/* Gate下载网站样式表 - 专业加密货币交易平台 */

/* CSS变量定义 */
:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4a9eff;
    --secondary-color: #00d4aa;
    --accent-color: #ff6b35;
    --bg-dark: #0d1117;
    --bg-light: #161b22;
    --bg-card: #21262d;
    --text-primary: #ffffff;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --gradient-primary: linear-gradient(135deg, #1a73e8 0%, #00d4aa 100%);
    --gradient-hero: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #1a73e8 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 头部样式 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(13, 17, 23, 0.98);
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    animation: fadeInLeft 0.6s ease;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    color: white;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航栏 */
.nav {
    display: flex;
    align-items: center;
    gap: 30px;
    animation: fadeInDown 0.6s ease;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: var(--transition-fast);
}

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

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

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

.nav-cta {
    background: var(--gradient-primary);
    color: white;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    background: none;
    border: none;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231a73e8' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    animation: fadeInLeft 0.8s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(26, 115, 232, 0.2);
    border: 1px solid rgba(26, 115, 232, 0.3);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #e0e0e0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hero-feature-icon {
    color: var(--secondary-color);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gradient-primary);
    color: white;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    color: var(--text-primary);
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(26, 115, 232, 0.1);
}

.hero-image {
    animation: fadeInRight 0.8s ease;
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-md);
    animation: float 3s ease-in-out infinite;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 5px;
}

/* 核心特性区域 */
.features {
    padding: 100px 0;
    background: var(--bg-dark);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
    animation: fadeInUp 0.6s ease;
}

.section-badge {
    display: inline-block;
    background: rgba(26, 115, 232, 0.15);
    color: var(--primary-light);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 15px;
    border: 1px solid rgba(26, 115, 232, 0.2);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 35px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(26, 115, 232, 0.3);
    box-shadow: var(--shadow-lg);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: rgba(26, 115, 232, 0.15);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 28px;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    transform: scale(1.1);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-text {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 服务介绍区域 */
.services {
    padding: 100px 0;
    background: var(--bg-light);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.service-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.service-card:hover .service-image img {
    transform: scale(1.1);
}

.service-content {
    padding: 30px;
}

.service-tag {
    display: inline-block;
    background: rgba(0, 212, 170, 0.15);
    color: var(--secondary-color);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.service-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.service-link:hover {
    gap: 12px;
    color: var(--primary-color);
}

/* 详细信息区域 */
.details {
    padding: 100px 0;
    background: var(--bg-dark);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.details-content {
    animation: fadeInLeft 0.6s ease;
}

.details-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 107, 53, 0.15);
    color: var(--accent-color);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.details-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.3;
}

.details-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

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

.details-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.details-list li:last-child {
    border-bottom: none;
}

.list-icon {
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 12px;
    color: white;
}

.list-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.list-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.details-image {
    animation: fadeInRight 0.6s ease;
}

.details-image-wrapper {
    position: relative;
}

.details-image-wrapper img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.details-card {
    position: absolute;
    bottom: -30px;
    left: -30px;
    background: var(--bg-card);
    padding: 25px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    min-width: 250px;
}

.details-card-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 15px;
}

.details-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.details-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 统计数据区域 */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-dark) 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stats-card {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease;
}

.stats-card:hover {
    transform: translateY(-5px);
    border-color: rgba(26, 115, 232, 0.3);
    box-shadow: var(--shadow-md);
}

.stats-icon {
    width: 60px;
    height: 60px;
    background: rgba(26, 115, 232, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

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

/* 常见问题区域 */
.faq {
    padding: 100px 0;
    background: var(--bg-dark);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 25px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease;
}

.faq-item:hover {
    border-color: rgba(26, 115, 232, 0.3);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.faq-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
    color: white;
}

.faq-question h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.7;
    padding-left: 47px;
}

/* 行动号召区域 */
.cta {
    padding: 100px 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.6s ease;
}

.cta-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.cta-text {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: white;
    color: var(--primary-color);
    padding: 18px 40px;
    font-size: 1.1rem;
}

.cta .btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-3px);
}

.cta .btn-secondary {
    border-color: white;
    color: white;
    padding: 18px 40px;
    font-size: 1.1rem;
}

.cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* 页脚 */
.footer {
    background: var(--bg-light);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    margin-bottom: 20px;
}

.footer-description {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

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

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .details-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .details-image {
        order: -1;
    }

    .details-card {
        position: relative;
        bottom: auto;
        left: auto;
        margin-top: 20px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px;
        border-top: 1px solid var(--border-color);
        gap: 15px;
    }

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

    .nav-cta {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding-top: 100px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stat-item {
        padding: 15px;
    }

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

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

    .features-grid {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: 15px;
    }
}

/* 辅助类 */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-20 {
    margin-top: 20px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}