/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 莫兰迪色系 */
    --primary-color: #A8B5AA;
    --primary-dark: #8A9A8C;
    --primary-light: #C4D4C6;
    --bg-color: #E8E4E1;
    --sidebar-bg: rgba(200, 195, 190, 0.6);
    --text-primary: #5A5A5A;
    --text-secondary: #7A7A7A;
    --text-light: #9A9A9A;
    --border-color: rgba(255, 255, 255, 0.5);
    --white: #ffffff;
    --tag-early: rgba(180, 175, 170, 0.5);
    --tag-recommend: rgba(160, 150, 140, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
    /* 玻璃效果 */
    --glass-bg: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #E8D5D0 0%, #D5D8DC 25%, #C9D6C3 50%, #D8D4CF 75%, #E5DDD5 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* 顶部栏 - 玻璃拟态 */
.top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    z-index: 300;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
}

/* 顶部装饰线 */
.top-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(168, 181, 170, 0.5), transparent);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 1;
}

.title-icon {
    font-size: 32px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.title-text {
    font-size: 34px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 4px;
    text-shadow: 0 1px 2px rgba(255,255,255,0.8);
}

/* 底部栏 - 玻璃拟态 */
.bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 55px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    z-index: 300;
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.5);
    padding: 0 10px;
}

.tab-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 16px;
    border: none;
    background: transparent;
    color: #5A5A5A;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-icon {
    font-size: 20px;
}

.tab-btn:hover {
    background: rgba(168, 181, 170, 0.4);
    color: #3A3A3A;
}

.tab-btn.active {
    background: rgba(168, 181, 170, 0.6);
    color: #3A3A3A;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

/* 页面容器 */
.page-container {
    display: none;
    padding-top: 70px;
    padding-bottom: 50px;
}

.page-container.active {
    display: block;
}

/* 左侧导航栏 - 玻璃拟态 */
.sidebar {
    width: 200px;
    height: calc(100vh - 120px);
    position: fixed;
    left: 0;
    top: 70px;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    overflow-y: auto;
    padding-top: 12px;
    border-right: 1px solid rgba(255, 255, 255, 0.5);
}

.nav-list {
    list-style: none;
    padding: 12px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    cursor: pointer;
    font-size: 30px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    border-radius: 0 12px 12px 0;
    margin: 4px 8px 4px 0;
    position: relative;
}

.nav-item:hover {
    background: rgba(168, 181, 170, 0.3);
    color: var(--text-primary);
}

.nav-free-tag {
    position: absolute;
    top: 5px;
    right: 6px;
    font-size: 11px;
    color: #22c55e;
    font-weight: 600;
    background: rgba(34, 197, 94, 0.1);
    padding: 1px 4px;
    border-radius: 3px;
}

.nav-item.active {
    color: var(--text-primary);
    font-weight: 600;
    background: rgba(168, 181, 170, 0.4);
    border-left-color: #8A9A8C;
}

.nav-icon {
    font-size: 20px;
    width: 28px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    margin-left: 200px;
    padding: 20px;
    min-height: 100vh;
}

.category-section {
    max-width: 1200px;
    margin: 0 auto;
}

/* 目录视图 */
.catalog-view {
    width: 100%;
    padding: 0;
}

.catalog-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.catalog-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.catalog-item:hover {
    background: rgba(168, 181, 170, 0.3);
    transform: translateY(-2px);
}

.catalog-num {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(168, 181, 170, 0.5);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    flex-shrink: 0;
}

.catalog-name {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.catalog-stars {
    font-size: 11px;
    white-space: nowrap;
}

.catalog-price {
    font-size: 13px;
    color: var(--accent);
    font-weight: 500;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .catalog-list {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .catalog-item {
        padding: 10px 12px;
        gap: 10px;
    }
    
    .catalog-num {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }
    
    .catalog-name {
        font-size: 13px;
    }
}

/* 商品列表 */
.product-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 商品卡片 - 玻璃拟态 */
.product-card {
    display: flex;
    flex-direction: row;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    cursor: pointer;
}

.product-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.5);
}

.product-image {
    width: 140px;
    aspect-ratio: 16/9;
    flex-shrink: 0;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 12px 14px;
    min-width: 0;
}

