:root{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  color:#171821;
  background:#f7f7fb;
  --primary:#5b56f0;
  --primary-dark:#4742d6;
  --ink:#171821;
  --muted:#626779;
  --line:#e3e4ee;
  --card:#fff;
  --soft:#efefff;
  --coral:#ff7d68;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,#fbfbfe 0%,#f7f7fb 48%,#fff 100%);color:var(--ink)}
a{color:var(--primary)}
.ja,.en{display:none}
html[data-lang="ja"] .ja{display:inline}
html[data-lang="en"] .en{display:inline}

.site-header{
  max-width:1120px;
  margin:0 auto;
  padding:22px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand-lockup{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:18px}
.mark{width:72px;height:72px;border-radius:20px;background:var(--primary);color:#fff;font-size:38px;font-weight:800;display:grid;place-items:center}
.mark.small{width:36px;height:36px;border-radius:11px;font-size:19px}
.mark.tiny{width:28px;height:28px;border-radius:9px;font-size:15px}
.lang-switch{display:flex;gap:4px;padding:4px;background:#ececf4;border-radius:12px}
.lang-switch button{border:0;background:transparent;color:#676b7a;padding:8px 10px;border-radius:9px;font-weight:700;cursor:pointer}
.lang-switch button.active{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(32,31,66,.08)}

.landing{max-width:1120px;margin:0 auto;padding:38px 24px 80px}
.hero{display:grid;grid-template-columns:1.12fr .88fr;gap:64px;align-items:center;padding:54px 0 84px}
.eyebrow,.section-kicker{margin:0 0 16px;color:var(--primary);font-size:13px;font-weight:900;letter-spacing:.11em}
.hero h1{font-size:clamp(44px,6vw,74px);line-height:1.03;letter-spacing:-.045em;margin:0}
.hero-lead{max-width:650px;color:var(--muted);font-size:19px;line-height:1.8;margin:24px 0 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:13px 19px;border-radius:14px;background:var(--primary);color:#fff;text-decoration:none;font-weight:800}
.button.primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(91,86,240,.2)}
.button.primary:hover{background:var(--primary-dark)}
.button.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.proof-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:26px}
.proof-row>span,.tag-row>span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 11px;color:#616678;font-size:13px;font-weight:700}

.hero-preview{background:#fff;border:1px solid #e2e3ee;border-radius:30px;padding:26px;box-shadow:0 24px 70px rgba(35,33,82,.12);transform:rotate(1.2deg)}
.preview-top{display:flex;align-items:center;gap:9px;padding-bottom:18px;border-bottom:1px solid #ececf3}
.preview-dot{width:11px;height:11px;border-radius:50%;background:var(--primary)}
.preview-label{font-size:22px;font-weight:800;color:var(--ink);margin:24px 0 15px;line-height:1.4}
.preview-choice{display:flex;gap:14px;align-items:center;padding:17px;margin-top:11px;border:1px solid var(--line);border-radius:18px;background:#fff}
.preview-choice.accent{background:linear-gradient(135deg,#f3f1ff,#fff6f2);border-color:#dcd9ff}
.preview-choice strong,.preview-choice small{display:block}
.preview-choice small{margin-top:5px;color:#737788;font-size:12px;line-height:1.5}

.section{padding:86px 0}
.section h2,.photos-section h2,.cta-section h2{font-size:clamp(32px,4vw,48px);line-height:1.15;letter-spacing:-.035em;margin:0}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.feature-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;min-height:215px;box-shadow:0 8px 30px rgba(32,31,66,.045)}
.feature-card.featured{background:linear-gradient(145deg,#f2f0ff 0%,#fff7f3 100%);border-color:#d8d5ff}
.feature-card h3{font-size:20px;margin:18px 0 8px}
.feature-card p{font-size:15px;line-height:1.75;color:var(--muted);margin:0}
.feature-icon{width:42px;height:42px;border-radius:13px;background:var(--soft);color:var(--primary);font-weight:900;display:grid;place-items:center;font-size:20px}
.new-badge{position:absolute;right:18px;top:18px;background:var(--coral);color:#fff;border-radius:999px;padding:6px 9px;font-size:10px;font-weight:900;letter-spacing:.08em}

.help-section{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:72px 56px;border-radius:34px;background:linear-gradient(145deg,#eef6f1 0%,#fff 100%);border:1px solid #dbe8df;margin-bottom:24px}
.help-section .section-kicker{color:#34745f}
.help-copy>p:not(.section-kicker){font-size:17px;line-height:1.8;color:#5d6b65}
.help-tags>span{background:#fff;border-color:#dbe8df;color:#50625a}
.help-links a{color:#34745f}
.help-stack{display:grid;gap:12px}
.help-section .guide-symbol{background:#e6f1eb;color:#34745f}

.photos-section{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:86px 56px;border-radius:34px;background:#191a25;color:#fff}
.photos-section .section-kicker{color:#aaa6ff}
.photos-copy>p:not(.section-kicker){font-size:17px;line-height:1.8;color:#c9cbd5}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.tag-row>span{background:#252633;border-color:#363746;color:#dedfea}
.guide-stack{display:grid;gap:12px}
.guide-row{display:flex;align-items:center;gap:14px;background:#fff;color:var(--ink);border-radius:18px;padding:18px 19px}
.guide-symbol{width:42px;height:42px;border-radius:13px;background:#f0efff;color:var(--primary);font-size:19px;font-weight:900;display:grid;place-items:center}
.guide-row strong,.guide-row small{display:block}
.guide-row small{margin-top:4px;color:#747888;font-size:12px}

.cta-section{text-align:center;padding:100px 20px 60px}
.cta-section p{color:var(--muted);font-size:18px;margin:18px 0 26px}

