/* ========== CSS Variables & Reset ========== */
:root {
  /* 主题色可由 assets/logo.png 采样覆盖 --accent-r/g/b */
  --accent-r: 20;
  --accent-g: 184;
  --accent-b: 166;
  --accent: rgb(var(--accent-r), var(--accent-g), var(--accent-b));
  --accent-light: color-mix(in srgb, var(--accent) 72%, white);
  --accent-glow: color-mix(in srgb, var(--accent) 58%, white);
  --primary-dark: #0a1628;
  --primary: #0f2044;
  --primary-light: #162d5a;
  --silver: #c8d0dc;
  --silver-light: #e2e8f0;
  --white: #ffffff;
  --text: #cbd5e1;
  --text-light: #94a3b8;
  --gradient-blue: linear-gradient(135deg, var(--accent) 0%, color-mix(in srgb, var(--accent) 35%, #38bdf8) 100%);
  --gradient-dark: linear-gradient(180deg, #0a1628 0%, #0f2044 100%);
  --shadow-blue: 0 0 30px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--primary-dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Animations ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2); }
  50% { box-shadow: 0 0 40px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.5); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes particleFloat {
  0% { transform: translate(0, 0) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translate(var(--tx), var(--ty)) rotate(360deg); opacity: 0; }
}

@keyframes borderGlow {
  0%, 100% { border-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2); }
  50% { border-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.6); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animate-left {
  transform: translateX(-30px);
}

.animate-on-scroll.animate-right {
  transform: translateX(30px);
}

.animate-on-scroll.animate-scale {
  transform: scale(0.9);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  height: 42px;
  width: auto;
  border-radius: 6px;
}

.nav-logo span {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--silver);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-dark);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.08) 0%, transparent 70%);
  animation: pulse 6s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.06) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite 2s;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-particles .particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-light);
  animation: particleFloat linear infinite;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 2;
  padding-top: 80px;
}

.hero-content {
  flex: 1;
  animation: fadeInLeft 1s ease forwards;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  animation: borderGlow 3s ease infinite;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease infinite;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-content h1 .highlight {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 520px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 12px;
  background: var(--gradient-blue);
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.5);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 12px;
  background: transparent;
  color: var(--silver-light);
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid rgba(200, 208, 220, 0.2);
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.05);
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight 1s ease forwards;
}

.hero-image-wrapper {
  position: relative;
  width: 480px;
  height: 400px;
}

.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 24px;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  animation: glow 4s ease-in-out infinite;
}

.hero-float-card {
  position: absolute;
  background: rgba(15, 32, 68, 0.9);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 16px 20px;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  animation: float 4s ease-in-out infinite;
}

.hero-float-card.card-1 {
  top: -20px;
  right: -30px;
  animation-delay: 0s;
}

.hero-float-card.card-2 {
  bottom: -20px;
  left: -30px;
  animation-delay: 1s;
}

.hero-float-card .card-icon {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.hero-float-card .card-label {
  font-size: 0.8rem;
  color: var(--text-light);
}

.hero-float-card .card-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
}

/* ========== Section Common ========== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 16px;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ========== Stats Section ========== */
.stats-section {
  background: var(--primary);
  border-top: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  border-bottom: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
}

/* ========== About Section ========== */
.about-section {
  background: var(--primary-dark);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
  transition: var(--transition);
}

.about-image:hover img {
  transform: scale(1.03);
}

.about-image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px;
  background: linear-gradient(transparent, rgba(10, 22, 40, 0.9));
}

.about-image-overlay span {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 8px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  color: var(--accent-light);
  font-weight: 600;
  font-size: 0.9rem;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
}

.about-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.about-content > p {
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.8;
  font-size: 1.02rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-feature {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-radius: 12px;
  background: rgba(15, 32, 68, 0.5);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  transition: var(--transition);
}

.about-feature:hover {
  border-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.05);
}

.about-feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.about-feature h4 {
  font-size: 0.95rem;
  color: var(--white);
  font-weight: 600;
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 0.82rem;
  color: var(--text-light);
}

/* ========== Products Section ========== */
.products-section {
  background: var(--primary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: rgba(10, 22, 40, 0.6);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
  box-shadow: var(--shadow-blue);
}

.product-card-image {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.08);
}

.product-card-image .product-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.8);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.product-card-body {
  padding: 24px;
}