.product-header {
    margin-bottom: 6px;
}

.product-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.tag.early {
    background: rgba(180, 175, 170, 0.4);
    color: var(--text-secondary);
}

.tag.recommend {
    background: rgba(168, 181, 170, 0.6);
    color: var(--text-primary);
}

.product-desc {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding-right: 8px;
}

.product-difficulty {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    display: inline-block;
    padding: 2px 8px;
    background: rgba(168, 181, 170, 0.3);
    border-radius: 10px;
}

/* 响应式设计 - 移动端 */
@media (max-width: 768px) {
    .sidebar {
        width: 100px;
        padding-top: 8px;
    }

    .nav-item {
        padding: 12px 8px;
        font-size: 16px;
        flex-direction: column;
        gap: 4px;
        text-align: center;
        border-left-width: 2px;
    }

    .nav-icon {
        font-size: 18px;
        width: 100%;
    }

    .nav-item span:not(.nav-icon) {
        font-size: 12px;
        line-height: 1.2;
    }

    .main-content {
        margin-left: 100px;
        padding: 16px 12px;
    }

    .product-list {
        gap: 12px;
    }

    .product-card {
        border-radius: 10px;
    }

    .product-image {
        width: 100px;
        aspect-ratio: 16/9;
    }

    .product-info {
        padding: 10px 12px;
    }

    .product-name {
        font-size: 14px;
        margin-bottom: 5px;
    }

    .tag {
        font-size: 10px;
        padding: 2px 6px;
    }

    .product-desc {
        font-size: 11px;
        -webkit-line-clamp: 3;
    }
}

/* 响应式设计 - 小屏手机 */
@media (max-width: 375px) {
    .sidebar {
        width: 80px;
        padding-top: 6px;
    }

    .nav-item {
        padding: 10px 6px;
    }

    .nav-icon {
        font-size: 16px;
    }

    .nav-item span:not(.nav-icon) {
        font-size: 11px;
    }

    .main-content {
        margin-left: 80px;
        padding: 12px 10px;
    }

    .product-image {
        width: 90px;
        aspect-ratio: 16/9;
    }

    .product-info {
        padding: 8px 10px;
    }

    .product-name {
        font-size: 13px;
    }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: rgba(168, 181, 170, 0.5);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(168, 181, 170, 0.7);
}

/* 图片加载占位 */
.product-image img {
    background: linear-gradient(135deg, rgba(200, 195, 190, 0.3) 0%, rgba(168, 181, 170, 0.3) 100%);
}

/* 单曲教学页面 */
.song-main {
    padding: 20px;
    min-height: calc(100vh - 120px);
    margin-left: 0;
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-left: 12px;
    border-left: 3px solid rgba(168, 181, 170, 0.8);
    background: rgba(255, 255, 255, 0.3);
    padding: 12px 16px;
    border-radius: 0 12px 12px 0;
    backdrop-filter: blur(5px);
}

.song-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.song-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    cursor: pointer;
}

.song-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.5);
}

.song-card .product-image {
    width: 100%;
    aspect-ratio: 16/9;
    position: relative;
}

.song-card .product-info {
    padding: 14px;
}

.song-card .product-name {
    font-size: 16px;
}

.song-card .product-desc {
    -webkit-line-clamp: 2;
}

/* 收藏按钮 */
.favorite-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(5px);
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    filter: grayscale(100%);
    opacity: 0.6;
}

.favorite-btn:hover {
    transform: scale(1.15);
    opacity: 1;
    filter: grayscale(50%);
}

.favorite-btn.heart-active {
    background: rgba(255, 255, 255, 0.95);
    filter: grayscale(0%);
    opacity: 1;
}

/* 空收藏提示 */
.empty-favorite {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-favorite p {
    font-size: 16px;
    margin-bottom: 10px;
}

.empty-hint {
    font-size: 14px !important;
    color: var(--text-light);
}

/* 详情页弹窗 */
.detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 400;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.detail-modal.active {
    display: flex;
}

.detail-content {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
}

.detail-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(168, 181, 170, 0.3);
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.detail-close:hover {
    background: rgba(168, 181, 170, 0.5);
    transform: rotate(90deg);
}

.detail-header {
    padding: 20px 20px 15px;
    border-bottom: 1px solid rgba(168, 181, 170, 0.3);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.detail-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.detail-favorite-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(168, 181, 170, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(168, 181, 170, 0.2);
}

