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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', Roboto, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #60a5fa 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 简化背景效果 - 移除复杂动画以提升性能 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(1px 1px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent);
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}


/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-top: 60px;
}

.hero {
    margin-bottom: 80px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    text-shadow: 0 1px 10px rgba(0,0,0,0.2);
}

/* Button Styles */
.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px 30px;
    max-width: 600px;
    margin: 0 auto 30px;
}

/* 其他功能按钮 */
.other-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    align-items: flex-start;
}

/* Win下载按钮包装器 */
.win-download-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
}

/* Mac下载按钮包装器 */
.mac-download-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-width: 180px;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(238, 90, 36, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.1);
}

.btn-mac {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    border: 2px solid transparent;
}

.btn-mac:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 117, 125, 0.4);
    background: linear-gradient(135deg, #495057, #343a40);
}

.btn-qq {
    background: linear-gradient(135deg, #4a90e2, #357abd);
    color: white !important;
    border: 2px solid transparent;
}

.btn-qq:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(74, 144, 226, 0.4);
    background: linear-gradient(135deg, #357abd, #2968a3);
    color: white !important;
}

.btn-qq .btn-text {
    color: white !important;
}

.btn-qq:hover .btn-text {
    color: white !important;
}

/* 备用下载按钮样式 */
.btn-backup {
    background: rgba(16, 185, 129, 0.15);
    color: white;
    border: 2px solid rgba(16, 185, 129, 0.5);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    font-size: 0.85rem;
    width: 100%;
    position: relative;
    flex-wrap: wrap;
    gap: 6px;
    min-width: auto;
}

.btn-backup:hover {
    background: rgba(16, 185, 129, 0.25);
    border-color: rgba(16, 185, 129, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(16, 185, 129, 0.3);
}

.btn-backup .btn-text {
    font-size: 0.85rem;
    font-weight: 500;
}

.extraction-code {
    display: inline-flex;
    align-items: center;
    background: rgba(251, 191, 36, 0.25);
    color: #fbbf24;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(251, 191, 36, 0.4);
    white-space: nowrap;
}

/* QQ群交流悬停容器 */
.qq-group-container {
    position: relative;
    display: inline-block;
}

/* 箭头指示器 */
.arrow-indicator {
    position: absolute;
    top: -45px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    animation: bounce 2s infinite;
    z-index: 100;
}

.arrow-indicator svg {
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}

.arrow-text {
    font-size: 0.8rem;
    color: #ffeb3b;
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
    white-space: nowrap;
    background: rgba(0,0,0,0.4);
    padding: 4px 8px;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

/* 悬停时隐藏箭头指示器 */
.qq-group-container:hover .arrow-indicator {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

/* 弹跳动画 */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.qq-qr-code {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 10px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    background: white;
    border-radius: 15px;
    padding: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(74, 144, 226, 0.1);
    z-index: 1001;
    pointer-events: none;
}

.qq-group-container:hover .qq-qr-code {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.qq-qr-code img {
    width: 300px !important;
    height: auto !important;
    max-height: 500px !important;
    border-radius: 10px;
    display: block;
    object-fit: contain;
}

/* 添加小箭头指向按钮 */
.qq-qr-code::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid white;
}

.btn-icon {
    transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Download Section */
.download-section {
    width: 100%;
    max-width: 900px;
    text-align: center;
}

.download-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: white;
    margin-bottom: 40px;
    text-shadow: 0 1px 10px rgba(0,0,0,0.3);
}

/* Platform Section */
.platform-section {
    margin-bottom: 50px;
}

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

.platform-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: white;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-shadow: 0 1px 8px rgba(0,0,0,0.3);
}

.platform-icon {
    color: rgba(255, 255, 255, 0.9);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.version-button-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Version Button Styles - 基于现有 .btn 样式 */
.btn-version {
    min-width: 200px;
    position: relative;
}

.recommend-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: linear-gradient(45deg, #f59e0b, #eab308);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
    z-index: 1;
}

