:root{
  --green:#107c41;
  --green-2:#0b5c2e;
  --green-soft:#dff6dd;
  --ink:#242424;
  --muted:#616161;
  --line:#edebe9;
  --bg:#fff;
  --hero:#f3f2f1;
  --tile:#ebebeb;
  --font:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  --max:1200px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
body[data-lang="zh"] .en{display:none!important}
body[data-lang="en"] .zh{display:none!important}
.ms-wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* header — 64px Fluent */
.ms-header{
  position:sticky;top:0;z-index:50;
  height:64px;background:#fff;
  border-bottom:1px solid var(--line);
}
.ms-header-inner{
  height:100%;max-width:100%;
  padding:0 16px;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.ms-header-left,.ms-header-right{display:flex;align-items:center;gap:4px;min-width:0}
.ms-app-menu,.ms-nav-btn,.ms-nav-link{
  display:inline-flex;align-items:center;gap:6px;
  height:32px;padding:0 10px;border-radius:4px;
  font-size:14px;color:var(--ink);white-space:nowrap;
}
.ms-app-menu{font-weight:600;padding-left:6px}
.ms-app-icon{width:24px;height:24px}
.ms-app-menu:hover,.ms-nav-btn:hover,.ms-nav-link:hover{background:#f5f5f5}
.chev{opacity:.7}
.lang-switch{
  height:28px;padding:0 10px;margin-right:6px;
  border:1px solid var(--line);border-radius:4px;
  font-size:12px;color:var(--muted);
}
.ms-signin{
  height:32px;padding:0 16px;border-radius:4px;
  background:var(--green);color:#fff;font-size:14px;font-weight:600;
}
.ms-signin:hover{background:var(--green-2)}

/* hero */
.ms-hero{
  position:relative;overflow:hidden;
  background:var(--hero);
  min-height:340px;
}
.ms-hero-bg{
  position:absolute;inset:0 0 0 38%;
  pointer-events:none;
}
.ms-hero-bg picture,.ms-hero-bg img{
  width:100%;height:100%;
  object-fit:cover;object-position:left center;
}
.ms-hero-inner{
  position:relative;z-index:1;
  max-width:var(--max);margin:0 auto;
  padding:64px 24px 56px;
}
.ms-hero-copy{max-width:520px}
.ms-hero-copy h1{
  margin:0 0 12px;
  font-size:36px;line-height:1.22;font-weight:600;
  color:var(--green);letter-spacing:-.01em;
}
.ms-hero-copy p{
  margin:0 0 22px;
  font-size:16px;line-height:1.5;color:var(--muted);
  max-width:34rem;
}
.ms-cta-card{
  display:inline-flex;flex-wrap:wrap;align-items:center;gap:10px;
  background:#fff;border-radius:8px;
  padding:10px;box-shadow:0 2px 8px rgba(0,0,0,.08),0 0 0 1px rgba(0,0,0,.04);
}
.ms-btn-primary,.ms-btn-secondary{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;border-radius:999px;
  font-size:14px;font-weight:600;white-space:nowrap;
}
.ms-btn-primary{background:var(--green);color:#fff}
.ms-btn-primary:hover{background:var(--green-2)}
.ms-plus{
  width:22px;height:22px;border-radius:50%;
  background:rgba(255,255,255,.22);
  display:grid;place-items:center;
}
.ms-btn-secondary{
  background:#fff;color:var(--ink);
  border:1px solid #8a8886;
}
.ms-btn-secondary:hover{background:#faf9f8}

/* templates */
.ms-templates{padding:40px 0 56px;background:#fff}
.ms-templates h2{
  margin:0 0 18px;font-size:24px;font-weight:600;color:var(--ink);
}
.ms-toolbar{
  display:flex;flex-wrap:wrap;gap:12px 16px;
  align-items:center;justify-content:space-between;
  margin-bottom:20px;
}
.ms-tabs{display:flex;flex-wrap:wrap;gap:4px}
.ms-tab{
  height:32px;padding:0 14px;border-radius:999px;
  font-size:14px;color:var(--muted);
}
.ms-tab.on{background:var(--green-soft);color:#0b5c2e;font-weight:600}
.ms-tab:hover{background:#f3f2f1;color:var(--ink)}
.ms-tab.on:hover{background:var(--green-soft);color:#0b5c2e}
.ms-search{
  display:inline-flex;align-items:center;gap:8px;
  height:32px;padding:0 12px;border-radius:4px;background:#f3f2f1;color:var(--muted);
  min-width:min(240px,70vw);
}
.ms-search input{
  flex:1;border:0;background:transparent;outline:none;
  font:inherit;font-size:14px;color:var(--muted);min-width:0;
}

