body {
    font-family: 'Roboto', '微软雅黑', sans-serif;
    margin: 0;
    background: #f5f6fa;
    color: #222;
}
.navbar {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow 0.3s;
}
.navbar.scrolled {
    box-shadow: 0 4px 16px rgba(37,99,235,0.13);
    background: #f8fafc;
}
.navbar .logo {
    font-size: 2.2em;
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(37,99,235,0.15);
    background: linear-gradient(90deg, #ff7c2d 30%, #2563eb 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}
.navbar .logo:hover {
    transform: scale(1.05);
    text-shadow: 3px 3px 6px rgba(37,99,235,0.2);
}
.navbar .logo .logo-cn {
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-size: 0.6em;
    font-weight: bold;
    background: linear-gradient(90deg, #2563eb 10%, #ff7c2d 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 8px;
    letter-spacing: 1px;
    opacity: 0.9;
}
.navbar nav a {
    color: #222;
    text-decoration: none;
    margin-left: 28px;
    font-size: 1.08em;
    transition: color 0.2s, transform 0.2s;
    position: relative;
}
.navbar nav a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width .3s;
    position: absolute;
    left: 0;
    bottom: -4px;
}
.navbar nav a:hover {
    color: #2563eb;
    transform: translateY(-2px) scale(1.08);
}
.navbar nav a:hover::after {
    width: 100%;
}
.anchor-block {
    scroll-margin-top: 70px;
}

/* 首页区块 - 重新设计 */
.section-home {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 400% 400%;
    animation: gradientShift 8s ease-in-out infinite;
    color: #fff;
    padding: 80px 0 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* 动态渐变背景 */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 改进的气泡动画 */
.bubble {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
    animation: floatBubble 15s ease-in-out infinite;
    pointer-events: none;
    filter: blur(1px);
}

.bubble:nth-child(1) {
    width: 80px;
    height: 80px;
    left: 10%;
    bottom: -60px;
    background: rgba(255, 255, 255, 0.8);
    animation-delay: 0s;
    animation-duration: 18s;
}

.bubble:nth-child(2) {
    width: 60px;
    height: 60px;
    left: 30%;
    bottom: -40px;
    background: rgba(255, 124, 45, 0.7);
    animation-delay: 2s;
    animation-duration: 16s;
}

.bubble:nth-child(3) {
    width: 100px;
    height: 100px;
    left: 70%;
    bottom: -80px;
    background: rgba(37, 99, 235, 0.6);
    animation-delay: 4s;
    animation-duration: 20s;
}

.bubble:nth-child(4) {
    width: 50px;
    height: 50px;
    left: 80%;
    bottom: -30px;
    background: rgba(255, 255, 255, 0.5);
    animation-delay: 6s;
    animation-duration: 14s;
}

.bubble:nth-child(5) {
    width: 40px;
    height: 40px;
    left: 50%;
    bottom: -20px;
    background: rgba(96, 165, 250, 0.6);
    animation-delay: 8s;
    animation-duration: 17s;
}

@keyframes floatBubble {
    0% {
        transform: translateY(0) scale(1) rotate(0deg);
        opacity: 0.3;
    }
    25% {
        transform: translateY(-100px) scale(1.1) rotate(90deg);
        opacity: 0.4;
    }
    50% {
        transform: translateY(-200px) scale(0.9) rotate(180deg);
        opacity: 0.3;
    }
    75% {
        transform: translateY(-300px) scale(1.2) rotate(270deg);
        opacity: 0.2;
    }
    100% {
        transform: translateY(-400px) scale(0.8) rotate(360deg);
        opacity: 0;
    }
}

/* 添加浮动粒子效果 */
.section-home::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 1px, transparent 1px),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 1px, transparent 1px),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 100px 100px, 150px 150px, 200px 200px;
    animation: particleFloat 20s linear infinite;
    pointer-events: none;
}

@keyframes particleFloat {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-100px); }
}

