/*=============================================
   PZSSS 企业官网 - 主样式表
   佛山市客信新材料有限公司
   主色调：深蓝 #0A2463 / 深海蓝 #1B3A7B / 亮蓝 #2563EB
   =============================================*/

/* --- CSS Variables / Design Tokens --- */
:root {
  --blue-900: #0A1F4D;
  --blue-800: #0D2B69;
  --blue-700: #113785;
  --blue-600: #1543A1;
  --blue-500: #1A4FBD;
  --blue-400: #2563EB;
  --blue-300: #3B82F6;
  --blue-200: #60A5FA;
  --blue-100: #93C5FD;
  --blue-50: #DBEAFE;

  --accent-gold: #C8943E;
  --accent-orange: #F59E0B;
  --accent-teal: #0EA5A9;
  --accent-green: #10B981;

  --gray-900: #111827;
  --gray-800: #1F2937;
  --gray-700: #374151;
  --gray-600: #4B5563;
  --gray-500: #6B7280;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;

  --white: #FFFFFF;
  --black: #000000;

  --font-heading: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-en: 'Segoe UI', 'Inter', -apple-system, sans-serif;
  --font-num: 'SF Mono', 'Consolas', monospace;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1280px;
  --header-height: 80px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul { list-style: none; }

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

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

/* --- Top Bar --- */
.top-bar {
  background: var(--blue-900);
  color: rgba(255,255,255,0.85);
  font-size: 0.8rem;
  padding: 8px 0;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.top-bar-left { display: flex; gap: 20px; flex-wrap: wrap; }
.top-bar-left span { display: flex; align-items: center; gap: 6px; }
.top-bar-right { display: flex; gap: 8px; align-items: center; }
.lang-switch {
  display: flex; gap: 4px;
}
.lang-switch button {
  background: none; border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8); padding: 3px 10px; border-radius: var(--radius-sm);
  font-size: 0.75rem; cursor: pointer; transition: var(--transition);
}
.lang-switch button:hover, .lang-switch button.active {
  background: var(--blue-400); border-color: var(--blue-400); color: #fff;
}

/* --- Header / Navigation --- */
.header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--white); box-shadow: var(--shadow-md); height: var(--header-height);
}
.header .container {
  display: flex; justify-content: space-between; align-items: center; height: 100%;
}
.logo {
  display: flex; align-items: center; gap: 12px;
}
.logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 900; font-size: 1.3rem; font-family: var(--font-en);
  letter-spacing: -1px;
}
.logo-text h1 {
  font-size: 1.25rem; font-weight: 700; color: var(--blue-900); line-height: 1.2;
  font-family: var(--font-en); letter-spacing: 1px;
}
.logo-text span {
  font-size: 0.7rem; color: var(--gray-500); letter-spacing: 2px; text-transform: uppercase;
}

.main-nav { display: flex; gap: 0; }
.main-nav > li { position: relative; }
.main-nav > li > a {
  display: flex; align-items: center; gap: 4px;
  padding: 0 18px; height: var(--header-height);
  font-size: 0.95rem; font-weight: 500; color: var(--gray-700);
  border-bottom: 3px solid transparent; transition: var(--transition);
}
.main-nav > li > a:hover,
.main-nav > li.active > a {
  color: var(--blue-500); border-bottom-color: var(--blue-500);
}
.main-nav > li > a .arrow {
  font-size: 0.6rem; margin-left: 2px; transition: var(--transition);
}
.main-nav > li:hover > a .arrow {
  transform: rotate(180deg);
}

/* Dropdown */
.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 200px;
  background: var(--white); box-shadow: var(--shadow-xl);
  border-radius: var(--radius-md); padding: 8px 0;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: var(--transition); z-index: 999;
}
.main-nav > li:hover .dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.dropdown li a {
  display: block; padding: 10px 20px; font-size: 0.9rem;
  color: var(--gray-600); transition: var(--transition);
}
.dropdown li a:hover {
  background: var(--blue-50); color: var(--blue-600); padding-left: 24px;
}
.dropdown li a.dropdown-title {
  font-weight: 700; color: var(--blue-900); font-size: 0.85rem;
  text-transform: uppercase; letter-spacing: 1px; cursor: default;
}
.dropdown li a.dropdown-title:hover {
  background: none; padding-left: 20px;
}

