/* ==========================================================================
   银河澳门官网 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

:root{
  --ink-deep:#060B22;
  --nebula:#5A3CC4;
  --galaxy:#2B1A63;
  --cyan:#35E0D6;
  --gold:#F2B250;
  --paper:#F4EDE0;
  --paper-shade:#E1D6C1;
  --ink:#131622;
  --star:#F7F9FF;
  --bay:#2E6FB7;

  --star-92:rgba(247,249,255,.92);
  --star-70:rgba(247,249,255,.70);
  --star-45:rgba(247,249,255,.45);
  --ink-88:rgba(19,22,34,.88);
  --ink-62:rgba(19,22,34,.62);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --r-panel:28px;
  --r-card:18px;
  --r-pill:999px;
  --shell:1240px;
  --gutter:clamp(18px,4.5vw,48px);

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.4s;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body{margin:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,select,textarea{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0}
[hidden]{display:none !important}

:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:10px;
}

/* ---------- 中文排版与星云底 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--star);
  background-color:var(--ink-deep);
  background-image:
    radial-gradient(900px 620px at 10% -6%, rgba(90,60,196,.55), transparent 66%),
    radial-gradient(720px 520px at 94% 8%, rgba(53,224,214,.14), transparent 62%),
    radial-gradient(1100px 760px at 62% 104%, rgba(43,26,99,.92), transparent 72%),
    linear-gradient(180deg,#060B22 0%,#080d28 55%,#060B22 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.5;
  background-image:
    radial-gradient(1.6px 1.6px at 18px 28px, rgba(247,249,255,.55), transparent 70%),
    radial-gradient(1.2px 1.2px at 132px 96px, rgba(53,224,214,.45), transparent 70%),
    radial-gradient(1.8px 1.8px at 248px 188px, rgba(242,178,80,.40), transparent 70%),
    radial-gradient(1px 1px at 322px 62px, rgba(247,249,255,.38), transparent 70%),
    radial-gradient(1.2px 1.2px at 74px 214px, rgba(247,249,255,.30), transparent 70%);
  background-size:360px 260px;
}

p,li{max-width:66ch;text-wrap:pretty}
.display,.h-section,.h-card,.lead{text-wrap:balance}

/* ---------- 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.narrow{max-width:760px}
#main-content{
  position:relative;
  z-index:1;
  padding-top:clamp(112px,12vw,164px);
}

/* ---------- 通用排版元件 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.12;
  font-size:clamp(2.6rem,7vw,5.4rem);
}
.h-section{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.2;
  font-size:clamp(1.8rem,3.6vw,2.8rem);
}
.h-card{
  font-size:1.15rem;
  font-weight:700;
  line-height:1.4;
  letter-spacing:.005em;
}
.lead{font-size:clamp(1.02rem,1.5vw,1.18rem);line-height:1.7;color:var(--star-70)}
.meta{font-size:.875rem;line-height:1.6;color:var(--star-70)}
.muted{color:var(--star-70)}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
  max-width:none;
}
.section-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(2.6rem,7vw,4.6rem);
  line-height:.95;
  letter-spacing:-.05em;
  color:var(--gold);
}
.divider{
  height:1px;
  border:0;
  margin:clamp(20px,3vw,36px) 0;
  background:linear-gradient(90deg,rgba(53,224,214,.55),rgba(242,178,80,.35),transparent);
}
.link-inline{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(53,224,214,.42);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.link-inline:hover{border-bottom-color:var(--cyan);color:#8ef4ee}
.stat{display:flex;flex-direction:column;gap:.2em;max-width:none}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--gold);
}
.stat__label{font-size:.8rem;letter-spacing:.1em;color:var(--star-45)}

