/* ============================================
  拜斯特节能材料 - 工业科技风 CSS
   ============================================ */

/* CSS Variables */
:root {
  --primary:       #1A1A2E;
  --secondary:     #16213E;
  --accent:        #E8963A;
  --accent-light:  #F5B041;
  --accent-dark:   #C07820;
  --text-light:    #FFFFFF;
  --text-muted:    #8D99AE;
  --surface:       #232342;
  --surface-light: #2D2D4A;
  --border:        rgba(232, 150, 58, 0.2);
  --border-hover:  rgba(232, 150, 58, 0.6);
  --shadow:        0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover:  0 8px 40px rgba(0,0,0,0.5);
  --radius:        8px;
  --radius-lg:     16px;
  --transition:    all 0.3s ease;
  --max-width:     1440px;
  --header-h:      72px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Inter", sans-serif;
  background: var(--primary);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul { list-style: none; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-light);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 64px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Header / Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 1000;
  transition: var(--transition);
  background: transparent;
}

.header.scrolled {
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 30px rgba(0,0,0,0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
}

.nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav a {
  font-size: 15px;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--text-light);
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(232, 150, 58, 0.15);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.header-phone:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-light);
  transition: var(--transition);
}

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

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

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

.mobile-nav a {
  font-size: 24px;
  color: var(--text-light);
  font-weight: 600;
}

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(232, 150, 58, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 176, 65, 0.06) 0%, transparent 50%);
}

.hero-geo {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-geo-line {
  position: absolute;
  background: linear-gradient(90deg, transparent, rgba(232,150,58,0.1), transparent);
  height: 1px;
}

.hero-geo-line:nth-child(1) {
  width: 60%;
  top: 30%;
  left: -10%;
  transform: rotate(-15deg);
}

.hero-geo-line:nth-child(2) {
  width: 40%;
  top: 65%;
  right: -5%;
  transform: rotate(10deg);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(232,150,58,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232,150,58,0.03) 1px, transparent 1px);
  background-size: 80px 80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232, 150, 58, 0.12);
  border: 1px solid var(--border);
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 32px;
  animation: fadeIn 1s ease 0.2s both;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero h1 .accent {
  color: var(--accent);
  position: relative;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.8;
  animation: fadeInUp 1s ease 0.6s both;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.8s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232, 150, 58, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(232, 150, 58, 0.5);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-hover);
  color: var(--text-light);
}

.btn-outline:hover {
  background: rgba(232, 150, 58, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 12px;
  animation: fadeIn 1s ease 1.2s both;
}

.hero-scroll-icon {
  width: 24px;
  height: 40px;
  border: 2px solid var(--border-hover);
  border-radius: 12px;
  position: relative;
}

.hero-scroll-icon::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollDown 2s ease infinite;
}

@keyframes scrollDown {
  0% { top: 8px; opacity: 1; }
  100% { top: 24px; opacity: 0; }
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
  padding: 80px 0;
  background: var(--secondary);
  position: relative;
}

.stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
  position: relative;
}

.stat-card::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border);
}

.stat-card:last-child::after {
  display: none;
}

.stat-value {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  color: var(--accent);
  font-family: "Inter", sans-serif;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.stat-accent {
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin: 16px auto 0;
  border-radius: 2px;
}

/* ============================================
   Products Section
   ============================================ */
.products {
  padding: 120px 0;
  background: var(--primary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.product-card:hover::before {
  opacity: 1;
}

.product-icon {
  width: 80px;
  height: 80px;
  background: rgba(232, 150, 58, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 32px;
  color: var(--accent);
  transition: var(--transition);
}

.product-card:hover .product-icon {
  background: rgba(232, 150, 58, 0.2);
  transform: scale(1.1);
}

.product-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.product-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================
   About Section
   ============================================ */
.about {
  padding: 120px 0;
  background: var(--secondary);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(232,150,58,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text .section-label {
  text-align: left;
}

.about-text h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  margin-bottom: 24px;
}

.about-text p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-light);
}

.about-feature-icon {
  width: 24px;
  height: 24px;
  background: rgba(232, 150, 58, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 12px;
  flex-shrink: 0;
}

.about-image {
  position: relative;
}

.about-img-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
}

.about-img-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--surface-light) 0%, var(--surface) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 48px;
  border: 2px dashed var(--border);
}

.about-img-decoration {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: var(--radius-lg);
  opacity: 0.2;
  z-index: -1;
}

/* ============================================
   News Section
   ============================================ */
.news {
  padding: 120px 0;
  background: var(--primary);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.news-img {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--surface-light), var(--surface));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.news-img-inner {
  width: 100%;
  height: 100%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-muted);
  transition: transform 0.5s ease;
}