/* 主标题样式改进 */
.main-title {
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-size: 3.2em;
    font-weight: bold;
    letter-spacing: 4px;
    margin-bottom: 24px;
    animation: titleGlow 2s ease-in-out infinite alternate;
    text-shadow: 0 0 20px rgba(255,255,255,0.3);
    line-height: 1.2;
    position: relative;
    z-index: 2;
}

@keyframes titleGlow {
    from { 
        text-shadow: 0 0 20px rgba(255,255,255,0.3);
        transform: scale(1);
    }
    to { 
        text-shadow: 0 0 30px rgba(255,255,255,0.5), 0 0 40px rgba(255,255,255,0.3);
        transform: scale(1.02);
    }
}

/* 副标题样式改进 */
.section-home p {
    font-size: 1.4em;
    margin-bottom: 40px;
    animation: fadeInUp 1.5s ease-out 0.5s both;
    font-weight: 400;
    letter-spacing: 1.5px;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 添加装饰性元素 */
.section-home::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, rgba(255,255,255,0.1), transparent);
    pointer-events: none;
}

/* 改进的动画效果 */
@keyframes fadeInDown {
    from { 
        opacity: 0; 
        transform: translateY(-60px) scale(0.9);
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeInUp {
    from { 
        opacity: 0; 
        transform: translateY(60px) scale(0.9);
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1);
    }
}

/* 资源下载区块 - 重新设计 */
.section-download {
    background: linear-gradient(135deg, #f8fafc 60%, #e0e7ef 100%);
    border-radius: 24px;
    margin: 40px 0;
    box-shadow: 0 4px 20px rgba(37,99,235,0.08);
    padding: 40px 24px;
}

.section-download .section-title {
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-size: 2.4em;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #2563eb 10%, #ff7c2d 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: #64748b;
    font-size: 1.1em;
    margin-bottom: 40px;
    font-weight: 500;
}

/* 下载网格布局 */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

/* 下载卡片样式 */
.download-card {
    background: #fff;
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 4px 20px rgba(37,99,235,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #60a5fa);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(37,99,235,0.15);
    border-color: #e2e8f0;
}

.download-card:hover::before {
    opacity: 1;
}

/* 系统下载卡片特殊样式 */
.system-card:hover {
    border-color: #2563eb;
    box-shadow: 0 12px 40px rgba(37,99,235,0.2);
}

/* Office下载卡片特殊样式 */
.office-card:hover {
    border-color: #ff7c2d;
    box-shadow: 0 12px 40px rgba(255,124,45,0.2);
}

/* 维护工具卡片特殊样式 */
.tools-card:hover {
    border-color: #10b981;
    box-shadow: 0 12px 40px rgba(16,185,129,0.2);
}

/* 卡片头部 */
.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 16px;
}

.card-icon {
    font-size: 2.5em;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    border-radius: 16px;
    flex-shrink: 0;
}

.card-title h3 {
    color: #1e293b;
    font-size: 1.4em;
    margin: 0 0 4px 0;
    font-weight: bold;
}

.card-subtitle {
    color: #64748b;
    font-size: 0.9em;
    font-weight: 500;
}

/* 卡片内容 */
.card-content {
    margin-bottom: 24px;
}

.card-content p {
    color: #475569;
    line-height: 1.6;
    margin: 0 0 16px 0;
    font-size: 1em;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feature-tag {
    background: #f1f5f9;
    color: #475569;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

/* 卡片操作按钮 */
.card-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.primary-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 0.95em;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 120px;
    justify-content: center;
    white-space: nowrap;
    text-align: center;
    box-sizing: border-box;
}

.primary-btn {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.primary-btn:hover {
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37,99,235,0.4);
}

.secondary-btn {
    background: #f8fafc;
    color: #475569;
    border: 2px solid #e2e8f0;
}

.secondary-btn:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    color: #1e293b;
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.1em;
    flex-shrink: 0;
}

