/* ============================================================
   KeHong (科弘生物) Global Stylesheet
   方向: Refined Technical Authority — 精炼技术权威
   B2B 精细化工 / 医药中间体 / CRO·CDMO
   全部颜色使用 colors_and_type.css 中定义的 --kh-* 变量
   ============================================================ */

/* =================================================================
   1. RESET & BASE
   ================================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--kh-font-sans);
  font-size: 0.9375rem; /* 15px */
  line-height: 1.6;
  color: var(--kh-foreground);
  background-color: var(--kh-background);
  -webkit-font-smoothing: antialiased;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--kh-dur-fast) var(--kh-ease);
}

a:hover {
  color: var(--kh-link-hover);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea,
button {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--kh-gray-800);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--kh-text-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--kh-text-3xl); letter-spacing: -0.015em; }
h3 { font-size: var(--kh-text-2xl); }
h4 { font-size: var(--kh-text-xl); }
h5 { font-size: var(--kh-text-lg); }
h6 { font-size: var(--kh-text-base); }

p {
  margin-bottom: 0.75em;
}

/* Focus ring — global accessible focus style */
:focus-visible {
  outline: 2px solid var(--kh-brand-600);
  outline-offset: 2px;
  border-radius: var(--kh-radius-sm);
}

/* Selection */
::selection {
  background-color: var(--kh-brand-100);
  color: var(--kh-brand-900);
}

/* Scrollbar (webkit) */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--kh-gray-100);
}
::-webkit-scrollbar-thumb {
  background: var(--kh-gray-300);
  border-radius: var(--kh-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--kh-gray-400);
}

/* =================================================================
   2. TYPOGRAPHY UTILITIES
   ================================================================= */
.kh-mono {
  font-family: var(--kh-font-mono);
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.kh-formula sub,
.kh-formula sup {
  font-size: 0.7em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
.kh-formula sub { bottom: -0.25em; }
.kh-formula sup { top: -0.5em; }

/* Line clamp */
.kh-line-clamp-1,
.kh-line-clamp-2,
.kh-line-clamp-3 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}
.kh-line-clamp-1 { -webkit-line-clamp: 1; }
.kh-line-clamp-2 { -webkit-line-clamp: 2; }
.kh-line-clamp-3 { -webkit-line-clamp: 3; }

/* Text utilities */
.kh-text-muted    { color: var(--kh-muted-foreground); }
.kh-text-primary  { color: var(--kh-primary); }
.kh-text-cta      { color: var(--kh-cta); }
.kh-text-center   { text-align: center; }
.kh-text-right    { text-align: right; }
.kh-text-sm       { font-size: var(--kh-text-sm); }
.kh-text-lg       { font-size: var(--kh-text-lg); }
.kh-text-xl       { font-size: var(--kh-text-xl); }
.kh-font-semibold { font-weight: 600; }
.kh-font-bold     { font-weight: 700; }

/* =================================================================
   3. LAYOUT
   ================================================================= */
.kh-container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 16px;
}

@media (min-width: 640px) {
  .kh-container { padding-inline: 20px; }
}
@media (min-width: 1024px) {
  .kh-container { padding-inline: 24px; }
}

/* Section spacing */
.kh-section {
  padding-block: 48px;
}
.kh-section-sm { padding-block: 32px; }
.kh-section-lg { padding-block: 72px; }

@media (min-width: 768px) {
  .kh-section    { padding-block: 64px; }
  .kh-section-lg { padding-block: 96px; }
}

/* Flex / Grid utilities */
.kh-flex         { display: flex; }
.kh-flex-center  { display: flex; align-items: center; justify-content: center; }
.kh-flex-between { display: flex; align-items: center; justify-content: space-between; }
.kh-items-center { align-items: center; }
.kh-justify-center { justify-content: center; }
.kh-gap-2 { gap: 8px; }
.kh-gap-3 { gap: 12px; }
.kh-gap-4 { gap: 16px; }
.kh-gap-6 { gap: 24px; }
.kh-grid  { display: grid; }

/* =================================================================
   4. TOP BAR (信息栏)
   ================================================================= */
.kh-topbar {
  background-color: var(--kh-brand-900);
  color: var(--kh-brand-100);
  font-size: var(--kh-text-xs);
  line-height: 1;
  padding: 9px 0;
}

.kh-topbar .kh-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.kh-topbar-left,
.kh-topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.kh-topbar-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--kh-brand-100);
  transition: color var(--kh-dur-fast) var(--kh-ease);
}

.kh-topbar-item .kh-icon {
  width: 14px;
  height: 14px;
  opacity: 0.85;
}

.kh-topbar-item strong {
  color: var(--kh-primary-foreground);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.kh-topbar a.kh-topbar-item:hover {
  color: var(--kh-primary-foreground);
}

@media (max-width: 639px) {
  .kh-topbar {
    font-size: 11px;
    padding: 7px 0;
  }
  .kh-topbar-right { display: none; }
  .kh-topbar-left { gap: 12px; }
}

/* =================================================================
   5. NAVIGATION
   ================================================================= */
.kh-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--kh-background-alt);
  border-bottom: 1px solid var(--kh-border);
  transition: box-shadow var(--kh-dur-med) var(--kh-ease);
}

.kh-nav.is-scrolled {
  box-shadow: var(--kh-shadow-md);
}

.kh-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}

.kh-nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.kh-nav-logo-img {
  height: 40px;
  width: auto;
}

.kh-nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.kh-nav-logo-cn {
  font-size: var(--kh-text-xl);
  font-weight: 700;
  color: var(--kh-brand-800);
  letter-spacing: 0.03em;
}

.kh-nav-logo-en {
  font-size: 10px;
  color: var(--kh-gray-500);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.kh-nav-links {
  display: none;
  align-items: center;
  gap: 2px;
  margin-inline: auto;
}

@media (min-width: 1024px) {
  .kh-nav-links { display: flex; }
}

.kh-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--kh-gray-700);
  border-radius: var(--kh-radius-md);
  transition: color var(--kh-dur-fast) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease);
  white-space: normal;
  position: relative;
}

.kh-nav-link:hover {
  color: var(--kh-brand-800);
  background-color: var(--kh-brand-50);
}

.kh-nav-link.is-active,
.kh-nav-link.active {
  color: var(--kh-brand-800);
  font-weight: 600;
}

.kh-nav-link.is-active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background-color: var(--kh-cta);
  border-radius: 1px;
}

.kh-nav-cta {
  display: none;
}
@media (min-width: 1024px) {
  .kh-nav-cta { display: inline-flex; }
}

/* Mobile hamburger */
.kh-nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--kh-radius-md);
  color: var(--kh-gray-700);
  transition: background-color var(--kh-dur-fast) var(--kh-ease);
}
.kh-nav-toggle:hover {
  background-color: var(--kh-gray-100);
}
.kh-nav-toggle .kh-icon {
  width: 22px;
  height: 22px;
}
@media (min-width: 1024px) {
  .kh-nav-toggle { display: none; }
}

/* =================================================================
   6. HERO SECTION
   ================================================================= */
.kh-hero {
  position: relative;
  background-color: var(--kh-brand-900);
  background-image:
    linear-gradient(135deg,
      rgba(13,30,56,0.96) 0%,
      rgba(19,41,75,0.90) 55%,
      rgba(30,61,101,0.82) 100%),
    radial-gradient(ellipse at 20% 30%, rgba(94,131,173,0.25) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 70%, rgba(42,77,124,0.20) 0%, transparent 60%);
  background-size: cover;
  background-position: center;
  color: var(--kh-primary-foreground);
  padding: 72px 0 64px;
  overflow: hidden;
}

.kh-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(13,30,56,0.25) 0%, rgba(13,30,56,0) 40%),
    radial-gradient(circle at 50% 120%, rgba(60,100,148,0.2) 0%, transparent 50%);
  z-index: 1;
  pointer-events: none;
}

.kh-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(220,228,240,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(220,228,240,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 1;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
}

.kh-hero > * {
  position: relative;
  z-index: 2;
}

.kh-hero-inner {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.kh-hero-title {
  font-size: var(--kh-text-3xl);
  font-weight: 700;
  color: var(--kh-primary-foreground);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.kh-hero-subtitle {
  font-size: var(--kh-text-lg);
  color: var(--kh-brand-100);
  margin-bottom: 32px;
  line-height: 1.7;
  opacity: 0.92;
}

@media (min-width: 768px) {
  .kh-hero { padding: 104px 0 96px; }
  .kh-hero-title { font-size: var(--kh-text-5xl); letter-spacing: -0.02em; }
  .kh-hero-subtitle { font-size: var(--kh-text-xl); }
}

/* =================================================================
   7. BUTTONS
   ================================================================= */
.kh-btn,
.btn-primary,
.btn-secondary,
.btn-ghost,
.hero-cta-primary,
.cta-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  border-radius: var(--kh-radius-md);
  border: 1px solid transparent;
  transition: background-color var(--kh-dur-med) var(--kh-ease),
              color var(--kh-dur-med) var(--kh-ease),
              border-color var(--kh-dur-med) var(--kh-ease),
              box-shadow var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-fast) var(--kh-ease);
  white-space: normal;
  user-select: none;
  text-align: center;
}

