/* ==========================================================================
   球友会品牌 · 共享样式 /assets/site.css
   高原球场的热烈 × 数字工具的利落
   ========================================================================== */

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

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

:root {
  --clay: #C1442E;
  --clay-deep: #8E2F1F;
  --green: #1F8A5B;
  --green-deep: #14603F;
  --ink: #16171A;
  --lime: #F4F1EA;
  --orange: #FF7A1A;
  --whistle: #F2C230;
  --cyan: #2BD9C0;
  --grey: #6E7379;

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

  --wrap: 1200px;
  --line: 3px solid var(--ink);
  --shadow-hard: 6px 6px 0 var(--ink);
  --shadow-soft: 4px 4px 0 var(--ink);
}

body {
  margin: 0;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

body.nav-open { overflow: hidden; }

img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, h5 { margin: 0; font-weight: 900; line-height: 1.12; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
hr { border: 0; border-top: 3px solid var(--ink); margin: 40px 0; }

:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }
::selection { background: var(--orange); color: var(--ink); }

/* ---------- 通用容器 ---------- */
.wrap { width: min(100% - 40px, var(--wrap)); margin-inline: auto; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 120;
  padding: 12px 18px;
  background: var(--ink);
  color: var(--lime);
  font-weight: 800;
  font-size: .9rem;
  transition: top .18s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- 刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--lime);
  border-bottom: 3px solid var(--ink);
}

.progress-bar {
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-areas:
    "top   top  top"
    "brand brand brand"
    "nav   nav  nav";
  align-items: center;
  gap: 8px 24px;
  padding: 22px 0 16px;
  transition: padding .2s ease;
}

.masthead__top {
  grid-area: top;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
}

.masthead__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--grey);
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.masthead__cta { font-size: .9rem; padding: 10px 18px; }

.masthead__brand {
  grid-area: brand;
  display: block;
  text-align: center;
  padding: 2px 0 4px;
}

.masthead__brand-cn {
  display: block;
  font-size: clamp(2.5rem, 7.5vw, 4.6rem);
  font-weight: 900;
  line-height: .98;
  letter-spacing: .02em;
}

.masthead__brand-sub {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .42em;
  color: var(--clay);
}

/* ---------- 主导航 ---------- */
.nav-primary { grid-area: nav; }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px 6px;
}

.nav-list__item { position: relative; }

.nav-list__link {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .02em;
  transition: background-color .16s ease, color .16s ease;
}

.nav-list__link:hover,
.nav-list__link:focus-visible { background: var(--ink); color: var(--lime); }

.nav-list__link[aria-current="page"] { color: var(--clay); }

.nav-list__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 5px;
  background: var(--clay);
}

.nav-list__link[aria-current="page"]:hover { color: var(--lime); }
.nav-list__link[aria-current="page"]:hover::after { background: var(--orange); }

/* ---------- 移动目录按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 9px 14px;
  border: 3px solid var(--ink);
  background: var(--ink);
  color: var(--lime);
  font-weight: 800;
  font-size: .85rem;
  letter-spacing: .08em;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}

.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color .16s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .18s ease, top .18s ease;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] { background: var(--clay); border-color: var(--clay); }
.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); }

/* ---------- 刊头收缩态 ---------- */
.site-header[data-compact] .masthead {
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "brand nav top";
  gap: 10px 22px;
  padding: 9px 0;
}

.site-header[data-compact] .masthead__kicker { display: none; }
.site-header[data-compact] .masthead__brand { text-align: left; padding: 0; }

.site-header[data-compact] .masthead__brand-cn {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .12em;
}
.site-header[data-compact] .masthead__brand-sub { display: none; }
.site-header[data-compact] .masthead__actions { justify-content: flex-end; }
.site-header[data-compact] .nav-list { justify-content: center; gap: 0 2px; }
.site-header[data-compact] .nav-list__link {
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: 6px 9px;
}
.site-header[data-compact] .nav-list__link[aria-current="page"]::after {
  left: 6px;
  right: 6px;
  bottom: 0;
  height: 3px;
}
.site-header[data-compact] .masthead__cta {
  padding: 7px 13px;
  font-size: .78rem;
  box-shadow: var(--shadow-soft);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 22px;
  border: 3px solid var(--ink);
  background: var(--lime);
  color: var(--ink);
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: .02em;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease, color .16s ease;
}

.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }

.btn--accent { background: var(--orange); color: var(--ink); }
.btn--green { background: var(--green); color: var(--lime); }
.btn--green:hover { background: var(--green-deep); }
.btn--ghost { background: transparent; box-shadow: none; }
.btn--ghost:hover { background: var(--ink); color: var(--lime); box-shadow: var(--shadow-soft); }

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 0;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--grey);
}

.breadcrumbs__item { display: inline-flex; align-items: center; }
.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin: 0 10px;
  color: var(--clay);
  font-weight: 700;
}
.breadcrumbs__item a { border-bottom: 2px solid transparent; }
.breadcrumbs__item a:hover { color: var(--clay); border-bottom-color: var(--clay); }