/* ---------- 堆叠画板 ---------- */
.panel{
  position:relative;
  border-radius:var(--r-panel);
  padding:clamp(24px,4vw,52px);
  background:linear-gradient(160deg,var(--paper) 0%,#EFE6D6 100%);
  color:var(--ink);
  box-shadow:0 46px 90px -60px rgba(0,0,0,.95),inset 0 0 0 1px rgba(255,255,255,.35);
}
.panel p,.panel li{color:var(--ink-88)}
.panel .muted{color:var(--ink-62)}
.panel .lead{color:var(--ink-88)}
.panel .eyebrow{color:var(--nebula)}
.panel .link-inline{color:#2A5FA8;border-bottom-color:rgba(46,111,183,.4)}
.panel .divider{background:linear-gradient(90deg,rgba(90,60,196,.5),rgba(46,111,183,.35),transparent)}
.panel--deep{
  background:linear-gradient(150deg,#1B1246 0%,var(--galaxy) 58%,#120B2E 100%);
  color:var(--star);
  border:1px solid rgba(90,60,196,.5);
  box-shadow:0 46px 90px -60px rgba(0,0,0,.95),inset 0 0 0 1px rgba(53,224,214,.08);
}
.panel--deep p,.panel--deep li{color:var(--star-70)}
.panel--deep .lead{color:var(--star-70)}
.panel--deep .eyebrow{color:var(--cyan)}
.panel--deep .section-num{color:var(--cyan)}
.panel-stack{display:grid;gap:clamp(26px,4vw,52px)}
.panel-stack--offset > *:nth-child(even){margin-inline-start:clamp(0px,4vw,72px)}
@media (max-width:860px){
  .panel{border-radius:18px}
  .panel-stack--offset > *:nth-child(even){margin-inline-start:0}
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
@media (max-width:1024px){
  .col-4,.col-8{grid-column:span 12}
  .col-6{grid-column:span 6}
}
@media (max-width:720px){
  .col-6{grid-column:span 12}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.62em 1.2em;
  border-radius:var(--r-pill);
  font-size:.9rem;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--gold{
  background:linear-gradient(120deg,var(--gold),#F7CB82);
  color:#241703;
  box-shadow:0 14px 30px -18px rgba(242,178,80,.95);
}
.btn--gold:hover{box-shadow:0 18px 34px -16px rgba(242,178,80,1)}
.btn--ghost{
  border-color:rgba(247,249,255,.3);
  color:var(--star-92);
  background:rgba(247,249,255,.04);
}
.btn--ghost:hover{border-color:var(--cyan);color:#9df5ef;background:rgba(53,224,214,.1)}
.btn--cyan{background:var(--cyan);color:#04141a}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  border-radius:22px;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,#1B1246,#0A1030);
  isolation:isolate;
}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--paper{background:linear-gradient(140deg,var(--paper-shade),var(--paper))}
.media img{width:100%;height:100%;object-fit:cover;object-position:center}
.media__placeholder{
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(1.5px 1.5px at 24px 32px, rgba(247,249,255,.45), transparent 70%),
    radial-gradient(1.2px 1.2px at 168px 120px, rgba(53,224,214,.4), transparent 70%),
    radial-gradient(140px 90px at 75% 20%, rgba(90,60,196,.5), transparent 70%),
    radial-gradient(220px 160px at 20% 100%, rgba(242,178,80,.18), transparent 70%);
  background-size:240px 200px,240px 200px,100% 100%,100% 100%;
}
.media__caption{
  position:absolute;
  inset:auto 0 0 0;
  padding:16px 18px;
  font-size:.8rem;
  line-height:1.5;
  color:rgba(247,249,255,.88);
  background:linear-gradient(transparent,rgba(6,11,34,.9));
}
.media-grid{display:grid;gap:clamp(12px,2vw,22px);grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.06em;
  color:var(--star-45);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  max-width:none;
  margin-bottom:clamp(18px,3vw,30px);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.5em}
.breadcrumbs a{text-decoration:none;color:inherit;transition:color var(--dur) var(--ease)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs li+li::before{content:"/";margin-inline-end:.5em;color:rgba(247,249,255,.28)}
.breadcrumbs [aria-current="page"]{color:var(--star)}
.panel .breadcrumbs{color:var(--ink-62)}
.panel .breadcrumbs [aria-current="page"]{color:var(--ink)}
.panel .breadcrumbs li+li::before{color:rgba(19,22,34,.3)}

/* ---------- 章节刻度目录 ---------- */
.rail{
  display:none;
  position:fixed;
  left:clamp(10px,1.8vw,26px);
  top:50%;
  transform:translateY(-50%);
  z-index:60;
  max-width:none;
}
@media (min-width:1280px){.rail{display:block}}
.rail-link{
  display:block;
  padding:7px 0;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  text-decoration:none;
  color:var(--star-45);
  transition:color var(--dur) var(--ease);
}
.rail-link::before{
  content:"";
  display:inline-block;
  width:16px;
  height:1px;
  margin-inline-end:8px;
  vertical-align:middle;
  background:currentColor;
  transition:width var(--dur) var(--ease);
}
.rail-link:hover{color:var(--star-92)}
.rail-link[aria-current="true"]{color:var(--gold)}
.rail-link[aria-current="true"]::before{width:30px}

