:root {
  --orange: #E85D3F;
  --orange-dark: #BF360C;
  --orange-light: #FFF3E0;
  --green: #4CAF50;
  --pink: #C2185B;
  --pink-light: #FCE4EC;
  --blue: #1976D2;
  --blue-light: #E3F2FD;
  --bg: #FFFBF7;
  --bg-card: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-strong: rgba(255, 255, 255, 0.88);
  --text: #2B2118;
  --text-secondary: #6B5D52;
  --text-muted: #9A8B7E;
  --border: rgba(232, 93, 63, 0.14);
  --border-soft: rgba(43, 33, 24, 0.08);
  --shadow-sm: 0 2px 8px rgba(43, 33, 24, 0.06);
  --shadow-md: 0 8px 24px rgba(43, 33, 24, 0.08);
  --shadow-lg: 0 16px 48px rgba(43, 33, 24, 0.12);
  --shadow-glow: 0 8px 32px rgba(232, 93, 63, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-h: 68px;
  --transition: 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

html[data-theme="dark"] {
  --bg: #14100D;
  --bg-card: #1E1814;
  --bg-glass: rgba(30, 24, 20, 0.72);
  --bg-glass-strong: rgba(30, 24, 20, 0.9);
  --text: #F5EDE6;
  --text-secondary: #C4B5A8;
  --text-muted: #8A7A6D;
  --border: rgba(232, 93, 63, 0.24);
  --border-soft: rgba(245, 237, 230, 0.08);
  --orange-light: #2E1A12;
  --pink-light: #2A1420;
  --blue-light: #101C2E;
  --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);
  --shadow-glow: 0 8px 32px rgba(232, 93, 63, 0.3);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #14100D;
    --bg-card: #1E1814;
    --bg-glass: rgba(30, 24, 20, 0.72);
    --bg-glass-strong: rgba(30, 24, 20, 0.9);
    --text: #F5EDE6;
    --text-secondary: #C4B5A8;
    --text-muted: #8A7A6D;
    --border: rgba(232, 93, 63, 0.24);
    --border-soft: rgba(245, 237, 230, 0.08);
    --orange-light: #2E1A12;
    --pink-light: #2A1420;
    --blue-light: #101C2E;
    --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);
    --shadow-glow: 0 8px 32px rgba(232, 93, 63, 0.3);
  }
}

*,
*::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%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(232, 93, 63, 0.08), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(194, 24, 91, 0.06), transparent 38%),
    radial-gradient(circle at 50% 100%, rgba(25, 118, 210, 0.05), transparent 45%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(232, 93, 63, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

ul,
ol {
  list-style: none;
}

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

#siteHeader.scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--border);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

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

.brand:hover {
  transform: scale(1.03);
  color: var(--text);
}

.brand svg {
  filter: drop-shadow(0 4px 10px rgba(232, 93, 63, 0.35));
  transition: transform var(--transition);
}

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

.brand-name {
  font-size: 20px;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

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

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}

.main-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background 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(--orange), var(--pink));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.main-nav a:hover {
  color: var(--orange);
  background: rgba(232, 93, 63, 0.07);
}

.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(--bg-card);
  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(--orange);
  box-shadow: 0 0 0 4px rgba(232, 93, 63, 0.14);
}

.site-search input {
  border: none;
  background: transparent;
  padding: 9px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  width: 180px;
  outline: none;
  transition: width var(--transition);
}

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

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

.site-search button {
  border: none;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  padding: 9px 18px;
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition);
}

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

.site-search button:active {
  transform: scale(0.96);
}

#themeToggle,
#menuToggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 17px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

#themeToggle:hover,
#menuToggle:hover {
  transform: translateY(-2px) rotate(8deg);
  box-shadow: var(--shadow-glow);
}

#menuToggle {
  display: none;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-muted);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--text-secondary);
  font-weight: 600;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--orange);
  font-weight: 700;
}

/* ===== Main layout ===== */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

main > section {
  margin-top: 72px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

main > section:first-of-type {
  margin-top: 32px;
}

section > h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  color: var(--text);
}

section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: linear-gradient(180deg, var(--orange), var(--pink), var(--blue));
  box-shadow: 0 0 16px rgba(232, 93, 63, 0.5);
}

section > h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  margin: 32px 0 14px;
  color: var(--text);
  letter-spacing: -0.01em;
}

section > h3:first-of-type {
  margin-top: 0;
}

section > h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--orange-dark);
}

section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  max-width: 78ch;
}

section p:last-child {
  margin-bottom: 0;
}

section ul,
section ol {
  margin: 14px 0 20px;
  padding-left: 0;
  max-width: 78ch;
}

section ul li,
section ol li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 10px;
  color: var(--text-secondary);
  transition: transform var(--transition), color var(--transition);
}

section ul li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  box-shadow: 0 0 8px rgba(232, 93, 63, 0.5);
  transition: transform var(--transition);
}

