/* ==========================================================================
   BB赛场 · 共享站点套件 /assets/site.css
   轨道深蓝侧轨 + 暖沙白正文 + 电光蓝比分 + 信号橙状态
   ========================================================================== */

:root{
  /* 色彩 */
  --ink:#0C1116;
  --ink-2:#090D12;
  --track:#16212C;
  --sand:#F6F0E4;
  --sand-2:#E9DEC7;
  --gold:#C08A3E;
  --gold-deep:#8A5E22;
  --blue:#1E6BFF;
  --cyan:#2BB3C0;
  --signal:#FF6A2B;
  --signal-deep:#C94B12;
  --text:#1A1F26;
  --muted:#6E7A87;

  --line:rgba(26,31,38,.14);
  --line-strong:rgba(26,31,38,.28);
  --line-light:rgba(246,240,228,.14);
  --sand-70:rgba(246,240,228,.72);
  --sand-45:rgba(246,240,228,.46);

  /* 尺度 */
  --rail-w:76px;
  --header-h:68px;
  --wrap:1240px;
  --gutter:clamp(16px,2vw,24px);

  /* 字体栈 */
  --sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Barlow Condensed","Oswald","Bebas Neue","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* 动效 */
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-1:0 18px 40px -32px rgba(12,17,22,.55);
  --focus:var(--blue);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,picture{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:var(--blue);text-underline-offset:3px}
table{border-collapse:collapse;width:100%}
hr{border:0}

/* ---------- 中文排版基础 ---------- */
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--sand);
  padding-left:var(--rail-w);
  padding-top:var(--header-h);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 80% at 88% -10%,rgba(192,138,62,.10) 0%,transparent 60%),
    radial-gradient(100% 70% at 0% 100%,rgba(30,107,255,.06) 0%,transparent 55%),
    repeating-linear-gradient(115deg,rgba(26,31,38,.02) 0 1px,transparent 1px 5px);
}

h1,h2,h3,h4,h5{
  font-family:var(--display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:-.01em;
  text-wrap:balance;
  color:inherit;
}
h1{font-size:clamp(34px,5vw,72px);line-height:1.06;letter-spacing:.02em}
h2{font-size:clamp(26px,3vw,34px)}
h3{font-size:clamp(20px,2vw,26px)}
h4{font-size:clamp(17px,1.6vw,20px);line-height:1.3}

p{font-size:16px;line-height:1.75}
strong{font-weight:700}
small{font-size:12px}

:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:3px;
  border-radius:1px;
}
[data-section]:target{outline:none}

/* ---------- 通用工具 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.section{padding-block:clamp(56px,7vw,96px)}
.section--band{padding-block:clamp(72px,9vw,140px)}
.section--tight{padding-block:clamp(32px,4vw,56px)}

.num{
  font-family:var(--mono);
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}

.display{
  font-family:var(--display);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.1;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  line-height:1;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold-deep);
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--gold);
  flex:0 0 auto;
}

.label{
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

.prose{max-width:36em}
.prose p + p{margin-top:1.1em}
.prose h2{margin-top:2.2em;margin-bottom:.6em}
.prose h3{margin-top:1.8em;margin-bottom:.5em}
.prose ul{list-style:none;margin-top:1em}
.prose ul li{position:relative;padding-left:1.15em;margin-bottom:.5em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:6px;
  height:1px;
  background:var(--gold);
}

.rule{height:1px;background:var(--line);border:0;width:100%}
.rule--gold{
  height:1px;
  background:linear-gradient(90deg,var(--gold) 0 64px,var(--line) 64px 100%);
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:var(--gutter)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,3.4vw,56px)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}

.bleed-top{margin-top:calc(-1 * var(--header-h))}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  font-family:var(--sans);
  font-size:13px;
  font-weight:600;
  line-height:1;
  letter-spacing:.08em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:0;
  white-space:nowrap;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

.btn--signal{
  background:var(--signal);
  color:var(--ink);
  border-color:var(--signal-deep);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.28);
}
.btn--signal:hover{background:#FF7E45;box-shadow:inset 0 1px 0 rgba(255,255,255,.34),0 8px 18px -12px rgba(255,106,43,.9)}

