/* ============================================================
   page-flat-bag-machine.css
   Prefix: fb-
   Depends on: global.css (all tokens, base components)
   ============================================================ */


/* ============================================================
   S1 — HERO
   ============================================================ */

.fb-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.fb-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden; 
}

.fb-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  animation: cb-hero-breathe 8s ease-in-out infinite;
  transform-origin: center center;
}

.fb-hero__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 15%, rgba(215, 25, 32, .24), transparent 32%),
    radial-gradient(circle at 85% 25%, rgba(255, 255, 255, .06), transparent 34%),
    linear-gradient(135deg, rgba(11, 13, 16, .92) 0%, rgba(23, 26, 31, .85) 55%, rgba(36, 39, 46, .80) 100%);
}

.fb-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-8);
}

.fb-hero__badge {
  display: inline-block;
  font-family: 'DM Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--brand-mid);
  background: rgba(215, 25, 32, .12);
  border: 1px solid rgba(215, 25, 32, .30);
  border-radius: 100px;
  padding: 6px var(--sp-2);
  width: fit-content;
}

.fb-hero__title {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin: var(--sp-2) 0 0;
  max-width: 720px;
}

.fb-hero__subtitle {
  font-size: var(--text-md);
  color: rgba(255, 255, 255, .72);
  line-height: 1.65;
  max-width: 600px;
  margin: var(--sp-2) 0 0;
}

/* Trust bar */
.fb-hero__trust {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.fb-hero__divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, .18);
  flex-shrink: 0;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.trust-num {
  font-family: 'DM Mono', monospace;
  font-size: var(--text-xl);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.trust-unit {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, .60);
  margin-left: 2px;
}

.trust-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, .50);
  letter-spacing: .04em;
}

/* CTA group */
.fb-hero__cta-group {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}


/* ============================================================
   S2 — WHAT THIS MACHINE PRODUCES
   ============================================================ */

.fb-produces {
  padding: var(--sp-7) var(--sp-5);
}

.fb-produces__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.fb-produces__col {
  background: #fff;
  border-radius: var(--r-lg);
  border: 1px solid var(--gray-100);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.fb-produces__col:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--brand);
}

.fb-produces__col-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--gray-50);
}

.fb-produces__col-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}

.fb-produces__col:hover .fb-produces__col-img img {
  transform: scale(1.04);
}

.fb-produces__col-body {
  padding: var(--sp-3);
}

.fb-produces__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brand);
  background: var(--brand-tint);
  border-radius: 100px;
  padding: 3px var(--sp-2);
  margin-bottom: var(--sp-2);
}

.fb-produces__col-body h3 {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--gray-800);
  margin: 0 0 var(--sp-2);
}

.fb-produces__col-body p {
  font-size: var(--text-base);
  color: var(--gray-600);
  line-height: 1.65;
  margin: 0 0 var(--sp-2);
}

.fb-produces__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fb-produces__list li {
  font-size: var(--text-sm);
  color: var(--gray-600);
  padding-left: var(--sp-2);
  position: relative;
}

.fb-produces__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
}


/* ============================================================
   S3 — CHOOSE YOUR SERIES
   ============================================================ */

.fb-series {
  padding: var(--sp-7) var(--sp-5);
}

/* Series cards */
.fb-series__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.fb-series__card {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-lg);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  transition: border-color .25s ease, background .25s ease;
}

.fb-series__card:hover {
  border-color: var(--brand);
  background: rgba(255, 255, 255, .09);
}

.fb-series__card-badge {
  display: inline-block;
  font-family: 'DM Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--brand-mid);
  background: rgba(215, 25, 32, .12);
  border: 1px solid rgba(215, 25, 32, .28);
  border-radius: 100px;
  padding: 4px var(--sp-2);
  width: fit-content;
}

.fb-series__card-header h3 {
  font-size: var(--text-xl);
  font-weight: 800;
  color: #fff;
  margin: var(--sp-2) 0 var(--sp-1);
}

