/* 瑞恩設計知識庫 — Claymorphism（品牌琥珀黃亮色系）
   規格依 ui-ux-pro-max：radius 16-24px、3px 粗邊框、內外雙陰影、
   soft bounce cubic-bezier(0.34,1.56,0.64,1)、亮底不用純白、文字對比 ≥4.5:1 */
*{margin:0;padding:0;box-sizing:border-box;}
:root{
  /* 品牌色（logo 實測 #F9C051；主站 #FFC107/#E0A800/#00BCD4） */
  --brand:#F9C051; --brand-2:#FFC107; --brand-deep:#8A6100;
  --cyan:#00BCD4; --cyan-deep:#00758A;
  /* 變數名沿用舊版，值換新主題：--white=主文字、--body=內文、--gold=文字強調 */
  --white:#3D3021; --body:#5C4E38; --muted:#7A6C50;
  --gold:#8A6100; --gold-2:#B47D00; --gold-soft:#6B4C00;
  --ink:#FFF8EA; --ink-2:#FFF3D8;
  --line:#F2E2BC; --gold-line:#F0D08A;
  --card:#FFF6E0;
  --clay-card:#FFFFFF;
  --shadow-out:0 6px 0 rgba(197,155,58,0.18), 0 14px 28px rgba(197,155,58,0.16);
  --shadow-in:inset 0 -3px 0 rgba(197,155,58,0.10);
  --bounce:cubic-bezier(0.34,1.56,0.64,1);
  --font-head:"Fredoka","Noto Sans TC","PingFang TC",sans-serif;
  --serif:"Fredoka","Noto Sans TC",sans-serif;
}
html{scroll-behavior:smooth;}
body{
  font-family:"Nunito","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
  background:var(--ink);
  color:var(--white); line-height:1.9; letter-spacing:0.3px; min-height:100vh;
  position:relative;
}
/* 漂浮 clay 色塊背景 */
body::before,body::after{
  content:"";position:fixed;border-radius:50%;z-index:-1;filter:blur(60px);opacity:.55;
  animation:drift 18s var(--bounce) infinite alternate;
}
body::before{width:420px;height:420px;background:#FFE3A3;top:-120px;right:-100px;}
body::after{width:360px;height:360px;background:#C9F3F8;bottom:-140px;left:-120px;animation-delay:-9s;}
@keyframes drift{from{transform:translate(0,0) scale(1);}to{transform:translate(24px,20px) scale(1.06);}}
@media (prefers-reduced-motion: reduce){body::before,body::after{animation:none;}}

a{color:var(--gold);text-decoration:none;}
a:hover{color:var(--gold-2);}
img{max-width:100%;height:auto;}
.shell{max-width:1024px;margin:0 auto;padding:0 22px;}
.shell.narrow{max-width:768px;}

/* Header — clay 導覽列 */
.site-head{position:sticky;top:0;z-index:10;background:#FFFFFF;border-bottom:3px solid var(--line);box-shadow:0 4px 14px rgba(197,155,58,0.08);}
.head-in{display:flex;align-items:center;justify-content:space-between;height:70px;}
.logo{display:flex;align-items:center;gap:12px;}
.logo-h{display:block;height:48px;width:auto;transition:opacity .2s;}
.logo:hover .logo-h{opacity:.75;}
.logo-badge{font-family:var(--font-head);font-size:13px;font-weight:700;letter-spacing:3px;color:var(--brand-deep);background:#FFE9B8;border:3px solid var(--gold-line);border-radius:999px;padding:4px 14px;}
.nav{display:flex;gap:12px;font-size:14px;font-weight:700;}
.nav a{color:var(--body);padding:8px 16px;border-radius:999px;border:3px solid transparent;transition:all .2s var(--bounce);}
.nav a.on,.nav a:hover{color:var(--white);background:var(--card);border-color:var(--gold-line);}

/* Hero */
.hero{padding:64px 0 30px;}
.hero.small{padding:48px 0 22px;}
.hero-kicker{display:inline-block;font-size:13px;font-weight:800;letter-spacing:4px;color:var(--brand-deep);background:#FFE9B8;border:3px solid var(--gold-line);border-radius:999px;padding:5px 18px;margin-bottom:18px;}
.hero h1{font-family:var(--font-head);font-size:44px;font-weight:700;line-height:1.3;color:var(--white);}
.hero-sub{margin-top:12px;font-size:16px;color:var(--body);}
.empty{padding:60px 0;color:var(--muted);text-align:center;}

