/* 宣羽手写 · 使用指南 / 常见问题 文章页
   Static, crawlable reading pages that share the landing page's paper & ink palette. */
@font-face{font-family:"XuanYu Wordmark";src:url("/assets/wordmark.otf") format("opentype");font-display:swap}
:root{
  --paper:#f5f1e8;--paper-2:#ede7da;--card:#fffdf8;--ink:#14213d;--ink-2:#3a4659;--muted:#6e7684;
  --line:#ddd5c5;--line-soft:#e8e1d3;--blue:#1f6bd6;--blue-deep:#1d3f73;--gold:#e9a21a;--gold-soft:#f6d58f;--green:#2f7a55;--night:#0e1729;
  --sans:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei UI","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Consolas,monospace;
  --gutter:clamp(16px,4vw,40px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  background:radial-gradient(60vmax 50vmax at 0% 0%,rgba(246,213,143,.45),transparent 70%),radial-gradient(60vmax 50vmax at 100% 20%,rgba(150,186,235,.35),transparent 70%),var(--paper);background-attachment:fixed}
img{display:block;max-width:100%;height:auto}
a{color:var(--blue-deep)}
h1,h2,h3,p,ul,ol,dl,figure{margin:0}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 var(--gutter)}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(245,241,232,.82);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line-soft)}
.top .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand img{width:30px;height:30px}
.brand span{font-family:"XuanYu Wordmark",var(--sans);font-size:21px;letter-spacing:.06em}
.top nav{display:flex;gap:4px;margin-left:auto}
.top nav a{padding:7px 13px;border-radius:999px;font-size:14px;color:var(--ink-2);text-decoration:none}
.top nav a:hover,.top nav a[aria-current=page]{background:rgba(20,33,61,.06);color:var(--ink)}
.cta{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;background:var(--ink);color:var(--paper);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap;box-shadow:0 10px 24px -12px rgba(20,33,61,.6)}
.cta:hover{background:var(--blue)}
.cta.lg{padding:14px 26px;font-size:16px}

/* breadcrumb + hero */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;margin:28px 0 0;padding:0;list-style:none;font-size:13px;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--ink)}
.head{padding:22px 0 8px;max-width:820px}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--blue);text-transform:uppercase}
.head h1{margin-top:12px;font-size:clamp(30px,4.4vw,48px);line-height:1.2;letter-spacing:-.02em}
.answer{margin-top:20px;padding:18px 22px;border-left:4px solid var(--gold);border-radius:0 14px 14px 0;background:rgba(255,253,248,.85);font-size:17px;color:var(--ink)}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:16px;font-size:13px;color:var(--muted)}

/* article layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:clamp(28px,5vw,64px);align-items:start;padding:28px 0 72px}
.article{min-width:0}
.article>*+*{margin-top:18px}
.article h2{margin-top:48px;font-size:clamp(22px,2.4vw,28px);line-height:1.35;letter-spacing:-.01em;scroll-margin-top:84px}
.article h3{margin-top:28px;font-size:19px}
.article p,.article li{color:var(--ink-2)}
.article ul,.article ol{padding-left:1.3em}
.article li+li{margin-top:6px}
.article strong{color:var(--ink)}
.step{position:relative;margin-top:40px;padding-left:58px}
.step>h2{margin-top:0}
.step-no{position:absolute;left:0;top:-2px;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--ink);color:var(--paper);font:700 17px var(--sans)}
.step>*+*{margin-top:14px}
.shot{border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 0 0 1px rgba(20,33,61,.08),0 30px 60px -36px rgba(20,33,61,.5)}
.shot figcaption{padding:10px 14px;font-size:13px;color:var(--muted);background:var(--card);border-top:1px solid var(--line-soft)}
.tip{padding:16px 18px;border-radius:14px;background:rgba(31,107,214,.07);border:1px solid rgba(31,107,214,.16);font-size:15px}
.tip b{color:var(--blue-deep)}
.facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;border-radius:16px;overflow:hidden;background:var(--line-soft);border:1px solid var(--line-soft)}
.facts div{padding:14px 18px;background:var(--card)}
.facts dt{font-size:12px;color:var(--muted)}
.facts dd{margin:2px 0 0;font-weight:600;color:var(--ink)}

