/* ========== 全局重置 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #2c3e50;
  line-height: 1.7;
  background: #fff;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

:root {
  --primary: #1976D2;
  --primary-dark: #0D47A1;
  --primary-light: #42A5F5;
  --accent: #00ACC1;
  --text: #2c3e50;
  --text-light: #6c7a89;
  --bg-light: #f5f9ff;
  --bg-gray: #f7f9fc;
  --border: #e3eaf3;
  --white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(25, 118, 210, 0.08);
  --shadow-md: 0 4px 20px rgba(25, 118, 210, 0.12);
  --shadow-lg: 0 10px 40px rgba(25, 118, 210, 0.15);
  --radius: 8px;
  --transition: all 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 顶部导航栏 ========== */
.top-bar {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 8px 0;
}
.top-bar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.top-bar a:hover { color: var(--white); }
.top-info span { margin-right: 20px; }
.top-info i, .contact-link i { display: inline-block; margin-right: 6px; opacity: 0.85; }

/* SVG icon helpers */
.icon { width: 14px; height: 14px; vertical-align: -2px; fill: currentColor; }

.navbar {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  min-width: 44px; height: 44px;
  padding: 0 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 16px; letter-spacing: 1px;
  box-shadow: var(--shadow-sm);
}
.logo-text { display: flex; flex-direction: column; }
.logo-cn { font-size: 17px; font-weight: 700; color: var(--text); }
.logo-en { font-size: 11px; color: var(--text-light); letter-spacing: 0.5px; }

.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 4px;
  position: relative;
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a.active { color: var(--primary); }
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: var(--transition);
}

/* ========== Hero 区 ========== */
.hero {
  position: relative;
  min-height: 600px;
  background: linear-gradient(135deg, #0D47A1 0%, #1976D2 50%, #42A5F5 100%);
  color: white;
  overflow: hidden;
  display: flex; align-items: center;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(0,188,212,0.2) 0%, transparent 50%);
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
}
.hero-content { position: relative; z-index: 2; max-width: 720px; padding: 80px 0; }
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 24px;
  font-size: 13px;
  margin-bottom: 24px;
  letter-spacing: 1px;
  backdrop-filter: blur(10px);
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero h1 .accent { color: #4FC3F7; }
.hero p {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 36px;
  opacity: 0.95;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  letter-spacing: 0.5px;
}
.btn-primary {
  background: white;
  color: var(--primary-dark);
}
.btn-primary:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}
.btn-outline {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: white;
}

.btn-solid {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.btn-solid:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero-stats {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: grid;
  gap: 24px;
}
.stat-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 24px 32px;
  border-radius: 8px;
  min-width: 200px;
}
.stat-card .num {
  font-size: 36px;
  font-weight: 800;
  color: white;
  display: block;
  line-height: 1;
}
.stat-card .label {
  font-size: 13px;
  opacity: 0.85;
  margin-top: 8px;
  display: block;
}

@media (max-width: 1024px) {
  .hero-stats { display: none; }
}

/* ========== 通用 section ========== */
section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
  position: relative;
  padding: 0 30px;
}
.section-tag::before, .section-tag::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 20px; height: 1px;
  background: var(--primary);
}
.section-tag::before { left: 0; }
.section-tag::after { right: 0; }

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto;
}

/* ========== 优势区 ========== */
.features { background: var(--bg-gray); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: white;
  padding: 36px 28px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: white;
}
.feature-icon svg { width: 28px; height: 28px; }
.feature-card h3 { font-size: 18px; margin-bottom: 12px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ========== 产品区 ========== */
.product-tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 48px; }
.tab-btn {
  padding: 10px 24px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(25,118,210,0.3);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}
.product-img {
  height: 200px;
  background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-img::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at center, rgba(25,118,210,0.04), transparent);
}
.product-img svg { width: 120px; height: 120px; color: var(--primary); opacity: 0.85; }
.product-img img { max-width: 80%; max-height: 80%; object-fit: contain; position: relative; z-index: 1; }
.product-info { padding: 24px; }
.product-info h3 { font-size: 16px; margin-bottom: 10px; color: var(--text); }
.product-info .meta { font-size: 13px; color: var(--text-light); line-height: 1.8; }
.product-info .meta span { display: block; }
.product-info .meta b { color: var(--primary); font-weight: 600; }

.product-section { display: none; }
.product-section.active { display: grid; }

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

/* ========== 关于预览区 ========== */
.about-preview { background: white; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  position: relative;
  height: 420px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-image::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(0,188,212,0.3), transparent 50%);
}
.about-image-text {
  position: absolute;
  inset: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  color: white;
  text-align: center;
  padding: 30px;
  z-index: 2;
}
.about-image-text .big {
  font-size: 100px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -2px;
}
.about-image-text .sub {
  font-size: 16px;
  letter-spacing: 4px;
  opacity: 0.9;
}

.about-text h2 { font-size: 32px; margin-bottom: 20px; color: var(--text); }
.about-text .lead { font-size: 16px; color: var(--text-light); margin-bottom: 24px; line-height: 1.8; }
.about-list { margin-bottom: 32px; }
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 15px;
  color: var(--text);
}
.about-list li .check {
  flex-shrink: 0;
  width: 20px; height: 20px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  margin-top: 3px;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ========== CTA 区 ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1), transparent 50%);
}
.cta-content { position: relative; z-index: 2; }
.cta-section h2 { font-size: 36px; margin-bottom: 16px; font-weight: 700; }
.cta-section p { font-size: 16px; opacity: 0.9; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* ========== 页脚 ========== */
.footer {
  background: #0a2540;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer h4 {
  color: white;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer ul li { margin-bottom: 10px; font-size: 14px; }
.footer a:hover { color: var(--primary-light); }
.footer-about .logo { color: white; margin-bottom: 16px; }
.footer-about .logo-text .logo-cn { color: white; }
.footer-about p { font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.footer-contact .item { display: flex; gap: 10px; margin-bottom: 14px; font-size: 14px; line-height: 1.6; }
.footer-contact .item svg { flex-shrink: 0; color: var(--primary-light); margin-top: 4px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
}

