:root{
  --bg:#f5f9f7;
  --surface:#ffffff;
  --text:#1b2a24;
  --muted:#5d7168;
  --border:#dde9e3;
  --border-strong:#c2d8cd;
  --accent:#047857;
  --accent-bright:#10b981;
  --accent-deep:#065f46;
  --accent-soft:#e9f7f0;
  --accent-ring:rgba(16,185,129,.18);
  --code-bg:#eef8f3;
  --radius:12px;
  --shadow-card:0 8px 24px rgba(6,95,70,.09);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Consolas,"Cascadia Mono","Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.8;counter-reset:sec}
body::before{content:"";position:fixed;top:0;left:0;right:0;height:3px;z-index:80;background:linear-gradient(90deg,#34d399,#047857 45%,#0d9488)}
a{color:var(--accent);text-decoration:none;transition:color .15s}
a:hover{color:var(--accent-deep)}
:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px;border-radius:4px}
::selection{background:#c6f0dd;color:#06432f}
img{max-width:100%;height:auto}
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:8px 14px;z-index:99;border-radius:0 0 8px 0}
.skip-link:focus{left:0;top:3px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--text);letter-spacing:.5px}
.brand:hover{text-decoration:none;color:var(--accent)}
.brand .mark{width:27px;height:27px;border-radius:8px;background:linear-gradient(135deg,#10b981,#047857);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;box-shadow:0 2px 8px rgba(4,120,87,.35)}
.main-nav{display:flex;align-items:center;gap:5px}
.main-nav a{color:var(--muted);font-size:15px;padding:8px 13px;border-radius:8px;transition:color .15s,background .15s}
.main-nav a:hover{color:var(--accent);background:var(--accent-soft);text-decoration:none}
.main-nav a.active{color:var(--accent);font-weight:600;background:var(--accent-soft);box-shadow:inset 0 0 0 1px #cfeede}
.nav-toggle{display:none;background:none;border:1px solid var(--border-strong);border-radius:8px;padding:7px 11px;font-size:15px;color:var(--text);cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;padding:96px 0 68px;overflow:hidden;background:
  radial-gradient(1000px 420px at 85% -12%,rgba(16,185,129,.15),transparent 62%),
  radial-gradient(800px 380px at 8% 112%,rgba(13,148,136,.10),transparent 60%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(4,120,87,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(4,120,87,.055) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 78%)}
.hero .wrap{position:relative;z-index:1}
.hero .eyebrow{font-family:var(--mono);color:var(--accent);font-size:13.5px;font-weight:600;letter-spacing:3px;margin:0 0 18px}
.hero .eyebrow::before{content:"// ";color:var(--accent-bright)}
.hero h1{font-size:clamp(30px,4.6vw,44px);line-height:1.32;margin:0 0 20px;font-weight:800;letter-spacing:.5px}
.hero h1 .hl{background:linear-gradient(120deg,#047857,#10b981 60%,#0d9488);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:var(--muted);max-width:660px;margin:0 0 34px;line-height:1.9}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .15s,box-shadow .15s,background .15s,color .15s,border-color .15s}
.btn-primary{background:linear-gradient(135deg,#10b981,#047857);color:#fff;box-shadow:0 4px 16px rgba(4,120,87,.28)}
.btn-primary:hover{color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 7px 22px rgba(4,120,87,.36)}
.btn-ghost{border-color:var(--border-strong);color:var(--text);background:var(--surface)}
.btn-ghost:hover{border-color:var(--accent-bright);color:var(--accent);text-decoration:none;background:var(--accent-soft)}

/* ---------- sections ---------- */
.section{padding:54px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:8px}
.section-head h2{font-size:26px;margin:0;font-weight:700;letter-spacing:.5px}
.section-head h2::before{counter-increment:sec;content:counter(sec,decimal-leading-zero);font-family:var(--mono);font-size:14px;font-weight:600;color:var(--accent-bright);letter-spacing:1px;margin-right:12px}
.section-head .more{font-size:14px;white-space:nowrap;font-weight:500}
.section-intro{color:var(--muted);margin:0 0 26px;font-size:15px;max-width:740px;line-height:1.8}

/* ---------- cards ---------- */
.grid{display:grid;gap:18px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:11px;transition:border-color .18s,box-shadow .18s,transform .18s}
.card:hover{border-color:#9fd6bd;box-shadow:var(--shadow-card);transform:translateY(-2px)}
.card h3{margin:0;font-size:17.5px;line-height:1.55;letter-spacing:.3px}
.card h3 a{color:var(--text)}
.card h3 a:hover{color:var(--accent)}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.75}
.card .meta{margin-top:auto;font-size:12.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.3px}
.card .meta a{font-family:var(--font);font-size:13.5px}
.badge{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;border:1px solid var(--border);color:var(--muted);background:var(--surface);letter-spacing:.5px}
.badge.accent{background:var(--accent-soft);border-color:#cfeede;color:var(--accent)}
.badge.type{background:#f0faf5;border-color:#c5e8d5;color:#0a7a58}
.usecases{font-size:13.5px;color:var(--muted)}
.usecases b{color:var(--text);font-weight:600}

