/* 全局变量定义 */
:root {
    /* 浅色模式变量 */
    --primary-color: #007BFF;
    --hover-color: #66a6ff;
    --bg-gradient: linear-gradient(-45deg, #f3f9ff, #e6f4ff, #d9efff, #cceaff);
    --text-color: #333;
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-text: #333;
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 12px 24px rgba(0, 0, 0, 0.2);
    --popup-bg: rgba(255, 255, 255, 0.95);
    --email-item-bg: rgba(255, 255, 255, 0.95);
    --email-item-border: rgba(204, 204, 204, 0.5);
    --transition-timing: 0.3s ease;
    
    /* 添加主题切换过渡效果 */
    --theme-transition: color 0.5s ease, 
                        background 0.5s ease, 
                        background-color 0.5s ease,
                        border-color 0.5s ease,
                        box-shadow 0.5s ease;
}

/* 深色模式变量 */
[data-theme="dark"] {
    --primary-color: #3f93ff;
    --hover-color: #8ab9ff;
    --bg-gradient: linear-gradient(-45deg, #1a1a2e, #16213e, #1f3756, #293b61);
    --text-color: #e6e6e6;
    --card-bg: rgba(30, 40, 60, 0.4);
    --card-text: #e6e6e6;
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 12px 24px rgba(0, 0, 0, 0.4);
    --popup-bg: rgba(40, 44, 52, 0.95);
    --email-item-bg: rgba(30, 40, 60, 0.95);
    --email-item-border: rgba(70, 70, 70, 0.5);
}

/* 全局动画定义 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes colorPulse {
    0%, 100% { color: var(--primary-color); }
    50% { color: var(--hover-color); }
}

@keyframes gridFade {
    from { 
        opacity: 0; 
        transform: translateY(30px); 
        -webkit-transform: translateY(30px);
    }
    to { 
        opacity: 1; 
        transform: translateY(0);
        -webkit-transform: translateY(0);
    }
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 基础样式设置 */
body {
    background: var(--bg-gradient);
    background-size: 400% 400%; /* 减小背景尺寸 */
    animation: gradientBG 20s linear infinite; /* 降低动画频率，使用线性动画 */
    -webkit-animation: gradientBG 20s linear infinite;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: var(--text-color);
    transition: var(--theme-transition);
    /* 加速渲染 */
    will-change: auto; /* 自动确定what will change */
}

/* 主题过渡动画应用到所有关键元素 */
.card, .social-links, .email-popup, .email-item, 
.copy-button-container, .copy-button, .close-button,
.main-title, .theme-toggle, a, button, h1, h2, h3, p {
    transition: var(--theme-transition);
}

/* 主标题样式 */
.main-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin: clamp(2rem, 4vw, 4rem) 0;
    text-align: center;
    text-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    animation: glow 2s ease-in-out infinite alternate;
    -webkit-animation: glow 2s ease-in-out infinite alternate;
    will-change: text-shadow;
}

/* 优化发光效果 */
@keyframes glow {
    0% {
        text-shadow: 
            0 0 5px rgba(255, 255, 255, 0.5),
            0 0 10px rgba(255, 255, 255, 0.5);
    }
    100% {
        text-shadow: 
            0 0 20px rgba(255, 255, 255, 0.8),
            0 0 40px rgba(255, 255, 255, 0.8);
    }
}

@-webkit-keyframes glow {
    0% {
        text-shadow: 
            0 0 5px rgba(255, 255, 255, 0.5),
            0 0 10px rgba(255, 255, 255, 0.5);
    }
    100% {
        text-shadow: 
            0 0 20px rgba(255, 255, 255, 0.8),
            0 0 40px rgba(255, 255, 255, 0.8);
    }
}

.main-title span {
    font-size: clamp(1.5rem, 3vw, 2rem);
    display: block;
    margin-top: clamp(0.5rem, 2vw, 1rem);
    opacity: 0.8;
    transition: opacity var(--transition-timing);
}

/* 网格布局 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    /* 移除模糊滤镜，提高性能 */
    border-radius: 15px;
    padding: clamp(1.5rem, 3vw, 2rem);
    /* 简化过渡效果 */
    transition: transform 0.3s ease,
                box-shadow 0.3s ease,
                background-color 0.3s ease;
    text-decoration: none;
    color: var(--card-text);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px); /* 减小位移距离 */
    -webkit-transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15); /* 减小阴影 */
}

/* 移除卡片的光效扫过动画，该动画较为耗费资源 */

.icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #007BFF;
    transition: transform 0.3s ease, color 0.3s ease;
    position: relative;
}

.icon:hover {
    transform: scale(1.1); /* 减小缩放比例 */
    color: var(--hover-color);
    /* 移除消耗性能的发光动画 */
}

/* 底部社交链接 */
.social-links {
    position: fixed;
    bottom: clamp(1rem, 3vw, 2rem);
    left: 50%;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    display: flex;
    gap: clamp(1rem, 3vw, 2rem);
    background: var(--card-bg);
    /* 移除高斯模糊以提高性能 */
    padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: 50px;
    box-shadow: var(--shadow-light);
    z-index: 10;
}

/* 确保邮件图标正确显示 */
.social-links #email-icon {
    cursor: pointer;
    position: relative;
}

