/* ==========================================================================
   汇赢国际官网 style.css
   国际供应链AI / 供应商风险 / 库存预测 / 全球生产布局
   ========================================================================== */

:root{
  --c-bg:#F7F5F0;
  --c-bg-alt:#F1EEE6;
  --c-surface:#FFFFFF;
  --c-navy:#0B2A4A;
  --c-navy-light:#154276;
  --c-navy-pale:#E7EDF3;
  --c-graphite:#33383D;
  --c-graphite-soft:#666E76;
  --c-line:#E2DED2;
  --c-line-soft:#EDEAE0;
  --c-cyan:#0E8F98;
  --c-cyan-pale:#DFF1F1;
  --c-green:#2C8158;
  --c-green-pale:#E2F1E7;
  --c-orange:#C96A2E;
  --c-orange-pale:#F6E6D8;
  --c-red:#B84A3E;

  --radius-s:6px;
  --radius-m:12px;
  --radius-l:20px;

  --shadow-card:0 1px 2px rgba(11,42,74,0.06), 0 8px 24px -12px rgba(11,42,74,0.18);
  --shadow-pop:0 12px 32px -8px rgba(11,42,74,0.28);

  --container-w:1180px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--c-bg);
  color:var(--c-graphite);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-navy-light);text-decoration:none;}
a:hover{color:var(--c-cyan);}
ul,ol{padding-left:1.3em;}
h1,h2,h3,h4{color:var(--c-navy);line-height:1.35;margin:0 0 .6em;font-weight:700;}
p{margin:0 0 1em;}
table{border-collapse:collapse;width:100%;}
button{font-family:inherit;}

.container{max-width:var(--container-w);margin:0 auto;padding:0 20px;}
.wrap-scroll{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--c-navy);color:#fff;
  padding:10px 16px;border-radius:0 0 8px 0;z-index:200;
}
.skip-link:focus{left:0;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(247,245,240,0.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--c-line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-navy);font-weight:700;font-size:19px;}
.brand img{width:36px;height:36px;}
.brand small{display:block;font-weight:400;font-size:11px;color:var(--c-graphite-soft);letter-spacing:.03em;}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;border:1px solid var(--c-line);background:var(--c-surface);
  border-radius:var(--radius-s);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-navy);margin:0 auto;}

.main-nav{display:flex;align-items:center;}
.main-nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0;}
.main-nav a{
  display:block;padding:10px 14px;border-radius:999px;font-size:14.5px;color:var(--c-navy);font-weight:500;
  white-space:nowrap;
}
.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--c-navy);color:#fff;}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--c-graphite-soft);padding:14px 0 0;}
.breadcrumb a{color:var(--c-graphite-soft);}
.breadcrumb a:hover{color:var(--c-cyan);}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--c-navy) 0%,#0E3A63 55%,#0F4A72 100%);
  color:#EAF1F8;padding:56px 0 64px;position:relative;overflow:hidden;
}
.hero .container{display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.04em;
  background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.22);
  padding:5px 12px;border-radius:999px;margin-bottom:16px;color:#CFE3F2;
}
.hero h1{color:#fff;font-size:clamp(26px,3.6vw,40px);margin-bottom:16px;}
.hero .lead{font-size:16.5px;color:#CFE0EC;max-width:56ch;}
.hero-figure{background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.15);border-radius:var(--radius-l);padding:18px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.hero-tags span{
  font-size:12.5px;padding:5px 11px;border-radius:999px;background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.2);color:#DCEAF3;
}
.hero-cta{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;
  font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--c-cyan);color:#fff;}
.btn-primary:hover{background:#0B7A82;color:#fff;}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,0.4);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,0.12);color:#fff;}
.btn-outline{background:var(--c-surface);border-color:var(--c-line);color:var(--c-navy);}
.btn-outline:hover{border-color:var(--c-cyan);color:var(--c-cyan);}

/* ---------- section scaffolding ---------- */
.section{padding:58px 0;}
.section-alt{background:var(--c-bg-alt);}
.section-head{max-width:760px;margin:0 0 32px;}
.section-kicker{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--c-cyan);
  text-transform:uppercase;margin-bottom:10px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.section-head .lead{color:var(--c-graphite-soft);font-size:15.5px;max-width:64ch;}

