/* 川派医生集团 · 二期设计系统（壳层）
   唯一真源：改这里会影响所有引用页；页面专属版式写在各页 <style> 内。
   规范见 design-mockup/DESIGN.md */
:root{
  --measure:44em;            /* 满宽段落行长上限，1em = 1 个汉字 */

  --red:#E83743;
  --red-dk:#C41F2B;
  --red-lt:#FDECEE;
  --ink:#141416;
  --ink-2:#26262A;
  --gray-1:#6E6E73;
  --gray-2:#A8A8AE;
  --gray-3:#E4E4E2;
  --gray-4:#F4F3F1;
  --paper:#FFFFFF;
  --warm:#FAF8F5;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  --serif:"Songti SC","SimSun",Georgia,"Times New Roman",serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --maxw:1280px;
  --pad:clamp(20px,4vw,64px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
  font-feature-settings:"tnum" 1;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.22}
p{margin:0}
button{font:inherit;cursor:pointer}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}



/* ── eyebrow / section head system ─────────────────────── */
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-size:11px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;
  color:var(--red);font-family:var(--mono);
}
.eyebrow .mark{width:16px;height:16px;flex:none}
.eyebrow .num{color:var(--gray-2);letter-spacing:.12em}
.sec-h{
  margin-top:18px;font-size:clamp(26px,3.4vw,42px);
}
.sec-h em{font-style:normal;color:var(--red)}
.sec-sub{margin-top:14px;max-width:var(--measure);color:var(--gray-1);font-size:15.5px;line-height:1.95}
.sec-head{position:relative}
.sec-head .rule{
  margin-top:26px;height:3px;width:56px;background:var(--red);
}



/* ── button ────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 26px;border-radius:2px;font-size:15px;font-weight:700;letter-spacing:.03em;transition:transform .2s,background .2s,color .2s,border-color .2s}
.btn-r{background:var(--red);color:#fff;box-shadow:0 16px 34px -18px rgba(232,55,67,.95)}
.btn-r:hover{background:var(--red-dk);transform:translateY(-2px)}
.btn-g{border:1px solid rgba(255,255,255,.3);color:#fff}
.btn-g:hover{border-color:#fff;background:rgba(255,255,255,.07)}
.btn .ar{width:16px;height:16px;transition:transform .25s}
.btn:hover .ar{transform:translateX(4px)}



/* ── utility bar ───────────────────────────────────────── */
.util{background:var(--ink);color:#B6B6BC;font-size:12.5px;letter-spacing:.02em}
.util .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:38px}
.util .slogan{display:flex;align-items:center;gap:9px;color:#EDEDEA}
.util .slogan i{width:6px;height:6px;background:var(--red);border-radius:50%;display:inline-block}
.util .meta{display:flex;align-items:center;gap:22px}
.util .meta b{color:#fff;font-weight:600;font-family:var(--mono);letter-spacing:.03em}
@media(max-width:900px){.util .meta span:nth-child(1){display:none}}
@media(max-width:680px){.util .meta span:nth-child(2){display:none}}



/* ── header ───────────────────────────────────────────── */
.hd{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--gray-3);transition:box-shadow .3s,padding .3s}
.hd.stuck{box-shadow:0 10px 34px -22px rgba(20,20,22,.42)}
.hd .wrap{display:flex;align-items:center;gap:26px;height:82px;transition:height .3s}
.hd.stuck .wrap{height:66px}
.brand img{height:38px;width:auto;transition:height .3s}
.hd.stuck .brand img{height:32px}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  position:relative;padding:10px 15px;font-size:15.5px;font-weight:600;color:var(--ink-2);
  transition:color .2s;
}
.nav a::after{content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .28s cubic-bezier(.16,1,.3,1)}
.nav a:hover{color:var(--red)}
.nav a:hover::after,.nav a.on::after{transform:scaleX(1)}
.nav a.on{color:var(--red)}
.hd .cta{
  margin-left:14px;background:var(--red);color:#fff;border:none;border-radius:2px;
  padding:13px 22px;font-size:14.5px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 12px 26px -14px rgba(232,55,67,.9);transition:transform .2s,background .2s;
}
.hd .cta:hover{background:var(--red-dk);transform:translateY(-2px)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--gray-3);border-radius:2px;padding:9px 11px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0;transition:transform .28s,opacity .2s}
.burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* mobile drawer */
.mnav{position:absolute;left:0;right:0;top:100%;z-index:59;background:#fff;border-bottom:1px solid var(--gray-3);
  box-shadow:0 26px 46px -26px rgba(20,20,22,.42);display:none;max-height:calc(100vh - 90px);overflow-y:auto}
.mnav.open{display:block;animation:drop .26s cubic-bezier(.16,1,.3,1) both}
@keyframes drop{from{transform:translateY(-14px);opacity:0}to{transform:none;opacity:1}}
.mnav a{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;font-size:16px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--gray-3)}
.mnav a.go{border-bottom:none}
.mnav a .no{font-family:var(--mono);font-size:11px;color:var(--gray-2);letter-spacing:.12em}
.mnav .go{display:block;margin:0 20px 20px;background:var(--red);color:#fff;text-align:center;padding:15px;border-radius:2px;font-weight:700;letter-spacing:.04em}
body.lock{overflow:hidden}
@media(max-width:1080px){
  .nav,.hd .cta{display:none}
  .burger{display:block}
}



/* ── generic section ───────────────────────────────────── */
.sect{padding-block:clamp(64px,8vw,110px)}
.sect.gray{background:var(--warm)}
.sect.dark{background:var(--ink);color:#fff}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;flex-wrap:wrap}
.more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--red);letter-spacing:.04em;border-bottom:1px solid transparent;transition:border-color .2s}
.more:hover{border-color:var(--red)}
.more svg{width:15px;height:15px}