/* =========================================
   Brand Video Page Styles
   ========================================= */

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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

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

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

/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
}

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

.back-link i {
    font-size: 1.2rem;
}

.brand-title h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* =========================================
   Video Section
   ========================================= */
.video-section {
    padding-top: 80px;
}

.video-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    background: #000;
    position: relative;
}

.brand-video {
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: contain;
    display: block;
}

/* =========================================
   Video Info Section
   ========================================= */
.video-info {
    padding: 4rem 0;
    background: var(--white);
}

.brand-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.brand-logo img {
    max-width: 250px;
    height: auto;
}

.video-info h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    text-align: center;
}

.video-info > .container > p {
    font-size: 1.2rem;
    color: var(--text-light);
    line-height: 1.8;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

/* =========================================
   Brand Features
   ========================================= */
.brand-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 15px;
    transition: var(--transition);
}

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

.feature-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

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

/* =========================================
   Action Buttons
   ========================================= */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    text-decoration: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

/* =========================================
   Responsive Design
   ========================================= */
@media (max-width: 768px) {
    .nav-wrapper {
        flex-direction: column;
        gap: 1rem;
    }
    
    .brand-title h1 {
        font-size: 1.2rem;
    }
    
    .video-info h2 {
        font-size: 2rem;
    }
    
    .video-info > .container > p {
        font-size: 1rem;
    }
    
    .brand-features {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-primary,
    .btn-secondary {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .brand-logo img {
        max-width: 150px;
    }
    
    .video-info h2 {
        font-size: 1.5rem;
    }
    
    .feature-item i {
        font-size: 2rem;
    }
    
    .feature-item h3 {
        font-size: 1.1rem;
    }
}