/* ---------- grid helpers ---------- */
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

/* ---------- cards ---------- */
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-card);
}
.card h3{font-size:17px;margin-bottom:8px;}
.card p{color:var(--c-graphite-soft);font-size:14.5px;margin-bottom:0;}

.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:28px 0;}
.stat-box{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);padding:18px;text-align:center;}
.stat-box .num{font-size:22px;font-weight:700;color:var(--c-navy);display:block;}
.stat-box .cap{font-size:12.5px;color:var(--c-graphite-soft);}

/* ---------- diagram figure ---------- */
.figure{margin:0;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);padding:16px;}
.figure img{border-radius:var(--radius-s);}
.figure figcaption{font-size:13px;color:var(--c-graphite-soft);margin-top:10px;line-height:1.6;}
.figure-plain{border:0;padding:0;background:none;box-shadow:none;}

/* ---------- flagship article (homepage 8) ---------- */
.article-full{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);
  padding:36px;margin-bottom:26px;box-shadow:var(--shadow-card);
  scroll-margin-top:90px;
}
.article-meta{display:flex;gap:14px;align-items:center;font-size:13px;color:var(--c-graphite-soft);margin-bottom:12px;flex-wrap:wrap;}
.article-meta .tag{
  background:var(--c-navy-pale);color:var(--c-navy);padding:3px 10px;border-radius:999px;font-weight:600;font-size:12px;
}
.article-index{
  display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;
  background:var(--c-cyan);color:#fff;font-weight:700;font-size:13px;margin-right:10px;
}
.article-full h3{font-size:clamp(19px,2.4vw,25px);margin-bottom:16px;line-height:1.5;}
.article-body{display:grid;grid-template-columns:1.35fr 1fr;gap:28px;align-items:start;}
.article-body .figure{position:sticky;top:88px;}
.article-text p{font-size:15.2px;color:#3B4046;margin-bottom:1em;}
.article-text .lede{font-size:16px;color:var(--c-graphite);}
.article-text strong{color:var(--c-navy);}
.article-callout{
  border-left:3px solid var(--c-cyan);background:var(--c-cyan-pale);padding:12px 16px;border-radius:0 var(--radius-s) var(--radius-s) 0;
  font-size:14px;color:#0C4B50;margin:16px 0;
}
.article-links{margin-top:14px;font-size:13.5px;display:flex;gap:16px;flex-wrap:wrap;}

/* ---------- observation cards (3 汇赢国际官网供应链观察) ---------- */
.observation{
  background:var(--c-navy-pale);border:1px solid #D3E0EC;border-radius:var(--radius-m);
  padding:24px;margin-bottom:18px;
}
.observation .article-meta{color:#3F5A76;}
.observation h3{font-size:17.5px;}
.observation p{font-size:14.5px;color:#2B4258;}

/* ---------- secondary article rollup cards ---------- */
.rollup-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:20px;display:flex;flex-direction:column;gap:8px;height:100%;
}
.rollup-card .article-meta{margin-bottom:2px;}
.rollup-card h4{font-size:15.5px;margin:0 0 4px;color:var(--c-navy);line-height:1.5;}
.rollup-card p{font-size:13.8px;color:var(--c-graphite-soft);flex-grow:1;}
.rollup-card .more{font-size:13px;font-weight:600;}
.rollup-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.rollup-head h2{margin:0;font-size:20px;}
.rollup-head a{font-size:13.5px;font-weight:600;}

/* ---------- secondary page article (full, 1300-1900 / 1000-1500) ---------- */
.doc-article{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);
  padding:32px;margin-bottom:24px;scroll-margin-top:90px;
}
.doc-article h2{font-size:clamp(19px,2.3vw,24px);}
.doc-article .figure{margin:18px 0;}
.doc-article p{font-size:15.2px;color:#3B4046;}

