/* ==========================================================================
   NB88 SPORT · 共享外壳样式表  /assets/site.css
   高原竞技数据台 · 档案目录型设计系统
   ========================================================================== */

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

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

body { margin: 0; }

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --crimson: #B7271F;
  --crimson-deep: #7E150F;
  --gold: #E3A82E;
  --gold-soft: #F7DFA3;
  --teal: #0E5F5C;
  --teal-light: #1C8A85;
  --indigo: #2C2A66;
  --snow: #FAF7F1;
  --ink: #0D1117;
  --grey: #6E7178;

  /* 结构 */
  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --r-xl: 28px;
  --r-lg: 22px;
  --r-md: 16px;
  --r-sm: 10px;
  --pill: 999px;
  --head-h: 64px;

  /* 反馈 */
  --ring: 2px solid var(--gold);
  --shadow-1: 0 1px 0 rgba(13, 17, 23, .05), 0 10px 24px -18px rgba(13, 17, 23, .55);
  --shadow-2: 0 20px 38px -24px rgba(13, 17, 23, .62);

  /* 字体 */
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--snow);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.25;
}

h1 { font-size: clamp(34px, 5.4vw, 72px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

strong, b { font-weight: 700; }

/* 焦点反馈 */
:where(a, button, summary, [tabindex]):focus-visible {
  outline: var(--ring);
  outline-offset: 3px;
  border-radius: 6px;
}

/* 跳至主内容 */
.skip-link {
  position: fixed;
  left: 14px;
  top: -120px;
  z-index: 200;
  padding: 10px 20px;
  border-radius: var(--pill);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  transition: top .16s ease-out;
}

.skip-link:focus {
  top: 14px;
  outline-offset: 2px;
}

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

.rule {
  height: 1px;
  border: 0;
  background: rgba(13, 17, 23, .12);
  margin-block: clamp(28px, 4vw, 52px);
}

/* ---------- 5. 排版组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--teal);
}

.eyebrow::before {
  content: "";
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--crimson);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.section-head__title {
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 900;
  letter-spacing: -.02em;
}

.section-head__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--teal);
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(14, 95, 92, .38);
  transition: color .16s ease-out, border-color .16s ease-out;
}

.section-head__link:hover {
  color: var(--crimson);
  border-color: var(--crimson);
}

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
}

.prose > * + * { margin-top: 1.2em; }

.prose h2 { margin-top: 1.9em; font-size: clamp(22px, 2.8vw, 30px); }
.prose h3 { margin-top: 1.6em; font-size: clamp(18px, 2.2vw, 23px); }
.prose ul, .prose ol { padding-left: 1.4em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .5em; }
.prose a {
  color: var(--teal);
  border-bottom: 1px solid rgba(14, 95, 92, .4);
}
.prose a:hover { color: var(--crimson); border-color: var(--crimson); }
.prose blockquote {
  padding: 14px 20px;
  border-left: 4px solid var(--gold);
  background: rgba(247, 223, 163, .34);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.tape {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--grey);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  transition: background-color .16s ease-out, border-color .16s ease-out,
              color .16s ease-out, transform .16s ease-out, box-shadow .16s ease-out;
}

.btn:active { transform: translateY(1px); }

.btn--solid {
  background: var(--crimson);
  color: var(--snow);
  box-shadow: inset 0 0 0 1px rgba(250, 247, 241, .16);
}
.btn--solid:hover { background: var(--crimson-deep); }

.btn--quiet {
  border-color: rgba(250, 247, 241, .32);
  color: var(--snow);
}
.btn--quiet:hover {
  background: rgba(250, 247, 241, .12);
  border-color: rgba(250, 247, 241, .55);
}

.btn--gold {
  background: var(--gold);
  color: var(--ink);
}
.btn--gold:hover { background: var(--gold-soft); }

.btn--onlight {
  border-color: rgba(13, 17, 23, .18);
  color: var(--ink);
}
.btn--onlight:hover { background: rgba(13, 17, 23, .06); }

.btn--sm { padding: 6px 13px; font-size: 13px; }

/* ---------- 7. 页头：紧凑命令栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--snow);
}

