/* ========================================
   BBICS 楼宇融合管控 — 专页（沿用企业 Agent 版式，金色楼宇主题）
   字号 / 颜色一律使用 style.css :root 变量，禁止硬编码
   ======================================== */

html:has(.bbics-body) {
    background-color: var(--color-bg-light);
}

.bbics-body {
    background: var(--color-bg-light);
    min-height: 100dvh;
    min-height: 100svh;
    padding-top: calc(var(--nav-offset, 72px) + env(safe-area-inset-top, 0px));
}

.bbics {
    --bbics-navy: var(--color-industrial-blue);
    --bbics-navy-deep: var(--color-secondary-dark);
    --bbics-heading: var(--color-text-heading);
    --bbics-gold: var(--bbics-accent);
    --bbics-gold-dim: var(--bbics-accent-dim);
    --bbics-glow: var(--bbics-accent-glow);
    --bbics-border: var(--bbics-accent-border);
    --bbics-section-y: clamp(3.25rem, 6.5vw, 5rem);
    --bbics-head-gap: clamp(1.75rem, 3.5vw, 2.75rem);
    /* 拓扑 SVG 字号 — clamp 对齐站点 token，框体留白由 viewBox 保证 */
    --bbics-svg-fs: clamp(10px, 0.88rem, 12px);
    --bbics-svg-fs-title: clamp(11px, 0.95rem, 13px);
    --bbics-svg-fs-meta: clamp(9px, 0.78rem, 11px);
    --bbics-topology-gap: 56;
    --bbics-topology-vdrop: 56;
    /* 拓扑 SVG 形状 — 与页面卡片 / 分区 token 对齐 */
    --bbics-svg-zone-fill: var(--bbics-surface-tint);
    --bbics-svg-zone-stroke: var(--color-border-slate);
    --bbics-svg-band-fill: var(--bbics-surface-tint);
    --bbics-svg-band-stroke: var(--color-border-slate);
    --bbics-svg-node-fill: var(--color-white);
    --bbics-svg-node-stroke: var(--color-border-slate-light);
    overflow-x: hidden;
    background: var(--color-bg-light);
}

.bbics-page {
    padding-top: 0;
}

.bbics-page .product-detail {
    margin-bottom: 0;
}

.bbics-page #bbics.product-detail.section {
    padding-top: 0;
    padding-bottom: 0;
}

/* 产品专页首屏 Hero：去掉 .section 默认顶距，避免顶栏下白条 */
.products-page > .product-detail.section:first-of-type,
.bbics-page > .product-detail.section:first-of-type {
    padding-top: 0;
}

.products-page .bbims-hero-band,
.bbics-page .bbics-hero-band {
    padding-top: var(--spacing-lg);
}

/* Hero 视频区 */
.bbics-hero-band {
    padding: var(--spacing-lg) 0 var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-faint);
    background-color: var(--surface-page);
    background-image:
        radial-gradient(ellipse 90% 55% at 12% 0%, var(--bbics-hero-glow), transparent 52%),
        radial-gradient(ellipse 70% 45% at 95% 100%, var(--bbics-hero-depth), transparent 50%);
}

.bbics-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    margin: 0 0 14px;
    padding: 6px 14px;
    font-size: var(--font-size-2xs);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--bbics-accent-text);
    border: 1px solid var(--bbics-accent-border);
    border-radius: 999px;
    background: var(--bbics-accent-bg);
}

.bbics-hero__head {
    margin-bottom: var(--spacing-md);
}

.bbics-hero__title {
    margin: 0 0 10px;
    font-size: clamp(2rem, 1.35rem + 2.2vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--bbics-heading);
}

.bbics-hero__brand {
    margin-right: 0.28em;
    color: var(--bbics-navy);
}

.bbics-hero__name {
    color: var(--bbics-heading);
}

.bbics-hero__subtitle {
    margin: 0 0 16px;
    font-size: var(--font-size-lead);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text-secondary);
}

.bbics-hero__caps {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.bbics-hero__caps li {
    padding: 5px 12px;
    font-size: var(--font-size-compact);
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text-body);
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    border-radius: 999px;
    box-shadow: var(--shadow-card-sm);
}

.bbics-hero__caps-accent {
    color: var(--bbics-accent-text);
    background: var(--bbics-accent-bg);
    border-color: var(--bbics-accent-border);
}

