/* --- CSS 变量定义 --- */
:root {
    /* 默认暗色主题颜色 */
    --bg-primary: #121212;      /* 主要背景色 */
    --bg-secondary: #1e1e1e;   /* 次要背景色，卡片 */
    --border-color: #3a3a3a;   /* 边框颜色 */
    --text-primary: #e0e0e0;   /* 主要文字颜色 */
    --text-secondary: #a1a1aa; /* 次要文字颜色，如标语、图标 */
    --accent-color: #5eead4;   /* 强调色，如导航图标 */
    --link-color: #60a5fa;     /* 链接颜色 */
    --transition-speed: 0.3s;  /* 过渡动画速度 */
}

/* 明亮主题变量 */
body.light-theme {
    --bg-primary: #f9fafb;
    --bg-secondary: #ffffff;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7281;
}

/* --- 全局样式与重置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    font-size: 16px;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

a {
    color: inherit;
    text-decoration: none;
}

/* --- 布局容器 --- */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- 网页头部 --- */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
}

.site-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative; /* 确保相对定位 */
}

/* 头像容器样式 */
.avatar-container {
    position: relative;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    z-index: 2; /* 添加z-index确保头像在前面 */
}

.avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    cursor: pointer; /* 添加指针样式提示可交互 */
    transition: transform 0.3s ease; /* 平滑过渡效果 */
    will-change: transform; /* 优化性能 */
    transform-origin: center center; /* 设置旋转中心点 */
}

/* 旋转进度条样式 */
.rotation-progress {
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #eee;
    border-radius: 2px;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.rotation-progress-bar {
    height: 100%;
    width: 0;
    background-color: #0366d6;
    transition: width 0.1s linear;
}

.avatar-container:hover .rotation-progress {
    opacity: 1;
}

/* 飞行头像样式 */
.flying-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    transition: transform 0.1s linear; /* 飞行时的平滑过渡 */
    will-change: transform, left, top; /* 优化性能 */
    pointer-events: none; /* 防止干扰用户交互 */
}

/* 头像滚动动画 */
@keyframes rollRightAndBack {
    0% { 
        transform: translateX(0) rotate(0deg); 
    }
    40% { 
        transform: translateX(calc(100vw - 100px)) rotate(720deg);
        opacity: 1;
    }
    40.1% { 
        transform: translateX(-100vw) rotate(720deg);
        opacity: 0;
    }
    45% {
        transform: translateX(-100vw) rotate(720deg);
        opacity: 1;
    }
    100% { 
        transform: translateX(0) rotate(1080deg);
    }
}

/* 文字飞出和掉落动画 */
@keyframes flyAndFall {
    0% { 
        transform: translateX(0) translateY(0); 
        opacity: 1;
    }
    20% { 
        transform: translateX(200px) translateY(-150px); 
        opacity: 0.8;
    }
    40% { 
        transform: translateX(300px) translateY(-200px); 
        opacity: 0.6;
    }
    60% { 
        transform: translateX(400px) translateY(-100px); 
        opacity: 0.4;
    }
    80% { 
        transform: translateX(200px) translateY(100px); 
        opacity: 0.6;
    }
    90% { 
        transform: translateX(100px) translateY(50px); 
        opacity: 0.8;
    }
    95% { 
        transform: translateX(50px) translateY(20px); 
        opacity: 0.9;
    }
    100% { 
        transform: translateX(0) translateY(0); 
        opacity: 1;
    }
}

.avatar-container.rolling {
    animation: rollRightAndBack 2.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-title.flying {
    animation: flyAndFall 2.5s cubic-bezier(0.36, 0, 0.66, 1);
    transform-origin: center;
}

/* 添加碰撞效果的动画 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.site-title.shake {
    animation: shake 0.5s ease-in-out;
}

/* 站点标题的字符动画 */
.site-title span {
    display: inline-block;
    transition: transform 0.5s ease-out, opacity 0.5s ease-out;
    will-change: transform, opacity;
    position: relative;
    z-index: 1;
}