.kh-btn:hover {
  transform: translateY(-1px);
}
.kh-btn:active {
  transform: translateY(0);
}

.kh-btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible,
.hero-cta-primary:focus-visible,
.cta-btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--kh-ring);
}

.kh-btn:disabled,
.kh-btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none !important;
}

.kh-btn .kh-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ----- Primary (navy) ----- */
.kh-btn-primary,
.btn-secondary {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-brand-800);
}

.kh-btn-primary:hover,
.btn-secondary:hover {
  background-color: var(--kh-brand-700);
  border-color: var(--kh-brand-700);
  color: var(--kh-primary-foreground);
}

/* ----- CTA (bronze-gold) — main conversion ----- */
.kh-btn-cta,
.btn-primary,
.hero-cta-primary,
.cta-btn-primary {
  background-color: var(--kh-cta);
  color: var(--kh-cta-foreground);
  border-color: var(--kh-cta);
  box-shadow: var(--kh-shadow-cta);
  font-weight: 600;
}

.kh-btn-cta:hover,
.btn-primary:hover,
.hero-cta-primary:hover,
.cta-btn-primary:hover {
  background-color: var(--kh-cta-hover);
  border-color: var(--kh-cta-hover);
  color: var(--kh-cta-foreground);
  box-shadow: 0 6px 20px rgba(160,117,35,0.38);
}

/* ----- Outlined (white with navy border) ----- */
.kh-btn-outline {
  background-color: transparent;
  color: var(--kh-brand-800);
  border-color: var(--kh-brand-800);
}
.kh-btn-outline:hover {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
}

/* ----- White (on dark backgrounds) ----- */
.kh-btn-white {
  background-color: var(--kh-primary-foreground);
  color: var(--kh-brand-800);
  border-color: var(--kh-primary-foreground);
}
.kh-btn-white:hover {
  background-color: var(--kh-brand-50);
  border-color: var(--kh-brand-50);
  color: var(--kh-brand-800);
}

/* ----- Ghost (text only, underline on hover) ----- */
.kh-btn-ghost,
.btn-ghost {
  background-color: transparent;
  color: var(--kh-brand-800);
  border-color: transparent;
  padding-inline: 4px;
  position: relative;
}
.kh-btn-ghost::after,
.btn-ghost::after {
  content: '';
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 6px;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--kh-dur-med) var(--kh-ease);
}
.kh-btn-ghost:hover,
.btn-ghost:hover {
  color: var(--kh-brand-700);
  transform: none;
}
.kh-btn-ghost:hover::after,
.btn-ghost:hover::after {
  transform: scaleX(1);
}

/* ----- Sizes ----- */
.kh-btn-sm { padding: 7px 14px; font-size: var(--kh-text-sm); }
.kh-btn-sm .kh-icon { width: 16px; height: 16px; }
.kh-btn-lg { padding: 14px 32px; font-size: var(--kh-text-lg); }
.kh-btn-lg .kh-icon { width: 20px; height: 20px; }
.kh-btn-block { display: flex; width: 100%; }

.kh-btn-group {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* =================================================================
   8. SECTION HEADERS
   ================================================================= */
.kh-section-header {
  text-align: center;
  margin-bottom: 40px;
}

.kh-section-title {
  font-size: var(--kh-text-2xl);
  font-weight: 700;
  color: var(--kh-gray-800);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
  letter-spacing: -0.01em;
}

.kh-section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background-color: var(--kh-cta);
  margin: 14px auto 0;
  border-radius: 2px;
}

.kh-section-desc {
  font-size: 0.9375rem;
  color: var(--kh-gray-500);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .kh-section-title { font-size: var(--kh-text-3xl); }
}

/* Left-aligned variant */
.kh-section-header-left {
  text-align: left;
  margin-bottom: 28px;
}
.kh-section-header-left .kh-section-title::after {
  margin-left: 0;
}

/* =================================================================
   9. CARDS (generic)
   ================================================================= */
.kh-card {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  box-shadow: var(--kh-shadow-sm);
  padding: 20px;
  transition: box-shadow var(--kh-dur-med) var(--kh-ease),
              border-color var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease);
}

.kh-card:hover {
  box-shadow: var(--kh-shadow-md);
  border-color: var(--kh-border-strong);
}

.kh-card-body   { padding: 20px; }
.kh-card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--kh-border);
  font-weight: 600;
  color: var(--kh-gray-800);
}
.kh-card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--kh-border);
  background-color: var(--kh-gray-50);
  border-bottom-left-radius: var(--kh-radius-lg);
  border-bottom-right-radius: var(--kh-radius-lg);
}

/* =================================================================
   10. PRODUCT CARDS
   ================================================================= */
.kh-product-card {
  display: flex;
  flex-direction: column;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  box-shadow: var(--kh-shadow-sm);
  transition: box-shadow var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease),
              border-color var(--kh-dur-med) var(--kh-ease);
  height: 100%;
}

.kh-product-card:hover {
  box-shadow: var(--kh-shadow-lg);
  border-color: var(--kh-brand-200);
  transform: translateY(-3px);
}

.kh-product-card-img {
  aspect-ratio: 4 / 3;
  background-color: var(--kh-gray-100);
  overflow: hidden;
  position: relative;
}

.kh-product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--kh-dur-slow) var(--kh-ease-out);
}

.kh-product-card:hover .kh-product-card-img img {
  transform: scale(1.05);
}

.kh-product-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 8px;
}

.kh-product-card-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--kh-gray-800);
  line-height: 1.45;
  min-height: 2.9em;
}

.kh-product-card-cas {
  font-family: var(--kh-font-mono);
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
  letter-spacing: 0.02em;
  background-color: var(--kh-steel-50);
  padding: 2px 8px;
  border-radius: var(--kh-radius-sm);
  display: inline-block;
  width: fit-content;
}

.kh-product-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--kh-border);
}

.kh-product-card-purity {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-600);
}

.kh-product-card-action {
  margin-top: auto;
  padding-top: 12px;
}
.kh-product-card-action .kh-btn {
  width: 100%;
}

/* Product "询价" button — outline gold, fill on hover */
.kh-product-card .kh-btn-inquire,
.kh-btn-inquire {
  background-color: transparent;
  color: var(--kh-cta);
  border: 1px solid var(--kh-cta);
  font-weight: 600;
  border-radius: var(--kh-radius-md);
  padding: 8px 16px;
  transition: all var(--kh-dur-med) var(--kh-ease);
  box-shadow: none;
}
.kh-product-card .kh-btn-inquire:hover,
.kh-btn-inquire:hover {
  background-color: var(--kh-cta);
  color: var(--kh-cta-foreground);
  box-shadow: var(--kh-shadow-cta);
  transform: translateY(-1px);
}

/* Product grid */
.kh-product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (min-width: 640px) {
  .kh-product-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (min-width: 768px) {
  .kh-product-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .kh-product-grid { grid-template-columns: repeat(4, 1fr); }
}

/* Hot tag on product */
.kh-product-hot-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--kh-radius-sm);
  letter-spacing: 0.05em;
  z-index: 2;
  box-shadow: 0 2px 6px rgba(197,146,46,0.35);
}

/* =================================================================
   11. BLOG / NEWS CARDS
   ================================================================= */
.kh-blog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  box-shadow: var(--kh-shadow-sm);
  transition: box-shadow var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease);
  height: 100%;
}

.kh-blog-card:hover {
  box-shadow: var(--kh-shadow-md);
  transform: translateY(-2px);
}

.kh-blog-card-img {
  aspect-ratio: 16 / 9;
  background-color: #FFFFFF;
  overflow: hidden;
}
.kh-blog-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
  box-sizing: border-box;
  transition: transform var(--kh-dur-slow) var(--kh-ease-out);
}
.kh-blog-card:hover .kh-blog-card-img img {
  transform: scale(1.04);
}

.kh-blog-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
}

.kh-blog-card-date {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
}

.kh-blog-card-title {
  font-size: var(--kh-text-lg);
  font-weight: 600;
  color: var(--kh-gray-800);
  line-height: 1.45;
}

.kh-blog-card-excerpt {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-600);
  line-height: 1.65;
}

.kh-blog-card-more {
  margin-top: auto;
  font-size: var(--kh-text-sm);
  color: var(--kh-brand-800);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--kh-dur-med) var(--kh-ease), color var(--kh-dur-fast) var(--kh-ease);
}
.kh-blog-card-more:hover {
  color: var(--kh-cta);
  gap: 8px;
}
.kh-blog-card-more .kh-icon {
  width: 16px;
  height: 16px;
}

