/* ==========================================================================
   乐竞体育 / gateway-e-lejing.com.cn
   site.css — reset, tokens, typography, shared header & footer, base kit
   ========================================================================== */

/* ---------- 01 reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}

table { border-collapse: collapse; width: 100%; }

main { display: block; }

[id] { scroll-margin-top: 104px; }

/* ---------- 02 tokens ---------- */
:root {
  --blue-deep: #0B3F73;
  --blue-sky: #1E7FD0;
  --blue-pale: #A9D6F2;
  --snow: #F6F9FC;
  --white: #FFFFFF;
  --ink: #14202E;
  --rock: #5B6B7C;
  --flag-red: #D2401E;
  --flag-yellow: #E9B23C;
  --flag-green: #2E9E6B;
  --night: #071A2E;

  --line: rgba(11, 63, 115, 0.22);
  --line-soft: rgba(11, 63, 115, 0.12);
  --radius: 2px;
  --gap: 8px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.16s;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system,
    "Segoe UI", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Roboto Condensed",
    "Helvetica Neue", Arial, ui-monospace, monospace;
}

/* ---------- 03 base typography ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background: var(--snow);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
  color: var(--blue-deep);
}
h1 { font-size: clamp(2.25rem, 4.6vw, 4.5rem); }
h2 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
h3 { font-size: 1.25rem; line-height: 1.3; }
h4 { font-size: 1.0625rem; line-height: 1.4; }

a {
  color: var(--blue-sky);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
a:hover { color: var(--blue-deep); }

strong, b { font-weight: 700; }
small { font-size: 12px; letter-spacing: 0.06em; color: var(--rock); }

:focus-visible {
  outline: 2px solid var(--blue-sky);
  outline-offset: 2px;
}
.site-footer :focus-visible { outline-color: #A9D6F2; }

/* ---------- 04 layout utilities ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 24px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.grid--tight { gap: 8px; }
.grid__span-3 { grid-column: span 3; }
.grid__span-4 { grid-column: span 4; }
.grid__span-6 { grid-column: span 6; }
.grid__span-8 { grid-column: span 8; }
.grid__span-12 { grid-column: span 12; }

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

/* ---------- 05 shared atoms ---------- */
.eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3em;
  line-height: 1.6;
  color: var(--rock);
  text-transform: uppercase;
}

.vertical-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--rock);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--blue-deep);
}
.section-head__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--blue-deep);
}
.section-head__title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--flag-red);
  transform: translateY(1px);
}
.section-head__note {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--rock);
  white-space: nowrap;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--blue-deep);
  border-radius: var(--radius);
  background: transparent;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:hover {
  background: var(--blue-deep);
  color: var(--white);
  border-color: var(--blue-deep);
}
.btn--primary {
  background: var(--flag-red);
  border-color: var(--flag-red);
  color: var(--white);
}
.btn--primary:hover {
  background: #B33417;
  border-color: #B33417;
  color: var(--white);
}
.btn--ghost {
  border-color: var(--line);
  color: var(--blue-deep);
  background: var(--white);
}
.btn--ghost:hover {
  border-color: var(--blue-deep);
  background: var(--blue-pale);
  color: var(--blue-deep);
}

/* tags — 经幡五色 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--snow);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.6;
}
.tag--red { background: var(--flag-red); border-color: var(--flag-red); color: #fff; }
.tag--yellow { background: var(--flag-yellow); border-color: var(--flag-yellow); color: #4A3606; }
.tag--green { background: var(--flag-green); border-color: var(--flag-green); color: #fff; }
.tag--blue { background: var(--blue-sky); border-color: var(--blue-sky); color: #fff; }
.tag--pale { background: var(--blue-pale); border-color: var(--blue-pale); color: var(--blue-deep); }

/* cards */
.card {
  position: relative;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 2px;
  background: var(--flag-red);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.18s var(--ease);
}
.card:hover,
.card:focus-within { border-color: rgba(11, 63, 115, 0.4); }
.card:hover::before,
.card:focus-within::before { transform: scaleY(1); }
.card__title {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--blue-deep);
}
.card__meta {
  margin-top: 8px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rock);
}
.card__text {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

/* stats */
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat__value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--blue-deep);
}
.stat__label {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--rock);
}

/* figure / 图片容器基础规则（页面阶段放入 <img> 到 .figure__media） */
.figure { margin: 0; }
.figure__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--blue-pale);
}
.figure__frame--wide { aspect-ratio: 21 / 9; }
.figure__frame--square { aspect-ratio: 1 / 1; }
.figure__media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.figure__cap {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--rock);
}

