/* ============================================================
   Tronreview — TRON Ecosystem Data, News & Research
   Light theme · system fonts · static-crawlable design
   Convention: up = red (#d81e06), down = green (#0a8f4c)
   ============================================================ */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #17191d;
  --ink-soft: #2a2e36;
  --muted: #5b6472;
  --faint: #8a93a1;
  --line: #e4e7ec;
  --line-strong: #d3d8e0;
  --brand: #e60012;
  --brand-dark: #b3000e;
  --brand-soft: #fdecec;
  --blue: #0b6bcb;
  --up: #d81e06;   /* increase — red (CN convention) */
  --down: #0a8f4c; /* decrease — green (CN convention) */
  --gold: #a06700;
  --shadow-sm: 0 1px 2px rgba(23, 25, 29, .05), 0 2px 8px rgba(23, 25, 29, .05);
  --shadow-md: 0 2px 6px rgba(23, 25, 29, .06), 0 10px 28px rgba(23, 25, 29, .08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.section { padding: 44px 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff;
  padding: 10px 16px; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------------- header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px; background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff; font-weight: 800; font-size: 19px; display: grid; place-items: center;
  box-shadow: 0 2px 6px rgba(230, 0, 18, .35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 17px; letter-spacing: -.2px; }
.brand-text small { font-size: 10.5px; color: var(--muted); letter-spacing: .4px; text-transform: uppercase; }
.site-nav { display: flex; gap: 4px; margin-left: auto; }
.nav-link {
  color: var(--ink-soft); font-size: 14px; font-weight: 500; padding: 8px 11px;
  border-radius: 8px; white-space: nowrap;
}
.nav-link:hover { background: var(--bg); text-decoration: none; }
.nav-link.is-active { color: var(--brand); background: var(--brand-soft); }
.btn {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: 14px;
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 4px 14px rgba(230, 0, 18, .3); }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-cta { background: linear-gradient(135deg, var(--brand), var(--brand-dark)); color: #fff; box-shadow: 0 4px 14px rgba(230, 0, 18, .3); }
.btn-cta:hover { background: var(--brand-dark); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 8px; font-size: 18px; padding: 6px 10px; cursor: pointer; }

/* ---------------- hero ---------------- */
.hero {
  background:
    radial-gradient(900px 300px at 85% -40px, rgba(230, 0, 18, .10), transparent 60%),
    radial-gradient(700px 260px at 8% 110%, rgba(11, 107, 203, .08), transparent 60%),
    var(--surface);
  border-bottom: 1px solid var(--line);
}
.hero .container { padding: 68px 24px 56px; }
.hero-kicker {
  color: var(--brand); font-weight: 700; font-size: 13px; letter-spacing: .8px;
  text-transform: uppercase; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.12; letter-spacing: -1.2px; max-width: 760px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero-sub { font-size: 18px; color: var(--muted); max-width: 640px; margin: 18px 0 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 30px; color: var(--muted); font-size: 13.5px; }

/* ---------------- sections ---------------- */
.section-title { font-size: 24px; letter-spacing: -.4px; margin-bottom: 6px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.section-sub { font-size: 14px; color: var(--faint); font-weight: 500; }

/* ---------------- metric strip ---------------- */
.metric-strip {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px; margin: 20px 0 10px;
}
.metric {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 4px;
}
.metric-label { font-size: 12.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.metric-value { font-size: 24px; font-weight: 800; letter-spacing: -.5px; font-variant-numeric: tabular-nums; }
.metric-change { font-size: 13px; font-weight: 700; }
.metric-note { font-size: 13px; color: var(--faint); margin-top: 8px; }

.chg.up, .metric-change.up, .impact-high { color: var(--up); }
.chg.down, .metric-change.down { color: var(--down); }
.metric-change.up::before, .chg.up::before { content: "▲ "; }
.metric-change.down::before, .chg.down::before { content: "▼ "; }

/* ---------------- cards ---------------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px; margin-top: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); transition: box-shadow .15s ease, transform .15s ease; height: 100%;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-link { display: flex; flex-direction: column; gap: 10px; padding: 20px 20px 16px; height: 100%; color: var(--ink); }
.card-link:hover { text-decoration: none; }
.card-link h3 { font-size: 17px; line-height: 1.4; letter-spacing: -.2px; }
.card-link p { font-size: 14px; color: var(--muted); }
.card-meta { font-size: 12.5px; color: var(--faint); margin-top: auto; padding-top: 6px; border-top: 1px dashed var(--line); }

.tag {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .3px;
  padding: 3px 9px; border-radius: 999px; text-transform: uppercase;
}
.tag-cat { background: var(--brand-soft); color: var(--brand); }
.tag-link { background: var(--bg); color: var(--muted); border: 1px solid var(--line); margin: 0 6px 6px 0; }
.tag-link:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }

/* ---------------- columns / trust ---------------- */
.col-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin-top: 18px; }
.col-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); color: var(--ink); display: flex; flex-direction: column; gap: 8px;
}
.col-card:hover { text-decoration: none; border-color: var(--brand); box-shadow: var(--shadow-md); }
.col-card h3 { font-size: 17px; }
.col-card p { font-size: 14px; color: var(--muted); }
.col-freq { font-size: 12.5px; color: var(--brand); font-weight: 700; margin-top: auto; }