/* ---------- tabs (generic: tier / price / inventory / risk / twin / factory / ai demo) ---------- */
.tabs{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);padding:22px;box-shadow:var(--shadow-card);}
.tab-buttons{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px;}
.tab-buttons button{
  padding:9px 16px;border-radius:999px;border:1px solid var(--c-line);background:var(--c-bg-alt);
  color:var(--c-graphite);font-size:13.8px;font-weight:600;cursor:pointer;
}
.tab-buttons button[aria-selected="true"]{background:var(--c-navy);border-color:var(--c-navy);color:#fff;}
.tab-panel{display:none;}
.tab-panel[data-active="true"]{display:block;}
.tab-panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:center;}
.tab-note{font-size:13.5px;color:var(--c-graphite-soft);background:var(--c-bg-alt);border-radius:var(--radius-s);padding:12px 14px;margin-top:14px;}

/* ---------- timeline (time-to-impact / recovery / app assistant) ---------- */
.timeline{display:flex;gap:0;margin:18px 0;}
.timeline-step{flex:1;position:relative;padding:0 14px 0 0;}
.timeline-step::before{
  content:"";position:absolute;top:14px;left:0;right:-14px;height:2px;background:var(--c-line);
}
.timeline-step:last-child::before{display:none;}
.timeline-dot{
  width:28px;height:28px;border-radius:50%;background:var(--c-cyan);color:#fff;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-bottom:10px;position:relative;z-index:2;
}
.timeline-step h4{font-size:13.5px;margin:0 0 4px;color:var(--c-navy);}
.timeline-step p{font-size:12.8px;color:var(--c-graphite-soft);margin:0;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line);}
.faq-list details{border-bottom:1px solid var(--c-line);padding:16px 2px;}
.faq-list summary{
  cursor:pointer;font-weight:600;color:var(--c-navy);font-size:15px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{content:"+";font-size:20px;color:var(--c-cyan);font-weight:400;flex-shrink:0;}
.faq-list details[open] summary::after{content:"−";}
.faq-list .faq-a{font-size:14.3px;color:var(--c-graphite-soft);margin-top:10px;padding-right:26px;}
.faq-cols{columns:2;column-gap:40px;}
.faq-cols details{break-inside:avoid;}

/* ---------- table ---------- */
.data-table{font-size:14px;background:var(--c-surface);border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--c-line);min-width:560px;}
.data-table th,.data-table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--c-line-soft);}
.data-table th{background:var(--c-navy-pale);color:var(--c-navy);font-size:12.8px;text-transform:uppercase;letter-spacing:.03em;}
.data-table tr:last-child td{border-bottom:0;}
.data-table td.num{font-variant-numeric:tabular-nums;color:var(--c-graphite);}
.tag-risk{color:var(--c-orange);font-weight:600;}
.tag-ok{color:var(--c-green);font-weight:600;}

/* ---------- chat / assistant demo ---------- */
.chat-demo{background:var(--c-navy);border-radius:var(--radius-l);padding:22px;color:#EAF1F8;}
.chat-q-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.chat-q-list button{
  background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.22);color:#DCEAF3;
  padding:8px 14px;border-radius:999px;font-size:13px;cursor:pointer;text-align:left;
}
.chat-q-list button[aria-selected="true"]{background:var(--c-cyan);border-color:var(--c-cyan);color:#fff;}
.chat-window{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.15);border-radius:var(--radius-m);padding:18px;}
.chat-bubble-q{color:#CFE3F2;font-size:14px;font-weight:600;margin-bottom:10px;}
.chat-bubble-a{font-size:14.3px;color:#EAF1F8;}
.chat-trace{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-wrap:wrap;gap:6px;font-size:12px;}
.chat-trace li{background:rgba(255,255,255,0.08);border-radius:6px;padding:4px 9px;color:#BFD6E5;}
.chat-trace li::after{content:"→";margin-left:6px;color:#5FA8B4;}
.chat-trace li:last-child::after{content:"";}

/* ---------- app mock frame ---------- */
.phone-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.phone{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);padding:14px;text-align:center;box-shadow:var(--shadow-card);}
.phone img{border-radius:10px;border:1px solid var(--c-line-soft);}
.phone .cap{font-size:13.5px;font-weight:600;color:var(--c-navy);margin-top:10px;}
.phone .sub{font-size:12.3px;color:var(--c-graphite-soft);}

