* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    line-height: 1.8;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-attachment: fixed;
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 30%);
    pointer-events: none;
    z-index: 1;
}

.floating-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.float-item {
    position: absolute;
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.float-item:nth-child(1) {
    top: 10%;
    left: 10%;
    font-size: 40px;
    animation-delay: 0s;
    animation-duration: 25s;
}

.float-item:nth-child(2) {
    top: 60%;
    left: 80%;
    font-size: 60px;
    animation-delay: -5s;
    animation-duration: 30s;
}

.float-item:nth-child(3) {
    top: 30%;
    left: 60%;
    font-size: 35px;
    animation-delay: -10s;
    animation-duration: 22s;
}

.float-item:nth-child(4) {
    top: 80%;
    left: 30%;
    font-size: 50px;
    animation-delay: -15s;
    animation-duration: 28s;
}

.float-item:nth-child(5) {
    top: 20%;
    left: 70%;
    font-size: 45px;
    animation-delay: -8s;
    animation-duration: 24s;
}

.float-item:nth-child(6) {
    top: 70%;
    left: 15%;
    font-size: 55px;
    animation-delay: -12s;
    animation-duration: 26s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-30px) rotate(5deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(30px) rotate(-5deg);
    }
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    animation: slideDown 0.5s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(102, 126, 234, 0.2);
}

nav a {
    margin-left: 30px;
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

nav a:hover {
    color: #667eea;
}

nav a:hover::after {
    width: 100%;
}

main {
    padding: 50px 0;
    min-height: calc(100vh - 220px);
    position: relative;
    z-index: 2;
}

.article-list {
    display: grid;
    gap: 25px;
}

.article-card {
    background: rgba(255, 255, 255, 0.98);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.article-card:hover::before {
    left: 100%;
}

.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }
.article-card:nth-child(4) { animation-delay: 0.4s; }
.article-card:nth-child(5) { animation-delay: 0.5s; }
.article-card:nth-child(6) { animation-delay: 0.6s; }
.article-card:nth-child(7) { animation-delay: 0.7s; }
.article-card:nth-child(8) { animation-delay: 0.8s; }
.article-card:nth-child(9) { animation-delay: 0.9s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.2);
}

.article-card h2 {
    font-size: 22px;
    margin-bottom: 12px;
}

.article-card h2 a {
    color: #2d3748;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.article-card h2 a:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-meta {
    color: #718096;
    font-size: 14px;
    margin-bottom: 18px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.article-excerpt {
    color: #4a5568;
    line-height: 1.9;
}

.article-detail {
    background: rgba(255, 255, 255, 0.98);
    padding: 50px;
    border-radius: 24px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    animation: fadeIn 0.6s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.article-detail h1 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #2d3748;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-content {
    margin-top: 30px;
    font-size: 17px;
    line-height: 2;
    color: #4a5568;
}

.article-content h2 {
    margin: 30px 0 15px 0;
    color: #2d3748;
    font-size: 24px;
    padding-left: 15px;
    border-left: 4px solid #667eea;
}

.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 30px;
}

.article-content li {
    margin: 10px 0;
}

.article-content pre {
    background: #2d3748;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 20px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    margin-top: 40px;
    padding: 14px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    font-weight: 600;
}

.back-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

h1 {
    margin-bottom: 30px;
    color: #fff;
    font-size: 36px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

footer {
    background: rgba(45, 55, 72, 0.95);
    backdrop-filter: blur(20px);
    color: #fff;
    padding: 40px 0;
    margin-top: 50px;
    position: relative;
    z-index: 2;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin: 8px 0;
    color: #a0aec0;
}

.footer-content a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-content a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.cursor-trail {
    position: fixed;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s;
}