:root {
  --color-primary: #c8102e;
  --color-primary-dark: #9a0c23;
  --color-primary-light: #e63950;
  --color-accent: #ff6b35;
  --color-accent-2: #f7b731;
  --color-bg: #f7f8fa;
  --color-bg-alt: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.72);
  --color-surface-solid: #ffffff;
  --color-text: #1a1d24;
  --color-text-soft: #4a5160;
  --color-text-muted: #767e8d;
  --color-border: rgba(26, 29, 36, 0.1);
  --color-border-strong: rgba(26, 29, 36, 0.18);
  --shadow-sm: 0 2px 8px rgba(26, 29, 36, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 29, 36, 0.09);
  --shadow-lg: 0 16px 48px rgba(26, 29, 36, 0.14);
  --shadow-primary: 0 8px 24px rgba(200, 16, 46, 0.28);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --gradient-hero: linear-gradient(135deg, #c8102e 0%, #e63950 38%, #ff6b35 78%, #f7b731 100%);
  --gradient-soft: linear-gradient(135deg, rgba(200, 16, 46, 0.08), rgba(255, 107, 53, 0.08));
  --gradient-accent: linear-gradient(90deg, #c8102e, #ff6b35);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --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(0.16, 1, 0.3, 1);
  --header-height: 72px;
  --max-width: 1180px;
}

html[data-theme="dark"] {
  --color-bg: #0e1015;
  --color-bg-alt: #151821;
  --color-surface: rgba(28, 32, 44, 0.72);
  --color-surface-solid: #1c202c;
  --color-text: #eef0f4;
  --color-text-soft: #b8bec9;
  --color-text-muted: #8a92a1;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-strong: rgba(255, 255, 255, 0.2);
  --color-primary: #ff4d66;
  --color-primary-dark: #e63950;
  --color-primary-light: #ff7a8c;
  --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, 0.55);
  --shadow-primary: 0 8px 24px rgba(255, 77, 102, 0.32);
  --gradient-hero: linear-gradient(135deg, #7a0a1c 0%, #b3122a 38%, #c8441f 78%, #a87516 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255, 77, 102, 0.12), rgba(255, 107, 53, 0.08));
}

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

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

body {
  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(200, 16, 46, 0.06), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(255, 107, 53, 0.06), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(247, 183, 49, 0.05), transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

html[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 77, 102, 0.1), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(255, 107, 53, 0.07), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(247, 183, 49, 0.05), transparent 50%);
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.9rem); }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.35rem); }
h4 { font-size: 1.05rem; }

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

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

li {
  color: var(--color-text-soft);
  margin-bottom: 0.4em;
}

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

.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: 1000;
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

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

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-text);
}

.brand-logo {
  border-radius: 10px;
  box-shadow: var(--shadow-primary);
  transition: transform var(--transition-base);
}

.brand:hover .brand-logo {
  transform: rotate(-6deg) scale(1.06);
}

.brand-text {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
  min-width: 0;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.main-nav ul::-webkit-scrollbar {
  display: none;
}

.main-nav a {
  display: block;
  padding: 8px 11px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.main-nav a:hover {
  color: var(--color-primary);
  background: var(--gradient-soft);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 4px 4px 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-search:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.12);
}

.site-search input {
  border: none;
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.85rem;
  width: 170px;
  padding: 6px 0;
  outline: none;
}

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

.site-search button {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.site-search button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
}

#theme-toggle,
#menu-toggle {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text-soft);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

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

#menu-toggle {
  display: none;
}

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

main > section {
  margin-top: 56px;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

main > section > h2 {
  position: relative;
  padding-left: 18px;
  margin-bottom: 22px;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--gradient-accent);
  box-shadow: var(--shadow-primary);
}

main > section > h3 {
  margin: 22px 0 10px;
  color: var(--color-text);
}

main > section > h3::before {
  content: "◆";
  color: var(--color-primary);
  font-size: 0.7em;
  margin-right: 8px;
  vertical-align: middle;
}

main > section > p {
  max-width: 78ch;
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  margin-top: 20px;
  font-size: 0.85rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 8px 16px;
  margin: 0;
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  width: fit-content;
  max-width: 100%;
}

.breadcrumb li {
  margin: 0;
  color: var(--color-text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-text-muted);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--color-primary);
  font-weight: 500;
}

/* ============ Hero ============ */
.hero {
  margin-top: 24px !important;
}

.hero-slider {
  position: relative;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite;
  color: #fff;
  padding: clamp(28px, 5vw, 56px);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.hero-slider::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.22), transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.12), transparent 40%);
  z-index: -1;
  pointer-events: none;
}

.hero-slider::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 255, 255, 0.25);
  z-index: -1;
  animation: spinSlow 40s linear infinite;
}

.hero-slider .slide {
  display: none;
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-slider .slide.is-active {
  display: block;
}

.hero-slider h1,
.hero-slider h2 {
  color: #fff;
  max-width: 22ch;
  margin-bottom: 16px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
}

.hero-slider p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  margin-bottom: 24px;
}

.cta {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast);
}

.cta:hover {
  color: var(--color-primary-dark);
  background: #fff;
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.26);
}

.slider-controls {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.slider-controls button {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.12);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.slider-controls button:hover {
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.hero-stats .stat {
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
}

.hero-stats .stat:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.hero-stats .num {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-primary);
  line-height: 1.2;
}

