/* ===== RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --navy: #0A1E3F;       /* 深海蓝 - 主色 */
  --navy-dark: #06132A;  /* 更深的蓝 - 页脚 */
  --green: #4A9B3F;      /* 品牌绿 - 点缀色 */
  --green-dark: #3A7D31;
  --gray: #8A939E;
  --light: #F5F6F8;
  --white: #FFFFFF;
  --border: #E3E6EA;
  --text-dark: #0E1116;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(10,30,63,0.04);
}

.header-inner {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-img {
  height: 44px;
  width: auto;
}

.nav {
  display: flex;
  gap: 36px;
}

.nav a {
  color: var(--navy);
  font-weight: 600;
  font-size: 15px;
  transition: color 0.2s;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-align: center;
}

.btn-small { padding: 10px 22px; font-size: 14px; }

.btn-primary { 
  background: var(--green); 
  color: var(--white); 
}
.btn-primary:hover { 
  background: var(--green-dark); 
  transform: translateY(-2px); 
  box-shadow: 0 8px 20px rgba(74,155,63,0.3);
}

.btn-outline { 
  background: transparent; 
  color: var(--navy); 
  border: 2px solid var(--navy); 
}
.btn-outline:hover { 
  background: var(--navy); 
  color: var(--white); 
}

.btn-ghost { 
  background: transparent; 
  color: var(--white); 
  border: 2px solid rgba(255,255,255,0.5); 
}
.btn-ghost:hover { 
  border-color: var(--green); 
  color: var(--green); 
}

.btn-full { width: 100%; }

/* ===== HERO ===== */
.hero {
  background:
    linear-gradient(120deg, rgba(6,19,42,0.95) 0%, rgba(10,30,63,0.85) 50%, rgba(6,19,42,0.95) 100%),
    radial-gradient(circle at 80% 20%, #1a3560 0%, #06132A 70%);
  padding: 140px 0 120px;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -100px;
  bottom: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(74,155,63,0.18) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content { position: relative; z-index: 1; max-width: 780px; }

.hero-tag {
  color: var(--green);
  font-weight: 700;
  letter-spacing: 3px;
  font-size: 13px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 64px;
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -1px;
  margin-bottom: 18px;
}

.hero-slogan {
  font-size: 18px;
  color: var(--green);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 28px;
  font-style: italic;
}

.hero-sub {
  font-size: 19px;
  color: rgba(255,255,255,0.78);
  max-width: 620px;
  margin-bottom: 44px;
}

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

/* ===== STATS ===== */
.stats {
  background: var(--green);
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 32px;
  font-weight: 900;
  color: var(--white);
}

.stat span {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
}

/* ===== SECTIONS ===== */
.section { padding: 110px 0; }
.section-dark { background: var(--navy); color: var(--white); }

.section-tag {
  color: var(--green);
  font-weight: 700;
  letter-spacing: 3px;
  font-size: 13px;
  margin-bottom: 16px;
}

.section-tag.light { color: var(--green); }

.section h2 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
  color: var(--navy);
}

h2.light { color: var(--white); }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 70px;
}

.section-sub {
  font-size: 18px;
  color: #555;
}

.section-sub.light { color: rgba(255,255,255,0.7); }

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 70px;
  align-items: center;
}

.about-grid p {
  font-size: 17px;
  color: #444;
  margin-bottom: 20px;
}

.brand-quote {
  font-style: italic;
  color: var(--green) !important;
  font-weight: 600;
  border-left: 4px solid var(--green);
  padding-left: 18px;
  margin: 24px 0 !important;
}

.about-grid .btn { margin-top: 16px; }

.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
  height: 420px;
}

.visual-block { border-radius: 10px; }

.visual-block.navy { background: var(--navy); grid-row: span 2; }
.visual-block.green { background: var(--green); }
.visual-block.gray { background: var(--gray); }

/* ===== PRODUCTS ===== */
.division { margin-bottom: 80px; }
.division:last-child { margin-bottom: 0; }

.division-head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.division-index {
  font-size: 40px;
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}

.division-head h3 {
  font-size: 30px;
  font-weight: 800;
  color: var(--white);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.card {
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
  transition: transform 0.25s, border-color 0.25s;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--green);
}

.card-img {
  height: 220px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,30,63,0.9) 100%);
}

/* 产品图片占位 —— 可替换为真实图片 */
.card-img.tractor {
  background: linear-gradient(135deg, #0A1E3F 0%, #4A9B3F 100%);
}
.card-img.implements {
  background: linear-gradient(135deg, #4A9B3F 0%, #8A939E 100%);
}
.card-img.forklift {
  background: linear-gradient(135deg, #0A1E3F 0%, #4A5A6E 100%);
}
.card-img.mixer {
  background: linear-gradient(135deg, #06132A 0%, #4A9B3F 100%);
}

.card-body { padding: 30px; }

.card-body h4 {
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}

.card-body p {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  margin-bottom: 18px;
}

.spec-list { list-style: none; }

.spec-list li {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  padding: 8px 0 8px 22px;
  position: relative;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.spec-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 2px;
}

/* ===== WHY US ===== */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature {
  padding: 36px 28px;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.25s;
}

.feature:hover {
  border-color: var(--green);
  box-shadow: 0 20px 40px rgba(10,30,63,0.08);
}

.feature-icon {
  font-size: 14px;
  font-weight: 800;
  color: var(--white);
  background: var(--navy);
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.feature h4 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--navy);
}

.feature p { color: #666; font-size: 15px; }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: start;
}

.contact-info { margin-top: 36px; }

.contact-info p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 22px;
  font-size: 16px;
}

.contact-info strong {
  color: var(--green);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}

.contact-form {
  background: rgba(255,255,255,0.05);
  padding: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 14px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(255,255,255,0.4); }

.contact-form select option { color: var(--text-dark); }

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus { border-color: var(--green); }

.form-note {
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 14px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 30px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo { margin-bottom: 14px; }

.footer-logo .logo-img {
  height: 40px;
  background: var(--white);
  padding: 6px 10px;
  border-radius: 6px;
}

.footer-desc { font-size: 15px; max-width: 340px; line-height: 1.7; }

.footer-links {
  display: flex;
  gap: 30px;
}

.footer-links a {
  color: rgba(255,255,255,0.75);
  font-size: 15px;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--green); }

.footer-bottom {
  padding-top: 24px;
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,0.4);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
  .hero h1 { font-size: 44px; }
  .hero-slogan { font-size: 16px; }
  .section h2 { font-size: 34px; }
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .card-grid { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .about-visual { height: 300px; }
  .nav { display: none; }
  .header-inner { height: 70px; }
  .logo-img { height: 38px; }
}

@media (max-width: 560px) {
  .hero { padding: 100px 0 80px; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .section { padding: 70px 0; }
  .features { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .division-head h3 { font-size: 22px; }
  .contact-form { padding: 26px; }
}