/* Category chips — clay 藥丸 */
.chips{display:flex;flex-wrap:wrap;gap:12px;padding:20px 0 10px;}
.chip{font-size:14px;font-weight:800;padding:9px 20px;border-radius:999px;border:3px solid var(--line);color:var(--body);background:var(--clay-card);box-shadow:0 4px 0 rgba(197,155,58,0.14);transition:all .22s var(--bounce);}
.chip span{color:var(--muted);font-size:12px;margin-left:3px;}
.chip:hover{transform:translateY(-3px);border-color:var(--gold-line);color:var(--white);box-shadow:0 7px 0 rgba(197,155,58,0.16);}
.chip.on{border-color:var(--brand);background:linear-gradient(135deg,#FFD97A,var(--brand));color:#4A3500;box-shadow:0 4px 0 rgba(197,155,58,0.32);}
.chip.on span{color:#6B4C00;}
.chip:active{transform:translateY(1px) scale(.97);box-shadow:0 2px 0 rgba(197,155,58,0.2);}

/* Cards — clay 卡片：白底、圓角 24、3px 邊、雙陰影、bounce hover */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;padding:28px 0 60px;}
.card{position:relative;border:3px solid var(--line);border-radius:24px;padding:28px 28px 20px;background:var(--clay-card);box-shadow:var(--shadow-out),var(--shadow-in);display:flex;flex-direction:column;gap:10px;transition:transform .25s var(--bounce),border-color .2s,box-shadow .25s var(--bounce);}
/* 標題連結延伸覆蓋整張卡片（stretched link），整區可點 */
.card-title a::after{content:"";position:absolute;inset:0;border-radius:24px;z-index:1;}
.card-cat{position:relative;z-index:2;}
.card:hover{border-color:var(--brand);transform:translateY(-6px);box-shadow:0 10px 0 rgba(197,155,58,0.2),0 20px 34px rgba(197,155,58,0.2);}
.card.featured{grid-column:1 / -1;background:linear-gradient(150deg,#FFFDF6,#FFF3D2);border-color:var(--brand);padding:36px 36px 24px;}
.card.featured .card-title{font-size:28px;}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);font-weight:700;}
.card-cat{font-weight:800;letter-spacing:1px;color:var(--brand-deep);background:#FFE9B8;border-radius:999px;padding:3px 13px;font-size:12.5px;}
.card-cat:hover{background:#FFD97A;color:#4A3500;}
.card-title{font-family:var(--font-head);font-size:20px;font-weight:700;line-height:1.55;}
.card-title a{color:var(--white);}
.card-title a:hover{color:var(--gold);}
.card-desc{font-size:14.5px;color:var(--body);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1;}
.card-foot{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);font-weight:700;border-top:3px dashed var(--line);padding-top:12px;margin-top:6px;}
.card-go{color:var(--gold);font-weight:800;}

/* Breadcrumbs */
.crumbs{display:flex;gap:10px;font-size:13.5px;font-weight:700;color:var(--muted);padding:26px 0 0;}

/* Article */
.post{padding:18px 0 10px;}
.post-head{padding:14px 0 26px;border-bottom:3px dashed var(--line);margin-bottom:30px;}
.post-head h1{font-family:var(--font-head);font-size:34px;font-weight:700;line-height:1.5;color:var(--white);}
.post-desc{margin-top:14px;font-size:16px;color:var(--body);}
.post-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;font-size:13.5px;font-weight:700;color:var(--muted);}
.post-meta a{color:var(--brand-deep);background:#FFE9B8;border-radius:999px;padding:2px 13px;}

