/* ============================================
   GUHE INTERNATIONAL — Website Design System
   按区块组织，可直接对照 Zoho Sites 设置
   ============================================ */

/* ===== 全局 ===== */
body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  color: #2c2c2c;
  line-height: 1.6;
  background: #fff;
}

/* ===== 颜色变量（参考） =====
   主色深绿:    #1b5e20
   次色中绿:    #2e7d32
   浅绿背景:    #e8f5e9
   浅绿边框:    #a5d6a7
   亮绿强调:    #aed581
   正文深灰:    #2c2c2c
   次级文字:    #444 / #555 / #666
   弱化文字:    #888
   Hero浅绿:    #c8e6c9
   Footer背景:  #145218
*/

/* ===== 导航栏 ===== */
nav {
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  height: 72px;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  color: #1b5e20;
  letter-spacing: 0.5px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: #444;
  text-decoration: none;
}
.nav-links a:hover {
  color: #1b5e20;
}

.nav-cta {
  background: #1b5e20;
  color: #fff;
  padding: 10px 22px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 14px;
}
.nav-cta:hover {
  background: #2e7d32;
}

/* ===== Hero ===== */
.hero {
  background: url('hero_bg.jpg') center/cover no-repeat;
  color: #fff;
  padding: 100px 0;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(27,94,32,0.88) 0%, rgba(46,125,50,0.78) 100%);
}

.hero h1 {
  font-size: 46px;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
}

.hero-tagline {
  font-size: 22px;
  font-weight: 600;
  color: #aed581;
  font-style: italic;
  line-height: 1.4;
}

.hero-sub {
  font-size: 17px;
  color: #c8e6c9;
  line-height: 1.7;
}

.btn-primary {
  background: #fff;
  color: #1b5e20;
  padding: 14px 32px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
}

.btn-outline {
  border: 2px solid #fff;
  color: #fff;
  padding: 12px 30px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}

/* ===== Section 通用 ===== */
.section {
  padding: 72px 0;
}
.section-alt {
  background: #f9faf9;
}

.section-label {
  font-size: 13px;
  font-weight: 700;
  color: #1b5e20;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: #1b5e20;
  margin-bottom: 16px;
}

/* ===== About Us ===== */
.about-text p {
  font-size: 16px;
  color: #444;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-highlight {
  background: #e8f5e9;
  border-left: 4px solid #1b5e20;
  padding: 28px;
  border-radius: 0 8px 8px 0;
}
.about-highlight p {
  font-size: 15px;
  color: #1b5e20;
  font-weight: 600;
  font-style: italic;
  line-height: 1.7;
  margin: 0;
}

/* ===== Who We Serve ===== */
.serve-card {
  background: #fff;
  border: 1px solid #e8f5e9;
  border-radius: 8px;
  padding: 32px;
}

.serve-label {
  font-size: 12px;
  font-weight: 700;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.serve-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: #1b5e20;
  margin-bottom: 12px;
}

.serve-card p {
  font-size: 14px;
  color: #555;
  line-height: 1.7;
  margin-bottom: 12px;
}

.serve-card li {
  font-size: 13px;
  color: #666;
  line-height: 1.5;
  padding: 4px 0 4px 20px;
  list-style: none;
  position: relative;
}
.serve-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #1b5e20;
  font-weight: 700;
}

/* ===== Core Categories ===== */
.product-card {
  background: #fff;
  border: 1px solid #e8f5e9;
  border-radius: 8px;
  overflow: hidden;
}

.product-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1b5e20;
  margin-bottom: 8px;
}

.product-body p {
  font-size: 14px;
  color: #666;
  margin-bottom: 14px;
}

.product-link {
  font-size: 14px;
  font-weight: 600;
  color: #1b5e20;
  text-decoration: none;
}

/* ===== Services ===== */
.service-card {
  background: #fff;
  border: 1px solid #e8f5e9;
  border-radius: 8px;
  text-align: center;
  overflow: hidden;
}

.service-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1b5e20;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 13px;
  color: #666;
  line-height: 1.6;
  padding: 0 12px;
}

/* ===== How We Work ===== */
.step-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #1b5e20;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  margin: 0 auto 16px;
}

.step h4 {
  font-size: 16px;
  font-weight: 700;
  color: #1b5e20;
  margin-bottom: 8px;
}

.step p {
  font-size: 13px;
  color: #666;
}

/* ===== Newsletter ===== */
.newsletter {
  background: linear-gradient(135deg, #1b5e20 0%, #2e7d32 100%);
  color: #fff;
  padding: 64px 0;
}

.newsletter .section-label {
  color: #aed581;
}

.newsletter-left h2 {
  font-size: 28px;
  color: #fff;
  margin-bottom: 16px;
}

.newsletter-left p {
  font-size: 16px;
  color: #c8e6c9;
  line-height: 1.7;
  margin-bottom: 24px;
}

.newsletter-form input {
  padding: 14px 18px;
  border: none;
  border-radius: 4px;
  font-size: 15px;
  font-family: inherit;
}

.newsletter-form button {
  background: #aed581;
  color: #1b5e20;
  border: none;
  padding: 14px 28px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.report-preview {
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 16px;
}

.report-info h4 {
  font-size: 14px;
  color: #fff;
  margin-bottom: 4px;
}

.report-info p {
  font-size: 12px;
  color: #c8e6c9;
  margin: 0;
}

/* ===== Contact ===== */
.contact-form {
  background: #fff;
  border: 1px solid #e8f5e9;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: #444;
  margin-bottom: 6px;
  display: block;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #1b5e20;
}

.form-submit {
  width: 100%;
  background: #1b5e20;
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.form-submit:hover {
  background: #2e7d32;
}

/* ===== Footer ===== */
footer {
  background: #145218;
  color: #c8e6c9;
  padding: 48px 0 24px;
}

.footer-brand h3 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.7;
  color: #c8e6c9;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: #aed581;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.footer-col a {
  color: #c8e6c9;
  text-decoration: none;
  font-size: 13px;
}
.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #2e7d32;
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
  color: #81c784;
}