:root {
    /* 白天模式默认值 */
    --primary-color: #1E50FF;
    --secondary-color: #F0F7FF;
    --accent-color: #FF4D4F;
    --text-dark: #333333;
    --text-medium: #666666;
    --text-light: #FFFFFF;
    --bg-light: #FFFFFF;
    --bg-dark: #333333;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}


/* 模式切换过渡效果 */
body {
    transition: background-color 0.5s ease, color 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: linear-gradient(135deg, #1E50FF 0%, #0A2ECC 100%);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    height: 60px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-image {
    width: 40px;
    height: 40px;
}

.logo-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-size: 20px;
    font-weight: bold;
    color: white;
}

.logo-sub {
    font-size: 12px;
    color: rgba(255,255,255,0.8);
}

.navbar.scrolled .logo-main {
    color: var(--primary-color);
}

.navbar.scrolled .logo-sub {
    color: var(--text-dark);
}

.navbar.scrolled .logo-image img {
    filter: brightness(0) saturate(100%) invert(25%) sepia(98%) saturate(2593%) hue-rotate(220deg) brightness(97%) contrast(101%);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: white;
    font-size: 16px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar.scrolled .nav-links a {
    color: var(--text-dark);
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.navbar.scrolled .nav-links a:hover {
    color: var(--primary-color);
    background: rgba(30, 80, 255, 0.1);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 60%;
}

.navbar.scrolled .nav-links a::after {
    background: var(--primary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-button {
    display: none;
    font-size: 24px;
    color: white;
    cursor: pointer;
}

.navbar.scrolled .mobile-menu-button {
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 10px 0;
    }

    .nav-links a {
        color: var(--text-dark);
        display: block;
        padding: 12px;
    }

    .mobile-menu-button {
        display: block;
    }

    .navbar.scrolled .nav-links {
        top: 60px;
    }
}

/* Hero区域样式 */
.hero {
    height: 500px;
    background: linear-gradient(to bottom, #E8F3FF, #FFFFFF);
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 60px; /* 补偿固定导航栏 */
}

.hero h1 {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.hero h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    color: var(--text-medium);
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--text-light);
    font-size: 18px;
    font-weight: bold;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all 0.3s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(30, 80, 255, 0.3);
}

/* 系统概述样式 */
.section-features {
    padding: 60px 0;
    background-color: var(--secondary-color);
}

.section-title.center {
    text-align: center;
}

.section-title.center:after {
    left: 50%;
    transform: translateX(-50%);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-light);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

.feature-card i {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-medium);
}

/* 表单样式 */
.section-form {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-button {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: var(--border-radius);
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-button:hover {
    background-color: #0d3fd3;
}

/* 系统优势样式 */
.section-advantages {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.section-advantages .section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.section-advantages .section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-medium);
    margin-bottom: 50px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.advantage-card p {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 15px;
    font-weight: 500;
}

.advantage-details {
    list-style: none;
    margin-top: 15px;
    padding-left: 20px;
}

.advantage-details li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text-medium);
}

.advantage-details li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .advantage-card {
        padding: 25px;
    }
}

/* 投放平台样式 */
.section-delivery {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.delivery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.delivery-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    transition: transform 0.3s;
}

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

.delivery-item i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* 抖音特殊样式 */
.fa-tiktok {
    color: #000000;
}

/* 小红书特殊样式 */
.fa-book {
    color: #FF2442;
}

/* B站特殊样式 */
.fa-bilibili {
    color: #00A1D6;
}

.delivery-item span {
    font-size: 14px;
    color: var(--text-dark);
    font-weight: 500;
}

/* 响应式调整 */
@media (max-width: 900px) {
    .delivery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .delivery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 收费模式样式 */
.section-pricing {
    padding: 80px 0;
    background-color: var(--secondary-color);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background-color: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
}

.pricing-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.03);
}

.pricing-card.featured .pricing-button {
    background-color: #FF4D4F;
}

.pricing-card.featured .pricing-button:hover {
    background-color: #e04545;
}

.pricing-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.pricing-header {
    text-align: center;
    margin-bottom: 25px;
}

.pricing-header h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.price {
    font-size: 36px;
    font-weight: bold;
    color: var(--text-dark);
}

.price span {
    font-size: 16px;
    font-weight: normal;
    color: var(--text-medium);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-dark);
}

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

.pricing-button {
    display: block;
    text-align: center;
    background-color: var(--primary-color);
    color: white;
    padding: 12px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

