:root {
  --primary: #1a56db;
  --primary-dark: #1240a8;
  --primary-light: #3b82f6;
  --primary-bg: #eef2ff;
  --secondary: #0ea5e9;
  --accent: #06b6d4;
  --text-dark: #0f172a;
  --text-gray: #475569;
  --text-light: #94a3b8;
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-gray: #f1f5f9;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --nav-height: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background: var(--bg-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; 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; }

.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: #ffffff;
  z-index: 1000; transition: var(--transition);
  border-bottom: none;
}

.navbar.scrolled {
  background: #ffffff;
  box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}

.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo .logo-img { height: 64px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-gray); position: relative; padding: 4px 0; letter-spacing: 0.01em; }
.nav-links a:hover { color: var(--primary); }
.nav-links a::after { content: ""; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); border-radius: 1px; transition: var(--transition); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--primary); }

.nav-cta {
  background: var(--primary) !important; color: white !important;
  padding: 8px 20px !important; border-radius: 20px;
  font-size: 13px !important; font-weight: 600 !important;
  letter-spacing: 0.02em;
}
.nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,86,219,0.3); }
.nav-cta::after { display: none !important; }

.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.mobile-toggle span { width: 22px; height: 2px; background: var(--text-dark); transition: var(--transition); border-radius: 2px; }
.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding-top: var(--nav-height);
  color: white; overflow: hidden;
}

.hero-slideshow { position: absolute; inset: 0; z-index: 0; }
.hero-slide {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0;
  transition: opacity 1.2s ease-in-out;
  transform: scale(1);
  animation: none;
}
.hero-slide.active {
  opacity: 1;
  animation: kenBurns 8s ease-in-out forwards;
}
@keyframes kenBurns {
  0% { transform: scale(1); }
  100% { transform: scale(1.08); }
}

.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(15,23,42,0.55) 0%,
    rgba(26,86,219,0.35) 50%,
    rgba(14,165,233,0.25) 100%
  );
}

.hero-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 3; width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2); border-radius: 50%;
  cursor: pointer; color: white; font-size: 20px;
  transition: all 0.3s ease;
}
.hero-nav:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-50%) scale(1.08);
}
.hero-nav-prev { left: 32px; }
.hero-nav-next { right: 32px; }

.hero-dots {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 12px; z-index: 3;
}
.hero-dot {
  width: 32px; height: 4px; border-radius: 2px;
  background: rgba(255,255,255,0.35); cursor: pointer; transition: var(--transition);
}
.hero-dot.active { background: white; width: 48px; }

.hero-container { position: relative; z-index: 2; padding: 60px 0; }

.hero-content { max-width: 680px; }

.hero-badge {
  display: inline-block; padding: 6px 16px;
  background: rgba(255,255,255,0.12); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2); border-radius: 20px;
  font-size: 13px; font-weight: 500; letter-spacing: 0.05em;
  margin-bottom: 28px; color: rgba(255,255,255,0.9);
}

.hero-content h1 {
  font-size: 52px; font-weight: 800; line-height: 1.2;
  margin-bottom: 20px; letter-spacing: -0.02em;
}

.hero-content p {
  font-size: 18px; opacity: 0.85; margin-bottom: 36px;
  line-height: 1.8; max-width: 520px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: white; color: var(--primary);
  padding: 14px 32px; border-radius: 28px;
  font-size: 15px; font-weight: 600; letter-spacing: 0.01em;
  transition: var(--transition);
}
.hero-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); }

.hero-btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25); color: white;
  padding: 14px 32px; border-radius: 28px;
  font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.hero-btn-secondary:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

.hero-stats {
  display: flex; gap: 48px; margin-top: 64px;
  padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat { text-align: center; }
.hero-stat-num { font-size: 40px; font-weight: 800; letter-spacing: -0.02em; }
.hero-stat-suffix { font-size: 20px; font-weight: 600; opacity: 0.8; }
.hero-stat-label { display: block; font-size: 13px; opacity: 0.7; margin-top: 4px; letter-spacing: 0.02em; }

/* ===== SECTIONS ===== */
.section { padding: 96px 0; }
.section-gray { background: var(--bg-gray); }
.section-dark { background: #0f172a; color: white; }

.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; padding: 4px 14px;
  background: var(--primary-bg); color: var(--primary);
  border-radius: 12px; font-size: 12px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 16px;
}
.section-tag.light { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.9); }

