/* 问鼎娱乐官网 - 全站样式表 */

:root {
  --c-bg: #f7f5f0;
  --c-bg-alt: #efece4;
  --c-surface: #ffffff;
  --c-surface-2: #fbfaf7;
  --c-border: #e2ded3;
  --c-text: #23262b;
  --c-text-soft: #565b64;
  --c-text-faint: #7a808a;

  --c-world-blue: #1f3a5f;
  --c-world-blue-deep: #14263f;
  --c-3d-cyan: #0f9aa4;
  --c-3d-cyan-soft: #e3f4f4;
  --c-city-purple: #6a5a94;
  --c-city-purple-soft: #efeaf6;
  --c-agent-orange: #d97b3f;
  --c-agent-orange-soft: #fbebdd;
  --c-graphite: #3a3d42;

  --c-link: #14263f;
  --c-link-hover: #0f9aa4;

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

  --shadow-card: 0 1px 2px rgba(20, 38, 63, 0.06), 0 6px 20px -8px rgba(20, 38, 63, 0.14);
  --max-w: 1160px;

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

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

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-base);
  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-link); text-decoration: none; }
a:hover { color: var(--c-link-hover); text-decoration: underline; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-world-blue-deep);
  margin: 0 0 14px;
}
h1 { font-size: clamp(26px, 4vw, 38px); }
h2 { font-size: clamp(22px, 3vw, 28px); }
h3 { font-size: clamp(18px, 2.4vw, 21px); }
p { margin: 0 0 16px; color: var(--c-text); }
.lead { font-size: 18px; color: var(--c-text-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-3d-cyan);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.eyebrow::before {
  content: "";
  width: 16px; height: 2px;
  background: var(--c-3d-cyan);
  display: inline-block;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--c-world-blue-deep);
}
.brand:hover { color: var(--c-world-blue-deep); text-decoration: none; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-sub { font-weight: 400; font-size: 12px; color: var(--c-text-faint); display: block; margin-top: -2px; }

.nav-links {
  display: flex;
  gap: 2px;
  list-style: none;
  margin: 0; padding: 0;
  flex-wrap: nowrap;
}
.nav-links a {
  display: inline-block;
  padding: 8px 10px;
  border-radius: var(--radius-s);
  color: var(--c-text);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--c-3d-cyan-soft);
  color: var(--c-world-blue-deep);
  text-decoration: none;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-s);
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block;
  width: 20px; height: 2px;
  background: var(--c-world-blue-deep);
  position: relative;
  transition: 0.2s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute; left: 0;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(880px 420px at 82% -10%, rgba(15,154,164,0.14), transparent 60%),
    radial-gradient(700px 360px at 5% 0%, rgba(106,90,148,0.12), transparent 60%),
    linear-gradient(180deg, #fbfaf6 0%, var(--c-bg) 100%);
  border-bottom: 1px solid var(--c-border);
  padding: 56px 0 44px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}
.hero-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 18px 0 6px;
}
.tag {
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  color: var(--c-text-soft);
}
.tag.blue { color: var(--c-world-blue-deep); border-color: #c9d6e6; background: #eef2f7; }
.tag.cyan { color: #0b6b72; border-color: #bfe3e5; background: var(--c-3d-cyan-soft); }
.tag.purple { color: #4d3f78; border-color: #d8cfe9; background: var(--c-city-purple-soft); }
.tag.orange { color: #a15423; border-color: #f0d2b3; background: var(--c-agent-orange-soft); }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-s);
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
}
.btn-primary { background: var(--c-world-blue-deep); color: #fff; }
.btn-primary:hover { background: var(--c-3d-cyan); color: #fff; text-decoration: none; }
.btn-ghost { background: var(--c-surface); border-color: var(--c-border); color: var(--c-world-blue-deep); }
.btn-ghost:hover { border-color: var(--c-3d-cyan); color: var(--c-3d-cyan); text-decoration: none; }

.hero-figure {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-l);
  padding: 18px;
  box-shadow: var(--shadow-card);
}
.hero-figure figcaption {
  font-size: 12.5px;
  color: var(--c-text-faint);
  margin-top: 10px;
  text-align: center;
}

/* ---------- Section shells ---------- */
section { padding: 48px 0; }
.section-alt { background: var(--c-surface-2); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head p { color: var(--c-text-soft); }

/* ---------- Trend list ---------- */
.trend-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.trend-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-m);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
}
.trend-card h4 { font-size: 15.5px; margin-bottom: 8px; color: var(--c-world-blue-deep); }
.trend-card p { font-size: 14.5px; color: var(--c-text-soft); margin-bottom: 0; }
.trend-note { font-size: 13px; color: var(--c-text-faint); margin-top: 16px; }

/* ---------- Architecture figure ---------- */
.figure-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-l);
  padding: 22px;
  box-shadow: var(--shadow-card);
  margin: 20px 0 30px;
}
.figure-block figcaption {
  font-size: 13px; color: var(--c-text-faint); margin-top: 12px; text-align: center;
}
.figure-scroll { overflow-x: auto; }
.figure-scroll svg { min-width: 560px; }

.figure-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.figure-grid .figure-block { margin: 0; }
.figure-grid figcaption { font-weight: 600; color: var(--c-text-soft); }

/* ---------- Long-form articles ---------- */
.article-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-l);
  padding: 30px 32px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-card);
}
.article-block .cat {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--c-agent-orange);
  background: var(--c-agent-orange-soft);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.article-block h3 { font-size: clamp(19px, 2.6vw, 23px); }
.article-block .key-point {
  font-size: 13.5px;
  color: var(--c-3d-cyan);
  font-weight: 700;
  margin-bottom: 14px;
}
.article-block p { color: var(--c-text); }
.article-block p:last-of-type { margin-bottom: 0; }