.btn--line{
  background:transparent;
  color:currentColor;
  border-color:currentColor;
  border-color:rgba(246,240,228,.42);
  opacity:.92;
}
.btn--line:hover{border-color:var(--gold);color:var(--gold);opacity:1}

/* 深底 / 浅底自适应描边 */
.site-header[data-scrolled="true"] .btn--line,
.on-light .btn--line{
  border-color:var(--line-strong);
  color:var(--text);
}
.site-header[data-scrolled="true"] .btn--line:hover,
.on-light .btn--line:hover{border-color:var(--gold-deep);color:var(--gold-deep)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-size:11px;
  line-height:1.6;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  border:1px solid var(--line-strong);
  background:rgba(246,240,228,.6);
}
.tag--signal{
  color:#8A2F0B;
  border-color:rgba(255,106,43,.55);
  background:rgba(255,106,43,.12);
}
.tag--blue{
  color:#0F3E9C;
  border-color:rgba(30,107,255,.45);
  background:rgba(30,107,255,.10);
}
.dot{
  display:inline-block;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--signal);
  flex:0 0 auto;
}
.dot[data-live="true"]{animation:pulse 1.8s var(--ease) infinite}
@keyframes pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(255,106,43,.55)}
  50%{opacity:.72;box-shadow:0 0 0 5px rgba(255,106,43,0)}
}

/* ---------- 面板 ---------- */
.panel{
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.36);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--shadow-1);
}
.panel--dark{
  background:
    repeating-linear-gradient(115deg,rgba(246,240,228,.04) 0 1px,transparent 1px 9px),
    linear-gradient(160deg,var(--track) 0%,#0E1720 100%);
  color:var(--sand-70);
  border-color:rgba(246,240,228,.16);
}
.panel--dark h2,.panel--dark h3,.panel--dark strong{color:var(--sand)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{
  content:"/";
  color:var(--line-strong);
  font-family:var(--mono);
}
.breadcrumbs a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
.breadcrumbs a:hover{color:var(--blue)}
.breadcrumbs [aria-current="page"]{color:var(--text);font-weight:600}

/* ---------- 图片容器（页面阶段放占位） ---------- */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:
    repeating-linear-gradient(115deg,rgba(26,31,38,.05) 0 1px,transparent 1px 7px),
    linear-gradient(140deg,var(--sand-2) 0%,#D9CCB2 100%);
  border:1px solid var(--line-strong);
}
.media > img,
.media > picture,
.media > video,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--wide{aspect-ratio:21 / 9}
.media--4x3{aspect-ratio:4 / 3}
.media--1x1{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:3 / 4}
.media--dark{
  background:
    repeating-linear-gradient(115deg,rgba(246,240,228,.05) 0 1px,transparent 1px 9px),
    linear-gradient(150deg,var(--track) 0%,#0B1219 100%);
  border-color:rgba(246,240,228,.16);
}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:12px 14px;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--sand);
  background:linear-gradient(to top,rgba(12,17,22,.88) 0%,rgba(12,17,22,.35) 60%,transparent 100%);
}
.media__badge{
  position:absolute;
  top:10px;
  left:10px;
  z-index:2;
}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:calc(var(--rail-w) + 12px);
  z-index:200;
  padding:10px 18px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--ink);
  background:var(--sand);
  border:1px solid var(--gold);
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

main{display:block}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header{position:relative;z-index:60}

/* 侧轨 */
.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:70;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  padding:16px 0 18px;
  color:var(--sand);
  background:linear-gradient(180deg,#101A24 0%,var(--track) 42%,#0F1922 100%);
  border-right:1px solid var(--line-light);
}
.rail::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(246,240,228,.05) 0 1px,transparent 1px 8px);
  opacity:.55;
}
.rail > *{position:relative;z-index:1}

