/* ==========================================================================
   银河中心 · 共享样式 /assets/site.css
   深空底 + 银河紫锚点 + 框架式导航 + 非对称编辑部版式
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --c-deep:#05070F;
  --c-deep-2:#0B1020;
  --c-glass:#151B30;
  --c-violet:#6C4DFF;
  --c-violet-soft:#B79CFF;
  --c-nebula:#FF7AC8;
  --c-aurora:#35E0B0;
  --c-orange:#FFB454;
  --c-white:#E9EDF8;
  --c-grey:#99A2BD;
  --c-orbit:#2A3350;

  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --edge:clamp(16px,4.2vw,60px);
  --shell:1320px;
  --gap:clamp(16px,2vw,32px);
  --band:clamp(64px,9vw,96px);
  --t-fast:160ms;
  --t-draw:180ms;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}

body{
  margin:0;
  min-height:100vh;
  padding-inline:calc(var(--edge) + 1px);
  background:var(--c-deep);
  color:var(--c-white);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* 全站页框：左右两条轨道竖线，导航即边框的一部分 */
body::before,
body::after{
  content:"";
  position:fixed;
  top:0;
  bottom:0;
  width:1px;
  z-index:45;
  pointer-events:none;
  background:linear-gradient(180deg,
    rgba(42,51,80,.2) 0%,
    var(--c-orbit) 10%,
    var(--c-orbit) 90%,
    rgba(42,51,80,.2) 100%);
}
body::before{left:var(--edge)}
body::after{right:var(--edge)}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;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,picture,svg,video{display:block;max-width:100%}
[hidden]{display:none !important}

:focus-visible{outline:2px solid var(--c-violet-soft);outline-offset:3px}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3{font-weight:300;line-height:1.14;letter-spacing:.05em}
h1{font-size:clamp(2.6rem,6vw,5.4rem);line-height:1.05;letter-spacing:.06em}
h2{font-size:clamp(1.6rem,2.6vw,2.4rem)}
h3{font-size:clamp(1.16rem,1.6vw,1.4rem);font-weight:400;letter-spacing:.04em}
h4{font-size:1rem;font-weight:400;letter-spacing:.06em}

.mono,.idx{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}
.idx{
  display:inline-block;
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--c-grey);
}

#main-content{display:block;min-height:40vh}

/* ---------- 4. 页头 ---------- */
.skip-link{
  position:fixed;
  left:var(--edge);
  top:-120px;
  z-index:90;
  padding:10px 18px;
  background:var(--c-violet);
  color:#FFFFFF;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.14em;
  transition:top var(--t-fast) ease;
}
.skip-link:focus{top:12px}

.scroll-trace{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:70;
  pointer-events:none;
}
.scroll-trace__fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--c-violet),var(--c-nebula));
}

.gw-header{
  position:sticky;
  top:0;
  z-index:40;
  margin-inline:calc(-1 * (var(--edge) + 1px));
  padding-inline:calc(var(--edge) + 1px);
  background:rgba(5,7,15,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--c-orbit);
}
.gw-header::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:var(--c-orbit);
}

.gw-header__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
}

.gw-header__top{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  padding-block:12px;
  border-bottom:1px solid rgba(42,51,80,.6);
}

.gw-header__bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--gap);
  padding-block:8px;
}

.gw-header__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}

/* 品牌字标 */
.brand-lockup{
  display:inline-flex;
  align-items:baseline;
  gap:.55rem;
  order:1;
  color:var(--c-white);
}
.brand-lockup__mark{
  font-size:clamp(1rem,1.35vw,1.2rem);
  font-weight:500;
  letter-spacing:.34em;
  padding-right:.06em;
}
.brand-lockup__sub{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.26em;
  color:var(--c-grey);
  border-left:1px solid var(--c-orbit);
  padding-left:.6rem;
}
.brand-lockup:hover .brand-lockup__sub{color:var(--c-violet-soft)}
.brand-lockup--footer .brand-lockup__mark{font-size:1rem;letter-spacing:.3em}