/* ---------- tags ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-block;font-size:12.5px;color:var(--accent);background:var(--accent-soft);border:1px solid transparent;border-radius:999px;padding:3px 12px;transition:background .15s,color .15s}
a.tag:hover{background:#d5efe2;color:var(--accent-deep);text-decoration:none}
.tag.dim{background:#eef2f0;color:var(--muted)}

/* ---------- status chip ---------- */
.status{font-family:var(--mono);font-size:11.5px;font-weight:600;border-radius:999px;padding:3px 10px;letter-spacing:.5px}
.status.done{background:#e6f7ed;color:#0b7a46;border:1px solid #c2e8d2}
.status.doing{background:#fdf6e7;color:#a2650d;border:1px solid #f0dfba}

/* ---------- post list ---------- */
.post-list{display:flex;flex-direction:column}
.post-list .post-item{display:block;position:relative;padding:21px 12px;border-bottom:1px solid var(--border);border-radius:10px;transition:background .15s}
.post-list .post-item:hover{background:linear-gradient(90deg,var(--accent-soft),transparent 70%)}
.post-list .post-item a{text-decoration:none}
.post-item .row1{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.post-list .post-item h3{margin:6px 0 8px;font-size:19px;color:var(--text);line-height:1.5;letter-spacing:.3px}
.post-list .post-item h3 a{color:var(--text)}
.post-list .post-item h3 a::after{content:"";position:absolute;inset:0;border-radius:10px}
.post-list .post-item:hover h3 a{color:var(--accent)}
.post-list .post-item p{margin:0 0 10px;color:var(--muted);font-size:14.5px;line-height:1.8}
.post-item .meta{font-size:12.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.3px}
.post-item .tag-row{position:relative;z-index:1}

/* ---------- daily news: cover & list thumbnails ---------- */
.post-cover{margin:8px 0 30px}
.post-cover img{width:100%;display:block;border-radius:14px;border:1px solid var(--border);box-shadow:var(--shadow-card)}
.post-list .post-item.has-thumb{display:flex;gap:20px;align-items:flex-start}
.post-item-main{flex:1;min-width:0}
.post-thumb{width:150px;height:96px;object-fit:cover;border-radius:10px;border:1px solid var(--border);flex:none;margin-top:28px}
.prose .lede{font-size:17.5px;color:#2f4a3f;line-height:1.95}
.source-list{font-size:14.5px}
.source-list li{word-break:break-all}

/* ---------- page head ---------- */
.page-head{padding:56px 0 12px}
.page-head h1{font-size:clamp(27px,3.6vw,34px);margin:8px 0 14px;font-weight:800;line-height:1.4;letter-spacing:.5px}
.page-head .lead{color:var(--muted);font-size:16px;max-width:780px;margin:0 0 18px;line-height:1.85}
.breadcrumb{font-size:13px;color:var(--muted);margin:0;font-family:var(--mono);letter-spacing:.3px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}

/* ---------- article prose ---------- */
.prose{max-width:780px;font-size:16.5px}
.prose h2{font-size:24px;margin:46px 0 16px;font-weight:700;letter-spacing:.3px;position:relative;padding-left:15px;line-height:1.45}
.prose h2::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:3px;background:linear-gradient(180deg,#10b981,#047857)}
.prose h3{font-size:19px;margin:32px 0 12px;font-weight:700;line-height:1.5}
.prose p{margin:14px 0}
.prose ul,.prose ol{padding-left:1.5em;margin:14px 0}
.prose li{margin:7px 0}
.prose blockquote{margin:22px 0;padding:14px 20px;border-left:4px solid var(--accent-bright);background:var(--accent-soft);border-radius:0 10px 10px 0;color:#1c5c44}
.prose blockquote p{margin:4px 0}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--code-bg);border:1px solid #d3eade;border-radius:6px;padding:2px 7px;color:#065f46;overflow-wrap:anywhere}
.prose pre{background:#0c1f18;color:#d9efe3;padding:18px 20px;border-radius:12px;overflow-x:auto;line-height:1.7;font-size:13.5px;border:1px solid rgba(16,185,129,.25)}
.prose pre code{background:none;border:none;color:inherit;padding:0;font-size:inherit}
.prose .table-wrap{overflow-x:auto;margin:20px 0;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
.prose table{border-collapse:collapse;width:100%;font-size:14.5px}
.prose th,.prose td{border-bottom:1px solid var(--border);padding:11px 16px;text-align:left}
.prose th{background:#f1f8f5;font-weight:600;color:#33544a;white-space:nowrap}
.prose td{white-space:normal}
.prose tbody tr:hover{background:#f6fbf9}
.prose tr:last-child td{border-bottom:none}
.prose .note{font-size:13.5px;color:var(--muted)}
.prose img{border-radius:10px;border:1px solid var(--border)}
.prose a{text-decoration:underline;text-decoration-color:#a7dcc4;text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--accent)}
.meta-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 20px;font-size:13.5px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 22px;margin:20px 0 12px}

