:root{
  --bg:#ffffff;--ink:#111827;--muted:#5b6472;--line:#e5e7eb;--soft:#f8fafc;--soft2:#fff7ed;--accent:#f97316;--accent2:#2563eb;--card:#ffffff;--shadow:0 18px 45px rgba(15,23,42,.08);--radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,#fff 0%,#fffaf5 48%,#fff 100%);color:var(--ink);font:17px/1.72 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;text-rendering:optimizeLegibility}
a{color:#c2410c;text-decoration-thickness:1px;text-underline-offset:3px}
code{padding:.08em .34em;border-radius:7px;background:#fff7ed;border:1px solid #fed7aa;color:#7c2d12;font-size:.92em}
hr{border:0;border-top:1px solid var(--line);margin:22px 0}
.wrap{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:34px 0 76px}
.crumbs{font-size:14px;color:var(--muted);margin:0 0 16px}.crumbs a{color:inherit;text-decoration:none}.crumbs span{margin:0 6px;color:#9ca3af}
.hero{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(270px,.82fr);gap:18px;align-items:stretch;margin-bottom:20px}
.hero-card,.side-card,.section,.toc{background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{padding:30px}.eyebrow{margin:0 0 10px;color:#9a3412;text-transform:uppercase;letter-spacing:.09em;font-size:12px;font-weight:800}.hero h1{margin:0 0 12px;font-size:clamp(31px,5vw,52px);line-height:1.04;letter-spacing:-.035em}.lead{margin:0;color:#374151;font-size:18px;max-width:76ch}.meta{margin-top:18px;color:var(--muted);font-size:14px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:999px;border:1px solid #fdba74;background:#f97316;color:#fff;text-decoration:none;font-weight:750}.btn:hover{text-decoration:none;filter:brightness(.98)}.btn.secondary{background:#fff;color:#9a3412}.btn.ghost{background:var(--soft);border-color:var(--line);color:#111827}
.side-card{padding:18px;display:grid;gap:12px}.fact{padding:14px;border-radius:16px;background:var(--soft);border:1px solid #edf0f4}.fact h2,.fact h3{margin:0 0 6px;font-size:16px}.fact p{margin:0;color:#4b5563;font-size:15px;line-height:1.55}.fact a{font-weight:700;text-decoration:none}
.lang-switch{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:16px 0 22px;color:var(--muted);font-size:14px}.lang-switch strong{color:#111827}.lang-switch a{display:inline-flex;min-height:32px;align-items:center;padding:4px 10px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#374151;text-decoration:none}.lang-switch a.is-active{background:#111827;color:#fff;border-color:#111827}
.guide-nav{display:flex;gap:8px;overflow-x:auto;white-space:nowrap;padding:4px 2px 14px;margin:4px 0 12px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}.guide-nav a{scroll-snap-align:start;display:inline-flex;align-items:center;min-height:36px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#374151;text-decoration:none;font-size:14px;font-weight:700}.guide-nav a:hover{background:#fff7ed;color:#9a3412}.guide-nav a.is-active{background:#111827;color:#fff;border-color:#111827}
.layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:20px;align-items:start}.toc{position:sticky;top:16px;padding:16px;max-height:calc(100vh - 32px);overflow:auto}.toc h2{margin:0 0 10px;font-size:16px}.toc a{display:block;padding:8px 10px;border-radius:12px;color:#374151;text-decoration:none;font-size:14px;line-height:1.35}.toc a.toc-sub{padding-left:22px;font-size:13px;color:#64748b}.toc a:hover{background:var(--soft2);color:#9a3412}
.content{display:grid;gap:18px;min-width:0}.section{padding:24px;overflow:hidden}.section h2{margin:0 0 8px;font-size:clamp(24px,3vw,32px);line-height:1.18;letter-spacing:-.02em}.section h3{margin:24px 0 9px;font-size:21px;line-height:1.25}.section .intro{margin:0 0 18px;color:#4b5563}.section p{margin:0 0 14px;color:#374151}.section p:last-child{margin-bottom:0}.section ul,.section ol{margin:0 0 16px;padding-left:22px}.section li{margin:0 0 8px;color:#374151}.steps{counter-reset:step;display:grid;gap:12px}.step{counter-increment:step;display:grid;grid-template-columns:42px minmax(0,1fr);gap:12px;padding:14px;border-radius:18px;background:var(--soft);border:1px solid #eef1f5}.num{width:34px;height:34px;border-radius:999px;background:#fff7ed;color:#9a3412;border:1px solid #fed7aa;display:flex;align-items:center;justify-content:center;font-weight:800}.num::before{content:counter(step)}.step h3{margin:1px 0 4px;font-size:17px;line-height:1.3}.step p{margin:0;color:#4b5563;font-size:15.5px;line-height:1.6}.note{border-left:4px solid var(--accent);background:#fff7ed;padding:14px 16px;border-radius:16px;margin-top:12px;color:#7c2d12}.footer-card{margin-top:22px;padding:18px;border-radius:20px;background:#111827;color:#f9fafb}.footer-card a{color:#fed7aa}.footer-card p{margin:0;color:#d1d5db}
