/* 主题变量 */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #0f0f0f;
    --bg-card: #111111;
    
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #808080;
    
    --border-subtle: #1a1a1a;
    --border-default: #262626;
    
    --accent: #ffffff;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-card: #fafafa;
    
    --text-primary: #0a0a0a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #808080;
    
    --border-subtle: #e5e5e5;
    --border-default: #d0d0d0;
    
    --accent: #0a0a0a;
    
    /* 亮色模式下的彩色渐变 - 蓝紫色 */
    --gradient-border: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #9333ea 100%);
}

/* 暗色模式下的彩色渐变 - 蓝紫色 */
:root {
    --gradient-border: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #a855f7 100%);
}

/* 选中状态的彩色边框效果 */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 通用选中状态样式 - 彩色渐变边框（仅边框） */
.selected-border,
button.primary,
.tool-card:hover {
    position: relative;
}

.selected-border::before,
button.primary::before,
.tool-card:hover::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-border);
    background-size: 200% 200%;
    z-index: -1;
    animation: gradientShift 3s ease infinite;
    opacity: 1;
}

/* 按钮选中状态特殊处理 - 只显示边框渐变 */
button.primary {
    border: 2px solid transparent !important;
    background: var(--text-primary) !important;
    color: var(--bg-primary) !important;
    background-clip: padding-box;
}

button.primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-card);
    z-index: -1;
}

button.primary::before {
    border-radius: 0;
}

/* 工具卡片hover效果 - 只显示边框渐变 */
.tool-card {
    position: relative;
    overflow: visible;
}

.tool-card:hover {
    border: 2px solid transparent !important;
    background-clip: padding-box;
}

.tool-card:hover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-card);
    z-index: -1;
}

.tool-card:hover::before {
    border-radius: 0;
}

/* 公共导航栏和页脚样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0 80px;
    z-index: 1000;
    height: 60px;
    min-height: 60px;
    max-height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-sizing: border-box;
}

.navbar > div {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
    min-width: 0;
}

.navbar-brand {
    font-size: 1.375rem;
    font-weight: 400;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    height: 24px;
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-primary);
    padding: 0;
    border-radius: 0;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 400;
    font-family: inherit;
    transition: all 0.2s ease;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 16px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.lang-toggle:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.lang-toggle:focus {
    outline: 1px solid var(--text-primary);
    outline-offset: 2px;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-primary);
    padding: 0;
    border-radius: 0;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 400;
    font-family: inherit;
    transition: all 0.2s ease;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 16px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.theme-toggle:hover svg {
    transform: rotate(15deg);
}

.theme-toggle:focus {
    outline: 1px solid var(--text-primary);
    outline-offset: 2px;
}

.theme-toggle:active svg {
    transform: rotate(30deg) scale(0.95);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
    margin-right: 0;
    margin-left: 40px;
    flex: 1 1 auto;
    min-width: 0;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.mobile-menu-btn,
.lang-toggle,
.theme-toggle {
    flex-shrink: 0;
}

@media (max-width: 1200px) {
    .navbar {
        padding: 0 24px;
    }

    .navbar-nav {
        margin-left: 20px;
        gap: 16px;
    }
}

.navbar-nav::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.navbar-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.2s ease;
    position: relative;
    padding: 0;
    margin: 0;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    line-height: 1;
    height: 24px;
    min-height: 24px;
    box-sizing: border-box;
}

.navbar-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--text-primary);
    transform: scaleX(0);
    transition: transform 0.2s ease;
    transform-origin: center;
}

.navbar-nav a:hover {
    color: var(--text-primary);
}

.navbar-nav a:hover::after {
    transform: scaleX(1);
}

.navbar-nav a.active {
    color: var(--text-primary);
}

.navbar-nav a.active::after {
    transform: scaleX(1) !important;
}

.nav-more {
    display: none;
    position: relative;
}

.nav-more-trigger {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0;
    min-height: 24px;
    cursor: pointer;
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-more-trigger.active,
.nav-more-trigger:hover {
    color: var(--text-primary);
}

