/* --- 现代华丽视觉系统 --- */
:root {
    --bg-gradient: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(255, 255, 255, 0.4);
    --text-main: #2c3e50;
    --text-muted: #606f7b;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
    --radius: 20px;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* 夜间模式自动切换更酷炫的暗色霓虹 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient: linear-gradient(-45deg, #0f172a, #1e1b4b, #2e1065, #0f172a);
        --card-bg: rgba(30, 41, 59, 0.7);
        --card-border: rgba(255, 255, 255, 0.1);
        --text-main: #f8fafc;
        --text-muted: #94a3b8;
        --accent-gradient: linear-gradient(135deg, #a78bfa 0%, #f472b6 100%);
        --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    }
}

/* --- 全局流沙背景动画 --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-gradient);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.8;
    padding: 0;
    margin: 0;
}

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

.container {
    max-width: 850px;
    margin: 4rem auto;
    padding: 2.5rem;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

/* --- 导航栏与页头 --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    letter-spacing: -1px;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 600;
    position: relative;
    padding: 0.5rem 0;
}

/* 炫酷导航条下划线动画 */
nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: var(--transition);
}
nav a:hover::after {
    width: 100%;
}

/* --- 主页专属：博主头像与欢迎语 --- */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

/* --- 主页专属：炫酷文章卡片 --- */
.section-title {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.post-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.post-card {
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
    .post-card { background: rgba(15, 23, 42, 0.3); }
}

/* 卡片悬浮发光和位移 */
.post-card:hover {
    transform: translateY(-5px) scale(1.01);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.post-card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.6s;
}
.post-card:hover::before {
    left: 100%;
}

.post-meta {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.post-card h3 {
    font-size: 1.5rem;
    margin: 0.5rem 0;
}

.post-card p {
    color: var(--text-muted);
    margin: 0;
}

/* --- 子页面专属：文章内容样式 --- */
.article-header {
    margin-bottom: 3rem;
    text-align: center;
}
.article-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
}
.btn-back {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 2rem;
}
.btn-back:hover {
    transform: translateX(-5px);
    background: var(--text-main);
    color: var(--bg-gradient);
}
.content img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

/* --- 页脚 --- */
footer {
    margin-top: 5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}
/* --- 专属追加：现代磨砂玻璃代码块与复制按钮体系 --- */
.code-block-wrapper {
    position: relative;
    margin: 2rem 0;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid var(--card-border);
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.05);
    overflow: hidden;
    transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
    .code-block-wrapper {
        background: rgba(15, 23, 42, 0.5);
    }
}

.code-block-wrapper pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
}

.code-block-wrapper code {
    font-family: "Fira Code", Consolas, Monaco, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-main);
}

/* 炫酷复制按钮 */
.copy-button {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    cursor: pointer;
    box-shadow: var(--shadow);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: var(--transition);
    opacity: 0.6; /* 默认半透明隐藏，不挡视线 */
}

/* 鼠标移入代码块时让按钮显现 */
.code-block-wrapper:hover .copy-button {
    opacity: 1;
}

.copy-button:hover {
    transform: scale(1.05);
    background: var(--accent-gradient);
    -webkit-background-clip: unset;
    -webkit-text-fill-color: #fff;
    color: #fff;
    border-color: transparent;
}

/* 复制成功后的高亮状态 */
.copy-button.copied {
    background: #10b981 !important;
    color: #fff !important;
    -webkit-text-fill-color: #fff !important;
    border-color: transparent;
    opacity: 1;
}

/* 行内小代码加个微弱底色 */
p code, li code {
    background: rgba(0, 0, 0, 0.05);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
}
@media (prefers-color-scheme: dark) {
    p code, li code {
        background: rgba(255, 255, 255, 0.1);
    }
}