body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f5f6fa;
  margin: 0;
  padding: 0;
  color: #222;
}
.topbar {
  background: #111;
  color: #fff;
  font-size: 0.98rem;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topbar-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.topbar-left a {
  color: #ffd700;
  text-decoration: none;
  margin-right: 24px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.topbar-left a:last-child {
  color: #fff;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 24px;
}
.topbar-right a {
  color: #fff;
  text-decoration: none;
  font-weight: 400;
  font-size: 1rem;
}
.topbar-right .search {
  margin-left: 12px;
  font-size: 1.2rem;
  color: #fff;
  cursor: pointer;
}
.header {
  background: #111;
  padding: 0;
  border-bottom: 1px solid #e5e7eb;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
}
.site-title {
  font-size: 2.8rem;
  font-family: 'Georgia', serif;
  color: #fff;
  font-weight: bold;
  letter-spacing: 1px;
  text-decoration: none;
}
.mainnav {
  background: #e5e7eb;
  height: 44px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid #d1d5db;
}
.mainnav-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  padding: 0 24px;
}
.mainnav-link {
  color: #222;
  text-decoration: none;
  font-size: 1.08rem;
  font-weight: 500;
  margin-right: 32px;
  padding: 0 2px;
  transition: color 0.2s;
}
.mainnav-link:last-child {
  margin-right: 0;
}
.mainnav-link:hover {
  color: #2563eb;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 16px 0 16px;
}
.hero-row {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}
.hero-main {
  flex: 2;
  position: relative;
}
.hero-main img {
  width: 100%;
  height: 357px;
  object-fit: cover;
  border-radius: 8px;
}
.hero-main .hero-title {
  position: absolute;
  left: 32px;
  bottom: 100px;
  color: #fff;
  font-size: 2rem;
  font-weight: bold;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
  max-width: 80%;
  line-height: 1.2;
  background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.6));
  padding: 20px;
  border-radius: 8px;
  margin-right: 32px;
}
.hero-main .hero-desc {
  position: absolute;
  left: 32px;
  bottom: 32px;
  color: #fff;
  font-size: 1.1rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
  max-width: 80%;
  line-height: 1.4;
  background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.6));
  padding: 16px;
  border-radius: 8px;
  margin-right: 32px;
}
.hero-side {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 21px;
}
.hero-side-card {
  position: relative;
}
.hero-side-card img {
  width: 100%;
  height: 105px;
  object-fit: cover;
  border-radius: 8px;
  filter: brightness(0.85);
  display: block;
}
.hero-side-card .side-title {
  position: absolute;
  left: 20px;
  bottom: 18px;
  color: #fff;
  font-size: 1.15rem;
  font-weight: bold;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
.news-list {
  margin-top: 24px;
}
.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(30,41,59,0.06);
  padding: 28px 28px 20px 28px;
  margin-bottom: 28px;
  border: 1px solid #e5e7eb;
}
.card h2 {
  color: #1a2233;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.card .date {
  color: #64748b;
  font-size: 0.98rem;
  margin-bottom: 10px;
}
.card p {
  color: #374151;
  font-size: 1.08rem;
}
footer {
  background: #111;
  color: #cbd5e1;
  text-align: center;
  padding: 24px 0 16px 0;
  margin-top: 48px;
  font-size: 1rem;
  letter-spacing: 1px;
}
.btn {
  display: inline-block;
  background: linear-gradient(90deg,#2563eb 0%,#1fa2ff 100%);
  color: #fff;
  padding: 18px 48px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 800;
  margin-top: 16px;
  font-size: 1.35rem;
  letter-spacing: 1px;
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
  box-shadow: 0 4px 24px rgba(30,41,59,0.18), 0 1.5px 6px rgba(31,162,255,0.10);
  text-align: center;
}
.btn-gradient {
  background: linear-gradient(90deg,#2563eb 0%,#1fa2ff 100%);
}
.pulse {
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(31,162,255,0.4); }
  70% { box-shadow: 0 0 0 16px rgba(31,162,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(31,162,255,0); }
} 

/* 图片占位符样式 */
img {
  position: relative;
}

img::before {
  content: "图片加载中...";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, #f0f0f0 25%, transparent 25%), 
              linear-gradient(-45deg, #f0f0f0 25%, transparent 25%), 
              linear-gradient(45deg, transparent 75%, #f0f0f0 75%), 
              linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  font-size: 14px;
  text-align: center;
  border-radius: inherit;
}

/* 当图片加载失败时的样式 */
img[src*="images/"]:not([src*="panda-logo"]) {
  background: linear-gradient(45deg, #f8f9fa 25%, transparent 25%), 
              linear-gradient(-45deg, #f8f9fa 25%, transparent 25%), 
              linear-gradient(45deg, transparent 75%, #f8f9fa 75%), 
              linear-gradient(-45deg, transparent 75%, #f8f9fa 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  border: 2px solid #e9ecef;
  position: relative;
}

img[src*="images/"]:not([src*="panda-logo"])::after {
  content: "图片占位符";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.9);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: #6c757d;
  font-weight: 500;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 促销卡片中的图片占位符 */
.promo-img[src*="images/"]:not([src*="panda-logo"]) {
  background: linear-gradient(45deg, #f8f9fa 25%, transparent 25%), 
              linear-gradient(-45deg, #f8f9fa 25%, transparent 25%), 
              linear-gradient(45deg, transparent 75%, #f8f9fa 75%), 
              linear-gradient(-45deg, transparent 75%, #f8f9fa 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  border: 2px solid #e9ecef;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.promo-img[src*="images/"]:not([src*="panda-logo"])::after {
  content: "产品图片";
  background: rgba(255, 255, 255, 0.9);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 11px;
  color: #6c757d;
  font-weight: 500;
}

/* 图标占位符 */
.promo-badges img[src*="images/"]:not([src*="panda-logo"]) {
  background: #e9ecef;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.promo-badges img[src*="images/"]:not([src*="panda-logo"])::after {
  content: "图标";
  font-size: 10px;
  color: #6c757d;
  font-weight: 500;
}