/* 欧博官网 oubo-ai.com.cn — Enterprise Agent Operations Center visual system */

:root{
  --bg:#f4f6fa;
  --bg-soft:#eaeef5;
  --surface:#ffffff;
  --surface-2:#f0f3f8;
  --ink:#0b1a2b;
  --ink-soft:#3d4c61;
  --ink-faint:#6b7a90;
  --border:#dde3ee;
  --border-soft:#e8ecf3;
  --primary:#0b3a53;
  --primary-2:#0e6e86;
  --accent:#0f9488;
  --accent-soft:#e4f4f1;
  --amber:#95620a;
  --amber-soft:#fbf1de;
  --danger:#a3271f;
  --danger-soft:#fbeae8;
  --ok:#1b7a4d;
  --ok-soft:#e7f5ee;
  --dark:#081521;
  --dark-2:#0e2436;
  --dark-ink:#e8edf5;
  --dark-border:#1c3346;
  --radius:10px;
  --radius-lg:16px;
  --shadow:0 1px 2px rgba(11,26,43,.05), 0 8px 24px -12px rgba(11,26,43,.12);
  --shadow-lg:0 4px 10px rgba(11,26,43,.06), 0 24px 48px -20px rgba(11,26,43,.22);
  --maxw:1220px;
  --maxw-article:820px;
  --font: "PingFang SC","Microsoft YaHei","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  --font-mono: "SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --c-sales:#2d5fc4;
  --c-sales-soft:#e8eefb;
  --c-service:#0f8f82;
  --c-service-soft:#e3f4f1;
  --c-procurement:#7457bf;
  --c-procurement-soft:#efeafa;
  --c-inventory:#a3690f;
  --c-inventory-soft:#f9f0e0;
  --c-finance:#1c7a52;
  --c-finance-soft:#e5f4ec;
  --c-quality:#bd4c17;
  --c-quality-soft:#fbebe0;
  --c-logistics:#2461a0;
  --c-logistics-soft:#e6f0f9;
  --c-hr:#9c3b82;
  --c-hr-soft:#f7e9f2;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--primary-2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;color:var(--ink);font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.4em}
button{font-family:inherit}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.container--article{max-width:var(--maxw-article)}
.container--wide{max-width:1320px}

/* ---------- Skip link ---------- */
.skip-link{position:absolute;left:-999px;top:auto;background:var(--primary);color:#fff;padding:10px 16px;border-radius:8px;z-index:999}
.skip-link:focus{left:16px;top:16px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink);white-space:nowrap}
.brand:hover{text-decoration:none}
.brand__mark{width:34px;height:34px;flex:none}
.brand__sub{font-size:12px;font-weight:500;color:var(--ink-faint);display:block;margin-top:1px}
.nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav a{
  padding:9px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-soft);font-weight:600;white-space:nowrap;
}
.nav a:hover{background:var(--surface-2);text-decoration:none;color:var(--primary)}
.nav a.is-active{background:var(--primary);color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:8px;padding:8px 10px;color:var(--ink)}

