/* ==========================================================================
   28体育汇 · 共享样式 /assets/site.css
   框架式装订册 × 赛场数据板
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink-900: #0B1026;
  --ink-800: #111A3A;
  --paper-100: #F3EBDD;
  --paper-200: #E8DECB;
  --brown-900: #171410;
  --cyan-400: #19E3FF;
  --lime-400: #B6FF3B;
  --orange-500: #FF6B2C;
  --steel-500: #6C7A99;
  --white-000: #FFFFFF;
  --teal-700: #0E5F6B;

  --rail: 0px;
  --header-h: 68px;
  --dur: 190ms;
  --ease: cubic-bezier(0.22, 0.72, 0.2, 1);

  --line-soft: rgba(108, 122, 153, 0.24);
  --line-mid: rgba(108, 122, 153, 0.45);
  --line-ink: rgba(23, 20, 16, 0.18);

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

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  padding-inline: var(--rail);
  background: var(--ink-900);
  color: var(--brown-900);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote {
  margin: 0;
}

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

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

img, video {
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
}

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

[hidden] {
  display: none !important;
}

main {
  display: block;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

#main-content:focus {
  outline: none;
}

/* ---------- 3. 中文排版基础 ---------- */
h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1, "lnum" 1;
  letter-spacing: -0.01em;
}

/* ---------- 4. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.site-footer :focus-visible,
.on-ink :focus-visible {
  outline-color: var(--lime-400);
}

.on-ink :focus-visible {
  outline-color: var(--lime-400);
}

/* ---------- 5. 布局容器 ---------- */
.container {
  width: min(1440px, 100%);
  margin-inline: auto;
  padding-inline: clamp(16px, 3.2vw, 48px);
}

.container--narrow {
  width: min(920px, 100%);
}

.on-ink {
  background: var(--ink-900);
  color: var(--paper-100);
}

.on-ink a {
  color: var(--cyan-400);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  --btn-fg: var(--cyan-400);
  --btn-bd: rgba(25, 227, 255, 0.55);
  --btn-bg: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 15px;
  border: 1px solid var(--btn-bd);
  border-radius: 0;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn:hover {
  --btn-fg: var(--white-000);
  --btn-bd: var(--cyan-400);
  --btn-bg: rgba(25, 227, 255, 0.16);
}

.btn--solid {
  --btn-fg: var(--ink-900);
  --btn-bd: var(--cyan-400);
  --btn-bg: var(--cyan-400);
  font-weight: 800;
}

.btn--solid:hover {
  --btn-fg: var(--ink-900);
  --btn-bd: var(--lime-400);
  --btn-bg: var(--lime-400);
}

.btn--line {
  --btn-fg: var(--paper-100);
  --btn-bd: rgba(243, 235, 221, 0.34);
  --btn-bg: transparent;
}

.btn--line:hover {
  --btn-fg: var(--ink-900);
  --btn-bd: var(--lime-400);
  --btn-bg: var(--lime-400);
}

.btn--ghost {
  --btn-fg: var(--brown-900);
  --btn-bd: rgba(23, 20, 16, 0.4);
  --btn-bg: transparent;
}

.btn--ghost:hover {
  --btn-fg: var(--paper-100);
  --btn-bd: var(--ink-900);
  --btn-bg: var(--ink-900);
}

/* ---------- 7. 跳至主内容 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 300;
  padding: 12px 20px;
  background: var(--lime-400);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 12px;
  outline: 2px solid var(--ink-900);
  outline-offset: -4px;
}

/* ---------- 8. 框架式头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid rgba(25, 227, 255, 0.22);
}

.site-header::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--cyan-400) 0 22px,
    transparent 22px 54px
  );
  opacity: 0.6;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 28px);
  width: min(1480px, 100%);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: clamp(14px, 2.2vw, 28px);
}

/* 装订轨 */
.site-header__rail {
  display: none;
  position: fixed;
  top: 0;
  bottom: 0;
  width: var(--rail);
  background: var(--ink-900);
  z-index: 120;
  pointer-events: none;
}

.site-header__rail::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    rgba(25, 227, 255, 0.45) 0 1px,
    transparent 1px 56px
  );
  opacity: 0.55;
}

.site-header__rail--left {
  left: 0;
  border-right: 1px solid rgba(25, 227, 255, 0.18);
}