.section-header h2 {
  font-size: 36px; font-weight: 800; color: var(--text-dark);
  margin-bottom: 12px; letter-spacing: -0.02em;
}
.section-dark .section-header h2 { color: white; }

.section-header p { font-size: 16px; color: var(--text-gray); max-width: 480px; margin: 0 auto; }
.section-dark .section-header p { color: var(--text-light); }

/* ===== PRODUCTS ===== */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.product-card {
  background: var(--bg-white); border-radius: var(--radius-2xl);
  padding: 36px 28px; text-align: center;
  border: 1px solid var(--border); transition: var(--transition);
  position: relative; overflow: hidden;
}

.product-card-glow {
  position: absolute; top: -40px; left: 50%; transform: translateX(-50%);
  width: 120px; height: 120px; border-radius: 50%;
  opacity: 0; transition: opacity 0.4s ease; filter: blur(40px);
}
.product-card[data-color="blue"] .product-card-glow { background: rgba(26,86,219,0.15); }
.product-card[data-color="cyan"] .product-card-glow { background: rgba(14,165,233,0.15); }
.product-card[data-color="purple"] .product-card-glow { background: rgba(124,58,237,0.15); }
.product-card[data-color="green"] .product-card-glow { background: rgba(5,150,105,0.15); }

.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }
.product-card:hover .product-card-glow { opacity: 1; }

.product-icon-wrap {
  width: 72px; height: 72px; margin: 0 auto 20px;
  border-radius: 20px; display: flex; align-items: center; justify-content: center;
  font-size: 32px; position: relative;
}
.product-icon-wrap.blue { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.product-icon-wrap.cyan { background: linear-gradient(135deg, #cffafe, #a5f3fc); color: #0891b2; }
.product-icon-wrap.purple { background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed; }
.product-icon-wrap.green { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }

.product-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.product-card p { font-size: 14px; color: var(--text-gray); margin-bottom: 20px; line-height: 1.7; }

.product-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--primary); font-size: 14px; font-weight: 600;
}
.product-link:hover { gap: 10px; }

/* ===== SOLUTION BANNER ===== */
.solution-banner {
  background: linear-gradient(135deg, #1e3a8a, #1a56db, #0ea5e9);
  border-radius: var(--radius-2xl); padding: 64px;
  display: flex; align-items: center; justify-content: space-between;
  position: relative; overflow: hidden;
}
.solution-banner::before {
  content: ""; position: absolute; right: -80px; top: -80px;
  width: 300px; height: 300px; background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.solution-banner::after {
  content: ""; position: absolute; left: -40px; bottom: -40px;
  width: 160px; height: 160px; background: rgba(255,255,255,0.03);
  border-radius: 50%;
}

.solution-text { position: relative; z-index: 1; }
.solution-text h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.solution-text p { opacity: 0.9; font-size: 16px; max-width: 480px; line-height: 1.7; }

.solution-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: white; color: var(--primary);
  padding: 14px 28px; border-radius: 28px;
  font-weight: 600; white-space: nowrap; z-index: 1;
  font-size: 15px;
}
.solution-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.2); }

/* ===== PARTNERS ===== */
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 12px; }

.partner-item {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px 16px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition); min-height: 80px;
}
.partner-item img { max-width: 100%; max-height: 50px; object-fit: contain; filter: grayscale(0.3); transition: var(--transition); }
.partner-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.partner-item:hover img { filter: grayscale(0); }

.cooperation-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 24px; }

.cooperation-card {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 32px 20px;
  text-align: center; transition: var(--transition);
}
.cooperation-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: var(--primary-light); }

.cooperation-logo-wrap {
  width: 120px; height: 80px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
}
.cooperation-logo-wrap img { max-width: 100%; max-height: 100%; object-fit: contain; }

.cooperation-card h3 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.cooperation-card p { font-size: 13px; color: var(--text-light); line-height: 1.5; }

.cta-block {
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 50%, #3b82f6 100%);
  border-radius: var(--radius-2xl); padding: 56px 48px; color: white;
  position: relative; overflow: hidden;
}
.cta-block::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='0.06'%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-content { position: relative; z-index: 1; }
.cta-content h2 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.cta-content p { font-size: 16px; opacity: 0.9; }
.cta-actions { position: relative; z-index: 1; display: flex; gap: 16px; flex-shrink: 0; }

