/* ==========================================================================
   春节知识页面样式
   ========================================================================== */

/* 知识容器调整，为单层导航栏留出空间 */
.knowledge-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px 40px; /* 为单层导航栏留出适当空间 */
}

/* 知识页面背景 - 喜庆的春节氛围 */
.knowledge-bg {
    background: linear-gradient(
        135deg,
        #ff6b6b 0%,
        #ee5a24 20%,
        #ff9ff3 40%,
        #f368e0 60%,
        #ff6348 80%,
        #ff4757 100%
    ) !important;
    position: relative;
    overflow: hidden;
}

/* 添加春节装饰元素 */
.knowledge-bg::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(
            circle at 20% 80%,
            rgba(255, 215, 0, 0.1) 0%,
            transparent 50%
        ),
        radial-gradient(
            circle at 80% 20%,
            rgba(255, 69, 0, 0.1) 0%,
            transparent 50%
        ),
        radial-gradient(
            circle at 40% 40%,
            rgba(255, 20, 147, 0.1) 0%,
            transparent 50%
        );
    pointer-events: none;
    z-index: -1;
}

.knowledge-bg::after {
    content: '🧧 🏮 🎊 ✨ 🌸 🎋 🧧 🏮 🎊 ✨ 🌸 🎋 🧧 🏮 🎊 ✨ 🌸 🎋';
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 100px;
    font-size: 2rem;
    line-height: 100px;
    white-space: nowrap;
    opacity: 0.1;
    animation: festiveFloat 30s linear infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes festiveFloat {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(0);
    }
}

/* 导航栏 */
.knowledge-nav {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 100;
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-home {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all var(--animation-fast) ease;
    font-size: 0.95rem;
}

.back-home:hover {
    background: rgba(212, 175, 55, 0.1);
    transform: translateX(-3px);
}

.back-arrow {
    font-size: 1.2rem;
    font-weight: bold;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

/* 知识页面容器 */
.knowledge-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 页面标题 */
.knowledge-header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease-out;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    font-family: var(--font-secondary);
}

/* 知识模块 */
.knowledge-sections {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.knowledge-section {
    animation: fadeInUp 1s ease-out;
}

.section-card {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--animation-fast) ease;
}

.section-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.card-header {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--accent-color)
    );
    color: white;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-icon {
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
}

.card-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.card-content {
    padding: 40px 30px;
}

/* 内容文本 */
.content-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 20px;
}

/* 时间轴 */
.timeline {
    margin-top: 30px;
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        var(--primary-color),
        var(--accent-color)
    );
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    left: -25px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary-color);
}

.timeline-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* 习俗网格 */
.customs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.custom-item {
    text-align: center;
    padding: 25px 20px;
    background: rgba(248, 249, 250, 0.8);
    border-radius: 15px;
    transition: all var(--animation-fast) ease;
    border: 1px solid rgba(212, 175, 55, 0.1);
}

.custom-item:hover {
    background: rgba(212, 175, 55, 0.1);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.custom-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.custom-item h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.custom-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* 马年特色卡片 */
.horse-special {
    border: 2px solid var(--secondary-color);
    position: relative;
}

.horse-special::before {
    content: '🐎';
    position: absolute;
    top: -15px;
    right: 30px;
    font-size: 3rem;
    background: white;
    padding: 0 15px;
}

.horse-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.horse-traits ul {
    list-style: none;
    padding: 0;
}

.horse-traits li {
    margin-bottom: 15px;
    padding-left: 20px;
    position: relative;
    font-size: 1rem;
    line-height: 1.6;
}

.horse-traits li::before {
    content: '🐎';
    position: absolute;
    left: 0;
    font-size: 1rem;
}

.prediction-cards {
    display: grid;
    gap: 20px;
}

.prediction-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(248, 249, 250, 0.8);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.prediction-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.prediction-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 5px 0;
}

