/* ============================================================
   幼十二 · 官网  |  结构层（不含任何颜色定义）
   颜色全部在 theme.css —— 换主题只替换 theme.css，本文件不动
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",-apple-system,"Segoe UI",sans-serif;
  font-size:16px; line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}   /* 🔴 height:auto 必须有：否则 width/height 属性会压过只限宽的 CSS */
svg{display:block}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding-left:1.15em}
a{text-decoration:none}
button{font:inherit;cursor:pointer}

.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;padding:10px 16px;z-index:200}
.skip:focus{left:14px;top:14px}

/* ---------------- 页头 ---------------- */
.site-header{position:sticky;top:0;z-index:90}
.header-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand-mark{display:block;flex:none}
.brand-text{display:block;font-size:20px;font-weight:700;letter-spacing:.06em;line-height:1.2}
.brand-text em{display:block;font-size:11px;font-style:normal;font-weight:400;letter-spacing:.14em;margin-top:3px}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0;flex-wrap:wrap}
.site-nav a{display:block;padding:9px 13px;font-size:14.5px;border-radius:5px;white-space:nowrap}
.site-nav .nav-cta{margin-left:8px}
.site-nav .nav-cta a{padding:10px 18px;font-weight:600}
.nav-toggle{display:none;margin-left:auto;width:42px;height:38px;border-radius:6px;padding:9px 10px}
.nav-toggle i{display:block;height:2px;margin:4px 0;border-radius:2px}

/* ---------------- 面包屑 ---------------- */
.crumbs{font-size:13px}
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:12px 0 0;margin:0}
.crumbs li+li::before{content:"›";margin-right:6px;opacity:.55}

/* ---------------- 通用区块 ---------------- */
.section{padding:62px 0}
.section.tight{padding:44px 0}
.sec-head{max-width:760px;margin-bottom:30px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;margin-bottom:10px}
h2.sec-title{font-size:29px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
.sec-desc{margin-top:12px;font-size:15.5px}
h3{font-size:19px;font-weight:700;line-height:1.45}
.lead{font-size:17px}

/* ---------------- Hero ---------------- */
.hero{padding:64px 0 56px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(30px,4.1vw,46px);line-height:1.28;font-weight:700;letter-spacing:-.02em}
.hero .h1-sub{display:block;font-size:clamp(15px,1.6vw,18px);font-weight:400;margin-top:16px;line-height:1.75;max-width:33em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-block;padding:13px 26px;border-radius:6px;font-size:15px;font-weight:600;border:1.5px solid transparent;transition:.18s}
.btn-ghost{background:transparent}
.hero-kpis{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.hero-kpis div{min-width:96px}
.hero-kpis b{display:block;font-size:25px;font-weight:700;line-height:1.2}
.hero-kpis span{display:block;font-size:12.5px;margin-top:2px}

/* 十二节律环（SVG 装饰，非图片，无需 alt） */
.hero-figure{margin:0;position:relative}
.hero-figure svg{width:100%;height:auto;max-width:430px;margin:0 auto}
.hero-cap{margin-top:14px;font-size:12.5px;text-align:center}

/* ---------------- 卡片 / 网格 ---------------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{padding:24px 22px;border-radius:9px;height:100%}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14px;line-height:1.75}
.card .idx{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.1em;margin-bottom:9px}

/* 四阶节律 */
.stage-list{display:grid;gap:16px}
.stage{display:grid;grid-template-columns:112px 1fr;gap:24px;padding:26px 26px;border-radius:9px;align-items:start}
.stage-badge{text-align:center;padding:14px 8px;border-radius:8px}
.stage-badge b{display:block;font-size:22px;font-weight:700;letter-spacing:.08em;line-height:1.25}
.stage-badge span{display:block;font-size:11.5px;margin-top:5px;letter-spacing:.1em}
.stage-body h3{font-size:19px;margin-bottom:4px}
.stage-method{font-size:12.5px;letter-spacing:.06em;margin-bottom:11px}
.stage-targets{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;list-style:none;padding:0}
.stage-targets li{font-size:12.5px;padding:4px 11px;border-radius:20px}
.stage-meta{margin-top:14px;font-size:13px}
.stage-meta dt{display:inline;font-weight:600}
.stage-meta dd{display:inline;margin:0 0 0 6px}
.stage-meta div{margin-top:5px}