/* ===== ABOUT ===== */
.about-layout { display: flex; gap: 48px; align-items: center; }
.about-img-wrap { flex-shrink: 0; width: 420px; }
.about-img { width: 100%; border-radius: var(--radius-2xl); box-shadow: var(--shadow-lg); }

.about-text { flex: 1; }
.about-text p { font-size: 16px; color: var(--text-gray); line-height: 2; margin-bottom: 16px; }

.about-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--primary); font-size: 15px; font-weight: 600;
  margin-top: 8px;
}
.about-link:hover { gap: 10px; }

/* ===== APPLY ===== */
.apply-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.apply-card {
  background: var(--bg-white); border-radius: var(--radius-2xl);
  overflow: hidden; border: 1px solid var(--border);
  transition: var(--transition); text-align: center;
}
.apply-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }

.apply-card-img { width: 80px; height: 80px; object-fit: contain; margin: 32px auto 0; display: block; }

.apply-card-body { padding: 20px 28px 28px; }
.apply-card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.apply-card-body p { font-size: 14px; color: var(--text-gray); margin-bottom: 20px; line-height: 1.7; }

.apply-btn {
  display: inline-block; background: var(--primary); color: white;
  padding: 10px 24px; border-radius: 20px;
  font-size: 14px; font-weight: 600;
}
.apply-btn:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,86,219,0.3); }

/* ===== CASES ===== */
.cases-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }

.case-card {
  background: var(--bg-white); border-radius: var(--radius-xl);
  overflow: hidden; border: 1px solid var(--border); transition: var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }

.case-img { width: 100%; height: 140px; object-fit: cover; background: var(--bg-gray); }
.case-card h3 { font-size: 13px; font-weight: 600; color: var(--text-dark); padding: 12px 16px; text-align: center; }

.dark-cases .case-card { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); }
.dark-cases .case-card:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.1); }
.dark-cases .case-card h3 { color: rgba(255,255,255,0.9); }

/* ===== FOOTER ===== */
.footer { background: #0f172a; color: white; padding: 64px 0 32px; }

.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }

.footer-logo { height: 44px; width: auto; margin-bottom: 16px; mix-blend-mode: multiply; }
.footer-brand p { font-size: 14px; color: var(--text-light); line-height: 1.8; }

.footer-col h4 { font-size: 15px; font-weight: 600; margin-bottom: 20px; color: white; }
.footer-col a { display: block; font-size: 14px; color: var(--text-light); margin-bottom: 12px; }
.footer-col a:hover { color: white; }

.footer-contact p { font-size: 14px; color: var(--text-light); margin-bottom: 12px; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; text-align: center; font-size: 13px; color: var(--text-light); }

/* ===== BANNER PAGE (sub pages) ===== */
.banner { padding-top: var(--nav-height); background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 30%, #3b82f6 60%, #0ea5e9 100%); color: white; position: relative; overflow: hidden; }
.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' 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"); }
.banner .container { position: relative; z-index: 1; }
.banner-page { padding: 100px 0 60px; text-align: center; }
.banner-page h1 { font-size: 40px; font-weight: 700; margin-bottom: 16px; }
.banner-page p { font-size: 18px; opacity: 0.9; }

/* ===== ADVANTAGES ===== */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-card { background: var(--bg-white); border-radius: var(--radius-2xl); padding: 36px 24px; text-align: center; border: 1px solid var(--border); transition: var(--transition); }
.advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.advantage-card .adv-icon { width: 64px; height: 64px; margin: 0 auto 16px; background: var(--primary-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--primary); }
.advantage-card .adv-img { width: 48px; height: 48px; margin: 0 auto 12px; display: block; }
.advantage-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.advantage-card p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* ===== FORMS ===== */
.forms-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.form-card { background: var(--bg-white); border-radius: var(--radius-2xl); padding: 40px; border: 1px solid var(--border); transition: var(--transition); }
.form-card:hover { box-shadow: var(--shadow-lg); }
.form-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); }
.form-card .form-desc { font-size: 14px; color: var(--text-gray); margin-bottom: 24px; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 8px; color: var(--text-dark); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; color: var(--text-dark); background: var(--bg-light); transition: var(--transition); outline: none; font-family: inherit; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.1); background: white; }
.form-group textarea { resize: vertical; min-height: 100px; }

