/* 合本禾 · 品牌色 */
:root {
  --green-900: #0a3d28;
  --green-800: #0f4d32;
  --green-700: #156b44;
  --green-600: #1a7a4e;
  --green-500: #228b57;
  --gold-500: #c9a227;
  --gold-400: #d4b84a;
  --gold-300: #e8d48a;
  --cream: #f7f5ef;
  --white: #ffffff;
  --text: #1a2e24;
  --text-muted: #5a6e64;
  --shadow: 0 12px 40px rgba(10, 61, 40, 0.12);
  --radius: 16px;
  --header-h: 76px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(10, 61, 40, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-text strong {
  font-size: 1.15rem;
  letter-spacing: 0.08em;
}

.brand-text small {
  font-size: 0.68rem;
  opacity: 0.85;
  font-weight: 400;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition);
}

.site-nav a:hover {
  color: var(--gold-400);
}

.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--gold-500);
  border-radius: 999px;
  color: var(--gold-400) !important;
}

.nav-cta:hover {
  background: var(--gold-500);
  color: var(--green-900) !important;
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(10, 61, 40, 0.92) 0%, rgba(21, 107, 68, 0.85) 50%, rgba(10, 61, 40, 0.9) 100%),
    url("https://images.unsplash.com/photo-1416879595882-3373a0480b5b?w=1920&q=80") center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 40%, rgba(201, 162, 39, 0.15), transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--white);
  padding-block: 80px 60px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: 20px;
  padding: 6px 16px;
  border: 1px solid rgba(212, 184, 74, 0.4);
  border-radius: 999px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero-lead {
  font-size: 1.1rem;
  max-width: 560px;
  opacity: 0.92;
  margin-bottom: 36px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-400));
  color: var(--green-900);
  border-color: var(--gold-500);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 162, 39, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.btn-block {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

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

.hero-stats strong {
  display: block;
  font-size: 1.5rem;
  color: var(--gold-400);
  margin-bottom: 4px;
}

.hero-stats span {
  font-size: 0.82rem;
  opacity: 0.85;
}

/* Sections */
.section {
  padding: 100px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 12px;
  font-weight: 600;
}

.section-head h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--green-900);
  margin-bottom: 12px;
  font-weight: 700;
}

.section-head p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* About */
.section-about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-card {
  background: linear-gradient(160deg, var(--green-900), var(--green-700));
  color: var(--white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-card h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: var(--gold-400);
}

.about-card p {
  margin-bottom: 16px;
  opacity: 0.92;
  font-weight: 300;
}

.about-card strong {
  color: var(--gold-300);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.highlight-item {
  padding: 24px 28px;
  background: var(--cream);
  border-radius: var(--radius);
  border-left: 4px solid var(--gold-500);
  transition: var(--transition);
}

.highlight-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}

.highlight-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gold-500);
  letter-spacing: 0.1em;
}

.highlight-item h4 {
  font-size: 1.05rem;
  color: var(--green-800);
  margin: 8px 0 6px;
}

.highlight-item p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.culture-banner {
  margin-top: 48px;
  padding: 48px 40px;
  text-align: center;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.12) 0%, rgba(21, 107, 68, 0.08) 100%);
  border: 2px solid var(--gold-500);
  border-radius: var(--radius);
}

.culture-label {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--green-700);
  font-weight: 600;
  margin-bottom: 20px;
}

.culture-slogan {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  color: var(--green-900);
  line-height: 1.6;
  letter-spacing: 0.06em;
}

.culture-slogan span:not(.culture-sep) {
  display: inline-block;
}

.culture-sep {
  margin: 0 0.15em;
  color: var(--gold-500);
  font-weight: 400;
}

.vision-banner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  margin-top: 32px;
  align-items: center;
  padding: 40px 48px;
  background: linear-gradient(90deg, var(--green-800), var(--green-600));
  border-radius: var(--radius);
  color: var(--white);
  text-align: center;
}

.vision-label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: var(--gold-400);
  margin-bottom: 8px;
}

.vision-banner p {
  font-size: 1.15rem;
  font-weight: 500;
}

.vision-divider {
  width: 1px;
  height: 60px;
  background: rgba(255, 255, 255, 0.3);
}

/* Model */
.section-model {
  background: var(--cream);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.model-card {
  background: var(--white);
  padding: 36px 28px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 4px 20px rgba(10, 61, 40, 0.06);
  transition: var(--transition);
  border: 1px solid transparent;
}

.model-card:hover {
  transform: translateY(-8px);
  border-color: var(--gold-500);
  box-shadow: var(--shadow);
}

.model-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.model-card h3 {
  color: var(--green-800);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.model-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Technology */
.section-tech {
  background: var(--green-900);
  color: var(--white);
}

.section-tech .section-tag {
  color: var(--gold-400);
}

.section-tech .section-head h2,
.section-tech .section-head p {
  color: var(--white);
}

.section-tech .section-head p {
  opacity: 0.8;
}

.tech-layout {
  display: grid;
  gap: 48px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tech-card {
  padding: 32px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  transition: var(--transition);
}

.tech-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--gold-500);
}

.tech-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold-500);
  opacity: 0.6;
  line-height: 1;
  margin-bottom: 12px;
}

