:root {
  --brand: #c0392b;
  --brand-dark: #a93226;
  --brand-light: #e74c3c;
  --accent: #27ae60;
  --accent-light: #2ecc71;
  --accent-teal: #16a085;
  --bg: #fdf6f5;
  --bg-alt: #ffffff;
  --bg-soft: #fdf2f2;
  --text: #2c1a18;
  --text-secondary: #5d4037;
  --text-muted: #8d6e63;
  --border: rgba(192, 57, 43, 0.12);
  --shadow-sm: 0 2px 8px rgba(192, 57, 43, 0.08);
  --shadow-md: 0 8px 24px rgba(192, 57, 43, 0.12);
  --shadow-lg: 0 16px 48px rgba(192, 57, 43, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.5);
  --header-h: 68px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --brand: #e74c3c;
  --brand-dark: #c0392b;
  --brand-light: #ff6b5b;
  --accent: #2ecc71;
  --accent-light: #58d68d;
  --accent-teal: #1abc9c;
  --bg: #14100f;
  --bg-alt: #1e1817;
  --bg-soft: #251e1c;
  --text: #f5ebe9;
  --text-secondary: #d7c4bf;
  --text-muted: #a68b85;
  --border: rgba(231, 76, 60, 0.18);
  --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, 0.5);
  --glass-bg: rgba(30, 24, 23, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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-light);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.6rem;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  margin: 1.5rem 0 0.75rem;
}

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

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

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

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

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

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text);
  font-weight: 800;
}

.brand svg {
  transition: transform var(--transition);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.brand-name {
  font-size: 1.25rem;
  background: linear-gradient(120deg, var(--brand), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

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

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.main-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background-color var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

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

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

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

.site-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.15);
}

.site-search input {
  border: none;
  outline: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text);
  width: 180px;
  transition: width var(--transition);
}

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

.site-search input:focus {
  width: 220px;
}

.site-search button {
  border: none;
  cursor: pointer;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  transition: filter var(--transition);
}

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

#theme-toggle,
#menu-toggle {
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

.hero {
  position: relative;
  padding: 48px 24px 64px;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(192, 57, 43, 0.18), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(39, 174, 96, 0.16), transparent 55%),
    linear-gradient(135deg, var(--bg-soft) 0%, var(--bg) 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.22), rgba(39, 174, 96, 0.18));
  filter: blur(60px);
  pointer-events: none;
}

.hero-carousel {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  min-height: 320px;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 40px;
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(24px) scale(0.98);
  transition: opacity 0.6s ease, transform 0.6s ease, visibility 0.6s;
  pointer-events: none;
}

.hero-slide.is-active {
  position: relative;
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.hero-slide h1,
.hero-slide h2 {
  margin-bottom: 1rem;
}

.hero-slide h1::after,
.hero-slide h2::after {
  display: none;
}

.hero-slide p {
  max-width: 720px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.hero-cta {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 32px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--brand), var(--brand-light) 60%, var(--accent));
  background-size: 200% auto;
  box-shadow: 0 8px 20px rgba(192, 57, 43, 0.28);
  transition: background-position var(--transition), transform var(--transition), box-shadow var(--transition);
}

.hero-cta:hover {
  color: #fff;
  background-position: right center;
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(192, 57, 43, 0.38);
}

.carousel-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.carousel-nav button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text-secondary);
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-nav button:hover,
.carousel-nav button[aria-current="true"] {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-muted);
}

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

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

.anchor-nav {
  max-width: 1280px;
  margin: 24px auto 0;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  margin-left: 24px;
  margin-right: 24px;
}

.anchor-nav h2 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
}

.anchor-nav h2::after {
  width: 32px;
  height: 3px;
}

.anchor-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.anchor-nav a {
  display: block;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all var(--transition);
}

.anchor-nav a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

main > section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

main > section:nth-child(even) {
  position: relative;
}

main > section:nth-child(even)::before {
  content: "";
  position: absolute;
  inset: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  background: var(--bg-soft);
  border-radius: var(--radius-xl);
  z-index: -1;
}

main > section h2 {
  margin-top: 0;
}

#intro figure {
  margin: 32px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--bg-alt);
  transition: transform var(--transition), box-shadow var(--transition);
}

#intro figure:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

#intro figcaption {
  padding: 14px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  background: var(--bg-alt);
}

#advantages ul,
#howto ul,
#howto ol,
#sitemap ul,
#links ul {
  display: grid;
  gap: 12px;
}

#advantages ul {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

#advantages li {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

#advantages li strong {
  display: block;
  margin-bottom: 4px;
  color: var(--brand);
}

#products h3,
#solutions h3,
#knowledge h3,
#howto h3 {
  padding-left: 16px;
  border-left: 4px solid var(--brand);
  border-radius: 2px;
}