/* 更新时间刻度 */
.update-gauge{
  order:2;
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.update-gauge__track{
  display:block;
  position:relative;
  flex:0 0 auto;
  width:clamp(56px,9vw,132px);
  height:2px;
  background:var(--c-orbit);
  overflow:hidden;
}
.update-gauge__fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--c-violet),var(--c-violet-soft) 62%,var(--c-nebula));
  transition:width 600ms linear;
}
.update-gauge__meta{
  display:flex;
  align-items:baseline;
  gap:.5rem;
  min-width:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--c-grey);
  white-space:nowrap;
}
.update-gauge__label{color:var(--c-grey)}
.update-gauge__stamp{color:var(--c-white)}
.update-gauge__sep{color:var(--c-orbit)}
.update-gauge__version{color:var(--c-violet-soft)}

.update-gauge__copy{
  flex:none;
  padding:3px 9px;
  border:1px solid var(--c-orbit);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  color:var(--c-grey);
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.update-gauge__copy:hover{color:var(--c-violet-soft);border-color:var(--c-violet-soft)}
.update-gauge__copy[data-copied]{color:var(--c-aurora);border-color:var(--c-aurora)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  order:2;
  margin-left:auto;
  padding:8px 12px;
  border:1px solid var(--c-orbit);
  color:var(--c-white);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.nav-toggle:hover{color:var(--c-violet-soft);border-color:var(--c-violet-soft)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform var(--t-fast) ease;
}
.gw-header[data-open] .nav-toggle__bars span:first-child{transform:translateY(2.5px) rotate(45deg)}
.gw-header[data-open] .nav-toggle__bars span:last-child{transform:translateY(-2.5px) rotate(-45deg)}

/* 框架导航 */
.frame-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(10px,2.2vw,28px);
}
.frame-nav__link{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.18em;
  color:var(--c-grey);
  transition:color var(--t-fast) ease;
}
.frame-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:2px;
  width:100%;
  height:1px;
  background:var(--c-violet-soft);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t-draw) ease;
}
.frame-nav__link:hover{color:var(--c-white)}
.frame-nav__link:hover::after{transform:scaleX(1)}
.frame-nav__link[aria-current="page"]{color:var(--c-white)}
.frame-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--c-violet)}
.frame-nav__link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:-11px;
  top:50%;
  width:2px;
  height:14px;
  margin-top:-7px;
  background:var(--c-violet);
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:10px 18px;
  border:1px solid var(--c-orbit);
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.16em;
  white-space:nowrap;
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease,background-color var(--t-fast) ease;
}
.btn--primary{
  background:var(--c-violet);
  border-color:var(--c-violet);
  color:#FFFFFF;
}
.btn--primary:hover{background:#7C60FF;border-color:var(--c-violet-soft)}
.btn--ghost{color:var(--c-grey)}
.btn--ghost:hover{color:var(--c-white);border-color:var(--c-violet-soft)}

/* ---------- 6. 页脚 ---------- */
.gw-footer{
  margin-top:var(--band);
  margin-inline:calc(-1 * (var(--edge) + 1px));
  padding-inline:calc(var(--edge) + 1px);
  background:var(--c-deep-2);
  border-top:1px solid var(--c-orbit);
}
.gw-footer__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-block:clamp(40px,6vw,72px) clamp(28px,4vw,44px);
}
.gw-footer__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 24px;
  padding-bottom:clamp(22px,3vw,36px);
  border-bottom:1px solid var(--c-orbit);
}
.gw-footer__stamp{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--c-grey);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--gap);
  padding-top:clamp(26px,3.6vw,46px);
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:400;
  letter-spacing:.22em;
  color:var(--c-grey);
}
.footer-col__links{display:grid;gap:10px}
.footer-col__links a{
  font-size:.92rem;
  color:var(--c-white);
  opacity:.84;
  transition:color var(--t-fast) ease,opacity var(--t-fast) ease;
}
.footer-col__links a:hover{color:var(--c-violet-soft);opacity:1}
.footer-col__lines{display:grid;gap:8px}
.footer-col__line{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  line-height:1.9;
  color:var(--c-grey);
  word-break:break-word;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(30px,4vw,52px);
  padding-top:20px;
  border-top:1px solid var(--c-orbit);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--c-grey);
}
.footer-legal__note{color:rgba(153,162,189,.72)}

