/* Giao diện trang tải AutoVideo và hướng dẫn cài đặt */
.dl-page-header { text-align: center; max-width: 860px; margin: 40px auto 32px; padding: 0 16px; }
.dl-page-header h1 { font: 700 clamp(34px, 3.6vw, 48px)/1.15 var(--font-display); letter-spacing: -.02em; margin: 16px 0 12px; }
.dl-page-header .lead { font-size: 17px; line-height: 1.6; color: var(--muted); }
.dl-cards-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; margin-bottom: 48px; }
.dl-os-card { display: flex; flex-direction: column; padding: 32px 28px; border: 2px solid #d4e4fc; border-radius: 24px; background: #fff; box-shadow: 0 12px 36px rgba(10, 42, 100, .06); position: relative; }
.dl-os-card.primary-rec { border-color: var(--blue); box-shadow: 0 16px 44px rgba(7, 86, 233, .12); }
.dl-os-badge { position: absolute; top: -14px; left: 24px; background: var(--blue); color: #fff; font-size: 12px; font-weight: 800; padding: 4px 14px; border-radius: 999px; text-transform: uppercase; letter-spacing: .06em; }
.dl-os-icon { width: 56px; height: 56px; margin-bottom: 16px; display: grid; place-items: center; background: #edf4ff; border-radius: 16px; color: var(--blue); }
.dl-os-icon svg { width: 32px; height: 32px; }
.dl-os-title { font-size: 24px; font-weight: 800; margin-bottom: 6px; color: var(--navy); }
.dl-os-sub { font-size: 14.5px; color: var(--muted); margin-bottom: 20px; }
.dl-os-btn { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 2px; margin-bottom: 16px; width: 100%; min-height: 58px; padding: 10px 20px; border-radius: 14px; }
.dl-os-btn .btn-main-line { font-size: 17px; font-weight: 800; line-height: 1.25; }
.dl-os-btn .btn-sub-line { font-size: 13px; font-weight: 600; line-height: 1.25; opacity: .92; }
.dl-os-req { font-size: 13.5px; line-height: 1.5; color: #475569; padding: 12px 14px; border-radius: 12px; background: #f8fbff; border: 1px solid #e2edfd; margin-bottom: 16px; }
.dl-step-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14.5px; font-weight: 700; color: var(--blue); text-decoration: underline; margin-top: auto; min-height: 44px; }
.dl-summary-block { padding: 36px; border: 1px solid #dce8fa; border-radius: 24px; background: #f6faff; margin-bottom: 44px; }
.dl-summary-block h2 { font-size: clamp(24px, 2.4vw, 32px); margin-bottom: 20px; }
.dl-summary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.dl-summary-item { background: #fff; border: 1px solid #e1ecfa; border-radius: 16px; padding: 20px; }
.dl-summary-item h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; color: var(--navy); }
.dl-summary-item img { border-radius: 10px; margin-bottom: 12px; border: 1px solid #e3eefc; width: 100%; height: auto; }
.dl-support-block { padding: 32px; border: 1px solid #d8e5f8; border-radius: 20px; background: #fff; text-align: center; margin-bottom: 48px; }
.dl-support-block h3 { font-size: 20px; font-weight: 800; margin-bottom: 12px; color: var(--navy); }
.dl-support-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 18px; }
.dl-support-links a { display: inline-flex; align-items: center; justify-content: center; text-align: center; line-height: 1.35; min-height: 44px; padding: 10px 20px; border-radius: 12px; border: 1px solid #cbdcf7; background: #f8fbff; color: var(--blue); font-weight: 700; font-size: 14.5px; }
.dl-support-links a:hover { background: #fff; border-color: var(--blue); }
/* Chi tiết trang Windows / Mac */
.dl-detail-hero { padding: 40px 0 24px; }
.dl-direct-box { padding: 24px 28px; border: 2px solid var(--blue); border-radius: 20px; background: #f4f8ff; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 36px; }
.dl-direct-info h2 { font-size: 24px; margin: 0 0 6px; }
.dl-direct-info p { font-size: 15px; color: var(--muted); margin: 0; }
.dl-switch-links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14.5px; margin-top: 8px; }
.dl-switch-links a { color: var(--blue); text-decoration: underline; font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; }
.dl-direct-action { flex-shrink: 0; }
.dl-direct-box .dl-os-btn { width: auto; min-width: 256px; margin-bottom: 0; }
.dl-guide-steps { display: grid; gap: 28px; margin-bottom: 48px; }
.dl-guide-step-card { padding: 24px; border: 1px solid #dbe7fa; border-radius: 20px; background: #fff; box-shadow: 0 4px 16px rgba(10, 42, 100, .04); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 24px; align-items: center; }
.dl-guide-step-card.reverse { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
.dl-step-badge { display: inline-block; font-size: 13px; font-weight: 800; color: #fff; background: var(--blue); padding: 4px 12px; border-radius: 999px; margin-bottom: 10px; }
.dl-guide-step-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; color: var(--navy); }
.dl-guide-step-card p, .dl-guide-step-card ol { font-size: 15px; line-height: 1.6; color: #1e3358; margin: 0 0 10px; }
.dl-guide-step-card ol { padding-left: 20px; list-style: decimal; }
.dl-guide-step-card li { margin-bottom: 6px; }
.dl-guide-step-card img { width: 100%; border-radius: 12px; border: 1px solid #e2edfd; box-shadow: 0 6px 18px rgba(10, 36, 80, .06); }
.dl-trouble-box { padding: 36px 32px; border: 1px solid #dce8fa; border-radius: 24px; background: #fff; margin-bottom: 48px; box-shadow: 0 4px 20px rgba(10, 42, 100, .04); }
.dl-trouble-box h2 { font-size: clamp(24px, 2.4vw, 32px); margin-bottom: 8px; color: var(--navy); }
.dl-trouble-box .lead { font-size: 15.5px; color: var(--muted); margin-bottom: 24px; }
.dl-trouble-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.dl-trouble-item { padding: 20px; border-radius: 16px; background: #f8fbff; border: 1px solid #e3edfa; }
.dl-trouble-item h4 { font-size: 16.5px; font-weight: 800; color: var(--navy); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.dl-trouble-item p { font-size: 14.5px; line-height: 1.6; color: #2a3e63; margin: 0; }
.dl-trouble-item code { background: #e8f0fe; padding: 2px 6px; border-radius: 6px; font-family: ui-monospace, Consolas, monospace; font-size: 13px; color: #0b2f70; }
.dl-advanced-note { margin-top: 10px; padding: 8px 12px; border-radius: 10px; background: #eef5ff; border: 1px solid #d4e4fc; font-size: 13.5px; }
.dl-advanced-note summary { cursor: pointer; font-weight: 700; color: var(--blue); min-height: 44px; padding: 6px 4px; line-height: 1.35; display: flex; align-items: center; }
.dl-advanced-note p { margin-top: 6px; font-size: 13.5px; }
@media (max-width: 900px) { .dl-cards-grid, .dl-summary-grid, .dl-trouble-grid { grid-template-columns: 1fr; } .dl-guide-step-card, .dl-guide-step-card.reverse { grid-template-columns: 1fr; } .dl-summary-block, .dl-trouble-box { padding: 24px 20px; } .dl-direct-action, .dl-direct-box .dl-os-btn { width: 100%; } .dl-switch-links { flex-direction: column; align-items: flex-start; gap: 2px; } .dl-support-links a { width: 100%; } }