/* ============================================================
   Standata Design System — "Precision Healthcare"
   医疗数据治理 · 精确 · 可信 · 专业
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Brand Colors */
  --color-primary: #1a3c2a;
  --color-primary-light: #234d36;
  --color-primary-lighter: #2d6144;
  --color-accent: #0d9488;
  --color-accent-light: #14b8a6;
  --color-highlight: #059669;
  --color-gold: #b8860b;
  --color-gold-light: #d4a843;

  /* Surfaces */
  --color-bg: #f9faf7;
  --color-bg-white: #FFFFFF;
  --color-bg-warm: #f2f5f0;
  --color-bg-dark: #1a3c2a;
  --color-bg-card: #FFFFFF;
  --color-bg-hover: #ecf5ef;

  /* Text */
  --color-text: #1a3c2a;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;
  --color-text-light: #CBD5E1;
  --color-text-on-dark: #F1F5F9;
  --color-text-on-dark-muted: #94A3B8;

  /* Borders */
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-border-hover: #CBD5E1;

  /* Status */
  --color-success: #16A34A;
  --color-warning: #D97706;
  --color-error: #DC2626;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 60, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 60, 42, 0.06);
  --shadow-lg: 0 8px 30px rgba(26, 60, 42, 0.08);
  --shadow-xl: 0 20px 60px rgba(26, 60, 42, 0.10);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Consolas', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

a {
  color: var(--color-highlight);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
}

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

.container--narrow {
  max-width: 800px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nav__logo-img {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

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

.nav__logo-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.nav__logo-subtitle {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  font-weight: 800;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav__link {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary);
}

.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-highlight);
  border-radius: 1px;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.5rem;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.nav__cta:hover {
  background: var(--color-primary-light);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: all 0.3s ease;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

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

.btn--accent:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border-hover);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-hover);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 0.5rem 1rem;
}

.btn--ghost:hover {
  color: var(--color-primary);
  background: var(--color-bg-hover);
}

.btn--large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn--small {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn__icon {
  font-size: 1.2em;
}

/* --- Hero Section --- */
.hero {
  padding: calc(var(--nav-height) + var(--spacing-5xl)) 0 var(--spacing-5xl);
  background: linear-gradient(170deg, var(--color-bg) 0%, var(--color-bg-warm) 50%, rgba(13, 148, 136, 0.04) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(13, 148, 136, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(184, 134, 11, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero__content {
  max-width: 700px;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.375rem 1rem;
  background: rgba(26, 127, 140, 0.08);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xl);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  margin-bottom: var(--spacing-lg);
  line-height: 1.15;
}

.hero__title-highlight {
  background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
  max-width: 560px;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-4xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--color-border);
}

.hero__stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.hero__stat-label {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

/* --- Section --- */
.section {
  padding: var(--spacing-5xl) 0;
}

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

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.section--dark h2,
.section--dark h3 {
  color: white;
}

.section--dark p {
  color: var(--color-text-on-dark-muted);
}

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-4xl);
}

.section__label {
  display: inline-block;
  font-size: 0.813rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.section__title {
  margin-bottom: var(--spacing-md);
}

.section__desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* --- Cards --- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-2xl);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.card--featured {
  border-color: var(--color-accent);
  border-width: 1.5px;
  box-shadow: var(--shadow-md);
}

.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: var(--spacing-lg);
}

.card__icon--blue {
  background: rgba(5, 150, 105, 0.1);
  color: var(--color-highlight);
}

.card__icon--teal {
  background: rgba(26, 127, 140, 0.1);
  color: var(--color-accent);
}

.card__icon--gold {
  background: rgba(196, 148, 58, 0.1);
  color: var(--color-gold);
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.card__desc {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
}

/* --- Grid --- */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* --- Tag / Badge --- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.813rem;
  font-weight: 500;
}

.tag--teal {
  background: rgba(26, 127, 140, 0.08);
  color: var(--color-accent);
}

.tag--blue {
  background: rgba(5, 150, 105, 0.08);
  color: var(--color-highlight);
}

.tag--gold {
  background: rgba(196, 148, 58, 0.08);
  color: var(--color-gold);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
  text-align: center;
}

.stat__number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.stat__number--accent {
  color: var(--color-accent);
}

.stat__number--gold {
  color: var(--color-gold);
}

.stat__label {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

/* --- Case Cards --- */
.case-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.case-card__header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.case-card__logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
}

.case-card__client {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.case-card__region {
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