/* ---------- 7. 通用组件 ---------- */
.orbit-rule{
  position:relative;
  height:1px;
  margin-block:clamp(30px,4.6vw,54px);
  background:var(--c-orbit);
}
.orbit-rule::before,
.orbit-rule::after{
  content:"";
  position:absolute;
  top:-3px;
  width:1px;
  height:7px;
  background:var(--c-orbit);
}
.orbit-rule::before{left:0}
.orbit-rule::after{right:0}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem;
  padding-top:clamp(22px,3.6vw,42px);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--c-grey);
}
.breadcrumb__link{transition:color var(--t-fast) ease}
.breadcrumb__link:hover{color:var(--c-violet-soft)}
.breadcrumb__sep{color:var(--c-orbit)}
.breadcrumb__current{color:var(--c-white)}

.prose{
  max-width:38em;
  font-size:1rem;
  line-height:1.85;
  color:#CDD5E9;
}
.prose p + p{margin-top:1.05em}
.prose h2{margin-top:1.6em;margin-bottom:.6em}
.prose h3{margin-top:1.4em;margin-bottom:.5em}
.prose ul,
.prose ol{margin-top:.8em;display:grid;gap:.5em}
.prose ul li{padding-left:1.25em;position:relative}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:8px;
  height:1px;
  background:var(--c-violet-soft);
}
.prose a{
  color:var(--c-violet-soft);
  border-bottom:1px solid rgba(183,156,255,.42);
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.prose a:hover{color:var(--c-white);border-color:var(--c-white)}
.prose strong{color:var(--c-white);font-weight:500}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.col-note{grid-column:span 3}
.col-main{grid-column:span 9}
.col-wide{grid-column:1 / -1}
.col-half{grid-column:span 6}
.col-third{grid-column:span 4}

.band{padding-block:var(--band)}
.band--tight{padding-block:clamp(40px,5vw,64px)}

.glass-panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:rgba(21,27,48,.45);
  border:1px solid var(--c-orbit);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:border-color var(--t-fast) ease,background-color var(--t-fast) ease;
}
.glass-panel:hover{border-color:var(--c-violet-soft);background:rgba(21,27,48,.6)}

/* 图片容器：深空渐变 + 星点底纹，可在页面阶段直接放占位 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--c-orbit);
  background:
    radial-gradient(120% 92% at 78% 16%,rgba(108,77,255,.24),transparent 62%),
    radial-gradient(92% 72% at 12% 84%,rgba(255,122,200,.13),transparent 60%),
    linear-gradient(168deg,#05070F 0%,#0B1020 58%,#151B30 100%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(circle at 18% 26%,rgba(233,237,248,.75) 0 1.4px,transparent 1.4px),
    radial-gradient(circle at 62% 14%,rgba(183,156,255,.7) 0 1px,transparent 1px),
    radial-gradient(circle at 84% 62%,rgba(233,237,248,.5) 0 1px,transparent 1px),
    radial-gradient(circle at 42% 76%,rgba(255,122,200,.5) 0 1.6px,transparent 1.6px),
    radial-gradient(circle at 30% 52%,rgba(53,224,176,.45) 0 1px,transparent 1px);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:12px 16px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--c-grey);
  background:linear-gradient(0deg,rgba(5,7,15,.94),rgba(5,7,15,0));
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:3px 9px;
  border:1px solid var(--c-orbit);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.16em;
  color:var(--c-grey);
}
.tag--season{color:var(--c-nebula);border-color:rgba(255,122,200,.5)}
.tag--update{color:var(--c-orange);border-color:rgba(255,180,84,.5)}
.tag--state{color:var(--c-aurora);border-color:rgba(53,224,176,.5)}

