/* ==========================================================================
   聚鑫汇官网 style.css
   股票投资AI研究平台 · 设计系统
   色彩：暖白 / 金融深蓝 / 研究青 / 现金流绿 / 估值金 / 石墨灰
   ========================================================================== */

:root {
  --color-bg: #FAF7F2;
  --color-bg-alt: #F1ECE1;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F6F2EA;
  --color-ink: #232A32;
  --color-ink-soft: #5B6672;
  --color-ink-faint: #879099;
  --color-navy: #10233F;
  --color-navy-light: #1C3B63;
  --color-navy-soft: #E7ECF3;
  --color-teal: #146B6A;
  --color-teal-soft: #E2F0EE;
  --color-green: #2E7D5B;
  --color-green-soft: #E5F1EA;
  --color-gold: #A8763A;
  --color-gold-soft: #F4E9D8;
  --color-red-muted: #A14343;
  --color-border: #E4DECF;
  --color-border-strong: #CFC6B2;
  --shadow-card: 0 1px 2px rgba(16, 35, 63, 0.06), 0 8px 24px rgba(16, 35, 63, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(16, 35, 63, 0.08), 0 16px 32px rgba(16, 35, 63, 0.10);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  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(--color-teal); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.3em; }
h1, h2, h3, h4 { color: var(--color-navy); line-height: 1.35; margin: 0 0 0.6em; font-weight: 700; }
p { margin: 0 0 1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(250, 247, 242, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 34px; height: 34px; }
.brand-name { font-size: 20px; font-weight: 800; color: var(--color-navy); letter-spacing: 0.5px; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: 1px solid var(--color-border-strong);
  border-radius: 8px; cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--color-navy); margin: 0 auto; }

.nav-list {
  display: flex; gap: 6px; list-style: none; margin: 0; padding: 0;
}
.nav-link {
  display: inline-block; padding: 9px 14px; border-radius: 999px;
  color: var(--color-navy); font-weight: 600; font-size: 14.5px;
}
.nav-link:hover { background: var(--color-navy-soft); text-decoration: none; }
.nav-link.active, .nav-link[aria-current="page"] {
  background: var(--color-navy); color: #fff;
}

/* ---------- Hero ---------- */
.hero {
  padding: 56px 0 44px;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--color-teal-soft); color: var(--color-teal);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 700; margin-bottom: 16px;
}
.hero-title { font-size: 34px; margin-bottom: 16px; }
.hero-title .accent { color: var(--color-teal); }
.hero-lead { color: var(--color-ink-soft); font-size: 16.5px; max-width: 56ch; }
.hero-actions { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.hero-figure { display: flex; align-items: center; justify-content: center; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; font-weight: 700; font-size: 14.5px;
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--color-navy); color: #fff; }
.btn-primary:hover { background: var(--color-navy-light); text-decoration: none; }
.btn-outline { background: transparent; border-color: var(--color-border-strong); color: var(--color-navy); }
.btn-outline:hover { background: var(--color-surface); text-decoration: none; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13.5px; color: var(--color-ink-faint); padding: 14px 0 0;
}
.breadcrumb a { color: var(--color-ink-soft); }
.breadcrumb .sep { margin: 0 6px; }

/* ---------- Section ---------- */
.section { padding: 54px 0; }
.section-alt { background: var(--color-surface-soft); }
.section-head { max-width: 760px; margin: 0 0 32px; }
.section-kicker {
  display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--color-gold); margin-bottom: 10px;
}
.section-title { font-size: 26px; margin-bottom: 10px; }
.section-lead { color: var(--color-ink-soft); font-size: 15.5px; }

/* ---------- Chain / diagram wrapper ---------- */
.diagram-block {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 24px; margin: 22px 0;
  box-shadow: var(--shadow-card);
}
.diagram-caption { font-size: 13.5px; color: var(--color-ink-faint); margin-top: 12px; text-align: center; }

/* ---------- Card grid ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 22px; box-shadow: var(--shadow-card);
  transition: box-shadow .2s ease, transform .2s ease;
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--color-ink-soft); font-size: 14.5px; margin-bottom: 0; }
.card .card-icon { width: 40px; height: 40px; margin-bottom: 14px; }

