/* 基础图标样式 */
.icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.icon-chart {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M3 13h8V3H3v10zm0 8h8v-6H3v6zm10 0h8V11h-8v10zm0-18v6h8V3h-8z'/%3E%3C/svg%3E");
}

.icon-shield {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4z'/%3E%3C/svg%3E");
}

.icon-bolt {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M7 2v11h3v9l7-12h-4l4-8z'/%3E%3C/svg%3E");
}

.icon-headset {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M12 1c-4.97 0-9 4.03-9 9v7c0 1.66 1.34 3 3 3h3v-8H5v-2c0-3.87 3.13-7 7-7s7 3.13 7 7v2h-4v8h3c1.66 0 3-1.34 3-3v-7c0-4.97-4.03-9-9-9z'/%3E%3C/svg%3E");
}

.icon-lock {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zm-6 9c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2zm3.1-9H8.9V6c0-1.71 1.39-3.1 3.1-3.1 1.71 0 3.1 1.39 3.1 3.1v2z'/%3E%3C/svg%3E");
}

.icon-user-shield {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232563eb'%3E%3Cpath d='M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4zm0 10.99h7c-.53 4.12-3.28 7.79-7 8.94V12H5V6.3l7-3.11v8.8z'/%3E%3C/svg%3E");
}

.icon-apple {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M18.71 19.5c-.83 1.24-1.71 2.45-3.05 2.47-1.34.03-1.77-.79-3.29-.79-1.53 0-2 .77-3.27.82-1.31.05-2.3-1.32-3.14-2.53C4.25 17 2.94 12.45 4.7 9.39c.87-1.52 2.43-2.48 4.12-2.51 1.28-.02 2.5.87 3.29.87.78 0 2.26-1.07 3.81-.91.65.03 2.47.26 3.64 1.98-.09.06-2.17 1.28-2.15 3.81.03 3.02 2.65 4.03 2.68 4.04-.03.07-.42 1.44-1.38 2.83M13 3.5c.73-.83 1.94-1.46 2.94-1.5.13 1.17-.34 2.35-1.04 3.19-.69.85-1.83 1.51-2.95 1.42-.15-1.15.41-2.35 1.05-3.11z'/%3E%3C/svg%3E");
}

.icon-android {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M17.6 9.48l1.84-3.18c.16-.31.04-.69-.26-.85-.29-.15-.65-.06-.83.22l-1.88 3.24c-2.86-1.21-6.08-1.21-8.94 0L5.65 5.67c-.19-.29-.58-.38-.87-.2-.28.18-.37.54-.22.83L6.4 9.48C3.3 11.25 1.28 14.44 1 18h22c-.28-3.56-2.3-6.75-5.4-8.52zM7 15.25c-.69 0-1.25-.56-1.25-1.25s.56-1.25 1.25-1.25 1.25.56 1.25 1.25-.56 1.25-1.25 1.25z'/%3E%3C/svg%3E");
}

.icon-wechat {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236b7280'%3E%3Cpath d='M8.5 13.5l-1.5 1.5 3 3 5-5-1.5-1.5-3.5 3.5-2-2zM12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8z'/%3E%3C/svg%3E");
}

.icon-weibo {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236b7280'%3E%3Cpath d='M10.5 15.5c0 .83-.67 1.5-1.5 1.5s-1.5-.67-1.5-1.5.67-1.5 1.5-1.5 1.5.67 1.5 1.5zM12 9c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4zm0 6.5c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5z'/%3E%3C/svg%3E");
}

.icon-telegram {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236b7280'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm4.64 6.8c-.15 1.58-.8 5.42-1.13 7.19-.14.75-.42 1-.68 1.03-.58.05-1.02-.38-1.58-.75-.88-.58-1.38-.94-2.23-1.5-.99-.65-.35-1.01.22-1.59.15-.15 2.71-2.48 2.76-2.69.01-.03.01-.14-.07-.2-.08-.06-.19-.04-.27-.02-.12.02-1.98 1.26-5.59 3.7-.53.36-1.01.53-1.44.52-.47-.01-1.38-.27-2.06-.49-.84-.28-1.51-.43-1.45-.91.03-.27.38-.55 1.05-.84 4.12-1.79 6.87-2.97 8.26-3.54 3.93-1.6 4.75-1.88 5.27-1.88.11 0 .36.03.52.18.14.15.18.33.2.52-.01.18-.01.47-.02.52z'/%3E%3C/svg%3E");
}

.icon-twitter {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236b7280'%3E%3Cpath d='M22.46 6c-.77.35-1.6.58-2.46.69.88-.53 1.56-1.37 1.88-2.38-.83.5-1.75.85-2.72 1.05C18.37 4.5 17.26 4 16 4c-2.35 0-4.27 1.92-4.27 4.29 0 .34.04.67.11.98C8.28 9.09 5.11 7.38 3 4.79c-.37.63-.58 1.37-.58 2.15 0 1.49.75 2.81 1.91 3.56-.71 0-1.37-.2-1.95-.5v.03c0 2.08 1.48 3.82 3.44 4.21a4.22 4.22 0 0 1-1.93.07 4.28 4.28 0 0 0 4 2.98 8.521 8.521 0 0 1-5.33 1.84c-.34 0-.68-.02-1.02-.06C3.44 20.29 5.7 21 8.12 21 16 21 20.33 14.46 20.33 8.79c0-.19 0-.37-.01-.56.84-.6 1.56-1.36 2.14-2.23z'/%3E%3C/svg%3E");
}