/* 可展开式区块样式 */
.expandable-section {
    margin-bottom: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.08);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.expandable-section:hover {
    box-shadow: 0 6px 20px rgba(37,99,235,0.15);
    transform: translateY(-2px);
}
.expandable-header {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.expandable-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37,99,235,0.05) 0%, rgba(37,99,235,0.02) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.expandable-header:hover::before {
    opacity: 1;
}
.expandable-header:hover {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    transform: translateY(-1px);
}
.expandable-title {
    color: #2563eb;
    font-size: 1.3em;
    font-weight: bold;
    margin: 0;
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}
.expandable-header:hover .expandable-title {
    transform: translateX(4px);
}
.expand-icon {
    color: #2563eb;
    font-size: 1.8em;
    font-weight: bold;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
    line-height: 1;
}
.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background: #fff;
    opacity: 0;
    transform: translateY(-10px);
}
.expandable-content.active {
    max-height: 3000px;
    opacity: 1;
    transform: translateY(0);
}
.expandable-content.active + .expandable-header .expand-icon {
    transform: rotate(45deg) scale(1.1);
}

/* 子分类样式 */
.sub-category {
    margin-bottom: 30px;
    padding: 0 24px;
}
.sub-category:last-child {
    margin-bottom: 0;
}
.sub-category-title {
    color: #1e40af;
    font-size: 1.4em;
    font-weight: bold;
    margin: 20px 0 16px 0;
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    letter-spacing: 1px;
    position: relative;
    padding-left: 16px;
}
.sub-category-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #2563eb, #60a5fa);
    border-radius: 2px;
}

.soft-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
    margin: 0;
    padding: 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.expandable-content.active .soft-list {
    opacity: 1;
    transform: translateY(0);
}
.soft-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(37,99,235,0.06);
    padding: 24px 18px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    opacity: 0;
    transform: translateY(40px);
    animation: cardFadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.soft-card:nth-child(1) { animation-delay: 0.1s;}
.soft-card:nth-child(2) { animation-delay: 0.2s;}
.soft-card:nth-child(3) { animation-delay: 0.3s;}
.soft-card:nth-child(4) { animation-delay: 0.4s;}
@keyframes cardFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.soft-card:hover {
    box-shadow: 0 12px 40px rgba(37,99,235,0.15);
    transform: translateY(-8px) scale(1.02);
}
.soft-card img {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    margin-bottom: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.soft-card:hover img {
    transform: rotate(-8deg) scale(1.1);
}
.soft-card h3 {
    margin: 10px 0 8px 0;
    color: #2563eb;
    font-size: 1.15em;
    transition: color 0.3s ease;
}
.soft-card:hover h3 {
    color: #1e40af;
}
.soft-card p {
    font-size: 0.98em;
    color: #444;
    min-height: 44px;
    transition: color 0.3s ease;
}
.soft-card:hover p {
    color: #666;
}

/* 卡片按钮组样式 */
.card-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 12px;
}
.card-btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    padding: 8px 24px;
    border-radius: 20px;
    font-size: 0.98em;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}
.card-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 ease;
}
.card-btn:hover::before {
    left: 100%;
}
.card-btn:hover {
    background: #1e40af;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.detail-btn {
    display: inline-block;
    background: #f8fafc;
    color: #2563eb;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.95em;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid #e2e8f0;
    cursor: pointer;
    font-weight: 500;
}
.detail-btn:hover {
    background: #2563eb;
    color: #fff;
    border-color: #2563eb;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(37,99,235,0.2);
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.modal-content {
    background-color: #fff;
    margin: 5% auto;
    padding: 0;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideIn 0.3s ease;
    overflow: hidden;
}
@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.modal-header {
    background: linear-gradient(135deg, #2563eb 0%, #60a5fa 100%);
    color: #fff;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h2 {
    margin: 0;
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-size: 1.5em;
    font-weight: bold;
}
.close {
    color: #fff;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}
.close:hover {
    transform: scale(1.2);
    color: #fbbf24;
}
.modal-body {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
}
.system-detail {
    line-height: 1.6;
}
.system-detail h3 {
    color: #2563eb;
    margin-bottom: 16px;
    font-size: 1.3em;
}
.system-detail .detail-section {
    margin-bottom: 20px;
}
.system-detail .detail-section h4 {
    color: #1e40af;
    margin-bottom: 8px;
    font-size: 1.1em;
}
.system-detail .detail-section p {
    color: #444;
    margin-bottom: 8px;
}
.system-detail .specs-list {
    list-style: none;
    padding: 0;
}
.system-detail .specs-list li {
    padding: 6px 0;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
}
.system-detail .specs-list li:last-child {
    border-bottom: none;
}
.system-detail .specs-list .spec-label {
    font-weight: 500;
    color: #374151;
}
.system-detail .specs-list .spec-value {
    color: #2563eb;
    font-weight: 500;
}