/* ---------- Observation column ---------- */
.observe-block {
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
  border: 1px dashed #c9d6e6;
  border-radius: var(--radius-l);
  padding: 24px 26px;
  margin-bottom: 18px;
}
.observe-block .cat { color: var(--c-world-blue-deep); background: #eef2f7; }

/* ---------- Cluster / rollup summaries ---------- */
.cluster {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-l);
  background: var(--c-surface);
  padding: 26px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}
.cluster-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 14px;
  margin-bottom: 16px;
}
.cluster-head h3 { margin: 0; }
.cluster-head a.more { font-size: 13.5px; font-weight: 700; white-space: nowrap; }
.cluster-list { display: grid; gap: 18px; }
.cluster-item h4 { font-size: 16px; margin: 0 0 8px; }
.cluster-item h4 a { color: var(--c-world-blue-deep); }
.cluster-item p { font-size: 14.5px; color: var(--c-text-soft); margin-bottom: 0; }

/* ---------- Page article list (secondary pages) ---------- */
.page-article {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-l);
  padding: 30px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
  scroll-margin-top: 90px;
}
.page-article h2 { font-size: clamp(20px, 2.8vw, 25px); }
.page-article .meta-row {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 16px;
}

/* ---------- Concept intro box ---------- */
.concept-box {
  background: var(--c-world-blue-deep);
  color: #eef1f5;
  border-radius: var(--radius-l);
  padding: 28px 30px;
  margin: 24px 0 32px;
}
.concept-box p { color: #dbe2ea; margin-bottom: 0; }
.concept-box .eyebrow { color: var(--c-3d-cyan); }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 10px; }
.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-m);
  background: var(--c-surface);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 16px 46px 16px 18px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--c-world-blue-deep);
  cursor: pointer;
  position: relative;
  font-family: inherit;
}
.faq-q::after {
  content: "+";
  position: absolute;
  right: 18px; top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--c-3d-cyan);
  font-weight: 400;
}
.faq-item.open .faq-q::after { content: "\2212"; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 18px;
}
.faq-item.open .faq-a { max-height: 600px; padding: 0 18px 18px; }
.faq-a p { color: var(--c-text-soft); font-size: 14.5px; margin: 0; }

/* ---------- Tabs (world stack) ---------- */
.tabs-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tab-btn {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-text-soft);
  cursor: pointer;
  font-family: inherit;
}
.tab-btn.active { background: var(--c-world-blue-deep); border-color: var(--c-world-blue-deep); color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Feature grid (app page) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.feature-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-m);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.feature-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-3d-cyan);
  font-weight: 700;
}
.feature-card h4 { font-size: 15.5px; margin: 6px 0 8px; }
.feature-card p { font-size: 13.5px; color: var(--c-text-soft); margin-bottom: 0; }

/* ---------- About / company ---------- */
.about-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}
.info-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.info-table td { padding: 10px 0; border-bottom: 1px solid var(--c-border); vertical-align: top; }
.info-table td:first-child { color: var(--c-text-faint); width: 110px; white-space: nowrap; }

/* ---------- Table wrapper (avoid page-wide horizontal scroll) ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius-m); }
.table-scroll table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 14px; }
.table-scroll th, .table-scroll td { padding: 10px 14px; border-bottom: 1px solid var(--c-border); text-align: left; }
.table-scroll th { background: var(--c-bg-alt); color: var(--c-world-blue-deep); }

/* ---------- Breadcrumb ---------- */
.crumb { font-size: 13px; color: var(--c-text-faint); margin-bottom: 14px; }
.crumb a { color: var(--c-text-faint); }
.crumb a:hover { color: var(--c-3d-cyan); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--c-world-blue-deep);
  color: #c7cfda;
  padding: 44px 0 26px;
  margin-top: 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 26px;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-grid h5 { color: #fff; font-size: 14px; margin-bottom: 12px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { color: #b7c1d0; font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-brand { font-weight: 800; color: #fff; font-size: 18px; margin-bottom: 10px; }
.footer-desc { font-size: 13.5px; color: #a7b2c2; max-width: 320px; }
.footer-bottom {
  padding-top: 20px;
  font-size: 13px;
  color: #93a0b3;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: #93a0b3; }

.back-top {
  position: fixed;
  right: 22px; bottom: 22px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--c-world-blue-deep);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(20,38,63,0.3);
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 90;
  font-size: 18px;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--c-3d-cyan); transform: translateY(-2px); text-decoration: none; color: #fff; }

/* ---------- Utility ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.mt-0 { margin-top: 0; }
.text-center { text-align: center; }
.stat-row { display: flex; gap: 26px; flex-wrap: wrap; margin: 22px 0; }
.stat-item { min-width: 130px; }
.stat-item .num { font-size: 24px; font-weight: 800; color: var(--c-world-blue-deep); display: block; }
.stat-item .label { font-size: 13px; color: var(--c-text-faint); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .figure-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .about-box { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    padding: 10px 16px 16px;
    display: none;
    gap: 2px;
    flex-wrap: wrap;
  }
  .nav-links a { white-space: normal; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .brand-sub { display: none; }
}

@media (max-width: 720px) {
  .trend-grid { grid-template-columns: 1fr; }
  .figure-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .article-block, .page-article, .cluster { padding: 22px 18px; }
  .footer-grid { grid-template-columns: 1fr; }
  section { padding: 34px 0; }
}

@media (max-width: 420px) {
  .container { padding: 0 16px; }
  h1 { font-size: 24px; }
  .btn { width: 100%; text-align: center; }
}