/* ============================================================
   华昇云农服 H5官网 — 主样式系统
   品牌色: #2E7D32  辅助: #43A047 #1B5E20
   ============================================================ */

/* --- CSS 变量 --- */
:root {
  --green-900: #1B5E20;
  --green-700: #2E7D32;
  --green-500: #43A047;
  --green-300: #81C784;
  --green-100: #C8E6C9;
  --green-50:  #E8F5E9;
  --gold:      #F9A825;
  --gold-light:#FFF8E1;
  --gray-900:  #212121;
  --gray-700:  #616161;
  --gray-600:  #757575;
  --gray-400:  #BDBDBD;
  --gray-100:  #F5F5F5;
  --white:     #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1200px;
  --header-h:   64px;
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);color:var(--gray-900);line-height:1.7;background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-700);text-decoration:none;transition:color .2s}
a:hover{color:var(--green-900)}
ul{list-style:none}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

/* --- 顶部导航 --- */
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--green-100);height:var(--header-h)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--green-900)}
.nav-brand .brand-icon{font-size:28px}
.nav-links{display:flex;gap:32px}
.nav-links a{color:var(--gray-700);font-size:15px;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--green-700);border-bottom-color:var(--green-500)}
.nav-actions{display:flex;align-items:center;gap:12px}
.hamburger{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--gray-900)}

/* --- 按钮 --- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all .2s;text-align:center}
.btn-primary{background:var(--green-700);color:var(--white)}
.btn-primary:hover{background:var(--green-900);color:var(--white)}
.btn-outline{border:2px solid var(--green-700);color:var(--green-700);background:transparent}
.btn-outline:hover{background:var(--green-700);color:var(--white)}
.btn-gold{background:var(--gold);color:var(--gray-900)}
.btn-gold:hover{background:#F57F17}
.btn-lg{padding:14px 36px;font-size:17px;border-radius:var(--radius-md)}
.btn-sm{padding:6px 16px;font-size:13px}

/* --- Hero 区 --- */
.hero{position:relative;padding:100px 0 80px;background:linear-gradient(135deg, var(--green-50) 0%, var(--white) 50%, var(--gold-light) 100%);overflow:hidden}
.hero::before{content:"";position:absolute;top:-60px;right:-60px;width:300px;height:300px;background:var(--green-100);border-radius:50%;opacity:.5}
.hero::after{content:"";position:absolute;bottom:-40px;left:-40px;width:200px;height:200px;background:var(--gold-light);border-radius:50%;opacity:.4}
.hero .container{position:relative;z-index:1;text-align:center}
.hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;color:var(--green-900);line-height:1.25;margin-bottom:16px}
.hero h1 span{color:var(--green-700)}
.hero p{font-size:clamp(16px,2.5vw,19px);color:var(--gray-700);max-width:640px;margin:0 auto 32px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:48px;justify-content:center;margin-top:48px;flex-wrap:wrap}
.hero-stats .stat{text-align:center}
.hero-stats .stat-num{font-size:36px;font-weight:800;color:var(--green-700)}
.hero-stats .stat-label{font-size:14px;color:var(--gray-700);margin-top:4px}

/* --- 通用 section --- */
.section{padding:80px 0}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:clamp(24px,4vw,36px);font-weight:800;color:var(--green-900);margin-bottom:12px}
.section-header p{font-size:16px;color:var(--gray-700);max-width:600px;margin:0 auto}
.section-bg{background:var(--green-50)}

/* --- 卡片 --- */
.card{background:var(--white);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.card-body{padding:24px}
.card-icon{font-size:40px;margin-bottom:12px}
.card h3{font-size:18px;font-weight:700;color:var(--gray-900);margin-bottom:8px}
.card p{font-size:14px;color:var(--gray-700);line-height:1.6}

/* --- 网格 --- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}

/* --- 服务入口卡片 --- */
.service-card{text-align:center;padding:40px 24px}
.service-card .card-icon{font-size:48px}

/* --- 产品卡片 --- */
.product-card .product-img{height:220px;background:var(--green-50);display:flex;align-items:center;justify-content:center;font-size:64px}
.product-card .product-tag{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:600;background:var(--green-100);color:var(--green-700);margin-bottom:8px}

/* --- 作物分类标签 --- */
.crop-tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:32px}
.crop-tab{padding:8px 20px;border-radius:24px;font-size:14px;font-weight:500;cursor:pointer;border:1px solid var(--green-300);background:var(--white);color:var(--green-700);transition:all .2s}
.crop-tab:hover,.crop-tab.active{background:var(--green-700);color:var(--white);border-color:var(--green-700)}

/* --- FAQ 区 --- */
.faq-item{border-bottom:1px solid var(--green-100);padding:20px 0}
.faq-q{font-size:17px;font-weight:700;color:var(--gray-900);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q::after{content:"▾";font-size:14px;color:var(--green-500);transition:transform .3s}
.faq-q.open::after{transform:rotate(180deg)}
.faq-a{font-size:15px;color:var(--gray-700);line-height:1.8;padding-top:12px;display:none}
.faq-a.show{display:block}