/* 稳定版样式 - 蓝色主题 */
.btn-stable {
    background: #3b82f6;
    border: 2px solid #2563eb;
    color: white;
}

.btn-stable:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

/* 主流版样式 - 蓝色主题 */
.btn-mainstream {
    background: #3b82f6;
    border: 2px solid #2563eb;
    color: white;
}

.btn-mainstream:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

/* 最新版样式 - 蓝色主题 */
.btn-latest {
    background: #3b82f6;
    border: 2px solid #2563eb;
    color: white;
}

.btn-latest:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

/* 底部滚动字幕样式 */
.bottom-marquee-container {
    width: 100%;
    margin: 40px 0 0 0;
    background: rgba(255, 87, 51, 0.2);
    border: 2px solid rgba(255, 87, 51, 0.4);
    border-radius: 0;
    padding: 16px 0;
    overflow: hidden;
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 20px rgba(255, 87, 51, 0.1);
}

.bottom-marquee-content {
    display: flex;
    white-space: nowrap;
    animation: scroll-left 20s linear infinite;
}

.bottom-marquee-text {
    padding-right: 100px;
    font-size: 1.2rem;
    font-weight: 600;
    color: #ffeb3b;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
    display: inline-block;
}

.bottom-marquee-container:hover .bottom-marquee-content {
    animation-play-state: paused;
}

/* 滚动动画 */
@keyframes scroll-left {
    0% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(-100%);
    }
}


/* 顶部安全提示条 */
.top-security-banner {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 30px;
    background: rgba(16, 185, 129, 0.15);
    border: 2px solid rgba(16, 185, 129, 0.4);
    border-radius: 12px;
    padding: 15px 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
}

.banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.security-icon {
    font-size: 1.2rem;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.3));
}

.banner-text {
    color: white;
    font-size: 1rem;
    font-weight: 500;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
    flex: 1;
    text-align: center;
    min-width: 200px;
}

.learn-more {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    font-weight: 400;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* 快速解决方案样式 */
.quick-solution {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 30px;
    background: rgba(74, 144, 226, 0.1);
    border: 2px solid rgba(74, 144, 226, 0.3);
    border-radius: 15px;
    padding: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.15);
}

.solution-content h4 {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-align: center;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.solution-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 12px 15px;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.solution-item:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.solution-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.solution-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.solution-text strong {
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.solution-text span {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.8rem;
    font-weight: 400;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

/* 安全说明样式 */
.security-notice {
    width: 100%;
    max-width: 900px;
    margin: 40px auto 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(74, 144, 226, 0.3);
}

.notice-content h3 {
    color: #2563eb;
    font-size: 1.4rem;
    margin-bottom: 25px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: center;
    justify-content: center;
}

.security-section {
    margin-bottom: 25px;
    padding: 20px;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 10px;
    border-left: 4px solid #3b82f6;
}

.security-section h4 {
    color: #1d4ed8;
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.instruction-list, .reason-list, .guarantee-list {
    margin: 0;
    padding-left: 20px;
    color: #333;
}

.instruction-list li, .reason-list li, .guarantee-list li {
    margin-bottom: 8px;
    line-height: 1.6;
    font-size: 0.95rem;
}

.instruction-list li strong {
    color: #1d4ed8;
    font-weight: 600;
}

.reason-list li {
    list-style-type: disc;
}

.guarantee-list li {
    list-style-type: none;
    position: relative;
    padding-left: 0;
    color: #059669;
    font-weight: 500;
}

.disclaimer {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 2px solid #f59e0b;
    border-radius: 10px;
    padding: 15px 20px;
    margin-top: 20px;
    color: #92400e;
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: center;
}

.disclaimer strong {
    color: #b45309;
}

.notice-content p {
    color: #333;
    font-size: 1rem;
    margin-bottom: 12px;
    line-height: 1.8;
    text-align: left;
}