.detail-favorite-btn:hover {
    background: rgba(168, 181, 170, 0.4);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 6px 20px rgba(168, 181, 170, 0.3);
    transform: translateY(-1px);
}

.detail-favorite-btn.active {
    background: rgba(200, 180, 180, 0.35);
    border-color: rgba(220, 180, 180, 0.6);
    color: #b87070;
}

.detail-favorite-btn.active .heart-icon {
    transform: scale(1.1);
}

.heart-icon {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.detail-body {
    padding: 20px;
}

.detail-section {
    margin-bottom: 24px;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.section-subtitle {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.video-container {
    background: rgba(200, 195, 190, 0.3);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.video-placeholder iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.sheet-music {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    overflow: hidden;
}

.sheet-music img {
    width: 100%;
    height: auto;
    display: block;
}

/* 竖屏视频容器 */
.video-container-vertical {
    background: rgba(200, 195, 190, 0.3);
    border-radius: 12px;
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

.video-cover {
    width: 100%;
    position: relative;
    cursor: pointer;
    border-radius: 12px;
    overflow: hidden;
}

.video-cover img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-dark);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.video-cover:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--white);
}

/* 视频播放区域（竖向） */
.video-player {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
    aspect-ratio: 9/16;
    background: rgba(200, 195, 190, 0.3);
    border-radius: 12px;
    display: none;
}

.video-player.active {
    display: block;
}

.video-player-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .top-header {
        height: 55px;
        padding: 0 12px;
    }

    .title-text {
        font-size: 21px;
        letter-spacing: 2px;
    }

    .bottom-bar {
        height: 53px;
    }

    .tab-btn {
        padding: 5px 12px;
        font-size: 12px;
    }

    .tab-icon {
        font-size: 16px;
    }

    .page-container {
        padding-top: 55px;
        padding-bottom: 48px;
    }

    .sidebar {
        top: 55px;
        height: calc(100vh - 103px);
        width: 90px;
        background: rgba(255, 255, 255, 0.35);
        padding-bottom: 60px;
    }

    .nav-item {
        padding: 12px 8px;
        font-size: 13px;
        flex-direction: column;
        gap: 4px;
        text-align: center;
        border-left-width: 2px;
        margin: 2px 4px 2px 0;
    }

    .nav-icon {
        font-size: 18px;
        width: 100%;
    }

    .nav-item span:not(.nav-icon) {
        font-size: 12px;
        line-height: 1.2;
    }

    .main-content {
        margin-left: 90px;
        padding: 16px 12px;
    }

    .product-list {
        gap: 12px;
    }

    .product-card {
        border-radius: 14px;
    }

    .product-image {
        width: 100px;
        aspect-ratio: 16/9;
    }

    .product-info {
        padding: 10px 12px;
    }

    .product-name {
        font-size: 14px;
        margin-bottom: 5px;
    }

    .tag {
        font-size: 10px;
        padding: 2px 6px;
    }

    .product-desc {
        font-size: 11px;
        -webkit-line-clamp: 3;
    }

    .song-main {
        padding: 16px 12px;
    }

    .song-grid {
        gap: 12px;
    }

    .song-card .product-info {
        padding: 12px;
    }
}

@media (max-width: 375px) {
    .top-header {
        height: 50px;
    }

    .title-text {
        font-size: 18px;
        letter-spacing: 1px;
    }

    .bottom-bar {
        height: 50px;
    }

    .tab-btn {
        padding: 4px 8px;
        font-size: 11px;
    }

    .tab-icon {
        font-size: 14px;
    }

    .page-container {
        padding-top: 50px;
        padding-bottom: 45px;
    }

    .sidebar {
        top: 50px;
        height: calc(100vh - 95px);
        width: 75px;
        padding-bottom: 60px;
    }

    .nav-item {
        padding: 10px 6px;
    }

    .nav-icon {
        font-size: 16px;
    }

    .nav-item span:not(.nav-icon) {
        font-size: 11px;
    }

    .main-content {
        margin-left: 75px;
        padding: 12px 10px;
    }

    .product-image {
        width: 90px;
        aspect-ratio: 16/9;
    }

    .product-info {
        padding: 8px 10px;
    }

    .product-name {
        font-size: 13px;
    }
}

/* 详情页移动端响应式 */
@media (max-width: 768px) {
    .detail-modal {
        padding: 10px;
    }

