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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    min-height: 100vh;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    overflow-x: hidden;
}

.bing-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: #fff;
    display: flex;
    align-items: center;
    padding: 0 20px;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border-bottom: 1px solid #e0e0e0;
}

.bing-logo {
    display: flex;
    align-items: center;
}

.bing-logo svg {
    display: block;
}

.bg-effects {
    position: fixed;
    top: 50px;
    left: 0;
    width: 100%;
    height: calc(100% - 50px);
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 120, 212, 0.15), transparent 70%);
    top: -200px;
    right: -200px;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 120, 212, 0.1), transparent 70%);
    bottom: -100px;
    left: -100px;
}

.sparkle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #0078D4;
    border-radius: 50%;
    animation: sparkle 2s ease-in-out infinite;
}

.s1 { top: 20%; left: 10%; animation-delay: 0s; }
.s2 { top: 40%; right: 15%; animation-delay: 0.5s; }
.s3 { bottom: 30%; left: 20%; animation-delay: 1s; }
.s4 { bottom: 50%; right: 25%; animation-delay: 1.5s; }

@keyframes sparkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

.header {
    position: fixed;
    top: 50px;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 15px 40px;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid #e0e0e0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-icon {
    font-size: 32px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: #0078D4;
}

.nav {
    display: flex;
    gap: 25px;
}

.nav-link {
    color: #666;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
    font-size: 15px;
}

.nav-link:hover {
    background: rgba(0, 120, 212, 0.1);
    color: #0078D4;
}

.nav-link.active {
    background: #0078D4;
    color: #fff;
}

.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 150px 20px 60px;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-content {
    max-width: 700px;
}

.live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 120, 212, 0.1);
    border: 1px solid #0078D4;
    padding: 8px 20px;
    border-radius: 30px;
    margin-bottom: 30px;
    font-weight: 600;
    font-size: 14px;
    color: #0078D4;
}

.live-dot {
    width: 8px;
    height: 8px;
    background: #ff0000;
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

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

.logo-main {
    font-size: 100px;
    margin-bottom: 20px;
    animation: bounce 2s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(0, 120, 212, 0.3));
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #0078D4, #005a9e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: #666;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #0078D4, #005a9e);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 120, 212, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 120, 212, 0.6);
}

.btn-secondary {
    background: rgba(0, 120, 212, 0.1);
    color: #0078D4;
    border: 1px solid rgba(0, 120, 212, 0.3);
}

.btn-secondary:hover {
    background: rgba(0, 120, 212, 0.2);
    transform: translateY(-3px);
}

.stats-bar {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-top: 60px;
    padding: 25px 50px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: #0078D4;
}

.stat-label {
    display: block;
    color: #666;
    font-size: 14px;
    margin-top: 5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: #e0e0e0;
}

.streams-section,
.categories-section,
.features-section {
    padding: 80px 40px;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #333;
}

.section-desc {
    color: #666;
}

.streams-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.stream-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s;
}

.stream-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 120, 212, 0.15);
    border-color: #0078D4;
}

.stream-thumb {
    height: 180px;
    background: linear-gradient(135deg, #f5f7fa, #e4e8ec);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.thumb-icon {
    font-size: 64px;
}

.live-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    align-items: center;
    gap: 5px;
    background: rgba(255, 0, 0, 0.9);
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
}

.viewer-count {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.7);
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 13px;
    color: #fff;
}

.stream-info {
    padding: 20px;
}

.streamer {
    display: flex;
    align-items: center;
    gap: 12px;
}

.streamer-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0078D4, #005a9e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.streamer-details h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: #333;
}

.streamer-details p {
    color: #666;
    font-size: 14px;
}

.cat-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    max-width: 800px;
    margin: 0 auto;
}

.cat-item {
    background: rgba(0, 120, 212, 0.1);
    border: 1px solid rgba(0, 120, 212, 0.3);
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 15px;
    transition: all 0.3s;
    cursor: pointer;
    color: #333;
}

.cat-item:hover {
    background: rgba(0, 120, 212, 0.2);
    transform: translateY(-3px);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    transition: all 0.3s;
}

.feature-item:hover {
    background: #fff;
    transform: translateY(-8px);
    border-color: #0078D4;
    box-shadow: 0 10px 30px rgba(0, 120, 212, 0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.feature-item p {
    color: #666;
    font-size: 14px;
}

.download-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 150px 20px 60px;
    position: relative;
    z-index: 1;
}

.download-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 30px;
    padding: 50px;
    max-width: 480px;
    width: 100%;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.card-visual {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
}

.app-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #0078D4, #005a9e);
    border-radius: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    position: relative;
    z-index: 1;
    box-shadow: 0 15px 40px rgba(0, 120, 212, 0.3);
}

.glow-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border: 2px solid rgba(0, 120, 212, 0.3);
    border-radius: 50%;
    animation: expand 2s ease-in-out infinite;
}

@keyframes expand {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

.card-info h1 {
    font-size: 32px;
    margin-bottom: 8px;
    color: #333;
}

.tagline {
    color: #666;
    font-size: 16px;
}

.version-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
}

.version-tag {
    background: linear-gradient(135deg, #0078D4, #005a9e);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.update-time {
    color: #999;
    font-size: 14px;
}

.specs-grid {
    background: #f5f7fa;
    border-radius: 16px;
    padding: 20px;
    margin: 25px 0;
    text-align: left;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 0;
    border-bottom: 1px solid #e0e0e0;
}

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

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

.spec-content {
    flex: 1;
    display: flex;
    justify-content: space-between;
}

.spec-label {
    color: #999;
}

.spec-value {
    color: #0078D4;
    font-weight: 500;
}

.highlights {
    background: #f5f7fa;
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 25px;
    text-align: left;
}

.highlights h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: #0078D4;
}

.highlights ul {
    list-style: none;
}

.highlights li {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
}

.btn-download {
    width: 100%;
    justify-content: center;
    font-size: 18px;
    padding: 18px;
}

.back-link {
    display: inline-block;
    margin-top: 25px;
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
}

.back-link:hover {
    color: #0078D4;
}

.error-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 150px 20px 60px;
    position: relative;
    z-index: 1;
}

.error-content {
    text-align: center;
}

.error-visual {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 40px;
}

.broken-tiger {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tiger-icon {
    font-size: 80px;
    opacity: 0.6;
}

.question-mark {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 50px;
    height: 50px;
    background: rgba(0, 120, 212, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    color: #0078D4;
}

.error-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 120, 212, 0.1), transparent 70%);
    border-radius: 50%;
}

.error-code {
    font-size: 120px;
    font-weight: 900;
    color: rgba(0, 120, 212, 0.1);
    line-height: 1;
    margin-bottom: 20px;
}

.error-title {
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.error-message {
    color: #666;
    font-size: 18px;
    margin-bottom: 40px;
}

.error-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.footer {
    text-align: center;
    padding: 30px;
    color: #999;
    font-size: 14px;
    position: relative;
    z-index: 1;
}

.footer a {
    color: #0078D4;
    text-decoration: none;
    transition: color 0.3s;
}

.footer a:hover {
    color: #005a9e;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .stats-bar {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-divider {
        width: 50px;
        height: 1px;
    }
    
    .streams-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: 15px 20px;
    }
    
    .nav {
        display: none;
    }
    
    .download-card {
        padding: 30px 20px;
    }
    
    .error-actions {
        flex-direction: column;
    }
}