/* ---------- resource info table ---------- */
.info-table{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.info-table table{border-collapse:collapse;width:100%;font-size:14.5px}
.info-table th{width:132px;text-align:left;background:#f1f8f5;color:#33544a;font-weight:600;border-bottom:1px solid var(--border);padding:12px 18px;vertical-align:top;white-space:nowrap}
.info-table td{padding:12px 18px;border-bottom:1px solid var(--border);word-break:break-all}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none}

/* ---------- filter chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 26px}
.chip{border:1px solid var(--border-strong);background:var(--surface);color:var(--muted);border-radius:999px;padding:7px 18px;font-size:14px;cursor:pointer;font-family:inherit;transition:all .15s}
.chip:hover{border-color:var(--accent-bright);color:var(--accent)}
.chip.active{background:linear-gradient(135deg,#10b981,#047857);border-color:transparent;color:#fff;font-weight:600;box-shadow:0 3px 10px rgba(4,120,87,.25)}
.empty-note{color:var(--muted);font-size:14px;padding:24px;border:1px dashed var(--border-strong);border-radius:var(--radius);background:var(--surface)}

/* ---------- category group ---------- */
.cat-group{margin:38px 0}
.cat-group h2{font-size:21px;margin:0 0 6px;letter-spacing:.3px}
.cat-group .cat-desc{color:var(--muted);font-size:14.5px;margin:0 0 14px}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(135deg,#065f46 0%,#047857 45%,#0d9488 100%);border-radius:16px;color:#fff;padding:40px 38px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;box-shadow:0 10px 30px rgba(6,95,70,.22)}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:30px 30px}
.cta-band>div,.cta-band>a{position:relative;z-index:1}
.cta-band h2{margin:0 0 8px;font-size:24px;letter-spacing:.5px}
.cta-band p{margin:0;opacity:.92;font-size:15px;max-width:580px;line-height:1.8}
.cta-band .btn-light{background:#fff;color:#047857;box-shadow:0 4px 14px rgba(3,54,43,.25)}
.cta-band .btn-light:hover{background:#ecfdf5;text-decoration:none;transform:translateY(-1px)}

/* ---------- form ---------- */
.form-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px;max-width:780px;box-shadow:0 4px 18px rgba(6,95,70,.05)}
.field{margin-bottom:20px}
.field label{display:block;font-weight:600;font-size:14.5px;margin-bottom:7px}
.field .req{color:#d4380d}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px}
.field input,.field textarea,.field select{width:100%;border:1px solid var(--border-strong);border-radius:9px;padding:11px 14px;font-size:15px;font-family:inherit;background:#fff;color:var(--text);transition:border-color .15s,box-shadow .15s}
.field textarea{min-height:100px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent-bright);box-shadow:0 0 0 3px var(--accent-ring)}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:#d4380d}
.field .error-msg{display:none;color:#d4380d;font-size:13px;margin-top:5px}
.field.invalid .error-msg{display:block}
.form-status{display:none;margin-top:20px;border-radius:10px;padding:15px 19px;font-size:14.5px;line-height:1.75}
.form-status.show{display:block}
.form-status.ok{background:#e6f7ed;border:1px solid #bfe6cd;color:#0b6b3f}
.form-status.err{background:#fff1f0;border:1px solid #ffccc7;color:#a8071a}
.form-note{font-size:13px;color:var(--muted);margin-top:16px}

/* ---------- footer ---------- */
.site-footer{margin-top:80px;border-top:1px solid var(--border);background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px;padding:44px 0 30px}
.footer-grid h4{margin:0 0 12px;font-size:14px;color:var(--text);letter-spacing:.5px}
.footer-grid p{margin:6px 0 0;color:var(--muted);font-size:14px}
.footer-grid ul{list-style:none;margin:0;padding:0}
.footer-grid li{margin:9px 0}
.footer-grid a{color:var(--muted);font-size:14px}
.footer-grid a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding:18px 0;font-size:13px;color:var(--muted)}

/* ---------- tags index ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px}
.tag-cloud .tag{font-size:14px;padding:8px 18px}
.tag-count{font-size:12px;opacity:.7;margin-left:6px;font-family:var(--mono)}

/* ---------- 404 ---------- */
.notfound{text-align:center;padding:110px 20px}
.notfound h1{font-size:60px;margin:0 0 12px;color:var(--accent-bright);font-family:var(--mono);letter-spacing:4px}
.notfound p{color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:44px 0}
  .hero{padding:74px 0 54px}
}
@media (max-width:760px){
  .hero{padding:60px 0 46px}
  .nav-toggle{display:inline-block}
  .main-nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch;padding:10px 16px 14px;gap:2px;box-shadow:0 12px 26px rgba(6,95,70,.10)}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px;font-size:16px}
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .cta-band{padding:30px 24px}
  .footer-grid{grid-template-columns:1fr}
  .prose{font-size:16px}
  .prose h2{font-size:21px}
  .section-head h2{font-size:22px}
  .post-list .post-item h3{font-size:17.5px}
  .post-thumb{width:100px;height:66px;margin-top:24px}
}