.case-card__body {
  padding: var(--spacing-lg) var(--spacing-xl);
}

.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.case-card__footer {
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-bg-warm);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* --- Contact Form --- */
.form {
  display: grid;
  gap: var(--spacing-lg);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.form__input,
.form__textarea,
.form__select {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-text);
  background: white;
  transition: all 0.2s ease;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-highlight);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.form__textarea {
  min-height: 120px;
  resize: vertical;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-muted);
}

/* --- Trust Bar / Logo Strip --- */
.trust-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-3xl);
  flex-wrap: wrap;
  padding: var(--spacing-2xl) 0;
}

.trust-bar__logo {
  height: 32px;
  opacity: 0.4;
  filter: grayscale(100%);
  transition: all 0.3s ease;
}

.trust-bar__logo:hover {
  opacity: 0.7;
  filter: grayscale(0%);
}

/* --- Testimonial --- */
.testimonial {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-2xl);
}

.testimonial__quote {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.8;
  position: relative;
  padding-left: var(--spacing-xl);
  border-left: 3px solid var(--color-accent);
}

.testimonial__author {
  margin-top: var(--spacing-lg);
  font-weight: 600;
  color: var(--color-primary);
}

.testimonial__role {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* --- Page Banner --- */
.page-banner {
  padding: calc(var(--nav-height) + var(--spacing-4xl)) 0 var(--spacing-3xl);
  background: linear-gradient(170deg, var(--color-bg) 0%, var(--color-bg-warm) 100%);
  text-align: center;
}

.page-banner__title {
  margin-bottom: var(--spacing-md);
}

.page-banner__desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  justify-content: center;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

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

.breadcrumb__sep {
  color: var(--color-border-hover);
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: var(--spacing-5xl) 0 var(--spacing-2xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-4xl);
}

.footer__brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer__desc {
  color: var(--color-text-on-dark-muted);
  font-size: 0.938rem;
  line-height: 1.8;
}

.footer__heading {
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-lg);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__link {
  color: var(--color-text-on-dark-muted);
  font-size: 0.938rem;
  transition: color 0.2s ease;
}

.footer__link:hover {
  color: white;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-on-dark-muted);
}

.footer__icp {
  text-align: center;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-on-dark-muted);
}

.footer__icp a {
  color: var(--color-text-on-dark-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__icp a:hover {
  color: var(--color-text-on-dark);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--spacing-3xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--spacing-2xl);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-3xl) + 4px);
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
}

.timeline__year {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.timeline__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline__desc {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
}

/* --- Accordion --- */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__item {
  border-bottom: 1px solid var(--color-border-light);
}

.accordion__item:last-child {
  border-bottom: none;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: var(--color-bg-card);
  border: none;
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: 1.063rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: background 0.2s ease;
}

.accordion__trigger:hover {
  background: var(--color-bg-hover);
}

.accordion__icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: var(--color-text-muted);
}

.accordion__item.active .accordion__icon {
  transform: rotate(45deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.accordion__item.active .accordion__content {
  max-height: 500px;
}

.accordion__body {
  padding: 0 var(--spacing-xl) var(--spacing-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* --- Knowledge Cards --- */
.knowledge-card {
  display: flex;
  gap: var(--spacing-xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-2xl);
  transition: all 0.3s ease;
}

.knowledge-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-hover);
}

.knowledge-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.knowledge-card__content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

.knowledge-card__content p {
  font-size: 0.938rem;
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: white;
  display: none;
  flex-direction: column;
  padding: var(--spacing-xl);
  z-index: 999;
  overflow-y: auto;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.mobile-menu__link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background 0.2s ease;
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
  background: var(--color-bg-hover);
  color: var(--color-highlight);
}

.mobile-menu__cta {
  margin-top: var(--spacing-xl);
  display: flex;
  justify-content: center;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  opacity: 0;
}

.animate-in.visible {
  animation: fadeInUp 0.6s ease forwards;
}

/* --- Two Column Layout --- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.split__image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* --- Feature List --- */
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.feature-list__item {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.feature-list__icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(26, 127, 140, 0.1);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 3px;
}

.feature-list__text {
  font-size: 1.063rem;
  color: var(--color-text-secondary);
}

.feature-list__text strong {
  color: var(--color-text);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__mobile-toggle { display: flex; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .knowledge-card { flex-direction: column; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { justify-content: center; }

  .section { padding: var(--spacing-4xl) 0; }
  .section__header { margin-bottom: var(--spacing-2xl); }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 1rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
    --spacing-4xl: 3rem;
    --spacing-5xl: 4rem;
  }

  .stats-bar { grid-template-columns: 1fr; }
  .trust-bar { gap: var(--spacing-xl); }
  .footer__bottom { flex-direction: column; gap: var(--spacing-md); text-align: center; }
}