.header-actions { display: flex; gap: 12px; align-items: center; }
.btn-search {
  width: 40px; height: 40px; border: none; background: var(--gray-100);
  border-radius: 50%; cursor: pointer; display: flex; align-items: center;
  justify-content: center; font-size: 1.1rem; transition: var(--transition);
}
.btn-search:hover { background: var(--blue-100); color: var(--blue-600); }
.btn-cta {
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  color: #fff; border: none; border-radius: var(--radius-full);
  font-weight: 600; font-size: 0.9rem; cursor: pointer;
  transition: var(--transition); white-space: nowrap;
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-cta-outline {
  padding: 10px 24px;
  background: transparent; color: var(--blue-500);
  border: 2px solid var(--blue-500); border-radius: var(--radius-full);
  font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: var(--transition);
}
.btn-cta-outline:hover { background: var(--blue-500); color: #fff; }

.mobile-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.mobile-toggle span {
  width: 26px; height: 2px; background: var(--gray-700);
  border-radius: 2px; transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  position: relative; min-height: 85vh;
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 40%, var(--blue-500) 100%);
  display: flex; align-items: center; overflow: hidden;
}
.hero::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='0.03'%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");
}
.hero-shapes { position: absolute; inset: 0; overflow: hidden; }
.shape {
  position: absolute; border-radius: 50%; opacity: 0.08;
  background: var(--blue-200);
}
.shape-1 { width: 400px; height: 400px; top: -100px; right: -50px; }
.shape-2 { width: 200px; height: 200px; bottom: 50px; left: 10%; }
.shape-3 { width: 300px; height: 300px; top: 30%; left: 50%; }
.shape-4 { width: 150px; height: 150px; top: 20%; right: 30%; opacity: 0.05; }

.hero-content { position: relative; z-index: 2; }
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 8px 20px; border-radius: var(--radius-full);
  color: rgba(255,255,255,0.9); font-size: 0.85rem;
  margin-bottom: 24px; animation: fadeInUp 0.6s ease;
}
.hero-badge .dot {
  width: 8px; height: 8px; background: var(--accent-green); border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero-title {
  font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2;
  margin-bottom: 20px; font-family: var(--font-heading);
  animation: fadeInUp 0.6s ease 0.1s both;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem; color: rgba(255,255,255,0.8); line-height: 1.8;
  margin-bottom: 36px; max-width: 540px;
  animation: fadeInUp 0.6s ease 0.2s both;
}
.hero-btns {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}
.btn-hero-primary {
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  color: #fff; border: none; border-radius: var(--radius-full);
  font-weight: 700; font-size: 1rem; cursor: pointer;
  transition: var(--transition); display: inline-flex; align-items: center; gap: 8px;
}
.btn-hero-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(200,148,62,0.4); }
.btn-hero-secondary {
  padding: 14px 36px;
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius-full);
  font-weight: 600; font-size: 1rem; cursor: pointer;
  transition: var(--transition);
}
.btn-hero-secondary:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

.hero-stats {
  display: flex; gap: 40px; margin-top: 48px;
  animation: fadeInUp 0.6s ease 0.4s both;
}
.hero-stat h3 {
  font-size: 2rem; font-weight: 800; color: #fff; font-family: var(--font-en);
}
.hero-stat p {
  font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px;
}

.hero-visual {
  position: relative; animation: fadeInRight 0.8s ease 0.3s both;
}
.hero-card {
  background: rgba(255,255,255,0.08); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-xl);
  padding: 40px;
}
.hero-card h3 {
  font-size: 1.3rem; color: #fff; margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.hero-card h3 .icon { font-size: 1.5rem; }
.product-mini-list { display: flex; flex-direction: column; gap: 12px; }
.product-mini-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.9); transition: var(--transition);
}
.product-mini-item:hover {
  background: rgba(255,255,255,0.12);
  transform: translateX(5px);
}
.product-mini-item .num {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--blue-400), var(--blue-300));
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 0.8rem; font-weight: 700;
  flex-shrink: 0;
}

