:root {
  --color-bg: #f7f5f2;
  --color-bg-alt: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.72);
  --color-surface-solid: #ffffff;
  --color-text: #1a1a2e;
  --color-text-soft: #4a4a5e;
  --color-text-muted: #7a7a8e;
  --color-primary: #e94560;
  --color-primary-dark: #c5304a;
  --color-accent: #f5a623;
  --color-accent-soft: #ffd88a;
  --color-deep: #1a1a2e;
  --color-deep-2: #16213e;
  --color-deep-3: #0f3460;
  --color-border: rgba(26, 26, 46, 0.1);
  --color-border-strong: rgba(26, 26, 46, 0.18);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 18px 48px rgba(26, 26, 46, 0.16);
  --shadow-glow: 0 0 0 4px rgba(233, 69, 96, 0.15);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 45%, #0f3460 100%);
  --gradient-primary: linear-gradient(135deg, #e94560 0%, #f5a623 100%);
  --gradient-accent: linear-gradient(135deg, #f5a623 0%, #e94560 100%);
  --gradient-soft: linear-gradient(135deg, rgba(233, 69, 96, 0.08) 0%, rgba(245, 166, 35, 0.08) 100%);
}

html[data-theme="dark"],
html.dark-mode {
  --color-bg: #0e0e1a;
  --color-bg-alt: #15152a;
  --color-surface: rgba(26, 26, 46, 0.72);
  --color-surface-solid: #1a1a2e;
  --color-text: #ececf4;
  --color-text-soft: #b8b8cc;
  --color-text-muted: #8888a0;
  --color-primary: #ff5f7a;
  --color-primary-dark: #e94560;
  --color-accent: #ffb84d;
  --color-accent-soft: #5c4420;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-strong: rgba(255, 255, 255, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
  --gradient-hero: linear-gradient(135deg, #0e0e1a 0%, #1a1a2e 50%, #16213e 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255, 95, 122, 0.1) 0%, rgba(255, 184, 77, 0.1) 100%);
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(233, 69, 96, 0.06) 0%, transparent 32%),
    radial-gradient(circle at 88% 4%, rgba(245, 166, 35, 0.07) 0%, transparent 30%),
    radial-gradient(circle at 50% 100%, rgba(15, 52, 96, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

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

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 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.5rem); }

p {
  margin: 0 0 1.1em;
  color: var(--color-text-soft);
}

ul, ol {
  margin: 0 0 1.1em;
  padding-left: 1.4em;
  color: var(--color-text-soft);
}

li {
  margin-bottom: 0.4em;
}

blockquote {
  margin: 1.2em 0;
  padding: 1.1em 1.4em;
  border-left: 4px solid var(--color-primary);
  background: var(--gradient-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

time {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

address {
  font-style: normal;
}

.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);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-text);
  font-family: var(--font-serif);
  font-weight: 700;
}

.brand svg {
  border-radius: 8px;
  transition: transform var(--transition);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.06);
}

.brand-name {
  font-size: 1.25rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  letter-spacing: 0.04em;
}

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

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

#main-nav a {
  display: inline-block;
  padding: 6px 12px;
  font-size: 0.88rem;
  color: var(--color-text-soft);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
  white-space: nowrap;
}

#main-nav a:hover,
#main-nav a:focus-visible {
  color: var(--color-primary);
  background: var(--gradient-soft);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.search-form {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px 14px;
  transition: all var(--transition);
}

.search-form:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.search-form input {
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--color-text);
  width: 150px;
  padding: 4px 0;
  outline: none;
}

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

.search-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.search-form button:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 14px rgba(233, 69, 96, 0.4);
}

#theme-toggle,
#mobile-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 1.05rem;
  cursor: pointer;
  transition: all var(--transition);
}

#theme-toggle:hover,
#mobile-menu-toggle:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

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

/* ============ HERO ============ */
.hero {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) clamp(16px, 3vw, 32px);
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  opacity: 0.04;
  z-index: -1;
}

.hero-slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-deep);
  aspect-ratio: 1200 / 320;
  isolation: isolate;
}