.bbics-video-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    max-height: min(420px, 42vh);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bbics-navy);
    box-shadow:
        var(--shadow-media),
        0 0 0 1px var(--bbics-accent-ring);
}

.bbics-video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: var(--bbics-navy);
}

.bbics .bbims-hero__copy h1 {
    color: var(--bbics-heading);
}

.bbics .bbims-hero__copy .description {
    margin-top: 0;
}

.bbics-page .bbims-hero {
    align-items: start;
}

.bbics-page .bbics-hero__actions {
    grid-column: 1 / -1;
    justify-content: center;
}

.bbics .bbims-hero__actions .btn-secondary {
    color: var(--bbics-navy);
    border: 2px solid var(--bbics-surface-border);
    background: transparent;
}

.bbics .bbims-hero__actions .btn-secondary:hover {
    color: var(--bbics-navy);
    border-color: var(--bbics-navy);
    background: var(--bbics-surface-hover);
}

.bbics .container {
    max-width: 1240px;
}

/* 分节：各大板块区分背景色 */
.bbics .ea-band,
.bbics .bbics-band {
    padding: var(--bbics-section-y) 0;
}

.bbics-band--value {
    background: linear-gradient(180deg, var(--color-white) 0%, var(--surface-page) 55%, var(--color-bg-light) 100%);
}

.bbics-band--pain {
    background:
        radial-gradient(ellipse 70% 45% at 50% 0%, var(--bbics-hero-glow), transparent 58%),
        linear-gradient(185deg, var(--color-bg-light) 0%, var(--surface-page) 48%, var(--color-bg-light) 100%);
    border-top: 1px solid var(--color-border-slate-light);
    border-bottom: 1px solid var(--color-border-faint);
}

.bbics-band--protocol {
    background:
        radial-gradient(ellipse 85% 55% at 18% 0%, var(--bbics-accent-bg), transparent 52%),
        linear-gradient(180deg, var(--surface-page) 0%, var(--bbics-accent-bg) 45%, var(--color-bg-light) 100%);
    border-top: 1px solid var(--bbics-accent-border);
    border-bottom: 1px solid var(--color-border-faint);
}

.bbics-band--modules {
    background: linear-gradient(180deg, var(--surface-page) 0%, var(--bbics-surface-tint) 100%);
    border-top: 1px solid var(--color-border-faint);
}

.bbics-band--arch {
    background:
        radial-gradient(ellipse 75% 50% at 82% 100%, var(--bbics-hero-depth), transparent 55%),
        linear-gradient(185deg, var(--color-bg-light) 0%, var(--surface-page) 50%, var(--color-bg-light) 100%);
    border-top: 1px solid var(--color-border-slate-light);
}

.bbics-band--scenarios {
    background: linear-gradient(180deg, var(--surface-page) 0%, var(--color-white) 40%, var(--color-bg-light) 100%);
    border-top: 1px solid var(--color-border-faint);
}

.bbics-band--deploy {
    background:
        radial-gradient(ellipse 80% 50% at 50% 100%, var(--bbics-hero-depth), transparent 55%),
        linear-gradient(180deg, var(--color-bg-light) 0%, var(--bbics-surface-tint) 55%, var(--surface-page) 100%);
    border-top: 1px solid var(--color-border-slate-light);
}

.bbics .ea-band__head {
    margin-bottom: var(--bbics-head-gap);
}

.bbics .ea-band__head p,
.bbics .bbics-band .ea-band__head p {
    color: var(--color-text-secondary);
}

/* fade-in 阶梯延迟：Hero / KPI / 架构层 / 原则卡 / CTA */
.bbims-hero__media.fade-in {
    transition-delay: 0s;
}

.bbims-hero__copy.fade-in {
    transition-delay: 0.04s;
}

.bbics-hero__actions.fade-in {
    transition-delay: 0.08s;
}

.bbics-kpi.fade-in:nth-child(1) {
    transition-delay: 0.02s;
}

.bbics-kpi.fade-in:nth-child(2) {
    transition-delay: 0.04s;
}

.bbics-kpi.fade-in:nth-child(3) {
    transition-delay: 0.06s;
}

.bbics-kpi.fade-in:nth-child(4) {
    transition-delay: 0.08s;
}

.bbics-layer-row.fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-layer-row.fade-in:nth-child(2) {
    transition-delay: 0.03s;
}

