/*
THESIS: 以“采购档案夹”式的清晰层级证明制造能力，拒绝零售商城式促销堆叠。
OWN-WORLD: 森林绿、暖象牙、沙金、编辑感衬线标题、细线分隔与克制圆角。
STORY: 访客先识别产品与制造定位，再验证能力与证据，最后提交结构化 RFQ。
FIRST VIEWPORT: 圆角导航悬于暖白页面，产品菜单展开时以真实产品缩略图展示目录深度，询盘按钮始终明确。
FORM: 延续用户确认的首页视觉；seed key: pinned-bluegreencup-home-2026。
FINISH: unreviewed and undocumented is unfinished; this build ends with the finish review, the verdict, and DESIGN.md
*/

:root {
  --bgc-ivory: #f4f0e4;
  --bgc-paper: #fbf8ef;
  --bgc-ink: #123d31;
  --bgc-dark: #0d2d25;
  --bgc-moss: #466352;
  --bgc-sage: #8fa38c;
  --bgc-sand: #d4c2a6;
  --bgc-white: #fffdf7;
  --bgc-line: rgba(18, 61, 49, 0.16);
  --bgc-danger: #9e2f2f;
  --bgc-success: #246b4d;
  --bgc-shadow: 0 24px 70px rgba(23, 54, 44, 0.12);
  --bgc-shadow-small: 0 12px 34px rgba(23, 54, 44, 0.1);
  --bgc-radius: 16px;
  --bgc-radius-large: 24px;
  --bgc-container: 1200px;
  --bgc-reading: 760px;
  --bgc-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --bgc-font-display: Iowan Old Style, Baskerville, Times New Roman, serif;
  --bgc-font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body.bgc-theme {
  background: var(--bgc-ivory);
  color: var(--bgc-ink);
  font-family: var(--bgc-font-body);
  font-size: 16px;
  line-height: 1.65;
  margin: 0;
  overflow-x: clip;
}

body.bgc-theme ::selection {
  background: var(--bgc-sand);
  color: var(--bgc-dark);
}

body.bgc-theme *,
body.bgc-theme *::before,
body.bgc-theme *::after {
  box-sizing: border-box;
}

body.bgc-theme a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

body.bgc-theme :focus-visible {
  outline: 3px solid var(--bgc-sand);
  outline-offset: 4px;
}

.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute !important;
  white-space: nowrap;
  width: 1px;
}

.bgc-skip-link {
  background: var(--bgc-white);
  border-radius: 0 0 10px 10px;
  color: var(--bgc-ink) !important;
  font-weight: 800;
  left: 1rem;
  padding: 0.75rem 1rem;
  position: fixed;
  top: -100px;
  transition: top 160ms ease-out;
  z-index: 10001;
}

.bgc-skip-link:focus {
  top: 0;
}

.bgc-container {
  margin-inline: auto;
  max-width: var(--bgc-container);
  padding-inline: clamp(1rem, 3vw, 2rem);
  width: 100%;
}

.bgc-main {
  min-height: 55dvh;
  padding-block: clamp(2.5rem, 7vw, 6.5rem);
}

.bgc-home-main {
  padding: 0;
}

.bgc-header {
  background: linear-gradient(to bottom, rgba(13, 45, 37, 0.98) 0 7px, transparent 7px);
  left: 0;
  padding: 22px clamp(1rem, 2.2vw, 2.25rem) 0;
  position: relative;
  right: 0;
  top: 0;
  z-index: 1000;
}

.bgc-nav-shell {
  align-items: center;
  background: rgba(244, 240, 228, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  display: flex;
  gap: clamp(1.5rem, 4vw, 4.5rem);
  justify-content: space-between;
  margin-inline: auto;
  max-width: 1500px;
  min-height: 72px;
  padding: 0.65rem 0.75rem 0.65rem 1.5rem;
  position: relative;
  width: 100%;
}

.bgc-brand {
  display: inline-flex;
  flex: 0 0 auto;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
}

.bgc-brand strong {
  font-family: var(--bgc-font-display);
  font-size: clamp(1.45rem, 2vw, 1.82rem);
  font-weight: 500;
  letter-spacing: -0.025em;
}