.hero-slider::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.18) 0%, transparent 55%, rgba(245, 166, 35, 0.16) 100%);
  pointer-events: none;
  z-index: 2;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  animation: slideZoom 8s ease-in-out infinite alternate;
}

.slide svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@keyframes slideZoom {
  from { transform: scale(1); }
  to { transform: scale(1.04); }
}

.slider-controls {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.slider-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition);
}

.slider-dot.active {
  width: 26px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 12px rgba(245, 166, 35, 0.7);
}

.slider-dot:hover {
  background: rgba(255, 255, 255, 0.8);
}

.hero-text h1 {
  margin-top: 0;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-text p {
  font-size: 0.98rem;
  line-height: 1.85;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 28px;
  padding: 18px;
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}

.stat .num {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.2;
}

.stat .label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

/* ============ BREADCRUMB ============ */
#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px) 8px;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  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-text-soft);
}

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

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

/* ============ ANCHOR NAV ============ */
#anchor-nav {
  position: sticky;
  top: var(--header-height);
  z-index: 900;
  max-width: var(--max-width);
  margin: 8px auto 0;
  padding: 0 clamp(16px, 3vw, 32px);
}

#anchor-nav ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 10px 12px;
  overflow-x: auto;
  scrollbar-width: none;
  background: var(--color-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

#anchor-nav ul::-webkit-scrollbar {
  display: none;
}

#anchor-nav a {
  display: inline-block;
  padding: 5px 14px;
  font-size: 0.82rem;
  color: var(--color-text-soft);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: all var(--transition);
}

#anchor-nav a:hover {
  color: #fff;
  background: var(--gradient-primary);
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
}

/* ============ MAIN SECTIONS ============ */
main > section:not(.hero) {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) clamp(16px, 3vw, 32px);
}

main > section:not(.hero):not(#breadcrumb):not(#anchor-nav) {
  scroll-margin-top: calc(var(--header-height) + 70px);
}

main > section > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 24px;
}

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

main > section > h3 {
  margin-top: 32px;
  color: var(--color-text);
}

main > section > h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 1em;
  margin-right: 10px;
  vertical-align: -0.12em;
  border-radius: 3px;
  background: var(--gradient-accent);
}

/* ============ CARDS ============ */
#brand-intro,
#history,
#culture,
#products,
#advantages,
#solutions,
#applications,
#cases,
#reviews,
#knowledge,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  position: relative;
}

#brand-intro p,
#history p,
#culture p {
  max-width: 78ch;
}

#products h3,
#advantages h3,
#solutions h3,
#applications h3,
#cases h3,
#knowledge h3,
#howto h3 {
  padding: 14px 18px;
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#products h3:hover,
#advantages h3:hover,
#solutions h3:hover,
#applications h3:hover,
#cases h3:hover,
#knowledge h3:hover,
#howto h3:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-accent);
}

#products h3::before,
#advantages h3::before,
#solutions h3::before,
#applications h3::before,
#cases h3::before,
#knowledge h3::before,
#howto h3::before {
  display: none;
}

/* ============ NEWS ============ */
#news article {
  position: relative;
  padding: 20px 22px;
  margin-bottom: 16px;
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

#news article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

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

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

#news article h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
}

#news article p:last-child {
  margin-bottom: 0;
}

/* ============ ARTICLES ============ */
#articles {
  display: block;
}

#articles > article {
  position: relative;
  padding: 22px 24px;
  margin-bottom: 18px;
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#articles > article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.35);
}

#articles > article h3 {
  margin: 0 0 8px;
  font-size: 1.18rem;
  transition: color var(--transition);
}

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

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 7px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-primary);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(233, 69, 96, 0.28);
  transition: all var(--transition);
}

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

#articles > article a:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(233, 69, 96, 0.4);
}

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

/* ============ REVIEWS ============ */
#reviews blockquote {
  position: relative;
  padding-left: 56px;
  transition: transform var(--transition), box-shadow var(--transition);
}

#reviews blockquote::before {
  content: "“";
  position: absolute;
  left: 16px;
  top: 4px;
  font-family: var(--font-serif);
  font-size: 3.2rem;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.35;
}