/* Blog grid */
.kh-blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 640px) {
  .kh-blog-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .kh-blog-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Featured blog card */
.kh-blog-card-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  box-shadow: var(--kh-shadow-md);
  margin-bottom: 32px;
}
@media (min-width: 768px) {
  .kh-blog-card-featured {
    grid-template-columns: 1.2fr 1fr;
  }
}

.kh-blog-card-featured-img {
  aspect-ratio: 16/10;
  background-color: var(--kh-gray-100);
  position: relative;
  overflow: hidden;
}
.kh-blog-card-featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kh-blog-card-featured-sticky {
  position: absolute;
  top: 14px;
  left: 14px;
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  padding: 5px 10px;
  border-radius: var(--kh-radius-sm);
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.kh-blog-card-featured-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.kh-blog-card-featured-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.kh-blog-card-featured-title {
  font-size: var(--kh-text-xl);
  font-weight: 700;
  color: var(--kh-gray-800);
  line-height: 1.4;
}
@media (min-width: 768px) {
  .kh-blog-card-featured-title { font-size: var(--kh-text-2xl); }
}

.kh-blog-card-featured-excerpt {
  color: var(--kh-gray-600);
  line-height: 1.7;
}

.kh-blog-card-featured-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--kh-border);
}

/* Arrow link */
.kh-arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--kh-brand-800);
  font-weight: 500;
  font-size: var(--kh-text-sm);
  transition: gap var(--kh-dur-med) var(--kh-ease), color var(--kh-dur-fast) var(--kh-ease);
}
.kh-arrow-link:hover {
  color: var(--kh-cta);
  gap: 10px;
}
.kh-arrow-link .kh-icon {
  width: 16px;
  height: 16px;
}

/* Blog header (page banner) */
.kh-blog-header {
  background: linear-gradient(135deg, var(--kh-brand-900) 0%, var(--kh-brand-800) 60%, var(--kh-brand-700) 100%);
  color: var(--kh-primary-foreground);
  padding: 56px 0 48px;
  position: relative;
  overflow: hidden;
}
.kh-blog-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(197,146,46,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.kh-blog-header > * { position: relative; z-index: 1; }

.kh-blog-header-title {
  font-size: var(--kh-text-3xl);
  font-weight: 700;
  color: var(--kh-primary-foreground);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.kh-blog-header-subtitle {
  font-size: var(--kh-text-base);
  color: var(--kh-brand-100);
  opacity: 0.85;
  max-width: 640px;
}

/* Blog category filter pills */
.kh-blog-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.kh-blog-cat {
  padding: 7px 16px;
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-brand-100);
  border: 1px solid rgba(220,228,240,0.25);
  border-radius: var(--kh-radius-full);
  background-color: rgba(255,255,255,0.06);
  transition: all var(--kh-dur-fast) var(--kh-ease);
  cursor: pointer;
}
.kh-blog-cat:hover {
  background-color: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
}
.kh-blog-cat.is-active {
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-cta);
  font-weight: 600;
}

/* =================================================================
   12. BADGES / TAGS
   ================================================================= */
.kh-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: var(--kh-text-xs);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--kh-radius-sm);
  white-space: normal;
}

/* Category tag — light navy bg, dark navy text */
.kh-badge-primary {
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-700);
  border: 1px solid var(--kh-brand-200);
}

/* Blog category soft badges (gold-soft bg) */
.kh-badge-cat-syn,
.kh-badge-cat-proc,
.kh-badge-cat-ana,
.kh-badge-cat-safe,
.kh-badge-cat-news {
  background-color: var(--kh-cta-soft);
  color: var(--kh-accent-800);
  font-weight: 500;
  border-radius: var(--kh-radius-sm);
}

.kh-badge-success {
  background-color: var(--kh-success-bg);
  color: var(--kh-success);
  border: 1px solid rgba(31,122,74,0.18);
}

.kh-badge-warning {
  background-color: var(--kh-warning-bg);
  color: var(--kh-warning);
  border: 1px solid rgba(168,99,12,0.18);
}

/* Error badge — terracotta, NOT bright red */
.kh-badge-danger {
  background-color: var(--kh-error-bg);
  color: var(--kh-error);
  border: 1px solid rgba(177,66,40,0.18);
}

.kh-badge-info {
  background-color: var(--kh-info-bg);
  color: var(--kh-info);
  border: 1px solid rgba(42,77,124,0.18);
}

/* Hot tag — CTA gold */
.kh-badge-hot {
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  font-weight: 600;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 6px rgba(197,146,46,0.3);
}

/* =================================================================
   13. PAGINATION — minimal prev/next only
   ================================================================= */
.kh-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.kh-page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 22px;
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-gray-700);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-md);
  background-color: var(--kh-card);
  transition: color var(--kh-dur-fast) var(--kh-ease),
              border-color var(--kh-dur-fast) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease);
}

.kh-page-link:hover {
  color: var(--kh-brand-800);
  border-color: var(--kh-brand-300);
  background-color: var(--kh-brand-50);
}

.kh-page-link.is-active,
.kh-page-link.active {
  background-color: var(--kh-brand-800);
  border-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  font-weight: 600;
}

.kh-page-link[disabled],
.kh-page-link.is-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}

/* =================================================================
   14. FORMS
   ================================================================= */
.kh-label {
  display: block;
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-gray-700);
  margin-bottom: 6px;
}

.kh-label .kh-required {
  color: var(--kh-cta);
  margin-left: 2px;
}

.kh-input,
.kh-select,
.kh-textarea {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--kh-foreground);
  background-color: var(--kh-card);
  border: 1px solid var(--kh-input);
  border-radius: var(--kh-radius-md);
  transition: border-color var(--kh-dur-fast) var(--kh-ease),
              box-shadow var(--kh-dur-fast) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease);
}

.kh-input::placeholder,
.kh-textarea::placeholder {
  color: var(--kh-gray-400);
}

.kh-input:hover,
.kh-select:hover,
.kh-textarea:hover {
  border-color: var(--kh-gray-300);
}

.kh-input:focus,
.kh-select:focus,
.kh-textarea:focus {
  outline: none;
  border-color: var(--kh-input-focus);
  box-shadow: 0 0 0 3px var(--kh-ring);
  background-color: var(--kh-card);
}

.kh-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237C7366' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 36px;
  cursor: pointer;
}

.kh-textarea {
  min-height: 110px;
  resize: vertical;
  font-family: inherit;
}

.kh-form-group { margin-bottom: 18px; }

.kh-form-row {
  display: grid;
  gap: 16px;
}
@media (min-width: 640px) {
  .kh-form-row-2 { grid-template-columns: repeat(2, 1fr); }
  .kh-form-row-3 { grid-template-columns: repeat(3, 1fr); }
}

.kh-form-hint {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
  margin-top: 4px;
}

.kh-form-error {
  font-size: var(--kh-text-xs);
  color: var(--kh-error);
  margin-top: 4px;
}

.kh-input.is-error,
.kh-select.is-error,
.kh-textarea.is-error {
  border-color: var(--kh-error);
  box-shadow: 0 0 0 3px rgba(177,66,40,0.15);
}

/* =================================================================
   15. SEARCH BOX
   ================================================================= */
.kh-search-box {
  background-color: var(--kh-card);
  border-radius: var(--kh-radius-lg);
  padding: 8px;
  box-shadow: var(--kh-shadow-xl);
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: 720px;
  margin: 0 auto;
  border: 1px solid rgba(255,255,255,0.3);
}

.kh-search-input {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
}

.kh-search-input .kh-icon {
  width: 20px;
  height: 20px;
  color: var(--kh-gray-400);
  flex-shrink: 0;
}

.kh-search-input input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 12px 0;
  font-size: 0.9375rem;
  color: var(--kh-gray-800);
  min-width: 0;
}

.kh-search-input input::placeholder {
  color: var(--kh-gray-400);
}

.kh-search-box .kh-btn {
  flex-shrink: 0;
  padding: 12px 28px;
}

.kh-search-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
}

.kh-search-hot-label {
  font-size: var(--kh-text-sm);
  color: var(--kh-brand-200);
  align-self: center;
}

.kh-search-hot a {
  font-size: var(--kh-text-sm);
  color: var(--kh-brand-100);
  padding: 5px 14px;
  border-radius: var(--kh-radius-full);
  background-color: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--kh-dur-fast) var(--kh-ease);
}

.kh-search-hot a:hover {
  background-color: rgba(197,146,46,0.25);
  border-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
}

@media (max-width: 639px) {
  .kh-search-box {
    flex-direction: column;
    padding: 12px;
    gap: 8px;
  }
  .kh-search-input {
    width: 100%;
    padding: 0 8px;
  }
  .kh-search-box .kh-btn {
    width: 100%;
  }
}

/* =================================================================
   16. BREADCRUMBS
   ================================================================= */
.kh-breadcrumb {
  padding: 14px 0;
  background-color: var(--kh-gray-50);
  border-bottom: 1px solid var(--kh-border);
  font-size: var(--kh-text-sm);
}

