/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


/* 基础样式 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
    margin: 0;
    line-height: 1;
}

.tagline {
    font-size: 12px;
    color: #666;
    font-weight: 300;
    line-height: 1;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主要内容 */
main {
    margin-top: 0;
}

/* 移动端导航栏修复 */
@media (max-width: 768px) {
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
    }
    
    .nav-menu {
        position: fixed !important;
        top: 70px !important;
        left: 0 !important;
        right: 0 !important;
        background: white !important;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
        transform: translateY(-100%) !important;
        transition: transform 0.3s ease !important;
        z-index: 999 !important;
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
        width: 100% !important;
        height: auto !important;
        max-height: calc(100vh - 70px) !important;
        overflow-y: auto !important;
    }
    
    .nav-menu.active {
        transform: translateY(0) !important;
    }
    
    /* 确保桌面端导航在移动端隐藏 */
    .nav-menu ul {
        display: none !important;
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }
    
    .nav-menu.active ul {
        display: block !important;
    }
    
    .nav-menu li {
        border-bottom: 1px solid #e2e8f0;
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu a {
        display: block;
        padding: 15px 0;
        font-size: 16px;
        min-height: 44px;
        display: flex;
        align-items: center;
        touch-action: manipulation;
    }
    
    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
        position: relative;
        padding: 10px;
        min-width: 44px;
        min-height: 44px;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #017aff 0%, #0066cc 25%, #0052a3 50%, #003d7a 75%, #002952 100%);
    color: white;
    padding: 100px 0;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(1, 122, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 102, 204, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 82, 163, 0.15) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.03) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(255, 255, 255, 0.02) 50%, transparent 70%);
    animation: heroShimmer 6s ease-in-out infinite;
}

@keyframes heroGlow {
    0% {
        opacity: 0.8;
        transform: scale(1);
    }
    100% {
        opacity: 1;
        transform: scale(1.05);
    }
}

@keyframes heroShimmer {
    0%, 100% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
    min-height: 500px;
}

.hero-content {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 50%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
    position: relative;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #017aff, #0066cc, #0052a3);
    border-radius: 1px;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% {
        box-shadow: 0 0 5px rgba(1, 122, 255, 0.5);
    }
    100% {
        box-shadow: 0 0 20px rgba(1, 122, 255, 0.8), 0 0 30px rgba(0, 102, 204, 0.6);
    }
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
    color: #cbd5e1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}


.hero-image {
    text-align: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.hero-img {
    max-width: 100%;
    max-height: 500px;
    width: auto;
    height: auto;
    border-radius: 12px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.hero-img::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #017aff, #0066cc, #0052a3, #003d7a);
    border-radius: 14px;
    z-index: -1;
    animation: borderGlow 4s linear infinite;
}

@keyframes borderGlow {
    0% {
        background: linear-gradient(45deg, #017aff, #0066cc, #0052a3, #003d7a);
    }
    25% {
        background: linear-gradient(45deg, #0066cc, #0052a3, #003d7a, #017aff);
    }
    50% {
        background: linear-gradient(45deg, #0052a3, #003d7a, #017aff, #0066cc);
    }
    75% {
        background: linear-gradient(45deg, #003d7a, #017aff, #0066cc, #0052a3);
    }
    100% {
        background: linear-gradient(45deg, #017aff, #0066cc, #0052a3, #003d7a);
    }
}

.hero-image::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(1, 122, 255, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    animation: pulseGlow 3s ease-in-out infinite;
    z-index: 1;
}

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

/* 功能特色 */
.features {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(1, 122, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(0, 102, 204, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.tab-btn {
    padding: 12px 24px;
    border: 2px solid #e2e8f0;
    background: white;
    color: #64748b;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(1, 122, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.tab-btn.active,
.tab-btn:hover {
    border-color: #017aff;
    background: linear-gradient(135deg, #017aff, #0066cc);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(1, 122, 255, 0.3);
}

.category-content {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
    border: 1px solid rgba(1, 122, 255, 0.1);
    backdrop-filter: blur(10px);
}

.category-panel {
    display: none;
}

.category-panel.active {
    display: block;
}

.category-panel h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.category-panel p {
    color: #64748b;
    margin-bottom: 30px;
    line-height: 1.6;
}

