/* 网络广告设计前台 */
:root {
    --ad-primary: #2563eb;
    --ad-primary-dark: #1d4ed8;
    --ad-bg: #0f172a;
    --ad-surface: #ffffff;
    --ad-muted: #64748b;
    --ad-border: #e2e8f0;
    --ad-radius: 12px;
}

* { box-sizing: border-box; }
body.ad-site {
    margin: 0;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: #1e293b;
    background: #f8fafc;
    line-height: 1.6;
}

.ad-header {
    background: var(--ad-bg);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.15);
}
.ad-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.ad-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.02em;
}
.ad-logo span { color: #60a5fa; }
.ad-nav { display: flex; gap: 24px; align-items: center; }
.ad-nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}
.ad-nav a:hover, .ad-nav a.active { color: #fff; }
.ad-cart-badge {
    background: var(--ad-primary);
    color: #fff;
    border-radius: 999px;
    padding: 2px 8px;
    font-size: 12px;
    margin-left: 4px;
}

.ad-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #2563eb 100%);
    color: #fff;
    padding: 80px 20px 100px;
    text-align: center;
}
.ad-hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    margin: 0 0 16px;
    font-weight: 800;
}
.ad-hero p {
    max-width: 560px;
    margin: 0 auto 32px;
    color: #bfdbfe;
    font-size: 1.05rem;
}
.ad-btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}
.ad-btn-primary {
    background: #fff;
    color: var(--ad-primary-dark);
}
.ad-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); color: var(--ad-primary-dark); }
.ad-btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
    margin-left: 12px;
}
.ad-btn-outline:hover { background: rgba(255,255,255,0.1); color: #fff; }

.ad-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.ad-section { padding: 56px 0; }
.ad-section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}
.ad-section-desc {
    text-align: center;
    color: var(--ad-muted);
    margin-bottom: 40px;
}

.ad-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 32px;
}
.ad-categories a {
    padding: 8px 18px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--ad-border);
    color: #475569;
    text-decoration: none;
    font-size: 0.9rem;
}
.ad-categories a.active, .ad-categories a:hover {
    background: var(--ad-primary);
    border-color: var(--ad-primary);
    color: #fff;
}

.ad-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.ad-card {
    background: var(--ad-surface);
    border-radius: var(--ad-radius);
    overflow: hidden;
    border: 1px solid var(--ad-border);
    transition: box-shadow 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
}
.ad-card:hover {
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.12);
    transform: translateY(-4px);
}
.ad-card-img {
    height: 180px;
    background: #e2e8f0 center/cover no-repeat;
}
.ad-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.ad-card-tag {
    font-size: 12px;
    color: var(--ad-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.ad-card h3 { margin: 8px 0 6px; font-size: 1.1rem; }
.ad-card .subtitle { color: var(--ad-muted); font-size: 0.875rem; margin-bottom: 12px; flex: 1; }
.ad-price { font-size: 1.35rem; font-weight: 700; color: #dc2626; }
.ad-price small { font-size: 0.85rem; color: var(--ad-muted); font-weight: 400; text-decoration: line-through; margin-left: 8px; }
.ad-card-actions { margin-top: 16px; display: flex; gap: 8px; }
.ad-card-actions .ad-btn { flex: 1; text-align: center; padding: 10px; font-size: 0.9rem; }
.ad-btn-sm-primary { background: var(--ad-primary); color: #fff; }
.ad-btn-sm-primary:hover { background: var(--ad-primary-dark); color: #fff; }
.ad-btn-sm-ghost { background: #f1f5f9; color: #334155; }
.ad-btn-sm-ghost:hover { background: #e2e8f0; color: #334155; }

.ad-footer {
    background: var(--ad-bg);
    color: #94a3b8;
    padding: 40px 20px;
    text-align: center;
    font-size: 0.875rem;
}
.ad-footer a { color: #60a5fa; }

.ad-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 40px 0; }
@media (max-width: 768px) { .ad-detail { grid-template-columns: 1fr; } }
.ad-detail-img {
    border-radius: var(--ad-radius);
    min-height: 320px;
    background: #e2e8f0 center/cover no-repeat;
}
.ad-detail-content h1 { margin-top: 0; }
.ad-qty { width: 80px; padding: 8px; border: 1px solid var(--ad-border); border-radius: 6px; }

.ad-cart-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--ad-radius); overflow: hidden; }
.ad-cart-table th, .ad-cart-table td { padding: 16px; border-bottom: 1px solid var(--ad-border); text-align: left; }
.ad-cart-summary {
    margin-top: 24px;
    text-align: right;
    background: #fff;
    padding: 24px;
    border-radius: var(--ad-radius);
    border: 1px solid var(--ad-border);
}
.ad-form .form-group { margin-bottom: 16px; }
.ad-form label { display: block; margin-bottom: 6px; font-weight: 600; }
.ad-form input, .ad-form textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--ad-border);
    border-radius: 8px;
    font-size: 1rem;
}

.ad-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: -48px;
    position: relative;
    z-index: 2;
}
.ad-feature-box {
    background: #fff;
    padding: 28px;
    border-radius: var(--ad-radius);
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
    text-align: center;
}
.ad-feature-box h4 { margin: 12px 0 8px; }
.ad-feature-box p { margin: 0; color: var(--ad-muted); font-size: 0.9rem; }
.ad-feature-icon { font-size: 2rem; }

.ad-order-list .ad-order-item {
    background: #fff;
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    padding: 20px;
    margin-bottom: 16px;
}