/* Shared styles – one file for cache, faster repeat loads */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

body {
  font-family: 'Inter', sans-serif;
  background-color: #f8fafc;
  background-image:
    radial-gradient(at 10% 10%, rgba(59, 130, 246, 0.12) 0px, transparent 60%),
    radial-gradient(at 90% 10%, rgba(99, 102, 241, 0.1) 0px, transparent 60%),
    radial-gradient(at 50% 50%, rgba(255, 255, 255, 0.8) 0px, transparent 100%),
    radial-gradient(at 90% 90%, rgba(147, 197, 253, 0.1) 0px, transparent 60%);
  background-attachment: fixed;
}

h1, h2, h3, h4, .font-serif {
  font-family: 'Instrument Serif', serif;
}

.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

/* Glass */
.glass-panel {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02), inset 0 0 20px rgba(255, 255, 255, 0.5);
}

.glass-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.3) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.05), inset 0 0 2px rgba(255, 255, 255, 0.6);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.5) 100%);
  box-shadow: 0 20px 40px -10px rgba(59, 130, 246, 0.1);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 1);
}

.glass-button-secondary {
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.glass-button-secondary:hover {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(255, 255, 255, 0.9);
}

/* Brand */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.brand-mark-tag {
  position: relative;
  padding: 0.12rem 0.6rem;
  border-radius: 0.5rem;
  color: #fff;
  background: rgba(0, 40, 104, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: none;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.14);
  overflow: hidden;
}

.brand-mark-tag::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: transparent;
  transform-origin: left;
  transform: scaleX(0);
  animation: brandBoxReveal 0.7s 0.2s cubic-bezier(0.33, 1, 0.68, 1) forwards;
}

@keyframes brandBoxReveal {
  to { transform: scaleX(1); }
}

/* About: text over image */
.goals-text-shadow {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Lang dropdown */
.lang-menu-panel {
  transform-origin: top;
  transform: translateY(-8px) scale(0.95);
  opacity: 0;
  transition: opacity 200ms ease-out, transform 200ms ease-out;
  pointer-events: none;
}

.lang-menu-panel.lang-open {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

/* Stats (index) */
.stats-card {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.25), inset 0 -1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  transition: transform 200ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 200ms ease, background-color 200ms ease, border-color 200ms ease;
}

.stats-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 16px 48px -12px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.35), inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}

/* Blur enter */
.blur-enter {
  animation: blurIn 1.2s ease forwards;
  opacity: 0;
  filter: blur(8px);
}

.blur-enter-delay-1 { animation-delay: 0.2s; }
.blur-enter-delay-2 { animation-delay: 0.4s; }
.blur-enter-delay-3 { animation-delay: 0.6s; }
.delay-100, .delay-1 { animation-delay: 0.1s; }
.delay-200, .delay-2 { animation-delay: 0.2s; }
.delay-300, .delay-3 { animation-delay: 0.3s; }

@keyframes blurIn {
  0% { opacity: 0; filter: blur(8px); transform: translateY(20px); }
  100% { opacity: 1; filter: blur(0); transform: translateY(0); }
}

/* Nav & mobile menu */
.nav-dropdown {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, visibility 0.2s, transform 0.2s;
}

.nav-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu-overlay {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-panel {
  transform: translateX(100%);
  transition: transform 0.25s ease;
}

.mobile-menu-panel.open {
  transform: translateX(0);
}

body.mobile-menu-open {
  overflow: hidden;
}

/* Products: table & search */
.table-row-hover:hover td {
  background-color: rgba(241, 245, 249, 0.5);
}

.search-input:focus-within {
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  border-color: #3b82f6;
}

.product-row.hidden {
  display: none;
}

.product-row.highlight {
  background-color: rgba(59, 130, 246, 0.05);
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(59, 130, 246, 0.08);
  color: #1d4ed8;
  border: 1px solid rgba(59, 130, 246, 0.18);
}

.autocomplete-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
}

.autocomplete-item:hover {
  background: rgba(241, 245, 249, 0.7);
}

.category-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 1.25rem;
  padding: 1.5rem;
  box-shadow: 0 12px 30px -18px rgba(15, 23, 42, 0.25);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.5s ease, border-color 0.5s ease;
}

.product-parent {
  scroll-margin-top: 120px;
}

.product-parent.is-open .category-card {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: 0 18px 40px -24px rgba(37, 99, 235, 0.45);
}

.category-card.category-card-bg {
  background: transparent;
  border: 1px solid rgba(226, 232, 240, 0.8);
  padding: 0;
}

.category-card-bg {
  position: relative;
  overflow: hidden;
  border-radius: 1.25rem;
  min-height: 200px;
}

.category-card-bg img.bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.category-card-bg .gradient-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(248,250,252,0.95) 0%, rgba(248,250,252,0.75) 40%, rgba(248,250,252,0.35) 65%, transparent 100%);
  z-index: 1;
  pointer-events: none;
}

.category-card-bg .card-inner {
  position: relative;
  z-index: 10;
}

.category-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.category-content {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transform: translateY(-6px);
  transition: max-height 0.6s ease, opacity 0.5s ease, transform 0.5s ease;
}

/* 展开时不再限制高度，防止大类内容被截断 */
.category-content.expanded {
  max-height: none;
  overflow: visible;
  opacity: 1;
  transform: translateY(0);
}

.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.25);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 40;
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Supplier / Inquiry: form & FAQ */
.field-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.field-input {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid #e2e8f0;
  background: rgba(255, 255, 255, 0.7);
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  color: #0f172a;
  transition: border-color 150ms, box-shadow 150ms;
}

.field-input:focus {
  outline: none;
  border-color: #60a5fa;
  box-shadow: 0 0 0 2px rgba(191, 219, 254, 1);
}

.field-textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid #e2e8f0;
  background: rgba(255, 255, 255, 0.7);
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  min-height: 100px;
}

.field-textarea:focus {
  outline: none;
  border-color: #60a5fa;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.7);
  padding: 0.25rem 0.75rem;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: #64748b;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

/* About: fullpage & parallax */
.global-reach-bg {
  animation: globalReachBg 25s ease-in-out infinite alternate;
}

@keyframes globalReachBg {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.06) translate(-1%, -1%); }
}

.fullpage-section {
  min-height: 100vh;
  position: relative;
}

.company-bg-parallax {
  transform: scale(1);
  transition: transform 2s cubic-bezier(0.22, 1, 0.36, 1);
}

.company-bg-parallax.in-view {
  transform: scale(1.05);
}

/* Network: connecting lines */
.network-line {
  position: absolute;
  background: linear-gradient(to bottom, rgba(59, 130, 246, 0), rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0));
  width: 1px;
  z-index: -1;
}

/* Solutions: grid & details */
.grid-bg {
  background-size: 40px 40px;
  background-image: linear-gradient(to right, rgba(0,0,0,0.03) 1px, transparent 1px), linear-gradient(to bottom, rgba(0,0,0,0.03) 1px, transparent 1px);
  mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
}

details summary::-webkit-details-marker {
  display: none;
}

details > summary {
  list-style: none;
}