:root {
  --ink: #141414;
  --ink-panel: #1E1E1E;
  --ink-deep: #0B0B0B;
  --line: #2E2E2E;
  --flame: #FF5A1F;
  --flame-soft: #FF8A4C;
  --cyan: #2DE2E6;
  --paper: #F5F1E8;
  --mist: #A8A29A;
  --amber: #FFC857;
  --cut: 14px;
  --shadow-hard: 8px 8px 0 rgba(0, 0, 0, 0.55);
  --shadow-soft: 3px 3px 0 rgba(0, 0, 0, 0.5);
  --shell: 1280px;
  --gutter: 24px;
  --font-display: "Archivo Black", "Archivo Expanded", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    radial-gradient(circle at 18% -10%, rgba(255, 90, 31, 0.16), transparent 46%),
    radial-gradient(circle at 92% 4%, rgba(45, 226, 230, 0.10), transparent 42%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.022) 0 1px, transparent 1px 4px);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

p { margin: 0 0 1em; max-width: 42em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: var(--flame); text-decoration: none; transition: color 160ms ease, border-color 160ms ease; }
a:hover { color: var(--flame-soft); }

strong { color: var(--paper); font-weight: 700; }
em { font-style: normal; color: var(--cyan); }

code, kbd, samp, .mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  letter-spacing: 0.02em;
}

img, svg, video { max-width: 100%; display: block; }

button { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

::selection { background: var(--flame); color: var(--ink-deep); }

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-narrow {
  width: 100%;
  max-width: 880px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: 88px; }
.section--tight { padding-block: 56px; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px 24px;
  margin-bottom: 40px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--line);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--flame);
  padding: 4px 10px;
  border: 1px solid var(--flame);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  align-self: center;
}

.section-title { font-size: clamp(28px, 4vw, 48px); }
.section-note { margin-left: auto; color: var(--mist); font-size: 14px; max-width: 30em; }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.divider {
  position: relative;
  height: 2px;
  margin-block: 48px;
  background: linear-gradient(90deg, var(--flame) 0 64px, var(--line) 64px 100%);
}
.divider::before {
  content: "";
  position: absolute;
  left: 64px;
  top: -4px;
  width: 10px;
  height: 10px;
  background: var(--cyan);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.2;
  cursor: pointer;
  background: transparent;
  color: var(--paper);
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.btn-primary {
  background: var(--flame);
  color: var(--ink-deep);
  border-color: var(--flame);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.6);
}
.btn-primary:hover { background: var(--flame-soft); border-color: var(--flame-soft); color: var(--ink-deep); box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.6); transform: translate(2px, 2px); }

.btn-ghost {
  border-color: var(--line);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--flame); color: var(--flame); }

.btn-quick {
  background: var(--flame);
  color: var(--ink-deep);
  border: 2px solid var(--flame);
  padding: 8px 16px;
  font-size: 13px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.btn-quick:hover { background: var(--flame-soft); border-color: var(--flame-soft); color: var(--ink-deep); }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--cyan);
  color: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  border: 2px solid var(--ink-deep);
  transition: top 180ms ease;
}
.skip-link:focus { top: 16px; color: var(--ink-deep); }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.86) 0%, rgba(20, 20, 20, 0.28) 72%, rgba(20, 20, 20, 0) 100%);
  border-bottom: 2px solid transparent;
  transition: background-color 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header[data-scrolled="true"] {
  background: var(--ink-deep);
  border-bottom-color: var(--flame);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 78px;
  padding-block: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
  flex: 0 0 auto;
}
.brand:hover { color: var(--paper); }

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  background: var(--flame);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  box-shadow: inset 0 0 0 2px rgba(11, 11, 11, 0.55);
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px 9px 9px 9px;
  background: var(--ink-deep);
  clip-path: polygon(0 0, 100% 0, 100% 60%, 60% 100%, 0 100%);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }

.brand-name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.brand-line {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  margin-top: 3px;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 42px;
  margin-left: auto;
  padding: 0;
  background: var(--ink-panel);
  border: 2px solid var(--line);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle[aria-expanded="true"] { border-color: var(--flame); }
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--paper);
  transition: transform 200ms ease, opacity 160ms ease, background-color 160ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: var(--flame); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 12px;
  color: var(--paper);
  font-size: 15px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.nav-link:hover { color: var(--flame); border-bottom-color: var(--flame); }

.nav-link-index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.nav-link[aria-current="page"] {
  color: var(--flame);
  border-bottom-color: var(--flame);
  background: rgba(255, 90, 31, 0.08);
}
.nav-link[aria-current="page"] .nav-link-index { color: var(--flame); }

/* league bar */
.league-bar {
  border-top: 1px solid rgba(46, 46, 46, 0.7);
  background: rgba(11, 11, 11, 0.42);
  transition: background-color 220ms ease;
}
.site-header[data-scrolled="true"] .league-bar { background: var(--ink-deep); border-top-color: var(--line); }

.league-tabs {
  display: flex;
  gap: 6px;
  padding-block: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.league-tabs::-webkit-scrollbar { display: none; }

.league-tab {
  flex: 0 0 auto;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--mist);
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.league-tab:hover { color: var(--paper); border-bottom-color: var(--line); }
.league-tab.is-active {
  color: var(--ink-deep);
  background: var(--cyan);
  border-bottom-color: var(--cyan);
}
.league-tab.is-active:hover { color: var(--ink-deep); border-bottom-color: var(--cyan); }

/* ---------- panels & shared widgets ---------- */
.panel {
  position: relative;
  background: var(--ink-panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: 26px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: box-shadow 200ms ease, border-color 200ms ease, transform 200ms ease;
}
.panel:hover { border-color: var(--flame); box-shadow: var(--shadow-soft); }