.btn-primary { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--primary); color: white; padding: 12px 32px; border-radius: 24px; font-size: 15px; font-weight: 600; border: none; cursor: pointer; transition: var(--transition); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* ===== SCENARIOS ===== */
.scenarios-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scenario-card { background: var(--bg-white); border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.scenario-visual { height: 180px; display: flex; align-items: center; justify-content: center; font-size: 48px; position: relative; overflow: hidden; }
.scenario-visual img { width: 100%; height: 100%; object-fit: contain; }
.scenario-visual.blue { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.scenario-visual.cyan { background: linear-gradient(135deg, #cffafe, #a5f3fc); color: #0891b2; }
.scenario-visual.purple { background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed; }
.scenario-visual.green { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }
.scenario-info { padding: 24px; }
.scenario-info h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.scenario-info p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* ===== NEWS ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--bg-white); border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-thumb { height: 180px; background: linear-gradient(135deg, #dbeafe, #bfdbfe); }
.news-body { padding: 24px; }
.news-date { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.news-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.news-body p { font-size: 14px; color: var(--text-gray); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== CHAT ===== */
.chat-fab { position: fixed; bottom: 32px; right: 32px; width: 56px; height: 56px; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 20px rgba(26,86,219,0.35); z-index: 999; transition: var(--transition); border: none; color: white; font-size: 22px; }
.chat-fab:hover { transform: scale(1.1); box-shadow: 0 6px 25px rgba(26,86,219,0.45); }

.chat-window { position: fixed; bottom: 100px; right: 32px; width: 380px; height: 520px; background: var(--bg-white); border-radius: var(--radius-2xl); box-shadow: var(--shadow-xl); z-index: 998; display: none; flex-direction: column; overflow: hidden; border: 1px solid var(--border); }
.chat-window.open { display: flex; animation: chatSlideUp 0.3s ease; }
@keyframes chatSlideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.chat-header { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; }
.chat-header h4 { font-size: 15px; font-weight: 600; }
.chat-close { background: none; border: none; color: white; font-size: 20px; cursor: pointer; opacity: 0.8; padding: 4px; }
.chat-close:hover { opacity: 1; }

.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.chat-msg { max-width: 80%; padding: 10px 14px; border-radius: var(--radius-lg); font-size: 14px; line-height: 1.5; word-break: break-word; }
.chat-msg.bot { background: var(--bg-gray); color: var(--text-dark); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--primary); color: white; align-self: flex-end; border-bottom-right-radius: 4px; }

.chat-quick-questions { display: flex; gap: 8px; padding: 8px 16px; overflow-x: auto; border-top: 1px solid var(--border); }
.quick-q { flex-shrink: 0; padding: 6px 14px; background: var(--primary-bg); color: var(--primary); border: 1px solid rgba(26,86,219,0.2); border-radius: 16px; font-size: 12px; cursor: pointer; transition: all 0.2s ease; white-space: nowrap; }
.quick-q:hover { background: var(--primary); color: white; border-color: var(--primary); }

.chat-input-area { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; gap: 8px; }
.chat-input-area input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 20px; font-size: 14px; outline: none; transition: var(--transition); }
.chat-input-area input:focus { border-color: var(--primary); }
.chat-send { width: 40px; height: 40px; background: var(--primary); color: white; border: none; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); }
.chat-send:hover { background: var(--primary-dark); }

.chat-msg-time { font-size: 11px; color: var(--text-light); margin-top: 4px; }
.chat-msg.bot .chat-msg-time { text-align: left; }
.chat-msg.user .chat-msg-time { text-align: right; color: rgba(255,255,255,0.7); }
.typing-indicator { padding: 12px 16px !important; }
.typing-dots { display: flex; gap: 4px; align-items: center; }
.typing-dots span { width: 6px; height: 6px; background: var(--text-gray); border-radius: 50%; animation: typingBounce 1.4s infinite ease-in-out; }
.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-6px); opacity: 1; } }

/* ===== RENZHENG FORM ===== */
.renzheng-type { display: flex; gap: 16px; margin-bottom: 24px; }
.type-option { flex: 1; padding: 20px; border: 2px solid var(--border); border-radius: var(--radius-lg); text-align: center; cursor: pointer; transition: var(--transition); }
.type-option:hover { border-color: var(--primary-light); }
.type-option.selected { border-color: var(--primary); background: var(--primary-bg); }
.type-option h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.type-option p { font-size: 13px; color: var(--text-gray); }
.type-icon { font-size: 28px; margin-bottom: 8px; }

