/* Serena Help — same visual language as the guide PDF and the case pages:
   cream paper, coral accents, navy serif headings, the SERENA wordmark. */
:root{
  --paper:#fbf6ef;--card:#fffdfa;--ink:#1f2a44;--text:#3d3a36;--muted:#7a716a;
  --coral:#e9674f;--coral-dk:#d4553e;--blush:#fbe8e2;--line:#f1dcd3;--sky:#eaf3f8;
  --serif:"Noto Serif TC","Songti TC",serif;--sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:16px/1.8 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--coral-dk)}
img{max-width:100%;height:auto}

.wrap{max-width:760px;margin:0 auto;padding-inline:16px}

/* header */
.top{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-block:12px}
.brand{font-family:var(--serif);font-weight:600;letter-spacing:.42em;font-size:15px;color:var(--ink);text-decoration:none}
.brand small{letter-spacing:.08em;color:var(--coral);font-size:12px;margin-left:2px}
nav{display:flex;gap:4px 16px;flex-wrap:wrap}
nav a{color:var(--muted);text-decoration:none;font-size:14px;padding:2px 0;border-bottom:2px solid transparent}
nav a:hover,nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--coral)}

main{padding-block:32px 56px}
.kicker{display:inline-block;font-size:13px;font-weight:700;color:var(--coral);background:var(--blush);padding:3px 12px;border-radius:999px;margin-bottom:10px;letter-spacing:.04em}
h1,h2,h3{font-family:var(--serif);color:var(--ink);text-wrap:balance}
h1{font-weight:900;font-size:clamp(28px,6vw,40px);line-height:1.3;margin:0 0 12px;letter-spacing:.02em}
h1 em,h2 em{font-style:normal;color:var(--coral)}
h2{font-weight:900;font-size:24px;line-height:1.4;margin:44px 0 14px}
h3{font-weight:600;font-size:18px;margin:0 0 6px}
p{margin:0 0 14px;max-width:38em}
.lead{color:var(--muted);font-size:17px}

.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center}
.hero img{border-radius:22px;box-shadow:0 10px 30px rgba(233,103,79,.14)}
@media (max-width:640px){.hero{grid-template-columns:1fr}.hero img{order:-1}}

.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px 20px;box-shadow:0 6px 22px rgba(31,42,68,.05)}
.card p:last-child{margin-bottom:0}
.note{background:var(--sky);border:0;box-shadow:none}

.steps{list-style:none;padding:0;margin:0;display:grid;gap:14px;counter-reset:s}
.steps li{counter-increment:s;display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start}
.steps li:before{content:counter(s);width:40px;height:40px;border-radius:50%;background:var(--coral);color:#fff;
  font:700 17px/40px var(--sans);text-align:center}
.steps p{margin:0;color:var(--muted)}

.points{list-style:none;padding:0;margin:0}
.points li{position:relative;padding:0 0 10px 30px}
.points li:before{content:"✓";position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;background:var(--blush);
  color:var(--coral);font-size:12px;font-weight:700;display:grid;place-items:center}

.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}

.btn{display:inline-block;padding:13px 26px;font:700 17px/1.3 var(--sans);text-decoration:none;border-radius:999px;
  background:var(--coral);color:#fff;box-shadow:0 6px 16px rgba(233,103,79,.32)}
.btn:hover{background:var(--coral-dk)}
.btn.ghost{background:transparent;color:var(--coral-dk);box-shadow:inset 0 0 0 1.5px var(--coral)}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.fine{font-size:13px;color:var(--muted)}

details{border-bottom:1px solid var(--line);padding:14px 0}
details summary{cursor:pointer;font-weight:700;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:12px}
details summary::-webkit-details-marker{display:none}
details summary:after{content:"+";color:var(--coral);font-weight:700}
details[open] summary:after{content:"−"}
details p{margin:10px 0 0;color:var(--text)}

.legal h2{font-size:19px;margin-top:30px}
.legal li{margin-bottom:6px}

.sign{font-family:var(--serif);color:var(--coral);font-size:15px;margin-top:30px}

footer{border-top:1px solid var(--line);padding-block:24px 40px;font-size:13px;color:var(--muted);line-height:1.7}
footer nav{margin-bottom:10px}
footer nav a{font-size:13px}