/* Personal website link styling for member cards */
.member-website-link {
    margin-top: 6px;
    font-size: 0.95em;
    color: #2a3a5e;
    text-decoration: underline;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    transition: color 0.2s;
}
.member-website-link:hover,
.member-website-link:focus {
    color: #1a237e;
    outline: none;
}
/* --- style.css (品牌升级版) --- */
/* 定义颜色变量 */
:root {
    --bg-color: #0B0C10; /* 深空黑背景 */
    --text-primary: #FFFFFF; /* 主要文字白 */
    --text-secondary: #C5C6C7; /* 次要文字灰 */
    --accent-cyan: #45A29E; /* 青色强调 (代表气体/ALMA) */
    --accent-orange: #FF6B35; /* 橙色强调 (代表尘埃/JWST/活力) */
    --card-bg: #1F2833; /* 卡片背景色 */
}

/* 全局设置 */
body, html {
    margin: 0; padding: 0;
    /* 建议使用更现代的字体组合，这里保留原设置，你可以稍后引入 Google Fonts 的 Inter 字体 */
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
h1, h2, h3 { margin-top: 0; font-weight: 700; }
/* 让所有 H2 标题默认使用青色强调 */
h2 { color: var(--accent-cyan); }

/* 通用容器 */
.container {
    width: 90%; max-width: 1200px; margin: 0 auto; padding: 60px 0;
}
/* 页面标题区域 (增强冲击力) */
.page-header {
    background-color: var(--card-bg); padding: 120px 0 50px; /* 增加顶部内边距 */
    text-align: center; border-bottom: 3px solid var(--accent-cyan); /* 增加底部强调线 */
}
.page-header h1 {
    font-size: 3.5rem; color: var(--text-primary);
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 15px;
}
.page-header p { font-size: 1.2rem; max-width: 700px; margin: 0 auto; color: var(--text-secondary);}

/* 强调文字高亮 */
.highlight-text { color: var(--accent-orange); font-weight: bold; }

/* --- 导航栏 --- */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 5%; background-color: rgba(11, 12, 16, 0.95);
    position: fixed; width: 90%; top: 0; z-index: 100;
    border-bottom: 1px solid #1F2833; backdrop-filter: blur(10px);
}
.logo { font-weight: bold; font-size: 1.3rem; letter-spacing: 1px; text-transform: uppercase;}
.logo span { color: var(--accent-cyan); }
.nav-links a {
    margin-left: 30px; font-size: 0.95rem; font-weight: 600; color: var(--text-secondary);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a.cta {
    border: 2px solid var(--accent-orange); color: var(--accent-orange);
    padding: 8px 18px; border-radius: 4px;
}
.nav-links a.cta:hover { background-color: var(--accent-orange); color: var(--bg-color); }

/* --- 首页 Hero Section (战斗宣言版) --- */
.hero {
    height: 95vh; min-height: 600px; display: flex; align-items: center; position: relative;
    /* 保持你原有的图片链接 */
    background-image: linear-gradient(rgba(11, 12, 16, 0.5), rgba(11, 12, 16, 0.8)), url('images/ALMA-AGE-PRO-S-Dagnello-2025-protoplanetary-disk-936x600.png');
    background-size: cover; background-position: center; padding-top: 60px;
    border-bottom: 3px solid var(--accent-cyan);
}
.hero-content { width: 90%; max-width: 1200px; margin: 0 auto; }
.hero h1 {
    font-size: 4rem; line-height: 1.1; max-width: 900px; margin-bottom: 25px;
    text-transform: uppercase; letter-spacing: -0.5px;
}
.hero h1 span { color: var(--accent-cyan); }
.hero p {
    font-size: 1.4rem; color: var(--text-primary); max-width: 700px; margin-bottom: 40px;
    font-weight: 400; border-left: 4px solid var(--accent-orange); padding-left: 20px;
}
.btn {
    display: inline-block; padding: 15px 35px;
    background-color: var(--accent-orange); /* 改用更活力的橙色 */
    color: var(--bg-color); font-weight: bold; font-size: 1.1rem;
    border-radius: 4px; text-transform: uppercase; letter-spacing: 1px;
}
.btn:hover { background-color: #FF8C5F; transform: translateY(-3px); box-shadow: 0 10px 20px -10px rgba(255, 107, 53, 0.5);}

/* --- 卡片样式 (用于首页竞争优势和研究页) --- */
.cards-grid { display: flex; gap: 30px; justify-content: center; }
.card {
    background-color: var(--card-bg); padding: 40px; border-radius: 12px; flex: 1;
    border-top: 3px solid transparent; transition: 0.3s;
}
.card:hover { border-top-color: var(--accent-cyan); transform: translateY(-5px);}
.card-icon { font-size: 3rem; margin-bottom: 20px; color: var(--accent-cyan); }
.card h3 { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-primary); }

/* --- 研究页：“武器库”展示栏 --- */
.data-sources-bar {
    display: flex; justify-content: center; gap: 60px; padding: 40px 0;
    border-bottom: 2px solid #333; margin-bottom: 60px;
}
.data-source { text-align: center; color: var(--text-secondary); font-weight: bold; }
.data-source span { display: block; font-size: 2.2rem; color: var(--accent-cyan); margin-bottom: 10px; }

/* JWST logo in the data-source bar */
.data-source-logo { width: 82px; height: 82px; display: block; margin: 0 auto 10px; }

/* Accessibility helper: visually hidden but available to screen readers */
.visually-hidden {
    position: absolute !important; height: 1px; width: 1px; overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}