/* --- 经销商入口页 --- */
.dealer-entry{text-align:center;padding:120px 0}
.dealer-entry .big-icon{font-size:80px;margin-bottom:24px}
.dealer-entry h1{font-size:clamp(28px,4vw,40px);color:var(--green-900);margin-bottom:12px}
.dealer-entry .dealer-link{display:inline-block;margin-top:24px;padding:16px 48px;background:var(--green-700);color:var(--white);border-radius:var(--radius-md);font-size:18px;font-weight:700;transition:background .2s}
.dealer-entry .dealer-link:hover{background:var(--green-900);color:var(--white)}

/* --- 转化入口（每页底部） --- */
.cta-section{background:linear-gradient(135deg, var(--green-900), var(--green-700));color:var(--white);text-align:center;padding:64px 20px;border-radius:var(--radius-lg);margin:60px auto 20px;max-width:var(--max-width)}
.cta-section h3{font-size:24px;font-weight:800;margin-bottom:8px}
.cta-section p{font-size:15px;opacity:.85;margin-bottom:24px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-section .cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-section .btn-outline{border-color:var(--white);color:var(--white)}
.cta-section .btn-outline:hover{background:var(--white);color:var(--green-900)}
.cta-qr{width:120px;height:120px;background:var(--white);border-radius:var(--radius-sm);margin:16px auto;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--gray-700)}

/* --- 关于我们 --- */
.about-hero{text-align:center;padding:80px 0 40px;background:var(--green-50)}
.about-hero h1{font-size:clamp(28px,4vw,40px);color:var(--green-900)}
.about-content{max-width:800px;margin:0 auto;padding:40px 20px}
.about-content p{font-size:16px;color:var(--gray-700);margin-bottom:20px;line-height:1.9}
.about-values{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.about-values .value-item{text-align:center;padding:24px}
.about-values .value-icon{font-size:48px;margin-bottom:12px}
.about-hero-subtitle{font-size:17px;color:var(--gray-700);max-width:640px;margin:12px auto 0}
.about-card-title{font-size:16px;color:var(--gray-900);font-weight:700;margin-bottom:10px}
.about-card-copy{font-size:14px;color:var(--gray-700)}
.about-card-caption{font-size:12px;color:var(--gray-600)}
.about-callout-panel{margin-top:28px;padding:24px;border-radius:14px;background:var(--green-50)}
.about-callout-title{font-size:20px;color:var(--green-900);margin-bottom:10px}
.about-panel{margin-top:32px;padding:32px;background:var(--green-50);border-radius:var(--radius-lg);text-align:center}
.about-chip-row{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;font-size:16px;font-weight:600;color:var(--green-700)}
.about-chip{background:var(--white);padding:10px 24px;border-radius:24px;box-shadow:var(--shadow-sm)}
.about-contact-panel{margin-top:60px;padding:40px;background:var(--green-50);border-radius:var(--radius-lg);text-align:center}
.about-section-title{font-size:24px;color:var(--green-900);margin-bottom:12px}
.about-contact-subtitle{color:var(--gray-700);margin-bottom:24px}
.about-contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;text-align:left;max-width:700px;margin:0 auto}
.about-contact-label{color:var(--green-700)}
.about-contact-value{font-size:14px;color:var(--gray-700)}
.about-values-2{grid-template-columns:repeat(2,1fr)}
.about-values-3{grid-template-columns:repeat(3,1fr)}
.about-values-4{grid-template-columns:repeat(4,1fr)}
.section-offset-md{margin-top:24px}
.section-offset-lg{margin-top:40px}

/* --- 面包屑 --- */
.breadcrumb{padding:16px 0;font-size:13px;color:var(--gray-400)}
.breadcrumb a{color:var(--gray-700)}
.breadcrumb span{color:var(--gray-400)}

/* --- Footer --- */
.footer{background:var(--gray-900);color:var(--gray-400);padding:48px 0 24px;margin-top:0}
.footer .container{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer h4{color:var(--white);font-size:16px;margin-bottom:16px}
.footer a{color:var(--gray-400);font-size:14px;display:block;margin-bottom:8px}
.footer a:hover{color:var(--green-300)}
.footer-brand{font-size:20px;font-weight:700;color:var(--white);margin-bottom:12px}
.footer-bottom{text-align:center;padding-top:24px;margin-top:32px;border-top:1px solid rgba(255,255,255,.1);font-size:13px}
.footer-note{font-size:13px}
.footer-icp{display:inline;color:var(--gray-400)}

/* --- 移动端适配 --- */
@media (max-width: 768px) {
  .nav-links{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--white);flex-direction:column;padding:16px 20px;gap:12px;box-shadow:var(--shadow-md)}
  .nav-links.open{display:flex}
  .hamburger{display:block}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .footer .container{grid-template-columns:1fr;gap:24px}
  .about-values{grid-template-columns:1fr}
  .about-values-2,
  .about-values-3,
  .about-values-4{grid-template-columns:1fr}
  .section{padding:48px 0}
  .hero{padding:64px 0 48px}
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
}