/* ============================================================
   菲与乐心（FeiHappy）官网样式 · 升级版
   ============================================================ */
:root{
  --c-grad-1:#667EEA;
  --c-grad-2:#00C6FB;
  --grad:linear-gradient(135deg,var(--c-grad-1),var(--c-grad-2));
  --ink:#1a2a4a;
  --ink-2:#5a6a85;
  --ink-3:#9aa6bd;
  --bg:#FFFFFF;
  --bg-tint:#F5F7FF;
  --dark:#16223e;
  --line:#C9D4F5;
  --radius:14px;
  --radius-lg:18px;
  --shadow-sm:0 6px 24px rgba(26,42,74,.06);
  --shadow-lg:0 16px 40px rgba(102,126,234,.18);
  --maxw:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.container-narrow{max-width:760px}

/* ===== 文本工具 ===== */
.eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;margin:0 0 16px;text-transform:uppercase}
.eyebrow-light{color:rgba(255,255,255,.92)}
.eyebrow-accent{color:var(--c-grad-1)}
.section-title{font-size:clamp(24px,4vw,34px);font-weight:800;letter-spacing:1px;margin:0 0 16px;color:var(--ink)}
.section-text{font-size:16px;color:var(--ink-2);max-width:620px;margin:0 auto;line-height:1.85}
.text-light{color:#fff}
.text-light-soft{color:rgba(255,255,255,.85)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s,box-shadow .2s,background .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 8px 24px rgba(0,0,0,.14)}
.btn-outline-white{border-color:rgba(255,255,255,.6);color:#fff}
.btn-outline-white:hover{background:rgba(255,255,255,.14)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(102,126,234,.42)}

/* ===== 顶部导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 24px;
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid rgba(26,42,74,.06);
  transition:padding .25s,box-shadow .25s,background .25s;
}
.nav.scrolled{padding:9px 24px;box-shadow:0 4px 20px rgba(26,42,74,.08);background:rgba(255,255,255,.94)}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:2px;color:var(--ink)}
.logo-mark{display:inline-flex;width:38px;height:38px;animation:float 5s ease-in-out infinite}
.logo-mark-sm{width:40px;height:40px}
.logo-mark svg{width:100%;height:100%;display:block}
.nav-name{font-size:18px}
.nav-links{display:flex;gap:30px}
.nav-links a{font-size:14.5px;font-weight:600;color:var(--ink-2);transition:color .2s;position:relative}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:width .25s;border-radius:2px}
.nav-links a:hover{color:var(--c-grad-1)}
.nav-links a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ===== Hero 首屏 ===== */
.hero{
  position:relative;overflow:hidden;background:var(--grad);color:#fff;text-align:center;
  padding:120px 24px 110px;min-height:92vh;
  display:flex;align-items:center;justify-content:center;
}
.hero-bg{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.grid-overlay{
  position:absolute;inset:-2px;
  background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(ellipse 72% 62% at 50% 38%,#000 30%,transparent 76%);
  mask-image:radial-gradient(ellipse 72% 62% at 50% 38%,#000 30%,transparent 76%);
  opacity:.7;
}
.blob{position:absolute;border-radius:50%;filter:blur(2px)}
.blob-1{width:380px;height:380px;right:-90px;top:-110px;background:rgba(255,255,255,.16);animation:float 9s ease-in-out infinite}
.blob-2{width:260px;height:260px;left:-70px;bottom:-90px;background:rgba(255,255,255,.10);animation:float 11s ease-in-out infinite reverse}
.blob-3{width:160px;height:160px;right:18%;bottom:10%;background:rgba(255,255,255,.09);animation:float 7s ease-in-out infinite}
.hero-tern{position:absolute;width:120px;height:96px;right:12%;top:18%;opacity:.7;animation:ternFly 14s ease-in-out infinite}
.hero-inner{position:relative;max-width:840px;margin:0 auto}
.hero-title{font-size:clamp(34px,7vw,60px);font-weight:800;letter-spacing:1px;line-height:1.25;margin:0 0 18px}
.hero-sub{font-size:16px;opacity:.92;margin:0 0 34px;line-height:1.85}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.scroll-hint{
  position:absolute;bottom:24px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  color:rgba(255,255,255,.85);font-size:11px;letter-spacing:1px;
}
.scroll-mouse{width:22px;height:34px;border:2px solid rgba(255,255,255,.6);border-radius:12px;display:flex;justify-content:center;padding-top:6px}
.scroll-dot{width:3px;height:7px;background:#fff;border-radius:2px;animation:scrollDot 1.6s ease-in-out infinite}

/* ===== 通用板块 ===== */
.section{padding:96px 0;text-align:center;position:relative}
.section-tint{background:var(--bg-tint)}
.section-mission{padding:110px 0}
.section-head{text-align:center;max-width:660px;margin:0 auto 52px}

/* ===== 使命 ===== */
.big-quote{
  font-size:clamp(24px,4.5vw,40px);font-weight:800;line-height:1.5;
  color:var(--ink);margin:0 0 28px;letter-spacing:1px;
}

