/* =====================================================
   CardNav v3 — 标题居中 + 版本行居中 + 分隔线
   ===================================================== */

/* 导航容器：居中浮动在页面顶部 */
.card-nav-container {
  position: fixed;
  top: 1.5em;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  max-width: 500px;
  z-index: 999;
  box-sizing: border-box;
}

/* 导航主体 */
.card-nav {
  display: block;
  height: 56px;
  background-color: #ffffff;
  border: 0.5px solid rgba(0, 0, 0, 0.08);
  border-radius: 0.85rem;
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.06),
    0 1px 3px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
  will-change: height;
}

/* 顶部工具栏（始终可见） */
.card-nav-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1rem;
  z-index: 2;
  background: #fff;
  border-radius: 0.85rem 0.85rem 0 0;
}

/* ── 中间标题 ── */
.logo-container {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

/* ── 右侧汉堡菜单（仅两道杠）── */
.hamburger-menu {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 12px 14px;
  border-radius: 10px;
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.hamburger-menu:hover {
  background: rgba(0,0,0,0.04);
}

.hamburger-lines {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 22px;
  height: 22px;
}

.hamburger-line {
  width: 22px;
  height: 2px;
  background-color: #333;
  border-radius: 2px;
  transition:
    transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 0.2s ease;
  transform-origin: 50% 50%;
}

.hamburger-menu.open .hamburger-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.hamburger-menu.open .hamburger-line:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ── 展开内容区 ── */
.card-nav-content {
  position: absolute;
  left: 0;
  right: 0;
  top: 56px;
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 1;
  background: #fff;
  border-radius: 0 0 0.85rem 0.85rem;
}

.card-nav.open .card-nav-content {
  visibility: visible;
  pointer-events: auto;
}

/* ── 版本行：名字居中 ── */
.version-row {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  user-select: none;
  transition: background 0.18s ease, transform 0.12s ease;
  color: #333;
}

.version-row:hover {
  background: rgba(0,0,0,0.04);
}

.version-row:active {
  transform: scale(0.985);
}

.version-name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-align: center;
}

/* 选中态：淡粉色底色 + 粉色文字 */
.version-row.selected {
  background: rgba(255, 105, 180, 0.12);
}

.version-row.selected .version-name {
  color: #e8458b;
}

/* ── 版本分隔线 ── */
.version-divider {
  height: 1px;
  margin: 0 14px;
  background: linear-gradient(
    to right,
    transparent,
    rgba(0,0,0,0.08) 20%,
    rgba(0,0,0,0.08) 80%,
    transparent
  );
}

/* ── 移动端适配 ── */
@media (max-width: 600px) {
  .card-nav-container {
    width: 94%;
    top: 1em;
  }

  .logo-text {
    font-size: 13px;
  }

  .version-name {
    font-size: 14px;
  }
}