.bgc-brand > span {
  font-size: 0.59rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  margin-top: 0.48rem;
}

.bgc-brand .custom-logo-link {
  display: block;
}

.bgc-brand .custom-logo {
  display: block;
  height: auto;
  max-height: 48px;
  width: auto;
}

.bgc-primary-nav {
  align-items: center;
  display: flex;
  flex: 1 1 auto;
  gap: clamp(0.55rem, 1.5vw, 1.65rem);
  justify-content: flex-end;
}

.bgc-menu-list {
  align-items: center;
  display: flex;
  gap: clamp(0.55rem, 1.5vw, 1.65rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.bgc-menu-list a,
.bgc-products-toggle {
  align-items: center;
  background: none;
  border: 0;
  color: var(--bgc-ink);
  cursor: pointer;
  display: inline-flex;
  font: 720 0.79rem/1.2 var(--bgc-font-body);
  min-height: 44px;
  padding: 0.5rem 0;
  text-decoration: none;
  white-space: nowrap;
}

.bgc-products-toggle {
  gap: 0.45rem;
}

.bgc-products-toggle > span {
  font-size: 1.2rem;
  transform-origin: center;
  transition: transform 220ms var(--bgc-ease);
}

.bgc-products-toggle[aria-expanded="true"] > span {
  transform: rotate(180deg);
}

.bgc-menu-toggle {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 50%;
  color: var(--bgc-ink);
  cursor: pointer;
  display: none;
  height: 46px;
  justify-content: center;
  width: 46px;
}

.bgc-menu-lines,
.bgc-menu-lines::before,
.bgc-menu-lines::after {
  background: currentColor;
  display: block;
  height: 2px;
  position: relative;
  transition: transform 200ms var(--bgc-ease), opacity 160ms ease-out;
  width: 21px;
}

.bgc-menu-lines::before,
.bgc-menu-lines::after {
  content: "";
  left: 0;
  position: absolute;
}

.bgc-menu-lines::before { top: -6px; }
.bgc-menu-lines::after { top: 6px; }
.bgc-menu-toggle[aria-expanded="true"] .bgc-menu-lines { background: transparent; }
.bgc-menu-toggle[aria-expanded="true"] .bgc-menu-lines::before { top: 0; transform: rotate(45deg); }
.bgc-menu-toggle[aria-expanded="true"] .bgc-menu-lines::after { top: 0; transform: rotate(-45deg); }

.bgc-nav-dropdown {
  position: relative;
}

.bgc-mega-menu {
  background: var(--bgc-paper);
  border: 1px solid var(--bgc-line);
  border-radius: var(--bgc-radius-large);
  box-shadow: var(--bgc-shadow);
  display: grid;
  gap: 2rem;
  grid-template-columns: 255px minmax(440px, 1fr);
  left: 50%;
  min-width: min(720px, calc(100vw - 2rem));
  padding: 1.5rem;
  position: absolute;
  top: calc(100% + 18px);
  transform: translateX(-42%);
  transform-origin: 40% 0;
}

.bgc-mega-menu[hidden] {
  display: none;
}

.bgc-mega-menu.is-opening {
  animation: bgc-menu-enter 340ms var(--bgc-ease) both;
}

@keyframes bgc-menu-enter {
  from { clip-path: inset(0 0 100% 0 round 24px); opacity: 0.35; }
  to { clip-path: inset(0 0 0 0 round 24px); opacity: 1; }
}

.bgc-mega-intro {
  background: var(--bgc-dark);
  border-radius: var(--bgc-radius);
  color: var(--bgc-white) !important;
  display: flex;
  flex-direction: column;
  min-height: 255px;
  overflow: hidden;
  padding: 1.4rem;
  position: relative;
  text-decoration: none;
}

.bgc-mega-intro::after {
  background: linear-gradient(180deg, transparent 28%, rgba(13, 45, 37, 0.1) 48%, rgba(13, 45, 37, 0.96) 82%);
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
  z-index: 1;
}

.bgc-mega-label,
.bgc-mega-intro strong,
.bgc-mega-action {
  position: relative;
  z-index: 2;
}

