/* ============================================================
   Zheng Hong — Nature / Botanical Design System
   ============================================================ */

/* Custom Properties */
:root {
  --clr-bg: #FAF7F2;
  --clr-primary: #2D6A4F;
  --clr-primary-light: #3A7D5F;
  --clr-secondary: #40916C;
  --clr-secondary-light: #52B788;
  --clr-accent: #D4A373;
  --clr-accent-light: #E0B98A;
  --clr-text: #1B1B1B;
  --clr-text-soft: #3D3D3D;
  --clr-muted: #6B7055;
  --clr-card: #FFFFFF;
  --clr-footer: #2D6A4F;
  --clr-footer-text: #DDE8D0;
  --clr-border: #E0DDD4;
  --clr-input-border: #A8C5A0;
  --clr-input-focus: #2D6A4F;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(45, 106, 79, 0.06);
  --shadow-md: 0 4px 16px rgba(45, 106, 79, 0.08);
  --shadow-lg: 0 8px 32px rgba(45, 106, 79, 0.10);
  --max-width: 1120px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--clr-secondary);
}

ul {
  list-style: none;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--clr-primary);
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
}

.skip-link:focus {
  top: 16px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(45, 106, 79, 0.08);
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 2px 16px rgba(45, 106, 79, 0.08);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--clr-primary);
  text-decoration: none;
}

.logo:hover {
  color: var(--clr-secondary);
}

.logo-text {
  letter-spacing: -0.01em;
}

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

.nav-link {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 500;
  color: var(--clr-text-soft);
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--clr-primary);
  background: rgba(45, 106, 79, 0.06);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 40px) 0 80px;
  overflow: hidden;
}

.hero-bg-shape {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle at 40% 60%, rgba(45, 106, 79, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-muted);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.12;
  color: var(--clr-text);
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.hero-highlight {
  color: var(--clr-primary);
}

.hero-accent-line {
  width: 72px;
  height: 4px;
  background: var(--clr-accent);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--clr-text-soft);
  max-width: 520px;
  margin-bottom: 36px;
}

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

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-leaf-svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary {
  background: var(--clr-primary);
  color: #FFFFFF;
  border-color: var(--clr-primary);
}

.btn-primary:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary-light);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

.btn-outline:hover {
  background: var(--clr-primary);
  color: #FFFFFF;
}

.btn-cta {
  background: #FFFFFF;
  color: var(--clr-primary);
  border-color: #FFFFFF;
  font-size: 17px;
  padding: 16px 40px;
}

.btn-cta:hover {
  background: var(--clr-bg);
  border-color: var(--clr-bg);
  color: var(--clr-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.btn-full {
  width: 100%;
}

/* ============================================================
   Stats
   ============================================================ */
.stats {
  padding: 80px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--clr-text);
  text-align: center;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--clr-muted);
  text-align: center;
  margin-bottom: 48px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat-card {
  position: relative;
  background: var(--clr-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

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

.stat-accent-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--clr-secondary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.stat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: rgba(64, 145, 108, 0.08);
  margin: 0 auto 16px;
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--clr-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat-plus {
  font-size: 28px;
  font-weight: 700;
  color: var(--clr-secondary);
  vertical-align: super;
}

.stat-label {
  margin-top: 8px;
  font-size: 15px;
  color: var(--clr-muted);
  font-weight: 500;
}

/* ============================================================
   Services
   ============================================================ */
.services {
  padding: 80px 0;
  background: rgba(64, 145, 108, 0.03);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--clr-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border-left: 4px solid var(--clr-secondary);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.service-icon-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: rgba(212, 163, 115, 0.15);
  margin-bottom: 20px;
}

.service-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 10px;
}

.service-desc {
  font-size: 15px;
  color: var(--clr-muted);
  line-height: 1.65;
}

/* ============================================================
   Approach
   ============================================================ */
.approach {
  padding: 80px 0;
}

.approach-list {
  max-width: 760px;
  margin: 0 auto;
}

.approach-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 48px;
}

.approach-row.reverse {
  flex-direction: row-reverse;
}

.approach-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--clr-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
}

.approach-card {
  flex: 1;
  background: var(--clr-card);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-sm);
}

.approach-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 8px;
}

.approach-desc {
  font-size: 16px;
  color: var(--clr-muted);
  line-height: 1.7;
}

.approach-shape {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
}

/* ============================================================
   Values
   ============================================================ */
.values {
  padding: 80px 0;
  background: rgba(212, 163, 115, 0.06);
}

.values-triangle {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.value-badge {
  text-align: center;
}

.value-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: var(--clr-secondary);
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.20);
  transition: transform 0.3s ease;
}

.value-badge:hover .value-circle {
  transform: scale(1.08);
}

.value-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 8px;
}

.value-desc {
  font-size: 15px;
  color: var(--clr-muted);
  line-height: 1.65;
  max-width: 260px;
  margin: 0 auto;
}

/* ============================================================
   About / Quote
   ============================================================ */
.about {
  padding: 80px 0;
}

