*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1c1917;line-height:1.78;font-size:16px}
a{color:#0f766e;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:1px solid #e7e5e4;position:sticky;top:0;z-index:500}
.header-inner{max-width:640px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:600;font-size:.92rem;line-height:1.35}
.brand em{font-style:normal;color:#0f766e;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 14px;list-style:none}
.site-nav a{color:#57534e;font-size:.88rem}
.site-nav a.active{color:#0f766e;font-weight:600}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:#292524;margin:5px 0;border-radius:1px}

.ads-top-bar{background:#f0fdfa;border-bottom:1px solid #ccfbf1;padding:10px 0}
#applist .applist-title{font-size:.82rem;color:#78716c;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:12px}

.col-shell{max-width:640px;margin:0 auto;padding:0 18px 72px}
.col-body{display:flex;flex-direction:column}

.col-rail{position:sticky;top:56px;z-index:300;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid #f5f5f4;padding:12px 0 10px;margin-bottom:20px}
.col-rail ul{display:flex;flex-wrap:wrap;gap:5px 8px;list-style:none}
.col-rail a{font-size:.76rem;color:#78716c;background:#fafaf9;padding:5px 11px;border-radius:6px;border:1px solid #e7e5e4;white-space:nowrap;transition:background .15s,border-color .15s,color .15s}
.col-rail a.is-on,.col-rail a:hover{color:#0f766e;border-color:#5eead4;background:#ecfdf5}

.col-hero{padding:36px 0 30px;border-bottom:3px double #d6d3d1;margin-bottom:4px}
.col-hero .lead-tag{display:inline-block;font-size:.78rem;color:#134e4a;background:#ccfbf1;padding:5px 13px;border-radius:2px;margin-bottom:16px;letter-spacing:.04em;font-weight:500}
.col-hero h1{font-size:clamp(1.38rem,4.2vw,1.95rem);line-height:1.34;margin-bottom:18px;color:#0c0a09;font-weight:700}
.col-hero .lead-text{font-size:1.01rem;color:#44403c;margin-bottom:13px}
.col-hero .lead-foot{font-size:.84rem;color:#a8a29e;margin-top:20px;padding-top:16px;border-top:1px dotted #d6d3d1}

.col-block{padding:26px 0;border-bottom:1px solid #f5f5f4}
.col-block:last-of-type{border-bottom:0}
.col-block h2{font-size:1.14rem;margin-bottom:13px;color:#1c1917;font-weight:700;position:relative;padding-bottom:8px}
.col-block h2::after{content:"";position:absolute;left:0;bottom:0;width:36px;height:3px;background:linear-gradient(90deg,#0f766e,#5eead4);border-radius:2px}
.col-block p{margin-bottom:13px;color:#44403c;font-size:.96rem}
.col-block ul,.col-block ol{margin:0 0 13px 1.2rem;color:#44403c;font-size:.95rem}
.col-block li{margin-bottom:7px}

.col-band{background:#fffbeb;border-left:4px solid #f59e0b;padding:14px 16px;margin:16px 0;font-size:.93rem;color:#78350f;border-radius:0 8px 8px 0}
.col-band strong{color:#b45309}

.col-quote{font-size:1.06rem;font-weight:500;color:#292524;font-style:italic;border-top:1px solid #e7e5e4;border-bottom:1px solid #e7e5e4;padding:14px 0;margin:18px 0;line-height:1.6;text-align:center}

.col-img{margin:18px 0;border-radius:8px;overflow:hidden;border:1px solid #e7e5e4;box-shadow:0 2px 8px rgba(28,25,23,.04)}
.col-img img{width:100%}
.col-img figcaption{font-size:.78rem;color:#78716c;padding:9px 14px;background:#fafaf9;text-align:center}

.col-steps{counter-reset:sc;margin:14px 0;padding:0;list-style:none}
.col-steps li{counter-increment:sc;padding:11px 0 11px 40px;position:relative;border-bottom:1px dashed #e7e5e4;font-size:.94rem}
.col-steps li::before{content:counter(sc);position:absolute;left:0;top:11px;width:26px;height:26px;background:#0f766e;color:#fff;border-radius:4px;font-size:.78rem;font-weight:700;display:flex;align-items:center;justify-content:center}

.col-faq{padding:30px 0 14px;margin-top:6px}
.col-faq>h2{font-size:1.12rem;margin-bottom:16px;padding-bottom:8px;position:relative}
.col-faq>h2::after{content:"";position:absolute;left:0;bottom:0;width:36px;height:3px;background:linear-gradient(90deg,#0f766e,#5eead4);border-radius:2px}
.faq-row{border-bottom:1px solid #f5f5f4;padding:13px 0}
.faq-row h3{font-size:.98rem;margin-bottom:7px;color:#1c1917}
.faq-row p{font-size:.93rem;color:#57534e;margin:0}

.col-more{padding:22px 0;border-top:3px double #d6d3d1;margin-top:10px}
.col-more h2{font-size:1.02rem;margin-bottom:10px;color:#44403c}
.col-more ul{padding-left:1.15rem;line-height:1.9;font-size:.93rem}

.site-footer{background:#fafaf9;border-top:1px solid #e7e5e4;padding:26px 18px;text-align:center;font-size:.86rem;color:#78716c}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-bottom:10px}
.footer-sub{font-size:.8rem;color:#a8a29e;margin-top:6px}
.prose-page{max-width:640px;margin:40px auto;padding:0 18px}
.prose-page h1{font-size:1.35rem;margin-bottom:16px}
.error-page{max-width:480px;margin:80px auto;padding:0 18px;text-align:center}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #e7e5e4;padding:12px 18px;box-shadow:0 6px 20px rgba(0,0,0,.05)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:10px}
  .header-inner{position:relative;flex-wrap:wrap}
  .col-rail{top:50px}
  .col-rail a{font-size:.72rem;padding:4px 9px}
}