/* ============================================
   澜星脑科学 - 官网样式系统
   主色调：深绿 | 辅色：科技蓝、白
   ============================================ */

/* CSS Variables */
:root {
  /* Accent - Brand Green (used sparingly as accent) */
  --green-900: #1c2c11;
  --green-800: #2f491d;
  --green-700: #538233;
  --green-600: #69a541;
  --green-500: #83be5a;
  --green-400: #a1ce82;
  --green-300: #bddda7;
  --green-200: #d8ebcc;
  --green-100: #ecf5e5;
  --green-50: #f5faf1;

  /* Tech Blue */
  --blue-700: #0E5A8A;
  --blue-600: #1A7AB5;
  --blue-500: #1A9CDB;
  --blue-400: #4DB8E8;
  --blue-300: #80D0EF;
  --blue-100: #E0F4FB;
  --blue-50: #F0FAFD;

  /* Warm Neutrals */
  --white: #FFFFFF;
  --bg-alt: #FAF7F2;
  --bg-dark: #2C2420;
  --text-dark: #2C2C2A;
  --text-body: #5A5652;
  --text-light: #8A8682;
  --text-muted: #B0ACA8;
  --border: #E8E3DC;
  --border-light: #F2EEEA;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
  --shadow-blue: 0 4px 24px rgba(26, 156, 219, 0.1);

  /* Layout */
  --container: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Gradients - soft, used sparingly */
  --grad-green: linear-gradient(135deg, #69a541 0%, #83be5a 100%);
  --grad-green-dark: linear-gradient(160deg, #538233 0%, #69a541 100%);
  --grad-blue: linear-gradient(135deg, #1A9CDB 0%, #4DB8E8 100%);
  --grad-tech: linear-gradient(135deg, #69a541 0%, #1A7AB5 100%);
  --grad-hero: transparent;
}

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

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-body);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

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

.container-sm {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-sm {
  padding: 56px 0;
}

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

.section-bg-green {
  background: var(--bg-alt);
  color: var(--text-body);
  border-top: 3px solid var(--green-400);
  border-bottom: 3px solid var(--green-400);
}

.section-bg-blue {
  background: linear-gradient(160deg, var(--blue-50) 0%, var(--white) 100%);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
}

.section-bg-green h1,
.section-bg-green h2,
.section-bg-green h3,
.section-bg-green h4 {
  color: var(--text-dark);
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.6rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.05rem; }

.text-gradient {
  background: var(--grad-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-blue { color: var(--blue-500); }
.text-green { color: var(--green-700); }

/* Section Header */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-header .eyebrow {
  display: inline-block;
  padding: 6px 16px;
  background: var(--green-100);
  color: var(--green-700);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.section-header .eyebrow.blue {
  background: var(--blue-100);
  color: var(--blue-600);
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.05rem;
}

.section-bg-green .section-header p {
  color: var(--text-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-green);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(83, 130, 51, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(83, 130, 51, 0.4);
}

.btn-blue {
  background: var(--grad-blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(26, 156, 219, 0.3);
}

.btn-blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(26, 156, 219, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--green-700);
  border: 2px solid var(--green-700);
}

.btn-outline:hover {
  background: var(--green-700);
  color: var(--white);
}

.btn-outline-white, .btn-outline-light {
  background: transparent;
  color: var(--green-700);
  border: 2px solid var(--green-300);
}

.btn-outline-white:hover, .btn-outline-light:hover {
  background: var(--green-50);
  border-color: var(--green-700);
  color: var(--green-700);
}

.btn-white {
  background: var(--white);
  color: var(--green-700);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.9rem;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--green-700);
}

.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--grad-green);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.2rem;
}

.nav-logo .logo-img {
  height: 42px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.nav-logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo .logo-text .sub {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--green-700);
  background: var(--green-50);
}

.nav-link .arrow {
  font-size: 0.7rem;
  transition: transform var(--transition);
}

.nav-item:hover .nav-link .arrow {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text-body);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-dropdown a:hover {
  background: var(--green-50);
  color: var(--green-700);
}

.nav-cta {
  margin-left: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================
   Hero Section - Full background image with text overlay
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 60px;
  background: #ffffff;
  overflow: hidden;
}
.hero-full-bg {
  background: #1a1a2e;
}