/* ===== 品牌精神 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:980px;margin:0 auto}
.feature{
  background:#fff;border-radius:var(--radius-lg);padding:40px 28px;
  box-shadow:var(--shadow-sm);border:1px solid rgba(26,42,74,.04);
  transition:transform .3s,box-shadow .3s;
}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.feature-icon{
  width:54px;height:54px;border-radius:14px;background:var(--bg-tint);
  display:flex;align-items:center;justify-content:center;margin:0 auto 18px;
}
.feature-icon svg{width:30px;height:30px}
.feature h3{font-size:19px;font-weight:700;margin:0 0 8px;color:var(--ink)}
.feature p{font-size:14.5px;color:var(--ink-2);margin:0;line-height:1.75}

/* ===== 价值观 ===== */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:1080px;margin:0 auto}
.value-card{
  padding:34px 22px;border-radius:16px;background:#fff;
  border:1px solid rgba(26,42,74,.06);transition:transform .3s,box-shadow .3s;
}
.value-card:hover{transform:translateY(-5px);box-shadow:0 14px 34px rgba(102,126,234,.15)}
.value-icon{
  width:48px;height:48px;display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;border-radius:12px;background:linear-gradient(135deg,rgba(102,126,234,.12),rgba(0,198,251,.12));
}
.value-icon svg{width:26px;height:26px}
.value-card h3{font-size:17px;font-weight:700;margin:0 0 8px;color:var(--ink)}
.value-card p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.7}

/* ===== 产品（敬请期待）===== */
.cards-soon{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;max-width:680px;margin:0 auto}
.card-soon{
  background:#fff;border:1.5px dashed var(--line);border-radius:var(--radius-lg);
  padding:46px 24px;transition:transform .3s,box-shadow .3s;
}
.card-soon:hover{transform:translateY(-5px);box-shadow:0 14px 34px rgba(102,126,234,.16)}
.card-soon-icon{width:56px;height:56px;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:var(--bg-tint)}
.card-soon-icon svg{width:30px;height:30px}
.card-title{font-size:18px;font-weight:700;margin:0 0 6px;color:var(--ink)}
.card-soon-label{font-size:13px;color:var(--ink-3);margin:0}

/* ===== 加入我们 ===== */
.careers-box{
  background:linear-gradient(135deg,var(--bg-tint),#fff);
  border:1px solid rgba(102,126,234,.12);border-radius:24px;
  padding:56px 36px;box-shadow:0 10px 40px rgba(26,42,74,.06);
}

/* ===== 联系我们 ===== */
.section-contact{background:var(--grad);color:#fff;text-align:center;overflow:hidden;position:relative;padding:100px 0}
.contact-inner{position:relative;z-index:1}
.contact-email-light{
  display:inline-flex;align-items:center;gap:10px;margin-top:28px;
  font-size:19px;font-weight:700;color:var(--ink);background:#fff;
  padding:14px 28px;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.15);
  transition:transform .2s,box-shadow .2s;
}
.contact-email-light:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,0,0,.22)}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:var(--ink-3);padding:42px 0 34px}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:20px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-name{margin:0;font-weight:800;color:#fff;letter-spacing:1px;font-size:16px}
.footer-sub{margin:2px 0 0;font-size:13px;color:var(--ink-3)}
.footer-meta{margin:0;font-size:13px}
.beian{color:#7a85a0;transition:color .2s}
.beian:hover{color:#fff}

/* ===== 动效 ===== */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes ternFly{0%,100%{transform:translate(0,0) rotate(-4deg)}50%{transform:translate(-18px,14px) rotate(3deg)}}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0)}40%{opacity:1}80%{opacity:0;transform:translateY(10px)}100%{opacity:0}}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
/* 错开淡入 */
.feature:nth-child(2){transition-delay:.1s}
.feature:nth-child(3){transition-delay:.2s}
.value-card:nth-child(2){transition-delay:.08s}
.value-card:nth-child(3){transition-delay:.16s}
.value-card:nth-child(4){transition-delay:.24s}
.card-soon:nth-child(2){transition-delay:.1s}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .feature-grid{grid-template-columns:1fr;max-width:520px}
  .value-grid{grid-template-columns:repeat(2,1fr);max-width:560px}
}
@media (max-width:760px){
  .nav-links{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid rgba(26,42,74,.06);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav-links.open{max-height:300px}
  .nav-links a{padding:15px 24px;border-top:1px solid rgba(26,42,74,.05)}
  .nav-links a::after{display:none}
  .nav-toggle{display:flex}
  .section{padding:68px 0}
  .section-mission{padding:80px 0}
  .cards-soon,.value-grid{grid-template-columns:1fr;max-width:420px}
  .hero{min-height:auto;padding:96px 24px 80px}
  .hero-tern{width:80px;height:64px;right:6%;top:10%}
  .scroll-hint{display:none}
  .careers-box{padding:40px 22px}
}
@media (max-width:420px){
  .hero-tern{display:none}
}

/* ===== 降低动效偏好 ===== */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}