/* Pro Minimal - Main CSS - Mobile First, Professional Slate + Sky */
:root{
  --color-primary:#0F172A;
  --color-primary-soft:#1E293B;
  --color-accent:#0EA5E9;
  --color-accent-hover:#0284C7;
  --color-bg:#FFFFFF;
  --color-bg-soft:#F8FAFC;
  --color-muted:#64748B;
  --color-muted-2:#94A3B8;
  --color-border:#E2E8F0;
  --color-border-strong:#CBD5E1;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 3px rgba(15,23,42,.08), 0 8px 24px rgba(15,23,42,.06);
  --shadow-hover:0 4px 12px rgba(15,23,42,.12), 0 12px 32px rgba(15,23,42,.08);
  --header-h:64px;
  --container:1280px;
  --content:720px;
  --font-sans: Inter, "Noto Sans HK", "PingFang HK", "Microsoft JhengHei", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Reset */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);font-size:clamp(15px,1.05vw,17px);line-height:1.7;color:var(--color-primary);background:var(--color-bg);-webkit-font-smoothing:antialiased}
img,video{max-width:100%;height:auto;display:block}
a{color:var(--color-accent);text-decoration:none}
a:hover{color:var(--color-accent-hover)}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;font-weight:700;letter-spacing:-.02em}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,2.8vw,30px);margin-top:1.8em}
h3{font-size:clamp(18px,2vw,22px);margin-top:1.4em}
h4{font-size:16px;color:var(--color-primary-soft)}
small{font-size:.875em;color:var(--color-muted)}
:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--color-primary);color:#fff;padding:8px 16px;z-index:100}
.skip-link:focus{left:12px;top:12px}

/* Layout */
.container{max-width:var(--container);margin-inline:auto;padding-inline:clamp(16px,4vw,32px)}
.content-narrow{max-width:var(--content);margin-inline:auto}
.site-main{/* padding: clamp(24px,4vw,48px) 0 64px; */}
.grid{display:grid;gap:clamp(16px,3vw,32px)}
.grid-3{grid-template-columns:1fr}
.grid-2{grid-template-columns:1fr}
@media(min-width:768px){ .grid-3{grid-template-columns:repeat(2,1fr)} .grid-2{grid-template-columns:repeat(2,1fr)} }
@media(min-width:1024px){ .grid-3{grid-template-columns:repeat(3,1fr)} }

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--color-border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:16px}
.site-branding{display:flex;align-items:center;gap:12px;min-width:0}
.site-logo img{height:36px;width:auto}
.site-title{font-size:18px;font-weight:800;letter-spacing:-.03em;color:var(--color-primary);white-space:nowrap}
.site-title a{color:inherit}
.site-description{font-size:12px;color:var(--color-muted);display:none}
@media(min-width:768px){ .site-description{display:block} }
.site-nav{display:flex;align-items:center;gap:12px}
.nav-menu{display:none;list-style:none;margin:0;padding:0;gap:4px}
.nav-menu a{display:block;padding:10px 14px;border-radius:999px;font-size:14px;font-weight:600;color:var(--color-primary-soft);transition:.2s}
.nav-menu a:hover{background:var(--color-bg-soft);color:var(--color-primary)}
.nav-menu .current-menu-item a{background:var(--color-primary);color:#fff}
@media(min-width:1024px){ .nav-menu{display:flex} }
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--color-border);border-radius:10px;background:#fff;color:var(--color-primary);cursor:pointer}
@media(min-width:1024px){ .menu-toggle{display:none} }
.nav-drawer{display:none;position:fixed;inset:var(--header-h) 0 0 0;background:#fff;z-index:49;padding:16px;overflow:auto;border-top:1px solid var(--color-border)}
.nav-drawer.open{display:block}
.nav-drawer .nav-menu{display:flex;flex-direction:column}
.nav-drawer .nav-menu a{padding:14px 16px;border-radius:10px}

/* Lang switcher */
.lang-switcher{display:flex;gap:6px;align-items:center}
.lang-switcher a{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border:1px solid var(--color-border);border-radius:999px;font-size:12px;font-weight:600;color:var(--color-muted);background:#fff}
.lang-switcher a.is-active{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}
.lang-switcher img{width:16px;height:12px;object-fit:cover;border-radius:2px}

/* Hero */
.hero{padding:clamp(28px,6vw,72px) 0 clamp(20px,4vw,40px);background:linear-gradient(180deg, var(--color-bg-soft) 0%, #fff 100%);border-bottom:1px solid var(--color-border)}
.hero-inner{display:grid;gap:32px;align-items:center}
@media(min-width:1024px){ .hero-inner{grid-template-columns:1.1fr .9fr} }
.hero h1{margin:0 0 12px}
.hero p{color:var(--color-muted);font-size:clamp(16px,1.6vw,19px);margin:0 0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:999px;font-size:14px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:.2s;min-height:44px}
.btn-primary{background:var(--color-primary);color:#fff}
.btn-primary:hover{background:var(--color-primary-soft);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--color-border);color:var(--color-primary)}
.btn-ghost:hover{border-color:var(--color-border-strong);background:var(--color-bg-soft)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-media{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:var(--color-bg-soft);aspect-ratio:1.6}
.hero-media img{width:100%;height:100%;object-fit:cover}

