/* ==========================================================================
   火博体育 · 共享样式 /assets/site.css
   夜战仪表盘：炭黑底 + 熔岩橙脉冲 + 电光青反馈 + 珠宝色分区
   ========================================================================== */

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

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

body {
  margin: 0;
  padding-top: var(--strip-h);
  min-height: 100vh;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

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

ul, ol { list-style: none; }

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

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

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

/* ---------- tokens ---------- */
:root {
  --ink: #0B0D10;
  --panel: #14181D;
  --panel-2: #101419;
  --white: #F2F5F7;
  --lava: #FF6A1A;
  --amber: #FFA23A;
  --cyan: #22E0D6;
  --teal: #0C2B2C;
  --indigo: #241B3A;
  --wine: #4A1220;
  --grid: #2A3138;
  --muted: #9AA6AE;
  --ok: #2FBF71;
  --soft: #C9D2D8;

  --rail-w: 268px;
  --strip-h: 46px;
  --pad-x: 20px;

  --font-display: "Arial Black", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(.2, .7, .3, 1);
}

@media (min-width: 768px) {
  :root { --pad-x: 28px; }
}

@media (min-width: 1024px) {
  :root { --strip-h: 48px; }
  body {
    padding-left: var(--rail-w);
    font-size: 17px;
  }
}

/* ---------- 颗粒噪点层 ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 400;
  pointer-events: none;
  opacity: .04;
  background-image: radial-gradient(#FFFFFF 1px, transparent 1px);
  background-size: 3px 3px;
}

/* ---------- focus ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 500;
  padding: 10px 18px;
  background: var(--lava);
  color: #160A03;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .04em;
  transform: translateY(-180%);
  transition: transform .22s var(--ease);
}

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

/* ==========================================================================
   头部框架
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 80;
}

/* --- 顶部细导引条 --- */
.guide-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: var(--strip-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 16px;
  background: rgba(11, 13, 16, .95);
  border-bottom: 1px solid var(--grid);
}

@media (min-width: 1024px) {
  .guide-strip { padding: 0 22px; }
}

.guide-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.guide-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lava);
  animation: lava-pulse 1.8s ease-in-out infinite;
}

.guide-quick {
  display: none;
  align-items: center;
  gap: 4px;
}

@media (min-width: 768px) {
  .guide-quick { display: flex; }
}

.guide-quick-link {
  display: inline-block;
  padding: 5px 10px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--muted);
  border-left: 1px solid var(--grid);
  transition: color .2s var(--ease), background .2s var(--ease);
}

.guide-quick-link:hover {
  color: var(--cyan);
  background: rgba(34, 224, 214, .07);
}

/* --- 框架竖栏 --- */
.frame-rail {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 62px 20px 104px;
  background: var(--ink);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s linear;
}

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

@media (min-width: 1024px) {
  .frame-rail {
    inset: var(--strip-h) auto 0 0;
    width: var(--rail-w);
    z-index: 70;
    gap: 22px;
    padding: 24px 18px 22px;
    border-right: 1px solid var(--grid);
    background: linear-gradient(180deg, #0E1216 0%, #0B0D10 62%);
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }
}

/* --- 品牌块 --- */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--grid);
}

.brand-mark {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--lava);
  color: #160A03;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  line-height: 1;
}

.brand-text {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.brand-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--white);
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* --- 主导航 --- */
.frame-nav {
  flex: 1 1 auto;
}

.nav-list {
  display: grid;
  gap: 2px;
}

.nav-link {
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: baseline;
  gap: 10px;
  padding: 16px 14px;
  border-left: 3px solid transparent;
  color: var(--muted);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

@media (min-width: 1024px) {
  .nav-link {
    grid-template-columns: 32px 1fr;
    padding: 12px 14px 12px 16px;
    font-size: 15px;
  }
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: #5C666E;
  font-variant-numeric: tabular-nums;
}

