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

html,
body{
    width:100%;
    height:100%;
    overflow:hidden;
    font-family:'Noto Sans KR',sans-serif;
}

/* 背景 */
body{
    background:
    url('../pic/bg.avif')
    center center / cover no-repeat;

    position:relative;
}

/* 浅色遮罩 */
.overlay{
    position:absolute;
    inset:0;
    background:
    rgba(255,255,255,.70);
    backdrop-filter:blur(3px);
    z-index:1;
}

/* 漂浮光点 */
.particle{
    position:absolute;
    border-radius:50%;
    background:
    rgba(255,255,255,.55);
    filter:blur(4px);
    animation:
    float 10s infinite ease-in-out;
}

.p1{
    width:120px;
    height:120px;
    top:10%;
    left:10%;
}

.p2{
    width:80px;
    height:80px;
    right:10%;
    top:20%;
    animation-delay:2s;
}

.p3{
    width:150px;
    height:150px;
    bottom:15%;
    left:15%;
    animation-delay:4s;
}

.p4{
    width:100px;
    height:100px;
    bottom:10%;
    right:15%;
    animation-delay:1.5s;
}

@keyframes float{
    0%{
        transform:
        translateY(0)
        scale(1);
    }

    50%{
        transform:
        translateY(-25px)
        scale(1.08);
    }

    100%{
        transform:
        translateY(0)
        scale(1);
    }
}

/* 主内容 */
.container{
    position:relative;
    z-index:10;

    height:100vh;
    width:100%;

    display:flex;
    justify-content:center;
    align-items:center;

    padding:20px;
}

/* 内容卡片 */
.card{

    width:100%;
    max-width:520px;

    background:
    rgba(255,255,255,.38);

    border:
    1px solid rgba(255,255,255,.5);

    backdrop-filter:blur(18px);

    border-radius:28px;

    padding:
    42px
    28px;

    text-align:center;

    box-shadow:
    0 10px 35px rgba(0,0,0,.10);

    animation:
    fadeUp 1s ease;
}

@keyframes fadeUp{
    from{
        opacity:0;
        transform:
        translateY(40px);
    }

    to{
        opacity:1;
        transform:
        translateY(0);
    }
}

/* 小标签 */
.badge{
    display:inline-block;
    padding:
    8px 18px;

    border-radius:999px;

    background:
    rgba(255,255,255,.65);

    font-size:13px;
    color:#666;

    margin-bottom:18px;

    animation:
    softPulse 4s infinite;
}

@keyframes softPulse{
    0%{
        transform:scale(1);
    }

    50%{
        transform:scale(1.05);
    }

    100%{
        transform:scale(1);
    }
}

/* 标题 */
.title{
    font-size:36px;
    font-weight:700;
    color:#2d2d2d;
    line-height:1.35;

    animation:
    fadeIn 1.2s ease;
}

.highlight{
    color:#6e9ca7;
}

/* 描述 */
.desc{
    margin-top:18px;
    font-size:17px;
    color:#555;
    line-height:1.9;

    animation:
    fadeIn 1.5s ease;
}

@keyframes fadeIn{
    from{
        opacity:0;
    }

    to{
        opacity:1;
    }
}

/* 按钮 */
.cta-btn{

    margin-top:34px;

    border:none;
    outline:none;

    padding:
    18px
    34px;

    border-radius:999px;

    font-size:18px;
    font-weight:700;

    color:#fff;

    cursor:pointer;

    background:
    linear-gradient(
        135deg,
        #84a9ac,
        #6e9ca7
    );

    box-shadow:
    0 10px 25px
    rgba(110,156,167,.35);

    transition:
    .35s ease;

    animation:
    breathing 3s infinite;
}

.cta-btn:hover{

    transform:
    translateY(-3px)
    scale(1.03);

    box-shadow:
    0 18px 35px
    rgba(110,156,167,.4);
}

@keyframes breathing{

    0%{
        transform:scale(1);
    }

    50%{
        transform:scale(1.04);
    }

    100%{
        transform:scale(1);
    }
}

/* 模态框 */
.modal{

    position:fixed;
    inset:0;

    background:
    rgba(0,0,0,.45);

    display:none;

    justify-content:center;
    align-items:center;

    z-index:999;
    padding:20px;
}

.modal.show{
    display:flex;
}

.modal-box{

    width:100%;
    max-width:460px;

    background:#fff;

    border-radius:24px;

    padding:
    32px
    26px;

    box-shadow:
    0 20px 60px
    rgba(0,0,0,.2);

    animation:
    modalPop .35s ease;
}

@keyframes modalPop{

    from{
        opacity:0;
        transform:
        scale(.88);
    }

    to{
        opacity:1;
        transform:
        scale(1);
    }
}

.modal-title{
    font-size:24px;
    font-weight:700;
    color:#333;
    margin-bottom:18px;
}

.modal-content{
    font-size:15px;
    line-height:1.9;
    color:#555;
}

.notice{
    margin-top:18px;
    padding:16px;
    border-radius:16px;
    background:#f7f7f7;
    color:#777;
    font-size:13px;
    line-height:1.8;
}

.close-btn{

    margin-top:24px;
    width:100%;

    border:none;

    padding:15px;

    border-radius:14px;

    background:
    #6e9ca7;

    color:#fff;

    font-size:16px;
    cursor:pointer;

    transition:.3s;
}

.close-btn:hover{
    transform:translateY(-2px);
}

/* 手机端 */
@media(max-width:768px){

    .card{
        padding:
        36px
        22px;

        border-radius:24px;
    }

    .title{
        font-size:28px;
    }

    .desc{
        font-size:15px;
    }

    .cta-btn{
        width:100%;
        font-size:17px;
    }

    .modal-box{
        border-radius:22px;
    }
}