/* ==========================================================================
   逐梦国际官网 style.css
   海外投资AI大模型 / 国家投资环境 / 建厂成本与园区比较 —— 全站样式
   纯本地 CSS3，无远程字体、无框架依赖
   ========================================================================== */

:root{
  /* 品牌色板：暖白 / 国际深蓝 / 数据青 / 石墨灰 / 机会绿 / 风险橙 */
  --c-bg:#f8f6f1;
  --c-bg-alt:#f1eee5;
  --c-surface:#ffffff;
  --c-ink:#1c2530;
  --c-ink-soft:#4b5563;
  --c-ink-faint:#7a8494;
  --c-navy:#0d2c4d;
  --c-navy-strong:#08213c;
  --c-cyan:#0e8fa6;
  --c-cyan-soft:#e3f3f5;
  --c-graphite:#3a3f44;
  --c-green:#1c8a5a;
  --c-green-soft:#e6f4ec;
  --c-orange:#c9701f;
  --c-orange-soft:#fbeee0;
  --c-border:#e3dfd3;
  --c-border-strong:#c9c2ae;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-card:0 2px 14px rgba(13,44,77,0.07);
  --shadow-hover:0 8px 28px rgba(13,44,77,0.13);
  --font-base: "PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  background:var(--c-bg);
  color:var(--c-ink);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-navy);text-decoration:none;}
a:hover{color:var(--c-cyan);}
ul,ol{padding-left:1.3em;}
h1,h2,h3,h4{color:var(--c-navy-strong);line-height:1.35;margin:0 0 .6em;font-weight:700;}
p{margin:0 0 1em;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(248,246,241,0.94);
  backdrop-filter:saturate(160%) blur(6px);
  border-bottom:1px solid var(--c-border);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--c-navy-strong);font-size:19px;}
.brand img{width:36px;height:36px;}
.brand .brand-sub{display:block;font-size:11px;font-weight:400;color:var(--c-ink-faint);letter-spacing:.03em;}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{
  padding:9px 14px;border-radius:999px;font-size:14.5px;color:var(--c-ink-soft);white-space:nowrap;
}
.main-nav a:hover,.main-nav a[aria-current="page"]{
  background:var(--c-navy);color:#fff;
}
.nav-toggle{
  display:none;background:var(--c-navy);color:#fff;border:none;border-radius:8px;
  width:42px;height:38px;font-size:18px;cursor:pointer;
}

/* ---------- Hero ---------- */
.hero{
  padding:56px 0 44px;
  background:
    radial-gradient(1100px 420px at 82% -10%, rgba(14,143,166,0.14), transparent 60%),
    radial-gradient(900px 400px at 5% 0%, rgba(13,44,77,0.10), transparent 55%);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--c-cyan);
  background:var(--c-cyan-soft);padding:6px 14px;border-radius:999px;font-weight:700;letter-spacing:.02em;margin-bottom:16px;
}
.hero h1{font-size:34px;margin-bottom:20px;}
.hero .lede{font-size:16.5px;color:var(--c-ink-soft);max-width:620px;}
.hero-art{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:18px;box-shadow:var(--shadow-card);}

.hero-meta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.pill{
  font-size:12.5px;background:var(--c-surface);border:1px solid var(--c-border);
  padding:6px 12px;border-radius:999px;color:var(--c-ink-soft);
}

/* ---------- Section shells ---------- */
section{padding:52px 0;}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
.section-head{max-width:760px;margin:0 auto 34px;text-align:left;}
.section-head .kicker{
  display:inline-block;font-size:12.5px;font-weight:700;color:var(--c-green);
  background:var(--c-green-soft);padding:4px 12px;border-radius:999px;margin-bottom:12px;letter-spacing:.02em;
}
.section-head h2{font-size:25px;}
.section-head p{color:var(--c-ink-soft);}

/* ---------- Decision chain (SVG stage) ---------- */
.chain-figure{margin:0;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-card);}
.chain-figure figcaption{margin-top:12px;font-size:13.5px;color:var(--c-ink-faint);}

/* ---------- Feature article (首页8篇重点文章) ---------- */
.feature-article{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-lg);
  padding:34px 34px 30px;box-shadow:var(--shadow-card);margin:0 0 40px;
}
.feature-article .art-meta{display:flex;gap:12px;align-items:center;font-size:13px;color:var(--c-ink-faint);margin-bottom:14px;flex-wrap:wrap;}
.feature-article .art-meta .cat{color:var(--c-cyan);font-weight:700;}
.feature-article h3{font-size:22px;line-height:1.45;margin-bottom:16px;}
.feature-article .art-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:30px;align-items:start;}
.feature-article .art-body p{color:var(--c-ink-soft);font-size:15.3px;}
.feature-article .art-figure{background:var(--c-bg-alt);border-radius:var(--radius-md);padding:14px;border:1px solid var(--c-border);}
.feature-article .art-figure figcaption{font-size:12.5px;color:var(--c-ink-faint);margin-top:8px;}
.feature-article .art-link{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-weight:700;font-size:14.5px;}
.callout{
  background:var(--c-cyan-soft);border-left:4px solid var(--c-cyan);border-radius:8px;
  padding:14px 18px;margin:16px 0;font-size:14.5px;color:var(--c-navy-strong);
}
.callout.orange{background:var(--c-orange-soft);border-left-color:var(--c-orange);}
.callout.green{background:var(--c-green-soft);border-left-color:var(--c-green);}