/* breadcrumb */
.breadcrumb { font-size: 13px; color: var(--rock); }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--line);
}
.breadcrumb a { color: var(--rock); }
.breadcrumb a:hover { color: var(--blue-sky); }
.breadcrumb [aria-current="page"] { color: var(--blue-deep); font-weight: 500; }

/* prose */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}
.prose > * + * { margin-top: 16px; }
.prose p { max-width: 72ch; }
.prose h2 { margin-top: 40px; font-size: 1.6rem; }
.prose h3 { margin-top: 28px; font-size: 1.15rem; }
.prose ul, .prose ol { padding-left: 1.25em; }
.prose li + li { margin-top: 6px; }
.prose a { border-bottom: 1px solid rgba(30, 127, 208, 0.4); }
.prose blockquote {
  padding: 16px 20px;
  border-left: 3px solid var(--flag-yellow);
  background: var(--blue-pale);
  color: var(--blue-deep);
  font-weight: 500;
}

/* ---------- 06 header / frame navigation ---------- */
.skip-link {
  position: fixed;
  left: 8px;
  top: -64px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--blue-deep);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 8px; color: #FFFFFF; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: #F6F9FC;
  border-bottom: 1px solid #0B3F73;
}

.frame-rail { display: none; }

@media (min-width: 1200px) {
  .frame-rail {
    display: block;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: #0B3F73;
    opacity: 0.45;
    z-index: 70;
    pointer-events: none;
  }
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--flag-red);
  transition: width 0.1s linear;
  pointer-events: none;
  z-index: 3;
}

.header-top {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 0 24px;
  max-width: 1600px;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  color: #0B3F73;
  text-decoration: none;
  flex: 0 0 auto;
}
.brand:hover { color: #1E7FD0; }
.brand__mark {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
  color: #0B3F73;
}
.brand__suffix {
  padding-left: 12px;
  border-left: 1px solid rgba(11, 63, 115, 0.3);
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.3em;
  line-height: 1.6;
  text-transform: uppercase;
  color: #1E7FD0;
}

.frame-note {
  margin-left: 8px;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: #5B6B7C;
  white-space: nowrap;
}

.header-utility {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.utility-link,
.utility-toggle {
  padding: 9px 12px;
  border: 1px solid rgba(11, 63, 115, 0.24);
  border-radius: var(--radius);
  background: #FFFFFF;
  color: #0B3F73;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.utility-link:hover,
.utility-toggle:hover {
  background: #0B3F73;
  border-color: #0B3F73;
  color: #FFFFFF;
}
.utility-toggle[aria-pressed="true"] {
  background: #0B3F73;
  border-color: #0B3F73;
  color: #FFFFFF;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid #0B3F73;
  border-radius: var(--radius);
  background: #0B3F73;
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1;
  cursor: pointer;
}
.nav-toggle__label { line-height: 1; }
.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
}
.nav-toggle__icon > span {
  display: block;
  height: 2px;
  background: #FFFFFF;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.site-nav {
  display: block;
  border-top: 1px solid rgba(11, 63, 115, 0.18);
  background: #F6F9FC;
}
.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: 0;
  max-width: 1600px;
  margin-inline: auto;
  padding: 0 24px;
  list-style: none;
}
.site-nav__list > li { display: flex; }
.site-nav__list > li + li { border-left: 1px solid rgba(11, 63, 115, 0.14); }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 13px 20px;
  color: #0B3F73;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav__link:hover {
  color: #1E7FD0;
  background: rgba(169, 214, 242, 0.28);
}
.site-nav__num {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #5B6B7C;
}
.site-nav__link[aria-current="page"] { color: #1E7FD0; }
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: -1px;
  width: 26px;
  height: 3px;
  background: #D2401E;
}

@keyframes navIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .header-top {
    min-height: 62px;
    padding: 0 16px;
    gap: 12px;
  }
  .frame-note { display: none; }
  .nav-toggle { display: inline-flex; }
  .brand__mark { font-size: 20px; }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #FFFFFF;
    border-top: 1px solid rgba(11, 63, 115, 0.2);
    border-bottom: 1px solid #0B3F73;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .site-nav[data-open] {
    display: block;
    animation: navIn 0.18s var(--ease) both;
  }
  .site-nav__list {
    flex-direction: column;
    padding: 0;
    max-width: none;
  }
  .site-nav__list > li + li {
    border-left: 0;
    border-top: 1px solid rgba(11, 63, 115, 0.16);
  }
  .site-nav__link {
    width: 100%;
    padding: 15px 18px;
    font-size: 16px;
    gap: 10px;
  }
  .site-nav__link[aria-current="page"]::after {
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    height: auto;
  }
}