.prediction-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.5;
}

/* 美食网格 */
.food-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.food-item {
    text-align: center;
    padding: 25px 20px;
    background: rgba(248, 249, 250, 0.8);
    border-radius: 15px;
    transition: all var(--animation-fast) ease;
    border: 1px solid rgba(212, 175, 55, 0.1);
}

.food-item:hover {
    background: rgba(212, 175, 55, 0.1);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.food-image {
    font-size: 4rem;
    margin-bottom: 15px;
    display: block;
}

.food-item h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.food-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* 诗词卡片 */
.poetry-card .card-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.poems {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.poem-item {
    text-align: center;
    padding: 30px 25px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 15px;
    border-left: 4px solid var(--secondary-color);
}

.poem-content {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: var(--font-primary);
    line-height: 1.8;
    margin-bottom: 15px;
    font-style: italic;
}

.poem-author {
    font-size: 1rem;
    color: var(--text-secondary);
    font-family: var(--font-secondary);
    margin: 0;
}

/* 互动区域 */
.interactive-section {
    margin-top: 60px;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.interactive-container {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-medium);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.interactive-container h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.quiz-container {
    max-width: 600px;
    margin: 0 auto;
}

.quiz-question {
    background: rgba(248, 249, 250, 0.8);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 25px;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.6;
}

.quiz-options {
    display: grid;
    gap: 15px;
}

.quiz-start-btn,
.quiz-option {
    background: rgba(212, 175, 55, 0.1);
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
    padding: 15px 25px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--animation-fast) ease;
    font-family: var(--font-primary);
}

.quiz-start-btn:hover,
.quiz-option:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.quiz-option.correct {
    background: #28a745;
    border-color: #28a745;
    color: white;
}

.quiz-option.incorrect {
    background: #dc3545;
    border-color: #dc3545;
    color: white;
}

.quiz-result {
    margin-top: 20px;
    font-size: 1.1rem;
    font-weight: 500;
}

/* 知识页面页脚 */
.knowledge-footer {
    margin-top: 80px;
    background: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    padding: 30px 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all var(--animation-fast) ease;
}

.footer-link:hover {
    background: rgba(212, 175, 55, 0.1);
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .knowledge-container {
        padding: 30px 15px;
    }

    .card-content {
        padding: 30px 20px;
    }

    .horse-info {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .customs-grid,
    .food-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .prediction-cards {
        grid-template-columns: 1fr;
    }

    .prediction-card {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 2rem;
    }

    .card-header {
        padding: 20px 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .header-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }

    .interactive-container {
        padding: 30px 20px;
    }
}

/* 时间线详细样式 */
.timeline-detail {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 500;
    padding: 4px 8px;
    background: rgba(212, 175, 55, 0.1);
    border-radius: 12px;
    border-left: 3px solid var(--accent-color);
}

/* 习俗时间轴 */
.customs-timeline {
    margin-top: 20px;
}

.customs-timeline > h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    position: relative;
}

.customs-timeline > h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--accent-color)
    );
    border-radius: 2px;
}

.custom-phase {
    margin-bottom: 40px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 15px;
    border-left: 5px solid var(--primary-color);
}

.phase-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.phase-title::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), transparent);
    margin-left: 15px;
}

.custom-item h5 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 600;
}

.custom-time,
.custom-region {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 10px;
    font-weight: 500;
}

.custom-time {
    background: rgba(76, 175, 80, 0.1);
    color: #388e3c;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.custom-region {
    background: rgba(63, 81, 181, 0.1);
    color: #3949ab;
    border: 1px solid rgba(63, 81, 181, 0.3);
}

/* 页脚样式 */
.knowledge-footer {
    margin-top: 60px;
    padding: 30px 20px;
    background: rgba(0, 0, 0, 0.05);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.knowledge-footer .footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.knowledge-footer p {
    margin: 0 0 15px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

.footer-link {
    color: var(--accent-primary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    font-size: 14px;
}

.footer-link:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.footer-separator {
    color: var(--text-secondary);
    font-size: 12px;
}