/* ============================================================
   牛账教育招商加盟官网 - Design System
   B2B风格：稳重、专业、信任、高端
   ============================================================ */

:root {
  /* Brand Colors - 沉稳商务蓝 + 金色点缀 */
  --brand-primary: #1A56DB;
  --brand-primary-dark: #0F3FA8;
  --brand-primary-light: #3B7BE8;
  --brand-secondary: #0EA5A0;
  --brand-gold: #D4A24C;
  --brand-gold-light: #E8C37A;
  --brand-accent: #F59E0B;

  /* Neutral Colors */
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --text-disabled: #94A3B8;
  --text-inverse: #FFFFFF;

  /* Backgrounds */
  --bg-white: #FFFFFF;
  --bg-gray-50: #F8FAFC;
  --bg-gray-100: #F1F5F9;
  --bg-gray-200: #E2E8F0;
  --bg-dark: #0F172A;
  --bg-dark-2: #1E293B;
  --bg-brand-soft: #EFF6FF;

  /* Borders */
  --border-color: #E2E8F0;
  --border-color-light: #F1F5F9;
  --border-radius-sm: 6px;
  --border-radius-md: 10px;
  --border-radius-lg: 14px;
  --border-radius-xl: 20px;
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 24px 56px rgba(15, 23, 42, 0.18);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "WenQuanYi Micro Hei", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 15px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 22px;
  --font-size-3xl: 28px;
  --font-size-4xl: 36px;
  --font-size-5xl: 44px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--brand-primary-dark); }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--font-size-5xl); font-weight: 800; }
h2 { font-size: var(--font-size-4xl); font-weight: 700; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section { padding: var(--space-20) 0; }
.section--gray { background: var(--bg-gray-50); }
.section--dark { background: var(--bg-dark); color: #CBD5E1; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: white; }

.section__head { text-align: center; margin-bottom: var(--space-12); }
.section__label {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-brand-soft);
  color: var(--brand-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}
.section__title { font-size: var(--font-size-4xl); margin-bottom: var(--space-4); }
.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition-fast);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.logo__mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 16px;
}
.logo__text-group { display: flex; flex-direction: column; line-height: 1.2; }
.logo__text-main {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: var(--font-size-lg);
}
.logo__text-sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav { display: flex; align-items: center; gap: var(--space-8); }
.nav__list { display: flex; align-items: center; gap: var(--space-6); }
.nav__item { position: relative; }
.nav__link {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: var(--space-2) 0;
  display: block;
  transition: color var(--transition-fast);
  position: relative;
}
.nav__link:hover, .nav__link--active { color: var(--brand-primary); }
.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-primary);
  border-radius: var(--border-radius-full);
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}
.nav__item:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}
.nav__dropdown a:hover {
  background: var(--bg-brand-soft);
  color: var(--brand-primary);
}

.header__actions { display: flex; align-items: center; gap: var(--space-3); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}
.btn--primary {
  background: var(--brand-primary);
  color: white;
}
.btn--primary:hover {
  background: var(--brand-primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--gold {
  background: linear-gradient(135deg, var(--brand-gold), var(--brand-gold-light));
  color: white;
  border: none;
}
.btn--gold:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(212, 162, 76, 0.4);
  color: white;
}
.btn--outline {
  background: transparent;
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}
.btn--outline:hover {
  background: var(--brand-primary);
  color: white;
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn--ghost:hover {
  background: var(--bg-gray-100);
  color: var(--text-primary);
}
.btn--lg { padding: var(--space-4) var(--space-6); font-size: var(--font-size-md); }
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--font-size-xs); }
.btn--full { width: 100%; }

/* ---- Hero Section ---- */
.hero {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 50%, #0EA5A0 100%);
  color: white;
  padding: var(--space-24) 0 var(--space-20);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 160, 0.25) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -50px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26, 86, 219, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero__content { }
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--brand-gold-light);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-5);
  backdrop-filter: blur(10px);
}
.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: white;
  line-height: 1.2;
  margin-bottom: var(--space-5);
  letter-spacing: -0.02em;
}
.hero__title span {
  background: linear-gradient(135deg, var(--brand-gold-light), var(--brand-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__desc {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: var(--space-8);
  max-width: 560px;
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}
.btn--hero-white {
  background: white;
  color: var(--brand-primary);
  font-weight: 600;
}
.btn--hero-white:hover {
  background: #F1F5F9;
  color: var(--brand-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn--hero-outline {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn--hero-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.6);
}
.hero__stats {
  display: flex;
  gap: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.hero__stat-num {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--brand-gold-light);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.hero__stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

