/* 蓝莓视频 全局视觉样式表 - 高端暗黑影音风格 */
:root {
    --bg-main: #0a0c16;
    --bg-card: #13172b;
    --bg-card-hover: #1c223e;
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --gradient-glow: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --text-title: #ffffff;
    --text-body: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.08);
    --nav-bg: rgba(10, 12, 22, 0.85);
    --max-width: 1200px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-body);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* 头部导航 Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-title);
    letter-spacing: 0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-glow);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-body);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    color: #ffffff;
    text-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
}

.btn-cta {
    background: var(--gradient-glow);
    color: #ffffff;
    padding: 0.6rem 1.4rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(168, 85, 247, 0.5);
}

/* 页面公用 Hero 头部Banner */
.page-hero {
    padding: 4rem 1.5rem 2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.page-hero h1 {
    font-size: 2.5rem;
    color: var(--text-title);
    margin-bottom: 1rem;
    background: linear-gradient(180deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-hero p {
    font-size: 1.1rem;
    color: var(--text-body);
}

/* 主内容容器 */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 5rem;
}

/* 卡片与网格布局 */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
}

.card-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.card h3 {
    color: var(--text-title);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

/* 页脚 Footer */
footer {
    background: #06070d;
    border-top: 1px solid var(--border-color);
    padding: 3rem 1.5rem 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-col h4 {
    color: var(--text-title);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.5rem;
}

.footer-col a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* 响应式适配 Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* 简易移动端响应处理 */
    }
    .page-hero h1 {
        font-size: 1.8rem;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}