.kh-breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--kh-gray-500);
}

.kh-breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.kh-breadcrumb-item a {
  color: var(--kh-gray-600);
  transition: color var(--kh-dur-fast) var(--kh-ease);
}
.kh-breadcrumb-item a:hover {
  color: var(--kh-brand-800);
}

.kh-breadcrumb-sep {
  width: 12px;
  height: 12px;
  color: var(--kh-gray-400);
}

.kh-breadcrumb-current {
  color: var(--kh-gray-800);
  font-weight: 500;
}

/* =================================================================
   17. TABS
   ================================================================= */
.kh-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--kh-border);
}

.kh-tab {
  padding: 10px 18px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--kh-gray-600);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--kh-dur-fast) var(--kh-ease),
              border-color var(--kh-dur-fast) var(--kh-ease);
  background: transparent;
  white-space: normal;
}

.kh-tab:hover { color: var(--kh-brand-800); }

.kh-tab-active,
.kh-tab.is-active {
  color: var(--kh-brand-800);
  font-weight: 600;
  border-bottom-color: var(--kh-cta);
}

/* Pill-style tabs */
.kh-tabs-pill {
  border-bottom: none;
  gap: 8px;
}
.kh-tabs-pill .kh-tab {
  padding: 8px 18px;
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-full);
  background-color: var(--kh-card);
  margin-bottom: 0;
}
.kh-tabs-pill .kh-tab:hover {
  border-color: var(--kh-brand-300);
  background-color: var(--kh-brand-50);
}
.kh-tabs-pill .kh-tab-active,
.kh-tabs-pill .kh-tab.is-active {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-brand-800);
}

/* =================================================================
   18. DATA TABLES
   ================================================================= */
.kh-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  background-color: var(--kh-card);
}

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

.kh-table th,
.kh-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--kh-border);
  vertical-align: middle;
}

.kh-table thead th {
  background-color: var(--kh-gray-50);
  font-weight: 600;
  color: var(--kh-gray-700);
  white-space: normal;
  font-size: var(--kh-text-sm);
  letter-spacing: 0.01em;
}

.kh-table tbody tr:last-child td {
  border-bottom: none;
}

.kh-table tbody tr {
  transition: background-color var(--kh-dur-fast) var(--kh-ease);
}
.kh-table tbody tr:hover {
  background-color: var(--kh-gray-50);
}

.kh-table td.kh-mono {
  color: var(--kh-gray-700);
}

.kh-table th.kh-table-num,
.kh-table td.kh-table-num {
  text-align: right;
  font-feature-settings: "tnum" 1;
}

/* =================================================================
   19. FEATURE / TRUST BLOCKS
   ================================================================= */
.kh-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px;
  border-radius: var(--kh-radius-lg);
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  transition: border-color var(--kh-dur-med) var(--kh-ease),
              box-shadow var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease);
}

.kh-feature-item:hover {
  border-color: var(--kh-brand-200);
  box-shadow: var(--kh-shadow-md);
  transform: translateY(-2px);
}

.kh-feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--kh-radius-md);
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-800);
  display: flex;
  align-items: center;
  justify-content: center;
}
.kh-feature-icon .kh-icon {
  width: 24px;
  height: 24px;
}

.kh-feature-title {
  font-size: var(--kh-text-base);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 6px;
}

.kh-feature-desc {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-600);
  line-height: 1.65;
}

/* Service cards — left border accent */
.kh-service-card {
  background-color: var(--kh-gray-50);
  border: 1px solid var(--kh-border);
  border-left: 3px solid var(--kh-brand-600);
  border-radius: var(--kh-radius-md);
  padding: 24px;
  transition: all var(--kh-dur-med) var(--kh-ease);
}
.kh-service-card:hover {
  background-color: var(--kh-card);
  border-left-color: var(--kh-cta);
  box-shadow: var(--kh-shadow-md);
  transform: translateY(-2px);
}

.kh-trust-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  text-align: center;
  border-radius: var(--kh-radius-lg);
  background-color: var(--kh-gray-50);
  border: 1px solid var(--kh-border);
}

.kh-trust-badge-icon {
  width: 40px;
  height: 40px;
  color: var(--kh-brand-800);
}

.kh-trust-badge-text {
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-gray-700);
}

/* =================================================================
   20. HERO FLOATING FEATURE CARDS
   ================================================================= */
.kh-hero-features {
  position: relative;
  margin-top: -72px;
  z-index: 10;
  padding: 0 20px;
}

.kh-hero-features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (min-width: 768px) {
  .kh-hero-features-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
}

.kh-hero-feature-card {
  background-color: var(--kh-card);
  border-radius: var(--kh-radius-lg);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--kh-shadow-lg);
  border: 1px solid var(--kh-border);
  transition: transform var(--kh-dur-med) var(--kh-ease),
              box-shadow var(--kh-dur-med) var(--kh-ease);
  cursor: pointer;
}

.kh-hero-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--kh-shadow-xl);
}

.kh-hero-feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: var(--kh-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
}

.kh-hero-feature-icon.kh-icon-blue {
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-700);
}
.kh-hero-feature-icon.kh-icon-gold {
  background-color: var(--kh-cta-soft);
  color: var(--kh-accent-700);
}
.kh-hero-feature-icon.kh-icon-green {
  background-color: var(--kh-success-bg);
  color: var(--kh-success);
}
.kh-hero-feature-icon.kh-icon-steel {
  background-color: var(--kh-steel-100);
  color: var(--kh-brand-600);
}

.kh-hero-feature-title {
  font-size: var(--kh-text-base);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 6px;
}

.kh-hero-feature-desc {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-500);
  line-height: 1.6;
}

@media (max-width: 639px) {
  .kh-hero-features-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .kh-hero-feature-card {
    padding: 20px;
  }
  .kh-hero-features { margin-top: -40px; }
}

/* =================================================================
   21. HERO HOT KEYWORD TAGS
   ================================================================= */
.kh-hero-hot-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
}

.kh-hero-hot-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: rgba(197,146,46,0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(197,146,46,0.3);
  border-radius: var(--kh-radius-full);
  color: var(--kh-accent-200);
  font-size: var(--kh-text-sm);
  font-weight: 500;
  transition: all var(--kh-dur-fast) var(--kh-ease);
  cursor: pointer;
  text-decoration: none;
}

.kh-hero-hot-tag:hover {
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-cta);
  transform: translateY(-1px);
  box-shadow: var(--kh-shadow-cta);
}

.kh-hero-hot-tag .kh-tag-name {
  font-family: var(--kh-font-mono);
  font-size: var(--kh-text-xs);
  opacity: 0.8;
  letter-spacing: 0.02em;
}

/* =================================================================
   22. STATS / NUMBERS
   ================================================================= */
.kh-stat-number {
  font-size: var(--kh-text-4xl);
  font-weight: 700;
  color: var(--kh-brand-800);
  line-height: 1.1;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.02em;
}

.kh-stat-number .kh-stat-unit {
  font-size: var(--kh-text-lg);
  font-weight: 500;
  color: var(--kh-gray-500);
  margin-left: 4px;
}

.kh-stat-label {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-600);
  margin-top: 8px;
}

@media (min-width: 768px) {
  .kh-stat-number { font-size: 2.75rem; }
}

/* Dark stats */
.kh-stats-dark .kh-stat-number { color: var(--kh-primary-foreground); }
.kh-stats-dark .kh-stat-number .kh-stat-unit { color: var(--kh-brand-200); }
.kh-stats-dark .kh-stat-label { color: var(--kh-brand-100); }

/* Overlapping stats bar */
.kh-stats-overlap {
  position: relative;
  margin-top: -40px;
  z-index: 9;
  padding: 0 20px;
  margin-bottom: 40px;
}

.kh-stats-overlap-inner {
  max-width: 1200px;
  margin: 0 auto;
  background-color: var(--kh-card);
  border-radius: var(--kh-radius-lg);
  box-shadow: var(--kh-shadow-lg);
  padding: 28px 20px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  border: 1px solid var(--kh-border);
}

@media (min-width: 768px) {
  .kh-stats-overlap-inner {
    grid-template-columns: repeat(4, 1fr);
    padding: 32px 24px;
  }
}

.kh-stat-item {
  text-align: center;
  position: relative;
}
.kh-stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background-color: var(--kh-border);
}
@media (max-width: 767px) {
  .kh-stat-item:nth-child(2n)::after { display: none; }
}

.kh-stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--kh-brand-800);
  line-height: 1.2;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.02em;
}
.kh-stat-num .kh-stat-unit {
  font-size: 16px;
  font-weight: 600;
  color: var(--kh-cta);
}
.kh-stat-item .kh-stat-label {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-500);
  margin-top: 4px;
}

/* Stat cell (about page) */
.kh-stat-cell {
  text-align: center;
  padding: 14px;
  border-right: 1px solid var(--kh-border);
}
.kh-stat-cell:last-child { border-right: none; }
.kh-stat-cell-num {
  font-size: var(--kh-text-2xl);
  font-weight: 700;
  color: var(--kh-brand-800);
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}
.kh-stat-cell-num .unit {
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-cta);
  margin-left: 2px;
}
.kh-stat-cell-label {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
  margin-top: 4px;
}

