/* ============================================================
   开云体育主站 — 共享样式 /assets/site.css
   球场夜灯 + 战术板：切角、斜线、等宽数字、分区珠宝色
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --c-ink: #0B1B2B;
  --c-green: #0E2A24;
  --c-board: #143D32;
  --c-wine: #6B1F2E;
  --c-red: #D7263D;
  --c-lime: #C8FF3D;
  --c-indigo: #2B2A5E;
  --c-mist: #F2F5F0;
  --c-stone: #A9B7AE;
  --c-paper: #F7F2E8;
  --c-gold: #D9B26A;

  --font-cond: "Barlow Condensed", "Oswald", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --w-max: 1240px;
  --pad-x: clamp(1rem, 4vw, 3rem);
  --gap: clamp(1rem, 2.2vw, 2rem);
  --header-h: 74px;
  --cut: 14px;

  --line: rgba(242, 245, 240, 0.14);
  --line-strong: rgba(242, 245, 240, 0.3);
  --shadow-deep: 0 26px 48px -28px rgba(0, 0, 0, 0.95);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body {
  margin: 0;
  background-color: var(--c-ink);
  color: var(--c-mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

button,
input,
select,
textarea { font: inherit; color: inherit; }

p { margin: 0; }
ul,
ol { margin: 0; padding: 0; }
a { color: inherit; }

::selection {
  background: var(--c-lime);
  color: var(--c-ink);
}

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

#main-content {
  display: block;
  scroll-margin-top: calc(var(--header-h) + 12px);
}

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-cond);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--c-mist);
}

h1 { font-size: clamp(1.9rem, 4.4vw, 3.1rem); }
h2 { font-size: clamp(1.45rem, 2.8vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.35rem); }
h4 { font-size: 1.02rem; }

.serif { font-family: var(--font-serif); font-weight: 700; letter-spacing: 0.01em; }
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-cond);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--c-lime);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--c-red);
  flex: none;
}

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.section { padding-block: clamp(2.25rem, 5.5vw, 4.5rem); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-bottom: 0.9rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.75fr); }
.grid--mirror { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.hairline {
  height: 1px;
  border: 0;
  margin: 1.5rem 0;
  background: linear-gradient(90deg, var(--c-red), var(--c-indigo) 45%, transparent);
}

/* ---------- 5. 切角面板与标签 ---------- */
.panel {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.6rem);
  background: var(--c-board);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.panel--wine { background: var(--c-wine); }
.panel--indigo { background: var(--c-indigo); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.55rem;
  font-family: var(--font-cond);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  line-height: 1.6;
  background: var(--c-indigo);
  color: var(--c-mist);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.tag--live {
  background: var(--c-lime);
  color: var(--c-ink);
}

.tag--wine { background: var(--c-wine); }

.tag--line {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--c-stone);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font-family: var(--font-cond);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  background: var(--c-board);
  color: var(--c-mist);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.btn--primary {
  background: var(--c-red);
  color: var(--c-mist);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--c-lime);
  color: var(--c-ink);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--c-mist);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

/* ---------- 7. 图片容器基础规则 ---------- */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(155deg, var(--c-board) 0%, var(--c-ink) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    115deg,
    rgba(200, 255, 61, 0.07) 0 2px,
    transparent 2px 28px
  );
}

.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-caption {
  margin: 0.6rem 0 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-stone);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  padding-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--c-stone);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0;
  list-style: none;
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin: 0 0.55rem;
  color: rgba(169, 183, 174, 0.5);
}

.breadcrumb a {
  color: var(--c-stone);
  text-decoration: none;
  transition: color 0.18s ease;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--c-lime); }

.breadcrumb [aria-current="page"] { color: var(--c-mist); }

/* ---------- 9. 长文正文 ---------- */
.prose {
  max-width: 74ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-family: var(--font-serif);
  line-height: 1.34;
  letter-spacing: 0.01em;
}

.prose h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  margin-top: 2em;
}

.prose h3 {
  font-size: 1.12rem;
  margin-top: 1.7em;
}

.prose a {
  color: var(--c-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul,
.prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.4em; }

.prose blockquote {
  margin: 1.6em 0;
  padding: 0.9rem 1.2rem;
  background: rgba(20, 61, 50, 0.7);
  border-left: 3px solid var(--c-red);
  color: var(--c-mist);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: rgba(43, 42, 94, 0.6);
  padding: 0.1em 0.35em;
}

/* ---------- 10. 页头 ---------- */
.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 200;
  padding: 0.55rem 1rem;
  font-family: var(--font-cond);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-ink);
  background: var(--c-lime);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--c-green);
  color: var(--c-mist);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: repeating-linear-gradient(
      115deg,
      var(--c-red) 0 14px,
      transparent 14px 30px
    ),
    var(--c-green);
}

.site-header::after {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--c-red) 0 22%,
    var(--c-wine) 22% 52%,
    var(--c-indigo) 52% 100%
  );
}

.site-header[data-scrolled] {
  box-shadow: 0 18px 34px -26px rgba(0, 0, 0, 0.95);
  background: var(--c-green);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 6;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-red), var(--c-lime));
  pointer-events: none;
}

.header-frame {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  width: 100%;
  max-width: var(--w-max);
  min-height: var(--header-h);
  margin-inline: auto;
  padding: 0.6rem var(--pad-x);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  position: relative;
  display: block;
  flex: none;
  width: 38px;
  height: 38px;
  background: linear-gradient(150deg, var(--c-board), var(--c-ink));
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 11px;
  width: 16px;
  height: 16px;
  background: var(--c-lime);
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.brand-name {
  display: block;
  font-family: var(--font-cond);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.1;
  transition: color 0.18s ease;
}