.social-links a {
    color: var(--text-color);
    font-size: clamp(1.5rem, 3vw, 2rem);
    opacity: 0.8;
    transition: opacity var(--transition-timing),
                transform var(--transition-timing),
                color var(--transition-timing);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none !important;
    position: relative;
}

.social-links a:hover {
    opacity: 1;
    text-decoration: none !important;
    transform: translateY(-5px); /* 减小移动距离 */
    -webkit-transform: translateY(-5px);
    color: var(--primary-color);
    text-decoration: none;
    /* 移除持续动画，减少性能消耗 */
}

/* 社交链接悬停提示 */
.social-links a::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 14px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    pointer-events: none;
    margin-bottom: 5px;
    box-shadow: var(--shadow-light);
}

.social-links a:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }
}

/* 页面加载动画 - 简化版 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-gradient);
    background-size: 200% 200%; /* 减小背景尺寸 */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loader-content {
    text-align: center;
}

.loader-icon {
    font-size: 3rem; /* 减小图标尺寸 */
    color: var(--primary-color);
    margin-bottom: 1rem;
    /* 使用更简单的动画 */
    animation: simpleSpin 2s linear infinite;
}

.loader-text {
    font-size: 1.5rem;
    color: var(--text-color);
    font-weight: bold;
}

@keyframes simpleSpin {
    0% { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}

/* 新增版本框浮动效果 */
.version-box {
    animation: float 3s ease-in-out infinite;
}

/* 新增Insiders框浮动效果 */
.insiders-box {
    animation: float 3s ease-in-out infinite;
}

/* 添加滚动动画效果 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 视差滚动效果已移除 - 该效果在低性能设备上会造成卡顿 */

/* 新增浮动动画效果 */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 邮箱弹出框样式 - 简化版 */
.email-popup {
    background: var(--popup-bg);
    padding: clamp(15px, 3vw, 20px);
    border-radius: 15px;
    box-shadow: var(--shadow-medium);
    z-index: 1000;
    /* 移除高斯模糊，提高性能 */
    min-width: 280px;
    max-width: 320px;
    color: var(--text-color);
    /* 简化过渡效果 */
    transition: opacity 0.3s ease,
                transform 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    /* 确保弹窗在适当的位置显示 */
    position: fixed;
}

/* 邮件列表样式 */
.email-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

/* 邮件项样式 */
.email-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border: 1px solid var(--email-item-border);
    border-radius: 8px;
    background-color: var(--email-item-bg);
    transition: transform 0.2s ease,
                box-shadow 0.2s ease;
}

.email-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 邮箱项样式 */
.email-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: clamp(12px, 2vw, 15px);
    padding: clamp(10px, 2vw, 12px);
    border: 1px solid var(--email-item-border);
    border-radius: 10px;
    background-color: var(--email-item-bg);
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
                background-color 0.3s ease,
                color 0.3s ease;
    will-change: transform, box-shadow;
    color: var(--text-color);
    position: relative;
    overflow: hidden;
}

.email-item:hover {
    transform: translateY(-4px) scale(1.02);
    -webkit-transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 123, 255, 0.2);
    border-color: rgba(0, 123, 255, 0.3);
}

.email-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.email-item:hover::after {
    transform: translateX(100%);
}

/* 复制按钮容器样式 */
.copy-button-container {
    border: 1px solid rgba(204, 204, 204, 0.5);
    border-radius: 8px;
    transition: background-color 0.2s ease;
    overflow: hidden;
    position: relative;
    padding: 4px;
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
}

/* 复制按钮和关闭按钮样式 */
.copy-button, .close-button {
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.copy-button {
    background: transparent;
    border: none;
    padding: 4px 8px;
    color: var(--text-color);
}

.copy-button:hover {
    color: var(--primary-color);
}

.close-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    font-weight: 500;
    display: block;
    width: 100%;
    max-width: 120px;
    margin-left: auto;
    margin-right: auto;
}

.close-button:hover {
    background-color: var(--hover-color);
}

/* 复制按钮样式 */
.copy-button {
    background-color: transparent;
    color: var(--primary-color);
    border: none;
    padding: clamp(4px, 1vw, 5px) clamp(8px, 2vw, 10px);
    border-radius: 5px;
    cursor: pointer;
    transition: color var(--transition-timing),
                background-color var(--transition-timing);
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-button:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 关闭按钮样式 */
.close-button {
    background-color: rgba(220, 53, 69, 0.9);
    color: white;
    border: none;
    padding: clamp(4px, 1vw, 5px) clamp(8px, 2vw, 10px);
    border-radius: 5px;
    cursor: pointer;
    transition: background-color var(--transition-timing),
                transform var(--transition-timing);
    margin-top: clamp(8px, 2vw, 10px);
    display: block;
    width: 100%;
    max-width: 120px;
    margin-left: auto;
    margin-right: auto;
}

.close-button:hover {
    background-color: rgba(220, 53, 69, 1);
    transform: translateY(-2px);
    -webkit-transform: translateY(-2px);
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--card-bg);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    box-shadow: var(--shadow-light);
    transition: background 0.3s ease, transform 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle i {
    color: var(--text-color);
    font-size: 1.2rem;
    transition: color 0.3s ease;
}