/* --- Section Common --- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center; margin-bottom: 60px;
}
.section-tag {
  display: inline-block; padding: 6px 20px;
  background: var(--blue-50); color: var(--blue-600);
  border-radius: var(--radius-full); font-size: 0.85rem;
  font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: 2.5rem; font-weight: 800; color: var(--gray-900);
  font-family: var(--font-heading); margin-bottom: 16px; line-height: 1.3;
}
.section-desc {
  font-size: 1.05rem; color: var(--gray-500); max-width: 650px;
  margin: 0 auto; line-height: 1.8;
}
.section-bg-gray { background: var(--gray-50); }
.section-bg-dark {
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
  color: #fff;
}
.section-bg-dark .section-title { color: #fff; }
.section-bg-dark .section-desc { color: rgba(255,255,255,0.7); }
.section-bg-dark .section-tag {
  background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.9);
}

/* --- Product Cards on Home --- */
.product-cards {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px;
}
.product-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 36px 24px; text-align: center;
  box-shadow: var(--shadow-md); transition: var(--transition);
  border: 1px solid var(--gray-100);
  cursor: pointer; position: relative; overflow: hidden;
}
.product-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: linear-gradient(90deg, var(--blue-500), var(--blue-300));
  transform: scaleX(0); transition: var(--transition);
}
.product-card:hover::before { transform: scaleX(1); }
.product-card:hover {
  transform: translateY(-8px); box-shadow: var(--shadow-xl);
}
.product-card-icon {
  width: 70px; height: 70px; margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  border-radius: var(--radius-lg); display: flex; align-items: center;
  justify-content: center;
  font-size: 2rem; transition: var(--transition);
}
.product-card:hover .product-card-icon {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-400));
  color: #fff;
}
.product-card h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px;
}
.product-card p {
  font-size: 0.85rem; color: var(--gray-500); line-height: 1.6;
}
.product-card-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--blue-500); font-weight: 600; font-size: 0.85rem;
  margin-top: 12px; transition: var(--transition);
}
.product-card-link:hover { gap: 8px; }

/* --- Features / Why Us --- */
.features-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
}
.feature-item {
  text-align: center; padding: 32px 20px;
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); border: 1px solid var(--gray-100);
  transition: var(--transition);
}
.feature-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 1.8rem;
}
.feature-item h4 { font-size: 1.1rem; color: var(--gray-900); margin-bottom: 8px; }
.feature-item p { font-size: 0.9rem; color: var(--gray-500); line-height: 1.6; }

/* --- Statistics --- */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
}
.stat-item {
  text-align: center; padding: 40px 20px;
  background: rgba(255,255,255,0.06); border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}
.stat-item .number {
  font-size: 3rem; font-weight: 800; font-family: var(--font-en);
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 8px;
}
.stat-item .label {
  font-size: 0.95rem; color: rgba(255,255,255,0.7);
}

/* --- Solutions Cards --- */
.solutions-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.solution-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-md);
  transition: var(--transition); border: 1px solid var(--gray-100);
}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.solution-card-img {
  height: 200px; background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; color: rgba(255,255,255,0.3);
}
.solution-card-body { padding: 24px; }
.solution-card-body h3 { font-size: 1.2rem; color: var(--gray-900); margin-bottom: 10px; }
.solution-card-body p { font-size: 0.9rem; color: var(--gray-500); line-height: 1.7; }
.solution-card-body .tag-list {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px;
}
.tag {
  padding: 4px 12px; background: var(--blue-50); color: var(--blue-600);
  border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 500;
}

