/* ============================================================
   黄色仓库 - 工业五金建材B2B供应链平台
   CSS Design System - hk- prefix
   Mobile-First Responsive Design
   ============================================================ */

/* === CSS Variables === */
:root {
  --hk-yellow: #FFBE00;
  --hk-yellow-dark: #E5AB00;
  --hk-yellow-light: #FFF3CC;
  --hk-gray: #5A5A5A;
  --hk-gray-dark: #333333;
  --hk-gray-light: #F5F5F5;
  --hk-blue: #007BFF;
  --hk-blue-dark: #0056B3;
  --hk-white: #FFFFFF;
  --hk-black: #1A1A1A;
  --hk-border: #E0E0E0;
  --hk-shadow: 0 2px 8px rgba(0,0,0,0.12);
  --hk-shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  --hk-radius: 4px;
  --hk-radius-lg: 8px;
  --hk-transition: all 0.3s ease;
  --hk-font-title: 'Oswald', 'Impact', 'Arial Black', sans-serif;
  --hk-font-body: 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--hk-font-body);
  color: var(--hk-gray-dark);
  background-color: var(--hk-white);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--hk-blue);
  text-decoration: none;
  transition: var(--hk-transition);
}

a:hover {
  color: var(--hk-yellow);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--hk-font-title);
  color: var(--hk-gray-dark);
  line-height: 1.3;
  font-weight: 700;
}

ul, ol {
  list-style: none;
}

/* === Layout Container === */
.hk-container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px;
}

.hk-section {
  padding: 40px 0;
}

.hk-section-title {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 8px;
  position: relative;
  padding-bottom: 16px;
}

.hk-section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--hk-yellow);
  margin: 12px auto 0;
  border-radius: 2px;
}

.hk-section-subtitle {
  text-align: center;
  color: var(--hk-gray);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

/* === Header / Navigation === */
.hk-header {
  background: var(--hk-gray-dark);
  padding: 0;
  z-index: 100;
  /* NO sticky/fixed per requirement */
}

.hk-header-top {
  background: var(--hk-black);
  padding: 6px 0;
  font-size: 0.8rem;
  color: #999;
}

.hk-header-top .hk-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hk-header-top a {
  color: #ccc;
  font-size: 0.8rem;
}

.hk-header-top a:hover {
  color: var(--hk-yellow);
}

.hk-nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.hk-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

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

.hk-logo-text {
  font-family: var(--hk-font-title);
  font-size: 1.3rem;
  color: var(--hk-yellow);
  font-weight: 700;
  letter-spacing: 1px;
  white-space: nowrap;
}

.hk-logo-domain {
  display: block;
  font-size: 0.7rem;
  color: #999;
  font-family: var(--hk-font-body);
  font-weight: 400;
  letter-spacing: 0;
}

.hk-nav {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--hk-gray-dark);
  z-index: 99;
  border-top: 2px solid var(--hk-yellow);
}

.hk-nav.hk-nav-active {
  display: flex;
}

.hk-nav-link {
  display: block;
  padding: 14px 20px;
  color: var(--hk-white);
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: relative;
  transition: var(--hk-transition);
}

.hk-nav-link:hover,
.hk-nav-link.hk-active {
  color: var(--hk-yellow);
  background: rgba(255,190,0,0.08);
}

.hk-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--hk-yellow);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.hk-nav-link:hover::after {
  transform: scaleX(1);
}

.hk-nav-right {
  display: none;
}

/* Hamburger Menu */
.hk-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hk-hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--hk-white);
  border-radius: 2px;
  transition: var(--hk-transition);
}

.hk-hamburger.hk-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.hk-hamburger.hk-active span:nth-child(2) {
  opacity: 0;
}

.hk-hamburger.hk-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* Search Bar */
.hk-search-bar {
  display: flex;
  align-items: center;
  background: var(--hk-white);
  border-radius: var(--hk-radius);
  overflow: hidden;
  max-width: 100%;
}

.hk-search-bar input {
  border: none;
  padding: 10px 14px;
  font-size: 0.9rem;
  outline: none;
  width: 100%;
  min-width: 0;
  font-family: var(--hk-font-body);
}