/* =================================================================
   23. LOGO MARK (K icon)
   ================================================================= */
.kh-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--kh-cta) 0%, var(--kh-accent-600) 100%);
  border-radius: var(--kh-radius-md);
  color: var(--kh-primary-foreground);
  font-weight: 800;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: var(--kh-shadow-cta);
  letter-spacing: -0.02em;
}

/* =================================================================
   24. FOOTER
   ================================================================= */
.kh-footer {
  background-color: var(--kh-brand-900);
  color: var(--kh-gray-400);
  padding-top: 56px;
  padding-bottom: 0;
  font-size: var(--kh-text-sm);
  position: relative;
}
.kh-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--kh-cta) 0%, var(--kh-brand-600) 50%, var(--kh-cta) 100%);
}

.kh-footer-main {
  display: grid;
  gap: 32px;
  padding-bottom: 40px;
}

@media (min-width: 640px) {
  .kh-footer-main { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}
@media (max-width: 639px) {
  .kh-footer-main { grid-template-columns: 1fr 1fr; gap: 28px; }
  .kh-footer-col-brand { grid-column: 1 / -1; }
}

.kh-footer-col-title {
  font-size: var(--kh-text-base);
  font-weight: 600;
  color: var(--kh-primary-foreground);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}

.kh-footer-link {
  display: block;
  padding: 5px 0;
  color: var(--kh-gray-400);
  transition: color var(--kh-dur-fast) var(--kh-ease), padding-left var(--kh-dur-fast) var(--kh-ease);
  line-height: 1.6;
}
.kh-footer-link:hover {
  color: var(--kh-cta);
  padding-left: 4px;
}

.kh-footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.kh-footer-logo-cn {
  font-size: var(--kh-text-2xl);
  font-weight: 700;
  color: var(--kh-primary-foreground);
  letter-spacing: 0.03em;
}

.kh-footer-logo-en {
  font-size: 10px;
  color: var(--kh-gray-500);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.kh-footer-desc {
  color: var(--kh-gray-400);
  line-height: 1.7;
  margin: 0;
}

.kh-footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 4px 0;
  color: var(--kh-gray-400);
}
.kh-footer-contact-item .kh-icon {
  width: 16px;
  height: 16px;
  color: var(--kh-cta);
  margin-top: 3px;
  flex-shrink: 0;
}
.kh-footer-contact-item strong {
  color: var(--kh-primary-foreground);
  font-weight: 600;
}

.kh-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
}

.kh-footer-bottom .kh-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.kh-footer-icp {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.kh-footer-icp a {
  color: var(--kh-gray-500);
  transition: color var(--kh-dur-fast) var(--kh-ease);
}
.kh-footer-icp a:hover {
  color: var(--kh-gray-300);
}

/* =================================================================
   25. FLOATING CONTACT CARDS (right side)
   ================================================================= */
.kh-float-cta {
  position: fixed;
  right: 16px;
  bottom: 100px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease);
}

.kh-float-cta.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.kh-float-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 56px;
  height: 56px;
  border-radius: var(--kh-radius-full);
  background-color: var(--kh-card);
  color: var(--kh-cta);
  box-shadow: var(--kh-shadow-md);
  font-size: 10px;
  font-weight: 500;
  border: 1px solid var(--kh-border);
  transition: background-color var(--kh-dur-fast) var(--kh-ease),
              transform var(--kh-dur-fast) var(--kh-ease),
              box-shadow var(--kh-dur-fast) var(--kh-ease),
              color var(--kh-dur-fast) var(--kh-ease);
}

/* CTA/咨询 button — gold circle */
.kh-float-btn.kh-float-btn-cta {
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-cta);
  box-shadow: var(--kh-shadow-cta);
  width: 60px;
  height: 60px;
}
.kh-float-btn.kh-float-btn-cta:hover {
  background-color: var(--kh-cta-hover);
  box-shadow: 0 6px 20px rgba(160,117,35,0.4);
}

/* Phone button — navy circle */
.kh-float-btn.kh-float-btn-phone {
  color: var(--kh-brand-800);
}
.kh-float-btn.kh-float-btn-phone:hover {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-brand-800);
}

/* WeChat button — success green circle */
.kh-float-btn.kh-float-btn-wechat {
  color: var(--kh-success);
}
.kh-float-btn.kh-float-btn-wechat:hover {
  background-color: var(--kh-success);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-success);
}

/* Top button */
.kh-float-btn.kh-float-btn-top {
  background-color: var(--kh-card);
  color: var(--kh-gray-600);
  opacity: 0;
  transform: scale(0.85);
  pointer-events: none;
  transition: opacity var(--kh-dur-med) var(--kh-ease),
              transform var(--kh-dur-med) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease),
              color var(--kh-dur-fast) var(--kh-ease);
}
.kh-float-btn.kh-float-btn-top:hover {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-brand-800);
}

.kh-float-cta.is-visible .kh-float-btn-top.is-visible {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.kh-float-btn:hover {
  transform: scale(1.06);
}
.kh-float-btn .kh-icon {
  width: 22px;
  height: 22px;
}

/* QR code popup */
.kh-float-qrcode {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  background-color: var(--kh-card);
  padding: 12px;
  border-radius: var(--kh-radius-md);
  box-shadow: var(--kh-shadow-lg);
  border: 1px solid var(--kh-border);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--kh-dur-fast) var(--kh-ease),
              transform var(--kh-dur-fast) var(--kh-ease),
              visibility var(--kh-dur-fast) var(--kh-ease);
  text-align: center;
  white-space: normal;
}

.kh-float-btn:hover .kh-float-qrcode {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.kh-float-qrcode img {
  max-width: 140px;
  max-height: 160px;
  width: auto;
  height: auto;
  display: block;
  border-radius: 4px;
}
.kh-float-qrcode-text {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-600);
  margin-top: 6px;
}

@media (max-width: 639px) {
  .kh-float-cta { right: 12px; bottom: 84px; gap: 8px; }
  .kh-float-btn { width: 48px; height: 48px; font-size: 9px; }
  .kh-float-btn.kh-float-btn-cta { width: 52px; height: 52px; }
  .kh-float-btn .kh-icon { width: 20px; height: 20px; }
}

/* =================================================================
   26. QUICK CONTACT SIDEBAR (left side)
   ================================================================= */
.kh-quick-contact {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 85;
  display: none;
  flex-direction: column;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-left: none;
  border-top-right-radius: var(--kh-radius-md);
  border-bottom-right-radius: var(--kh-radius-md);
  box-shadow: var(--kh-shadow-lg);
  overflow: visible;
}

@media (min-width: 1280px) {
  .kh-quick-contact { display: flex; }
}

.kh-qc-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 68px;
  padding: 12px 6px;
  font-size: 11px;
  color: var(--kh-gray-700);
  border-bottom: 1px solid var(--kh-border);
  transition: background-color var(--kh-dur-fast) var(--kh-ease),
              color var(--kh-dur-fast) var(--kh-ease);
  cursor: pointer;
}
.kh-qc-item:last-child { border-bottom: none; }

.kh-qc-item .kh-icon {
  width: 22px;
  height: 22px;
  color: var(--kh-brand-800);
  transition: color var(--kh-dur-fast) var(--kh-ease);
}
.kh-qc-item.kh-qc-wechat .kh-icon { color: var(--kh-success); }
.kh-qc-item.kh-qc-phone .kh-icon { color: var(--kh-cta); }
.kh-qc-item.kh-qc-qq .kh-icon { color: var(--kh-info); }

.kh-qc-item:hover {
  background-color: var(--kh-brand-50);
}

.kh-qc-item strong {
  font-size: 12px;
  font-weight: 600;
  color: var(--kh-cta);
  display: block;
  margin-top: 2px;
}

/* QR popup */
.kh-qc-popup {
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  background-color: var(--kh-card);
  padding: 12px;
  border-radius: var(--kh-radius-md);
  box-shadow: var(--kh-shadow-lg);
  border: 1px solid var(--kh-border);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--kh-dur-fast) var(--kh-ease),
              transform var(--kh-dur-fast) var(--kh-ease),
              visibility var(--kh-dur-fast) var(--kh-ease);
  white-space: normal;
  text-align: center;
  z-index: 86;
}
.kh-qc-item:hover .kh-qc-popup {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}
.kh-qc-popup img {
  max-width: 140px;
  max-height: 160px;
  width: auto;
  height: auto;
  display: block;
  border-radius: 4px;
}
.kh-qc-popup-text {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-600);
  margin-top: 6px;
}
.kh-qc-popup-phone {
  font-size: var(--kh-text-lg);
  font-weight: 700;
  color: var(--kh-cta);
  margin: 8px 0 4px;
  font-feature-settings: "tnum" 1;
}

