/* ============================================================
   Shifeng Intelli — Shared Styles
   实丰智联 全站共享样式
   ============================================================ */

/* ============ Reset & Base ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{
  font-family:'Noto Sans SC','Manrope',-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;
  background:#fbf8f3;
  color:#12163a;
  overflow-x:hidden;
  line-height:1.7;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}

:root{
  --bg:#fbf8f3;
  --bg-soft:#f4efe6;
  --bg-tint:#eef1fb;
  --surface:#ffffff;
  --ink:#12163a;
  --ink-soft:#3d456b;
  --ink-dim:#6a7292;
  --line:rgba(18,22,58,0.08);
  --line-strong:rgba(18,22,58,0.14);
  --glass:rgba(255,255,255,0.7);

  --violet:#6d53ff;
  --cyan:#0bb5c6;
  --amber:#eba454;
  --pink:#ff79b0;
  --mint:#4fc9a1;

  --grad-brand:linear-gradient(135deg,#6d53ff 0%,#0bb5c6 58%,#eba454 100%);
  --grad-brand-soft:linear-gradient(135deg,rgba(109,83,255,.14),rgba(11,181,198,.12) 55%,rgba(235,164,84,.14));

  --shadow-sm:0 2px 8px rgba(18,22,58,.04);
  --shadow-md:0 20px 50px -20px rgba(18,22,58,.18);
  --shadow-lg:0 40px 100px -30px rgba(18,22,58,.22);
  --shadow-glow:0 30px 80px -20px rgba(109,83,255,.35);

  --radius-xl:32px;
  --radius-lg:24px;
  --radius-md:18px;
  --radius-sm:12px;
  --max:1240px;
}

/* ============ Ambient Background ============ */
.ambient{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(900px 700px at 10% -10%,rgba(109,83,255,.14),transparent 60%),
    radial-gradient(800px 600px at 100% 0%,rgba(11,181,198,.12),transparent 60%),
    radial-gradient(700px 500px at 50% 120%,rgba(235,164,84,.10),transparent 60%),
    #fbf8f3;
}
.grain{
  position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.25;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='.18'/></svg>");
}

/* ============ Layout ============ */
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
section{position:relative;padding:clamp(80px,10vw,140px) 0}

/* ============ Navigation ============ */
header.nav{
  position:fixed;top:16px;left:0;right:0;z-index:50;
  display:flex;justify-content:center;pointer-events:none;
}
.nav-inner{
  pointer-events:auto;
  display:flex;align-items:center;gap:28px;
  padding:9px 12px 9px 20px;
  background:rgba(255,255,255,0.72);
  backdrop-filter:blur(24px) saturate(1.5);
  -webkit-backdrop-filter:blur(24px) saturate(1.5);
  border:1px solid rgba(18,22,58,.08);
  border-radius:999px;
  box-shadow:0 10px 40px -15px rgba(18,22,58,.18);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.01em}
.brand-mark{
  width:32px;height:32px;border-radius:9px;
  background:#fff url("logo.jpg") center/cover no-repeat;
  box-shadow:0 6px 18px -4px rgba(18,22,58,.18);
  border:1px solid rgba(18,22,58,.06);
  flex-shrink:0;
}
.brand-name{font-size:15px;color:var(--ink)}
.brand-name em{font-style:normal;color:var(--ink-dim);font-weight:400;margin-left:6px;font-size:12px;letter-spacing:.08em;text-transform:uppercase}
nav.menu{display:flex;gap:2px}
nav.menu a{
  padding:8px 14px;border-radius:999px;font-size:14px;color:var(--ink-soft);font-weight:500;
  transition:all .25s ease;
}
nav.menu a:hover,nav.menu a.active{color:var(--ink);background:rgba(18,22,58,.05)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;font-size:14px;font-weight:500;
  background:var(--ink);color:#fff;
  box-shadow:0 10px 25px -10px rgba(18,22,58,.5);
  transition:transform .25s ease, box-shadow .25s ease;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 14px 30px -10px rgba(18,22,58,.65)}
.nav-cta svg{width:14px;height:14px}

@media (max-width:860px){
  nav.menu{display:none}
  .nav-inner{padding:7px 8px 7px 16px;gap:10px}
  .brand-name em{display:none}
}

