/* ==========================================================================
   银河游艺 · 共享外壳样式表 /assets/site.css
   变量 → 重置 → 排版 → 框架导航 → 页脚 → 通用组件 → 响应式 → 降级
   ========================================================================== */

:root{
  --gx-void:#060A1C;
  --gx-hull:#0E1738;
  --gx-rail:#2A3766;
  --gx-nebula:#6F4DF5;
  --gx-beam:#35E3D2;
  --gx-gold:#FFC24B;
  --gx-dust:#F5F7FF;
  --gx-mist:#9BA8CC;
  --gx-coral:#FF7A6B;

  --gx-frame:6px;
  --gx-gutter:20px;
  --gx-ease:cubic-bezier(.22,.61,.36,1);

  --gx-fs-12:.75rem;
  --gx-fs-14:.875rem;
  --gx-fs-16:1rem;
  --gx-fs-18:1.125rem;
  --gx-fs-24:1.5rem;
  --gx-fs-32:2rem;
  --gx-fs-48:3rem;
  --gx-fs-72:4.5rem;
  --gx-fs-96:6rem;

  --gx-font-display:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,sans-serif;
  --gx-font-body:var(--gx-font-display);
  --gx-font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --gx-shadow-hard:10px 22px 0 rgba(42,55,102,.55);
  --gx-progress:0%;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body,
h1,h2,h3,h4,h5,h6,
p,ul,ol,li,figure,blockquote,dl,dd,dt{
  margin:0;
}

ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
dl,dd{margin:0}

:where(a,button,[tabindex],summary):focus-visible{
  outline:3px solid var(--gx-beam);
  outline-offset:3px;
}

::selection{background:var(--gx-nebula);color:var(--gx-dust)}

/* ---------- 页面基底 ---------- */
body{
  margin:0;
  padding-inline:var(--gx-frame);
  background-color:var(--gx-void);
  background-image:
    radial-gradient(1.5px 1.5px at 20% 12%, rgba(245,247,255,.30), transparent 100%),
    radial-gradient(1.5px 1.5px at 72% 28%, rgba(53,227,210,.26), transparent 100%),
    radial-gradient(1.5px 1.5px at 44% 64%, rgba(245,247,255,.20), transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 76%, rgba(111,77,245,.30), transparent 100%),
    radial-gradient(1.5px 1.5px at 8% 88%, rgba(245,247,255,.18), transparent 100%);
  background-size:520px 520px,680px 680px,760px 760px,900px 900px,600px 600px;
  color:var(--gx-dust);
  font-family:var(--gx-font-body);
  font-size:var(--gx-fs-16);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#main-content{
  display:block;
  scroll-margin-top:110px;
}

/* ---------- 容器 ---------- */
.gx-shell{
  width:100%;
  max-width:1360px;
  margin-inline:auto;
  padding-inline:var(--gx-gutter);
}

/* ---------- 跳转链接 ---------- */
.gx-skip{
  position:fixed;
  top:10px;
  left:50%;
  z-index:999;
  padding:10px 20px;
  background:var(--gx-beam);
  color:var(--gx-void);
  font-size:var(--gx-fs-14);
  font-weight:600;
  letter-spacing:.06em;
  border:3px solid var(--gx-void);
  transform:translate(-50%,-260%);
  transition:transform 180ms var(--gx-ease);
}
.gx-skip:focus{
  transform:translate(-50%,0);
  outline:3px solid var(--gx-gold);
  outline-offset:2px;
}

/* ---------- 头部：框架式导航 ---------- */
.gx-header{
  position:sticky;
  top:0;
  z-index:200;
  background:linear-gradient(180deg,rgba(14,23,56,.97) 0%,rgba(6,10,28,.94) 100%);
  border-bottom:3px solid var(--gx-rail);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}

.gx-header[data-open]{
  border-bottom-color:var(--gx-gold);
}

/* 左右轨道线 + 滚动进度 */
.gx-rails{position:relative;z-index:60;pointer-events:none}

.gx-rails__line{
  position:fixed;
  top:0;
  bottom:0;
  width:var(--gx-frame);
  background:var(--gx-rail);
  z-index:60;
  pointer-events:none;
  overflow:hidden;
}
.gx-rails__line--start{left:0}
.gx-rails__line--end{right:0}

.gx-rails__line::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:var(--gx-progress);
  background:linear-gradient(180deg,var(--gx-beam) 0%,var(--gx-nebula) 100%);
  box-shadow:0 0 14px rgba(53,227,210,.55);
}

