/* 粤港澳科学教育联盟官网样式表 */
/* 设计风格：现代、简洁、专业、友好，体现科技感与教育温度 */
/* 色彩方案：科技蓝为主色调，白色为背景，粤港澳三地文化元素点缀 */

:root {
    /* 主色调：科技蓝系列 */
    --primary-blue: #1a73e8;      /* 主科技蓝 */
    --deep-blue: #0d47a1;         /* 深科技蓝 */
    --light-blue: #4285f4;        /* 浅科技蓝 */
    --sky-blue: #87ceeb;          /* 天空蓝 */
    
    /* 粤港澳三地文化色彩 */
    --guangdong-red: #d32f2f;     /* 广东红（岭南文化） */
    --hongkong-purple: #7b1fa2;   /* 香港紫（紫荆花） */
    --macau-green: #388e3c;       /* 澳门绿（莲花） */
    
    /* 辅助色彩 */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --black: #212529;
    
    /* 教育温度色彩 */
    --warm-yellow: #ffb74d;       /* 温暖黄 */
    --energy-orange: #ff9800;     /* 活力橙 */
    --growth-green: #4caf50;      /* 成长绿 */
    
    /* 字体 */
    --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "PingFang SC", "Microsoft YaHei";
    --font-family-serif: Georgia, "Times New Roman", Times, serif;
    --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* 导航栏样式 - 现代简洁 */
.navbar {
    padding: var(--space-sm) 0;
    background: linear-gradient(135deg, var(--white) 0%, rgba(248, 249, 250, 0.95) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(26, 115, 232, 0.1);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.navbar-scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-blue) !important;
}

.navbar-brand small {
    font-size: 0.75rem;
    color: var(--dark-gray);
    font-weight: 400;
}

/* 导航栏Logo样式 */
.navbar-logo {
    height: 36px;
    width: auto;
    margin-right: 12px;
    object-fit: contain;
}

/* 移动端Logo调整 */
@media (max-width: 768px) {
    .navbar-logo {
        height: 32px;
        margin-right: 8px;
    }
    
    .navbar-brand h1 {
        font-size: 1rem !important;
    }
    
    .navbar-brand small {
        font-size: 0.7rem !important;
    }
}
    border-radius: var(--radius-md);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.2);
}

.nav-link {
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm) !important;
    color: var(--dark-gray) !important;
    transition: all 0.3s ease;
    border-radius: var(--radius-sm);
    margin: 0 2px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-blue) !important;
    background-color: rgba(26, 115, 232, 0.08);
    transform: translateY(-1px);
}

/* Banner轮播样式 - 科技感 */
.carousel {
    position: relative;
    margin-top: 76px;
    overflow: hidden;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.carousel-item {
    height: 85vh;
    min-height: 600px;
    background: linear-gradient(135deg, 
        rgba(26, 115, 232, 0.9) 0%,
        rgba(66, 133, 244, 0.8) 50%,
        rgba(135, 206, 235, 0.7) 100%);
    position: relative;
}

/* 粤港澳三地文化元素背景 */
.carousel-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(211, 47, 47, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(123, 31, 162, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(56, 142, 60, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.carousel-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: center;
    padding: var(--space-xl) 0;
}

.carousel-indicators button {
    width: 12px !important;
    height: 12px !important;
    border-radius: 50%;
    margin: 0 6px;
    background-color: rgba(255, 255, 255, 0.5);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.carousel-indicators button.active {
    background-color: var(--white);
    transform: scale(1.2);
}

.carousel-control-prev,
.carousel-control-next {
    width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    backdrop-filter: blur(10px);
    margin: 0 var(--space-md);
    opacity: 0.8;
    transition: all 0.3s ease;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    background-color: rgba(255, 255, 255, 0.3);
    opacity: 1;
    transform: scale(1.1);
}

/* 按钮样式 - 友好交互 */
.btn {
    border-radius: var(--radius-md);
    font-weight: 600;
    padding: var(--space-sm) var(--space-lg);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    border-color: transparent;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--deep-blue), var(--primary-blue));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--growth-green), #66bb6a);
    border-color: transparent;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #388e3c, var(--growth-green));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn-outline-primary {
    color: var(--primary-blue);
    border-color: var(--primary-blue);
    background: transparent;
}

