/* --- CSS 全局变量定义 --- */
:root {
    --bg-color: #121212;
    --text-color: #E0E0E0;
    --primary-color: #007BFF;
    --primary-hover-color: #0056b3;
    --secondary-color: #1c1c1c;
    --headline-color: #FFFFFF;
    --headline-gradient-start: #007BFF;
    --headline-gradient-end: #00C6FF;
    --font-family: 'Poppins', sans-serif;
    --container-width: 1100px;
}

/* --- 全局样式重置和基础设置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

/* --- 共享组件: 网站头部/导航栏 --- */
.site-header {
    padding: 20px 0;
    border-bottom: 1px solid var(--secondary-color);
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--headline-color);
}

    .logo img {
        height: 40px;
        margin-right: 12px;
    }

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

    .nav-links a {
        color: var(--text-color);
        font-weight: 600;
        transition: color 0.3s ease;
    }

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

.external-icon {
    font-size: 0.8em;
    vertical-align: super;
}

/* --- 共享组件: 按钮 --- */
.btn {
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

    .btn-primary:hover {
        background-color: var(--primary-hover-color);
        transform: translateY(-2px);
    }

.btn-secondary {
    background-color: transparent;
    border-color: #333;
    color: var(--text-color);
}

    .btn-secondary:hover {
        background-color: #333;
        color: white;
    }

/* --- 共享组件: 模拟窗口 (Windows 样式) --- */
.mockup-window {
    background-color: #1E1E1E;
    border: 1px solid #3c3c3c;
    border-radius: 8px;
    padding: 20px 1px 1px 1px;
    position: relative;
    box-shadow: 0 20px 30px rgba(0,0,0,0.5);
    overflow: hidden;
    width: 100%;
}

.mockup-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 20px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 5px;
    gap: 1px;
}

    .mockup-header .win-btn {
        width: 45px;
        height: 20px;
        display: flex;
        justify-content: center;
        align-items: center;
        transition: background-color 0.2s ease;
    }

        .mockup-header .win-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

    .mockup-header .win-btn-close:hover {
        background-color: #e81123;
    }

.win-btn .icon-min {
    width: 10px;
    height: 1px;
    background-color: var(--text-color);
}

.win-btn .icon-max {
    width: 10px;
    height: 10px;
    border: 1px solid var(--text-color);
}

.win-btn .icon-close {
    width: 10px;
    height: 10px;
    position: relative;
}

    .win-btn .icon-close::before,
    .win-btn .icon-close::after {
        content: '';
        position: absolute;
        left: 5px;
        top: 0;
        width: 1px;
        height: 10px;
        background-color: var(--text-color);
    }

    .win-btn .icon-close::before {
        transform: rotate(45deg);
    }

    .win-btn .icon-close::after {
        transform: rotate(-45deg);
    }

.mockup-window img {
    max-width: 100%;
    display: block;
    border-bottom-left-radius: 7px;
    border-bottom-right-radius: 7px;
}

/* --- 共享组件: 蓝色高亮文字 --- */
.highlight-blue {
    background: linear-gradient(90deg, var(--headline-gradient-start), var(--headline-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

/* --- 共享响应式设计: 隐藏移动端导航 --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
}

/* --- 共享组件: 代码块 --- */
code {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.2em 0.4em;
    margin: 0 2px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'Courier New', Courier, monospace;
}

pre {
    background-color: #0d0d0d;
    border: 1px solid var(--secondary-color);
    border-radius: 8px;
    padding: 1.2em;
    margin: 1.5em 0;
    overflow-x: auto;
    white-space: pre;
}

    pre code {
        background-color: transparent;
        padding: 0;
        margin: 0;
        font-size: 1em;
    }

/* --- 共享组件: 表格 --- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
    font-size: 0.95rem;
}

    table th,
    table td {
        border: 1px solid var(--secondary-color);
        padding: 0.8em 1em;
        text-align: left;
        vertical-align: top;
    }

    table th {
        background-color: #222;
        font-weight: 700;
        color: var(--headline-color);
    }

    table tr:nth-child(even) {
        background-color: rgba(255, 255, 255, 0.02);
    }