/* 背景图 */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 82% center;
  display: block;
}
/* 左侧白色遮罩层，确保文字可读 */
.hero-full-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.88) 35%,
    rgba(255, 255, 255, 0.65) 55%,
    rgba(255, 255, 255, 0.2) 75%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
}

/* 文字内容 */
.hero-content {
  position: relative;
  z-index: 3;
  width: 100%;
}
.hero-full-bg .container {
  max-width: 100%;
  padding-left: 0;
  padding-right: 0;
  margin: 0;
}
.hero-text-left {
  max-width: 700px;
  padding-left: 24px;
}

/* 文字主题 */
.hero-text-left h1 {
  color: #1a1a2e;
  font-size: 3.4rem;
  line-height: 1.18;
  margin-bottom: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.hero-text-left h1 .highlight {
  color: #538233;
  background: none;
  -webkit-text-fill-color: #538233;
}

/* 顶部小标签 + 线条 */
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #538233;
  letter-spacing: 0.5px;
}
.hero-eyebrow-line {
  display: inline-block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #538233, #1A9CDB);
  border-radius: 2px;
}

/* 副标题 */
.hero-text-left .hero-subtitle {
  font-size: 1.05rem;
  color: #4a4a4a;
  margin-bottom: 36px;
  line-height: 1.7;
  max-width: 520px;
  letter-spacing: 0.3px;
}

/* CTA 按钮 */
.hero-text-left .hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: nowrap;
  margin-bottom: 48px;
}
.hero-text-left .hero-cta .btn {
  padding: 12px 22px;
  font-size: 0.95rem;
}

/* 数据指标 */
.hero-text-left .hero-stats {
  display: flex;
  gap: 36px;
  padding-top: 28px;
  border-top: 1px solid rgba(83, 130, 51, 0.2);
  max-width: 560px;
}
.hero-text-left .hero-stat .num {
  font-size: 1.85rem;
  font-weight: 700;
  color: #538233;
  line-height: 1.1;
  margin-bottom: 6px;
}
.hero-text-left .hero-stat .label {
  font-size: 0.82rem;
  color: #777;
  letter-spacing: 0.3px;
}

/* 保留旧 split 样式作为 fallback */
.hero-split {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}
.hero-text {
  position: relative;
  z-index: 3;
  color: var(--text-dark);
}
.hero-photo {
  position: relative;
  z-index: 1;
  border-radius: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: none;
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  border-radius: 0;
}

@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-photo {
    max-width: 100%;
    aspect-ratio: 16 / 9;
    order: -1;
  }
  .hero-text {
    order: 0;
  }
  .hero-bg img {
    object-position: 80% center;
  }
  .hero-full-bg::before {
    background: linear-gradient(
      to right,
      rgba(255, 255, 255, 0.96) 0%,
      rgba(255, 255, 255, 0.82) 45%,
      rgba(255, 255, 255, 0.35) 70%,
      rgba(255, 255, 255, 0) 100%
    );
  }
  .hero-full-bg .container {
    padding-left: 0;
  }
  .hero-text-left {
    padding-left: 16px;
  }
  .hero-text-left h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 100px 0 40px;
    min-height: auto;
  }
  .hero-bg img {
    object-position: 75% center;
  }
  .hero-full-bg::before {
    background: linear-gradient(
      to right,
      rgba(255, 255, 255, 0.97) 0%,
      rgba(255, 255, 255, 0.88) 55%,
      rgba(255, 255, 255, 0.55) 100%
    );
  }
  .hero-full-bg .container {
    padding-left: 0;
  }
  .hero-text-left {
    padding-left: 12px;
  }
  .hero-text-left h1 {
    font-size: 2.2rem;
  }
  .hero-text-left .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(83, 130, 51, 0.08);
  border: 1px solid rgba(83, 130, 51, 0.15);
  border-radius: 24px;
  font-size: 0.85rem; font-weight: 500;
  color: var(--green-700);
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  background: var(--green-500);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}
.hero-text h1 {
  color: var(--text-dark);
  font-size: 3.2rem; line-height: 1.2;
  margin-bottom: 20px;
}
.hero-text h1 .highlight {
  color: var(--green-600);
  background: none;
  -webkit-text-fill-color: var(--green-600);
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-body);
  margin-bottom: 36px;
  line-height: 1.6;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: 40px;
  margin-top: 48px; padding-top: 32px;
  border-top: 1px solid var(--border);
}
.hero-stat .num {
  font-size: 2rem; font-weight: 700;
  color: var(--text-dark);
}
.hero-stat .label {
  font-size: 0.85rem;
  color: var(--text-light);
}



