/* ==================== CSS变量 ==================== */
:root {
    --primary-bg: #1a1410;
    --secondary-bg: #2a1f1a;
    --accent-gold: #d4a574;
    --accent-bronze: #8b6f47;
    --text-primary: #f5e6d3;
    --text-secondary: #c9b59a;
    --card-bg: rgba(36, 25, 20, 0.5);
    --card-hover-bg: rgba(36, 25, 20, 0.8);
    --shadow-deep: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.2);
    --border-gold: 1px solid rgba(212, 165, 116, 0.3);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Serif SC', serif;
    background: linear-gradient(135deg, #1a1410 0%, #0f0a08 100%);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    line-height: 1.8;
}

/* ==================== 装饰性背景 ==================== */
.bg-decoration {
    content: '';
    position: fixed;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 120%;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.05) 0%, transparent 70%);
    pointer-events: none;
    animation: float 20s ease-in-out infinite;
    z-index: 0;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-20px, 20px) rotate(5deg); }
}

.noise-texture {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("../images/seria.jpg");
    pointer-events: none;
    opacity: 0.5;
    z-index: 0;
}

/* ==================== 容器 ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px 120px;
    position: relative;
    z-index: 1;
}

/* ==================== 头部 ==================== */
.header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 0.8s ease-out;
}

.site-title {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 4rem;
    color: var(--accent-gold);
    margin-bottom: 12px;
    text-shadow: 0 4px 20px rgba(212, 165, 116, 0.4);
    letter-spacing: 8px;
}

.site-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    letter-spacing: 4px;
    opacity: 0.9;
}

/* ==================== 导航标签 ==================== */
.tab-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
    position: relative;
    animation: fadeIn 1s ease-out 0.2s both;
}

.tab-btn {
    background: var(--card-bg);
    border: var(--border-gold);
    padding: 16px 40px;
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-family: 'Noto Serif SC', serif;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 165, 116, 0.1), transparent);
    transition: left 0.5s;
}

.tab-btn:hover::before {
    left: 100%;
}

.tab-btn:hover {
    border-color: var(--accent-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.tab-btn.active {
    background: var(--accent-bronze);
    border-color: var(--accent-gold);
    color: var(--text-primary);
    box-shadow: var(--shadow-light);
}

.tab-icon {
    font-size: 1.4rem;
}

/* ==================== 内容区域 ==================== */
.content {
    position: relative;
    min-height: 400px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.tab-content.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.section-title {
    font-size: 2rem;
    color: var(--accent-gold);
    border-left: 4px solid var(--accent-gold);
    padding-left: 20px;
}

.filter-group {
    display: flex;
    gap: 12px;
}

.filter-select {
    background: var(--card-bg);
    border: var(--border-gold);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 8px;
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.filter-select:hover {
    border-color: var(--accent-gold);
    background: var(--card-hover-bg);
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.1);
}

/* ==================== 书籍网格 ==================== */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    animation: fadeIn 0.6s ease-out 0.3s both;
}

.book-card {
    background: var(--card-bg);
    border: var(--border-gold);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.book-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s;
}

.book-card:hover::before {
    opacity: 1;
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-deep);
    border-color: var(--accent-gold);
    background: var(--card-hover-bg);
}

.book-cover {
    width: 100%;
    aspect-ratio: 10/4;
    background: linear-gradient(135deg, var(--accent-bronze) 0%, var(--secondary-bg) 100%);
    background-image: url('../images/seria_ts.png');
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover-placeholder {
    font-size: 4rem;
}

.book-info {
    position: relative;
    z-index: 1;
}

.book-title {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.book-author {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 12px;
}

.book-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(212, 165, 116, 0.2);
}

.book-category {
    background: rgba(212, 165, 116, 0.15);
    color: var(--accent-gold);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.book-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==================== 加载状态 ==================== */
.loading {
    text-align: center;
    padding: 80px 20px;
    animation: fadeIn 0.5s ease-out;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(212, 165, 116, 0.2);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ==================== 空状态 ==================== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.2rem;
}

/* ==================== 即将推出 ==================== */
.coming-soon {
    text-align: center;
    padding: 100px 20px;
    animation: fadeIn 0.6s ease-out;
}

.coming-soon-icon {
    font-size: 6rem;
    margin-bottom: 30px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.coming-soon h3 {
    font-size: 2rem;
    color: var(--accent-gold);
    margin-bottom: 16px;
}

.coming-soon p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ==================== 播放器容器 ==================== */
.player-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--secondary-bg);
    border-top: 2px solid var(--accent-gold);
    padding: 20px;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(20px);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.player-header {
    max-width: 1400px;
    margin: 0 auto 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.now-playing {
    flex: 1;
}

.playing-label {
    color: var(--accent-gold);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 4px;
}

.current-title {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin: 0;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.close-btn:hover {
    background: rgba(212, 165, 116, 0.2);
    color: var(--accent-gold);
    transform: rotate(90deg);
}

#aplayer {
    max-width: 1400px;
    margin: 0 auto;
}

/* ==================== APlayer 自定义样式 ==================== */
.aplayer {
    background: transparent !important;
    box-shadow: none !important;
}

.aplayer .aplayer-body {
    background: rgba(36, 25, 20, 0.6) !important;
    backdrop-filter: blur(10px);
    border-radius: 12px;
}

.aplayer .aplayer-info {
    border-bottom-color: rgba(212, 165, 116, 0.2) !important;
}

.aplayer .aplayer-music {
    color: var(--text-primary) !important;
}

.aplayer .aplayer-author {
    color: var(--text-secondary) !important;
}

.aplayer .aplayer-controller .aplayer-bar-wrap .aplayer-bar .aplayer-played {
    background: var(--accent-gold) !important;
}

.aplayer .aplayer-controller .aplayer-bar-wrap .aplayer-bar .aplayer-played .aplayer-thumb {
    background: var(--accent-gold) !important;
}

.aplayer .aplayer-lrc {
    color: var(--text-secondary) !important;
}

.aplayer .aplayer-lrc p.aplayer-lrc-current {
    color: var(--accent-gold) !important;
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .site-title {
        font-size: 2.5rem;
        letter-spacing: 4px;
    }

    .site-subtitle {
        font-size: 0.9rem;
        letter-spacing: 2px;
    }

    .tab-nav {
        gap: 12px;
    }

    .tab-btn {
        padding: 12px 24px;
        font-size: 1rem;
    }

    .tab-icon {
        font-size: 1.2rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
    }

    .book-title {
        font-size: 1.1rem;
    }

    .player-container {
        padding: 16px;
    }

    .current-title {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 16px 100px;
    }

    .book-grid {
        grid-template-columns: 1fr;
    }

    .tab-btn {
        flex: 1;
        justify-content: center;
    }
}