/* ============================================================
   Sprout — product manual
   ============================================================ */

:root{
  --paper:#faf8f4;
  --card:#ffffff;
  --ink:#17161a;
  --muted:#6f6a64;
  --line:rgba(23,22,26,.12);
  --coral:#e5532c;
  --green:#5aa86a;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Inter","SF Pro Text",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.72;
  -webkit-font-smoothing:antialiased;
}
html[data-lang="zh"] body{font-family:-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Songti SC","Noto Serif SC",serif;font-weight:600;letter-spacing:-.01em}

/* ── nav ── */
.mnav{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.75rem clamp(1rem,4vw,2.4rem);
  background:rgba(250,248,244,.86);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.back{display:inline-flex;align-items:center;gap:.35rem;font-size:.86rem;color:var(--muted);transition:color .25s}
.back:hover{color:var(--ink)}
.mnav-mid{display:flex;align-items:center;gap:.5rem;font-size:.9rem;letter-spacing:.01em;color:var(--muted)}
.mnav-mid .mark{width:18px;height:18px}
.mnav-right{display:flex;align-items:center;gap:.5rem}
.lang-btn{
  border:1px solid var(--line);border-radius:999px;padding:.35rem .7rem;font-size:.74rem;letter-spacing:.05em;
  background:none;cursor:pointer;color:var(--muted);font-family:inherit;transition:.25s;
}
.lang-btn:hover{color:var(--ink);border-color:rgba(23,22,26,.3)}
.lang-btn .lang-zh{display:none}
html[data-lang="zh"] .lang-btn .lang-en{display:none}
html[data-lang="zh"] .lang-btn .lang-zh{display:inline}
.print-btn{
  border:1px solid var(--line);border-radius:999px;padding:.35rem .85rem;font-size:.74rem;
  background:#fff;cursor:pointer;color:var(--ink);font-family:inherit;transition:.25s;
}
.print-btn:hover{border-color:rgba(23,22,26,.3);transform:translateY(-1px)}

.doc{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1rem,4vw,2.4rem) 5rem}

/* ── cover ── */
.cover{
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.5rem,4vw,3.5rem);
  align-items:center;padding:clamp(2.5rem,6vw,5rem) 0 clamp(2rem,5vw,3.5rem);
  border-bottom:1px solid var(--line);
}
.eyebrow{
  font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--coral);
  margin:0 0 1.2rem;font-weight:600;
}
.cover h1{font-size:clamp(3.4rem,7vw,5.6rem);line-height:.95;margin:0 0 1rem;letter-spacing:-.035em}
.dek{font-size:1.06rem;color:var(--muted);max-width:34ch;margin:0 0 1.3rem}
.cover-note{font-size:.86rem;color:#8a8480;max-width:44ch;padding-left:.9rem;border-left:2px solid var(--coral)}
.cover-meta{display:flex;gap:2rem;margin-top:2.2rem;flex-wrap:wrap}
.cover-meta div{display:flex;flex-direction:column;gap:.1rem}
.cover-meta span{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:#8a8480}
.cover-meta b{font-size:.95rem;font-weight:600}
.cover-fig{margin:0;position:relative}
.cover-fig::before{
  content:"";position:absolute;inset:12% 6% 8%;border-radius:50%;
  background:radial-gradient(circle,rgba(229,83,44,.18),transparent 65%);filter:blur(30px);z-index:-1;
}
.cover-fig img{border-radius:24px;box-shadow:0 30px 70px -34px rgba(30,24,20,.5)}

/* ── body grid ── */
.body-grid{display:grid;grid-template-columns:200px 1fr;gap:clamp(1.5rem,4vw,3.5rem);padding-top:clamp(2rem,4vw,3rem)}
.toc{position:sticky;top:92px;align-self:start;font-size:.86rem}
.toc-title{font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:#8a8480;margin:0 0 .9rem;font-weight:600}
.toc ol{list-style:none;padding:0;margin:0;counter-reset:toc}
.toc li{counter-increment:toc;margin-bottom:.1rem}
.toc a{
  display:block;padding:.38rem 0 .38rem 1.9rem;color:var(--muted);border-left:1px solid var(--line);
  text-decoration:none;position:relative;transition:color .25s,border-color .25s,padding .25s;
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);position:absolute;left:.5rem;font-size:.7rem;
  color:#b0aaa3;letter-spacing:.02em;font-variant-numeric:tabular-nums;
}
.toc a:hover{color:var(--ink)}
.toc a.on{color:var(--ink);border-left-color:var(--coral);font-weight:600}
.toc a.on::before{color:var(--coral)}

/* ── content ── */
.content section{padding-bottom:clamp(2.2rem,4vw,3.2rem);margin-bottom:clamp(1.6rem,3vw,2.4rem);border-bottom:1px solid var(--line)}
.content section:last-of-type{border-bottom:0}
.content h2{
  display:flex;align-items:baseline;gap:.8rem;font-size:clamp(1.5rem,2.4vw,1.95rem);
  margin:0 0 1.2rem;letter-spacing:-.02em;
}
.content h2 .num{
  font-family:"Inter",-apple-system,sans-serif;font-size:.72rem;font-weight:600;letter-spacing:.08em;
  color:var(--coral);border:1px solid rgba(229,83,44,.3);border-radius:6px;padding:.12rem .38rem;
}
.content p{color:#3f3c39;max-width:62ch;margin:0 0 1rem}
.note{font-size:.86rem;color:#8a8480;background:#f3efe8;border-radius:10px;padding:.7rem .9rem;max-width:60ch}
.bullets{margin:0 0 1rem;padding-left:1.1rem;color:#3f3c39}
.bullets li{margin-bottom:.45rem}