/* Neural network lines */
.neural-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.neural-lines svg {
  width: 100%;
  height: 100%;
}

/* Page Hero (smaller for inner pages) */
.page-hero {
  position: relative;
  padding: 140px 0 80px;
  background: var(--bg-alt);
  color: var(--text-dark);
  overflow: hidden;
  border-bottom: 3px solid var(--green-400);
}

.page-hero.has-bg {
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.78) 0%, rgba(255, 255, 255, 0.42) 55%, rgba(255, 255, 255, 0.18) 100%),
    var(--hero-bg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 70% 30%, rgba(26, 156, 219, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 30% 70%, rgba(131, 190, 90, 0.15) 0%, transparent 50%);
}

.page-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(83, 130, 51, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(83, 130, 51, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  color: var(--text-dark);
  font-size: 2.6rem;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--text-body);
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a:hover {
  color: var(--green-600);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.card-icon.green { background: var(--green-100); color: var(--green-700); }
.card-icon.blue { background: var(--blue-100); color: var(--blue-600); }

.card h4 {
  margin-bottom: 12px;
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* Condition Cards (六宫格) */
.condition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.condition-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  overflow: hidden;
}

.condition-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--grad-green);
  opacity: 0;
  transition: opacity var(--transition);
}

.condition-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--green-200);
}

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

.condition-card .icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  background: var(--green-50);
}

.condition-card:nth-child(even) .icon {
  background: var(--blue-50);
}

.condition-card h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.condition-card .keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.condition-card .keywords span {
  font-size: 0.78rem;
  padding: 4px 12px;
  background: var(--green-50);
  color: var(--green-600);
  border-radius: 12px;
}

.condition-card:nth-child(even) .keywords span {
  background: var(--blue-50);
  color: var(--blue-600);
}

.condition-card .arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-700);
}

.condition-card:nth-child(even) .arrow-link {
  color: var(--blue-600);
}

.condition-card .arrow-link:hover {
  gap: 10px;
}

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

.stat-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad-green);
}

.stat-card:nth-child(even)::before {
  background: var(--grad-blue);
}

.stat-card .stat-value {
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--grad-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-card:nth-child(even) .stat-value {
  background: var(--grad-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
}

.stat-card .stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Logo Wall */
.logo-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.logo-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 140px;
  height: 100px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.logo-badge:hover {
  border-color: var(--green-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.logo-badge .logo-text-badge {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green-700);
}

.logo-badge .logo-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--green-300), var(--green-700));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 40px 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding: 0 0 40px 40px;
}

.timeline-item .timeline-dot {
  position: absolute;
  right: -8px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--green-700);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--green-200);
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -8px;
  right: auto;
}

.timeline-item .timeline-content {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.timeline-item .timeline-content:hover {
  box-shadow: var(--shadow-md);
}

.timeline-item .year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--green-700);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.95rem;
  color: var(--text-body);
}

/* Expert Card */
.expert-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.expert-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.expert-avatar {
  width: 100%;
  height: 200px;
  background: var(--grad-green-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: rgba(255, 255, 255, 0.9);
}

.expert-card:nth-child(2) .expert-avatar {
  background: linear-gradient(160deg, var(--blue-700), var(--blue-500));
}

.expert-card:nth-child(3) .expert-avatar {
  background: linear-gradient(160deg, var(--green-800), var(--blue-600));
}

.expert-info {
  padding: 24px;
}

.expert-info .name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.expert-info .title {
  font-size: 0.9rem;
  color: var(--green-700);
  font-weight: 500;
  margin-bottom: 14px;
}

.expert-info ul {
  list-style: none;
}

.expert-info ul li {
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 4px 0;
  padding-left: 18px;
  position: relative;
}

.expert-info ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-400);
}

/* Comparison Table */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compare-table th,
.compare-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.compare-table th {
  background: var(--green-50);
  color: var(--green-700);
  font-weight: 700;
  font-size: 0.95rem;
}