/* masonry-like template grid matching unsigned/app home feel */
.ms-masonry{
  display:grid;
  grid-template-columns:repeat(6,minmax(0,1fr));
  grid-auto-rows:72px;
  grid-auto-flow:dense;
  gap:12px;
}
.tile{
  display:block;border-radius:4px;overflow:hidden;
  background:#ebebeb;min-width:0;height:100%;padding:0;border:0;
  transition:box-shadow .15s ease, transform .15s ease;
}
.tile-img{
  display:block;width:100%;height:100%;
  object-fit:cover;object-position:top center;
  border-radius:4px;
}
.tile:hover{
  box-shadow:0 6px 18px rgba(0,0,0,.12);
  transform:translateY(-1px);
}
.tile-cap{display:none!important}
/* spans to mimic official masonry */
.t-a{grid-column:span 1;grid-row:span 3}
.t-b{grid-column:span 1;grid-row:span 2}
.t-c{grid-column:span 1;grid-row:span 3}
.t-d{grid-column:span 1;grid-row:span 4}
.t-e{grid-column:span 1;grid-row:span 2}
.t-f{grid-column:span 1;grid-row:span 3}

/* feature zig-zag */
.ms-feature{padding:56px 0;background:#fff}
.ms-feature.alt{background:#faf9f8}
.ms-feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.ms-feature-copy h2{
  margin:0 0 12px;font-size:28px;font-weight:600;line-height:1.25;color:var(--ink);
}
.ms-feature-copy p{
  margin:0;font-size:16px;line-height:1.6;color:var(--muted);max-width:36rem;
}
.ms-feature-media{
  border-radius:8px;overflow:hidden;background:#f3f2f1;
  box-shadow:0 8px 24px rgba(0,0,0,.06);
}
.ms-feature-media img{width:100%;height:auto}

/* footer */
.ms-footer{
  border-top:1px solid var(--line);
  padding:20px 0 28px;background:#fff;
}
.ms-footer-inner{
  display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
}
.ms-footer-links{display:flex;flex-wrap:wrap;gap:16px}
.ms-footer-links button{font-size:12px;color:var(--muted)}
.ms-footer-links button:hover{color:var(--green);text-decoration:underline}
.ms-copy{font-size:12px;color:var(--muted)}

/* WA modal */
.wa-modal{position:fixed;inset:0;z-index:99999;display:flex;align-items:center;justify-content:center;padding:20px}
.wa-modal[hidden]{display:none!important}
.wa-backdrop{position:absolute;inset:0;background:rgba(15,23,32,.48);border:0}
.wa-modal-panel{position:relative;z-index:1;width:min(380px,100%);background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.22)}
.wa-close{position:absolute;top:8px;right:10px;z-index:2;width:32px;height:32px;border-radius:50%;font-size:1.4rem;line-height:1;color:#616161;background:#fff}
.wa-modal-panel iframe{display:block;width:100%;height:min(520px,78vh);border:0;background:#fff}

@media (max-width:1100px){
  .ms-masonry{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (max-width:900px){
  .ms-hero-copy h1{font-size:28px}
  .ms-hero-bg{inset:0;opacity:.28}
  .ms-nav-btn,.ms-nav-link{display:none}
  .ms-feature-row{grid-template-columns:1fr;gap:24px}
  .ms-feature.alt .ms-feature-media{order:-1}
  .ms-masonry{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:640px){
  .ms-hero-inner{padding:36px 16px 32px}
  .ms-cta-card{width:100%}
  .ms-btn-primary,.ms-btn-secondary{flex:1;justify-content:center}
  .ms-masonry{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:64px}
  .ms-feature-copy h2{font-size:22px}
}