.tech-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--gold-300);
}

.tech-card p {
  font-size: 0.92rem;
  opacity: 0.85;
}

.tech-visual {
  text-align: center;
  padding: 40px;
}

.tech-ring {
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
  border: 3px solid var(--gold-500);
  border-radius: 50%;
  position: relative;
  animation: pulse 3s ease-in-out infinite;
}

.tech-ring::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 2px dashed rgba(201, 162, 39, 0.5);
  border-radius: 50%;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.85; }
}

.tech-visual p {
  font-size: 1.2rem;
  letter-spacing: 0.3em;
  color: var(--gold-400);
}

/* Advantages */
.section-advantages {
  background: var(--white);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.advantage-card {
  padding: 32px 24px;
  background: var(--cream);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green-600), var(--gold-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

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

.advantage-card h3 {
  color: var(--green-800);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.product-spotlight {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 48px;
  background: linear-gradient(135deg, var(--green-800) 0%, var(--green-600) 100%);
  border-radius: var(--radius);
  color: var(--white);
}

.product-copy h3 {
  font-size: 1.5rem;
  margin: 12px 0 16px;
  color: var(--gold-300);
}

.product-copy p {
  opacity: 0.9;
  max-width: 560px;
}

.product-badge {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(201, 162, 39, 0.2);
  border: 3px solid var(--gold-500);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.product-badge span {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold-400);
}

.product-badge small {
  font-size: 0.85rem;
  opacity: 0.9;
}

/* Channels */
.section-channels {
  background: var(--cream);
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.channel-card {
  background: var(--white);
  padding: 36px 28px;
  border-radius: var(--radius);
  position: relative;
  transition: var(--transition);
}

.channel-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.channel-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(21, 107, 68, 0.12);
  line-height: 1;
  margin-bottom: 12px;
}

.channel-card h3 {
  color: var(--green-800);
  margin-bottom: 10px;
}

.channel-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Careers */
.section-careers {
  background: var(--white);
}

.careers-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: start;
}

.job-card {
  background: var(--cream);
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid rgba(21, 107, 68, 0.1);
}

.job-card h3 {
  color: var(--green-900);
  font-size: 1.25rem;
  margin-bottom: 24px;
}

.job-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.job-meta li {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.job-meta strong {
  color: var(--green-800);
  margin-right: 8px;
}

.job-desc {
  margin-bottom: 24px;
  color: var(--text);
}

.job-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.job-tags span {
  padding: 6px 14px;
  background: var(--white);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--green-700);
  border: 1px solid rgba(21, 107, 68, 0.2);
}

.career-side h4 {
  color: var(--green-800);
  margin-bottom: 20px;
}

.career-ladder {
  margin-bottom: 28px;
}

.career-ladder li {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(21, 107, 68, 0.15);
  font-size: 0.92rem;
  color: var(--text-muted);
}

.career-ladder li span {
  flex-shrink: 0;
  min-width: 90px;
  font-weight: 600;
  color: var(--gold-500);
}

.benefits {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.benefit-item {
  padding: 16px 20px;
  background: var(--cream);
  border-radius: 12px;
  border-left: 3px solid var(--gold-500);
}

.benefit-item strong {
  display: block;
  color: var(--green-800);
  margin-bottom: 4px;
}

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

.apply-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* Contact */
.section-contact {
  background: linear-gradient(180deg, var(--cream) 0%, #ebe8e0 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-grid h2 {
  font-size: 2rem;
  color: var(--green-900);
  margin: 12px 0 16px;
}

.contact-list {
  margin-top: 28px;
}

.contact-list li {
  padding: 16px 0;
  border-bottom: 1px solid rgba(21, 107, 68, 0.1);
  font-size: 0.95rem;
}

.contact-list strong {
  display: block;
  font-size: 0.78rem;
  color: var(--green-600);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.contact-list a {
  color: var(--green-700);
  font-weight: 500;
}

.contact-list a:hover {
  color: var(--gold-500);
}

.contact-form {
  background: var(--white);
  padding: 36px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-form label {
  display: block;
  margin-bottom: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--green-800);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 8px;
  padding: 12px 16px;
  border: 1px solid #d4ddd8;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--green-600);
}

.form-hint {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* Footer */
.site-footer {
  background: var(--green-900);
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-brand img {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  border-radius: 50%;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}

.footer-nav a:hover {
  color: var(--gold-400);
}

.copyright {
  font-size: 0.82rem;
  opacity: 0.7;
}

/* Back to top */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gold-500);
  color: var(--green-900);
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  z-index: 999;
}

.back-top:hover {
  transform: translateY(-4px);
  background: var(--gold-400);
}

.back-top[hidden] {
  display: none;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
  .model-grid,
  .advantage-grid,
  .channel-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid,
  .careers-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .culture-slogan {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .culture-sep {
    display: none;
  }

  .vision-banner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .vision-divider {
    width: 60px;
    height: 1px;
    margin: 0 auto;
  }

  .product-spotlight {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .product-badge {
    margin: 0 auto;
  }
}

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

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--green-900);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

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

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

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

  .model-grid,
  .advantage-grid,
  .channel-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 480px) {
  .brand-text small {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}