/* ===========================================================
   开运体育 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   =========================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 7rem;
}

body {
  margin: 0;
  background-color: var(--ink-900);
  color: var(--body-ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure, blockquote { margin: 0; }
table { border-collapse: collapse; }
summary { cursor: pointer; }

/* ---------- 2. 设计变量 ---------- */
:root {
  color-scheme: dark;

  --ink-900: #061A14;
  --ink-800: #0B2A20;
  --ink-700: #123A2C;
  --line-green: #1C5140;
  --signal: #C6FF3D;
  --glow: #E4FF9E;
  --amber: #FF7A2F;
  --gold: #C8A24A;
  --chalk: #F2F6EE;
  --chalk-dim: #A9B8AE;
  --charcoal: #0F231D;
  --body-ink: #D3E0D6;

  --shell: 1240px;
  --pad: clamp(1rem, 4vw, 2.5rem);
  --cut: 16px;

  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 中文排版基线 ---------- */
h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.16;
  color: var(--chalk);
}

h1 { font-size: clamp(2rem, 5.4vw, 3.4rem); }
h2 { font-size: clamp(1.35rem, 3vw, 2rem); }
h3 { font-size: clamp(1.08rem, 2vw, 1.35rem); }

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: .6rem;
}

.lede {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.9;
  color: var(--chalk-dim);
  max-width: 46ch;
}

.hl {
  background-image: linear-gradient(to top, rgba(198, 255, 61, .62) 0 3px, transparent 3px);
  background-repeat: no-repeat;
  background-position: 0 100%;
  color: var(--chalk);
}

.num,
.mono,
[data-count] {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

/* ---------- 4. 布局外壳 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: clamp(2rem, 5vw, 3.75rem); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem 1.25rem;
  padding-bottom: .9rem;
  margin-bottom: clamp(1.1rem, 2.5vw, 1.9rem);
  border-bottom: 1px solid var(--line-green);
}

.section__title { font-size: clamp(1.25rem, 2.6vw, 1.85rem); }

.section__note {
  margin-left: auto;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--chalk-dim);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--sidebar { grid-template-columns: minmax(200px, 268px) minmax(0, 1fr); }

.prose {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--body-ink);
}
.prose p + p { margin-top: 1.05em; }

.slant-rule {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--line-green) 12%, var(--line-green) 88%, transparent);
  transform: rotate(-.3deg);
  transform-origin: left center;
  margin-block: clamp(1.5rem, 4vw, 3rem);
}

/* ---------- 5. 跳转链接与焦点 ---------- */
.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 200;
  padding: .6rem 1rem;
  background: var(--signal);
  color: var(--ink-900);
  font-weight: 800;
  font-size: .88rem;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: top .18s ease;
}
.skip-link:focus { top: 1rem; }

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

/* ---------- 6. 头部：双层信息结构 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--ink-900);
  border-bottom: 1px solid var(--line-green);
}

/* 6.1 品牌署名带 */
.masthead__top { background-color: var(--ink-900); }

.masthead__topInner {
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.5rem);
  min-height: 66px;
}

.brandmark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .1rem;
  text-decoration: none;
  min-width: 0;
}

.brandmark__cn {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(1.18rem, 2.7vw, 1.55rem);
  letter-spacing: -.03em;
  color: var(--chalk);
  line-height: 1.1;
  padding-left: .7rem;
  border-left: 4px solid var(--signal);
}

.brandmark__claim {
  font-family: var(--serif);
  font-weight: 600;
  font-size: .74rem;
  letter-spacing: .01em;
  color: var(--chalk-dim);
  padding-left: .7rem;
}

.masthead__side {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 2vw, 1rem);
}

.masthead__meta {
  display: flex;
  align-items: center;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--chalk-dim);
  white-space: nowrap;
}

.masthead__pulse {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: .45rem;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(198, 255, 61, .14);
  animation: yk-pulse 2.6s ease-in-out infinite;
}

@keyframes yk-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}

/* 6.2 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .5rem .75rem;
  background: var(--ink-800);
  border: 1px solid var(--line-green);
  color: var(--chalk);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .04em;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color .18s ease, color .18s ease;
}
.nav-toggle:hover { background: var(--signal); color: var(--ink-900); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle__label { line-height: 1; }

/* 6.3 常用栏带 */
.utilbar {
  background-color: var(--ink-800);
  border-top: 1px solid var(--line-green);
  border-bottom: 1px solid var(--line-green);
}

.utilbar__inner {
  display: flex;
  align-items: center;
  gap: .8rem;
  min-height: 48px;
}

