/* ============================================================
   /assets/site.css — 完美体育赛场 共享外壳与基础组件
   竞技场深蓝指挥区 + 米白阅读区 + 荧光青/信号橙状态语言
   ============================================================ */

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

html{
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  background: #0B1E33;
}

body{
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 0.94rem + 0.16vw, 17px);
  line-height: 1.75;
  font-weight: 400;
  color: var(--on-dark);
  background: var(--arena-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4{
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

ul, ol{ margin: 0; padding: 0; }

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

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

button{ font: inherit; color: inherit; }

table{ border-collapse: collapse; width: 100%; }

/* ---------- tokens ---------- */
:root{
  /* 矿物 + 赛场色板 */
  --arena-900: #0B1E33;
  --command-800: #122C47;
  --cyan-400: #35F2D0;
  --orange-500: #FF7A3C;
  --silver-400: #A7B4C2;
  --rock-600: #3A4652;
  --moss-500: #6F8F6A;
  --clay-500: #B66A4B;
  --cream-100: #F4F0E6;
  --paper-50: #FCFAF4;

  /* 语义色 */
  --on-dark: #E6EDF4;
  --on-dark-dim: #C0CCD8;
  --on-dark-muted: #8595A5;
  --on-light: #0B1E33;
  --on-light-muted: #47586A;

  --line-strong: rgba(167, 180, 194, 0.34);
  --line-soft: rgba(167, 180, 194, 0.16);
  --line-light: rgba(11, 30, 51, 0.16);

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono", "DejaVu Sans Mono", monospace;

  /* 尺度 */
  --maxw: 1280px;
  --gutter: clamp(18px, 4vw, 48px);
  --gap: clamp(16px, 2.2vw, 32px);
  --radius: 2px;

  /* 动效 */
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.22s;
  --dur-slow: 0.32s;
}

/* ---------- 焦点与可访问 ---------- */
:focus-visible{
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: var(--radius);
}
.surface-paper :focus-visible{ outline-color: var(--arena-900); }

.skip-link{
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  transform: translateY(-180%);
  padding: 10px 18px;
  background: var(--cyan-400);
  color: var(--arena-900);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus{ transform: translateY(0); }

#main-content{ display: block; }

/* ============================================================
   头部：状态条 + 粘性命令栏
   ============================================================ */
.site-header{ position: relative; z-index: 60; }

/* --- 状态条 --- */
.status-strip{
  background: #071523;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--on-dark-muted);
}
.status-strip__inner{
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 34px;
  padding-block: 4px;
}
.status-strip__badge{
  background: var(--orange-500);
  color: var(--arena-900);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  padding: 2px 7px;
  border-radius: 1px;
}
.status-dot{
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  flex: none;
}
.status-strip__text{ color: var(--on-dark-dim); }
.status-strip__text--muted{ color: #74869A; }
.status-strip__divider{
  width: 1px;
  height: 11px;
  background: var(--line-strong);
  flex: none;
}
.status-strip__link{
  margin-left: auto;
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--dur) var(--ease);
}
.status-strip__link:hover{ color: #8CFFEB; }

/* --- 命令栏 --- */
.command-bar{
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--command-800);
  border-bottom: 1px solid var(--line-strong);
  box-shadow: 0 18px 34px -30px rgba(0, 0, 0, 0.95);
}
.command-bar__inner{
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  min-height: 64px;
}

/* --- 品牌 --- */
.brand{
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
  color: #FFFFFF;
  transition: opacity var(--dur) var(--ease);
}
.brand:hover{ opacity: 0.86; }
.brand-mark{
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--orange-500);
  color: var(--arena-900);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 76% 100%, 0 100%);
  flex: none;
}
.brand-text{
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-name{
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #FFFFFF;
}
.brand-sub{
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--silver-400);
}

/* --- 主导航 --- */
.primary-nav{
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}
.nav-list{
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-item{ list-style: none; }
.nav-link{
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 11px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--on-dark-dim);
  border-radius: var(--radius);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-link__num{
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--silver-400);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-link__label{ white-space: nowrap; }
.nav-link:hover{
  color: #FFFFFF;
  background-color: rgba(53, 242, 208, 0.09);
}
.nav-link:hover .nav-link__num{ color: var(--cyan-400); opacity: 1; }
.nav-link[aria-current="page"]{ color: #FFFFFF; }
.nav-link[aria-current="page"] .nav-link__num{ color: var(--orange-500); opacity: 1; }
.nav-link[aria-current="page"]::after{
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: var(--orange-500);
}