/* =================================================================
   27. MOBILE MENU
   ================================================================= */
.kh-mobile-menu {
  display: block;
  background-color: var(--kh-card);
  border-bottom: 1px solid var(--kh-border);
  box-shadow: var(--kh-shadow-md);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--kh-dur-slow) var(--kh-ease);
}

.kh-mobile-menu.is-open {
  max-height: 85vh;
  overflow-y: auto;
}

.kh-mobile-menu-inner {
  padding: 8px 0 20px;
}

.kh-nav-link-mobile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--kh-gray-700);
  border-bottom: 1px solid var(--kh-border);
  transition: background-color var(--kh-dur-fast) var(--kh-ease),
              color var(--kh-dur-fast) var(--kh-ease);
}

.kh-nav-link-mobile:active,
.kh-nav-link-mobile:hover {
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-800);
}

.kh-nav-link-mobile.is-active {
  color: var(--kh-brand-800);
  font-weight: 600;
  background-color: var(--kh-brand-50);
  border-left: 3px solid var(--kh-cta);
  padding-left: 17px;
}

.kh-mobile-menu-cta {
  padding: 16px 20px 0;
}
.kh-mobile-menu-cta .kh-btn {
  width: 100%;
}

.kh-mobile-menu-contact {
  padding: 16px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-600);
}
.kh-mobile-menu-contact a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--kh-brand-800);
  font-weight: 500;
}
.kh-mobile-menu-contact .kh-icon {
  width: 16px;
  height: 16px;
}

/* =================================================================
   28. AI ASSISTANT CHAT WIDGET
   ================================================================= */
.kh-ai-widget {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  pointer-events: none;
}

/* Launcher FAB — bronze-gold circle */
.kh-ai-launcher {
  pointer-events: auto;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--kh-cta) 0%, var(--kh-accent-600) 100%);
  color: var(--kh-primary-foreground);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--kh-shadow-cta), 0 6px 20px rgba(197,146,46,0.35);
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1),
              box-shadow var(--kh-dur-med) var(--kh-ease);
  position: relative;
  border: 2px solid rgba(255,255,255,0.2);
}

.kh-ai-launcher:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 28px rgba(160,117,35,0.45);
}

.kh-ai-launcher .kh-ai-icon {
  width: 26px;
  height: 26px;
}

/* Pulse ring */
.kh-ai-launcher::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--kh-cta);
  opacity: 0;
  animation: khAiPulse 2.5s ease-out infinite;
}

@keyframes khAiPulse {
  0%   { transform: scale(0.9); opacity: 0.6; }
  80%, 100% { transform: scale(1.4); opacity: 0; }
}

.kh-ai-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  font-size: 10px;
  font-weight: 700;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--kh-card);
  line-height: 1;
}

.kh-ai-label {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--kh-brand-900);
  color: var(--kh-primary-foreground);
  padding: 6px 12px;
  border-radius: var(--kh-radius-md);
  font-size: var(--kh-text-sm);
  white-space: normal;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--kh-dur-fast) var(--kh-ease);
  box-shadow: var(--kh-shadow-md);
}
.kh-ai-launcher:hover .kh-ai-label { opacity: 1; }

/* AI Panel */
.kh-ai-panel {
  pointer-events: auto;
  width: 380px;
  max-width: calc(100vw - 24px);
  height: 540px;
  max-height: calc(100vh - 120px);
  background-color: var(--kh-card);
  border-radius: var(--kh-radius-xl);
  box-shadow: var(--kh-shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  transform: scale(0.85) translateY(20px);
  opacity: 0;
  pointer-events: none;
  border: 1px solid var(--kh-border);
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1),
              opacity var(--kh-dur-med) var(--kh-ease);
}

.kh-ai-panel.is-open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Panel header — deep navy */
.kh-ai-header {
  background: linear-gradient(135deg, var(--kh-brand-900) 0%, var(--kh-brand-800) 100%);
  color: var(--kh-primary-foreground);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}
.kh-ai-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--kh-cta), transparent);
}

.kh-ai-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--kh-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(197,146,46,0.3);
}

.kh-ai-header-text {
  flex: 1;
  min-width: 0;
}

.kh-ai-title {
  font-size: var(--kh-text-base);
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  color: var(--kh-primary-foreground);
}

.kh-ai-status {
  font-size: var(--kh-text-xs);
  opacity: 0.8;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 3px;
}

.kh-ai-status-dot {
  width: 7px;
  height: 7px;
  background-color: var(--kh-success);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px var(--kh-success);
}

.kh-ai-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: var(--kh-primary-foreground);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--kh-dur-fast) var(--kh-ease);
  flex-shrink: 0;
}
.kh-ai-close:hover { background: rgba(255,255,255,0.22); }

/* Messages area */
.kh-ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-color: var(--kh-gray-50);
}

.kh-ai-msg {
  display: flex;
  gap: 8px;
  max-width: 85%;
  animation: khMsgIn 0.3s var(--kh-ease-out);
}

@keyframes khMsgIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.kh-ai-msg-bot { align-self: flex-start; }
.kh-ai-msg-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.kh-ai-msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
  font-weight: 600;
}

.kh-ai-msg-user .kh-ai-msg-avatar {
  background-color: var(--kh-gray-500);
}

.kh-ai-msg-bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: var(--kh-text-sm);
  line-height: 1.6;
  word-break: break-word;
}

/* AI msg bubble — light warm gray */
.kh-ai-msg-bot .kh-ai-msg-bubble {
  background-color: var(--kh-gray-100);
  color: var(--kh-gray-800);
  border-bottom-left-radius: 4px;
}

/* User msg bubble — deep navy */
.kh-ai-msg-user .kh-ai-msg-bubble {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-bottom-right-radius: 4px;
}

.kh-ai-quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 16px 0;
}

.kh-ai-quick-btn {
  padding: 6px 12px;
  font-size: var(--kh-text-xs);
  color: var(--kh-brand-700);
  background-color: var(--kh-brand-50);
  border: 1px solid var(--kh-brand-200);
  border-radius: var(--kh-radius-full);
  cursor: pointer;
  transition: all var(--kh-dur-fast) var(--kh-ease);
}
.kh-ai-quick-btn:hover {
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  border-color: var(--kh-brand-800);
}

/* Input area */
.kh-ai-input-area {
  padding: 12px;
  border-top: 1px solid var(--kh-border);
  background-color: var(--kh-card);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.kh-ai-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--kh-border);
  border-radius: 20px;
  font-size: var(--kh-text-sm);
  background-color: var(--kh-gray-50);
  resize: none;
  max-height: 100px;
  min-height: 40px;
  line-height: 1.4;
  transition: border-color var(--kh-dur-fast) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease),
              box-shadow var(--kh-dur-fast) var(--kh-ease);
  outline: none;
  font-family: inherit;
}
.kh-ai-input:focus {
  border-color: var(--kh-input-focus);
  background-color: var(--kh-card);
  box-shadow: 0 0 0 3px var(--kh-ring);
}

.kh-ai-send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--kh-cta);
  color: var(--kh-primary-foreground);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color var(--kh-dur-fast) var(--kh-ease),
              transform var(--kh-dur-fast) var(--kh-ease);
  box-shadow: var(--kh-shadow-cta);
}
.kh-ai-send:hover {
  background-color: var(--kh-cta-hover);
  transform: scale(1.05);
}
.kh-ai-send:disabled {
  background-color: var(--kh-gray-300);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.kh-ai-footer-note {
  text-align: center;
  font-size: 10px;
  color: var(--kh-gray-400);
  padding: 4px 12px 10px;
}

@media (max-width: 480px) {
  .kh-ai-widget { right: 12px; bottom: 16px; }
  .kh-ai-panel {
    position: fixed;
    right: 12px;
    bottom: 80px;
    left: 12px;
    width: auto;
    height: 70vh;
  }
  .kh-ai-launcher {
    width: 52px;
    height: 52px;
  }
  .kh-ai-launcher .kh-ai-icon { width: 22px; height: 22px; }
}

/* =================================================================
   29. CONTACT PAGE
   ================================================================= */
.kh-contact-hero {
  background: linear-gradient(135deg, var(--kh-brand-900) 0%, var(--kh-brand-800) 60%, var(--kh-brand-700) 100%);
  color: var(--kh-primary-foreground);
  padding: 64px 0 56px;
  position: relative;
  overflow: hidden;
}
.kh-contact-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(197,146,46,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.kh-contact-hero > * { position: relative; z-index: 1; }

.kh-contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 768px) {
  .kh-contact-grid { grid-template-columns: 1fr 1.3fr; gap: 48px; }
}

.kh-contact-info-card {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 28px;
  box-shadow: var(--kh-shadow-sm);
}

.kh-contact-info-title {
  font-size: var(--kh-text-lg);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--kh-border);
}

.kh-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--kh-border);
}
.kh-contact-item:last-child { border-bottom: none; }