/* 头像晕眩动画 */
@keyframes dizzy {
    0% { 
        transform: rotate(0deg); 
        filter: blur(0);
    }
    25% { 
        transform: rotate(-5deg); 
        filter: blur(1px);
    }
    75% { 
        transform: rotate(5deg); 
        filter: blur(1px);
    }
    100% { 
        transform: rotate(0deg); 
        filter: blur(0);
    }
}

/* 晕眩星星动画 */
@keyframes stars {
    0% { 
        transform: rotate(0deg) translateY(-20px); 
        opacity: 0;
    }
    10% {
        transform: rotate(36deg) translateY(-20px);
        opacity: 0.4;
    }
    20% {
        transform: rotate(72deg) translateY(-20px);
        opacity: 0.8;
    }
    30% { 
        transform: rotate(108deg) translateY(-20px);
        opacity: 1;
    }
    50% {
        transform: rotate(180deg) translateY(-20px);
        opacity: 0.8;
    }
    70% {
        transform: rotate(252deg) translateY(-20px);
        opacity: 0.6;
    }
    90% {
        transform: rotate(324deg) translateY(-20px);
        opacity: 0.3;
    }
    100% { 
        transform: rotate(360deg) translateY(-20px); 
        opacity: 0;
    }
}

.avatar-container.dizzy::before,
.avatar-container.dizzy::after {
    content: "✦";
    position: absolute;
    top: -5px;
    left: 50%;
    font-size: 20px;
    color: #FFD700;
    animation: stars 1.5s infinite linear;
    text-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
}

.avatar-container.dizzy::after {
    content: "✦";
    animation-delay: 0.75s;
    left: 30%;
}

.avatar-container.dizzy .avatar {
    animation: dizzy 0.5s infinite ease-in-out;
    filter: saturate(1.2);
}

.avatar-container.cooldown::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 50%;
    pointer-events: none;
}

.site-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-nav a {
    color: var(--accent-color);
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.header-nav a:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.header-nav .icon {
    width: 22px;
    height: 22px;
    display: inline-block;
    vertical-align: middle;
}

/* --- 分隔线 --- */
.divider {
    border: none;
    height: 1px;
    background-color: var(--border-color);
    margin: 0;
    transition: background-color var(--transition-speed) ease;
}

/* --- 主页内容区域 --- */
.main-content {
    padding: 1.5rem 0;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.post-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.post-item a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color var(--transition-speed) ease, transform var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

.post-item a:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
}

.post-title-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.post-title-container .icon {
    color: var(--text-secondary);
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.post-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    padding: 0.2rem 0.6rem;
    white-space: nowrap;
}

.tag-number { background-color: #14b8a6; color: #ffffff; width: 22px; height: 22px; padding: 0; border-radius: 50%;}
.tag-yellow { background-color: #facc15; color: #422006; }
.tag-blue { background-color: #3b82f6; color: #eff6ff; }
.tag-orange { background-color: #f97316; color: #fff7ed; }

/* --- 网页页脚 --- */
.footer {
    text-align: center;
    padding: 3rem 0 2rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer p { line-height: 1.5; }
.footer a { color: var(--link-color); transition: color var(--transition-speed) ease; }
.footer a:hover { color: var(--accent-color); }

/* --- 响应式设计 --- */
@media (max-width: 768px) {
    .header { flex-direction: column; gap: 1.5rem; }
    .post-item a { flex-direction: column; align-items: flex-start; }
    .post-meta { margin-top: 0.75rem; }
}

/* === 文章页面样式 === */
.article-content {
    padding: 1.5rem 0;
    line-height: 1.8;
}

.article-content h1 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.article-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.article-content p {
    margin-bottom: 1.25rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.article-content a {
    color: var(--link-color);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: color var(--transition-speed) ease;
}

.article-content a:hover { color: var(--accent-color); }

.article-content ul, .article-content ol {
    margin-bottom: 1.25rem;
    padding-left: 2rem;
}

.article-content hr {
    border: none;
    height: 1px;
    background-color: var(--border-color);
    margin: 2rem 0;
}

.article-content blockquote {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--link-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}

.article-content blockquote p { margin: 0; }

/* 文章图片样式 */
.article-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: block;
}

.error-message { color: #f87171; text-align: center; padding: 2rem; font-size: 1.1rem; }