/* 产品卡片 */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.prod{padding:21px 20px;border-radius:9px;display:flex;flex-direction:column}
.prod .p-cat{font-size:11.5px;font-weight:700;letter-spacing:.1em;margin-bottom:7px}
.prod h3{font-size:16.5px;margin-bottom:5px}
.prod .p-sub{font-size:12.5px;font-weight:600;margin-bottom:9px}
.prod .p-sum{font-size:13.5px;line-height:1.7;flex:1}
.prod .p-pat{margin-top:12px;padding-top:11px;font-size:11.5px;line-height:1.6}
.prod details{margin-top:11px;font-size:12.5px}
.prod summary{cursor:pointer;font-weight:600;padding:5px 0}
.prod details ul{padding-left:16px;margin:6px 0 0}
.prod details li{margin-bottom:3px;line-height:1.6}

.cat-tabs{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:26px}
.cat-tabs a{font-size:13.5px;padding:7px 15px;border-radius:20px}

/* 信任条 */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;border-radius:9px;overflow:hidden}
.trust div{padding:22px 18px;text-align:center}
.trust b{display:block;font-size:24px;font-weight:700;line-height:1.25}
.trust span{display:block;font-size:12.5px;margin-top:4px}

/* 时间轴 */
.timeline{list-style:none;padding:0;margin:0}
.timeline li{position:relative;padding:0 0 26px 30px}
.timeline li::before{content:"";position:absolute;left:4px;top:9px;width:9px;height:9px;border-radius:50%}
.timeline li::after{content:"";position:absolute;left:8px;top:20px;bottom:0;width:1px}
.timeline li:last-child::after{display:none}
.timeline .t-date{font-size:12.5px;font-weight:700;letter-spacing:.06em}
.timeline .t-title{font-size:15.5px;font-weight:700;margin-top:2px}
.timeline .t-body{font-size:13.5px;margin-top:4px}

/* FAQ 手风琴 */
.faq-group{margin-bottom:34px}
.faq-group > h3{margin-bottom:6px}
details.faq{border-radius:8px;margin-bottom:9px;overflow:hidden}
details.faq summary{
  padding:15px 46px 15px 18px;font-size:15px;font-weight:600;list-style:none;
  position:relative;cursor:pointer
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  font-size:19px;font-weight:400;line-height:1
}
details.faq[open] summary::after{content:"–"}
details.faq .a{padding:0 18px 17px;font-size:14px;line-height:1.85}

/* 媒体报道 */
.media-list{display:grid;gap:10px}
.media-item{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;padding:16px 18px;border-radius:8px}
.media-item h3{font-size:14.5px;font-weight:600;line-height:1.55}
.media-item .m-meta{font-size:12px;margin-top:5px}
.media-item .m-go{font-size:12.5px;font-weight:700;white-space:nowrap}

/* 资质 */
.honor-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}
.honor{padding:14px 16px;border-radius:8px;display:grid;grid-template-columns:auto 1fr;gap:13px;align-items:start}
.honor .h-no{font-size:11px;font-weight:700;padding:3px 8px;border-radius:4px;white-space:nowrap}
.honor h3{font-size:14px;font-weight:700;line-height:1.5}
.honor p{font-size:12px;margin-top:4px;line-height:1.6}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
.contact-card{padding:26px 24px;border-radius:9px}
.contact-card dl{margin:0}
.contact-card dt{font-size:12px;letter-spacing:.08em;font-weight:700;margin-top:16px}
.contact-card dt:first-child{margin-top:0}
.contact-card dd{margin:4px 0 0;font-size:15px;line-height:1.7}
.form-row{margin-bottom:15px}
.form-row label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.form-row input,.form-row select,.form-row textarea{
  width:100%;padding:11px 13px;font:inherit;font-size:14.5px;border-radius:6px;border:1px solid transparent
}
.form-row textarea{min-height:112px;resize:vertical}
.form-note{font-size:12px;margin-top:12px;line-height:1.7}
.form-ok{padding:13px 16px;border-radius:7px;font-size:14px;margin-bottom:18px}

