/* ========== 米博体育看台 · 共享样式 /assets/site.css ========== */

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

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

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

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

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

:root {
  /* 色彩 */
  --ink: #0E1B16;
  --ink-deep: #050806;
  --concrete: #C9C4B8;
  --chalk: #F2EFE7;
  --signal: #FF6B1A;
  --lemon: #E8FF4D;
  --steel: #2A2F2B;
  --moss: #5C7A63;
  --clay: #B85C3E;
  --mist: #8FA3A0;

  /* 线条层级 */
  --line: rgba(201, 196, 184, .18);
  --line-mid: rgba(201, 196, 184, .32);
  --line-strong: rgba(201, 196, 184, .55);

  /* 字体 */
  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  /* 尺度 */
  --wrap: 1320px;
  --gutter: clamp(16px, 4vw, 56px);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 基础排版 ---------- */
html, body { min-height: 100%; }

body {
  display: flex;
  flex-direction: column;
  background-color: var(--ink);
  background-image: linear-gradient(180deg, rgba(92, 122, 99, .12) 0, rgba(14, 27, 22, 0) 520px);
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .06em;
  color: var(--chalk);
}

p { font-size: inherit; }

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

button { font: inherit; color: inherit; }

strong { font-weight: 800; }

::selection { background: var(--signal); color: var(--ink-deep); }

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

/* ---------- 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.section { padding-block: clamp(48px, 6vw, 96px); }

.section__title {
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: .08em;
}

.section__lead {
  max-width: 62ch;
  margin-top: 14px;
  color: var(--concrete);
  font-size: 15px;
  line-height: 1.85;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--signal);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.panel {
  background: rgba(42, 47, 43, .34);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.breadcrumb__link { color: var(--concrete); transition: color .2s var(--ease); }
.breadcrumb__link:hover { color: var(--signal); }
.breadcrumb__sep { color: var(--mist); opacity: .6; }
.breadcrumb__current { color: var(--chalk); }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line-mid);
  border-radius: 0;
  background: transparent;
  color: var(--chalk);
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

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

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

.btn--primary:hover {
  background: var(--lemon);
  border-color: var(--lemon);
  color: var(--ink-deep);
}

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

.btn--ghost:hover { border-color: var(--lemon); color: var(--lemon); }

/* ---------- 数据与标签 ---------- */
.data-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 52px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lemon);
}

.data-num--signal { color: var(--signal); }
.data-num--chalk { color: var(--chalk); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--line-mid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--concrete);
  white-space: nowrap;
}

.tag--moss {
  border-color: rgba(92, 122, 99, .75);
  color: #A6C0AC;
}

/* ---------- 媒体容器（页面阶段放置图片或内联 SVG） ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--steel);
  background-image:
    linear-gradient(to right, rgba(201, 196, 184, .10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 196, 184, .10) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media > img,
.media > svg,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3  { aspect-ratio: 4 / 3; }
.media--1x1  { aspect-ratio: 1 / 1; }
.media--3x4  { aspect-ratio: 3 / 4; }

/* ---------- 左侧阶梯索引 ---------- */
.rail {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
}

.rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: -1px;
  padding: 10px 0 10px 14px;
  border-left: 2px solid transparent;
  color: var(--mist);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.rail__link:hover {
  color: var(--chalk);
  border-left-color: var(--line-strong);
}

.rail__link.is-active {
  color: var(--lemon);
  border-left-color: var(--signal);
  background-image: linear-gradient(90deg, rgba(255, 107, 26, .14), rgba(255, 107, 26, 0));
}

.rail__num { font-size: 10px; color: var(--concrete); }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--lemon);
  color: var(--ink-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  transition: top .18s var(--ease);
}

.skip-link:focus { top: 12px; }

/* ============================================================
   页头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--ink);
  background-image: linear-gradient(to right, rgba(201, 196, 184, .10) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
  color: var(--chalk);
  border-bottom: 1px solid var(--line-strong);
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(201, 196, 184, .14);
  z-index: 2;
}

.header-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--signal), var(--lemon));
  transition: width .1s linear;
}

.header-rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 7px var(--gutter);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.header-rail__coord { color: var(--concrete); white-space: nowrap; }

