/* ===== 全局样式 ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
:root{
  --primary:#1a6b4a;
  --primary-light:#4a9e6d;
  --primary-dark:#124d35;
  --accent:#d4a843;
  --bg:#f5f7f5;
  --white:#ffffff;
  --text:#333333;
  --text-light:#666666;
  --text-muted:#999999;
  --border:#e0e0e0;
  --shadow:0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover:0 8px 30px rgba(0,0,0,0.12);
  --radius:12px;
  --transition:all .3s ease;
}
html{ scroll-behavior:smooth; }
body{
  font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{ color:var(--primary); text-decoration:none; transition:var(--transition); }
a:hover{ color:var(--primary-dark); }
img{ max-width:100%; height:auto; display:block; }
ul{ list-style:none; }
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 32px; border-radius:50px; font-size:15px; font-weight:500;
  cursor:pointer; transition:var(--transition); border:none; outline:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:var(--white); box-shadow:0 4px 15px rgba(26,107,74,0.3);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 6px 20px rgba(26,107,74,0.4); color:var(--white); }
.btn-outline{
  background:transparent; color:var(--primary);
  border:2px solid var(--primary);
}
.btn-outline:hover{ background:var(--primary); color:var(--white); }
.btn-accent{
  background:linear-gradient(135deg,var(--accent),#c49a3a);
  color:var(--white); box-shadow:0 4px 15px rgba(212,168,67,0.3);
}
.btn-accent:hover{ transform:translateY(-2px); box-shadow:0 6px 20px rgba(212,168,67,0.4); color:var(--white); }
.btn-block{ width:100%; }
.btn-lg{ padding:14px 40px; font-size:16px; }

/* ===== 导航栏 ===== */
.navbar{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  background:rgba(255,255,255,0.95); backdrop-filter:blur(12px);
  box-shadow:0 2px 10px rgba(0,0,0,0.05); transition:var(--transition);
}
.navbar .container{
  display:flex; align-items:center; justify-content:space-between;
  height:72px;
}
.logo{
  display:flex; align-items:center; gap:10px; font-size:22px; font-weight:700;
  color:var(--primary); letter-spacing:1px;
}
.logo-icon{
  width:40px; height:40px; background:linear-gradient(135deg,var(--primary),var(--primary-light));
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:var(--white); font-size:20px;
}
.nav-links{ display:flex; align-items:center; gap:36px; }
.nav-links a{
  font-size:15px; font-weight:500; color:var(--text); position:relative;
  padding:4px 0;
}
.nav-links a::after{
  content:''; position:absolute; bottom:0; left:0; width:0; height:2px;
  background:var(--primary); transition:var(--transition); border-radius:1px;
}
.nav-links a:hover::after,.nav-links a.active::after{ width:100%; }
.nav-links a.active,.nav-links a:hover{ color:var(--primary); }
.nav-actions{ display:flex; align-items:center; gap:16px; }
.nav-actions .btn{ padding:8px 24px; font-size:14px; }
.nav-toggle{ display:none; flex-direction:column; gap:5px; cursor:pointer; }
.nav-toggle span{
  width:24px; height:2px; background:var(--text); border-radius:1px; transition:var(--transition);
}

/* ===== 页面标题横幅 ===== */
.page-banner{
  padding:140px 0 60px; text-align:center;
  background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  color:var(--white); position:relative; overflow:hidden;
}
.page-banner::before{
  content:''; position:absolute; top:-50%; right:-10%; width:600px; height:600px;
  background:rgba(255,255,255,0.03); border-radius:50%;
}
.page-banner h1{ font-size:36px; font-weight:700; margin-bottom:12px; position:relative; }
.page-banner p{ font-size:16px; opacity:0.85; position:relative; }
.breadcrumb{
  display:flex; align-items:center; justify-content:center; gap:8px;
  margin-top:16px; font-size:14px; opacity:0.8; position:relative;
}
.breadcrumb a{ color:rgba(255,255,255,0.8); }
.breadcrumb a:hover{ color:var(--white); }

