/* ============================================================
   恒汐能量 HENGXI ENERGY — Complete Design System
   Extracted from single-file HTML to separate CSS
   ============================================================ */

/* ========== CSS Reset & Variables ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #4A5568;
  background: #FFFFFF;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

:root {
  --primary: #0A2E5C;
  --cyan: #00BCD4;
  --bright-cyan: #00E5FF;
  --dark-card: #0D3654;
  --bg-white: #FFFFFF;
  --bg-light: #F7FAFC;
  --bg-light-blue: #E8F6F9;
  --text-title: #1A2A3A;
  --text-body: #4A5568;
  --text-muted: #718096;
  --text-dark: #FFFFFF;
  --text-dark-muted: #B8C5D6;
  --border-light: #E2E8F0;
  --brand-gradient: linear-gradient(135deg, #0A2E5C, #00BCD4);
  --shadow-sm: 0 2px 8px rgba(10, 46, 92, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 46, 92, 0.08);
  --shadow-lg: 0 16px 48px rgba(10, 46, 92, 0.12);
  --shadow-hover: 0 20px 60px rgba(0, 188, 212, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}

/* ========== Layout Helpers ========== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Section Generic ========== */
.section {
  padding: 120px 0;
  position: relative;
}
.section-dark {
  background: var(--primary);
  color: var(--text-dark);
}
.section-light {
  background: var(--bg-white);
}
.section-gray {
  background: var(--bg-light);
}
.section-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--cyan);
  margin-bottom: 16px;
  position: relative;
}
.section-dark .section-tag {
  color: var(--bright-cyan);
}
.section-title {
  font-size: 44px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.section-dark .section-title {
  color: var(--text-dark);
}
.section-subtitle {
  font-size: 18px;
  color: var(--text-body);
  max-width: 680px;
  line-height: 1.8;
}
.section-dark .section-subtitle {
  color: var(--text-dark-muted);
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header .section-subtitle {
  margin: 0 auto;
}

/* ========== Reveal Animation ========== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
  padding: 20px 0;
  background: transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 20px rgba(10, 46, 92, 0.08);
  padding: 14px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo img {
  height: 38px;
  width: auto;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-title);
  transition: var(--transition);
  position: relative;
}
.nav-menu a:hover {
  color: var(--cyan);
}
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: var(--transition);
  transform: translateX(-50%);
}
.nav-menu a:hover::after {
  width: 100%;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: var(--cyan);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 100px;
  transition: var(--transition);
}
.nav-cta:hover {
  background: #00A5BA;
  box-shadow: 0 6px 20px rgba(0, 188, 212, 0.35);
  transform: translateY(-1px);
}
.nav-cta svg {
  width: 14px;
  height: 14px;
  transition: var(--transition);
}
.nav-cta:hover svg {
  transform: translateX(3px);
}
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-title);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(180deg, #FFFFFF 0%, #F0F9FB 100%);
  overflow: hidden;
  padding: 160px 0 120px;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(10, 46, 92, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 46, 92, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
}
.hero-glow-1 {
  position: absolute;
  top: 20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 188, 212, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-glow-2 {
  position: absolute;
  bottom: 10%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 188, 212, 0.1);
  border: 1px solid rgba(0, 188, 212, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 2px;
  margin-bottom: 28px;
}
.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: var(--text-title);
  text-align: center;
}
.hero-title .highlight {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 19px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
}
.hero-badge svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
}
.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: var(--cyan);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 100px;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(0, 188, 212, 0.25);
}
.btn-primary:hover {
  background: #00A5BA;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 188, 212, 0.35);
}
.btn-primary svg {
  width: 18px;
  height: 18px;
  transition: var(--transition);
}
.btn-primary:hover svg {
  transform: translateX(4px);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: transparent;
  color: var(--cyan);
  font-size: 16px;
  font-weight: 600;
  border: 2px solid var(--cyan);
  border-radius: 100px;
  transition: var(--transition);
}
.btn-secondary:hover {
  background: rgba(0, 188, 212, 0.08);
  transform: translateY(-2px);
}
.btn-secondary svg {
  width: 18px;
  height: 18px;
  transition: var(--transition);
}
.btn-secondary:hover svg {
  transform: translateX(4px);
}

.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: 13px;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
.hero-scroll svg {
  width: 20px;
  height: 20px;
}