.header-rail__meta {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-rail__status {
  display: inline-flex;
  align-items: center;
  color: var(--signal);
  white-space: nowrap;
}

.header-rail__status::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--signal);
}

.header-main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 40px);
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(12px, 1.6vw, 18px) var(--gutter);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--chalk);
}

.brand__mark {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border: 1px solid var(--line-strong);
  background-image: linear-gradient(160deg, rgba(255, 107, 26, .22), rgba(255, 107, 26, 0));
}

.brand__mark::before {
  content: "";
  position: absolute;
  left: 6px;
  bottom: 6px;
  width: 14px;
  height: 14px;
  background: var(--signal);
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 6px;
  width: 6px;
  height: 6px;
  background: var(--lemon);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand__name {
  font-family: var(--font-head);
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .16em;
  color: var(--chalk);
}

.brand__tagline {
  font-size: 11px;
  line-height: 1.3;
  letter-spacing: .14em;
  color: var(--mist);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line-mid);
  border-radius: 0;
  background: transparent;
  color: var(--chalk);
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--signal); color: var(--signal); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

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

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 6px 0;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--concrete);
  transition: color .2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.site-nav__link:hover { color: var(--chalk); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--chalk);
  font-weight: 700;
}

.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--lemon);
  transform: translateY(-50%);
}

.site-nav__cta {
  flex: 0 0 auto;
  padding: 10px 16px;
  font-size: 12px;
  letter-spacing: .1em;
  white-space: nowrap;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: auto;
  padding-top: clamp(40px, 5vw, 72px);
  background-color: var(--ink-deep);
  background-image:
    linear-gradient(to right, rgba(201, 196, 184, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 196, 184, .05) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%, 100% 88px;
  color: var(--concrete);
  border-top: 1px solid var(--signal);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) repeat(3, minmax(0, 1fr)) minmax(0, 1.5fr);
  gap: clamp(24px, 3vw, 48px);
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0 var(--gutter) clamp(32px, 4vw, 56px);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--chalk);
}

.footer-brand__desc {
  max-width: 36ch;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--concrete);
}

.footer-brand__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.footer-col__title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--mist);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--concrete);
  transition: color .2s var(--ease);
}

.footer-col__link::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--signal);
  vertical-align: middle;
  transition: width .2s var(--ease), margin-right .2s var(--ease);
}

.footer-col__link:hover { color: var(--chalk); }
.footer-col__link:hover::before { width: 12px; margin-right: 8px; }

.footer-contact__list {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
}

.footer-contact__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  font-size: 13px;
  line-height: 1.65;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mist);
}

.footer-contact__value {
  color: var(--chalk);
  word-break: break-word;
}

.footer-contact__note {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mist);
}

.footer-base__copy { color: var(--concrete); }
.footer-base__icp { color: var(--concrete); }
.footer-base__note { color: var(--mist); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 90;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    padding: 8px var(--gutter) 24px;
    background-color: var(--ink);
    background-image: linear-gradient(to right, rgba(201, 196, 184, .10) 1px, transparent 1px);
    background-size: calc(100% / 6) 100%;
    border-bottom: 1px solid var(--signal);
  }

  .site-nav[data-open="true"] { display: flex; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item { border-bottom: 1px solid var(--line); }

  .site-nav__link {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 15px 0;
    font-size: 16px;
    letter-spacing: .14em;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"]::before {
    left: auto;
    right: 0;
    top: 50%;
  }

  .site-nav__cta {
    margin-top: 20px;
    padding: 14px 18px;
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

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

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 15px; }

  .header-rail { font-size: 10px; letter-spacing: .1em; }
  .header-rail__meta { display: none; }

  .brand__mark { width: 32px; height: 32px; }
  .brand__tagline { display: none; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-base { font-size: 10px; letter-spacing: .08em; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 减少动态偏好 / 打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .header-progress__bar { transition: none; }
}

@media print {
  .site-header { position: static; }
  .header-progress,
  .nav-toggle { display: none !important; }

  body {
    background: #fff;
    color: #050806;
  }

  .site-footer {
    background: #fff;
    color: #050806;
    border-top: 1px solid #050806;
  }
}