:root {
  --pointer-size: 40px;
  --pointer-color: #ffffff; /* 简约白色线条 */
  --pointer-border-width: 2px;
  --pointer-corner-length: 12px;
}

body {
  cursor: none; /* 全局隐藏系统鼠标指针 */
}

/* 鼠标中心的精准小白点 */
.magnetic-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 6px;
  height: 6px;
  background-color: var(--pointer-color);
  border-radius: 50%;
  margin-top: -3px; /* 居中对齐 */
  margin-left: -3px;
  pointer-events: none;
  z-index: 10000;
  will-change: transform;
}

.magnetic-pointer {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--pointer-size);
  height: var(--pointer-size);
  /* 使得中心点对齐鼠标 */
  margin-top: calc(var(--pointer-size) / -2);
  margin-left: calc(var(--pointer-size) / -2);
  pointer-events: none;
  z-index: 9999;
  /* 尺寸的平滑过渡效果 */
  transition: width 0.25s cubic-bezier(0.25, 1, 0.5, 1), 
              height 0.25s cubic-bezier(0.25, 1, 0.5, 1), 
              margin-top 0.25s cubic-bezier(0.25, 1, 0.5, 1), 
              margin-left 0.25s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: transform, width, height;
}

.magnetic-corners {
  width: 100%;
  height: 100%;
  position: relative;
  /* 初始时：缩小到鼠标中心点，并呈透明 */
  transform: scale(0.2);
  opacity: 0;
  transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.6s ease;
}

/* 主内容加载完毕 (.loaded) 后，四个角标记放大弹出 */
body.loaded .magnetic-corners {
  transform: scale(1);
  opacity: 1;
}

.magnetic-pointer.hidden,
.magnetic-dot.hidden {
  opacity: 0 !important;
}

.magnetic-corners-inner {
  width: 100%;
  height: 100%;
  position: relative;
  will-change: transform;
}

.magnetic-corners-inner div {
  position: absolute;
  width: var(--pointer-corner-length);
  height: var(--pointer-corner-length);
  border-color: var(--pointer-color);
  border-style: solid;
  border-width: 0;
  transition: all 0.2s ease;
}

/* 四个角 */
.magnetic-corners-inner div:nth-child(1) {
  top: 0;
  left: 0;
  border-top-width: var(--pointer-border-width);
  border-left-width: var(--pointer-border-width);
}

.magnetic-corners-inner div:nth-child(2) {
  top: 0;
  right: 0;
  border-top-width: var(--pointer-border-width);
  border-right-width: var(--pointer-border-width);
}

.magnetic-corners-inner div:nth-child(3) {
  bottom: 0;
  left: 0;
  border-bottom-width: var(--pointer-border-width);
  border-left-width: var(--pointer-border-width);
}

.magnetic-corners-inner div:nth-child(4) {
  bottom: 0;
  right: 0;
  border-bottom-width: var(--pointer-border-width);
  border-right-width: var(--pointer-border-width);
}