/* ==========================================================================
   尊龙凯时官网 - style.css
   Consumer Signal Observatory + Creative Intelligence Lab + Market Trend Radar
   ========================================================================== */

:root {
  --c-bg: #f4f5f7;
  --c-bg-alt: #eceef2;
  --c-surface: #ffffff;
  --c-surface-2: #f8f9fb;
  --c-ink: #1b2130;
  --c-ink-soft: #414a5c;
  --c-muted: #6b7386;
  --c-line: #e1e4eb;
  --c-line-strong: #cbd0db;

  --c-graphite: #232838;
  --c-graphite-2: #2e3448;
  --c-blue-gray: #3b4360;
  --c-blue: #2f5fd6;
  --c-blue-deep: #24408f;
  --c-indigo: #5b4fd6;
  --c-cyan: #1aa5c9;
  --c-orange: #d9812c;
  --c-orange-bg: #fbeee0;
  --c-red: #c8503a;
  --c-red-bg: #fbe9e5;
  --c-green: #2f8f6d;

  --grad-signal: linear-gradient(135deg, #24408f 0%, #5b4fd6 55%, #1aa5c9 100%);
  --grad-panel: linear-gradient(160deg, #232838 0%, #2e3448 100%);

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

  --shadow-s: 0 1px 2px rgba(27, 33, 48, 0.06), 0 1px 1px rgba(27, 33, 48, 0.04);
  --shadow-m: 0 8px 24px rgba(27, 33, 48, 0.08);
  --shadow-l: 0 16px 40px rgba(27, 33, 48, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --max-w: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--c-blue-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.35; margin: 0 0 0.6em; font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
.container { max-width: var(--max-w); 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;
}
[id] { scroll-margin-top: 88px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--c-graphite); }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-name-en { font-size: 11px; color: var(--c-muted); font-weight: 500; letter-spacing: 0.02em; }
.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: var(--radius-s);
  border: 1px solid var(--c-line-strong); background: var(--c-surface);
  align-items: center; justify-content: center; cursor: pointer;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--c-graphite); position: relative;
}
.nav-toggle::before { margin-bottom: 4px; }
.nav-toggle::after { margin-top: 4px; }
.main-nav .nav-list {
  display: flex; gap: 4px; list-style: none; margin: 0; padding: 0;
}
.main-nav .nav-link {
  display: block; padding: 10px 12px; border-radius: var(--radius-s);
  color: var(--c-ink-soft); font-size: 14.5px; font-weight: 600; white-space: nowrap;
}
.main-nav .nav-link:hover, .main-nav .nav-link[aria-current="page"] {
  background: var(--c-bg-alt); color: var(--c-blue-deep); text-decoration: none;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13px; color: var(--c-muted); padding: 14px 0 0;
}
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-blue-deep); }

/* ---------- Hero ---------- */
.hero { padding: 40px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 15px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--c-blue-deep); font-weight: 700; margin-bottom: 14px; }
.hero-question { font-size: 30px; line-height: 1.4; letter-spacing: -0.01em; color: var(--c-ink); font-weight: 700; margin: 0 0 18px; }
.hero-sub { color: var(--c-ink-soft); font-size: 16px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 4px; }
.tag {
  font-size: 12.5px; padding: 5px 10px; border-radius: 999px; background: var(--c-bg-alt);
  color: var(--c-blue-deep); border: 1px solid var(--c-line-strong); font-weight: 600;
}
.hero-visual {
  background: var(--grad-panel); border-radius: var(--radius-l); padding: 20px;
  box-shadow: var(--shadow-l);
}
.page-hero { padding: 36px 0 40px; border-bottom: 1px solid var(--c-line); }
.page-hero h1 { font-size: 27px; }
.page-hero .hero-sub { max-width: 820px; }

/* ---------- Section shell ---------- */
.section { padding: 52px 0; }
.section-alt { background: var(--c-surface); }
.section-head { max-width: 760px; margin: 0 0 30px; }
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--c-blue-deep); text-transform: uppercase; margin-bottom: 10px;
}
.section-title { font-size: 24px; }
.section-lead { color: var(--c-ink-soft); font-size: 15.5px; }

/* ---------- Figure / SVG panels ---------- */
.svg-figure {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-l);
  padding: 20px; box-shadow: var(--shadow-s); margin: 0 0 20px;
}
.svg-figure figcaption {
  font-size: 13px; color: var(--c-muted); margin-top: 12px; line-height: 1.6;
}
.panel-dark { background: var(--grad-panel); border: none; }
.panel-dark figcaption { color: #b9c0d6; }