/* ---------- 技能树 ---------- */
.tree{display:grid;gap:12px}
.tree-node{
  position:relative;
  padding:18px 20px 18px 54px;
  border-radius:var(--r-card);
  background:rgba(247,249,255,.05);
  border:1px solid rgba(90,60,196,.42);
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.tree-node::before{
  content:"";
  position:absolute;
  left:22px;
  top:26px;
  width:11px;
  height:11px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 6px rgba(53,224,214,.14);
}
.tree-node__title{font-weight:600;font-size:1.02rem;color:var(--star-92);max-width:none}
.tree-node__body{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--dur) var(--ease)}
.tree-node__body > div{overflow:hidden}
.tree-node__desc{font-size:.9rem;color:var(--star-70);padding-top:8px}
.tree-node:hover,.tree-node:focus-within{
  background:rgba(53,224,214,.09);
  border-color:rgba(53,224,214,.6);
  transform:translateX(6px);
}
.tree-node:hover .tree-node__body,.tree-node:focus-within .tree-node__body{grid-template-rows:1fr}

/* ---------- 折叠面板 ---------- */
.accordion{border-top:1px solid rgba(53,224,214,.22)}
.accordion__item{border-bottom:1px solid rgba(53,224,214,.22)}
.accordion__trigger{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:18px 0;
  text-align:left;
  font-size:1.02rem;
  font-weight:600;
  color:var(--star-92);
  transition:color var(--dur) var(--ease);
}
.accordion__trigger::after{
  content:"+";
  flex:none;
  font-family:var(--font-mono);
  font-size:1.2rem;
  line-height:1.2;
  color:var(--gold);
}
.accordion__item[data-open="true"] .accordion__trigger::after{content:"–"}
.accordion__trigger:hover{color:var(--cyan)}
.accordion__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--dur) var(--ease)}
.accordion__panel > div{overflow:hidden}
.accordion__item[data-open="true"] .accordion__panel{grid-template-rows:1fr}
.accordion__panel p{padding-bottom:20px;font-size:.96rem;color:var(--star-70)}
.panel .accordion{border-top-color:rgba(19,22,34,.18)}
.panel .accordion__item{border-bottom-color:rgba(19,22,34,.18)}
.panel .accordion__trigger{color:var(--ink)}
.panel .accordion__trigger::after{color:var(--nebula)}
.panel .accordion__panel p{color:var(--ink-62)}

/* ---------- 标签胶囊 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.42em 1em;
  border-radius:var(--r-pill);
  font-size:.82rem;
  line-height:1.3;
  text-decoration:none;
  border:1px solid rgba(247,249,255,.28);
  color:var(--star-70);
  background:rgba(247,249,255,.04);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--cyan);color:#9df5ef}
.chip--cyan{color:var(--cyan);border-color:rgba(53,224,214,.45);background:rgba(53,224,214,.08)}
.chip--gold{color:var(--gold);border-color:rgba(242,178,80,.45);background:rgba(242,178,80,.08)}
.chip[aria-pressed="true"],.chip.is-active{
  background:var(--cyan);
  border-color:transparent;
  color:#04141a;
  font-weight:600;
}
.panel .chip{border-color:rgba(19,22,34,.2);color:var(--ink-62);background:rgba(19,22,34,.03)}
.panel .chip[aria-pressed="true"]{background:var(--nebula);color:#fff;border-color:transparent}

/* ---------- 显现动画 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease-out,transform .5s ease-out;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ==========================================================================
   头部：悬浮胶囊导航
   ========================================================================== */
.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  z-index:200;
  transform:translate(-50%,-180%);
  padding:.7em 1.3em;
  border-radius:var(--r-pill);
  background:var(--gold);
  color:#241703;
  font-weight:700;
  text-decoration:none;
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  padding:18px clamp(12px,3vw,34px) 0;
  transition:transform var(--dur) var(--ease),padding var(--dur) var(--ease);
}
.header-inner{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:16px;
  padding:10px 12px 10px 18px;
  border-radius:var(--r-pill);
  background:linear-gradient(120deg,rgba(24,16,62,.88),rgba(6,11,34,.82));
  border:1px solid rgba(90,60,196,.5);
  box-shadow:0 22px 46px -30px rgba(0,0,0,.95),inset 0 1px 0 rgba(247,249,255,.07);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:padding var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--star);
  flex:none;
  max-width:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:none;
  border-radius:50%;
  background:radial-gradient(circle at 30% 24%,rgba(90,60,196,.95),rgba(6,11,34,.95));
  box-shadow:0 0 0 1px rgba(53,224,214,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.14;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.02rem;
  letter-spacing:.01em;
  color:var(--star);
  white-space:nowrap;
}
.brand-line{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.13em;
  color:var(--star-45);
  white-space:nowrap;
  max-height:16px;
  overflow:hidden;
  transition:opacity var(--dur) var(--ease),max-height var(--dur) var(--ease);
}

