/* ===== Hero Banner ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-gray-900);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0f0f0f 0%, #1a0505 50%, #2d0808 100%);
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 710px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(201,25,30,0.15);
  border: 1px solid rgba(201,25,30,0.3);
  color: #ff6b6e;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: var(--font-bold);
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-title span { color: var(--color-primary); }
.hero-desc {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: var(--text-xs);
  animation: bounce 2s infinite;
}
.hero-scroll::after {
  content: '';
  width: 1px; height: 40px;
  background: rgba(255,255,255,0.2);
}
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ===== 企业速览 ===== */
.stats { background: var(--color-primary); padding: 48px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 24px;
  border-right: 1px solid rgba(255,255,255,0.2);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 40px;
  font-weight: var(--font-bold);
  color: var(--color-white);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-number sup { font-size: 20px; }
.stat-label { font-size: var(--text-sm); color: rgba(255,255,255,0.8); }

/* ===== 企业标签 ===== */
.badges { background: var(--color-gray-50); padding: 40px 0; }
.badges-list {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.badge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  box-shadow: var(--shadow-sm);
}
.badge-icon {
  width: 36px; height: 36px;
  background: var(--color-primary-50);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 18px;
}
.badge-text { font-size: var(--text-sm); font-weight: var(--font-semibold); color: var(--color-gray-700); }

/* ===== 核心业务 ===== */
.business { background: var(--color-white); }
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.business-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 360px;
  cursor: pointer;
  group: true;
}
.business-card-bg {
  position: absolute;
  inset: 0;
  background: var(--color-gray-800);
  transition: transform var(--transition-slow);
}
.business-card-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.6;
  transition: opacity var(--transition-slow);
}
.business-card:hover .business-card-bg { transform: scale(1.05); }
.business-card:hover .business-card-bg img { opacity: 0.4; }
.business-card-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
}
.business-card-icon {
  width: 48px; height: 48px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
}
.business-card-title { font-size: var(--text-h3); font-weight: var(--font-bold); color: var(--color-white); margin-bottom: 8px; }
.business-card-desc { font-size: var(--text-sm); color: rgba(255,255,255,0.75); line-height: 1.6; margin-bottom: 20px; }
.business-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition-base);
}
.business-card:hover .business-card-link { opacity: 1; transform: translateY(0); }

/* ===== 核心产品 ===== */
.products { background: var(--color-gray-50); }
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.product-card-img {
  height: 200px;
  background: var(--color-gray-100);
  overflow: hidden;
}
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 20px; }
.product-card-title { font-size: var(--text-base); font-weight: var(--font-semibold); color: var(--color-gray-900); margin-bottom: 6px; }
.product-card-desc { font-size: var(--text-sm); color: var(--color-gray-500); line-height: 1.5; }

/* ===== 合作客户 ===== */
.clients { background: var(--color-white); }
.clients-track-wrap { overflow: hidden; }
.clients-track {
  display: flex;
  gap: 32px;
  animation: scroll-x 30s linear infinite;
}
.clients-track:hover { animation-play-state: paused; }
.client-logo {
  flex-shrink: 0;
  height: 60px;
  padding: 0 24px;
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-gray-500);
  white-space: nowrap;
}
@keyframes scroll-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== 联系栏 ===== */
.contact-bar { background: var(--color-gray-900); padding: 80px 0; }
.contact-bar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.contact-bar-title { font-size: var(--text-h2); font-weight: var(--font-bold); color: var(--color-white); margin-bottom: 16px; }
.contact-bar-desc { color: var(--color-gray-400); margin-bottom: 32px; }
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-info-item { display: flex; gap: 12px; align-items: flex-start; }
.contact-info-icon {
  width: 40px; height: 40px;
  background: rgba(201,25,30,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
  font-size: 18px;
}
.contact-info-text { color: var(--color-gray-300); font-size: var(--text-sm); line-height: 1.6; }
.contact-info-text strong { display: block; color: var(--color-white); font-size: var(--text-base); margin-bottom: 2px; }

/* 留言表单 */
.contact-form { background: var(--color-white); border-radius: var(--radius-xl); padding: 40px; }
.form-title { font-size: var(--text-h4); font-weight: var(--font-bold); color: var(--color-gray-900); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-label { font-size: var(--text-sm); font-weight: var(--font-medium); color: var(--color-gray-700); }
.form-input, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  color: var(--color-gray-800);
  transition: border-color var(--transition-fast);
  outline: none;
}
.form-input:focus, .form-textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(201,25,30,0.1); }
.form-textarea { height: 100px; resize: vertical; }

@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .business-grid { grid-template-columns: 1fr; }
  .business-card { height: 280px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-bar-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
}