/* ==========================================================================
   ASIAN INTERNATIONAL TECHNOLOGIES LTD.
   Official Corporate Design System (2026) — Enterprise Bilingual RFQ Portal
   "Across markets. Alongside you." / 跨越市场，与您同行
   ========================================================================== */

:root {
  --color-asian-red: #C9211E;
  --color-asian-red-dark: #A91415;
  --color-asian-red-subtle: rgba(201, 33, 30, 0.08);
  --color-charcoal: #121C26;
  --color-charcoal-dark: #0B0F19;
  --color-charcoal-light: #1E2B38;
  --color-warm-canvas: #F8F4EC;
  --color-warm-sand: #F1EBE1;
  --color-horizon-amber: #C99B45;
  --color-slate-muted: #64707A;
  --color-border: #E2DBD0;
  --color-border-dark: #2B3847;
  --color-card-bg: #FFFFFF;
  --color-text-main: #1D2939;
  --color-text-secondary: #475467;
  --color-badge-bg: #F4EFE6;
  --shadow-sm: 0 1px 3px rgba(18, 28, 38, 0.05);
  --shadow-md: 0 4px 12px rgba(18, 28, 38, 0.08);
  --shadow-lg: 0 12px 32px rgba(18, 28, 38, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-warm-canvas);
  color: var(--color-text-main);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Nav */
.site-header {
  background-color: var(--color-charcoal-dark);
  color: #FFFFFF;
  border-bottom: 2px solid var(--color-asian-red);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  gap: 16px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #FFFFFF;
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #FFFFFF;
  line-height: 1.2;
}

.brand-sub {
  font-size: 11px;
  color: var(--color-horizon-amber);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  background-color: var(--color-charcoal);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: #94A3B8;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.lang-btn.active, .lang-btn:hover {
  background-color: var(--color-asian-red);
  color: #FFFFFF;
}

/* Quick Action Top Button */
.btn-action-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #25D366;
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-action-top:hover {
  background-color: #1EBE5D;
}

/* Hero Dossier Banner */
.hero-dossier {
  background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-charcoal-dark) 100%);
  color: #FFFFFF;
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--color-border);
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(201, 33, 30, 0.2);
  border: 1px solid var(--color-asian-red);
  color: #FFA5A2;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 14px;
  color: #CBD5E1;
  max-width: 860px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.hub-corridors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.hub-chip {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 12px;
  color: #E2E8F0;
  padding: 5px 12px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.hub-chip span.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10B981;
}

/* Platform Brand Tabs */
.tabs-nav-wrapper {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 65px;
  z-index: 900;
}

.tabs-nav {
  display: flex;
  overflow-x: auto;
  gap: 8px;
  padding: 10px 20px;
  scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
  display: none;
}

.brand-tab {
  background: var(--color-warm-sand);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tab:hover {
  background: #E8E1D5;
  color: var(--color-text-main);
}

.brand-tab.active {
  background: var(--color-charcoal);
  color: #FFFFFF;
  border-color: var(--color-charcoal);
  box-shadow: var(--shadow-sm);
}

.brand-tab.active .tab-tag {
  background: var(--color-asian-red);
  color: #FFFFFF;
}

.tab-tag {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: #E2DBD0;
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* RFQ Container */
.rfq-content-area {
  padding: 30px 0 60px;
}

.rfq-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 30px;
  overflow: hidden;
  display: none;
}

.rfq-card.active {
  display: block;
}

/* RFQ Header Box */
.rfq-header-box {
  background: var(--color-charcoal);
  color: #FFFFFF;
  padding: 24px 28px;
  border-bottom: 3px solid var(--color-asian-red);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.rfq-title-group h2 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.rfq-ref-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-horizon-amber);
  font-weight: 600;
}

.rfq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-rfq {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-wechat {
  background-color: #07C160;
  color: #FFFFFF;
}

.btn-wechat:hover {
  background-color: #06AD56;
}

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

.btn-whatsapp:hover {
  background-color: #1EBE5D;
}

.btn-print {
  background-color: #334155;
  color: #FFFFFF;
}

.btn-print:hover {
  background-color: #475569;
}

/* Key Highlights Cards */
.rfq-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 24px 28px;
  background-color: #FAFAFA;
  border-bottom: 1px solid var(--color-border);
}

.stat-pill {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-asian-red);
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-slate-muted);
  font-weight: 700;
  margin-bottom: 4px;
}

.stat-val {
  font-size: 16px;
  font-weight: 800;
  color: var(--color-charcoal);
  line-height: 1.3;
}

.stat-desc {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 3px;
}

/* Procurement Terms Section */
.rfq-section {
  padding: 24px 28px;
  border-bottom: 1px solid var(--color-border);
}