.bbics-layer-row.fade-in:nth-child(3) {
    transition-delay: 0.06s;
}

.bbics-layer-row.fade-in:nth-child(4) {
    transition-delay: 0.09s;
}

.bbics-layer-row.fade-in:nth-child(5) {
    transition-delay: 0.12s;
}

.bbics-layer-row.fade-in:nth-child(6) {
    transition-delay: 0.15s;
}

.bbics-layer-row.fade-in:nth-child(7) {
    transition-delay: 0.18s;
}

.bbics-arch-principle.fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-arch-principle.fade-in:nth-child(2) {
    transition-delay: 0.04s;
}

.bbics-arch-principle.fade-in:nth-child(3) {
    transition-delay: 0.08s;
}

.bbics-arch-principle.fade-in:nth-child(4) {
    transition-delay: 0.12s;
}

.bbics-cta-band .fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-cta-band .fade-in:nth-child(2) {
    transition-delay: 0.04s;
}

.bbics-cta-band .fade-in:nth-child(3) {
    transition-delay: 0.08s;
}

@media (prefers-reduced-motion: reduce) {
    .bbics-kpi.fade-in,
    .bbics-layer-row.fade-in,
    .bbics-arch-principle.fade-in,
    .bbims-hero__media.fade-in,
    .bbims-hero__copy.fade-in,
    .bbics-hero__actions.fade-in,
    .bbics-cta-band .fade-in,
    .bbics-scenario.fade-in,
    .bbics-protocol.fade-in,
    .bbics-deploy.fade-in,
    .bbics-scenario-instance.fade-in,
    .bbics-topology-hub__title.fade-in,
    .bbics-topology-hub .bbics-topology.fade-in {
        transition-delay: 0s !important;
    }
}

/* container 内 header 为第 1 个子元素，scenario 从第 2 个起 */
.bbics-scenario.fade-in:nth-child(2) {
    transition-delay: 0s;
}

.bbics-scenario.fade-in:nth-child(3) {
    transition-delay: 0.04s;
}

.bbics-scenario.fade-in:nth-child(4) {
    transition-delay: 0.08s;
}

.bbics-scenario.fade-in:nth-child(5) {
    transition-delay: 0.12s;
}

.bbics-topology-hub__title.fade-in {
    transition-delay: 0s;
}

.bbics-topology-hub .bbics-topology.fade-in {
    transition-delay: 0.06s;
}

.bbics-protocol.fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-protocol.fade-in:nth-child(2) {
    transition-delay: 0.03s;
}

.bbics-protocol.fade-in:nth-child(3) {
    transition-delay: 0.06s;
}

.bbics-protocol.fade-in:nth-child(4) {
    transition-delay: 0.09s;
}

.bbics-protocol.fade-in:nth-child(5) {
    transition-delay: 0.12s;
}

.bbics-protocol.fade-in:nth-child(6) {
    transition-delay: 0.15s;
}

.bbics-deploy.fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-deploy.fade-in:nth-child(2) {
    transition-delay: 0.04s;
}

.bbics-deploy.fade-in:nth-child(3) {
    transition-delay: 0.08s;
}

.bbics-scenario-instance.fade-in:nth-child(1) {
    transition-delay: 0s;
}

.bbics-scenario-instance.fade-in:nth-child(2) {
    transition-delay: 0.05s;
}

.bbics-scenario-instance.fade-in:nth-child(3) {
    transition-delay: 0.1s;
}

.bbics-scenario-instance.fade-in:nth-child(4) {
    transition-delay: 0.15s;
}

.bbics-scenario-instance.fade-in:nth-child(5) {
    transition-delay: 0.2s;
}

.bbics-scenario-instance--more {
    border-style: dashed;
    border-color: var(--color-border-slate);
    background: linear-gradient(180deg, var(--color-surface-subtle) 0%, var(--color-white) 100%);
}

.bbics-scenario-instance--more .bbics-scenario-instance__head {
    background: transparent;
    border-bottom-style: dashed;
}

.bbics-scenario-more__desc {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.bbics-scenario-more__action {
    margin: 16px 0 0;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.bbics-scenario-more__action a {
    color: var(--bbics-navy);
    text-decoration: none;
}

