/* style.css */

:root {
    --primary: #2c3e50;       /* 深色主调 */
    --accent: #3498db;        /* 亮蓝强调色 */
    --bg-sidebar: #f8f9fa;    /* 侧边栏背景 */
    --bg-content: #ffffff;    /* 内容背景 */
    --text-main: #222;        /* 正文颜色（加深） */
    --text-light: #555;       /* 辅助文字颜色 */
    --border-color: #e9ecef;
}

* { box-sizing: border-box; }

body {
    /* 基础字体调大到 18px (1.125rem)，行高增加 */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
    font-size: 1.125rem; 
    line-height: 1.7; 
}

a { text-decoration: none; color: var(--accent); transition: color 0.2s; }
a:hover { color: #1d6fa5; text-decoration: underline; }

/* --- 侧边栏 --- */
.sidebar {
    width: 300px; /* 稍微加宽 */
    background-color: var(--bg-sidebar);
    padding: 50px 35px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.profile-name {
    font-size: 2.2rem; /* 名字加大 */
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 10px;
    line-height: 1.1;
}

.profile-role {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 30px;
    font-weight: 500;
}

.contact-info {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 50px;
    line-height: 1.8;
}
.contact-info .email { display: block; font-family: monospace; }

/* 导航菜单 */
.nav-links { list-style: none; padding: 0; margin: 0; flex-grow: 1; }
.nav-links li { margin-bottom: 18px; }
.nav-links a {
    color: var(--primary);
    font-weight: 600;
    font-size: 1.25rem; /* 菜单字体加大 */
    display: block;
    padding: 5px 0;
}
.nav-links a:hover { color: var(--accent); padding-left: 8px; text-decoration: none; }
.nav-links a.active { color: var(--accent); border-right: 3px solid var(--accent); } /* 当前页面高亮 */

/* --- 右侧内容 --- */
.main-content {
    flex: 1;
    margin-left: 300px;
    padding: 80px 100px; /* 增加内边距，更有呼吸感 */
    background-color: var(--bg-content);
    max-width: 1200px; /* 防止在大屏幕上太宽 */
}

.section-title {
    font-size: 2.2rem; /* 标题加大 */
    color: var(--primary);
    border-bottom: 3px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 40px;
    margin-top: 0;
}

/* --- 组件样式 --- */
.edu-item {
    margin-bottom: 30px;
    padding-left: 20px;
    border-left: 4px solid var(--border-color);
}
.edu-school { font-weight: 700; font-size: 1.3rem; color: var(--primary); }
.edu-meta { color: var(--text-light); font-size: 1.05rem; margin-top: 5px; }

.paper-grid { display: grid; grid-template-columns: 1fr; gap: 25px; }
.paper-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: transform 0.2s;
}
.paper-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.paper-title { font-weight: 700; font-size: 1.3rem; margin-bottom: 10px; color: var(--primary); line-height: 1.4; }
.paper-authors { font-style: italic; color: #666; font-size: 1.05rem; margin-bottom: 12px; }
.paper-status {
    display: inline-block; padding: 4px 10px; border-radius: 5px;
    font-size: 0.9rem; font-weight: 600; background-color: #f0f0f0; color: #555;
}
.status-arxiv { background-color: #e3f2fd; color: #1565c0; }
.status-prep { background-color: #fff3e0; color: #e65100; }

/* 列表样式 */
ul.modern-list { list-style: none; padding: 0; }
ul.modern-list li { margin-bottom: 25px; position: relative; padding-left: 30px; }
ul.modern-list li::before {
    content: "•"; color: var(--accent); font-weight: bold;
    font-size: 1.5em; position: absolute; left: 0; top: -5px;
}
.list-header { font-weight: 700; color: var(--primary); font-size: 1.15rem; }
.list-details { font-size: 1.05rem; color: var(--text-light); display: block; margin-top: 4px; }
.list-date { font-size: 0.95rem; color: var(--text-light); font-weight: normal; margin-left: 8px; }

/* Unified content-link treatment for research/talk lists. */
.modern-list .list-details a {
    color: #1d6fa5;
    text-decoration: none;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}
.modern-list .list-details a:hover,
.modern-list .list-details a:focus-visible {
    color: var(--primary);
    text-decoration: underline;
}
.modern-list .list-details a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Teaching: restrained academic table styling. */
.teaching-subtitle {
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 30px;
    margin-bottom: 12px;
}
.teaching-subtitle + .teaching-table + .teaching-subtitle {
    margin-top: 60px;
}
.teaching-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
    margin-top: 10px;
    font-size: 1.05rem;
}
.teaching-table th,
.teaching-table td {
    text-align: left;
    vertical-align: top;
    padding: 14px 16px 14px 0;
    border-bottom: 1px solid var(--border-color);
}
.teaching-table th:last-child,
.teaching-table td:last-child {
    padding-right: 0;
}
.teaching-table th {
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 600;
    border-bottom: 1px solid #cfd6dc;
}
.teaching-table td strong {
    color: var(--primary);
    font-weight: 700;
}

