:root {
  --primary: #e94560;
  --primary-dark: #c73550;
  --primary-light: #ff6b81;
  --bg: #f5f6fa;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --bg-glass-border: rgba(255, 255, 255, 0.6);
  --text: #1a1a2e;
  --text-secondary: #4a4a68;
  --text-muted: #7a7a95;
  --border: rgba(26, 26, 46, 0.1);
  --shadow: 0 4px 24px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.12);
  --shadow-hover: 0 16px 48px rgba(233, 69, 96, 0.18);
  --nav-bg: rgba(255, 255, 255, 0.82);
  --header-height: 68px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 70%, #e94560 140%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #ff6b81 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0b0b14;
  --bg-alt: #12121f;
  --bg-card: rgba(26, 26, 46, 0.72);
  --bg-glass: rgba(18, 18, 31, 0.6);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text: #eaeaf2;
  --text-secondary: #b0b0c8;
  --text-muted: #7878a0;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 16px 48px rgba(233, 69, 96, 0.25);
  --nav-bg: rgba(11, 11, 20, 0.85);
  --gradient-card: linear-gradient(145deg, rgba(26,26,46,0.9) 0%, rgba(18,18,31,0.7) 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

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

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

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

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

ul,
ol {
  list-style: none;
}

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

input,
search {
  font-family: inherit;
}

/* ========== Header ========== */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: scale(1.08) rotate(-4deg);
}

.logo-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

#main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

#main-nav ul {
  display: flex;
  gap: 4px;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

#main-nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: transform var(--transition);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.06);
}

#main-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

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

#search-form {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.12);
}

#search-input {
  width: 180px;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
}

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

#search-form button {
  padding: 8px 16px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  transition: opacity var(--transition);
}

#search-form button:hover {
  opacity: 0.88;
}

#theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  transition: transform var(--transition), background var(--transition);
}

#theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
  background: rgba(233, 69, 96, 0.1);
}

#menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
}

/* ========== Main ========== */
main {
  padding-top: var(--header-height);
}

section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 24px;
}

section h2 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  position: relative;
  padding-left: 18px;
  line-height: 1.3;
}

section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 5px;
  border-radius: 3px;
  background: var(--gradient-accent);
}

section h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 28px 0 10px;
  color: var(--text);
  letter-spacing: -0.01em;
}

section h3:first-child {
  margin-top: 0;
}

section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.95rem;
}

/* ========== Hero ========== */
#hero {
  max-width: 100%;
  padding: 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(233, 69, 96, 0.35) 0%, transparent 45%),
    radial-gradient(circle at 15% 85%, rgba(15, 52, 96, 0.6) 0%, transparent 50%);
  pointer-events: none;
}

.banner-slider {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.banner-slide.active {
  opacity: 1;
  visibility: visible;
}

.banner-svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.banner-caption {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  padding: 0 32px;
  animation: fadeUp 0.8s ease both;
}

.banner-caption h2 {
  font-size: 2.6rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
  padding-left: 0;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.banner-caption h2::before {
  display: none;
}

.banner-caption p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 0;
}

.banner-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transition: all var(--transition);
}

.banner-dots button.active {
  width: 32px;
  border-radius: 6px;
  background: var(--primary);
}

.banner-dots button:hover {
  background: rgba(255, 255, 255, 0.7);
}

.hero-stats {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.14);
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.stat-number::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--primary);
}

.stat-item:nth-child(4) .stat-number::after {
  content: "";
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

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

#breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--text-muted);
  opacity: 0.5;
}

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

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

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

/* ========== Cards & Content ========== */
#brand-intro article,
#products article,
#advantages article,
#solutions article,
#industry article,
#cases article,
#knowledge article,
#privacy article,
#disclaimer article {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

#brand-intro article:hover,
#products article:hover,
#advantages article:hover,
#solutions article:hover {
  box-shadow: var(--shadow-lg);
}

/* ========== Testimonials ========== */
.testimonial-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.testimonial-list blockquote {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 28px 28px 20px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.testimonial-list blockquote::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 4rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.12;
  font-family: Georgia, serif;
}

.testimonial-list blockquote:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.testimonial-list blockquote p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 12px;
}

.testimonial-list blockquote footer {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ========== News ========== */
.news-list {
  display: grid;
  gap: 16px;
}

.news-list li {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 28px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.news-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.news-list li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.2);
}

.news-list li:hover::before {
  transform: scaleY(1);
}

.news-list time {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.02em;
  display: block;
  margin-bottom: 6px;
}

.news-list h3 {
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.news-list h3 a {
  color: var(--text);
}

