/* 轻量化独居老人大数据监护助手项目 - 主样式文件 */
/* 作者：XXX团队 创建时间：2026年 */

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* CSS变量定义 - 浅色主题 */
:root {
    /* 主色调 */
    --primary-blue: #1a73e8;
    --primary-purple: #8a2be2;
    --primary-cyan: #00bcd4;
    --primary-green: #00c853;
    --primary-orange: #ff9800;
    --primary-red: #f44336;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e8f4f8;
    --bg-card: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.95);
    
    /* 文字色 */
    --text-primary: #2c3e50;
    --text-secondary: #546e7a;
    --text-muted: #78909c;
    --text-inverse: #ffffff;
    
    /* 边框色 */
    --border-light: #e0e0e0;
    --border-medium: #bdbdbd;
    --border-dark: #757575;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(26, 115, 232, 0.3);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-tech: linear-gradient(135deg, #1a73e8 0%, #00bcd4 50%, #00c853 100%);
    --gradient-card: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s ease;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-primary: #0a0f1c;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #2a2f3e;
    --bg-card: #1e2332;
    --bg-nav: rgba(10, 15, 28, 0.95);
    
    --text-primary: #e3f2fd;
    --text-secondary: #b0bec5;
    --text-muted: #78909c;
    
    --border-light: #37474f;
    --border-medium: #546e7a;
    --border-dark: #78909c;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(26, 115, 232, 0.5);
    
    --gradient-card: linear-gradient(135deg, #1e2332 0%, #2a2f3e 100%);
}

/* 容器布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
    background: var(--bg-secondary);
}

.nav-link.active {
    color: var(--primary-blue);
    background: var(--bg-tertiary);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: var(--transition-fast);
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: var(--bg-secondary);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    padding: 2rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-menu .nav-menu {
    flex-direction: column;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-menu .nav-link {
    display: block;
    padding: 1rem 1.5rem;
    text-align: center;
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 1px solid var(--border-light);
}

.mobile-menu .nav-link:hover,
.mobile-menu .nav-link.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* 控制按钮组 */
.control-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.theme-toggle .sun {
    position: absolute;
    transition: var(--transition-normal);
}

.theme-toggle .moon {
    position: absolute;
    transition: var(--transition-normal);
}

[data-theme="light"] .theme-toggle .sun {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

[data-theme="light"] .theme-toggle .moon {
    opacity: 0;
    transform: scale(0.5) rotate(-90deg);
}

[data-theme="dark"] .theme-toggle .sun {
    opacity: 0;
    transform: scale(0.5) rotate(90deg);
}

[data-theme="dark"] .theme-toggle .moon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

/* 主内容区域 */
.main-content {
    min-height: 100vh;
    padding-top: 80px;
}

/* 页面标题 */
.page-header {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--gradient-tech);
    color: var(--text-inverse);
    margin-bottom: 3rem;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e3f2fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 卡片组件 */
.card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition-slow);
}

.card:hover::before {
    left: 100%;
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* 进度条样式 */
.progress-container {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
}

.progress-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    position: relative;
}

.progress-track {
    flex: 1;
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-tech);
    border-radius: 4px;
    transition: width 0.6s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

.progress-label {
    min-width: 120px;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-current {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-orange);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.progress-current::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--primary-orange);
}

/* 动画效果 */
@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

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

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

.slide-in-left {
    animation: slideInLeft 0.6s ease forwards;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.6s ease forwards;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 页脚样式 */
.footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    border-top: 1px solid var(--border-light);
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

/* 友情链接下拉菜单样式 */
.friend-links {
    margin-top: 1rem;
}

.friend-links-dropdown {
    position: relative;
    display: inline-block;
}

.friend-links-toggle {
    background: none;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.friend-links-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
}

.friend-links-toggle.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.friend-links-toggle.active i {
    transform: rotate(180deg);
}

.friend-links-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 0.5rem;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
    z-index: 100;
    min-width: 150px;
    max-height: 120px;
    overflow-y: auto;
}

.friend-links-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.friend-links-menu::-webkit-scrollbar {
    width: 4px;
}

.friend-links-menu::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 2px;
}

.friend-links-menu::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 2px;
}

.friend-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    padding: 0.5rem;
    border-radius: 4px;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.friend-link:hover {
    color: var(--primary-blue);
    background: var(--bg-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-container {
        padding: 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .progress-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .progress-track {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .page-header {
        padding: 2rem 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .control-buttons {
        gap: 0.5rem;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .theme-toggle,
    .language-switcher {
        display: none;
    }
    
    .main-content {
        padding-top: 0;
    }
}