/* ======================================================================
   [0xA1C2] 广告卡片
   ====================================================================== */
.ad-box {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 40px;
    text-align: center;
    flex: 1;
    min-height: 400px;
    transition: background 0.3s, border-color 0.3s;
}
.ad-box .content-box {
    max-width: 600px;
    line-height: 1.8;
}
.ad-box .icon {
    font-size: 60px;
    margin-bottom: 20px;
}
.ad-box h2 {
    font-size: 28px;
    color: var(--text-primary);
    font-weight: 300;
    margin-bottom: 16px;
}
.ad-box p {
    font-size: 18px;
    color: var(--text-secondary);
}
.ad-box .construction {
    display: inline-block;
    margin-top: 16px;
    padding: 6px 24px;
    border: 1px dashed var(--border-color);
    border-radius: 30px;
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* ======================================================================
   [0xA1C3] 友链卡片（2026-11-01：第一个位置留给 DeepSeek Harness）
   ====================================================================== */
.ad-box .ad-lead {
    font-size: 16px;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 26px;
}
.ad-friend {
    text-align: left;
    margin: 0 auto 24px;
    padding: 24px 26px 22px;
    background: rgba(127, 127, 127, 0.06);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--border-light);
    border-radius: 12px;
    line-height: 1.95;
}
.ad-friend-name {
    font-size: 20px;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}
.ad-friend-name span {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-left: 10px;
}
.ad-friend p {
    font-size: 15.5px;
    color: var(--text-secondary);
    margin: 0 0 14px;
}
.ad-friend p:last-of-type { margin-bottom: 0; }
.ad-friend-quote {
    margin: 18px 0 16px;
    padding: 12px 18px;
    border-left: 2px solid var(--border-color);
    color: var(--text-muted);
    font-size: 14.5px;
    line-height: 1.9;
}
.ad-friend-quote span { color: var(--text-muted); opacity: 0.85; }
.ad-friend-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}
.ad-friend-tags span {
    font-size: 12.5px;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3px 12px;
    letter-spacing: 0.5px;
}
@media (max-width: 640px) {
    .ad-box { padding: 26px 18px; }
    .ad-friend { padding: 18px 16px 16px; }
    .ad-friend p { font-size: 15px; }
}