/* 上海品良科技有限公司网站样式 - 现代 Glassmorphism 科技风格 */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

:root {
    /* 主色调 - 现代深蓝科技风格 */
    --primary-color: #0F172A;
    --primary-dark: #020617;
    --primary-light: #334155;
    --secondary-color: #0369A1;
    --accent-color: #0EA5E9;
    --text-color: #020617;
    --text-light: #475569;
    --text-muted: #94A3B8;
    --bg-color: #F8FAFC;
    --bg-light: #FFFFFF;
    --bg-dark: #F1F5F9;
    --border-color: rgba(148, 163, 184, 0.2);
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    
    /* Glassmorphism 效果 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
    --glass-blur: blur(20px);
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
    
    /* 圆角系统 */
    --border-radius-sm: 6px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* 过渡动画 */
    --transition-fast: all 0.15s ease;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* Logo 主题色 - 马头红 */
    --logo-red: #E53E3E;
    --logo-blue: #0369A1;
    --logo-light-blue: #38BDF8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #F8FAFC 0%, #E2E8F0 50%, #F1F5F9 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 - Glassmorphism 效果 */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 12px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    position: absolute;
    left: 20px;
}

.logo i {
    font-size: 32px;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo span {
    font-size: 12px;
    color: var(--text-light);
    font-weight: 500;
    margin-left: 5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    font-size: 15px;
    padding: 10px 16px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.nav-menu li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--logo-red), var(--logo-blue));
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-menu li a:hover {
    color: var(--primary-color);
    background: rgba(3, 105, 161, 0.08);
}

.nav-menu li a:hover::before {
    width: 60%;
}

.nav-menu li a.active {
    color: var(--secondary-color);
    background: rgba(3, 105, 161, 0.12);
    font-weight: 600;
}

/* 桌面端隐藏移动端菜单中的登录注册按钮和用户信息 */
.nav-menu li.mobile-auth,
.nav-menu li.mobile-user {
    display: none;
}

/* 桌面端隐藏桌面端按钮的类 */
.desktop-only {
    display: flex;
}

.auth-buttons {
    display: flex;
    gap: 12px;
}

/* 移动端（最大宽度768px）隐藏桌面端按钮 */
@media screen and (max-width: 768px) {
    .navbar .auth-buttons {
        display: none !important;
    }

    .navbar .desktop-only {
        display: none !important;
    }

    .navbar .nav-menu > li.mobile-auth,
    .navbar .nav-menu > li.mobile-user {
        display: block;
    }
}

.auth-buttons button {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Poppins', sans-serif;
}

/* 登录状态用户信息 - 红色文字，无底色，带下拉菜单 */
.auth-buttons .user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    color: var(--logo-red);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.auth-buttons .user-info:hover {
    background: rgba(229, 62, 62, 0.1);
}

.auth-buttons .user-info i {
    font-size: 16px;
}

.auth-buttons .user-info .fa-chevron-down {
    font-size: 12px;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

.auth-buttons .user-info.active .fa-chevron-down {
    transform: rotate(180deg);
}

/* 用户下拉菜单 */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.user-dropdown-item:last-child {
    border-bottom: none;
}

.user-dropdown-item:hover {
    background: rgba(3, 105, 161, 0.08);
    color: var(--primary-color);
}

.user-dropdown-item i {
    font-size: 14px;
    color: var(--text-light);
}

.user-dropdown-item:hover i {
    color: var(--primary-color);
}

.user-dropdown-item.logout {
    color: var(--logo-red);
}

.user-dropdown-item.logout:hover {
    background: rgba(229, 62, 62, 0.08);
}

.user-dropdown-item.logout i {
    color: var(--logo-red);
}

/* 移动端登录状态 */
.nav-menu li.mobile-user a {
    color: var(--logo-red);
    font-weight: 500;
}

.nav-menu li.mobile-logout a {
    color: var(--logo-red);
}

.btn-login {
    background: transparent;
    color: var(--secondary-color);
    border: 1.5px solid var(--border-color);
}

.btn-login:hover {
    background: rgba(3, 105, 161, 0.08);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-register-plain {
    background: transparent;
    color: var(--secondary-color);
    border: none;
}

.btn-register-plain:hover {
    background: rgba(3, 105, 161, 0.05);
    transform: translateY(-2px);
}



.mobile-menu-btn {
    display: none;
    font-size: 24px;
    color: var(--primary-color);
    cursor: pointer;
}



.tech-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.stat {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--logo-red), var(--logo-blue));
    opacity: 0;
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.stat:hover::before {
    opacity: 1;
}

.stat i {
    font-size: 32px;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.stat h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat p {
    font-size: 14px;
    opacity: 0.8;
    margin: 0;
}

/* 主要内容区域 */
main {
    padding: 80px 0;
    margin-top: 0;
}

main.container {
    padding-top: 70px;
}

/* 移动端主体内容 */
@media (max-width: 768px) {
    body main.container {
        padding-top: 15px !important;
    }
}

.section {
    margin-bottom: 80px;
    padding: 40px 0;
}

.section-title {
    font-family: 'Poppins', sans-serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.5px;
}

.section-title i {
    font-size: 32px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
    font-weight: 400;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
}

/* 程序下载卡片 */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.app-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--logo-red), var(--logo-blue));
    transform: scaleX(0);
    transition: var(--transition);
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(3, 105, 161, 0.3);
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px -5px rgba(230, 57, 70, 0.4);
    transition: var(--transition);
}

.app-card:hover .app-icon {
    transform: scale(1.1) rotate(5deg);
}

.app-icon i {
    font-size: 28px;
    color: white;
}

.app-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.app-card p {
    color: var(--text-light);
    margin-bottom: 20px;
    flex-grow: 1;
}