/* 右侧轨道刻度锚点 */
.orbit-toc{
  position:fixed;
  right:calc(var(--edge) + 20px);
  top:50%;
  transform:translateY(-50%);
  z-index:30;
  display:none;
}
.orbit-toc__list{display:grid;gap:14px}
.orbit-toc__item{display:block}
.orbit-toc__link{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  color:var(--c-grey);
  transition:color var(--t-fast) ease;
}
.orbit-toc__mark{
  order:2;
  display:block;
  width:16px;
  height:1px;
  background:var(--c-orbit);
  transition:width var(--t-fast) ease,background-color var(--t-fast) ease;
}
.orbit-toc__label{order:1;white-space:nowrap}
.orbit-toc__link:hover{color:var(--c-white)}
.orbit-toc__link.is-active{color:var(--c-violet-soft)}
.orbit-toc__link.is-active .orbit-toc__mark{width:30px;background:var(--c-violet)}

/* 变更筛选 */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}
.filter-chip{
  padding:6px 13px;
  border:1px solid var(--c-orbit);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  color:var(--c-grey);
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease,background-color var(--t-fast) ease;
}
.filter-chip:hover{color:var(--c-white);border-color:var(--c-violet-soft)}
.filter-chip.is-active{
  color:#FFFFFF;
  background:var(--c-violet);
  border-color:var(--c-violet);
}

/* ---------- 8. 响应式 ---------- */
@media (min-width:1280px){
  .orbit-toc{display:block}
}

@media (max-width:1024px){
  .col-note{grid-column:span 4}
  .col-main{grid-column:span 8}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:calc(var(--gap) * 1.2)}
}

@media (max-width:900px){
  html{scroll-padding-top:170px}

  .nav-toggle{display:inline-flex}

  .update-gauge{
    order:3;
    flex:1 0 100%;
    margin-left:0;
    flex-wrap:wrap;
    gap:10px;
  }
  .update-gauge__track{flex:1 1 80px;width:auto;min-width:56px}
  .update-gauge__copy{margin-left:auto}

  .gw-header__bar{
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding-block:4px 18px;
    border-top:1px solid var(--c-orbit);
  }
  .gw-header[data-open] .gw-header__bar{display:flex}

  .frame-nav{width:100%}
  .frame-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .frame-nav__item + .frame-nav__item{border-top:1px solid rgba(42,51,80,.55)}
  .frame-nav__link{
    display:block;
    padding:13px 0 13px 12px;
    border-left:2px solid transparent;
    font-size:.82rem;
    letter-spacing:.2em;
  }
  .frame-nav__link::after{display:none}
  .frame-nav__link[aria-current="page"]{
    color:var(--c-white);
    border-left-color:var(--c-violet);
  }
  .frame-nav__link[aria-current="page"]::before{
    left:0;
    width:3px;
    height:16px;
    margin-top:-8px;
    background:transparent;
  }

  .gw-header__actions{
    flex-direction:column;
    align-items:stretch;
    margin-top:16px;
  }
}

@media (max-width:720px){
  body{font-size:16px}
  .col-note,
  .col-main,
  .col-half,
  .col-third{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr}
  .gw-footer__head{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .update-gauge__label{display:none}
  .update-gauge__meta{font-size:.68rem;letter-spacing:.1em}
  .frame-nav__link{font-size:.78rem}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

/* ---------- 9. 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:.01ms !important;
    transition-delay:0ms !important;
  }
  .update-gauge__fill{transition:none}
  .frame-nav__link::after{transition:none}
}