.bgc-mega-label {
  color: var(--bgc-sand);
  font-size: 0.67rem;
  font-weight: 850;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.bgc-mega-intro strong {
  font-family: var(--bgc-font-display);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.03;
  margin-top: 1rem;
  max-width: 10ch;
}

.bgc-mega-action {
  align-items: center;
  display: inline-flex;
  font-size: 0.77rem;
  font-weight: 800;
  gap: 0.5rem;
  margin-top: auto;
}

.bgc-mega-action > span {
  color: var(--bgc-sand);
  font-size: 1.2rem;
  transition: transform 180ms var(--bgc-ease);
}

.bgc-mega-media {
  bottom: 0;
  height: 108px;
  pointer-events: none;
  position: absolute;
  right: -10px;
  width: 154px;
}

.bgc-mega-media img {
  border: 2px solid rgba(255, 253, 247, 0.72);
  border-radius: 10px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.28);
  height: 78px;
  object-fit: cover;
  position: absolute;
  right: 0;
  top: 18px;
  transform-origin: 90% 100%;
  transition: transform 420ms var(--bgc-ease), filter 240ms ease-out;
  width: 106px;
}

.bgc-mega-media img:nth-child(1) { filter: saturate(0.82) brightness(0.78); transform: translate(-46px, 11px) rotate(-8deg); }
.bgc-mega-media img:nth-child(2) { filter: saturate(0.9) brightness(0.88); transform: translate(-23px, 4px) rotate(-3deg); }
.bgc-mega-media img:nth-child(3) { transform: translate(0, 0) rotate(3deg); }

.bgc-mega-links {
  align-self: stretch;
  display: grid;
  gap: 0 1.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bgc-mega-links a {
  align-items: center;
  border-bottom: 1px solid var(--bgc-line);
  display: flex;
  font-size: 0.88rem;
  font-weight: 720;
  min-height: 59px;
  text-decoration: none;
  transition: color 160ms ease-out, transform 180ms var(--bgc-ease);
}

.bgc-button {
  align-items: center;
  background: var(--bgc-ink);
  border: 1px solid var(--bgc-ink);
  border-radius: 999px;
  color: var(--bgc-white) !important;
  cursor: pointer;
  display: inline-flex;
  font-size: 0.76rem;
  font-weight: 850;
  justify-content: center;
  letter-spacing: 0.08em;
  min-height: 50px;
  padding: 0.8rem 1.45rem;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 180ms ease-out, color 180ms ease-out, transform 160ms var(--bgc-ease), box-shadow 180ms ease-out;
}

.bgc-button-small {
  min-height: 48px;
  padding-inline: 1.4rem;
  white-space: nowrap;
}

.bgc-button-light {
  background: var(--bgc-sand);
  border-color: var(--bgc-sand);
  color: var(--bgc-dark) !important;
}

.bgc-text-link {
  color: var(--bgc-ink) !important;
  font-weight: 800;
  text-decoration: underline;
}

.bgc-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.4rem;
  margin-top: 2rem;
}

.bgc-breadcrumbs {
  font-size: 0.77rem;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.bgc-breadcrumbs ol {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bgc-breadcrumbs li:not(:last-child)::after {
  color: var(--bgc-sage);
  content: "/";
  margin-left: 0.5rem;
}

.bgc-breadcrumbs a { color: var(--bgc-moss) !important; }

.bgc-page-header,
.bgc-article-header {
  max-width: 870px;
  padding-bottom: clamp(2.5rem, 6vw, 5.5rem);
}

.bgc-page-header h1,
.bgc-article-header h1,
.bgc-product-copy h1,
.bgc-error-page h1 {
  color: var(--bgc-dark);
  font-family: var(--bgc-font-display);
  font-size: clamp(2.6rem, 6vw, 5.65rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.bgc-page-deck {
  color: var(--bgc-moss);
  font-size: clamp(1.05rem, 1.5vw, 1.24rem);
  line-height: 1.58;
  margin: 1.5rem 0 0;
  max-width: 68ch;
}

.bgc-context-label,
.bgc-topic-link {
  color: var(--bgc-moss) !important;
  display: inline-block;
  font-size: 0.69rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  margin-bottom: 1.25rem;
  text-decoration: none;
}