.app-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.app-tags span {
    background: var(--bg-dark);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.btn-download {
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    font-family: 'Poppins', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn-download::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px -5px rgba(230, 57, 70, 0.4);
}

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

.btn-download:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 音乐播放器 */
.music-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
}

.music-player {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    color: white;
    position: relative;
    overflow: hidden;
}

.music-player::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.player-controls {
    display: flex;
    gap: 15px;
}

.ctrl-btn, .play-btn, .pause-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ctrl-btn:hover, .play-btn:hover, .pause-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.track-info h4 {
    font-size: 24px;
    margin-bottom: 5px;
}

.track-info p {
    opacity: 0.8;
    margin-bottom: 20px;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    margin-bottom: 10px;
    overflow: hidden;
}

.progress {
    height: 100%;
    width: 40%;
    background: white;
    border-radius: 3px;
}

.time-display {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    opacity: 0.8;
}

.music-list h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.music-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.music-item:hover {
    background: var(--bg-dark);
    border-color: var(--border-color);
}

.music-item.active {
    background: var(--bg-dark);
    border-color: var(--primary-light);
}

.music-item i {
    color: var(--primary-color);
    font-size: 20px;
}

.music-details {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.music-title {
    font-weight: 500;
    color: var(--text-color);
}

.music-artist {
    font-size: 14px;
    color: var(--text-light);
}

.duration {
    font-size: 14px;
    color: var(--text-light);
}

/* 影视卡片 */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.video-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    border: 1px solid var(--glass-border);
    position: relative;
}

.video-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--logo-red), var(--logo-blue));
    transform: scaleX(0);
    transition: var(--transition);
    z-index: 1;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.video-card:hover::before {
    transform: scaleX(1);
}

.video-thumbnail {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-thumbnail i {
    font-size: 60px;
    color: white;
    opacity: 0.8;
}

.video-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.video-card h3 {
    padding: 20px 20px 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-dark);
}

.video-card p {
    padding: 0 20px;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 15px;
}

.video-meta {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-light);
}

.video-meta i {
    margin-right: 5px;
}

.tech-circle {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    animation: rotate 20s linear infinite;
    box-shadow: 
        0 20px 40px -10px rgba(230, 57, 70, 0.4),
        0 0 0 10px rgba(69, 123, 157, 0.1),
        0 0 0 20px rgba(69, 123, 157, 0.05);
    position: relative;
}

.tech-circle::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    opacity: 0.3;
    filter: blur(20px);
    z-index: -1;
}

.tech-circle i {
    font-size: 80px;
    color: white;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 页脚 */
.footer {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    color: var(--text-color);
    padding: 20px 0 15px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--glass-border);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 90%, rgba(3, 105, 161, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 10%, rgba(14, 165, 233, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-logo i {
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--secondary-color);
}

.footer-logo h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    flex-direction: column;
}

.footer-links h4 {
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 5px;
    font-size: 13px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 10px;
}

.footer-social h4 {
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-dark);
    border-radius: 50%;
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

.social-icons a:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-muted);
}

.footer-bottom p {
    margin-bottom: 5px;
}

.footer-bottom a {
    text-decoration: none;
    color: inherit;
}

.footer-bottom a:hover {
    text-decoration: none;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    margin: 72px auto 45px;
    padding: 36px;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 450px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--glass-border);
    position: relative;
    animation: modalSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 不活动警告动画 */
@keyframes slideIn {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 不活动警告样式 */
.inactivity-warning {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    z-index: 10000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    animation: slideIn 0.3s ease;
}

.inactivity-warning-content {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.inactivity-warning-content i {
    font-size: 16px;
}

.inactivity-dismiss {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    padding: 4px;
    margin-left: 10px;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    transition: background-color 0.2s ease;
}

.inactivity-dismiss:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal .close {
    position: absolute;
    right: 25px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.modal .close:hover {
    color: var(--danger-color);
}

.modal h2 {
    color: var(--primary-color);
    margin-bottom: 27px;
    display: flex;
    align-items: center;
    gap: 9px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 13px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    transition: var(--transition);
    background-color: rgba(255, 255, 255, 0.8);
    font-family: 'Open Sans', sans-serif;
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(3, 105, 161, 0.1);
    background-color: white;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 14px;
}

.form-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
    font-family: 'Poppins', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px -5px rgba(230, 57, 70, 0.4);
}

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

.form-footer {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.form-footer a:hover {
    text-decoration: underline;
}

/* 音乐播放器弹窗 */
.music-player-modal {
    max-width: 450px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

.music-player-popup {
    padding: 30px;
    text-align: center;
}

.album-art-large {
    width: 180px;
    height: 180px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: rgba(255,255,255,0.9);
    position: relative;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.album-art-large .playing-animation {
    position: absolute;
    bottom: 20px;
    display: none;
}

.album-art-large .playing-animation.active {
    display: flex;
}

.player-info-popup h2 {
    font-size: 22px;
    margin-bottom: 8px;
    color: white;
}

.player-info-popup p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 25px;
}

.progress-container-popup {
    margin-bottom: 25px;
}

.progress-bar-popup {
    height: 6px;
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
    cursor: pointer;
    margin-bottom: 10px;
    overflow: hidden;
}

.progress-fill-popup {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #38BDF8);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

.time-info-popup {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

.player-controls-popup {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    margin-bottom: 25px;
}

.player-controls-popup .ctrl-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.15);
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-controls-popup .ctrl-btn:hover {
    background: rgba(255,255,255,0.25);
    transform: scale(1.1);
}

.player-controls-popup .play-btn-large {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: none;
    background: white;
    color: var(--secondary-color);
    font-size: 28px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

.player-controls-popup .play-btn-large:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.volume-control-popup {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: rgba(255,255,255,0.7);
}