/* 内容型长文（隐私政策） */
.prose{max-width:820px}
.prose h2{font-size:21px;font-weight:700;margin:34px 0 12px}
.prose h3{font-size:16.5px;margin:22px 0 8px}
.prose p{margin-bottom:12px;font-size:15px}
.prose ul{margin:0 0 14px;font-size:15px}
.prose li{margin-bottom:6px}

/* 待补标签 */
.tbd{
  display:inline-block;padding:1px 8px;border-radius:4px;font-size:12.5px;font-weight:700;
  background:#f7e9c8;color:#7a5a12;border:1px dashed #b98f2e;white-space:nowrap
}

/* CTA 带 */
.cta-band{padding:52px 0}
.cta-band .inner{display:grid;grid-template-columns:1fr auto;gap:34px;align-items:center;padding:38px 40px;border-radius:12px}
.cta-band h2{font-size:25px;font-weight:700;line-height:1.4}

/* 提示框 */
.note{padding:15px 18px;border-radius:8px;font-size:13.5px;line-height:1.78;margin:16px 0}
.note b{font-weight:700}

/* ---------------- 页脚 ---------------- */
.site-footer{padding:54px 0 26px;margin-top:10px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.2fr;gap:34px}
.f-brand .f-name{font-size:21px;font-weight:700;letter-spacing:.06em}
.f-brand .f-slogan{font-size:13.5px;margin-top:6px;letter-spacing:.04em}
.f-brand .f-desc{font-size:13px;margin-top:12px;line-height:1.8}
.f-h{font-size:12.5px;font-weight:700;letter-spacing:.12em;margin-bottom:13px}
.f-col ul{list-style:none;padding:0;margin:0}
.f-col li{font-size:13.5px;margin-bottom:9px;line-height:1.65}
.f-contact li{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:baseline}
.f-k{font-size:12px;opacity:.75;white-space:nowrap}
.f-v{font-size:13.5px}
.footer-base{margin-top:38px;padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}
.footer-base p{font-size:12px;line-height:1.75}
.f-links a{font-size:12px}
.f-links span{margin:0 6px;opacity:.5}

/* ---------------- 响应式 ---------------- */
@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-figure{order:-1}
  .hero-figure svg{max-width:330px}
  .g4,.trust{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band .inner{grid-template-columns:1fr;gap:20px}
}
@media (max-width:760px){
  body{font-size:15px}
  .wrap{padding:0 17px}
  .section{padding:46px 0}
  .hero{padding:38px 0 40px}
  h2.sec-title{font-size:23px}
  .nav-toggle{display:block}
  .site-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    padding:12px 17px 18px;box-shadow:0 10px 24px rgba(0,0,0,.12)
  }
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav a{padding:12px 10px;font-size:15px}
  .site-nav .nav-cta{margin-left:0;margin-top:8px}
  .site-nav .nav-cta a{text-align:center}
  .g2,.g3,.g4,.trust,.prod-grid,.honor-grid,.contact-grid{grid-template-columns:1fr}
  .stage{grid-template-columns:1fr;gap:15px;padding:21px 19px}
  .stage-badge{display:flex;align-items:center;justify-content:flex-start;gap:12px;padding:9px 13px}
  .stage-badge b{font-size:18px}
  .stage-badge span{margin:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-band .inner{padding:26px 21px}
  .cta-band h2{font-size:20px}
  .media-item{grid-template-columns:1fr;gap:7px}
  .hero-kpis{gap:20px}
  .hero-kpis b{font-size:21px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}