:root {
  --primary:   #2F5D62;
  --accent:    #B5838D;
  --light-bg:  #F0F2F5;
  --dark:      #333333;
}

/* 全局背景：细微网格纹理 */
body {
  background-color: var(--light-bg);
  background-image:
    radial-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,0.03) 1px, transparent 1px);
  background-position: 0 0, 10px 10px;
  background-size: 20px 20px;
  font-family: 'Open Sans', sans-serif;
}

/* 区块交替背景 */
section:nth-of-type(odd)  { background: #fff; }
section:nth-of-type(even) { background: var(--light-bg); }

/* 波浪分割 */
.wave-divider {
  position: relative;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  margin-bottom: -1px;
}
.wave-divider svg {
  display: block;
  width: 100%;
  height: 80px;
}
.wave-divider.top  { transform: rotate(180deg); }

/* 视差区块 */
.parallax {
  position: relative;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
}

/* 半透明叠层 */
.parallax::before {
  content: "";
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.2);
}

/* 飘浮装饰圆 */
@keyframes float {
  0%,100% { transform: translateY(0) }
  50%     { transform: translateY(-15px) }
}
.decor-circle {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
  pointer-events: none;
  z-index: 1;
}

/* 覆盖按钮颜色 */
.btn-primary {
  background: var(--accent);
  border: none;
}
.btn-primary:hover {
  filter: brightness(0.9);
}

/* 区块标题装饰 */
h3.section-title {
  font-family: 'Playfair Display', serif;
  color: var(--dark);
  border-left: 4px solid var(--accent);
  padding-left: .5rem;
  margin-bottom: 1rem;
}

/* Card Hover */
.section-card {
  transition: transform .3s, box-shadow .3s;
}
.section-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

/* 隐藏滚动条 */
.section-scroll::-webkit-scrollbar {
  display: none;
}