/* ---------- Category summary rows (二级文章回流) ---------- */
.digest-block{margin:0 0 46px;}
.digest-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap;}
.digest-head h3{font-size:20px;margin:0;}
.digest-head .more-link{font-size:13.5px;font-weight:700;white-space:nowrap;}
.digest-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.digest-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-md);
  padding:20px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:8px;
}
.digest-card .date{font-size:12px;color:var(--c-ink-faint);}
.digest-card h4{font-size:15.5px;margin:0;line-height:1.5;}
.digest-card p{font-size:13.6px;color:var(--c-ink-soft);margin:0;flex:1;}
.digest-card .read-more{font-size:13px;font-weight:700;}

/* App digest (larger previews) */
.app-digest-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.app-digest-grid .digest-card p{font-size:14px;}

/* ---------- Tables / matrices ---------- */
.table-scroll{overflow-x:auto;border-radius:var(--radius-md);border:1px solid var(--c-border);background:var(--c-surface);}
table{width:100%;border-collapse:collapse;min-width:640px;font-size:14px;}
table caption{text-align:left;padding:14px 16px 0;font-size:13px;color:var(--c-ink-faint);}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--c-border);vertical-align:top;}
thead th{background:var(--c-bg-alt);color:var(--c-navy-strong);font-weight:700;white-space:nowrap;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:var(--c-cyan-soft);}
.tag{display:inline-block;font-size:12px;padding:2px 9px;border-radius:999px;font-weight:700;}
.tag.risk-high{background:var(--c-orange-soft);color:var(--c-orange);}
.tag.risk-mid{background:#fff5e0;color:#9a7000;}
.tag.risk-low{background:var(--c-green-soft);color:var(--c-green);}
.tag.info{background:var(--c-cyan-soft);color:var(--c-cyan);}

/* ---------- Observation column (投资观察) ---------- */
.observe-card{
  background:var(--c-bg-alt);border:1px dashed var(--c-border-strong);border-radius:var(--radius-lg);
  padding:26px 28px;margin-bottom:20px;
}
.observe-card h3{font-size:18px;}
.observe-card p{color:var(--c-ink-soft);font-size:14.8px;}
.observe-card .art-meta{font-size:12.5px;color:var(--c-ink-faint);margin-bottom:8px;}

/* ---------- Assistant / AI module ---------- */
.assistant-panel{
  background:linear-gradient(135deg,var(--c-navy) 0%,var(--c-navy-strong) 100%);
  color:#eef3f7;border-radius:var(--radius-lg);padding:36px;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;
}
.assistant-panel h2,.assistant-panel h3{color:#fff;}
.assistant-panel p{color:#c9d6e2;}
.qa-list{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-direction:column;gap:10px;}
.qa-list li{
  background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.16);border-radius:10px;
  padding:11px 14px;font-size:14px;color:#dce7f0;
}
.qa-list li::before{content:"问· ";color:#7fd3e0;font-weight:700;}

/* ---------- Tabs (country compare / cost sim etc.) ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px;}
.tab-btn{
  border:1px solid var(--c-border);background:var(--c-surface);color:var(--c-ink-soft);
  padding:8px 16px;border-radius:999px;font-size:13.5px;cursor:pointer;font-family:inherit;
}
.tab-btn[aria-selected="true"]{background:var(--c-navy);color:#fff;border-color:var(--c-navy);}
.tab-panel{display:none;}
.tab-panel.is-active{display:block;}

/* ---------- Scenario simulator ---------- */
.scenario-box{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-card);}
.scenario-controls{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 18px;}
.scenario-controls button{
  border:1px solid var(--c-border-strong);background:var(--c-bg-alt);color:var(--c-navy-strong);
  padding:8px 14px;border-radius:8px;font-size:13.5px;cursor:pointer;font-family:inherit;
}
.scenario-controls button.is-active{background:var(--c-orange);border-color:var(--c-orange);color:#fff;}
.scenario-result{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.scenario-result .stat{background:var(--c-bg-alt);border-radius:10px;padding:14px 16px;}
.scenario-result .stat .k{font-size:12.5px;color:var(--c-ink-faint);}
.scenario-result .stat .v{font-size:22px;font-weight:700;color:var(--c-navy-strong);}
.scenario-note{font-size:12.5px;color:var(--c-ink-faint);margin-top:14px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-border);}
.faq-item{border-bottom:1px solid var(--c-border);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:18px 4px;
  font-size:15.5px;font-weight:700;color:var(--c-navy-strong);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit;
}
.faq-q .icon{flex:none;width:22px;height:22px;transition:transform .2s ease;color:var(--c-cyan);}
.faq-item[data-open="true"] .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:14.3px;color:var(--c-ink-soft);}
.faq-item[data-open="true"] .faq-a{max-height:400px;}
.faq-a p{padding:0 4px 18px;margin:0;}

