/* Kaggle CN project chrome · approved Swiss-grid direction. */
:root {
  --kcg-ink: #06141b;
  --kcg-cyan: #20beff;
  --kcg-cyan-dark: #008fc4;
  --kcg-mist: #eff5f7;
  --kcg-white: #ffffff;
  --kcg-slate: #56656e;
  --kcg-line: #cfdaDE;
  --kcg-display: "ZCOOL QingKe HuangYou", "Noto Sans SC", sans-serif;
  --kcg-heading: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --kcg-body: "Noto Sans SC", sans-serif;
  --kcg-utility: "Chakra Petch", ui-monospace, monospace;
  --wp--preset--color--primary: var(--kcg-ink);
  --wp--preset--color--accent: var(--kcg-cyan);
}

html { scroll-padding-top: 90px; }
body.kcg-site { color: var(--kcg-ink); font-family: var(--kcg-body); background: var(--kcg-white); }
body.kcg-site h1,
body.kcg-site h2,
body.kcg-site .wp-block-post-title { font-family: var(--kcg-heading); font-weight: 800; letter-spacing: -.035em; }
body.kcg-site a:focus-visible,
body.kcg-site button:focus-visible { outline: 3px solid var(--kcg-cyan); outline-offset: 3px; }

/* Header */
.kcg-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--kcg-line);
  backdrop-filter: blur(14px);
}
.kcg-header-inner {
  width: min(1280px, calc(100% - 40px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.kcg-brand { display: inline-flex; align-items: center; gap: 11px; color: var(--kcg-ink); text-decoration: none; flex: 0 0 auto; }
.kcg-brand-mark { width: 36px; height: 36px; display: inline-grid; place-items: center; background: var(--kcg-ink); color: var(--kcg-white); font: 400 25px/1 var(--kcg-display); }
.kcg-brand-copy { display: flex; flex-direction: column; gap: 2px; }
.kcg-brand-copy strong { font-size: 17px; line-height: 1.15; font-weight: 900; letter-spacing: -.02em; }
.kcg-brand-copy small { color: var(--kcg-slate); font-size: 9px; line-height: 1; letter-spacing: .08em; }
.kcg-desktop-nav { margin-left: auto; display: flex; align-items: center; gap: 3px; }
.kcg-nav-link { position: relative; min-height: 44px; padding: 0 9px; display: inline-flex; align-items: center; color: #30414a; text-decoration: none; font-size: 13px; font-weight: 700; white-space: nowrap; }
.kcg-nav-link::after { content: ""; position: absolute; left: 9px; right: 9px; bottom: 6px; height: 2px; background: var(--kcg-cyan); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.kcg-nav-link:hover,
.kcg-nav-link.is-current { color: var(--kcg-ink); }
.kcg-nav-link:hover::after,
.kcg-nav-link.is-current::after { transform: scaleX(1); }
.kcg-header-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.kcg-tutoring-link { min-height: 44px; padding: 0 16px; display: inline-flex; align-items: center; justify-content: center; background: var(--kcg-ink); color: var(--kcg-white); text-decoration: none; font-size: 13px; font-weight: 900; transition: background .2s ease, color .2s ease; }
.kcg-tutoring-link:hover { background: var(--kcg-cyan); color: var(--kcg-ink); }
.kcg-menu-toggle { width: 44px; height: 44px; display: none; align-items: center; justify-content: center; border: 1px solid var(--kcg-line); background: var(--kcg-white); color: var(--kcg-ink); cursor: pointer; }
.kcg-header-spacer { height: 76px; }