.hero__visual {
  position: relative;
}
.hero__card-stack {
  position: relative;
  height: 420px;
}
.hero__card-float {
  position: absolute;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  color: var(--text-secondary);
}
.hero__card-float--1 {
  top: 0;
  right: 0;
  width: 280px;
}
.hero__card-float--2 {
  top: 120px;
  left: 0;
  width: 260px;
}
.hero__card-float--3 {
  bottom: 0;
  right: 40px;
  width: 240px;
}
.hero__card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: var(--space-3);
}
.hero__card-float--1 .hero__card-icon { background: #DBEAFE; }
.hero__card-float--2 .hero__card-icon { background: #CCFBF1; }
.hero__card-float--3 .hero__card-icon { background: #FEF3C7; }
.hero__card-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.hero__card-desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.6;
}
.hero__card-stat {
  margin-top: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-color-light);
}
.hero__card-stat strong {
  color: var(--brand-primary);
  font-size: var(--font-size-md);
}

/* ---- Product Grid ---- */
.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.product-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8) var(--space-6);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--brand-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}
.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: transparent;
}
.product-card:hover::before {
  transform: scaleX(1);
}
.product-card--gold::before { background: var(--brand-gold); }
.product-card--teal::before { background: var(--brand-secondary); }

.product-card__badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  padding: 4px 12px;
  background: #FEF3C7;
  color: #92400E;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--border-radius-full);
}
.product-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: var(--space-5);
  background: var(--bg-brand-soft);
}
.product-card--gold .product-card__icon { background: #FEF3C7; }
.product-card--teal .product-card__icon { background: #CCFBF1; }

.product-card__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.product-card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--brand-primary);
  font-weight: 500;
  margin-bottom: var(--space-4);
}
.product-card--gold .product-card__subtitle { color: #B45309; }
.product-card--teal .product-card__subtitle { color: #0F766E; }

.product-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}
.product-card__features {
  margin-bottom: var(--space-6);
}
.product-card__features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}
.product-card__features li::before {
  content: '✓';
  color: var(--brand-secondary);
  font-weight: 700;
  flex-shrink: 0;
}
.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--brand-primary);
  transition: gap var(--transition-fast);
}
.product-card__link:hover { gap: var(--space-3); }

/* ---- Why Choose Us ---- */
.advantages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.advantage-item {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
}
.advantage-item:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
}
.advantage-item__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  background: var(--bg-brand-soft);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.advantage-item__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.advantage-item__desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- Cooperation Process ---- */
.process {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  position: relative;
}
.process-step {
  text-align: center;
  position: relative;
}
.process-step__num {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-xl);
  font-weight: 700;
  position: relative;
  z-index: 1;
}
.process-step__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.process-step__desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- Partners / Cases ---- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}
.partner-logo {
  aspect-ratio: 2 / 1;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}
.partner-logo:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.case-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}
.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}
.case-card__cover {
  height: 180px;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: white;
  position: relative;
}
.case-card__tag {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  color: white;
  font-size: 11px;
  border-radius: var(--border-radius-full);
}
.case-card__body {
  padding: var(--space-5);
}
.case-card__city {
  font-size: var(--font-size-sm);
  color: var(--brand-primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
}
.case-card__name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}
.case-card__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color-light);
}
.case-card__stat-num {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--brand-primary);
}
.case-card__stat-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* ---- Testimonials ---- */
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-fast);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
}
.testimonial-card__quote {
  font-size: 32px;
  color: var(--brand-gold);
  margin-bottom: var(--space-3);
  line-height: 1;
  font-family: Georgia, serif;
}
.testimonial-card__text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-5);
}
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color-light);
}
.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-brand-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--brand-primary);
}
.testimonial-card__name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}
.testimonial-card__role {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---- CTA Section ---- */
.cta-banner {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
  border-radius: var(--border-radius-xl);
  padding: var(--space-12) var(--space-10);
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-10);
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(14, 165, 160, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-banner__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}
.cta-banner__desc {
  font-size: var(--font-size-md);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}
.cta-banner__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: flex-end;
  position: relative;
  z-index: 1;
}

/* ---- Footer ---- */
.footer {
  background: #0F172A;
  color: #94A3B8;
  padding: var(--space-16) 0 var(--space-6);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
.footer__brand-desc {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin: var(--space-4) 0;
  max-width: 300px;
  color: #64748B;
}
.footer__contact {
  font-size: var(--font-size-sm);
}
.footer__contact p { margin-bottom: var(--space-2); color: #64748B; }
.footer__contact strong {
  color: var(--brand-gold-light);
  font-size: var(--font-size-xl);
  font-weight: 700;
}
.footer__col-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-5);
}
.footer__links li { margin-bottom: var(--space-3); }
.footer__links a {
  color: #64748B;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}
.footer__links a:hover { color: white; }
.footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: #475569;
}
.footer__bottom-links { display: flex; gap: var(--space-4); }
.footer__bottom-links a { color: #64748B; }