/* ============ Buttons ============ */
.btn-primary{
  position:relative;display:inline-flex;align-items:center;gap:10px;
  padding:16px 28px;border-radius:14px;font-size:15px;font-weight:600;
  background:var(--ink);color:#fff;
  box-shadow:0 20px 40px -16px rgba(18,22,58,.6);
  transition:transform .25s ease, box-shadow .25s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 26px 50px -16px rgba(18,22,58,.75)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  padding:16px 24px;border-radius:14px;font-size:15px;font-weight:500;
  background:rgba(255,255,255,.7);border:1px solid var(--line-strong);color:var(--ink);
  transition:all .25s ease;
  box-shadow:var(--shadow-sm);
}
.btn-ghost:hover{background:#fff;border-color:rgba(18,22,58,.22)}
.btn-primary svg,.btn-ghost svg{width:16px;height:16px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.cta-row.center{justify-content:center}

/* ============ Typography Helpers ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,0.8);
  border:1px solid var(--line-strong);
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:500;
  margin-bottom:28px;
  box-shadow:var(--shadow-sm);
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 3px rgba(79,201,161,.2);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.25);opacity:.7}}

.kicker{
  display:inline-block;font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-dim);margin-bottom:20px;font-weight:600;
}
.kicker::before,.kicker::after{content:"—";margin:0 10px;color:var(--line-strong)}
.section-head.left .kicker::before{display:none}

.section-head{max-width:780px;margin:0 auto 64px;text-align:center}
.section-head.left{margin:0 0 56px;text-align:left;max-width:640px}

h1.display,h2.title,h3.h{
  font-family:'Noto Serif SC','Noto Sans SC',serif;font-weight:500;color:var(--ink);
  letter-spacing:-.01em;
}
h1.display{font-size:clamp(42px,5.8vw,78px);line-height:1.08;margin-bottom:28px}
h2.title{font-size:clamp(34px,4.4vw,56px);line-height:1.14;margin-bottom:20px}
h3.h{font-size:clamp(28px,3.4vw,44px);line-height:1.18;margin-bottom:20px}

.grad{
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-family:'DM Serif Display','Noto Serif SC',serif;font-style:italic;
  /* 防止斜体最后一个字的倾斜部分被 background-clip:text 的窄盒裁切 */
  padding-right:.12em;margin-right:-.04em;
}
.lede{
  font-size:clamp(13px,1.05vw,16.5px);color:var(--ink-soft);margin-bottom:40px;
  white-space:nowrap;max-width:100%;
}
.lede strong{color:var(--ink);font-weight:600}
@media (max-width:860px){
  .lede{white-space:normal;font-size:15px;line-height:1.75}
}
.hero-lede{
  font-size:clamp(16px,1.15vw,18.5px);color:var(--ink-soft);
  max-width:560px;line-height:1.85;margin-bottom:40px;
}
.hero-lede strong{color:var(--ink);font-weight:600}
.sub{font-size:16.5px;color:var(--ink-soft);max-width:640px;margin:0 auto}
.section-head.left .sub{margin:0}

/* ============ Page Header (sub-pages) ============ */
.page-head{
  padding:180px 0 80px;
  text-align:center;position:relative;
}
.page-head h1{
  font-family:'Noto Serif SC',serif;font-weight:500;
  font-size:clamp(40px,5.6vw,72px);line-height:1.1;letter-spacing:-.01em;color:var(--ink);
  margin-bottom:22px;
}
.page-head p.lede{margin-left:auto;margin-right:auto;text-align:center}

/* ============ Cards ============ */
.card{
  position:relative;padding:30px;border-radius:var(--radius-xl);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-md);overflow:hidden;
}
.card.tinted{
  background:linear-gradient(160deg,#f4eeff 0%,#eaf7f9 55%,#fff3e4 100%);
}

/* ============ Bullets ============ */
.bullets{display:flex;flex-direction:column;gap:16px}
.bullets li{list-style:none;display:flex;gap:14px;align-items:flex-start}
.bullets .check{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;
  background:var(--grad-brand);display:grid;place-items:center;margin-top:2px;
  box-shadow:0 6px 14px -4px rgba(109,83,255,.45);
}
.bullets .check svg{width:13px;height:13px;color:#fff}
.bullets strong{color:var(--ink);font-weight:600;margin-right:8px;display:block;margin-bottom:2px}
.bullets span{color:var(--ink-soft);font-size:14.5px}