/* Mobile drawer: the layer is what theme.js toggles; backdrop and panel live inside it. */
.kcg-mobile-layer[hidden] { display: none !important; }
.kcg-mobile-layer { position: fixed; inset: 0; z-index: 1100; display: grid; grid-template-columns: 1fr min(390px, 88vw); }
.kcg-mobile-overlay { grid-column: 1; width: 100%; border: 0; padding: 0; background: rgba(6,20,27,.68); cursor: pointer; }
.kcg-mobile-drawer { grid-column: 2; height: 100dvh; padding: 24px; overflow-y: auto; background: var(--kcg-ink); color: var(--kcg-white); box-sizing: border-box; box-shadow: -24px 0 70px rgba(0,0,0,.24); }
.kcg-drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 22px; border-bottom: 1px solid #28414c; font: 700 12px/1 var(--kcg-utility); letter-spacing: .13em; text-transform: uppercase; }
.kcg-drawer-head button { width: 44px; height: 44px; border: 1px solid #3e5964; background: transparent; color: var(--kcg-white); font-size: 28px; cursor: pointer; }
.kcg-drawer-links { display: flex; flex-direction: column; padding: 18px 0; }
.kcg-mobile-nav-link { min-height: 52px; display: flex; align-items: center; border-bottom: 1px solid #203842; color: #dce8ed; text-decoration: none; font-size: 16px; font-weight: 700; }
.kcg-mobile-nav-link.is-current { color: var(--kcg-cyan); }
.kcg-drawer-cta { min-height: 50px; display: flex; align-items: center; justify-content: center; background: var(--kcg-cyan); color: var(--kcg-ink); text-decoration: none; font-weight: 900; }

/* Footer */
.kcg-footer { padding: 62px 20px 24px; background: var(--kcg-ink); color: var(--kcg-white); }
.kcg-footer-grid { width: min(1280px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.25fr .95fr .7fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
.kcg-footer-title { display: flex; align-items: center; gap: 12px; font-size: 18px; }
.kcg-footer-brand p,
.kcg-footer-contact p { max-width: 440px; margin: 17px 0; color: #a8bbc4; font-size: 13px; line-height: 1.85; }
.kcg-source-link { color: var(--kcg-cyan); text-decoration: none; font-size: 12px; font-weight: 800; }
.kcg-footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 26px; }
.kcg-footer h4 { margin: 0 0 16px; color: var(--kcg-white); font: 700 11px/1 var(--kcg-utility); letter-spacing: .12em; text-transform: uppercase; }
.kcg-footer .hl-baseline-footer-list { margin: 0; padding: 0; list-style: none; }
.kcg-footer .hl-baseline-footer-list li { margin: 0 0 6px; }
.kcg-footer .hl-baseline-footer-list a,
.kcg-footer .hl-baseline-footer-link,
.kcg-footer .hl-baseline-footer-link:visited { min-height: 34px; display: inline-flex; align-items: center; color: #b7c8cf; text-decoration: none; font-size: 13px; font-weight: 650; line-height: 1.45; transition: color .18s ease, transform .18s ease; }
.kcg-footer .hl-baseline-footer-list a:visited { color: #b7c8cf; }
.kcg-footer .hl-baseline-footer-list a:hover,
.kcg-footer .hl-baseline-footer-list a:focus-visible,
.kcg-footer .hl-baseline-footer-link:hover,
.kcg-footer .hl-baseline-footer-link:focus-visible { color: var(--kcg-cyan); text-decoration: none; transform: translateX(3px); }
.kcg-footer-qr { width: 140px; max-width: 100%; min-height: 0; margin: 14px 0; }
.kcg-footer-qr:empty { display: none; }
.kcg-footer-qr img,
.kcg-footer-qr-img { width: 140px !important; height: 140px !important; max-width: 140px !important; object-fit: contain; background: #fff; padding: 6px; }
.kcg-footer-contact-link { min-height: 44px; padding: 0 16px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #4a6570; color: var(--kcg-white); text-decoration: none; font-size: 13px; font-weight: 800; }
.kcg-footer-contact-link:hover { background: var(--kcg-cyan); border-color: var(--kcg-cyan); color: var(--kcg-ink); }
.kcg-footer-bottom { width: min(1280px, 100%); margin: 42px auto 0; padding-top: 20px; border-top: 1px solid #304953; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; color: #91a6af; font-size: 11px; }
.kcg-footer-bottom nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: 16px; }
.kcg-footer-bottom a { color: #b7c8cf; text-decoration: none; }
.kcg-footer-bottom a:hover { color: var(--kcg-cyan); }