/* ===== 首页 Banner ===== */
.hero{
  min-height:100vh; display:flex; align-items:center;
  background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  color:var(--white); position:relative; overflow:hidden; padding-top:72px;
}
.hero::before{
  content:''; position:absolute; top:-20%; right:-10%; width:800px; height:800px;
  background:rgba(255,255,255,0.04); border-radius:50%;
}
.hero::after{
  content:''; position:absolute; bottom:-10%; left:-5%; width:500px; height:500px;
  background:rgba(212,168,67,0.06); border-radius:50%;
}
.hero .container{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; position:relative; }
.hero-content h1{ font-size:48px; font-weight:700; line-height:1.2; margin-bottom:20px; }
.hero-content h1 span{ color:var(--accent); }
.hero-content p{ font-size:18px; opacity:0.9; margin-bottom:32px; line-height:1.8; }
.hero-btns{ display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats{ display:flex; gap:40px; margin-top:48px; }
.hero-stat h3{ font-size:32px; font-weight:700; color:var(--accent); }
.hero-stat p{ font-size:14px; opacity:0.8; margin-top:4px; }
.hero-image{
  display:flex; align-items:center; justify-content:center;
  position:relative;
}
.hero-image-placeholder{
  width:500px; height:400px; background:rgba(255,255,255,0.08);
  border-radius:var(--radius); display:flex; align-items:center; justify-content:center;
  border:1px solid rgba(255,255,255,0.1);
}
.hero-image-placeholder .icon{ font-size:120px; opacity:0.3; }

/* ===== 区块标题 ===== */
.section-header{ text-align:center; margin-bottom:56px; }
.section-header h2{ font-size:32px; font-weight:700; color:var(--text); margin-bottom:12px; }
.section-header p{ font-size:16px; color:var(--text-light); }
.section-header .subtitle{
  display:inline-block; background:linear-gradient(135deg,var(--primary),var(--primary-light));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  font-weight:600; font-size:14px; letter-spacing:2px; text-transform:uppercase;
  margin-bottom:8px;
}

/* ===== 产品卡片 ===== */
.products-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:28px; }
.product-card{
  background:var(--white); border-radius:var(--radius); overflow:hidden;
  box-shadow:var(--shadow); transition:var(--transition);
}
.product-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-hover); }
.product-image{
  height:220px; background:linear-gradient(135deg,#e8f5e9,#c8e6c9);
  display:flex; align-items:center; justify-content:center;
}
.product-image .icon{ font-size:64px; opacity:0.4; }
.product-info{ padding:24px; }
.product-info h3{ font-size:18px; font-weight:600; margin-bottom:8px; color:var(--text); }
.product-info p{ font-size:14px; color:var(--text-light); margin-bottom:16px; line-height:1.6; }
.product-meta{ display:flex; align-items:center; justify-content:space-between; }
.product-price{ font-size:22px; font-weight:700; color:var(--primary); }
.product-price span{ font-size:14px; color:var(--text-muted); font-weight:400; }
.product-tag{
  display:inline-block; padding:4px 12px; background:rgba(26,107,74,0.08);
  color:var(--primary); font-size:12px; border-radius:20px; font-weight:500;
}

/* ===== 特性/优势卡片 ===== */
.features-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:28px; }
.feature-card{
  background:var(--white); border-radius:var(--radius); padding:36px 28px;
  box-shadow:var(--shadow); transition:var(--transition); text-align:center;
}
.feature-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-hover); }
.feature-icon{
  width:64px; height:64px; margin:0 auto 20px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:var(--white); font-size:28px;
}
.feature-card h3{ font-size:18px; font-weight:600; margin-bottom:10px; }
.feature-card p{ font-size:14px; color:var(--text-light); line-height:1.7; }

/* ===== 通用区块 ===== */
.section{ padding:80px 0; }
.section-alt{ background:var(--white); }

/* ===== 关于页面 ===== */
.about-content{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.about-image{
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow);
  min-height:400px; background:linear-gradient(135deg,var(--primary),var(--primary-light));
  display:flex; align-items:center; justify-content:center; color:var(--white);
}
.about-image .icon{ font-size:100px; opacity:0.2; }
.about-text h2{ font-size:32px; font-weight:700; margin-bottom:20px; }
.about-text p{ color:var(--text-light); margin-bottom:16px; line-height:1.8; }
.about-info{ margin-top:32px; }
.about-info-item{ display:flex; align-items:flex-start; gap:16px; margin-bottom:20px; }
.about-info-icon{
  width:48px; height:48px; border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  display:flex; align-items:center; justify-content:center;
  color:var(--white); font-size:20px; flex-shrink:0;
}
.about-info-item h4{ font-size:16px; font-weight:600; margin-bottom:4px; }
.about-info-item p{ font-size:14px; color:var(--text-light); margin:0; }