.bbics-scenario-more__action a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.bbics .ea-pillar.fade-in:nth-child(5) {
    transition-delay: 0.08s;
}

.bbics .ea-pillar.fade-in:nth-child(6) {
    transition-delay: 0.1s;
}

.bbics .ea-pillar__icon {
    background: linear-gradient(135deg, var(--bbics-navy), var(--bbics-navy-deep));
    color: var(--bbics-gold);
    border: 1px solid var(--bbics-border);
}

.bbics .ea-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
    .bbics .ea-pillars {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .bbics .ea-pillars {
        grid-template-columns: 1fr;
    }
}

.bbics .ea-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
    .bbics .ea-stack {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .bbics .ea-stack {
        grid-template-columns: 1fr;
    }
}

.bbics .ea-stack__tag {
    color: var(--bbics-accent-text);
    border-color: var(--bbics-accent-border);
    background: var(--bbics-accent-bg-strong);
}

/* KPI 数据条 */
.bbics-kpi-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
}

.bbics-kpi-strip--light .bbics-kpi {
    background: var(--bbics-surface-tint);
    border: 1px solid var(--bbics-surface-border);
}

.bbics-kpi-strip--light .bbics-kpi__val {
    color: var(--bbics-navy);
    font-size: var(--font-size-ea-metric-val);
}

.bbics-kpi-strip--light .bbics-kpi__lbl {
    color: var(--color-text-muted);
}

.bbics-kpi {
    text-align: center;
    padding: 20px 12px;
    border-radius: 12px;
}

.bbics-kpi__val {
    display: block;
    font-size: var(--font-size-block-heading);
    font-weight: 800;
    line-height: 1.2;
}

.bbics-kpi__lbl {
    display: block;
    margin-top: 6px;
    font-size: var(--font-size-xs);
    letter-spacing: 0.04em;
}

/* 痛点场景卡 */
.bbics-scenario {
    padding: 28px 28px 24px;
    border-radius: 14px;
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-card-sm);
}

.bbics-scenario + .bbics-scenario {
    margin-top: 20px;
}

.bbics-scenario__title {
    margin: 0 0 12px;
    font-size: var(--font-size-ea-pillar-h3);
    font-weight: 700;
    color: var(--bbics-heading);
}

.bbics-scenario__pain,
.bbics-scenario__solution {
    margin: 0 0 10px;
    font-size: var(--font-size-ea-pillar-p);
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.bbics-scenario__pain strong {
    color: var(--color-semantic-danger);
}

.bbics-scenario__solution strong {
    color: var(--color-semantic-success);
}

/* 协议标签 */
.bbics-protocol-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.bbics-protocol {
    padding: 28px 24px;
    border-radius: 14px;
    text-align: center;
    background: var(--gradient-surface-card);
    border: 1px solid var(--color-border-slate);
    box-shadow: var(--shadow-card-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bbics-protocol:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-lg);
}

.bbics-protocol__name {
    margin: 0 0 12px;
    font-size: var(--font-size-subheading);
    font-weight: 700;
    line-height: 1.35;
    color: var(--bbics-heading);
}

.bbics-protocol__desc {
    margin: 0;
    font-size: var(--font-size-body);
    line-height: 1.75;
    color: var(--color-text-secondary);
}

/* 场景行业卡 */
.bbics-scene-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.bbics-scene {
    padding: 24px;
    border-radius: 14px;
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    transition: var(--transition-normal);
}

.bbics-scene:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-lg);
}

.bbics-scene h3 {
    margin: 0 0 12px;
    font-size: var(--font-size-ea-pillar-h3);
    color: var(--bbics-heading);
}

.bbics-scene p {
    margin: 0 0 8px;
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* 部署模式 */
.bbics-deploy-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.bbics-deploy {
    padding: 28px 24px;
    border-radius: 14px;
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-card-sm);
}

.bbics-deploy h3 {
    margin: 0 0 12px;
    font-size: var(--font-size-ea-pillar-h3);
    color: var(--bbics-heading);
}

.bbics-deploy p,
.bbics-deploy li {
    font-size: var(--font-size-sm);
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.bbics-deploy ul {
    margin: 12px 0 0;
    padding-left: 18px;
}