.rail__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
  text-decoration:none;
  color:var(--sand);
}
.rail__brand-mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  font-family:var(--display);
  font-weight:700;
  font-size:14px;
  letter-spacing:-.02em;
  color:var(--ink);
  background:linear-gradient(155deg,var(--sand) 0%,var(--sand-2) 58%,var(--gold) 100%);
  box-shadow:inset 0 0 0 1px rgba(12,17,22,.22);
  transition:box-shadow .2s var(--ease);
}
.rail__brand:hover .rail__brand-mark{box-shadow:inset 0 0 0 1px var(--gold-deep),0 0 0 3px rgba(192,138,62,.22)}
.rail__brand-word{
  writing-mode:vertical-rl;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--sand-45);
  text-transform:uppercase;
}

.rail__meter{
  position:relative;
  flex:1 1 auto;
  width:2px;
  min-height:80px;
  margin:4px 0;
  background:
    repeating-linear-gradient(to bottom,rgba(246,240,228,.34) 0 1px,transparent 1px 11px),
    rgba(246,240,228,.10);
}
.rail__meter-fill{
  position:absolute;
  top:0;left:0;right:0;
  height:calc(var(--p,0) * 100%);
  background:linear-gradient(180deg,var(--blue) 0%,var(--cyan) 55%,var(--gold) 100%);
  box-shadow:0 0 10px rgba(30,107,255,.45);
  transition:height .12s linear,width .12s linear;
}

.rail__label{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  font-size:10px;
  line-height:1.3;
  letter-spacing:.16em;
  color:var(--sand-45);
  text-transform:uppercase;
}
.rail__label-key{
  max-width:56px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  text-align:center;
}
.rail__label .num{color:var(--sand-70);font-size:10px}

.rail__top{
  display:grid;
  place-items:center;
  gap:1px;
  width:36px;
  height:36px;
  color:var(--sand-70);
  border:1px solid var(--line-light);
  background:rgba(246,240,228,.04);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease),opacity .18s var(--ease);
}
.rail__top:hover{color:var(--ink);background:var(--gold);border-color:var(--gold)}
.rail__top[data-visible="false"]{opacity:.32;pointer-events:none}
.rail__top-arrow{font-size:13px;line-height:1}
.rail__top-text{font-family:var(--mono);font-size:8px;letter-spacing:.12em}

/* 顶部条 */
.header-bar{
  position:fixed;
  top:0;
  left:var(--rail-w);
  right:0;
  z-index:60;
  height:var(--header-h);
  display:flex;
  align-items:center;
  color:var(--sand);
  background:rgba(12,17,22,.78);
  -webkit-backdrop-filter:blur(14px) saturate(125%);
  backdrop-filter:blur(14px) saturate(125%);
  border-bottom:1px solid rgba(246,240,228,.12);
  transition:background-color .28s var(--ease),color .18s linear,border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header[data-scrolled="true"] .header-bar{
  background:var(--sand);
  color:var(--text);
  border-bottom-color:var(--line-strong);
  box-shadow:0 14px 30px -26px rgba(12,17,22,.75);
  -webkit-backdrop-filter:none;
  backdrop-filter:none;
}

.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.6vw,26px);
  width:100%;
  max-width:var(--wrap);
  height:100%;
  margin-inline:auto;
  padding-inline:clamp(16px,2.6vw,36px);
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
  color:inherit;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  font-family:var(--display);
  font-weight:700;
  font-size:14px;
  letter-spacing:-.02em;
  color:var(--ink);
  background:linear-gradient(155deg,var(--sand) 0%,var(--sand-2) 58%,var(--gold) 100%);
  box-shadow:inset 0 0 0 1px rgba(12,17,22,.22);
}
.brand__text{display:flex;flex-direction:column;gap:1px;line-height:1}
.brand__name{
  font-family:var(--display);
  font-size:19px;
  font-weight:700;
  letter-spacing:.02em;
}
.brand__sub{
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  opacity:.95;
}
.site-header[data-scrolled="true"] .brand__sub{color:var(--gold-deep)}

/* 导航 */
.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:var(--header-h);
  padding:0 12px;
  font-size:14px;
  letter-spacing:.06em;
  text-decoration:none;
  color:inherit;
  opacity:.84;
  transition:color .18s var(--ease),opacity .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:15px;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover{opacity:1;color:var(--gold)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{opacity:1;font-weight:600}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-header[data-scrolled="true"] .site-nav__link:hover{color:var(--gold-deep)}
.site-header[data-scrolled="true"] .site-nav__link[aria-current="page"]::after{background:var(--gold-deep)}