/* ---------- 正文与标题 ---------- */
.prose { max-width: 70ch; font-size: 1rem; line-height: 1.75; }
.prose h2 { font-size: 1.6rem; margin: 40px 0 14px; }
.prose h3 { font-size: 1.2rem; margin: 28px 0 10px; }
.prose ul { list-style: none; margin: 0 0 1em; padding: 0; }
.prose ul li { position: relative; padding-left: 20px; margin-bottom: 8px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 10px;
  background: var(--clay);
}
.prose a { border-bottom: 2px solid var(--clay); }
.prose a:hover { background: var(--clay); color: var(--lime); }

.display {
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 5.4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.display--alt { color: var(--clay); }

/* ---------- 标签与展签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  background: var(--lime);
}
.tag--clay { background: var(--clay); color: var(--lime); border-color: var(--clay-deep); }
.tag--green { background: var(--green); color: var(--lime); border-color: var(--green-deep); }
.tag--orange { background: var(--orange); color: var(--ink); }

.specimen-tag {
  position: absolute;
  top: -3px;
  left: -3px;
  padding: 6px 11px;
  background: var(--ink);
  color: var(--lime);
  border: 3px solid var(--ink);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .14em;
}
.specimen-tag--clay { background: var(--clay); border-color: var(--clay-deep); }
.specimen-tag--green { background: var(--green); border-color: var(--green-deep); }
.specimen-tag--orange { background: var(--orange); color: var(--ink); border-color: var(--ink); }

.annotation {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--grey);
}
.annotation--rotate {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .26em;
}

/* ---------- 卡片与栅格 ---------- */
.card {
  position: relative;
  padding: 32px 22px 22px;
  border: 3px solid var(--ink);
  background: var(--lime);
  box-shadow: var(--shadow-hard);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translate(-4px, -4px); box-shadow: 9px 9px 0 var(--ink); }
.card--ink { background: var(--ink); color: var(--lime); }
.card--clay { background: var(--clay); color: var(--lime); border-color: var(--clay-deep); }
.card--green { background: var(--green); color: var(--lime); border-color: var(--green-deep); }
.card__title { font-size: 1.35rem; margin-bottom: 8px; }
.card__meta { font-family: var(--font-mono); font-size: .76rem; letter-spacing: .1em; opacity: .8; }

.grid-2 { display: grid; gap: 22px; grid-template-columns: 1fr; align-items: start; }
.grid-3 { display: grid; gap: 22px; grid-template-columns: 1fr; align-items: start; }

/* ---------- 横向主题带 ---------- */
.band {
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
  padding: 20px 0;
  background: var(--lime);
}
.band--dark { background: var(--ink); color: var(--lime); border-color: var(--ink); }
.band--clay { background: var(--clay); color: var(--lime); border-color: var(--clay-deep); }
.band--green { background: var(--green); color: var(--lime); border-color: var(--green-deep); }

.band-scroller {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 6px 0 12px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.band-scroller > * { flex: 0 0 auto; scroll-snap-align: start; }

/* ---------- 斜切色块 ---------- */
.slice { position: relative; padding: 56px 0; clip-path: polygon(0 10%, 100% 0, 100% 100%, 0 100%); }
.slice--clay { background: var(--clay); color: var(--lime); }
.slice--green { background: var(--green); color: var(--lime); }
.slice--ink { background: var(--ink); color: var(--lime); }

/* ---------- 媒体容器（页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 3px solid var(--ink);
  background: var(--ink);
  aspect-ratio: 4 / 3;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame > img { width: 100%; height: 100%; object-fit: cover; }
.media-frame__tag {
  position: absolute;
  left: -3px;
  bottom: -3px;
  padding: 6px 11px;
  background: var(--lime);
  color: var(--ink);
  border: 3px solid var(--ink);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
}
.media-note {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--grey);
}

/* ---------- 时间轴 ---------- */
.timeline {
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 3px solid var(--ink);
}
.timeline__item { position: relative; padding: 0 0 28px 20px; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--lime);
  border: 3px solid var(--ink);
}
.timeline__item[data-active]::before { background: var(--whistle); }

/* ---------- 三步切换 ---------- */
.steps { display: grid; gap: 16px; grid-template-columns: 1fr; }
.step {
  display: block;
  width: 100%;
  padding: 20px;
  text-align: left;
  border: 3px solid var(--ink);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, box-shadow .18s ease;
}
.step[aria-pressed="true"] {
  background: var(--ink);
  color: var(--lime);
  box-shadow: 6px 6px 0 var(--clay);
}
.step__index {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  margin-bottom: 8px;
  color: var(--clay);
}
.step[aria-pressed="true"] .step__index { color: var(--whistle); }

