/* 橙色毛玻璃主题 - 支持日/夜模式 */
:root {
    /* 日间模式 - 橙色主题 */
    --primary: #ff6b35;
    --primary-light: #ff8c61;
    --primary-dark: #e55a2b;
    --secondary: #ff9f43;
    --accent: #ff6b35;
    
    /* 背景色 */
    --bg-primary: #fff8f5;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-strong: rgba(255, 255, 255, 0.85);
    
    /* 文字颜色 */
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-muted: #b2bec3;
    
    /* 边框和阴影 */
    --border-color: rgba(255, 107, 53, 0.2);
    --shadow: 0 8px 32px rgba(255, 107, 53, 0.1);
    --shadow-strong: 0 12px 48px rgba(255, 107, 53, 0.15);
    
    /* 毛玻璃效果 */
    --glass-blur: blur(12px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.3);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #ff9f43 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0.1) 100%);
}

/* 夜间模式 */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-glass: rgba(22, 33, 62, 0.7);
    --bg-glass-strong: rgba(22, 33, 62, 0.85);
    
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #6c6c6c;
    
    --border-color: rgba(255, 107, 53, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-strong: 0 12px 48px rgba(0, 0, 0, 0.5);
    
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

/* 导航栏 - 毛玻璃效果 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: var(--glass-border);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.brand-icon {
    font-size: 1.8rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: all 0.3s;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: var(--bg-glass-strong);
    border: var(--glass-border);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.3s;
    backdrop-filter: blur(4px);
}

.theme-toggle:hover {
    transform: rotate(180deg);
}

.theme-icon {
    font-size: 1.2rem;
}

/* 按钮样式 - 毛玻璃 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-outline {
    background: var(--bg-glass);
    color: var(--primary);
    border: 2px solid var(--primary);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* 用户菜单 */
.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 12px;
    background: var(--bg-glass);
    backdrop-filter: blur(4px);
    border: var(--glass-border);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--bg-glass-strong);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    box-shadow: var(--shadow-strong);
}

.user-menu:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown a {
    display: block;
    padding: 0.6rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.2s;
}

.dropdown a:hover {
    background: var(--primary);
    color: white;
}

.dropdown hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 0.5rem 0;
}

/* 主要内容区 */
main {
    padding-top: 90px;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 卡片 - 毛玻璃效果 */
.card {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-strong);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

/* 工具卡片网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-strong);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tool-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 响应式 - 移动端折叠菜单 */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-glass-strong);
        backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
        border-bottom: var(--glass-border);
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: 0.8rem;
        text-align: center;
        background: var(--bg-glass);
        border-radius: 12px;
    }
    
    .nav-actions {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .user-menu {
        width: 100%;
        justify-content: center;
    }
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* 页面标题 */
.page-header {
    text-align: center;
    padding: 4rem 0;
    background: var(--gradient-glass);
    margin-bottom: 2rem;
    border-bottom: var(--glass-border);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}