.volume-control-popup i {
    font-size: 14px;
}

.volume-control-popup .volume-slider {
    width: 120px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    outline: none;
}

.volume-control-popup .volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
}

/* 视频播放器弹窗 */
.video-player-modal {
    max-width: 800px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

.video-player-popup {
    padding: 20px;
    text-align: center;
}

.video-player-popup video {
    width: 100%;
    border-radius: 12px;
    background: #000;
    max-height: 450px;
}

.video-info-popup {
    margin-top: 20px;
}

.video-info-popup h2 {
    font-size: 22px;
    margin-bottom: 8px;
    color: white;
}

.video-info-popup p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 20px;
}

.video-controls-popup {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
}

.video-controls-popup .ctrl-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.15);
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-controls-popup .ctrl-btn:hover {
    background: rgba(255,255,255,0.25);
    transform: scale(1.1);
}

.video-controls-popup .play-btn-large {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: none;
    background: white;
    color: var(--secondary-color);
    font-size: 28px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

.video-controls-popup .play-btn-large:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

/* 用户留言板块 */
.guestbook-section {
    padding: 25px 0;
    margin-top: 20px;
}

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

.guestbook-section .section-header h3 {
    font-size: 18px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.guestbook-section .online-count {
    font-size: 13px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 5px;
}

.guestbook-messages {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.guestbook-message {
    display: flex;
    gap: 12px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.guestbook-message:hover {
    background: var(--bg-dark);
    transform: translateX(5px);
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.message-author {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 14px;
}

.message-time {
    font-size: 12px;
    color: var(--text-muted);
}

.message-text {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
}

.guestbook-input-area {
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.input-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.guestbook-input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
}

.guestbook-input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.guestbook-textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
    resize: none;
    font-family: inherit;
    transition: var(--transition);
}

.guestbook-textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.btn-send-message {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.btn-send-message:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(3, 105, 161, 0.3);
}

/* 列表播放按钮 */
.btn-play-small {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--secondary-color);
    color: white;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
}

.btn-play-small:hover {
    background: var(--accent-color);
    transform: scale(1.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        position: relative;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding-left: 10px !important;
        padding-right: 10px !important;
    }
    
    .logo {
        position: static !important;
        flex: 0 0 auto;
    }
    
    .logo-text h1 {
        font-size: 14px;
    }
    
    .logo-text span {
        font-size: 7px;
    }
    
    .logo-img {
        width: 32px;
        height: 32px;
    }
    
    .nav-menu {
        display: none;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        padding: 15px;
        border-radius: 0 0 12px 12px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        z-index: 999;
    }
    
    .nav-menu.active {
        display: flex !important;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        padding: 15px;
        border-radius: 0 0 12px 12px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        z-index: 999;
    }
    
    .mobile-menu-btn {
        display: block !important;
        cursor: pointer;
        padding: 6px;
        font-size: 24px;
        color: var(--primary-color);
    }
    
    .mobile-menu-btn:hover {
        color: var(--secondary-color);
    }
    
    .navbar .container {
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 8px;
    }
    
    .logo {
        flex: 1;
    }
    
    .navbar {
        position: relative !important;
        padding: 10px 0 !important;
    }
    
    /* 隐藏桌面端按钮 */
    .auth-buttons.desktop-only {
        display: none !important;
    }
    
    .nav-menu li {
        display: block !important;
        margin: 3px 0;
    }
    
    .nav-menu li a {
        display: block;
        padding: 8px 12px;
    }
    
    /* 移动端显示登录注册按钮 */
    .nav-menu li.mobile-auth {
        display: inline-block !important;
        margin: 3px 0;
    }
    
    /* 移动端用户信息样式 */
    .nav-menu li.mobile-user {
        display: inline-block !important;
        margin: 3px 0;
    }
    
    .nav-menu li.mobile-user a {
        background: rgba(3, 105, 161, 0.1) !important;
        color: var(--primary-color) !important;
        border: 1.5px solid rgba(3, 105, 161, 0.3) !important;
        border-radius: 20px !important;
        padding: 6px 14px !important;
        margin: 4px 0 !important;
        font-weight: 500;
        display: inline-flex !important;
        gap: 6px;
        text-align: center;
        justify-content: center;
    }
    
    /* 移动端退出按钮 */
    .nav-menu li.mobile-logout a {
        background: rgba(239, 68, 68, 0.1) !important;
        color: #DC2626 !important;
        border: 1.5px solid rgba(239, 68, 68, 0.3) !important;
        border-radius: 20px !important;
        padding: 6px 14px !important;
        margin: 4px 0 !important;
        font-weight: 500;
        display: inline-flex !important;
        gap: 6px;
        text-align: center;
        justify-content: center;
    }
    
    .nav-menu li.mobile-auth a {
        background: rgba(255, 255, 255, 0.95) !important;
        color: var(--secondary-color) !important;
        border: 1.5px solid rgba(3, 105, 161, 0.3) !important;
        border-radius: 20px !important;
        padding: 6px 14px !important;
        margin: 4px 0 !important;
        font-weight: 500;
        display: inline-flex !important;
        gap: 6px;
        text-align: center;
        justify-content: center;
    }
    
    .nav-menu li.mobile-auth a:hover {
        background: rgba(255, 255, 255, 1) !important;
        border-color: var(--secondary-color) !important;
        box-shadow: 0 2px 8px rgba(3, 105, 161, 0.15) !important;
    }
    
    .tech-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .music-container {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .tech-circle {
        width: 150px;
        height: 150px;
    }
    
    .tech-circle i {
        font-size: 60px;
    }
}

@media (max-width: 480px) {
    .tech-stats {
        grid-template-columns: 1fr;
    }
    
