/* 创新极简风格 - 暗白主题 */
:root {
    --bg-color: #1a1a1a;
    --card-bg: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --accent: #ff4d4d;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
}

/* 创新的无边框导航 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    background-color: transparent;
    transition: var(--transition);
}

header.scrolled {
    background-color: rgba(255,255,255,0.96);
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--card-bg);
    transition: var(--transition);
}

header.scrolled .logo {
    color: var(--text-dark);
}

/* 创新的点线导航菜单 */
.nav-dots {
    display: flex;
    gap: 25px;
}

.nav-dots li {
    list-style: none;
    position: relative;
}

.nav-dots a {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--card-bg);
    transition: var(--transition);
    position: relative;
}

header.scrolled .nav-dots a {
    background-color: var(--text-light);
}

.nav-dots a:hover {
    transform: scale(1.8);
    background-color: var(--accent);
}

.nav-dots a::after {
    content: attr(data-title);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 150%;
    font-size: 12px;
    color: var(--card-bg);
    opacity: 0;
    transition: var(--transition);
    white-space: nowrap;
    font-weight: 600;
}

header.scrolled .nav-dots a::after {
    color: var(--text-dark);
}

.nav-dots a:hover::after {
    opacity: 1;
    top: 120%;
}

/* 创新的内容容器 */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 30px 50px;
}

/* 创新的卡片堆叠布局 */
.card-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    perspective: 2000px;
}

.card {
    background: var(--card-bg);
    border-radius: 0;
    padding: 0;
    transition: var(--transition);
    transform-style: preserve-3d;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--accent), #ff8c66);
}

.card-content {
    padding: 30px;
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-image {
    transform: scale(1.05);
}

.card-title {
    font-size: 20px;
    margin: 20px 0 10px;
    font-weight: 700;
    line-height: 1.4;
}

.card-excerpt {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 15px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-light);
    border-top: 1px solid #eee;
    padding-top: 15px;
}

/* 创新的分类展示 */
.category-bubble {
    position: relative;
    margin-bottom: 60px;
}

.bubble-title {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--card-bg);
    margin-bottom: 20px;
    display: inline-block;
    padding: 8px 15px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 20px;
}

/* 创新的文章详情页 */
.article-hero {
    height: 70vh;
    min-height: 500px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: flex-end;
    margin-bottom: 80px;
}

.article-hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, var(--bg-color), transparent);
}

.article-header {
    position: relative;
    z-index: 2;
    padding: 0 30px 60px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.article-title {
    font-size: 42px;
    color: var(--card-bg);
    margin-bottom: 20px;
    line-height: 1.3;
    font-weight: 800;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 25px;
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    margin-bottom: 30px;
}

.article-meta a {
    color: var(--card-bg);
    font-weight: 600;
}

.article-meta a:hover {
    color: var(--accent);
}

.article-body {
    max-width: 700px;
    margin: 0 auto 80px;
    padding: 0 30px;
}

.article-content {
    font-size: 18px;
    line-height: 1.9;
    color: var(--text-dark);
}

.article-content p {
    margin-bottom: 30px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    margin: 40px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* 创新的分页控件 */
.pagination {
    display: flex;
    justify-content: center;
    margin: 80px 0;
}

.pagination a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    margin: 0 10px;
    background-color: var(--card-bg);
    color: var(--text-dark);
    font-weight: 700;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pagination a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--accent);
    transform: translateY(100%);
    transition: var(--transition);
    z-index: -1;
}

.pagination a:hover {
    color: var(--card-bg);
}

.pagination a:hover::before {
    transform: translateY(0);
}

/* 创新的友情链接 */
.link-cloud {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.link-cloud h3 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--card-bg);
    margin-bottom: 30px;
}

.link-cloud a {
    display: inline-block;
    padding: 8px 15px;
    margin: 5px;
    background-color: rgba(255,255,255,0.1);
    color: var(--card-bg);
    border-radius: 20px;
    transition: var(--transition);
    font-size: 14px;
}

.link-cloud a:hover {
    background-color: var(--accent);
    color: var(--card-bg);
    transform: translateY(-3px);
}

/* 创新的页脚 */
footer {
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.footer-logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--card-bg);
    margin-bottom: 30px;
    display: inline-block;
}

.copyright {
    color: rgba(255,255,255,0.5);
    font-size: 13px;
}

/* 创新的响应式设计 */
@media (max-width: 768px) {
    .header-container {
        padding: 0 20px;
    }
    
    .nav-dots {
        gap: 15px;
    }
    
    .main-container {
        padding: 80px 20px 30px;
    }
    
    .article-title {
        font-size: 32px;
    }
    
    .article-hero {
        height: 60vh;
        min-height: 400px;
    }
    
    .card-stack {
        grid-template-columns: 1fr;
    }
}

/* 创新的滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-card {
    animation: fadeInUp 0.6s forwards;
    opacity: 0;
}

/* 为每个卡片设置不同的动画延迟 */
.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }