/**
 * AI 分析加载动画 - 炫彩光效版
 * 来源: Uiverse.io by dexter-st
 */

/* 基础容器样式 - 使用主页深蓝色背景以突显光效 */
.ai-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    min-height: 300px;
    background: linear-gradient(135deg, #3d4bd0 0%, #2e3bb8 100%); /* 主页深蓝色渐变 */
    border-radius: 12px;
    box-shadow: 
        inset 0 0 20px rgba(0,0,0,0.3),
        0 4px 20px rgba(78, 91, 240, 0.2); /* 内阴影 + 蓝色外发光 */
}

.ai-loading-tip {
    margin-top: 40px;
    font-size: 14px;
    color: #94a3b8; /* 浅灰色提示文字 */
    text-align: center;
    font-weight: 500;
    letter-spacing: 1px;
}

/* 炫彩加载器主容器 */
.loader-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 120px;
    width: auto;
    margin: 2rem;
    font-family: "PingFang SC", "Microsoft YaHei", "Poppins", sans-serif;
    font-size: 1.6em;
    font-weight: 600;
    user-select: none;
    scale: 2;
}

/* 移除背景文字层 */
/* .loader-text-background { ... } */

/* 动画文字层 - 白色带光效 */
.loader-text-animated {
    position: relative;
    z-index: 2;
    color: #fff;
    /* 增加文字发光效果 */
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

/* 炫彩光效遮罩层 */
.loader {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    z-index: 1;
    background-color: transparent;
    /* 竖条纹遮罩 */
    mask: repeating-linear-gradient(
        90deg,
        transparent 0,
        transparent 6px,
        black 7px,
        black 8px
    );
}

/* 彩虹光效核心动画 */
.loader::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* 加深颜色，增强对比度 */
    background-image: 
        radial-gradient(circle at 50% 50%, #ffd700 0%, transparent 50%), /* 金黄 */
        radial-gradient(circle at 45% 45%, #ff4062 0%, transparent 45%), /* 深红 */
        radial-gradient(circle at 55% 55%, #00ffff 0%, transparent 45%), /* 青色 */
        radial-gradient(circle at 45% 55%, #00ff00 0%, transparent 45%), /* 亮绿 */
        radial-gradient(circle at 55% 45%, #4E5BF0 0%, transparent 45%); /* 深蓝 */
    /* 环形遮罩，制造光晕效果 */
    mask: radial-gradient(
        circle at 50% 50%,
        transparent 0%,
        transparent 10%,
        black 25%
    );
    animation:
        transform-animation 2s infinite alternate,
        opacity-animation 4s infinite;
    animation-timing-function: cubic-bezier(0.6, 0.8, 0.5, 1);
}

/* 光效左右移动动画 */
@keyframes transform-animation {
    0% {
        transform: translate(-55%);
    }
    100% {
        transform: translate(55%);
    }
}

/* 光效淡入淡出动画 */
@keyframes opacity-animation {
    0%,
    100% {
        opacity: 0;
    }
    15% {
        opacity: 1;
    }
    65% {
        opacity: 0;
    }
}

/* 逐字闪烁文字效果 */
.loader-letter {
    display: inline-block;
    opacity: 0;
    animation: loader-letter-anim 4s infinite linear;
    z-index: 2;
}

/* 为每个字符设置不同的延迟，形成波浪效果 */
.loader-letter:nth-child(1) { animation-delay: 0.1s; }
.loader-letter:nth-child(2) { animation-delay: 0.205s; }
.loader-letter:nth-child(3) { animation-delay: 0.31s; }
.loader-letter:nth-child(4) { animation-delay: 0.415s; }
.loader-letter:nth-child(5) { animation-delay: 0.521s; }
.loader-letter:nth-child(6) { animation-delay: 0.626s; }
.loader-letter:nth-child(7) { animation-delay: 0.731s; }
.loader-letter:nth-child(8) { animation-delay: 0.837s; }
.loader-letter:nth-child(9) { animation-delay: 0.942s; }
.loader-letter:nth-child(10) { animation-delay: 1.047s; }
.loader-letter:nth-child(11) { animation-delay: 1.152s; }
.loader-letter:nth-child(12) { animation-delay: 1.257s; }
.loader-letter:nth-child(13) { animation-delay: 1.362s; }
.loader-letter:nth-child(14) { animation-delay: 1.467s; }
.loader-letter:nth-child(15) { animation-delay: 1.572s; }
.loader-letter:nth-child(16) { animation-delay: 1.677s; }
.loader-letter:nth-child(17) { animation-delay: 1.782s; }
.loader-letter:nth-child(18) { animation-delay: 1.887s; }
.loader-letter:nth-child(19) { animation-delay: 1.992s; }
.loader-letter:nth-child(20) { animation-delay: 2.097s; }

/* 字符闪烁动画 */
@keyframes loader-letter-anim {
    0% {
        opacity: 0;
    }
    5% {
        opacity: 1;
        text-shadow: 0 0 4px #fff;
        transform: scale(1.1) translateY(-2px);
    }
    20% {
        opacity: 0.2;
    }
    100% {
        opacity: 0;
    }
}

/* 响应式适配 - 移动端缩小 */
@media (max-width: 768px) {
    .loader-wrapper {
        scale: 1.2;
        font-size: 1.2em;
    }
    
    .ai-loading {
        padding: 40px 15px;
        min-height: 250px;
    }
}