.fb-series__card-header p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, .65);
  line-height: 1.6;
  margin: 0;
}

.fb-series__card-specs {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: rgba(0, 0, 0, .20);
  border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-3);
}

.fb-series__spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}

.fb-series__spec-row:last-child {
  border-bottom: none;
}

.fb-series__spec-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, .50);
}

.fb-series__spec-val {
  font-family: 'DM Mono', monospace;
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, .90);
  text-align: right;
}

.fb-series__card-best {
  background: rgba(215, 25, 32, .08);
  border: 1px solid rgba(215, 25, 32, .20);
  border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-3);
}

.fb-series__best-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brand-mid);
  margin-bottom: 6px;
}

.fb-series__card-best p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, .72);
  line-height: 1.6;
  margin: 0;
}

/* Decision guide */
.fb-series__decision {
  margin-top: var(--sp-7);
}

.fb-series__decision-grid {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.fb-series__decision-item {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--r-lg);
  padding: var(--sp-3) var(--sp-4);
}

.fb-series__decision-num {
  font-family: 'DM Mono', monospace;
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--brand);
  opacity: .60;
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
}

.fb-series__decision-body strong {
  display: block;
  font-size: var(--text-md);
  font-weight: 700;
  color: rgba(255, 255, 255, .90);
  margin-bottom: var(--sp-1);
}

.fb-series__decision-body p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, .60);
  line-height: 1.65;
  margin: 0;
}

.fb-series__decision-highlight {
  color: var(--brand-mid);
  font-weight: 700;
}


/* ============================================================
   S4 — TECHNICAL SPECIFICATIONS
   ============================================================ */

.fb-specs {
  padding: var(--sp-7) var(--sp-5);
}

/* Tab navigation */
.fb-specs__tabs {
  display: flex;
  gap: var(--sp-1);
  border-bottom: 2px solid var(--gray-100);
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-5);
}

.fb-specs__tab {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--gray-600);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  padding: var(--sp-2) var(--sp-3);
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}

.fb-specs__tab:hover {
  color: var(--gray-800);
}

.fb-specs__tab--active {
  color: var(--brand);
  border-bottom-color: var(--brand);
}

.fb-specs__tab:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Panel */
.fb-specs__panel--hidden {
  display: none;
}

/* ============================================================
   S4 — Machine image  ·  完整显示 + 呼吸式动画
   ============================================================ */

.fb-specs__machine-img {
  width: 100%;
  /* 缩小高度，给图片留出上下内边距空间 */
  aspect-ratio: 16 / 6;
  border-radius: var(--r-lg);
  /* overflow hidden 是安全边界 — 即使动画 scale 超出也不会溢出容器 */
  overflow: hidden;
  background: #fff
  border: 1px solid var(--gray-100);
  margin-bottom: var(--sp-4);
  /* 内边距：让图片四边不贴边 */
  padding: var(--sp-3);
  box-sizing: border-box;
}

.fb-specs__machine-img img {
  width: 100%;
  height: 100%;
  /* contain = 完整显示，不裁剪 */
  object-fit: contain;
  object-position: center;
  display: block;
  border-radius: var(--r-md);
  /* 呼吸动画 */
  animation: fb-specs-breathe 6s ease-in-out infinite;
  /* transform-origin 居中，scale 从中心向外扩 */
  transform-origin: center center;
  /* will-change 提示 GPU 合成，避免动画抖动 */
  will-change: transform;
}

/* 呼吸关键帧
   最大 scale(1.04) — 配合容器 padding var(--sp-3)=24px
   四边各有 24px 缓冲，scale 1.04 在 800px 宽容器内
   最大扩张约 16px，不会触碰边框 */
@keyframes fb-specs-breathe {
  0%   { transform: scale(1.00); }
  50%  { transform: scale(1.04); }
  100% { transform: scale(1.00); }
}