.site-nav__foot{display:none}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:8px}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:8px 10px;
  color:inherit;
  border:1px solid rgba(246,240,228,.3);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.site-header[data-scrolled="true"] .nav-toggle{border-color:var(--line-strong)}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold)}
.nav-toggle[aria-expanded="true"]{background:var(--signal);border-color:var(--signal-deep);color:var(--ink)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{
  display:block;
  height:1.5px;
  width:100%;
  background:currentColor;
  transition:transform .24s var(--ease),opacity .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) 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(-5.5px) rotate(-45deg)}
.nav-toggle__text{font-size:11px;letter-spacing:.2em;text-transform:uppercase}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,6vw,96px);
  padding-top:clamp(52px,7vw,84px);
  color:var(--sand-70);
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(30,107,255,.12) 0%,transparent 58%),
    radial-gradient(90% 70% at 92% 12%,rgba(192,138,62,.14) 0%,transparent 60%),
    linear-gradient(180deg,#0B1015 0%,var(--ink) 44%,var(--ink-2) 100%);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--gold) 0 14%,var(--blue) 14% 26%,rgba(246,240,228,.18) 26% 100%);
}
.site-footer::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(246,240,228,.035) 0 1px,transparent 1px 9px);
}

.footer__inner{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,2.1fr) minmax(0,1.05fr);
  gap:clamp(28px,4vw,56px);
  padding-bottom:clamp(36px,5vw,60px);
}

.footer__lede{min-width:0}
.footer__brand-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--sand);
}
.footer__mark{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  font-family:var(--display);
  font-weight:700;
  font-size:15px;
  letter-spacing:-.02em;
  color:var(--ink);
  background:linear-gradient(155deg,var(--sand) 0%,var(--sand-2) 58%,var(--gold) 100%);
  box-shadow:inset 0 0 0 1px rgba(12,17,22,.24);
}
.footer__brand-text{
  font-family:var(--display);
  font-size:22px;
  font-weight:700;
  letter-spacing:.02em;
}
.footer__tagline{
  margin-top:16px;
  max-width:17em;
  font-size:15px;
  line-height:1.75;
  color:var(--sand-70);
}
.footer__micro{
  margin-top:14px;
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--sand-45);
}

.footer__nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(20px,3vw,32px);
  min-width:0;
}
.footer__col{min-width:0}
.footer__col-title{
  margin-bottom:14px;
  padding-bottom:8px;
  font-family:var(--sans);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  line-height:1.4;
  color:var(--gold);
  border-bottom:1px solid var(--line-light);
}
.footer__list{display:grid;gap:9px}
.footer__link{
  display:inline-block;
  padding:2px 0;
  font-size:14px;
  line-height:1.6;
  color:var(--sand-70);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer__link:hover{color:var(--sand);border-bottom-color:var(--gold)}
.footer__link--sm{font-size:12px;letter-spacing:.06em}

.footer__contact{min-width:0}
.footer__contact-row{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:8px;
  margin-bottom:10px;
  font-size:13.5px;
  line-height:1.65;
}
.footer__contact-key{
  padding-top:3px;
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--sand-45);
}
.footer__contact-value{color:var(--sand);word-break:break-word}
.footer__note{
  margin-top:14px;
  font-size:12px;
  line-height:1.7;
  color:var(--sand-45);
}

.footer__bar{
  position:relative;
  z-index:1;
  border-top:1px solid var(--line-light);
}
.footer__bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 22px;
  padding-block:16px 22px;
}
.footer__legal{font-size:12px;letter-spacing:.04em;color:var(--sand-70)}
.footer__icp{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--sand-45);
}
.footer__legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin-left:auto;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1199px){
  .header-actions .btn--line{display:none}
  .site-nav__link{padding:0 9px;font-size:13px;letter-spacing:.04em}
  .site-nav__link::after{left:9px;right:9px}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1023px){
  .footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer__lede{grid-column:1 / -1}
  .footer__contact{grid-column:1 / -1}
}

