/* 全新原创校园风主题：薄荷绿 + 樱花粉 */
:root {
    --primary-color: #4CAF50;      /* 薄荷绿 */
    --secondary-color: #FF8FA3;    /* 樱花粉 */
    --accent-color: #FFA726;       /* 活力橙 */
    --text-main: #333333;
    --text-light: #666666;
    --bg-main: #F9FAFB;
    --bg-white: #FFFFFF;
    --border-color: #E0E0E0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 24px rgba(76, 175, 80, 0.15);
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

/* 布局工具 */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.ro68t9 { padding: 80px 0; }
.9qw2g7fj {
    text-align: center; font-size: 32px; margin-bottom: 15px; color: var(--primary-color);
    font-weight: 700; position: relative;
}
.9qw2g7fj::after {
    content: ''; display: block; width: 60px; height: 4px; background: var(--secondary-color);
    margin: 15px auto 0; border-radius: 2px;
}
.qaeu44 { text-align: center; color: var(--text-light); margin-bottom: 50px; font-size: 16px; }

/* 头部导航 */
.pjzak8c2 {
    background: var(--bg-white); box-shadow: var(--shadow-sm);
    position: sticky; top: 0; z-index: 1000;
}
.iqcsww3y { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.h6pquei5 { display: flex; align-items: center; gap: 15px; }
.svyev7 { height: 50px; width: 50px; border-radius: 50%; }
.f8spye2 { font-size: 24px; font-weight: bold; color: var(--primary-color); letter-spacing: 1px; }
.nav-links { display: flex; gap: 30px; }
.0q1thgm {
    font-size: 16px; font-weight: 500; color: var(--text-main); transition: var(--transition);
    position: relative; padding: 10px 0;
}
.0q1thgm:hover, .0q1thgm.active { color: var(--primary-color); }
.0q1thgm::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 3px;
    background: var(--primary-color); transition: var(--transition); border-radius: 2px;
}
.0q1thgm:hover::after, .0q1thgm.active::after { width: 100%; }

/* 搜索框 */
.ue9gul9q { display: flex; align-items: center; background: var(--bg-main); border-radius: 30px; padding: 5px 15px; }
.search-input { border: none; background: transparent; outline: none; padding: 8px; width: 180px; }
.search-btn { background: var(--primary-color); color: white; border: none; border-radius: 50%; width: 32px; height: 32px; cursor: pointer; }

/* 首页 Hero */
.3xlifqm {
    position: relative; height: 600px; display: flex; align-items: center;
    background-image: url('../images/hero_banner.jpg');
    background-size: cover; background-position: center;
}
.vs8h0c {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%);
}
.7lf7r5w { position: relative; z-index: 10; color: white; max-width: 600px; }
.ppovh { display: inline-block; background: var(--secondary-color); padding: 5px 15px; border-radius: 20px; font-size: 14px; font-weight: bold; margin-bottom: 20px; }
.rvfap { font-size: 48px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
.4a9elgmr { font-size: 18px; margin-bottom: 30px; opacity: 0.9; }
.btn {
    display: inline-block; padding: 12px 30px; border-radius: 30px; font-size: 16px; font-weight: bold;
    transition: var(--transition); cursor: pointer; text-align: center;
}
.btn-primary { background: var(--primary-color); color: white; box-shadow: var(--shadow-md); }
.btn-primary:hover { background: #3d8b40; transform: translateY(-2px); }

/* 视频卡片 (纯CSS+JS交互) */
.pi8d55 { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 30px; }
.video-card {
    background: var(--bg-white); border-radius: var(--radius-md); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition);
    position: relative;
}
.video-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.ljaah1 { position: relative; padding-top: 56.25%; /* 16:9 */ overflow: hidden; }
.ljaah1 img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.video-card:hover .ljaah1 img { transform: scale(1.05); }
.play-btn-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.4); display: flex; justify-content: center; align-items: center;
    opacity: 0; transition: var(--transition);
}
.video-card:hover .play-btn-overlay { opacity: 1; }
.play-icon {
    width: 60px; height: 60px; background: var(--primary-color); border-radius: 50%;
    display: flex; justify-content: center; align-items: center; color: white; font-size: 24px;
    padding-left: 5px; /* 修正播放三角形视觉居中 */
}
.if6j7pkn { padding: 20px; }
.361om { font-size: 12px; color: var(--secondary-color); font-weight: bold; margin-bottom: 8px; display: block; }
.ohp9fkk3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: var(--text-main); }
.x94og { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-light); }

/* 专家展示 */
.d0rwo2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; }
.88xte29q { text-align: center; }
.v9n2sof {
    width: 160px; height: 160px; border-radius: 50%; margin: 0 auto 20px;
    object-fit: cover; border: 5px solid var(--bg-white); box-shadow: var(--shadow-md);
}
.0fp21ja { font-size: 22px; font-weight: bold; color: var(--primary-color); margin-bottom: 5px; }
.5ehhrv { color: var(--secondary-color); font-weight: 500; margin-bottom: 15px; }
.4s7pofcz { color: var(--text-light); font-size: 14px; margin-bottom: 20px; }

/* FAQ */
.tf2cu { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-white); border-radius: var(--radius-md); margin-bottom: 15px; box-shadow: var(--shadow-sm); overflow: hidden; }
.faq-q { padding: 20px; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-a { padding: 0 20px 20px; color: var(--text-light); display: none; }
.faq-item.active .faq-a { display: block; }
.faq-item.active .faq-q { color: var(--primary-color); }

/* 评论区 */
.l9lz1 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.voa7s1 { background: var(--bg-white); padding: 30px; border-radius: var(--radius-lg); position: relative; }
.voa7s1::before { content: '"'; position: absolute; top: 10px; left: 20px; font-size: 60px; color: var(--bg-main); font-family: serif; }
.soamiq5x { font-style: italic; color: var(--text-light); margin-bottom: 20px; position: relative; z-index: 1; }
.nnto9s { display: flex; align-items: center; gap: 15px; }
.fir1y { width: 40px; height: 40px; border-radius: 50%; background: var(--secondary-color); display: flex; justify-content: center; align-items: center; color: white; font-weight: bold; }
.loj2ou h4 { font-size: 16px; margin: 0; }
.loj2ou p { font-size: 12px; color: var(--text-light); margin: 0; }

/* 页脚 */
.h4w1z69z { background: #2c3e50; color: #ecf0f1; padding: 60px 0 20px; }
.8qc7v { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
.bp4608dr { font-size: 18px; font-weight: bold; margin-bottom: 20px; color: white; }
.g4pewd7l li { margin-bottom: 10px; }
.g4pewd7l a { color: #bdc3c7; transition: var(--transition); }
.g4pewd7l a:hover { color: var(--primary-color); }
.7kr4zl { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); color: #95a5a6; font-size: 14px; }
.lsc2ne { display: flex; gap: 20px; }
.cb6td { text-align: center; }
.cmq920 { width: 100px; height: 100px; background: white; margin-bottom: 10px; padding: 5px; }

/* MCP悬浮窗 */
.mcp-widget { position: fixed; right: 20px; bottom: 100px; z-index: 999; }
.mcp-btn { width: 60px; height: 60px; border-radius: 50%; background: var(--primary-color); color: white; display: flex; justify-content: center; align-items: center; box-shadow: var(--shadow-md); cursor: pointer; font-size: 24px; transition: transform 0.3s; }
.mcp-btn:hover { transform: scale(1.1); }

/* 移动端适配 */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .rvfap { font-size: 32px; }
    .3xlifqm { height: 400px; }
    .ue9gul9q { display: none; }
}