/* 全局样式 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --background-color: #ffffff;
    --background-light: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --header-height: 80px;
    --container-width: 1200px;
    --section-padding: 4rem;
    --card-padding: 2rem;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* 响应式断点 */
@media screen and (max-width: 1200px) {
    :root {
        --container-width: 100%;
        --section-padding: 3rem;
        --card-padding: 1.5rem;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --header-height: 60px;
        --section-padding: 2rem;
        --card-padding: 1.2rem;
        --border-radius: 8px;
    }
}

@media screen and (max-width: 576px) {
    :root {
        --header-height: 50px;
        --section-padding: 1.5rem;
        --card-padding: 1rem;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    color: inherit;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1rem;
}

/* 顶部导航栏 */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.slogan {
    font-size: 0.9rem;
    color: var(--text-light);
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    font-size: 1.2rem;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.login-btn,
.register-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

.login-btn {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.login-btn:hover {
    background: var(--primary-color);
    color: white;
}

.register-btn {
    background: var(--primary-color);
    color: white;
    border: none;
}

.register-btn:hover {
    background: var(--primary-dark);
}

/* 移动端导航按钮样式 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1000;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    transition: all 0.3s ease;
}

/* 移动端导航菜单样式 */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: white;
    padding: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-nav-link {
    display: block;
    padding: 1rem;
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 500;
    text-align: center;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background-color: var(--background-light);
    color: var(--primary-color);
}

/* 主横幅 */
.hero-section {
    padding: calc(var(--header-height) + 2rem) 0 var(--section-padding);
    background: #000000;
    color: white;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    text-align: left;
}

.hero-content {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero-image {
    flex: 1;
    max-width: 50%;
    display: flex;
    justify-content: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.cta-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    color: white;
    background-color: var(--primary-color);
    border: none;
    cursor: pointer;
}

.cta-btn:hover {
    background-color: var(--primary-dark);
}

/* 特色功能 */
.features-section {
    padding: var(--section-padding) 0;
    background: var(--background-color);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.feature-card {
    background: var(--background-color);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px var(--shadow-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 下载区域 */
.download-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.download-text {
    flex: 1;
    max-width: 600px;
}

.download-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.download-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    gap: 1rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.download-btn.ios {
    background: linear-gradient(135deg, #000000, #333333);
    color: white;
}

.download-btn.android {
    background: linear-gradient(135deg, #2BB673, #3DDC84);
    color: white;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* 安全保障 */
.security-section {
    padding: var(--section-padding) 0;
    background: var(--background-color);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.security-card {
    background: var(--background-color);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.security-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px var(--shadow-color);
}

.security-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
}

.security-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.security-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 底部区域 */
.main-footer {
    background: var(--background-light);
    padding: var(--section-padding) 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li button {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-section ul li button:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

/* 响应式设计 */
@media screen and (max-width: 1200px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media screen and (max-width: 992px) {
    .hero-content,
    .download-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .download-buttons {
        justify-content: center;
    }
}

@media screen and (max-width: 768px) {
    /* 导航栏响应式 */
    .header-wrapper {
        padding: 0 1rem;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .slogan {
        display: none;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(11px) rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-11px) rotate(-45deg);
    }

    .header-actions {
        display: flex;
        align-items: center;
    }
    
    /* 主横幅响应式 */
    .hero-section {
        padding: calc(var(--header-height) + 1rem) 1rem 2rem;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        padding: 0 1rem;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-image {
        max-width: 100%;
        margin-top: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }
    
    .cta-btn {
        width: 100%;
        padding: 1rem;
    }
    
    /* 特色功能响应式 */
    .features-section {
        padding: 2rem 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    /* 安全保障响应式 */
    .security-section {
        padding: 2rem 1rem;
    }
    
    .security-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .security-card {
        padding: 1.5rem;
    }
    
    /* 下载区域响应式 */
    .download-section {
        padding: 2rem 1rem;
    }
    
    .download-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .download-btn {
        width: 100%;
        padding: 1rem;
    }
}

@media screen and (max-width: 576px) {
    .main-header {
        height: 50px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .main-nav {
        top: 50px;
    }

    .nav-link {
        padding: 0.7rem;
        font-size: 0.95rem;
    }

    .section-nav {
        padding: 0.6rem 0.8rem;
    }

    .nav-items {
        gap: 0.6rem;
    }

    .nav-item {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* 小屏幕手机响应式 */
@media screen and (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
}

/* 广告区域样式 */
.ad-section {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

/* 底部区域 */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.footer-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links button {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-links button:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}