.trust-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-top: 18px; }
.trust-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.trust-card h3 { font-size: 16px; margin-bottom: 8px; }
.trust-card p { font-size: 14px; color: var(--muted); }

/* ---------------- CTA ---------------- */
.cta-box {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  background: linear-gradient(120deg, var(--brand-soft), #fff 55%);
  border: 1px solid #f5c6c9; border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--shadow-sm);
}
.cta-box h3 { font-size: 19px; margin-bottom: 6px; }
.cta-box p { font-size: 14px; color: var(--muted); max-width: 560px; }

/* ---------------- article layout ---------------- */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 30px; padding: 34px 24px 60px; max-width: 1120px; margin: 0 auto; }
.article { min-width: 0; }
.breadcrumbs { margin-bottom: 18px; font-size: 13px; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; color: var(--faint); }
.breadcrumbs a { color: var(--muted); }
.crumb-sep { color: var(--line-strong); }

.issue-header { margin-bottom: 22px; }
.issue-header h1 { font-size: clamp(26px, 3.6vw, 38px); line-height: 1.2; letter-spacing: -.8px; margin: 12px 0 10px; }
.issue-meta { display: flex; gap: 8px; flex-wrap: wrap; font-size: 13.5px; color: var(--muted); margin-bottom: 12px; }
.issue-tags { display: flex; flex-wrap: wrap; }

.lead { font-size: 18px; color: var(--ink-soft); margin: 6px 0 18px; }
.data-note { font-size: 13px; color: var(--faint); background: var(--bg); border-left: 3px solid var(--line-strong); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; }

.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 18px; margin-bottom: 22px; }
.toc h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--faint); margin-bottom: 8px; }
.toc ol { list-style: none; counter-reset: toc; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.toc li { font-size: 14px; }
.toc a { color: var(--ink-soft); }
.toc a:hover { color: var(--brand); }

.article-section { margin: 30px 0; }
.article-section h2 { font-size: 23px; letter-spacing: -.4px; margin: 26px 0 12px; }
.article-section h3 { font-size: 17px; margin: 20px 0 8px; }
.article-section p { margin: 10px 0; color: var(--ink-soft); }
.box-tinted { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.box-tinted h2 { margin-top: 0; }

/* news items */
.news-item {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; margin: 16px 0; box-shadow: var(--shadow-sm);
}
.news-item-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.news-rank { font-weight: 800; color: var(--faint); font-size: 13px; font-family: var(--mono); }
.news-date { font-size: 12.5px; color: var(--faint); }
.impact { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .4px; padding: 2px 8px; border-radius: 999px; }
.impact-high { background: #fdeaea; color: var(--up); }
.impact-medium { background: #fdf3e3; color: #9a6700; }
.impact-low { background: var(--bg); color: var(--muted); }
.news-item h2 { font-size: 18px; line-height: 1.4; margin: 8px 0; }
.news-summary, .news-comment { font-size: 14.5px; margin: 8px 0; }
.news-comment { background: #fbfbfc; border-left: 3px solid var(--brand); padding: 10px 14px; border-radius: 0 8px 8px 0; }
.news-source { font-size: 12.5px; color: var(--faint); margin-top: 10px; }

/* charts */
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 16px 0; }
.chart-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 16px 10px; }
.chart-card h3 { font-size: 14.5px; margin-bottom: 8px; }
.trend-chart { width: 100%; height: auto; }
.chart-tick { font-size: 10px; fill: var(--faint); font-family: var(--mono); }
.chart-label { font-size: 10.5px; fill: var(--muted); }
.chart-grid-line { stroke: var(--line); stroke-width: 1; }

/* tables */
.table-scroll { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
.data-table th {
  text-align: left; background: #f1f3f6; color: var(--ink-soft); font-size: 12.5px;
  text-transform: uppercase; letter-spacing: .4px; padding: 10px 14px; border-bottom: 1px solid var(--line-strong);
}
.data-table td, .data-table tbody th {
  padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top;
}
.data-table tbody tr:nth-child(even) { background: #fafbfc; }
.data-table tbody tr:hover { background: #f4f6f9; }
.data-table .score { font-weight: 800; font-variant-numeric: tabular-nums; }
.cell-sub { font-size: 12px; color: var(--faint); }
.table-foot { background: var(--bg) !important; font-size: 12.5px; color: var(--faint); }

