/* ============================================================
   乐动在线主站 / 共享站点样式  ->  /assets/site.css
   框架式导航 + 坐标脉冲视觉体系
   ============================================================ */

:root{
  --clay:#C05A2B;
  --clay-deep:#A34A22;
  --loess:#E9C08A;
  --paper:#F5EFE6;
  --paper-2:#EDE5D8;
  --stone:#6B675F;
  --ink:#0E1B2A;
  --ink-soft:#16283B;
  --cyan:#12C8CE;
  --green:#2FAE6B;
  --moss:#4C6B54;
  --brick:#96361F;
  --line:#DCD5C9;

  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --bar-h:76px;
  --rail-w:248px;
  --wrap:1180px;
  --gutter:clamp(18px,3.6vw,64px);
  --gap:clamp(16px,2.2vw,32px);
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--bar-h) + 20px);}
body{margin:0;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
table{border-collapse:collapse;}

/* ---------- 中文排版 ---------- */
body{
  padding-top:var(--bar-h);
  padding-left:var(--rail-w);
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:900;line-height:1.14;letter-spacing:-.02em;}
a{color:inherit;}
strong,b{font-weight:700;}

.display-1{font-size:clamp(40px,7vw,96px);line-height:.99;letter-spacing:-.025em;font-weight:900;}
.display-2{font-size:clamp(30px,4.6vw,64px);line-height:1.02;letter-spacing:-.022em;font-weight:900;}
.display-3{font-size:clamp(24px,3vw,40px);line-height:1.1;letter-spacing:-.018em;font-weight:900;}

.mono{font-family:var(--mono);letter-spacing:.04em;font-variant-numeric:tabular-nums;}
.mono-tag{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  line-height:1.4;
  letter-spacing:.04em;
  padding:4px 9px;
  border:1px solid currentColor;
  white-space:nowrap;
}
.annotation{font-size:12px;letter-spacing:.3em;color:var(--stone);text-transform:uppercase;}
.annotation--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.34em;
  font-size:12px;
  color:var(--stone);
}

/* ---------- 焦点 ---------- */
:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:1px;
}

/* ---------- 容器与栅格 ---------- */
.wrap{
  width:min(100% - 2 * var(--gutter),var(--wrap));
  margin-inline:auto;
}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
@media (max-width:767px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
}

/* ============================================================
   跳至主内容
   ============================================================ */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--ink);
  color:var(--paper);
  border:2px solid var(--cyan);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);}

/* ============================================================
   框架外壳
   ============================================================ */
.site-frame{
  position:fixed;
  inset:0;
  z-index:90;
  pointer-events:none;
}
.site-frame > *{pointer-events:auto;}

.frame-progress{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--green) 100%);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .14s linear;
  z-index:5;
}

/* ---------- 顶部页边带 ---------- */
.frame-bar{
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:var(--bar-h);
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,34px);
  padding-inline:clamp(14px,2.6vw,36px);
  background:var(--clay);
  color:var(--ink);
  border-bottom:3px solid var(--ink);
  transition:border-color .34s var(--ease),box-shadow .34s var(--ease);
}
.site-frame.is-condensed .frame-bar{
  border-bottom-color:var(--cyan);
  box-shadow:0 6px 0 -3px rgba(14,27,42,.18);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--ink);
}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--paper);
  background:var(--ink);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:-5px;
  border:1px solid var(--cyan);
  pointer-events:none;
}
.brand__lockup{display:block;}
.brand__name{display:block;font-size:17px;font-weight:900;letter-spacing:-.01em;line-height:1.2;}
.brand__sub{
  display:block;
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.12em;
  line-height:1.5;
  color:rgba(14,27,42,.72);
}

.frame-bar__version{flex:0 0 auto;}
.frame-bar__version .mono-tag{color:rgba(14,27,42,.85);}

.frame-bar__actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}

/* ---------- 入口标签 ---------- */
.entry-tag{
  display:inline-flex;
  align-items:center;
  padding:7px 13px;
  font-size:13px;
  font-weight:700;
  line-height:1.5;
  white-space:nowrap;
  text-decoration:none;
  color:var(--ink);
  background:var(--loess);
  border:1px solid rgba(14,27,42,.42);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.entry-tag:hover{background:var(--ink);color:var(--paper);border-color:var(--cyan);}
.entry-tag--beta{background:transparent;border-style:dashed;color:var(--ink);}
.entry-tag--beta:hover{background:var(--brick);border-color:var(--brick);border-style:solid;color:var(--paper);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-size:15px;
  font-weight:700;
  line-height:1.5;
  letter-spacing:.02em;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  background:transparent;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--ink{background:var(--ink);color:var(--paper);box-shadow:3px 3px 0 rgba(14,27,42,.42);}
.btn--ink:hover{background:var(--cyan);color:var(--ink);box-shadow:3px 3px 0 var(--ink);transform:translate(-1px,-1px);}
.btn--clay{background:var(--clay);color:var(--paper);box-shadow:3px 3px 0 rgba(14,27,42,.22);}
.btn--clay:hover{background:var(--clay-deep);transform:translate(-1px,-1px);}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn--ghost:hover{background:var(--ink);color:var(--paper);}

