*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1a1a1a;line-height:1.76;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:2px solid #ccfbf1;position:sticky;top:0;z-index:200}
.header-inner{max-width:1140px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#1a1a1a;font-weight:500;font-size:.95rem}
.brand em{font-style:normal;color:#0f766e;font-weight:700}
.site-nav ul{display:flex;gap:18px;list-style:none;flex-wrap:wrap}
.site-nav a{color:#555;font-size:.9rem;padding:18px 0;display:block}
.site-nav a.active,.site-nav a:hover{color:#0f766e;font-weight:600;text-decoration:none}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#333;transition:transform .2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.ads-top-bar{background:#f0fdfa;border-bottom:1px solid #ccfbf1;padding:10px 0}
.applist-title{font-size:.78rem;color:#888;text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.ads-item figure{text-align:center;font-size:.72rem;color:#666}
.ads-item img{border-radius:8px}

.mosaic-wrap{max-width:1140px;margin:0 auto;padding:0 20px 52px}
.hero-mosaic{padding:36px 0 40px;border-bottom:3px solid #99f6e4;background:linear-gradient(135deg,#f0fdfa 0%,#fff 60%)}
.hero-mosaic .tag{display:inline-block;font-size:.72rem;color:#0f766e;border:1px solid #5eead4;background:#ecfdf5;padding:4px 12px;border-radius:4px;margin-bottom:14px}
.hero-mosaic h1{font-size:1.78rem;line-height:1.34;margin-bottom:16px;color:#111;max-width:720px}
.hero-mosaic .lede{color:#333;margin-bottom:12px;text-align:justify;max-width:760px}

.mosaic-row{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;padding:44px 0;border-bottom:1px dashed #ccfbf1;scroll-margin-top:80px}
.mosaic-row.reverse .mosaic-text{order:2}
.mosaic-row.reverse .mosaic-visual{order:1}
.mosaic-text h2{font-size:1.18rem;margin-bottom:14px;color:#134e4a}
.mosaic-text p{margin-bottom:12px;text-align:justify;color:#333;font-size:.97rem}
.mosaic-visual figure{border:2px solid #99f6e4;border-radius:12px;overflow:hidden;background:#f0fdfa}
.mosaic-visual figcaption{font-size:.8rem;color:#666;padding:8px 14px;background:#ecfdf5}

.mosaic-faq{padding:44px 0;scroll-margin-top:80px}
.mosaic-faq h2{font-size:1.2rem;margin-bottom:24px;color:#134e4a}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.faq-item{padding:18px;background:#f0fdfa;border-radius:10px;border-left:4px solid #14b8a6}
.faq-item p{margin-bottom:8px;font-size:.94rem;color:#333}
.closing-note{margin-top:28px;padding:22px;background:#ecfdf5;border-radius:10px;border:1px solid #99f6e4}
.closing-note h3{font-size:1rem;margin-bottom:10px;color:#111}
.closing-note p{font-size:.94rem;color:#444}

.site-footer{background:#f0fdfa;border-top:1px solid #ccfbf1;padding:28px 20px;text-align:center;font-size:.88rem;color:#666}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-bottom:10px}
.footer-sub{font-size:.8rem;color:#999;margin-top:4px}

.prose-page{max-width:760px;margin:0 auto;padding:32px 20px 48px}
.prose-page h1{font-size:1.45rem;margin-bottom:16px}
.prose-page p{margin-bottom:12px;color:#333}

@media(max-width:820px){
  .mosaic-row,.mosaic-row.reverse{grid-template-columns:1fr;gap:20px}
  .mosaic-row.reverse .mosaic-text,.mosaic-row.reverse .mosaic-visual{order:unset}
  .faq-grid{grid-template-columns:1fr}
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #eee;padding:12px 20px;box-shadow:0 4px 12px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:0}
}