@media (max-width:960px){
  :root{--rail-w:0px;--header-h:58px}

  body{
    padding-left:0;
    padding-bottom:calc(54px + env(safe-area-inset-bottom));
  }

  /* 侧轨折叠为底部横向条 */
  .rail{
    top:auto;
    bottom:0;
    left:0;
    right:0;
    width:auto;
    height:54px;
    flex-direction:row;
    align-items:center;
    gap:14px;
    padding:0 14px calc(env(safe-area-inset-bottom));
    border-right:0;
    border-top:1px solid var(--line-light);
    box-shadow:0 -12px 26px -22px rgba(0,0,0,.9);
  }
  .rail__brand{flex-direction:row;gap:8px}
  .rail__brand-mark{width:28px;height:28px;font-size:12px}
  .rail__brand-word{
    writing-mode:horizontal-tb;
    font-size:10px;
    letter-spacing:.18em;
  }
  .rail__meter{
    flex:1 1 auto;
    width:auto;
    height:2px;
    min-height:0;
    margin:0;
    background:
      repeating-linear-gradient(to right,rgba(246,240,228,.34) 0 1px,transparent 1px 11px),
      rgba(246,240,228,.10);
  }
  .rail__meter-fill{
    inset:0 auto 0 0;
    width:calc(var(--p,0) * 100%);
    height:auto;
    background:linear-gradient(90deg,var(--blue) 0%,var(--cyan) 55%,var(--gold) 100%);
  }
  .rail__label{flex-direction:row;gap:6px;font-size:9px;letter-spacing:.1em}
  .rail__label-key{display:none}
  .rail__top{
    width:32px;height:32px;
    grid-auto-flow:column;
    gap:3px;
  }
  .rail__top-text{display:none}

  /* 头部 */
  .header-bar{left:0}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;bottom:0;
    z-index:65;
    display:flex;
    flex-direction:column;
    padding:8px clamp(18px,5vw,32px) calc(84px + env(safe-area-inset-bottom));
    overflow-y:auto;
    color:var(--sand);
    background:
      repeating-linear-gradient(115deg,rgba(246,240,228,.045) 0 1px,transparent 1px 9px),
      linear-gradient(180deg,#0B1117 0%,#111B25 100%);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(246,240,228,.10)}
  .site-nav__link{
    height:auto;
    width:100%;
    padding:16px 4px;
    font-family:var(--display);
    font-size:22px;
    letter-spacing:.04em;
    opacity:.9;
  }
  .site-nav__link::after{
    left:4px;right:auto;bottom:10px;
    width:0;height:2px;
    transform:none;
    transition:width .24s var(--ease);
  }
  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after{transform:none;width:26px}
  .site-nav__link[aria-current="page"]{color:var(--gold)}
  .site-nav__foot{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
  .site-nav__foot .btn{flex:1 1 150px}

  .header-actions{display:none}

  body[data-nav-open="true"]{overflow:hidden}

  /* 网格 */
  .grid--split,
  .grid--halves,
  .grid--12{grid-template-columns:minmax(0,1fr)}

  .footer__inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__legal-links{margin-left:0}
}

@media (max-width:720px){
  body{font-size:15.5px}
  .brand__sub{display:none}
  .brand__name{font-size:17px}
  .footer__bar-inner{flex-direction:column;align-items:flex-start;gap:8px}
  .footer__legal-links{gap:14px}
  .grid--split{gap:24px}
}

@media (max-width:480px){
  .header-inner{padding-inline:14px;gap:10px}
  .brand__mark{width:30px;height:30px;font-size:12px}
  .footer__nav{grid-template-columns:minmax(0,1fr)}
  .site-nav__foot .btn{flex:1 1 100%}
}

/* ---------- 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;
  }
  .btn:hover,
  .rail__top:hover,
  .skip-link{transform:none !important}
  .dot[data-live="true"]{animation:none;box-shadow:none}
  .rail__meter-fill{transition:none}
}

@media print{
  .rail,.header-bar,.footer__bar,.skip-link{display:none !important}
  body{padding:0;background:#fff;color:#000}
  .site-footer{background:#fff;color:#000;border-top:1px solid #000}
}