:root{
  --brand:#0f6b46;        /* 深绿，知产/版权稳重感 */
  --brand-dark:#0a4d32;
  --brand-light:#e7f3ec;
  --accent:#c8912a;       /* 证书金 */
  --ink:#1c2521;
  --muted:#5b6a63;
  --line:#e2e8e4;
  --bg:#ffffff;
  --bg-soft:#f6f8f7;
  --radius:12px;
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"Microsoft YaHei","PingFang SC","Segoe UI",system-ui,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--brand-dark)}
.brand .logo{width:38px;height:38px;border-radius:9px;background:#2a2d7a url('logo.png') center/cover no-repeat;color:#fff;font-size:14px;font-weight:700;display:grid;place-items:center;letter-spacing:.5px}
.nav-menu{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.nav-menu a{color:var(--ink);font-size:15px;font-weight:500}
.nav-menu a.active{color:var(--brand);font-weight:700}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:18px;cursor:pointer}
.nav-cta{background:var(--brand);color:#fff!important;padding:9px 16px;border-radius:9px;font-weight:600}
.nav-cta:hover{background:var(--brand-dark);text-decoration:none}

/* Hero */
.hero{background:linear-gradient(180deg,var(--brand-light),#fff);padding:60px 0 48px}
.hero h1{font-size:34px;line-height:1.35;margin:0 0 14px;color:var(--brand-dark)}
.hero .lead{font-size:18px;color:var(--muted);max-width:820px;margin:0 0 26px}
.tags{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 26px;padding:0;list-style:none}
.tags li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;font-weight:600;color:var(--brand-dark)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 26px;border-radius:10px;font-weight:600;font-size:16px}
.btn:hover{background:var(--brand-dark);text-decoration:none}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}

/* Sections */
section.block{padding:52px 0}
section.block.soft{background:var(--bg-soft)}
.section-title{font-size:26px;margin:0 0 8px;color:var(--brand-dark)}
.section-sub{color:var(--muted);margin:0 0 30px;font-size:16px}
h2.blk{font-size:22px;margin:0 0 16px;color:var(--brand-dark);border-left:4px solid var(--brand);padding-left:12px}
h3{font-size:18px;margin:22px 0 10px;color:var(--ink)}

.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-top:0}
.card p{color:var(--muted);margin:0}
.card .num{font-size:13px;color:var(--accent);font-weight:700;letter-spacing:1px}

/* Steps */
.steps{display:flex;flex-wrap:wrap;gap:0;align-items:stretch;counter-reset:s}
.step{flex:1;min-width:150px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;margin:6px;position:relative;text-align:center}
.step b{display:block;color:var(--brand);font-size:15px}
.step span{font-size:13px;color:var(--muted)}
.step .n{width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;margin:0 auto 8px;font-weight:700}

/* Lists / checklist */
.check{list-style:none;padding:0;margin:0}
.check li{padding-left:28px;position:relative;margin:10px 0}
.check li::before{content:"✓";position:absolute;left:0;top:0;color:#fff;background:var(--brand);width:20px;height:20px;border-radius:5px;display:grid;place-items:center;font-size:12px}
.arrow{list-style:none;padding:0;margin:0}
.arrow li{padding-left:22px;position:relative;margin:9px 0;color:var(--muted)}
.arrow li::before{content:"›";position:absolute;left:0;color:var(--brand);font-weight:800}

/* Table */
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px}
th,td{border:1px solid var(--line);padding:11px 13px;text-align:left;vertical-align:top}
th{background:var(--brand-light);color:var(--brand-dark)}
tr:nth-child(even) td{background:var(--bg-soft)}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:10px;margin:12px 0;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 18px;font-weight:600;color:var(--ink);list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:18px;top:14px;color:var(--brand);font-size:20px;font-weight:700}
.faq-item[open] summary::after{content:"–"}
.faq-item .a{padding:0 18px 16px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}