/* Article body — 相容 Cowork 內容詞彙（.stat/.box/.note/.steps/.pts…） */
.post-body{font-size:16px;color:var(--body);}
.post-body p{margin:12px 0;}
.post-body section{margin-top:46px;}
.post-body h2{font-family:var(--font-head);font-size:24px;font-weight:700;color:var(--white);margin:6px 0 4px;line-height:1.55;}
.post-body h3{font-family:var(--font-head);font-size:19px;font-weight:700;color:var(--white);margin:22px 0 6px;}
.post-body .grp{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:3px;color:var(--cyan-deep);background:#DFF7FA;border:3px solid #B8EAF2;border-radius:999px;padding:3px 15px;margin-bottom:8px;}
.post-body .no{font-family:var(--font-head);font-size:16px;font-weight:700;color:var(--brand-deep);letter-spacing:2px;}
.post-body .solves{font-size:14.5px;font-weight:700;color:var(--gold-2);margin-bottom:12px;}
.post-body .stat{margin:30px 0 8px;padding:22px 24px;border:3px solid var(--gold-line);background:linear-gradient(140deg,#FFFDF6,#FFF0C8);border-radius:22px;font-size:14.5px;box-shadow:var(--shadow-out);}
.post-body .stat b{color:var(--brand-deep);}
.post-body .box{margin:16px 0;padding:18px 20px;border-radius:22px;border:3px solid var(--line);background:var(--clay-card);box-shadow:0 5px 0 rgba(197,155,58,0.12);}
.post-body .box b.tag{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:2px;color:var(--brand-deep);background:#FFE9B8;border-radius:999px;padding:2px 13px;margin-bottom:10px;}
.post-body ol,.post-body ul{margin:10px 0 10px 24px;}
.post-body li{margin:8px 0;font-size:15px;}
.post-body li::marker{color:var(--brand-deep);font-weight:800;}
.post-body .note{margin:14px 0;padding:15px 20px;border:3px solid #B8EAF2;border-radius:20px;background:#EDFAFC;font-size:14.5px;color:#134E5C;box-shadow:0 5px 0 rgba(0,150,170,0.10);}
.post-body blockquote{margin:16px 0;padding:14px 22px;border:3px dashed var(--gold-line);border-radius:20px;color:var(--body);background:#FFFDF6;}
.post-body a{border-bottom:2px dotted var(--gold-line);word-break:break-all;font-weight:700;}
.post-body .src{font-size:13px;color:var(--muted);margin-top:8px;}
.post-body .divider{height:3px;background:var(--line);border-radius:99px;margin:40px 0 0;border:0;}
.post-body hr{height:3px;background:var(--line);border-radius:99px;margin:40px 0;border:0;}
.post-body code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13.5px;background:#FFF0C8;padding:2px 8px;border-radius:8px;color:#6B4C00;}
.post-body pre{margin:14px 0;padding:18px 20px;border-radius:20px;background:#3D3021;border:3px solid #5C4E38;overflow-x:auto;box-shadow:var(--shadow-out);}
.post-body pre code{background:none;padding:0;color:#FFE9B8;}
.post-body table{width:100%;border-collapse:separate;border-spacing:0;margin:16px 0;font-size:14.5px;display:block;overflow-x:auto;}
.post-body th,.post-body td{border-bottom:3px solid var(--line);padding:10px 14px;text-align:left;}
.post-body th{color:var(--brand-deep);background:#FFF0C8;}
.post-body b,.post-body strong{color:var(--white);}

/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:10px;margin:30px 0 0;}
.tag-pill{font-size:13px;font-weight:800;color:var(--body);border:3px solid var(--line);background:var(--clay-card);border-radius:999px;padding:5px 15px;box-shadow:0 3px 0 rgba(197,155,58,0.12);}

/* CTA — clay 大卡 */
.post-cta,.foot-cta{margin-top:44px;padding:30px 32px;border:3px solid var(--brand);background:linear-gradient(150deg,#FFFDF6,#FFF0C8);border-radius:26px;box-shadow:var(--shadow-out);}
.post-cta h3,.foot-cta h3{font-family:var(--font-head);font-size:19px;font-weight:700;color:var(--brand-deep);margin-bottom:10px;}
.post-cta p,.foot-cta p{font-size:14.5px;color:var(--body);}
.btn{display:inline-block;margin-top:18px;padding:13px 28px;border-radius:18px;background:linear-gradient(135deg,#FFD97A,var(--brand-2));color:#4A3500;font-size:15px;font-weight:800;border:3px solid #E8AC28;box-shadow:0 6px 0 #D69E1F,0 12px 20px rgba(214,158,31,0.3);transition:all .18s var(--bounce);}
.btn:hover{transform:translateY(-3px);color:#4A3500;box-shadow:0 9px 0 #D69E1F,0 16px 26px rgba(214,158,31,0.34);}
.btn:active{transform:translateY(3px) scale(.97);box-shadow:0 2px 0 #D69E1F;}

/* Related */
.related{padding:50px 0 20px;}
.related h2{font-family:var(--font-head);font-size:22px;font-weight:700;margin-bottom:4px;color:var(--white);}
.related .grid{grid-template-columns:1fr;gap:16px;padding-top:16px;}

/* Footer */
.site-foot{margin-top:56px;padding:44px 0 32px;background:#FFF3D8;border-top:3px solid var(--gold-line);}
.foot-cta{margin-top:0;background:var(--clay-card);}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:28px;font-size:13px;font-weight:700;color:var(--muted);letter-spacing:1px;}
.foot-base a{color:var(--muted);}
.foot-base a:hover{color:var(--gold);}

@media(max-width:720px){
  .hero h1{font-size:33px;}
  .grid{grid-template-columns:1fr;}
  .card.featured .card-title{font-size:22px;}
  .post-head h1{font-size:26px;}
  .logo-h{height:40px;}
  .logo-badge{display:none;}
  .nav{gap:8px;font-size:13px;}
  .nav a{padding:6px 12px;}
}