/* GreenGrass Support · 共享样式（Apple 风，蓝色调，UI 不用绿色） */
:root{
  --blue:#0071e3;--blue-hover:#0077ed;--black:#1d1d1f;--gray:#6e6e73;
  --panel:#f5f5f7;--line:#d2d2d7;--in:#d70015;--out:#2e7d32;--radius:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--black);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:980px;margin:0 auto;padding:0 22px}

/* ===== 顶栏（与主站 gg-nav 统一：48px 纤细毛玻璃、logo.png + GreenGrass 文字、12px 居中链接、跟随系统深浅色） ===== */
header{position:sticky;top:0;z-index:100;background:rgba(251,251,253,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.1)}
.nav{max-width:1024px;margin:0 auto;padding:0 22px;height:48px;display:flex;align-items:center;gap:18px}
.nav .logo{display:flex;align-items:center;gap:7px;font-weight:700;font-size:16px;letter-spacing:-.02em;color:var(--black);white-space:nowrap}
.nav .logo:hover{text-decoration:none}
.nav .logo-img{width:20px;height:20px;border-radius:5px;object-fit:cover;display:block}
.nav .links{display:flex;gap:2px;flex:1;justify-content:center}
.nav a.nl{font-size:12px;font-weight:400;letter-spacing:.01em;color:var(--black);opacity:.8;padding:5px 12px;border-radius:6px;white-space:nowrap;transition:opacity .15s}
.nav a.nl:hover{opacity:1;text-decoration:none}
.nav a.nl.on{opacity:1;font-weight:600}
.nav a.ext{font-size:12px;color:var(--gray);white-space:nowrap}
@media (prefers-color-scheme: dark){
  body{background:#000;color:#f5f5f7}
  header{background:rgba(29,29,31,.8);border-bottom-color:rgba(255,255,255,.12)}
  .nav .logo,.nav a.nl{color:#fff}
  .nav a.ext{color:#86868b}
}

/* ===== Hero ===== */
.hero{background:var(--panel);text-align:center;padding:84px 22px 64px}
.hero .eyebrow{color:var(--blue);font-weight:600;font-size:15px;margin-bottom:10px}
.hero h1{font-size:48px;font-weight:700;letter-spacing:-.8px;line-height:1.15}
.hero p{color:var(--gray);font-size:19px;margin-top:14px;max-width:640px;margin-left:auto;margin-right:auto}
.hero.small{padding:60px 22px 44px}
.hero.small h1{font-size:38px}

/* ===== 主题卡片网格 ===== */
.topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;padding:44px 0 8px}
.topic{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;background:#fff;color:var(--black);transition:box-shadow .25s,transform .25s}
.topic:hover{text-decoration:none;box-shadow:0 10px 30px rgba(0,0,0,.08);transform:translateY(-2px)}
.topic .ic{font-size:26px;margin-bottom:12px;display:block}
.topic b{display:block;font-size:17px;margin-bottom:4px}
.topic span{font-size:13.5px;color:var(--gray);line-height:1.45;display:block}

/* ===== 通栏推广条 ===== */
.banner{background:var(--panel);border-radius:var(--radius);padding:34px 30px;margin:40px 0;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.banner .txt{flex:1;min-width:240px}
.banner h3{font-size:21px;font-weight:700;margin-bottom:6px}
.banner p{color:var(--gray);font-size:15px}
.banner a.btn{flex-shrink:0}

/* ===== 按钮 ===== */
a.btn,button.btn{display:inline-block;background:var(--blue);color:#fff;border-radius:980px;padding:11px 24px;font-size:15px;font-weight:500;border:0;cursor:pointer}
a.btn:hover,button.btn:hover{background:var(--blue-hover);text-decoration:none}
a.btn.ghost{background:none;color:var(--blue);border:1px solid var(--blue)}
a.btn.ghost:hover{background:rgba(0,113,227,.06)}