.news-list h3 a:hover {
  color: var(--primary);
}

.news-list p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ========== Articles ========== */
#articles article {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 34px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

#articles article h3 {
  margin-top: 0;
  font-size: 1.15rem;
}

.article-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}

#articles article p {
  font-size: 0.92rem;
}

#articles article a {
  font-weight: 600;
  font-size: 0.88rem;
  display: inline-block;
  margin-top: 6px;
  transition: transform var(--transition);
}

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

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

#faq details:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.2);
}

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.3);
}

#faq summary {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  transition: color var(--transition), background var(--transition);
  position: relative;
}

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

#faq summary::before {
  content: "+";
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  transition: transform var(--transition);
}

#faq details[open] summary::before {
  content: "−";
  transform: rotate(180deg);
}

#faq summary:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.04);
}

#faq details p {
  padding: 0 24px 20px 60px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  animation: fadeUp 0.35s ease both;
}

/* ========== HowTo ========== */
#howto article {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow);
}

#howto ol {
  counter-reset: step;
  display: grid;
  gap: 14px;
  margin: 16px 0 24px;
}

#howto ol li {
  counter-increment: step;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(233, 69, 96, 0.04);
  border: 1px solid rgba(233, 69, 96, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition), background var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  background: rgba(233, 69, 96, 0.08);
}

#howto ol li::before {
  content: counter(step);
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
}

/* ========== Contact ========== */
#contact address {
  font-style: normal;
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow);
}

#contact address p {
  font-size: 0.92rem;
  margin-bottom: 8px;
  padding-left: 24px;
  position: relative;
}

#contact address p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
}

/* ========== Sitemap ========== */
#sitemap nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap nav a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
}

#sitemap nav a:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* ========== Links ========== */
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

#links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 6px 0;
  border-bottom: 1px dashed transparent;
  transition: color var(--transition), border-color var(--transition);
}

#links a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ========== Copyright ========== */
#copyright p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========== Footer ========== */
#site-footer {
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.75);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 90% 10%, rgba(233, 69, 96, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(15, 52, 96, 0.5) 0%, transparent 45%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.footer-nav a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition), transform var(--transition);
  display: inline-block;
}

.footer-nav a:hover {
  color: #fff;
  transform: translateX(3px);
}

.footer-contact p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer-bottom {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 6px;
}

/* ========== Back to Top ========== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 900;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 24px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  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(1.08);
  box-shadow: 0 10px 32px rgba(233, 69, 96, 0.55);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========== Responsive: Tablet ========== */
@media (max-width: 1024px) {
  #main-nav ul {
    gap: 0;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  #search-input {
    width: 130px;
  }

  .banner-caption h2 {
    font-size: 2.1rem;
  }

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

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

/* ========== Responsive: Mobile ========== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

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

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

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

  #main-nav ul {
    flex-direction: column;
    gap: 4px;
  }

  #main-nav a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

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

  #search-form {
    display: none;
  }

  #menu-toggle {
    display: flex;
  }

  section {
    padding: 40px 16px;
  }

  section h2 {
    font-size: 1.45rem;
    margin-bottom: 22px;
  }

  section h3 {
    font-size: 1.08rem;
  }

  .banner-slider {
    min-height: 360px;
  }

  .banner-caption {
    padding: 0 20px;
  }

  .banner-caption h2 {
    font-size: 1.65rem;
  }

  .banner-caption p {
    font-size: 0.9rem;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 0 16px 40px;
  }

  .stat-item {
    padding: 18px 12px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  #brand-intro article,
  #products article,
  #advantages article,
  #solutions article,
  #industry article,
  #cases article,
  #knowledge article,
  #privacy article,
  #disclaimer article,
  #howto article,
  #contact address {
    padding: 24px 20px;
  }

  .testimonial-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .news-list li {
    padding: 18px 20px;
  }

  #articles article {
    padding: 22px 20px;
  }

  #faq summary {
    padding: 16px 18px;
    font-size: 0.9rem;
  }

  #faq details p {
    padding: 0 18px 18px 52px;
    font-size: 0.86rem;
  }

  #howto ol li {
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 28px;
  }

  .footer-nav ul {
    gap: 10px 18px;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }
}

@media (max-width: 400px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stat-number {
    font-size: 1.3rem;
  }

  .banner-caption h2 {
    font-size: 1.4rem;
  }
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

/* ========== Print ========== */
@media print {
  #site-header,
  #back-to-top,
  #hero,
  #site-footer,
  .banner-dots {
    display: none;
  }

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

  section {
    padding: 20px 0;
  }
}