.hk-search-bar button {
  background: var(--hk-yellow);
  border: none;
  padding: 10px 18px;
  cursor: pointer;
  font-weight: 700;
  color: var(--hk-gray-dark);
  white-space: nowrap;
  transition: var(--hk-transition);
}

.hk-search-bar button:hover {
  background: var(--hk-yellow-dark);
}

.hk-btn-login {
  display: inline-block;
  padding: 8px 18px;
  background: transparent;
  border: 1px solid var(--hk-yellow);
  color: var(--hk-yellow);
  border-radius: var(--hk-radius);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--hk-transition);
  white-space: nowrap;
}

.hk-btn-login:hover {
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
}

/* === Hero Banner === */
.hk-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 300px;
  display: flex;
  align-items: center;
}

.hk-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.85) 0%, rgba(26,26,26,0.5) 100%);
}

.hk-hero-content {
  position: relative;
  z-index: 2;
  color: var(--hk-white);
  padding: 40px 0;
}

.hk-hero-title {
  font-size: 1.8rem;
  color: var(--hk-white);
  margin-bottom: 12px;
  line-height: 1.2;
}

.hk-hero-title span {
  color: var(--hk-yellow);
}

.hk-hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
  max-width: 600px;
}

.hk-btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: var(--hk-radius);
  cursor: pointer;
  transition: var(--hk-transition);
  text-align: center;
}

.hk-btn:hover {
  background: var(--hk-yellow-dark);
  color: var(--hk-gray-dark);
  transform: translateY(-2px);
  box-shadow: var(--hk-shadow);
}

.hk-btn-outline {
  background: transparent;
  border: 2px solid var(--hk-yellow);
  color: var(--hk-yellow);
}

.hk-btn-outline:hover {
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
}

.hk-btn-blue {
  background: var(--hk-blue);
  color: var(--hk-white);
}

.hk-btn-blue:hover {
  background: var(--hk-blue-dark);
  color: var(--hk-white);
}

/* === Category Matrix === */
.hk-category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.hk-category-card {
  position: relative;
  border-radius: var(--hk-radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  transition: var(--hk-transition);
}

.hk-category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--hk-shadow-lg);
}

.hk-category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hk-category-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,26,26,0.8) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
}

.hk-category-card-title {
  color: var(--hk-white);
  font-size: 1rem;
  font-weight: 700;
}

.hk-category-card-count {
  color: var(--hk-yellow);
  font-size: 0.8rem;
  margin-top: 4px;
}

/* === Brand Wall === */
.hk-brand-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.hk-brand-item {
  background: var(--hk-gray-light);
  border-radius: var(--hk-radius);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70px;
  transition: var(--hk-transition);
  border: 1px solid var(--hk-border);
  font-weight: 700;
  color: var(--hk-gray);
  font-size: 0.85rem;
  text-align: center;
}

.hk-brand-item:hover {
  border-color: var(--hk-yellow);
  box-shadow: var(--hk-shadow);
  color: var(--hk-gray-dark);
}

/* === Bulk Purchase Banner === */
.hk-bulk-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  border-radius: var(--hk-radius-lg);
  overflow: hidden;
  margin: 0;
}

.hk-bulk-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.88) 0%, rgba(26,26,26,0.6) 100%);
}

.hk-bulk-content {
  position: relative;
  z-index: 2;
  padding: 40px 20px;
  text-align: center;
  color: var(--hk-white);
}

.hk-bulk-content h2 {
  color: var(--hk-yellow);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.hk-bulk-content p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
}

/* === Arrival Ticker === */
.hk-ticker-wrap {
  background: var(--hk-gray-dark);
  border-radius: var(--hk-radius-lg);
  padding: 20px;
  overflow: hidden;
}

.hk-ticker-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.hk-ticker-dot {
  width: 10px;
  height: 10px;
  background: var(--hk-yellow);
  border-radius: 50%;
  animation: hk-blink 1.5s infinite;
}

@keyframes hk-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hk-ticker-header span {
  color: var(--hk-yellow);
  font-weight: 700;
  font-size: 0.9rem;
}

