/* 3D交互风格 - 香槟色调 */
:root {
    --champagne: #f7e7ce;
    --champagne-dark: #e5d5b8;
    --champagne-light: #fff4e0;
    --gold: #d4af37;
    --bronze: #cd7f32;
    --text-dark: #4a4a4a;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
    background-color: var(--champagne-light);
    color: var(--text-dark);
    line-height: 1.7;
    perspective: 1000px;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--bronze);
    transition: var(--transition);
}

a:hover {
    color: var(--gold);
    text-shadow: 0 0 5px rgba(212, 175, 55, 0.3);
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 3D浮动头部 */
header {
    background: linear-gradient(135deg, var(--champagne), var(--champagne-dark));
    padding: 25px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 10px 30px var(--shadow-color);
    transform-style: preserve-3d;
    transform: translateZ(0);
    border-bottom: 1px solid var(--gold);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    transform-style: preserve-3d;
}

.logo {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(to right, var(--bronze), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px var(--shadow-color);
    transform: translateZ(20px);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
    transform: translateZ(15px);
}

nav ul li a {
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    box-shadow: 0 5px 15px var(--shadow-color);
    display: inline-block;
    transform: translateY(0) rotateX(0);
}

nav ul li a:hover {
    transform: translateY(-3px) rotateX(15deg);
    box-shadow: 0 8px 25px var(--shadow-color);
    background: rgba(255, 255, 255, 0.5);
}

/* 3D卡片内容区 */
.main-content {
    background: linear-gradient(145deg, var(--champagne), var(--champagne-light));
    padding: 40px;
    margin: 50px 0;
    border-radius: 20px;
    box-shadow: 0 20px 50px var(--shadow-color);
    transform-style: preserve-3d;
    transition: var(--transition);
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.main-content:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: 0 30px 70px var(--shadow-color);
}

.section-title {
    font-size: 28px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--gold);
    color: var(--text-dark);
    position: relative;
    transform: translateZ(10px);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: linear-gradient(to right, var(--gold), transparent);
}

/* 3D悬浮文章网格 */
.article-3d-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    transform-style: preserve-3d;
}

.article-3d-card {
    background: linear-gradient(145deg, var(--champagne-light), var(--champagne));
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 15px 35px var(--shadow-color);
    transform: translateZ(0);
    border: 1px solid rgba(212, 175, 55, 0.2);
    position: relative;
}

.article-3d-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(to right, var(--bronze), var(--gold));
}

.article-3d-card:hover {
    transform: translateY(-10px) rotateY(5deg) scale(1.02);
    box-shadow: 0 25px 60px var(--shadow-color);
}

.card-3d-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: var(--transition);
    transform-origin: top center;
}

.article-3d-card:hover .card-3d-image {
    transform: scale(1.05);
}

.card-3d-body {
    padding: 25px;
    transform-style: preserve-3d;
}

.card-3d-title {
    font-size: 20px;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--text-dark);
    transition: var(--transition);
    transform: translateZ(10px);
}

.article-3d-card:hover .card-3d-title {
    color: var(--bronze);
}

.card-3d-meta {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--bronze);
    margin-top: 20px;
    transform: translateZ(5px);
}

/* 3D分类标签 */
.category-3d-tag {
    display: inline-block;
    padding: 5px 15px;
    background: linear-gradient(to right, var(--bronze), var(--gold));
    color: white;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px var(--shadow-color);
    transform: translateZ(5px);
    transition: var(--transition);
}

.category-3d-tag:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 7px 15px var(--shadow-color);
}

/* 文章详情3D效果 */
.article-3d-detail {
    max-width: 900px;
    margin: 0 auto;
    transform-style: preserve-3d;
}

.article-3d-header {
    margin-bottom: 50px;
    text-align: center;
    transform: translateZ(15px);
}

.article-3d-title {
    font-size: 36px;
    margin-bottom: 25px;
    line-height: 1.3;
    color: var(--text-dark);
    text-shadow: 1px 1px 3px var(--shadow-color);
}