.size-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.size-item {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    padding: 12px 20px;
    border-radius: 12px;
    text-align: center;
    font-weight: 500;
    color: #475569;
    transition: all 0.3s ease;
    border: 1px solid rgba(1, 122, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.size-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(1, 122, 255, 0.1), transparent);
    transition: left 0.5s;
}

.size-item:hover::before {
    left: 100%;
}

.size-item:hover {
    background: linear-gradient(135deg, #017aff, #0066cc);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(1, 122, 255, 0.3);
    border-color: #017aff;
}

/* 功能亮点 */
.features-highlight {
    margin-top: 80px;
    padding-top: 80px;
    border-top: 1px solid #e2e8f0;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.highlight-card {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

.highlight-card:hover {
    transform: translateY(-5px);
}

.highlight-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.highlight-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.highlight-card p {
    color: #64748b;
    line-height: 1.6;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1e293b;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #64748b;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    margin-bottom: 20px;
}

.feature-icon img {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    object-fit: cover;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* 制作流程 */
.process {
    padding: 100px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 50%, #f1f5f9 100%);
    position: relative;
    overflow: hidden;
}

.process::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(1, 122, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 102, 204, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 60px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.step {
    text-align: center;
    position: relative;
    flex: 1;
    min-width: 150px;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
}

.step-number {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #017aff, #0066cc);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
    box-shadow: 0 6px 25px rgba(1, 122, 255, 0.3);
    position: relative;
    transition: all 0.3s ease;
}

.step-number::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, #017aff, #0066cc, #0052a3);
    border-radius: 50%;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.step:hover .step-number::before {
    opacity: 1;
}

.step:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(1, 122, 255, 0.4);
}

.step-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1e293b;
}

.step-content p {
    color: #64748b;
    font-size: 14px;
    line-height: 1.5;
}

/* 适用场景 */
.scenarios {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.scenarios::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(1, 122, 255, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(0, 102, 204, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 60px;
    position: relative;
    z-index: 2;
}

.scenario-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(1, 122, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(1, 122, 255, 0.02), rgba(0, 102, 204, 0.02));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(1, 122, 255, 0.15);
    border-color: rgba(1, 122, 255, 0.2);
}

.scenario-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.scenario-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.scenario-card p {
    color: #64748b;
    line-height: 1.6;
}



/* 公司介绍 */
.about {
    padding: 100px 0;
    background: #f8fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-top: 60px;
    align-items: start;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1e293b;
}

.about-text h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 30px 0 15px 0;
    color: #2563eb;
}

.about-text p {
    color: #64748b;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-info {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.info-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.info-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.info-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1e293b;
}

.info-item p {
    color: #64748b;
    font-size: 14px;
}

/* 常见问题 */
.faq {
    padding: 100px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 50%, #f1f5f9 100%);
    position: relative;
    overflow: hidden;
}

.faq::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 80%, rgba(1, 122, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 90% 20%, rgba(0, 102, 204, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    margin-top: 60px;
    position: relative;
    z-index: 2;
}

.faq-item {
    background: white;
    padding: 30px;
    border-radius: 16px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(1, 122, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.faq-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(1, 122, 255, 0.02), rgba(0, 102, 204, 0.02));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.faq-item:hover::before {
    opacity: 1;
}

.faq-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(1, 122, 255, 0.12);
    border-color: rgba(1, 122, 255, 0.2);
}

.faq-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.faq-item p {
    color: #64748b;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(1, 122, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 102, 204, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
    position: relative;
    z-index: 2;
}

.contact-item {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(1, 122, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(1, 122, 255, 0.02), rgba(0, 102, 204, 0.02));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.contact-item:hover::before {
    opacity: 1;
}

.contact-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(1, 122, 255, 0.15);
    border-color: rgba(1, 122, 255, 0.2);
}

.contact-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
    position: relative;
    z-index: 2;
}

.contact-item p {
    font-size: 18px;
    color: #017aff;
    font-weight: 500;
    position: relative;
    z-index: 2;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    color: white;
    padding: 60px 0 20px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(1, 122, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 102, 204, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
    position: relative;
    z-index: 2;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.footer-brand-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 5px;
    color: #2563eb;
}

.footer-brand-text p {
    color: #94a3b8;
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-about {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid #334155;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #e2e8f0;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: #94a3b8;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.footer-column a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #017aff;
    transition: width 0.3s ease;
}