.notice-content p:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 20px;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main {
        padding-top: 40px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .button-group {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 320px;
    }
    
    .other-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .bottom-marquee-text {
        font-size: 1rem;
        padding-right: 80px;
    }
    
    .download-title {
        font-size: 1.4rem;
        margin-bottom: 30px;
    }
    
    .platform-section {
        margin-bottom: 40px;
    }
    
    .platform-title {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }
    
    .platform-icon {
        width: 20px;
        height: 20px;
    }
    
    .version-button-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-version {
        min-width: 260px;
    }
    
    .win-download-wrapper {
        width: 100%;
        max-width: 280px;
    }
    
    .btn-backup {
        width: 100%;
        min-width: auto;
    }
    
    .top-security-banner {
        margin: 0 15px 25px;
        padding: 12px 15px;
    }
    
    .banner-content {
        flex-direction: column;
        gap: 8px;
    }
    
    .banner-text {
        font-size: 0.9rem;
        min-width: auto;
    }
    
    .learn-more {
        font-size: 0.8rem;
    }
    
    .security-notice {
        padding: 20px;
        margin: 30px 15px 20px;
    }
    
    .notice-content h3 {
        font-size: 1.2rem;
    }
    
    .notice-content p {
        font-size: 0.9rem;
    }
    
    /* 快速解决方案移动端适配 */
    .quick-solution {
        margin: 0 15px 25px;
        padding: 15px;
    }
    
    .solution-content h4 {
        font-size: 1rem;
        margin-bottom: 12px;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .solution-item {
        padding: 10px 12px;
        gap: 10px;
    }
    
    .solution-icon {
        font-size: 1.3rem;
    }
    
    .solution-text strong {
        font-size: 0.85rem;
    }
    
    .solution-text span {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .main {
        padding-top: 30px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .bottom-marquee-text {
        font-size: 0.9rem;
        padding-right: 60px;
    }
    
    .download-title {
        font-size: 1.2rem;
        margin-bottom: 25px;
    }
    
    .platform-section {
        margin-bottom: 35px;
    }
    
    .platform-title {
        font-size: 1.1rem;
        margin-bottom: 18px;
    }
    
    .platform-icon {
        width: 18px;
        height: 18px;
    }
    
    .btn-version {
        min-width: 100%;
        max-width: 280px;
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .recommend-badge {
        top: -6px;
        right: -6px;
        font-size: 0.6rem;
        padding: 3px 6px;
    }
    
    /* QQ群二维码移动端适配 */
    .qq-qr-code {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .qq-qr-code img {
        width: 280px !important;
        height: auto !important;
        max-height: 90vh;
    }
    
    /* 箭头指示器移动端适配 */
    .arrow-indicator {
        top: -40px;
    }
    
    .arrow-text {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
    
    .arrow-indicator svg {
        width: 30px;
        height: 25px;
    }
    
    .win-download-wrapper {
        width: 100%;
        max-width: 280px;
    }
    
    .mac-download-wrapper {
        width: 100%;
        max-width: 280px;
    }
    
    .btn-backup {
        width: 100%;
        min-width: auto;
        font-size: 0.85rem;
        padding: 10px 16px;
    }
    
    .btn-backup .btn-text {
        font-size: 0.8rem;
    }
    
    .extraction-code {
        font-size: 0.7rem;
        padding: 2px 8px;
    }
    
    /* 快速解决方案最小屏幕适配 */
    .quick-solution {
        margin: 0 10px 20px;
        padding: 12px;
    }
    
    .solution-content h4 {
        font-size: 0.95rem;
        margin-bottom: 10px;
    }
    
    .solution-grid {
        gap: 10px;
    }
    
    .solution-item {
        padding: 8px 10px;
        gap: 8px;
    }
    
    .solution-icon {
        font-size: 1.2rem;
    }
    
    .solution-text strong {
        font-size: 0.8rem;
    }
    
    .solution-text span {
        font-size: 0.7rem;
    }
}