/* CSS变量定义 - 浅色主题 */
:root {
    --primary-color: #000000;
    --secondary-color: #ffffff;
    --accent-color: #333333;
    --text-primary: #000000;
    --text-secondary: #555555;
    --background-primary: #ffffff;
    --background-secondary: #fafbfc;
    --border-color: transparent;
    --shadow-light: rgba(0, 0, 0, 0.04);
    --shadow-medium: rgba(0, 0, 0, 0.06);
    --gradient-primary: linear-gradient(135deg, #000000 0%, #333333 100%);
    --card-background: #ffffff;
    --hover-shadow: rgba(0, 0, 0, 0.12);
}

/* 深色主题变量 */
[data-theme="dark"] {
    --primary-color: #ffffff;
    --secondary-color: #000000;
    --accent-color: #cccccc;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --background-primary: #000000;
    --background-secondary: #0a0a0a;
    --border-color: transparent;
    --shadow-light: rgba(255, 255, 255, 0.04);
    --shadow-medium: rgba(255, 255, 255, 0.06);
    --gradient-primary: linear-gradient(135deg, #ffffff 0%, #cccccc 100%);
    --card-background: #111111;
    --hover-shadow: rgba(255, 255, 255, 0.12);
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    transition: all 0.3s ease;
    font-weight: 400;
    letter-spacing: 0.01em;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: none;
    z-index: 1000;
    transition: all 0.3s ease;
}

[data-theme="dark"] .navbar {
    background-color: rgba(0, 0, 0, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--text-primary);
    gap: 12px;
}

.nav-logo img {
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.nav-logo:hover img {
    transform: scale(1.05);
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--background-secondary);
    transform: scale(1.1);
}

/* 按钮样式 */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--secondary-color);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 1px 4px var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--hover-shadow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background-color: var(--text-primary);
    color: var(--background-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--hover-shadow);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* 英雄区域样式 */
.hero {
    padding: 120px 0 80px;
    background: var(--background-primary);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-content h2 {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.software-screenshot {
    width: 100%;
    max-width: 500px;
    height: auto;
    background: var(--card-background);
    border: none;
    border-radius: 12px;
    padding: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px var(--shadow-light);
}

.software-screenshot:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px var(--hover-shadow);
}

.software-screenshot img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

/* 支持的应用区域样式 */
.supported-apps {
    padding: 60px 0;
    background: var(--background-secondary);
}

.supported-apps h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.app-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    background: var(--card-background);
    border-radius: 12px;
    border: none;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 1px 4px var(--shadow-light);
}

.app-icon:hover {
    transform: translateY(-8px);
    box-shadow: 0 6px 20px var(--hover-shadow);
}

.app-icon i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.app-icon span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 特定应用图标颜色 - 改为黑白配色 */
.app-icon:nth-child(1) i { color: var(--text-primary); } /* WhatsApp */
.app-icon:nth-child(2) i { color: var(--text-primary); } /* Telegram */
.app-icon:nth-child(3) i { color: var(--text-primary); } /* Messenger */
.app-icon:nth-child(4) i { color: var(--text-primary); } /* 微信 */
.app-icon:nth-child(5) i { color: var(--text-primary); } /* QQ */
.app-icon:nth-child(6) i { color: var(--text-primary); } /* Line */

/* 功能区域样式 */
.features {
    padding: 80px 0;
    background: var(--background-primary);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-background);
    padding: 40px 30px;
    border-radius: 12px;
    border: none;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 1px 4px var(--shadow-light);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--hover-shadow);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 2rem;
    color: var(--secondary-color);
}

/* 功能图标样式 */
.feature-icon {
    font-size: 48px;
    color: #007bff;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    color: #0056b3;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 应用场景样式 */
.scenarios {
    padding: 80px 0;
    background: var(--background-primary);
}

.scenarios h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.scenario-card {
    background: var(--card-background);
    padding: 40px 30px;
    border-radius: 12px;
    border: none;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 3px 12px var(--shadow-light);
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--hover-shadow);
}

.scenario-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.scenario-icon i {
    font-size: 2rem;
    color: var(--secondary-color);
}

/* 场景图标样式 */
.scenario-icon {
    font-size: 48px;
    color: #28a745;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.scenario-card:hover .scenario-icon {
    transform: scale(1.1);
    color: #1e7e34;
}

.scenario-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.scenario-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 配置要求样式 */
.requirements {
    padding: 80px 0;
    background: var(--background-secondary);
}

.requirements h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

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

.requirement-card {
    background: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 1px 4px var(--shadow-light);
}

.requirement-card.recommended {
    border: none;
    position: relative;
    box-shadow: 0 4px 16px var(--hover-shadow);
}

.requirement-card.recommended::before {
    content: "推荐";
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--secondary-color);
    padding: 8px 20px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 6px var(--shadow-medium);
}

.requirement-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--hover-shadow);
}

.requirement-card h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.requirement-card ul {
    list-style: none;
}

.requirement-card li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: none;
    position: relative;
    padding-left: 20px;
}

.requirement-card li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.requirement-card li:last-child {
    border-bottom: none;
}

.requirement-card strong {
    color: var(--text-primary);
}

/* 联系购买区域样式 */
.contact {
    padding: 80px 0;
    background: var(--background-primary);
}

.purchase-section-full {
    text-align: center;
}

.purchase-section-full h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.pricing-plans {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    border: none;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 1px 4px var(--shadow-light);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px var(--hover-shadow);
}

.pricing-card.recommended {
    border: none;
    position: relative;
    transform: scale(1.05);
    box-shadow: 0 6px 20px var(--hover-shadow);
}