.footer-column a:hover {
    color: #017aff;
    transform: translateX(3px);
}

.footer-column a:hover::before {
    width: 100%;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
}

.footer-legal {
    text-align: center;
    color: #94a3b8;
}

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

.footer-legal a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: #2563eb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端菜单显示 */
    .nav-menu {
        display: block !important;
    }
    
    .logo-img {
        height: 35px;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .tagline {
        font-size: 11px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
        min-height: auto;
    }
    
    .hero-content {
        height: auto;
        justify-content: flex-start;
    }
    
    .hero-image {
        height: auto;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .category-tabs {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .tab-btn {
        width: 200px;
    }
    
    .highlight-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 30px;
    }
    
    .step {
        flex: none;
        min-width: auto;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-info {
        padding: 30px;
    }
    
    .faq-item {
        padding: 20px;
    }
    
    
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-logo {
        justify-content: center;
        text-align: center;
    }
    
    .footer-logo-img {
        height: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-about {
        margin-top: 30px;
        padding-top: 30px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0 60px 0;
        margin-top: 70px;
    }
    
    .hero-img {
        max-height: 300px;
    }
    
    
    .features,
    .gallery,
    .download,
    .contact {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    
    .hero-img {
        max-height: 350px;
    }
    
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

/* 移动端触摸优化 */
@media (max-width: 768px) {
    .btn {
        min-height: 44px;
        min-width: 44px;
        touch-action: manipulation;
    }
    
    .nav-menu a {
        min-height: 44px;
        display: flex;
        align-items: center;
        touch-action: manipulation;
    }
    
    .gallery-item {
        touch-action: manipulation;
    }
    
    .feature-card {
        touch-action: manipulation;
    }
}

/* 防止双击缩放 */
* {
    touch-action: manipulation;
}

/* 优化滚动性能 */
.gallery-grid,
.features-grid {
    will-change: transform;
}

/* 硬件加速 */
.feature-card,
.gallery-item,
.btn {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.gallery-item,
.contact-item {
    animation: fadeInUp 0.6s ease-out;
}

/* 悬停效果增强 */
.feature-card:hover .feature-icon img {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}

/* 图片加载状态 */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 0;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* 增强的动画效果 */
.feature-card {
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card.animate {
    transform: translateY(0);
    opacity: 1;
}

.gallery-item {
    transform: scale(0.9);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item.animate {
    transform: scale(1);
    opacity: 1;
}

/* 滚动指示器 */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(37, 99, 235, 0.2);
    z-index: 1001;
}

.scroll-progress {
    height: 100%;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    width: 0%;
    transition: width 0.1s ease;
}

/* 按钮悬停效果 */
.btn {
    position: relative;
    overflow: hidden;
}

.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%;
}

/* 错误状态和加载状态 */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    color: #64748b;
}

.error-state img {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* 无障碍访问优化 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 焦点状态优化 */
.btn:focus,
.nav-menu a:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(1, 122, 255, 0.3);
    border-radius: 4px;
    transition: box-shadow 0.2s ease;
}

.nav-menu a:focus {
    background-color: rgba(1, 122, 255, 0.1);
    color: #017aff;
    transform: translateY(-1px);
}

.mobile-menu-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(1, 122, 255, 0.3);
    border-radius: 4px;
    background-color: rgba(1, 122, 255, 0.1);
}

/* 其他可点击元素的焦点状态 */
.tab-btn:focus,
.size-item:focus,
.scenario-card:focus,
.faq-item:focus,
.contact-item:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(1, 122, 255, 0.3);
    transform: translateY(-2px);
}

.footer-column a:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(1, 122, 255, 0.3);
    border-radius: 4px;
    background-color: rgba(1, 122, 255, 0.1);
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .hero {
        background: #000;
        color: #fff;
    }
    
    .btn-primary {
        background: #000;
        color: #fff;
        border: 2px solid #fff;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #ffffff;
        --card-bg: #2a2a2a;
    }
    
    body {
        background-color: var(--bg-color);
        color: var(--text-color);
    }
    
    .header {
        background: var(--card-bg);
    }
    
    .feature-card,
    .contact-item {
        background: var(--card-bg);
    }
    
    .features {
        background: var(--bg-color);
    }
    
    .gallery {
        background: var(--bg-color);
    }
}