*,*::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:#134e4a;line-height:1.82;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:2px solid #99f6e4;position:sticky;top:0;z-index:500;box-shadow:0 1px 0 rgba(15,118,110,.05)}
.header-inner{max-width:720px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:14px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#042f2e;font-weight:600;font-size:.91rem;line-height:1.35}
.brand em{font-style:normal;color:#0d9488;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 16px;list-style:none}
.site-nav a{color:#475569;font-size:.88rem;padding:2px 0}
.site-nav a.active,.site-nav a:hover{color:#0f766e;font-weight:600;text-decoration:none}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#134e4a;border-radius:1px;transition:transform .2s,opacity .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 #99f6e4;padding:10px 0}
.applist-title{font-size:.78rem;color:#64748b;text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}

.stream-wrap{max-width:720px;margin:0 auto;padding:0 20px 72px}
.stream-body{display:flex;flex-direction:column}

.stream-toc{position:sticky;top:58px;z-index:300;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid #ccfbf1;padding:12px 0 14px;margin-bottom:4px}
.stream-toc ul{display:flex;flex-wrap:wrap;gap:6px 8px;list-style:none}
.stream-toc a{font-size:.74rem;color:#475569;background:#f0fdfa;padding:5px 11px;border-radius:6px;border:1px solid #99f6e4;white-space:nowrap;transition:background .15s,border-color .15s,color .15s}
.stream-toc a.is-active,.stream-toc a:hover{color:#fff;background:#0d9488;border-color:#0d9488;text-decoration:none}

.stream-hero{padding:36px 0 30px;border-bottom:2px solid #0d9488;margin-bottom:4px;scroll-margin-top:90px}
.stream-badge{display:inline-block;font-size:.76rem;color:#0f766e;background:#ccfbf1;border:1px solid #5eead4;padding:5px 14px;border-radius:20px 4px 20px 4px;margin-bottom:16px;letter-spacing:.02em}
.stream-hero h1{font-size:clamp(1.38rem,4vw,1.95rem);line-height:1.34;margin-bottom:16px;color:#042f2e;font-weight:700}
.stream-lede{font-size:1rem;color:#134e4a;margin-bottom:12px;text-align:justify}

.stream-sect{padding:30px 0;border-bottom:1px solid #ecfdf5;scroll-margin-top:90px}
.stream-sect h2{font-size:1.12rem;margin-bottom:14px;color:#042f2e;padding-left:16px;border-left:4px solid #14b8a6;line-height:1.42}
.stream-sect p{margin-bottom:13px;color:#134e4a;font-size:.96rem;text-align:justify}

.stream-callout{background:linear-gradient(135deg,#ecfdf5 0%,#fff 100%);border:1px solid #99f6e4;border-left:4px solid #0d9488;padding:14px 18px;margin:16px 0;border-radius:0 10px 10px 0;font-size:.93rem;color:#134e4a}

.stream-fig{margin:20px 0;border-radius:14px;overflow:hidden;border:1px solid #99f6e4;box-shadow:0 6px 22px rgba(13,148,136,.1)}
.stream-fig img{width:100%;aspect-ratio:16/9;object-fit:cover}
.stream-fig figcaption{font-size:.78rem;color:#64748b;padding:10px 16px;background:#f0fdfa;line-height:1.5}

.stream-faq{padding:34px 0 20px;scroll-margin-top:90px}
.stream-faq>h2{font-size:1.1rem;margin-bottom:18px;padding-left:16px;border-left:4px solid #14b8a6;color:#042f2e}
.faq-item{padding:15px 0;border-top:1px solid #ecfdf5}
.faq-item:first-of-type{border-top:none;padding-top:0}
.faq-item h3{font-size:.97rem;font-weight:600;color:#042f2e;margin-bottom:8px}
.faq-item p{font-size:.92rem;color:#475569;margin:0;line-height:1.72}

.stream-tail{padding:30px 0 8px;border-top:2px solid #99f6e4;margin-top:6px}
.stream-tail h2{font-size:1.04rem;margin-bottom:12px;color:#042f2e}
.stream-tail p{font-size:.93rem;color:#475569;margin-bottom:10px;text-align:justify}

.site-footer{background:#f0fdfa;border-top:1px solid #99f6e4;padding:28px 20px;text-align:center;font-size:.86rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-bottom:10px}
.footer-sub{font-size:.78rem;color:#94a3b8;margin-top:6px}

.prose-page{max-width:720px;margin:40px auto;padding:0 20px 48px}
.prose-page h1{font-size:1.4rem;margin-bottom:16px;color:#042f2e}
.prose-page p{margin-bottom:12px;color:#334155}

@media(max-width:760px){
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #99f6e4;padding:14px 20px;box-shadow:0 8px 24px rgba(4,47,46,.08);z-index:490}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:4px}
  .stream-toc{top:52px}
  .stream-hero{padding:28px 0 24px}
}