/* Project-specific posts list: leaderboard log, not a shared card preset. */
.hl-archive-main { padding-top: 56px !important; padding-bottom: 80px !important; }
.hl-news-query::before { content: "FIELD NOTES / 竞赛资讯"; display: block; margin-bottom: 28px; color: var(--kcg-cyan-dark); font: 700 12px/1 var(--kcg-utility); letter-spacing: .14em; }
.hl-news-list { display: grid !important; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 28px !important; list-style: none; margin: 0; padding: 0; border-top: 3px solid var(--kcg-ink); }
.hl-news-list > li { position: relative; min-width: 0; padding: 24px 0 28px 72px !important; display: grid !important; grid-template-columns: 132px 1fr; column-gap: 18px; align-content: start; border-bottom: 1px solid var(--kcg-line); }
.hl-news-list > li::before { content: counter(list-item, decimal-leading-zero); position: absolute; left: 0; top: 22px; color: var(--kcg-cyan-dark); font: 700 22px/1 var(--kcg-utility); }
.hl-news-cover { grid-column: 1; grid-row: 1 / span 3; margin: 0 !important; }
.hl-news-cover img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 0 !important; filter: saturate(.82); }
.hl-news-date { grid-column: 2; margin: 0 0 8px !important; color: var(--kcg-cyan-dark); font: 700 10px/1.4 var(--kcg-utility); letter-spacing: .08em; }
.hl-news-title { grid-column: 2; margin: 0 !important; font-family: var(--kcg-body) !important; font-size: clamp(19px,2vw,27px) !important; font-weight: 900 !important; line-height: 1.25 !important; letter-spacing: -.02em !important; }
.hl-news-title a { color: var(--kcg-ink); text-decoration: none; }
.hl-news-title a:hover { color: var(--kcg-cyan-dark); }
.hl-news-excerpt { grid-column: 2; margin: 12px 0 0 !important; color: var(--kcg-slate); font-size: 13px; line-height: 1.75; }
.hl-pagination { margin-top: 38px; padding-top: 22px; border-top: 1px solid var(--kcg-line); }