/* --- 右侧元信息 --- */
.command-bar__meta{
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}
.status-pill{
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  border: 1px solid rgba(53, 242, 208, 0.36);
  background: rgba(53, 242, 208, 0.07);
  border-radius: 999px;
  white-space: nowrap;
}
.status-pill__dot{
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  animation: arena-pulse 2.6s var(--ease) infinite;
  flex: none;
}
@keyframes arena-pulse{
  0%, 100%{ box-shadow: 0 0 0 0 rgba(53, 242, 208, 0.42); }
  55%{ box-shadow: 0 0 0 5px rgba(53, 242, 208, 0); }
}

/* --- 移动端索引按钮 --- */
.nav-toggle{
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover{ border-color: var(--cyan-400); background: rgba(53, 242, 208, 0.08); }
.nav-toggle__icon{
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}
.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease), bottom var(--dur) var(--ease);
}
.nav-toggle__icon::before{ top: 0; }
.nav-toggle__icon::after{ bottom: 0; }
.site-header[data-open] .nav-toggle__icon::before{ top: 5px; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__icon::after{ bottom: 5px; transform: rotate(-45deg); }

/* --- 滚动进度 --- */
.scroll-progress{
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.scroll-progress__bar{
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-400), var(--orange-500));
  will-change: transform;
}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.2em;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn--primary{
  background: var(--orange-500);
  color: var(--arena-900);
  border-color: var(--orange-500);
}
.btn--primary:hover{ background: #FF9260; border-color: #FF9260; }
.btn--ghost{
  background: transparent;
  color: var(--cyan-400);
  border-color: rgba(53, 242, 208, 0.42);
}
.btn--ghost:hover{
  background: rgba(53, 242, 208, 0.1);
  border-color: var(--cyan-400);
  color: #9BFFEF;
}
.btn--small{
  padding: 0.52em 0.9em;
  font-size: 12.5px;
  letter-spacing: 0.05em;
}
.surface-paper .btn--ghost{
  color: var(--arena-900);
  border-color: rgba(11, 30, 51, 0.32);
}
.surface-paper .btn--ghost:hover{
  background: rgba(11, 30, 51, 0.06);
  border-color: var(--arena-900);
  color: var(--arena-900);
}

/* ============================================================
   容器 / 区块 / 排版
   ============================================================ */
.container{
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section{
  padding-block: clamp(48px, 7vw, 104px);
}

.surface-paper{
  background: var(--cream-100);
  color: var(--on-light);
}
.surface-paper h1,
.surface-paper h2,
.surface-paper h3,
.surface-paper h4{ color: var(--arena-900); }
.surface-paper a{
  color: var(--arena-900);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(11, 30, 51, 0.35);
}
.surface-paper a:hover{ text-decoration-color: var(--orange-500); }
.surface-paper .btn{ text-decoration: none; }

.prose{ max-width: 68ch; }
.prose > * + *{ margin-top: 1.05em; }
.prose p{ margin: 0; }
.prose h2{
  margin-top: 1.9em;
  font-size: clamp(21px, 2.3vw, 30px);
  letter-spacing: -0.01em;
}
.prose h3{
  margin-top: 1.6em;
  font-size: clamp(17px, 1.6vw, 21px);
}
.prose ul,
.prose ol{ padding-left: 1.25em; }
.prose li + li{ margin-top: 0.45em; }

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver-400);
}
.eyebrow::before{
  content: "";
  width: 18px;
  height: 2px;
  background: var(--orange-500);
  flex: none;
}
.surface-paper .eyebrow{ color: var(--on-light-muted); }

.index-num{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
  color: var(--silver-400);
}
.surface-paper .index-num{ color: var(--on-light-muted); }

/* ============================================================
   网格 / 面板 / 标签
   ============================================================ */
.grid{
  display: grid;
  gap: var(--gap);
}
.grid--12{ grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2{ grid-template-columns: repeat(2, minmax(0, 1fr)); }

.panel{
  background: var(--command-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 28px);
}
.surface-paper .panel{
  background: var(--paper-50);
  border-color: var(--line-light);
}

.tag{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
  border: 1px solid currentColor;
  border-radius: 1px;
  color: var(--silver-400);
}
.tag--cyan{ color: var(--cyan-400); }
.tag--orange{ color: var(--orange-500); }
.tag--moss{ color: var(--moss-500); }
.tag--clay{ color: var(--clay-500); }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
}
.breadcrumb__list{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb__item{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.breadcrumb__item + .breadcrumb__item::before{
  content: "/";
  color: rgba(167, 180, 194, 0.45);
}
.breadcrumb__link{
  color: var(--on-dark-muted);
  transition: color var(--dur) var(--ease);
}
.breadcrumb__link:hover{ color: var(--cyan-400); }
.surface-paper .breadcrumb,
.surface-paper .breadcrumb__link{ color: var(--on-light-muted); }
.surface-paper .breadcrumb__link:hover{ color: var(--arena-900); }