/* ---------------- deep dive report ---------------- */
.report-topic {
  display: inline-flex; flex-wrap: wrap; gap: 8px; align-items: center;
  background: var(--bg); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; font-size: 13.5px; color: var(--ink-soft); margin: 4px 0 18px;
}
.report-topic span {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px;
  color: var(--brand); border: 1px solid #f3c0c3; background: var(--brand-soft);
  border-radius: 999px; padding: 2px 9px;
}
.exec-summary {
  background: linear-gradient(135deg, #fdf6f6, var(--surface) 60%);
  border: 1px solid #f3c0c3; border-left: 4px solid var(--brand);
  border-radius: var(--radius); padding: 22px 24px; margin: 22px 0;
}
.exec-summary h2 { font-size: 20px; margin-bottom: 14px; letter-spacing: -.3px; }
.exec-point { display: flex; gap: 12px; margin: 12px 0; }
.exec-num {
  flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--brand); color: #fff; font-size: 13px; font-weight: 800; margin-top: 2px;
}
.exec-point p { font-size: 14.5px; color: var(--ink-soft); }
.report-section { margin: 30px 0; }
.report-section h2 { font-size: 22px; letter-spacing: -.4px; margin: 24px 0 12px; }
.report-section p { margin: 10px 0; color: var(--ink-soft); }
.report-table { margin: 16px 0; }
.report-table figcaption { font-size: 13px; font-weight: 700; color: var(--ink-soft); margin-bottom: 8px; }
.side-note { font-size: 13.5px; color: var(--muted); }
.card-grid-wide .card { max-width: 720px; }

/* sources / author / formula */
.source-list { margin: 26px 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.source-list h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--faint); margin-bottom: 10px; }
.source-list ul { list-style: none; }
.source-list li { font-size: 13.5px; padding: 5px 0; border-bottom: 1px dashed var(--line); }
.source-list li:last-child { border-bottom: none; }
.src-name { font-weight: 600; }
.src-kind { font-size: 11px; color: var(--faint); border: 1px solid var(--line); border-radius: 999px; padding: 1px 7px; }

.author-box { display: flex; gap: 14px; align-items: flex-start; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 22px 0; }
.author-avatar {
  width: 44px; height: 44px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--ink), #3a3f4a); color: #fff; font-weight: 800; font-size: 14px;
}
.author-box p { font-size: 13.5px; color: var(--muted); margin-top: 4px; }

.formula-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin: 18px 0; }
.formula-box h4 { font-size: 15px; margin-bottom: 10px; }
.formula-box p { font-size: 13px; color: var(--muted); margin-top: 10px; }

.legend { font-size: 13px; color: var(--muted); margin: 10px 0; }
.faq-item { margin: 14px 0; }
.faq-item h3 { font-size: 16px; }
.faq-item p { font-size: 14.5px; color: var(--muted); }

/* sidebar */
.sidebar { display: flex; flex-direction: column; gap: 16px; }
.side-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.side-box h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--faint); margin-bottom: 10px; }
.side-links { list-style: none; }
.side-links li { padding: 6px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.side-links li:last-child { border-bottom: none; }
.side-ad p { font-size: 13.5px; margin: 6px 0; }

/* page head (listing/static) */
.page-head { background: var(--surface); border-bottom: 1px solid var(--line); }
.page-head .container { padding: 40px 24px 30px; }
.page-head h1 { font-size: clamp(26px, 3.6vw, 38px); letter-spacing: -.8px; margin: 12px 0 8px; }
.page-desc { font-size: 16.5px; color: var(--muted); max-width: 720px; }
.cadence-line { font-size: 13.5px; color: var(--faint); margin-top: 12px; }
.empty-note { background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 28px; color: var(--muted); text-align: center; }

/* prose (static pages) */
.prose { max-width: 780px; }
.prose h2 { font-size: 21px; margin: 28px 0 10px; letter-spacing: -.3px; }
.prose p { margin: 10px 0; color: var(--ink-soft); }
.prose ul { margin: 12px 0 12px 22px; }
.prose li { margin: 6px 0; color: var(--ink-soft); }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--bg); padding: 2px 6px; border-radius: 5px; }
.src-list li { margin: 8px 0; }

/* footer */
.site-footer { background: #eef0f3; border-top: 1px solid var(--line); margin-top: 40px; }
.site-footer .container { padding: 44px 24px 26px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; }
.foot-brand p { font-size: 13.5px; color: var(--muted); margin-top: 12px; max-width: 340px; }
.foot-partner { font-size: 13px !important; }
.foot-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--ink-soft); margin-bottom: 12px; }
.foot-col ul { list-style: none; }
.foot-col li { margin: 7px 0; font-size: 14px; }
.foot-col a, .foot-meta a { color: var(--muted); }
.foot-col a:hover, .foot-meta a:hover { color: var(--brand); }
.foot-meta { border-top: 1px solid var(--line-strong); margin-top: 30px; padding-top: 18px; font-size: 13px; color: var(--muted); }
.foot-meta p { margin: 4px 0; }
.nofollow-tag { font-size: 11px; color: var(--faint); font-style: italic; }

/* responsive */
@media (max-width: 960px) {
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .site-nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: 12px 16px; box-shadow: var(--shadow-md);
  }
  .site-nav.open { display: flex; }
  .nav-link { padding: 12px 10px; }
  .header-inner .btn-cta { display: none; }
  .nav-toggle { display: block; }
  .chart-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .foot-grid { grid-template-columns: 1fr; }
  .metric-strip { grid-template-columns: 1fr 1fr; }
  .brand-text small { display: none; }
}