/* Article detail: compact editorial masthead; no empty visual column. */
.hl-article-main { padding-top: 36px !important; padding-bottom: 64px !important; }
.hl-article-head { max-width: 1000px !important; margin: 0 auto 30px !important; padding: clamp(28px,4vw,48px); display: flex !important; flex-direction: column; align-items: flex-start; box-sizing: border-box; border-top: 4px solid var(--kcg-ink); border-left: 12px solid var(--kcg-cyan); background: linear-gradient(135deg,var(--kcg-mist),var(--kcg-white) 72%); }
.hl-article-head::before { content: "KAGGLE FIELD NOTE"; order: 0; min-height: 0; margin: 0 0 22px; padding: 0; display: block; background: none; color: var(--kcg-cyan-dark); font: 700 11px/1 var(--kcg-utility); letter-spacing: .15em; }
.hl-article-head .hl-breadcrumb { order: 1; margin: 0 0 20px !important; }
.hl-article-head .wp-block-post-title { order: 2; max-width: 850px; margin: 0 0 18px !important; font-size: clamp(38px,4.6vw,58px) !important; line-height: 1.08 !important; letter-spacing: -.04em !important; }
.hl-article-head .wp-block-post-date { order: 3; margin: 0 !important; color: var(--kcg-slate) !important; font: 700 11px/1.6 var(--kcg-utility); letter-spacing: .08em; }
.hl-article-cover { order: 4; width: 100%; margin: 30px 0 0 !important; }
.hl-article-cover img { display: block; width: 100%; height: auto; max-height: 420px; aspect-ratio: 16 / 7; object-fit: cover; border-radius: 0 !important; }
.hl-article-body { max-width: 860px !important; margin-top: 0 !important; }
/* Baseline positions the fixed TOC against a 760px reading column. This site
   uses 860px, so keep the same 28px gutter by updating the half-width anchor. */
.hl-toc-float { --hl-reading-half: 430px; }
.hl-prose > :first-child { margin-top: 0 !important; }
.hl-prose h2 { border-top: 2px solid var(--kcg-ink); padding-top: 24px; }
.hl-prose a { color: var(--kcg-cyan-dark); text-underline-offset: 3px; }
.hl-toc-item.is-active { border-left-color: var(--kcg-cyan-dark); }
.hl-toc-item.is-active > a { color: var(--kcg-ink); }
.hl-back-to-top { background: var(--kcg-ink) !important; color: var(--kcg-white) !important; border-radius: 0 !important; }
.hl-post-tags a { border-radius: 0 !important; border-color: var(--kcg-line) !important; }
.hl-post-nav { border-top-color: var(--kcg-ink) !important; }
.hl-post-nav:not(:has(a)) { display: none !important; }
.hl-related { margin-top: 52px; border-top: 3px solid var(--kcg-ink); }
.hl-related-grid { gap: 1px !important; background: var(--kcg-line); }
.hl-related-card { border-radius: 0 !important; border: 0 !important; background: var(--kcg-white); }
/* Article CTA: editorial diagnosis card, scoped away from landing-page CTAs. */
.hl-prose .hl-article-cta { margin: 42px 0 !important; padding: 0 !important; display: grid !important; grid-template-columns: minmax(0,1fr) 220px; gap: 0 !important; align-items: stretch !important; overflow: hidden; border: 1px solid var(--kcg-line) !important; border-top: 4px solid var(--kcg-ink) !important; border-left: 8px solid var(--kcg-cyan) !important; border-radius: 0 !important; background: var(--kcg-white) !important; color: var(--kcg-ink) !important; }
.hl-prose .hl-article-cta-body { min-width: 0; padding: 32px 34px 34px; }
.hl-prose .hl-article-cta-title { max-width: 560px; margin: 0 0 10px !important; color: var(--kcg-ink) !important; font-size: clamp(22px,2.6vw,28px) !important; line-height: 1.25 !important; letter-spacing: -.025em !important; }
.hl-prose .hl-article-cta-sub { max-width: 560px; margin: 0 0 22px !important; color: var(--kcg-slate) !important; font-size: 13px !important; line-height: 1.75 !important; opacity: 1 !important; }
.hl-prose .hl-article-cta-bullets { margin: 0 0 24px !important; padding: 0 !important; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; color: var(--kcg-ink) !important; opacity: 1 !important; }
.hl-prose .hl-article-cta-bullets li { min-height: 58px; margin: 0 !important; padding: 11px 10px 10px 28px !important; display: flex; align-items: center; box-sizing: border-box; border-top: 2px solid var(--kcg-cyan); background: var(--kcg-mist); font-size: 11px; font-weight: 750; line-height: 1.5; }
.hl-prose .hl-article-cta-bullets li::before { left: 10px; top: 50%; color: var(--kcg-cyan-dark); transform: translateY(-50%); }
.hl-prose .hl-cta-online-btn { min-height: 48px; padding: 0 22px !important; display: inline-flex !important; align-items: center; justify-content: center; border: 1px solid var(--kcg-ink); border-radius: 0 !important; background: var(--kcg-ink) !important; color: var(--kcg-white) !important; font-size: 13px; font-weight: 900 !important; text-decoration: none !important; }
.hl-prose .hl-cta-online-btn::after { content: "↗"; margin-left: 10px; color: var(--kcg-cyan); font-size: 15px; }
.hl-prose .hl-cta-online-btn:hover { background: var(--kcg-cyan) !important; color: var(--kcg-ink) !important; opacity: 1; }
.hl-prose .hl-cta-online-btn:hover::after { color: var(--kcg-ink); }
.hl-prose .hl-article-cta-qr { min-width: 0; padding: 24px 18px; display: grid !important; place-items: center; align-content: center; box-sizing: border-box; border-left: 1px solid var(--kcg-ink); background: var(--kcg-cyan); color: var(--kcg-ink); }
.hl-prose .hl-cta-qr-panel { margin: 0 !important; }
.hl-prose .hl-cta-scan-img,
.hl-prose .hl-cta-qr-img { width: 138px !important; height: 138px !important; padding: 7px; border: 1px solid rgba(6,20,27,.16); border-radius: 0 !important; background: var(--kcg-white); }
.hl-prose .hl-cta-qr-panel figcaption,
.hl-prose .hl-article-cta-note { max-width: 150px; margin: 11px auto 0 !important; color: var(--kcg-ink) !important; font-size: 11px !important; font-weight: 800; line-height: 1.45; opacity: 1 !important; }