.download-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0;}
.download-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:22px;text-align:center;
}
.download-card img{margin:0 auto 12px;width:56px;height:56px;}
.download-card h4{color:var(--c-navy);margin-bottom:6px;font-size:15.5px;}
.download-card p{font-size:13px;color:var(--c-graphite-soft);margin-bottom:14px;}
.download-card .btn{width:100%;justify-content:center;}
.notice-box{
  background:var(--c-orange-pale);border:1px solid #E7C8A6;color:#7A3F16;border-radius:var(--radius-m);
  padding:16px 18px;font-size:13.8px;margin:20px 0;
}
.notice-box strong{display:block;margin-bottom:4px;color:#5F2E0C;}

/* ---------- disclaimer / sample-data badge ---------- */
.sample-badge{
  display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;color:var(--c-orange);
  background:var(--c-orange-pale);padding:3px 10px;border-radius:999px;letter-spacing:.02em;
}

/* ---------- company section ---------- */
.company{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);
  padding:34px;display:grid;grid-template-columns:1.3fr 1fr;gap:30px;
}
.company dl{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:14px;margin:0;}
.company dt{color:var(--c-graphite-soft);}
.company dd{margin:0;color:var(--c-navy);font-weight:600;}

/* ---------- internal link list ---------- */
.link-fan{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.link-fan a{
  font-size:13.5px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:999px;
  padding:8px 14px;color:var(--c-navy);font-weight:500;
}
.link-fan a:hover{border-color:var(--c-cyan);color:var(--c-cyan);}

/* ---------- footer ---------- */
.site-footer{background:var(--c-navy);color:#B9CBDA;padding:48px 0 22px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px;}
.footer-grid h5{color:#fff;font-size:14px;margin-bottom:12px;}
.footer-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;}
.footer-grid a{color:#B9CBDA;font-size:13.5px;}
.footer-grid a:hover{color:#fff;}
.footer-brand p{font-size:13px;color:#93A9BC;max-width:38ch;}
.footer-disclaimer{border-top:1px solid rgba(255,255,255,0.12);padding-top:18px;font-size:12px;color:#7F97AB;line-height:1.8;}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12px;color:#7F97AB;margin-top:14px;}

/* ---------- back to top ---------- */
.back-to-top{
  position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;
  background:var(--c-navy);color:#fff;border:none;cursor:pointer;display:none;
  align-items:center;justify-content:center;font-size:18px;box-shadow:var(--shadow-pop);z-index:90;
}
.back-to-top.show{display:flex;}

/* ---------- misc ---------- */
.section-title-sm{font-size:12.5px;font-weight:700;color:var(--c-cyan);letter-spacing:.05em;text-transform:uppercase;}
.divider{height:1px;background:var(--c-line);margin:44px 0;}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start;}
.center{text-align:center;}
.mt-0{margin-top:0;}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .phone-row{grid-template-columns:repeat(2,1fr);}
}

@media (max-width:900px){
  .main-nav{
    position:fixed;inset:68px 0 0 0;background:var(--c-bg);
    transform:translateX(100%);transition:transform .25s ease;
    padding:20px;overflow-y:auto;border-top:1px solid var(--c-line);
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;gap:4px;}
  .main-nav a{padding:14px 16px;font-size:16px;}
  .nav-toggle{display:flex;}

  .hero .container{grid-template-columns:1fr;}
  .hero-figure{order:-1;}

  .article-body{grid-template-columns:1fr;}
  .article-body .figure{position:static;}

  .company{grid-template-columns:1fr;}
  .two-col{grid-template-columns:1fr;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .tab-panel-grid{grid-template-columns:1fr;}
  .faq-cols{columns:1;}
}

@media (max-width:640px){
  .section{padding:40px 0;}
  .article-full,.doc-article,.company,.tabs{padding:22px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .phone-row{grid-template-columns:1fr 1fr;}
  .download-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:22px;}
  .footer-bottom{flex-direction:column;}
  .timeline{flex-direction:column;gap:16px;}
  .timeline-step::before{display:none;}
  .rollup-head{flex-direction:column;align-items:flex-start;gap:6px;}
}

@media (max-width:400px){
  .header-inner{height:60px;}
  .brand{font-size:16px;}
  .brand img{width:30px;height:30px;}
  .hero{padding:40px 0 48px;}
  .phone-row{grid-template-columns:1fr;}
}