/* ========== 纳客收银系统 · 行业解决方案导航页 样式表 ========== */

/* ========== 0. 设计变量与全局重置 ========== */
:root{
  --primary:#18A058;
  --primary-dark:#13864A;
  --bg-soft:#F2FAF4;
  --text:#1F2733;
  --text-muted:#68738A;
  --border:#E5E9F2;
  --radius:8px;
  --header-h:60px;
  --shadow-sm:0 1px 6px rgba(31,39,51,.08);
  --shadow-md:0 6px 18px rgba(24,160,88,.16);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:#fff;
  font-size:14px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
img{max-width:100%;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
/* 吸顶导航遮挡锚点补偿 */
section[id]{scroll-margin-top:calc(var(--header-h) + 8px);}

/* ========== 1. 顶部导航 Header ========== */
.site-header{
  position:sticky;top:0;z-index:100;
  height:var(--header-h);
  background:#fff;
  box-shadow:var(--shadow-sm);
}
.header-inner{
  height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:700;color:var(--text);white-space:nowrap;}
.brand-mark{
  width:26px;height:26px;border-radius:6px;flex:none;
  background:linear-gradient(135deg,var(--primary),#63D68F);
  color:#fff;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav a{font-size:14px;color:var(--text-muted);transition:color .2s;}
.main-nav a:hover{color:var(--primary);}
.btn-trial{
  display:inline-flex;align-items:center;justify-content:center;
  height:36px;padding:0 18px;border-radius:8px;flex:none;
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 2px 8px rgba(24,160,88,.32);
  transition:background .2s,transform .2s;
}
.btn-trial:hover{background:var(--primary-dark);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:38px;height:38px;border:1px solid var(--border);border-radius:8px;
  background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s,opacity .2s;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
/* 移动端抽屉菜单 */
.mobile-nav{display:none;border-top:1px solid var(--border);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav.is-open{display:block;}
.mobile-nav a{display:block;padding:12px 20px;font-size:14px;color:var(--text);border-bottom:1px solid var(--bg-soft);}
.mobile-nav .btn-trial{margin:12px 20px;color:#fff;}

/* ========== 2. Banner（紧凑小 Banner） ========== */
.banner{
  background:linear-gradient(180deg,var(--bg-soft),#fff);
  border-bottom:1px solid var(--border);
  text-align:center;
}
.banner-inner{padding:34px 20px;}
.banner h1{font-size:26px;font-weight:700;letter-spacing:.5px;color:var(--text);}
.banner .banner-sub{margin-top:8px;font-size:14px;color:var(--text-muted);}

/* ========== 3. 区块导语 ========== */
.section-lead{text-align:center;padding:40px 20px 8px;}
.section-lead h2{font-size:22px;font-weight:700;}
.section-lead p{margin-top:8px;font-size:13px;color:var(--text-muted);max-width:640px;}

/* ========== 4. 行业栏目与卡片 ========== */
.industry-wrap{padding:24px 0 8px;}
.industry-block{margin-bottom:44px;}
.industry-block h3{
  font-size:17px;font-weight:700;
  border-left:4px solid var(--tc,var(--primary));
  padding-left:10px;line-height:1.35;
}
.industry-sub{margin:4px 0 12px 14px;font-size:12px;color:var(--text-muted);}
.sol-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(180px,1fr));
  gap:10px;
}
.sol-card{
  min-height:100px;
  display:flex;flex-direction:column;gap:5px;justify-content:space-between;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:10px;font-size:12px;
  transition:transform .2s,border-color .2s,box-shadow .2s;
}
.sol-card:hover{
  transform:translateY(-2px);
  border-color:var(--tc,var(--primary));
  box-shadow:var(--shadow-md);
}
.sol-card:focus-visible{outline:2px solid var(--tc,var(--primary));outline-offset:2px;}
.sol-card-title{font-size:13px;font-weight:600;line-height:1.4;color:var(--text);}
.sol-card-desc{
  font-size:12px;color:var(--text-muted);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.sol-card-tags{display:flex;flex-wrap:wrap;gap:4px;}
.tag{
  font-size:11px;line-height:1.5;padding:1px 7px;border-radius:4px;
  color:var(--tc,var(--primary));background:var(--tc-bg,rgba(24,160,88,.08));
  white-space:nowrap;
}

/* ========== 5. 白皮书板块 ========== */
.whitepaper{background:var(--bg-soft);padding:48px 0 52px;}
.whitepaper h2{font-size:20px;font-weight:700;text-align:center;}
.whitepaper .wp-sub{margin:6px 0 22px;font-size:13px;color:var(--text-muted);text-align:center;}
.wp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.wp-item{
  background:#fff;border:1px solid var(--border);border-radius:10px;
  padding:18px 20px;display:flex;flex-direction:column;gap:8px;
  transition:border-color .2s,box-shadow .2s,transform .2s;
}
.wp-item:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px);}
.wp-item h4{font-size:15px;font-weight:600;line-height:1.5;}
.wp-item p{
  font-size:13px;line-height:1.7;color:var(--text-muted);flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.wp-link{font-size:13px;color:var(--primary);font-weight:600;align-self:flex-start;}
.wp-link:hover{text-decoration:underline;}

/* ========== 6. 免费体验 CTA ========== */
.cta{background:var(--primary);color:#fff;text-align:center;padding:42px 20px;}
.cta h2{font-size:20px;font-weight:700;}
.cta p{margin:8px 0 20px;font-size:13px;color:rgba(255,255,255,.85);}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 42px;border-radius:10px;
  background:#fff;color:var(--primary);font-size:16px;font-weight:700;
  box-shadow:0 4px 14px rgba(9,66,36,.28);
  transition:transform .2s,box-shadow .2s;
}
.btn-cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(9,66,36,.34);}

/* ========== 7. 页脚 Footer ========== */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:30px 0 18px;font-size:12px;color:#8A94A6;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;}
.footer-brand{font-size:15px;font-weight:700;color:var(--text);}
.footer-col h5{font-size:12px;font-weight:600;color:var(--text);margin-bottom:8px;}
.footer-col a{display:block;padding:3px 0;color:#8A94A6;}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:20px;padding-top:12px;border-top:1px solid var(--border);
  text-align:center;font-size:12px;color:#A6AEBF;
}

/* ========== 响应式断点 ========== */
/* ≤1200px：收窄容器与间距 */
@media (max-width:1200px){
  .container{max-width:1000px;}
  .industry-block{margin-bottom:38px;}
}
/* ≤992px：白皮书两列、导航间距缩小 */
@media (max-width:992px){
  .main-nav{gap:16px;}
  .wp-grid{grid-template-columns:repeat(2,1fr);}
  .banner h1{font-size:23px;}
}
/* ≤768px：汉堡菜单、卡片两列、Banner 减高 */
@media (max-width:768px){
  .main-nav{display:none;}
  .header-cta{display:none;}
  .nav-toggle{display:flex;}
  .banner-inner{padding:24px 16px;}
  .banner h1{font-size:20px;}
  .banner .banner-sub{font-size:13px;}
  .section-lead{padding:28px 16px 4px;}
  .section-lead h2{font-size:19px;}
  .sol-grid{grid-template-columns:repeat(2,1fr);}
  .industry-block{margin-bottom:30px;}
  .whitepaper{padding:34px 0 38px;}
  .cta{padding:34px 16px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
/* ≤480px：卡片单列、白皮书单列 */
@media (max-width:480px){
  .sol-grid{grid-template-columns:1fr;}
  .wp-grid{grid-template-columns:1fr;}
  .brand{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .btn-cta{width:100%;padding:0 20px;}
}