/* industries block — "Как это работает в каждой отрасли?" (extracted from /ai-conference).
 * 3D-барабан отраслей + связанные demo-панели (3-шаговый flow + результат).
 */
.pb-industries {
    --ind-primary: #667eea;
    --ind-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --ind-text-dark: #1a1a2e;
    --ind-text-muted: #666;
    --ind-radius: 12px;
}
.pb-industries .pb-ind-inner { width: 100%; max-width: none; }
.pb-industries .ac-section { padding: 18px 0; }
.pb-industries .ac-section-lavender { background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%); }
.pb-industries .ac-section-accent { background: #f8f9fa; }
.pb-industries .ac-badge { display: inline-block; background: rgba(102,126,234,0.08); color: var(--ind-primary); border-radius: 50px; padding: 2px 10px; font-size: 0.68rem; font-weight: 600; margin-bottom: 3px; letter-spacing: 0.3px; }
.pb-industries .ac-section-title { font-size: 1.35rem; font-weight: 700; color: var(--ind-text-dark); margin-bottom: 2px; text-align: center; }
.pb-industries .ac-section-subtitle { font-size: 0.85rem; color: var(--ind-text-muted); text-align: center; max-width: 560px; margin: 0 auto 12px; line-height: 1.5; }

/* ===== 3D DRUM ===== */
.pb-industries .ac-drum-layout { display: flex; flex-direction: row; align-items: center; gap: 30px; margin-top: 4px; padding: 0 10px; }
.pb-industries .ac-drum-scene {
    flex: 1; min-width: 0; width: 100%; max-width: 900px;
    /* Пропорции как на /ai-conference (эталон): height 310, perspective 1200. */
    height: 380px; perspective: 3000px;
    display: flex; align-items: center; justify-content: center;
    position: relative; background: #ffffff;
    border-radius: 20px; padding: 14px 16px;
    overflow: hidden; /* ±80° грани clipятся (вмещается), 3 передние + зазоры внутри */
}
.pb-industries .ac-drum {
    width: var(--face-w, 260px); height: var(--face-h, 280px); position: relative;
    transform-style: preserve-3d;
    transition: transform 1.4s cubic-bezier(.25,.1,.25,1);
    margin: auto;
    align-self: center;
    flex: 0 0 auto;
}
.pb-industries .ac-drum-face {
    position: absolute; width: var(--face-w, 260px); height: var(--face-h, 280px);
    backface-visibility: hidden;
    display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
    padding: 22px 18px; text-align: center; border-radius: 16px;
    background: linear-gradient(135deg, #6b50b0 0%, #4f3d96 100%);
    border: 1px solid rgba(102,126,234,.35);
    box-shadow: inset 0 0 20px rgba(102,126,234,.05);
}
.pb-industries .ac-drum-face .face-icon { width: 56px; height: 56px; border-radius: 14px; background: rgba(102,126,234,.25); display: flex; align-items: center; justify-content: center; font-size: 2rem; color: #c4b5fd; margin-bottom: 14px; }
.pb-industries .ac-drum-face .face-title { font-size: 1.35rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.pb-industries .ac-drum-face .face-tag { font-size: 0.85rem; font-weight: 600; background: rgba(102,126,234,.3); color: #c4b5fd; padding: 3px 10px; border-radius: 20px; margin-bottom: 10px; }
.pb-industries .ac-drum-face .face-desc { font-size: 1.05rem; line-height: 1.45; color: rgba(255,255,255,.7); }

.pb-industries .ac-drum-nav { display: flex; flex-direction: column; gap: 5px; flex-shrink: 0; width: 170px; align-self: stretch; justify-content: space-between; padding: 8px 0; }
.pb-industries .ac-drum-nav button { border: 1px solid rgba(102,126,234,.3); background: #fff; color: #444; padding: 9px 13px; border-radius: 8px; cursor: pointer; font-size: 0.82rem; font-weight: 600; transition: all .25s ease; font-family: inherit; text-align: left; box-shadow: 0 1px 4px rgba(0,0,0,.06); }
.pb-industries .ac-drum-nav button:hover, .pb-industries .ac-drum-nav button.active { background: rgba(102,126,234,.5); color: #fff; border-color: rgba(102,126,234,.6); }
.pb-industries .ac-drum-nav button.active { transform: scale(1.06); }

/* ===== DEMO PANELS ===== */
.pb-industries .ac-demo-panel { display: none; border-radius: var(--ind-radius); overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.08); border: 1px solid #e2e8f0; background: #fff; }
.pb-industries .ac-demo-panel.active { display: block; }
.pb-industries .ac-demo-card { display: flex; align-items: stretch; }
.pb-industries .ac-demo-visual { flex: 0 0 70px; display: flex; align-items: center; justify-content: center; font-size: 2rem; position: relative; background: #f0edff; color: var(--ind-primary); }
.pb-industries .ac-demo-content { flex: 1; padding: 8px 12px; }
.pb-industries .ac-demo-content h4 { font-size: 0.95rem; font-weight: 700; color: var(--ind-text-dark); margin-bottom: 5px; }
.pb-industries .ac-demo-content h4 i { color: var(--ind-primary); margin-right: 5px; }
.pb-industries .ac-demo-flow { margin-bottom: 6px; }
.pb-industries .ac-demo-flow-item { display: flex; align-items: center; gap: 6px; padding: 2px 0; font-size: 0.88rem; color: var(--ind-text-muted); }
.pb-industries .ac-demo-flow-item .num { width: 22px; height: 22px; border-radius: 50%; background: var(--ind-gradient); color: white; display: flex; align-items: center; justify-content: center; font-size: 0.68rem; font-weight: 700; flex-shrink: 0; }
.pb-industries .ac-demo-flow-item .arrow { color: var(--ind-primary); font-size: 0.8rem; }
.pb-industries .ac-demo-result { background: #f8f9fa; border-radius: 6px; padding: 6px 10px; font-size: 0.85rem; color: var(--ind-text-muted); margin-top: 4px; line-height: 1.45; }
.pb-industries .ac-demo-result strong { color: var(--ind-text-dark); }

/* ===== RESPONSIVE ===== */
@media(max-width:560px){
    .pb-industries .ac-section { padding: 10px 0; }
    .pb-industries .pb-ind-inner { padding: 0 4px; }
    .pb-industries .ac-drum-layout { flex-direction: column-reverse; gap: 10px; padding: 0 2px; }
    .pb-industries .ac-drum-nav { width: 100%; flex-direction: row; flex-wrap: wrap; justify-content: center; }
    .pb-industries .ac-drum-nav button { flex: 0 1 auto; padding: 5px 9px; font-size: 0.62rem; }
    .pb-industries .ac-drum-scene { width: 100%; max-width: 100%; height: 280px; min-height: 280px; flex: 0 0 auto; perspective: 900px; padding: 10px 4px; overflow: hidden; border-radius: 14px; }

    .pb-industries .ac-drum-face .face-title { font-size: .9rem; }
    .pb-industries .ac-drum-face .face-desc { font-size: .68rem; }
    .pb-industries .ac-drum-face .face-icon { width: 40px; height: 40px; font-size: 1.1rem; }
    .pb-industries .ac-demo-card { flex-direction: column; }
    .pb-industries .ac-demo-visual { flex: 0 0 auto; min-height: 60px; }
}