/* ========== 内页 banner ========== */
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white;
  padding: 80px 0 70px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-banner-content { position: relative; z-index: 2; }
.page-banner h1 { font-size: 42px; font-weight: 700; margin-bottom: 12px; }
.page-banner .breadcrumb { font-size: 14px; opacity: 0.85; }
.page-banner .breadcrumb a:hover { text-decoration: underline; }

/* ========== 关于我们页面 ========== */
.intro-section { padding: 80px 0; }
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-text h2 { font-size: 32px; margin-bottom: 20px; }
.intro-text .lead { color: var(--text-light); font-size: 16px; margin-bottom: 20px; }
.intro-text p { margin-bottom: 14px; color: var(--text); }
.intro-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 32px; }
.intro-stats .s-card {
  background: var(--bg-light);
  border-left: 4px solid var(--primary);
  padding: 20px;
  border-radius: 4px;
}
.intro-stats .s-card .n { font-size: 32px; font-weight: 700; color: var(--primary-dark); }
.intro-stats .s-card .l { font-size: 13px; color: var(--text-light); margin-top: 4px; }

.vision-section { background: var(--bg-gray); }
.vision-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.vision-card {
  background: white;
  padding: 40px 30px;
  border-radius: 8px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.vision-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.vision-icon {
  width: 80px; height: 80px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  color: white;
}
.vision-icon svg { width: 36px; height: 36px; }
.vision-card h3 { font-size: 20px; margin-bottom: 12px; }
.vision-card p { color: var(--text-light); font-size: 14px; }

.timeline-section { padding: 80px 0; }
.timeline { position: relative; max-width: 800px; margin: 0 auto; padding-left: 40px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 12px; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -33px; top: 6px;
  width: 14px; height: 14px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--primary);
}
.timeline-year {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 4px 14px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}
.timeline-item h4 { font-size: 18px; margin-bottom: 8px; }
.timeline-item p { color: var(--text-light); font-size: 14px; }

/* ========== 产品详情页 ========== */
.products-section { padding: 60px 0 80px; }
.product-detail-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 32px;
  transition: var(--transition);
}
.product-detail-card:hover { box-shadow: var(--shadow-md); }
.product-detail-card .row {
  display: grid;
  grid-template-columns: 280px 1fr;
  align-items: stretch;
}
.product-detail-card .pic {
  background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
  display: flex; align-items: center; justify-content: center;
  padding: 30px;
  min-height: 220px;
}
.product-detail-card .pic svg { width: 140px; height: 140px; color: var(--primary); }
.product-detail-card .pic img { max-width: 90%; max-height: 220px; object-fit: contain; }
.product-detail-card .info { padding: 28px 32px; }
.product-detail-card .info h3 { font-size: 20px; color: var(--text); margin-bottom: 8px; }
.product-detail-card .info .sub-en { color: var(--text-light); font-size: 13px; margin-bottom: 14px; }
.product-detail-card .info p { color: var(--text); font-size: 14px; margin-bottom: 14px; line-height: 1.7; }
.product-detail-card .spec {
  background: var(--bg-light);
  border-left: 3px solid var(--primary);
  padding: 10px 16px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--text);
}
.product-detail-card .spec b { color: var(--primary); }

@media (max-width: 768px) {
  .product-detail-card .row { grid-template-columns: 1fr; }
  .vision-grid { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; }
}

/* ========== 联系我们 ========== */
.contact-section { padding: 80px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
}
.contact-info {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white;
  padding: 50px 40px;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}
.contact-info::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(0,188,212,0.3), transparent 50%);
}
.contact-info > * { position: relative; z-index: 2; }
.contact-info h2 { font-size: 28px; margin-bottom: 12px; }
.contact-info .lead { opacity: 0.9; margin-bottom: 36px; font-size: 14px; }
.contact-info .item { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-info .item .ic {
  width: 44px; height: 44px;
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
}
.contact-info .item .ic svg { width: 20px; height: 20px; }
.contact-info .item h4 { font-size: 14px; opacity: 0.85; margin-bottom: 4px; font-weight: 400; }
.contact-info .item p { font-size: 16px; line-height: 1.5; }

.contact-form {
  background: white;
  padding: 50px 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}
.contact-form h2 { font-size: 24px; margin-bottom: 8px; }
.contact-form .lead { color: var(--text-light); margin-bottom: 30px; font-size: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-group label .req { color: #e74c3c; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg-gray);
  color: var(--text);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(25,118,210,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.contact-form .btn { width: 100%; justify-content: center; }
.form-tip { font-size: 12px; color: var(--text-light); margin-top: 12px; text-align: center; }

.map-section { padding: 0 0 80px; }
.map-card {
  height: 380px;
  background: var(--bg-light);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  position: relative;
}
.map-card iframe { width: 100%; height: 100%; border: 0; }
.map-actions { text-align: center; margin-top: 24px; }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .top-bar .container { justify-content: center; text-align: center; }
  .top-info span { display: block; margin: 4px 0; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: white;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 0;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 24px; }
  .menu-toggle { display: block; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-title { font-size: 28px; }
  .page-banner h1 { font-size: 32px; }
  section { padding: 60px 0; }
}

@media (max-width: 600px) {
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}

/* ========== 滚动入场动画 ========== */
.reveal { opacity: 1; transform: translateY(0); transition: all 0.7s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }