/* =========================================================
   OD看台 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

:root{
  /* 品牌色板 */
  --snow:#DCEBEE;
  --sand:#E6D2B5;
  --neon:#B8FF3D;
  --stand:#FF6A2A;
  --night:#0B172A;
  --ink:#121417;
  --mist:#F8F9F4;
  --stone:#B9C4C8;
  --alert:#D7263D;
  --turf:#2F7D4E;

  /* 结构变量 */
  --line:rgba(18,20,23,.12);
  --line-night:rgba(185,196,200,.24);
  --muted:#5b6770;

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Roboto Mono",monospace;

  --header-h:80px;
  --container:1280px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--mist);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.01em;
}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
img{height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
hr{border:0}

/* ---------- 焦点 ---------- */
:focus-visible{outline:2px solid var(--stand);outline-offset:3px;border-radius:1px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--neon)}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:999;
  transform:translateY(-180%);
  background:var(--neon);
  color:var(--night);
  padding:10px 18px;
  font-size:14px;font-weight:800;letter-spacing:.06em;
  text-decoration:none;
  border-radius:var(--radius);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

#main-content{scroll-margin-top:calc(var(--header-h) + 12px)}

/* ---------- 排版工具 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(44px,7vw,112px);
  line-height:.94;
  letter-spacing:-.03em;
}
.num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.02em;
}
.annot{
  font-size:12px;
  font-weight:800;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--stand);
}
.note{font-size:13px;line-height:1.7;color:var(--muted);letter-spacing:.02em}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}
.divider{height:1px;background:var(--line);margin:32px 0}

/* ---------- 容器与栅格 ---------- */
.container{
  width:min(calc(100% - 40px),var(--container));
  margin-inline:auto;
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:20px;
}

/* ---------- 区块抬头 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px 32px;
  padding-bottom:16px;
  margin-bottom:32px;
  border-bottom:1px solid var(--line);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(26px,3.4vw,42px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.1;
  margin:0;
}
.section-more{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid var(--stone);
  padding-bottom:2px;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.section-more:hover{color:var(--stand);border-color:var(--stand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:800;
  letter-spacing:.06em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),
             border-color .24s var(--ease),transform .24s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--neon);color:var(--night);border-color:var(--neon)}
.btn--primary:hover{background:var(--mist);border-color:var(--mist);color:var(--night)}
.btn--night{background:var(--night);color:var(--mist);border-color:var(--night)}
.btn--night:hover{background:var(--ink);border-color:var(--ink)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--mist)}
.btn--sm{padding:9px 16px;font-size:13px;letter-spacing:.08em}

/* ---------- 标签 / 展签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--stone);
  border-radius:999px;
  background:var(--mist);
  color:var(--ink);
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  line-height:1.4;
  text-transform:uppercase;
}
.tag--neon{background:var(--neon);border-color:var(--neon);color:var(--night)}
.tag--orange{background:var(--stand);border-color:var(--stand);color:var(--mist)}

/* ---------- Bento 基础块 ---------- */
.panel{
  position:relative;
  background:var(--mist);
  border:1px solid var(--stone);
  border-radius:var(--radius);
  padding:clamp(18px,2vw,28px);
  box-shadow:0 1px 0 rgba(11,23,42,.05),0 18px 40px -34px rgba(11,23,42,.65);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.panel:hover{
  transform:translateY(-3px);
  border-color:var(--night);
  box-shadow:0 1px 0 rgba(11,23,42,.05),0 26px 48px -30px rgba(11,23,42,.7);
}
.panel--night{background:var(--night);color:var(--mist);border-color:rgba(185,196,200,.28)}
.panel--night:hover{border-color:var(--neon)}
.panel--snow{background:var(--snow);border-color:rgba(11,23,42,.16)}
.panel--sand{background:var(--sand);border-color:rgba(11,23,42,.16)}
.panel--neon{background:var(--neon);border-color:var(--neon);color:var(--night)}

/* ---------- 图片容器（页面阶段放 <img>） ---------- */
.img-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--radius);
  border:1px solid rgba(185,196,200,.34);
  background:
    radial-gradient(120% 90% at 20% 0%,#1b2c48 0%,rgba(27,44,72,0) 60%),
    linear-gradient(140deg,var(--night) 0%,#152338 55%,#0e1a2c 100%);
  aspect-ratio:4/3;
}
.img-frame>img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  transition:transform .42s var(--ease);
}
.img-frame:hover>img{transform:scale(1.03)}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,23,42,0) 42%,rgba(11,23,42,.62) 100%);
}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--tall{aspect-ratio:3/4}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:22px 0 6px;font-size:13px;color:var(--muted)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--stone);font-family:var(--font-num)}
.breadcrumb a{
  color:inherit;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.breadcrumb a:hover{color:var(--ink);border-bottom-color:var(--stand)}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:700}

/* ---------- 正文窄栏 ---------- */
.prose{max-width:680px;font-size:17px;line-height:1.78}
.prose h2{margin:1.6em 0 .5em;font-size:clamp(22px,2.4vw,30px)}
.prose h3{margin:1.4em 0 .4em;font-size:clamp(18px,2vw,22px)}
.prose p{margin:0 0 1.1em}
.prose ul{list-style:none;margin:0 0 1.2em;display:grid;gap:8px}
.prose ul li{position:relative;padding-left:18px}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:8px;height:2px;
  background:var(--stand);
}

/* ---------- 显现动效 ---------- */
html[data-reveal-ready] [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
}
html[data-reveal-ready] [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* =========================================================
   头部：左右分置 · 闸机式导航
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--night);
  color:var(--mist);
  border-bottom:1px solid var(--line-night);
  transition:box-shadow .3s var(--ease),background-color .3s var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  pointer-events:none;
  background:linear-gradient(90deg,var(--neon) 0 22%,var(--stand) 22% 34%,rgba(185,196,200,0) 34%);
  opacity:.85;
}
.site-header[data-compact]{box-shadow:0 18px 36px -26px rgba(0,0,0,.95)}

.header-inner{
  width:min(calc(100% - 40px),var(--container));
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  transition:min-height .3s var(--ease);
}
.site-header[data-compact] .header-inner{min-height:56px}

/* 品牌锁形 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--mist);
  text-decoration:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;height:38px;
  border:1.5px solid var(--neon);
  border-radius:var(--radius);
  color:var(--neon);
  transition:background-color .3s var(--ease),color .3s var(--ease),transform .3s var(--ease),width .3s var(--ease),height .3s var(--ease);
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark{
  background:var(--neon);
  color:var(--night);
  transform:translateY(-1px);
}
.brand-glyph{width:22px;height:22px}
.brand-type{display:flex;flex-direction:column;line-height:1}
.brand-name{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:900;
  letter-spacing:.03em;
}
.brand-sub{
  margin-top:6px;
  font-family:var(--font-num);
  font-size:9px;
  letter-spacing:.34em;
  color:rgba(248,249,244,.5);
}
.site-header[data-compact] .brand-mark{width:32px;height:32px}
.site-header[data-compact] .brand-glyph{width:18px;height:18px}
.site-header[data-compact] .brand-sub{display:none}

.header-right{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}

/* 闸机式主导航 */
.gate-nav{
  display:flex;
  align-items:center;
  gap:18px;
  min-width:0;
}
.gate-list{
  display:flex;
  align-items:center;
  gap:2px;
  min-width:0;
}
.gate-item{position:relative}
.gate-link{
  position:relative;
  display:block;
  padding:9px 13px;
  border-radius:var(--radius);
  font-size:14px;
  font-weight:700;
  letter-spacing:.05em;
  color:rgba(248,249,244,.74);
  text-decoration:none;
  white-space:nowrap;
  transition:color .24s var(--ease),background-color .24s var(--ease);
}
.gate-link::before{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:2px;
  height:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.gate-link::after{
  content:attr(data-note);
  position:absolute;
  left:50%;
  top:calc(100% + 9px);
  transform:translate(-50%,-6px);
  padding:4px 9px;
  border-radius:var(--radius);
  background:var(--neon);
  color:var(--night);
  font-size:11px;
  font-weight:800;
  letter-spacing:.08em;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  z-index:6;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.gate-link:hover,
.gate-link:focus-visible{
  color:var(--mist);
  background:rgba(184,255,61,.08);
}
.gate-link:hover::before,
.gate-link:focus-visible::before{transform:scaleX(1)}
.gate-link:hover::after,
.gate-link:focus-visible::after{opacity:1;transform:translate(-50%,0)}
.gate-link[aria-current="page"]{
  background:var(--neon);
  color:var(--night);
}
.gate-link[aria-current="page"]::before{
  background:var(--stand);
  transform:scaleX(1);
}
.gate-link[aria-current="page"]::after{
  background:var(--stand);
  color:var(--mist);
}

/* 工具入口 */
.gate-tools{
  display:flex;
  align-items:center;
  gap:6px;
  padding-left:18px;
  border-left:1px solid var(--line-night);
}
.gate-tool{
  display:block;
  padding:7px 11px;
  border:1px solid var(--line-night);
  border-radius:var(--radius);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.06em;
  color:rgba(248,249,244,.66);
  text-decoration:none;
  white-space:nowrap;
  transition:color .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease);
}
.gate-tool:hover,
.gate-tool:focus-visible{
  background:var(--stand);
  border-color:var(--stand);
  color:var(--night);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid var(--line-night);
  border-radius:var(--radius);
  background:transparent;
  color:var(--mist);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .24s var(--ease),background-color .24s var(--ease);
}
.nav-toggle:hover{border-color:var(--neon)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;height:12px;
}
.nav-toggle-bar{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  background:var(--neon);
  transition:transform .3s var(--ease),top .3s var(--ease);
}
.nav-toggle-bar:nth-child(1){top:0}
.nav-toggle-bar:nth-child(2){top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){top:5px;transform:rotate(-45deg)}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  background:var(--night);
  color:rgba(248,249,244,.72);
  overflow:hidden;
}
.footer-stripe{
  height:5px;
  background:linear-gradient(90deg,var(--neon) 0 40%,var(--stand) 40% 56%,var(--sand) 56% 100%);
}
.footer-inner{
  width:min(calc(100% - 40px),var(--container));
  margin-inline:auto;
  display:grid;
  grid-template-columns:1.5fr .85fr .85fr 1.1fr;
  gap:clamp(24px,3vw,48px);
  padding:clamp(40px,5vw,72px) 0 clamp(32px,4vw,56px);
}
.footer-brand{min-width:0}
.footer-logo{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,34px);
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--mist);
  text-decoration:none;
  transition:color .24s var(--ease);
}
.footer-logo:hover{color:var(--neon)}
.footer-claim{
  margin:14px 0 10px;
  font-size:15px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--sand);
}
.footer-meta{
  margin:0 0 14px;
  max-width:36ch;
  font-size:13px;
  line-height:1.75;
  color:rgba(248,249,244,.58);
}
.footer-hours{
  margin:0;
  font-family:var(--font-num);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.03em;
  color:var(--stone);
}
.footer-col{min-width:0}
.footer-title{
  margin:0 0 18px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-night);
  font-family:var(--font-body);
  font-size:12px;
  font-weight:800;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:rgba(248,249,244,.48);
}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;
  font-size:14px;
  letter-spacing:.02em;
  color:rgba(248,249,244,.78);
  text-decoration:none;
  transition:color .24s var(--ease),transform .24s var(--ease);
}
.footer-link:hover{color:var(--neon);transform:translateX(3px)}
.footer-link--legal{
  font-size:12.5px;
  letter-spacing:.06em;
  color:rgba(248,249,244,.55);
}
.footer-notes{display:grid;gap:12px}
.footer-note{
  display:grid;
  grid-template-columns:42px 1fr;
  gap:10px;
  font-size:13px;
  line-height:1.65;
  color:rgba(248,249,244,.72);
  word-break:break-word;
}
.footer-note-key{
  padding-top:2px;
  font-size:11px;
  font-weight:800;
  letter-spacing:.16em;
  color:var(--stand);
}
.footer-base{
  border-top:1px solid var(--line-night);
  background:rgba(0,0,0,.24);
}
.footer-base-inner{
  width:min(calc(100% - 40px),var(--container));
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding:20px 0;
}
.footer-copy,
.footer-icp{
  margin:0;
  font-size:12.5px;
  letter-spacing:.03em;
  color:rgba(248,249,244,.5);
}
.footer-icp{font-family:var(--font-num);color:rgba(248,249,244,.62)}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 18px}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1200px){
  .gate-link{padding:9px 10px;font-size:13px}
  .gate-link::before{left:10px;right:10px}
  .gate-nav{gap:12px}
  .gate-tools{padding-left:12px}
}

@media (max-width:1080px){
  :root{--header-h:64px}
  .header-inner{width:min(calc(100% - 32px),var(--container));gap:12px}
  .nav-toggle{display:inline-flex}

  .gate-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px 20px 22px;
    background:var(--night);
    border-top:1px solid var(--line-night);
    border-bottom:1px solid var(--line-night);
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    box-shadow:0 30px 48px -28px rgba(0,0,0,.9);
  }
  .gate-nav[data-open]{display:flex}

  .gate-list{flex-direction:column;align-items:stretch;gap:0}
  .gate-item{border-bottom:1px solid var(--line-night)}
  .gate-link{
    padding:15px 4px;
    font-size:16px;
    font-weight:800;
    letter-spacing:.04em;
  }
  .gate-link::before{left:4px;right:auto;width:0;bottom:9px;transform:none;transition:width .3s var(--ease)}
  .gate-link:hover::before,
  .gate-link:focus-visible::before,
  .gate-link[aria-current="page"]::before{width:28px}
  .gate-link::after{display:none}
  .gate-link:hover,
  .gate-link:focus-visible{background:rgba(184,255,61,.06)}
  .gate-link[aria-current="page"]{background:transparent;color:var(--neon)}

  .gate-tools{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:18px 0 0;
    border-left:0;
  }
  .gate-tool{padding:13px 10px;text-align:center;font-size:14px}
}

@media (max-width:960px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:900px){
  .grid{grid-template-columns:repeat(4,1fr);gap:16px}
}

@media (max-width:600px){
  .container,
  .header-inner,
  .footer-inner,
  .footer-base-inner{width:min(calc(100% - 32px),var(--container))}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer-base-inner{justify-content:flex-start}
  .brand-sub{display:none}
  .btn{width:100%}
  .btn--inline{width:auto}
  .section-head{align-items:flex-start}
}

/* ---------- 减少动效 ---------- */
@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;
  }
  html[data-reveal-ready] [data-reveal]{opacity:1;transform:none}
  .panel:hover{transform:none}
  .img-frame:hover>img{transform:none}
  .footer-link:hover{transform:none}
}