/* ========== Stats Section (Insights) ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.stat-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.stat-number {
  font-size: 52px;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 12px;
  font-family: "Noto Sans SC", sans-serif;
  letter-spacing: -1px;
}
.stat-label {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}
.stat-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}
.insight-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-light-blue);
  border-radius: var(--radius-lg);
  padding: 28px 40px;
  flex-wrap: wrap;
  gap: 16px;
}
.insight-banner-text {
  font-size: 16px;
  color: var(--text-title);
  font-weight: 500;
}
.insight-banner-text strong {
  color: var(--cyan);
  font-weight: 700;
}
.insight-banner-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cyan);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.insight-banner-link:hover {
  gap: 10px;
}
.insight-banner-link svg {
  width: 16px;
  height: 16px;
}

/* ========== GEO Section ========== */
.geo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.geo-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}
.geo-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.geo-card-number {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 64px;
  font-weight: 900;
  color: rgba(0, 188, 212, 0.08);
  line-height: 1;
  font-family: "Noto Sans SC", sans-serif;
}
.geo-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 188, 212, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  color: var(--cyan);
}
.geo-card-icon svg {
  width: 24px;
  height: 24px;
}
.geo-card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.geo-card-desc {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.75;
  position: relative;
  z-index: 1;
}
.geo-definition {
  background: var(--bg-light-blue);
  border-left: 4px solid var(--cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 28px 32px;
  margin-top: 32px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}
.geo-definition-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.geo-definition-text {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.8;
}

/* ========== Engine Section ========== */
.engine-section {
  background: linear-gradient(180deg, #FFFFFF 0%, #F0F9FB 50%, #FFFFFF 100%);
  color: var(--text-body);
  padding: 140px 0;
  position: relative;
  overflow: hidden;
}
.engine-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(0, 188, 212, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(0, 229, 255, 0.06) 0%, transparent 50%);
  pointer-events: none;
}
.engine-section .section-title {
  color: var(--text-title);
}
.engine-section .section-subtitle {
  color: var(--text-body);
}
.engine-section .section-tag {
  color: var(--cyan);
}
.engine-section .section-header {
  position: relative;
  z-index: 2;
}
.engine-visual {
  position: relative;
  z-index: 2;
  max-width: 60%;
  margin: 40px auto 56px;
}
.engine-visual img {
  width: 100%;
  height: auto;
}
.engine-above {
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  z-index: 2;
}
.engine-above-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 188, 212, 0.1);
  border: 1px solid rgba(0, 188, 212, 0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.engine-above-items {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.engine-above-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text-title);
  font-weight: 600;
}
.engine-above-item svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
}
.engine-modules {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 2;
  margin-top: 24px;
}
.engine-below-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(10, 46, 92, 0.06);
  border: 1px solid rgba(10, 46, 92, 0.12);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.engine-below {
  position: relative;
  z-index: 2;
}
.engine-module {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
}
.engine-module:hover {
  border-color: var(--cyan);
  box-shadow: 0 12px 32px rgba(0, 188, 212, 0.12);
  transform: translateY(-4px);
}
.engine-module-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(0, 188, 212, 0.1);
  border: 1px solid rgba(0, 188, 212, 0.25);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 16px;
}
.engine-module-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 12px;
}
.engine-module-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.engine-module-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}
.engine-module-feature::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--cyan);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ========== Services Section ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: left;
}
.service-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.service-card:hover::before {
  transform: scaleX(1);
}
.service-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.1), rgba(0, 229, 255, 0.1));
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  color: var(--cyan);
}
.service-card-icon svg {
  width: 28px;
  height: 28px;
}
.service-card-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 14px;
}
.service-card-desc {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 20px;
}
.service-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.service-tag {
  padding: 4px 12px;
  background: var(--bg-light-blue);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--cyan);
}

/* ========== Process Section ========== */
.process-section {
  background: var(--bg-light);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}
.process-step {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
  text-align: center;
}
.process-step:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -12px;
  width: 24px;
  height: 24px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300BCD4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='9 18 15 12 9 6'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;
  background-size: contain;
  transform: translateY(-50%);
  z-index: 1;
}
.process-step:last-child::after {
  display: none;
}
.process-step-number {
  font-size: 40px;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 14px;
  font-family: "Noto Sans SC", sans-serif;
  opacity: 0.8;
}
.process-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 10px;
}
.process-step-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== Platforms Section ========== */
.platforms-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
.platform-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-title);
  transition: var(--transition);
}
.platform-card:hover {
  border-color: var(--cyan);
  background: var(--bg-light-blue);
  color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 188, 212, 0.12);
}
.platform-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}
.platform-icon .pf-icon-img {
  width: 22px;
  height: 22px;
  object-fit: contain;
  border-radius: 3px;
}

/* ========== Cases Section ========== */
.cases-section {
  background: var(--bg-light);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.case-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.case-badge {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 6px 14px;
  background: rgba(0, 188, 212, 0.1);
  border: 1px solid rgba(0, 188, 212, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
}
.case-header {
  position: relative;
  height: 160px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
}
.case-header-title {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  padding: 0 20px;
}
.case-body {
  padding: 28px;
}
.case-industry {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light-blue);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  margin-bottom: 14px;
}
.case-service {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.case-result {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}
.case-result strong {
  color: var(--cyan);
  font-weight: 700;
}