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

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

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-md);
}

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition), color var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--color-primary);
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  transition: all var(--transition);
}

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

#faq details[open] summary::after {
  content: "−";
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-50%) rotate(180deg);
}

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

#faq details p {
  margin: 0;
  padding: 4px 22px 20px;
  animation: fadeIn 0.4s ease;
}

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

/* ============ HOWTO ============ */
#howto {
  counter-reset: howto-step;
}

#howto h3 {
  counter-increment: howto-step;
}

#howto h3::after {
  content: "0" counter(howto-step);
  float: right;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-accent);
  opacity: 0.7;
}

/* ============ CONTACT ============ */
#contact address {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0 28px;
  padding: 24px;
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

#contact address p {
  margin: 0;
  padding: 12px 14px;
  font-size: 0.9rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), border-color var(--transition);
}

#contact address p:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
}

#contact address a {
  font-weight: 600;
}

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

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.86rem;
  color: var(--color-text-soft);
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(233, 69, 96, 0.3);
}

/* ============ LEGAL ============ */
#legal {
  background: var(--gradient-soft);
  border-radius: var(--radius-lg);
}

/* ============ FOOTER ============ */
#site-footer {
  margin-top: 40px;
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

#site-footer::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 56px) clamp(16px, 3vw, 32px) 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: clamp(24px, 4vw, 48px);
}

.footer-brand p {
  margin: 0 0 8px;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

.footer-brand p strong {
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.1rem;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-nav a:hover {
  color: var(--color-accent);
  padding-left: 6px;
}

.footer-copy p {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

/* ============ BACK TO TOP ============ */
#back-to-top {
  position: fixed;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 1100;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: all var(--transition);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 12px 32px rgba(233, 69, 96, 0.55);
}

/* ============ SCROLL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@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; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1080px) {
  #main-nav a {
    padding: 6px 9px;
    font-size: 0.82rem;
  }
  .search-form input {
    width: 110px;
  }
}

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

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    background: var(--color-surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 12px 16px 20px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
  }

  #main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  #main-nav ul {
    flex-direction: column;
    gap: 2px;
  }

  #main-nav a {
    display: block;
    padding: 11px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

  #mobile-menu-toggle {
    display: inline-flex;
  }

  .search-form input {
    width: 120px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-slider {
    order: -1;
  }

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

  #anchor-nav {
    top: var(--header-height);
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  .header-inner {
    gap: 10px;
  }

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

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

  .search-form {
    display: none;
  }

  .hero {
    padding-top: 20px;
  }

  .hero-stats {
    padding: 14px;
    gap: 10px;
  }

  .stat .num {
    font-size: 1.25rem;
  }

  .stat .label {
    font-size: 0.68rem;
  }

  main > section:not(.hero) {
    padding-top: 32px;
    padding-bottom: 32px;
  }

  main > section > h2 {
    margin-bottom: 18px;
  }

  #products h3,
  #advantages h3,
  #solutions h3,
  #applications h3,
  #cases h3,
  #knowledge h3,
  #howto h3 {
    padding: 12px 14px;
    font-size: 1.02rem;
  }

  #news article,
  #articles > article {
    padding: 16px 16px;
  }

  #reviews blockquote {
    padding-left: 44px;
    padding-right: 16px;
  }

  #reviews blockquote::before {
    left: 10px;
    font-size: 2.4rem;
  }

  #faq summary {
    padding: 14px 48px 14px 16px;
    font-size: 0.92rem;
  }

  #faq details p {
    padding: 0 16px 16px;
  }

  #contact address {
    grid-template-columns: 1fr;
    padding: 16px;
  }

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

  #back-to-top {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }
}

@media (max-width: 380px) {
  .brand-name {
    display: none;
  }
  #anchor-nav a {
    font-size: 0.76rem;
    padding: 5px 11px;
  }
}

/* ============ PRINT ============ */
@media print {
  #site-header,
  #anchor-nav,
  #back-to-top,
  .slider-controls,
  #site-footer {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
  main > section {
    page-break-inside: avoid;
  }
}