/* ============================================
   AU Journal - Header & Quote Section Fixes
   Science期刊风格的导航栏和引言区域
   ============================================ */

/* ---------- HEADER FIX: 完美垂直居中 ---------- */
.au-header {
    background: #000;
    color: #fff;
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 60px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.au-header .au-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.au-header .au-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

/* 左侧导航区 */
.au-nav-left {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1;
}

.au-nav-left .au-nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.2s;
    padding: 4px 0;
}

.au-nav-left .au-nav-link:hover {
    color: #fff;
}

/* 中间Logo区 - 绝对居中 */
.au-nav-center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.au-logo-link-center {
    text-decoration: none;
    color: #fff;
}

.au-logo-text-center {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* 右侧操作区 */
.au-nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    justify-content: flex-end;
}

.au-nav-search-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    cursor: pointer;
    padding: 8px;
    transition: color 0.2s;
}

.au-nav-search-btn:hover {
    color: #fff;
}

.au-nav-link-small {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.2s;
    padding: 4px 8px;
}

.au-nav-link-small:hover {
    color: #fff;
}

.au-btn-submit-header {
    background: #fff;
    color: #000;
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.2s;
}

.au-btn-submit-header:hover {
    background: #f0f0f0;
}

.au-nav-lang-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.9);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.au-nav-lang-btn:hover {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}

/* 用户菜单样式 */
.au-user-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.au-user-name {
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    font-weight: 500;
}

/* ---------- QUOTE SECTION: Science期刊风格 ---------- */
.au-hero-quote {
    background: #fff;
    padding: 80px 0;
    margin-top: 60px;
}

.au-quote-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: 0 24px;
}

/* 移除旧的引号图标 */
.au-quote-icon {
    display: none;
}

/* 英文引言 - 大字在上 */
.au-quote-text {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 32px;
    line-height: 1.4;
    color: #222;
    font-weight: 400;
    margin: 0 0 20px 0;
    padding: 0;
    border: none;
    quotes: none;
}

.au-quote-text::before,
.au-quote-text::after {
    content: '';
}

/* 中文翻译 - 小字在下 */
.au-quote-author {
    font-family: 'Noto Serif SC', 'SimSun', serif;
    font-style: normal;
    font-size: 16px;
    line-height: 1.6;
    color: #666;
    font-weight: 400;
    display: block;
    margin-top: 20px;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
    .au-nav-left,
    .au-nav-center,
    .au-nav-right {
        flex: none;
    }
    
    .au-nav-center {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .au-quote-text {
        font-size: 28px;
    }
    
    .au-quote-author {
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    .au-header {
        height: 56px;
    }
    
    .au-header .au-nav {
        height: 56px;
    }
    
    .au-nav-left .au-nav-link {
        display: none;
    }
    
    .au-nav-left .au-nav-link:first-child {
        display: block;
    }
    
    .au-logo-text-center {
        font-size: 18px;
    }
    
    .au-hero-quote {
        padding: 60px 0;
    }
    
    .au-quote-text {
        font-size: 24px;
    }
    
    .au-quote-author {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .au-quote-text {
        font-size: 20px;
    }
    
    .au-quote-author {
        font-size: 13px;
    }
}