/* ============================================
   威智文化官网 - 科技风深蓝主题
   Primary: 蓝色渐变 #4DA6FF → #0055D4
   Accent:  橙黄渐变 #FFAA00 → #FF4500
   Background: 深蓝 hsl(222, 47%, 8%)
   ============================================ */

:root {
  --bg-deep: hsl(222, 47%, 8%);
  --bg-card: hsl(222, 47%, 12%);
  --bg-header: hsla(222, 47%, 6%, 0.95);
  --primary: #4DA6FF;
  --primary-dark: #0055D4;
  --primary-glow: rgba(77, 166, 255, 0.3);
  --accent: #FFAA00;
  --accent-dark: #FF4500;
  --accent-glow: rgba(255, 170, 0, 0.3);
  --text-primary: hsl(210, 40%, 95%);
  --text-secondary: hsl(217, 19%, 70%);
  --border-color: rgba(77, 166, 255, 0.15);
  --grid-color: rgba(77, 166, 255, 0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ============================================
   Header / 导航栏
   ============================================ */

.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo img {
  height: 40px;
  width: auto;
  border-radius: 6px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav a:hover,
.nav a.active {
  color: var(--primary);
  background: rgba(77, 166, 255, 0.08);
}

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  box-shadow: 0 0 8px var(--primary-glow);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: var(--transition);
}

/* ============================================
   Hero / Banner
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  opacity: 0.3;
  animation: pulseGlow 6s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.2; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.4; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(77, 166, 255, 0.1);
  transform: translateY(-2px);
}

/* ============================================
   Section / 通用板块
   ============================================ */

.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

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

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: rgba(77, 166, 255, 0.1);
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

/* ============================================
   Business Cards / 业务卡片
   ============================================ */

.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.business-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

.business-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 30px var(--primary-glow);
}

.business-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: rgba(77, 166, 255, 0.1);
  border: 1px solid var(--border-color);
}

.business-card:nth-child(2) .card-icon {
  background: rgba(255, 170, 0, 0.1);
}

.business-card:nth-child(3) .card-icon {
  background: rgba(77, 166, 255, 0.15);
}

.business-card:nth-child(4) .card-icon {
  background: rgba(255, 170, 0, 0.15);
}

.business-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.business-card ul {
  list-style: none;
  padding: 0;
}

.business-card li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
  position: relative;
  padding-left: 16px;
}

.business-card li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ============================================
   About Section
   ============================================ */

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

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--primary-glow);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ============================================
   Product Grid / 产品网格
   ============================================ */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 30px var(--primary-glow);
}

.product-image {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.product-info {
  padding: 28px;
}

.product-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.product-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.product-features {
  list-style: none;
  padding: 0;
  margin-bottom: 24px;
}

.product-features li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  position: relative;
  padding-left: 20px;
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}

.original-price {
  font-size: 1rem;
  color: var(--text-secondary);
  text-decoration: line-through;
}

.buy-btn {
  width: 100%;
  justify-content: center;
}

/* ============================================
   Payment Modal / 支付弹窗
   ============================================ */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  max-width: 480px;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-header {
  padding: 40px 32px 24px;
  text-align: center;
}

.alipay-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1677FF, #0958D9);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.alipay-icon svg {
  width: 32px;
  height: 32px;
  color: #fff;
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-body {
  padding: 0 32px 32px;
}

.order-info {
  background: var(--bg-deep);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}

.order-info p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
}

.order-info p:last-child {
  margin-bottom: 0;
}

.order-info strong {
  color: var(--text-primary);
}

.price-highlight {
  color: var(--accent);
  font-weight: 700;
}

.qr-placeholder {
  background: var(--bg-deep);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  margin-bottom: 20px;
}

.qr-placeholder svg {
  width: 80px;
  height: 80px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.qr-placeholder p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.qr-hint {
  font-size: 0.85rem !important;
  color: var(--text-secondary) !important;
  opacity: 0.7;
}

