*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#0f172a;line-height:1.78;font-size:16px}
a{color:#0d9488;text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:2px solid #ccfbf1;position:sticky;top:0;z-index:400;box-shadow:0 1px 0 rgba(13,148,136,.07)}
.header-inner{max-width:1140px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:11px;color:#134e4a;font-weight:600;font-size:.96rem}
.brand em{font-style:normal;color:#0f766e;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none}
.site-nav a{color:#115e59;font-size:.91rem;transition:color .15s}
.site-nav a.active{color:#0d9488;font-weight:600;border-bottom:2px solid #5eead4;padding-bottom:2px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:#115e59;margin:5px 0;border-radius:2px}

.ads-top-bar{background:linear-gradient(180deg,#f0fdfa,#ecfeff);border-bottom:1px solid #99f6e4;padding:12px 0}
#applist .applist-title{font-size:.84rem;color:#64748b;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:14px}

.page-grid{max-width:1140px;margin:0 auto;padding:0 22px 60px;display:grid;grid-template-columns:minmax(0,1fr) 188px;gap:30px;align-items:start}
.page-body{min-width:0}

.hero-block{padding:42px 0 34px;border-bottom:3px dotted #99f6e4;margin-bottom:6px}
.hero-block .hero-label{display:inline-block;font-size:.79rem;color:#0f766e;background:#ccfbf1;padding:5px 15px;border-radius:3px 14px 3px 14px;margin-bottom:15px;font-weight:500}
.hero-block h1{font-size:clamp(1.4rem,3.6vw,2rem);line-height:1.3;margin-bottom:17px;color:#0f172a;max-width:710px;font-weight:700}
.hero-block .intro{font-size:1.02rem;color:#334155;max-width:750px;margin-bottom:13px}
.tag-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
.tag-list span{font-size:.76rem;background:#f0fdfa;color:#0f766e;padding:5px 13px;border-radius:20px;border:1px solid #99f6e4}

.side-index{position:sticky;top:80px;padding-top:34px}
.side-index h2{font-size:.84rem;color:#64748b;margin-bottom:14px;font-weight:600;letter-spacing:.04em}
.side-index ol{list-style:none;font-size:.82rem;line-height:2.1}
.side-index a{color:#475569;padding:3px 0 3px 12px;display:block;border-left:3px solid #e2e8f0;transition:all .15s}
.side-index a:hover{color:#0d9488;border-left-color:#2dd4bf;background:#f0fdfa;margin-left:-3px;padding-left:15px}

.offset-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px 26px;padding:34px 0}
.cell{background:#fff;border:1px solid #e2e8f0;border-radius:14px 2px 14px 2px;padding:24px 26px;box-shadow:3px 3px 0 #ccfbf1;transition:transform .16s,box-shadow .16s}
.cell:hover{transform:translate(2px,2px);box-shadow:5px 5px 0 #99f6e4}
.cell h2{font-size:1.1rem;margin-bottom:13px;color:#0f172a;padding-bottom:9px;border-bottom:2px dashed #ccfbf1;font-weight:600}
.cell p{margin-bottom:12px;color:#334155;font-size:.93rem}
.cell figure{margin:18px 0 0;border-radius:8px;overflow:hidden;border:1px solid #e2e8f0}
.cell figcaption{font-size:.77rem;color:#64748b;margin-top:9px;text-align:center;line-height:1.5}

.span-8{grid-column:span 8}
.span-7{grid-column:span 7}
.span-6{grid-column:span 6}
.span-5{grid-column:span 5}
.span-4{grid-column:span 4}
.span-12{grid-column:span 12}
.push-down{margin-top:42px}
.pull-up{margin-top:-20px}
.shift-left{margin-left:-14px}
.shift-right{margin-right:-14px}
.extra-bottom{padding-bottom:36px}

.hint-box{background:linear-gradient(120deg,#f0fdfa,#ecfeff);border-left:4px solid #14b8a6;padding:15px 18px;margin:14px 0;border-radius:0 12px 12px 0;font-size:.91rem;color:#0f766e;line-height:1.62}

.faq-block{padding:38px 0;border-top:3px dotted #99f6e4;margin-top:18px}
.faq-block h2{font-size:1.18rem;margin-bottom:18px;color:#0f172a}
.faq-row{border:1px solid #e2e8f0;border-radius:12px 2px 12px 2px;padding:18px 20px;margin-bottom:14px;background:#f8fafc;box-shadow:2px 2px 0 #ccfbf1}
.faq-row h3{font-size:.98rem;margin-bottom:8px;color:#134e4a;font-weight:600}

.more-links{padding:28px 0;border-top:1px solid #e2e8f0}
.more-links h2{font-size:1.04rem;margin-bottom:12px;color:#0f172a}
.more-links ul{padding-left:1.25rem;line-height:2.05;color:#334155}

.closing{max-width:1140px;margin:0 auto;padding:0 22px 50px}
.closing h2{font-size:1.06rem;margin-bottom:12px;color:#0f172a}
.closing p{color:#334155;font-size:.94rem;margin-bottom:11px}

.site-footer{background:#f0fdfa;border-top:2px solid #ccfbf1;padding:28px 22px;text-align:center;font-size:.86rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 20px;margin-bottom:11px}
.footer-note{font-size:.8rem;color:#94a3b8;margin-top:7px}

.prose-page{max-width:680px;margin:42px auto;padding:0 22px}
.prose-page h1{font-size:1.36rem;margin-bottom:16px;color:#0f172a}
.error-page{max-width:440px;margin:84px auto;padding:0 22px;text-align:center}

@media(max-width:960px){
  .page-grid{grid-template-columns:1fr}
  .side-index{position:static;order:-1;padding:18px 0;border-bottom:2px solid #ccfbf1}
  .side-index ol{display:flex;flex-wrap:wrap;gap:7px 9px}
  .side-index a{border-left:0;padding:5px 12px;background:#ecfdf5;border-radius:6px;font-size:.78rem}
  .side-index a:hover{margin-left:0;padding-left:12px}
  .span-8,.span-7,.span-6,.span-5,.span-4,.span-12{grid-column:span 12}
  .push-down,.pull-up,.shift-left,.shift-right{margin:0}
}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid #ccfbf1;display:none;padding:14px 22px;box-shadow:0 8px 16px rgba(13,148,136,.08)}
  .site-nav.is-open{display:block}
  .site-header{position:relative}
}