/* 用户偏好：减少动效时停止动画 */
@media (prefers-reduced-motion: reduce) {
  .fb-specs__machine-img img {
    animation: none;
  }
}

/* Spec table */
.fb-specs__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.fb-specs__table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.fb-specs__table thead tr {
  background: var(--charcoal);
}

.fb-specs__table thead th {
  font-weight: 700;
  color: #fff;
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
  white-space: nowrap;
}

.fb-specs__table thead th:first-child {
  border-radius: var(--r-md) 0 0 0;
}

.fb-specs__table thead th:last-child {
  border-radius: 0 var(--r-md) 0 0;
}

.fb-specs__table tbody tr {
  border-bottom: 1px solid var(--gray-100);
  transition: background .15s ease;
}

.fb-specs__table tbody tr:hover {
  background: var(--gray-50);
}

.fb-specs__table tbody tr:last-child {
  border-bottom: none;
}

.fb-specs__table tbody td {
  padding: var(--sp-2) var(--sp-3);
  color: var(--gray-600);
  line-height: 1.5;
}

.fb-specs__table tbody td:first-child {
  font-weight: 600;
  color: var(--gray-800);
  white-space: nowrap;
}

.fb-specs__table tbody td[colspan] {
  color: var(--gray-600);
}

/* Note block */
.fb-specs__note {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-3);
  margin-top: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
}

.fb-specs__note svg {
  flex-shrink: 0;
  color: var(--gray-400);
  margin-top: 2px;
}

/* Factory requirements */
.fb-specs__factory {
  margin-top: var(--sp-7);
}

.fb-specs__factory h3 {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--gray-800);
  margin: 0 0 var(--sp-4);
}

.fb-specs__factory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
}

.fb-specs__factory-card {
  display: flex;
  gap: var(--sp-2);
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  padding: var(--sp-3);
  box-shadow: var(--shadow-card);
}

.fb-specs__factory-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--brand-tint);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
}

.fb-specs__factory-body strong {
  display: block;
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 6px;
}

.fb-specs__factory-body p {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
  margin: 0;
}

.fb-specs__inline-link {
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}

.fb-specs__inline-link:hover {
  text-decoration: underline;
}


/* ============================================================
   S5 — WHO THIS IS RIGHT FOR
   ============================================================ */

.fb-who {
  padding: var(--sp-7) var(--sp-5);
}

.fb-who__profiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.fb-who__profile-card {
  background: #fff;
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  padding: var(--sp-4);
  box-shadow: var(--shadow-card);
}

.fb-who__profile-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-2);
}

.fb-who__profile-card--fit .fb-who__profile-icon {
  background: var(--green-bg);
  color: var(--green-fg);
}

.fb-who__profile-card--notfit .fb-who__profile-icon {
  background: var(--amber-bg);
  color: var(--amber-fg);
}

.fb-who__profile-card h3 {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--gray-800);
  margin: 0 0 var(--sp-2);
}

.fb-who__profile-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.fb-who__profile-card li {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
  padding-left: var(--sp-3);
  position: relative;
}

.fb-who__profile-card--fit li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green-fg);
}

.fb-who__profile-card--notfit li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber-fg);
}

.fb-who__inline-link {
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}

.fb-who__inline-link:hover {
  text-decoration: underline;
}

/* Decision table */
.fb-who__decision-table {
  margin-top: var(--sp-6);
}

.fb-who__decision-table h3 {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--gray-800);
  margin: 0 0 var(--sp-3);
}

.fb-who__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.fb-who__table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.fb-who__table thead tr {
  background: var(--charcoal);
}

.fb-who__table thead th {
  font-weight: 700;
  color: #fff;
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
}

.fb-who__table thead th:first-child {
  border-radius: var(--r-md) 0 0 0;
}

.fb-who__table thead th:last-child {
  border-radius: 0 var(--r-md) 0 0;
}

.fb-who__table tbody tr {
  border-bottom: 1px solid var(--gray-100);
  transition: background .15s ease;
}

