:root {
  --c-primary: #e63946;
  --c-primary-dark: #c1121f;
  --c-primary-light: #ff6b78;
  --c-accent: #457b9d;
  --c-accent-dark: #1d3557;
  --c-accent-light: #a8dadc;
  --c-warm: #f4a261;
  --c-warm-dark: #e76f51;
  --c-teal: #2a9d8f;
  --c-bg: #fbf7f4;
  --c-bg-alt: #f3ece7;
  --c-surface: #ffffff;
  --c-surface-glass: rgba(255, 255, 255, 0.72);
  --c-border: rgba(29, 53, 87, 0.12);
  --c-text: #22252b;
  --c-text-soft: #4a4f5a;
  --c-text-muted: #787f8c;
  --c-heading: #171a20;
  --c-link: #c1121f;
  --c-shadow-sm: 0 2px 8px rgba(29, 53, 87, 0.08);
  --c-shadow-md: 0 10px 30px rgba(29, 53, 87, 0.10);
  --c-shadow-lg: 0 20px 50px rgba(29, 53, 87, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --container: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --gradient-brand: linear-gradient(135deg, #e63946 0%, #f4a261 55%, #2a9d8f 100%);
  --gradient-hero: linear-gradient(135deg, #1d3557 0%, #457b9d 45%, #e63946 100%);
  --gradient-soft: linear-gradient(135deg, rgba(230, 57, 70, 0.10) 0%, rgba(42, 157, 143, 0.10) 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #10131a;
    --c-bg-alt: #171b24;
    --c-surface: #1c212c;
    --c-surface-glass: rgba(28, 33, 44, 0.72);
    --c-border: rgba(168, 218, 220, 0.14);
    --c-text: #e8ebf0;
    --c-text-soft: #b9c0cc;
    --c-text-muted: #8b94a3;
    --c-heading: #f5f7fa;
    --c-link: #ff6b78;
    --c-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --c-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
    --c-shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
    --gradient-hero: linear-gradient(135deg, #0b1220 0%, #1d3557 50%, #7a1420 100%);
  }
}

html[data-theme="dark"] {
  --c-bg: #10131a;
  --c-bg-alt: #171b24;
  --c-surface: #1c212c;
  --c-surface-glass: rgba(28, 33, 44, 0.72);
  --c-border: rgba(168, 218, 220, 0.14);
  --c-text: #e8ebf0;
  --c-text-soft: #b9c0cc;
  --c-text-muted: #8b94a3;
  --c-heading: #f5f7fa;
  --c-link: #ff6b78;
  --c-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --c-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --c-shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
  --gradient-hero: linear-gradient(135deg, #0b1220 0%, #1d3557 50%, #7a1420 100%);
}

html[data-theme="light"] {
  color-scheme: light;
}

html {
  color-scheme: light dark;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(230, 57, 70, 0.07), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(42, 157, 143, 0.08), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(69, 123, 157, 0.06), transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover,
a:focus-visible {
  color: var(--c-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  color: var(--c-heading);
  line-height: 1.3;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
  scroll-margin-top: 96px;
}

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.9rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 800;
  position: relative;
  padding-bottom: 0.4em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  margin-top: 1.6em;
}

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

ul,
ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
  color: var(--c-text-soft);
}

li {
  margin-bottom: 0.45em;
}

li::marker {
  color: var(--c-primary);
}

blockquote {
  margin: 1.2em 0;
  padding: 1em 1.4em;
  border-left: 4px solid var(--c-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--gradient-soft);
  color: var(--c-text-soft);
  font-style: italic;
}

blockquote p {
  margin-bottom: 0.4em;
}

blockquote cite {
  display: block;
  font-size: 0.9rem;
  font-style: normal;
  color: var(--c-text-muted);
}

time {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--c-shadow-sm);
  transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.7rem var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex-shrink: 0;
}

.brand a {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.brand a:hover {
  text-decoration: none;
}

.brand svg {
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand a:hover svg {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 6px 22px rgba(230, 57, 70, 0.5);
}

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

.brand-slogan {
  margin: 0;
  font-size: 0.72rem;
  color: var(--c-text-muted);
  white-space: nowrap;
}

.main-nav {
  flex: 1 1 auto;
}

.main-nav ul,
.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.35rem;
}

.main-nav a,
.mobile-nav a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-text-soft);
  text-decoration: none;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

.main-nav a:hover,
.main-nav a:focus-visible,
.mobile-nav a:hover {
  color: #fff;
  background: var(--c-primary);
  text-decoration: none;
  transform: translateY(-2px);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.site-search {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  background: var(--c-surface);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.site-search:focus-within {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.15);
}

