/* ==========================================================================
   K体育官方网站 · 共享样式 /assets/site.css
   深夜球场绿底 · 荧光黄强调 · 战术台账三重层次
   ========================================================================== */

/* 1. 变量
   ========================================================================== */
:root{
  --field:#0B3D2E;
  --shadow-deep:#072A20;
  --fluro:#E8FF3A;
  --board:#F4F7F2;
  --grid:#D6DED6;
  --alert:#FF5A36;
  --amber:#FFB020;
  --mist:#8FA79B;
  --mid:#0F4C3A;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --shell-max:1280px;
  --gutter:clamp(16px,3vw,40px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:200ms;
  --line:rgba(214,222,214,.18);
  --line-strong:rgba(214,222,214,.34);
}

/* 2. Reset 与基础排版
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 84% -12%, rgba(15,76,58,.62), transparent 62%),
    var(--field);
  color:var(--board);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.16;
  margin:0 0 .62em;
}
h1{font-size:clamp(30px,4.6vw,46px);}
h2{font-size:clamp(24px,3vw,34px);}
h3{font-size:clamp(18px,1.6vw,20px);font-weight:700;letter-spacing:-.005em;}
h4{font-size:16px;font-weight:700;letter-spacing:0;}

p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

ul,ol{padding-left:1.25em;margin:0 0 1.1em;}
li{margin-bottom:.35em;}

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

button{font:inherit;}

a{color:inherit;}

:focus-visible{
  outline:2px solid var(--fluro);
  outline-offset:3px;
  border-radius:2px;
}

::selection{background:var(--fluro);color:var(--shadow-deep);}

/* 3. 布局容器与栅格
   ========================================================================== */
.shell,
.header-shell,
.footer-shell{
  width:min(var(--shell-max),100% - (var(--gutter) * 2));
  margin-inline:auto;
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  column-gap:clamp(18px,2.4vw,36px);
  row-gap:clamp(24px,3vw,44px);
}
.col-main{grid-column:1 / span 7;}
.col-aside{grid-column:9 / span 3;}
.col-wide{grid-column:1 / span 10;}
.col-full{grid-column:1 / -1;}

.section{
  position:relative;
  padding-block:clamp(44px,6.5vw,92px);
}
.section--bleed{border-top:1px solid var(--line);}

/* 4. 章节标记与排版工具
   ========================================================================== */
.chapter-marker{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
  margin:0 0 18px;
}
.chapter-number{color:var(--fluro);}
.chapter-rule{
  flex:0 0 auto;
  width:52px;
  height:2px;
  background:var(--fluro);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--fluro);
  margin:0 0 14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--fluro);
}

.mono{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em;}

.prose{max-width:68ch;}
.prose a{
  color:var(--board);
  text-decoration:underline;
  text-decoration-color:var(--mist);
  text-decoration-thickness:1px;
  text-underline-offset:4px;
  transition:color var(--dur) var(--ease),text-decoration-color var(--dur) var(--ease);
}
.prose a:hover{
  color:var(--fluro);
  text-decoration-color:var(--fluro);
}

.annotation{
  font-size:13px;
  line-height:1.72;
  color:var(--mist);
  border-left:2px solid rgba(143,167,155,.5);
  padding-left:12px;
  margin:14px 0 0;
}

/* 5. 面板层：玻璃 / 实色
   ========================================================================== */
.glass-panel{
  background:rgba(15,76,58,.44);
  border:1px solid rgba(232,255,58,.24);
  border-radius:2px;
  padding:clamp(18px,2.6vw,32px);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.solid-panel{
  background:var(--board);
  color:var(--field);
  border:1px solid var(--grid);
  border-radius:2px;
  padding:clamp(18px,2.6vw,32px);
}
.solid-panel h1,.solid-panel h2,.solid-panel h3,.solid-panel h4{color:var(--field);}
.solid-panel .annotation{color:#547264;border-left-color:var(--grid);}