.nav-more-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 190px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    padding: 8px 0;
    display: none;
    z-index: 1200;
}

.nav-more:hover .nav-more-menu,
.nav-more:focus-within .nav-more-menu {
    display: block;
}

.nav-more-menu a {
    display: block;
    padding: 8px 14px;
    text-transform: none;
    letter-spacing: 0.02em;
    font-size: 0.8125rem;
    min-height: auto;
    height: auto;
}

@media (max-width: 1360px) and (min-width: 769px) {
    .nav-item-secondary {
        display: none;
    }

    .nav-more {
        display: block;
    }
}


/* Unified switch tabs */
.switch-tabs {
    display: inline-flex;
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
}

[data-theme="light"] .switch-tabs {
    /* 未选中 tab 透明底时露出容器色：用页面白底替代浅灰卡片区 */
    background: var(--bg-primary);
}

/* 某些页面原有 .tabs 会把容器拉满，这里统一收敛为内容宽度 */
.tabs.switch-tabs {
    display: flex !important;
    width: fit-content !important;
    max-width: 100%;
    margin: 0 auto;
}

.switch-tabs .switch-tab {
    border: none !important;
    border-bottom: none !important;
    background: transparent !important;
    color: var(--text-secondary) !important;
    min-height: 38px;
    padding: 0 22px;
    font-size: 0.8125rem;
    text-transform: none;
    letter-spacing: 0.02em;
    transition: all 0.2s ease;
    outline: none !important;
}

.switch-tabs .switch-tab + .switch-tab {
    border-left: 1px solid var(--border-subtle) !important;
}

.switch-tabs .switch-tab.active,
.switch-tabs .switch-tab.primary {
    background: var(--text-primary) !important;
    color: var(--bg-primary) !important;
    border-left-color: var(--text-primary) !important;
    border: none !important;
    background-clip: border-box !important;
    /* 选中态始终保留边框（与焦点无关） */
    box-shadow: inset 0 0 0 2px var(--bg-primary), 0 0 0 2px var(--text-primary);
}

.switch-tabs .switch-tab:focus,
.switch-tabs .switch-tab:focus-visible {
    outline: none !important;
}

/* 关闭 tab 中 primary 的渐变特效，避免出现紫色边框 */
.switch-tabs .switch-tab.primary::before,
.switch-tabs .switch-tab.primary::after {
    content: none !important;
    display: none !important;
}

.switch-tabs .switch-tab.active + .switch-tab,
.switch-tabs .switch-tab.primary + .switch-tab {
    border-left-color: var(--text-primary) !important;
}

.switch-tabs .switch-tab:hover {
    background: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
}

.switch-tabs .switch-tab.active:hover,
.switch-tabs .switch-tab.primary:hover {
    background: var(--text-primary) !important;
    color: var(--bg-primary) !important;
}

/* Standardized secondary menu (select + action buttons) */
.secondary-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    margin-top: 0;
    margin-bottom: 24px;
}

.secondary-menu-group {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
}

.secondary-menu > * {
    margin-right: 10px;
    margin-bottom: 0;
}

.secondary-menu > *:last-child {
    margin-right: 0;
}

.secondary-menu-group > * {
    margin-right: 10px;
    margin-bottom: 0;
}

.secondary-menu-group > *:last-child {
    margin-right: 0;
}

.secondary-menu button,
.secondary-menu select {
    min-height: 30px;
    height: 30px;
    padding: 0 10px;
    font-size: 0.6875rem;
    letter-spacing: 0.02em;
    text-transform: none;
}