/* 使用教程区块 - 重新设计 */
.section-tutorial {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
    border-radius: 16px;
    margin: 20px 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    padding: 25px 20px;
    position: relative;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

/* 移除动画效果 */
/* @keyframes tutorialGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
} */

/* 移除装饰性背景元素 */
/* .section-tutorial::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: tutorialParticles 20s linear infinite;
    pointer-events: none;
} */

/* @keyframes tutorialParticles {
    0% { transform: translateY(0px) rotate(0deg); }
    100% { transform: translateY(-100px) rotate(360deg); }
} */

.section-tutorial .section-title {
    color: #1e293b;
    text-align: center;
    font-size: 1.8em;
    font-weight: bold;
    margin-bottom: 6px;
    text-shadow: none;
    position: relative;
    z-index: 2;
}

.section-subtitle {
    text-align: center;
    color: #64748b;
    font-size: 1.1em;
    margin-bottom: 40px;
    font-weight: 400;
    position: relative;
    z-index: 2;
}

.tutorial-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

/* 教程选择页面 - 改进设计 */
.tutorial-choice {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

.tutorial-option {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 24px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.tutorial-option::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: left 0.6s ease;
}

.tutorial-option:hover::before {
    left: 100%;
}

.tutorial-option:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    border-color: #cbd5e1;
}

.tutorial-option-icon {
    font-size: 2.5em;
    margin-bottom: 12px;
    transition: transform 0.3s ease;
}

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

.tutorial-option h3 {
    color: #1e293b;
    font-size: 1.3em;
    margin: 0 0 12px 0;
    font-weight: bold;
    transition: color 0.3s ease;
}

.tutorial-option:hover h3 {
    color: #475569;
}

.tutorial-option p {
    color: #64748b;
    margin: 0;
    line-height: 1.5;
    font-size: 0.95em;
    flex-grow: 1;
}

/* 教程内容页面 - 改进设计 */
.tutorial-self, .tutorial-service {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    margin-top: 16px;
    border: 1px solid #e2e8f0;
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tutorial-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    gap: 16px;
    border-bottom: 2px solid rgba(102, 126, 234, 0.1);
    padding-bottom: 16px;
}

.back-btn {
    background: linear-gradient(135deg, #64748b, #475569);
    border: none;
    border-radius: 25px;
    padding: 12px 20px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95em;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(100, 116, 139, 0.2);
}

.back-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.3);
}

.tutorial-header h3 {
    color: #1e293b;
    margin: 0;
    font-size: 1.3em;
    font-weight: bold;
}

.tutorial-content ol {
    padding-left: 25px;
    margin: 0;
}

.tutorial-content li {
    margin-bottom: 12px;
    font-size: 1em;
    line-height: 1.6;
    color: #374151;
    padding: 6px 0;
    border-left: 3px solid transparent;
    padding-left: 12px;
    transition: all 0.3s ease;
}

.tutorial-content li:hover {
    border-left-color: #64748b;
    background: rgba(100, 116, 139, 0.05);
    padding-left: 20px;
}

.tutorial-content strong {
    color: #475569;
    font-weight: 600;
}

.tutorial-content p {
    margin-top: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 12px;
    border-left: 4px solid #64748b;
    color: #334155;
    font-weight: 500;
}