/* Card */
.card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column;position:relative}
.card h2 a::after{content:"";position:absolute;inset:0}
.card:focus-within{box-shadow:var(--shadow-hover);border-color:var(--color-border-strong)}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--color-border-strong)}
.card-media{aspect-ratio:1.5;overflow:hidden;background:var(--color-bg-soft);position:relative}
.card-media img{width:100%;height:100%;object-fit:cover;transition:.3s}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-kicker{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent)}
.card h2{margin:0;font-size:18px;line-height:1.35}
.card h2 a{color:var(--color-primary)}
.card h2 a:hover{color:var(--color-accent)}
.card p{color:var(--color-muted);font-size:14px;line-height:1.6;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;gap:12px;align-items:center;font-size:12px;/* color:var(--color-muted-2); */margin-top:auto;padding-top:8px;border-top:1px solid var(--color-border)}
.card-meta img{width:24px;height:24px;border-radius:999px}

/* Breadcrumb */
.breadcrumb{font-size:13px;color:var(--color-muted);padding:12px 0}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px;align-items:center}
.breadcrumb a{color:var(--color-muted)}
.breadcrumb a:hover{color:var(--color-primary)}
.breadcrumb .sep{color:var(--color-border-strong)}

/* Entry */
.entry-header{margin-bottom:24px}
.entry-title{margin:0 0 10px}
.entry-meta{display:flex;flex-wrap:wrap;gap:12px;/* font-size:13px; */color:var(--color-muted)}
.entry-meta a{color:inherit}
.entry-meta a:hover{color:var(--color-accent)}
.pro-summary{background:var(--color-bg-soft);border:1px solid var(--color-border);border-left:3px solid var(--color-accent);padding:16px;border-radius:var(--radius-sm);font-size:14px;color:var(--color-primary-soft);margin:16px 0}
.entry-content{font-size:16px}
.entry-content a{text-decoration:underline;text-underline-offset:3px}
.entry-content img{border-radius:var(--radius-sm)}
.entry-content blockquote{border-left:3px solid var(--color-accent);margin:24px 0;padding:12px 20px;background:var(--color-bg-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--color-primary-soft)}
.entry-content ul, .entry-content ol{padding-left:1.4em}
.entry-content li{margin:.4em 0}
.entry-content h2{border-bottom:1px solid var(--color-border);padding-bottom:.3em}

/* TOC / FAQ */
.faq{border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden;background:#fff;margin:24px 0}
.faq-head{padding:16px 20px;border-bottom:1px solid var(--color-border);font-weight:700;background:var(--color-bg-soft)}
.faq-item{border-bottom:1px solid var(--color-border)}
.faq-item:last-child{border-bottom:0}
.faq-q{width:100%;text-align:left;background:#fff;border:0;padding:16px 20px;font-size:15px;font-weight:600;display:flex;justify-content:space-between;align-items:center;cursor:pointer;color:var(--color-primary)}
.faq-q:hover{background:var(--color-bg-soft)}
.faq-a{padding:0 20px 16px;color:var(--color-muted);font-size:14px;line-height:1.7;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q{color:var(--color-accent)}

/* Sidebar */
.sidebar{position:sticky;top:calc(var(--header-h) + 24px)}
.widget{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:18px;margin-bottom:20px}
.widget-title{font-size:14px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--color-primary);margin:0 0 12px}
.widget ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.widget a{color:var(--color-primary-soft);font-size:14px}
.widget a:hover{color:var(--color-accent)}

/* Search */
.search-form{display:flex;gap:8px}
.search-form input{flex:1;padding:12px 14px;border:1px solid var(--color-border);border-radius:999px;font-size:14px;outline:none}
.search-form input:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px rgba(14,165,233,.15)}
.search-form button{padding:12px 18px;border-radius:999px;border:0;background:var(--color-primary);color:#fff;font-weight:700;cursor:pointer;min-height:44px}
.search-form button:hover{background:var(--color-primary-soft)}

/* Pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin:32px 0}
.pagination a, .pagination span{padding:10px 16px;border:1px solid var(--color-border);border-radius:999px;font-size:14px;font-weight:600;background:#fff;color:var(--color-primary)}
.pagination .current{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}
.pagination a:hover{border-color:var(--color-border-strong)}

/* Footer */
.site-footer{background:var(--color-primary);color:#CBD5E1;padding:48px 0 32px;margin-top:48px}
.site-footer a{color:#E2E8F0}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;gap:32px}
@media(min-width:768px){ .footer-grid{grid-template-columns:1.4fr .8fr .8fr} }
.footer-brand h3{color:#fff;margin:0 0 8px}
.footer-brand p{color:#94A3B8;font-size:14px}
.footer-title{font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#fff;margin:0 0 12px}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer-links a{font-size:14px;color:#CBD5E1}
.footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12px;color:#94A3B8}

/* 404 */
.error-404{text-align:center;padding:48px 20px}
.error-404 h1{font-size:clamp(48px,12vw,120px);line-height:1;margin:0;color:var(--color-primary)}
.error-404 p{color:var(--color-muted)}

/* Utilities */
.sr-only,.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.text-center{text-align:center}
.muted{color:var(--color-muted)}
.divider{height:1px;background:var(--color-border);margin:24px 0}
.lazy{opacity:0;transition:opacity .3s}
.lazy.loaded{opacity:1}

/* Reduced motion */
@media(prefers-reduced-motion:reduce){ *{scroll-behavior:auto;transition:none !important;animation:none !important} }

/* Print */
@media print{ .site-header,.site-footer,.sidebar,.breadcrumb{display:none} }