.btn-outline-primary:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
}

/* 卡片样式 - 简洁专业 */
.card {
    border-radius: var(--radius-md);
    border: 1px solid var(--medium-gray);
    background: var(--white);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg) !important;
    border-color: var(--primary-blue);
}

.card-title {
    font-weight: 600;
    color: var(--deep-blue);
    margin-bottom: var(--space-sm);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, 
        rgba(26, 115, 232, 0.1) 0%,
        rgba(66, 133, 244, 0.05) 100%);
    border-radius: 50%;
    color: var(--primary-blue);
    position: relative;
}

.icon-wrapper::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    border-radius: 50%;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover .icon-wrapper::before {
    opacity: 1;
}

.card:hover .icon-wrapper {
    color: var(--white);
    background: transparent;
}

/* 大赛专栏样式 */
.competition-section {
    background: linear-gradient(135deg, 
        rgba(248, 249, 250, 0.8) 0%,
        rgba(255, 255, 255, 0.9) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
    position: relative;
    overflow: hidden;
}

.competition-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--guangdong-red) 0%,
        var(--primary-blue) 33%,
        var(--hongkong-purple) 66%,
        var(--macau-green) 100%);
}

/* 联盟简介样式 */
.about-section {
    padding: var(--space-xl) 0;
}

.principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.principle-item {
    padding: var(--space-md);
    background: var(--light-gray);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-blue);
    transition: all 0.3s ease;
}

.principle-item:hover {
    background: linear-gradient(135deg, 
        rgba(26, 115, 232, 0.05) 0%,
        rgba(66, 133, 244, 0.02) 100%);
    transform: translateX(8px);
    border-left-color: var(--growth-green);
}

.principle-item h5 {
    color: var(--primary-blue);
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* 最新动态样式 */
.news-section {
    background: linear-gradient(135deg, 
        rgba(248, 249, 250, 0.5) 0%,
        rgba(255, 255, 255, 0.7) 100%);
    padding: var(--space-xl) 0;
}

.news-card {
    height: 100%;
    border: none;
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

.news-card:hover {
    box-shadow: var(--shadow-md);
}

.badge {
    padding: 0.35em 0.65em;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

/* 快速链接样式 */
.quick-links {
    padding: var(--space-xl) 0;
}

.quick-link {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    border: 1px solid var(--medium-gray);
    background: var(--white);
}

.quick-link:hover {
    color: var(--primary-blue);
    transform: translateY(-10px) scale(1.05);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
}

.quick-link .card-body {
    padding: var(--space-xl) var(--space-md);
}

/* 页脚样式 - 专业友好 */
footer {
    background: linear-gradient(135deg, 
        var(--deep-blue) 0%,
        var(--primary-blue) 100%);
    color: var(--white);
    padding: var(--space-xl) 0 var(--space-md);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--guangdong-red) 0%,
        var(--white) 33%,
        var(--hongkong-purple) 66%,
        var(--macau-green) 100%);
}

footer h5 {
    color: var(--white);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    text-decoration: none;
}

footer a:hover {
    color: var(--white);
    padding-left: 4px;
}

.social-links {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .carousel-item {
        height: 70vh;
        min-height: 500px;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .lead {
        font-size: 1.1rem;
    }
    
    .principles {
        grid-template-columns: 1fr;
    }
    
    .navbar-brand small {
        display: none;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
}

@media (max-width: 576px) {
    .carousel-item {
        height: 60vh;
        min-height: 400px;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
    }
    
    .quick-link .card-body {
        padding: 1.5rem 0.5rem;
    }
    
    .icon-wrapper {
        width: 60px;
        height: 60px;
    }
    
    .icon-wrapper i {
        font-size: 2rem !important;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

/* 加载优化 */
img {
    max-width: 100%;
    height: auto;
}

.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy.loaded {
    opacity: 1;
}

/* 辅助功能 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .navbar,
    .carousel,
    footer,
    .btn,
    .social-links {
        display: none !important;
    }
    
    body {
        padding: 0;
        margin: 0;
        font-size: 12pt;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    a {
        color: var(--black) !important;
        text-decoration: underline !important;
    }
}