/* 6. 按钮
   ========================================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:2px;
  text-decoration:none;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn-primary{background:var(--fluro);color:var(--shadow-deep);border-color:var(--fluro);}
.btn-primary:hover{background:#f2ff77;border-color:#f2ff77;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--board);border-color:var(--mist);}
.btn-ghost:hover{color:var(--fluro);border-color:var(--fluro);}

/* 7. 面包屑
   ========================================================================== */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
}
.breadcrumb li{margin:0;}
.breadcrumb li::after{
  content:"/";
  margin-left:8px;
  color:rgba(143,167,155,.55);
}
.breadcrumb li:last-child::after{content:"";}
.breadcrumb a{
  color:var(--mist);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.breadcrumb a:hover{color:var(--fluro);}

/* 8. 卡片与目录
   ========================================================================== */
.card{
  position:relative;
  display:block;
  background:rgba(15,76,58,.5);
  border:1px solid var(--line);
  border-left:1px solid transparent;
  border-radius:2px;
  padding:20px 22px;
  color:var(--board);
  text-decoration:none;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),
             background var(--dur) var(--ease);
}
.card:hover,.card:focus-visible{
  transform:translateY(-4px);
  border-left-color:var(--fluro);
  background:var(--mid);
}
.card-title{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--board);
  margin:0 0 8px;
}
.card-meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
  margin:0;
}

.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:clamp(14px,2vw,22px);
}
.card-grid--offset > *:nth-child(even){margin-top:18px;}

.index-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}
.index-link{
  display:block;
  padding:10px 0 10px 16px;
  font-size:15px;
  color:var(--mist);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),
             background var(--dur) var(--ease);
}
.index-link:hover{color:var(--fluro);}
.index-link[aria-current]{
  color:var(--fluro);
  border-left-color:var(--fluro);
  background:rgba(232,255,58,.07);
}

/* 9. 数据表
   ========================================================================== */
.data-table-wrap{
  width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.data-table{
  width:100%;
  min-width:520px;
  border-collapse:collapse;
  font-size:15px;
}
.data-table caption{
  text-align:left;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--mist);
  padding:0 0 10px;
}
.data-table th{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  text-align:left;
  padding:10px 12px;
  color:var(--mist);
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.data-table td{
  padding:12px;
  vertical-align:top;
  border-bottom:1px solid var(--line);
}
.data-table tbody tr:nth-child(odd){background:rgba(143,167,155,.07);}
.data-table tbody tr:hover,
.data-table tbody tr:focus-within{background:var(--mid);}
.data-table .num{
  font-family:var(--font-mono);
  font-weight:600;
  color:var(--fluro);
  white-space:nowrap;
}
.solid-panel .data-table{color:var(--field);min-width:0;}
.solid-panel .data-table caption{color:#547264;}
.solid-panel .data-table th{color:#547264;border-bottom-color:var(--grid);}
.solid-panel .data-table td{border-bottom-color:var(--grid);}
.solid-panel .data-table tbody tr:nth-child(odd){background:rgba(11,61,46,.05);}
.solid-panel .data-table tbody tr:hover,
.solid-panel .data-table tbody tr:focus-within{background:rgba(232,255,58,.55);}
.solid-panel .data-table .num{color:var(--field);}

/* 10. 数字、标签、筛选
   ========================================================================== */
.metric{
  display:grid;
  gap:6px;
  min-width:0;
}
.metric-value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(3.5rem,9vw,7rem);
  line-height:.88;
  letter-spacing:-.03em;
  color:var(--fluro);
  overflow-wrap:anywhere;
}
.metric-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--mist);
  line-height:1.6;
}
.metric-row{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:clamp(18px,3vw,40px);
}

.tag{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  padding:3px 9px;
  border:1px solid currentColor;
  border-radius:2px;
  color:var(--mist);
  white-space:nowrap;
}
.tag--alert{color:var(--alert);}
.tag--amber{color:var(--amber);}
.tag--live{color:var(--fluro);}

.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  padding:8px 14px;
  background:transparent;
  color:var(--board);
  border:1px solid var(--mist);
  border-radius:2px;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--fluro);color:var(--fluro);}
.chip[aria-pressed="true"]{
  background:var(--fluro);
  border-color:var(--fluro);
  color:var(--shadow-deep);
  font-weight:600;
}

