*,*::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:#1e293b;line-height:1.82;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 #ccfbf1;position:sticky;top:0;z-index:500;box-shadow:0 1px 0 rgba(13,148,136,.06)}
.header-inner{max-width:640px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#0f172a;font-weight:600;font-size:.88rem;line-height:1.36}
.brand em{font-style:normal;color:#0d9488;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 14px;list-style:none}
.site-nav a{color:#64748b;font-size:.86rem;padding:2px 0}
.site-nav a.active,.site-nav a:hover{color:#0d9488;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:#0f172a;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:.76rem;color:#64748b;text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}

.stream{max-width:640px;margin:0 auto;padding:0 20px 72px}
.stream-rail{position:sticky;top:56px;z-index:300;background:rgba(255,255,255,.97);backdrop-filter:blur(6px);border-bottom:1px solid #e2e8f0;padding:12px 0 14px;margin-bottom:4px}
.stream-rail ul{display:flex;flex-wrap:wrap;gap:6px 8px;list-style:none}
.stream-rail a{font-size:.72rem;color:#475569;background:#f8fafc;padding:4px 11px;border-radius:6px;border:1px solid #e2e8f0;white-space:nowrap;transition:all .15s}
.stream-rail a:hover{color:#fff;background:#0d9488;border-color:#0d9488;text-decoration:none}

.stream-hero{padding:36px 0 28px;border-bottom:2px solid #f1f5f9;scroll-margin-top:88px}
.stream-badge{display:inline-block;font-size:.74rem;color:#0f766e;background:#ecfdf5;border:1px solid #6ee7b7;padding:4px 14px;border-radius:20px;margin-bottom:16px;letter-spacing:.02em}
.stream-hero h1{font-size:clamp(1.32rem,4vw,1.88rem);line-height:1.38;margin-bottom:16px;color:#0f172a;font-weight:700}
.stream-lead{font-size:.98rem;color:#334155;margin-bottom:12px;text-align:justify}

.stream-sect{padding:28px 0;border-bottom:1px solid #f1f5f9;scroll-margin-top:88px;border-left:3px solid transparent;padding-left:16px;margin-left:-16px;transition:border-color .2s}
.stream-sect:hover{border-left-color:#5eead4}
.stream-sect h2{font-size:1.08rem;margin-bottom:14px;color:#0f172a;line-height:1.42}
.stream-sect p{margin-bottom:12px;color:#334155;font-size:.94rem;text-align:justify}

.stream-tip{background:linear-gradient(135deg,#f0fdfa,#fff);border:1px solid #99f6e4;border-radius:10px;padding:14px 18px;margin:16px 0;font-size:.9rem;color:#115e59;line-height:1.7}

.stream-fig{margin:20px 0;border-radius:12px;overflow:hidden;border:1px solid #e2e8f0;box-shadow:0 6px 24px rgba(15,23,42,.06)}
.stream-fig img{width:100%;aspect-ratio:16/9;object-fit:cover}
.stream-fig figcaption{font-size:.76rem;color:#64748b;padding:10px 16px;background:#f8fafc;line-height:1.5}

.stream-faq{padding:32px 0 20px;scroll-margin-top:88px}
.stream-faq>h2{font-size:1.06rem;margin-bottom:18px;color:#0f172a;padding-bottom:8px;border-bottom:2px solid #ccfbf1}
.faq-block{padding:14px 0;border-top:1px solid #f1f5f9}
.faq-block:first-of-type{border-top:none;padding-top:0}
.faq-block h3{font-size:.95rem;font-weight:600;color:#0f172a;margin-bottom:7px}
.faq-block p{font-size:.9rem;color:#475569;margin:0;line-height:1.72}

.stream-outro{padding:28px 0 8px;margin-top:6px;border-top:2px solid #f1f5f9}
.stream-outro h2{font-size:1rem;margin-bottom:12px;color:#0f172a}
.stream-outro p{font-size:.91rem;color:#475569;margin-bottom:10px;text-align:justify}

.read-more{max-width:640px;margin:0 auto;padding:0 20px 40px}
.read-more-title{font-size:.95rem;margin-bottom:12px;color:#64748b;font-weight:600}
.read-more ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px 16px}
.read-more a{font-size:.87rem;color:#0d9488}

.site-footer{background:#f8fafc;border-top:1px solid #e2e8f0;padding:26px 20px;text-align:center;font-size:.84rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 16px;margin-bottom:10px}
.footer-sub{font-size:.76rem;color:#94a3b8;margin-top:6px}

.prose-page{max-width:640px;margin:36px auto;padding:0 20px 44px}
.prose-page h1{font-size:1.34rem;margin-bottom:14px;color:#0f172a}
.prose-page h2{font-size:1.05rem;margin:18px 0 10px;color:#0f172a}
.prose-page p{margin-bottom:11px;color:#334155;font-size:.93rem}

.error-page{max-width:640px;margin:60px auto;padding:0 20px;text-align:center}
.error-page h1{font-size:3rem;color:#0d9488;margin-bottom:12px}
.error-page p{margin-bottom:10px;color:#64748b}

@media(max-width:720px){
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #ccfbf1;padding:12px 20px;box-shadow:0 6px 20px rgba(15,23,42,.06);z-index:490}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:4px}
  .stream-rail{top:50px}
  .stream-hero{padding:26px 0 22px}
}