.bgc-entry-content {
  color: #244b40;
  font-size: 1.04rem;
  min-width: 0;
}

.bgc-entry-content > * {
  max-width: min(100%, 75ch);
}

.bgc-entry-content h2,
.bgc-entry-content h3,
.bgc-article-next h2,
.bgc-proof-aside h2,
.bgc-contact-grid aside h2 {
  color: var(--bgc-dark);
  font-family: var(--bgc-font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.12;
  margin-top: 2.6em;
  text-wrap: balance;
}

.bgc-entry-content h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
.bgc-entry-content h3 { font-size: clamp(1.45rem, 2.5vw, 2rem); }

.bgc-entry-content img {
  border-radius: var(--bgc-radius);
  height: auto;
  max-width: 100%;
}

.bgc-entry-content table {
  border-collapse: collapse;
  display: block;
  max-width: 100%;
  overflow-x: auto;
  width: max-content;
}

.bgc-entry-content th,
.bgc-entry-content td {
  border-bottom: 1px solid var(--bgc-line);
  padding: 0.9rem 1rem;
  text-align: left;
}

.bgc-reading-shell { max-width: 1120px; }
.bgc-article { margin-inline: auto; max-width: var(--bgc-reading); }
.bgc-article-header { padding-bottom: 2.5rem; }
.bgc-article-header h1 { font-size: clamp(2.7rem, 6vw, 5.1rem); }

.bgc-article-meta {
  color: var(--bgc-moss);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.78rem;
  gap: 0.5rem 1.25rem;
  margin-top: 1.5rem;
}

.bgc-article-cover {
  margin: 0 0 clamp(2.5rem, 6vw, 5rem);
}

.bgc-article-cover img {
  aspect-ratio: 16 / 9;
  border-radius: var(--bgc-radius-large);
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
}

.bgc-article-next,
.bgc-proof-aside,
.bgc-contact-grid aside {
  background: var(--bgc-dark);
  border-radius: var(--bgc-radius);
  color: var(--bgc-white);
  margin-top: clamp(3rem, 7vw, 6rem);
  padding: clamp(1.5rem, 4vw, 2.6rem);
}

.bgc-article-next h2,
.bgc-proof-aside h2,
.bgc-contact-grid aside h2 {
  color: var(--bgc-white);
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  margin: 0 0 1rem;
}

.bgc-resource-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.bgc-resource-card {
  border-top: 1px solid var(--bgc-line);
  min-width: 0;
  padding: 1.25rem;
}

.bgc-resource-media {
  aspect-ratio: 4 / 3;
  background: var(--bgc-paper);
  border-radius: var(--bgc-radius);
  display: block;
  overflow: hidden;
}

.bgc-resource-media img {
  height: 100%;
  object-fit: cover;
  transition: transform 520ms var(--bgc-ease);
  width: 100%;
}

.bgc-resource-card time {
  color: var(--bgc-moss);
  display: block;
  font-size: 0.72rem;
  margin-top: 1.15rem;
}

.bgc-resource-card h2,
.bgc-search-result h2 {
  font-family: var(--bgc-font-display);
  font-size: 1.65rem;
  line-height: 1.1;
  margin: 0.8rem 0;
}

.bgc-resource-card h2 a,
.bgc-search-result h2 a { text-decoration: none; }
.bgc-resource-card p,
.bgc-search-result p { color: var(--bgc-moss); }

.bgc-product-hero {
  align-items: center;
  display: grid;
  gap: clamp(2rem, 6vw, 5rem);
  grid-template-columns: minmax(0, 0.88fr) minmax(380px, 1.12fr);
  margin-bottom: clamp(4rem, 10vw, 8rem);
}

.bgc-product-copy {
  min-width: 0;
}

.bgc-product-image {
  background: var(--bgc-paper);
  border-radius: var(--bgc-radius-large);
  margin: 0;
  overflow: hidden;
}

.bgc-product-image img {
  aspect-ratio: 4 / 3;
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
}

.bgc-proof-layout,
.bgc-contact-grid {
  align-items: start;
  display: grid;
  gap: clamp(2.5rem, 7vw, 7rem);
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.46fr);
}

