/* style.css - 全站外观控制中心 */

:root {
    /* --- 核心变量 (想换主题色改这里) --- */
    --bg-color: #0a0a0a;       /* 全站深色背景 */
    --text-color: #ffffff;     /* 主要文字颜色 */
    --text-muted: rgba(255, 255, 255, 0.6); /* 次要文字颜色 */
    
    /* --- 卡片组件变量 --- */
    --card-bg: rgba(255, 255, 255, 0.02);
    --card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* --- 字体设置 --- */
    --main-font: 'Helvetica Neue', Arial, sans-serif;
}

/* 1. 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--main-font);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: hidden; /* 防止横向滚动条 */
    position: relative;
}

/* 2. 粒子背景层级控制 */
#tsparticles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0; 
}

/* 3. 内容层级控制 (保证内容在粒子之上) */
.content-wrapper, .container {
    position: relative;
    z-index: 10;
    width: 100%;
}

/* 4. 通用链接样式 */
a { text-decoration: none; color: inherit; transition: 0.3s; }

/* ----------------------------------------------------
   组件库：高级感导航卡片 (Navigation Card)
   任何页面只要用 class="nav-card" 就能拥有这个样式
---------------------------------------------------- */
.nav-card {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 30px 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    margin-bottom: 20px; /* 卡片间距 */
}

.nav-card:hover {
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateX(10px);
    box-shadow: 0 5px 30px rgba(0,0,0,0.5);
}

.card-content { display: flex; flex-direction: column; z-index: 2; }
.card-title { font-size: 1.4rem; font-weight: 500; color: #e0e0e0; letter-spacing: 2px; transition: 0.3s; }
.card-subtitle { font-size: 0.7rem; color: #666; text-transform: uppercase; letter-spacing: 1px; margin-top: 5px;}
.nav-card:hover .card-title { color: #fff; padding-left: 10px; }

/* 背景大数字 */
.card-number {
    position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
    font-size: 5rem; font-weight: 900; color: rgba(255, 255, 255, 0.03);
    font-style: italic; transition: all 0.5s ease; z-index: 1;
}
.nav-card:hover .card-number { color: rgba(255, 255, 255, 0.1); right: 40px; }

/* 左侧亮条装饰 */
.nav-card::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0;
    width: 2px; background: #fff; opacity: 0; transition: 0.3s;
}
.nav-card:hover::before { opacity: 1; }

/* 手机适配 */
@media (max-width: 600px) {
    .nav-card { padding: 20px; }
    .card-title { font-size: 1.1rem; }
    .card-number { font-size: 3rem; }
}