.site-search input {
  border: 0;
  background: transparent;
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  color: var(--c-text);
  width: 160px;
  font-family: inherit;
  outline: none;
}

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

.site-search button {
  border: 0;
  padding: 0.45rem 1rem;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: filter var(--transition);
}

.site-search button:hover {
  filter: brightness(1.1);
}

.theme-toggle,
.menu-toggle {
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-text-soft);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  white-space: nowrap;
}

.theme-toggle:hover,
.menu-toggle:hover {
  color: #fff;
  background: var(--c-accent);
  border-color: var(--c-accent);
  transform: translateY(-2px);
  box-shadow: var(--c-shadow-sm);
}

.menu-toggle {
  display: none;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--c-border);
  padding: 0.6rem var(--gutter) 1rem;
  background: var(--c-surface-glass);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  animation: slideDown 0.3s ease both;
}

.mobile-nav ul {
  flex-direction: column;
  gap: 0.2rem;
}

.mobile-nav a {
  display: block;
  padding: 0.6rem 0.9rem;
}

.mobile-nav:not([hidden]) {
  display: block;
}

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

/* ============ Breadcrumb ============ */
.breadcrumb {
  max-width: var(--container);
  margin: 1rem auto 0;
  padding: 0 var(--gutter);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--c-text-muted);
}

.breadcrumb li {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--c-text-muted);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--c-text-muted);
}

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

/* ============ Main layout ============ */
main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter) 3rem;
}

main > section {
  margin-top: 2.6rem;
  padding: clamp(1.2rem, 3vw, 2.4rem);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--c-shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

main > section:hover {
  box-shadow: var(--c-shadow-md);
}

/* ============ Hero ============ */
.hero {
  margin-top: 1.4rem !important;
  background: var(--gradient-hero) !important;
  color: #f5f7fa;
  border: 0 !important;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(244, 162, 97, 0.45), transparent 62%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto auto -50% -10%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(168, 218, 220, 0.3), transparent 62%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}

.hero h1,
.hero h2,
.hero h3 {
  color: #fff;
}

.hero h1 {
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
}

.hero-lead {
  color: rgba(245, 247, 250, 0.9);
  font-size: clamp(0.95rem, 1.8vw, 1.08rem);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.4rem 0 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  will-change: transform;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-3px);
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 8px 22px rgba(230, 57, 70, 0.45);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-primary-dark);
  color: #fff;
  box-shadow: 0 12px 30px rgba(230, 57, 70, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.26);
  color: #fff;
  border-color: #fff;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.8rem;
  margin: 0 0 1.8rem;
  padding: 0;
  list-style: none;
}

.hero-stats .stat {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.hero-stats .stat:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.18);
}

.hero-stats strong {
  display: block;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}

.hero-stats span {
  display: block;
  font-size: 0.75rem;
  color: rgba(245, 247, 250, 0.82);
  margin-top: 0.25rem;
}

/* ============ Carousel ============ */
.hero-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-carousel .slide {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  box-shadow: var(--c-shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
  line-height: 0;
}

.hero-carousel .slide:hover {
  transform: translateY(-6px) scale(1.015);
  box-shadow: var(--c-shadow-lg);
}

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

.carousel-controls {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.6rem;
  justify-content: flex-end;
  margin-top: 0.2rem;
}

.carousel-controls button {
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

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

/* ============ Section content enhancements ============ */
#products ul,
#howto ul,
#howto ol,
#contact ul,
#sitemap ul,
#meta-info ul,
#applications ul {
  display: grid;
  gap: 0.5rem;
  padding-left: 0;
  list-style: none;
}

#products ul li,
#howto ul li,
#howto ol li,
#contact ul li,
#sitemap ul li,
#meta-info ul li,
#applications ul li {
  position: relative;
  padding: 0.7rem 1rem 0.7rem 2.4rem;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

#products ul li::before,
#howto ul li::before,
#contact ul li::before,
#sitemap ul li::before,
#meta-info ul li::before,
#applications ul li::before {
  content: "";
  position: absolute;
  left: 0.95rem;
  top: 1.1rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

#howto ol {
  counter-reset: step;
}

#howto ol li {
  counter-increment: step;
  padding-left: 3rem;
}

#howto ol li::before {
  content: counter(step);
  left: 0.7rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

#products ul li:hover,
#howto ul li:hover,
#howto ol li:hover,
#contact ul li:hover,
#sitemap ul li:hover,
#meta-info ul li:hover,
#applications ul li:hover {
  transform: translateX(4px);
  background: var(--c-surface);
  border-color: var(--c-primary-light);
}

