/* ============================================================
   人齐软件 · Apple 风格（极简 / 国际化 / 留白 / 精密）
   ============================================================ */
:root{
  --bg:#ffffff;
  --bg-soft:#f5f5f5;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --ink-3:#86868b;
  --blue:#07C160;
  --blue-deep:#06AD56;
  --line:rgba(0,0,0,.08);
  --card:#ffffff;
  --shadow-sm:0 1px 3px rgba(0,0,0,.05),0 10px 30px rgba(0,0,0,.045);
  --shadow-md:0 2px 6px rgba(0,0,0,.06),0 18px 44px rgba(0,0,0,.07);
  --nav-h:52px;
  --ease:cubic-bezier(.16,1,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:clip}
body{
  margin:0;max-width:100%;overflow-x:clip;
  display:flex;flex-direction:column;min-height:100vh;
  color:var(--ink);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.5;letter-spacing:-.01em;
  padding-top:var(--nav-h);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  background:var(--bg);
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,figure,blockquote{margin:0}
ul{list-style:none;padding:0}
::selection{background:rgba(7,193,96,.18)}

main,footer{position:relative;z-index:1}
main{flex:1 0 auto;display:flex;flex-direction:column;justify-content:center}
.footer{flex:none}

/* ---------- 通用 ---------- */
.grad{color:var(--blue)}

/* ---------- 导航（毛玻璃） ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  height:var(--nav-h);
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid rgba(0,0,0,.06);
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.nav-inner{
  width:min(1240px,100%);margin:0 auto;height:100%;
  display:flex;align-items:center;gap:20px;
  padding:0 clamp(16px,3vw,28px);
}
.nav.scrolled{border-bottom-color:rgba(0,0,0,.1)}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:30px;height:30px;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-text{font-size:15px;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.brand-text i{font-style:normal;font-size:9px;letter-spacing:.12em;color:var(--ink-3);font-weight:500;margin-top:1px}

/* ---------- Hero ---------- */
.hero{
  position:relative;width:min(1240px,100%);margin:0 auto;
  padding:clamp(18px,3vw,44px) clamp(16px,3vw,28px) clamp(20px,3.4vw,52px);
  display:grid;grid-template-columns:1fr;text-align:center;
}
.hero h1{
  font-size:clamp(42px,6.4vw,82px);line-height:1.04;font-weight:700;letter-spacing:-.03em;
  margin:8px 0 18px;color:var(--ink);
}
.hero h1 .grad{color:var(--blue)}

/* ---------- 区块通用 ---------- */
.section{width:min(1240px,100%);margin:0 auto;padding:clamp(24px,4vw,56px) clamp(16px,3vw,28px)}
.section,#top{scroll-margin-top:calc(var(--nav-h) + 10px)}

/* ---------- 三种文化 · 闭环（浅灰槽 + 白卡） ---------- */
.loop-flow{
  display:grid;grid-template-columns:1fr auto 1fr auto 1fr;
  gap:clamp(12px,1.6vw,24px);align-items:stretch;
  background:var(--bg-soft);border-radius:30px;
  padding:clamp(22px,3vw,48px);
}
.lf-card{
  position:relative;padding:clamp(24px,2.6vw,38px);border-radius:22px;
  min-height:clamp(150px,15vh,200px);
  display:flex;flex-direction:column;justify-content:center;
  background:var(--card);border:1px solid rgba(0,0,0,.04);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.lf-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
/* ---------- 三种文化 · 含义演示动画 ---------- */
.lf-demo{
  width:100%;height:64px;border-radius:14px;background:#eaf8f0;
  display:grid;place-items:center;margin-bottom:18px;overflow:hidden;
}
.lf-demo svg{width:100%;height:100%;display:block}
.dm-axis{stroke:#07C160;stroke-opacity:.3;stroke-width:1.5;stroke-dasharray:3 4}
.dm-line{stroke:#07C160;stroke-width:2.5;stroke-linecap:round}
.dm-dot,.dm-core,.dm-gain{fill:#07C160}
.dm-node,.dm-ring{fill:#fff;stroke:#07C160;stroke-width:2.5}
.dm-link{stroke:#07C160;stroke-opacity:.5;stroke-width:2;stroke-linecap:round;stroke-dasharray:60}
.dm-wave{fill:none;stroke:#07C160;stroke-width:2;opacity:0}
.dm-core{transform-box:fill-box;transform-origin:center;animation:dmPulse 3s ease-in-out infinite}
@keyframes dmPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.14)}}

/* 共通：三条参差的工具线吸附到同一基准 —— 标准统一 */
.lf-demo--tong .a1{transform:translateX(-6px);animation:dmAlign1 3.4s ease-in-out infinite}
.lf-demo--tong .a2{transform:translateX(-14px);animation:dmAlign2 3.4s ease-in-out infinite}
.lf-demo--tong .a3{transform:translateX(2px);animation:dmAlign3 3.4s ease-in-out infinite}
@keyframes dmAlign1{0%,12%{transform:translateX(0);opacity:.4}42%,72%{transform:translateX(-6px);opacity:1}100%{transform:translateX(0);opacity:.4}}
@keyframes dmAlign2{0%,12%{transform:translateX(0);opacity:.4}42%,72%{transform:translateX(-14px);opacity:1}100%{transform:translateX(0);opacity:.4}}
@keyframes dmAlign3{0%,12%{transform:translateX(0);opacity:.4}42%,72%{transform:translateX(2px);opacity:1}100%{transform:translateX(0);opacity:.4}}