/* ---------- 筛选 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; }
.filter-btn {
  min-height: 40px;
  padding: 8px 15px;
  border: 3px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-weight: 800;
  font-size: .85rem;
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.filter-btn:hover { border-color: var(--clay); color: var(--clay); }
.filter-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--cyan);
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--cyan);
}
.filter-btn[aria-pressed="true"]:hover { color: var(--cyan); }

[data-filter-item][data-hidden] { display: none; }
[data-filter-item][data-enter] { animation: item-in .24s ease both; }

@keyframes item-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 80px;
  background: var(--ink);
  color: var(--lime);
}

.footer-band {
  height: 46px;
  background: var(--clay);
  clip-path: polygon(0 62%, 100% 0, 100% 100%, 0 100%);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding: 40px 0 32px;
  border-bottom: 2px solid rgba(244, 241, 234, .18);
}

.footer-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--whistle);
}

.footer-list li + li { margin-top: 10px; }

.footer-link {
  display: inline-block;
  font-size: .95rem;
  font-weight: 700;
  border-bottom: 2px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.footer-link:hover { color: var(--orange); border-bottom-color: var(--orange); }

.footer-contact li + li { margin-top: 18px; }

.footer-contact__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
}

.footer-label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: rgba(244, 241, 234, .55);
}

.footer-value { font-size: .95rem; }

.copy-chip {
  min-height: 40px;
  padding: 8px 13px;
  border: 2px solid rgba(244, 241, 234, .35);
  background: transparent;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: .88rem;
  cursor: pointer;
  transition: border-color .16s ease, color .16s ease;
}
.copy-chip:hover { border-color: var(--orange); color: var(--orange); }
.copy-chip[data-copied="true"] { border-color: var(--cyan); color: var(--cyan); }

.footer-note {
  margin-top: 20px;
  font-size: .84rem;
  line-height: 1.65;
  color: rgba(244, 241, 234, .62);
}

.footer-icp {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: .82rem;
  color: rgba(244, 241, 234, .78);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding: 18px 0 28px;
  font-size: .78rem;
  color: rgba(244, 241, 234, .55);
}
.footer-copy { margin: 0; }
.footer-mono { margin: 0; font-family: var(--font-mono); letter-spacing: .18em; }

/* ---------- 平板 / 桌面 ---------- */
@media (min-width: 720px) {
  .grid-2 { grid-template-columns: 1.15fr .85fr; gap: 26px; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 44px; }
}

@media (min-width: 1000px) {
  .footer-grid { grid-template-columns: 1fr 1.3fr 1fr; }
}

@media (max-width: 1100px) and (min-width: 901px) {
  .masthead__brand-cn { font-size: 3.3rem; }
  .nav-list__link { font-size: .86rem; padding: 8px 10px; }
}

/* ---------- 移动端 ---------- */
@media (max-width: 900px) {
  .masthead {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "top";
    gap: 12px;
    padding: 16px 0 14px;
  }

  .masthead__kicker { display: none; }
  .masthead__actions { width: 100%; margin-left: 0; justify-content: space-between; }
  .masthead__brand-cn { font-size: clamp(2.2rem, 11vw, 3.2rem); }
  .masthead__brand-sub { letter-spacing: .3em; font-size: .62rem; }

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

  .nav-primary {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 150px 24px 48px;
    background: var(--ink);
    color: var(--lime);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    overflow-y: auto;
    transition: opacity .22s ease, transform .22s ease, visibility .22s linear;
  }

  .nav-primary[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
    width: min(100%, 460px);
    gap: 0;
  }

  .nav-list__item { border-bottom: 2px solid rgba(244, 241, 234, .16); }
  .nav-list__item:first-child { border-top: 2px solid rgba(244, 241, 234, .16); }

  .nav-list__link {
    display: block;
    width: 100%;
    padding: 17px 6px;
    font-size: 1.42rem;
    font-weight: 900;
    color: var(--lime);
  }

  .nav-list__link:hover,
  .nav-list__link:focus-visible { background: var(--clay); color: var(--lime); }

  .nav-list__link[aria-current="page"] { color: var(--whistle); }
  .nav-list__link[aria-current="page"]::after {
    left: 6px;
    right: auto;
    width: 46px;
    bottom: 13px;
    height: 5px;
    background: var(--clay);
  }

  .site-header[data-compact] .masthead {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "top";
    gap: 10px;
    padding: 12px 0;
  }
  .site-header[data-compact] .masthead__brand { text-align: center; }
  .site-header[data-compact] .masthead__brand-cn {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 10vw, 3rem);
    font-weight: 900;
    letter-spacing: .02em;
  }
  .site-header[data-compact] .masthead__brand-sub { display: block; }

  .slice { clip-path: polygon(0 5%, 100% 0, 100% 100%, 0 100%); }
}

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

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

  .btn:hover,
  .card:hover { transform: none; }
  .nav-primary { transform: none !important; }
  .band-scroller { scroll-snap-type: none; }
}