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

:root {
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-primary: #5b8c5a;
  --color-primary-dark: #4a7349;
  --color-primary-light: #e8f2e7;
  --color-accent: #c07a5a;
  --color-accent-light: #fdf3ee;
  --color-text: #3d3630;
  --color-text-muted: #6b625a;
  --color-text-light: #8e857c;
  --color-border: #e8e3dc;
  --color-border-light: #f0ece7;
  --font-heading: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08), 0 3px 8px rgba(0,0,0,0.04);
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul { list-style: none; }

/* ===== Typography ===== */
.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.section-desc {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 48px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

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

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.logo:hover { color: var(--color-primary-dark); }

.site-nav {
  display: flex;
  gap: 32px;
}

.site-nav a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

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

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu-btn.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.open span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ===== Hero ===== */
.hero {
  padding: 160px 0 120px;
  text-align: center;
  background: linear-gradient(175deg, #f2efe8 0%, var(--color-bg) 40%, var(--color-bg) 100%);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

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

/* ===== Values ===== */
.values {
  padding: 80px 0;
}

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

.value-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.value-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.value-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Services ===== */
.services {
  padding: 80px 0;
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  padding: 36px 32px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.service-card > p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.service-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-card li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--color-border-light);
}

/* ===== Modes ===== */
.modes {
  padding: 80px 0;
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 720px;
  margin: 0 auto;
}

.mode-card {
  position: relative;
  text-align: center;
  padding: 48px 32px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

.mode-card:hover {
  box-shadow: var(--shadow-md);
}

.mode-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.mode-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.mode-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.mode-tag {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.mode-tag-secondary {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* ===== About ===== */
.about {
  padding: 80px 0;
  background: var(--color-surface);
}

.about-content {
  max-width: 720px;
  margin: 0 auto;
}

.about .section-title {
  text-align: left;
  margin-bottom: 24px;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-credentials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border-light);
}

.credential {
  text-align: center;
}

.credential strong {
  display: block;
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.credential span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ===== Process ===== */
.process {
  padding: 80px 0;
}

.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}

.step {
  text-align: center;
  flex: 0 1 200px;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.step p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.step-arrow {
  display: flex;
  align-items: flex-start;
  padding-top: 14px;
  color: var(--color-primary-light);
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq {
  padding: 80px 0;
  background: var(--color-surface);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item[open] {
  border-color: var(--color-primary);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::marker { display: none; content: ""; }

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--color-text-light);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ===== Resources ===== */
.resources {
  padding: 80px 0;
}

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

.resource-card {
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}

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

.resource-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.resource-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 12px;
}

.resource-link-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

.resources-note {
  margin-top: 40px;
  padding: 20px 24px;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid #f5e0d3;
}

.resources-note p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.resources-note strong {
  color: var(--color-accent);
}

/* ===== Contact ===== */
.contact {
  padding: 80px 0;
  background: var(--color-surface);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.contact-item h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

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

/* Form */
.contact-form {
  background: var(--color-bg);
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(91, 140, 90, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form .btn {
  width: 100%;
}

/* ===== Footer ===== */
.site-footer {
  background: #3d3630;
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: #fff;
  display: block;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-links h4,
.footer-resources h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links a,
.footer-resources a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 8px;
  transition: color var(--transition);
}

.footer-links a:hover,
.footer-resources a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
}

.footer-crisis {
  color: var(--color-accent);
}

/* ===== Form Feedback ===== */
.form-feedback {
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-feedback.success {
  display: block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.form-feedback.error {
  display: block;
  background: #fdf0ed;
  color: #c0392b;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .values-grid {
    grid-template-columns: 1fr;
    max-width: 380px;
    margin: 0 auto;
  }

  .services-grid {
    grid-template-columns: 1fr;
    max-width: 540px;
    margin: 0 auto;
  }

  .modes-grid {
    grid-template-columns: 1fr;
    max-width: 380px;
  }

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

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

  .about-credentials {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process-steps {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding-top: 0;
  }

  .step {
    flex: none;
    width: 100%;
    max-width: 300px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Mobile nav */
  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(250, 248, 245, 0.98);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border-light);
  }

  .site-nav a:last-child {
    border-bottom: none;
  }

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

@media (max-width: 600px) {
  .section-title {
    font-size: 1.6rem;
  }

  .hero {
    padding: 120px 0 80px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }

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

  .container {
    padding: 0 18px;
  }
}