/* 移动端导航栏图标修复 */

/* 修复 navbar-toggler-icon 在移动端不显示的问题 */
.navbar-dark .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30' stroke='rgba(255,255,255,.8)' stroke-width='2'%3E%3Cline x1='4' y1='9' x2='26' y2='9'/%3E%3Cline x1='4' y1='15' x2='26' y2='15'/%3E%3Cline x1='4' y1='21' x2='26' y2='21'/%3E%3C/svg%3E");
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}

/* 确保 navbar-toggler 按钮可见 */
.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.5);
    padding: 0.25rem 0.75rem;
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.navbar-toggler:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

.navbar-toggler:hover {
    border-color: rgba(255, 255, 255, 0.8);
}