.hk-ticker-list {
  max-height: 200px;
  overflow: hidden;
}

.hk-ticker-item {
  display: flex;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  font-size: 0.85rem;
}

.hk-ticker-tag {
  display: inline-block;
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 10px;
  white-space: nowrap;
}

/* === Solution Cards === */
.hk-solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.hk-solution-card {
  border-radius: var(--hk-radius-lg);
  overflow: hidden;
  box-shadow: var(--hk-shadow);
  transition: var(--hk-transition);
  background: var(--hk-white);
}

.hk-solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--hk-shadow-lg);
}

.hk-solution-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.hk-solution-card-body {
  padding: 20px;
}

.hk-solution-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.hk-solution-card-body p {
  color: var(--hk-gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* === Case Carousel === */
.hk-case-carousel {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 16px;
}

.hk-case-carousel::-webkit-scrollbar {
  height: 6px;
}

.hk-case-carousel::-webkit-scrollbar-track {
  background: var(--hk-gray-light);
  border-radius: 3px;
}

.hk-case-carousel::-webkit-scrollbar-thumb {
  background: var(--hk-yellow);
  border-radius: 3px;
}

.hk-case-card {
  min-width: 280px;
  max-width: 350px;
  flex-shrink: 0;
  scroll-snap-align: start;
  border-radius: var(--hk-radius-lg);
  overflow: hidden;
  box-shadow: var(--hk-shadow);
  background: var(--hk-white);
}

.hk-case-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.hk-case-card-body {
  padding: 16px;
}

.hk-case-card-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.hk-case-card-body p {
  font-size: 0.85rem;
  color: var(--hk-gray);
}

/* === Dashboard Panel === */
.hk-dashboard {
  background: linear-gradient(135deg, var(--hk-gray-dark) 0%, var(--hk-black) 100%);
  border-radius: var(--hk-radius-lg);
  padding: 30px 20px;
}

.hk-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.hk-dashboard-item {
  text-align: center;
  padding: 16px;
  border: 1px solid rgba(255,190,0,0.2);
  border-radius: var(--hk-radius);
  background: rgba(255,255,255,0.03);
}

.hk-dashboard-number {
  font-family: var(--hk-font-title);
  font-size: 1.8rem;
  color: var(--hk-yellow);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.hk-dashboard-label {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
}

.hk-dashboard-unit {
  font-size: 0.9rem;
  color: var(--hk-yellow);
}

/* === Partner Section === */
.hk-partner-group {
  margin-bottom: 24px;
}

.hk-partner-group-title {
  font-size: 1rem;
  color: var(--hk-gray);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--hk-yellow);
}

.hk-partner-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hk-partner-item {
  background: var(--hk-gray-light);
  padding: 12px 20px;
  border-radius: var(--hk-radius);
  font-size: 0.85rem;
  color: var(--hk-gray);
  border: 1px solid var(--hk-border);
}

/* === Footer === */
.hk-footer {
  background: var(--hk-gray-dark);
  color: rgba(255,255,255,0.7);
  padding-top: 40px;
}

.hk-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.hk-footer-col h3 {
  color: var(--hk-yellow);
  font-size: 1rem;
  margin-bottom: 16px;
  font-family: var(--hk-font-body);
}

.hk-footer-col p,
.hk-footer-col li {
  font-size: 0.85rem;
  line-height: 2;
  color: rgba(255,255,255,0.6);
}

.hk-footer-col a {
  color: rgba(255,255,255,0.6);
}

.hk-footer-col a:hover {
  color: var(--hk-yellow);
}

.hk-footer-honors {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.hk-honor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.hk-honor-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  padding: 6px 12px;
  border: 1px solid rgba(255,190,0,0.2);
  border-radius: var(--hk-radius);
  background: rgba(255,190,0,0.05);
}

.hk-honor-icon {
  font-size: 1rem;
}

.hk-footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
}

.hk-footer-bottom p {
  margin-bottom: 4px;
}

.hk-auth-number {
  color: var(--hk-yellow);
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: 8px;
  display: inline-block;
  padding: 4px 16px;
  border: 1px solid var(--hk-yellow);
  border-radius: var(--hk-radius);
}

/* === Breadcrumb === */
.hk-breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--hk-gray);
}

