/* ============================================================
   宝威体育主站 · /assets/site.css
   共享外壳 + 通用版式 + 基础组件
   ============================================================ */

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

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

body { margin: 0; }

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

:root {
  --ink: #0A1F1A;
  --ink-deep: #101614;
  --surface: #16302A;
  --sand: #E7DEC8;
  --cyan: #4CF2C8;
  --amber: #F2B23C;
  --muted: #9FB5AC;
  --cream: #F5F2E9;
  --line: #2E4A42;
  --ink-on-sand: #131A17;

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

  --header-h: 92px;
  --pad-x: clamp(18px, 4vw, 64px);
  --maxw: 1280px;
  --gap: clamp(16px, 2.4vw, 32px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --radius: 2px;
}

/* ---------- 基础排版 ---------- */
body {
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(42px, 8.2vw, 116px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section-title {
  font-size: clamp(26px, 3.8vw, 50px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.8;
}

.index-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.8;
  color: rgba(76, 242, 200, 0.12);
  -webkit-text-stroke: 1px var(--line);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  opacity: 0.9;
}

/* ---------- 焦点与可访问性 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius);
}

#main-content { display: block; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  transform: translateY(-200%);
  padding: 10px 16px;
  background: var(--cyan);
  color: #06211B;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1px solid #06211B;
  border-radius: var(--radius);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

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

.section { padding-block: clamp(52px, 7.5vw, 116px); }

.section--surface { background: var(--surface); }

.section--sand { background: var(--sand); color: var(--ink-on-sand); }
.section--sand .lede,
.section--sand .card-marker__body { color: #3B4A44; }
.section--sand .rule { background: #C4BBA4; }
.section--sand :focus-visible { outline-color: var(--ink); }
.section--sand .eyebrow { color: #14503F; }

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

.stack { display: grid; gap: var(--gap); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--cream);
  background: transparent;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--solid {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #06211B;
}
.btn--solid:hover { background: #7BF6DA; border-color: #7BF6DA; color: #06211B; }

.btn--ghost {
  border-color: var(--line);
  color: var(--muted);
}
.btn--ghost:hover { color: var(--cyan); border-color: var(--cyan); }

.section--sand .btn { border-color: #A79E88; color: var(--ink-on-sand); }
.section--sand .btn:hover { border-color: var(--ink); color: var(--ink); }
.section--sand .btn--solid { background: var(--ink); border-color: var(--ink); color: var(--sand); }

/* ---------- 头部 ---------- */
.site-header {
  --header-h: 92px;
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(10, 31, 26, 0.95), rgba(10, 31, 26, 0.55) 62%, rgba(10, 31, 26, 0));
  transition: box-shadow 0.28s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  opacity: 0;
  transition: opacity 0.28s var(--ease);
  pointer-events: none;
}

.site-header[data-scrolled="true"] { --header-h: 66px; box-shadow: inset 0 -1px 0 var(--line); }
.site-header[data-scrolled="true"]::before { opacity: 0.97; }

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  height: var(--header-h);
  transition: height 0.28s var(--ease);
}

.header-rail {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: rgba(46, 74, 66, 0.55);
  overflow: hidden;
  z-index: 3;
}

.header-rail__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding-block: 6px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: rgba(76, 242, 200, 0.06);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.brand:hover .brand__mark { background: var(--cyan); color: #06211B; }

.brand__text { display: grid; gap: 2px; }

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.06em;
  line-height: 1.1;
  color: var(--cream);
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
  line-height: 1.2;
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  margin-inline-start: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 28px);
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding-block: 8px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(245, 242, 233, 0.78);
  transition: color 0.18s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.18s var(--ease);
}

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

.site-nav__link[aria-current="page"] { color: var(--cyan); font-weight: 700; }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__note {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  line-height: 1.6;
}

/* 头部动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.header-actions .btn { padding: 11px 16px; font-size: 13px; }

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--cream);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

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

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bar {
  display: block;
  height: 1px;
  width: 100%;
  background: currentColor;
  transform-origin: center;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-deep);
  color: var(--cream);
  border-block-start: 1px solid var(--line);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(46, 74, 66, 0.24) 0 1px, transparent 1px 12.5%),
    radial-gradient(120% 70% at 8% 0%, rgba(76, 242, 200, 0.08), transparent 62%);
  opacity: 0.85;
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: clamp(28px, 4vw, 64px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--pad-x) clamp(32px, 4vw, 52px);
}

.footer-brand { display: grid; gap: 8px; align-content: start; }

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 66px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: rgba(76, 242, 200, 0.14);
  -webkit-text-stroke: 1px rgba(76, 242, 200, 0.5);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--cream);
}

.footer-brand__tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.1em;
  color: var(--muted);
  max-width: 34ch;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
  align-content: start;
}

.footer-col { display: grid; gap: 12px; align-content: start; }

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--amber);
  padding-block-end: 10px;
  border-block-end: 1px solid var(--line);
}

.footer-col__title::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--amber);
  flex: 0 0 auto;
}