/* ============ Footer ============ */
footer.site-foot{padding:84px 0 40px;border-top:1px solid var(--line);margin-top:72px;background:rgba(255,255,255,.4)}
.foot{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr;gap:40px;margin-bottom:56px}
@media (max-width:980px){.foot{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:640px){.foot{grid-template-columns:1fr;gap:28px}}
.foot h5{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);margin-bottom:20px;font-weight:700}
.foot ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.foot a{color:var(--ink-soft);font-size:14px;transition:color .25s ease}
.foot a:hover{color:var(--ink)}
.foot .about p{color:var(--ink-soft);font-size:14px;margin-top:16px;max-width:360px;line-height:1.75}
.foot .about .social{display:flex;gap:10px;margin-top:22px}
.foot .about .social a{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);color:var(--ink-soft);
  transition:all .25s ease;
}
.foot .about .social a:hover{color:#fff;background:var(--ink);border-color:var(--ink);transform:translateY(-2px)}
.foot .about .social svg{width:16px;height:16px}
.foot .sub-col li{color:var(--ink-soft);font-size:14px;line-height:1.75}
.foot .newsletter{margin-top:14px;display:flex;gap:6px}
.foot .newsletter input{
  flex:1;padding:10px 14px;border-radius:10px;
  border:1px solid var(--line-strong);background:#fff;font-size:13px;color:var(--ink);
  outline:none;transition:border-color .2s;font-family:inherit;
}
.foot .newsletter input:focus{border-color:var(--violet)}
.foot .newsletter button{
  padding:10px 14px;border-radius:10px;background:var(--ink);color:#fff;font-size:13px;font-weight:500;
  transition:all .25s;
}
.foot .newsletter button:hover{background:var(--violet)}

.foot-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding-top:32px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-dim);
}
.foot-bottom a{color:var(--ink-dim)}
.foot-bottom a:hover{color:var(--ink-soft)}
.foot-bottom .icp{display:flex;gap:18px;flex-wrap:wrap}
.foot-badges{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.foot-badges span{
  padding:4px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:11.5px;color:var(--ink-dim);
}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(28px);transition:all .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ============ Selection ============ */
::selection{background:rgba(109,83,255,.25);color:var(--ink)}

/* ============ Prose (for long-form legal/help text) ============ */
.prose{max-width:820px;margin:0 auto}
.prose h2{
  font-family:'Noto Serif SC',serif;font-weight:500;font-size:26px;color:var(--ink);
  margin:60px 0 18px;letter-spacing:-.005em;
}
.prose h2:first-child{margin-top:0}
.prose h3{font-family:'Noto Serif SC',serif;font-weight:500;font-size:19px;color:var(--ink);margin:32px 0 12px}
.prose p{color:var(--ink-soft);font-size:15.5px;line-height:1.85;margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 20px 24px;color:var(--ink-soft);font-size:15.5px;line-height:1.85}
.prose ul li,.prose ol li{margin-bottom:8px}
.prose strong{color:var(--ink);font-weight:600}
.prose a{color:var(--violet);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.prose .toc{
  padding:24px 28px;border-radius:var(--radius-md);background:#fff;border:1px solid var(--line);
  margin-bottom:48px;box-shadow:var(--shadow-sm);
}
.prose .toc h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:14px;font-weight:700}
.prose .toc ol{margin:0 0 0 20px;font-size:14.5px;line-height:1.9}
.prose .toc a{color:var(--ink-soft);text-decoration:none}
.prose .toc a:hover{color:var(--violet)}
.prose .callout{
  padding:20px 24px;border-radius:var(--radius-md);
  background:var(--grad-brand-soft);border:1px solid var(--line);
  margin:24px 0;font-size:14.5px;color:var(--ink);
}
.prose .callout strong{color:var(--ink)}
.prose .meta{font-size:13.5px;color:var(--ink-dim);margin-bottom:40px;padding-bottom:24px;border-bottom:1px solid var(--line)}