/* 页面存在 compact/diff 局部样式时，保持二级菜单标准尺寸不被放大 */
.secondary-menu.compact-toolbar button,
.secondary-menu.compact-toolbar select,
.secondary-menu.diff-toolbar button,
.secondary-menu.diff-toolbar select {
    min-height: 30px;
    height: 30px;
    padding: 0 10px;
    font-size: 0.6875rem;
    letter-spacing: 0.02em;
    text-transform: none;
}

/* 工具条主按钮：去掉 primary 的渐变描边（点击/聚焦时易被看成紫框），保留实心样式 */
.secondary-menu button.primary {
    position: relative;
    border: 1px solid var(--text-primary) !important;
    background: var(--text-primary) !important;
    color: var(--bg-primary) !important;
    background-clip: border-box;
}

.secondary-menu button.primary::before,
.secondary-menu button.primary::after {
    content: none !important;
    display: none !important;
}

.secondary-menu button.primary:focus,
.secondary-menu button.primary:focus-visible {
    outline: none;
}

@media (max-width: 768px) {
    .secondary-menu {
        margin-bottom: 16px;
    }

    .secondary-menu-group > * {
        margin-bottom: 6px;
    }

    .secondary-menu > * {
        margin-bottom: 6px;
    }

    .secondary-menu button,
    .secondary-menu select {
        min-height: 28px;
        height: 28px;
        padding: 0 8px;
        font-size: 0.625rem;
    }
}

.footer {
    border-top: 1px solid var(--border-subtle);
    padding: 60px 80px;
    margin-top: 80px;
    text-align: center;
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copyright {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    line-height: 1.8;
}

.footer-copyright .icp-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    transition: color 0.2s ease;
}

.footer-copyright .icp-link:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

/* 赞赏码浮动按钮样式 */
.donation-float-btn {
    position: fixed;
    bottom: 80px;
    right: 40px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 999;
    transition: all 0.3s ease;
    border: 1px solid var(--text-primary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.donation-float-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.donation-float-btn:active {
    transform: translateY(0);
}

.donation-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.donation-float-btn:hover .donation-icon {
    transform: scale(1.1);
}

.donation-text {
    font-size: 0.875rem;
    font-weight: 400;
    white-space: nowrap;
}

/* 赞赏码弹窗样式 */
.donation-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.donation-modal.active {
    opacity: 1;
    visibility: visible;
}

.donation-modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    padding: 0;
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    position: relative;
}

.donation-modal.active .donation-modal-content {
    transform: scale(1) translateY(0);
}

.donation-modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.donation-modal-header h3 {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.donation-modal-close {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-default);
    background: transparent;
    color: var(--text-primary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    padding: 0;
}

.donation-modal-close:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.donation-modal-body {
    padding: 32px;
    text-align: center;
}

.donation-item-modal {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.donation-label-modal {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.donation-qr-modal {
    width: 240px;
    height: 240px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    overflow: hidden;
}

.donation-qr-modal img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.qr-placeholder {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: center;
    padding: 20px;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .donation-float-btn {
        bottom: 60px;
        right: 20px;
        padding: 10px 16px;
        gap: 6px;
    }
    
    .donation-icon {
        width: 16px;
        height: 16px;
    }
    
    .donation-text {
        font-size: 0.8125rem;
    }
    
    .donation-modal-content {
        width: 95%;
        max-width: 95%;
    }
    
    .donation-qr-modal {
        width: 200px;
        height: 200px;
    }
    
    .donation-modal-header,
    .donation-modal-body {
        padding: 20px;
    }
}

/* Toast通知样式 - 全局 */
.toast-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    color: var(--text-primary);
    padding: 16px 24px;
    font-size: 0.8125rem;
    min-width: 280px;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    animation: toastFadeIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 12px;
    line-height: 1.5;
}

.toast::before {
    content: '';
    width: 4px;
    height: 100%;
    background: var(--text-primary);
    flex-shrink: 0;
}

@keyframes toastFadeIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes toastFadeOut {
    from {
        transform: scale(1);
        opacity: 1;
    }
    to {
        transform: scale(0.9);
        opacity: 0;
    }
}