.nav-label { min-width: 0; }

.nav-link:hover {
  color: var(--white);
  background: rgba(34, 224, 214, .06);
  border-left-color: var(--cyan);
}

.nav-link[aria-current="page"] {
  color: var(--white);
  border-left-color: var(--lava);
  background: linear-gradient(90deg, rgba(255, 106, 26, .18), rgba(255, 106, 26, 0) 82%);
}

.nav-link[aria-current="page"] .nav-num {
  color: var(--amber);
}

/* --- 竖栏底部 --- */
.rail-foot {
  display: grid;
  gap: 8px;
  margin-top: auto;
}

.rail-foot .btn { width: 100%; }

.rail-note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--muted);
  line-height: 1.6;
  padding-top: 12px;
  border-top: 1px solid var(--grid);
}

/* --- 移动轮盘按钮 --- */
.nav-toggle {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 140;
  width: 66px;
  height: 66px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 1px solid var(--lava);
  border-radius: 50%;
  background: rgba(20, 24, 29, .95);
  box-shadow: 0 0 0 6px rgba(255, 106, 26, .08);
  transition: box-shadow .25s var(--ease), background .25s var(--ease);
}

.nav-toggle:hover {
  box-shadow: 0 0 0 10px rgba(255, 106, 26, .12);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.nav-toggle-text {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .18em;
  color: var(--amber);
}

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}

body.nav-open { overflow: hidden; }

/* ==========================================================================
   通用排版与容器
   ========================================================================== */
.wrap {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section {
  padding: 56px 0;
}

@media (min-width: 1024px) {
  .section { padding: 84px 0; }
}

.section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--lava);
}

.display-xl {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(44px, 9vw, 164px);
  line-height: .87;
  letter-spacing: -.02em;
  color: var(--white);
  text-transform: none;
}

.display-l {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 68px);
  line-height: .95;
  letter-spacing: -.015em;
  color: var(--white);
}

.lede {
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--soft);
  max-width: 42ch;
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--grid);
}

/* ---------- 栅格 ---------- */
.grid {
  display: grid;
  gap: 18px;
}

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

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--grid);
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}

/* ---------- 分区底色 ---------- */
.zone-teal { background: var(--teal); }
.zone-indigo { background: var(--indigo); }
.zone-panel { background: var(--panel); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.tag-lava {
  border-color: var(--lava);
  background: rgba(255, 106, 26, .1);
  color: var(--lava);
}

.tag-cyan {
  border-color: var(--cyan);
  color: var(--cyan);
}

.tag-wine {
  background: var(--wine);
  border-color: #6A1B2C;
  color: #F2C9D2;
}

/* ---------- 数据条目 ---------- */
.data-list {
  display: grid;
  border-top: 1px solid var(--grid);
}

.data-row {
  display: grid;
  grid-template-columns: minmax(84px, 1fr) 2fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--grid);
}

.data-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.data-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--white);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  border-bottom: 1px solid var(--grid);
  background: rgba(20, 24, 29, .72);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  max-width: 1360px;
  margin: 0 auto;
  padding: 11px var(--pad-x);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 9px;
  color: #3A434B;
}

.breadcrumb-link { transition: color .2s var(--ease); }

.breadcrumb-link:hover { color: var(--cyan); }

/* ---------- 侧栏索引 ---------- */
.index-rail {
  display: grid;
  gap: 2px;
  align-content: start;
  position: sticky;
  top: calc(var(--strip-h) + 18px);
}

.index-link {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border-left: 2px solid var(--grid);
  font-size: 14px;
  color: var(--muted);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: #5C666E;
  font-variant-numeric: tabular-nums;
}

.index-link:hover {
  color: var(--white);
  border-left-color: var(--cyan);
}

.index-link.is-active {
  color: var(--white);
  border-left-color: var(--lava);
  background: linear-gradient(90deg, rgba(255, 106, 26, .16), rgba(255, 106, 26, 0));
}

.index-link.is-active .index-num { color: var(--amber); }

/* ---------- 手风琴 ---------- */
.accordion {
  border-top: 1px solid var(--grid);
}