/* ===== PHONE MOCKUP ===== */
.phone-mockup { flex-shrink: 0; width: 280px; display: flex; justify-content: center; }
.phone-frame { width: 240px; height: 480px; background: #1a1a2e; border-radius: 32px; padding: 12px; box-shadow: 0 25px 60px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.1); position: relative; }
.phone-notch { width: 80px; height: 20px; background: #1a1a2e; border-radius: 0 0 12px 12px; position: absolute; top: 0; left: 50%; transform: translateX(-50%); z-index: 2; }
.phone-screen { width: 100%; height: 100%; background: #0f0f23; border-radius: 22px; overflow: hidden; display: flex; align-items: center; justify-content: center; }

.phone-call-ui { text-align: center; padding: 20px 16px; width: 100%; }
.call-avatar { width: 56px; height: 56px; margin: 20px auto 12px; background: linear-gradient(135deg, #3b82f6, #1a56db); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.call-avatar-icon { font-size: 24px; }
.call-name { font-size: 18px; font-weight: 600; color: white; margin-bottom: 4px; }
.call-number { font-size: 12px; color: rgba(255,255,255,0.5); margin-bottom: 8px; }
.call-badge { display: inline-flex; align-items: center; gap: 4px; background: rgba(34,197,94,0.15); color: #4ade80; padding: 4px 12px; border-radius: 10px; font-size: 11px; font-weight: 600; margin-bottom: 24px; }
.badge-icon { font-size: 10px; }
.call-actions { display: flex; justify-content: center; gap: 40px; margin-top: 20px; }
.call-action { text-align: center; }
.call-action-circle { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; margin: 0 auto 6px; }
.call-action span { font-size: 11px; color: rgba(255,255,255,0.6); }

/* Small phone mockup for scenarios */
.phone-mockup-sm { display: flex; justify-content: center; margin-bottom: 20px; }
.phone-frame-sm { width: 180px; height: 340px; background: #1a1a2e; border-radius: 24px; padding: 8px; box-shadow: 0 15px 40px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.1); position: relative; }
.phone-notch-sm { width: 50px; height: 12px; background: #1a1a2e; border-radius: 0 0 8px 8px; position: absolute; top: 0; left: 50%; transform: translateX(-50%); z-index: 2; }
.phone-screen-sm { width: 100%; height: 100%; background: #0f0f23; border-radius: 18px; overflow: hidden; display: flex; align-items: center; justify-content: center; }

/* Screen: outgoing call */
.screen-call-outgoing { text-align: center; padding: 12px 8px; width: 100%; }
.mini-avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 16px auto 8px; font-size: 16px; }
.mini-avatar.blue { background: linear-gradient(135deg, #3b82f6, #1a56db); }
.mini-avatar.cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.mini-avatar.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.mini-avatar.green { background: linear-gradient(135deg, #22c55e, #059669); }
.mini-avatar.gray { background: #374151; }
.mini-name { font-size: 14px; font-weight: 600; color: white; margin-bottom: 2px; }
.mini-number { font-size: 10px; color: rgba(255,255,255,0.4); margin-bottom: 6px; }
.mini-badge { display: inline-block; background: rgba(34,197,94,0.15); color: #4ade80; padding: 2px 8px; border-radius: 8px; font-size: 9px; font-weight: 600; }
.mini-status { font-size: 10px; color: rgba(255,255,255,0.4); margin-top: 16px; }

/* Screen: incoming call */
.screen-call-incoming { text-align: center; padding: 12px 8px; width: 100%; }
.mini-actions-row { display: flex; justify-content: center; gap: 32px; margin-top: 16px; }
.mini-btn-decline, .mini-btn-accept { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.mini-btn-decline { background: #ef4444; }
.mini-btn-accept { background: #22c55e; }

/* Screen: detail page */
.screen-detail { padding: 16px 12px; width: 100%; }
.detail-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.detail-avatar { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; }
.detail-avatar.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.detail-info { text-align: left; }
.detail-name { font-size: 13px; font-weight: 600; color: white; }
.detail-tag { font-size: 9px; color: #4ade80; }
.detail-number { font-size: 11px; color: rgba(255,255,255,0.5); margin-bottom: 12px; }
.detail-row { height: 8px; background: rgba(255,255,255,0.06); border-radius: 4px; margin-bottom: 8px; }
.detail-row.short { width: 60%; }