#cases article,
#news article,
#articles article {
  padding: 24px;
  margin-bottom: 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#cases article:hover,
#news article:hover,
#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand);
}

#cases h3,
#news h3,
#articles h3 {
  margin-top: 0;
}

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

#articles article {
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--brand), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

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

#reviews blockquote {
  position: relative;
  padding: 24px 28px 24px 56px;
  margin-bottom: 16px;
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-style: italic;
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition);
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  top: 12px;
  left: 20px;
  font-size: 3rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--brand);
  opacity: 0.5;
}

#reviews blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

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

#faq summary {
  padding: 16px 20px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background-color var(--transition), color var(--transition);
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 1.1rem;
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  transition: transform var(--transition);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: rotate(180deg);
}

#faq summary:hover {
  color: var(--brand);
  background: var(--bg-soft);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
}

#howto ol {
  counter-reset: step;
}

#howto ol li {
  position: relative;
  padding: 16px 20px 16px 60px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  counter-increment: step;
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--accent));
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

#howto ul li {
  position: relative;
  padding: 12px 18px 12px 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition);
}

#howto ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--brand), var(--accent));
}

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

#contact address {
  font-style: normal;
}

#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

#contact li {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

#sitemap ul,
#links ul {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

#sitemap a,
#links a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#trust,
#editor {
  border-radius: var(--radius-lg);
}

#trust {
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.06), rgba(39, 174, 96, 0.06));
}

footer {
  margin-top: 32px;
  background: linear-gradient(160deg, #2c1a18 0%, #1a100f 100%);
  color: #d7c4bf;
  padding: 56px 24px 32px;
}

[data-theme="dark"] footer {
  background: linear-gradient(160deg, #120d0c 0%, #0a0706 100%);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

footer h2 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

footer h2::after {
  width: 32px;
  height: 3px;
}

footer p,
footer li {
  font-size: 0.9rem;
  color: #b8a29c;
  line-height: 1.8;
}

footer ul {
  display: grid;
  gap: 6px;
}

footer a {
  color: #d7c4bf;
}

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

footer > section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 0 0;
}

footer > section h2 {
  font-size: 1rem;
}

footer > section p {
  max-width: 900px;
}

footer > section:last-child {
  padding-bottom: 8px;
}

footer > section:last-child p:last-child {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: #8d6e63;
  margin-bottom: 0;
}

#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: all var(--transition);
}

#back-to-top::before {
  content: "\2191";
  font-size: 1.25rem;
  font-weight: 700;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 20px 40px rgba(192, 57, 43, 0.4);
}

@media (max-width: 1024px) {
  .main-nav ul {
    gap: 0;
  }

  .main-nav a {
    padding: 8px 9px;
    font-size: 0.82rem;
  }

  .site-search input {
    width: 130px;
  }

  .site-search input:focus {
    width: 160px;
  }
}

@media (max-width: 860px) {
  :root {
    --header-h: 60px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand svg {
    width: 32px;
    height: 32px;
  }

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

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 16px;
  }

  .main-nav.is-open {
    max-height: 70vh;
    overflow-y: auto;
    padding: 12px 16px 20px;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow: visible;
  }

  .main-nav a {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

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

  .site-search {
    display: none;
  }

  .hero {
    padding: 32px 16px 48px;
  }

  .hero-slide {
    padding: 28px 22px;
    border-radius: var(--radius-lg);
  }

  .hero-carousel {
    min-height: 380px;
  }

  .hero-slide p {
    font-size: 0.95rem;
  }

  .anchor-nav {
    margin: 20px 16px 0;
    padding: 16px;
  }

  .anchor-nav ul {
    gap: 6px;
  }

  .anchor-nav a {
    font-size: 0.8rem;
    padding: 5px 12px;
  }

  main > section {
    padding: 36px 16px;
  }

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

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    gap: 8px;
  }

  #theme-toggle,
  #menu-toggle {
    padding: 7px 10px;
    font-size: 0.75rem;
  }

  .hero-carousel {
    min-height: 420px;
  }

  .hero-cta {
    padding: 10px 24px;
    font-size: 0.9rem;
  }

  .carousel-nav button {
    width: 34px;
    height: 34px;
  }

  #cases article,
  #news article,
  #articles article {
    padding: 18px;
  }

  #reviews blockquote {
    padding: 20px 20px 20px 48px;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  #howto ol li {
    padding: 14px 16px 14px 52px;
  }

  #howto ol li::before {
    left: 12px;
    width: 28px;
    height: 28px;
  }
}

@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;
  }

  main > section {
    opacity: 1;
    transform: none;
  }
}