.pricing-button:hover {
    background-color: #0d3fd3;
}

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

/* GEO对比样式 */
.section-comparison {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.comparison-grid {
    max-width: 800px;
    margin: 40px auto 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
}

.comparison-title {
    padding: 15px;
    text-align: center;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    border-bottom: 1px solid #eee;
}

.comparison-row.highlight {
    background-color: var(--secondary-color);
}

.comparison-item {
    padding: 15px;
    text-align: center;
}

.comparison-row div:first-child {
    font-weight: bold;
    background-color: #f8f9fa;
}

.comparison-row:nth-child(even) {
    background-color: #f8f9fa;
}

/* 案例展示样式 */
.section-cases {
    padding: 60px 0;
    background-color: var(--secondary-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.case-card {
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

.case-image {
    height: 200px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-bottom: 3px solid var(--accent-color);
}

.case-content {
    padding: 20px;
}

.case-content h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.case-content p {
    font-size: 14px;
    color: var(--text-medium);
}

/* 新版页脚样式 */
.site-footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 30px;
    font-size: 14px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #fff;
}

.footer-desc {
    color: rgba(255,255,255,0.7);
    margin-bottom: 20px;
    line-height: 1.6;
}

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

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    color: white;
}

.social-icon i {
    color: white;
}

.footer-nav h4,
.footer-contact h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

/* 页脚专属导航链接样式 */
.footer-nav .nav-links {
    list-style: none;
    padding-left: 0;
}

.footer-nav .nav-links li {
    margin-bottom: 12px;
}

.footer-nav .nav-links a {
    display: block;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.3s;
    padding: 5px 0;
}

.footer-nav .nav-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-contact address {
    font-style: normal;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: rgba(255,255,255,0.7);
}

.footer-contact i {
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.footer-copyright {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
    text-align: center;
}

.legal-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.legal-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}

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

.legal-links span {
    color: rgba(255,255,255,0.3);
}

/* 主题切换按钮样式 */
.theme-switcher {
    position: fixed;
    bottom: 160px; /* 调整位置避免重叠 */
    right: 20px;
    z-index: 999;
}

/* 更新悬浮按钮组位置 */
.float-buttons {
    bottom: 20px;
    right: 20px;
    gap: 10px; /* 缩小间距 */
}

#themeToggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

#themeToggle:hover {
    transform: scale(1.1);
}

#themeToggle i {
    position: absolute;
    transition: opacity 0.3s;
}

#themeToggle .fa-sun {
    opacity: var(--sun-opacity, 0);
}

#themeToggle .fa-moon {
    opacity: var(--moon-opacity, 1);
}

[data-theme="dark"] #themeToggle .fa-sun {
    opacity: 1;
}

[data-theme="dark"] #themeToggle .fa-moon {
    opacity: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .theme-switcher {
        bottom: 80px;
    }
    
    #themeToggle {
        width: 40px;
        height: 40px;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-brand,
    .footer-nav,
    .footer-contact {
        text-align: center;
    }
    
    .footer-social,
    .nav-links,
    .footer-contact address {
        justify-content: center;
    }
}

/* GEO对比样式 */
.section-comparison {
    padding: 80px 0;
    background-color: #f9fafc;
}

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

.comparison-section {
    margin-bottom: 60px;
}

.comparison-section-title {
    text-align: center;
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 40px;
    position: relative;
}

.comparison-section-title:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-color);
}

.comparison-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 50px;
}

.comparison-card {
    flex: 1;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.3s;
}

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

.comparison-card-header {
    padding: 25px;
    text-align: center;
    color: white;
    font-size: 20px;
}

.comparison-card-header.seo {
    background: linear-gradient(135deg, #4b6cb7 0%, #182848 100%);
}

.comparison-card-header.geo {
    background: linear-gradient(135deg, #1E50FF 0%, #0A2ECC 100%);
}

.comparison-card-header i {
    font-size: 36px;
    margin-bottom: 15px;
    display: block;
}

.comparison-features {
    padding: 25px;
    list-style: none;
}

.comparison-features li {
    margin-bottom: 15px;
    font-size: 16px;
    padding-left: 30px;
    position: relative;
}

.comparison-features i {
    position: absolute;
    left: 0;
    top: 3px;
    color: var(--primary-color);
    font-size: 18px;
}

.comparison-divider {
    display: flex;
    align-items: center;
}

.vs-circle {
    width: 60px;
    height: 60px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    box-shadow: 0 5px 15px rgba(255, 77, 79, 0.3);
}