.footer-col__list { display: grid; gap: 2px; }

.footer-col__link {
  display: inline-block;
  padding-block: 6px;
  font-size: 15px;
  color: rgba(245, 242, 233, 0.82);
  border-block-end: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-col__link:hover,
.footer-col__link:focus-visible {
  color: var(--cyan);
  border-block-end-color: var(--cyan);
}

.footer-contact {
  position: relative;
  z-index: 1;
  border-block: 1px solid var(--line);
  background: rgba(22, 48, 42, 0.55);
}

.footer-contact__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 36px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 16px var(--pad-x);
}

.footer-contact__item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.7;
}

.footer-contact__value { color: var(--cyan); }

.footer-meta {
  position: relative;
  z-index: 1;
}

.footer-meta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 16px var(--pad-x) 22px;
}

.footer-meta__line,
.footer-meta__copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(159, 181, 172, 0.85);
  line-height: 1.7;
}

.footer-meta__copy { color: rgba(159, 181, 172, 0.6); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding-block: 14px;
  border-block-end: 1px solid var(--line);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.breadcrumb__list > li { display: inline-flex; align-items: center; gap: 10px; }

.breadcrumb__list > li + li::before {
  content: "/";
  color: var(--line);
}

.breadcrumb__link { color: var(--muted); transition: color 0.18s var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }

.breadcrumb__current { color: var(--cream); }

.section--sand .breadcrumb { border-block-end-color: #C4BBA4; }
.section--sand .breadcrumb__list { color: #4A564F; }
.section--sand .breadcrumb__current { color: var(--ink-on-sand); }

/* ---------- 展览说明牌卡片 ---------- */
.card-marker {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px 22px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease),
              background-color 0.18s var(--ease);
}

.card-marker::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.18s var(--ease);
}

.card-marker:hover,
.card-marker:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.card-marker:hover::after,
.card-marker:focus-within::after { transform: scaleX(1); }

.card-marker__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-marker__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.card-marker__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.card-marker__title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--cream);
}

.card-marker__body {
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.card-marker--light {
  background: #F1EAD8;
  border-color: #C9C0A8;
}
.card-marker--light .card-marker__title { color: var(--ink-on-sand); }
.card-marker--light .card-marker__body { color: #4A564F; }
.card-marker--light .card-marker__index { color: #8A6A16; }
.card-marker--light .card-marker__tag { color: #5C6B62; }
.card-marker--light:hover { border-color: var(--ink); }
.card-marker--light::after { background: var(--ink); }

/* ---------- 数据行 ---------- */
.data-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding-block: 12px;
  border-block-end: 1px solid var(--line);
}

.data-row__key {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.data-row__value {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0;
  color: var(--cream);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.data-row--accent .data-row__value { color: var(--cyan); font-weight: 700; }

.section--sand .data-row { border-block-end-color: #C4BBA4; }
.section--sand .data-row__key { color: #4A564F; }
.section--sand .data-row__value { color: var(--ink-on-sand); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.4;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(76, 242, 200, 0.05);
}

.tag--cyan { color: var(--cyan); border-color: rgba(76, 242, 200, 0.5); }
.tag--amber { color: var(--amber); border-color: rgba(242, 178, 60, 0.5); background: rgba(242, 178, 60, 0.08); }

/* ---------- 图片容器（页面阶段放置 img） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--ink-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.05);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(76, 242, 200, 0.14);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cream);
  background: linear-gradient(0deg, rgba(10, 31, 26, 0.92), rgba(10, 31, 26, 0));
}

/* ---------- 入场显现（由 JS 开启 .has-reveal） ---------- */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.has-reveal [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- 平板 ---------- */
@media (max-width: 980px) {
  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin-inline-start: 0;
    padding: 14px var(--pad-x) 26px;
    background: rgba(16, 22, 20, 0.99);
    border-block-end: 1px solid var(--line);
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    z-index: 88;
  }

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

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

  .site-nav__link {
    display: block;
    padding-block: 14px;
    font-size: 16px;
    border-block-end: 1px solid rgba(46, 74, 66, 0.6);
  }

  .site-nav__link::after { display: none; }
  .site-nav__link:hover { color: var(--cyan); }

  .site-nav__note { display: block; margin-block-start: 18px; }

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

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

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

/* ---------- 手机 ---------- */
@media (max-width: 640px) {
  body { font-size: 16px; }

  .site-header { --header-h: 76px; }
  .site-header[data-scrolled="true"] { --header-h: 60px; }

  .brand__mark { width: 34px; height: 34px; font-size: 12px; }
  .brand__name { font-size: 17px; }
  .brand__tagline { font-size: 9px; letter-spacing: 0.16em; }

  .header-actions { gap: 8px; margin-inline-start: auto; }
  .header-actions .btn--ghost { display: none; }
  .header-actions .btn { padding: 10px 12px; font-size: 12px; }

  .nav-toggle { padding: 9px 10px; }
  .nav-toggle__label { display: none; }

  .footer-nav { grid-template-columns: 1fr 1fr; }
  .footer-brand__mark { font-size: 48px; }

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

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

  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
  .media-frame--tall { aspect-ratio: 4 / 5; }
}

/* ---------- 减少动效 ---------- */
@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;
  }

  .card-marker:hover,
  .card-marker:focus-within,
  .btn:hover { transform: none; }

  .has-reveal [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}