/* ---------- Signal type grid ---------- */
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.signal-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 20px; box-shadow: var(--shadow-s);
}
.signal-card .signal-icon { width: 34px; height: 34px; margin-bottom: 12px; }
.signal-card h3 { font-size: 16px; }
.signal-card p { font-size: 14px; color: var(--c-ink-soft); margin-bottom: 0; }

/* ---------- Capability map ---------- */
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.capability-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 22px; box-shadow: var(--shadow-s);
}
.capability-card .cap-badge {
  display: inline-block; font-size: 11.5px; font-weight: 700; padding: 3px 8px; border-radius: 999px;
  background: var(--c-bg-alt); color: var(--c-blue-deep); margin-bottom: 10px;
}
.capability-card h3 { font-size: 16.5px; }
.capability-card p { font-size: 14px; color: var(--c-ink-soft); margin-bottom: 10px; }
.capability-card a.card-link { font-size: 13.5px; font-weight: 600; }

/* ---------- Article blocks (full long-form) ---------- */
.article-list { display: flex; flex-direction: column; gap: 40px; }
.article {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-l);
  padding: 32px clamp(20px, 4vw, 44px); box-shadow: var(--shadow-s);
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px;
  font-size: 13px; color: var(--c-muted);
}
.article-cat {
  font-weight: 700; color: var(--c-blue-deep); background: var(--c-bg-alt);
  padding: 3px 9px; border-radius: 999px; font-size: 12px;
}
.article h2 { font-size: 21px; margin-bottom: 14px; }
.article h3.sub-h { font-size: 16.5px; margin-top: 1.6em; color: var(--c-graphite-2); }
.article-excerpt {
  font-size: 15.5px; color: var(--c-ink-soft); background: var(--c-surface-2);
  border-left: 3px solid var(--c-blue); border-radius: 0 var(--radius-s) var(--radius-s) 0;
  padding: 14px 18px; margin: 0 0 20px;
}
.article-body { font-size: 15.5px; color: var(--c-ink); }
.article-body p { margin-bottom: 1.05em; }
.article-body strong { color: var(--c-graphite-2); }
.mini-figure {
  margin: 20px 0; border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 16px; background: var(--c-surface-2);
}
.mini-figure figcaption { font-size: 12.5px; color: var(--c-muted); margin-top: 10px; }
.further-reading {
  margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--c-line-strong);
}
.further-reading h4 { font-size: 13.5px; color: var(--c-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.further-reading ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.further-reading a { font-size: 14px; font-weight: 600; }

/* ---------- Observation cards (官网观察) ---------- */
.observation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.observation-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 22px; box-shadow: var(--shadow-s);
}
.observation-card .obs-label { font-size: 12px; font-weight: 700; color: var(--c-cyan); text-transform: uppercase; letter-spacing: 0.05em; }
.observation-card h3 { font-size: 16px; margin: 8px 0 10px; }
.observation-card p { font-size: 14px; color: var(--c-ink-soft); }

/* ---------- Trend list (2026) ---------- */
.trend-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.trend-item {
  display: flex; gap: 14px; background: var(--c-surface); border: 1px solid var(--c-line);
  border-radius: var(--radius-m); padding: 18px; box-shadow: var(--shadow-s);
}
.trend-num {
  flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--grad-signal);
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px;
}
.trend-item h3 { font-size: 15px; margin-bottom: 6px; }
.trend-item p { font-size: 13.5px; color: var(--c-ink-soft); margin-bottom: 0; }

/* ---------- Reflow (二级内容回流) ---------- */
.reflow-section { padding: 40px 0; }
.reflow-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.reflow-head .view-all { font-size: 13.5px; font-weight: 700; }
.reflow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.reflow-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 18px; box-shadow: var(--shadow-s); display: flex; flex-direction: column;
}
.reflow-card .article-cat { align-self: flex-start; margin-bottom: 10px; }
.reflow-card h3 { font-size: 15.5px; margin-bottom: 8px; }
.reflow-card p { font-size: 13.5px; color: var(--c-ink-soft); flex: 1; }
.reflow-card .reflow-more { font-size: 13px; font-weight: 700; margin-top: 10px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  overflow: hidden;
}
.faq-question {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 16px 20px; font-size: 15px; font-weight: 700; color: var(--c-graphite);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-family: inherit;
}
.faq-question .q-icon { flex: none; width: 20px; height: 20px; transition: transform 0.2s ease; }
.faq-item[data-open="true"] .q-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height 0.25s ease, padding 0.25s ease;
  font-size: 14.5px; color: var(--c-ink-soft);
}
.faq-item[data-open="true"] .faq-answer { padding: 0 20px 18px; max-height: 600px; }
.faq-answer a { font-weight: 600; }