    .apps-grid,
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        padding: 27px 18px;
        margin: 18px auto;
    }
}

/* 搜索结果显示样式 */
.search-results {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
    box-shadow: var(--shadow);
}

.search-result-item {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-result-item:last-child {
    border-bottom: none;
}

.result-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-dark);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-icon i {
    color: var(--primary-color);
}

.result-info {
    flex-grow: 1;
}

.result-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--primary-dark);
}

.result-info p {
    font-size: 14px;
    color: var(--text-light);
}

.result-action {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.result-action:hover {
    color: var(--primary-dark);
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* 消息提示 */
.message {
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.message.success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.message.error {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.message.warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(255, 193, 7, 0.2);
}

/* 文件浏览区域 */
.file-browser {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
    box-shadow: var(--shadow);
}

.file-list {
    max-height: 400px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.file-item:hover {
    background: var(--bg-dark);
}

.file-item:last-child {
    border-bottom: none;
}

.file-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-icon i {
    color: white;
    font-size: 20px;
}

.file-info {
    flex-grow: 1;
}

.file-name {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 3px;
}

.file-details {
    font-size: 12px;
    color: var(--text-light);
    display: flex;
    gap: 15px;
}

.file-action {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.file-action:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Logo图片样式 */
.logo-img {
    height: 50px;
    width: auto;
    margin-right: 15px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: var(--transition);
}

.logo-img:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 8px rgba(3, 105, 161, 0.2));
}

/* 公司展示板块 - 新布局 */
.company-showcase {
    margin-top: 20px;
}

.showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: stretch;
}

/* 左侧布局 - 自动分配间距 */
.showcase-left {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

/* 右侧布局 */
.showcase-right {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

/* 公司简介区块 */
.profile-section {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.profile-section .section-header {
    flex-shrink: 0;
}

.profile-section .company-image-card {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* 确保新闻和活动区块高度与左侧对应区块一致 */
.news-section {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.news-section .section-header {
    flex-shrink: 0;
}

/* 留言区块 */
.guestbook-section {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.guestbook-section .section-header {
    flex-shrink: 0;
}

.guestbook-section .guestbook-messages {
    flex: 1;
}

/* 活动区块 - 与留言对齐 */
.events-section {
    display: flex !important;
    flex-direction: column !important;
    flex: 1 !important;
    min-height: 460px !important;
}

.events-section .section-header {
    flex-shrink: 0;
}

/* 左侧公司图片 */
.company-image-card {
    padding: 30px 0;
}

.company-image-main {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--bg-dark), var(--bg-color));
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    /* 立体阴影效果 */
    box-shadow:
        /* 主阴影 - 营造悬浮感 */
        0 20px 40px rgba(15, 23, 42, 0.25),
        0 10px 20px rgba(15, 23, 42, 0.15),
        /* 顶部高光 - 增加立体感 */
        0 -4px 12px rgba(255, 255, 255, 0.3),
        /* 内阴影 - 增加深度 */
        inset 0 2px 4px rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(15, 23, 42, 0.1);
    transition: var(--transition);
}

/* 悬停时阴影加深 */
.company-image-main:hover {
    box-shadow:
        0 30px 60px rgba(15, 23, 42, 0.3),
        0 15px 30px rgba(15, 23, 42, 0.2),
        0 -4px 12px rgba(255, 255, 255, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(15, 23, 42, 0.1);
    transform: translateY(-4px);
}

.main-company-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.company-image-main:hover .main-company-img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 20px 20px;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9), transparent);
    color: white;
    text-align: center;
}

.image-overlay h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 5px;
}

.image-overlay p {
    font-size: 14px;
    opacity: 0.9;
}

.company-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.gallery-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 10px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.gallery-item:hover {
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    color: white;
    transform: translateY(-3px);
}

.gallery-item i {
    font-size: 20px;
    color: var(--secondary-color);
    transition: var(--transition);
}

.gallery-item:hover i {
    color: white;
}

.gallery-item span {
    font-size: 12px;
    font-weight: 500;
}

/* section-header 通用样式 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.section-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-header h3 i {
    color: var(--secondary-color);
}

/* 新闻列表 - 固定高度显示4项 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex: 1;
    min-height: 530px;
}

.news-item {
    display: flex;
    gap: 15px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    border-left: 3px solid transparent;
    min-height: 120px;
}

.news-item:hover {
    background: white;
    border-left-color: var(--logo-red);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 50px;
    padding: 10px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border-radius: var(--border-radius-sm);
    color: white;
    min-height: 60px;
}

.news-date .day {
    font-size: 20px;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
}

.news-date .month {
    font-size: 12px;
    opacity: 0.9;
}

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

.news-content h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.news-content p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
    width: 100%;
}

.news-tag {
    display: inline-block !important;
    padding: 2px 8px !important;
    background: rgba(3, 105, 161, 0.1) !important;
    color: var(--secondary-color) !important;
    font-size: 11px !important;
    font-weight: 500 !important;
    border-radius: 6px !important;
    width: auto !important;
    max-width: fit-content !important;
    flex-shrink: 0 !important;
}

/* 活动列表 */
.events-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex: 1;
    min-height: 415px;
}

.event-card {
    display: flex;
    gap: 15px;
    padding: 5px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.event-card:hover {
    background: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.event-image {
    width: 70px;
    height: 70px;
    min-width: 70px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.event-info {
    flex: 1;
    min-width: 0;
}

.event-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.event-info p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.event-info p i {
    color: var(--secondary-color);
    font-size: 12px;
}

.event-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 6px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.event-status {
    display: inline-block;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 20px;
    margin-top: 5px;
}

.event-status.ongoing {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.event-status.upcoming {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}



