body {
    font-size: 18px;
    color: #6c767d;
    background-color: #ebf1f5;
    height: 100vh;
    min-height: 800px;
}

#bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

#sound-btn {
    display: none;
    position: fixed;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: #fff;
    font-size: 18px;
    line-height: 1;
    z-index: 2000;
    cursor: pointer;
    transition: background-color .2s ease;
}

#sound-btn:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

@media (min-width: 768px) {
    #sound-btn {
        display: block;
    }
}

/* ===== 进站加载遮罩 ===== */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2147483000;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(20, 26, 38, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: opacity .6s ease;
}

#loader.is-hide {
    opacity: 0;
    pointer-events: none;
}

/* 贯穿屏幕左右的横线 */
.loader-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, .45) 50%, transparent 100%);
    pointer-events: none;
}

.line-top {
    top: 28%;
}

.line-bottom {
    bottom: 28%;
}

.loader-box {
    position: relative;
    width: 90%;
    max-width: 420px;
    padding: 36px 32px 30px;
    text-align: center;
    color: #fff;
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.loader-ring {
    position: relative;
    width: 96px;
    height: 96px;
    margin: 0 auto 14px;
}

.loader-ring svg {
    width: 100%;
    height: 100%;
    display: block;
}

.ring-track {
    fill: none;
    stroke: rgba(255, 255, 255, 0.18);
    stroke-width: 6;
}

.ring-bar {
    fill: none;
    stroke: url(#ring-gradient);
    stroke-width: 6;
    stroke-linecap: round;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    transition: stroke-dashoffset .2s ease, stroke .3s ease;
}

.ring-bar.is-done {
    stroke: #a8e6a3;
}

.loader-ring-text {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    transform: translateY(-50%);
    text-align: center;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
}

.loader-ring-text.is-done {
    color: #a8e6a3;
}

.loader-box h2 {
    color: #fff;
    font-size: 22px;
    margin-bottom: 12px;
}

.loader-tip {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 22px;
    line-height: 1.7;
}

.loader-tip i {
    margin-right: 4px;
}

.loader-progress {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background-color: rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.loader-progress-bar {
    width: 0;
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, #6bb8ff, #3d8bfd);
    transition: width .2s ease;
}

#loader-enter {
    display: none;
    margin: 18px auto 0;
    padding: 10px 44px;
    border: none;
    border-radius: 24px;
    background: linear-gradient(90deg, #6bb8ff, #3d8bfd);
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(61, 139, 253, 0.45);
    animation: loader-btn-in .4s ease;
}

#loader-enter.is-show {
    display: inline-block;
}

#loader-enter:hover {
    filter: brightness(1.08);
}

@keyframes loader-btn-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/*定义滚动条高宽及背景 高宽分别对应横竖滚动条的尺寸*/
::-webkit-scrollbar {
    width: 5px;
    background-color: #F5F5F5;
}

/*定义滚动条轨道 内阴影+圆角*/
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    background-color: #F5F5F5;
}

/*定义滑块 内阴影+圆角*/
::-webkit-scrollbar-thumb {
    border-radius: 10px;
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
    background-color: #555;
}

h1 {
    font-size: 36px;
    margin-bottom: .5em;
}

h4 {
    font-size: 16px;
}

h1,
h4 {
    color: black;
}

/*卡片：半透明玻璃效果（手机端与电脑端参数一致）*/
.card {
    padding: 80px 80px 0;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 0;
    background-color: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.container {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

.btn {
    border-radius: 0;
    margin: 5px 0;
    width: 100%;
    padding: 12px 40px;
}

.btn-primary:hover,
.btn-secondary:hover,
.btn-success:hover {
    box-shadow: 5px -2px 15px 0px rgb(203, 221, 232);
}

.social {
    padding-left: 0;
}

.social li {
    list-style: none;
    float: left;
    margin-right: 15px;
}

footer p {
    font-size: 12px;
}

/*手机端直接使用链接跳转，桌面端用按钮弹层*/
#kaygb-blog-a,
#kaygb-mail-a {
    display: none;
}

@media (max-width: 1199px) {
    body {
        min-height: 600px;
    }
    h1 {
        font-size: 24px;
    }
    h4,
    p {
        font-size: 14px;
    }
    .card {
        padding: 50px 50px 0;
    }
}

@media (max-width: 767px) {
    /*手机端不显示背景视频，底层改用随机背景图*/
    #bg-video {
        display: none;
    }
    body::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: url(https://t.alcy.cc/pc);
        background-position: center center;
        background-repeat: no-repeat;
        background-size: cover;
        z-index: -1;
    }
    .container {
        position: relative;
        top: 0;
        transform: translateY(0);
        min-height: 100vh;
        display: flex;
        padding-top: 24px;
        padding-bottom: 24px;
        box-sizing: border-box;
    }
    /*手机端不提示背景声音*/
    .loader-tip {
        display: none;
    }
    /*卡片水平+垂直居中、限宽、圆角浮于背景图之上*/
    .my-card {
        max-width: 440px;
        width: 100%;
        margin: auto;
    }
    .card {
        padding: 24px 20px;
        border-radius: 12px;
    }
    #kaygb-blog-a,
    #kaygb-mail-a {
        display: block;
    }
    #kaygb-blog,
    #kaygb-mail {
        display: none;
    }
}

#aplayer {
    z-index: 20000000;
}