html, body {
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  overflow-x: hidden;
  touch-action: pan-y;
  overscroll-behavior: none;
  font-family: "Helvetica Neue", sans-serif;
  color: #111;
  box-sizing: border-box;
  background: linear-gradient(
    to bottom,
    #e5dff1,
    #ebeef5,
    #f4f9fc
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
}

/* ===== 内容可滚动区 ===== */
.scrollable {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  flex: 1;
  height: 100%;
  padding-bottom: 70px; /* 给底部悬浮卡片足够空间 */
}

/* ======= 底部导航栏悬浮卡片 ======= */
.bottom-nav {
  position: fixed;
  left: 0;            /* 直接靠左 */
  right: 0;           /* 直接靠右 */
  bottom: 0px;        /* 彻底贴底 */
  margin: 0;          /* 没有 auto，彻底无留白 */
  width: 100vw;       /* 全宽 */
  max-width: 100vw;   /* 超大屏无白边 */
  height: 58px;       /* 保持纤薄 */
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: rgba(255,255,255,0.19);
  backdrop-filter: blur(14px) saturate(170%);
  -webkit-backdrop-filter: blur(14px) saturate(170%);
  border-top: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px 10px 0 0;    /* 可适当缩小，避免视觉留白 */
  box-shadow: 0 1.5px 6px rgba(0,0,0,0.11);
  z-index: 100;
  transition: all 0.18s cubic-bezier(.5,1.4,.3,1);
  overflow: visible;
}

/* ===== 普通导航按钮 ===== */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 13px;
  color: rgba(30, 30, 30, 0.86);
  text-decoration: none;
  transition: color 0.3s;
  z-index: 2;
  position: relative;
}
.nav-item svg {
  width: 20px;
  height: 20px;
  fill: #2c54ce;
  opacity: 0.83;
  transition: fill 0.25s, opacity 0.25s;
}
.nav-item:hover svg,
.nav-item.active svg {
  fill: #007aff;
  opacity: 1;
}
.nav-item:hover,
.nav-item.active {
  color: #007aff;
}

/* ====== 中间悬浮交易按钮 ====== */
.trade-icon-wrapper {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -62%); /* 精准浮出导航栏上沿 */
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-user-select: none;
  user-select: none;
}
.trade-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #00ffc6, #0077ff);
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(0,255,198,0.16);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: transform 0.15s;
  border: 2.5px solid #fff;
}
.trade-icon:hover {
  transform: scale(1.10);
}
.trade-icon svg {
  width: 17px;
  height: 17px;
  fill: white;
}

/* ====== 响应式/移动端适配 ====== */
@media screen and (max-width: 480px) {
  .bottom-nav {
    width: 99vw;
    max-width: 100vw;
    height: 43px;
    border-radius: 10px 10px 10px 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.10);
    bottom: 1.2vw;
  }
  .trade-icon-wrapper {
    transform: translate(-50%, -69%);
  }
  .trade-icon {
    width: 28px;
    height: 28px;
    border-width: 2px;
  }
  .trade-icon svg {
    width: 13px;
    height: 13px;
  }
  .nav-item svg {
    width: 16px;
    height: 16px;
  }
}