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

/* ============ Generic card-ish sections ============ */
#brand,
#products,
#solutions,
#applications,
#cases,
#news,
#knowledge,
#howto,
#contact,
#sitemap,
#links,
#privacy,
#disclaimer,
#copyright {
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 4vw, 40px);
  box-shadow: var(--shadow-sm);
}

#brand > h2,
#products > h2,
#solutions > h2,
#applications > h2,
#cases > h2,
#news > h2,
#knowledge > h2,
#howto > h2,
#contact > h2,
#sitemap > h2,
#links > h2,
#privacy > h2,
#disclaimer > h2,
#copyright > h2 {
  margin-top: 0;
}

/* ============ Articles ============ */
#articles > h2 {
  margin-bottom: 26px;
}

#articles article {
  position: relative;
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
}

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

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

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

#articles article h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  transition: color var(--transition-fast);
}

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

#articles article .meta {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--color-border-strong);
}

#articles article p:not(.meta) {
  font-size: 0.95rem;
  margin-bottom: 14px;
}

#articles article > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

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

#articles article > a:hover {
  gap: 10px;
}

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

/* ============ FAQ ============ */
#faq details {
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  padding: 0 20px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-base);
}

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

#faq summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  transition: color var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
  transition: transform var(--transition-base), background-color var(--transition-fast);
}

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

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

#faq details p {
  padding: 0 0 18px;
  margin: 0;
  font-size: 0.95rem;
  animation: fadeUp 0.35s ease both;
}

/* ============ HowTo ============ */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding: 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 12px 16px 12px 52px;
  margin-bottom: 10px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: var(--shadow-primary);
}

#howto ol li:hover {
  transform: translateX(4px);
  border-color: var(--color-primary);
}

/* ============ Contact / Sitemap / Links ============ */
#contact p,
#privacy p,
#disclaimer p,
#copyright p {
  max-width: 82ch;
}

#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: 8px 16px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-soft);
  transition: all var(--transition-fast);
}

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

/* ============ Footer ============ */
#site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 36px 20px;
  text-align: center;
}

.footer-inner p {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  margin-top: 16px;
}

.footer-inner nav a {
  font-size: 0.86rem;
  color: var(--color-text-soft);
  position: relative;
  transition: color var(--transition-fast);
}

.footer-inner nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1.5px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

/* ============ Back to top ============ */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  box-shadow: var(--shadow-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.05);
}

/* ============ Animations ============ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Scroll reveal utility (applied by JS) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  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;
  }
}

/* ============ Responsive ============ */
@media (max-width: 1080px) {
  .site-search input {
    width: 130px;
  }
  .main-nav a {
    padding: 8px 8px;
    font-size: 0.86rem;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 16px;
  }

  .main-nav {
    order: 3;
    flex-basis: 100%;
    display: none;
  }

  .main-nav.is-open {
    display: block;
    animation: fadeUp 0.3s ease both;
  }

  .main-nav ul {
    flex-wrap: wrap;
    gap: 4px;
    padding: 6px 0 4px;
    border-top: 1px solid var(--color-border);
  }

  .main-nav a {
    padding: 8px 12px;
    font-size: 0.88rem;
  }

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

  .header-actions {
    margin-left: auto;
  }

  .site-search {
    display: none;
  }

  #menu-toggle {
    display: inline-block;
  }

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

  main {
    padding: 0 16px 48px;
  }

  main > section {
    margin-top: 40px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .brand-text {
    font-size: 1.02rem;
  }

  .brand-logo {
    width: 34px;
    height: 34px;
  }

  #theme-toggle {
    padding: 7px 11px;
    font-size: 0.76rem;
  }

  #menu-toggle {
    padding: 7px 12px;
    font-size: 0.76rem;
  }

  .hero-slider {
    border-radius: var(--radius-lg);
    padding: 24px 20px;
  }

  .hero-slider h1,
  .hero-slider h2 {
    max-width: none;
  }

  .hero-slider::after {
    width: 200px;
    height: 200px;
    right: -60px;
    top: -60px;
  }

  .cta {
    padding: 11px 22px;
    font-size: 0.9rem;
  }

  .slider-controls {
    margin-top: 22px;
  }

  .slider-controls button {
    padding: 7px 16px;
    font-size: 0.8rem;
  }

  .hero-stats {
    gap: 10px;
  }

  .hero-stats .stat {
    padding: 16px 10px;
    border-radius: var(--radius-md);
  }

  .hero-stats .label {
    font-size: 0.75rem;
  }

  #brand,
  #products,
  #solutions,
  #applications,
  #cases,
  #news,
  #knowledge,
  #howto,
  #contact,
  #sitemap,
  #links,
  #privacy,
  #disclaimer,
  #copyright {
    padding: 20px 18px;
    border-radius: var(--radius-md);
  }

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

  #articles article h3 {
    font-size: 1.05rem;
  }

  #faq details {
    padding: 0 16px;
  }

  #faq summary {
    padding: 14px 0;
    font-size: 0.95rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 46px;
    font-size: 0.92rem;
  }

  #howto ol li::before {
    left: 10px;
    width: 24px;
    height: 24px;
    font-size: 0.78rem;
  }

  .breadcrumb ol {
    padding: 7px 12px;
    font-size: 0.8rem;
  }

  #back-to-top {
    right: 14px;
    bottom: 14px;
    width: 44px;
    height: 44px;
    font-size: 0.66rem;
  }

  .footer-inner {
    padding: 28px 16px;
  }
}

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

  .brand-text {
    display: none;
  }
}

/* ============ Print ============ */
@media print {
  #site-header,
  #back-to-top,
  .slider-controls,
  .hero-stats,
  #site-footer nav {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}