:root {
    --primary-glow: #00ffff;
    --secondary-glow: #00bfff;
    --bg-dark: #0a192f;
    --card-bg: rgba(15, 35, 70, 0.6);
    --text-main: #e0f7fa;
    --text-muted: #88d4f5;
}
body {
    background: linear-gradient(135deg, #001e3c 0%, #0a192f 50%, #00122b 100%);
    color: var(--text-main);
    font-family:'Rajdhani', 'Arial Narrow', sans-serif;
    min-height: 100vh;
    position: relative;
}
/* 背景粒子光点（钢铁侠HUD风格） */
 body::before {
    content:'';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(0, 191, 255, 0.1) 0%, transparent 30%), radial-gradient(circle at 80% 20%, rgba(0, 255, 255, 0.15) 0%, transparent 40%), radial-gradient(circle at 50% 50%, rgba(0, 191, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}
/* 英雄区 - 像头盔启动 */
 .hero {
    padding: 10rem 0 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::after {
    z-index:-1;
    content:'';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
    transform: translate(-50%, -50%);
    opacity: 0.3;
    animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.5;
    }
}
/* 导航栏 - 透明 + 辉光下边框 */
 .navbar {
    background: rgba(10, 25, 50, 0.7) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--primary-glow);
    box-shadow: 0 4px 20px rgba(0, 255, 255, 0.2);
}
.nav-link {
    color: var(--text-main) !important;
    text-shadow: 0 0 8px var(--primary-glow);
    transition: all 0.3s;
}
.nav-link:hover {
    color: var(--primary-glow) !important;
    text-shadow: 0 0 15px var(--primary-glow);
}
.navbar-brand {
    padding: 0;
    transition: all 0.5s ease;
    position: relative;
}
.navbar-brand img {
    height: 40px;
    /* 圆形更科技感，可改成 8px 如果想方角 */
    filter: drop-shadow(0 0 10px var(--primary-glow)) brightness(1.2);
    /* 关键：辉光投影 + 提亮 */
    transition: all 0.5s ease;
}
/* 悬停：辉光脉冲 + 放大 + 弧反应堆光环 */
 .navbar-brand:hover img {
    transform: scale(1.15);
    filter: drop-shadow(0 0 20px var(--primary-glow)) drop-shadow(0 0 40px var(--primary-glow)) brightness(1.4);
    animation: logo-glow-pulse 1.8s ease-in-out infinite alternate;
}
@keyframes logo-glow-pulse {
    from {
        filter: drop-shadow(0 0 20px var(--primary-glow)) drop-shadow(0 0 40px var(--primary-glow)) brightness(1.4);
    }
    to {
        filter: drop-shadow(0 0 30px var(--primary-glow)) drop-shadow(0 0 60px var(--primary-glow)) brightness(1.5);
    }
}
/* 光环背景（可选，增强弧反应堆感） */
 .navbar-brand::after {
    content:'';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    border-radius: 50%;
    transition: opacity 0.5s;
    pointer-events: none;
}
.navbar-brand:hover::after {
    opacity: 0.4;
}
.navbar-toggler {
    border: none;
    padding: 0.5rem;
}
.navbar-toggler:focus {
    box-shadow: none;
  }
.navbar-toggler-icon {
    width: 30px;
    height: 24px;
    position: relative;
    background: transparent;
}
.navbar-toggler-icon::before, .navbar-toggler-icon::after, .navbar-toggler-icon span {
    content:'';
    position: absolute;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-glow);
    border-radius: 2px;
    box-shadow: 0 0 12px var(--primary-glow);
    transition: all 0.4s;
}
.navbar-toggler-icon span {
    top: 10px;
}
.navbar-toggler-icon::before {
    top: 0;
}
.navbar-toggler-icon::after {
    bottom: 0;
}
.navbar-toggler:hover .navbar-toggler-icon::before, .navbar-toggler:hover .navbar-toggler-icon::after, .navbar-toggler:hover .navbar-toggler-icon span {
    box-shadow: 0 0 20px var(--primary-glow);
    transform: scaleX(1.1);
}
.hero h1 {
    font-size: 5rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--secondary-glow);
    letter-spacing: 0.2em;
}
.hero .lead {
    font-size: 1.6rem;
    color: var(--text-muted);
    text-shadow: 0 0 10px var(--primary-glow);
}
/* 文章卡片 - 全息投影感 */
 .article-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2.5rem;
    transition: all 0.5s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}
.article-card::before {
    content:'';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.1), transparent);
    transition: left 0.8s;
}
.article-card:hover::before {
    left: 100%;
}
.article-card:hover {