    .detail-content {
        max-height: 95vh;
        border-radius: 16px;
    }

    .detail-header {
        padding: 15px 15px 12px;
    }

    .detail-title {
        font-size: 18px;
    }

    .detail-favorite-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .detail-body {
        padding: 15px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .detail-close {
        width: 32px;
        height: 32px;
        font-size: 16px;
        top: 10px;
        right: 10px;
    }
}

/* ==================== 详情页独立页面样式 ==================== */

/* 详情页顶部栏 */
.detail-top {
    flex-direction: row;
    justify-content: space-between;
    padding: 0 16px;
}

.detail-top .header-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(168, 181, 170, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(168, 181, 170, 0.2);
}

.back-btn:hover {
    background: rgba(168, 181, 170, 0.4);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 6px 20px rgba(168, 181, 170, 0.3);
    transform: translateY(-1px);
}

/* 详情页内容区 */
.detail-page-content {
    padding: 90px 20px 20px;
    min-height: 100vh;
}

.detail-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    max-width: 800px;
    margin: 0 auto;
}

.detail-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding: 16px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
}

/* 详情页移动端响应式 */
@media (max-width: 768px) {
    .detail-top {
        height: 55px;
        padding: 0 12px;
    }

    .back-btn {
        padding: 6px 10px;
        font-size: 13px;
    }

    .detail-favorite-btn {
        padding: 6px 10px;
        font-size: 13px;
    }

    .detail-top .title-text {
        font-size: 16px;
    }

    .detail-page-content {
        padding: 75px 12px 12px;
    }

    .detail-card {
        padding: 16px;
        border-radius: 16px;
    }

    .detail-desc {
        font-size: 14px;
        padding: 12px;
    }

    .video-container-vertical {
        max-width: 100%;
    }

    .video-player {
        max-width: 240px;
    }

    .play-button {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

/* ==================== �ܱߺ�����ʽ ==================== */
.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.shop-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    cursor: pointer;
}

.shop-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(168, 181, 170, 0.2);
}

.shop-card .product-image {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.shop-card .product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.shop-card:hover .product-image img {
    transform: scale(1.05);
}

.shop-card .product-info {
    padding: 16px;
}

.shop-card .product-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px;
}

.shop-card .product-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    font-size: 18px;
    font-weight: 600;
    color: #b87070;
    margin: 0;
}

@media (max-width: 768px) {
    .shop-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .shop-card .product-info {
        padding: 12px;
    }

    .shop-card .product-name {
        font-size: 14px;
    }

    .shop-card .product-desc {
        font-size: 12px;
    }

    .product-price {
        font-size: 16px;
    }
}

/* ==================== ����ҳ˫�в��� ==================== */
.detail-two-column {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.detail-left-column {
    flex: 1;
    min-width: 0;
}

.detail-right-column {
    flex: 1;
    min-width: 0;
}

.detail-right-column .detail-section {
    height: 100%;
}

.detail-right-column .sheet-music {
    height: calc(100% - 40px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-right-column .sheet-music img {
    max-height: 500px;
    width: auto;
    object-fit: contain;
}

@media (max-width: 900px) {
    .detail-two-column {
        flex-direction: column;
    }

    .detail-left-column,
    .detail-right-column {
        width: 100%;
    }

    .detail-right-column .sheet-music {
        height: auto;
    }

    .detail-right-column .sheet-music img {
        max-height: 400px;
    }
}

/* ==================== ����ҳ˫�в��� ==================== */
.detail-two-column {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.detail-left-column {
    flex: 1;
    min-width: 0;
}

.detail-right-column {
    flex: 1;
    min-width: 0;
    display: flex;
    justify-content: center;
}

.detail-right-column .detail-section {
    width: 100%;
    max-width: 400px;
}

.detail-right-column .sheet-music {
    position: sticky;
    top: 90px;
}

/* ��Ӧʽ��С��900pxʱ���в��� */
@media (max-width: 900px) {
    .detail-two-column {
        flex-direction: column;
    }

    .detail-right-column {
        justify-content: flex-start;
    }

    .detail-right-column .detail-section {
        max-width: 100%;
    }

    .detail-right-column .sheet-music {
        position: static;
    }
}

/* ==================== ����ҳ��Ʒ��Ƭ��� ==================== */
.detail-product-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    max-width: 800px;
    margin: 0 auto;
}