/* ===== 联系方式 ===== */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:40px; }
.contact-info{ display:grid; grid-template-columns:1fr; gap:24px; }
.contact-item{
  background:var(--white); border-radius:var(--radius); padding:28px;
  box-shadow:var(--shadow); display:flex; align-items:flex-start; gap:16px;
  transition:var(--transition);
}
.contact-item:hover{ transform:translateY(-2px); box-shadow:var(--shadow-hover); }
.contact-item-icon{
  width:48px; height:48px; border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  display:flex; align-items:center; justify-content:center;
  color:var(--white); font-size:20px; flex-shrink:0;
}
.contact-item h4{ font-size:16px; font-weight:600; margin-bottom:6px; }
.contact-item p,.contact-item a{ font-size:14px; color:var(--text-light); line-height:1.7; }
.contact-item a:hover{ color:var(--primary); }

/* ===== 表单 ===== */
.form-group{ margin-bottom:20px; }
.form-label{ display:block; font-size:14px; font-weight:500; margin-bottom:8px; color:var(--text); }
.form-input{
  width:100%; padding:14px 18px; border:1px solid var(--border);
  border-radius:10px; font-size:15px; color:var(--text);
  background:var(--white); transition:var(--transition); outline:none;
}
.form-input:focus{ border-color:var(--primary); box-shadow:0 0 0 3px rgba(26,107,74,0.1); }
.form-input::placeholder{ color:var(--text-muted); }
textarea.form-input{ resize:vertical; min-height:120px; }
.form-card{
  background:var(--white); border-radius:var(--radius); padding:36px;
  box-shadow:var(--shadow);
}
.form-card h3{ font-size:22px; font-weight:700; margin-bottom:8px; }
.form-card>p{ color:var(--text-light); margin-bottom:28px; font-size:14px; }
.form-footer{ text-align:center; margin-top:20px; font-size:14px; color:var(--text-light); }
.form-footer a{ font-weight:500; }

/* ===== 复选框 ===== */
.checkbox-wrap{ display:flex; align-items:center; gap:10px; cursor:pointer; }
.checkbox-wrap input[type="checkbox"]{
  width:18px; height:18px; accent-color:var(--primary); cursor:pointer;
}
.checkbox-wrap label{ font-size:14px; color:var(--text-light); cursor:pointer; }
.checkbox-wrap label a{ color:var(--primary); font-weight:500; }

/* ===== 登录/注册页面 ===== */
.auth-page{ min-height:100vh; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  padding:80px 20px;
}
.auth-box{
  width:100%; max-width:480px; background:var(--white); border-radius:var(--radius);
  padding:48px 40px; box-shadow:0 20px 60px rgba(0,0,0,0.2);
}
.auth-box .logo{ justify-content:center; margin-bottom:32px; }
.auth-box h2{ text-align:center; font-size:26px; font-weight:700; margin-bottom:8px; }
.auth-box>p{ text-align:center; color:var(--text-light); margin-bottom:32px; font-size:14px; }

/* ===== 隐私协议弹窗 ===== */
.modal-overlay{
  position:fixed; inset:0; background:rgba(0,0,0,0.5);
  display:flex; align-items:center; justify-content:center;
  z-index:9999; opacity:0; visibility:hidden; transition:var(--transition);
}
.modal-overlay.active{ opacity:1; visibility:visible; }
.modal{
  background:var(--white); border-radius:var(--radius); width:90%; max-width:600px;
  max-height:80vh; overflow:hidden; box-shadow:0 20px 60px rgba(0,0,0,0.2);
  transform:scale(0.95); transition:var(--transition);
}
.modal-overlay.active .modal{ transform:scale(1); }
.modal-header{ padding:20px 24px; border-bottom:1px solid var(--border); display:flex; justify-content:space-between; align-items:center; }
.modal-header h3{ font-size:18px; font-weight:700; }
.modal-close{ width:32px; height:32px; border-radius:50%; border:none; background:var(--bg);
  cursor:pointer; display:flex; align-items:center; justify-content:center;
  font-size:18px; color:var(--text-light); transition:var(--transition);
}
.modal-close:hover{ background:var(--border); color:var(--text); }
.modal-body{ padding:24px; max-height:calc(80vh - 140px); overflow-y:auto; font-size:14px; line-height:1.8; color:var(--text-light); }
.modal-body h4{ font-size:16px; font-weight:600; color:var(--text); margin:16px 0 8px; }
.modal-body p{ margin-bottom:12px; }
.modal-footer{ padding:16px 24px; border-top:1px solid var(--border); text-align:right; }