.logo-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.logo-text h1 {
    font-size: 24px;
    margin-bottom: 2px;
    color: var(--primary-dark);
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
}

.logo-text span {
    font-size: 10px;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

.footer-logo-img {
    height: 28px;
    width: auto;
    margin-bottom: 5px;
}

/* 文件浏览改进样式 */
.file-browser-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.file-browser-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
}

.file-browser-actions {
    display: flex;
    gap: 10px;
}

.file-path {
    background: var(--bg-dark);
    padding: 8px 15px;
    border-radius: var(--border-radius);
    font-family: monospace;
    font-size: 14px;
    color: var(--text-color);
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
}

.file-path i {
    color: var(--primary-color);
    margin-right: 8px;
}






/* 页面标题区域 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: 0;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.page-header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
    position: relative;
}

/* 区块头部工具栏 */
.section-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.section-header-bar .section-title {
    margin-bottom: 0;
}

.section-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 15px;
    color: var(--text-muted);
}

.search-box input {
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    width: 250px;
    background: white;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(3, 105, 161, 0.1);
}

.btn-refresh {
    padding: 12px 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-refresh:hover {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

/* 程序下载页面样式 */
.app-card.featured {
    position: relative;
    border: 2px solid var(--logo-red);
}

.app-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.app-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.app-meta .version {
    background: rgba(3, 105, 161, 0.1);
    color: var(--secondary-color);
    padding: 3px 10px;
    border-radius: 15px;
    font-weight: 500;
}

.app-meta .size {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 上传区域 */
.upload-section {
    margin-top: 40px;
}

.upload-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-xl);
    padding: 50px;
    text-align: center;
    box-shadow: var(--glass-shadow);
    border: 2px dashed var(--border-color);
    transition: var(--transition);
}

.upload-card:hover {
    border-color: var(--secondary-color);
    background: rgba(255, 255, 255, 0.9);
}

.upload-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 40px;
    box-shadow: 0 15px 35px -10px rgba(230, 57, 70, 0.4);
}

.upload-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.upload-card p {
    color: var(--text-light);
    margin-bottom: 25px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.btn-upload {
    padding: 14px 35px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.btn-upload:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px -5px rgba(230, 57, 70, 0.4);
}

/* 音乐页面样式 */
.music-player-full {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-xl);
    padding: 40px;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
}

.player-main {
    display: flex;
    gap: 40px;
    align-items: center;
}

.album-art {
    width: 250px;
    height: 250px;
    min-width: 250px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.3);
}

.album-art i {
    font-size: 100px;
    color: white;
    opacity: 0.8;
}

.playing-animation {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.3s;
}

.playing-animation.active {
    opacity: 1;
}

.playing-animation span {
    width: 4px;
    height: 20px;
    background: white;
    border-radius: 2px;
    animation: sound 0.5s ease-in-out infinite;
}

.playing-animation span:nth-child(2) {
    animation-delay: 0.1s;
}

.playing-animation span:nth-child(3) {
    animation-delay: 0.2s;
}

@keyframes sound {
    0%, 100% { height: 10px; }
    50% { height: 25px; }
}

.player-info {
    flex: 1;
}

.player-info h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 28px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.player-info p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.progress-container {
    margin-bottom: 30px;
}

.progress-bar-full {
    height: 6px;
    background: var(--bg-dark);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--logo-red), var(--logo-blue));
    border-radius: 3px;
    transition: width 0.3s;
}

.time-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
}

.player-controls-full {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    margin-bottom: 30px;
}

.play-btn-large {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px -5px rgba(230, 57, 70, 0.4);
    transition: var(--transition);
}

.play-btn-large:hover {
    transform: scale(1.1);
}

.volume-control {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: var(--text-light);
}

.volume-slider {
    width: 150px;
    height: 4px;
    -webkit-appearance: none;
    background: var(--bg-dark);
    border-radius: 2px;
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, var(--logo-red), var(--logo-blue));
    border-radius: 50%;
    cursor: pointer;
}

/* 音乐分类 */
.music-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.category-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition);
}

.category-card:hover,
.category-card.active {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
    background: white;
}

.category-card.active {
    border: 2px solid var(--secondary-color);
}

.category-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 28px;
}

.category-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.category-card p {
    font-size: 13px;
    color: var(--text-light);
}

/* 视频页面样式 */
.video-player-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-xl);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
}

.video-main {
    background: var(--primary-dark);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.video-placeholder {
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    cursor: pointer;
    transition: var(--transition);
}

.video-placeholder i {
    font-size: 80px;
    margin-bottom: 20px;
    opacity: 0.7;
    transition: var(--transition);
}

.video-placeholder:hover i {
    opacity: 1;
    transform: scale(1.1);
}

.video-placeholder.playing i {
    opacity: 0;
}

.video-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.8);
}

.video-controls .ctrl-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.video-controls .ctrl-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.video-progress {
    flex: 1;
}

.video-info-panel {
    display: flex;
    flex-direction: column;
}

.video-info-panel h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 22px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.video-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.video-meta-info span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-light);
}

.video-meta-info i {
    color: var(--secondary-color);
}

.video-description {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 25px;
    flex: 1;
}

.video-actions {
    display: flex;
    gap: 12px;
}

.btn-action {
    flex: 1;
    padding: 12px 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-action:hover {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

/* 视频分类 */
.video-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

/* 视频网格 */
.videos-grid-full {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.video-card-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    cursor: pointer;
}

.video-card-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.video-thumb {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.video-thumb i {
    font-size: 40px;
    color: white;
    opacity: 0.8;
}

.video-play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.video-card-item:hover .video-play-overlay {
    opacity: 1;
}

