/* ============================================
   Components — 通用组件样式
   ============================================ */

/* ---- 按钮 ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1.5;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    border: none;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background: var(--gradient-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(0, 84, 166, 0.3);
    color: #FFFFFF;
}

.btn-outline {
    background: transparent;
    color: var(--color-text-light);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.7);
    color: #FFFFFF;
}

.btn-outline-dark {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

.btn-outline-dark:hover {
    background: var(--color-primary-10);
    color: var(--color-primary);
}

.btn-lg {
    padding: var(--space-md) var(--space-2xl);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

.btn-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ---- 标签 ---- */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--space-sm);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.tag-hot {
    background: linear-gradient(135deg, #FF6B35, #FF8E53);
    color: #FFFFFF;
}

.tag-new {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #FFFFFF;
}

/* ---- Section标题 ---- */
.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-3xl);
}

.section-header .section-label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-md);
}

.section-dark .section-header .section-label {
    color: var(--color-accent);
}

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto;
}

/* ---- 产品卡片 ---- */
.product-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
    overflow: hidden;
}

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

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.product-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--color-primary-10);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    font-size: 24px;
}

.product-card h3 {
    margin-bottom: var(--space-sm);
    font-size: var(--text-xl);
}

.product-card p {
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.product-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    transition: gap var(--transition-fast);
}

.product-card:hover .card-link {
    gap: var(--space-sm);
}

/* ---- 特性项 ---- */
.feature-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
}

.feature-item-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #FFFFFF;
    font-size: 20px;
}

.feature-item h4 {
    margin-bottom: var(--space-xs);
}

.feature-item p {
    font-size: var(--text-sm);
}

/* ---- 视频容器 ---- */
.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 */
    background: var(--color-bg-dark-3);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.video-wrapper iframe,
.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    background: rgba(0, 84, 166, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 2;
}

.video-play-btn:hover {
    transform: translate(-50%, -50%) scale(1.08);
    background: var(--color-primary);
}

.video-play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 20px solid #FFFFFF;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 4px;
}

/* ---- 下载项 ---- */
.download-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-light-2);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast);
}

.download-item:hover {
    background: var(--color-bg-light-3);
}

.download-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    flex-shrink: 0;
}

.download-item-info {
    flex: 1;
    min-width: 0;
}

.download-item-info h4 {
    font-size: var(--text-base);
    margin-bottom: 2px;
}

.download-item-meta {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
    .btn-lg {
        padding: var(--space-sm) var(--space-xl);
        font-size: var(--text-sm);
    }

    .product-card {
        padding: var(--space-xl);
    }

    .section-header {
        margin-bottom: var(--space-2xl);
    }
}