.detail-product-image {
    width: 100%;
    aspect-ratio: 2/1;
    overflow: hidden;
}

.detail-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-product-info {
    padding: 24px;
}

.detail-product-name {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.detail-product-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0 0 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(168, 181, 170, 0.3);
}

.detail-video-section,
.detail-sheet-section {
    margin-bottom: 24px;
}

.detail-sheet-section {
    margin-bottom: 0;
}

/* ��Ӧʽ */
@media (max-width: 768px) {
    .detail-product-card {
        border-radius: 16px;
        margin: 0 12px;
    }

    .detail-product-info {
        padding: 16px;
    }

    .detail-product-name {
        font-size: 20px;
    }

    .detail-product-desc {
        font-size: 14px;
        margin-bottom: 20px;
        padding-bottom: 16px;
    }
}

/* ==================== ���֪ʶҳ����ʽ ==================== */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

@media (max-width: 768px) {
    .knowledge-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* ==================== �������ղذ�ť ==================== */
.main-top-header {
    flex-direction: row;
    justify-content: space-between;
    padding: 0 16px;
}

.main-top-header .header-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.header-favorite-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(168, 181, 170, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(168, 181, 170, 0.2);
}

.header-favorite-btn:hover {
    background: rgba(168, 181, 170, 0.4);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 6px 20px rgba(168, 181, 170, 0.3);
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .main-top-header {
        height: 55px;
        padding: 0 12px;
    }

    .main-top-header .title-text {
        font-size: 16px;
    }

    .header-favorite-btn {
        padding: 6px 10px;
        font-size: 13px;
    }
}

/* ==================== 周边好物页面 ==================== */
.shop-page {
    display: none;
    flex-direction: row;
    padding-top: 70px;
    padding-bottom: 50px;
    min-height: 100vh;
}

.shop-page.active {
    display: flex;
}

.shop-sidebar {
    width: 180px;
    min-width: 180px;
    height: calc(100vh - 120px);
    position: sticky;
    top: 70px;
    background: var(--sidebar-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 15px 0;
}

.shop-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.shop-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    color: var(--text-primary);
    font-size: 14px;
}

.shop-nav-item:hover {
    background: rgba(168, 181, 170, 0.3);
}

.shop-nav-item.active {
    background: rgba(168, 181, 170, 0.4);
    border-left-color: var(--primary-dark);
    font-weight: 600;
}

/* 周边好物产品列表 */
.shop-page .product-list {
    flex: 1;
    min-width: 0;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shop-page .product-price {
    font-size: 15px;
}

/* 周边好物详情页样式 */
.shop-detail-content .detail-card {
    max-width: 800px;
    margin: 0 auto;
}

.shop-image-section {
    padding: 0;
}

.shop-detail-image {
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    background: var(--glass-bg);
    box-shadow: var(--shadow);
}

.shop-detail-image img {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: cover;
    display: block;
}

.shop-price-section {
    background: rgba(168, 181, 170, 0.2);
    border-radius: 12px;
    padding: 15px 20px;
    margin-top: 10px;
}

.shop-price-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.shop-price-label {
    font-size: 16px;
    color: var(--text-secondary);
}

.shop-price-value {
    font-size: 24px;
    font-weight: 700;
    color: #B8860B;
}

@media (max-width: 768px) {
    .shop-page {
        flex-direction: row;
        padding-top: 55px;
        padding-bottom: 48px;
    }

    .shop-sidebar {
        width: 80px;
        min-width: 80px;
        height: calc(100vh - 103px);
        position: sticky;
        top: 55px;
        overflow-x: hidden;
        overflow-y: auto;
        padding: 8px 0;
        border-right: 1px solid var(--border-color);
        border-bottom: none;
    }

    .shop-nav-list {
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        padding: 0;
        gap: 0;
    }

    .shop-nav-item {
        flex-shrink: 0;
        padding: 8px 4px;
        border-left: 2px solid transparent;
        border-bottom: none;
        border-radius: 0;
        font-size: 11px;
        flex-direction: column;
        gap: 2px;
        text-align: center;
    }