/* ---------- Disclaimer / demo badge ---------- */
.disclaimer-box {
  background: var(--c-surface-2); border: 1px solid var(--c-line-strong); border-radius: var(--radius-m);
  padding: 16px 20px; font-size: 13.5px; color: var(--c-muted); margin: 22px 0;
}
.disclaimer-box strong { color: var(--c-ink-soft); }
.demo-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700;
  color: var(--c-orange); background: var(--c-orange-bg); padding: 3px 9px; border-radius: 999px;
}
.risk-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700;
  color: var(--c-red); background: var(--c-red-bg); padding: 3px 9px; border-radius: 999px;
}

/* ---------- Company / about ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.about-body { font-size: 15px; color: var(--c-ink-soft); }

/* ---------- App feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 20px; text-align: left; box-shadow: var(--shadow-s);
}
.feature-card .feature-num { font-size: 12px; font-weight: 700; color: var(--c-cyan); }
.feature-card h3 { font-size: 15px; margin: 6px 0 8px; }
.feature-card p { font-size: 13.5px; color: var(--c-ink-soft); margin-bottom: 0; }

.download-panel {
  background: var(--grad-panel); border-radius: var(--radius-l); padding: 30px; color: #fff;
  display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
}
.download-panel h3 { color: #fff; font-size: 19px; }
.download-panel p { color: #c3c9de; font-size: 14px; margin-bottom: 0; max-width: 520px; }
.download-note {
  font-size: 13px; color: #c3c9de; background: rgba(255,255,255,0.08); padding: 10px 16px;
  border-radius: var(--radius-s); border: 1px dashed rgba(255,255,255,0.25);
}

/* ---------- Architecture flow (model.html) ---------- */
.arch-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 0 0 20px; }
.arch-col {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 18px; box-shadow: var(--shadow-s);
}
.arch-col h4 {
  font-size: 12.5px; color: var(--c-blue-deep); text-transform: uppercase; letter-spacing: 0.04em;
  margin-bottom: 14px; text-align: center;
}
.arch-step {
  font-size: 13px; color: var(--c-ink-soft); padding: 9px 10px; background: var(--c-surface-2);
  border-radius: 8px; margin-bottom: 4px; text-align: center; border: 1px solid var(--c-line);
}
.arch-arrow { text-align: center; color: var(--c-muted); font-size: 14px; margin: 0 0 4px; }
.arch-final {
  background: var(--grad-panel); border-radius: var(--radius-m); padding: 18px 20px; color: #fff; text-align: center;
}
.arch-final strong { display: block; font-size: 15px; margin-bottom: 4px; }
.arch-final span { font-size: 12.5px; color: #b9c0d6; }
.responsibility-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 24px 0; }
.responsibility-card {
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m); padding: 20px;
}
.responsibility-card h4 { font-size: 14.5px; margin-bottom: 10px; }
.responsibility-card.llm h4 { color: var(--c-indigo); }
.responsibility-card.spec h4 { color: var(--c-cyan); }
.responsibility-card ul { margin: 0; padding-left: 1.2em; font-size: 13.5px; color: var(--c-ink-soft); }
.responsibility-card li { margin-bottom: 4px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 999px;
  font-weight: 700; font-size: 14.5px; border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--grad-signal); color: #fff; }
.btn-primary:hover { text-decoration: none; opacity: 0.92; }
.btn-ghost { background: rgba(255,255,255,0.06); color: #fff; border-color: rgba(255,255,255,0.35); }
.btn-ghost:hover { text-decoration: none; background: rgba(255,255,255,0.14); }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-graphite); color: #b9c0d6; padding: 44px 0 26px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: 10px; }
.footer-brand svg { width: 26px; height: 26px; }
.site-footer p { font-size: 13.5px; color: #9aa2ba; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 12px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: #b9c0d6; font-size: 13.5px; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12.5px; color: #838ba6; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .trend-list { grid-template-columns: 1fr; }
  .reflow-grid { grid-template-columns: repeat(2, 1fr); }
  .observation-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .arch-columns { grid-template-columns: 1fr; }
  .responsibility-grid { grid-template-columns: 1fr; }
  .main-nav { position: fixed; inset: 64px 0 0 0; background: var(--c-surface); padding: 10px 20px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: all 0.18s ease;
    overflow-y: auto; border-top: 1px solid var(--c-line); }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav .nav-list { flex-direction: column; gap: 2px; }
  .main-nav .nav-link { padding: 14px 10px; font-size: 16px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 26px; }
  .page-hero h1 { font-size: 22px; }
  .section-title { font-size: 20px; }
  .signal-grid { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr; }
  .reflow-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .article { padding: 24px 18px; }
  .download-panel { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 430px) {
  .container { padding: 0 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 22px; }
  .article h2 { font-size: 19px; }
}