/* ============================================================
   图片容器基础规则（页面阶段放入 <img>）
   ============================================================ */
.media-frame{
  position: relative;
  overflow: hidden;
  background: var(--command-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}
.media-frame img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame::after{
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 122, 60, 0.85) 50%);
  pointer-events: none;
}
.media-frame--16x9{ aspect-ratio: 16 / 9; }
.media-frame--4x5{ aspect-ratio: 4 / 5; }
.media-frame--1x1{ aspect-ratio: 1 / 1; }
.media-frame--wide{ aspect-ratio: 21 / 9; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position: relative;
  background: #071523;
  border-top: 1px solid var(--line-strong);
  color: var(--on-dark);
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1.2fr 0.8fr;
  gap: clamp(24px, 3vw, 56px);
  padding-block: clamp(40px, 6vw, 78px);
}
.footer-brand{ display: flex; flex-direction: column; align-items: flex-start; }
.brand--footer{ margin-bottom: 16px; }
.footer-tagline{
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--on-dark-dim);
}
.footer-stamp{
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--moss-500);
  border-left: 2px solid var(--clay-500);
  padding-left: 10px;
}
.footer-col{ min-width: 0; }
.footer-heading{
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-400);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}
.footer-nav{ display: block; }
.footer-links{
  list-style: none;
  display: grid;
  gap: 10px;
}
.footer-links li{ list-style: none; }
.footer-links a{
  display: inline-block;
  font-size: 14px;
  color: var(--on-dark-dim);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-links a:hover{
  color: var(--cyan-400);
  border-bottom-color: rgba(53, 242, 208, 0.5);
}
.footer-contact{
  list-style: none;
  display: grid;
  gap: 14px;
}
.footer-contact li{ list-style: none; }
.footer-contact__label{
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver-400);
  margin-bottom: 3px;
}
.footer-contact__value{
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-dark);
  word-break: break-word;
  overflow-wrap: anywhere;
}
.footer-base{ border-top: 1px solid var(--line-soft); }
.footer-base__inner{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--on-dark-muted);
}
.footer-copy{ margin: 0; }
.footer-icp{ margin: 0; color: var(--on-dark-dim); }
.footer-note{ margin: 0; }

/* ============================================================
   显现动画（JS 添加 .has-reveal 后才生效）
   ============================================================ */
.has-reveal [data-reveal]{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.has-reveal [data-reveal].is-visible{
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px){
  .footer-grid{ grid-template-columns: 1.4fr 1fr 1.2fr; }
  .footer-col:last-child{ grid-column: 2 / span 2; }
}

@media (max-width: 960px){
  html{ scroll-padding-top: 80px; }

  .status-pill{ display: none; }

  .command-bar__inner{ min-height: 60px; }

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

  .primary-nav{
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    justify-content: flex-start;
    background: var(--arena-900);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 28px 44px -26px rgba(0, 0, 0, 0.9);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease), visibility var(--dur-slow) linear;
    max-height: calc(100vh - 96px);
    max-height: calc(100dvh - 96px);
    overflow-y: auto;
  }
  .site-header[data-open] .primary-nav{
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list{
    display: block;
    padding: 8px var(--gutter) 22px;
  }
  .nav-link{
    display: flex;
    width: 100%;
    padding: 14px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
  }
  .nav-link:hover{ background: transparent; color: var(--cyan-400); }
  .nav-link__num{ min-width: 28px; }
  .nav-link[aria-current="page"]::after{
    left: 0;
    right: auto;
    width: 26px;
    bottom: 9px;
  }

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

@media (max-width: 760px){
  .footer-grid{
    grid-template-columns: 1fr 1fr;
    gap: 28px 24px;
  }
  .footer-brand{ grid-column: 1 / -1; }
  .footer-col:last-child{ grid-column: auto; }
}

@media (max-width: 560px){
  .command-bar__meta{ display: none; }
  .brand-sub{ display: none; }
  .status-strip__text--muted,
  .status-strip__divider{ display: none; }
  .status-strip{ font-size: 10.5px; }
  .status-strip__link{ margin-left: auto; }
  .footer-grid{ grid-template-columns: 1fr; }
  .footer-base__inner{ justify-content: flex-start; }
  .media-frame--wide{ aspect-ratio: 4 / 3; }
}

@media (max-width: 640px){
  .media-frame--4x5,
  .media-frame--16x9,
  .media-frame--1x1{ aspect-ratio: 4 / 3; }
}

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