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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: white;
    min-height: 100vh;
    color: #333;
    overflow-x: hidden;
}

/* 浮出式动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 带缩放效果的浮出动画 */
@keyframes fadeInUpScale {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.2s;
}

/* 卡片部分样式 */
.card-section {
    text-align: center;
    margin-bottom: 60px;
    padding: 40px 20px;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 15px;
    margin: 40px auto;
    max-width: 900px;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.4s;
}

.card-section h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 30px;
    font-weight: 700;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.6s;
}

.card-container {
    perspective: 1500px;
    margin: 40px auto;
    max-width: 400px;
    position: relative;
    opacity: 0;
    transform: translateY(40px) scale(0.95);
    animation: fadeInUpScale 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.8s;
}

.card {
    width: 400px;
    height: 300px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.05s ease;
    cursor: grab;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    transform: rotateX(0deg) rotateY(0deg);
}

.card:active {
    cursor: grabbing;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.3);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background: white;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.1);
}

.card-front {
    transform: rotateY(0deg);
}

.card-back {
    transform: rotateY(180deg);
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    border-radius: 15px;
    user-drag: none;
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.card-title {
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    color: #2c3e50;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 1.2rem;
    font-weight: bold;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.card-info {
    background: white;
    padding: 25px;
    border-radius: 15px;
    margin-top: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 1.1s;
}

.card-info p {
    margin: 10px 0;
    font-size: 1rem;
}

.card-info code {
    background: #e9ecef;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
}

/* Markdown部分样式 */
.markdown-section {
    background: white;
    border-radius: 15px;
    padding: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 40px auto;
    max-width: 900px;
    border: 1px solid #e9ecef;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.9s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 1.3s;
}

.markdown-section h2 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 1.5s;
}

.markdown-container {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 1.7s;
}

/* Markdown内容样式 */
.markdown-container h1,
.markdown-container h2,
.markdown-container h3,
.markdown-container h4,
.markdown-container h5,
.markdown-container h6 {
    color: #212529;
    margin: 24px 0 16px 0;
    font-weight: 600;
}

.markdown-container h1 {
    font-size: 2em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}

.markdown-container h2 {
    font-size: 1.5em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}

.markdown-container p {
    margin: 16px 0;
}

.markdown-container a {
    color: #0366d6;
    text-decoration: none;
}

.markdown-container a:hover {
    text-decoration: underline;
}

.markdown-container ul,
.markdown-container ol {
    padding-left: 2em;
    margin: 16px 0;
}

.markdown-container li {
    margin: 8px 0;
}

.markdown-container code {
    background: rgba(27, 31, 35, 0.05);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;
    font-size: 85%;
}

.markdown-container pre {
    background: #f6f8fa;
    border-radius: 6px;
    padding: 16px;
    overflow: auto;
    margin: 16px 0;
}

.markdown-container pre code {
    background: transparent;
    padding: 0;
    font-size: 100%;
}

.markdown-container blockquote {
    border-left: 4px solid #dfe2e5;
    padding: 0 1em;
    color: #6a737d;
    margin: 16px 0;
}

.markdown-container img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 16px 0;
}

.markdown-container table {
    border-collapse: collapse;
    width: 100%;
    margin: 16px 0;
}

.markdown-container table th,
.markdown-container table td {
    border: 1px solid #dfe2e5;
    padding: 6px 13px;
    text-align: left;
}

.markdown-container table th {
    background: #f6f8fa;
    font-weight: 600;
}

.markdown-container table tr:nth-child(2n) {
    background: #f6f8fa;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .card-section h1 {
        font-size: 2rem;
    }

    .card-container {
        max-width: 300px;
    }

    .card {
        width: 300px;
        height: 225px;
    }

    .markdown-section {
        padding: 20px;
    }

    .markdown-section h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .card-container {
        max-width: 250px;
    }

    .card {
        width: 250px;
        height: 187px;
    }

    .card-title {
        font-size: 1rem;
        padding: 8px 16px;
    }
}