/* Screen: call list */
.screen-list { padding: 12px 8px; width: 100%; }
.list-item { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.list-avatar { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; }
.list-avatar.green { background: linear-gradient(135deg, #22c55e, #059669); }
.list-avatar.gray { background: #374151; }
.list-info { flex: 1; display: flex; align-items: center; gap: 4px; }
.list-name { font-size: 11px; font-weight: 600; color: white; }
.list-name.dim { color: rgba(255,255,255,0.4); font-weight: 400; }
.list-badge { font-size: 8px; color: #4ade80; }
.list-time { font-size: 9px; color: rgba(255,255,255,0.3); }

/* ===== ADVANTAGES SHOWCASE ===== */
.advantages-showcase { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-showcase-item { text-align: center; padding: 32px 20px; background: var(--bg-white); border-radius: var(--radius-2xl); border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden; }
.adv-showcase-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }

.adv-showcase-visual { position: relative; width: 80px; height: 80px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; }
.adv-icon-large { width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; position: relative; z-index: 1; }
.adv-icon-large.blue { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.adv-icon-large.cyan { background: linear-gradient(135deg, #cffafe, #a5f3fc); color: #0891b2; }
.adv-icon-large.purple { background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed; }
.adv-icon-large.green { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }
.adv-ring { position: absolute; inset: 0; border: 2px dashed rgba(26,86,219,0.15); border-radius: 50%; animation: ringRotate 12s linear infinite; }
@keyframes ringRotate { to { transform: rotate(360deg); } }

.adv-showcase-item h3 { font-size: 17px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.adv-showcase-item p { font-size: 13px; color: var(--text-gray); line-height: 1.6; margin-bottom: 16px; }
.adv-stat { font-size: 32px; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; }
.adv-stat span { font-size: 16px; font-weight: 600; }

/* ===== SCENARIOS SHOWCASE ===== */
.scenarios-showcase { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scenario-showcase-item { text-align: center; padding: 32px 16px; background: var(--bg-white); border-radius: var(--radius-2xl); border: 1px solid var(--border); transition: var(--transition); }
.scenario-showcase-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }
.scenario-showcase-info h3 { font-size: 17px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.scenario-showcase-info p { font-size: 13px; color: var(--text-gray); line-height: 1.6; }

/* ===== SMS PAGE ===== */
.sms-hero-phones { display: flex; gap: 12px; align-items: flex-end; flex-shrink: 0; }
.sms-phone { width: 140px; }
.sms-phone.center { width: 160px; }
.sms-phone img { width: 100%; height: auto; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,0.15); }

.sms-forms { display: flex; flex-direction: column; gap: 48px; }
.sms-form-card { display: flex; align-items: center; gap: 48px; background: var(--bg-white); border-radius: var(--radius-2xl); padding: 40px; border: 1px solid var(--border); transition: var(--transition); }
.sms-form-card:hover { box-shadow: var(--shadow-xl); border-color: transparent; }
.sms-form-card.reverse { flex-direction: row-reverse; }
.sms-form-phone { flex-shrink: 0; width: 200px; }
.sms-form-phone img { width: 100%; height: auto; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.sms-form-info { flex: 1; }
.sms-form-tag { display: inline-block; padding: 4px 14px; background: var(--primary-bg); color: var(--primary); border-radius: 12px; font-size: 12px; font-weight: 600; margin-bottom: 12px; }
.sms-form-tag.cyan { background: #cffafe; color: #0891b2; }
.sms-form-tag.purple { background: #ede9fe; color: #7c3aed; }
.sms-form-info h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.sms-form-info p { font-size: 15px; color: var(--text-gray); line-height: 1.8; }

/* ===== SOLUTIONS ===== */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: var(--bg-white); border-radius: var(--radius-2xl); padding: 36px 28px; border: 1px solid var(--border); transition: var(--transition); text-align: center; }
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.solution-card .sol-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: var(--primary-bg); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--primary); }
.solution-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.solution-card p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* ===== PRODUCT INTRO ===== */
.product-intro { display: flex; align-items: center; gap: 60px; }
.product-intro-text { flex: 1; }
.product-intro-text h2 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.product-intro-text p { font-size: 16px; color: var(--text-gray); line-height: 1.8; }
.product-intro-visual { width: 400px; height: 300px; background: linear-gradient(135deg, #dbeafe, #bfdbfe); border-radius: var(--radius-2xl); display: flex; align-items: center; justify-content: center; font-size: 80px; color: var(--primary); flex-shrink: 0; }

