html,
body,
#app {
    height: 100%;
    margin: 0px;
    padding: 0px;
}

.chromeframe {
    margin: 0.2em 0;
    background: #ccc;
    color: #000;
    padding: 0.2em 0;
}

#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    background: linear-gradient(135deg, #1a1f2e 0%, #0d1117 100%);
    overflow: hidden;
}

#loader {
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    width: 48px;
    height: 48px;
    margin: -24px 0 0 -24px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.06);
    border-top-color: #9ca3b0;
    animation: spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    z-index: 1001;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 金属粉末粒子 */
#particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(200, 210, 230, 0.7), rgba(150, 160, 180, 0.1));
    box-shadow: 0 0 3px rgba(180, 190, 210, 0.2);
    animation: float linear infinite;
    opacity: 0;
}

@keyframes float {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    8% {
        opacity: 0.7;
    }
    85% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-110vh) translateX(20px);
        opacity: 0;
    }
}

.loaded #loader {
    opacity: 0;
    transition: all 0.3s ease-out;
}

.loaded #particles {
    opacity: 0;
    transition: opacity 0.3s ease-out;
}

.loaded #loader-wrapper {
    visibility: hidden;
    transform: translateY(-100%);
    transition: all 0.3s 1s ease-out;
}

.no-js #loader-wrapper {
    display: none;
}

.no-js h1 {
    color: #222222;
}

#loader-wrapper .load_title {
    font-family: 'Open Sans', sans-serif;
    color: rgba(255, 255, 255, 0.35);
    font-size: 13px;
    width: 100%;
    text-align: center;
    z-index: 1001;
    position: absolute;
    top: calc(50% + 40px);
    letter-spacing: 3px;
    font-weight: 300;
}