.gx-header__bar{
  position:relative;
  display:flex;
  align-items:center;
  gap:24px;
  min-height:82px;
}

/* 品牌 */
.gx-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--gx-dust);
}
.gx-brand__mark{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  flex:0 0 auto;
  color:var(--gx-beam);
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
  transition:color 180ms var(--gx-ease),border-color 180ms var(--gx-ease),box-shadow 180ms var(--gx-ease);
}
.gx-brand:hover .gx-brand__mark{
  color:var(--gx-gold);
  border-color:var(--gx-gold);
  box-shadow:0 0 20px rgba(255,194,75,.35);
}
.gx-brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.gx-brand__name{
  font-size:var(--gx-fs-18);
  font-weight:600;
  letter-spacing:.1em;
}
.gx-brand__tag{
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-mist);
}

/* 移动端栏目开关 */
.gx-nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  height:46px;
  padding:0 14px;
  margin-inline-start:auto;
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
  color:var(--gx-dust);
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  transition:color 180ms var(--gx-ease),border-color 180ms var(--gx-ease);
}
.gx-nav-toggle__bars{
  display:grid;
  gap:4px;
  width:18px;
}
.gx-nav-toggle__bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform 180ms var(--gx-ease),opacity 180ms var(--gx-ease);
}
.gx-header[data-open] .gx-nav-toggle{
  color:var(--gx-gold);
  border-color:var(--gx-gold);
}
.gx-header[data-open] .gx-nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.gx-header[data-open] .gx-nav-toggle__bars span:nth-child(2){opacity:0}
.gx-header[data-open] .gx-nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 导航面板 */
.gx-header__panel{
  display:flex;
  align-items:center;
  gap:20px;
  flex:1 1 auto;
  min-width:0;
}

.gx-nav{
  flex:1 1 auto;
  min-width:0;
}
.gx-nav__list{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:2px;
}
.gx-nav__item{position:relative}
.gx-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:9px 12px;
  color:var(--gx-mist);
  font-size:var(--gx-fs-14);
  letter-spacing:.08em;
  white-space:nowrap;
  transition:color 180ms var(--gx-ease),background-color 180ms var(--gx-ease);
}
.gx-nav__link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:center;
  transition:transform 180ms var(--gx-ease);
}
.gx-nav__link:hover,
.gx-nav__link:focus-visible{color:var(--gx-beam)}
.gx-nav__link:hover::after,
.gx-nav__link:focus-visible::after{transform:scaleX(1)}

.gx-nav__link[aria-current="page"]{
  color:var(--gx-gold);
  background:rgba(255,194,75,.07);
}
.gx-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--gx-gold);
  box-shadow:0 0 10px rgba(255,194,75,.7);
}

/* 次级工具 */
.gx-tools{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
}
.gx-tool{
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 13px;
  background:transparent;
  border:2px solid var(--gx-rail);
  color:var(--gx-mist);
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  white-space:nowrap;
  transition:color 180ms var(--gx-ease),border-color 180ms var(--gx-ease),background-color 180ms var(--gx-ease);
}
.gx-tool:hover{
  color:var(--gx-beam);
  border-color:var(--gx-beam);
  background:rgba(53,227,210,.07);
}
.gx-tool[aria-pressed="true"]{
  color:var(--gx-void);
  background:var(--gx-beam);
  border-color:var(--gx-beam);
}

/* 主行动入口 */
.gx-cta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  height:46px;
  padding:0 20px;
  background:var(--gx-gold);
  border:3px solid var(--gx-gold);
  color:#171004;
  font-size:var(--gx-fs-14);
  font-weight:600;
  letter-spacing:.06em;
  white-space:nowrap;
  box-shadow:6px 6px 0 rgba(111,77,245,.6);
  transition:transform 180ms var(--gx-ease),box-shadow 180ms var(--gx-ease),background-color 180ms var(--gx-ease),color 180ms var(--gx-ease);
}
.gx-cta__arrow{
  font-family:var(--gx-font-mono);
  transition:transform 180ms var(--gx-ease);
}
.gx-cta:hover{
  transform:translate(-2px,-2px);
  box-shadow:9px 9px 0 rgba(111,77,245,.85);
}
.gx-cta:hover .gx-cta__arrow{transform:translateX(4px)}
.gx-cta:active{
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 rgba(111,77,245,.85);
}

/* ---------- 页脚 ---------- */
.gx-footer{
  position:relative;
  margin-top:clamp(72px,10vw,140px);
  background:linear-gradient(180deg,var(--gx-hull) 0%,var(--gx-void) 100%);
  border-top:3px solid var(--gx-rail);
  color:var(--gx-mist);
}
.gx-footer::before{
  content:"";
  position:absolute;
  top:-3px;
  left:0;
  width:min(240px,38%);
  height:3px;
  background:linear-gradient(90deg,var(--gx-gold),var(--gx-nebula));
}

.gx-footer__top{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  padding-block:clamp(48px,7vw,72px) clamp(32px,5vw,48px);
}

.gx-footer__mark{
  font-size:var(--gx-fs-24);
  font-weight:300;
  letter-spacing:-.01em;
  color:var(--gx-dust);
  line-height:1.2;
}
.gx-footer__tag{
  margin-top:8px;
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-beam);
}
.gx-footer__note{
  margin-top:16px;
  max-width:32ch;
  font-size:var(--gx-fs-14);
  line-height:1.7;
  color:var(--gx-mist);
}

.gx-footer__nav{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:32px 24px;
}
.gx-footer__group-title{
  margin-bottom:14px;
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  font-weight:400;
  letter-spacing:.16em;
  color:var(--gx-gold);
}
.gx-footer__links{
  display:grid;
  gap:10px;
}
.gx-footer__link{
  display:inline-block;
  font-size:var(--gx-fs-14);
  color:var(--gx-mist);
  transition:color 180ms var(--gx-ease),transform 180ms var(--gx-ease);
}
.gx-footer__link:hover{
  color:var(--gx-dust);
  transform:translateX(5px);
}

.gx-footer__facts{
  display:grid;
  gap:12px;
}
.gx-footer__fact{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:12px;
  align-items:start;
  padding-bottom:12px;
  border-bottom:1px solid rgba(42,55,102,.75);
}
.gx-footer__fact:last-child{border-bottom:0;padding-bottom:0}
.gx-footer__fact-key{
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-mist);
}
.gx-footer__fact-val{
  font-size:var(--gx-fs-14);
  line-height:1.65;
  color:var(--gx-dust);
  word-break:break-word;
}

.gx-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 24px;
  padding-block:22px 40px;
  border-top:3px solid var(--gx-rail);
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.04em;
  color:var(--gx-mist);
}
.gx-footer__icp{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.gx-footer__copy{margin-inline-start:auto}

/* 回到顶部 */
.gx-top{
  position:fixed;
  right:calc(var(--gx-frame) + 14px);
  bottom:24px;
  z-index:180;
  width:50px;
  height:50px;
  display:grid;
  place-items:center;
  background:rgba(6,10,28,.92);
  border:3px solid var(--gx-beam);
  color:var(--gx-beam);
  font-size:var(--gx-fs-18);
  line-height:1;
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  transition:opacity 180ms var(--gx-ease),transform 180ms var(--gx-ease),visibility 180ms linear,background-color 180ms var(--gx-ease),color 180ms var(--gx-ease);
}
.gx-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.gx-top:hover{
  background:var(--gx-beam);
  color:var(--gx-void);
}

/* ---------- 通用文字层级 ---------- */
.gx-eyebrow{
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gx-beam);
}
.gx-display{
  font-size:clamp(var(--gx-fs-48),9vw,var(--gx-fs-96));
  font-weight:200;
  letter-spacing:-.02em;
  line-height:1.02;
  color:var(--gx-dust);
}
.gx-index{
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-mist);
}
.gx-lead{
  max-width:56ch;
  font-size:var(--gx-fs-18);
  line-height:1.75;
  color:var(--gx-mist);
}
.gx-prose{
  max-width:68ch;
  font-size:var(--gx-fs-18);
  line-height:1.75;
  color:var(--gx-mist);
}
.gx-prose p + p{margin-top:1.15em}
.gx-prose strong{color:var(--gx-dust);font-weight:600}
.gx-prose a{
  color:var(--gx-beam);
  box-shadow:inset 0 -2px 0 rgba(53,227,210,.45);
  transition:box-shadow 180ms var(--gx-ease),color 180ms var(--gx-ease);
}
.gx-prose a:hover{
  color:var(--gx-gold);
  box-shadow:inset 0 -2px 0 var(--gx-gold);
}

/* ---------- 章节 ---------- */
.gx-section{padding-block:clamp(40px,6vw,80px)}
.gx-section__head{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding-bottom:16px;
  margin-bottom:32px;
  border-bottom:3px solid var(--gx-rail);
}
.gx-section__num{
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-gold);
  flex:0 0 auto;
}
.gx-section__title{
  font-size:clamp(var(--gx-fs-24),4vw,var(--gx-fs-32));
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.2;
  color:var(--gx-dust);
}

/* ---------- 网格与卡片 ---------- */
.gx-grid{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}
.gx-card{
  position:relative;
  padding:24px;
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
  transition:transform 180ms var(--gx-ease),box-shadow 180ms var(--gx-ease),border-color 180ms var(--gx-ease);
}
.gx-card:hover{
  transform:translate(-3px,-3px);
  box-shadow:var(--gx-shadow-hard);
  border-color:var(--gx-nebula);
}
.gx-card__title{
  font-size:var(--gx-fs-18);
  font-weight:600;
  letter-spacing:.01em;
  color:var(--gx-dust);
}
.gx-card__body{
  margin-top:8px;
  font-size:var(--gx-fs-14);
  line-height:1.7;
  color:var(--gx-mist);
}

/* ---------- 图片容器 ---------- */
.gx-media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:linear-gradient(135deg,#0E1738 0%,#142057 46%,#1D1655 100%);
  border:3px solid var(--gx-rail);
}
.gx-media > img,
.gx-media > svg,
.gx-media > picture{
  width:100%;
  height:100%;
  object-fit:cover;
}
.gx-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(120% 90% at 16% 10%, rgba(111,77,245,.34), transparent 62%),
    radial-gradient(90% 80% at 88% 84%, rgba(53,227,210,.22), transparent 60%);
}
.gx-media--wide{aspect-ratio:21 / 9}
.gx-media--tall{aspect-ratio:4 / 5}
.gx-media--square{aspect-ratio:1 / 1}

/* ---------- 按钮 ---------- */
.gx-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:50px;
  padding:0 24px;
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
  color:var(--gx-dust);
  font-size:var(--gx-fs-14);
  font-weight:600;
  letter-spacing:.06em;
  transition:transform 180ms var(--gx-ease),box-shadow 180ms var(--gx-ease),color 180ms var(--gx-ease),border-color 180ms var(--gx-ease),background-color 180ms var(--gx-ease);
}
.gx-btn:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 var(--gx-rail);
  border-color:var(--gx-beam);
  color:var(--gx-beam);
}
.gx-btn--gold{
  background:var(--gx-gold);
  border-color:var(--gx-gold);
  color:#171004;
}
.gx-btn--gold:hover{
  color:#171004;
  border-color:var(--gx-gold);
  box-shadow:8px 8px 0 rgba(111,77,245,.75);
}
.gx-btn--ghost{
  background:transparent;
  border-color:var(--gx-beam);
  color:var(--gx-beam);
}
.gx-btn--ghost:hover{
  background:rgba(53,227,210,.08);
  box-shadow:6px 6px 0 rgba(53,227,210,.35);
}

/* ---------- 面包屑 ---------- */
.gx-crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:20px;
  font-family:var(--gx-font-mono);
  font-size:var(--gx-fs-12);
  letter-spacing:.08em;
  color:var(--gx-mist);
}
.gx-crumbs__item{
  color:var(--gx-mist);
  transition:color 180ms var(--gx-ease);
}
.gx-crumbs__item:hover{color:var(--gx-beam)}
.gx-crumbs__item[aria-current="page"]{color:var(--gx-dust)}
.gx-crumbs__sep{color:var(--gx-rail)}

/* ---------- 分段切换器 ---------- */
.gx-tabs{display:block}
.gx-tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  padding:4px;
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
}
.gx-tabs__tab{
  flex:1 1 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 18px;
  color:var(--gx-mist);
  font-size:var(--gx-fs-14);
  letter-spacing:.06em;
  transition:color 180ms var(--gx-ease),background-color 180ms var(--gx-ease);
}
.gx-tabs__tab:hover{color:var(--gx-beam)}
.gx-tabs__tab[aria-selected="true"]{
  background:var(--gx-nebula);
  color:var(--gx-dust);
}
.gx-tabs__panel{padding-top:24px}
.gx-tabs__panel[hidden]{display:none}

/* ---------- 折叠卡片 ---------- */
.gx-acc{display:grid;gap:12px}
.gx-acc__item{
  background:var(--gx-hull);
  border:3px solid var(--gx-rail);
}
.gx-acc__trigger{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  color:var(--gx-dust);
  font-size:var(--gx-fs-16);
  font-weight:600;
  transition:background-color 180ms var(--gx-ease),color 180ms var(--gx-ease);
}
.gx-acc__trigger:hover{
  background:rgba(111,77,245,.14);
  color:var(--gx-beam);
}
.gx-acc__trigger::after{
  content:"";
  flex:0 0 auto;
  width:10px;
  height:10px;
  border-right:2px solid currentColor;
  border-bottom:2px solid currentColor;
  transform:rotate(45deg);
  transition:transform 260ms var(--gx-ease);
}
.gx-acc__trigger[aria-expanded="true"]::after{transform:rotate(-135deg)}
.gx-acc__panel{
  overflow:hidden;
  max-height:0;
  padding-inline:20px;
  font-size:var(--gx-fs-14);
  line-height:1.75;
  color:var(--gx-mist);
  transition:max-height 260ms var(--gx-ease);
}
.gx-acc__panel > *:last-child{padding-bottom:20px}
.gx-acc__panel p + p{margin-top:.9em}

/* ---------- 滚动显现 ---------- */
.gx-reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity 420ms var(--gx-ease),transform 420ms var(--gx-ease);
}
.gx-reveal[data-shown]{
  opacity:1;
  transform:none;
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  :root{--gx-gutter:32px}
}

@media (min-width:1000px){
  :root{--gx-gutter:48px}
  .gx-footer__top{
    grid-template-columns:minmax(220px,1fr) minmax(0,1.6fr) minmax(260px,1.15fr);
    gap:48px;
  }
}

@media (min-width:1200px){
  :root{--gx-gutter:64px}
}

@media (max-width:1280px){
  .gx-header__bar{gap:16px}
  .gx-nav__link{padding:9px 8px}
  .gx-nav__link::after{left:8px;right:8px}
  .gx-tool{padding:0 10px}
}

@media (max-width:1080px){
  .gx-header__bar{
    gap:12px;
    min-height:72px;
  }
  .gx-nav-toggle{display:inline-flex}
  .gx-brand__tag{display:none}
  .gx-brand__mark{width:42px;height:42px}

  .gx-header__panel{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:linear-gradient(180deg,rgba(14,23,56,.99) 0%,rgba(6,10,28,.99) 100%);
    border-bottom:3px solid var(--gx-rail);
    transition:max-height 260ms var(--gx-ease),visibility 260ms linear;
  }
  .gx-header[data-open] .gx-header__panel{
    max-height:calc(100vh - 78px);
    overflow-y:auto;
    visibility:visible;
    border-bottom-color:var(--gx-gold);
  }

  .gx-nav{width:100%}
  .gx-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .gx-nav__link{
    justify-content:flex-start;
    padding:16px 22px;
    font-size:var(--gx-fs-16);
    border-bottom:1px solid rgba(42,55,102,.65);
  }
  .gx-nav__link::after{display:none}
  .gx-nav__link[aria-current="page"]{
    background:rgba(255,194,75,.08);
    box-shadow:inset 3px 0 0 var(--gx-gold);
  }

  .gx-tools{
    flex-direction:row;
    flex-wrap:wrap;
    gap:8px;
    padding:16px 22px 0;
  }
  .gx-tool{height:42px}

  .gx-cta{
    display:flex;
    justify-content:center;
    margin:16px 22px 24px;
    height:54px;
    font-size:var(--gx-fs-16);
  }
}

@media (max-width:600px){
  .gx-header__bar{min-height:66px}
  .gx-brand__name{font-size:var(--gx-fs-16)}
  .gx-nav-toggle{padding:0 11px;height:42px}
  .gx-nav-toggle__text{display:none}
  .gx-footer__base{flex-direction:column;align-items:flex-start;gap:8px}
  .gx-footer__copy{margin-inline-start:0}
  .gx-top{width:44px;height:44px;bottom:18px;right:calc(var(--gx-frame) + 10px)}
  .gx-acc__trigger{font-size:var(--gx-fs-14);padding:16px}
  .gx-acc__panel{padding-inline:16px}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:120ms !important;
  }
  .gx-reveal{opacity:1;transform:none}
  .gx-top{transform:none;visibility:visible}
  .gx-btn:hover,
  .gx-card:hover,
  .gx-cta:hover,
  .gx-cta:active,
  .gx-footer__link:hover{transform:none}
  .gx-nav__link::after{transform:none}
  .gx-cta:hover .gx-cta__arrow{transform:none}
}