/* --- News Cards --- */
.news-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.news-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: var(--transition); border: 1px solid var(--gray-100);
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.news-card-img {
  height: 200px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--gray-200), var(--gray-300));
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--gray-400);
}
.news-card-badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 14px; background: var(--blue-500); color: #fff;
  border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600;
}
.news-card-body { padding: 20px; }
.news-card-body .date {
  font-size: 0.8rem; color: var(--gray-400); margin-bottom: 8px;
}
.news-card-body h4 {
  font-size: 1.05rem; color: var(--gray-900); margin-bottom: 8px;
  line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card-body p {
  font-size: 0.85rem; color: var(--gray-500); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  border-radius: var(--radius-xl); padding: 60px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 40px;
}
.cta-banner h2 {
  font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 10px;
}
.cta-banner p {
  color: rgba(255,255,255,0.8); font-size: 1.05rem; line-height: 1.7;
}
.cta-banner .btn-cta-large {
  padding: 16px 40px; background: #fff; color: var(--blue-600);
  border: none; border-radius: var(--radius-full); font-weight: 700;
  font-size: 1.1rem; cursor: pointer; transition: var(--transition);
  white-space: nowrap;
}
.cta-banner .btn-cta-large:hover {
  transform: translateY(-3px); box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* --- Contact Section --- */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px;
}
.contact-info { }
.contact-info h3 { font-size: 1.5rem; margin-bottom: 24px; color: var(--gray-900); }
.contact-item {
  display: flex; gap: 14px; margin-bottom: 20px;
}
.contact-item .icon-box {
  width: 44px; height: 44px; flex-shrink: 0;
  background: var(--blue-50); color: var(--blue-600);
  border-radius: var(--radius-md); display: flex; align-items: center;
  justify-content: center; font-size: 1.2rem;
}
.contact-item .info h5 { font-size: 0.9rem; color: var(--gray-900); margin-bottom: 2px; }
.contact-item .info p { font-size: 0.85rem; color: var(--gray-500); }
.contact-form-wrap {
  background: var(--gray-50); border-radius: var(--radius-lg); padding: 40px;
}
.contact-form-wrap h3 { font-size: 1.3rem; margin-bottom: 20px; color: var(--gray-900); }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600;
  color: var(--gray-700); margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 12px 16px; border: 2px solid var(--gray-200);
  border-radius: var(--radius-md); font-size: 0.95rem; font-family: var(--font-body);
  transition: var(--transition); background: #fff; outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue-400); box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.btn-submit {
  width: 100%; padding: 14px; background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  color: #fff; border: none; border-radius: var(--radius-md); font-size: 1rem;
  font-weight: 700; cursor: pointer; transition: var(--transition);
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* --- Footer --- */
.footer {
  background: var(--blue-900); color: rgba(255,255,255,0.7);
  padding: 80px 0 0; position: relative;
}
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-orange), var(--blue-400), var(--blue-300));
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
}
.footer-col h4 {
  font-size: 1.05rem; color: #fff; margin-bottom: 20px; font-weight: 700;
}
.footer-col p { font-size: 0.9rem; line-height: 1.8; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--blue-300); padding-left: 5px; }
.footer-qr { display: flex; gap: 20px; margin-top: 16px; }
.footer-qr-item {
  width: 80px; height: 80px; background: rgba(255,255,255,0.1);
  border-radius: var(--radius-md); display: flex; align-items: center;
  justify-content: center; font-size: 1.5rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 50px; padding: 24px 0;
  text-align: center; font-size: 0.8rem;
}

/* --- Page Header Banner (inner pages) --- */
.page-banner {
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
  padding: 80px 0 60px; text-align: center; position: relative;
  overflow: hidden;
}
.page-banner::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'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='3'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-banner h1 { font-size: 2.8rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.page-banner .breadcrumb {
  color: rgba(255,255,255,0.6); font-size: 0.9rem;
}
.page-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
.page-banner .breadcrumb a:hover { color: #fff; }

/* --- About Page --- */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-img {
  border-radius: var(--radius-xl); overflow: hidden;
  background: linear-gradient(135deg, var(--blue-200), var(--blue-100));
  height: 450px; display: flex; align-items: center; justify-content: center;
  font-size: 6rem; color: rgba(255,255,255,0.5); position: relative;
}
.about-img::after {
  content: ''; position: absolute; bottom: -20px; right: -20px;
  width: 120px; height: 120px; background: var(--blue-500);
  border-radius: var(--radius-lg); z-index: -1;
}
.about-content h3 { font-size: 1.5rem; margin-bottom: 20px; color: var(--gray-900); }
.about-content p { margin-bottom: 16px; color: var(--gray-600); line-height: 1.9; }

.cert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.cert-item {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 30px 20px; text-align: center;
  box-shadow: var(--shadow-sm); border: 1px solid var(--gray-100);
  transition: var(--transition);
}
.cert-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.cert-item .cert-icon {
  font-size: 2.5rem; margin-bottom: 12px;
}
.cert-item h4 { font-size: 0.95rem; color: var(--gray-900); }

