/* ============================================================
   Jiangsu Kaijing Intelligent Equipment Co., Ltd.
   B2B Industrial Lifting Equipment — Standalone Site
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-navy: #0f1629;
  --color-navy-light: #1a2540;
  --color-gold: #c9a96e;
  --color-gold-light: #d4b87a;
  --color-gold-dark: #b8944f;
  --color-white: #ffffff;
  --color-off-white: #f5f4f1;
  --color-gray-100: #f0efe9;
  --color-gray-200: #e0ded7;
  --color-gray-400: #8a887e;
  --color-gray-600: #555350;
  --color-gray-800: #2a2825;
  --font-heading: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
  --radius: 6px;
  --radius-lg: 12px;
  --max-width: 1280px;
  --header-height: 80px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--color-gray-600);
  background: var(--color-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  line-height: 1.2;
  font-weight: 600;
}
h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.15rem; }

.section-title {
  text-align: center;
  margin-bottom: 0.5rem;
}
.section-subtitle {
  text-align: center;
  color: var(--color-gray-400);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 3.5rem;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: transparent;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: var(--color-navy);
  box-shadow: var(--shadow-md);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
}
.logo-img {
  height: 44px;
  width: auto;
  display: block;
}
.logo span { color: var(--color-gold); }

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.25s;
  position: relative;
}
.nav-links a:hover,
.nav-links a.active { color: var(--color-gold); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform 0.3s;
}
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.nav-cta {
  background: var(--color-gold);
  color: var(--color-navy) !important;
  padding: 0.55rem 1.5rem !important;
  border-radius: var(--radius);
  font-weight: 600 !important;
  letter-spacing: 0.01em !important;
  transition: background 0.25s !important;
}
.nav-cta:hover { background: var(--color-gold-light) !important; color: var(--color-navy) !important; }
.nav-cta::after { display: none !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  transition: transform 0.3s, opacity 0.3s;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  background: linear-gradient(135deg, var(--color-navy) 0%, #162040 50%, #1a1e35 100%);
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(201,169,110,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(201,169,110,0.05) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; max-width: 780px; }

.hero-badge {
  display: inline-block;
  background: rgba(201,169,110,0.12);
  border: 1px solid rgba(201,169,110,0.25);
  color: var(--color-gold);
  padding: 0.35rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-bottom: 1.8rem;
}
.hero h1 {
  color: var(--color-white);
  margin-bottom: 1.2rem;
}
.hero h1 span { color: var(--color-gold); }
.hero p {
  color: rgba(255,255,255,0.7);
  font-size: 1.12rem;
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  letter-spacing: 0.02em;
  transition: all 0.3s;
}
.btn-primary {
  background: var(--color-gold);
  color: var(--color-navy);
}
.btn-primary:hover { background: var(--color-gold-light); transform: translateY(-1px); box-shadow: 0 6px 24px rgba(201,169,110,0.3); }
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.3);
  color: var(--color-white);
}
.btn-outline:hover { border-color: var(--color-gold); color: var(--color-gold); }

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.4);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  animation: float 2.5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: var(--color-navy);
  padding: 3rem 2rem;
}
.stats-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat-item h3 {
  font-size: 2.4rem;
  color: var(--color-gold);
  margin-bottom: 0.3rem;
}
.stat-item p {
  color: rgba(255,255,255,0.65);
  font-size: 0.88rem;
  letter-spacing: 0.03em;
}

/* ---------- Section ---------- */
.section {
  padding: 6rem 2rem;
}
.section-alt { background: var(--color-off-white); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }

/* ---------- Product Categories ---------- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.category-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s, box-shadow 0.35s;
  border: 1px solid var(--color-gray-200);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.category-card-img {
  height: 240px;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.category-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.category-card:hover .category-card-img img { transform: scale(1.05); }

.category-card-img .placeholder-icon {
  font-size: 3.5rem;
  color: var(--color-gray-400);
}
.category-card-body { padding: 1.5rem; }
.category-card-body h3 { margin-bottom: 0.5rem; }
.category-card-body p { color: var(--color-gray-400); font-size: 0.92rem; margin-bottom: 1rem; line-height: 1.6; }
.category-card-body .btn-link {
  color: var(--color-gold);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.category-card-body .btn-link:hover { color: var(--color-gold-dark); }

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.feature-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.2rem;
  background: rgba(201,169,110,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.feature-card h4 { margin-bottom: 0.6rem; }
.feature-card p { color: var(--color-gray-400); font-size: 0.9rem; line-height: 1.6; }

/* ---------- Why Choose Us ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.why-image {
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 1.1rem;
}
.why-content h2 { margin-bottom: 1.5rem; }
.why-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-gray-200);
}
.why-list li:last-child { border-bottom: none; }
.why-list .check-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: rgba(201,169,110,0.15);
  color: var(--color-gold-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  margin-top: 2px;
}
.why-list h4 { margin-bottom: 0.2rem; }
.why-list p { font-size: 0.88rem; color: var(--color-gray-400); }

