/* =============================================================
 *  shared.css · CNCer 健康教练平台
 *  各 _preview/ 页面共用的基础样式
 *  仅包含「绝对相同」的部分：变量 / reset / progress / reveal / modal / footer
 *  各页特有的 nav、hero、section 仍 inline 在该页 <style> 中
 * ============================================================= */

/* ========= 1. CSS Variables ========= */
:root{
  --green-deep:#1a3c2a;
  --green-mid:#3d6b46;
  --green-soft:#dee5d0;
  --green-pale:#e8edd9;
  --olive:#8fa831;
  --green-glow:#8fa831;
  --bg:#fafaf7;
  --bg2:#f3f1ea;
  --bg3:#eef2e8;
  --t1:#1a3c2a;
  --t2:#3a4a3f;
  --t3:#6b7670;
  --grey-mid:#9aa49d;
  --grey-pale:#c8cec5;
  --r:14px;
  --r-sm:8px;
  --shadow-sm:0 2px 12px rgba(26,60,42,.06);
  --shadow-md:0 8px 24px rgba(26,60,42,.10);
  --shadow-lg:0 16px 40px rgba(26,60,42,.14);
}

/* ========= 2. Reset & Base ========= */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:'Noto Sans SC','PingFang SC',-apple-system,sans-serif;
  font-weight:400;color:var(--t1);background:var(--bg);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  line-height:1.75;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}

/* ========= 3. Scroll Progress Bar ========= */
.progress-bar{
  position:fixed;top:0;left:0;height:2px;
  background:linear-gradient(90deg,var(--green-glow),var(--green-mid));
  z-index:200;width:0;transition:width .15s ease;
}

/* ========= 4. Highlight ========= */
.highlight{
  background:linear-gradient(180deg,transparent 60%,rgba(143,168,49,.35) 60%);
  padding:0 2px;font-weight:500;color:var(--green-deep);
}

/* ========= 5. Reveal Animation ========= */
.reveal{
  opacity:0;transform:translateY(22px);
  transition:opacity .9s ease, transform .9s ease;
}
.reveal.in{opacity:1;transform:translateY(0);}
.delay-1{transition-delay:.1s;}
.delay-2{transition-delay:.2s;}
.delay-3{transition-delay:.3s;}

/* ========= 6. QR Modal ========= */
.qr-modal{
  position:fixed;inset:0;z-index:300;
  display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;pointer-events:none;transition:opacity .3s ease;
}
.qr-modal.open{opacity:1;pointer-events:auto;}
.qr-backdrop{
  position:absolute;inset:0;background:rgba(10,31,21,.78);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.qr-modal-card{
  position:relative;z-index:2;background:#fff;border-radius:var(--r);
  padding:40px 36px 32px;text-align:center;max-width:340px;width:100%;
  box-shadow:0 24px 60px rgba(0,0,0,.35);
  transform:scale(.92);transition:transform .35s cubic-bezier(.34,1.56,.64,1);
}
.qr-modal.open .qr-modal-card{transform:scale(1);}
.qr-close{
  position:absolute;top:10px;right:14px;
  width:30px;height:30px;border-radius:50%;
  background:transparent;border:none;cursor:pointer;
  font-size:24px;line-height:1;color:var(--grey-mid);
  transition:all .25s;
}
.qr-close:hover{background:var(--bg2);color:var(--green-deep);}
.qr-image{
  width:240px;height:240px;display:block;margin:0 auto 18px;border-radius:6px;
}
.qr-title{
  font-family:'Noto Serif SC',serif;font-size:17px;font-weight:600;
  color:var(--green-deep);margin-bottom:6px;letter-spacing:1px;
}
.qr-caption{font-size:13px;color:var(--t2);line-height:1.7;margin:0;}

/* ========= 7. Footer 基础 ========= */
footer{
  background:#0a1f15;color:rgba(255,255,255,.5);
  padding:36px 24px;text-align:center;font-size:12px;letter-spacing:1.5px;
}
footer .foot-links{
  margin-bottom:14px;display:flex;justify-content:center;gap:18px;flex-wrap:wrap;
}
footer .foot-links a{color:rgba(255,255,255,.6);transition:color .3s;}
footer .foot-links a:hover{color:#fff;}

/* ========= 8. Nav 基础（深绿背景版 · 子页通用） ========= */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:150;
  background:rgba(26,60,42,.92);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  padding:14px 32px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav.scrolled{box-shadow:0 2px 16px rgba(0,0,0,.12);}
.nav-logo{
  display:inline-block;height:30px;transition:opacity .3s;
}
.nav-logo:hover{opacity:.85;}
.nav-logo img{height:100%;display:block;}
.nav-menu{display:flex;gap:24px;align-items:center;}
.nav-menu a{
  font-size:13px;color:rgba(255,255,255,.72);
  letter-spacing:1.5px;font-weight:300;
  transition:color .2s;
  display:inline-flex;align-items:center;gap:6px;
}
.nav-menu a:hover,.nav-menu a.active{color:#fff;font-weight:500;}
.nav-menu a svg{width:14px;height:14px;flex-shrink:0;}
@media (max-width:880px){
  .nav{padding:12px 18px;}
  .nav-menu{gap:14px;}
  .nav-menu a{font-size:12px;letter-spacing:.5px;}
}
@media (max-width:540px){
  .nav-menu a{font-size:11.5px;letter-spacing:0;}
  .nav-menu{gap:10px;}
}

/* ========= 9. Section Base ========= */
section{padding:100px 0;position:relative;}
.container{max-width:1000px;margin:0 auto;padding:0 24px;}
.section-eyebrow{
  display:inline-block;font-size:11px;letter-spacing:5px;color:var(--green-mid);
  font-weight:500;margin-bottom:18px;text-transform:uppercase;
}
.section-title{
  font-family:'Noto Serif SC',serif;font-weight:700;
  font-size:clamp(22px,3.6vw,32px);line-height:1.45;
  color:var(--green-deep);margin-bottom:18px;letter-spacing:1px;
}
.section-lead{
  font-size:clamp(15px,1.8vw,17px);color:var(--t2);
  line-height:2;margin-bottom:18px;
}
.section-header{margin-bottom:48px;text-align:center;}

/* ========= 10. 通用 p 与文字 ========= */
p{color:var(--t2);font-size:15.5px;line-height:2;margin-bottom:14px;}

/* ========= 11. 手机端二维码尺寸统一收缩 ========= */
@media (max-width:680px){
  .cta-qr img,
  .ca-qr img,
  .closing-qr img,
  .contact-item img,
  .cta-qr-big img,
  .contact-card img{
    width:130px !important;
    height:130px !important;
  }
}