.article-3d-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: var(--bronze);
    margin-bottom: 30px;
    flex-wrap: wrap;
    transform: translateZ(10px);
}

.article-3d-image {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 40px;
    box-shadow: 0 20px 50px var(--shadow-color);
    transition: var(--transition);
    transform: rotateX(5deg);
}

.article-3d-image:hover {
    transform: rotateX(0) scale(1.01);
    box-shadow: 0 25px 60px var(--shadow-color);
}

.article-3d-content {
    line-height: 1.8;
    font-size: 18px;
    transform: translateZ(5px);
}

.article-3d-content p {
    margin-bottom: 25px;
}

.article-3d-content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 30px 0;
    box-shadow: 0 15px 40px var(--shadow-color);
    transition: var(--transition);
}

.article-3d-content img:hover {
    transform: scale(1.01) rotateZ(1deg);
}

/* 3D分页导航 */
.pagination-3d {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 50px;
    transform-style: preserve-3d;
}

.pagination-3d a {
    padding: 12px 25px;
    border-radius: 50px;
    background: linear-gradient(to right, var(--champagne), var(--champagne-dark));
    color: var(--bronze);
    font-weight: 600;
    box-shadow: 0 8px 20px var(--shadow-color);
    border: 1px solid var(--gold);
    transition: var(--transition);
    transform: rotateX(0);
}

.pagination-3d a:hover {
    transform: translateY(-5px) rotateX(15deg);
    background: linear-gradient(to right, var(--champagne-dark), var(--champagne));
    box-shadow: 0 15px 30px var(--shadow-color);
    color: var(--gold);
}

/* 3D友情链接 */
.friend-links-3d {
    background: linear-gradient(145deg, var(--champagne), var(--champagne-light));
    border-radius: 15px;
    padding: 30px;
    margin: 50px 0;
    box-shadow: 0 20px 50px var(--shadow-color);
    transform-style: preserve-3d;
    transition: var(--transition);
}

.friend-links-3d:hover {
    transform: rotateY(5deg);
}

.friend-links-3d h3 {
    margin-bottom: 25px;
    color: var(--text-dark);
    font-size: 22px;
    transform: translateZ(10px);
}

.friend-links-3d-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    transform: translateZ(5px);
}

.friend-links-3d-container a {
    padding: 10px 20px;
    background: linear-gradient(to right, var(--champagne-light), var(--champagne));
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid rgba(212, 175, 55, 0.3);
    transition: var(--transition);
}

.friend-links-3d-container a:hover {
    transform: translateY(-3px) rotateY(10deg);
    background: linear-gradient(to right, var(--champagne), var(--champagne-dark));
    box-shadow: 0 10px 25px var(--shadow-color);
    color: var(--gold);
}

/* 3D页脚 */
footer {
    background: linear-gradient(135deg, var(--champagne-dark), var(--champagne));
    padding: 40px 0;
    text-align: center;
    margin-top: 70px;
    box-shadow: 0 -10px 30px var(--shadow-color);
    border-top: 1px solid var(--gold);
    transform-style: preserve-3d;
}

.copyright {
    font-size: 14px;
    color: var(--text-dark);
    transform: translateZ(10px);
}

/* 3D动画效果 */
@keyframes float {
    0%, 100% {
        transform: translateY(0) rotateX(0);
    }
    50% {
        transform: translateY(-10px) rotateX(5deg);
    }
}

/* 响应式设计 */
@media (max-width: 992px) {
    .header-content {
        flex-direction: column;
        gap: 25px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .article-3d-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .article-3d-title {
        font-size: 30px;
    }
}

@media (max-width: 768px) {
    nav ul li a {
        padding: 8px 15px;
        font-size: 14px;
    }
    
    .main-content {
        padding: 30px;
    }
    
    .article-3d-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .article-3d-meta {
        gap: 15px;
    }
    
    .pagination-3d {
        flex-direction: column;
        align-items: center;
    }
    
    .pagination-3d a {
        width: 100%;
        text-align: center;
        margin-bottom: 10px;
    }
}