.hk-breadcrumb a {
  color: var(--hk-gray);
}

.hk-breadcrumb a:hover {
  color: var(--hk-yellow);
}

.hk-breadcrumb span {
  margin: 0 6px;
  color: #ccc;
}

/* === Product Grid === */
.hk-product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.hk-product-card {
  border: 1px solid var(--hk-border);
  border-radius: var(--hk-radius-lg);
  overflow: hidden;
  transition: var(--hk-transition);
  background: var(--hk-white);
}

.hk-product-card:hover {
  border-color: var(--hk-yellow);
  box-shadow: var(--hk-shadow);
  transform: translateY(-2px);
}

.hk-product-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.hk-product-card-body {
  padding: 12px;
}

.hk-product-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--hk-gray-dark);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hk-product-card-sku {
  font-size: 0.75rem;
  color: var(--hk-gray);
  margin-bottom: 6px;
}

.hk-product-card-price {
  font-size: 1.1rem;
  color: #D32F2F;
  font-weight: 700;
}

.hk-product-card-price small {
  font-size: 0.75rem;
  color: var(--hk-gray);
  font-weight: 400;
  text-decoration: line-through;
  margin-left: 6px;
}

/* === Content Page === */
.hk-content-area {
  padding: 30px 0;
}

.hk-content-area h2 {
  font-size: 1.3rem;
  margin: 24px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--hk-yellow);
  display: inline-block;
}

.hk-content-area h3 {
  font-size: 1.1rem;
  margin: 20px 0 10px;
  padding-left: 12px;
  border-left: 3px solid var(--hk-yellow);
}

.hk-content-area p {
  margin-bottom: 16px;
  text-indent: 2em;
  line-height: 1.8;
}

.hk-content-area table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.hk-content-area table th {
  background: var(--hk-gray-dark);
  color: var(--hk-white);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
}

.hk-content-area table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--hk-border);
}

.hk-content-area table tr:hover td {
  background: var(--hk-yellow-light);
}

/* === Form Styles === */
.hk-form-group {
  margin-bottom: 20px;
}

.hk-form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--hk-gray-dark);
}

.hk-form-group label .hk-required {
  color: #D32F2F;
  margin-left: 2px;
}

.hk-form-input,
.hk-form-select,
.hk-form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--hk-border);
  border-radius: var(--hk-radius);
  font-size: 0.9rem;
  font-family: var(--hk-font-body);
  transition: var(--hk-transition);
  background: var(--hk-white);
}

.hk-form-input:focus,
.hk-form-select:focus,
.hk-form-textarea:focus {
  outline: none;
  border-color: var(--hk-yellow);
  box-shadow: 0 0 0 3px rgba(255,190,0,0.15);
}

.hk-form-textarea {
  min-height: 120px;
  resize: vertical;
}

.hk-form-file {
  padding: 20px;
  border: 2px dashed var(--hk-border);
  border-radius: var(--hk-radius);
  text-align: center;
  cursor: pointer;
  transition: var(--hk-transition);
  color: var(--hk-gray);
  font-size: 0.85rem;
}

.hk-form-file:hover {
  border-color: var(--hk-yellow);
  background: var(--hk-yellow-light);
}

/* === Inquiry Flow Steps === */
.hk-flow-steps {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}

.hk-flow-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--hk-gray-light);
  border-radius: var(--hk-radius);
  font-size: 0.85rem;
  font-weight: 600;
}

.hk-flow-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
}

.hk-flow-arrow {
  color: var(--hk-gray);
  font-size: 1.2rem;
}

/* === App Download Page === */
.hk-app-hero {
  background: linear-gradient(135deg, var(--hk-gray-dark) 0%, var(--hk-black) 100%);
  padding: 50px 0;
  text-align: center;
}

.hk-app-mockup {
  max-width: 280px;
  margin: 0 auto 30px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--hk-shadow-lg);
}

.hk-app-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hk-app-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--hk-radius-lg);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--hk-transition);
  position: relative;
  overflow: hidden;
}

.hk-app-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: hk-shine 3s infinite;
}

@keyframes hk-shine {
  0% { left: -100%; }
  50% { left: 100%; }
  100% { left: 100%; }
}