/* 移动端适配 */
@media (max-width: 900px) {
    body { flex-direction: column; }
    /* Compact header on phones and tablets; desktop sidebar is unchanged. */
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 24px 20px 18px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .sidebar .profile-avatar { display: none; }
    .sidebar .profile-name {
        font-size: 1.8rem;
        line-height: 1.2;
        margin-bottom: 6px;
    }
    .sidebar .contact-info {
        font-size: 0.85rem;
        line-height: 1.6;
        margin-bottom: 16px;
    }
    .sidebar .email { overflow-wrap: anywhere; }
    .sidebar .nav-links {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px 20px;
        width: 100%;
        max-width: 32rem;
        margin: 0 0 10px;
        flex-grow: 0;
    }
    .sidebar .nav-links li { margin: 0; min-width: 0; }
    .sidebar .nav-links a {
        display: flex;
        align-items: center;
        min-height: 44px;
        padding: 8px 0;
        font-size: 1.05rem;
        line-height: 1.35;
        overflow-wrap: anywhere;
        text-underline-offset: 4px;
        text-decoration-thickness: 1px;
    }
    .sidebar .nav-links a:hover { padding-left: 0; }
    .sidebar .nav-links a.active {
        border-right: none;
        color: var(--accent);
        text-decoration-line: underline;
    }
    .sidebar .nav-links a:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }
    .main-content { margin-left: 0; padding: 28px 20px; }
    .teaching-table { font-size: 0.95rem; }
    .teaching-table th, .teaching-table td { padding: 11px 8px 11px 0; }
    .teaching-table th { font-size: 0.9rem; }
}

@media (max-width: 600px) {
    .teaching-subtitle {
        font-size: 1.2rem;
        line-height: 1.4;
    }

    .teaching-table,
    .teaching-table tbody,
    .teaching-table tr {
        display: block;
        width: 100%;
    }

    .teaching-table thead {
        display: none;
    }

    .teaching-table tr {
        padding: 14px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .teaching-table td {
        display: grid;
        grid-template-columns: 72px minmax(0, 1fr);
        column-gap: 12px;
        width: 100%;
        padding: 2px 0;
        border-bottom: 0;
        overflow-wrap: anywhere;
    }

    .teaching-table td::before {
        content: attr(data-label);
        color: var(--text-light);
        font-size: 0.82rem;
        font-weight: 600;
    }

    .teaching-table td:first-child {
        display: block;
        padding-bottom: 7px;
    }

    .teaching-table td:first-child::before {
        content: none;
    }
}

/* --- Language Toggle Button --- */
.lang-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 5px 15px;
    border: 1px solid var(--primary);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s;
}

.lang-btn:hover {
    background-color: var(--primary);
    color: #fff;
    text-decoration: none;
}
/* --- 神秘气泡按钮 (Mystery Bubble) --- */
.mystery-bubble {
    display: block;             /* 独占一行 */
    margin-top: 15px;           /* 与上方菜单的距离 */
    padding: 8px 15px;
    border-radius: 25px;        /* 圆润的气泡形状 */
    background-color: #f0f2f5;  /* 默认浅灰背景 */
    color: #333;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    
    /* --- 核心模糊特效 --- */
    filter: blur(4px);          /* 默认模糊 4px，看不清字 */
    opacity: 0.4;               /* 默认半透明，很低调 */
    transform: scale(0.95);     /* 稍微缩小 */
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1); /* 平滑过渡动画 */
}

/* 鼠标悬停时的状态 */
.mystery-bubble:hover {
    filter: blur(0);            /* 清除模糊，变清晰 */
    opacity: 1;                 /* 完全不透明 */
    transform: scale(1.05);     /* 微微放大，有弹性感 */
    background-color: var(--accent); /* 变成主题蓝色 */
    color: white;               /* 文字变白 */
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3); /* 添加光晕 */
}
/* --- 侧边栏头像样式 --- */
.profile-avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    margin: 0 auto 20px auto;
    display: block;
}


/* --- Research page: restrained publication list --- */
/* Keep these rules scoped to Research. !important only overrides existing
   inline presentation and status colours; all HTML content stays unchanged. */
.research-profiles {
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 24px !important;
}

.research-profiles .paper-status {
    padding: 0 !important;
    border-radius: 0;
    background: transparent;
    font-size: 0.95rem;
    font-weight: 400;
}

.research-profiles .paper-status span {
    filter: grayscale(1);
}

.research-profiles + .paper-grid {
    display: block;
}

.research-profiles + .paper-grid .paper-card {
    position: relative;
    margin: 0 0 25px;
    padding: 0 0 0 30px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    transform: none;
    transition: none;
}

/* Match the marker and indentation used by .modern-list in Theses and Talks. */
.research-profiles + .paper-grid .paper-card::before {
    content: "•";
    color: var(--accent);
    font-weight: bold;
    font-size: 1.5em;
    position: absolute;
    left: 0;
    top: -5px;
}

.research-profiles + .paper-grid .paper-card:last-child {
    margin-bottom: 0;
}

.research-profiles + .paper-grid .paper-title {
    margin-bottom: 8px;
    font-size: 1.15rem;
    line-height: 1.7;
}

.research-profiles + .paper-grid .paper-card > div:last-child {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 6px 18px;
}

.research-profiles + .paper-grid .paper-status {
    margin-left: 0 !important;
    padding: 0;
    border: 0 !important;
    border-radius: 0;
    background: transparent !important;
    color: var(--text-light) !important;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.6;
}

/* One link treatment across profiles, publications, and theses. */
.research-profiles a,
.research-profiles + .paper-grid .paper-card a,
.research-profiles ~ .modern-list a {
    color: #1d6fa5 !important;
    text-decoration: none !important;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.research-profiles a:hover,
.research-profiles + .paper-grid a:hover,
.research-profiles ~ .modern-list a:hover,
.research-profiles a:focus-visible,
.research-profiles + .paper-grid a:focus-visible,
.research-profiles ~ .modern-list a:focus-visible {
    color: var(--primary) !important;
    text-decoration: underline !important;
}

.research-profiles a:focus-visible,
.research-profiles + .paper-grid a:focus-visible,
.research-profiles ~ .modern-list a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.research-profiles ~ h3 {
    color: var(--primary) !important;
}

.research-profiles ~ .modern-list .list-date {
    color: var(--text-light);
}