.product-card-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.product-card-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.7;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.product-specs span {
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.08);
  color: var(--accent-light);
  font-size: 0.78rem;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-light);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.product-card-link:hover {
  gap: 10px;
  color: var(--white);
}

/* ========== Features/Advantages Section ========== */
.advantages-section {
  background: var(--primary-dark);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  padding: 36px 28px;
  border-radius: 16px;
  background: rgba(15, 32, 68, 0.4);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  transition: var(--transition);
  text-align: center;
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.05);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
  transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  transform: scale(1.1);
}

.advantage-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 80px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.06) 0%, transparent 70%);
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 2;
}

.cta-content h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ========== Footer ========== */
.footer {
  background: #060e1a;
  border-top: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.08);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 40px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-light);
  transition: var(--transition);
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
}

.footer-social a:hover {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column ul li a {
  font-size: 0.9rem;
  color: var(--text-light);
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--accent-light);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: var(--text-light);
}

.footer-contact li .contact-icon {
  color: var(--accent-light);
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.08);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-light);
}

.footer-bottom a {
  color: var(--accent-light);
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--white);
}

/* ========== Scroll to Top ========== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-blue);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 15px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
  border: none;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.5);
}

/* ========== Loading ========== */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image-wrapper {
    width: 380px;
    height: 320px;
  }

  .hero-logo-stage {
    width: 360px;
    height: 300px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 999;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1.2rem;
    padding: 12px 32px;
  }

  .mobile-toggle {
    display: flex;
    z-index: 1001;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-image-wrapper {
    width: 300px;
    height: 260px;
  }

  .hero-logo-stage {
    width: 300px;
    height: 260px;
  }

  .hero-orbit {
    width: 260px;
    height: 260px;
  }

  .hero-float-card { display: none; }

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

  .stat-number {
    font-size: 2rem;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .about-features {
    grid-template-columns: 1fr;
  }

  .section-header h2 {
    font-size: 1.8rem;
  }

  .section {
    padding: 60px 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn-primary, .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}

/* ========== 展新物联：Logo 主视觉与无图产品卡片 ========== */
.hero-logo-stage {
  position: relative;
  width: 420px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-orbit {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.25);
  animation: orbit-spin 22s linear infinite;
}

.hero-orbit::before {
  content: '';
  position: absolute;
  inset: -24px;
  border-radius: 50%;
  border: 1px dashed rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.15);
  animation: orbit-spin 32s linear infinite reverse;
}

@keyframes orbit-spin {
  to { transform: rotate(360deg); }
}

.hero-logo-stage .site-logo {
  position: relative;
  z-index: 2;
  width: 200px;
  height: auto;
  max-height: 200px;
  object-fit: contain;
  border-radius: 16px;
  filter: drop-shadow(0 12px 40px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.45));
  animation: logo-breathe 5s ease-in-out infinite;
}

@keyframes logo-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 75%);
  animation: grid-drift 20s linear infinite;
  pointer-events: none;
}

@keyframes grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 48px 48px, 48px 48px; }
}

.about-visual {
  position: relative;
  min-height: 400px;
  border-radius: 20px;
  border: 1px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
  background: radial-gradient(ellipse at 30% 20%, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.18), transparent 55%),
    linear-gradient(145deg, rgba(15, 32, 68, 0.9), rgba(10, 22, 40, 0.95));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-visual img {
  width: 72%;
  max-width: 280px;
  height: auto !important;
  min-height: 0;
  object-fit: contain;
  transition: var(--transition);
}

.about-visual:hover img {
  transform: scale(1.06);
}

.about-image.about-visual-wrap {
  overflow: visible;
}

.about-visual-wrap .about-image-overlay {
  background: linear-gradient(transparent, rgba(10, 22, 40, 0.92));
}

.product-card-visual {
  height: 220px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.12), rgba(10, 22, 40, 0.85));
}

.product-card-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 40%, rgba(255, 255, 255, 0.06) 50%, transparent 60%);
  background-size: 200% 100%;
  animation: shimmer 4s ease-in-out infinite;
}

.product-card-visual-inner {
  position: relative;
  z-index: 1;
  font-size: 3.5rem;
  line-height: 1;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.35));
  transition: transform 0.45s ease;
}

.product-card:hover .product-card-visual-inner {
  transform: scale(1.12) rotate(-3deg);
}

.stat-number.stat-static {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}