.video-play-overlay i {
    font-size: 50px;
    opacity: 1;
}

.video-card-info {
    padding: 20px;
}

.video-card-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }
    
    .player-main {
        flex-direction: column;
        text-align: center;
    }
    
    .video-player-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .access-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .music-categories,
    .video-categories {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 100px 0 40px;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .section-header-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .section-actions {
        width: 100%;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .access-grid,
    .music-categories,
    .video-categories {
        grid-template-columns: 1fr;
    }
    
    .album-art {
        width: 200px;
        height: 200px;
        min-width: 200px;
    }
    
    .logo-img {
        height: 40px;
    }
    
    .logo-text h1 {
        font-size: 20px;
    }
    
    .logo-text span {
        font-size: 9px;
    }
}

@media (max-width: 480px) {
    .logo {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo-img {
        height: 35px;
        margin-bottom: 5px;
    }
    
    .logo-text h1 {
        font-size: 18px;
    }
    
    .upload-card {
        padding: 30px 20px;
    }
}

/* 文件列表状态样式 */
.empty-state,
.error-state,
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state i,
.error-state i,
.loading-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p,
.error-state p,
.loading-state p {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-light);
}

.empty-state span,
.error-state span,
.loading-state span {
    font-size: 14px;
    color: var(--text-muted);
}

.error-state i {
    color: var(--danger-color);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

.loading-spinner-small {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 音乐分类筛选样式 */
.format-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 10px;
    vertical-align: middle;
}

.format-tag.mp3 {
    background: linear-gradient(135deg, #3B82F6, #1D4ED8);
    color: white;
}

.format-tag.flac {
    background: linear-gradient(135deg, #10B981, #059669);
    color: white;
}

.format-tag.wav {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
}

.category-count {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.category-card.active {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
}

.category-card {
    cursor: pointer;
    transition: var(--transition);
}

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

/* 音乐列表标题显示 */
.music-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.music-list-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.music-list-count {
    font-size: 14px;
    color: var(--text-muted);
    background: var(--bg-dark);
    padding: 4px 12px;
    border-radius: 20px;
}

/* 视频文件夹导航样式 */
.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 10px 0;
}

.folder-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.folder-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.folder-card .folder-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10B981, #059669);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}

.folder-card .folder-icon i {
    font-size: 28px;
    color: white;
}

.folder-card .folder-info {
    flex: 1;
}

.folder-card .folder-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.folder-card .folder-info p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 3px;
}

.folder-card .folder-info .folder-size {
    font-size: 12px;
    color: var(--text-muted);
}

.folder-card .folder-arrow {
    color: var(--text-muted);
}

.folder-card .folder-arrow i {
    font-size: 18px;
}

/* 清晰度标签 */
.quality-tag {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 700;
    margin-left: 8px;
    vertical-align: middle;
}

.quality-tag.4k {
    background: linear-gradient(135deg, #9333EA, #7C3AED);
    color: white;
}

.quality-tag.hd {
    background: linear-gradient(135deg, #3B82F6, #1D4ED8);
    color: white;
}

.quality-tag.sd {
    background: linear-gradient(135deg, #6B7280, #4B5563);
    color: white;
}

/* 面包屑导航 */
.breadcrumb-item {
    color: var(--accent-color);
    cursor: pointer;
    margin-left: 10px;
    padding: 4px 10px;
    background: var(--bg-dark);
    border-radius: 20px;
    font-size: 13px;
    transition: var(--transition);
}

.breadcrumb-item:hover {
    background: var(--accent-color);
    color: white;
}

.breadcrumb-item i {
    margin-right: 4px;
}

.file-path {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* 文件信息样式 */
.file-info {
    flex: 1;
    min-width: 0;
    margin: 0 12px;
}

.file-name {
    font-weight: 500;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.file-actions {
    display: flex;
    gap: 8px;
}

.btn-download-small {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.btn-download-small:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

/* 手机竖屏音乐列表优化 */
@media (max-width: 480px) {
    /* 音乐文件列表项优化 */
    .music-list-full .file-item,
    #music-file-list .file-item {
        padding: 12px 10px;
        gap: 10px;
    }
    
    .music-list-full .file-icon,
    #music-file-list .file-icon {
        width: 36px;
        height: 36px;
        min-width: 36px;
        border-radius: 8px;
    }
    
    .music-list-full .file-icon i,
    #music-file-list .file-icon i {
        font-size: 16px;
    }
    
    .music-list-full .file-info,
    #music-file-list .file-info {
        flex: 1;
        min-width: 0;
        margin: 0 8px;
    }
    
    .music-list-full .file-name,
    #music-file-list .file-name {
        font-size: 13px;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    
    .music-list-full .file-name i,
    #music-file-list .file-name i {
        font-size: 12px;
        margin-right: 0;
        flex-shrink: 0;
    }
    
    .music-list-full .file-meta,
    #music-file-list .file-meta {
        display: none; /* 手机上隐藏元数据，节省空间 */
    }
    
    .music-list-full .file-actions,
    #music-file-list .file-actions {
        display: flex;
        gap: 6px;
        flex-shrink: 0;
    }
    
    .music-list-full .btn-play-small,
    #music-file-list .btn-play-small,
    .music-list-full .btn-download-small,
    #music-file-list .btn-download-small {
        width: 32px;
        height: 32px;
        min-width: 32px;
        margin-right: 0;
    }
    
    .music-list-full .btn-play-small i,
    #music-file-list .btn-play-small i,
    .music-list-full .btn-download-small i,
    #music-file-list .btn-download-small i {
        font-size: 11px;
    }
    
    /* 格式标签优化 */
    .music-list-full .format-tag,
    #music-file-list .format-tag {
        font-size: 9px;
        padding: 1px 5px;
        margin-left: 4px;
    }
    