section ul li:hover {
  transform: translateX(4px);
  color: var(--text);
}

section ul li:hover::before {
  transform: scale(1.35);
}

section ol {
  counter-reset: step;
}

section ol li {
  padding-left: 42px;
  counter-increment: step;
}

section ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  box-shadow: 0 4px 12px rgba(232, 93, 63, 0.35);
  transition: transform var(--transition);
}

section ol li:hover {
  transform: translateX(4px);
  color: var(--text);
}

section ol li:hover::before {
  transform: scale(1.12);
}

/* ===== Hero ===== */
#hero {
  position: relative;
  padding: 48px 40px 40px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(232, 93, 63, 0.14), rgba(194, 24, 91, 0.1) 45%, rgba(25, 118, 210, 0.1)),
    var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 93, 63, 0.28), transparent 68%);
  pointer-events: none;
  animation: floatOrb 12s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -120px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(25, 118, 210, 0.22), transparent 68%);
  pointer-events: none;
  animation: floatOrb 15s ease-in-out infinite reverse;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-24px, 28px) scale(1.08); }
}

#hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.7rem, 4.4vw, 2.9rem);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  background: linear-gradient(120deg, var(--orange-dark), var(--orange) 40%, var(--pink) 75%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-lead {
  position: relative;
  z-index: 1;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 68ch;
  margin-bottom: 32px;
}

/* ===== Banner Carousel ===== */
.hero-banner {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-soft);
  background: var(--bg-card);
}

.banner-slide {
  animation: slideFade 0.6s ease both;
}

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

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

.banner-slide p {
  margin: 0;
  padding: 16px 22px 20px;
  font-size: clamp(0.9rem, 1.5vw, 1.02rem);
  font-weight: 700;
  color: var(--text);
  background: linear-gradient(90deg, rgba(232, 93, 63, 0.1), rgba(194, 24, 91, 0.06), transparent);
  border-top: 1px solid var(--border-soft);
}

/* ===== Hero stats ===== */
.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 20px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: var(--orange);
}

.stat-num {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat-item span:last-child {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 600;
}

/* ===== Content cards for sections ===== */
#intro,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  padding: 40px 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

#intro:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover,
#legal:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

/* ===== Products highlight ===== */
#products {
  background:
    linear-gradient(160deg, rgba(232, 93, 63, 0.06), transparent 40%),
    var(--bg-card);
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  max-width: none;
}

#products ul li {
  padding: 16px 18px 16px 42px;
  margin-bottom: 0;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#products ul li::before {
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
}

#products ul li:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: var(--orange);
  background: var(--bg-glass-strong);
}

#products ul li:hover::before {
  transform: translateY(-50%) scale(1.4);
}

/* ===== Solutions list ===== */
#solutions ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  max-width: none;
}

#solutions ul li {
  padding: 14px 18px 14px 40px;
  margin-bottom: 0;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#solutions ul li::before {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

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

/* ===== Cases blockquotes ===== */
#cases blockquote {
  position: relative;
  margin: 18px 0;
  padding: 22px 26px 22px 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(232, 93, 63, 0.09), rgba(194, 24, 91, 0.05));
  border: 1px solid var(--border);
  border-left: 4px solid var(--orange);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 16px;
  top: 6px;
  font-size: 54px;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--orange);
  opacity: 0.55;
}

#cases blockquote p {
  margin: 0;
  font-size: 0.98rem;
  font-style: italic;
  color: var(--text-secondary);
}

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

/* ===== News ===== */
#news h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}

#news time,
#articles time {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

#news h3 + p {
  margin-top: 10px;
}

/* ===== Articles ===== */
#articles > article {
  padding: 22px 24px;
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#articles > article h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  color: var(--text);
  transition: color var(--transition);
}

#articles > article p {
  font-size: 0.94rem;
  margin-bottom: 12px;
}

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: 999px;
  color: var(--orange);
  background: rgba(232, 93, 63, 0.1);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

#articles > article a::after {
  content: "\2192";
  transition: transform var(--transition);
}

#articles > article a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

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

#articles > article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--orange);
  background: var(--bg-glass-strong);
}

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

#articles section {
  margin-top: 20px;
  padding: 24px 26px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  border-left: 4px solid var(--pink);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#articles section h4 {
  margin-top: 0;
  color: var(--pink);
}

#articles section:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ===== FAQ details ===== */
#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#faq details[open] {
  border-color: var(--orange);
  box-shadow: var(--shadow-md);
  background: var(--bg-glass-strong);
}

#faq summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 52px 16px 20px;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text);
  transition: color var(--transition), background var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  box-shadow: 0 4px 12px rgba(232, 93, 63, 0.35);
  transition: transform var(--transition), background var(--transition);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: translateY(-50%) rotate(180deg);
}

#faq summary:hover {
  color: var(--orange);
  background: rgba(232, 93, 63, 0.06);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-soft);
  padding-top: 14px;
  animation: fadeUp 0.4s ease both;
}

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

/* ===== HowTo ===== */
#howto {
  background:
    linear-gradient(160deg, rgba(25, 118, 210, 0.06), transparent 45%),
    var(--bg-card);
}