/* ===== 页脚 ===== */
.footer{ background:#0f2e1f; color:rgba(255,255,255,0.7); padding:60px 0 0; }
.footer-grid{ display:grid; grid-template-columns:2fr 1fr 1fr 1.5fr; gap:40px; margin-bottom:40px; }
.footer-brand .logo{ color:var(--white); margin-bottom:16px; }
.footer-brand p{ font-size:14px; line-height:1.8; color:rgba(255,255,255,0.6); }
.footer-col h4{ font-size:16px; font-weight:600; color:var(--white); margin-bottom:20px; }
.footer-col ul li{ margin-bottom:12px; }
.footer-col ul li a{ color:rgba(255,255,255,0.6); font-size:14px; }
.footer-col ul li a:hover{ color:var(--accent); }
.footer-contact p{ font-size:14px; margin-bottom:8px; display:flex; align-items:flex-start; gap:8px; }
.footer-contact .icon{ color:var(--accent); flex-shrink:0; margin-top:2px; }
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1); padding:24px 0;
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px;
}
.footer-bottom p{ font-size:13px; color:rgba(255,255,255,0.5); }
.footer-bottom a{ color:rgba(255,255,255,0.6); }
.footer-bottom a:hover{ color:var(--accent); }

/* ===== 隐私政策独立页 ===== */
.privacy-content{ max-width:800px; margin:0 auto; background:var(--white);
  border-radius:var(--radius); padding:48px; box-shadow:var(--shadow);
}
.privacy-content h1{ font-size:28px; font-weight:700; margin-bottom:8px; }
.privacy-content .privacy-date{ color:var(--text-muted); font-size:14px; margin-bottom:32px; display:block; }
.privacy-content h2{ font-size:20px; font-weight:700; margin:32px 0 16px; color:var(--primary-dark); }
.privacy-content h3{ font-size:16px; font-weight:600; margin:20px 0 10px; }
.privacy-content p,.privacy-content li{ font-size:15px; color:var(--text-light); line-height:1.9; margin-bottom:10px; }
.privacy-content ul{ list-style:disc; padding-left:24px; margin-bottom:16px; }
.privacy-content ol{ padding-left:24px; margin-bottom:16px; }
.privacy-content li{ margin-bottom:6px; }
.privacy-intro{ background:var(--bg); border-radius:var(--radius); padding:24px; margin-bottom:32px; }
.privacy-intro p{ margin:0; }

/* ===== 响应式 ===== */
@media(max-width:992px){
  .hero .container{ grid-template-columns:1fr; text-align:center; gap:40px; }
  .hero-content h1{ font-size:36px; }
  .hero-stats{ justify-content:center; }
  .hero-image{ order:-1; }
  .about-content,.contact-grid{ grid-template-columns:1fr; }
  .about-image{ order:-1; min-height:280px; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media(max-width:768px){
  .nav-links{ display:none; position:absolute; top:72px; left:0; right:0;
    background:var(--white); flex-direction:column; padding:20px;
    box-shadow:0 10px 30px rgba(0,0,0,0.1); gap:16px;
  }
  .nav-links.active{ display:flex; }
  .nav-actions .btn-outline{ display:none; }
  .nav-toggle{ display:flex; }
  .hero-content h1{ font-size:28px; }
  .hero-stats{ gap:24px; }
  .hero-stat h3{ font-size:24px; }
  .section{ padding:60px 0; }
  .section-header h2{ font-size:24px; }
  .features-grid,.products-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:32px; }
  .footer-bottom{ flex-direction:column; text-align:center; }
  .page-banner h1{ font-size:28px; }
  .auth-box{ padding:36px 24px; }
  .privacy-content{ padding:28px; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp{
  from{ opacity:0; transform:translateY(30px); }
  to{ opacity:1; transform:translateY(0); }
}
.animate-in{ animation:fadeInUp .6s ease forwards; }