/* ===== 手册布局（侧栏 + 正文） ===== */
.guide{display:grid;grid-template-columns:230px 1fr;gap:48px;padding:44px 0 20px}
.side{position:sticky;top:76px;align-self:start}
.side .grp{margin-bottom:22px}
.side .grp .t{font-size:12px;font-weight:600;color:var(--gray);text-transform:uppercase;letter-spacing:.4px;margin-bottom:8px}
.side a{display:block;font-size:14px;color:var(--black);padding:5px 0;opacity:.8}
.side a:hover{opacity:1;color:var(--blue);text-decoration:none}
.side a.on{color:var(--blue);opacity:1;font-weight:600}
article.doc{min-width:0}
article.doc section{margin-bottom:56px}
.kicker{color:var(--blue);font-weight:600;font-size:14px;margin-bottom:6px}
h2.ct{font-size:30px;font-weight:700;letter-spacing:-.3px;margin-bottom:14px}
h3.st{font-size:19px;font-weight:600;margin:24px 0 8px}
p.body{color:#3a3a3c;margin-bottom:10px;max-width:720px}
ul.steps{margin:8px 0 14px 22px;color:#3a3a3c;max-width:720px}
ul.steps li{margin-bottom:6px}
.note{background:var(--panel);border-left:3px solid var(--blue);border-radius:0 12px 12px 0;padding:13px 17px;color:#3a3a3c;font-size:14.5px;max-width:720px;margin:14px 0}
.note.warn{border-left-color:var(--in)}
table.spec{border-collapse:collapse;width:100%;max-width:720px;margin:14px 0;font-size:14.5px}
table.spec th,table.spec td{border:1px solid var(--line);padding:9px 14px;text-align:left}
table.spec th{background:var(--panel);font-weight:600}
table.spec tr:nth-child(even) td{background:#fcfcfd}

/* ===== FAQ ===== */
details{border:1px solid var(--line);border-radius:14px;margin-bottom:10px;max-width:760px;background:#fff}
summary{cursor:pointer;padding:15px 19px;font-weight:600;font-size:15.5px;list-style:none}
summary::before{content:"+";color:var(--blue);margin-right:10px;font-weight:700}
details[open] summary::before{content:"−"}
details .ans{padding:0 19px 15px;color:#3a3a3c;font-size:14.5px}

/* ===== 联系卡 ===== */
.cards2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:30px 0}
.ccard{border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;background:#fff}
.ccard .ic{font-size:24px;margin-bottom:10px}
.ccard h3{font-size:18px;margin-bottom:6px}
.ccard p{color:var(--gray);font-size:14.5px;margin-bottom:12px}

/* ===== 页脚 ===== */
footer{border-top:1px solid var(--line);margin-top:64px;background:var(--panel)}
footer .cols{max-width:980px;margin:0 auto;padding:36px 22px 8px;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:24px}
footer .cols .t{font-size:12px;font-weight:600;color:var(--gray);margin-bottom:8px}
footer .cols a{display:block;font-size:13px;color:var(--black);opacity:.8;padding:3px 0}
footer .cols a:hover{opacity:1;color:var(--blue);text-decoration:none}
footer .base{max-width:980px;margin:0 auto;padding:18px 22px 40px;color:var(--gray);font-size:12.5px;border-top:1px solid var(--line);margin-top:20px;padding-top:18px}

@media(max-width:820px){
  .guide{grid-template-columns:1fr;gap:20px}
  .side{position:static;display:flex;gap:8px;overflow-x:auto;padding-bottom:6px}
  .side .grp{margin:0;flex-shrink:0}
  .side .grp .t{display:none}
  .side a{border:1px solid var(--line);border-radius:980px;padding:6px 14px;white-space:nowrap;font-size:13px}
  .side a.on{border-color:var(--blue)}
}
@media(max-width:640px){
  .hero h1{font-size:32px}
  .hero.small h1{font-size:28px}
  .nav{gap:16px;overflow-x:auto}
}