.guide-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:16px}.guide-card-large,.method-card{display:flex;flex-direction:column;gap:8px;padding:17px;border:1px solid #eef1f5;border-radius:18px;background:linear-gradient(180deg,#fff,#fffaf5);text-decoration:none;color:#111827;min-height:158px}.guide-card-large:hover,.method-card:hover{border-color:#fdba74;text-decoration:none;transform:translateY(-1px)}.guide-card-large__kicker,.method-card__num{font-size:12px;line-height:1;color:#9a3412;text-transform:uppercase;letter-spacing:.08em;font-weight:800}.guide-card-large strong,.method-card strong{font-size:18px;line-height:1.25}.guide-card-large span:last-child,.method-card span:last-child{color:#4b5563;font-size:14px;line-height:1.5}
.method-chip-grid{display:flex;flex-wrap:wrap;gap:8px}.method-chip-grid a{display:inline-flex;align-items:center;min-height:34px;padding:4px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);text-decoration:none;color:#374151;font-size:14px}.method-chip-grid a:hover{background:#fff7ed;color:#9a3412}.method-chip-grid .all-methods{background:#111827;color:#fff;border-color:#111827}
.method-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:16px}.method-card{min-height:180px}.method-article h2:first-child{margin-top:0}.method-prev-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.method-prev-next a,.method-prev-next span:empty{display:flex;flex-direction:column;gap:4px;min-height:76px;padding:14px 16px;border-radius:18px;border:1px solid var(--line);background:#fff;text-decoration:none;color:#111827}.method-prev-next a span{font-size:12px;color:#9a3412;font-weight:800;text-transform:uppercase;letter-spacing:.06em}.method-prev-next a strong{font-size:16px;line-height:1.35}.method-prev-next a:last-child{text-align:right;align-items:flex-end}
@media (max-width:920px){.hero{grid-template-columns:1fr}.layout{grid-template-columns:1fr}.toc{position:static;max-height:none}.wrap{padding-top:24px}.hero-card{padding:22px}.section{padding:20px}.guide-card-grid,.method-grid{grid-template-columns:1fr}.method-prev-next{grid-template-columns:1fr}.method-prev-next a:last-child{text-align:left;align-items:flex-start}}
@media (max-width:520px){body{font-size:16px}.wrap{width:min(100% - 24px,1080px);padding-bottom:68px}.hero h1{font-size:32px}.actions .btn{width:100%}.step{grid-template-columns:1fr}.num{width:30px;height:30px}.toc a{padding:9px 8px}.lang-switch a{padding-inline:9px}.guide-card-large,.method-card{min-height:0}.guide-nav{margin-left:-2px;margin-right:-2px}}

/* ORI24 instruction correction 2026-04-19: main guide field as blog-like full articles. */
.guide-topic-article{
  padding:28px 30px;
  border-radius:24px;
  background:rgba(255,255,255,.96);
}
.guide-topic-article--intro{
  background:linear-gradient(180deg,#fff,#fffaf5);
}
.guide-topic-kicker{
  margin:0 0 8px;
  color:#9a3412;
  text-transform:uppercase;
  letter-spacing:.08em;
  font-size:12px;
  font-weight:850;
}
.guide-topic-article h2{
  max-width:780px;
}
.guide-topic-text{
  max-width:820px;
}
.guide-topic-text p{
  font-size:16.5px;
  line-height:1.78;
}
.guide-article-list{
  margin:12px 0 0;
  padding-left:20px;
}
.guide-article-list li{
  margin:0 0 6px;
  color:#4b5563;
}
.guide-topic-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.guide-read-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:8px 15px;
  border-radius:999px;
  border:1px solid #fdba74;
  background:#fff7ed;
  color:#9a3412;
  text-decoration:none;
  font-weight:800;
}
.guide-read-link:hover{
  background:#ffedd5;
  text-decoration:none;
}
.guide-content{
  gap:16px;
}
@media (max-width:920px){
  .guide-topic-article{padding:22px;}
}
@media (max-width:520px){
  .guide-topic-article{padding:18px;border-radius:20px;}
  .guide-topic-text p{font-size:16px;line-height:1.68;}
  .guide-read-link{width:100%;}
}