    .shop-nav-item.active {
        border-left-color: var(--primary-dark);
        border-bottom-color: transparent;
        background: rgba(168, 181, 170, 0.4);
    }

    .shop-page .product-list {
        flex: 1;
        min-width: 0;
        padding: 8px;
        gap: 10px;
    }

    .shop-page .product-price {
        font-size: 13px;
    }

    .shop-detail-image img {
        max-height: 250px;
    }

    .shop-price-value {
        font-size: 20px;
    }
}

/* 产品卡片价格样式 */
.product-price {
    font-size: 18px;
    font-weight: 700;
    color: #B8860B;
    margin-top: 8px;
}

/* 级别选择页面 */
.level-select-title {
    font-size: 23px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 24px;
    padding: 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    letter-spacing: 1px;
    line-height: 1.6;
}

.level-select-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.level-select-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 20px;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    cursor: pointer;
}

.level-select-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.5);
}

.level-select-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 80px;
}

.level-select-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.level-select-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.level-select-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    border-radius: 50%;
}

.level-icon-1 { background: linear-gradient(135deg, #7EC8E3, #5B9BD5); }
.level-icon-2 { background: linear-gradient(135deg, #89CFF0, #6BB3D9); }
.level-icon-3 { background: linear-gradient(135deg, #98D8AA, #7BC47F); }
.level-icon-4 { background: linear-gradient(135deg, #B8E0D2, #8FCACA); }
.level-icon-5 { background: linear-gradient(135deg, #D4A5A5, #C48B8B); }
.level-icon-6 { background: linear-gradient(135deg, #E6B89C, #D99E6A); }
.level-icon-7 { background: linear-gradient(135deg, #F2D388, #E5B85C); }
.level-icon-8 { background: linear-gradient(135deg, #E8A87C, #D4896A); }
.level-icon-9 { background: linear-gradient(135deg, #C38D9E, #A97181); }
.level-icon-10 { background: linear-gradient(135deg, #8E7CC3, #6B5B95); }

.level-select-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    text-align: center;
}

.level-select-standard {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.level-select-btn {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(168, 181, 170, 0.5);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.level-select-card:hover .level-select-btn {
    background: rgba(168, 181, 170, 0.7);
}

@media (max-width: 768px) {
    .level-select-title {
        font-size: 18px;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    
    .level-select-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .level-select-card {
        padding: 16px;
        gap: 16px;
    }
    
    .level-select-left {
        min-width: 60px;
    }
    
    .level-select-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .level-select-name {
        font-size: 14px;
    }
    
    .level-select-standard {
        font-size: 12px;
    }
}

/* 密钥激活弹窗样式 - 玻璃拟态风格 */
.key-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(120, 110, 100, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.key-modal.active {
    display: flex;
}

.key-modal-content {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 28px 24px;
    width: 90%;
    max-width: 380px;
    box-shadow: 
        0 8px 32px rgba(120, 110, 100, 0.15),
        0 2px 8px rgba(120, 110, 100, 0.1),
        inset 0 1px 1px rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.key-modal-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
}

.key-modal-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: #5a524d;
    letter-spacing: 1px;
    text-align: center;
}

.key-modal-note {
    text-align: center;
    font-size: 18px;
    font-weight: 800;
    color: #22c55e;
    padding: 10px 15px;
    margin-bottom: 15px;
}

.key-modal-remark {
    text-align: center;
    font-size: 14px;
    color: #22c55e;
    padding: 10px 15px;
    margin-top: 10px;
}

.key-modal-close {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(180, 170, 160, 0.2);
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: #8a827d;
    padding: 8px 12px;
    line-height: 1;
    border-radius: 12px;
    transition: all 0.3s;
}

.key-modal-close:hover {
    background: rgba(180, 170, 160, 0.35);
    color: #5a524d;
}

.key-modal-body {
    margin-bottom: 24px;
}

.key-modal-desc {
    font-size: 14px;
    color: #8a827d;
    margin-bottom: 18px;
    text-align: center;
    line-height: 1.6;
}

.key-input-group {
    margin-bottom: 14px;
}

.key-input-group input {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid rgba(180, 170, 160, 0.3);
    border-radius: 16px;
    font-size: 20px;
    letter-spacing: 6px;
    text-align: center;
    text-transform: uppercase;
    outline: none;
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.5);
    color: #5a524d;
    font-weight: 500;
}