#howto ol {
  counter-reset: step;
  max-width: none;
}

#howto ol li {
  padding: 14px 18px 14px 52px;
  margin-bottom: 10px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  font-size: 13px;
}

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

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
}

#howto ul li {
  padding: 10px 16px 10px 38px;
  margin-bottom: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ul li::before {
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
}

#howto ul li:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

/* ===== Contact ===== */
#contact {
  background:
    linear-gradient(160deg, rgba(194, 24, 91, 0.06), transparent 45%),
    var(--bg-card);
}

#contact p {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact p:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
  border-color: var(--orange);
}

#contact ul li {
  padding: 10px 16px 10px 38px;
  margin-bottom: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition), box-shadow var(--transition);
}

#contact ul li::before {
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
}

#contact ul li:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

/* ===== Sitemap & Links ===== */
#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  max-width: none;
}

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

#sitemap ul li::before,
#links ul li::before {
  display: none;
}

#sitemap a,
#links a {
  display: block;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.93rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), color var(--transition), background var(--transition);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-4px);
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* ===== Legal ===== */
#legal {
  background:
    linear-gradient(160deg, rgba(43, 33, 24, 0.04), transparent 45%),
    var(--bg-card);
}

#legal p:last-of-type {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Footer ===== */
footer {
  position: relative;
  margin-top: 40px;
  padding: 48px 24px 36px;
  background: linear-gradient(180deg, transparent, rgba(232, 93, 63, 0.07));
  border-top: 1px solid var(--border-soft);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.footer-inner p {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.8;
}

.footer-inner p:first-child {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
}

.footer-inner a {
  color: var(--orange);
  font-weight: 600;
}

.footer-inner a:hover {
  color: var(--pink);
  text-decoration: underline;
}

/* ===== Back to top ===== */
#backToTop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), filter var(--transition);
}

#backToTop.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#backToTop:hover {
  filter: brightness(1.12);
  transform: translateY(-4px) scale(1.06);
}

#backToTop:active {
  transform: translateY(-2px) scale(0.96);
}

/* ===== Scroll reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* ===== Responsive ===== */
@media (max-width: 1080px) {
  .main-nav a {
    padding: 8px 9px;
    font-size: 13px;
  }

  .site-search input {
    width: 140px;
  }

  .site-search input:focus {
    width: 170px;
  }
}

@media (max-width: 900px) {
  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  #menuToggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: var(--bg-glass-strong);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-soft);
    transition: max-height 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow var(--transition);
    box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  }

  .main-nav.open {
    max-height: 480px;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px 20px;
  }

  .main-nav a {
    padding: 13px 16px;
    font-size: 15px;
    border-radius: var(--radius-sm);
  }

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

  .main-nav a:hover {
    background: rgba(232, 93, 63, 0.1);
  }

  .site-search input {
    width: 130px;
    font-size: 13px;
  }

  .site-search input:focus {
    width: 150px;
  }

  .site-search button {
    padding: 9px 13px;
    font-size: 12px;
  }

  main {
    padding: 0 16px 60px;
  }

  .breadcrumb {
    padding: 16px 16px 0;
  }

  #hero {
    padding: 32px 22px 28px;
    border-radius: var(--radius-lg);
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  #intro,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links,
  #legal {
    padding: 28px 20px;
    border-radius: var(--radius-md);
  }

  main > section {
    margin-top: 52px;
  }

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

  #articles section {
    padding: 20px 18px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .brand-name {
    font-size: 17px;
  }

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

  .site-search {
    display: none;
  }

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

  #hero {
    padding: 26px 18px 22px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 24px;
  }

  .stat-item {
    padding: 16px 8px;
  }

  .stat-item span:last-child {
    font-size: 11.5px;
  }

  .banner-slide p {
    padding: 12px 16px 16px;
    font-size: 0.86rem;
  }

  section > h2 {
    padding-left: 16px;
    margin-bottom: 18px;
  }

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

  #products ul,
  #solutions ul,
  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }

  #faq summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.93rem;
  }

  #faq summary::after {
    right: 14px;
    width: 24px;
    height: 24px;
    font-size: 16px;
  }

  #faq details p {
    padding: 12px 16px 16px;
    font-size: 0.9rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 48px;
    font-size: 0.93rem;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
    font-size: 12px;
  }

  #cases blockquote {
    padding: 18px 18px 18px 46px;
  }

  #cases blockquote::before {
    left: 12px;
    font-size: 44px;
  }

  #backToTop {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

  footer {
    padding: 36px 16px 28px;
  }

  .footer-inner p {
    font-size: 12.5px;
  }
}

@media (max-width: 400px) {
  .header-inner {
    padding: 0 12px;
    gap: 8px;
  }

  .brand-name {
    display: none;
  }

  main {
    padding: 0 12px 48px;
  }

  .breadcrumb {
    padding: 12px 12px 0;
  }

  #hero {
    padding: 22px 14px 18px;
  }

  #intro,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links,
  #legal {
    padding: 22px 14px;
  }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== Print ===== */
@media print {
  #siteHeader,
  #backToTop,
  .site-search,
  #themeToggle,
  #menuToggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  main > section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}