.utilbar__tag {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--gold);
  white-space: nowrap;
  padding-right: .8rem;
  border-right: 1px solid var(--line-green);
}

.utilbar__list {
  display: flex;
  align-items: center;
  gap: .3rem;
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.utilbar__list::-webkit-scrollbar { display: none; }

.utilbar__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .38rem .7rem;
  white-space: nowrap;
  color: var(--chalk-dim);
  font-size: .86rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 2px;
  transition: color .18s ease, background-color .18s ease;
}
.utilbar__link:hover,
.utilbar__link:focus-visible {
  color: var(--ink-900);
  background-color: var(--signal);
}

.utilbar__num {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--gold);
}
.utilbar__link:hover .utilbar__num { color: var(--ink-900); }

/* 6.4 主要栏目导航 */
.mainnav { background-color: var(--ink-900); }

.mainnav__inner {
  display: flex;
  align-items: center;
  min-height: 52px;
}

.mainnav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .1rem;
}

.mainnav__link {
  position: relative;
  display: inline-block;
  padding: .6rem .85rem;
  color: var(--chalk);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .01em;
  text-decoration: none;
  transition: color .18s ease;
}

.mainnav__link::after {
  content: "";
  position: absolute;
  left: .85rem;
  right: .85rem;
  bottom: .32rem;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s ease;
}

.mainnav__link:hover { color: var(--signal); }
.mainnav__link:hover::after { transform: scaleX(1); }

.mainnav__link[aria-current="page"] { color: var(--signal); }
.mainnav__link[aria-current="page"]::after { transform: scaleX(1); }

/* ---------- 7. 页脚 ---------- */
.sitefoot {
  margin-top: clamp(3rem, 8vw, 6rem);
  background-color: var(--ink-900);
  border-top: 1px solid var(--line-green);
}

.sitefoot__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(1.25rem, 3vw, 2rem);
}

.sitefoot__col { min-width: 0; }

.sitefoot__brand {
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: -.02em;
  color: var(--chalk);
  padding-left: .7rem;
  border-left: 4px solid var(--signal);
  line-height: 1.2;
}

.sitefoot__note {
  margin-top: .85rem;
  font-size: .85rem;
  line-height: 1.8;
  color: var(--chalk-dim);
  max-width: 34ch;
}

.sitefoot__mark {
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.sitefoot__title {
  font-size: .78rem;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: .9rem;
}

.sitefoot__list { display: grid; gap: .45rem; }

.sitefoot__list a {
  display: inline-block;
  font-size: .88rem;
  color: var(--chalk-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.sitefoot__list a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.sitefoot__list--legal {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--line-green);
}

.sitefoot__contact { display: grid; gap: .9rem; }

.sitefoot__label {
  display: block;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--chalk-dim);
}

.sitefoot__value {
  display: inline;
  font-size: .88rem;
  color: var(--chalk);
  word-break: break-word;
}

.copybtn {
  display: inline-flex;
  align-items: center;
  margin-left: .45rem;
  padding: .12rem .45rem;
  background: transparent;
  border: 1px solid var(--line-green);
  color: var(--chalk-dim);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
  cursor: pointer;
  border-radius: 2px;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}
.copybtn:hover {
  color: var(--ink-900);
  background-color: var(--signal);
  border-color: var(--signal);
}
.copybtn.is-copied {
  color: var(--ink-900);
  background-color: var(--amber);
  border-color: var(--amber);
}

.sitefoot__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  padding-block: 1rem 1.75rem;
  border-top: 1px solid var(--line-green);
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--chalk-dim);
}

.sitefoot__legal { margin: 0; }
.sitefoot__legal--soft {
  font-family: var(--sans);
  letter-spacing: .01em;
  flex: 1 1 22ch;
  min-width: 18ch;
}

/* ---------- 8. 基础组件 ---------- */
/* 8.1 切角面板 */
.panel {
  position: relative;
  padding: clamp(1.1rem, 2.2vw, 1.75rem);
  background-color: var(--ink-700);
  box-shadow: inset 0 0 0 1px var(--line-green);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: background-color .18s ease, transform .18s ease;
}
.panel:hover {
  background-color: #164434;
  transform: translateY(-2px);
}

.panel__title {
  font-size: 1.1rem;
  margin-bottom: .35rem;
}

.panel__meta {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--chalk-dim);
  margin-bottom: .7rem;
}

.panel__body {
  font-size: .92rem;
  line-height: 1.8;
  color: var(--body-ink);
}

/* 8.2 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .18rem .5rem;
  border: 1px solid var(--line-green);
  color: var(--chalk-dim);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--signal { color: var(--signal); border-color: rgba(198, 255, 61, .5); }
.tag--amber { color: var(--amber); border-color: rgba(255, 122, 47, .5); }
.tag--gold { color: var(--gold); border-color: rgba(200, 162, 74, .5); }