.site-header__rail--right {
  right: 0;
  border-left: 1px solid rgba(25, 227, 255, 0.18);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  text-decoration: none;
  flex: 0 0 auto;
}

.brand__num {
  padding-right: 10px;
  border-right: 1px solid rgba(25, 227, 255, 0.38);
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 1;
  color: var(--cyan-400);
}

.brand__stack {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand__name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--paper-100);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.22em;
  line-height: 1;
  color: var(--steel-500);
}

.brand:hover .brand__name {
  color: var(--cyan-400);
}

/* 主导航 */
.site-nav__list {
  display: flex;
  align-items: center;
}

.site-nav__item a {
  position: relative;
  display: block;
  padding: 12px 14px;
  color: rgba(243, 235, 221, 0.76);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.site-nav__item a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.site-nav__item a:hover {
  color: var(--white-000);
  background: rgba(25, 227, 255, 0.08);
}

.site-nav__item a:hover::after {
  transform: scaleX(1);
}

.site-nav__item a[aria-current="page"] {
  color: var(--white-000);
  font-weight: 800;
}

.site-nav__item a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--lime-400);
}

.site-nav__quick {
  display: none;
  gap: 10px;
  padding: 20px 4px 0;
  border-top: 1px solid var(--line-soft);
  margin-top: 8px;
}

/* 头部工具区 */
.site-header__tools {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.site-header__tools .btn--solid {
  display: none;
}

/* 移动开关 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 38px;
  padding: 0 13px;
  border: 1px solid rgba(25, 227, 255, 0.42);
  border-radius: 0;
  background: transparent;
  color: var(--paper-100);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  cursor: pointer;
  flex: 0 0 auto;
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan-400);
  background: rgba(25, 227, 255, 0.12);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan-400);
  transition: transform var(--dur) var(--ease);
}

.nav-toggle__bars::before {
  top: 0;
}

.nav-toggle__bars::after {
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-4px) rotate(-45deg);
}

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

/* 进度条 */
.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-400), var(--lime-400));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
  pointer-events: none;
}

/* 遮罩 */
.site-header__scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(11, 16, 38, 0.68);
  opacity: 0;
  visibility: hidden;
  transition: opacity 240ms var(--ease), visibility 0s linear 240ms;
}

.site-header__scrim[data-open] {
  opacity: 1;
  visibility: visible;
  transition: opacity 240ms var(--ease), visibility 0s;
}

/* ---------- 9. 移动抽屉（<960px） ---------- */
@media (max-width: 959px) {
  .site-header__scrim {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    z-index: 90;
    width: min(330px, 86vw);
    padding: 26px 22px 40px;
    overflow-y: auto;
    background: var(--ink-800);
    border-left: 1px solid rgba(25, 227, 255, 0.28);
    box-shadow: -18px 0 40px rgba(0, 0, 0, 0.34);
    transform: translateX(101%);
    visibility: hidden;
    transition: transform 240ms var(--ease), visibility 0s linear 240ms;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform 240ms var(--ease), visibility 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__item a {
    padding: 16px 4px;
    border-bottom: 1px solid var(--line-soft);
    font-size: 16px;
    letter-spacing: 0.02em;
  }

  .site-nav__item a::after {
    left: 4px;
    right: auto;
    width: 20px;
    bottom: 10px;
  }

  .site-nav__item a:hover {
    background: transparent;
    color: var(--cyan-400);
  }

  .site-nav__item a[aria-current="page"] {
    color: var(--cyan-400);
  }

  .site-nav__quick {
    display: flex;
    flex-wrap: wrap;
  }

  .site-nav__item {
    position: relative;
  }

  html.is-nav-open,
  html.is-nav-open body {
    overflow: hidden;
  }
}

/* ---------- 10. 桌面端导航展开 ---------- */
@media (min-width: 960px) {
  .site-header__rail {
    display: block;
  }

  :root {
    --rail: 18px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .site-header__tools {
    display: flex;
  }
}

@media (min-width: 1280px) {
  .site-header__tools .btn--solid {
    display: inline-flex;
  }
}

/* ---------- 11. 分区标题 ---------- */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-ink);
  color: var(--brown-900);
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange-500);
  flex: 0 0 auto;
}

.section-head__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 800;
}

.on-ink .section-head {
  border-bottom-color: var(--line-mid);
  color: var(--paper-100);
}