/* ---- Breadcrumb ---- */
.breadcrumb {
  padding: var(--space-4) 0;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color-light);
  background: var(--bg-gray-50);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--brand-primary); }
.breadcrumb__sep { margin: 0 var(--space-2); color: var(--text-disabled); }
.breadcrumb__current { color: var(--text-secondary); }

/* ---- Page Header ---- */
.page-hero {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
  color: white;
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(14, 165, 160, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.page-hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.page-hero__label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--brand-gold-light);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-4);
}
.page-hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: white;
  margin-bottom: var(--space-4);
}
.page-hero__desc {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.75);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---- Product Detail Layout ---- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-10);
  align-items: start;
}
.product-detail__sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-5));
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
}
.product-detail__sidebar h4 {
  font-size: var(--font-size-md);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}
.product-detail__info {
  margin-bottom: var(--space-5);
}
.product-detail__info li {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--border-color-light);
}
.product-detail__info li:last-child { border-bottom: none; }
.product-detail__info span:first-child { color: var(--text-muted); }
.product-detail__info span:last-child { color: var(--text-primary); font-weight: 500; }

.content-block {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}
.content-block__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--bg-brand-soft);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.content-block__title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--brand-primary);
  border-radius: 2px;
}

.feature-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
.feature-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-gray-50);
  border-radius: var(--border-radius-md);
}
.feature-item__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--bg-brand-soft);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.feature-item__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}
.feature-item__desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

.support-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-color-light);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}
.support-list li:last-child { border-bottom: none; }
.support-list li::before {
  content: '✓';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: #ECFDF5;
  color: var(--brand-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  margin-top: 2px;
}

/* ---- Contact Form ---- */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-10);
}
.contact-info-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
}
.contact-info-card__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}
.contact-info-card ul li {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-color-light);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}
.contact-info-card ul li:last-child { border-bottom: none; }
.contact-info-card__icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--bg-brand-soft);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.form-group { margin-bottom: var(--space-4); }
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}
.form-label span { color: var(--danger); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  transition: all var(--transition-fast);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

/* ---- Mobile Menu ---- */
.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 22px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 36px;
    --font-size-4xl: 28px;
    --space-24: 72px;
    --space-20: 60px;
    --space-16: 48px;
  }
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero__visual { order: -1; }
  .hero__card-stack { height: 320px; max-width: 480px; margin: 0 auto; }
  .products { grid-template-columns: 1fr; }
  .advantages { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
  .partner-grid { grid-template-columns: repeat(4, 1fr); }
  .case-grid, .testimonials { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .product-detail { grid-template-columns: 1fr; }
  .product-detail__sidebar { position: static; order: -1; }
  .cta-banner { grid-template-columns: 1fr; text-align: center; }
  .cta-banner__actions { justify-content: center; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --font-size-5xl: 30px;
    --font-size-4xl: 24px;
    --font-size-3xl: 22px;
    --space-20: 48px;
    --space-16: 40px;
    --space-12: 32px;
  }
  .nav { display: none; }
  .header__actions .btn--ghost { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav--mobile-open {
    display: block !important;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: var(--space-4);
    z-index: 99;
    max-height: 80vh;
    overflow-y: auto;
  }
  .nav--mobile-open .nav__list {
    flex-direction: column;
    gap: 0;
  }
  .nav--mobile-open .nav__item {
    width: 100%;
  }
  .nav--mobile-open .nav__link {
    display: block;
    padding: var(--space-3) var(--space-2);
    border-bottom: 1px solid var(--border-color-light);
  }
  .nav--mobile-open .nav__link--active {
    color: var(--brand-primary);
    font-weight: 600;
  }

  .mobile-float-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #1E293B;
    box-shadow: 0 -2px 12px rgba(0,0,0,0.2);
    z-index: 100;
    padding: 8px 12px;
    gap: 8px;
  }
  .mobile-float-bar__btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 40px;
    font-size: 13px;
    font-weight: 600;
    color: #1E293B;
    border: none;
    background: #F1F5F9;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: transform var(--transition-fast);
    text-decoration: none;
  }
  .mobile-float-bar__btn:active { transform: scale(0.95); }
  .mobile-float-bar__btn--call {
    background: #3B82F6;
    color: white;
  }
  .mobile-float-bar__btn--lead {
    background: #FBBF24;
    color: #1E293B;
  }
  @media (max-width: 768px) {
    .mobile-float-bar { display: flex; }
    body { padding-bottom: 54px; }
    .footer__grid { display: none; }
    .footer__bottom { text-align: center; padding: var(--space-4) 0; }
    .footer__bottom-links { justify-content: center; }
  }
  .hero__actions { flex-direction: column; }
  .hero__stats { flex-wrap: wrap; gap: var(--space-5); }
  .advantages { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer__bottom { flex-direction: column; gap: var(--space-3); text-align: center; }
  .feature-grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .content-block { padding: var(--space-5); }
  .hero__card-stack { display: none; }
  .section { padding: var(--space-12) 0; }
  .page-hero { padding: var(--space-8) 0 var(--space-6); }
  .page-hero__title { font-size: var(--font-size-3xl); }
  .page-hero__desc { font-size: var(--font-size-sm); }
  .cta-banner { padding: var(--space-8) var(--space-5); border-radius: var(--border-radius-lg); }
  .cta-banner__title { font-size: var(--font-size-xl); }
  .hero__stat-num { font-size: var(--font-size-2xl); }
  .section__title { font-size: var(--font-size-2xl); }
  .section__subtitle { font-size: var(--font-size-sm); }
  .container { padding: 0 var(--space-4); }
}