/* ---------- 通用标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-size:12px;
  line-height:1.5;
  letter-spacing:.06em;
  border:1px solid currentColor;
  background:transparent;
}
.tag--mono{font-family:var(--mono);letter-spacing:.04em;}

/* ---------- 移动菜单按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  color:var(--ink);
  background:transparent;
  border:1px solid var(--ink);
  cursor:pointer;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  height:2px;
  background:currentColor;
}
.nav-toggle__bars::before{top:-6px;width:20px;}
.nav-toggle__bars::after{top:6px;width:13px;}
.nav-toggle__text{font-size:13px;font-weight:700;letter-spacing:.08em;}

/* ---------- 纵向导航轨 ---------- */
.frame-rail{
  position:absolute;
  top:var(--bar-h);
  left:0;
  bottom:0;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  padding:20px 0 18px;
  overflow-y:auto;
  overscroll-behavior:contain;
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(18,200,206,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(18,200,206,.09) 1px,transparent 1px);
  background-size:28px 28px;
  color:var(--paper);
  border-right:1px solid rgba(245,239,230,.16);
}

.rail-head{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 18px 16px;
}
.rail-head__label{
  font-size:12px;
  letter-spacing:.3em;
  color:rgba(245,239,230,.55);
}
.rail-head__index{
  font-size:11px;
  color:var(--cyan);
}
.rail-close{
  display:none;
  align-items:center;
  justify-content:center;
  margin-left:auto;
  width:34px;
  height:34px;
  padding:0;
  font-size:18px;
  line-height:1;
  color:var(--paper);
  background:transparent;
  border:1px solid rgba(245,239,230,.42);
  cursor:pointer;
}
.rail-close:hover{border-color:var(--cyan);color:var(--cyan);}

.rail-list{display:flex;flex-direction:column;}

.rail-link{
  display:grid;
  grid-template-columns:34px 1fr 12px;
  align-items:center;
  gap:8px;
  padding:13px 18px;
  color:rgba(245,239,230,.78);
  text-decoration:none;
  font-size:15.5px;
  font-weight:700;
  letter-spacing:.01em;
  border-left:3px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.rail-link__num{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:rgba(245,239,230,.44);
  transition:color .2s var(--ease);
}
.rail-link__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:rgba(245,239,230,.26);
  justify-self:end;
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.rail-link:hover,
.rail-link:focus-visible{
  color:var(--paper);
  background:rgba(18,200,206,.12);
  border-left-color:var(--cyan);
}
.rail-link:hover .rail-link__dot,
.rail-link:focus-visible .rail-link__dot{
  background:var(--cyan);
  transform:scale(1.12);
}
.rail-link[aria-current="page"]{
  background:var(--cyan);
  color:var(--ink);
  border-left-color:var(--paper);
}
.rail-link[aria-current="page"] .rail-link__num{color:rgba(14,27,42,.72);}
.rail-link[aria-current="page"] .rail-link__dot{background:var(--ink);transform:scale(1.12);}

.rail-entries{
  display:none;
  flex-wrap:wrap;
  gap:10px;
  padding:18px;
}

.rail-foot{
  margin-top:auto;
  padding:22px 18px 0;
  border-top:1px solid rgba(245,239,230,.16);
}
.rail-foot__note{
  font-size:12px;
  line-height:1.7;
  letter-spacing:.04em;
  color:rgba(245,239,230,.56);
}
.rail-foot__stat{
  margin-top:6px;
  font-size:22px;
  font-weight:700;
  color:var(--green);
  line-height:1.3;
}
.rail-foot__stat span{
  display:block;
  font-family:var(--sans);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(245,239,230,.5);
}

/* ============================================================
   面包屑
   ============================================================ */
.crumbs{padding:0 0 4px;}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--stone);
}
.crumbs li{display:inline-flex;align-items:center;}
.crumbs li + li::before{
  content:"/";
  margin-right:8px;
  color:var(--line);
}
.crumbs a{color:var(--stone);text-decoration:none;}
.crumbs a:hover{color:var(--clay);}
.crumbs [aria-current="page"]{color:var(--ink);font-weight:700;}

/* ============================================================
   图像容器基础规则（供页面阶段放置图片占位）
   ============================================================ */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--paper-2);
  border:1px solid var(--line);
  box-shadow:3px 3px 0 rgba(14,27,42,.08);
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--ratio-16x9{aspect-ratio:16 / 9;}
.media-frame--ratio-4x3{aspect-ratio:4 / 3;}
.media-frame--ratio-1x1{aspect-ratio:1 / 1;}
.media-frame--ratio-3x4{aspect-ratio:3 / 4;}
.media-frame--grid::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(18,200,206,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(18,200,206,.16) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.5;
}

