/* ============================================================
   九州体育 · 共享 Site Kit — /assets/site.css
   ============================================================ */

:root {
  --red: #D7263D;
  --red-soft: #F06A75;
  --night: #0B1B33;
  --ink: #070B12;
  --bone: #F5F1E8;
  --mint: #31F2C3;
  --gold: #F2B441;
  --steel: #6E7B8B;
  --frost: #C9D8E8;
  --rain: #142C4D;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --rail-w: 280px;
  --shell-max: 1440px;
  --gutter: clamp(16px, 3vw, 44px);
  --radius-cut: 14px;

  --line: rgba(201, 216, 232, 0.18);
  --line-strong: rgba(201, 216, 232, 0.38);
  --shadow-panel: 0 18px 48px rgba(3, 8, 18, 0.45);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 200ms;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 中文排版 ---------- */
body { letter-spacing: 0.01em; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 900; letter-spacing: -0.02em; line-height: 1.12; text-wrap: balance; }
p { text-wrap: pretty; }
strong { font-weight: 700; color: var(--bone); }
.num, .data-figure-value { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 10px 16px;
  background: var(--red);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  border-radius: 4px;
  transform: translateY(-160%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  width: var(--rail-w);
  background:
    linear-gradient(180deg, #0D2039 0%, var(--night) 46%, #081426 100%);
  border-right: 1px solid var(--line);
  color: var(--bone);
  overflow: hidden;
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--red) 0 38%, var(--gold) 38% 52%, var(--mint) 52% 100%);
  opacity: 0.9;
}
.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 120px;
  background: repeating-linear-gradient(135deg, rgba(201,216,232,0.06) 0 1px, transparent 1px 11px);
  pointer-events: none;
}
.header-shell {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 26px 22px 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* brand */
.brand-lockup { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  background: var(--red);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 66%, 66% 100%, 0 100%);
  transition: background var(--dur) var(--ease);
}
.brand-mark span { font-size: 11px; margin-left: 1px; opacity: 0.85; }
.brand-mark:hover { background: var(--red-soft); }
.brand-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand-line { font-family: var(--font-display); font-weight: 900; font-size: 15px; letter-spacing: -0.01em; }
.brand-descriptor {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mint);
  border-top: 1px solid var(--line);
  padding-top: 3px;
}

/* rail nav */
.nav-rail { display: flex; flex-direction: column; margin-top: 34px; flex: 1 1 auto; }
.rail-caption {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--steel);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.rail-caption::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.nav-list { display: flex; flex-direction: column; gap: 2px; }
.nav-item { position: relative; }
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px 11px 20px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--frost);
  border-left: 1px solid var(--line);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), padding var(--dur) var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--red);
  transform: translateY(-50%);
  transition: height var(--dur) var(--ease);
}
.nav-link::after {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--steel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.5;
  margin-left: auto;
  transition: background var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-link:hover { color: var(--bone); background: rgba(201, 216, 232, 0.06); padding-left: 24px; }
.nav-link:hover::after { background: var(--mint); opacity: 1; }
.nav-link[aria-current="page"] {
  color: #fff;
  font-weight: 700;
  background: linear-gradient(90deg, rgba(215, 38, 61, 0.22), rgba(215, 38, 61, 0));
  border-left-color: var(--red);
}
.nav-link[aria-current="page"]::before { height: 26px; }
.nav-link[aria-current="page"]::after { background: var(--red); opacity: 1; }

.rail-meta {
  margin-top: auto;
  padding-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail-utility {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.rail-status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  border: 1px solid rgba(242, 180, 65, 0.32);
  background: rgba(242, 180, 65, 0.07);
  padding: 6px 9px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.rail-dot {
  width: 6px; height: 6px; flex: 0 0 auto;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(242, 180, 65, 0.18);
}

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  color: var(--bone);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.nav-toggle-bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: var(--mint);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle-text { font-size: 12px; font-weight: 500; letter-spacing: 0.1em; }

.header-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(4, 9, 18, 0.66);
  backdrop-filter: blur(2px);
}
.header-backdrop[hidden] { display: none; }

/* scroll meter */
.scroll-meter {
  position: absolute;
  right: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(201, 216, 232, 0.08);
  z-index: 3;
}
.scroll-meter-fill {
  display: block;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--mint), var(--red));
  transition: height 90ms linear;
}

/* ---------- 内容外壳 ---------- */
.main-content {
  margin-left: var(--rail-w);
  padding: calc(var(--gutter) + 16px) var(--gutter) 80px;
  min-height: 100vh;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(20, 44, 77, 0.9), transparent 62%),
    radial-gradient(760px 420px at 4% 22%, rgba(215, 38, 61, 0.10), transparent 70%),
    var(--ink);
}
.page-shell {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
}
.section-wrap { margin-top: 56px; }
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}
.split-aside { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}
.breadcrumb-item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--red);
  font-family: var(--font-mono);
}
.breadcrumb-item a:hover { color: var(--mint); }
.breadcrumb-item [aria-current="page"] { color: var(--bone); font-weight: 500; }

/* ---------- 切角面板 ---------- */
.cut-panel {
  position: relative;
  background: rgba(20, 44, 77, 0.55);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 30px);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  box-shadow: var(--shadow-panel);
}
.cut-panel--light {
  background: var(--bone);
  color: var(--ink);
  border-color: rgba(7, 11, 18, 0.12);
  box-shadow: 0 16px 40px rgba(3, 8, 18, 0.28);
}
.cut-panel--light :where(h2, h3, h4) { color: var(--ink); }
.cut-panel--deep {
  background: linear-gradient(150deg, #0E2440, #081426 72%);
  border-color: var(--line-strong);
}