.topbar__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  min-height: var(--head-h);
  padding-block: 10px;
  transition: min-height .18s ease-out, padding .18s ease-out;
}

.topbar.is-compact .topbar__inner {
  padding-block: 6px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--gold-soft);
  background: linear-gradient(150deg, var(--crimson), var(--crimson-deep));
  box-shadow: inset 0 0 0 1px rgba(250, 247, 241, .22);
  transition: width .18s ease-out, height .18s ease-out, border-radius .18s ease-out;
}

.brand__mark svg {
  width: 22px;
  height: 22px;
}

.topbar.is-compact .brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
}

.brand__stack {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--snow);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: .2em;
  color: rgba(250, 247, 241, .58);
}

.topbar__tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(250, 247, 241, .6);
  padding-left: 16px;
  border-left: 1px solid rgba(250, 247, 241, .18);
  white-space: nowrap;
  transition: opacity .16s ease-out, visibility .16s ease-out;
}

.topbar.is-compact .topbar__tagline {
  opacity: 0;
  visibility: hidden;
}

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 14px;
  border: 1px solid rgba(250, 247, 241, .3);
  border-radius: var(--pill);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  transition: background-color .16s ease-out, border-color .16s ease-out;
}

.nav-toggle:hover { background: rgba(250, 247, 241, .12); }

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

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  width: 100%;
  border-radius: 2px;
  background: currentColor;
  transition: transform .18s ease-out, opacity .18s ease-out;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* 命令栏导航 */
.cmd-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: flex-end;
}

.cmd-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  justify-content: flex-end;
  padding: 4px;
  border-radius: var(--pill);
  background: rgba(250, 247, 241, .06);
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x proximity;
}

.cmd-nav__list::-webkit-scrollbar { display: none; }

.cmd-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--pill);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  scroll-snap-align: center;
  color: rgba(250, 247, 241, .78);
  transition: background-color .16s ease-out, color .16s ease-out;
}

.cmd-nav__link:hover {
  background: rgba(250, 247, 241, .13);
  color: var(--snow);
}

.cmd-nav__link[aria-current="page"] {
  background: var(--crimson);
  color: var(--snow);
  box-shadow: inset 0 0 0 1px rgba(250, 247, 241, .2);
}

.cmd-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  opacity: .62;
}

.cmd-nav__link[aria-current="page"] .cmd-nav__idx { opacity: .9; }

.cmd-nav__pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(227, 168, 46, .22);
}

/* 快捷入口 */
.quickbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(250, 247, 241, .1);
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--crimson) 100%);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--indigo);
  color: var(--snow);
  font-size: 16px;
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .2s ease-out, transform .2s ease-out, visibility .2s linear;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover { background: var(--crimson); }

/* ---------- 8. 页脚 ---------- */
.site-foot {
  position: relative;
  overflow: hidden;
  margin-top: clamp(56px, 8vw, 120px);
  padding-block: clamp(40px, 6vw, 72px) 28px;
  background: var(--indigo);
  color: rgba(250, 247, 241, .82);
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(135deg, rgba(250, 247, 241, .04) 0 1px, transparent 1px 18px),
    radial-gradient(120% 90% at 92% 0%, rgba(183, 39, 31, .38), transparent 62%);
}

.site-foot__grid {
  position: relative;
  display: grid;
  grid-template-columns:
    minmax(200px, 1.5fr)
    repeat(3, minmax(110px, .8fr))
    minmax(210px, 1.35fr);
  gap: clamp(20px, 3vw, 40px);
}

.site-foot__logo {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--snow);
}

.site-foot__sub {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gold);
}

.site-foot__note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(250, 247, 241, .72);
}

.site-foot__meta {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(250, 247, 241, .52);
}

.site-foot__title {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(250, 247, 241, .16);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--gold);
}

.site-foot__list li + li { margin-top: 8px; }

.site-foot__list a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14.5px;
  color: rgba(250, 247, 241, .78);
  border-bottom: 1px solid transparent;
  transition: color .16s ease-out, border-color .16s ease-out;
}

.site-foot__list a:hover {
  color: var(--snow);
  border-color: var(--gold);
}

.site-foot__contact-list li {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: rgba(250, 247, 241, .86);
  word-break: break-word;
}