/* Callout */
.callout{background:var(--brand-light);border-left:4px solid var(--brand);border-radius:8px;padding:16px 18px;margin:18px 0;color:var(--brand-dark)}
.answer{background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:16px 20px;margin:0 0 26px;font-size:17px;color:var(--ink)}
.answer b{color:var(--brand-dark)}
.note{font-size:13px;color:var(--muted)}
.risk{background:#fdf6ec;border:1px solid #f0dcae;border-radius:10px;padding:18px}

/* Certificate / license gallery */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:box-shadow .2s}
.cert-card:hover{box-shadow:0 6px 18px rgba(15,107,70,.10)}
.cert-card .imgbox{aspect-ratio:3/4;background:#fff;display:grid;place-items:center;border-bottom:1px solid var(--line);overflow:hidden}
.cert-card .imgbox img{width:100%;height:100%;object-fit:contain;display:block;cursor:zoom-in}
.cert-card .imgbox img:hover{opacity:.92}
.cert-card .ph{color:var(--muted);font-size:14px;text-align:center;padding:14px;line-height:1.6}
.cert-card .ph b{color:var(--brand-dark)}
.cert-card .cap{padding:12px 14px}
.cert-card .cap b{display:block;color:var(--brand-dark);font-size:15px;margin-bottom:2px}
.cert-card .cap span{font-size:13px;color:var(--muted)}
@media(max-width:860px){.cert-grid{grid-template-columns:1fr}}

/* Team */
.team-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.team-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;display:flex;gap:16px}
.team-card .avatar{flex:0 0 56px;width:56px;height:56px;border-radius:50%;background:#2a2d7a;color:#fff;display:grid;place-items:center;font-size:22px;font-weight:700}
.team-card .who{flex:1}
.team-card .who h3{margin:0 0 6px;font-size:18px;color:var(--ink)}
.team-card .role{display:inline-block;background:var(--brand-light);color:var(--brand-dark);font-size:12px;font-weight:700;padding:3px 12px;border-radius:999px;margin-bottom:10px}
.team-card .fields{margin:0;padding:0;font-size:14px;color:var(--muted)}
.team-card .fields li{list-style:none;margin:5px 0}
.team-card .fields b{color:var(--ink)}
@media(max-width:860px){.team-grid{grid-template-columns:1fr}}

/* Page intro banner for subpages */
.page-head{background:var(--brand-dark);color:#fff;padding:40px 0}
.page-head h1{margin:0;font-size:28px}
.page-head p{margin:8px 0 0;color:#cfe3d8}

/* CTA band */
.cta-band{background:var(--brand);color:#fff;text-align:center;padding:44px 20px;border-radius:14px}
.cta-band h2{margin:0 0 10px;font-size:24px;color:#fff}
.cta-band p{margin:0 0 22px;color:#d7ece0}
.cta-band .btn{background:#fff;color:var(--brand)}

/* Footer */
.site-footer{background:#12211b;color:#c6d3cd;margin-top:56px;padding:44px 0 22px;font-size:14px}
.site-footer a{color:#c6d3cd}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 14px}
.footer-info li{list-style:none;margin:7px 0;padding-left:0}
.footer-info{padding:0;margin:0}
.footer-legal{border-top:1px solid #263830;margin-top:26px;padding-top:16px;font-size:13px;color:#8fa39a;text-align:center}

/* Breadcrumb */
.crumbs{font-size:13px;color:var(--muted);padding:14px 0}
.crumbs a{color:var(--muted)}

/* Contact */
.info-line{display:flex;gap:10px;margin:12px 0}
.info-line .k{color:var(--muted);min-width:82px}
.form-row{margin:12px 0}
.form-row label{display:block;font-size:14px;margin-bottom:5px;color:var(--muted)}
.form-row input,.form-row textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;font:inherit}

@media(max-width:860px){
  .nav-menu{position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 20px;border-bottom:1px solid var(--line);display:none}
  .nav-menu.open{display:flex}
  .nav-menu li{padding:10px 0;border-top:1px solid var(--line)}
  .nav-toggle{display:block}
  .grid.c2,.grid.c3,.grid.c4,.footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:26px}
}

