {
  max-width: var(--max-width);
  margin: 0 auto 16px;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.88rem;
}

#site-footer nav {
  max-width: var(--max-width);
  margin: 0 auto;
}

#site-footer nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
}

#site-footer nav li {
  margin: 0;
}

#site-footer a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.88rem;
  position: relative;
  padding-bottom: 2px;
}

#site-footer a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

#site-footer a:hover {
  color: var(--color-accent);
}

#site-footer a:hover::after {
  width: 100%;
}

/* ============ Back to top ============ */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-banner);
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-fast);
}

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

#back-to-top:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .top-bar {
    gap: 12px;
  }
  #search-input {
    width: 120px;
  }
  #primary-nav a {
    padding: 6px 8px;
    font-size: 0.86rem;
  }
}

@media (max-width: 860px) {
  .top-bar {
    padding: 10px 16px;
  }
  #mobile-menu-toggle {
    display: inline-block;
  }
  #primary-nav {
    order: 10;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), opacity var(--transition-base);
    opacity: 0;
  }
  #primary-nav.is-open {
    max-height: 480px;
    opacity: 1;
    padding-top: 8px;
    border-top: 1px dashed var(--color-border);
  }
  #primary-nav ul {
    flex-direction: column;
    gap: 2px;
  }
  #primary-nav a {
    display: block;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.94rem;
  }
  #site-search {
    order: 5;
    flex: 1 1 100%;
    max-width: 100%;
  }
  #search-input {
    width: 100%;
    flex: 1;
  }
  main {
    padding: 0 14px 30px;
  }
  main > section {
    margin: 26px 0;
  }
  #articles > article {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "date"
      "summary"
      "link";
  }
  #banner {
    margin-top: 18px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }
  .brand-logo strong {
    font-size: 1.05rem;
  }
  .brand-logo svg {
    width: 30px;
    height: 30px;
  }
  #theme-toggle,
  #mobile-menu-toggle {
    padding: 7px 12px;
    font-size: 0.8rem;
  }
  .banner-slider figcaption {
    font-size: 0.82rem;
    padding: 28px 16px 14px;
  }
  .slider-controls {
    right: 10px;
    bottom: 10px;
  }
  .slider-controls button {
    width: 30px;
    height: 30px;
    font-size: 0.78rem;
  }
  #products ul {
    grid-template-columns: 1fr;
  }
  #howto ol li {
    padding: 12px 14px 12px 50px;
  }
  #howto ul {
    grid-template-columns: 1fr;
  }
  #contact address ul {
    grid-template-columns: 1fr;
  }
  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 10px 14px;
    font-size: 0.76rem;
  }
}

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

@media print {
  #site-header,
  #back-to-top,
  #site-footer nav,
  .slider-controls {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    opacity: 1;
    transform: none;
  }
}