.kh-contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--kh-radius-md);
  background-color: var(--kh-cta-soft);
  color: var(--kh-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.kh-contact-item-icon .kh-icon { width: 20px; height: 20px; }

.kh-contact-item-label {
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
  margin-bottom: 2px;
}
.kh-contact-item-value {
  font-size: var(--kh-text-base);
  font-weight: 500;
  color: var(--kh-gray-800);
}
.kh-contact-item-value a {
  color: inherit;
  transition: color var(--kh-dur-fast) var(--kh-ease);
}
.kh-contact-item-value a:hover { color: var(--kh-cta); }

.kh-contact-form-card {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 28px;
  box-shadow: var(--kh-shadow-sm);
}

.kh-contact-form-title {
  font-size: var(--kh-text-lg);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 8px;
}
.kh-contact-form-sub {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-500);
  margin-bottom: 22px;
}

/* =================================================================
   30. ABOUT PAGE
   ================================================================= */
.kh-about-intro {
  padding: 56px 0;
  background-color: var(--kh-background);
}

.kh-about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
@media (min-width: 900px) {
  .kh-about-grid { grid-template-columns: 1.2fr 1fr; gap: 56px; }
}

.kh-about-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--kh-cta);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding: 4px 12px;
  background-color: var(--kh-cta-soft);
  border-radius: var(--kh-radius-sm);
}

.kh-about-title {
  font-size: var(--kh-text-3xl);
  font-weight: 700;
  color: var(--kh-gray-800);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
@media (min-width: 768px) {
  .kh-about-title { font-size: var(--kh-text-4xl); }
}

.kh-about-founded {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-500);
  margin-bottom: 18px;
}
.kh-about-founded .kh-icon {
  width: 14px;
  height: 14px;
  color: var(--kh-cta);
}

.kh-about-desc {
  color: var(--kh-gray-600);
  line-height: 1.8;
  font-size: 0.9375rem;
}

.kh-about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 28px;
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  background-color: var(--kh-card);
}
@media (min-width: 640px) {
  .kh-about-stats { grid-template-columns: repeat(6, 1fr); }
}

.kh-about-image {
  position: relative;
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  box-shadow: var(--kh-shadow-lg);
  aspect-ratio: 4/3;
  background-color: var(--kh-gray-100);
}
.kh-about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.kh-about-image-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background-color: rgba(13,30,56,0.85);
  backdrop-filter: blur(8px);
  color: var(--kh-primary-foreground);
  padding: 6px 14px;
  border-radius: var(--kh-radius-sm);
  font-size: var(--kh-text-sm);
  font-weight: 500;
  border-left: 2px solid var(--kh-cta);
}

/* Values grid */
.kh-values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.kh-value-card {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--kh-dur-med) var(--kh-ease);
}
.kh-value-card:hover {
  box-shadow: var(--kh-shadow-md);
  border-color: var(--kh-brand-200);
  transform: translateY(-3px);
}

.kh-value-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--kh-radius-lg);
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-700);
  display: flex;
  align-items: center;
  justify-content: center;
}
.kh-value-icon .kh-icon { width: 28px; height: 28px; }

/* Facilities grid */
.kh-facilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (min-width: 768px) {
  .kh-facilities-grid { grid-template-columns: repeat(4, 1fr); }
}

.kh-facility-card {
  margin: 0;
  border-radius: var(--kh-radius-lg);
  overflow: hidden;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  transition: all var(--kh-dur-med) var(--kh-ease);
}
.kh-facility-card:hover {
  box-shadow: var(--kh-shadow-md);
  transform: translateY(-3px);
}
.kh-facility-img {
  aspect-ratio: 4/3;
  background-color: var(--kh-gray-100);
  overflow: hidden;
}
.kh-facility-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--kh-dur-slow) var(--kh-ease-out);
}
.kh-facility-card:hover .kh-facility-img img { transform: scale(1.05); }

.kh-facility-caption {
  padding: 14px 16px;
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-gray-700);
  text-align: center;
  background-color: var(--kh-card);
}

/* Timeline */
.kh-timeline {
  position: relative;
  padding-left: 32px;
}
.kh-timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--kh-cta) 0%, var(--kh-brand-200) 100%);
  border-radius: 1px;
}

.kh-timeline-item {
  position: relative;
  padding-bottom: 28px;
}
.kh-timeline-item:last-child { padding-bottom: 0; }

.kh-timeline-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--kh-card);
  border: 3px solid var(--kh-cta);
  box-shadow: 0 0 0 4px var(--kh-cta-soft);
}

.kh-timeline-card {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 18px 20px;
  transition: all var(--kh-dur-med) var(--kh-ease);
}
.kh-timeline-card:hover {
  box-shadow: var(--kh-shadow-md);
  border-color: var(--kh-brand-200);
}

.kh-timeline-year {
  font-size: var(--kh-text-xl);
  font-weight: 700;
  color: var(--kh-brand-800);
  margin-bottom: 6px;
  font-feature-settings: "tnum" 1;
}
.kh-timeline-text {
  color: var(--kh-gray-600);
  line-height: 1.7;
  margin: 0;
  font-size: var(--kh-text-sm);
}

/* Certs */
.kh-certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}
.kh-cert-item {
  text-align: center;
  padding: 24px 16px;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  transition: all var(--kh-dur-med) var(--kh-ease);
}
.kh-cert-item:hover {
  box-shadow: var(--kh-shadow-md);
  border-color: var(--kh-brand-200);
}
.kh-cert-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  color: var(--kh-cta);
}
.kh-cert-name {
  font-size: var(--kh-text-sm);
  font-weight: 500;
  color: var(--kh-gray-700);
}

/* =================================================================
   31. SERVICES PAGE
   ================================================================= */
.kh-services-hero {
  background: linear-gradient(135deg, var(--kh-brand-900) 0%, var(--kh-brand-800) 60%, var(--kh-brand-700) 100%);
  color: var(--kh-primary-foreground);
  padding: 64px 0 56px;
  position: relative;
  overflow: hidden;
}
.kh-services-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 30%, rgba(197,146,46,0.1) 0%, transparent 50%),
    linear-gradient(180deg, transparent 0%, rgba(13,30,56,0.3) 100%);
  pointer-events: none;
}
.kh-services-hero > * { position: relative; z-index: 1; }

.kh-services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .kh-services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .kh-services-grid { grid-template-columns: repeat(3, 1fr); }
}

.kh-service-card-full {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 28px;
  transition: all var(--kh-dur-med) var(--kh-ease);
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-top: 3px solid var(--kh-brand-600);
}
.kh-service-card-full:hover {
  box-shadow: var(--kh-shadow-md);
  border-top-color: var(--kh-cta);
  transform: translateY(-3px);
}

.kh-service-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--kh-radius-md);
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-700);
  display: flex;
  align-items: center;
  justify-content: center;
}
.kh-service-card-icon .kh-icon { width: 26px; height: 26px; }

.kh-service-card-title {
  font-size: var(--kh-text-lg);
  font-weight: 600;
  color: var(--kh-gray-800);
}

.kh-service-card-desc {
  color: var(--kh-gray-600);
  line-height: 1.7;
  font-size: var(--kh-text-sm);
  flex: 1;
}

.kh-service-card-features {
  list-style: none;
  padding: 0;
  margin: 0;
}
.kh-service-card-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 5px 0;
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-700);
}
.kh-service-card-features li::before {
  content: '';
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  background-color: var(--kh-cta-soft);
  border-radius: 50%;
  position: relative;
}
.kh-service-card-features li::after {
  content: '';
  position: absolute;
  width: 4px;
  height: 8px;
  border: solid var(--kh-cta);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-top: 6px;
  margin-left: -24px;
}

/* CRO/CDMO Process flow */
.kh-process-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
}
@media (min-width: 768px) {
  .kh-process-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.kh-process-step {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}
.kh-process-step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--kh-brand-800);
  color: var(--kh-primary-foreground);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--kh-text-lg);
  font-weight: 700;
  margin: 0 auto 14px;
  font-feature-settings: "tnum" 1;
}
.kh-process-step:nth-child(even) .kh-process-step-num {
  background-color: var(--kh-cta);
}
.kh-process-step-title {
  font-size: var(--kh-text-base);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 6px;
}
.kh-process-step-desc {
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-500);
  line-height: 1.6;
}

/* =================================================================
   32. FILTER SIDEBAR (steel-tinted)
   ================================================================= */
.kh-filter-sidebar {
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-radius: var(--kh-radius-lg);
  padding: 20px;
}

.kh-filter-group {
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--kh-border);
}
.kh-filter-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.kh-filter-group-title {
  font-size: var(--kh-text-sm);
  font-weight: 600;
  color: var(--kh-gray-800);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.kh-filter-group-title .kh-icon {
  width: 16px;
  height: 16px;
  color: var(--kh-brand-700);
}