.compare-table th:nth-child(2),
.compare-table td:nth-child(2) {
  background: rgba(83, 130, 51, 0.03);
}

.compare-table td {
  font-size: 0.92rem;
  color: var(--text-body);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table .check {
  color: var(--green-500);
  font-weight: 700;
}

.compare-table .cross {
  color: var(--text-muted);
}

/* Patent Card */
.patent-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.patent-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-sm);
}

.patent-card .patent-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--grad-green);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
}

.patent-card .patent-info h5 {
  color: var(--text-dark);
  margin-bottom: 4px;
}

.patent-card .patent-info .patent-id {
  font-size: 0.8rem;
  color: var(--blue-600);
  font-family: 'Courier New', monospace;
  margin-bottom: 6px;
}

.patent-card .patent-info p {
  font-size: 0.88rem;
  color: var(--text-light);
}

/* Process Steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step .step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--grad-green);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
  position: relative;
  z-index: 2;
}

.process-step:nth-child(2) .step-num {
  background: var(--grad-blue);
}

.process-step:nth-child(3) .step-num {
  background: linear-gradient(135deg, var(--green-600), var(--blue-600));
}

.process-step h4 {
  margin-bottom: 12px;
}

.process-step p {
  font-size: 0.92rem;
  color: var(--text-light);
  text-align: left;
}

.process-step ul {
  text-align: left;
  margin-top: 12px;
}

.process-step ul li {
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 4px 0;
  padding-left: 18px;
  position: relative;
}

.process-step ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green-500);
  font-weight: 700;
}

/* Process Flow Horizontal */
.process-flow {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.process-flow-item {
  flex: 1;
  min-width: 180px;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  position: relative;
}

.process-flow-item .step-label {
  font-size: 0.8rem;
  color: var(--green-600);
  font-weight: 600;
  margin-bottom: 8px;
}

.process-flow-item h5 {
  color: var(--text-dark);
  margin-bottom: 6px;
}

.process-flow-item p {
  font-size: 0.82rem;
  color: var(--text-light);
}

.process-flow-arrow {
  color: var(--green-400);
  font-size: 1.5rem;
}

/* Feature List */
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
}

.feature-item .check-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-500);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--text-body);
}

/* CTA Section */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--bg-alt);
  color: var(--text-body);
  text-align: center;
  overflow: hidden;
  border-top: 3px solid var(--green-400);
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(26, 156, 219, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(83, 130, 51, 0.08) 0%, transparent 50%);
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  color: var(--text-dark);
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* Override btn-white inside CTA to use green gradient on light background */
.cta-section .btn-white {
  background: var(--grad-green);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(83, 130, 51, 0.3);
}

.cta-section .btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(83, 130, 51, 0.4);
}

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

/* Contact Info Cards */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.contact-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-light);
  text-align: center;
  transition: all var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
}

.contact-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--green-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
}

.contact-card h4 {
  margin-bottom: 8px;
}

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

.contact-card .phone {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--green-700);
}

/* Form */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group label .required {
  color: #e74c3c;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  background: var(--white);
}

.form-control:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(83, 130, 51, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

select.form-control {
  cursor: pointer;
}

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

/* FAQ */
.faq-item {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.active {
  border-color: var(--green-200);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 0.98rem;
}

.faq-question .toggle {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--green-50);
  color: var(--green-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
}

.faq-item.active .toggle {
  background: var(--green-700);
  color: var(--white);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition), padding var(--transition);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--border-light);
  overflow-x: auto;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition);
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--green-700);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.tab-btn.active {
  color: var(--green-700);
  font-weight: 600;
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Content Block */
.content-block {
  margin-bottom: 48px;
}

.content-block h3 {
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 4px solid var(--green-700);
}

.content-block p {
  margin-bottom: 12px;
  color: var(--text-body);
}

.content-block ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.content-block ul li {
  list-style: disc;
  padding: 4px 0;
  color: var(--text-body);
}

/* Info Box */
.info-box {
  background: var(--green-50);
  border-left: 4px solid var(--green-500);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
}

.info-box.blue {
  background: var(--blue-50);
  border-left-color: var(--blue-500);
}