    /* 文件浏览器优化 */
    .file-browser {
        padding: 12px;
    }
    
    .file-path {
        font-size: 12px;
        padding: 6px 10px;
        margin-bottom: 10px;
    }
}

/* 手机竖屏视频列表优化 */
@media (max-width: 480px) {
    /* 视频文件列表项优化 */
    .video-list-full .file-item,
    #video-file-list .file-item {
        padding: 12px 10px;
        gap: 10px;
    }
    
    .video-list-full .file-icon,
    #video-file-list .file-icon {
        width: 36px;
        height: 36px;
        min-width: 36px;
        border-radius: 8px;
    }
    
    .video-list-full .file-icon i,
    #video-file-list .file-icon i {
        font-size: 16px;
    }
    
    .video-list-full .file-info,
    #video-file-list .file-info {
        flex: 1;
        min-width: 0;
        margin: 0 8px;
    }
    
    .video-list-full .file-name,
    #video-file-list .file-name {
        font-size: 12px;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: flex;
        align-items: center;
        gap: 4px;
        line-height: 1.3;
    }
    
    .video-list-full .file-name i,
    #video-file-list .file-name i {
        font-size: 11px;
        margin-right: 0;
        flex-shrink: 0;
    }
    
    .video-list-full .file-meta,
    #video-file-list .file-meta {
        display: none;
    }
    
    .video-list-full .file-actions,
    #video-file-list .file-actions {
        display: flex;
        gap: 4px;
        flex-shrink: 0;
    }
    
    .video-list-full .btn-play-small,
    #video-file-list .btn-play-small,
    .video-list-full .btn-download-small,
    #video-file-list .btn-download-small {
        width: 30px;
        height: 30px;
        min-width: 30px;
        margin-right: 0;
    }
    
    .video-list-full .btn-play-small i,
    #video-file-list .btn-play-small i,
    .video-list-full .btn-download-small i,
    #video-file-list .btn-download-small i {
        font-size: 10px;
    }
    
    /* 清晰度标签优化 */
    .video-list-full .quality-tag,
    #video-file-list .quality-tag {
        font-size: 8px;
        padding: 1px 4px;
        margin-left: 2px;
        flex-shrink: 0;
    }
}

/* 手机竖屏分类卡片优化 */
@media (max-width: 480px) {
    .music-categories,
    .video-categories {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px;
    }
    
    .music-categories .category-card,
    .video-categories .category-card {
        padding: 15px 10px;
    }
    
    .music-categories .category-icon,
    .video-categories .category-icon {
        width: 45px;
        height: 45px;
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .music-categories .category-card h3,
    .video-categories .category-card h3 {
        font-size: 13px;
        margin-bottom: 4px;
    }
    
    .music-categories .category-card p,
    .video-categories .category-card p {
        font-size: 10px;
        display: none;
    }
    
    .category-count {
        font-size: 10px;
    }
}

/* 手机竖屏文件夹卡片优化 */
@media (max-width: 480px) {
    .folder-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .folder-card {
        padding: 12px;
    }
    
    .folder-card .folder-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
        margin-right: 10px;
    }
    
    .folder-card .folder-icon i {
        font-size: 18px;
    }
    
    .folder-card .folder-info h4 {
        font-size: 14px;
        margin-bottom: 2px;
    }
    
    .folder-card .folder-info p {
        font-size: 11px;
        margin-bottom: 0;
    }
    
    .folder-card .folder-size {
        display: none;
    }
    
    .folder-card .folder-arrow {
        display: none;
    }
}

/* 手机竖屏搜索框优化 */
@media (max-width: 480px) {
    .section-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        width: 100%;
    }
    
    .search-box input {
        width: 100%;
        padding: 10px 12px 10px 40px;
        font-size: 13px;
    }
    
    .search-box i {
        left: 12px;
        font-size: 14px;
    }
    
    .btn-refresh {
        padding: 10px 16px;
        font-size: 13px;
        justify-content: center;
    }
}

/* 手机端主体内容顶部间距 */
@media (max-width: 768px) {
    main.container {
        padding-top: 100px !important;
    }
}

@media (max-width: 480px) {
    main.container {
        padding-top: 110px !important;
    }
}

/* 音乐子目录导航样式 */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.btn-back {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-back:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-back i {
    font-size: 12px;
}

/* 面包屑样式 */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    padding: 8px 12px;
    background: var(--bg-dark);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    margin-bottom: 10px;
}

.breadcrumb a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb .current {
    color: var(--text-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

.breadcrumb .current i {
    color: var(--warning-color);
}

.breadcrumb i.fa-chevron-right {
    color: var(--text-muted);
    font-size: 10px;
}

/* 文件夹条目样式 */
.folder-item {
    cursor: pointer;
    transition: var(--transition);
}

.folder-item:hover {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning-color) !important;
}

.folder-item .file-icon {
    background: linear-gradient(135deg, #F59E0B, #D97706) !important;
}

.btn-enter-folder {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-dark);
    border-radius: var(--border-radius-sm);
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-enter-folder:hover {
    background: var(--warning-color);
    color: white;
}

.btn-enter-folder i {
    font-size: 12px;
}

/* 子路径显示 */
.file-sub-path {
    font-size: 11px;
    color: var(--text-muted);
    margin-right: 4px;
    font-weight: normal;
}

/* 手机端子目录优化 */
@media (max-width: 480px) {
    .breadcrumb-nav {
        margin-bottom: 8px;
    }
    
    .btn-back {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .breadcrumb {
        font-size: 11px;
        padding: 6px 8px;
    }
    
    .folder-item .file-info {
        flex: 1;
        min-width: 0;
    }
    
    .folder-item .file-name {
        font-size: 13px;
    }
    
    .btn-enter-folder {
        width: 28px;
        height: 28px;
    }
}

/* 文件列表容器 - 显示15行 */
#music-file-list,
#video-file-list,
#program-file-list {
    max-height: 750px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-light) var(--bg-dark);
}