.payment-note {
  background: rgba(255, 170, 0, 0.1);
  border: 1px solid rgba(255, 170, 0, 0.2);
  border-radius: 12px;
  padding: 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Contact Section / 联系板块
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  transition: var(--transition);
}

.contact-item:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--primary-glow);
}

.contact-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: rgba(77, 166, 255, 0.1);
  border: 1px solid var(--border-color);
}

.contact-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-deep);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   Page Banner
   ============================================ */

.page-banner {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  opacity: 0.25;
  animation: pulseGlow 6s ease-in-out infinite;
}

.page-banner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.page-banner p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  position: relative;
}

/* ============================================
   Business Detail
   ============================================ */

.business-detail {
  padding: 20px 0;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-item {
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 14px;
}

.service-item:hover {
  border-color: var(--primary);
  color: var(--text-primary);
  box-shadow: 0 0 20px var(--primary-glow);
  transform: translateX(4px);
}

.service-dot {
  width: 8px;
  height: 8px;
  min-width: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

.cta-box {
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 50%, var(--primary-glow), transparent 50%),
              radial-gradient(circle at 70% 50%, var(--accent-glow), transparent 50%);
  opacity: 0.15;
  animation: pulseGlow 8s ease-in-out infinite;
}

.cta-box > * {
  position: relative;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--bg-header);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 48px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 4px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.icp-link {
  color: var(--text-secondary);
  transition: var(--transition);
}

.icp-link:hover {
  color: var(--primary);
}

/* ============================================
   Animations
   ============================================ */

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Products / 热销产品样式
   ============================================ */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 30px var(--primary-glow);
}

.product-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  z-index: 2;
}

.product-badge.hot {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
}

.product-image {
  height: 180px;
  background: linear-gradient(135deg, rgba(77, 166, 255, 0.08), rgba(255, 170, 0, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image svg {
  width: 64px;
  height: 64px;
  color: var(--primary);
}

.product-content {
  padding: 24px;
}

.product-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-features {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}

.product-features li {
  padding: 4px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 18px;
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}

.original-price {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: line-through;
}

.btn-pay {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: linear-gradient(135deg, #1677FF, #0055D4);
  color: #fff;
  transition: var(--transition);
}

.btn-pay:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(22, 119, 255, 0.3);
}

/* ============================================
   Products / 热销产品页
   ============================================ */

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3), 0 0 40px var(--primary-glow);
}

.product-card:hover::before {
  opacity: 1;
}

.product-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  letter-spacing: 1px;
}

.product-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: rgba(77, 166, 255, 0.1);
  border: 1px solid var(--border-color);
}

.product-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.product-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.product-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}

.product-features {
  list-style: none;
  padding: 0;
  margin-bottom: 24px;
}

.product-features li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  position: relative;
  padding-left: 20px;
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 20px;
}

.product-price .price {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-price .unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.product-btn {
  width: 100%;
  justify-content: center;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-header);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
  }

  .nav.open {
    transform: translateY(0);
  }

  .nav a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .about-content,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
  }

  .footer-links {
    gap: 32px;
  }

  .hero {
    min-height: auto;
    padding: 140px 24px 80px;
  }

  .section {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .business-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    flex-direction: column;
    gap: 24px;
  }
}

/* ============================================================
   案例墙 (作品案例:让审核员在站内体验服务成果)
   ============================================================ */
.case-hero {
  background: linear-gradient(135deg, rgba(77,166,255,0.10), transparent 60%);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 40px 28px;
  margin-bottom: 28px;
  position: relative; overflow: hidden;
}
.case-hero h2 { font-size: 1.5rem; margin-bottom: 10px; }
.case-hero p { color: var(--text-secondary); max-width: 780px; line-height: 1.8; }
.case-hero .play-demo {
  margin-top: 18px; display: inline-flex; align-items: center; gap: 8px;
  color: var(--primary); font-weight: 700; text-decoration: none;
}
.case-hero .play-demo:hover { text-decoration: underline; }
.case-hero .play-demo svg { width: 30px; height: 30px; fill: none; stroke: var(--primary); stroke-width: 1.8; }