/* ---------- Process Steps ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  position: relative;
}
.process-step {
  text-align: center;
  position: relative;
}
.process-number {
  width: 56px;
  height: 56px;
  background: var(--color-navy);
  color: var(--color-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}
.process-step h4 { margin-bottom: 0.4rem; }
.process-step p { font-size: 0.88rem; color: var(--color-gray-400); }

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-navy) 0%, #162040 100%);
  text-align: center;
  padding: 5rem 2rem;
}
.cta-section h2 { color: var(--color-white); margin-bottom: 1rem; }
.cta-section p {
  color: rgba(255,255,255,0.7);
  max-width: 500px;
  margin: 0 auto 2rem;
  font-size: 1.02rem;
}

/* ---------- Forms ---------- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-group { margin-bottom: 1rem; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.93rem;
  color: var(--color-gray-800);
  background: var(--color-white);
  transition: border-color 0.3s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { display: flex; justify-content: center; margin-top: 1.5rem; }

/* ---------- FAQ Accordion ---------- */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 0.75rem;
  background: var(--color-white);
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.2rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-navy);
  background: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-question .faq-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
  transition: transform 0.3s;
  color: var(--color-gold);
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.2rem;
}
.faq-answer p {
  font-size: 0.92rem;
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* ---------- Contact Info ---------- */
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.contact-info-card {
  padding: 1.8rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  text-align: center;
}
.contact-info-card .info-icon {
  font-size: 1.5rem;
  margin-bottom: 0.6rem;
}
.contact-info-card h4 { margin-bottom: 0.3rem; }
.contact-info-card p { color: var(--color-gray-400); font-size: 0.9rem; }

/* ---------- Product Grid (Products Page) ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}
.filter-bar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 3rem;
}
.filter-btn {
  padding: 0.55rem 1.5rem;
  border: 1.5px solid var(--color-gray-200);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-600);
  background: var(--color-white);
  transition: all 0.3s;
}
.filter-btn.active,
.filter-btn:hover {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-white);
}
.filter-btn.active { font-weight: 600; }

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-card-img {
  height: 260px;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 0.25rem 0.85rem;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-white);
}
.badge-hot { background: #c0392b; }
.badge-premium { background: var(--color-gold); color: var(--color-navy); }
.badge-custom { background: var(--color-navy); }

.product-card-body { padding: 1.5rem; }
.product-card-body .product-category {
  font-size: 0.75rem;
  color: var(--color-gold-dark);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.product-card-body h3 { margin-bottom: 0.4rem; }
.product-card-body p {
  font-size: 0.88rem;
  color: var(--color-gray-400);
  margin-bottom: 1.2rem;
  line-height: 1.5;
}
.product-card-body .btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius);
  transition: background 0.3s;
}
.product-card-body .btn-sm:hover { background: var(--color-gold); color: var(--color-navy); }

/* ---------- About Page ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 5rem;
}
.about-image {
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 1.1rem;
}
.about-values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.value-card {
  padding: 1.5rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
}
.value-card .value-icon {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}
.value-card h4 { margin-bottom: 0.3rem; }
.value-card p { font-size: 0.85rem; color: var(--color-gray-400); line-height: 1.5; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.65);
  padding: 4rem 2rem 2rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}
.footer-brand h3 {
  color: var(--color-white);
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
}
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.5);
}
.footer-col h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  margin-bottom: 1.2rem;
  font-family: var(--font-body);
  letter-spacing: 0.04em;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  padding: 0.3rem 0;
  transition: color 0.25s;
}
.footer-col a:hover { color: var(--color-gold); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.35s;
  z-index: 900;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-gold); color: var(--color-navy); }

/* ---------- Page Banner ---------- */
.page-banner {
  min-height: 40vh;
  background: linear-gradient(135deg, var(--color-navy) 0%, #162040 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 3rem;
}
.page-banner h1 { color: var(--color-white); }
.page-banner p { color: rgba(255,255,255,0.65); margin-top: 0.8rem; font-size: 1.05rem; }

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- 404 ---------- */
.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  background: var(--color-off-white);
}
.error-page h1 {
  font-size: 6rem;
  color: var(--color-gold);
  margin-bottom: 0.5rem;
}
.error-page h2 { margin-bottom: 1rem; }
.error-page p { color: var(--color-gray-400); margin-bottom: 2rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .why-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-intro { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-navy);
    padding: 1.5rem 2rem 2rem;
    gap: 1.2rem;
    box-shadow: var(--shadow-lg);
  }
  .hamburger { display: flex; }

  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 0.95rem; }

  .section { padding: 4rem 1.5rem; }
  .categories-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .about-values { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-inner { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .process-steps { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .product-gallery { grid-template-columns: repeat(2,1fr) !important; }
  .logo-img { height: 36px; }
}