.comparison-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.stat-item {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.stat-value {
    font-size: 42px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-medium);
    margin-bottom: 20px;
}

.stat-bar {
    height: 8px;
    background: #eee;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
}

.stat-progress {
    height: 100%;
}

.stat-progress.seo {
    background: linear-gradient(90deg, #4b6cb7 0%, #182848 100%);
}

.stat-progress.geo {
    background: linear-gradient(90deg, #1E50FF 0%, #0A2ECC 100%);
}

.comparison-table {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.table-row {
    display: flex;
    border-bottom: 1px solid #eee;
}

.table-row.header {
    background: var(--primary-color);
    color: white;
}

.table-row:last-child {
    border-bottom: none;
}

.table-cell {
    flex: 1;
    padding: 18px 20px;
    text-align: center;
}

.table-row.header .table-cell {
    font-weight: bold;
    font-size: 18px;
}

.table-row:nth-child(even) {
    background: #f9fafc;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .comparison-cards {
        flex-direction: column;
    }
    
    .comparison-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .comparison-section-title {
        font-size: 24px;
    }
    
    .comparison-card-header {
        padding: 20px;
    }
    
    .comparison-features {
        padding: 20px;
    }
    
    .table-cell {
        padding: 12px 15px;
        font-size: 14px;
    }
}

/* 支持平台样式 */
.section-platforms {
    padding: 80px 0;
    background-color: var(--secondary-color);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.platform-card {
    background-color: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
    text-align: center;
}

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

.platform-logo {
    width: 120px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    margin: 0 auto 15px;
    border-radius: 6px;
    color: white;
}

.platform-logo.deepseek {
    background-color: #1E50FF;
}

.platform-logo.doubao {
    background-color: #FF9500;
}

.platform-logo.zunyi {
    background-color: #00B578;
}

.platform-logo.yuanbao {
    background-color: #FF4D4F;
}

.platform-logo.wenxin {
    background-color: #8A2BE2;
}

.platform-stats {
    margin-top: 15px;
    font-size: 14px;
}

.platform-stats span {
    display: block;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.platform-stats i {
    margin-right: 5px;
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .platforms-grid {
        grid-template-columns: 1fr;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .platforms-grid {
        gap: 20px;
    }
}
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .footer-contact {
        flex-direction: column;
        gap: 10px;
    }
}

/* 响应式调整 */
@media (max-width: 900px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* 系统概述样式 */
.section-about {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.about-features {
    list-style: none;
    margin-top: 30px;
}

.about-features li {
    margin-bottom: 15px;
    padding-left: 35px;
    position: relative;
    font-size: 16px;
    color: var(--text-dark);
}

.about-features i {
    position: absolute;
    left: 0;
    top: 2px;
    color: var(--primary-color);
    font-size: 20px;
}

.about-image {
    flex: 1;
    text-align: center;
}

.image-placeholder {
    background: var(--secondary-color);
    border-radius: 12px;
    padding: 40px;
    color: var(--primary-color);
}

.image-placeholder i {
    font-size: 80px;
    margin-bottom: 20px;
}

.image-placeholder p {
    font-size: 18px;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
    }
    
    .about-image {
        margin-top: 40px;
    }
}

/* 悬浮按钮样式 */
.float-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    transition: all 0.3s;
}

/* 提交需求按钮 - 始终显示 */
.submit-button {
    background: #00B578;
    opacity: 1;
    visibility: visible;
}

.submit-button:hover {
    background: #009966;
}

/* 联系客服和返回顶部按钮 - 滚动显示 */
.service-button, .top-button {
    background: var(--primary-color);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.service-button {
    background: #FF4D4F;
}

.service-button:hover {
    background: #e04545;
}

.top-button:hover {
    background: #0d3fd3;
}

.float-button:hover {
    background: #0d3fd3;
    transform: translateY(-3px);
}

.submit-button {
    background: #00B578;
}

.submit-button:hover {
    background: #009966;
}

.service-button {
    background: #FF4D4F;
}

.service-button:hover {
    background: #e04545;
}

/* 客服二维码弹窗 */
.qrcode-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    max-width: 300px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
}

.qrcode-placeholder {
    background: #f5f5f5;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
}

.qrcode-placeholder i {
    font-size: 60px;
    color: #666;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* 移动端将改为汉堡菜单 */
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero h2 {
        font-size: 24px;
    }
    
    .hero p {
        font-size: 16px;
    }

    .float-buttons {
        right: 10px;
        bottom: 10px;
    }
    
    .float-button {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}