:root{
  --excel:#107c41;
  --excel-dark:#0b5f32;
  --excel-soft:#e8f3ec;
  --line:#d0d7de;
  --grid:#e1e4e8;
  --text:#252423;
  --muted:#605e5c;
  --panel:#fff;
  --bg:#f3f2f1;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Segoe UI","Malgun Gothic",Arial,sans-serif;
  font-size:15px;
  line-height:1.62;
}
a{color:inherit}
.excel-topbar{
  position:sticky;
  top:0;
  z-index:10;
  height:42px;
  background:var(--excel);
  color:#fff;
  display:flex;
  align-items:center;
  gap:14px;
  padding:0 18px;
  box-shadow:0 1px 0 rgba(0,0,0,.12);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-width:0;
  text-decoration:none;
  font-weight:600;
}
.brand img{width:24px;height:24px;filter:drop-shadow(0 1px 1px rgba(0,0,0,.18))}
.doc-name{
  min-width:0;
  flex:1;
  text-align:center;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  font-size:14px;
  opacity:.96;
}
.open-sheet{
  height:26px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 10px;
  border:1px solid rgba(255,255,255,.52);
  border-radius:4px;
  color:#fff;
  text-decoration:none;
  font-size:12px;
  white-space:nowrap;
}
.open-sheet:hover{background:rgba(255,255,255,.12)}
.guide-ribbon{
  position:sticky;
  top:42px;
  z-index:9;
  height:38px;
  display:flex;
  align-items:center;
  gap:4px;
  padding:0 18px;
  background:#fff;
  border-bottom:1px solid var(--line);
  overflow:auto;
  white-space:nowrap;
}
.guide-ribbon a{
  height:28px;
  display:inline-flex;
  align-items:center;
  padding:0 10px;
  border-radius:4px;
  text-decoration:none;
  font-size:13px;
  color:#323130;
}
.guide-ribbon a:hover{background:var(--excel-soft);color:var(--excel-dark)}
main{overflow:hidden}
.hero-section,.feature-section,.recent-section,.hidden-section,.device-section,.wide-section{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto;
}
.hero-section{
  display:grid;
  grid-template-columns:minmax(260px,.72fr) minmax(420px,1fr);
  gap:28px;
  align-items:center;
  padding:44px 0 34px;
}
.hero-copy h1,.section-copy h2,.section-heading h2{
  margin:4px 0 12px;
  line-height:1.22;
  letter-spacing:0;
  color:#1f1f1f;
}
.hero-copy h1{font-size:34px}
.section-copy h2,.section-heading h2{font-size:25px}
.hero-copy p,.section-copy p,.release-grid p,.hidden-list p{
  margin:0;
  color:#484644;
}
.eyebrow{
  margin:0;
  color:var(--excel-dark);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.hero-actions{
  display:flex;
  gap:8px;
  margin-top:22px;
  flex-wrap:wrap;
}
.primary-action,.secondary-action{
  height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 13px;
  border-radius:4px;
  text-decoration:none;
  font-weight:600;
  font-size:13px;
}
.primary-action{background:var(--excel);color:#fff;border:1px solid var(--excel)}
.primary-action:hover{background:var(--excel-dark)}
.secondary-action{background:#fff;color:#185c37;border:1px solid #bfd4c6}
.secondary-action:hover{background:#f8fbf9}
.hero-shot,.feature-shot{
  margin:0;
  overflow:hidden;
  border:1px solid #cfd8d3;
  border-radius:8px;
  background:#fff;
  box-shadow:0 10px 28px rgba(0,0,0,.11);
}
.hero-shot img,.feature-shot img{
  display:block;
  width:100%;
  height:auto;
  background:#fff;
}
.hero-shot figcaption,.feature-shot figcaption{
  padding:8px 10px;
  border-top:1px solid var(--grid);
  color:var(--muted);
  font-size:12px;
  background:#fafafa;
}
.quick-grid{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto 28px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border:1px solid var(--line);
  border-right:0;
  background:#fff;
}
.quick-grid article{
  min-height:138px;
  padding:18px 16px;
  border-right:1px solid var(--line);
}
.quick-grid span{
  display:block;
  color:#707070;
  font-size:12px;
  font-variant-numeric:tabular-nums;
}
.quick-grid h2{
  margin:8px 0 7px;
  font-size:16px;
  line-height:1.35;
}
.quick-grid p{
  margin:0;
  color:#5a5755;
  font-size:13px;
}
.feature-section{