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.case-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.case-cover {
  position: relative; aspect-ratio: 16 / 9; background: #0d1830; overflow: hidden;
}
.case-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.case-cover .case-play {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(6,14,32,0.35); color: #fff; opacity: 0; transition: var(--transition);
}
.case-card:hover .case-play { opacity: 1; }
.case-cover .case-play span {
  width: 54px; height: 54px; border-radius: 50%;
  background: rgba(77,166,255,0.92); display: flex; align-items: center; justify-content: center;
}
.case-cover .case-play svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.case-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.case-body .case-type {
  display: inline-flex; align-self: flex-start; font-size: 0.72rem; font-weight: 700;
  color: var(--primary); background: rgba(77,166,255,0.12);
  border: 1px solid rgba(77,166,255,0.25); padding: 3px 10px; border-radius: 20px;
  margin-bottom: 10px; letter-spacing: 0.5px;
}
.case-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
.case-body p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.case-body .case-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.case-body .case-tags span {
  font-size: 0.72rem; color: var(--text-secondary);
  background: rgba(77,166,255,0.06); border: 1px solid var(--border-color);
  padding: 2px 9px; border-radius: 14px;
}

/* 案例页视频演示区 */
.demo-section {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 16px; padding: 22px; margin-bottom: 24px;
}
.demo-section h3 { font-size: 1.05rem; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.demo-section h3 svg { width: 20px; height: 20px; stroke: var(--primary); fill: none; stroke-width: 1.8; }
.demo-player {
  position: relative; aspect-ratio: 16/9; border-radius: 12px; overflow: hidden;
  background: #000; border: 1px solid var(--border-color);
}
.demo-player video { width: 100%; height: 100%; display: block; object-fit: contain; background:#000; }
.demo-player .demo-fallback {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px; color: var(--text-secondary);
  font-size: 0.85rem; background: #0d1830; text-align:center; padding: 20px;
}
.demo-player .demo-fallback svg { width: 42px; height: 42px; stroke: var(--primary); fill: none; stroke-width: 1.5; }

/* ============================================================
   商品店: 货架卡片 / 分类 / 保障条 / 数量控件
   ============================================================ */
.shop-hero {
  padding: 132px 24px 48px;
  text-align: center; position: relative; overflow: hidden;
}
.shop-hero::before {
  content: ''; position: absolute; top: 42%; left: 50%;
  transform: translate(-50%,-50%);
  width: 860px; height: 860px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 68%);
  opacity: 0.5; pointer-events: none;
}
.shop-hero .container { position: relative; max-width: 980px; }
.shop-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; letter-spacing: 0.5px; }
.shop-hero p.lead { color: var(--text-secondary); max-width: 720px; margin: 0 auto 24px; font-size: 1.02rem; }
.shop-hero .hero-cta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.trust-line {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 26px;
  margin-top: 28px; font-size: 0.86rem; color: var(--text-secondary);
}
.trust-line span { display: inline-flex; align-items: center; gap: 7px; }
.trust-line svg { width: 15px; height: 15px; stroke: var(--accent); fill: none; stroke-width: 2; }

.cat-bar {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 10px;
  margin: 0 auto 32px; max-width: 1000px;
}
.cat-bar a {
  padding: 8px 18px; border-radius: 22px; font-size: 0.88rem; font-weight: 600;
  color: var(--text-secondary); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition); cursor: pointer; text-decoration: none;
}
.cat-bar a:hover, .cat-bar a.active { color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); border-color: transparent; }