/* ===== HMRZ ===== */
.hmrz-intro-img { width: 480px; flex-shrink: 0; }
.hmrz-intro-img img { width: 100%; height: auto; border-radius: var(--radius-2xl); box-shadow: var(--shadow-lg); }

.hmrz-phones-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.hmrz-phone-card { background: var(--bg-white); border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); text-align: center; padding: 24px 16px; }
.hmrz-phone-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }
.hmrz-phone-card img { width: 100%; max-width: 220px; height: auto; margin: 0 auto 16px; display: block; }
.hmrz-phone-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
.hmrz-phone-card p { font-size: 13px; color: var(--text-gray); line-height: 1.6; }

/* ===== PUSH ===== */
.push-scenarios { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.push-card { background: var(--bg-white); border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.push-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.push-visual { height: 200px; display: flex; align-items: center; justify-content: center; font-size: 56px; }
.push-visual.incoming { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.push-visual.outgoing { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }
.push-info { padding: 24px; }
.push-info h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.push-info p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

.push-hero-img { width: 480px; flex-shrink: 0; }
.push-hero-img img { width: 100%; height: auto; border-radius: var(--radius-2xl); box-shadow: var(--shadow-lg); }

.push-phones-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.push-phone-card { background: var(--bg-white); border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); text-align: center; padding: 24px 16px; }
.push-phone-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent; }
.push-phone-card img { width: 100%; max-width: 220px; height: auto; margin: 0 auto 16px; display: block; }
.push-phone-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
.push-phone-card p { font-size: 13px; color: var(--text-gray); line-height: 1.6; }

/* ===== SMS ===== */
.sms-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sms-card { background: var(--bg-white); border-radius: var(--radius-2xl); padding: 36px 24px; text-align: center; border: 1px solid var(--border); transition: var(--transition); }
.sms-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.sms-card .sms-icon { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 28px; }
.sms-card .sms-icon.logo { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.sms-card .sms-icon.name { background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed; }
.sms-card .sms-icon.menu { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }
.sms-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.sms-card p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* ===== QUICKAPP ===== */
.quickapp-entries { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.quickapp-card { background: var(--bg-white); border-radius: var(--radius-2xl); padding: 32px 20px; text-align: center; border: 1px solid var(--border); transition: var(--transition); }
.quickapp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.quickapp-card .qa-icon { width: 56px; height: 56px; margin: 0 auto 16px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; font-size: 24px; }
.quickapp-card .qa-icon img { width: 100%; height: 100%; object-fit: contain; border-radius: var(--radius-lg); }
.quickapp-card .qa-icon.store { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: var(--primary); }
.quickapp-card .qa-icon.screen { background: linear-gradient(135deg, #cffafe, #a5f3fc); color: #0891b2; }
.quickapp-card .qa-icon.desktop { background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed; }
.quickapp-card .qa-icon.retain { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; }
.quickapp-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.quickapp-card p { font-size: 13px; color: var(--text-gray); line-height: 1.5; }

/* ===== COMPANY INFO ===== */
.company-info { max-width: 800px; margin: 0 auto; }
.company-info h2 { font-size: 28px; font-weight: 700; margin-bottom: 24px; text-align: center; }
.company-info p { font-size: 16px; color: var(--text-gray); line-height: 2; text-align: center; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.stat-item { text-align: center; }
.stat-item .stat-num { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.stat-item .stat-label { font-size: 14px; color: var(--text-gray); }

/* ===== TOAST ===== */
.toast { position: fixed; top: 24px; left: 50%; transform: translateX(-50%) translateY(-100px); padding: 14px 28px; border-radius: 12px; font-size: 14px; font-weight: 500; z-index: 9999; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); box-shadow: 0 10px 40px rgba(0,0,0,0.15); white-space: nowrap; }
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: linear-gradient(135deg, #059669, #10b981); color: white; }
.toast.error { background: linear-gradient(135deg, #dc2626, #ef4444); color: white; }

.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.3); border-top-color: white; border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.btn-primary:disabled { opacity: 0.7; cursor: not-allowed; }

.required { color: #ef4444; font-size: 12px; }
.form-error { display: block; font-size: 12px; color: #ef4444; margin-top: 4px; min-height: 16px; }
.form-group input.invalid, .form-group textarea.invalid { border-color: #ef4444; box-shadow: 0 0 0 3px rgba(239,68,68,0.1); }

