*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1a1a1a;line-height:1.78;font-size:16px}
a{color:#0d9488;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:300}
.header-inner{max-width:1140px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:600;font-size:.96rem}
.brand em{font-style:normal;color:#0d9488;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:#444;font-size:.92rem}
.site-nav a.active{color:#0d9488;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:#333;margin:5px 0;border-radius:1px}

.ads-top-bar{background:#f0fdfa;border-bottom:1px solid #ccfbf1;padding:10px 0}
#applist .applist-title{font-size:.85rem;color:#666;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:12px}

.pc-hero{background:linear-gradient(160deg,#ecfdf5 0%,#fff 45%,#fff7ed 100%);padding:44px 20px 36px;border-bottom:1px solid #d1fae5;position:relative;overflow:hidden}
.pc-hero::before{content:"";position:absolute;left:-60px;bottom:-80px;width:240px;height:240px;background:radial-gradient(circle,#99f6e4 0%,transparent 70%);opacity:.45;pointer-events:none}
.pc-hero-inner{max-width:1140px;margin:0 auto;position:relative;z-index:1}
.pc-badge{display:inline-block;font-size:.8rem;color:#0f766e;background:#ccfbf1;padding:5px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:.02em}
.pc-hero h1{font-size:clamp(1.36rem,3.5vw,1.9rem);line-height:1.34;margin-bottom:16px;color:#111;max-width:840px}
.pc-lede{font-size:1.03rem;color:#444;max-width:800px;margin-bottom:12px}
.pc-lede:last-of-type{margin-bottom:0}

.pc-wrap{max-width:1140px;margin:0 auto;padding:0 20px 56px;display:grid;grid-template-columns:210px 1fr;gap:32px;align-items:start}
.pc-side{position:sticky;top:88px;padding-top:28px}
.pc-side h2{font-size:.88rem;color:#78716c;margin-bottom:12px;font-weight:600}
.pc-side ol{list-style:none;counter-reset:pc;border-left:3px solid #5eead4}
.pc-side li{counter-increment:pc}
.pc-side a{display:block;padding:8px 0 8px 14px;font-size:.84rem;color:#57534e;line-height:1.45;transition:color .15s}
.pc-side a::before{content:counter(pc);display:inline-flex;width:20px;height:20px;align-items:center;justify-content:center;background:#ccfbf1;color:#0f766e;font-size:.7rem;font-weight:700;border-radius:4px;margin-right:8px;margin-left:-24px;vertical-align:middle;border:2px solid #fff}
.pc-side a:hover,.pc-side a.is-active{color:#0d9488;text-decoration:none;font-weight:600}
.pc-side a.is-active::before{background:#0d9488;color:#fff}

.pc-body{display:flex;flex-direction:column;gap:0}

.pc-zz{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;padding:42px 24px;margin:0 -24px;border-bottom:1px solid #f3f4f6}
.pc-zz:nth-child(odd){background:linear-gradient(118deg,#f9fafb 0%,#fff 100%)}
.pc-zz:nth-child(even){background:linear-gradient(242deg,#ecfdf5 0%,#fff 100%)}
.pc-zz.flip .pc-zz-copy{order:2}
.pc-zz.flip .pc-zz-img{order:1}
.pc-zz-copy h2{font-size:1.17rem;margin-bottom:14px;color:#111;line-height:1.38}
.pc-zz-copy p{margin-bottom:12px;color:#333;font-size:.98rem}
.pc-zz-img figure{margin:0;border-radius:16px;overflow:hidden;box-shadow:0 10px 32px rgba(13,148,136,.1);border:1px solid #e5e7eb}
.pc-zz-img figcaption{font-size:.82rem;color:#78716c;margin-top:10px;text-align:center;padding:0 8px}

.pc-callout{background:#fff7ed;border-left:4px solid #f97316;padding:14px 18px;margin:14px 0;border-radius:0 10px 10px 0;font-size:.94rem;color:#444}

.pc-block{padding:36px 0;border-bottom:1px solid #f3f4f6}
.pc-block h2{font-size:1.15rem;margin-bottom:14px;color:#111}
.pc-block p{margin-bottom:12px;color:#333}

.pc-faq{padding:40px 0}
.pc-faq h2{font-size:1.15rem;margin-bottom:18px}
.pc-faq-item{border:1px solid #e5e7eb;border-radius:12px;padding:18px 20px;margin-bottom:14px;background:#fff}
.pc-faq-item h3{font-size:1rem;margin-bottom:8px;color:#111}
.pc-faq-item p{color:#444;font-size:.96rem;margin:0}

.pc-more{padding:28px 0;border-top:1px solid #e5e7eb}
.pc-more h2{font-size:1.02rem;margin-bottom:12px}
.pc-more ul{padding-left:1.25rem;line-height:1.95;color:#444}

.site-footer{background:#fafafa;border-top:1px solid #e5e7eb;padding:28px 20px;text-align:center;font-size:.88rem;color:#666}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:10px}
.footer-sub{font-size:.82rem;color:#999;margin-top:6px}
.prose-page{max-width:720px;margin:40px auto;padding:0 20px}
.prose-page h1{font-size:1.4rem;margin-bottom:16px}
.error-page{max-width:480px;margin:80px auto;padding:0 20px;text-align:center}

@media(max-width:900px){
  .pc-wrap{grid-template-columns:1fr;gap:0}
  .pc-side{position:static;padding:20px 0 8px;border-bottom:1px solid #eee;margin-bottom:8px}
  .pc-side ol{display:flex;flex-wrap:wrap;gap:8px;border-left:none}
  .pc-side li{margin:0}
  .pc-side a{padding:6px 14px;border:1px solid #e5e7eb;border-radius:20px;background:#f9fafb;margin:0}
  .pc-side a::before{display:none}
  .pc-zz{grid-template-columns:1fr;gap:18px;padding:32px 0;margin:0}
  .pc-zz.flip .pc-zz-copy,.pc-zz.flip .pc-zz-img{order:unset}
}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #eee;display:none;padding:12px 20px;z-index:250}
  .site-nav.is-open{display:block}
  .site-header{position:relative}
}