/* 客服安装页面 - 改进设计 */
.tutorial-service-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.service-info h4, .service-contact h4 {
    color: #1e293b;
    margin: 0 0 15px 0;
    font-size: 1.2em;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-info h4::before {
    content: '';
    font-size: 1.1em;
}

.service-contact h4::before {
    content: '';
    font-size: 1.1em;
}

.service-info ul {
    margin: 0;
    padding-left: 25px;
}

.service-info li {
    margin-bottom: 10px;
    color: #475569;
    line-height: 1.6;
    position: relative;
}

.service-info li::before {
    content: '✓';
    color: #10b981;
    font-weight: bold;
    position: absolute;
    left: -20px;
}

.service-contact p {
    margin: 10px 0;
    color: #475569;
    line-height: 1.6;
}

.service-contact a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.service-contact a:hover {
    color: #5b21b6;
}

.service-contact .card-btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    margin-top: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.service-contact .card-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* 联系我们区块 */
.section-contact {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    padding: 30px 20px;
    text-align: center;
    color: #374151;
    border: 1px solid #e2e8f0;
}

.section-contact h2 {
    color: #1e293b;
    font-size: 1.8em;
    margin-bottom: 16px;
    font-weight: bold;
}

.section-contact p {
    color: #64748b;
    font-size: 1.05em;
    margin: 10px 0;
    transition: color 0.3s;
}

.section-contact p:hover {
    color: #475569;
}

.section-contact a {
    color: #3b82f6;
    text-decoration: none;
    transition: color 0.3s;
}

.section-contact a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* Footer样式 */
footer {
    text-align: center;
    color: #888;
    padding: 30px 0 10px 0;
    font-size: 0.95em;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
}

footer .footer-values {
    font-size: 0.98em;
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 10px;
}

footer .footer-disclaimer {
    max-width: 980px;
    margin: 0 auto 8px auto;
    line-height: 1.6;
    color: #6b7280;
    font-size: 0.92em;
    padding: 0 16px;
}

footer .footer-copy {
    color: #9ca3af;
    font-size: 0.9em;
    margin-top: 8px;
}

/* 关于我们浮动按钮样式 */
#aboutUsBtn {
    position: fixed;
    right: 28px;
    bottom: 80px;
    z-index: 999;
    min-width: 128px;
    height: 48px;
    border: none;
    border-radius: 24px;
    background: linear-gradient(90deg, #6a82fb 0%, #26d0ce 100%);
    box-shadow: 0 4px 16px rgba(106,130,251,0.18);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.08em;
    color: #fff;
    font-family: 'ZCOOL KuaiLe', '微软雅黑', cursive, sans-serif;
    font-weight: bold;
    letter-spacing: 1px;
    transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
    outline: none;
    padding: 0 24px;
}

#aboutUsBtn:hover {
    box-shadow: 0 8px 32px rgba(38,208,206,0.28);
    transform: scale(1.06);
    background: linear-gradient(90deg, #26d0ce 0%, #6a82fb 100%);
}

#aboutUsBtn svg {
    pointer-events: none;
}

/* 避免底部被固定按钮遮挡 */
.main {
    padding-bottom: 120px;
}

/* 移动端适配 - 重新设计 */
@media (max-width: 768px) {
    /* 导航栏移动端优化 */
    .navbar {
        padding: 0 16px;
        height: 56px;
        position: relative;
    }
    
    .navbar .logo {
        font-size: 1.6em;
        letter-spacing: 1px;
    }
    
    .navbar .logo .logo-cn {
        font-size: 0.45em;
        margin-left: 4px;
        letter-spacing: 0.5px;
    }
    
    /* 移动端菜单按钮优化 */
    .menu-toggle {
        display: flex;
        margin-left: auto;
    }
    