.kh-filter-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.kh-filter-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-700);
  border-radius: var(--kh-radius-sm);
  cursor: pointer;
  transition: all var(--kh-dur-fast) var(--kh-ease);
  background-color: var(--kh-steel-50);
  margin-bottom: 4px;
  border: 1px solid transparent;
}
.kh-filter-item:hover {
  background-color: var(--kh-steel-100);
  color: var(--kh-brand-800);
}
.kh-filter-item.is-active {
  background-color: var(--kh-brand-50);
  color: var(--kh-brand-800);
  font-weight: 500;
  border-color: var(--kh-brand-200);
}

.kh-filter-count {
  margin-left: auto;
  font-size: var(--kh-text-xs);
  color: var(--kh-gray-500);
  font-family: var(--kh-font-mono);
}

/* Products layout with sidebar */
.kh-products-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 1024px) {
  .kh-products-layout {
    grid-template-columns: 260px 1fr;
    gap: 32px;
  }
}

/* =================================================================
   33. TOAST / NOTIFICATION
   ================================================================= */
.kh-toast-wrap {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  width: calc(100% - 32px);
  max-width: 420px;
}

.kh-toast {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  background-color: var(--kh-card);
  border: 1px solid var(--kh-border);
  border-left: 4px solid var(--kh-brand-800);
  border-radius: var(--kh-radius-md);
  box-shadow: var(--kh-shadow-lg);
  font-size: var(--kh-text-sm);
  color: var(--kh-gray-800);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(-12px);
  animation: khToastIn var(--kh-dur-med) var(--kh-ease-out) forwards;
}

.kh-toast.is-leaving {
  animation: khToastOut var(--kh-dur-med) var(--kh-ease) forwards;
}

.kh-toast-success { border-left-color: var(--kh-success); }
.kh-toast-error   { border-left-color: var(--kh-error); }
.kh-toast-warning { border-left-color: var(--kh-warning); }
.kh-toast-info    { border-left-color: var(--kh-info); }

.kh-toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}
.kh-toast-success .kh-toast-icon { color: var(--kh-success); }
.kh-toast-error   .kh-toast-icon { color: var(--kh-error); }
.kh-toast-warning .kh-toast-icon { color: var(--kh-warning); }
.kh-toast-info    .kh-toast-icon { color: var(--kh-info); }

.kh-toast-content {
  flex: 1;
  line-height: 1.5;
}
.kh-toast-title {
  font-weight: 600;
  margin-bottom: 2px;
}

.kh-toast-close {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kh-gray-400);
  border-radius: var(--kh-radius-sm);
  transition: color var(--kh-dur-fast) var(--kh-ease),
              background-color var(--kh-dur-fast) var(--kh-ease);
}
.kh-toast-close:hover {
  color: var(--kh-gray-700);
  background-color: var(--kh-gray-100);
}

@keyframes khToastIn  { to { opacity: 1; transform: translateY(0); } }
@keyframes khToastOut { to { opacity: 0; transform: translateY(-12px); } }

/* =================================================================
   34. DIVIDER
   ================================================================= */
.kh-divider {
  height: 1px;
  background-color: var(--kh-border);
  border: none;
  margin: 24px 0;
}

/* =================================================================
   35. LOADING / SKELETON / SPINNER
   ================================================================= */
.kh-skeleton {
  background: linear-gradient(90deg, var(--kh-gray-100) 25%, var(--kh-gray-200) 50%, var(--kh-gray-100) 75%);
  background-size: 200% 100%;
  animation: khSkeleton 1.4s ease infinite;
  border-radius: var(--kh-radius-sm);
}

@keyframes khSkeleton {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.kh-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: khSpin 0.7s linear infinite;
}

@keyframes khSpin {
  to { transform: rotate(360deg); }
}

/* =================================================================
   36. BACKDROP
   ================================================================= */
.kh-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(13, 30, 56, 0.55);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--kh-dur-med) var(--kh-ease),
              visibility var(--kh-dur-med) var(--kh-ease);
  backdrop-filter: blur(2px);
}

.kh-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

/* =================================================================
   37. PAGE BANNER (generic inner page)
   ================================================================= */
.kh-page-banner {
  background: linear-gradient(135deg, var(--kh-brand-900) 0%, var(--kh-brand-800) 60%, var(--kh-brand-700) 100%);
  color: var(--kh-primary-foreground);
  padding: 56px 0 48px;
  position: relative;
  overflow: hidden;
}
.kh-page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 40%, rgba(197,146,46,0.08) 0%, transparent 55%),
    linear-gradient(rgba(220,228,240,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(220,228,240,0.03) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  pointer-events: none;
}
.kh-page-banner > * { position: relative; z-index: 1; }

.kh-page-banner-title {
  font-size: var(--kh-text-3xl);
  font-weight: 700;
  color: var(--kh-primary-foreground);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.kh-page-banner-subtitle {
  font-size: var(--kh-text-base);
  color: var(--kh-brand-100);
  opacity: 0.85;
}

/* =================================================================
   38. CTA BANNER (section call-to-action)
   ================================================================= */
.kh-cta-banner {
  background: linear-gradient(135deg, var(--kh-brand-800) 0%, var(--kh-brand-900) 100%);
  border-radius: var(--kh-radius-xl);
  padding: 48px 32px;
  text-align: center;
  color: var(--kh-primary-foreground);
  position: relative;
  overflow: hidden;
  margin-block: 56px;
}
.kh-cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(197,146,46,0.15) 0%, transparent 60%);
}
.kh-cta-banner > * { position: relative; z-index: 1; }

.kh-cta-banner-title {
  font-size: var(--kh-text-2xl);
  font-weight: 700;
  color: var(--kh-primary-foreground);
  margin-bottom: 10px;
}
.kh-cta-banner-desc {
  color: var(--kh-brand-100);
  margin-bottom: 24px;
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

/* =================================================================
   39. ACCESSIBILITY: REDUCED MOTION
   ================================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =================================================================
   40. RESPONSIVE TWEAKS
   ================================================================= */
@media (max-width: 480px) {
  body { font-size: 0.875rem; }
  .kh-section { padding-block: 36px; }
  .kh-section-lg { padding-block: 48px; }
  .kh-container { padding-inline: 14px; }
  .kh-nav-inner { height: 60px; }
  .kh-hero { padding: 56px 0 56px; }
  .kh-hero-title { font-size: var(--kh-text-2xl); }
  .kh-hero-subtitle { font-size: var(--kh-text-base); }
  .kh-btn { padding: 9px 18px; }
  .kh-btn-lg { padding: 12px 24px; font-size: var(--kh-text-base); }
  .kh-card { padding: 16px; }
  .kh-card-body { padding: 16px; }
  .kh-footer-main { padding-bottom: 28px; }
  .kh-stats-overlap-inner { padding: 20px 14px; }
  .kh-about-stats { grid-template-columns: repeat(2, 1fr); }
  .kh-stat-cell:nth-child(2n) { border-right: none; }
}

/* Very small screens (360px) */
@media (max-width: 380px) {
  .kh-hero-title { font-size: 1.5rem; }
  .kh-btn { padding: 8px 14px; font-size: 0.8125rem; }
  .kh-product-grid { gap: 12px; }
  .kh-blog-grid { gap: 16px; }
}

/* === Mobile QR Code Click Toggle (手机端二维码点击显示) === */
@media (max-width: 1279px) {
  /* 手机端：点击显示二维码（data-qrcode-toggle属性触发） */
  .kh-float-btn[data-qrcode-toggle] .kh-float-qrcode {
    display: none;
  }
  .kh-float-btn[data-qrcode-toggle].is-qrcode-open .kh-float-qrcode {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(8px);
    display: block;
  }
  /* 手机端弹窗位置：移到按钮下方，居中对齐 */
  .kh-float-btn[data-qrcode-toggle].is-qrcode-open .kh-float-qrcode {
    right: 50%;
    left: auto;
    bottom: calc(100% + 8px);
    top: auto;
    transform: translateX(-50%) translateY(8px);
  }
}

/* 手机端微信QQ按钮样式优化 */
@media (max-width: 639px) {
  .kh-float-btn.kh-float-btn-wechat,
  .kh-float-btn.kh-float-btn-qq {
    background-color: var(--kh-card);
    color: var(--kh-gray-700);
  }
  .kh-float-btn.kh-float-btn-wechat:hover,
  .kh-float-btn.kh-float-btn-qq:hover {
    background-color: #07c160;
    color: white;
  }
  .kh-float-btn.kh-float-btn-qq:hover {
    background-color: #1976d2;
  }
}

/* QQ按钮颜色 */
.kh-float-btn.kh-float-btn-qq {
  background-color: var(--kh-card);
  color: var(--kh-gray-700);
}
.kh-float-btn.kh-float-btn-qq:hover {
  background-color: #1976d2;
  color: white;
}
.kh-float-btn.kh-float-btn-wechat {
  background-color: var(--kh-card);
  color: var(--kh-gray-700);
}
.kh-float-btn.kh-float-btn-wechat:hover {
  background-color: #07c160;
  color: white;
}