.consult-form { max-width: 800px; margin: 0 auto; background: var(--bg-white); border-radius: var(--radius-2xl); padding: 40px; border: 1px solid var(--border); }
.consult-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

/* ===== BACK TO TOP ===== */
.back-to-top { position: fixed; bottom: 100px; right: 32px; width: 44px; height: 44px; background: var(--bg-white); border: 1px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 18px; color: var(--text-gray); z-index: 997; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all 0.3s ease; box-shadow: var(--shadow); }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary); color: white; border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ===== PAGE LOADER ===== */
.page-loader { position: fixed; inset: 0; background: var(--bg-white); z-index: 10000; display: flex; align-items: center; justify-content: center; transition: opacity 0.4s ease, visibility 0.4s ease; animation: loaderTimeout 0s 3s forwards; }
@keyframes loaderTimeout { to { opacity: 0; visibility: hidden; } }
.page-loader.loaded { opacity: 0; visibility: hidden; }
.loader-spinner { width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .product-intro { flex-direction: column; gap: 40px; }
  .product-intro-visual { width: 100%; max-width: 400px; }
  .phone-mockup { width: 100%; }
  .about-layout { flex-direction: column; }
  .about-img-wrap { width: 100%; max-width: 500px; }
  .advantages-showcase { grid-template-columns: repeat(2, 1fr); }
  .scenarios-showcase { grid-template-columns: repeat(2, 1fr); }
  .push-phones-grid { grid-template-columns: repeat(2, 1fr); }
  .push-hero-img { width: 100%; max-width: 400px; }
  .hmrz-phones-grid { grid-template-columns: repeat(2, 1fr); }
  .hmrz-intro-img { width: 100%; max-width: 400px; }
  .sms-hero-phones { flex-direction: column; align-items: center; }
  .sms-phone, .sms-phone.center { width: 180px; }
  .sms-form-card, .sms-form-card.reverse { flex-direction: column; }
  .sms-form-phone { width: 180px; }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  .nav-links { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; background: white; flex-direction: column; padding: 24px; gap: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 16px; padding: 8px 0; }
  .mobile-toggle { display: flex; }

  .hero { min-height: auto; padding-top: var(--nav-height); padding-bottom: 40px; }
  .hero-nav { display: none; }
  .hero-content h1 { font-size: 32px; }
  .hero-content p { font-size: 15px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat-num { font-size: 28px; }
  .hero-badge { font-size: 12px; }
  .hero-actions { flex-direction: column; }
  .hero-btn-primary, .hero-btn-secondary { width: 100%; justify-content: center; }

  .section { padding: 56px 0; }
  .section-header h2 { font-size: 26px; }
  .products-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .apply-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .solution-banner { flex-direction: column; text-align: center; padding: 40px 24px; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .forms-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .push-scenarios { grid-template-columns: 1fr; }
  .push-phones-grid { grid-template-columns: repeat(2, 1fr); }
  .hmrz-phones-grid { grid-template-columns: repeat(2, 1fr); }
  .sms-features { grid-template-columns: 1fr; }
  .quickapp-entries { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .chat-window { width: calc(100vw - 32px); right: 16px; bottom: 96px; height: 460px; }
  .chat-fab { bottom: 20px; right: 20px; width: 52px; height: 52px; font-size: 20px; }
  .renzheng-type { flex-direction: column; }
  .consult-grid { grid-template-columns: 1fr; }
  .consult-form { padding: 24px; }
  .back-to-top { bottom: 84px; right: 20px; width: 38px; height: 38px; font-size: 16px; }
  .banner-page h1 { font-size: 28px; }
  .cooperation-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .cta-block { flex-direction: column; text-align: center; padding: 40px 24px; gap: 24px; }
  .cta-actions { justify-content: center; }
}

@media (max-width: 480px) {
  .cases-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .quickapp-entries { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
  .advantages-showcase { grid-template-columns: 1fr; }
  .scenarios-showcase { grid-template-columns: 1fr; }
  .push-phones-grid { grid-template-columns: 1fr; }
  .hmrz-phones-grid { grid-template-columns: 1fr; }
  .cooperation-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .cooperation-card { padding: 20px 12px; }
  .cooperation-logo-wrap { width: 80px; height: 56px; }
}