.on-ink .section-head__index {
  color: var(--lime-400);
}

/* ---------- 12. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.78;
}

.crumbs a {
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.crumbs a:hover {
  border-bottom-color: currentColor;
  color: var(--cyan-400);
  opacity: 1;
}

.crumbs__sep {
  opacity: 0.5;
}

.crumbs [aria-current="page"] {
  font-weight: 700;
  opacity: 1;
}

/* ---------- 13. 正文容器 ---------- */
.prose {
  max-width: 68ch;
}

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

.prose h2 {
  margin-top: 2.1em;
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
}

.prose h3 {
  margin-top: 1.7em;
  font-size: 1.14rem;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li + li {
  margin-top: 0.45em;
}

.prose a {
  color: var(--teal-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.on-ink .prose a {
  color: var(--cyan-400);
}

.prose strong {
  font-weight: 800;
}

.prose blockquote {
  padding-left: 1.1em;
  border-left: 3px solid var(--orange-500);
  color: var(--steel-500);
}

/* ---------- 14. 网格 ---------- */
.ui-grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 32px);
}

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

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

.ui-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ui-grid--sidebar {
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
}

@media (max-width: 1023px) {
  .ui-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 719px) {
  .ui-grid--2,
  .ui-grid--3,
  .ui-grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 15. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
}

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

.media--16x9 {
  aspect-ratio: 16 / 9;
}

.media--4x3 {
  aspect-ratio: 4 / 3;
}

.media--3x2 {
  aspect-ratio: 3 / 2;
}

.media--1x1 {
  aspect-ratio: 1 / 1;
}

.media__label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 5px 11px;
  background: var(--lime-400);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

/* ---------- 16. 标签与横向索引带 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  padding: 0 10px;
  border: 1px solid var(--line-mid);
  color: var(--steel-500);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease),
    color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

a.tag:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(25, 227, 255, 0.08);
}

.tag--accent {
  border-color: var(--orange-500);
  color: var(--orange-500);
}

.tag--data {
  border-color: rgba(182, 255, 59, 0.6);
  color: var(--lime-400);
}

.on-ink .tag {
  color: rgba(243, 235, 221, 0.8);
}

.hscroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 10px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-400) rgba(108, 122, 153, 0.22);
}

.hscroll > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.hscroll::-webkit-scrollbar {
  height: 5px;
}

.hscroll::-webkit-scrollbar-track {
  background: rgba(108, 122, 153, 0.22);
}

.hscroll::-webkit-scrollbar-thumb {
  background: var(--cyan-400);
}

/* ---------- 17. 页脚 ---------- */
.site-footer {
  background: var(--ink-900);
  color: var(--paper-100);
  border-top: 1px solid rgba(25, 227, 255, 0.2);
}

.site-footer__strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 12px clamp(16px, 3vw, 44px);
  background: var(--paper-100);
  color: var(--brown-900);
  border-bottom: 1px solid rgba(23, 20, 16, 0.18);
  font-size: 12.5px;
}

.site-footer__strip-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--orange-500);
}

.site-footer__strip-value {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-footer__strip-link {
  margin-left: auto;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--orange-500);
  font-weight: 700;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.site-footer__strip-link:hover {
  color: var(--orange-500);
  border-bottom-color: var(--ink-900);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.25fr 1fr;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
}

.footer-col {
  background: var(--ink-900);
  padding: clamp(26px, 3.4vw, 48px) clamp(18px, 2.4vw, 34px);
}

.footer-col--brand {
  background: var(--ink-800);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--steel-500);
}

.footer-brand {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper-100);
}

.footer-desc {
  margin-bottom: 12px;
  font-size: 14px;
  color: rgba(243, 235, 221, 0.82);
}

.footer-note {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--steel-500);
}

.footer-links {
  display: grid;
  gap: 9px;
}

.footer-links a,
.footer-links span {
  font-size: 14px;
  color: rgba(243, 235, 221, 0.88);
  overflow-wrap: anywhere;
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--cyan-400);
}

.footer-links--plain a,
.footer-links--plain span {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
}

.site-footer__baseline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 16px clamp(16px, 3vw, 44px);
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel-500);
}

@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .site-footer__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer__strip-link {
    margin-left: 0;
  }

  .site-footer__baseline {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 18. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .site-header__progress {
    transition: none !important;
  }
}