.fb-who__table tbody tr:hover {
  background: var(--gray-50);
}

.fb-who__table tbody tr:last-child {
  border-bottom: none;
}

.fb-who__table tbody td {
  padding: var(--sp-2) var(--sp-3);
  color: var(--gray-600);
  line-height: 1.5;
}

.fb-who__table tbody td:first-child {
  color: var(--gray-800);
}

.fb-who__table tbody td a {
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}

.fb-who__table tbody td a:hover {
  text-decoration: underline;
}


/* ============================================================
   S7 — BUILD STANDARD
   ============================================================ */

.fb-build {
  padding: var(--sp-7) var(--sp-5);
}

/* Hardware cards */
.fb-build__cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.fb-build__card {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}

.fb-build__card:hover {
  border-color: var(--brand);
  background: rgba(255, 255, 255, .09);
  transform: translateY(-3px);
}

.fb-build__part-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: rgba(0, 0, 0, .30);
}

.fb-build__part-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}

.fb-build__card:hover .fb-build__part-img img {
  transform: scale(1.05);
}

.fb-build__card-icon {
  width: 40px;
  height: 40px;
  background: rgba(215, 25, 32, .15);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-mid);
  margin: var(--sp-3) var(--sp-3) 0;
}

.fb-build__card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: rgba(255, 255, 255, .90);
  margin: var(--sp-2) var(--sp-3) 0;
}

.fb-build__card p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, .55);
  line-height: 1.6;
  margin: var(--sp-1) var(--sp-3) var(--sp-3);
}

/* FAT block */
.fb-build__fat {
  display: grid;
  grid-template-columns: 480px 1fr;
  gap: var(--sp-6);
  align-items: start;
  margin-top: var(--sp-7);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.fb-build__fat-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: rgba(0, 0, 0, .30);
}

.fb-build__fat-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.fb-build__fat-body {
  padding: var(--sp-5) var(--sp-5) var(--sp-5) 0;
}

.fb-build__fat-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .10em;
  color: var(--brand-mid);
  background: rgba(215, 25, 32, .12);
  border: 1px solid rgba(215, 25, 32, .28);
  border-radius: 100px;
  padding: 4px var(--sp-2);
  margin-bottom: var(--sp-2);
}

.fb-build__fat-body h3 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin: 0 0 var(--sp-3);
}

.fb-build__fat-body p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, .65);
  line-height: 1.7;
  margin: 0 0 var(--sp-2);
}

/* Dark-surface credential items (S7 is .section-dark — .cred-item forbidden) */
.fb-build__fat-creds {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.fb-build__cred-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.fb-build__cred-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, .08);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-mid);
}

.fb-build__cred-item strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: rgba(255, 255, 255, .90);
}

.fb-build__cred-item span {
  display: block;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, .45);
}


/* ============================================================
   S9 — RELATED MACHINES
   ============================================================ */

.fb-related {
  padding: var(--sp-7) var(--sp-5);
}

.fb-related__cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.fb-related__card {
  background: #fff;
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  overflow: hidden;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  display: flex;
  flex-direction: column;
}

.fb-related__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--brand);
}

.fb-related__card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--gray-50);
}

.fb-related__card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}

.fb-related__card:hover .fb-related__card-img img {
  transform: scale(1.04);
}

.fb-related__card-body {
  padding: var(--sp-3);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.fb-related__card-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brand);
  background: var(--brand-tint);
  border-radius: 100px;
  padding: 3px var(--sp-2);
  margin-bottom: var(--sp-1);
}

.fb-related__card-body h3 {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--gray-800);
  margin: 0 0 var(--sp-1);
}

.fb-related__card-body p {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
  margin: 0 0 var(--sp-2);
  flex: 1;
}

.link-arrow {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--brand);
  margin-top: auto;
}


/* ============================================================
   S10 — FAQ
   ============================================================ */