.bgc-proof-aside,
.bgc-contact-grid aside {
  margin-top: 0;
  position: sticky;
  top: 2rem;
}

.bgc-contact-grid aside ul { margin: 1.5rem 0 0; padding-left: 1.2rem; }
.bgc-contact-grid aside li + li { margin-top: 0.55rem; }

.bgc-form-slot input,
.bgc-form-slot select,
.bgc-form-slot textarea,
.bgc-empty-state input[type="search"] {
  background: var(--bgc-white);
  border: 1px solid var(--bgc-line);
  border-radius: 10px;
  color: var(--bgc-ink);
  font: inherit;
  min-height: 50px;
  padding: 0.8rem 0.95rem;
  width: 100%;
}

.bgc-form-slot label { color: var(--bgc-dark); font-size: 0.84rem; font-weight: 750; }
.bgc-form-slot textarea { min-height: 160px; resize: vertical; }
.bgc-form-slot :invalid:not(:placeholder-shown) { border-color: var(--bgc-danger); }

.bgc-empty-state,
.bgc-error-page {
  background: var(--bgc-paper);
  border-radius: var(--bgc-radius-large);
  padding: clamp(2rem, 6vw, 5rem);
}

.bgc-error-code {
  color: var(--bgc-sand);
  font-family: var(--bgc-font-display);
  font-size: clamp(5rem, 16vw, 13rem);
  line-height: 0.72;
  margin: 0 0 2rem;
}

.bgc-footer {
  background: var(--bgc-dark);
  color: rgba(255, 253, 247, 0.8);
  padding: clamp(3rem, 7vw, 6rem) max(1rem, calc((100vw - var(--bgc-container)) / 2));
}

.bgc-footer-lead {
  align-items: end;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  gap: 2rem;
  justify-content: space-between;
  padding: 0 clamp(1rem, 3vw, 2rem) clamp(2.5rem, 6vw, 5rem);
}

.bgc-footer-kicker {
  color: var(--bgc-sand);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.bgc-footer-lead h2 {
  color: var(--bgc-white);
  font-family: var(--bgc-font-display);
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 0.98;
  margin: 0;
  max-width: 15ch;
}

.bgc-footer-grid {
  display: grid;
  gap: clamp(2rem, 7vw, 7rem);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr) minmax(180px, 0.55fr);
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 3vw, 2rem);
}

.bgc-footer h3 {
  color: var(--bgc-white);
  font: 850 0.7rem/1.2 var(--bgc-font-body);
  letter-spacing: 0.16em;
  margin: 0 0 1.2rem;
  text-transform: uppercase;
}

.bgc-footer address { font-style: normal; max-width: 44ch; }
.bgc-footer-contact a,
.bgc-footer-company a { color: rgba(255, 253, 247, 0.8) !important; display: block; margin-top: 0.8rem; text-decoration: none; }
.bgc-footer-company ul { list-style: none; margin: 0; padding: 0; }
.bgc-proof-note { color: var(--bgc-sand); font-size: 0.78rem; max-width: 48ch; }

.bgc-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  font-size: 0.68rem;
  justify-content: space-between;
  padding: 1.5rem clamp(1rem, 3vw, 2rem) 0;
}

@media (hover: hover) and (pointer: fine) {
  .bgc-menu-list a:hover,
  .bgc-products-toggle:hover,
  .bgc-mega-links a:hover { color: var(--bgc-moss); }
  .bgc-mega-links a:hover { transform: translateX(4px); }
  .bgc-mega-intro:hover .bgc-mega-action > span { transform: translateX(5px); }
  .bgc-mega-intro:hover .bgc-mega-media img:nth-child(1) { filter: saturate(1) brightness(0.9); transform: translate(-58px, 5px) rotate(-12deg); }
  .bgc-mega-intro:hover .bgc-mega-media img:nth-child(2) { filter: saturate(1) brightness(0.98); transform: translate(-28px, -4px) rotate(-4deg); }
  .bgc-mega-intro:hover .bgc-mega-media img:nth-child(3) { transform: translate(3px, -7px) rotate(5deg); }
  .bgc-button:hover { background: var(--bgc-sand); border-color: var(--bgc-sand); box-shadow: var(--bgc-shadow-small); color: var(--bgc-dark) !important; transform: translateY(-2px); }
  .bgc-button-light:hover { background: var(--bgc-white); border-color: var(--bgc-white); }
  .bgc-resource-card:hover .bgc-resource-media img { transform: scale(1.035); }
  .bgc-footer a:hover { color: var(--bgc-white) !important; }
}

