*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1c1917;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 #ccfbf1;position:sticky;top:0;z-index:200;box-shadow:0 1px 0 rgba(15,118,110,.06)}
.header-inner{max-width:1060px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:11px;color:#134e4a;font-weight:600;font-size:.97rem}
.brand em{font-style:normal;color:#0d9488;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none}
.site-nav a{color:#444;font-size:.91rem;padding:4px 0;border-bottom:2px solid transparent}
.site-nav a.active{color:#0f766e;border-bottom-color:#14b8a6;font-weight:600}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:#134e4a;margin:5px 0;border-radius:2px;transition:transform .2s}

.ads-top-bar{background:#f0fdfa;border-bottom:1px solid #99f6e4;padding:12px 0}
#applist .applist-title{font-size:.84rem;color:#5eead4;margin-bottom:8px;font-weight:500}
#ads{display:flex;flex-wrap:wrap;gap:14px}

.zig-shell{max-width:1060px;margin:0 auto;padding:0 22px 56px}
.hero-band{background:linear-gradient(135deg,#ecfdf5 0%,#fff 55%,#f0fdfa 100%);padding:42px 22px 32px;margin-bottom:4px;border-bottom:1px solid #a7f3d0}
.hero-band h1{font-size:clamp(1.38rem,3.8vw,1.92rem);line-height:1.32;margin-bottom:16px;color:#134e4a;letter-spacing:-.02em}
.hero-tag{display:inline-block;font-size:.8rem;color:#115e59;background:#ccfbf1;padding:5px 14px;border-radius:6px;margin-bottom:14px;font-weight:500;border:1px solid #99f6e4}
.lede{font-size:1.03rem;color:#444;max-width:680px}

.jump-nav{margin:28px 0 8px;padding:18px 0;border-top:1px dashed #99f6e4;border-bottom:1px dashed #99f6e4}
.jump-nav h2{font-size:.95rem;color:#0f766e;margin-bottom:12px;font-weight:600}
.jump-pills{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.jump-pills a{display:inline-block;font-size:.86rem;color:#134e4a;background:#f0fdfa;border:1px solid #5eead4;padding:6px 14px;border-radius:20px;transition:background .15s}
.jump-pills a:hover{background:#ccfbf1;text-decoration:none}

.zig-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:center;padding:40px 0;position:relative}
.zig-row::before{content:attr(data-step);position:absolute;top:40px;left:-8px;font-size:2.4rem;font-weight:700;color:#ccfbf1;line-height:1;pointer-events:none;z-index:0}
.zig-row:nth-child(even){background:linear-gradient(90deg,transparent 0%,#f0fdfa 50%,transparent 100%);margin:0 -22px;padding-left:22px;padding-right:22px}
.zig-row.reverse .zig-copy{order:2}
.zig-row.reverse .zig-visual{order:1}
.zig-copy{position:relative;z-index:1}
.zig-copy h2{font-size:1.18rem;margin-bottom:14px;color:#134e4a;padding-left:12px;border-left:4px solid #14b8a6}
.zig-copy p{margin-bottom:13px;color:#333;font-size:.98rem}
.zig-visual figure{margin:0;border-radius:14px;overflow:hidden;border:1px solid #ccfbf1;box-shadow:0 8px 24px rgba(15,118,110,.08)}
.zig-visual figcaption{font-size:.81rem;color:#64748b;margin-top:10px;text-align:center;padding:0 8px}

.note-box{background:#fff;border:1px solid #99f6e4;border-radius:10px;padding:16px 18px;margin:18px 0;font-size:.94rem;color:#334155}
.note-box strong{color:#0f766e}

.faq-block{padding:40px 0 28px;border-top:2px solid #ccfbf1;margin-top:12px}
.faq-block h2{font-size:1.22rem;margin-bottom:20px;color:#134e4a}
.faq-item{background:#fff;border:1px solid #e2e8f0;border-left:4px solid #14b8a6;border-radius:0 10px 10px 0;padding:18px 20px;margin-bottom:14px}
.faq-item h3{font-size:1rem;margin-bottom:9px;color:#134e4a}

.related{padding:28px 0 8px}
.related h2{font-size:1.05rem;margin-bottom:12px;color:#0f766e}
.related ul{padding-left:1.25rem;line-height:2;color:#444}

.site-footer{background:#f0fdfa;border-top:2px solid #99f6e4;padding:30px 22px;text-align:center;font-size:.87rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;margin-bottom:12px}
.footer-sub{font-size:.82rem;color:#94a3b8;margin-top:6px}
.prose-page{max-width:700px;margin:44px auto;padding:0 22px}
.prose-page h1{font-size:1.42rem;margin-bottom:18px;color:#134e4a}
.error-page{max-width:480px;margin:80px auto;padding:0 22px;text-align:center}
.error-page h1{font-size:3rem;color:#14b8a6;margin-bottom:12px}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid #ccfbf1;display:none;padding:14px 22px;box-shadow:0 8px 16px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-header{position:relative}
  .zig-row{grid-template-columns:1fr;gap:20px;padding:32px 0}
  .zig-row::before{font-size:1.8rem;top:28px;left:0}
  .zig-row.reverse .zig-copy,.zig-row.reverse .zig-visual{order:unset}
  .zig-row:nth-child(even){margin:0;padding-left:0;padding-right:0}
}