/* ========== 深色科技风主题 ========== */
/* 覆盖默认变量和样式 */

:root {
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --secondary: #a855f7;
    --dark: #0f172a;
    --gray: #94a3b8;
    --light-gray: #1e293b;
    --white: #0f172a;
    --gradient: linear-gradient(135deg, #00d4ff, #a855f7);
    --card-bg: rgba(30, 41, 59, 0.8);
    --border-color: rgba(148, 163, 184, 0.2);
    --glow-primary: rgba(0, 212, 255, 0.3);
    --glow-secondary: rgba(168, 85, 247, 0.3);
}

body {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: #e2e8f0;
}

/* 导航栏 - 玻璃质感 */
.navbar {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    color: #f1f5f9;
}

.nav-links a {
    color: #94a3b8;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    text-shadow: 0 0 10px var(--glow-primary);
}

/* 汉堡菜单按钮 - 浅色横线 */
.menu-toggle span {
    background: #f1f5f9;
}

/* 移动端菜单样式 */
@media (max-width: 768px) {
    .navbar .nav-links {
        background: rgba(15, 23, 42, 0.98);
        border-top: 1px solid var(--border-color);
    }
    
    .navbar .nav-links a {
        color: #e2e8f0 !important;
        border-bottom: 1px solid var(--border-color);
    }
    
    .navbar .nav-links a:hover,
    .navbar .nav-links a.active {
        color: var(--primary) !important;
    }
}

/* 按钮 - 霓虹光效 */
.btn-primary {
    background: var(--gradient);
    box-shadow: 0 0 20px var(--glow-primary);
}

.btn-primary:hover {
    box-shadow: 0 0 30px var(--glow-primary), 0 0 60px var(--glow-secondary);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #0f172a;
    box-shadow: 0 0 20px var(--glow-primary);
}

/* Hero 区域 */
.hero {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, var(--glow-primary) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, var(--glow-secondary) 0%, transparent 50%);
    pointer-events: none;
}

.hero-title {
    color: #f1f5f9;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
}

.hero-subtitle {
    color: #94a3b8;
}

.stat-number {
    color: var(--primary);
    text-shadow: 0 0 10px var(--glow-primary);
}

/* 功能卡片 - 玻璃态 */
.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: 0 0 30px var(--glow-primary);
    transform: translateY(-8px);
}

.feature-card h3 {
    color: #f1f5f9;
}

.feature-card p {
    color: #94a3b8;
}

/* 步骤区域 */
.how-it-works {
    background: #1e293b;
}

.step {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.step h3 {
    color: #f1f5f9;
}

.step-number {
    box-shadow: 0 0 20px var(--glow-primary);
}

/* CTA 区域 */
.cta-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at center, var(--glow-primary) 0%, transparent 70%);
    pointer-events: none;
}

.cta-section h2,
.cta-section p {
    position: relative;
    z-index: 1;
}

.cta-section .btn {
    position: relative;
    z-index: 1;
    background: var(--gradient);
    color: #0f172a;
}

/* 页脚 */
.footer {
    background: #0f172a;
    border-top: 1px solid var(--border-color);
}

.footer-bottom {
    border-top-color: var(--border-color);
}

/* 页面标题 */
.page-header {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 0%, var(--glow-primary) 0%, transparent 50%);
    pointer-events: none;
}

.page-header h1 {
    color: #f1f5f9;
    position: relative;
}

.page-header p {
    color: #94a3b8;
    position: relative;
}

/* 功能详情 */
.feature-detail {
    background: #0f172a;
}

.feature-detail.alt-bg {
    background: #1e293b;
}

.feature-badge {
    box-shadow: 0 0 15px var(--glow-primary);
}

.feature-info h2 {
    color: #f1f5f9;
}

.feature-info > p {
    color: #94a3b8;
}

.feature-list li {
    color: #94a3b8;
}

.feature-demo {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

/* 下载页 */
.download-section {
    background: #0f172a;
}

.download-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.download-card:hover {
    border-color: var(--primary);
    box-shadow: 0 0 30px var(--glow-primary);
}

.download-card h2 {
    color: #f1f5f9;
}

.download-card .version {
    color: var(--primary);
}

.download-card .requirements,
.download-card .size {
    color: #94a3b8;
}

.install-guide {
    background: #1e293b;
}

.guide-tab {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: #94a3b8;
}

.guide-tab.active {
    background: var(--gradient);
    color: #0f172a;
    border-color: transparent;
}

.install-steps li {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.step-content h4 {
    color: #f1f5f9;
}

.step-content p {
    color: #94a3b8;
}

.changelog {
    background: #0f172a;
}

.changelog-item {
    border-left-color: var(--primary);
}

.changelog-version {
    box-shadow: 0 0 10px var(--glow-primary);
}

/* 定价页 */
.free-tier {
    background: #0f172a;
}

.free-card {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    border: 1px solid var(--border-color);
}

.free-card h2 {
    color: #f1f5f9;
}

.free-desc {
    color: #94a3b8;
}

.free-feature {
    background: var(--card-bg);
    color: #e2e8f0;
    border: 1px solid var(--border-color);
}

.pricing-section {
    background: #0f172a;
}

.pricing-section.alt-bg {
    background: #1e293b;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.pricing-card:hover {
    box-shadow: 0 0 30px var(--glow-primary);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: 0 0 30px var(--glow-primary);
}

.popular-badge {
    box-shadow: 0 0 15px var(--glow-primary);
}

.pricing-card h3 {
    color: #94a3b8;
}

.amount {
    color: #f1f5f9;
}

.currency {
    color: #94a3b8;
}

.bonus {
    color: #10b981;
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.total {
    color: #64748b;
}

.pricing-features li {
    color: #94a3b8;
}

.pricing-features li.highlight {
    color: var(--primary);
}

/* FAQ */
.faq-section {
    background: #1e293b;
}

.faq-item {
    border-bottom-color: var(--border-color);
}

.faq-question {
    color: #f1f5f9;
}

.faq-toggle {
    color: var(--primary);
}

.faq-answer {
    color: #94a3b8;
}

/* 更多功能 */
.more-features {
    background: #0f172a;
}

.more-features .feature-card {
    background: var(--card-bg);
}

/* 动画效果 */
@keyframes glow-pulse {
    0%, 100% {
        box-shadow: 0 0 20px var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 40px var(--glow-primary), 0 0 60px var(--glow-secondary);
    }
}

.btn-primary:hover {
    animation: glow-pulse 2s infinite;
}

/* 模拟屏幕 */
.mockup-screen {
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0, 212, 255, 0.1);
}

/* Section 标题 */
.section-title {
    color: #f1f5f9;
}

.section-subtitle {
    color: #94a3b8;
}