.hk-app-btn-ios {
  background: var(--hk-white);
  color: var(--hk-gray-dark);
}

.hk-app-btn-android {
  background: var(--hk-yellow);
  color: var(--hk-gray-dark);
}

/* === Feature Grid === */
.hk-feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.hk-feature-item {
  text-align: center;
  padding: 24px 16px;
  border: 1px solid var(--hk-border);
  border-radius: var(--hk-radius-lg);
  transition: var(--hk-transition);
}

.hk-feature-item:hover {
  border-color: var(--hk-yellow);
  box-shadow: var(--hk-shadow);
}

.hk-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.hk-feature-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.hk-feature-item p {
  font-size: 0.85rem;
  color: var(--hk-gray);
}

/* === Alert / Modal === */
.hk-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.hk-modal-overlay.hk-show {
  display: flex;
}

.hk-modal {
  background: var(--hk-white);
  border-radius: var(--hk-radius-lg);
  padding: 30px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  box-shadow: var(--hk-shadow-lg);
}

.hk-modal-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.hk-modal h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.hk-modal p {
  color: var(--hk-gray);
  margin-bottom: 20px;
  font-size: 0.9rem;
}

/* === Page Header Banner === */
.hk-page-banner {
  background: var(--hk-gray-dark);
  padding: 40px 0;
  text-align: center;
}

.hk-page-banner h1 {
  color: var(--hk-white);
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.hk-page-banner p {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

/* === Responsive Breakpoints === */

/* 768px - Tablet */
@media (min-width: 768px) {
  .hk-container {
    padding: 0 24px;
  }

  .hk-section {
    padding: 60px 0;
  }

  .hk-section-title {
    font-size: 1.8rem;
  }

  .hk-hero {
    min-height: 420px;
  }

  .hk-hero-title {
    font-size: 2.4rem;
  }

  .hk-hero-desc {
    font-size: 1.1rem;
  }

  .hk-category-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .hk-brand-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hk-solution-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hk-dashboard-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hk-dashboard-number {
    font-size: 2.2rem;
  }

  .hk-product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .hk-page-banner h1 {
    font-size: 2.2rem;
  }
}

/* 1024px - Desktop */
@media (min-width: 1024px) {
  .hk-container {
    padding: 0 32px;
  }

  .hk-hamburger {
    display: none;
  }

  .hk-nav {
    display: flex;
    flex-direction: row;
    position: static;
    background: transparent;
    border: none;
    gap: 0;
  }

  .hk-nav-link {
    padding: 12px 14px;
    border-bottom: none;
    font-size: 0.9rem;
  }

  .hk-nav-link::after {
    left: 14px;
    right: 14px;
  }

  .hk-nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hk-hero {
    min-height: 500px;
  }

  .hk-hero-title {
    font-size: 2.8rem;
  }

  .hk-brand-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .hk-product-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hk-footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hk-feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hk-flow-steps {
    flex-wrap: nowrap;
  }
}

/* 1440px - Large Desktop */
@media (min-width: 1440px) {
  .hk-container {
    padding: 0 40px;
  }

  .hk-section {
    padding: 80px 0;
  }

  .hk-hero {
    min-height: 560px;
  }

  .hk-hero-title {
    font-size: 3.2rem;
  }

  .hk-section-title {
    font-size: 2rem;
  }

  .hk-dashboard-number {
    font-size: 2.8rem;
  }
}

/* === Utility Classes === */
.hk-text-center { text-align: center; }
.hk-text-yellow { color: var(--hk-yellow); }
.hk-text-gray { color: var(--hk-gray); }
.hk-mt-20 { margin-top: 20px; }
.hk-mb-20 { margin-bottom: 20px; }
.hk-mt-40 { margin-top: 40px; }
.hk-mb-40 { margin-bottom: 40px; }
.hk-hidden { display: none; }

/* === Animations === */
@keyframes hk-fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hk-animate {
  animation: hk-fadeInUp 0.6s ease forwards;
}

/* === Print Styles === */
@media print {
  .hk-header, .hk-footer, .hk-hamburger {
    display: none;
  }
}