.pricing-card.recommended::before {
    content: "推荐";
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--secondary-color);
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.price {
    margin-bottom: 30px;
}

.currency {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.period {
    font-size: 1rem;
    color: var(--text-secondary);
}

.features-list {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.features-list li {
    padding: 8px 0;
    color: var(--text-secondary);
}

.features-list li:nth-child(-n+4) {
    color: var(--text-primary);
}

.features-list li:contains("✗") {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* 页脚样式 */
.footer {
    background: var(--background-secondary);
    padding: 40px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 14px;
}

.footer-contact .contact-item i {
    color: var(--text-primary);
    font-size: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
}

.footer-logo-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: 10px;
}

.footer-logo i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        justify-content: center;
    }
    
    .features-grid,
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-plans {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pricing-card.recommended {
        transform: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .feature-icon {
        width: 70px;
        height: 70px;
    }
    
    .feature-icon {
        font-size: 36px;
        margin-bottom: 15px;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scenario-card {
        padding: 30px 20px;
    }
    
    .scenario-icon {
        font-size: 36px;
        margin-bottom: 10px;
    }
    
    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        max-width: 400px;
    }
    
    .app-icon {
        padding: 15px 10px;
    }
    
    .app-icon i {
        font-size: 2rem;
        margin-bottom: 8px;
    }
    
    .app-icon span {
        font-size: 0.8rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

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

/* 全局标题字体优化 */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
}

h1 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 段落和文本优化 */
p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    margin-bottom: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* 按钮文字优化 */
.btn {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* 卡片内容文字优化 */
.feature-card p,
.scenario-card p,
.requirement-card p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* Hero区域标题和logo样式 */
.hero-title {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.hero-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

/* 紧凑价格选项样式 */
.pricing-options-compact {
    margin-bottom: 20px;
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.price-compact {
    display: flex;
    align-items: baseline;
    gap: 5px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--card-bg);
    font-size: 0.9rem;
}

.price-compact .amount {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
}

.price-compact .currency {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.price-compact .period {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 定制版价格样式优化 */
.pricing-card .price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.pricing-card .price .amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.pricing-card .price .currency {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.pricing-card .price .period {
    font-size: 1rem;
    color: var(--text-secondary);
}

.features-list {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.features-list li {
    padding: 8px 0;
    color: var(--text-secondary);
}

.features-list li:nth-child(-n+4) {
    color: var(--text-primary);
}

.features-list li:contains("✗") {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* 页脚样式 */
.footer {
    background: var(--background-secondary);
    padding: 40px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 14px;
}

.footer-contact .contact-item i {
    color: var(--text-primary);
    font-size: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
}

.footer-logo-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: 10px;
}

.footer-logo i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        justify-content: center;
    }
    
    .features-grid,
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-plans {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pricing-card.recommended {
        transform: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .feature-icon {
        width: 70px;
        height: 70px;
    }
    
    .feature-icon {
        font-size: 36px;
        margin-bottom: 15px;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scenario-card {
        padding: 30px 20px;
    }
    
    .scenario-icon {
        font-size: 36px;
        margin-bottom: 10px;
    }
    
    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        max-width: 400px;
    }
    
    .app-icon {
        padding: 15px 10px;
    }
    
    .app-icon i {
        font-size: 2rem;
        margin-bottom: 8px;
    }
    
    .app-icon span {
        font-size: 0.8rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

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

/* 全局标题字体优化 */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
}

h1 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 段落和文本优化 */
p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    margin-bottom: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* 按钮文字优化 */
.btn {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* 卡片内容文字优化 */
.feature-card p,
.scenario-card p,
.requirement-card p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* Hero区域标题和logo样式 */
.hero-title {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.hero-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

/* 悬浮客服图标样式 */
.floating-customer-service {
    position: fixed;
    bottom: 50px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #0088cc, #229ed9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.floating-customer-service:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 136, 204, 0.4);
    background: linear-gradient(135deg, #229ed9, #0088cc);
}

.floating-customer-service i {
    font-size: 30px;
    color: white;
}

/* 响应式设计 - 移动端调整 */
@media (max-width: 768px) {
    .floating-customer-service {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
    
    .floating-customer-service i {
        font-size: 30px;
    }
    
    .footer-content {
    flex-direction: column;
    gap: 20px;
}
}



/* 语言切换按钮样式 */
.language-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    margin-right: 10px;
}

.language-toggle:hover {
    background: var(--card-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.language-toggle i {
    font-size: 14px;
}

.language-toggle span {
    font-weight: 500;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 14px;
}

.footer-contact .contact-item i {
    color: var(--text-primary);
    font-size: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
}

.footer-logo-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: 10px;
}

.footer-logo i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        justify-content: center;
    }
    
    .features-grid,
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-plans {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pricing-card.recommended {
        transform: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .feature-icon {
        width: 70px;
        height: 70px;
    }
    
    .feature-icon {
        font-size: 36px;
        margin-bottom: 15px;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scenario-card {
        padding: 30px 20px;
    }
    
    .scenario-icon {
        font-size: 36px;
        margin-bottom: 10px;
    }
    
    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        max-width: 400px;
    }
    
    .app-icon {
        padding: 15px 10px;
    }
    
    .app-icon i {
        font-size: 2rem;
        margin-bottom: 8px;
    }
    
    .app-icon span {
        font-size: 0.8rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

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

/* 全局标题字体优化 */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
}

h1 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 段落和文本优化 */
p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    margin-bottom: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* 按钮文字优化 */
.btn {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* 卡片内容文字优化 */
.feature-card p,
.scenario-card p,
.requirement-card p {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* Hero区域标题和logo样式 */
.hero-title {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.hero-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
}