@media (max-width: 560px) {
  .utility-link { display: none; }
  .header-top { gap: 8px; }
  .brand__suffix { display: none; }
  .utility-toggle { padding: 8px 10px; font-size: 11px; letter-spacing: 0.08em; }
}

/* ---------- 07 footer ---------- */
.site-footer {
  position: relative;
  margin-top: 88px;
  background: var(--night);
  color: #BFD3E4;
  border-top: 1px solid #0B3F73;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(169, 214, 242, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 214, 242, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr);
  gap: 48px;
  max-width: 1240px;
  margin-inline: auto;
  padding: 64px 24px 40px;
}

.footer-brand__mark {
  display: block;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: #FFFFFF;
}
.footer-brand__suffix {
  display: block;
  margin-top: 6px;
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: #A9D6F2;
}
.footer-brand__note {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #9FBBD4;
}

.flagstrip {
  display: flex;
  gap: 6px;
  margin-top: 18px;
}
.flagstrip > span {
  display: block;
  width: 6px;
  height: 26px;
  background: #FFFFFF;
}
.flagstrip > span:nth-child(1) { background: #D2401E; }
.flagstrip > span:nth-child(2) { background: #E9B23C; }
.flagstrip > span:nth-child(3) { background: #2E9E6B; }
.flagstrip > span:nth-child(4) { background: #1E7FD0; }
.flagstrip > span:nth-child(5) { background: #F6F9FC; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-col { min-width: 0; }
.footer-col__title {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: #A9D6F2;
}
.footer-col__list {
  display: grid;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col__list a {
  display: inline-block;
  padding-bottom: 1px;
  color: #C6D8E8;
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-col__list a:hover {
  color: #FFFFFF;
  border-bottom-color: #E9B23C;
}

.footer-contact {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid rgba(169, 214, 242, 0.2);
}
.footer-contact__line {
  font-size: 13px;
  line-height: 1.9;
  color: #BFD3E4;
  word-break: break-word;
}
.footer-contact__note {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #8FAAC2;
}

.footer-base {
  position: relative;
  border-top: 1px solid rgba(169, 214, 242, 0.16);
}
.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: 1240px;
  margin-inline: auto;
  padding: 20px 24px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #8FAAC2;
}
.footer-base__icp { color: #8FAAC2; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-legal a {
  color: #C6D8E8;
  border-bottom: 1px solid transparent;
}
.footer-legal a:hover {
  color: #FFFFFF;
  border-bottom-color: #1E7FD0;
}
.footer-base__signature {
  font-family: var(--font-num);
  letter-spacing: 0.14em;
  color: #A9D6F2;
}
.footer-base__copy { color: #8FAAC2; }

@media (max-width: 900px) {
  .site-footer { margin-top: 64px; }
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 48px 16px 32px;
  }
  .footer-nav { gap: 20px; }
  .footer-base__inner { padding: 18px 16px; }
}

@media (max-width: 560px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base__inner { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ---------- 08 motion ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
html.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 09 dark reading mode（只影响阅读区与卡片） ---------- */
html[data-reading-dark] body { background: #08192B; color: #E4EEF7; }
html[data-reading-dark] h1,
html[data-reading-dark] h2,
html[data-reading-dark] h3,
html[data-reading-dark] h4,
html[data-reading-dark] .card__title { color: #EAF3FB; }
html[data-reading-dark] .card {
  background: #0E2A42;
  border-color: rgba(169, 214, 242, 0.22);
}
html[data-reading-dark] .card__text,
html[data-reading-dark] .prose { color: #DCE8F3; }
html[data-reading-dark] .prose blockquote {
  background: #0E2A42;
  color: #E4EEF7;
  border-left-color: #E9B23C;
}
html[data-reading-dark] .stat__label,
html[data-reading-dark] .card__meta,
html[data-reading-dark] .figure__cap { color: #93AABE; }
html[data-reading-dark] .card .tag {
  background: #0A1F33;
  border-color: rgba(169, 214, 242, 0.28);
  color: #CFE4F5;
}

/* ---------- 10 responsive typography & grids ---------- */
@media (max-width: 900px) {
  .grid { gap: 12px; }
  .grid__span-3,
  .grid__span-4,
  .grid__span-6,
  .grid__span-8 { grid-column: span 12; }
  .section-head { flex-wrap: wrap; align-items: flex-start; }
  .section-head__note { white-space: normal; }
}

@media (max-width: 640px) {
  .container { padding-inline: 16px; }
  h1 { font-size: clamp(2rem, 9vw, 2.75rem); }
  .stat__value { font-size: 26px; }
}

/* ---------- 11 reduced motion ---------- */
@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-progress { transition: none; }
  html.js-reveal [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .card::before { transform: scaleY(1); }
}