@media (max-width:1080px){
  .nav{
    position:fixed;inset:68px 0 0 0;background:var(--surface);
    flex-direction:column;align-items:stretch;gap:0;padding:10px 16px;
    overflow-y:auto;transform:translateY(-8px);opacity:0;pointer-events:none;transition:.18s ease;
    border-top:1px solid var(--border);
  }
  .nav.is-open{opacity:1;pointer-events:auto;transform:translateY(0)}
  .nav a{padding:14px 10px;border-bottom:1px solid var(--border-soft);border-radius:0}
  .nav-toggle{display:inline-flex;align-items:center;gap:6px}
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(180deg,var(--dark) 0%,var(--dark-2) 100%);
  color:var(--dark-ink);
  padding:64px 0 72px;
  position:relative;
  overflow:hidden;
}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero__kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
  color:#8fd9cf;background:rgba(15,148,136,.16);
  border:1px solid rgba(15,148,136,.35);
  padding:6px 12px;border-radius:999px;margin-bottom:18px;
}
.hero h1{font-size:clamp(26px,3.6vw,40px);color:#fff;margin-bottom:18px;letter-spacing:-.01em}
.hero p.lead{color:#c3d0e0;font-size:16.5px;line-height:1.85;max-width:56ch}
.hero__actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.hero__visual{filter:drop-shadow(0 20px 50px rgba(0,0,0,.35))}
@media (max-width:920px){
  .hero .container{grid-template-columns:1fr;gap:32px}
  .hero__visual{order:-1}
}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:9px;font-weight:700;font-size:14.5px;
  border:1px solid transparent;cursor:pointer;transition:.15s ease;
}
.btn:hover{text-decoration:none}
.btn--primary{background:var(--accent);color:#04241f}
.btn--primary:hover{background:#0dab9d}
.btn--ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.28)}
.btn--ghost:hover{background:rgba(255,255,255,.14)}
.btn--outline{background:transparent;color:var(--primary);border-color:var(--border)}
.btn--outline:hover{background:var(--surface-2)}

/* ---------- Sections ---------- */
.section{padding:64px 0}
.section--alt{background:var(--surface)}
.section--tight{padding:44px 0}
.section__head{max-width:760px;margin-bottom:36px}
.section__kicker{
  display:block;font-size:12.5px;font-weight:800;letter-spacing:.06em;color:var(--accent);
  text-transform:uppercase;margin-bottom:10px;
}
.section__title{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.section__desc{color:var(--ink-soft);font-size:15.5px}
.section__foot{margin-top:30px}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13.5px;color:var(--ink-faint);padding:16px 0 0}
.breadcrumb a{color:var(--ink-faint)}
.breadcrumb a:hover{color:var(--primary)}

/* ---------- Cards: core articles ---------- */
.core-articles{display:grid;grid-template-columns:1fr;gap:20px}
.core-article{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:26px 28px;box-shadow:var(--shadow);
}
.core-article__meta{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.core-article__index{
  width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:13.5px;flex:none;
}
.core-article h3{font-size:19px;margin:0 0 12px;line-height:1.5}
.core-article__abstract{color:var(--ink-soft);font-size:15px}
.core-article__link{font-weight:700;font-size:14px}

/* ---------- Tags / badges ---------- */
.tag{
  display:inline-flex;align-items:center;font-size:12px;font-weight:700;
  padding:4px 10px;border-radius:999px;background:var(--surface-2);color:var(--ink-soft);
  border:1px solid var(--border);white-space:nowrap;
}
.tag--accent{background:var(--accent-soft);color:#0a5c53;border-color:#c9e9e4}
.tag--amber{background:var(--amber-soft);color:var(--amber);border-color:#efdcb3}
.time{font-size:12.5px;color:var(--ink-faint)}

/* ---------- Observation list ---------- */
.observe-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.observe-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}
.observe-card h3{font-size:16.5px;margin-bottom:10px}
.observe-card p{color:var(--ink-soft);font-size:14.5px;margin-bottom:0}
@media (max-width:920px){.observe-grid{grid-template-columns:1fr}}

/* ---------- Rollup lists (secondary page teasers) ---------- */
.rollup-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.rollup-tabs button{
  padding:9px 16px;border-radius:999px;border:1px solid var(--border);background:var(--surface);
  color:var(--ink-soft);font-weight:700;font-size:13.5px;cursor:pointer;
}
.rollup-tabs button.is-active{background:var(--primary);border-color:var(--primary);color:#fff}
.rollup-panel{display:none}
.rollup-panel.is-active{display:block}
.rollup-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rollup-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.rollup-card h4{font-size:15px;margin:0 0 8px;line-height:1.5}
.rollup-card p{font-size:13.8px;color:var(--ink-soft);margin-bottom:10px}
.rollup-card a{font-size:13px;font-weight:700}
.rollup-panel__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:10px}
.rollup-panel__head a{font-weight:700;font-size:13.5px}
@media (max-width:920px){.rollup-list{grid-template-columns:1fr}}

