/* 全局字体样式增强 */
body {
    font-size: 16px;
}

/* 导航栏样式增强 */
.navbar {
    padding: 6px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    overflow: visible;

}
.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 600;
    color: #3a66ff;
    letter-spacing: -0.5px;
}
.navbar-brand .brand-text {
    color: #333333;
    margin-left: 4px;
    font-size: 1.5rem;
}
.navbar-brand img {
    height: 36px;
    margin-right: 10px;
    transition: transform 0.3s ease;
}
.navbar-brand:hover img {
    transform: scale(1.05);
}
.navbar-nav {
    gap: 8px;
}
.navbar-nav .nav-link {
    font-size: 1.05rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s ease;
    color: #4a5568;
}
.navbar-nav .nav-link:hover {
    color: #3a66ff;
    background-color: rgba(58, 102, 255, 0.05);
}
.navbar-nav .nav-link.active {
    color: #3a66ff;
    background-color: rgba(58, 102, 255, 0.08);
    font-weight: 600;
}
.dropdown-menu {
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.08);
    padding: 8px 0;
}
.dropdown-item {
    padding: 8px 16px;
    font-weight: 500;
    transition: all 0.2s ease;
}
.dropdown-item:hover {
    background-color: rgba(58, 102, 255, 0.05);
    color: #3a66ff;
}
.theme-toggle {
    color: #4a5568;
    transition: all 0.2s ease;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle:hover {
    color: #3a66ff;
    background-color: rgba(58, 102, 255, 0.05);
}

.nav-mobile-actions {
    margin-left: 8px;
}

.nav-mobile-actions-inner {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-mobile-language .nav-link {
    display: flex;
    align-items: center;
}

/* 深色模式导航栏样式 */
[data-bs-theme="dark"] .navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
[data-bs-theme="dark"] .navbar-brand {
    color: #60a5fa;
}
[data-bs-theme="dark"] .navbar-brand .brand-text {
    color: #ffffff;
}
[data-bs-theme="dark"] .navbar-nav .nav-link {
    color: #e2e8f0;
}
[data-bs-theme="dark"] .navbar-nav .nav-link:hover {
    color: #60a5fa;
    background-color: rgba(96, 165, 250, 0.1);
}
[data-bs-theme="dark"] .navbar-nav .nav-link.active {
    color: #60a5fa;
    background-color: rgba(96, 165, 250, 0.15);
}
[data-bs-theme="dark"] .theme-toggle {
    color: #e2e8f0;
}
[data-bs-theme="dark"] .theme-toggle:hover {
    color: #60a5fa;
    background-color: rgba(96, 165, 250, 0.1);
}

h1, .h1 { font-size: 2.8rem; }
h2, .h2 { font-size: 2.2rem; }
h3, .h3 { font-size: 1.8rem; }
h4, .h4 { font-size: 1.4rem; }
p { font-size: 1.1rem; }
.btn { font-size: 1.05rem; font-weight: 500; }
.btn-lg { font-size: 1.2rem; }
.form-label { font-size: 1.1rem; font-weight: 500; }
.form-control, .form-select { font-size: 1.05rem; }

.custom-navbar-toggler {
    border: 0;
    padding: 0.25rem;
    position: relative;
    z-index: 1031;
}

.custom-navbar-toggler:focus,
.custom-navbar-toggler:focus-visible,
.custom-navbar-toggler:active {
    box-shadow: none;
    outline: none;
}

.custom-toggler-icon {
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: transform 0.25s ease;
}

.custom-toggler-line {
    position: absolute;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background-color: currentColor;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.custom-toggler-line:nth-child(1) { transform: translateY(-7px); }
.custom-toggler-line:nth-child(2) { transform: translateY(0); }
.custom-toggler-line:nth-child(3) { transform: translateY(7px); }

.custom-navbar-toggler[aria-expanded="true"] .custom-toggler-icon {
    transform: rotate(90deg);
}

.custom-navbar-toggler[aria-expanded="true"] .custom-toggler-line:nth-child(1) {
    transform: translateY(0) rotate(45deg);
}

.custom-navbar-toggler[aria-expanded="true"] .custom-toggler-line:nth-child(2) {
    opacity: 0;
}

.custom-navbar-toggler[aria-expanded="true"] .custom-toggler-line:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
}

.theme-icon-hidden {
    display: none;
}

@media (max-width: 991.98px) {
    .navbar .container {
        position: relative;
        overflow: visible;
    }

    .navbar-collapse {
        position: absolute;
        top: calc(100% + 10px);
        right: 12px;
        left: auto;
        width: min(200px, calc(100vw - 24px));
        max-width: calc(100vw - 24px);
        margin: 0;
        padding: 12px;
        background: var(--bs-body-bg, #fff);
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 14px;
        box-shadow: 0 14px 32px rgba(0, 0, 0, 0.12);
        z-index: 1085;
        display: block !important;
        visibility: hidden;
        opacity: 0;
        pointer-events: none;
        transform-origin: top right;
        transform: translateY(-10px) scaleY(0.92);
        transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
        will-change: opacity, transform;
    }

    .navbar-collapse.collapse:not(.show) {
        display: block !important;
        visibility: hidden;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px) scaleY(0.92);
    }

    .navbar-collapse.show {
        display: block !important;
        visibility: visible;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0) scaleY(1);
    }

    .navbar-nav {
        gap: 4px;
    }

    .navbar-nav > .nav-item {
        width: 100%;
    }

    .navbar-nav .nav-link {
        padding: 8px 12px;
        font-size: 0.98rem;
    }

    .navbar-nav .dropdown-menu {
        position: static;
        float: none;
        width: 100%;
        margin-top: 6px;
        box-shadow: none;
        border-radius: 10px;
    }

    .navbar-nav .dropdown-item {
        padding: 8px 12px;
    }

    .nav-mobile-actions {
        margin-left: 0;
        padding-top: 4px;
    }

    .nav-mobile-actions-inner {
        justify-content: flex-end;
    }

    .nav-mobile-language {
        flex: 1 1 auto;
        min-width: 0;
        position: relative;
    }

    .nav-mobile-language .nav-link {
        justify-content: flex-end;
    }

    .nav-mobile-actions .dropdown-menu {
        position: absolute;
        top: calc(100% + 6px);
        right: 0;
        left: auto;
        margin-top: 0;
        width: 100%;
        min-width: 100%;
        max-width: 100%;
        z-index: 1086;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }
}