/* 桌面端文件列表样式 */
#music-file-list::-webkit-scrollbar,
#video-file-list::-webkit-scrollbar,
#program-file-list::-webkit-scrollbar {
    width: 8px;
}

#music-file-list::-webkit-scrollbar-track,
#video-file-list::-webkit-scrollbar-track,
#program-file-list::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-radius: 4px;
}

#music-file-list::-webkit-scrollbar-thumb,
#video-file-list::-webkit-scrollbar-thumb,
#program-file-list::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}

#music-file-list::-webkit-scrollbar-thumb:hover,
#video-file-list::-webkit-scrollbar-thumb:hover,
#program-file-list::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* 手机端文件列表样式 */
@media (max-width: 480px) {
    #music-file-list,
    #video-file-list,
    #program-file-list {
        max-height: 600px;
    }
}

/* 分类数量徽章样式 */
.category-count {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    min-width: 28px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(14, 165, 233, 0.3);
}

.category-card {
    position: relative;
}

/* 手机端数量徽章调整 */
@media (max-width: 480px) {
    .category-count {
        font-size: 10px;
        padding: 2px 8px;
        min-width: 24px;
        bottom: 8px;
        right: 8px;
    }
}

/* ==================== 安全保护样式 ==================== */

/* 验证码输入组 */
.captcha-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.captcha-input-group input {
    flex: 1;
    min-width: 100px;
}

/* 验证码画布 */
.captcha-canvas {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    background: #f0f3fa;
    height: 40px;
    width: 110px;
}

/* 刷新验证码按钮 */
.btn-refresh-captcha {
    padding: 8px 12px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.btn-refresh-captcha:hover {
    background: var(--bg-color);
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-refresh-captcha i {
    transition: transform 0.3s;
}

.btn-refresh-captcha:hover i {
    transform: rotate(180deg);
}

/* 错误提示 */
.form-error {
    color: var(--danger-color);
    font-size: 13px;
    padding: 8px 12px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--border-radius-sm);
    margin-bottom: 10px;
}

/* 成功提示 */
.form-success {
    color: var(--success-color);
    font-size: 13px;
    padding: 8px 12px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--border-radius-sm);
    margin-bottom: 10px;
}

/* 密码强度指示器 */
.password-strength {
    height: 4px;
    background: var(--bg-dark);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    width: 0;
    transition: all 0.3s;
}

.strength-weak { 
    width: 33%; 
    background: var(--danger-color); 
}

.strength-medium { 
    width: 66%; 
    background: var(--warning-color); 
}

.strength-strong { 
    width: 100%; 
    background: var(--success-color); 
}

/* 安全提示弹窗 */
.security-notice {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--logo-red), #C53030);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 14px;
    z-index: 999999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: opacity 0.3s ease;
}

/* 手机端验证码调整 */
@media (max-width: 480px) {
    .captcha-input-group {
        flex-wrap: wrap;
    }
    
    .captcha-canvas {
        width: 80px !important;
        height: 32px;
    }
    
    .captcha-input-group input {
        min-width: 100px;
    }
}

/* 新闻和活动刷新按钮 */
.refresh-btn-small {
    padding: 6px 12px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-light);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.refresh-btn-small:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.refresh-btn-small i {
    font-size: 11px;
}

.refresh-btn-small:hover i {
    transform: rotate(180deg);
    display: inline-block;
}

/* 新闻列表容器 */
#newsListContainer {
    max-height: 530px;
    overflow-y: auto;
}

#newsListContainer::-webkit-scrollbar {
    width: 6px;
}

#newsListContainer::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-radius: 3px;
}

#newsListContainer::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* 活动列表容器 */
#eventsListContainer {
    max-height: 445px;
    overflow-y: auto;
}

#eventsListContainer::-webkit-scrollbar {
    width: 6px;
}

#eventsListContainer::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-radius: 3px;
}

#eventsListContainer::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* 手机端刷新按钮 */
@media (max-width: 480px) {
    .refresh-btn-small {
        padding: 5px 10px;
        font-size: 11px;
    }
}

/* ==================== 虚拟滚动和分页样式 ==================== */

/* 音乐/视频总数显示 */
.music-total-count,
.video-total-count {
    font-size: 13px;
    font-weight: normal;
    color: var(--text-muted);
    margin-left: 10px;
}

/* 加载更多容器 */
.load-more-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
}

/* 加载更多按钮 */
.btn-load-more {
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-load-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(14, 165, 233, 0.4);
}

.btn-load-more:active {
    transform: translateY(0);
}

.btn-load-more i {
    font-size: 12px;
}

.btn-load-more.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 加载更多信息 */
.load-more-info {
    font-size: 12px;
    color: var(--text-muted);
}

/* 虚拟滚动占位容器 */
#virtual-scroll-container {
    position: relative;
    width: 100%;
}

/* 懒加载占位符 */
.music-item.lazy-placeholder {
    opacity: 0.3;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

/* 虚拟滚动列表项 */
.virtual-list-item {
    position: absolute;
    left: 0;
    right: 0;
    will-change: transform;
}

/* 移动端加载更多按钮 */
@media (max-width: 480px) {
    .btn-load-more {
        padding: 10px 24px;
        font-size: 13px;
        width: 100%;
        justify-content: center;
    }
    
    .load-more-container {
        padding: 15px;
    }
    
    .music-total-count,
    .video-total-count {
        font-size: 12px;
        margin-left: 8px;
    }
}

/* 滚动加载提示 */
.scroll-loading-hint {
    text-align: center;
    padding: 10px;
    color: var(--text-muted);
    font-size: 12px;
}