/* 童元元官网 — 自然温暖 + 专业可信 */
:root {
  --color-bg: #faf8f4;
  --color-bg-alt: #f0f5f0;
  --color-surface: #ffffff;
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #40916c;
  --color-accent: #e07a3a;
  --color-accent-soft: #fff4eb;
  --color-text: #1a2e1f;
  --color-text-muted: #5c6b5f;
  --color-border: #dde8dd;
  --font: "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(45, 106, 79, 0.08);
  --shadow-lg: 0 12px 48px rgba(45, 106, 79, 0.12);
  --header-h: 72px;
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--color-primary-light);
}

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.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);
}

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

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

.btn-block {
  width: 100%;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(250, 248, 244, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.15rem;
}

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

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: 10px;
  font-size: 1.1rem;
}

.logo-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.site-nav a:hover {
  color: var(--color-primary);
}

.header-cta {
  flex-shrink: 0;
}

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 3rem) 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(64, 145, 108, 0.15), transparent),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(224, 122, 58, 0.1), transparent),
    linear-gradient(180deg, #f5faf6 0%, var(--color-bg) 100%);
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(transparent, var(--color-bg));
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.35rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(45, 106, 79, 0.1);
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary-dark);
}

.hero h1 span {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.75em;
  font-weight: 600;
  color: var(--color-accent);
}

.hero-lead {
  max-width: 640px;
  margin: 0 0 2rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 0;
  padding: 1.5rem 0 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.hero-stats li {
  text-align: left;
}

.hero-stats strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Sections */
.section {
  padding: 5rem 0;
}

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

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header.align-left {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.section-tag {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-header h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.section-header p {
  margin: 0;
  color: var(--color-text-muted);
}

.subsection-title {
  margin: 3rem 0 1.5rem;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}

/* Cards grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  color: var(--color-primary-dark);
}

.card p {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.card-meta {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-primary);
}

.card-meta li {
  padding: 0.25rem 0;
}

.card-accent {
  background: linear-gradient(145deg, var(--color-primary-dark), var(--color-primary));
  border: none;
  color: #fff;
}

.card-accent h3,
.card-accent p,
.card-highlight {
  color: #fff;
}

.card-accent .card-meta {
  color: rgba(255, 255, 255, 0.9);
}

.card-highlight {
  margin: 0;
  font-weight: 600;
  font-size: 0.95rem;
}

/* Myths */
.myth-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.myth-item {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.myth-x {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fee2e2;
  color: #b91c1c;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
}

.myth-item strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--color-primary-dark);
}

.myth-item p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.root-card {
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow);
}

.root-card h4 {
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}

.root-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* Dimensions */
.dimensions {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.dimension {
  position: relative;
  padding: 1.75rem 2rem 1.75rem 5rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}

.dimension:hover {
  border-color: var(--color-primary-light);
}

.dim-num {
  position: absolute;
  left: 1.5rem;
  top: 1.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.4;
}

.dim-badge {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border-radius: 999px;
}

.dimension-featured {
  background: linear-gradient(135deg, #f0f9f4 0%, #fff 50%);
  border-color: var(--color-primary-light);
}

.dimension h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  color: var(--color-primary-dark);
}

.dimension > p {
  margin: 0 0 0.75rem;
  color: var(--color-text-muted);
}

.dimension ul {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.dimension li {
  margin: 0.25rem 0;
}

/* Compare table */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.95rem;
}

.compare-table th,
.compare-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.compare-table th {
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 600;
}

.compare-table th.col-brand {
  background: var(--color-primary);
}

.compare-table td.col-brand {
  background: rgba(45, 106, 79, 0.06);
  color: var(--color-primary-dark);
  font-weight: 500;
}

.compare-table tbody tr:hover td {
  background: rgba(45, 106, 79, 0.03);
}

.compare-table tbody tr:hover td.col-brand {
  background: rgba(45, 106, 79, 0.1);
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.team-card {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  transition: transform var(--transition);
}

.team-card:hover {
  transform: translateY(-4px);
}

.team-avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 50%;
}

.team-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  color: var(--color-primary-dark);
}

.team-role {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
}

.team-card > p:last-child {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: left;
}

/* Results */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.result-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
  border: 1px solid var(--color-border);
}

.result-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.result-label {
  margin-top: 0.5rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.result-time {
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Cases */
.cases-slider {
  position: relative;
  min-height: 180px;
}

.case-card {
  display: none;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.case-card.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.case-tag {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(45, 106, 79, 0.1);
  border-radius: 999px;
}

.case-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
  color: var(--color-primary-dark);
}

.case-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.case-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.case-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.case-dot.active {
  background: var(--color-primary);
  transform: scale(1.2);
}

/* Contact */
.cta-section {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.contact-form {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.contact-form h3 {
  margin: 0 0 1.5rem;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}

.contact-form label {
  display: block;
  margin-bottom: 1rem;
}

.contact-form label span {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-note {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}

.form-success {
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  background: rgba(45, 106, 79, 0.12);
  border-radius: var(--radius);
}

.form-error {
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: #b91c1c;
  background: #fee2e2;
  border-radius: var(--radius);
}

#form-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Footer */
.site-footer {
  padding: 3rem 0 2rem;
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
}

.footer-brand .logo-mark {
  margin-bottom: 0.75rem;
}

.footer-brand p {
  margin: 0;
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-left: auto;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-copy {
  width: 100%;
  margin: 2rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 960px) {
  .grid-3,
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .header-cta {
    display: none;
  }

  .grid-3,
  .grid-2,
  .myth-grid,
  .team-grid,
  .results-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .dimension {
    padding: 1.5rem 1.25rem 1.5rem 1.25rem;
  }

  .dim-num {
    position: static;
    display: block;
    margin-bottom: 0.5rem;
  }

  .dim-badge {
    position: static;
    display: inline-block;
    margin-bottom: 0.5rem;
  }

  .footer-nav {
    margin-left: 0;
  }
}