/* 8.3 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.2rem;
  border: 1px solid var(--line-green);
  background-color: var(--ink-800);
  color: var(--chalk);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background-color .18s ease, color .18s ease, transform .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-2px); border-color: var(--signal); }

.btn--primary {
  background-color: var(--signal);
  border-color: var(--signal);
  color: var(--ink-900);
}
.btn--primary:hover { background-color: var(--glow); border-color: var(--glow); }

.btn--ghost { background-color: transparent; }
.btn--ghost:hover { color: var(--signal); border-color: var(--signal); }

.btn--block { display: flex; width: 100%; }

/* 8.4 面包屑 */
.breadcrumb { font-size: .8rem; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
}

.breadcrumb__item { color: var(--chalk-dim); }

.breadcrumb__item a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.breadcrumb__item a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.breadcrumb__sep { color: var(--line-green); }

/* 8.5 响应式图像容器 */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--charcoal);
  --cut: 20px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.media-frame__media {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.media-frame__media > svg,
.media-frame__media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: .7rem .85rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--chalk-dim);
  background-image: linear-gradient(0deg, rgba(6, 26, 20, .94), rgba(6, 26, 20, 0));
}

/* 8.6 数据带 */
.statline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  background-color: var(--line-green);
  border: 1px solid var(--line-green);
}

.stat {
  padding: 1rem 1.1rem;
  background-color: var(--ink-800);
}

.stat__num {
  display: block;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.1;
  color: var(--signal);
  text-align: right;
}

.stat__label {
  display: block;
  margin-top: .35rem;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--chalk-dim);
  text-align: right;
}

/* 8.7 编号索引列表 */
.indexlist { display: grid; gap: 1px; background-color: var(--line-green); }

.indexlist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .9rem;
  padding: .85rem 1rem;
  background-color: var(--ink-800);
  color: inherit;
  text-decoration: none;
  transition: background-color .18s ease;
}
.indexlist__item:hover { background-color: var(--ink-700); }

.indexlist__num {
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.indexlist__label {
  font-weight: 700;
  font-size: .96rem;
  color: var(--chalk);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.indexlist__meta {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--chalk-dim);
  text-align: right;
  white-space: nowrap;
}

/* ---------- 9. 由 JS 注入的界面 ---------- */
.scroll-rail {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 90;
  pointer-events: none;
  background-color: transparent;
}

.scroll-rail__bar {
  height: 100%;
  width: 0;
  background-image: linear-gradient(90deg, var(--signal), var(--glow));
  transition: width .1s linear;
}

.backtop {
  position: fixed;
  right: clamp(.75rem, 3vw, 1.5rem);
  bottom: clamp(.75rem, 3vw, 1.5rem);
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem .85rem;
  background-color: var(--ink-800);
  border: 1px solid var(--line-green);
  color: var(--signal);
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .08em;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, background-color .18s ease, color .18s ease;
}
.backtop[data-visible] {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.backtop:hover {
  background-color: var(--signal);
  color: var(--ink-900);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1080px) {
  .sitefoot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--sidebar { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 9rem; }

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

  .mainnav {
    display: none;
    border-top: 1px solid var(--line-green);
  }
  .masthead[data-open] .mainnav { display: block; }

  .mainnav__inner { min-height: 0; }

  .mainnav__list {
    flex-direction: column;
    align-items: stretch;
    padding-block: .35rem .6rem;
  }

  .mainnav__link {
    display: block;
    padding: .8rem .75rem;
    font-size: 1rem;
    border-bottom: 1px solid rgba(28, 81, 64, .7);
  }
  .mainnav__list > li:last-child .mainnav__link { border-bottom: none; }

  .mainnav__link::after { display: none; }

  .mainnav__link[aria-current="page"] {
    color: var(--signal);
    box-shadow: inset 3px 0 0 var(--signal);
  }

  .masthead__topInner { min-height: 58px; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .section__note { margin-left: 0; flex-basis: 100%; }

  .utilbar__tag { display: none; }
  .utilbar__inner { min-height: 44px; }

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

  .sitefoot__bar { font-size: .7rem; }

  .masthead__meta { display: none; }

  .indexlist__item {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .indexlist__meta { grid-column: 2; text-align: left; }
}

@media (max-width: 400px) {
  .brandmark__claim { display: none; }
}

/* ---------- 11. 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .masthead__pulse { animation: none; }
  .panel:hover,
  .btn:hover { transform: none; }
}