/* ---------- Tags / badges ---------- */
.tag {
  display: inline-block; font-size: 12px; font-weight: 700;
  padding: 3px 10px; border-radius: 999px; background: var(--color-navy-soft); color: var(--color-navy);
  margin: 0 6px 6px 0;
}
.tag.teal { background: var(--color-teal-soft); color: var(--color-teal); }
.tag.green { background: var(--color-green-soft); color: var(--color-green); }
.tag.gold { background: var(--color-gold-soft); color: var(--color-gold); }
.badge-note {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 700; color: var(--color-red-muted);
  background: #F6EAE6; border: 1px solid #E9CFC7; padding: 4px 10px; border-radius: 8px;
}

/* ---------- Article blocks (flagship long-form) ---------- */
.article-list { display: flex; flex-direction: column; gap: 28px; }
.article-block {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-card);
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  font-size: 13px; color: var(--color-ink-faint); margin-bottom: 12px;
}
.article-index {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--color-navy); color: #fff; font-size: 13px; font-weight: 800;
}
.article-title { font-size: 21px; margin-bottom: 14px; }
.article-summary { color: var(--color-ink); }
.article-summary p { margin-bottom: 1em; }
.article-diagram { margin: 18px 0; }
.article-full-toggle {
  margin-top: 16px; border-top: 1px dashed var(--color-border-strong); padding-top: 16px;
}
.article-full-toggle summary {
  cursor: pointer; font-weight: 700; color: var(--color-teal); list-style: none; font-size: 14.5px;
  display: inline-flex; align-items: center; gap: 6px;
}
.article-full-toggle summary::-webkit-details-marker { display: none; }
.article-full-toggle summary::after { content: "展开阅读全文 ▾"; }
.article-full-toggle[open] summary::after { content: "收起全文 ▴"; }
.article-full-body { padding-top: 14px; color: var(--color-ink); }
.article-full-body p { margin-bottom: 1em; }
.article-full-body h4 { font-size: 15.5px; color: var(--color-navy); margin: 1.2em 0 0.5em; }

/* ---------- Callouts ---------- */
.callout {
  border-left: 4px solid var(--color-teal); background: var(--color-teal-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 14px 18px; margin: 16px 0; font-size: 14.5px;
}
.callout strong { color: var(--color-navy); }
.callout.warning { border-color: var(--color-gold); background: var(--color-gold-soft); }
.callout.risk { border-color: var(--color-red-muted); background: #F6EAE6; }

/* ---------- Observation section (官网股票观察) ---------- */
.observation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.observation-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 22px; box-shadow: var(--shadow-card);
}
.observation-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.observation-card p { font-size: 14.5px; color: var(--color-ink-soft); }

/* ---------- Sub-article summary cards (二级页面回流) ---------- */
.digest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.digest-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 20px;
}
.digest-card .digest-source { font-size: 12.5px; color: var(--color-ink-faint); margin-bottom: 6px; }
.digest-card h4 { font-size: 15.5px; margin-bottom: 8px; }
.digest-card p { font-size: 14px; color: var(--color-ink-soft); margin-bottom: 10px; }
.digest-card a { font-size: 13.5px; font-weight: 700; }

/* ---------- Stat grid ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 18px; text-align: center;
}
.stat-item .stat-value { font-size: 22px; font-weight: 800; color: var(--color-navy); }
.stat-item .stat-label { font-size: 12.5px; color: var(--color-ink-faint); margin-top: 4px; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); margin: 18px 0; }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14px; background: var(--color-surface); }
table caption { text-align: left; font-size: 13px; color: var(--color-ink-faint); padding: 10px 14px; }
th, td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); text-align: left; white-space: nowrap; }
thead th { background: var(--color-navy-soft); color: var(--color-navy); font-weight: 700; }
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; }