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.panel-title { font-size: 20px; letter-spacing: -0.01em; }
.panel-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.data-value {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
  display: inline-block;
}
.data-value--cyan { color: var(--cyan); }
.data-value--orange { color: var(--flame); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  color: var(--mist);
  background: rgba(11, 11, 11, 0.4);
}
.tag-orange { border-color: var(--flame); color: var(--flame); }
.tag-cyan { border-color: var(--cyan); color: var(--cyan); }

.meter {
  position: relative;
  height: 8px;
  width: 100%;
  background: rgba(245, 241, 232, 0.1);
  border: 1px solid var(--line);
  overflow: hidden;
}
.meter-fill {
  display: block;
  height: 100%;
  background: var(--flame);
  transition: width 500ms ease;
}
.meter-fill--cyan { background: var(--cyan); }
.meter-fill--orange { background: var(--flame); }

/* ---------- breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.crumb { color: var(--mist); }
.crumb:hover { color: var(--flame); }
.crumb[aria-current="page"] { color: var(--paper); }
.crumb-sep { color: var(--line); }

/* ---------- media frames ---------- */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--ink-deep);
  border: 2px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.media-frame-wide { aspect-ratio: 21 / 9; }
.media-frame-square { aspect-ratio: 1 / 1; }
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.12) saturate(0.94);
  transition: transform 420ms ease;
}
.media-frame:hover > img { transform: scale(1.04); }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.1) 0%, rgba(20, 20, 20, 0.72) 100%);
  pointer-events: none;
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: 96px;
  background: var(--ink-deep);
  border-top: 2px solid var(--flame);
  padding-block: 64px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 0.78fr) 1.5fr;
  gap: 32px 28px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.brand--footer .brand-name { font-size: 24px; }

.footer-tagline { color: var(--mist); font-size: 14px; max-width: 30em; margin: 0; }

.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.footer-col-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
  color: var(--paper);
}
.footer-col-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--flame);
}

.footer-list { display: flex; flex-direction: column; gap: 10px; }
.footer-list a {
  color: var(--mist);
  font-size: 14px;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.footer-list a:hover { color: var(--flame); border-bottom-color: var(--flame); }

.footer-contact-card {
  position: relative;
  background: var(--ink-panel);
  border: 2px solid var(--flame);
  box-shadow: var(--shadow-hard);
  padding: 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.footer-contact-title {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.footer-contact-list { display: flex; flex-direction: column; gap: 12px; margin: 0; }
.footer-contact-row { display: flex; flex-direction: column; gap: 2px; }
.footer-contact-row dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-contact-row dd { margin: 0; font-size: 13px; color: var(--paper); line-height: 1.6; word-break: break-word; }
.footer-contact-row dd a { color: var(--paper); border-bottom: 1px solid var(--line); }
.footer-contact-row dd a:hover { color: var(--flame); border-bottom-color: var(--flame); }

.footer-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--mist);
  line-height: 1.6;
  max-width: 100%;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 22px 28px;
}
.footer-copy { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--mist); margin: 0; max-width: none; }
.footer-legal-links { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; font-size: 12px; color: var(--line); }
.footer-legal-links a { color: var(--mist); }
.footer-legal-links a:hover { color: var(--flame); }

/* ---------- back to top ---------- */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 110;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  background: var(--ink-panel);
  color: var(--paper);
  border: 2px solid var(--flame);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms ease, background-color 180ms ease, color 180ms ease;
}
.back-to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--flame); color: var(--ink-deep); }
.back-to-top-arrow { font-size: 14px; line-height: 1; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: 1.3fr repeat(2, 0.9fr); }
  .footer-contact-card { grid-column: 1 / -1; }
  .section-note { margin-left: 0; width: 100%; }
}

@media (max-width: 920px) {
  .header-inner { flex-wrap: wrap; row-gap: 10px; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 130;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 96px 24px 40px;
    margin: 0;
    background: var(--ink-deep);
    background-image: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 5px);
    overflow-y: auto;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 260ms ease, visibility 260ms ease;
  }
  .site-nav[data-open="true"] { transform: translateX(0); visibility: visible; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .nav-item { border-bottom: 1px solid var(--line); }
  .nav-link {
    justify-content: flex-start;
    padding: 16px 4px;
    font-size: 19px;
    border-bottom: 2px solid transparent;
    width: 100%;
  }
  .nav-link[aria-current="page"] { background: rgba(255, 90, 31, 0.1); }
  .nav-link-index { font-size: 12px; }
  .btn-quick { align-self: flex-start; margin-top: 24px; padding: 12px 22px; font-size: 14px; }
  .league-bar { border-top-color: var(--line); }
  .grid { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .span-7, .span-8 { grid-column: span 8; }
  .span-5, .span-6 { grid-column: span 8; }
  .span-3, .span-4 { grid-column: span 4; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .section { padding-block: 64px; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .header-inner { min-height: 64px; padding-block: 10px; }
  .brand-name { font-size: 18px; }
  .brand-line { font-size: 9px; letter-spacing: 0.12em; }
  .brand-mark { width: 28px; height: 28px; }
  .brand-mark::after { inset: 7px; }
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: span 4; }
  .panel { padding: 20px; --cut: 10px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-contact-card { grid-column: auto; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .back-to-top { right: 12px; bottom: 12px; padding: 8px 12px; }
  .section { padding-block: 48px; }
  .divider { margin-block: 32px; }
  .league-tab { padding: 6px 12px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .panel:hover { transform: none; }
  .media-frame:hover > img { transform: none; }
}