/* CTA */
.bbics-cta-band {
    padding: clamp(3.5rem, 7vw, 5rem) 0;
    background: var(--gradient-surface-dark);
    text-align: center;
}

.bbics-cta-band h2 {
    margin: 0 0 16px;
    font-size: var(--font-size-ea-band-h2);
    color: var(--color-text-on-dark-heading);
}

.bbics-cta-band p {
    margin: 0 auto 32px;
    max-width: 36em;
    font-size: var(--font-size-ea-band-lead);
    color: var(--color-text-on-dark-body);
    line-height: 1.8;
}

.bbics-cta-band__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 系统架构 · 分层色带（统一工业蓝调，与全站浅色卡片一致） */
.bbics-layer-stack {
    margin: 28px 0 0;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow-card-sm);
    border: 1px solid var(--color-border-subtle);
    background: var(--color-white);
}

.bbics-layer-row {
    display: flex;
    align-items: stretch;
    border-bottom: 1px solid var(--color-border-subtle);
}

.bbics-layer-row:last-child {
    border-bottom: none;
}

.bbics-layer-row:nth-child(even) .bbics-layer-body {
    background: var(--color-surface-subtle);
}

.bbics-layer-label {
    width: 148px;
    flex-shrink: 0;
    padding: 16px 14px;
    color: var(--bbics-navy);
    font-weight: 700;
    font-size: var(--font-size-body);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.45;
    background: var(--bbics-surface-tint);
    border-right: 1px solid var(--color-border-subtle);
    border-left: 3px solid var(--bbics-navy);
}

.bbics-layer-body {
    flex: 1;
    padding: 14px 18px;
    background: var(--color-white);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.bbics-layer-chip {
    padding: 6px 14px;
    border-radius: 999px;
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
}

.bbics-layer-row:nth-child(even) .bbics-layer-chip {
    background: var(--color-surface-subtle);
}

/* 保留语义 class，样式统一，不再使用彩虹色 */
.bbics-layer-north .bbics-layer-label,
.bbics-layer-pres .bbics-layer-label,
.bbics-layer-biz .bbics-layer-label,
.bbics-layer-data .bbics-layer-label,
.bbics-layer-adapt .bbics-layer-label,
.bbics-layer-gw .bbics-layer-label,
.bbics-layer-field .bbics-layer-label {
    background: var(--bbics-surface-tint);
    color: var(--bbics-navy);
    border-left-color: var(--bbics-navy);
}

.bbics-arch-principles {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.bbics-arch-principle {
    padding: 20px 22px;
    border-radius: 14px;
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-card-sm);
}

.bbics-arch-principle h3 {
    margin: 0 0 10px;
    font-size: var(--font-size-ea-pillar-h3);
    font-weight: 700;
    color: var(--bbics-heading);
}

.bbics-arch-principle p {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.bbics-topology-hub {
    margin-top: 28px;
    padding: 24px 28px;
    border-radius: 14px;
    background: var(--color-white);
    border: 1px solid var(--color-border-slate-light);
    box-shadow: var(--shadow-card-sm);
}

.bbics-topology-hub__title {
    margin: 0 0 12px;
    font-size: var(--font-size-body);
    font-weight: 700;
    color: var(--bbics-heading);
    text-align: center;
}

.bbics-topology {
    margin: 0;
    padding: 24px 28px;
    border-radius: 12px;
    background: var(--color-white);
    border: 1px solid var(--color-border-slate-light);
    overflow-x: auto;
}

.bbics-topology svg {
    display: block;
    width: 100%;
    max-width: 720px;
    margin-inline: auto;
    min-width: 520px;
    height: auto;
    font-family: inherit;
}

/* 拓扑 SVG 文字 — clamp 对齐 --font-size-sm / compact / xs，不随 SVG 缩放变形 */
.bbics-topology svg .bbics-svg-text {
    font-size: var(--bbics-svg-fs);
    font-weight: 500;
    fill: var(--color-text-body);
}

.bbics-topology svg .bbics-svg-text--strong {
    font-size: var(--bbics-svg-fs-title);
    font-weight: 600;
    fill: var(--color-text-heading);
}

.bbics-topology svg .bbics-svg-text--muted {
    font-size: var(--bbics-svg-fs-meta);
    fill: var(--color-text-muted);
}