.fb-faq {
  padding: var(--sp-7) var(--sp-5);
}

.fb-faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  margin-top: var(--sp-6);
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

/* Remove native browser marker */
summary {
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}

.fb-faq__item {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color .2s ease;
}

.fb-faq__item[open] {
  border-color: rgba(215, 25, 32, .35);
}

.fb-faq__q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  cursor: pointer;
  font-size: var(--text-base);
  font-weight: 600;
  color: rgba(255, 255, 255, .90);
  line-height: 1.5;
  transition: color .2s ease;
  user-select: none;
}

.fb-faq__q:hover {
  color: #fff;
}

.fb-faq__q:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.fb-faq__chevron {
  flex-shrink: 0;
  color: var(--brand-mid);
  transition: transform .25s ease;
}

.fb-faq__item[open] .fb-faq__chevron {
  transform: rotate(180deg);
}

.fb-faq__a {
  padding: 0 var(--sp-4) var(--sp-3);
  border-top: 1px solid rgba(255, 255, 255, .06);
}

.fb-faq__a p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, .60);
  line-height: 1.75;
  margin: var(--sp-2) 0 0;
}

.fb-faq__a p + p {
  margin-top: var(--sp-2);
}


/* ============================================================
   S11 — FINAL CTA
   ============================================================ */

.fb-cta {
  padding: var(--sp-8) var(--sp-5);
}

.fb-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--sp-5);
}

.fb-cta__content {
  max-width: 640px;
}

.fb-cta__content h2 {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin: var(--sp-2) 0 var(--sp-3);
}

.fb-cta__content h2 em {
  font-style: normal;
  color: var(--brand-mid);
}

.fb-cta__content p {
  font-size: var(--text-md);
  color: rgba(255, 255, 255, .65);
  line-height: 1.7;
  margin: 0;
}

.fb-cta__actions {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  justify-content: center;
}


/* ============================================================
   TAB SWITCH — JavaScript hook
   ============================================================ */

/* JS adds/removes .fb-specs__tab--active and .fb-specs__panel--hidden */


/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 960px) {

  .fb-hero__title {
    font-size: var(--text-3xl);
  }

  .fb-hero__trust {
    gap: var(--sp-3);
  }

  .fb-produces__grid {
    grid-template-columns: 1fr;
  }

  .fb-series__cards {
    grid-template-columns: 1fr;
  }

  .fb-specs__factory-grid {
    grid-template-columns: 1fr;
  }

  .fb-who__profiles {
    grid-template-columns: 1fr;
  }

  .fb-build__cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .fb-build__fat {
    grid-template-columns: 1fr;
  }

  .fb-build__fat-body {
    padding: var(--sp-4);
  }

  .fb-related__cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .fb-cta__content h2 {
    font-size: var(--text-2xl);
  }

}

@media (max-width: 600px) {

  .fb-hero__title {
    font-size: var(--text-2xl);
  }

  .fb-hero__trust {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .fb-hero__divider {
    display: none;
  }

  .fb-hero__cta-group {
    flex-direction: column;
  }

  .fb-hero__cta-group .btn {
    width: 100%;
    text-align: center;
  }

  .fb-build__cards {
    grid-template-columns: 1fr;
  }

  .fb-related__cards {
    grid-template-columns: 1fr;
  }

  .fb-series__decision-item {
    flex-direction: column;
    gap: var(--sp-1);
  }

  .fb-cta__actions {
    flex-direction: column;
    width: 100%;
  }

  .fb-cta__actions .btn {
    width: 100%;
    text-align: center;
  }

}


/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  .fb-produces__col,
  .fb-series__card,
  .fb-build__card,
  .fb-related__card,
  .fb-faq__item,
  .fb-faq__chevron,
  .fb-specs__tab {
    transition: none;
  }
}

@keyframes cb-hero-breathe {
  0%   { transform: scale(1.00); }
  50%  { transform: scale(1.06); }
  100% { transform: scale(1.00); }
}