/* FAQ hub cards */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cat-card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;color:var(--ink)}
.cat-card:hover{border-color:var(--brand);text-decoration:none;box-shadow:0 6px 16px rgba(15,107,70,.10)}
.cat-card h2{font-size:17px;margin:0 0 8px;color:var(--brand-dark);display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.cat-card h2 span{font-size:12px;color:#fff;background:var(--brand);border-radius:999px;padding:2px 9px;white-space:nowrap}
.cat-card p{font-size:14px;color:var(--muted);margin:0 0 10px}
.cat-card .more{font-size:13px;color:var(--brand)}
.chips{margin:0 0 22px}
.chip{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;margin:0 6px 8px 0;color:var(--muted)}
.chip:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.num{font-size:13px;color:var(--accent);font-weight:700;letter-spacing:1px}
@media(max-width:860px){.cat-grid{grid-template-columns:1fr}}
/* Category summary + question list + pager */
.cat-summary{background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:20px 22px;margin:0 0 24px}
.cat-summary h2{margin-top:0}
.cat-summary p{margin:0;color:var(--ink);font-size:15.5px;line-height:1.9}
.qitem{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin:12px 0}
.qitem .qt{font-size:17px;margin:0 0 6px}
.qitem .qt a{color:var(--brand-dark)}
.qitem .qt a:hover{color:var(--brand)}
.qitem .qex{margin:0 0 6px;color:var(--muted);font-size:14.5px}
.qitem .qlink{font-size:13.5px}
.pager{margin:22px 0 6px;font-size:14px;color:var(--muted)}
.pager a,.pager .cur{display:inline-block;min-width:30px;text-align:center;padding:5px 10px;margin:0 3px;border:1px solid var(--line);border-radius:8px;background:#fff}
.pager .cur{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700}

/* Certificate lightbox */
.lightbox{position:fixed;inset:0;background:rgba(8,18,13,.9);display:none;align-items:center;justify-content:center;z-index:200;padding:26px}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:84vh;object-fit:contain;background:#fff;border-radius:6px;box-shadow:0 12px 44px rgba(0,0,0,.55)}
.lightbox .lb-cap{position:absolute;left:0;right:0;bottom:20px;text-align:center;color:#e6efe9;font-size:14px;padding:0 20px}
.lightbox .lb-close{position:absolute;top:14px;right:20px;color:#fff;font-size:32px;line-height:1;cursor:pointer;background:none;border:0;font-family:inherit}
.lightbox .lb-close:hover{color:#c8912a}
.lightbox .lb-hint{position:absolute;top:22px;left:24px;color:#a9bdb3;font-size:13px}

/* Office gallery */
.office-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.office-grid .wide{grid-column:span 2}
.office-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.office-card .imgbox{aspect-ratio:4/3;background:#fff;overflow:hidden;border-bottom:1px solid var(--line)}
.office-card .imgbox img{width:100%;height:100%;object-fit:cover;display:block;cursor:zoom-in}
.office-card .imgbox img:hover{opacity:.94}
.office-card .cap{padding:11px 14px;font-size:13.5px;color:var(--muted)}
.office-card .cap b{display:block;color:var(--brand-dark);font-size:15px;margin-bottom:2px}
@media(max-width:860px){.office-grid{grid-template-columns:1fr}.office-grid .wide{grid-column:auto}}

/* Stats band (homepage) */
.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{text-align:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 14px}
.stat .stat-num{font-size:30px;font-weight:800;color:var(--brand);line-height:1.15;display:block}
.stat .stat-lb{font-size:14px;color:var(--muted);margin-top:6px;display:block}
@media(max-width:860px){.stats-band{grid-template-columns:repeat(2,1fr)}}

/* Data cards (about) */
.data-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.data-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.data-card .v{font-size:26px;font-weight:800;color:var(--brand);line-height:1.2}
.data-card .k{font-size:15px;font-weight:700;color:var(--brand-dark);margin:4px 0 6px}
.data-card p{font-size:13.5px;color:var(--muted);margin:0}
@media(max-width:860px){.data-grid{grid-template-columns:1fr}}