.key-input-group input::placeholder {
    color: #b5ada6;
    letter-spacing: 2px;
    font-size: 14px;
}

.key-input-group input:focus {
    border-color: rgba(160, 145, 130, 0.5);
    background: rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 20px rgba(160, 145, 130, 0.15);
}

.key-error-msg {
    color: #c4a09a;
    font-size: 13px;
    min-height: 18px;
    text-align: center;
}

.key-modal-footer {
    display: flex;
    gap: 14px;
    justify-content: center;
}

.key-btn {
    padding: 14px 40px;
    border: none;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
}

.key-btn-confirm {
    background: linear-gradient(135deg, #a89490 0%, #9a8680 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(160, 140, 130, 0.3);
}

.key-btn-confirm:hover {
    background: linear-gradient(135deg, #9a8680 0%, #8c7872 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(160, 140, 130, 0.4);
}

.key-modal-wechat {
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid rgba(180, 170, 160, 0.2);
    text-align: center;
    font-size: 14px;
    color: #6a625d;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.key-modal-wechat code {
    background: rgba(180, 170, 160, 0.35);
    padding: 5px 14px;
    border-radius: 8px;
    font-family: 'SF Mono', 'Consolas', monospace;
    color: #4a4540;
    font-size: 15px;
    letter-spacing: 1px;
    font-weight: 500;
}

.key-copy-wechat {
    background: rgba(160, 145, 130, 0.4);
    color: #4a4540;
    border: 1px solid rgba(160, 145, 130, 0.3);
    padding: 6px 18px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.key-copy-wechat:hover {
    background: rgba(160, 145, 130, 0.55);
    transform: translateY(-1px);
}

/* ==================== 视频列表玻璃拟态样式 ==================== */

/* 玻璃卡片容器 */
.glass-card {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 
        0 4px 16px rgba(120, 110, 100, 0.08),
        0 1px 4px rgba(120, 110, 100, 0.05);
    position: relative;
    overflow: hidden;
}

/* 玻璃卡片光泽效果 */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0%, transparent 100%);
    pointer-events: none;
    border-radius: 16px 16px 0 0;
}

.glass-card:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.45);
    box-shadow: 
        0 8px 24px rgba(120, 110, 100, 0.12),
        0 2px 8px rgba(120, 110, 100, 0.08);
    border-color: rgba(255, 255, 255, 0.7);
}

.glass-card:active {
    transform: translateY(-1px);
}

/* 播放按钮 */
.glass-play-btn {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(168, 181, 170, 0.6) 0%, rgba(138, 154, 140, 0.7) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    flex-shrink: 0;
    box-shadow: 
        0 4px 12px rgba(138, 154, 140, 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease;
    position: relative;
}

.glass-play-btn span {
    color: rgba(255, 255, 255, 0.95);
    font-size: 18px;
    margin-left: 3px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.glass-card:hover .glass-play-btn {
    transform: scale(1.08);
    box-shadow: 
        0 6px 16px rgba(138, 154, 140, 0.35),
        inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

/* 内容区域 */
.glass-content {
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
}

/* 标题 */
.glass-title {
    font-weight: 600;
    color: #5a5550;
    font-size: 16px;
    margin-bottom: 4px;
    line-height: 1.4;
    letter-spacing: 0.5px;
}

/* 副标题 */
.glass-subtitle {
    color: #9a9590;
    font-size: 12px;
    letter-spacing: 0.3px;
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .glass-card {
        padding: 14px 16px;
        margin-bottom: 10px;
        border-radius: 14px;
    }
    
    .glass-play-btn {
        width: 42px;
        height: 42px;
        margin-right: 14px;
    }
    
    .glass-play-btn span {
        font-size: 16px;
        margin-left: 2px;
    }
    
    .glass-title {
        font-size: 15px;
    }
    
    .glass-subtitle {
        font-size: 11px;
    }
}

@media (max-width: 375px) {
    .glass-card {
        padding: 12px 14px;
        margin-bottom: 8px;
        border-radius: 12px;
    }
    
    .glass-play-btn {
        width: 38px;
        height: 38px;
        margin-right: 12px;
    }
    
    .glass-play-btn span {
        font-size: 14px;
    }
    
    .glass-title {
        font-size: 14px;
    }
}