    .menu-toggle span {
        width: 24px;
        height: 3px;
        background: #2563eb;
        margin: 3px 0;
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    
    /* 移动端导航菜单优化 */
    #nav-menu {
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid #e5e7eb;
        display: block;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    
    #nav-menu.active {
        max-height: 240px;
    }
    
    #nav-menu a {
        padding: 16px 20px;
        margin: 0;
        border-top: 1px solid #f1f5f9;
        font-size: 1em;
        text-align: center;
        display: block;
    }
    
    #nav-menu a:hover {
        background: #f8fafc;
        transform: none;
    }
    
    /* 首页区块移动端优化 */
    .section-home {
        padding: 60px 20px 40px 20px;
        min-height: 70vh;
    }
    
    .main-title {
        font-size: 2em !important;
        letter-spacing: 2px !important;
        margin-bottom: 20px !important;
        line-height: 1.3 !important;
    }
    
    .section-home p {
        font-size: 1.1em !important;
        line-height: 1.6 !important;
        margin-bottom: 30px !important;
    }
    
    /* 隐藏装饰性气泡，提升性能 */
    .bubble {
        display: none !important;
    }
    
    /* 主要内容区域移动端优化 */
    .main {
        padding: 20px 16px 120px 16px;
    }
    
    /* 区块标题移动端优化 */
    .section-title {
        font-size: 1.8em !important;
        margin-bottom: 12px !important;
        letter-spacing: 1px !important;
    }
    
    .section-subtitle {
        font-size: 0.95em !important;
        margin-bottom: 24px !important;
        line-height: 1.5 !important;
    }
    
    /* 下载区块移动端优化 */
    .section-download {
        padding: 24px 16px !important;
        margin: 20px 0 !important;
        border-radius: 16px !important;
    }
    
    /* 下载卡片移动端优化 */
    .download-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .download-card {
        padding: 20px 16px !important;
        border-radius: 16px !important;
        box-shadow: 0 4px 16px rgba(37,99,235,0.08) !important;
    }
    
    .card-header {
        flex-direction: column !important;
        text-align: center !important;
        gap: 12px !important;
        margin-bottom: 16px !important;
    }
    
    .card-icon {
        font-size: 2.2em !important;
        width: 50px !important;
        height: 50px !important;
        border-radius: 12px !important;
    }
    
    .card-title h3 {
        font-size: 1.3em !important;
        margin-bottom: 4px !important;
    }
    
    .card-subtitle {
        font-size: 0.85em !important;
    }
    
    .card-content {
        margin-bottom: 20px !important;
    }
    
    .card-content p {
        font-size: 0.9em !important;
        line-height: 1.5 !important;
        margin-bottom: 12px !important;
    }
    
    .card-features {
        gap: 6px !important;
    }
    
    .feature-tag {
        font-size: 0.75em !important;
        padding: 3px 8px !important;
        border-radius: 8px !important;
    }
    
    .card-actions {
        flex-direction: column !important;
        gap: 10px !important;
    }
    
    .primary-btn, .secondary-btn {
        width: 100% !important;
        padding: 14px 16px !important;
        font-size: 0.95em !important;
        border-radius: 12px !important;
        min-height: 48px !important;
        justify-content: center !important;
        white-space: nowrap !important;
        text-align: center !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        box-sizing: border-box !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 8px !important;
    }
    
    /* 教程区块移动端优化 */
    .section-tutorial {
        padding: 20px 16px !important;
        margin: 16px 0 !important;
        border-radius: 16px !important;
    }
    
    .section-tutorial .section-title {
        font-size: 1.6em !important;
        margin-bottom: 8px !important;
    }
    
    .tutorial-choice {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
        margin-top: 12px !important;
    }
    
    .tutorial-option {
        padding: 20px 16px !important;
        min-height: 140px !important;
        border-radius: 14px !important;
    }
    
    .tutorial-option-icon {
        font-size: 2.2em !important;
        margin-bottom: 8px !important;
    }
    
    .tutorial-option h3 {
        font-size: 1.2em !important;
        margin-bottom: 8px !important;
    }
    
