*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
:root{
  --teal:#0d9488;--teal-dark:#0f766e;--teal-soft:#ecfdf5;
  --violet:#6d28d9;--violet-soft:#f5f3ff;
  --ink:#134e4a;--text:#1e293b;--muted:#64748b;--line:#99f6e4;--white:#fff;
  --tile-a:repeating-linear-gradient(90deg,transparent,transparent 10px,rgba(13,148,136,.05) 10px,rgba(13,148,136,.05) 20px);
  --tile-b:repeating-linear-gradient(0deg,transparent,transparent 10px,rgba(109,40,217,.04) 10px,rgba(109,40,217,.04) 20px)
}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:var(--text);line-height:1.78;font-size:16px}
a{color:var(--teal-dark);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:3px solid var(--teal);position:sticky;top:0;z-index:300;box-shadow:0 2px 12px rgba(13,148,136,.08)}
.header-inner{max-width:1140px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:600;font-size:.92rem;max-width:360px}
.brand:hover{text-decoration:none}
.brand img{border-radius:12px;border:2px solid var(--line)}
.brand em{font-style:normal;color:var(--violet);font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:var(--muted);font-size:.88rem;padding:4px 0}
.site-nav a.active,.site-nav a:hover{color:var(--teal-dark);font-weight:600;border-bottom:2px solid var(--teal);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:.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:var(--teal-soft);border-bottom:1px solid var(--line);padding:10px 0}
.applist-title{font-size:.78rem;color:var(--teal-dark);text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}

.page-shell{max-width:1140px;margin:0 auto;padding:24px 20px 52px}

.chapter-nav{
  display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;
  padding:14px 16px;background:var(--violet-soft);border-radius:16px;border:1px solid #ddd6fe
}
.chapter-nav a{
  font-size:.8rem;padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid #c4b5fd;color:var(--ink);transition:all .15s
}
.chapter-nav a:hover{background:var(--violet);color:#fff;border-color:var(--violet);text-decoration:none;font-weight:600}

.tile-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:2px;
  background:linear-gradient(135deg,var(--teal) 0%,var(--violet) 100%);
  border-radius:24px;padding:3px;
  box-shadow:0 12px 40px rgba(13,148,136,.12)
}
.tile-cell{padding:24px 22px;min-height:180px;background:var(--white);position:relative}
.tile-cell:nth-child(6n+1){background-image:var(--tile-a)}
.tile-cell:nth-child(6n+2){background-image:var(--tile-b)}
.tile-cell:nth-child(6n+3){background-image:var(--tile-b)}
.tile-cell:nth-child(6n+4){background-image:var(--tile-a)}
.tile-cell:nth-child(6n+5){background-image:var(--tile-a)}
.tile-cell:nth-child(6n){background-image:var(--tile-b)}
.tile-cell:first-child{border-radius:21px 21px 0 0}
.tile-cell:nth-last-child(2):nth-child(odd){border-radius:0 0 0 21px}
.tile-cell:last-child{border-radius:0 0 21px 21px}

.tile-cell--lead{
  grid-column:1/-1;
  background:linear-gradient(120deg,#042f2e 0%,var(--teal) 40%,var(--violet) 100%);
  background-image:none;color:#fff;padding:34px 30px;border-radius:21px 21px 0 0
}
.tile-cell--lead::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 85% 15%,rgba(255,255,255,.12) 0%,transparent 50%);
  pointer-events:none
}
.tile-cell--lead>*{position:relative;z-index:1}
.tile-cell--lead h1{font-size:clamp(1.28rem,3.4vw,1.88rem);line-height:1.36;margin-bottom:14px;color:#fff}
.tile-cell--lead .hero-badge{
  display:inline-block;font-size:.74rem;font-weight:700;
  color:var(--teal-dark);background:#fff;
  padding:5px 16px;border-radius:999px;margin-bottom:14px
}
.tile-cell--lead p{color:#ccfbf1;font-size:.98rem;margin-bottom:10px;text-align:justify}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip-row span{font-size:.75rem;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.25)}

.tile-cell--wide{grid-column:1/-1;background:var(--teal-soft)}
.tile-cell h2{font-size:1.05rem;color:var(--ink);margin-bottom:10px;line-height:1.38;padding-left:11px;border-left:4px solid var(--violet)}
.tile-cell p{margin-bottom:10px;text-align:justify;color:#334155;font-size:.94rem}
.tile-cell p:last-child{margin-bottom:0}
.tile-cell figure{margin:14px 0 0;border-radius:14px;overflow:hidden;border:2px solid var(--line);background:#fff}
.tile-cell figcaption{font-size:.78rem;color:var(--muted);padding:8px 14px;background:var(--teal-soft)}

.note-box{
  background:#fff;border:2px dashed var(--teal);border-radius:12px;
  padding:12px 16px;margin:12px 0 0;font-size:.9rem;color:var(--teal-dark)
}

.faq-panel{margin-top:36px;padding:28px 24px;background:var(--violet-soft);border-radius:20px;border:1px solid #ddd6fe}
.faq-panel>h2{font-size:1.12rem;margin-bottom:16px;color:var(--ink)}
.faq-item{border:1px solid #c4b5fd;margin-bottom:10px;background:#fff;border-radius:12px;overflow:hidden}
.faq-item h3{padding:13px 17px;font-size:.95rem;font-weight:600;color:var(--violet);background:#faf5ff;border-bottom:1px solid #ede9fe}
.faq-item p{padding:13px 17px;color:#475569;font-size:.92rem}

.read-more{max-width:1140px;margin:0 auto;padding:0 20px 32px}
.read-more h2{font-size:1rem;margin-bottom:12px;color:var(--ink)}
.read-more ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px 18px}
.read-more a{font-size:.88rem}

.extra-pad{max-width:1140px;margin:0 auto;padding:0 20px 40px}
.extra-pad h2{font-size:1rem;margin-bottom:10px;color:var(--ink)}
.extra-pad p{text-align:justify;color:#475569;font-size:.93rem}

.prose-page{max-width:740px;margin:0 auto;padding:48px 20px 60px}
.prose-page h1{font-size:1.38rem;color:var(--ink);margin-bottom:16px}
.prose-page h2{font-size:1.05rem;color:var(--teal-dark);margin:18px 0 10px}
.prose-page p{margin-bottom:12px;color:#475569}

.error-page{max-width:740px;margin:4rem auto;padding:2rem 1.2rem;text-align:center}
.error-page h1{font-size:3rem;color:var(--teal);margin-bottom:.5rem}

.site-footer{background:var(--teal-soft);border-top:3px solid var(--teal);padding:28px 20px;text-align:center;font-size:.86rem;color:var(--muted)}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 16px;margin-bottom:10px}

@media(max-width:860px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid var(--line);padding:12px 20px;display:none;box-shadow:0 8px 20px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:10px}
  .tile-cell{padding:18px 16px;min-height:auto}
  .tile-cell--lead{padding:26px 20px}
}