.goods-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 20px;
}
.goods-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 16px; overflow: hidden;
  display: flex; flex-direction: column;
  transition: var(--transition); position: relative;
}
.goods-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.25); }
.goods-thumb { position: relative; aspect-ratio: 1 / 1; background: #fff; }
.goods-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.goods-tag {
  position: absolute; left: 12px; top: 12px;
  font-size: 0.72rem; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  padding: 3px 10px; border-radius: 20px; letter-spacing: 0.5px;
}
.goods-tag.blue { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.goods-body { padding: 15px 16px 16px; display: flex; flex-direction: column; flex: 1; }
.goods-cat {
  font-size: 0.72rem; color: var(--primary); letter-spacing: 1px; margin-bottom: 6px; font-weight: 600;
}
.goods-name { font-size: 1.02rem; font-weight: 700; margin-bottom: 6px; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.9em;}
.goods-sub { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 12px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.goods-foot { margin-top: auto; display: flex; align-items: flex-end; justify-content: space-between; gap: 8px; }
.goods-price { display: flex; flex-direction: column; }
.goods-price .now {
  font-size: 1.35rem; font-weight: 800; color: var(--accent);
  line-height: 1.1; font-family: inherit;
}
.goods-price .now small { font-size: 0.8rem; font-weight: 600; }
.goods-price .old { font-size: 0.75rem; color: var(--text-secondary); text-decoration: line-through; opacity: 0.8; }
.goods-sales { font-size: 0.72rem; color: var(--text-secondary); margin-top: 2px; }
.goods-btn {
  display: inline-flex; align-items: center; gap: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; font-size: 0.85rem; font-weight: 700;
  padding: 9px 16px; border-radius: 24px; text-decoration: none;
  transition: var(--transition); white-space: nowrap;
}
.goods-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px var(--accent-glow); }
.goods-btn.gray { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); box-shadow: none; }

.merch-bar {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px; margin-top: 8px;
}
.merch-item {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 14px; padding: 18px 16px;
  display: flex; align-items: center; gap: 14px;
}
.merch-item .ic {
  width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0;
  background: rgba(77,166,255,.12); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
}
.merch-item .ic.orange { background: rgba(255,170,0,.12); color: var(--accent); }
.merch-item .ic.green { background: rgba(7,193,96,.12); color: #07C160; }
.merch-item .ic.red { background: rgba(255,107,107,.12); color: #ff6b6b; }
.merch-item svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.merch-item h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 2px; }
.merch-item p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }

.goods-note {
  margin: 30px auto 0; max-width: 920px; padding: 14px 18px;
  border-radius: 12px; font-size: 0.85rem; line-height: 1.8; color: var(--text-secondary);
  background: rgba(255,170,0,.05); border: 1px solid rgba(255,170,0,.16);
}

/* 数量控件 */
.qty-ctl { display: inline-flex; align-items: center; border: 1px solid var(--border-color); border-radius: 10px; overflow: hidden; background: var(--bg-deep); }
.qty-ctl button {
  width: 34px; height: 34px; border: none; background: transparent;
  color: var(--text-primary); font-size: 1.05rem; cursor: pointer; line-height: 1;
}
.qty-ctl button:hover { background: rgba(77,166,255,.1); }
.qty-ctl input {
  width: 48px; height: 34px; border: none; border-left: 1px solid var(--border-color); border-right: 1px solid var(--border-color);
  background: transparent; color: var(--text-primary); text-align: center; font-size: 0.95rem; outline: none; -moz-appearance: textfield;
}
.qty-ctl input::-webkit-outer-spin-button, .qty-ctl input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

/* 商品店保障卡(首页售后简述) */
.shop-guarantee {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px;
}
.shop-guarantee .g-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 16px; padding: 24px 22px; transition: var(--transition);
}
.shop-guarantee .g-card:hover { border-color: var(--primary); transform: translateY(-3px); }
.shop-guarantee .g-card .gi {
  width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: rgba(77,166,255,.12); color: var(--primary); margin-bottom: 14px;
}
.shop-guarantee .g-card .gi svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.shop-guarantee .g-card h3 { font-size: 1rem; margin-bottom: 6px; }
.shop-guarantee .g-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.7; }