@media (max-width: 1180px) {
  .kcg-header-inner { width: min(100% - 28px, 1280px); gap: 14px; }
  .kcg-brand-copy small { display: none; }
  .kcg-nav-link { padding-inline: 6px; font-size: 12px; }
  .kcg-nav-link::after { left: 6px; right: 6px; }
  .kcg-tutoring-link { padding-inline: 12px; }
}

@media (max-width: 1024px) {
  .kcg-desktop-nav,
  .kcg-tutoring-link { display: none; }
  .kcg-menu-toggle { display: inline-flex; }
  .kcg-header-actions { margin-left: auto; }
  .kcg-footer-grid { grid-template-columns: 1.2fr 1fr; }
  .kcg-footer-contact { grid-column: 1 / -1; padding-top: 26px; border-top: 1px solid #304953; }
  .hl-news-list { grid-template-columns: 1fr !important; }
}

@media (max-width: 768px) {
  html { scroll-padding-top: 78px; }
  .kcg-header { height: 68px; }
  .kcg-header-spacer { height: 68px; }
  .kcg-header-inner { width: calc(100% - 24px); }
  .kcg-brand-mark { width: 32px; height: 32px; font-size: 22px; }
  .kcg-brand-copy strong { font-size: 15px; }
  .kcg-mobile-layer { grid-template-columns: 12vw 88vw; }
  .kcg-footer { padding-inline: 20px; }
  .kcg-footer-grid,
  .kcg-footer-nav { grid-template-columns: 1fr; }
  .kcg-footer-contact { grid-column: auto; }
  .kcg-footer-bottom { align-items: flex-start; flex-direction: column; }
  .kcg-footer-bottom nav { margin-left: 0; }
  .hl-news-list > li { padding: 20px 0 24px 52px !important; grid-template-columns: 96px 1fr; column-gap: 14px; }
  .hl-news-list > li::before { font-size: 17px; }
  .hl-news-excerpt { font-size: 12px; }
  .hl-article-main { padding-top: 24px !important; padding-bottom: 52px !important; }
  .hl-article-head { padding: 24px 22px; border-left-width: 7px; }
  .hl-article-head::before { margin-bottom: 18px; }
  .hl-article-head .hl-breadcrumb { margin-bottom: 16px !important; }
  .hl-article-head .wp-block-post-title { font-size: clamp(34px,11vw,46px) !important; line-height: 1.12 !important; }
  .hl-article-cover { margin-top: 22px !important; }
  .hl-article-cover img { max-height: 280px; aspect-ratio: 16 / 9; }
  .hl-related-grid { grid-template-columns: 1fr !important; }
  .hl-prose .hl-article-cta { grid-template-columns: 1fr; margin-block: 34px !important; border-left-width: 6px !important; }
  .hl-prose .hl-article-cta-body { padding: 26px 22px 24px; }
  .hl-prose .hl-article-cta-title { font-size: 23px !important; }
  .hl-prose .hl-article-cta-sub { margin-bottom: 18px !important; }
  .hl-prose .hl-article-cta-bullets { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 7px; margin-bottom: 18px !important; }
  .hl-prose .hl-article-cta-bullets li { min-height: 56px; }
  .hl-prose .hl-article-cta-bullets li:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .hl-prose .hl-cta-online-btn { width: 100%; box-sizing: border-box; }
  .hl-prose .hl-article-cta-qr { padding: 18px 22px; place-items: stretch; border-top: 1px solid var(--kcg-ink); border-left: 0; }
  .hl-prose .hl-cta-qr-panel { display: grid; grid-template-columns: 108px minmax(0,1fr); gap: 16px; align-items: center; text-align: left !important; }
  .hl-prose .hl-cta-scan-img,
  .hl-prose .hl-cta-qr-img { width: 108px !important; height: 108px !important; margin: 0 !important; }
  .hl-prose .hl-cta-qr-panel figcaption,
  .hl-prose .hl-article-cta-note { max-width: none; margin: 0 !important; font-size: 12px !important; }
}

@media (prefers-reduced-motion: reduce) {
  .kcg-nav-link::after { transition: none; }
}