/* ---------- 数据数字 ---------- */
.data-figure { display: flex; flex-direction: column; gap: 2px; }
.data-figure-value {
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 600;
  line-height: 1;
  color: var(--mint);
}
.data-figure-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}
.cut-panel--light .data-figure-label { color: #55606e; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  border: 1px solid var(--line-strong);
  color: var(--frost);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 7px 100%, 0 calc(100% - 7px));
  white-space: nowrap;
}
.tag--accent { border-color: rgba(49, 242, 195, 0.45); background: rgba(49, 242, 195, 0.1); color: var(--mint); }
.tag--gold { border-color: rgba(242, 180, 65, 0.5); background: rgba(242, 180, 65, 0.1); color: var(--gold); }
.tag--ghost { background: transparent; color: var(--steel); border-color: var(--line); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-soft); }
.btn--ghost { border-color: var(--line-strong); color: var(--bone); }
.btn--ghost:hover { border-color: var(--mint); color: var(--mint); }
.btn--quiet { color: var(--frost); padding: 8px 0; }
.btn--quiet:hover { color: var(--mint); }
.btn--block { width: 100%; margin-top: 6px; }

/* ---------- 装饰 ---------- */
.rule-mark {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--red);
  margin: 14px 0;
}
.rule-mark--slanted {
  width: 64px;
  height: 10px;
  background: repeating-linear-gradient(115deg, var(--gold) 0 2px, transparent 2px 9px);
}

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    repeating-linear-gradient(45deg, rgba(201, 216, 232, 0.07) 0 1px, transparent 1px 12px),
    linear-gradient(140deg, #122A48, #081426);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.06);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-left: var(--rail-w);
  background:
    linear-gradient(180deg, #0A1830 0%, var(--ink) 100%);
  color: var(--bone);
  border-top: 1px solid var(--line-strong);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0 10%, var(--red) 10% 42%, var(--mint) 42% 58%, transparent 58%);
}
.footer-shell {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 52px var(--gutter) 26px;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 2fr;
  gap: clamp(26px, 4vw, 64px);
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}
.footer-mark {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: var(--red);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  clip-path: polygon(0 0, 100% 0, 100% 66%, 66% 100%, 0 100%);
}
.footer-mark span { font-size: 10px; margin-left: 1px; opacity: 0.85; }
.footer-brand-name {
  margin-top: 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
}
.footer-brand-line {
  margin-top: 3px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mint);
}
.footer-note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--steel);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.footer-col-title::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.footer-list { display: flex; flex-direction: column; gap: 8px; }
.footer-list a {
  font-size: 13.5px;
  color: var(--frost);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer-list a:hover { color: var(--mint); padding-left: 4px; }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.footer-contact-line {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--frost);
  letter-spacing: 0.01em;
}
.footer-contact-line a { color: var(--mint); border-bottom: 1px solid rgba(49, 242, 195, 0.35); }
.footer-contact-line a:hover { color: #fff; border-bottom-color: #fff; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  padding-top: 20px;
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
}
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-legal-links a {
  font-size: 12px;
  color: var(--frost);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-legal-links a:hover { color: var(--mint); border-color: var(--mint); }

.back-to-top {
  margin-left: auto;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--night);
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.back-to-top[data-visible="true"] { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--mint); }

/* ---------- 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}
[data-reveal][data-revealed="true"] { opacity: 1; transform: none; }

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1180px) {
  :root { --rail-w: 244px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .content-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-aside { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 响应式：移动抽屉 ---------- */
@media (max-width: 820px) {
  .site-header {
    position: sticky;
    inset: 0 auto auto 0;
    width: 100%;
    height: auto;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }
  .site-header::after { display: none; }
  .header-shell {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    overflow: visible;
    height: auto;
  }
  .brand-mark { width: 38px; height: 38px; font-size: 17px; }
  .brand-line { font-size: 13.5px; }
  .brand-descriptor { font-size: 9.5px; letter-spacing: 0.1em; }

  .nav-toggle { display: inline-flex; }

  .nav-rail {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 60;
    width: min(86vw, 340px);
    height: 100%;
    margin: 0;
    padding: 74px 20px 26px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0E2440, #071224 78%);
    border-left: 1px solid var(--line-strong);
    box-shadow: -24px 0 60px rgba(3, 8, 18, 0.6);
    transform: translateX(104%);
    transition: transform 240ms var(--ease);
  }
  .site-header[data-open="true"] .nav-rail { transform: translateX(0); }
  .site-header[data-open="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .site-header[data-open="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
  .site-header[data-open="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

  .nav-list { gap: 1px; }
  .nav-link { font-size: 15px; padding: 13px 14px 13px 20px; }
  .rail-caption { margin-bottom: 14px; }
  .rail-meta { padding-top: 28px; }
  .rail-status { font-size: 11.5px; }

  .header-backdrop { z-index: 50; }

  .main-content { margin-left: 0; padding: 26px 16px 64px; }

  .site-footer { margin-left: 0; }
  .footer-shell { padding: 40px 16px 22px; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .footer-contact { flex-direction: column; align-items: flex-start; }
  .back-to-top { margin-left: 0; }

  .scroll-meter { position: fixed; left: 0; right: 0; top: 0; width: 100%; height: 2px; }
  .scroll-meter-fill { height: 100%; width: 0%; transition: width 90ms linear; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .footer-cols { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-legal-links { gap: 12px; }
  .nav-rail { width: min(92vw, 320px); }
}

/* ---------- 动效可访问 ---------- */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .scroll-meter-fill { transition: none; }
}