body {
    margin: 0;
    padding: 0;
    background-color: #090B14;
    background-image: url('https://chuquan.oss-cn-hangzhou.aliyuncs.com/sites/img/bg@3x.jpg');
    background-position: top center;
    background-repeat: no-repeat;
    background-size: 1800px;
    min-height: 100vh;
}

/* 固定页头样式 */
.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 90px;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    padding: 0 20px;
    position: relative;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -8px);
}

.logo {
    width: 150px;
    height: 60px;
    background-image: url('https://chuquan.oss-cn-hangzhou.aliyuncs.com/sites/img/01-logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.nav-menu {
    flex: 1;
    text-align: center;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    margin: 0 20px;
    font-size: 16px;
    transition: opacity 0.3s;
}

.nav-menu a:hover {
    opacity: 0.7;
    text-decoration: none;
    color: white;
}

/* 主内容区域 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 110px 20px 50px;
    min-height: 100vh;
}

/* 锚点div */
.anchor-div {
    height: 1px;
    scroll-margin-top: 90px;
}

/* 图片堆叠区域 */
.image-stack {
    margin: 30px 0;
}

.image-stack img {
    max-width: 1200px;
    height: auto;
    margin-bottom: 20px;
}

/* 电视机边框样式 */
.tv-frame {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto 20px;
    padding: 20px;
    background: #212529;
    border-radius: 35px;
    box-shadow: 
        0 15px 35px rgba(0, 0, 0, 0.5),
        inset 0 3px 8px rgba(255, 255, 255, 0.1),
        inset 0 -3px 8px rgba(0, 0, 0, 0.4);
    position: relative;
    border: 2px solid #6b5537;
}

.tv-frame::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
    border: 1px solid #4a3825;
    border-radius: 28px;
    pointer-events: none;
    background: rgba(0, 0, 0, 0.3);
}

.tv-frame::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 8px;
    background: #3a2a1a;
    border-radius: 4px;
    box-shadow: 
        inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* 宣传片视频样式 */
.promo-video {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
    position: relative;
    z-index: 1;
}


/* 章节标题样式 */
.section-header {
    margin: 30px 0;
    text-align: center;
}

/* 右侧浮动二维码 */
.floating-qr {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.qr-item {
    position: relative;
    width: 40px;
    height: 40px;
    background-color: rgba(37, 35, 35, 0.9);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.qr-item:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.qr-popup {
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    width: 120px;
    height: 120px;
    background-color: #6b5537;
    border-radius: 10px;
    padding: 5px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.qr-item:hover .qr-popup {
    opacity: 1;
    visibility: visible;
    right: 70px;
}

.qr-popup::before {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 0 8px 10px;
    border-color: transparent transparent transparent white;
}

.qr-popup img {
    width: 100%;
    height: 100%;
    border-radius: 5px;
}



/* 响应式设计 */
@media (max-width: 768px) {
    body {
        background-size: contain;
        background-position: center top;
        min-height: 100vh;
    }
    
    .fixed-header {
        height: 60px;
    }
    
    .mobile-menu-toggle {
        display: flex;
        position: absolute;
        left: 20px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .header-content {
        justify-content: center;
        position: relative;
    }
    
    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: rgba(0, 0, 0, 0.9);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        margin: 10px 0;
        font-size: 16px;
        display: block;
        padding: 10px 0;
    }
    
    .logo {
        width: 120px;
        height: 40px;
        font-size: 14px;
        position: relative;
        z-index: 1;
    }
    
    .main-content {
        padding: 80px 20px 50px;
    }
    
    .anchor-div {
        scroll-margin-top: 60px;
    }
    
    .floating-qr {
        right: 10px;
        gap: 10px;
    }

    .image-stack img {
        width: 100%;
    }
    
    .section-header img {
        width: auto;
        max-width: 100%;
        height: 35px;
    }
    
    .qr-item {
        width: 35px;
        height: 35px;
        font-size: 18px;
    }
    
    .qr-popup {
        width: 100px;
        height: 100px;
        right: 50px;
    }
    
    .qr-item:hover .qr-popup {
        right: 55px;
    }
    
    .tv-frame {
        width: 100%;
        padding: 20px;
        border-radius: 12px;
    }
    
    .tv-frame::before {
        top: 8px;
        left: 8px;
        right: 8px;
        bottom: 8px;
    }
    
    .tv-frame::after {
        width: 40px;
        height: 6px;
        bottom: 5px;
    }
    
    .promo-video {
        border-radius: 6px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* 二维码弹框样式 */
.qr-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.qr-modal-content {
    background-color: #1a1a1a;
    padding: 0;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    max-width: 400px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.qr-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.qr-modal-header h3 {
    margin: 0;
    color: white;
    font-size: 18px;
    font-weight: 600;
}

.qr-modal-close {
    color: rgba(255, 255, 255, 0.6);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s ease;
}

.qr-modal-close:hover {
    color: white;
}

.qr-modal-body {
    padding: 25px;
    text-align: center;
}

.qr-modal-body p {
    margin: 0 0 20px 0;
    color: white;
    font-size: 16px;
}

.qr-modal-body img {
    max-width: 200px;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.qr-modal-tip {
    font-size: 14px !important;
    color: rgba(255, 255, 255, 0.7) !important;
    margin: 0 !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 移动端弹框适配 */
@media (max-width: 768px) {
    .qr-modal-content {
        width: 85%;
        max-width: 320px;
    }
    
    .qr-modal-header {
        padding: 15px 20px;
    }
    
    .qr-modal-header h3 {
        font-size: 16px;
    }
    
    .qr-modal-body {
        padding: 20px;
    }
    
    .qr-modal-body img {
        max-width: 160px;
    }
    
    .qr-modal-tip {
        font-size: 13px !important;
    }
}