.bgc-button:active { transform: scale(0.98); }

@media (max-width: 1180px) {
  .bgc-primary-nav { gap: 0.75rem; }
  .bgc-menu-list { gap: 0.75rem; }
  .bgc-menu-list a,
  .bgc-products-toggle { font-size: 0.73rem; }
  .bgc-mega-menu { left: -160px; transform: none; }
}

@media (max-width: 980px) {
  .bgc-header { padding-top: 14px; }
  .bgc-nav-shell { border-radius: 24px; min-height: 66px; padding-left: 1rem; }
  .bgc-menu-toggle { display: inline-flex; }
  .bgc-primary-nav {
    align-items: stretch;
    background: var(--bgc-paper);
    border: 1px solid var(--bgc-line);
    border-radius: var(--bgc-radius);
    box-shadow: var(--bgc-shadow);
    display: none;
    flex-direction: column;
    left: 0;
    padding: 1rem;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
  }
  .bgc-primary-nav.is-open { display: flex; }
  .bgc-menu-list { align-items: stretch; flex-direction: column; gap: 0; }
  .bgc-menu-list a,
  .bgc-products-toggle { border-bottom: 1px solid var(--bgc-line); font-size: 0.82rem; justify-content: space-between; min-height: 50px; width: 100%; }
  .bgc-mega-menu { border: 0; box-shadow: none; gap: 0; grid-template-columns: 1fr; left: auto; min-width: 0; padding: 0.75rem 0; position: static; transform: none; }
  .bgc-mega-intro { min-height: 210px; }
  .bgc-mega-links { grid-template-columns: 1fr; }
  .bgc-mega-links a { min-height: 50px; }
  .bgc-product-hero,
  .bgc-proof-layout,
  .bgc-contact-grid { grid-template-columns: 1fr; }
  .bgc-product-image { grid-row: 1; }
  .bgc-proof-aside,
  .bgc-contact-grid aside { position: static; }
  .bgc-resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  .bgc-header { padding-inline: 0.75rem; }
  .bgc-brand strong { font-size: 1.25rem; }
  .bgc-brand > span { font-size: 0.5rem; letter-spacing: 0.15em; }
  .bgc-menu-toggle { flex: 0 0 46px; }
  .bgc-nav-shell { gap: 0.5rem; }
  .bgc-main { padding-block: 2.25rem 4rem; }
  .bgc-page-header h1,
  .bgc-article-header h1,
  .bgc-product-copy h1,
  .bgc-error-page h1 { font-size: clamp(2.35rem, 11vw, 3.35rem); }
  .bgc-resource-grid { grid-template-columns: 1fr; }
  .bgc-resource-card { padding-inline: 0; }
  .bgc-footer-lead { align-items: start; flex-direction: column; }
  .bgc-footer-grid { grid-template-columns: 1fr; }
  .bgc-footer-bottom { flex-direction: column; gap: 0.45rem; }
  .bgc-actions { align-items: stretch; flex-direction: column; }
  .bgc-actions .bgc-button { width: 100%; }
  .bgc-entry-content table {
    display: table;
    table-layout: fixed;
    width: 100%;
  }
  .bgc-entry-content th,
  .bgc-entry-content td {
    font-size: clamp(0.78rem, 3.8vw, 0.95rem);
    hyphens: auto;
    overflow-wrap: break-word;
    padding: 0.75rem 0.4rem;
    vertical-align: top;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .bgc-mega-media img:nth-child(1) { transform: translate(-46px, 11px) rotate(-8deg); }
  .bgc-mega-media img:nth-child(2) { transform: translate(-23px, 4px) rotate(-3deg); }
  .bgc-mega-media img:nth-child(3) { transform: translate(0, 0) rotate(3deg); }
}