.brand-sub {
  display: block;
  font-size: 0.66rem;
  line-height: 1.5;
  letter-spacing: 0.16em;
  color: var(--c-stone);
}

.brand:hover .brand-name,
.brand:focus-visible .brand-name { color: var(--c-lime); }

/* 导航 */
.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.35rem, 1.2vw, 1.05rem);
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.2rem;
  font-family: var(--font-cond);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--c-stone);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-mist);
  border-bottom-color: var(--line-strong);
}

.nav-link[aria-current="page"] {
  color: var(--c-lime);
  border-bottom-color: var(--c-red);
}

.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  width: 5px;
  height: 5px;
  background: var(--c-red);
  transform: translateX(-50%) rotate(45deg);
}

/* 右收口按钮 */
.header-cta {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.58rem 1rem;
  font-family: var(--font-cond);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  color: var(--c-ink);
  background: var(--c-lime);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  background: var(--c-red);
  color: var(--c-mist);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.48rem 0.7rem;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--c-mist);
  font-family: var(--font-cond);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  line-height: 1;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  flex: none;
  width: 18px;
  height: 2px;
  background: var(--c-lime);
  transition: background-color 0.18s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--c-lime);
  transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  background: var(--c-ink);
  color: var(--c-mist);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--c-wine) 0 30%,
    var(--c-indigo) 30% 68%,
    var(--c-board) 68% 100%
  );
}

.footer-frame {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: clamp(2rem, 4vw, 3.25rem) var(--pad-x) clamp(1.75rem, 3vw, 2.5rem);
}

.footer-brand .brand { align-items: flex-start; }

.footer-tagline {
  max-width: 24ch;
  margin-top: 0.95rem;
  font-family: var(--font-serif);
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--c-stone);
}

.footer-rule {
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 1.1rem;
  background: linear-gradient(90deg, var(--c-red) 0 58%, var(--c-lime) 58% 100%);
}

.footer-col-title {
  margin-bottom: 0.9rem;
  font-family: var(--font-cond);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--c-gold);
}

.footer-links {
  display: grid;
  gap: 0.55rem;
  list-style: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.94rem;
  color: var(--c-stone);
  text-decoration: none;
  transition: color 0.18s ease;
}

.footer-link::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--c-board);
  border: 1px solid var(--line-strong);
  transform: rotate(45deg);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.footer-link:hover,
.footer-link:focus-visible { color: var(--c-mist); }

.footer-link:hover::before,
.footer-link:focus-visible::before {
  background: var(--c-lime);
  border-color: var(--c-lime);
}

.footer-contact {
  padding-left: clamp(0rem, 1.5vw, 1.25rem);
  border-left: 1px solid var(--line);
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.6rem;
  margin-bottom: 0.55rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--c-stone);
}

.contact-k {
  flex: none;
  min-width: 3.1em;
  font-family: var(--font-cond);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.contact-v { word-break: break-word; }

.contact-note {
  margin-top: 0.85rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line-strong);
  font-size: 0.82rem;
  color: var(--c-gold);
}

.footer-legal {
  border-top: 1px solid rgba(217, 178, 106, 0.34);
  background: var(--c-green);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.75rem;
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 1rem var(--pad-x) 1.4rem;
  font-size: 0.8rem;
  color: var(--c-stone);
}

.footer-legal-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1.25rem;
}

.footer-icp {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--c-gold);
}

.footer-copy { color: var(--c-stone); }

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.15rem;
  list-style: none;
}

.legal-link {
  color: var(--c-stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.legal-link:hover,
.legal-link:focus-visible {
  color: var(--c-mist);
  border-bottom-color: var(--c-gold);
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-frame {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand,
  .footer-contact { grid-column: 1 / -1; }

  .footer-contact {
    padding-left: 0;
    padding-top: 1.1rem;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .footer-tagline { max-width: 40ch; }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background: var(--c-green);
    border-top: 1px solid var(--line);
    border-bottom: 2px solid var(--c-red);
    box-shadow: var(--shadow-deep);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.28s ease, visibility 0.28s ease;
  }

  .site-nav[data-open] {
    max-height: min(72vh, 560px);
    overflow-y: auto;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.35rem var(--pad-x) 1rem;
  }

  .nav-item { border-bottom: 1px solid var(--line); }
  .nav-item:last-child { border-bottom: 0; }

  .nav-link {
    display: flex;
    width: 100%;
    padding: 0.85rem 0.2rem;
    font-size: 1.05rem;
    border-bottom: 0;
  }

  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left: 3px solid var(--c-red);
    padding-left: 0.85rem;
  }

  .nav-link[aria-current="page"]::before { display: none; }

  .brand-sub { display: none; }
  .brand-mark { width: 34px; height: 34px; }
  .brand-mark::before { left: 9px; top: 9px; width: 15px; height: 15px; }
}

@media (max-width: 720px) {
  .header-cta { display: none; }

  .grid--2,
  .grid--3,
  .grid--mirror { grid-template-columns: minmax(0, 1fr); }

  .footer-frame { grid-template-columns: minmax(0, 1fr); }

  .footer-brand,
  .footer-contact { grid-column: auto; }

  .footer-legal-inner { flex-direction: column; align-items: flex-start; }

  .section-head { align-items: flex-start; }
}

@media (max-width: 420px) {
  .brand-name { font-size: 1rem; }
  .nav-toggle-label { display: none; }
  .prose { font-size: 0.98rem; }
}

/* ---------- 13. 动效可访问性 ---------- */
@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;
  }
}