/* ---------- Agent role grid ---------- */
.agent-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.agent-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:20px;border-top:3px solid var(--role-color,var(--primary));
}
.agent-card__head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.agent-card__icon{width:30px;height:30px;flex:none}
.agent-card__role{font-weight:800;font-size:15.5px}
.agent-card h4{margin:0;font-size:15.5px}
.agent-card__block{margin-top:10px}
.agent-card__label{font-size:11.5px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:4px}
.agent-card__text{font-size:13.6px;color:var(--ink-soft)}
.agent-card--sales{--role-color:var(--c-sales)} .agent-card--service{--role-color:var(--c-service)}
.agent-card--procurement{--role-color:var(--c-procurement)} .agent-card--inventory{--role-color:var(--c-inventory)}
.agent-card--finance{--role-color:var(--c-finance)} .agent-card--quality{--role-color:var(--c-quality)}
.agent-card--logistics{--role-color:var(--c-logistics)} .agent-card--hr{--role-color:var(--c-hr)}
@media (max-width:1080px){.agent-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.agent-grid{grid-template-columns:1fr}}

/* ---------- Diagram frame ---------- */
.diagram-frame{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow);overflow-x:auto;
}
.diagram-frame svg{display:block;margin:0 auto;min-width:560px}
.diagram-caption{margin-top:14px;font-size:13.5px;color:var(--ink-faint);text-align:center}
.diagram-wide svg{min-width:760px}

/* ---------- Evidence / demo callouts ---------- */
.evidence-box{
  background:var(--surface-2);border:1px solid var(--border);border-left:3px solid var(--primary-2);
  border-radius:8px;padding:14px 16px;font-size:13.6px;font-family:var(--font-mono);color:var(--ink-soft);
  margin:14px 0;line-height:1.9;overflow-x:auto;white-space:pre-wrap;
}
.evidence-box--issue{border-left-color:var(--danger)}
.evidence-box--ok{border-left-color:var(--ok)}
.demo-flag{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--amber);
  background:var(--amber-soft);border:1px solid #efdcb3;border-radius:999px;padding:4px 10px;margin-bottom:14px;
}

/* ---------- Approval flow ---------- */
.approval-flow{display:flex;flex-wrap:wrap;gap:0;align-items:stretch;margin:18px 0}
.approval-step{
  background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:14px 16px;
  flex:1 1 150px;min-width:140px;position:relative;font-size:13.6px;
}
.approval-step__label{font-size:11px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:4px}
.approval-step--human{background:var(--amber-soft);border-color:#efdcb3}
.approval-step--human .approval-step__label{color:var(--amber)}
.approval-flow .arrow{display:flex;align-items:center;justify-content:center;width:26px;color:var(--ink-faint);flex:none}
@media (max-width:760px){.approval-flow{flex-direction:column}.approval-flow .arrow{width:auto;height:22px}}

/* ---------- Trend grid ---------- */
.trend-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trend-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.trend-card__num{font-size:12px;font-weight:800;color:var(--accent);margin-bottom:8px;letter-spacing:.04em}
.trend-card h4{font-size:14.5px;margin:0 0 8px}
.trend-card p{font-size:13.3px;color:var(--ink-soft);margin:0}
@media (max-width:1080px){.trend-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.trend-grid{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:18px 4px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;
  font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq-q__mark{flex:none;width:22px;height:22px;color:var(--accent);transition:transform .15s ease}
.faq-item.is-open .faq-q__mark{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
.faq-item.is-open .faq-a{max-height:600px}
.faq-a p{padding:0 4px 18px;color:var(--ink-soft);font-size:14.5px;margin:0}

/* ---------- Company / footer ---------- */
.company-block{
  background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;
}
.company-block h2{font-size:20px}
.company-block p{color:var(--ink-soft);font-size:15px}

.legal-note{font-size:12.8px;color:var(--ink-faint);background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:14px 16px;margin:20px 0}