.site-foot__contact-list li + li { margin-top: 9px; }

.site-foot__key {
  display: inline-block;
  min-width: 3.2em;
  margin-right: 8px;
  color: var(--teal-light);
  letter-spacing: .08em;
}

.site-foot__legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid rgba(250, 247, 241, .16);
  font-size: 12.5px;
  color: rgba(250, 247, 241, .58);
}

/* ---------- 9. 通用基础组件 ---------- */
/* 卡片 */
.card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  border: 1px solid rgba(13, 17, 23, .1);
  border-radius: var(--r-lg);
  background: var(--snow);
  transition: transform .18s ease-out, box-shadow .18s ease-out, border-color .18s ease-out;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: rgba(14, 95, 92, .34);
}

/* 深色数据面板 */
.panel {
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid rgba(28, 138, 133, .45);
  border-radius: var(--r-xl);
  background: var(--ink);
  color: var(--snow);
}

.panel h2, .panel h3 { color: var(--snow); }

.panel p { color: rgba(250, 247, 241, .78); }

/* 量化信息 */
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold);
}

.stat__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--grey);
}

.panel .stat__label { color: rgba(250, 247, 241, .66); }

/* 标签胶囊 */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid rgba(14, 95, 92, .26);
  border-radius: var(--pill);
  background: rgba(14, 95, 92, .1);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: background-color .16s ease-out, border-color .16s ease-out, color .16s ease-out;
}

.chip:hover {
  background: rgba(14, 95, 92, .18);
  border-color: rgba(14, 95, 92, .5);
}

.chip--gold {
  background: var(--gold-soft);
  border-color: rgba(227, 168, 46, .6);
  color: #6B4A06;
}

.chip--crimson {
  background: rgba(183, 39, 31, .1);
  border-color: rgba(183, 39, 31, .3);
  color: var(--crimson);
}

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: clamp(16px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--grey);
}

.crumbs a {
  color: var(--teal);
  border-bottom: 1px solid transparent;
  transition: border-color .16s ease-out, color .16s ease-out;
}

.crumbs a:hover {
  color: var(--crimson);
  border-color: currentColor;
}

.crumbs__sep {
  color: rgba(110, 113, 120, .55);
}

/* 图片容器（供页面阶段放置图片） */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 120% at 18% 8%, rgba(28, 138, 133, .58), transparent 62%),
    linear-gradient(150deg, var(--indigo) 0%, var(--ink) 100%);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(250, 247, 241, .07) 0 2px, transparent 2px 15px);
  pointer-events: none;
}

.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--snow);
  background: linear-gradient(to top, rgba(13, 17, 23, .88), rgba(13, 17, 23, 0));
}

.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1180px) {
  .topbar__tagline { display: none; }
}

@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split { grid-template-columns: minmax(0, 1fr); }

  .site-foot__grid {
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, .9fr));
  }
  .site-foot__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --head-h: 60px; }

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

  .cmd-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    padding: 14px var(--gutter) 20px;
    background: var(--ink);
    border-top: 1px solid rgba(250, 247, 241, .14);
    box-shadow: 0 30px 46px -30px rgba(0, 0, 0, .9);
  }

  .cmd-nav[data-open] { display: block; }

  .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    padding: 0;
    border-radius: 0;
    background: none;
    overflow: visible;
    scroll-snap-type: none;
  }

  .cmd-nav__link {
    justify-content: flex-start;
    padding: 12px 14px;
    border-radius: var(--r-sm);
    font-size: 16px;
  }

  .quickbar .btn { padding: 8px 14px; font-size: 13px; }
}

@media (max-width: 840px) {
  .site-foot__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .site-foot__brand { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .section-head { align-items: flex-start; }
}

@media (max-width: 620px) {
  .quickbar .btn--quiet { display: none; }
  .brand__sub { display: none; }
}

@media (max-width: 520px) {
  .site-foot__grid { grid-template-columns: minmax(0, 1fr); }
  .site-foot__legal { justify-content: flex-start; }
}

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

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

  .card:hover { transform: none; }
  .btn:active { transform: none; }
}