    .tutorial-option p {
        font-size: 0.9em !important;
        line-height: 1.4 !important;
    }
    
    /* 教程内容移动端优化 */
    .tutorial-self, .tutorial-service {
        padding: 16px !important;
        border-radius: 14px !important;
        margin-top: 12px !important;
    }
    
    .tutorial-header {
        margin-bottom: 12px !important;
        gap: 12px !important;
        padding-bottom: 12px !important;
    }
    
    .back-btn {
        padding: 10px 16px !important;
        font-size: 0.9em !important;
        border-radius: 20px !important;
    }
    
    .tutorial-header h3 {
        font-size: 1.2em !important;
    }
    
    .tutorial-content ol {
        padding-left: 20px !important;
    }
    
    .tutorial-content li {
        font-size: 0.95em !important;
        margin-bottom: 10px !important;
        line-height: 1.5 !important;
    }
    
    /* 客服区块移动端优化 */
    .tutorial-service-content {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .service-info h4, .service-contact h4 {
        font-size: 1.1em !important;
        margin-bottom: 12px !important;
    }
    
    .service-info ul {
        padding-left: 20px !important;
    }
    
    .service-info li {
        font-size: 0.9em !important;
        margin-bottom: 8px !important;
    }
    
    .service-contact p {
        font-size: 0.9em !important;
        margin: 8px 0 !important;
    }
    
    .service-contact .card-btn {
        padding: 12px 20px !important;
        font-size: 0.95em !important;
        border-radius: 20px !important;
        margin-top: 12px !important;
    }
    
    /* 联系我们区块移动端优化 */
    .section-contact {
        padding: 20px 16px !important;
        margin-bottom: 20px !important;
        border-radius: 16px !important;
    }
    
    .section-contact h2 {
        font-size: 1.6em !important;
        margin-bottom: 12px !important;
    }
    
    .section-contact p {
        font-size: 0.95em !important;
        margin: 8px 0 !important;
    }
    
    /* 弹窗移动端优化 */
    .modal-content {
        margin: 20px !important;
        max-width: calc(100vw - 40px) !important;
        max-height: calc(100vh - 40px) !important;
        border-radius: 16px !important;
    }
    
    .modal-header {
        padding: 16px 20px !important;
    }
    
    .modal-header h2 {
        font-size: 1.3em !important;
    }
    
    .close {
        font-size: 24px !important;
    }
    
    .modal-body {
        padding: 16px 20px !important;
        max-height: 50vh !important;
    }
    
    /* 浮动按钮移动端优化 */
    #aboutUsBtn, #donateBtn {
        right: 16px !important;
        min-width: 100px !important;
        height: 44px !important;
        font-size: 0.9em !important;
        padding: 0 16px !important;
        border-radius: 22px !important;
    }
    
    #aboutUsBtn {
        bottom: 120px !important;
    }
    
    #donateBtn {
        bottom: 64px !important;
    }
    
    #aboutUsBtn svg, #donateBtn svg {
        width: 18px !important;
        height: 18px !important;
        margin-right: 6px !important;
    }
    
    /* Footer移动端优化 */
    footer {
        padding: 20px 16px 10px 16px !important;
    }
    
    .footer-values {
        font-size: 0.85em !important;
        margin-bottom: 8px !important;
    }
    
    .footer-disclaimer {
        font-size: 0.8em !important;
        padding: 0 8px !important;
        line-height: 1.5 !important;
    }
    
    .footer-copy {
        font-size: 0.75em !important;
    }
}

/* 超小屏幕适配 */
@media (max-width: 480px) {
    .navbar {
        padding: 0 12px;
    }
    
    .navbar .logo {
        font-size: 1.4em;
    }
    
    .navbar .logo .logo-cn {
        font-size: 0.4em;
    }
    
    .main {
        padding: 16px 12px 100px 12px;
    }
    
    .section-home {
        padding: 50px 16px 30px 16px;
        min-height: 60vh;
    }
    
    .main-title {
        font-size: 1.8em !important;
        letter-spacing: 1px !important;
    }
    