.about-quote-box {
  background: rgba(212, 163, 115, 0.10);
  border-radius: var(--radius-xl);
  padding: 48px;
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}

.quote-mark {
  position: absolute;
  top: 24px;
  left: 28px;
  opacity: 0.5;
}

.about-quote {
  margin-bottom: 28px;
}

.about-quote p {
  font-size: 19px;
  line-height: 1.8;
  color: var(--clr-text-soft);
  font-style: italic;
}

.about-attribution {
  display: flex;
  align-items: center;
  gap: 14px;
}

.about-name {
  font-weight: 700;
  font-size: 16px;
  color: var(--clr-text);
}

.about-role {
  font-size: 14px;
  color: var(--clr-muted);
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  padding: 80px 0;
  background: var(--clr-footer);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 36px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.cta-text {
  font-size: 17px;
  color: #DDE8D0;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ============================================================
   Contact
   ============================================================ */
.contact {
  padding: 80px 0;
}

.contact-card {
  background: var(--clr-card);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-md);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  margin-top: 32px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.contact-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(45, 106, 79, 0.06);
}

.contact-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.contact-value {
  font-size: 16px;
  color: var(--clr-text);
  font-weight: 500;
}

a.contact-value:hover {
  color: var(--clr-primary);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--clr-text-soft);
  margin-bottom: 6px;
}

.form-input {
  padding: 12px 16px;
  border: 2px solid var(--clr-input-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--clr-text);
  background: var(--clr-bg);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

.form-input::placeholder {
  color: #B0AEA4;
}

.form-input:focus {
  border-color: var(--clr-input-focus);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.10);
}

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

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--clr-footer);
  color: var(--clr-footer-text);
  padding: 64px 0 0;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: #FFFFFF;
  text-decoration: none;
  margin-bottom: 12px;
}

.footer-logo:hover {
  color: var(--clr-accent-light);
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.7;
  color: #C0D6B8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-heading {
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 15px;
  color: #C0D6B8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 14px;
  color: #B0C8A8;
}

/* ============================================================
   Animations
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger delays */
.stats-grid .stat-card:nth-child(2) { transition-delay: 0.1s; }
.stats-grid .stat-card:nth-child(3) { transition-delay: 0.2s; }
.services-grid .service-card:nth-child(2) { transition-delay: 0.08s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.16s; }
.services-grid .service-card:nth-child(4) { transition-delay: 0.08s; }
.services-grid .service-card:nth-child(5) { transition-delay: 0.16s; }
.services-grid .service-card:nth-child(6) { transition-delay: 0.24s; }
.approach-row:nth-child(2) { transition-delay: 0.1s; }
.approach-row:nth-child(3) { transition-delay: 0.2s; }
.approach-row:nth-child(4) { transition-delay: 0.3s; }
.values-triangle .value-badge:nth-child(2) { transition-delay: 0.1s; }
.values-triangle .value-badge:nth-child(3) { transition-delay: 0.2s; }

/* ============================================================
   Legal Pages (Privacy / Terms)
   ============================================================ */
.legal-page {
  padding: calc(var(--header-height) + 48px) 0 80px;
}

.legal-card {
  background: var(--clr-card);
  border-radius: var(--radius-xl);
  padding: 48px 56px;
  box-shadow: var(--shadow-sm);
  max-width: 840px;
  margin: 0 auto;
}

.legal-card h1 {
  font-size: 34px;
  font-weight: 800;
  color: var(--clr-text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.legal-card .legal-date {
  font-size: 14px;
  color: var(--clr-muted);
  margin-bottom: 32px;
}

.legal-card h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--clr-primary);
  margin: 36px 0 12px;
}

.legal-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--clr-text-soft);
  margin: 24px 0 8px;
}

.legal-card p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--clr-text-soft);
  margin-bottom: 16px;
}

.legal-card ul,
.legal-card ol {
  margin: 8px 0 16px 20px;
}

.legal-card ul {
  list-style: disc;
}

.legal-card ol {
  list-style: decimal;
}

.legal-card li {
  font-size: 16px;
  line-height: 1.75;
  color: var(--clr-text-soft);
  margin-bottom: 8px;
  padding-left: 4px;
}

.legal-card a {
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--clr-primary);
  margin-bottom: 32px;
  transition: color 0.2s ease;
}

.legal-back:hover {
  color: var(--clr-secondary);
}

.legal-back svg {
  flex-shrink: 0;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-leaf-svg {
    max-width: 280px;
  }

  .hero-title {
    font-size: 40px;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--clr-bg);
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .nav-links.active {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 20px;
    padding: 12px 24px;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 24px);
    padding-bottom: 48px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .values-triangle {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .approach-row,
  .approach-row.reverse {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .approach-shape {
    display: none;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
  }

  .legal-card {
    padding: 32px 24px;
  }

  .contact-card {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .legal-card h1 {
    font-size: 26px;
  }

  .hero-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 24px;
  }

  .about-quote-box {
    padding: 28px 20px;
  }

  .about-quote p {
    font-size: 16px;
  }
}