.site-footer{background:var(--dark);color:#9db0c4;padding:44px 0 28px;margin-top:20px}
.site-footer a{color:#c7d4e3}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:28px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:18px;margin-bottom:10px}
.footer-brand svg{width:26px;height:26px}
.footer-col h5{color:#fff;font-size:13px;letter-spacing:.03em;text-transform:uppercase;margin-bottom:12px}
.footer-col a{display:block;font-size:13.6px;padding:5px 0;color:#aebdd0}
.footer-col a:hover{color:#fff;text-decoration:none}
.footer-bottom{border-top:1px solid var(--dark-border);padding-top:20px;font-size:12.6px;color:#7c8ca0;display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between}
@media (max-width:920px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}

/* ---------- Article page (secondary full article) ---------- */
.article-page{padding:36px 0 70px}
.article-header{margin-bottom:28px}
.article-header h1{font-size:clamp(22px,3vw,29px);margin-bottom:14px}
.article-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:6px}
.article-body{font-size:16px;color:#1a2635}
.article-body p{margin:0 0 1.3em}
.article-core-judgment{
  background:var(--accent-soft);border:1px solid #c9e9e4;border-radius:10px;padding:18px 20px;margin:26px 0;
  font-size:15px;color:#0a4a43;font-weight:600;
}
.article-core-judgment b{display:block;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin-bottom:6px;font-weight:800}
.article-nav{display:flex;justify-content:space-between;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);gap:16px;flex-wrap:wrap}
.article-related{margin-top:56px;padding-top:32px;border-top:1px solid var(--border)}
.article-related h3{font-size:17px;margin-bottom:16px}

/* ---------- Generic table (registry / matrix demo) ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface)}
table.demo-table{width:100%;border-collapse:collapse;min-width:640px;font-size:13.6px}
table.demo-table th{
  text-align:left;background:var(--surface-2);color:var(--ink-soft);font-size:12px;letter-spacing:.03em;
  text-transform:uppercase;padding:12px 14px;border-bottom:1px solid var(--border);white-space:nowrap;
}
table.demo-table td{padding:12px 14px;border-bottom:1px solid var(--border-soft);color:var(--ink)}
table.demo-table tr:last-child td{border-bottom:none}

/* ---------- Two-col intent list ---------- */
.intent-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 28px}
.intent-grid a{
  display:block;padding:10px 14px;background:var(--surface);border:1px solid var(--border);border-radius:8px;
  font-size:14px;color:var(--ink-soft);
}
.intent-grid a:hover{border-color:var(--primary-2);color:var(--primary-2);text-decoration:none}
@media (max-width:760px){.intent-grid{grid-template-columns:1fr}}

/* ---------- App feature grid ---------- */
.app-feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.app-feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-align:center}
.app-feature__icon{width:34px;height:34px;margin:0 auto 10px}
.app-feature h4{font-size:14px;margin:0}
@media (max-width:920px){.app-feature-grid{grid-template-columns:repeat(2,1fr)}}

.download-panel{
  display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px 28px;
}
.download-panel__note{font-size:13.6px;color:var(--ink-faint);max-width:60ch}

/* ---------- Workflow step demo (clickable) ---------- */
.workflow-steps{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.workflow-step{
  flex:1 1 150px;text-align:left;cursor:pointer;background:var(--surface);
  border:1px solid var(--border);border-radius:10px;padding:12px 14px;
  font-size:12.8px;font-weight:700;color:var(--ink-soft);font-family:inherit;
}
.workflow-step:hover{border-color:var(--primary-2)}
.workflow-step.is-active{border-color:var(--accent);background:var(--accent-soft);color:#0a5c53}
.workflow-detail{
  margin-top:16px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;
  padding:16px 18px;font-size:14px;color:var(--ink-soft);min-height:24px;
}

/* ---------- Utility ---------- */
.mt-0{margin-top:0}.text-center{text-align:center}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.section__title-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (max-width:760px){
  .section{padding:44px 0}
  .core-article{padding:20px}
}