/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
    background: url('bg.jpg') no-repeat center center fixed !important;
    background-size: cover !important;
}

body {
    font-family: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    overflow: hidden;
    min-height: 100vh;
    background: transparent !important;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

/* 启动页容器 */
.splash-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.6s ease-out;
    background: rgba(0, 0, 0, 0.2);
}

.splash-container.fade-out {
    opacity: 0;
}

/* 内容包装器 */
.content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-wrapper.collapse {
    transform: scale(0.5) translateY(20px);
    opacity: 0;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Logo包装器 */
.logo-wrapper {
    opacity: 1;
    transform: scale(1) translateY(0);
    animation: logoEnter 0.5s ease-out forwards;
}

@keyframes logoEnter {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Logo SVG */
.splash-logo {
    width: 180px;
    height: auto;
    filter: drop-shadow(0 8px 32px rgba(255, 255, 255, 0.3));
}

/* Google四色加载点动画 */
.google-dots {
    display: flex;
    gap: 8px;
    margin-top: 40px;
}

.google-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: googleBounce 1.4s ease-in-out infinite;
}

.google-dot:nth-child(1) {
    background: #60a5fa;
    animation-delay: 0s;
}

.google-dot:nth-child(2) {
    background: #a78bfa;
    animation-delay: 0.2s;
}

.google-dot:nth-child(3) {
    background: #f472b6;
    animation-delay: 0.4s;
}

.google-dot:nth-child(4) {
    background: #818cf8;
    animation-delay: 0.6s;
}

@keyframes googleBounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.6;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Logo路径样式 - 蓝紫色风格 */
.letter-d {
    fill: url(#gradientD);
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 1;
}

.letter-b {
    fill: url(#gradientB);
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 1;
}

.pencil-icon,
.pencil-line {
    stroke: rgba(96, 165, 250, 0.9);
    fill: none;
}

.chip-rect,
.chip-line {
    stroke: rgba(139, 92, 246, 0.8);
    fill: none;
}

/* 进度条包装器 - 初始隐藏 */
.progress-wrapper {
    position: absolute;
    width: 280px;
    opacity: 0;
    transform: scaleX(0.3);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-wrapper.show {
    opacity: 1;
    transform: scaleX(1);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 进度条外框 - 蓝紫色风格 */
.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 3px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.15),
        inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* 进度条填充 - 蓝紫色渐变 */
.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, 
        #60a5fa 0%, 
        #a78bfa 50%,
        #f472b6 100%
    );
    border-radius: 3px;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 15px rgba(96, 165, 250, 0.5);
}

/* 完成状态 */
.progress-wrapper.complete .progress-fill {
    background: linear-gradient(90deg, 
        #34d399 0%, 
        #60a5fa 100%
    );
    box-shadow: 0 0 20px rgba(52, 211, 153, 0.6);
}

/* 星星闪烁动画 */
@keyframes twinkle {
    0%, 100% { opacity: 0.4; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.2); }
}

@keyframes twinkle2 {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(0.7); }
}

@keyframes shootingStar {
    0% { opacity: 1; transform: translateX(0) translateY(0); }
    100% { opacity: 0; transform: translateX(20px) translateY(10px); }
}

.star-1 { animation: twinkle 2s ease-in-out infinite; }
.star-2 { animation: twinkle 2.5s ease-in-out infinite 0.3s; }
.star-3 { animation: twinkle2 3s ease-in-out infinite 0.5s; }
.star-4 { animation: twinkle 2.2s ease-in-out infinite 0.8s; }
.star-5 { animation: twinkle2 2.8s ease-in-out infinite 1s; }
.star-6 { animation: twinkle 2.3s ease-in-out infinite 0.2s; }
.star-7 { animation: twinkle2 2.7s ease-in-out infinite 0.6s; }
.star-8 { animation: twinkle 3.2s ease-in-out infinite 0.4s; }

.shooting-star {
    animation: shootingStar 3s ease-in-out infinite;
    transform-origin: left center;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .splash-logo {
        width: 140px;
    }

    .brand-text {
        font-size: 1.3rem;
        letter-spacing: 2px;
    }

    .progress-wrapper {
        width: 240px;
    }
    
    .google-dots {
        gap: 6px;
    }
    
    .google-dot {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    .splash-logo {
        width: 120px;
    }

    .brand-text {
        font-size: 1.1rem;
        letter-spacing: 1px;
    }

    .progress-wrapper {
        width: 200px;
    }
    
    .progress-bar {
        height: 3px;
    }
    
    .progress-text {
        font-size: 0.8rem;
    }
    
    .google-dot {
        width: 8px;
        height: 8px;
    }
}