/* ---------- About / company ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;}
.about-facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px;}
.about-facts .fact{background:var(--c-bg-alt);border-radius:10px;padding:12px 14px;font-size:13.5px;}
.about-facts .fact b{display:block;color:var(--c-navy-strong);font-size:14px;margin-bottom:2px;}

/* ---------- Disclaimer ---------- */
.disclaimer{background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-md);padding:20px 22px;font-size:13px;color:var(--c-ink-faint);}
.disclaimer h4{font-size:14px;color:var(--c-ink-soft);margin-bottom:8px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-navy-strong);color:#b9c6d4;padding:44px 0 22px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:32px;}
.site-footer h5{color:#fff;font-size:14.5px;margin-bottom:14px;}
.site-footer a{color:#b9c6d4;}
.site-footer a:hover{color:#fff;}
.footer-nav{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;font-size:13.6px;}
.footer-brand p{font-size:13.3px;color:#93a4b6;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.12);margin-top:32px;padding-top:18px;
  font-size:12.3px;color:#7e8fa2;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
}

/* ---------- Back to top ---------- */
.back-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  background:var(--c-navy);color:#fff;border:none;cursor:pointer;box-shadow:var(--shadow-hover);
  display:none;align-items:center;justify-content:center;font-size:18px;z-index:90;
}
.back-top.is-visible{display:flex;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:999px;
  font-size:14.5px;font-weight:700;border:1px solid transparent;cursor:pointer;font-family:inherit;
}
.btn-primary{background:var(--c-navy);color:#fff;}
.btn-primary:hover{background:var(--c-navy-strong);color:#fff;}
.btn-outline{background:transparent;border-color:var(--c-border-strong);color:var(--c-navy-strong);}
.btn-outline:hover{border-color:var(--c-navy);color:var(--c-navy);}

/* ---------- Feature grid (App functions / decision layers) ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.feature-tile{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-md);padding:18px;box-shadow:var(--shadow-card);}
.feature-tile .num{font-size:12px;color:var(--c-cyan);font-weight:700;}
.feature-tile h4{font-size:15px;margin:6px 0 6px;}
.feature-tile p{font-size:13.2px;color:var(--c-ink-soft);margin:0;}

/* ---------- Two column generic ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start;}

/* ---------- App download entries ---------- */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.download-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-md);padding:22px;text-align:center;box-shadow:var(--shadow-card);}
.download-card img{width:54px;height:54px;margin:0 auto 12px;}
.download-card h4{font-size:15.5px;margin-bottom:6px;}
.download-card p{font-size:12.8px;color:var(--c-ink-faint);margin:0;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:12.8px;color:var(--c-ink-faint);padding:14px 0 0;}
.breadcrumb a{color:var(--c-ink-faint);}
.breadcrumb a:hover{color:var(--c-cyan);}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;}
  .feature-article .art-grid{grid-template-columns:1fr;}
  .digest-grid{grid-template-columns:repeat(2,1fr);}
  .app-digest-grid{grid-template-columns:1fr;}
  .assistant-panel{grid-template-columns:1fr;}
  .about-grid{grid-template-columns:1fr;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .scenario-result{grid-template-columns:1fr;}
  .download-grid{grid-template-columns:1fr;}
}
@media (max-width:768px){
  .main-nav{
    position:fixed;top:66px;left:0;right:0;background:var(--c-surface);border-bottom:1px solid var(--c-border);
    flex-direction:column;align-items:stretch;padding:10px 16px 16px;gap:2px;
    max-height:0;overflow:hidden;transition:max-height .25s ease;box-shadow:var(--shadow-card);
  }
  .main-nav.is-open{max-height:520px;}
  .main-nav a{padding:12px 10px;border-radius:8px;}
  .nav-toggle{display:block;}
  .hero h1{font-size:26px;}
  .section-head h2{font-size:21px;}
  .feature-article{padding:22px 18px;}
  .digest-grid{grid-template-columns:1fr;}
  .two-col{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:430px){
  .wrap{padding:0 16px;}
  .hero{padding:38px 0 30px;}
  .hero h1{font-size:22px;}
  .feature-tile,.digest-card{padding:14px;}
  .footer-grid{grid-template-columns:1fr;}
  .assistant-panel{padding:22px;}
}