/* 11. 横向滚动条与图片容器
   ========================================================================== */
.scroll-strip{
  display:flex;
  gap:clamp(12px,1.8vw,22px);
  overflow-x:auto;
  padding:6px 0 18px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
}
.scroll-strip > *{
  flex:0 0 clamp(220px,26vw,320px);
  scroll-snap-align:start;
}
.scroll-strip--mask{
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 34px,#000 calc(100% - 52px),transparent 100%);
  mask-image:linear-gradient(90deg,transparent 0,#000 34px,#000 calc(100% - 52px),transparent 100%);
}

.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--mid);
  border:1px solid var(--line);
  border-radius:2px;
}
.media-frame img,
.media-frame video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.06) brightness(.9);
}
.media-frame--portrait{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame figcaption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  margin:0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--board);
  background:linear-gradient(180deg,rgba(7,42,32,0),rgba(7,42,32,.9));
}

/* 12. 顶部导航
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  box-shadow:none;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.site-header.is-condensed{
  background:var(--shadow-deep);
  border-bottom-color:var(--fluro);
  box-shadow:0 16px 36px rgba(0,0,0,.34);
}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,36px);
  padding-block:15px;
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-120px;
  z-index:200;
  padding:10px 16px;
  background:var(--fluro);
  color:var(--shadow-deep);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  text-decoration:none;
  border-radius:2px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px;}

.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 1 auto;
  text-decoration:none;
  color:var(--board);
}
.brand-glyph{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:38px;
  height:38px;
  background:var(--fluro);
  color:var(--shadow-deep);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:20px;
  line-height:1;
  border-radius:2px;
}
.brand-text{
  display:grid;
  gap:2px;
  min-width:0;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:-.01em;
  line-height:1.2;
  white-space:nowrap;
}
.brand-line{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.3;
  color:var(--mist);
  white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.site-header.is-condensed .brand-line{color:var(--fluro);}

.header-nav{
  display:flex;
  align-items:center;
  gap:clamp(16px,2.2vw,36px);
  margin-left:auto;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(14px,1.8vw,28px);
  list-style:none;
  margin:0;
  padding:0;
}
.nav-item{margin:0;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--board);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:100%;
  bottom:0;
  height:2px;
  background:var(--fluro);
  transition:right var(--dur) var(--ease);
}
.nav-link:hover{color:var(--fluro);}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after{right:0;}
.nav-link[aria-current="page"]{color:var(--fluro);}

.header-utility{
  display:flex;
  align-items:center;
  gap:clamp(14px,1.8vw,24px);
  padding-left:clamp(14px,1.8vw,26px);
  border-left:1px solid var(--line);
}
.utility-list{
  display:flex;
  align-items:center;
  gap:16px;
  list-style:none;
  margin:0;
  padding:0;
}
.utility-list li{margin:0;}
.utility-link{
  font-size:13px;
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.utility-link:hover{color:var(--fluro);border-bottom-color:var(--fluro);}

.header-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
  background:var(--fluro);
  color:var(--shadow-deep);
  border:1px solid var(--fluro);
  border-radius:2px;
  text-decoration:none;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.header-cta:hover{background:transparent;color:var(--fluro);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  background:transparent;
  color:var(--board);
  border:1px solid var(--mist);
  border-radius:2px;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--fluro);color:var(--fluro);}
.nav-toggle-text{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
}
.nav-toggle-bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:18px;
}
.nav-toggle-bar{
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--fluro);color:var(--fluro);}
.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);}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  background:var(--fluro);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 90ms linear;
}