/* faq list */
.qa{border-top:1px solid var(--line)}
.qa details{border-bottom:1px solid var(--line)}
.qa summary{display:flex;justify-content:space-between;gap:16px;padding:20px 4px;cursor:pointer;list-style:none;font-size:18px;font-weight:600;color:var(--ink)}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1px solid var(--line);font-weight:400;color:var(--ink-2)}
.qa details[open] summary::after{content:"−";background:var(--ink);color:var(--paper);border-color:var(--ink)}
.qa .a{padding:0 44px 22px 4px}
.qa .a>*+*{margin-top:10px}
.qa-group{margin-top:44px;font-size:15px;font-weight:700;letter-spacing:.12em;color:var(--blue)}

/* sidebar */
.side{position:sticky;top:88px;display:grid;gap:16px}
.box{padding:20px;border-radius:18px;background:rgba(255,253,248,.85);border:1px solid var(--line-soft)}
.box h2{font-size:14px;color:var(--muted);font-weight:600;margin-bottom:10px}
.box ol,.box ul{margin:0;padding-left:1.2em;font-size:14px}
.box li+li{margin-top:6px}
.box a{text-decoration:none}
.box a:hover{text-decoration:underline}
.box.dark{background:var(--night);color:var(--paper);border:0}
.box.dark p{font-size:14px;color:rgba(245,241,232,.75);margin:6px 0 14px}
.box.dark strong{font-size:17px}
.box.dark .cta{background:var(--paper);color:var(--ink)}

/* guide cards */
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding:28px 0 72px}
.card{display:flex;flex-direction:column;border-radius:20px;overflow:hidden;background:var(--card);border:1px solid var(--line-soft);text-decoration:none;color:var(--ink);transition:transform .4s,box-shadow .4s}
.card:hover{transform:translateY(-4px);box-shadow:0 30px 60px -36px rgba(20,33,61,.5)}
.card img{aspect-ratio:16/9;object-fit:cover;object-position:top left;border-bottom:1px solid var(--line-soft)}
.card div{padding:18px 20px 22px}
.card h2{font-size:20px}
.card p{margin-top:6px;font-size:14px;color:var(--ink-2)}
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.related a{padding:14px 16px;border-radius:14px;background:var(--card);border:1px solid var(--line-soft);font-size:14px;font-weight:600;text-decoration:none;color:var(--ink)}
.related a:hover{border-color:var(--ink-2)}
.endcta{margin-top:48px;padding:28px;border-radius:22px;background:var(--night);color:var(--paper);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
.endcta p{color:rgba(245,241,232,.75);font-size:15px;margin-top:4px}
.endcta strong{font-size:20px}
.endcta .cta{background:var(--paper);color:var(--ink)}

/* footer */
.foot{border-top:1px solid var(--line-soft);padding:26px 0 34px;font-size:13px;color:var(--muted)}
.foot .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center}
.foot nav{display:flex;flex-wrap:wrap;gap:16px;margin-left:auto}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--ink)}

@media (max-width:900px){
  .layout{grid-template-columns:1fr}
  .side{position:static}
  .related{grid-template-columns:1fr}
}
@media (max-width:640px){
  .top nav{display:none}
  .top .cta{margin-left:auto}
  .step{padding-left:0}
  .step-no{position:static;margin-bottom:10px}
  .cards{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .qa .a{padding-right:4px}
  .qa summary{font-size:16px}
}

/* comparison table */
.cmp-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line-soft);background:var(--card)}
.cmp{width:100%;min-width:560px;border-collapse:collapse;font-size:14px;line-height:1.6}
.cmp th,.cmp td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line-soft)}
.cmp tr:last-child th,.cmp tr:last-child td{border-bottom:0}
.cmp thead th{font-size:13px;color:var(--muted);background:var(--paper-2)}
.cmp thead th.me{background:var(--ink);color:var(--paper)}
.cmp tbody th{width:96px;color:var(--ink);white-space:nowrap}
.cmp td{color:var(--muted)}
.cmp td.me{color:var(--ink);font-weight:600;background:rgba(246,213,143,.18)}
.cmp td.me::before{content:"✓ ";color:var(--green)}
.note{font-size:13px;color:var(--muted)}