/* --- Product Detail Page --- */
.prod-hero {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  padding: 60px 0;
}
.prod-hero-img {
  height: 400px; border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; position: relative; overflow: hidden;
}
.prod-hero-content h2 { font-size: 2rem; font-weight: 800; color: var(--gray-900); margin-bottom: 16px; }
.prod-hero-content .prod-desc { font-size: 1.05rem; color: var(--gray-600); line-height: 1.8; margin-bottom: 20px; }
.prod-features-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 24px; }
.prod-features-list li {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.95rem; color: var(--gray-700);
}
.prod-features-list li::before {
  content: '✓'; color: var(--accent-green); font-weight: 700;
}

.prod-spec-table {
  width: 100%; border-collapse: collapse; margin-top: 20px;
}
.prod-spec-table th, .prod-spec-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--gray-200);
  font-size: 0.9rem;
}
.prod-spec-table th {
  background: var(--gray-50); color: var(--gray-700); font-weight: 600;
  width: 30%; white-space: nowrap;
}
.prod-spec-table td { color: var(--gray-600); }

.prod-app-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 30px;
}
.prod-app-item {
  text-align: center; padding: 30px 16px;
  background: var(--gray-50); border-radius: var(--radius-lg);
  transition: var(--transition);
}
.prod-app-item:hover { background: var(--blue-50); }
.prod-app-item .icon { font-size: 2rem; margin-bottom: 10px; }
.prod-app-item h5 { font-size: 0.95rem; color: var(--gray-900); }

/* --- FAQ --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  margin-bottom: 12px; border: 1px solid var(--gray-200);
  border-radius: var(--radius-md); overflow: hidden;
}
.faq-q {
  padding: 18px 24px; background: var(--gray-50);
  font-weight: 600; color: var(--gray-900); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  transition: var(--transition);
}
.faq-q:hover { background: var(--blue-50); }
.faq-q .icon { transition: var(--transition); }
.faq-item.active .faq-q { background: var(--blue-50); color: var(--blue-600); }
.faq-item.active .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  padding: 0 24px; max-height: 0; overflow: hidden;
  transition: var(--transition); color: var(--gray-600); line-height: 1.8;
}
.faq-item.active .faq-a { padding: 18px 24px; max-height: 300px; }

/* --- Pagination --- */
.pagination {
  display: flex; justify-content: center; gap: 8px; margin-top: 40px;
}
.pagination a, .pagination span {
  width: 40px; height: 40px; display: flex; align-items: center;
  justify-content: center; border-radius: var(--radius-md);
  font-size: 0.9rem; transition: var(--transition);
  border: 1px solid var(--gray-200);
}
.pagination a:hover { background: var(--blue-50); border-color: var(--blue-300); }
.pagination .current {
  background: var(--blue-500); color: #fff; border-color: var(--blue-500);
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .product-cards { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-title { font-size: 2.4rem; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .prod-hero { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .top-bar { display: none; }
  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-actions .btn-cta { display: none; }
  .hero { min-height: 70vh; }
  .hero-title { font-size: 2rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .product-cards { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .cta-banner { flex-direction: column; text-align: center; padding: 40px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-app-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
  .page-banner h1 { font-size: 2rem; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .product-cards { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .hero-stats { justify-content: center; }
  .solutions-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0;
  background: var(--white); z-index: 999;
  transform: translateX(100%); transition: var(--transition);
  overflow-y: auto; padding: 20px;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a {
  display: block; padding: 14px 0; border-bottom: 1px solid var(--gray-100);
  font-size: 1.05rem; font-weight: 500; color: var(--gray-700);
}
.mobile-menu .submenu { padding-left: 16px; }
.mobile-menu .submenu a { font-size: 0.95rem; color: var(--gray-500); }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: var(--transition-slow);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* --- Back to Top --- */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px; z-index: 99;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--blue-500); color: #fff; border: none;
  cursor: pointer; display: flex; align-items: center;
  justify-content: center; font-size: 1.2rem;
  box-shadow: var(--shadow-lg); transition: var(--transition);
  opacity: 0; visibility: hidden;
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--blue-700); transform: translateY(-3px); }