.toast.hiding {
    animation: toastFadeOut 0.3s ease-in forwards;
}

@media (max-width: 768px) {
    .toast {
        min-width: 240px;
        max-width: calc(100vw - 40px);
        padding: 14px 20px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 24px;
        height: 50px;
        min-height: 50px;
        max-height: 50px;
    }
    
    .navbar > div {
        display: flex;
        align-items: center;
        position: relative;
        flex: 1;
        min-width: 0;
    }
    
    .navbar-brand {
        font-size: 1.125rem;
        white-space: nowrap;
        flex-shrink: 0;
        margin-right: 12px;
        line-height: 1;
        height: 20px;
    }
    
    .navbar-nav {
        gap: 20px;
        flex-shrink: 0;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        flex: 1;
        min-width: 0;
        padding-right: 44px;
        margin-left: 0;
    }
    
    .navbar-nav::-webkit-scrollbar {
        display: none;
    }
    
    .navbar-nav {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }
    
    .navbar-nav a {
        font-size: 0.8125rem;
        white-space: nowrap;
        padding: 0;
        margin: 0;
        display: inline-flex;
        align-items: center;
        line-height: 1;
        height: 22px;
        min-height: 22px;
        box-sizing: border-box;
    }

    .nav-more {
        display: none !important;
    }
    
    .navbar > div > button {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        z-index: 10;
        background: var(--bg-card);
        color: var(--text-primary);
    }
    
    /* 移动端隐藏语言和主题按钮 */
    .lang-toggle,
    .theme-toggle {
        display: none;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu-btn {
        display: block;
        right: 0px;
        width: 32px;
        height: 32px;
        min-width: 32px;
        min-height: 32px;
        padding: 0;
        border: 1px solid var(--border-default);
        background: var(--bg-card);
        color: var(--text-primary);
        cursor: pointer;
        font-size: 20px;
        line-height: 1;
        -webkit-tap-highlight-color: transparent;
        -webkit-appearance: none;
        appearance: none;
    }

    /* 避免 iOS/WebKit 按下时把字色收成黑字，在深色导航条上「消失」 */
    .mobile-menu-btn:active,
    .mobile-menu-btn:focus {
        color: var(--text-primary);
        background: var(--bg-card);
        opacity: 1;
    }

    .mobile-menu-btn:focus-visible {
        outline: 1px solid var(--text-primary);
        outline-offset: 2px;
    }

    .mobile-menu-btn .mobile-menu-btn-icon {
        display: block;
        margin: 0 auto;
        pointer-events: none;
    }
    
    /* 移动端菜单面板 */
    .mobile-menu {
        position: fixed;
        top: 50px;
        right: 0;
        width: 140px;
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-top: none;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        display: none;
        z-index: 1000;
    }
    
    .mobile-menu.active {
        display: block;
    }
    
    .mobile-menu-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
        border-bottom: 1px solid var(--border-subtle);
        font-size: 0.875rem;
        color: var(--text-secondary);
    }
    
    .mobile-menu-item:last-child {
        border-bottom: none;
    }
    
    .mobile-menu-item button {
        width: 32px;
        height: 32px;
        min-width: 32px;
        min-height: 32px;
        padding: 0;
        margin: 0;
        border: 1px solid var(--border-default);
        background: var(--bg-primary);
        color: var(--text-primary);
        cursor: pointer;
        font-size: 0.75rem;
    }
    
    .footer {
        padding: 40px 16px;
    }
    
    .footer-links {
        gap: 16px;
        flex-wrap: wrap;
    }
    
    .footer-links a {
        font-size: 0.75rem;
    }
}



/* 桌面端显示语言和主题按钮，隐藏菜单按钮 */
@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none !important;
    }
    
    .mobile-menu {
        display: none !important;
    }
    
    .lang-toggle,
    .theme-toggle {
        display: inline-flex !important;
    }
}