/* ---- Filter Chips ---- */
.filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-chip:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}
.filter-chip--active {
  background: var(--brand-primary);
  color: white;
  border-color: var(--brand-primary);
}

/* ---- Pagination ---- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
}
.pagination__btn {
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pagination__btn:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}
.pagination__btn--active {
  background: var(--brand-primary);
  color: white;
  border-color: var(--brand-primary);
}

/* ---- About Page ---- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
.about-intro__text p { color: var(--text-secondary); line-height: 1.8; }
.about-intro__img .about-img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  font-weight: 500;
 overflow: hidden;}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-6);
  text-align: center;
}
.stat-item { }
.stat-item__num {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
  line-height: 1.2;
}
.stat-item__label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
}
.timeline__item {
  position: relative;
  margin-bottom: var(--space-8);
}
.timeline__item::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--bg-white);
  border: 3px solid var(--brand-primary);
  border-radius: 50%;
}
.timeline__year {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: var(--space-2);
}
.timeline__content {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: var(--space-5);
}
.timeline__content h4 {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.timeline__content p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

/* Culture & Honor */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.culture-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: all var(--transition-normal);
}
.culture-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: transparent;
}
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.honor-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}
.honor-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--brand-primary);
}
.honor-card__img {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--bg-gray-100), var(--bg-gray-200));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--text-muted);
 overflow: hidden;}
.honor-card__body {
  padding: var(--space-3) var(--space-4);
  text-align: center;
}
.honor-card__body h4 {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.5;
}
.culture-card__icon, .honor-card__icon {
  font-size: 48px;
  margin-bottom: var(--space-5);
}
.culture-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}
.culture-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.7;
}
.honor-card__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.honor-card__year {
  font-size: var(--font-size-sm);
  color: var(--brand-gold);
  font-weight: 500;
}

/* ---- Contact Page ---- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-10);
  align-items: start;
}
.contact-form {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
}
.contact-form__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.contact-form__desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form__field { margin-bottom: var(--space-4); }
.form__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}
.form__input, .form__select, .form__textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  transition: all var(--transition-fast);
}
.form__input:focus, .form__select:focus, .form__textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}
.form__textarea { resize: vertical; min-height: 100px; }

.contact-info {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
}
.contact-info__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}
.contact-info__item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.contact-info__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--bg-brand-soft);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.contact-info__label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}
.contact-info__value {
  font-size: var(--font-size-md);
  font-weight: 500;
  color: var(--text-primary);
}

/* ---- FAQ ---- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--space-3);
  overflow: hidden;
  transition: all var(--transition-fast);
}
.faq-item:hover {
  border-color: var(--brand-primary);
}
.faq-item__q {
  padding: var(--space-5) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  color: var(--text-primary);
  font-size: var(--font-size-md);
  cursor: pointer;
}
.faq-item__icon {
  font-size: var(--font-size-lg);
  color: var(--brand-primary);
  transition: transform var(--transition-fast);
}
.faq-item__a {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  line-height: 1.8;
  display: none;
}
.faq-item.active .faq-item__a { display: block; }
.faq-item.active .faq-item__icon { transform: rotate(45deg); }

/* ---- Responsive: New Components ---- */
@media (max-width: 1024px) {
  .about-intro { grid-template-columns: 1fr; gap: var(--space-8); }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .culture-grid, .honor-grid { grid-template-columns: 1fr 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
  .stat-item__num { font-size: var(--font-size-3xl); }
  .culture-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .products { grid-template-columns: 1fr !important; }
  .highlights-grid { grid-template-columns: 1fr !important; }
  .timeline { padding-left: 30px; }
  .timeline::before { left: 8px; }
  .timeline__item::before { left: -26px; width: 12px; height: 12px; }
  .contact-form, .contact-info { padding: var(--space-5); }
  .form__row { grid-template-columns: 1fr; }
}