  display:grid;
  grid-template-columns:minmax(280px,.86fr) minmax(420px,1fr);
  gap:28px;
  align-items:center;
  padding:44px 0;
  border-top:1px solid #dde3df;
}
.feature-section.flip{grid-template-columns:minmax(420px,1fr) minmax(280px,.86fr)}
.feature-section.flip .section-copy{grid-column:2}
.feature-section.flip .feature-shot{grid-column:1;grid-row:1}
.check-list{
  margin:16px 0 0;
  padding:0;
  list-style:none;
  display:grid;
  gap:8px;
}
.check-list li{
  position:relative;
  padding-left:18px;
  color:#3f3d3b;
  font-size:14px;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:7px;
  border-radius:50%;
  background:#21a366;
}
.tip-box{
  margin-top:18px;
  padding:13px 14px;
  border:1px solid #bfd4c6;
  border-left:3px solid var(--excel);
  border-radius:6px;
  background:#f8fbf9;
}
.tip-box strong{display:block;margin-bottom:4px;color:#185c37}
.note-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:8px;
  margin-top:18px;
}
.note-grid div{
  min-height:78px;
  padding:12px;
  border:1px solid #d8e3dc;
  border-radius:6px;
  background:#fff;
}
.note-grid strong{
  display:block;
  margin-bottom:4px;
  color:#185c37;
  font-size:13px;
}
.note-grid span{
  display:block;
  color:#5a5755;
  font-size:12.5px;
  line-height:1.45;
}
.recent-section,.hidden-section,.device-section,.wide-section{
  padding:44px 0;
  border-top:1px solid #dde3df;
}
.section-heading{margin-bottom:18px}
.section-heading p:not(.eyebrow){
  margin:0;
  max-width:720px;
  color:#484644;
}
.release-grid,.hidden-list{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
}
.hidden-list{grid-template-columns:repeat(3,minmax(0,1fr))}
.release-grid article,.hidden-list article{
  min-height:160px;
  padding:16px;
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
}
.release-grid h3,.hidden-list h3{
  margin:0 0 8px;
  font-size:16px;
  line-height:1.35;
  color:#185c37;
}
.release-grid p,.hidden-list p{font-size:13.5px}
.device-grid{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(260px,.55fr);
  gap:16px;
  align-items:start;
}
.phone-shot{
  max-width:390px;
  justify-self:center;
}
.wide-shot{
  margin-top:16px;
}
.guide-footer{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto;
  padding:22px 0 34px;
  border-top:1px solid #dde3df;
  display:flex;
  gap:14px;
  color:#5f5d5a;
  font-size:13px;
}
.guide-footer span{font-weight:700;color:#185c37}
.guide-footer a{text-decoration:none;color:#3c6f50}
.guide-footer a:hover{text-decoration:underline}

@media(max-width:980px){
  .hero-section,.feature-section,.feature-section.flip{
    grid-template-columns:1fr;
  }
  .feature-section.flip .section-copy,
  .feature-section.flip .feature-shot{
    grid-column:auto;
    grid-row:auto;
  }
  .quick-grid,.release-grid,.hidden-list{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .device-grid{
    grid-template-columns:1fr;
  }
}
@media(max-width:620px){
  body{font-size:14px}
  .excel-topbar{height:40px;padding:0 10px;gap:8px}
  .brand span{display:none}
  .doc-name{text-align:left;font-size:13px}
  .guide-ribbon{top:40px;height:36px;padding:0 8px}
  .guide-ribbon a{font-size:12.5px;padding:0 8px}
  .hero-section,.feature-section,.recent-section,.hidden-section,.device-section,.wide-section,.guide-footer{
    width:calc(100% - 18px);
  }
  .hero-section{padding:28px 0 22px;gap:18px}
  .hero-copy h1{font-size:26px}
  .section-copy h2,.section-heading h2{font-size:21px}
  .quick-grid{
    width:calc(100% - 18px);
    grid-template-columns:1fr;
    border-right:1px solid var(--line);
  }
  .quick-grid article{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}
  .quick-grid article:last-child{border-bottom:0}
  .release-grid,.hidden-list,.note-grid{grid-template-columns:1fr}
  .release-grid article,.hidden-list article{min-height:auto}
  .hero-shot,.feature-shot{border-radius:6px}
  .phone-shot{max-width:100%}
  .guide-footer{flex-wrap:wrap;padding-bottom:24px}
}