    .section-home p {
        font-size: 1em !important;
    }
    
    .section-title {
        font-size: 1.5em !important;
    }
    
    .section-subtitle {
        font-size: 0.9em !important;
    }
    
    .download-card {
        padding: 16px 12px !important;
    }
    
    .card-icon {
        font-size: 2em !important;
        width: 45px !important;
        height: 45px !important;
    }
    
    .card-title h3 {
        font-size: 1.2em !important;
    }
    
    .primary-btn, .secondary-btn {
        padding: 12px 14px !important;
        font-size: 0.9em !important;
        min-height: 44px !important;
        white-space: nowrap !important;
        text-align: center !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        box-sizing: border-box !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 8px !important;
    }
    
    .tutorial-option {
        padding: 16px 12px !important;
        min-height: 120px !important;
    }
    
    .tutorial-option-icon {
        font-size: 2em !important;
    }
    
    .tutorial-option h3 {
        font-size: 1.1em !important;
    }
    
    .tutorial-option p {
        font-size: 0.85em !important;
    }
    
    #aboutUsBtn, #donateBtn {
        min-width: 90px !important;
        height: 40px !important;
        font-size: 0.85em !important;
        padding: 0 12px !important;
        right: 12px !important;
    }
    
    #aboutUsBtn svg, #donateBtn svg {
        width: 16px !important;
        height: 16px !important;
        margin-right: 4px !important;
    }
}

/* 横屏模式适配 */
@media (max-width: 768px) and (orientation: landscape) {
    .section-home {
        min-height: 50vh;
        padding: 40px 20px 30px 20px;
    }
    
    .main-title {
        font-size: 1.6em !important;
    }
    
    .section-home p {
        font-size: 1em !important;
    }
    
    .download-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }
    
    .tutorial-choice {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
    }
    
    .tutorial-option {
        min-height: 100px !important;
        padding: 16px 12px !important;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .navbar {
        padding: 0 24px;
    }
    
    .main {
        padding: 24px 20px;
    }
    
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .tutorial-choice {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .section-tutorial {
        padding: 24px 20px;
    }
    
    .section-contact {
        padding: 24px 20px;
    }
}

/* 触摸设备优化 - 去除hover效果，提升触摸体验 */
@media (hover: none) and (pointer: coarse) {
    .navbar nav a:hover {
        transform: none;
        color: #2563eb;
    }
    
    .download-card:hover {
        transform: none;
        box-shadow: 0 4px 20px rgba(37,99,235,0.08);
    }
    
    .tutorial-option:hover {
        transform: none;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }
    
    .primary-btn:hover, .secondary-btn:hover {
        transform: none;
    }
    
    .primary-btn:active, .secondary-btn:active {
        transform: scale(0.98);
    }
    
    #aboutUsBtn:hover, #donateBtn:hover {
        transform: none;
    }
    
    #aboutUsBtn:active, #donateBtn:active {
        transform: scale(0.95);
    }
    
    .card-btn:hover {
        transform: none;
    }
    
    .card-btn:active {
        transform: scale(0.98);
    }
    
    .back-btn:hover {
        transform: none;
    }
    
    .back-btn:active {
        transform: scale(0.95);
    }
}

/* 移动端性能优化 */
@media (max-width: 768px) {
    /* 减少动画复杂度 */
    .section-home {
        background-size: 200% 200% !important;
        animation: gradientShift 12s ease-in-out infinite !important;
    }
    
    /* 简化阴影效果 */
    .download-card {
        box-shadow: 0 2px 8px rgba(37,99,235,0.06) !important;
    }
    
    .tutorial-option {
        box-shadow: 0 2px 6px rgba(0,0,0,0.04) !important;
    }
    
    /* 优化字体渲染 */
    * {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    /* 减少重绘 */
    .navbar {
        will-change: auto;
    }
    
    /* 优化滚动性能 */
    .main {
        -webkit-overflow-scrolling: touch;
    }
}