body{  
background: linear-gradient(135deg,#f5f7fa 0%, #c3cfe2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif
        line-height 1.6em;
        margin: 0;
        min-height: 100vh;
        padding: 20px;
        background-image: url(背景.jpg);
        background-size: auto;
        background-repeat: repeat;
        background-color: #f5f5f5;
    }
.content-card{
    max-width: 800px;
    width: 100%;
    background-color: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 40px;
    margin: 20px auto;
    transition: transform 0.3s ease;}
.content-card:hover{
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15)}
h1{
    color: var(--primary-dark);
    font-size: 3em;
    margin: 0 0 10px 0;
    margin-bottom: 0;
    border-left: 8px solid var(--primary);
    padding-left: 20px;
    text-shadow: 3px 3px 0 rgba(229, 62,126, 0.1);
    letter-spacing: 1px;
}
h2{
    color: var(--text-dark);
    font-size: 2.2em;
    font-weight: 300;
    margin: 0 0 30px 20px;
    position: relative;
    display: inline-block;
    margin-top: 10px;
    margin-bottom: 30px;
}
h2::after {
    content: "";
    position: absolute;
    display: block;
    right: -40px;
    top: 0;
    font-size: 1.2em;
    opacity: 0;
    transition: opacity 0.3s;
    width: 60px;
    height: 3px;
    background: #ff6b6b;
    margin-top: 10px;
}
h2:hover::after{
    opacity: 1;
    animation: sparkle 0.8s infinite;
}
p{
    color: var(--text-light);
    font-size: 1.15em;
    margin: 25px 0;
    padding: 0 20px;
    border-left: 3px solid var(--primary-light);
    transition: border-color 0.3s;
}
p:hover{
    border-left-color: var(--primary);
}

a{
   display: inline-block;
    background: linear-gradient(145deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    padding: 14px 28px;
    border-radius: 40px 15px 40px 15px;  /* 不规则按钮 */
    margin: 10px 15px 10px 0;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 8px 20px var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}
a：：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;
}
a:hover{
    background-color: #ff5252;
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 30px var(--primary);
    background: linear-gradient(145deg,var(--primary-dark),var(--accent));
}
a[href*="bilibili"] {
    background: linear-gradient(145deg, #00a1d6, #0077a3);
    box-shadow: 0 8px 20px rgba(0, 161, 214, 0.3);
}
a[herf*="bilibili"]:hover{
     background: linear-gradient(145deg, #0077a3, #005c7a);
}
img{
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 30px 0;
    transition: transform 0.3s ease;
}
img:hover{
    transform: scale(1.02);
    box-shadow: 0 30px 60px rgba(229,62,126,0.3);
    outline-color: var(--primary);
}
.content-card{
   max-width: 100%;
    height: auto;
    border-radius: 30px 10px 30px 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    display: block;
    margin: 40px auto;
    border: 5px solid white;
    outline: 2px solid var(--primary-light);
    transition: all 0.5s;
}
img{
    border: 3px solid white;
    outline: 1px solid #ddd;
}
a{
    transition: all 0.3s cubic-bezier(0.68,-0.55,0.265,1.55);
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to{
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes sparkle{
    0%,100%{transform: scale(1);}
    50%{transform: scale(1.3) rotate(10deg);}
}
h2::before{
    content: "";
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg,var(--primary),var(--accent));
    border-radius: 2px;
}
.content-card{
    animation: fadeInUp 0.8s ease-out;
}
@media (max-width: 600px) {
    .content-card {
        padding: 25px;
        margin: 15px;
        border-radius: 30px 10px 30px 10px;
    }
    
    h1 {
        font-size: 2.2em;
        padding-left: 15px;
    }
    
    h2 {
        font-size: 1.8em;
        margin-left: 15px;
    }
    
    a {
        display: block;
        text-align: center;
        margin: 12px 0;
        padding: 16px 20px;
        font-size: 1.1em;
    }
    
    p {
        padding: 0 15px;
    }
}