/* 桌面导航 */
.site-nav{display:flex;align-items:center;gap:6px;margin-inline-start:auto;max-width:none}
.nav-list{display:flex;align-items:center;gap:2px;max-width:none}
.nav-item{max-width:none}
.nav-link{
  display:inline-block;
  padding:.5em 1em;
  border-radius:var(--r-pill);
  font-size:.9rem;
  text-decoration:none;
  color:var(--star-70);
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-link:hover{background:rgba(90,60,196,.42);color:var(--star)}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  color:#04141a;
  font-weight:700;
  box-shadow:0 10px 26px -14px rgba(53,224,214,.95);
}
.nav-more,.nav-tools{display:none}

/* 桌面工具区 */
.header-tools{display:flex;align-items:center;gap:10px;flex:none;margin-inline-start:8px}
.header-tool{
  font-size:.86rem;
  text-decoration:none;
  color:var(--star-70);
  padding:.4em .6em;
  border-radius:var(--r-pill);
  transition:color var(--dur) var(--ease);
  max-width:none;
}
.header-tool:hover{color:var(--cyan)}

/* 移动导航按钮（桌面隐藏） */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-inline-start:auto;
  padding:.5em .95em;
  border-radius:var(--r-pill);
  border:1px solid rgba(247,249,255,.26);
  color:var(--star-92);
  font-size:.86rem;
}
.nav-toggle__icon{position:relative;display:block;width:16px;height:10px;flex:none}
.nav-toggle__icon span{
  position:absolute;
  left:0;
  right:0;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.nav-toggle__icon span:nth-child(1){top:0}
.nav-toggle__icon span:nth-child(2){top:4px}
.nav-toggle__icon span:nth-child(3){top:8px}
[data-open="true"] .nav-toggle__icon span:nth-child(1){transform:translateY(4px) rotate(45deg)}
[data-open="true"] .nav-toggle__icon span:nth-child(2){opacity:0}
[data-open="true"] .nav-toggle__icon span:nth-child(3){transform:translateY(-4px) rotate(-45deg)}

/* 轨道进度线 */
.scroll-progress{
  position:absolute;
  left:22px;
  right:22px;
  bottom:5px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transform:scaleX(0);
  transform-origin:left center;
  pointer-events:none;
  transition:transform .12s linear;
}

/* 滚动状态 */
.site-header[data-hidden="true"]{transform:translateY(-135%)}
@media (min-width:981px){
  .site-header[data-scrolled="true"]{padding-top:10px}
  .site-header[data-scrolled="true"] .header-inner{padding:6px 10px 6px 14px}
  .site-header[data-scrolled="true"] .brand-line{opacity:0;max-height:0}
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(64px,10vw,140px);
  padding:clamp(38px,5vw,64px) 0 34px;
  background:linear-gradient(180deg,rgba(6,11,34,0) 0%,rgba(43,26,99,.45) 42%,rgba(6,11,34,.96) 100%);
}
.footer-rail{
  height:1px;
  margin-bottom:clamp(30px,4vw,52px);
  background:linear-gradient(90deg,transparent,rgba(53,224,214,.65),rgba(242,178,80,.6),transparent);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1.5fr) repeat(3,minmax(120px,.85fr));
  gap:clamp(22px,3vw,44px);
  align-items:start;
}
.footer-brand{display:grid;gap:14px;max-width:none}
.footer-note{font-size:.86rem;line-height:1.7;color:var(--star-45);max-width:34ch}
.footer-col{max-width:none}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:14px;
}
.footer-links{display:grid;gap:9px;max-width:none}
.footer-links a{
  display:inline-block;
  font-size:.9rem;
  text-decoration:none;
  color:var(--star-70);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--cyan);border-bottom-color:rgba(53,224,214,.55)}
.footer-links--contact li{font-size:.86rem;line-height:1.7;color:var(--star-70);max-width:32ch}
.footer-contact{
  grid-column:1/-1;
  max-width:none;
  padding-top:clamp(22px,3vw,34px);
  border-top:1px solid rgba(90,60,196,.4);
  display:grid;
  gap:16px;
  justify-items:start;
}
.footer-contact .footer-links{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));width:100%}
.footer-cta{margin-top:2px}
.footer-legal{
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid rgba(247,249,255,.12);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  font-size:.78rem;
  color:var(--star-45);
}
.footer-copy,.footer-icp{font-family:var(--font-mono);letter-spacing:.05em;max-width:none}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:10px 20px;margin-inline-start:auto;max-width:none}
.footer-legal-links a{text-decoration:none;color:var(--star-45);transition:color var(--dur) var(--ease)}
.footer-legal-links a:hover{color:var(--cyan)}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:70;
  width:48px;
  height:48px;
  display:grid;
  place-items:center;
  border-radius:50%;
  font-size:1.05rem;
  background:rgba(6,11,34,.85);
  border:1px solid rgba(53,224,214,.5);
  color:var(--cyan);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:rgba(53,224,214,.16)}