/* 粤港澳三地特色装饰 */
.guangdong-decoration {
    position: relative;
}

.guangdong-decoration::after {
    content: '粤';
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--guangdong-red);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.hongkong-decoration::after {
    content: '港';
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--hongkong-purple);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.macau-decoration::after {
    content: '澳';
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--macau-green);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}/* 修复固定导航栏遮挡banner的问题 */
.navbar.fixed-top + .page-header,
.navbar.fixed-top + section[class*="header"],
.navbar.fixed-top + .hero {
    margin-top: 76px !important;
}

/* 会员风采页面的特定修复 */
.navbar.fixed-top + .page-header {
    padding-top: 40px !important;
    padding-bottom: 30px !important;
}

/* 修复导航栏折叠菜单背景 - 全局 */
@media (max-width: 992px) {
    .navbar-collapse {
        background-color: white !important;
        border-radius: 8px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        margin-top: 10px;
        padding: 15px !important;
    }
    .navbar-nav .nav-item {
        margin-bottom: 8px;
    }
    .navbar-nav .nav-item:last-child {
        margin-bottom: 0;
    }
    .navbar-nav .nav-link {
        padding: 10px 15px !important;
        border-radius: 6px;
        transition: all 0.3s ease;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
        background-color: #f8f9fa;
        color: #1a73e8 !important;
    }
}

/* 确保导航栏按钮可见 */
.navbar-toggler {
    border-color: rgba(0,0,0,0.1);
}
.navbar-toggler:focus {
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.25);
}

/* 导航栏优化 - 放大logo和文字，减少留白 */
.navbar-brand {
    padding: 5px 0;
}
.navbar-brand .navbar-logo {
    height: 55px !important;  /* 放大logo */
    width: auto;
}
.navbar-brand h1 {
    font-size: 1.1rem !important;  /* 放大中文文字 */
    font-weight: 700;
    margin-bottom: 2px;
}
.navbar-brand small {
    font-size: 0.75rem;  /* 英文文字大小 */
    line-height: 1.2;
}

/* 减少导航栏内部留白 */
.navbar {
    padding-top: 8px;
    padding-bottom: 8px;
    min-height: 70px;
}
.navbar-nav .nav-link {
    padding: 8px 15px !important;
    font-weight: 500;
}

/* 移动端优化 */
@media (max-width: 992px) {
    .navbar-brand {
        padding: 3px 0;
    }
    .navbar-brand .navbar-logo {
        height: 45px !important;
    }
    .navbar-brand h1 {
        font-size: 1rem !important;
    }
    .navbar-brand small.d-md-none {
        display: block !important;  /* 确保移动端显示英文缩写 */
        font-size: 0.7rem;
    }
    .navbar {
        min-height: 65px;
    }
}

/* 页面头部优化 - 减少留白 */
/* 注意：会员风采页面有自己的margin-top设置，这里不设置全局margin-top */
.page-header {
    padding: 50px 0 25px !important;
    /* margin-top由各页面自行设置，避免冲突 */
}
.page-header h1 {
    font-size: 2.5rem;
}
.page-header .lead {
    font-size: 1.2rem;
}

/* 首页轮播图优化 */
.carousel-content {
    padding-top: 80px;
    padding-bottom: 80px;
}

/* 强制移动端显示英文名称 */
@media (max-width: 992px) {
    .navbar-brand small.text-muted.d-md-none {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
        font-size: 0.7rem;
        line-height: 1.2;
        margin-top: 2px;
        color: #6c757d !important;
    }
}

/* 确保导航栏折叠菜单在所有页面一致 */
.navbar-collapse.collapse.show {
    background-color: white !important;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-top: 10px;
    padding: 15px !important;
}

/* 统一的页面头部样式 - 确保不被导航栏遮挡 */
section.page-header,
.page-header {
    margin-top: 76px !important; /* 标准导航栏高度 */
    position: relative;
    z-index: 1;
}

/* 针对有内联样式的页面，确保优先级 */
section[style*="margin-top"] + .page-header,
.page-header[style*="margin-top"] {
    margin-top: 76px !important; /* 覆盖内联样式 */
}