/* 13. 页脚
   ========================================================================== */
.site-footer{
  background:var(--shadow-deep);
  border-top:1px solid rgba(232,255,58,.34);
  color:var(--board);
  font-size:15px;
  padding:clamp(42px,6vw,74px) 0 26px;
  margin-top:clamp(48px,7vw,96px);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,7fr);
  gap:clamp(20px,4vw,64px);
  align-items:start;
  padding-bottom:34px;
  border-bottom:1px solid var(--line);
}
.footer-brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(20px,2vw,24px);
  letter-spacing:-.01em;
  margin:0 0 8px;
  color:var(--board);
}
.footer-brand-line{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--fluro);
  margin:0;
}
.footer-trust{
  margin:0;
  max-width:56ch;
  font-size:14px;
  line-height:1.85;
  color:var(--mist);
}

.footer-columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,44px);
  padding:34px 0;
  border-bottom:1px solid var(--line);
}
.footer-col{min-width:0;}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--fluro);
  margin:0 0 14px;
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.footer-links li{margin:0;}
.footer-link{
  display:inline-block;
  font-size:15px;
  color:var(--board);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--fluro);border-bottom-color:var(--fluro);}

.footer-contact{
  display:grid;
  gap:12px;
  padding:30px 0;
  border-bottom:1px solid var(--line);
}
.contact-line{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.03em;
  color:var(--board);
  overflow-wrap:anywhere;
}
.service-note{
  margin:0;
  max-width:72ch;
  font-size:13px;
  line-height:1.75;
  color:var(--mist);
}
.copy-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:4px;
}
.copy-btn{
  padding:8px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  background:transparent;
  color:var(--board);
  border:1px solid var(--mist);
  border-radius:2px;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.copy-btn:hover{border-color:var(--fluro);color:var(--fluro);}
.copy-btn.is-copied{
  background:var(--fluro);
  border-color:var(--fluro);
  color:var(--shadow-deep);
  font-weight:600;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.legal-line,.copyright{margin:0;}

/* 14. 响应式
   ========================================================================== */
@media (max-width:1024px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-main,.col-aside,.col-wide{grid-column:1 / -1;}
  .col-full{grid-column:1 / -1;}
}

@media (max-width:960px){
  body{font-size:16px;}

  .site-header{background:var(--shadow-deep);border-bottom-color:var(--line);}
  .site-header.is-condensed{border-bottom-color:var(--fluro);}

  .header-shell{
    flex-wrap:wrap;
    gap:12px;
    padding-block:12px;
  }
  .brand-line{display:none;}
  .nav-toggle{display:inline-flex;}

  .header-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:8px var(--gutter) 24px;
    background:var(--shadow-deep);
    border-top:1px solid var(--fluro);
    border-bottom:1px solid rgba(232,255,58,.22);
    box-shadow:0 24px 44px rgba(0,0,0,.42);
    max-height:min(72vh,620px);
    overflow-y:auto;
  }
  .header-nav[data-open]{display:flex;}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{border-bottom:1px solid var(--line);}
  .nav-link{
    display:block;
    padding:14px 0;
    font-size:16px;
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{padding-left:14px;}
  .nav-link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;
    top:50%;
    transform:translateY(-50%);
    width:3px;
    height:18px;
    background:var(--fluro);
  }

  .header-utility{
    flex-direction:column;
    align-items:stretch;
    gap:16px;
    margin-top:18px;
    padding-left:0;
    border-left:0;
  }
  .utility-list{flex-direction:column;gap:12px;}
  .utility-link{font-size:14px;}
  .header-cta{justify-content:center;width:100%;padding:13px 18px;}

  .footer-top{grid-template-columns:minmax(0,1fr);}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-bottom{justify-content:flex-start;}
}

@media (max-width:640px){
  :root{--gutter:16px;}
  .footer-columns{grid-template-columns:minmax(0,1fr);}
  .card-grid--offset > *:nth-child(even){margin-top:10px;}
  .metric-value{font-size:clamp(3rem,17vw,4.6rem);}
  .data-table{font-size:14px;}
  .scroll-strip > *{flex-basis:min(76vw,300px);}
}

/* 15. 可访问性与动效偏好
   ========================================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:1ms !important;
    animation-duration:1ms !important;
    animation-iteration-count:1 !important;
  }
  .card:hover,.card:focus-visible,
  .btn-primary:hover{transform:none;}
  .scroll-progress{transition:none;}
}