/* ==============================
   Disong Machinery — Global Styles
   ============================== */

:root {
  --primary: #1a3c5e;
  --primary-light: #2a5a8a;
  --accent: #e67e22;
  --accent-hover: #d35400;
  --bg: #ffffff;
  --bg-gray: #f5f7fa;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #e0e4e8;
  --radius: 10px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary);
}

.logo-icon { font-size: 1.7rem; }

.nav-links { display: flex; gap: 32px; }

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* Mobile toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* Hero */
.hero {
  padding: 160px 0 80px;
  text-align: center;
  background: linear-gradient(135deg, #1a3c5e 0%, #2a5a8a 50%, #1a3c5e 100%);
  color: #fff;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero .highlight {
  color: var(--accent);
}

.hero p {
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto 36px;
  opacity: 0.9;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.25s;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}

.btn-full { width: 100%; justify-content: center; }

/* Stats */
.stats {
  padding: 60px 0;
  background: var(--bg-gray);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  text-align: center;
  padding: 24px 12px;
}

.stat-number {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-gray {
  background: var(--bg-gray);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 48px;
  font-size: 1.05rem;
}

.text-center { text-align: center; }

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--primary);
}

.card p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* Product cards */
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: relative;
  transition: box-shadow 0.25s;
}

.product-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.07); }

.product-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

.product-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.3px;
}

/* Page hero */
.page-hero {
  padding: 130px 0 50px;
  background: linear-gradient(135deg, #1a3c5e, #2a5a8a);
  color: #fff;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.page-hero p {
  font-size: 1.05rem;
  opacity: 0.85;
}

/* About page */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text h2 {
  color: var(--primary);
  font-size: 1.5rem;
  margin-top: 32px;
  margin-bottom: 12px;
}

.about-text h2:first-child { margin-top: 0; }

.about-text p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-text ul {
  list-style: none;
  padding: 0;
}

.about-text ul li {
  padding: 10px 0 10px 28px;
  position: relative;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
}

.about-text ul li:last-child { border: none; }

.about-text ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Contact grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2 {
  color: var(--primary);
  margin-bottom: 28px;
  font-size: 1.4rem;
}

.contact-item {
  margin-bottom: 24px;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--primary);
  margin-bottom: 4px;
}

.contact-item a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.contact-item a:hover { text-decoration: underline; }

.contact-item p {
  color: var(--text-light);
}

/* Contact form */
.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.contact-form h2 {
  color: var(--primary);
  margin-bottom: 24px;
  font-size: 1.3rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 16px;
  transition: border 0.2s;
  background: var(--bg-gray);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

.form-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 12px;
}

/* Footer */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.85);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer p {
  font-size: 0.9rem;
  line-height: 1.6;
  opacity: 0.8;
}

.footer a {
  display: block;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 8px;
  transition: color 0.2s;
}

.footer a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }

  .mobile-toggle { display: flex; }

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

  .grid-3 { grid-template-columns: 1fr 1fr; }

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

  .contact-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 1.7rem; }
  .hero { padding: 140px 0 60px; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats .container { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}