.news-card:hover .news-img-inner {
  transform: scale(1.05);
}

.news-body {
  padding: 24px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.news-tag {
  background: rgba(232, 150, 58, 0.12);
  color: var(--accent);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 12px;
  font-weight: 600;
}

.news-date {
  font-size: 12px;
  color: var(--text-muted);
}

.news-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.news-card:hover .news-title {
  color: var(--accent-light);
}

.news-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
}

.news-link:hover {
  color: var(--accent-light);
  gap: 10px;
}

/* ============================================
   Cases Section
   ============================================ */
.cases {
  padding: 120px 0;
  background: var(--secondary);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.case-img {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--surface-light), var(--surface));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-muted);
}

.case-body {
  padding: 24px;
}

.case-category {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.case-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.case-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 50%, var(--accent-light) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta h2 {
  font-size: clamp(28px, 4vw, 48px);
  margin-bottom: 16px;
  color: #fff;
}

.cta p {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 40px;
}

.cta-phone {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  color: var(--accent-dark);
  padding: 18px 40px;
  border-radius: 50px;
  font-size: 24px;
  font-weight: 900;
  font-family: "Inter", sans-serif;
  transition: var(--transition);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.cta-phone:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--primary);
  padding: 80px 0 0;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 64px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-light);
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-contact-icon {
  color: var(--accent);
  font-size: 16px;
  margin-top: 2px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

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

/* ============================================
   Page Header (inner pages)
   ============================================ */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(232,150,58,0.06) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(245,176,65,0.04) 0%, transparent 50%);
}

.page-header h1 {
  font-size: clamp(32px, 5vw, 52px);
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease;
}

.page-header p {
  font-size: 18px;
  color: var(--text-muted);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
  animation: fadeIn 0.8s ease;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb span {
  color: var(--accent);
}

/* ============================================
   About Page
   ============================================ */
.about-page-content {
  padding: 80px 0;
  background: var(--primary);
}

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

.about-section:nth-child(even) {
  background: var(--secondary);
}

.about-section h2 {
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 24px;
}

.about-section p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 800px;
}

.honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.honor-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.honor-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.honor-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.honor-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.honor-desc {
  font-size: 14px;
  color: var(--text-muted);
}

/* ============================================
   Products Page
   ============================================ */
.products-page-content {
  padding: 80px 0;
  background: var(--primary);
}

.products-filter {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  justify-content: center;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

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

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

.product-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.product-item-img {
  width: 100%;
  aspect-ratio: 1;
  background: var(--surface-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.product-item-body {
  padding: 20px;
}

.product-item-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.product-item-spec {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.product-item-feature {
  font-size: 13px;
  color: var(--accent);
}

/* ============================================
   News Page
   ============================================ */
.news-page-content {
  padding: 80px 0;
  background: var(--primary);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ============================================
   Cases Page
   ============================================ */
.cases-page-content {
  padding: 80px 0;
  background: var(--primary);
}

.cases-grid-2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ============================================
   Contact Page
   ============================================ */
.contact-page-content {
  padding: 80px 0;
  background: var(--primary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.contact-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.contact-info h3 {
  font-size: 24px;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background: rgba(232,150,58,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 20px;
  flex-shrink: 0;
}

.contact-item-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 16px;
  font-weight: 600;
}

.contact-item-value a:hover {
  color: var(--accent);
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.contact-form h3 {
  font-size: 24px;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-label .required {
  color: var(--accent);
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 15px;
  color: var(--text-light);
  transition: var(--transition);
  font-family: inherit;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(232,150,58,0.05);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 16px;
}

.map-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 16px;
  margin-top: 24px;
}

/* ============================================
   Partners Section
   ============================================ */
.partners {
  padding: 80px 0;
  background: var(--primary);
  overflow: hidden;
}

.partners-track {
  display: flex;
  gap: 48px;
  animation: scroll 30s linear infinite;
}

.partner-item {
  flex-shrink: 0;
  width: 180px;
  height: 80px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partners:hover .partners-track {
  animation-play-state: paused;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .products-list { grid-template-columns: repeat(3, 1fr); }
  .about-grid { gap: 48px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .news-grid, .news-list, .cases-grid, .cases-grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --header-h: 64px;
  }

  .nav, .header-phone { display: none; }
  .menu-toggle { display: flex; }

  .hero h1 { font-size: clamp(28px, 8vw, 48px); }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-card::after { display: none; }

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

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-features { grid-template-columns: 1fr; }

  .news-grid, .news-list, .cases-grid, .cases-grid-2 { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .form-row { grid-template-columns: 1fr; }

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

  .hero-btns { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 300px; justify-content: center; }
}

@media (max-width: 480px) {
  .products-list { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}