.bbics-topology svg .bbics-svg-text--on-dark,
.bbics-topology svg .bbics-svg-text--strong.bbics-svg-text--on-dark {
    font-size: var(--bbics-svg-fs-title);
    font-weight: 600;
    fill: var(--color-white);
}

.bbics-topology svg .bbics-svg-text--on-dark-sub {
    font-size: var(--bbics-svg-fs-meta);
    font-weight: 500;
    fill: rgba(255, 255, 255, 0.88);
}

/* 拓扑 SVG 形状 — zone / band 同色系，node 白底 */
.bbics-topology svg .bbics-svg-zone {
    fill: var(--bbics-svg-zone-fill);
    stroke: var(--bbics-svg-zone-stroke);
    stroke-width: 1.5;
}

.bbics-topology svg .bbics-svg-band {
    fill: var(--bbics-svg-band-fill);
    stroke: var(--bbics-svg-band-stroke);
    stroke-width: 1.5;
}

.bbics-topology svg .bbics-svg-node {
    fill: var(--bbics-svg-node-fill);
    stroke: var(--bbics-svg-node-stroke);
    stroke-width: 1;
}

.bbics-topology svg .bbics-svg-node--optional {
    stroke-dasharray: 4 3;
    fill: var(--color-surface-subtle);
    stroke: var(--bbics-svg-node-stroke);
}

.bbics-topology svg .bbics-svg-hub {
    fill: var(--bbics-navy);
    stroke: var(--bbics-navy-deep);
    stroke-width: 1.5;
}

.bbics-topology svg .bbics-svg-envelope {
    fill: var(--color-surface-subtle);
    stroke: var(--bbics-svg-zone-stroke);
    stroke-width: 1.5;
}

.bbics-topology svg .bbics-svg-connectors {
    pointer-events: none;
}

.bbics-topology svg .bbics-svg-line,
.bbics-topology svg .bbics-svg-connectors polyline {
    stroke: var(--color-text-muted);
    stroke-width: 1.25;
    fill: none;
}

.bbics-topology svg .bbics-svg-line--dash {
    stroke-dasharray: 4 3;
}

.bbics-topology svg .bbics-svg-marker {
    fill: var(--color-text-muted);
}

.bbics-topology figcaption {
    margin-top: 16px;
    font-size: var(--font-size-compact);
    line-height: 1.6;
    color: var(--color-text-muted);
    text-align: center;
}

/* 应用场景实例（含拓扑） */
.bbics-scenario-list {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.bbics-scenario-instance {
    border-radius: 16px;
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-card-sm);
    overflow: hidden;
}

.bbics-scenario-instance__head {
    padding: 24px 28px 16px;
    border-bottom: 1px solid var(--color-border-subtle);
    background: linear-gradient(180deg, var(--color-surface-subtle) 0%, var(--color-white) 100%);
}

.bbics-scenario-instance__head h3 {
    margin: 0 0 10px;
    font-size: var(--font-size-ea-pillar-h3);
    color: var(--bbics-heading);
}

.bbics-scenario-instance__meta {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.bbics-scenario-instance__meta strong {
    color: var(--bbics-heading);
}

.bbics-scenario-instance__body {
    padding: 24px 28px 28px;
}

.bbics-scenario-instance__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.bbics-scenario-tag {
    padding: 5px 12px;
    border-radius: 999px;
    font-size: var(--font-size-compact);
    font-weight: 600;
    color: var(--bbics-accent-text);
    background: var(--bbics-accent-bg);
    border: 1px solid var(--bbics-accent-border);
}

.bbics-scenario-tag--fire {
    color: var(--color-semantic-danger);
    background: #fef2f2;
    border-color: #fecaca;
}

.bbics-scenario-tag--energy {
    color: var(--color-semantic-success);
    background: #ecfdf5;
    border-color: #a7f3d0;
}

.bbics-deploy-topology {
    margin-top: 32px;
}

@media (max-width: 900px) {
    .bbics-protocol-grid,
    .bbics-deploy-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bbics-arch-principles {
        grid-template-columns: 1fr;
    }

    .bbics-layer-label {
        width: 104px;
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 768px) {
    .bbics-kpi-strip {
        grid-template-columns: repeat(2, 1fr);
    }

    .bbics-scene-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .bbics-protocol-grid,
    .bbics-deploy-grid {
        grid-template-columns: 1fr;
    }
}