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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* 背景元素 */
.grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 1;
}

.bg-bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    animation: float 8s infinite ease-in-out;
    z-index: 2;
}

.bubble-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    right: 15%;
    animation-delay: 2s;
}

.bubble-3 {
    width: 100px;
    height: 100px;
    top: 60%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* 容器 */
.container {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2);
    padding: 48px 32px;
    max-width: 600px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 10;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* 封面页 */
.logo {
    font-size: 80px;
    margin-bottom: 20px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.title {
    font-size: 32px;
    color: white;
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
}

.tip {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

/* 按钮 */
.btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 14px 32px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0 8px;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

.btn-secondary {
    background: rgba(0, 0, 0, 0.2);
}

.btn-group {
    margin: 24px 0;
}

/* 答题页 */
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00feba, #5b54fa);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 12.5%;
}

.question-count {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin-bottom: 24px;
}

.question {
    font-size: 24px;
    color: white;
    margin-bottom: 32px;
    line-height: 1.5;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.options {
    display: grid;
    gap: 16px;
}

.option {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 16px 20px;
    color: white;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
}

.option:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(4px);
}

/* 结果页 */
.result-badge {
    font-size: 60px;
    margin-bottom: 16px;
}

.result-title {
    font-size: 28px;
    color: white;
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.result-summary {
    font-size: 18px;
    color: #00feba;
    font-weight: 600;
    margin-bottom: 24px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.result-detail {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 24px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 24px;
    text-align: left;
}

.share-line {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    margin-bottom: 16px;
}

.back-home {
    margin-top: 16px;
}

.back-home a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.back-home a:hover {
    color: white;
}

@media (max-width: 480px) {
    .container {
        padding: 32px 20px;
    }

    .title {
        font-size: 24px;
    }

    .question {
        font-size: 20px;
    }

    .btn {
        width: 100%;
        margin: 8px 0;
    }
}