.accordion-item {
  border-bottom: 1px solid var(--grid);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 14px;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.accordion-trigger::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lava);
  transition: transform .26s var(--ease);
}

.accordion-trigger[aria-expanded="true"]::after {
  content: "–";
  transform: rotate(180deg);
}

.accordion-trigger:hover {
  color: var(--cyan);
  background: rgba(34, 224, 214, .06);
}

.accordion-panel {
  display: none;
  padding: 0 14px 18px;
  font-size: 15px;
  line-height: 1.68;
  color: var(--soft);
}

.accordion-panel[data-open] { display: block; }

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: #101519;
  border: 1px solid var(--grid);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06) brightness(.94);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(158deg, rgba(255, 106, 26, .16) 0%, rgba(34, 224, 214, .09) 52%, rgba(11, 13, 16, 0) 74%);
}

.ratio-16-9 { aspect-ratio: 16 / 9; }
.ratio-4-3 { aspect-ratio: 4 / 3; }
.ratio-1-1 { aspect-ratio: 1 / 1; }
.ratio-3-4 { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 显现 ---------- */
.reveal {
  opacity: 1;
  transform: none;
}

.js-ready .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .32s var(--ease), transform .32s var(--ease);
}

.js-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  background: var(--panel);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--lava);
  color: var(--white);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  border-left-color: var(--lava);
}

.btn-lava {
  background: var(--lava);
  border-color: var(--lava);
  border-left-color: #FFB37A;
  color: #160A03;
  animation: lava-pulse 1.8s ease-in-out infinite;
}

.btn-lava:hover {
  background: #FF8138;
  border-color: #FF8138;
  border-left-color: #FFD0AC;
  color: #160A03;
}

.btn-line {
  background: transparent;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: 72px;
  border-top: 1px solid var(--grid);
  background: linear-gradient(180deg, #10151A 0%, #0B0D10 72%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 128px;
  height: 3px;
  background: var(--lava);
}

.footer-grid {
  max-width: 1360px;
  margin: 0 auto;
  padding: 46px var(--pad-x) 30px;
  display: grid;
  gap: 30px 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr 1.4fr; }
}

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

.footer-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 30px;
  letter-spacing: -.01em;
  color: var(--white);
}

.footer-mark::after {
  content: ".";
  color: var(--lava);
}

.footer-note {
  font-size: 15px;
  line-height: 1.6;
  color: var(--soft);
  max-width: 30ch;
}

.footer-sub {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 32ch;
}

.footer-cta {
  justify-self: start;
  margin-top: 4px;
  padding: 9px 15px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--lava);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--white);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-cta:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  border-left-color: var(--lava);
}

.footer-col { min-width: 0; }

.footer-head {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--amber);
}

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

.footer-link {
  font-size: 14px;
  color: var(--soft);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.footer-link:hover {
  color: var(--cyan);
  padding-left: 5px;
}

.footer-contact { min-width: 0; }

.contact-list {
  display: grid;
  gap: 13px;
}

.contact-row {
  display: grid;
  gap: 3px;
}

.contact-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--muted);
}

.contact-val {
  font-size: 14px;
  line-height: 1.55;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.footer-legal {
  max-width: 1360px;
  margin: 0 auto;
  padding: 16px var(--pad-x) 34px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted);
}

.footer-copy { color: var(--soft); }

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.legal-link {
  color: var(--muted);
  transition: color .2s var(--ease);
}

.legal-link:hover { color: var(--cyan); }

.footer-icp { color: var(--muted); }

/* ==========================================================================
   动效
   ========================================================================== */
@keyframes lava-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 106, 26, .45); }
  50% { box-shadow: 0 0 0 9px rgba(255, 106, 26, 0); }
}

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

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

  .js-ready .reveal {
    opacity: 1;
    transform: none;
  }

  .btn-lava,
  .guide-dot { animation: none; }
}