.info-box h5 {
  color: var(--green-700);
  margin-bottom: 8px;
}

.info-box.blue h5 {
  color: var(--blue-600);
}

.info-box p {
  font-size: 0.9rem;
  color: var(--text-body);
}

/* Data Chart Bar */
.data-bar {
  margin-bottom: 20px;
}

.data-bar .bar-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.data-bar .bar-label .name { color: var(--text-dark); font-weight: 500; }
.data-bar .bar-label .value { color: var(--green-700); font-weight: 700; }

.data-bar .bar-track {
  height: 12px;
  background: var(--border-light);
  border-radius: 6px;
  overflow: hidden;
}

.data-bar .bar-fill {
  height: 100%;
  border-radius: 6px;
  background: var(--grad-green);
  transition: width 1s ease;
}

.data-bar .bar-fill.blue {
  background: var(--grad-blue);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: #2f3a2a;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
}

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

.footer-brand .nav-logo {
  color: var(--white);
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.96);
  padding: 10px 16px;
  border-radius: 12px;
  width: fit-content;
}

.footer-brand .nav-logo .logo-img {
  height: 44px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-brand .contact-info {
  font-size: 0.85rem;
}

.footer-brand .contact-info p {
  margin-bottom: 6px;
}

.footer-col h5 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition);
}

.footer-col ul li a:hover {
  color: var(--green-300);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
  color: var(--green-300);
}

/* QR Code */
.qr-codes {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

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

.qr-item .qr-placeholder {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 6px;
}

.qr-item .qr-img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: var(--white);
  padding: 4px;
  margin-bottom: 6px;
}

.content-image {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.content-image.rounded {
  border-radius: var(--radius-lg);
}

.qr-item .qr-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Floating Widgets
   ============================================ */
.float-widgets {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--green-700);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  position: relative;
}

.float-btn:hover {
  transform: scale(1.1);
  background: var(--green-800);
}

.float-btn.blue {
  background: var(--blue-500);
}

.float-btn.blue:hover {
  background: var(--blue-600);
}

.float-btn.white {
  background: var(--white);
  color: var(--green-700);
  border: 1px solid var(--border);
}

.float-btn.white:hover {
  background: var(--green-50);
}

.float-btn.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.float-btn .tooltip {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--text-dark);
  color: var(--white);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.float-btn:hover .tooltip {
  opacity: 1;
  visibility: visible;
}

/* Chat Popup */
.chat-popup {
  position: fixed;
  right: 24px;
  bottom: 90px;
  width: 340px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  display: none;
  overflow: hidden;
}

.chat-popup.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.chat-popup .chat-header {
  background: var(--grad-green);
  color: var(--white);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-popup .chat-header .chat-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-popup .chat-header .chat-title .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-popup .chat-header .close-btn {
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 1.3rem;
  cursor: pointer;
}

.chat-popup .chat-body {
  padding: 20px;
}

.chat-popup .chat-body .msg {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--text-body);
  margin-bottom: 16px;
}

.chat-popup .chat-body .quick-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-popup .chat-body .quick-action {
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--green-700);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.chat-popup .chat-body .quick-action:hover {
  background: var(--green-50);
  border-color: var(--green-300);
}

/* ============================================
   Animations
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .hero-content { max-width: 520px; }
  .hero-visual { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .condition-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }

  .section { padding: 56px 0; }

  .nav-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    gap: 0;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-item { width: 100%; }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 0 16px;
    min-width: auto;
  }

  .nav-cta { margin: 12px 0 0; width: 100%; }
  .nav-cta .btn { width: 100%; }

  .nav-toggle { display: flex; }

  .hero { min-height: auto; padding: 120px 0 48px; }
  .hero-text h1 { font-size: 2.2rem; }
  .hero-stats { flex-direction: column; gap: 16px; }

  .page-hero { padding: 120px 0 56px; }
  .page-hero h1 { font-size: 2rem; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .condition-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; padding: 0 0 32px 48px; }
  .timeline-item:nth-child(even) { left: 0; padding: 0 0 32px 48px; }
  .timeline-item .timeline-dot { left: 12px; right: auto; }
  .timeline-item:nth-child(even) .timeline-dot { left: 12px; }

  .process-flow { flex-direction: column; }
  .process-flow-arrow { transform: rotate(90deg); }

  .chat-popup { width: calc(100vw - 32px); right: 16px; }
}