/* --- 团队页样式 (增强导师板块) --- */
.mentorship-quote {
    font-size: 1.3rem; font-style: italic; color: var(--text-primary);
    border-left: 4px solid var(--accent-orange); padding: 20px 30px;
    background-color: rgba(255, 107, 53, 0.1); margin: 30px auto 50px;
    max-width: 900px; border-radius: 0 8px 8px 0;
}

/* PI hero layout: photo on left, mentorship quote on right */
.pi-hero { display: flex; align-items: center; gap: 30px; justify-content: center; margin-bottom: 40px; }
.pi-card { max-width: 280px; width: 280px; text-align: left; margin: 0; }
.pi-card .member-img { height: 240px; border-bottom: none; border-radius: 8px; object-fit: cover; }
.pi-name { font-size: 1.8rem; color: var(--accent-cyan); margin: 10px 0 6px; }
.pi-title { font-weight: bold; color: var(--accent-orange); margin: 0; }
.pi-quote { flex: 1; margin: 0; max-width: 720px; }
.success-stories-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-bottom: 60px;}
.success-card {
    background-color: var(--card-bg); padding: 30px; border-radius: 8px;
    border-left: 3px solid var(--accent-cyan);
}
.success-card h3 { color: var(--accent-orange); margin-bottom: 10px; }

/* 现有团队成员网格样式调整 */
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, 280px); gap: 24px; justify-content: center; }
.member-card { background-color: var(--card-bg); border-radius: 12px; overflow: hidden; text-align: center; transition: box-shadow 220ms cubic-bezier(.2,.9,.2,1), transform 220ms cubic-bezier(.2,.9,.2,1); width: 100%;
    border: 1px solid rgba(255,255,255,0.04); /* subtle border */
    box-shadow: 0 4px 10px rgba(2,6,23,0.35); /* soft base shadow */
    border-top: 4px solid rgba(69,162,158,0.06); /* subtle cyan top accent */
}
.member-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(2,6,23,0.5); border-top-color: rgba(69,162,158,0.18); }
.member-img { width: 100%; height: 240px; object-fit: cover; background-color: #333; border-bottom: 3px solid var(--accent-cyan); display:block; }

/* PI portrait now matches other cards */
.pi-card { width: 280px; }
.pi-card .member-img { height: 240px; }
.member-info { padding: 20px; }
.member-info h3 { margin-bottom: 5px; color: var(--text-primary); font-size: 1.2rem;}
.member-info p { color: var(--text-secondary); font-size: 0.9rem; }

/* PI CV link button */
.pi-cv-link {
    display: inline-block; padding: 6px 12px; background-color: transparent;
    color: var(--accent-cyan); border: 1px solid rgba(69,162,158,0.18); border-radius: 6px; font-weight: 600;
}
.pi-cv-link:hover { background-color: rgba(69,162,158,0.08); color: var(--text-primary); border-color: rgba(69,162,158,0.28); }

/* --- 加入我们页 & 页脚 & 论文列表 (保持原样) --- */
.join-content { display: flex; gap: 50px; align-items: flex-start; }
.join-text { flex: 2; }
.join-sidebar { flex: 1; background-color: var(--card-bg); padding: 30px; border-radius: 12px; }
.checklist li { margin-bottom: 10px; }
.checklist li::before { content: "✓"; color: var(--accent-cyan); margin-right: 10px; }
footer { text-align: center; padding: 40px 0; color: var(--text-secondary); font-size: 0.9rem; border-top: 1px solid var(--card-bg); background-color: #0B0C10;}
.pub-list-container { max-width: 900px; margin: 0 auto; }
.pub-entry { display: flex; gap: 25px; margin-bottom: 30px; padding-bottom: 25px; border-bottom: 1px solid var(--card-bg); }
.pub-year { font-size: 1.4rem; font-weight: bold; color: var(--accent-cyan); min-width: 60px; text-align: right; flex-shrink: 0; }
.pub-details h3 { margin-bottom: 8px; font-size: 1.1rem; line-height: 1.4; color: var(--text-primary); }
.pub-authors { color: var(--text-secondary); margin-bottom: 5px; font-style: italic; }
.pub-authors strong { color: var(--text-primary); font-weight: bold; font-style: normal;}
.pub-journal { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; }
.ads-link-btn { display: inline-block; font-size: 0.85rem; color: var(--accent-cyan); border: 1px solid var(--accent-cyan); padding: 4px 10px; border-radius: 4px; transition: 0.3s; }
.ads-link-btn:hover { background-color: var(--accent-cyan); color: var(--bg-color); text-decoration: none; }

/* --- 手机端适配 --- */
@media (max-width: 768px) {
    .navbar { padding: 15px; } .nav-links { display: none; }
    .hero h1 { font-size: 2.8rem; } .page-header h1 { font-size: 2.5rem; }
    .cards-grid, .join-content, .mentorship-section, .success-stories-grid { flex-direction: column; }
    .data-sources-bar { gap: 30px; flex-wrap: wrap; }
    .pub-entry { flex-direction: column; gap: 5px; } .pub-year { text-align: left; font-size: 1.1rem; margin-bottom: 5px;}
    /* Stack the PI photo and quote on mobile */
    .pi-hero { flex-direction: column; align-items: center; }
    .pi-quote { max-width: 100%; }
}

/* 用于高亮 UW-Madison 作者的专门样式 */
.uw-author-highlight {
    color: var(--accent-orange) !important; /* 强制使用橙色 */
    font-weight: 700; /* 加粗 */
}