    border-color: var(--primary-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 255, 255, 0.4);
}
.article-title a {
    font-size: 2.1rem;
    font-weight: 600;
    color: white;
    text-decoration: none;
    text-shadow: 0 0 10px var(--primary-glow);
    transition: all 0.3s;
}
.article-title a:hover {
    color: var(--primary-glow);
    text-shadow: 0 0 25px var(--primary-glow);
}
.article-summary {
    color: var(--text-muted);
    line-height: 1.8;
    margin: 1.5rem 0;
}
.article-summary a {
    color: var(--primary-glow);
    text-decoration: none;
    text-shadow: 0 0 8px var(--primary-glow), 0 0 15px rgba(0, 255, 255, 0.4);
    transition: all 0.4s ease;
}
.article-summary a:hover {
    text-shadow: 0 0 15px var(--primary-glow), 0 0 30px var(--primary-glow), 0 0 45px rgba(0, 255, 255, 0.8);
    transform: scale(1.1);
}
.avatar {
    width: 48px;
    height: 48px;
    border: 2px solid var(--primary-glow);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    transition: all 0.4s;
}
.avatar:hover {
    box-shadow: 0 0 25px var(--primary-glow);
    transform: scale(1.1);
}
.author-name {
    color: var(--text-main);
    /* 与正文颜色一致，纯白/浅青 */
    text-shadow: 0 0 8px var(--primary-glow), 0 0 15px rgba(0, 255, 255, 0.3);
    /* 蓝色辉光阴影 */
    transition: all 0.4s ease;
    position: relative;
}
.author-name:hover {
    color: var(--primary-glow);
    /* 悬停时变成亮青 */
    text-shadow: 0 0 15px var(--primary-glow), 0 0 30px var(--primary-glow);
    transform: scale(1.05);
    /* 轻微放大，像被Jarvis扫描 */
}
/* 可选：给整个作者链接区域加悬停辉光 */
 .author-link:hover .author-name {
    text-shadow: 0 0 20px var(--primary-glow);
}
.author-link:hover .avatar {
    box-shadow: 0 0 30px var(--primary-glow);
    transform: scale(1.15);
}
.article-tag a {
    color: var(--primary-glow);
    /* 亮青色文字 */
    padding: 0.3rem 0.8rem;
    /* 标签间距 */
    border-radius: 20px;
    /* 保持圆润感，但无边框 */
    text-shadow: 0 0 8px var(--primary-glow), 0 0 15px rgba(0, 255, 255, 0.4);
    /* 蓝色辉光阴影 */
    transition: all 0.4s ease;
    background: none !important;
    /* 强制无背景 */
    border: none !important;
    /* 强制无边框 */
    display: inline-block;
}
.article-tag a:hover {
    color: white;
    text-shadow: 0 0 15px var(--primary-glow), 0 0 30px var(--primary-glow), 0 0 45px rgba(0, 255, 255, 0.8);
    transform: translateY(-2px) scale(1.05);
    /* 轻微上浮 + 放大，像被激活 */
}
.pagination {
    gap: 1rem;
    /* 按钮间距更大 */
}
.pagination .page-link {
    background: rgba(15, 35, 70, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--primary-glow);
    color: var(--text-main);
    border-radius: 50px!important;
    /* 更圆润的胶囊形 */
    text-shadow: 0 0 8px var(--primary-glow);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
    transition: all 0.4s ease;
}
.pagination .page-link:hover {
    background: rgba(0, 255, 255, 0.2);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 0 30px var(--primary-glow);
}
.pagination .page-item.disabled .page-link {
    background: rgba(10, 20, 40, 0.8);
    border-color: rgba(0, 255, 255, 0.2);
    color: #88d4f5;
    opacity: 0.7;
    box-shadow: none;
}
.pagination .page-item.active .page-link {
    background: var(--primary-glow);
    color: #001e3c;
    box-shadow: 0 0 40px var(--primary-glow);
}
/* 返回顶部 - 掌心炮风格 */
 #backToTop {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 60px;
    height: 60px;
    background: rgba(0, 191, 255, 0.2);
    border: 2px solid var(--primary-glow);
    border-radius: 50%;
    color: var(--primary-glow);
    font-size: 1.8rem;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
    transition: all 0.4s;
    z-index: 1000;
    display: none;
    backdrop-filter: blur(5px);
}
#backToTop:hover {
    background: var(--primary-glow);
    color: #001e3c;
    transform: scale(1.2);
    box-shadow: 0 0 50px var(--primary-glow);
}
/* 页脚 */
 footer {
    background: rgba(10, 25, 50, 0.8);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--primary-glow);
    padding: 3rem 0;
    margin-top: 5rem;
    color: var(--text-muted);
    box-shadow: 0 -4px 20px rgba(0, 255, 255, 0.2);
}