/* ==================== */
/* 语言切换样式 */
/* ==================== */

.language-switcher {
    margin-right: 1rem;
}

.language-switcher .btn-language {
    background: var(--light-gray);
    border: 1px solid var(--medium-gray);
    color: var(--dark-gray);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 0.875rem;
    font-weight: 500;
}

.language-switcher .btn-language:hover {
    background: var(--medium-gray);
    border-color: var(--dark-gray);
    color: var(--black);
}

.language-switcher .btn-language.active {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

.language-switcher .btn-language:first-child {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.language-switcher .btn-language:last-child {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.language-flag {
    font-size: 1rem;
    margin-right: 0.375rem;
}

/* 移动端语言切换 */
.language-switcher-mobile .dropdown-toggle {
    padding: 0.375rem 0.75rem;
    min-width: 44px;
    background: var(--light-gray);
    border: 1px solid var(--medium-gray);
    color: var(--dark-gray);
}

.language-switcher-mobile .dropdown-toggle:hover {
    background: var(--medium-gray);
    border-color: var(--dark-gray);
}

.language-switcher-mobile .dropdown-menu {
    min-width: 140px;
}

.language-switcher-mobile .dropdown-item {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.language-switcher-mobile .dropdown-item:hover {
    background: var(--light-gray);
}

.language-switcher-mobile .dropdown-item.active {
    background: var(--primary-blue);
    color: var(--white);
}

/* 响应式调整 */
@media (max-width: 767.98px) {
    .language-switcher {
        margin-right: 0.5rem !important;
    }
    
    .language-switcher .btn-language {
        padding: 0.25rem 0.5rem;
        font-size: 0.8125rem;
    }
}

/* 语言转换加载状态 */
.language-loading {
    position: relative;
    opacity: 0.7;
    pointer-events: none;
}

.language-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid var(--primary-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: language-spin 0.6s linear infinite;
}

@keyframes language-spin {
    to { transform: rotate(360deg); }
}

/* 简繁体转换内容标记 */
[data-convert] {
    transition: opacity 0.3s ease;
}

.language-converting [data-convert] {
    opacity: 0.7;
}


/* ==================== */
/* 导航栏样式 */
/* ==================== */

/* 导航栏整体 */
#main-navbar {
    padding: 0.5rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    z-index: 1030;
}

/* 品牌Logo */
.navbar-brand {
    padding: 0;
}

.navbar-brand img {
    border-radius: 6px;
}

.navbar-brand h1 {
    color: #1a1a2e;
    font-size: 1.1rem;
    margin-bottom: 0.125rem;
}

.navbar-brand small {
    font-size: 0.7rem;
    opacity: 0.7;
}

/* 语言切换按钮 */
.language-switcher {
    margin-right: 1rem;
}

#language-buttons {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid #dee2e6;
    background: #f8f9fa;
}

.btn-language {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: none;
    border-radius: 0;
    min-width: 36px;
    background: transparent;
    color: #6c757d;
    transition: all 0.2s ease;
}

.btn-language:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #495057;
}

.btn-language.active {
    background: #1a73e8;
    color: white;
}

.btn-language:first-child {
    border-right: 1px solid #dee2e6;
}

/* 导航链接 */
.navbar-nav .nav-link {
    font-weight: 500;
    color: #495057;
    padding: 0.5rem 1rem;
    margin: 0 0.125rem;
    border-radius: 6px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.navbar-nav .nav-link:hover {
    color: #1a73e8;
    background: rgba(26, 115, 232, 0.05);
}

.navbar-nav .nav-link.active {
    color: #1a73e8;
    background: rgba(26, 115, 232, 0.1);
}

/* 移动端优化 */
@media (max-width: 991.98px) {
    .navbar-brand h1 {
        font-size: 1rem;
    }
    
    .navbar-brand small {
        display: none;
    }
    
    .language-switcher {
        margin-right: 0.5rem;
    }
    
    .navbar-nav {
        padding: 1rem 0;
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
        margin: 0.125rem 0;
    }
}

/* 桌面端大屏幕优化 */
@media (min-width: 1200px) {
    .navbar-nav .nav-link {
        padding: 0.5rem 1.25rem;
    }
}