/* BetterLab 益研：文章頁共用樣式（與首頁同一套色彩與字體） */
:root{
  --paper:#F5F8F7; --paper-2:#E8EFEE; --ink:#15262A; --ink-soft:#4A5D60;
  --teal:#1E5055; --teal-deep:#123238; --line:#9DB8B5; --amber:#E3A21A; --amber-ink:#3A2A00;
  --white:#FFFFFF; --note:#FFF6DD; --wrap:1120px; --read:720px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans TC",system-ui,sans-serif;font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:var(--teal)}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(245,248,247,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--paper-2)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:baseline;gap:10px;text-decoration:none;color:var(--ink)}
.brand b{font-family:Outfit,sans-serif;font-size:22px;letter-spacing:-.01em}
.brand span{font-size:14px;color:var(--ink-soft)}
.nav{display:flex;gap:24px;align-items:center}
.nav a{text-decoration:none;color:var(--ink);font-size:15px}
.nav a[aria-current="page"]{color:var(--teal);font-weight:700}
.btn{display:inline-block;border:0;cursor:pointer;text-decoration:none;background:var(--amber);color:var(--amber-ink);font-weight:700;font-size:16px;padding:12px 22px;border-radius:4px;font-family:inherit}
.btn:hover{background:#F0B337}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.nav .btn{padding:8px 16px;font-size:15px}
@media (max-width:760px){.nav a:not(.btn){display:none}}

/* article head */
.a-head{background:var(--teal-deep);color:#fff;padding-block:56px 48px}
.crumb{font-size:14px;color:#BFD4D1;margin:0 0 18px}
.crumb a{color:#BFD4D1}
.a-head h1{font-size:clamp(28px,4.2vw,44px);line-height:1.3;font-weight:900;margin:0 0 18px;max-width:22em;text-wrap:balance}
.a-meta{display:flex;flex-wrap:wrap;gap:6px 20px;font-size:14px;color:#BFD4D1}
.tag{display:inline-block;font-size:13px;font-weight:700;color:var(--amber-ink);background:var(--note);padding:2px 10px;border-radius:3px}

/* body grid */
.a-body{display:grid;grid-template-columns:minmax(0,var(--read)) 260px;gap:64px;padding-block:56px 72px;justify-content:space-between}
.a-main{min-width:0}
.lead{font-size:19px;color:var(--ink);margin:0 0 36px;padding-bottom:28px;border-bottom:1px solid var(--paper-2)}
.a-main h2{font-size:24px;line-height:1.45;margin:52px 0 14px;font-weight:900;display:flex;gap:14px;align-items:baseline;scroll-margin-top:84px}
.a-main h2 .n{flex:none;font-family:Outfit,sans-serif;font-size:15px;font-weight:700;color:#fff;background:var(--teal);width:30px;height:30px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;transform:translateY(-3px)}
.a-main p{margin:0 0 16px}
.verify{background:var(--white);border:1px solid var(--paper-2);border-radius:8px;padding:18px 22px;margin:20px 0 8px}
.verify .vt{font-size:14px;font-weight:700;color:var(--teal);margin:0 0 8px}
.verify ul{list-style:none;margin:0;padding:0}
.verify li{display:flex;gap:12px;padding:6px 0;font-size:16px;line-height:1.7}
.verify li::before{content:"";flex:none;width:16px;height:16px;border:2px solid var(--teal);border-radius:3px;margin-top:6px}
.story{margin:18px 0 0;padding:14px 18px;background:var(--note);border-radius:6px;font-size:15px;color:var(--ink)}
.story b{color:var(--amber-ink)}
.closing{margin-top:56px;padding-top:28px;border-top:1px solid var(--paper-2)}
.disclaimer{font-size:13px;color:var(--ink-soft);margin-top:28px}

/* sidebar */
.toc{position:sticky;top:88px;align-self:start;font-size:15px}
.toc p{font-weight:700;margin:0 0 10px}
.toc ol{margin:0;padding:0;list-style:none;border-left:2px solid var(--paper-2)}
.toc li a{display:block;padding:6px 0 6px 14px;text-decoration:none;color:var(--ink-soft);line-height:1.5}
.toc li a:hover{color:var(--teal)}
.side-cta{margin-top:28px;background:var(--white);border:1px solid var(--paper-2);border-radius:8px;padding:18px}
.side-cta p{font-weight:400;font-size:14px;color:var(--ink-soft);margin:0 0 12px}
.side-cta .btn{display:block;text-align:center;font-size:15px;padding:10px 12px}
@media (max-width:960px){.a-body{grid-template-columns:minmax(0,1fr)}.toc{display:none}}

/* cta band */
.band{background:var(--teal);color:#fff;padding-block:56px}
.band .wrap{display:flex;flex-wrap:wrap;gap:24px 48px;align-items:center;justify-content:space-between}
.band h2{margin:0 0 8px;font-size:clamp(22px,3vw,30px);line-height:1.4;font-weight:900}
.band p{margin:0;color:#D6E6E4;max-width:34em}
.band .acts{display:flex;gap:12px;flex-wrap:wrap}

/* list page */
.list-head{background:var(--teal-deep);color:#fff;padding-block:56px 44px}
.list-head h1{font-size:clamp(28px,4vw,42px);margin:0 0 10px;font-weight:900}
.list-head p{margin:0;color:#CFE0DE;max-width:34em}
.list{padding-block:48px 72px;display:grid;gap:40px}
.post{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 32px;align-items:start;background:var(--white);border:1px solid var(--paper-2);border-radius:10px;padding:28px}
.post h2{margin:6px 0 8px;font-size:22px;line-height:1.45}
.post h2 a{color:var(--ink);text-decoration:none}
.post h2 a:hover{color:var(--teal)}
.post p{margin:0;color:var(--ink-soft);font-size:16px}
.post .read{align-self:center;white-space:nowrap}
@media (max-width:700px){.post{grid-template-columns:1fr}.post .read{justify-self:start}}
.soon h2{font-size:18px;margin:0 0 14px}
.soon ul{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.soon li{padding:12px 0;border-bottom:1px solid var(--paper-2);color:var(--ink-soft);display:flex;justify-content:space-between;gap:12px}
.soon li span{font-size:13px;color:var(--line);white-space:nowrap}
@media (max-width:700px){.soon ul{grid-template-columns:1fr}}

footer{padding-block:40px;font-size:14px;color:var(--ink-soft)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.todo{background:#FFF1C9;padding:0 .25em;border-radius:2px}