/* 共创：想法居中，参与者与连线依次加入 —— 众人共创 */
.lf-demo--chuang .dm-node{transform-box:fill-box;transform-origin:center;animation:dmJoin 3.6s ease-in-out infinite}
.lf-demo--chuang .dm-link{animation:dmDraw 3.6s ease-in-out infinite}
.lf-demo--chuang .n2,.lf-demo--chuang .l2{animation-delay:-1.2s}
.lf-demo--chuang .n3,.lf-demo--chuang .l3{animation-delay:-2.4s}
@keyframes dmJoin{0%,10%{opacity:0;transform:scale(.4)}38%,75%{opacity:1;transform:scale(1)}100%{opacity:0;transform:scale(.4)}}
@keyframes dmDraw{0%,10%{stroke-dashoffset:60;stroke-opacity:0}38%,75%{stroke-dashoffset:0;stroke-opacity:.5}100%{stroke-dashoffset:60;stroke-opacity:0}}

/* 共享：成果自中心扩散，参与者依次点亮 —— 成果共享 */
.lf-demo--xiang .dm-wave{transform-box:fill-box;transform-origin:center;animation:dmWave 3.2s ease-out infinite}
.lf-demo--xiang .w2{animation-delay:-1.05s}
.lf-demo--xiang .w3{animation-delay:-2.1s}
.lf-demo--xiang .dm-gain{animation:dmGain 3.2s ease-in-out infinite}
.lf-demo--xiang .g2{animation-delay:-1.05s}
.lf-demo--xiang .g3{animation-delay:-2.1s}
@keyframes dmWave{0%{transform:scale(1);opacity:.55}70%,100%{transform:scale(5.5);opacity:0}}
@keyframes dmGain{0%,15%{opacity:0}45%,78%{opacity:1}100%{opacity:0}}
/* 首个元素默认 0 延迟，与后两个负延迟错开，形成依次加入 / 依次点亮 */
.lf-demo--chuang .n1,.lf-demo--chuang .l1,.lf-demo--xiang .w1,.lf-demo--xiang .g1{animation-delay:0s}
.lf-card h3{font-size:21px;font-weight:600;letter-spacing:-.01em;margin-bottom:8px;color:var(--ink)}
.lf-card p{font-size:15px;line-height:1.55;color:var(--ink-2);letter-spacing:-.005em}
.lf-arrow{display:grid;justify-items:center;align-content:center;align-self:center;opacity:.45}
.lf-arrow svg{width:34px;height:12px;fill:none;stroke:rgba(0,0,0,.4);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 页脚 ---------- */
.footer{width:100%;border-top:1px solid var(--line);padding:clamp(22px,3vw,32px) clamp(16px,3vw,28px) clamp(24px,3vw,32px)}
.foot-inner{
  width:min(1240px,100%);margin:0 auto;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 24px;
}
.foot-brand{display:flex;flex-direction:column;gap:5px}
.foot-name{font-size:14px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.foot-tag{font-size:12px;color:var(--ink-3);letter-spacing:.01em}
.foot-meta{display:flex;flex-direction:column;align-items:flex-end;gap:5px;text-align:right}
.foot-mail{font-size:13px;font-weight:500;color:var(--ink-2);transition:color .2s var(--ease)}
.foot-mail:hover{color:var(--blue)}
.foot-copy{font-size:11px;color:var(--ink-3)}

/* ---------- 进场动画（模糊上浮，苹果缓动） ---------- */
.js .reveal{opacity:0;transform:translateY(26px);filter:blur(8px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1),filter .9s cubic-bezier(.16,1,.3,1)}
.js .reveal.in{opacity:1;transform:none;filter:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1000px){
  .loop-flow{grid-template-columns:1fr;gap:12px}
  .lf-arrow{display:none}
}
@media (max-width:760px){
  .hero h1{font-size:clamp(30px,8vw,40px)}
  .lf-card{min-height:0}
  .foot-inner{flex-direction:column;align-items:flex-start}
  .foot-meta{align-items:flex-start;text-align:left}
}

/* ---------- 矮屏 / 系统缩放 125% 紧凑模式 ---------- */
@media (max-height:1000px) and (min-width:861px){
  :root{--nav-h:48px}
  .hero{padding-top:8px}
  .hero h1{font-size:clamp(30px,4.4vw,58px);margin:6px 0 12px}
  .lf-card{padding:20px;min-height:0}
  .lf-card p{font-size:14px}
  .section{padding:8px clamp(16px,3vw,28px)}
}
@media (max-height:720px) and (min-width:861px){
  .hero{padding:6px clamp(16px,3vw,28px) 10px}
  .hero h1{font-size:clamp(26px,3.6vw,46px)}
  .section{padding-top:6px}
  .footer{padding-top:6px}
  .lf-card{padding:16px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal,.js .reveal{opacity:1!important;transform:none!important;filter:none!important}
}