/* ---------- Tabs (financial statement switch / DCF / cross-market / factor map) ---------- */
.tabs { margin: 18px 0; }
.tab-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.tab-btn {
  padding: 9px 16px; border-radius: 999px; border: 1px solid var(--color-border-strong);
  background: var(--color-surface); color: var(--color-navy); font-weight: 700; font-size: 13.5px; cursor: pointer;
}
.tab-btn[aria-selected="true"] { background: var(--color-navy); color: #fff; border-color: var(--color-navy); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 4px 18px;
}
.faq-item summary {
  cursor: pointer; padding: 14px 0; font-weight: 700; color: var(--color-navy); list-style: none;
  display: flex; justify-content: space-between; gap: 12px; align-items: center; font-size: 15px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--color-ink-faint); flex-shrink: 0; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding-bottom: 14px; color: var(--color-ink-soft); font-size: 14.5px; margin: 0; }

/* ---------- Assistant demo (聚鑫汇助手) ---------- */
.assistant-demo {
  background: var(--color-navy); color: #EDF1F7; border-radius: var(--radius-lg); padding: 26px;
}
.assistant-questions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.assistant-q-btn {
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.18); color: #EDF1F7;
  padding: 9px 14px; border-radius: 999px; font-size: 13.5px; cursor: pointer;
}
.assistant-q-btn[aria-selected="true"] { background: var(--color-teal); border-color: var(--color-teal); }
.assistant-answer {
  background: rgba(255,255,255,0.06); border-radius: var(--radius-md); padding: 18px; display: none;
}
.assistant-answer.active { display: block; }
.assistant-answer p { color: #DCE3ED; font-size: 14.5px; }
.assistant-evidence { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.evidence-tag {
  font-size: 12px; padding: 4px 10px; border-radius: 999px; background: rgba(255,255,255,0.1); color: #C9D3E0;
}

/* ---------- Company / disclaimer ---------- */
.company-block {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 28px;
}
.disclaimer-block {
  background: var(--color-surface-soft); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 24px; font-size: 14px; color: var(--color-ink-soft);
}
.disclaimer-block h3 { font-size: 16px; margin-bottom: 8px; }
.disclaimer-block + .disclaimer-block { margin-top: 14px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-navy); color: #C9D3E0; padding: 46px 0 24px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1.3fr 1.6fr; gap: 32px; }
.footer-brand p { margin: 8px 0 0; font-size: 13.5px; color: #9FADC0; }
.footer-brand .footer-company { color: #E4E9F0; font-weight: 700; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { color: #C9D3E0; font-size: 14px; }
.footer-nav a:hover { color: #fff; }
.footer-legal p { font-size: 12.5px; color: #93A1B6; line-height: 1.8; margin-bottom: 10px; }
.footer-icp .icp-placeholder { color: #6E7C90; }
.footer-copyright { color: #6E7C90; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); margin-top: 26px; padding-top: 18px;
  font-size: 12.5px; color: #6E7C90;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; right: 22px; bottom: 26px; width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-navy); color: #fff; border: none; font-size: 18px; cursor: pointer;
  box-shadow: var(--shadow-card-hover); opacity: 0; pointer-events: none; transition: opacity .2s ease;
  z-index: 50;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; }
.text-center { text-align: center; }
.flow-link { font-weight: 700; }
.icon-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.icon-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--color-ink-soft); }
.icon-list li::before { content: "›"; color: var(--color-teal); font-weight: 800; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .observation-grid { grid-template-columns: 1fr; }
  .digest-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-legal { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-figure { order: -1; max-width: 320px; margin: 0 auto; }
  .hero-title { font-size: 27px; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute; top: 68px; left: 0; right: 0; background: var(--color-bg);
    border-bottom: 1px solid var(--color-border); display: none; padding: 10px 20px 18px;
  }
  .site-nav.open { display: block; }
  .nav-list { flex-direction: column; gap: 2px; }
  .nav-link { display: block; }
  .card-grid, .card-grid.cols-2, .card-grid.cols-4 { grid-template-columns: 1fr; }
  .observation-grid { grid-template-columns: 1fr; }
  .digest-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .article-block { padding: 20px; }
  .section-title { font-size: 22px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero { padding: 40px 0 32px; }
  .hero-title { font-size: 23px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Print / a11y ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { transition: none; }
}