/* 商品页过滤隐藏 */
.goods-card.hide { display: none; }

/* ============================================
   Mall · 四步购物流程（首页）
   ============================================ */
.buy-steps-mall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  position: relative;
}
/* 卡片间的流程虚线，只在宽屏四列时显示 */
.buy-steps-mall::before {
  content: '';
  position: absolute;
  top: 57px;
  left: 7%;
  right: 7%;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(77,166,255,.38) 0 7px, transparent 7px 15px);
  pointer-events: none;
}
.buy-step-mall {
  position: relative;
  z-index: 1;
  background:
    radial-gradient(150px 96px at 50% 0%, rgba(77,166,255,.10), transparent 72%),
    var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 32px 22px 28px;
  text-align: center;
  overflow: hidden;
  transition: var(--transition);
}
.buy-step-mall::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 0 0 3px 3px;
  transition: width .4s ease;
}
.buy-step-mall:hover {
  transform: translateY(-6px);
  border-color: rgba(77,166,255,.42);
  box-shadow: 0 16px 38px rgba(0,0,0,.36);
}
.buy-step-mall:hover::before { width: 72%; }
.buy-step-mall .num {
  position: relative;
  width: 58px; height: 58px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.45rem; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, #4DA6FF, #0055D4);
  box-shadow: 0 8px 22px rgba(77,166,255,.28), inset 0 0 0 1px rgba(255,255,255,.14);
}
.buy-step-mall:nth-child(4) .num {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: 0 8px 22px rgba(255,170,0,.22), inset 0 0 0 1px rgba(255,255,255,.16);
}
.buy-step-mall .num::after {
  content: '';
  position: absolute; inset: 4px;
  border-radius: 50%;
  border: 1px dashed rgba(255,255,255,.38);
}
.buy-step-mall h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.buy-step-mall p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.75; margin: 0; }
/* 卡片内右下角幽灵序号 */
.buy-step-mall::after {
  content: '';
  position: absolute;
  right: 14px; bottom: 4px;
  font-size: 2.6rem; font-weight: 800; line-height: 1;
  color: rgba(255,255,255,.04);
  pointer-events: none;
  font-style: italic;
  letter-spacing: 1px;
}
.buy-step-mall:nth-child(1)::after { content: '01'; }
.buy-step-mall:nth-child(2)::after { content: '02'; }
.buy-step-mall:nth-child(3)::after { content: '03'; }
.buy-step-mall:nth-child(4)::after { content: '04'; }

@media (max-width: 1080px) {
  .buy-steps-mall { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .buy-steps-mall::before { display: none; }
}
@media (max-width: 560px) {
  .buy-steps-mall { grid-template-columns: 1fr; }
}

/* ============================================
   Mall · 页脚（合并居中版式）
   ============================================ */
.footer-merge {
  text-align: center;
  margin-bottom: 28px;
}
.footer-merge .f-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: .5px;
}
.footer-merge .f-logo img {
  height: 44px;
  width: auto;
  border-radius: 8px;
}
.f-slogan {
  margin: 14px auto 22px;
  max-width: 660px;
  font-size: .92rem;
  color: var(--text-secondary);
  line-height: 1.9;
}
.f-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 32px;
}
.f-nav a {
  position: relative;
  font-size: .93rem;
  color: var(--text-secondary);
  padding: 4px 2px;
  transition: var(--transition);
}
.f-nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform .3s ease;
}
.f-nav a:hover { color: var(--primary); }
.f-nav a:hover::after { transform: scaleX(1); }
/* 页脚单块整合：联系 / 版权信息区 */
.f-info {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: .85rem;
  color: var(--text-secondary);
  line-height: 2;
}
.f-info a {
  color: var(--text-secondary);
  transition: var(--transition);
}
.f-info a:hover { color: var(--primary); }