.rfq-section-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-left: 3px solid var(--color-asian-red);
  padding-left: 10px;
}

.terms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.term-item {
  background: var(--color-warm-sand);
  border: 1px solid var(--color-border);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
}

.term-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.term-text {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Detailed BOM Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.bom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.bom-table th {
  background-color: var(--color-charcoal);
  color: #FFFFFF;
  padding: 12px 14px;
  font-weight: 700;
  font-size: 12px;
  border: 1px solid var(--color-border-dark);
  white-space: nowrap;
}

.bom-table td {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

.bom-table tbody tr:nth-child(even) {
  background-color: #FAFAFA;
}

.bom-table tbody tr:hover {
  background-color: #FFF8F7;
}

.item-index {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-asian-red);
  text-align: center;
}

.spec-primary {
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 4px;
}

.spec-detail {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.spec-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-asian-red-subtle);
  color: var(--color-asian-red);
  margin-top: 4px;
}

.qty-cell {
  font-weight: 700;
  font-family: var(--font-mono);
  text-align: center;
  white-space: nowrap;
}

/* WeChat Raw Text Drawer */
.wechat-box {
  background-color: #F3F4F6;
  border: 1px dashed #9CA3AF;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-top: 20px;
}

.wechat-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.wechat-box-title {
  font-size: 13px;
  font-weight: 700;
  color: #374151;
  display: flex;
  align-items: center;
  gap: 6px;
}

.wechat-pre {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 4px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #1F2937;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 220px;
  overflow-y: auto;
}

/* Footer Liaison */
.site-footer {
  background-color: var(--color-charcoal-dark);
  color: #FFFFFF;
  padding: 40px 0;
  border-top: 3px solid var(--color-asian-red);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-horizon-amber);
  margin-bottom: 12px;
  letter-spacing: 0.03em;
}

.footer-col p {
  font-size: 13px;
  color: #94A3B8;
  line-height: 1.6;
  margin-bottom: 8px;
}

.footer-col a {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
}

.footer-col a:hover {
  color: #FFA5A2;
}

.copy-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--color-charcoal);
  color: #FFFFFF;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border-left: 4px solid #10B981;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 700;
  display: none;
  z-index: 2000;
}

/* Language Visibility Classes */
body.lang-zh .en-only { display: none !important; }
body.lang-en .zh-only { display: none !important; }
body.lang-bi .zh-only, body.lang-bi .en-only { display: block !important; }

/* Responsive Media Queries */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-controls {
    width: 100%;
    justify-content: space-between;
  }
  .hero-title {
    font-size: 22px;
  }
  .rfq-header-box {
    flex-direction: column;
    align-items: flex-start;
  }
  .rfq-actions {
    width: 100%;
  }
  .btn-rfq {
    flex: 1;
    justify-content: center;
  }
  .tabs-nav {
    padding: 8px 12px;
  }
}

/* ==========================================================================
   PDF DOWNLOADS, BLUEPRINT & METRIC EXTENSIONS
   ========================================================================== */
.pdf-downloads-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.pdf-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.pdf-card:hover {
  border-color: var(--color-asian-red);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pdf-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.pdf-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: rgba(201, 33, 30, 0.1);
  color: var(--color-asian-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
}

.pdf-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-charcoal);
  line-height: 1.3;
}

.pdf-meta {
  font-size: 12px;
  color: var(--color-slate-muted);
  margin-top: 3px;
}

.btn-pdf-dl {
  background: var(--color-asian-red);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: background-color 0.2s;
}

.btn-pdf-dl:hover {
  background: var(--color-asian-red-dark);
}

.blueprint-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.alert-callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 16px 0;
  border-left: 5px solid;
  font-size: 13.5px;
  line-height: 1.6;
}

.alert-callout-danger {
  background: #FEF2F2;
  border-color: #EF4444;
  color: #991B1B;
}

.alert-callout-success {
  background: #F0FDF4;
  border-color: #10B981;
  color: #065F46;
}

.alert-callout-warning {
  background: #FFFBEB;
  border-color: #F59E0B;
  color: #92400E;
}

.alert-callout-info {
  background: #EFF6FF;
  border-color: #3B82F6;
  color: #1E40AF;
}

.code-block-dark {
  background: var(--color-charcoal-dark);
  color: #E2E8F0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 12.5px;
  overflow-x: auto;
  line-height: 1.5;
  margin: 14px 0;
  border: 1px solid var(--color-border-dark);
}

.metric-highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.metric-box {
  background: #FAFAFA;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border-left: 4px solid var(--color-asian-red);
}

.metric-box-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-slate-muted);
  margin-bottom: 4px;
}

.metric-box-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-charcoal);
}

.metric-box-note {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 3px;
}