/* ========== Advantages Section ========== */
.advantages-section {
  background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFC 100%);
  color: var(--text-body);
}
.advantages-section .section-tag {
  color: var(--cyan);
}
.advantages-section .section-title {
  color: var(--text-title);
}
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.advantage-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--brand-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.advantage-card:hover {
  border-color: var(--cyan);
  box-shadow: 0 16px 48px rgba(0, 188, 212, 0.12);
  transform: translateY(-4px);
}
.advantage-card:hover::before {
  opacity: 1;
}
.advantage-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.1), rgba(0, 229, 255, 0.1));
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  color: var(--cyan);
}
.advantage-icon svg {
  width: 26px;
  height: 26px;
}
.advantage-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 14px;
}
.advantage-desc {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
}

/* ========== CTA Section ========== */
.cta-section {
  background: linear-gradient(135deg, #E8F6F9 0%, #F0F9FB 50%, #FFFFFF 100%);
  color: var(--text-body);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 188, 212, 0.15) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.1) 0%, transparent 60%);
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 2;
}
.cta-title {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.cta-subtitle {
  font-size: 18px;
  color: var(--text-body);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 44px;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  border-radius: 100px;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(10, 46, 92, 0.2);
}
.btn-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(10, 46, 92, 0.28);
  filter: brightness(1.08);
}
.btn-cta svg {
  width: 20px;
  height: 20px;
  transition: var(--transition);
}
.btn-cta:hover svg {
  transform: translateX(5px);
}
.cta-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-note-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cta-note-item svg {
  width: 16px;
  height: 16px;
  color: var(--cyan);
}

/* ========== Footer ========== */
.footer {
  background: #F7FAFC;
  color: var(--text-body);
  padding: 80px 0 32px;
  border-top: 1px solid var(--border-light);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-brand img {
  height: 40px;
  width: auto;
  margin-bottom: 20px;
}
.footer-company {
  font-size: 15px;
  color: var(--text-title);
  font-weight: 600;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}
.footer-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 20px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--cyan);
}
.footer-contact-item {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 10px;
  color: var(--text-muted);
}
.footer-contact-item strong {
  color: var(--text-title);
  font-weight: 600;
  display: block;
  margin-bottom: 2px;
}
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border-light);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== Mobile Menu ========== */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 46, 92, 0.5);
  z-index: 999;
  backdrop-filter: blur(4px);
}
.mobile-nav-overlay.active {
  display: block;
}
.mobile-nav-panel {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 320px;
  height: 100vh;
  background: #fff;
  z-index: 1001;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 24px;
  overflow-y: auto;
  box-shadow: -8px 0 24px rgba(10, 46, 92, 0.1);
}
.mobile-nav-panel.active {
  right: 0;
}
.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-title);
}
.mobile-nav-close svg {
  width: 22px;
  height: 22px;
}
.mobile-nav-logo {
  margin-bottom: 28px;
  padding-right: 40px;
}
.mobile-nav-logo img {
  height: 34px;
}
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 28px;
}
.mobile-nav-links a {
  padding: 14px 12px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-title);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-nav-links a:hover {
  background: var(--bg-light-blue);
  color: var(--cyan);
}
.mobile-nav-cta {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: var(--cyan);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 100px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .section { padding: 90px 0; }
  .section-title { font-size: 36px; }
  .hero-title { font-size: 48px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .geo-grid { grid-template-columns: repeat(2, 1fr); }
  .engine-modules { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .process-step::after { display: none; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .engine-visual { max-width: 80%; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-cta { display: none; }
  .mobile-menu-btn { display: flex; }
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 48px; }
  .section-title { font-size: 28px; }
  .section-subtitle { font-size: 15px; }
  .hero { padding: 120px 0 80px; }
  .hero-tag { font-size: 11px; letter-spacing: 1px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-badges { flex-direction: column; gap: 12px; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 44px; }
  .geo-grid { grid-template-columns: 1fr; }
  .engine-modules { grid-template-columns: 1fr; }
  .engine-visual { max-width: 100%; }
  .engine-above-items { gap: 16px; flex-direction: column; }
  .services-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .cta-title { font-size: 28px; }
  .cta-subtitle { font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .insight-banner { padding: 20px; text-align: center; }
  .insight-banner-text { font-size: 14px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 30px; }
  .section-title { font-size: 24px; }
  .platform-card { padding: 10px 20px; font-size: 13px; }
}