/* ============ Articles / News cards ============ */
#news article,
#articles article {
  position: relative;
  padding: 1.2rem 1.3rem;
  margin-bottom: 1rem;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  opacity: 0.85;
}

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

#news article h3,
#articles article h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  border: 1px solid var(--c-border);
  transition: all var(--transition);
}

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

#articles article a:hover {
  text-decoration: none;
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

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

/* ============ FAQ ============ */
#faq details {
  margin-bottom: 0.7rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-bg-alt);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

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

#faq summary {
  cursor: pointer;
  padding: 0.9rem 2.8rem 0.9rem 1.2rem;
  font-weight: 700;
  color: var(--c-heading);
  position: relative;
  list-style: none;
  transition: background var(--transition), color var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--c-primary);
  transition: transform var(--transition);
}

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

#faq summary:hover {
  background: var(--gradient-soft);
  color: var(--c-primary);
}

#faq details p {
  margin: 0;
  padding: 0 1.2rem 1.1rem;
  animation: fadeIn 0.35s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Contact ============ */
#contact ul li strong {
  color: var(--c-heading);
}

/* ============ Footer ============ */
.site-footer {
  margin-top: 3rem;
  background: linear-gradient(160deg, #1d3557 0%, #14243d 60%, #0d1728 100%);
  color: rgba(245, 247, 250, 0.85);
  border-top: 4px solid transparent;
  border-image: var(--gradient-brand) 1;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.4rem var(--gutter) 1.6rem;
  display: grid;
  gap: 1.6rem;
}

.footer-brand p {
  margin: 0 0 0.4rem;
  color: rgba(245, 247, 250, 0.85);
}

.footer-brand strong {
  color: #fff;
  font-size: 1.1rem;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
}

.footer-nav a {
  color: rgba(245, 247, 250, 0.82);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
  text-decoration: none;
}

.footer-nav a::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: var(--c-primary-light);
  vertical-align: middle;
  opacity: 0.7;
}

.copyright {
  margin: 0;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(245, 247, 250, 0.15);
  font-size: 0.82rem;
  color: rgba(245, 247, 250, 0.6);
  text-align: center;
}

/* ============ Back to top ============ */
.back-to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(14px, 3vw, 30px);
  z-index: 90;
  padding: 0.7rem 1.1rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(230, 57, 70, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), box-shadow var(--transition);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(230, 57, 70, 0.6);
}

/* ============ Scroll reveal ============ */
.js-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js-reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============ Responsive ============ */
@media (max-width: 1080px) {
  .main-nav a {
    padding: 0.35rem 0.55rem;
    font-size: 0.84rem;
  }
  .site-search input {
    width: 120px;
  }
}

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: inline-block;
  }
  .header-inner {
    gap: 0.8rem;
  }
  .brand {
    flex: 1 1 auto;
  }
  .brand-slogan {
    display: none;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 15px;
  }
  .header-inner {
    padding: 0.6rem var(--gutter);
  }
  .brand-name {
    font-size: 1.15rem;
  }
  .brand svg {
    width: 36px;
    height: 36px;
  }
  .site-search {
    order: 3;
    flex: 1 1 100%;
    margin-top: 0.2rem;
  }
  .site-search input {
    width: 100%;
    flex: 1 1 auto;
  }
  .header-tools {
    flex: 1 1 auto;
    justify-content: flex-end;
  }
  .theme-toggle,
  .menu-toggle {
    padding: 0.4rem 0.75rem;
    font-size: 0.78rem;
  }
  main > section {
    margin-top: 1.6rem;
    padding: 1.1rem;
    border-radius: var(--radius-md);
  }
  .hero {
    padding: 1.4rem 1.1rem !important;
  }
  .hero-actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-carousel {
    grid-template-columns: 1fr;
  }
  .carousel-controls {
    justify-content: center;
  }
  .footer-inner {
    padding: 1.8rem var(--gutter) 1.2rem;
    text-align: center;
  }
  .footer-nav ul {
    justify-content: center;
  }
  .back-to-top {
    padding: 0.6rem 0.9rem;
    font-size: 0.75rem;
  }
}

@media (max-width: 420px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }
  h1 {
    font-size: 1.55rem;
  }
  h2 {
    font-size: 1.25rem;
  }
  .breadcrumb ol {
    font-size: 0.75rem;
  }
}

@media print {
  .site-header,
  .mobile-nav,
  .back-to-top,
  .hero-carousel,
  .carousel-controls,
  .site-search,
  .theme-toggle,
  .menu-toggle {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}