.site-footer{max-width:1120px;margin:0 auto;padding:30px 24px 50px;border-top:1px solid var(--line)}
.footer-brand{display:flex;align-items:center;gap:9px}
.site-footer nav{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px}
.site-footer nav a{color:#555a6b;text-decoration:none;font-size:14px}
.video-note{font-size:12px;line-height:1.65;color:#8a8e9d;margin-top:26px;max-width:740px}

main:not(.landing){max-width:820px;margin:0 auto;padding:48px 22px 72px}
.brand{display:inline-block;margin-bottom:34px;color:var(--primary);text-decoration:none;font-weight:800;font-size:20px}
main:not(.landing) h1{font-size:40px;line-height:1.18;margin:0 0 12px}
main:not(.landing) h2{font-size:25px;margin-top:38px}
main:not(.landing) h3{font-size:18px;margin-top:28px}
main:not(.landing) p{font-size:16px;line-height:1.75;color:#454956}
.meta{color:#7a7f8f;font-size:14px}
code{background:#ececf3;border-radius:5px;padding:2px 5px}
main:not(.landing) nav{display:flex;gap:18px;flex-wrap:wrap;border-top:1px solid #dddfea;margin-top:48px;padding-top:24px}

@media(max-width:850px){
  .hero{grid-template-columns:1fr;gap:38px;padding-top:34px}
  .hero-preview{max-width:560px;transform:none}
  .feature-grid{grid-template-columns:1fr 1fr}
  .help-section,.photos-section{grid-template-columns:1fr;padding:52px 28px;gap:34px}
}
@media(max-width:560px){
  .site-header{padding:16px}
  .landing{padding:18px 16px 56px}
  .hero{padding:28px 0 62px}
  .hero h1{font-size:43px}
  .hero-lead{font-size:17px}
  .hero-actions{display:grid}
  .feature-grid{grid-template-columns:1fr}
  .section{padding:62px 0}
  .help-section,.photos-section{border-radius:24px;margin-left:-4px;margin-right:-4px;padding:42px 20px}
  .lang-switch button{padding:7px 8px;font-size:12px}
  .brand-lockup{font-size:16px}
}


.guide-links{margin-top:24px}
.guide-links a{font-weight:800;text-decoration:none;color:#c9c6ff}
.guide-links a:hover{text-decoration:underline}
.guide-lang-link{font-size:14px;font-weight:800;text-decoration:none}

.guide-page,.guide-index-page,.guide-language-page{max-width:980px;margin:0 auto;padding:44px 24px 86px}
.breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px;color:#7a7f8f;margin-bottom:28px}
.breadcrumb a{color:#666b7b;text-decoration:none}
.guide-page article>h1,.guide-index-page h1,.guide-language-page h1{font-size:clamp(38px,6vw,64px);line-height:1.08;letter-spacing:-.04em;margin:0}
.guide-summary,.guide-index-lead{font-size:19px;line-height:1.8;color:var(--muted);max-width:760px;margin:20px 0 0}
.guide-benefit{font-size:16px;line-height:1.75;margin:16px 0 0;color:#3f4352}
.guide-badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.guide-badges span{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;color:#676b7a;font-size:12px;font-weight:800}
.guide-note{margin:28px 0;padding:20px 22px;border-radius:18px;background:#fff;border:1px solid var(--line)}
.guide-note.success{background:#f4fff8;border-color:#d7f1df}
.guide-note strong{display:block;font-size:14px;margin-bottom:6px}
.guide-note p{margin:0;font-size:15px;line-height:1.75;color:#555a69}

.steps-section{margin-top:54px}
.steps-section>h2{font-size:32px;margin:0}
.seo-steps{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:14px}
.seo-step{display:grid;grid-template-columns:46px 1fr;gap:14px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}
.step-number{width:38px;height:38px;border-radius:12px;background:var(--soft);color:var(--primary);font-weight:900;display:grid;place-items:center}
.seo-step h2{font-size:18px;margin:2px 0 7px}
.seo-step p{margin:0;font-size:15px;line-height:1.72;color:#555a69}

.guide-cta{display:grid;grid-template-columns:48px 1fr;gap:18px;align-items:start;margin:54px 0;padding:26px;border-radius:24px;background:linear-gradient(145deg,#f1efff 0%,#fff6f2 100%);border:1px solid #ddd9ff}
.guide-cta h2{font-size:25px;margin:0 0 8px}
.guide-cta p{margin:0 0 18px;color:#5f6374;line-height:1.7}

.related-section{margin-top:64px}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.related-card,.guide-index-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;text-decoration:none;color:var(--ink)}
.related-card:hover,.guide-index-card:hover{border-color:#c9c6ff;box-shadow:0 8px 24px rgba(32,31,66,.06)}
.related-card span,.guide-index-card>span{font-size:11px;color:var(--primary);font-weight:900;letter-spacing:.05em}
.related-card strong{display:block;font-size:16px;line-height:1.45;margin:7px 0}
.related-card small{display:block;color:#747888;line-height:1.55}

.guide-index-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:34px}
.guide-index-card h2{font-size:18px;line-height:1.45;margin:7px 0 6px}
.guide-index-card p{margin:0;color:#686d7d;font-size:14px;line-height:1.65}
.language-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:30px}
.guide-language-page>p{font-size:17px;color:var(--muted)}

@media(max-width:700px){
  .guide-page,.guide-index-page,.guide-language-page{padding:30px 16px 60px}
  .guide-index-grid,.related-grid,.language-cards{grid-template-columns:1fr}
  .guide-cta{grid-template-columns:1fr}
  .seo-step{grid-template-columns:40px 1fr;padding:16px}
}