/* 全局样式 */
:root {
    --primary-color: #16a34a;
    --primary-dark: #15803d;
    --primary-light: #dcfce7;
    --secondary-color: #334155;
    --accent-color: #f43f5e;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 70px;
}

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

a:hover {
    color: var(--primary-dark);
}

.bg-primary-soft {
    background-color: var(--primary-light);
}

/* 导航栏 */
.navbar {
    padding: 0.75rem 0;
}

.navbar-brand {
    font-weight: 600;
}

.brand-text {
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--primary-color);
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    padding: 0.5rem 1rem;
    transition: var(--transition);
}

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

.language-selector .lang-btn {
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
}

.language-selector .lang-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 英文字体特别处理 */
html[lang="en"] body {
    font-family: 'Segoe UI', 'Arial', sans-serif;
}

/* 英文字体普遍需要更大的尺寸 */
html[lang="en"] .nav-link,
html[lang="en"] p {
    font-size: 1.05em;
}

/* 英文标题通常需要更多空间 */
html[lang="en"] h1, 
html[lang="en"] h2,
html[lang="en"] h3 {
    letter-spacing: -0.02em;
}

/* 英文按钮可能需要更多宽度 */
html[lang="en"] .btn {
    padding-left: 1.2em;
    padding-right: 1.2em;
}

/* Hero 部分 */
.hero-section {
    padding: 6rem 0 4rem;
    background-color: var(--bg-light);
}

.hero-image {
    overflow: hidden;
    border-radius: 8px;
}

.hero-image img {
    transition: transform 0.7s ease;
}

.hero-image:hover img {
    transform: scale(1.02);
}

/* 功能部分 */
.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.feature-card {
    transition: var(--transition);
    border-radius: 12px;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* 截图部分 */
.screenshot-card {
    transition: var(--transition);
}

.screenshot-card:hover img {
    box-shadow: var(--shadow-lg);
}

/* 价格部分 */
.pricing-card {
    transition: var(--transition);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

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

.pricing-card.popular {
    border-top: 4px solid var(--primary-color);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 1rem;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 0 0 0.5rem 0.5rem;
}

.pricing-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.pricing-value {
    margin: 1.5rem 0;
}

.pricing-currency {
    font-size: 1.25rem;
    font-weight: 500;
    vertical-align: top;
    margin-right: 0.25rem;
}

.pricing-amount {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.pricing-duration {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-features {
    margin-bottom: 1.5rem;
}

.pricing-features li {
    margin-bottom: 0.75rem;
}

/* CTA 部分 */
.cta-section {
    background-color: var(--primary-color);
}

/* 页脚 */
.footer {
    background-color: var(--secondary-color);
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer a:hover {
    color: white;
    text-decoration: none;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--primary-color);
}

.footer-brand {
    text-decoration: none;
}

/* 响应式调整 */
@media (max-width: 991.98px) {
    .hero-section {
        padding: 4rem 0 3rem;
    }
    
    .hero-image {
        margin-top: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 767.98px) {
    .pricing-card {
        margin-bottom: 1.5rem;
    }
    
    .hero-section {
        padding: 3rem 0 2rem;
    }
    
    .feature-card {
        margin-bottom: 1.5rem;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    body.dark-mode {
        background-color: #0f172a;
        color: #e2e8f0;
    }
    
    body.dark-mode .navbar,
    body.dark-mode .card {
        background-color: #1e293b;
        color: #e2e8f0;
    }
    
    body.dark-mode .bg-light {
        background-color: #1e293b !important;
    }
    
    body.dark-mode .text-dark {
        color: #e2e8f0 !important;
    }
    
    body.dark-mode .border-0 {
        border-color: #334155 !important;
    }
}

/* 自定义按钮 */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fadeIn {
    animation: fadeIn 0.5s ease forwards;
}