/* box list */
.boxlist{list-style:none;padding:0;margin:0 0 1rem;display:grid;gap:.6rem;max-width:60ch}
.boxlist li{
  display:grid;grid-template-columns:190px 1fr;gap:1rem;align-items:baseline;
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.85rem 1rem;
}
.boxlist b{font-weight:600;font-size:.95rem}
.boxlist span{font-size:.88rem;color:var(--muted)}

/* figures */
.figure-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:0 0 1.5rem}
.figure-row figure{margin:0;text-align:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:.8rem}
.figure-row img{margin:0 auto .5rem;max-height:160px;width:auto}
.figure-row figcaption{font-size:.76rem;color:var(--muted)}

/* callouts */
.callouts{margin:0;display:grid;gap:.55rem}
.callouts > div{display:grid;grid-template-columns:150px 1fr;gap:1rem;padding:.55rem 0;border-top:1px dashed var(--line)}
.callouts dt{font-size:.9rem;font-weight:600}
.callouts dd{margin:0;font-size:.9rem;color:var(--muted)}

/* steps */
.steps{list-style:none;counter-reset:step;padding:0;margin:0;display:grid;gap:.8rem}
.steps li{
  counter-increment:step;position:relative;padding:1rem 1.1rem 1rem 3.4rem;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
}
.steps li::before{
  content:counter(step);position:absolute;left:1rem;top:1rem;width:1.7rem;height:1.7rem;border-radius:50%;
  background:var(--ink);color:#fff;font-size:.78rem;display:grid;place-items:center;font-weight:600;
}
.steps b{display:block;font-size:.98rem;margin-bottom:.25rem}
.steps p{margin:0;font-size:.9rem;color:var(--muted);max-width:none}

/* tables */
.tbl{width:100%;border-collapse:collapse;margin:0 0 1rem;font-size:.9rem;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:.75rem .95rem;border-bottom:1px solid var(--line);vertical-align:top}
.tbl thead th{
  font-family:"Inter",sans-serif;font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
  color:#8a8480;font-weight:600;background:#f4f0e9;
}
.tbl tbody tr:last-child td{border-bottom:0}
.tbl tbody tr:hover{background:#fbf9f5}
.tbl td:first-child{font-weight:550;white-space:nowrap}
.specs th{
  font-family:"Inter",sans-serif;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:#8a8480;font-weight:600;width:34%;border-bottom:1px solid var(--line);vertical-align:middle;
}
.specs td{border-bottom:1px solid var(--line);color:#3f3c39}
.states td:first-child{white-space:nowrap}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:.45rem;vertical-align:middle}
.dot.white{background:#fff;box-shadow:0 0 0 1px #cfc9c2}
.dot.blue{background:#4f8dff}
.dot.cyan{background:#39c7d6}
.dot.amber{background:#f0b73f}
.dot.green{background:#5aa86a}
.dot.red{background:#e5532c}

/* app list */
.applist{list-style:none;padding:0;margin:1rem 0 0;display:grid;grid-template-columns:1fr 1fr;gap:.6rem}
.applist li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.8rem .95rem}
.applist b{display:block;font-size:.93rem;margin-bottom:.15rem}
.applist span{font-size:.85rem;color:var(--muted)}

/* warnings */
.warn{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.warn p{
  margin:0;background:#fffdf9;border:1px solid rgba(229,83,44,.2);border-left:3px solid var(--coral);
  border-radius:10px;padding:.8rem .95rem;font-size:.88rem;
}
.warn b{display:block;margin-bottom:.2rem;font-size:.93rem}
.warn span{color:var(--muted)}

.warranty{background:#0f1013;color:#f2ede8;border-radius:16px;padding:1.2rem 1.35rem;margin:1.2rem 0;max-width:62ch}
.warranty b{font-size:1rem;display:block;margin-bottom:.35rem}
.warranty p{margin:0;color:#b6afa8;font-size:.9rem}
.contact{font-size:.84rem;color:#8a8480}

.doc-foot{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding-top:1.4rem;border-top:1px solid var(--line);font-size:.76rem;color:#8a8480;
}

/* ── responsive ── */
@media (max-width:900px){
  .cover{grid-template-columns:1fr}
  .cover-fig{order:-1;max-width:340px;margin-inline:auto}
  .body-grid{grid-template-columns:1fr}
  .toc{position:static;order:-1;border:1px solid var(--line);border-radius:14px;padding:1rem;background:var(--card)}
  .toc ol{display:grid;grid-template-columns:1fr 1fr;gap:0 .5rem}
  .applist,.warn{grid-template-columns:1fr}
  .boxlist li{grid-template-columns:1fr;gap:.15rem}
  .callouts > div{grid-template-columns:1fr;gap:.1rem}
  .figure-row{grid-template-columns:1fr 1fr}
}

/* ── print ── */
@media print{
  :root{--paper:#fff}
  body{background:#fff;font-size:10.5pt}
  .mnav,.toc,.doc-foot,.print-btn{display:none !important}
  .doc{padding:0}
  .body-grid{display:block;padding-top:0}
  .content section{break-inside:avoid;page-break-inside:avoid;border-bottom:1px solid #ddd}
  .cover{grid-template-columns:1fr 1fr;page-break-after:always}
  .tbl,.steps li,.warranty{break-inside:avoid}
  a{text-decoration:none;color:inherit}
  @page{margin:16mm}
}