/* ==========================================================================
   响应式：平板与手机
   ========================================================================== */
@media (max-width:1120px){
  .brand-line{display:none}
  .nav-link{padding:.45em .78em;font-size:.86rem}
}

@media (max-width:980px){
  :root{--r-panel:20px}
  html{scroll-padding-top:96px}
  #main-content{padding-top:clamp(88px,16vw,120px);padding-bottom:104px}

  .site-header{
    top:auto;
    bottom:0;
    padding:0 12px calc(12px + env(safe-area-inset-bottom,0px));
  }
  .header-inner{padding:8px 12px 8px 14px;gap:12px}
  .header-tools{display:none}
  .nav-toggle{display:inline-flex}
  .brand-mark{width:34px;height:34px}
  .brand-name{font-size:.96rem}
  .scroll-progress{left:16px;right:16px;bottom:3px}

  .site-nav{
    position:absolute;
    left:0;
    right:0;
    bottom:calc(100% + 12px);
    display:block;
    padding:14px;
    border-radius:24px;
    background:linear-gradient(160deg,rgba(27,18,70,.97),rgba(6,11,34,.97));
    border:1px solid rgba(90,60,196,.55);
    box-shadow:0 -26px 60px -34px rgba(0,0,0,.98);
    opacity:0;
    visibility:hidden;
    transform:translateY(14px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
  }
  [data-open="true"] .site-nav{opacity:1;visibility:visible;transform:none}

  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item{width:100%}
  .nav-item--extra{display:none}
  .nav-list[data-expanded="true"] .nav-item--extra{display:block}
  .nav-link{display:block;padding:11px 14px;border-radius:14px;font-size:1rem}
  .nav-link[aria-current="page"]{box-shadow:none}

  .nav-more{
    display:block;
    width:100%;
    margin-top:2px;
    padding:11px 14px;
    border-radius:14px;
    text-align:left;
    font-size:.94rem;
    color:var(--cyan);
    border:1px dashed rgba(53,224,214,.45);
  }
  .nav-more::after{content:" +";font-family:var(--font-mono)}
  .nav-more[aria-expanded="true"]::after{content:" –"}

  .nav-tools{
    display:flex;
    flex-direction:column;
    gap:8px;
    margin-top:12px;
    padding-top:12px;
    border-top:1px solid rgba(247,249,255,.14);
  }
  .nav-tool{
    display:block;
    padding:11px 14px;
    border-radius:14px;
    font-size:.94rem;
    text-decoration:none;
    color:var(--star-70);
    border:1px solid rgba(247,249,255,.16);
  }
  .nav-tool:hover{color:var(--star)}
  .nav-tools .btn{width:100%}

  .site-header[data-hidden="true"]{transform:translateY(135%)}

  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
  .footer-legal{gap:8px 16px;font-size:.74rem}
  .footer-legal-links{margin-inline-start:0;width:100%}
  .to-top{
    width:44px;
    height:44px;
    bottom:calc(96px + env(safe-area-inset-bottom,0px));
  }
}

@media (max-width:520px){
  .footer-top{grid-template-columns:1fr}
  .footer-contact .footer-links{grid-template-columns:1fr}
  .brand-text{display:none}
}

/* ---------- 无障碍：减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none}
  .site-header{transform:none !important}
  .tree-node:hover,.tree-node:focus-within,.btn:hover{transform:none}
}