/* ============================================================
   页脚
   ============================================================ */
.site-foot{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(48px,6vw,80px) var(--gutter) 26px;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(18,200,206,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(18,200,206,.07) 1px,transparent 1px);
  background-size:44px 44px;
  clip-path:polygon(0 0,100% 24px,100% 100%,0 100%);
}
.site-foot a{color:rgba(245,239,230,.86);text-decoration:none;transition:color .2s var(--ease);}
.site-foot a:hover{color:var(--cyan);}

.foot-grid{
  display:grid;
  grid-template-columns:minmax(220px,1.5fr) repeat(3,minmax(120px,.8fr));
  gap:clamp(24px,4vw,56px);
  align-items:start;
}
.foot-brand__name{
  font-size:22px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.3;
}
.foot-brand__name::after{
  content:"";
  display:block;
  width:44px;
  height:3px;
  margin-top:12px;
  background:var(--clay);
}
.foot-brand__line{
  margin-top:14px;
  max-width:30ch;
  font-size:14px;
  line-height:1.85;
  color:rgba(245,239,230,.66);
}
.foot-brand__coord{
  margin-top:14px;
  font-size:11px;
  letter-spacing:.12em;
  color:var(--cyan);
}

.foot-col__title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.3em;
  color:var(--moss);
  filter:brightness(1.85);
}
.foot-list{margin-top:14px;display:flex;flex-direction:column;gap:9px;}
.foot-list a{font-size:14.5px;line-height:1.6;}
.foot-list a:hover{transform:translateX(2px);}

.foot-contact{
  margin-top:clamp(34px,4vw,56px);
  padding-top:clamp(22px,3vw,32px);
  border-top:1px solid rgba(245,239,230,.18);
  display:grid;
  gap:6px;
}
.foot-contact__line{font-size:14.5px;letter-spacing:.03em;color:var(--cyan);}
.foot-contact__addr{font-size:14px;line-height:1.8;color:rgba(245,239,230,.8);}
.foot-contact__note{font-size:12.5px;line-height:1.85;max-width:62ch;color:rgba(245,239,230,.5);}

.foot-legal{
  margin-top:clamp(24px,3vw,36px);
  padding-top:16px;
  border-top:1px solid rgba(245,239,230,.12);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 24px;
  font-size:12px;
  letter-spacing:.05em;
  color:rgba(245,239,230,.52);
}
.foot-legal__icp{color:rgba(245,239,230,.72);}
.foot-legal__build{margin-left:auto;font-size:11px;letter-spacing:.1em;color:var(--moss);filter:brightness(1.85);}

/* ============================================================
   滚动显现
   ============================================================ */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
}
.has-js [data-reveal].is-in{
  opacity:1;
  transform:none;
  transition:opacity .36s var(--ease),transform .36s var(--ease);
}

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

@media (max-width:999px){
  :root{
    --rail-w:0px;
    --bar-h:64px;
  }
  body{padding-left:0;}

  .nav-toggle{display:inline-flex;}
  .frame-bar__actions .entry-tag{display:none;}

  .frame-rail{
    top:var(--bar-h);
    left:0;
    right:0;
    bottom:0;
    width:100%;
    padding:14px 0 26px;
    border-right:none;
    border-top:3px solid var(--clay);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s linear;
    z-index:4;
  }
  .frame-rail[data-open]{
    transform:none;
    opacity:1;
    visibility:visible;
  }
  .rail-head{padding:10px 20px 16px;}
  .rail-close{display:inline-flex;}
  .rail-entries{display:flex;}
  .rail-link{
    grid-template-columns:42px 1fr 14px;
    padding:16px 20px;
    font-size:18px;
  }
  .rail-link__num{font-size:12px;}
  .rail-link__dot{width:8px;height:8px;}
  .rail-foot{padding:22px 20px 0;}

  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-brand{grid-column:1 / -1;}
  .foot-legal__build{margin-left:0;}
}

@media (max-width:640px){
  :root{--bar-h:60px;--gutter:18px;}
  body{font-size:15.5px;}
  .brand__sub{display:none;}
  .brand__mark{width:34px;height:34px;font-size:12px;}
  .brand__name{font-size:15.5px;}
  .frame-bar{gap:10px;padding-inline:14px;}
  .btn{padding:10px 14px;font-size:13.5px;}
  .frame-bar__actions .btn--ink{padding:9px 12px;}
  .nav-toggle{padding:8px 10px;}
  .nav-toggle__text{display:none;}

  .foot-grid{grid-template-columns:1fr;gap:26px;}
  .site-foot{clip-path:polygon(0 0,100% 16px,100% 100%,0 100%);}
  .foot-legal{gap:8px 16px;font-size:11.5px;}
}

/* ============================================================
   减弱动效
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .skip-link{transition:none;}
  .has-js [data-reveal]{opacity:1;transform:none;transition:none;}
  .frame-progress{transition:none;}
  .frame-bar{transition:none;}
  .frame-rail{transition:none;}
  .rail-link,.rail-link__dot,.btn,.entry-tag,.site-foot a{transition:none;}
}