/* ============================================================
   幻影赛场 · 共享站点样式 /assets/site.css
   夜间转播台 × 数据控制室 · 极简文字建筑
   ============================================================ */

:root{
  --void:#07080D;
  --panel:#10131C;
  --panel-deep:#0A0C14;
  --violet:#7C5CFF;
  --violet-soft:#8F73FF;
  --violet-ink:#241D45;
  --cyan:#3BF5C8;
  --cyan-deep:#0E3E35;
  --amber:#FFB347;
  --text:#F4F2FF;
  --dim:#B9B4D6;
  --dim-deep:#8E88AE;
  --hair:#2D2A45;
  --hair-soft:rgba(45,42,69,.6);
  --maxw:1180px;
  --gutter:clamp(16px,5vw,56px);
  --header-h:64px;
  --radius:3px;
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

@media (min-width:960px){
  :root{ --header-h:76px; }
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--void);
  background-image:
    radial-gradient(1100px 640px at 82% -12%, rgba(124,92,255,.20), transparent 68%),
    radial-gradient(820px 520px at 0% -8%, rgba(59,245,200,.055), transparent 70%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body.nav-open{ overflow:hidden; }
img,svg,video{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:none; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,h5,h6,p,figure,blockquote{ margin:0; }
table{ border-collapse:collapse; width:100%; }
[hidden]{ display:none !important; }
::selection{ background:var(--violet); color:#0A0714; }
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
[id]{ scroll-margin-top:calc(var(--header-h) + 44px); }

/* ---------- 排版基座 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.12;
  letter-spacing:-.01em;
  color:var(--text);
}
p{ margin:0 0 1.1em; }
p:last-child{ margin-bottom:0; }
strong,b{ color:var(--text); font-weight:700; }
small{ font-size:.8125rem; color:var(--dim); }

.h-display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.4rem,6.4vw,4.8rem);
  line-height:.98;
  letter-spacing:-.02em;
  margin:0;
}
.h-section{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.6rem,3.4vw,2.5rem);
  line-height:1.1;
  margin:0;
}
.lede{
  font-size:clamp(1rem,1.5vw,1.125rem);
  line-height:1.8;
  color:var(--dim);
  max-width:56ch;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--violet);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--violet);
  flex:none;
}

/* ---------- 布局 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{ padding-block:clamp(40px,7vw,88px); }
.section--tight{ padding-block:clamp(26px,4vw,48px); }
.grid{ display:grid; gap:clamp(14px,2.4vw,26px); }
.grid--2{ grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr)); }
.grid--3{ grid-template-columns:repeat(auto-fit,minmax(min(100%,258px),1fr)); }

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:14px;
  z-index:900;
  padding:10px 18px;
  background:var(--cyan);
  color:#04120E;
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:0 0 var(--radius) var(--radius);
  transition:top .2s ease;
}
.skip-link:focus{
  top:0;
  outline-offset:2px;
}

/* ---------- 品牌标记 ---------- */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  color:var(--text);
}
.brand-mark{
  flex:none;
  width:13px;
  height:28px;
  border-radius:1px;
  background:linear-gradient(180deg,var(--violet) 0%,var(--violet) 52%,var(--cyan) 52%,var(--cyan) 100%);
  transform:skewX(-14deg);
  box-shadow:0 0 0 1px rgba(124,92,255,.32);
}
.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
  line-height:1.15;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.0625rem;
  letter-spacing:.12em;
  color:var(--text);
  white-space:nowrap;
}
.brand-line{
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.14em;
  color:var(--dim);
  white-space:nowrap;
}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:300;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s ease, border-color .28s ease, box-shadow .28s ease;
}
.site-header[data-scrolled]{
  background:rgba(7,8,13,.93);
  border-bottom-color:var(--hair);
  box-shadow:0 20px 44px -34px #000;
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
}
.header-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:10px var(--gutter);
  display:flex;
  align-items:center;
  gap:16px;
  min-height:var(--header-h);
}
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,30px);
  margin-left:auto;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.6vw,22px);
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-size:.875rem;
  letter-spacing:.08em;
  color:var(--dim);
  transition:color .2s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:0;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .25s ease;
}
.nav-link:hover,.nav-link:focus-visible{ color:var(--text); }
.nav-link:hover::after{ transform:scaleX(1); }
.nav-link[aria-current="page"]{ color:var(--text); }
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  height:2px;
  background:var(--violet);
}
.nav-aside{
  display:flex;
  align-items:center;
  gap:14px;
}
.nav-quick{ display:none; }
.nav-cta{
  display:flex;
  align-items:center;
  gap:10px;
}

/* 移动菜单按钮 */
.nav-toggle{
  margin-left:auto;
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 11px;
  border:1px solid var(--hair);
  border-radius:2px;
  color:var(--text);
  cursor:pointer;
  background:rgba(16,19,28,.5);
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{ border-color:var(--violet); }
.nav-toggle-icon{
  display:inline-flex;
  flex-direction:column;
  gap:4px;
  width:18px;
  flex:none;
}
.nav-toggle-icon i{
  display:block;
  height:1.5px;
  width:100%;
  background:currentColor;
  transition:transform .25s ease, opacity .2s ease;
}
.nav-toggle-text{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  color:var(--dim);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(1){ transform:translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(3){ transform:translateY(-5.5px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"]{ border-color:var(--cyan); }
.nav-toggle[aria-expanded="true"] .nav-toggle-text{ color:var(--cyan); }

/* 第二栏快速入口轨道 */
.header-rail{
  display:none;
  border-top:1px solid var(--hair-soft);
}
.header-rail-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:7px var(--gutter);
  display:flex;
  align-items:center;
  gap:18px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.13em;
  color:var(--dim);
  text-transform:uppercase;
}
.rail-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--violet);
}
.rail-label::before{
  content:"";
  width:14px;
  height:1px;
  background:var(--violet);
}
.rail-link{
  color:var(--dim);
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.rail-link:hover,.rail-link:focus-visible{
  color:var(--text);
  border-bottom-color:var(--hair);
}
.rail-status{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--dim);
  letter-spacing:.1em;
}
.rail-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(59,245,200,.16);
  flex:none;
}

/* 顶部滚动进度 */
.header-progress{
  position:absolute;
  left:0; right:0; bottom:-1px;
  height:1px;
  pointer-events:none;
  overflow:hidden;
}
.header-progress span{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* ---------- 快速胶囊 ---------- */
.quick-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  border:1px solid var(--hair);
  border-radius:2px;
  color:var(--dim);
  transition:color .2s ease, border-color .2s ease, background-color .2s ease;
  white-space:nowrap;
}
.quick-chip--amber{
  color:var(--amber);
  border-color:rgba(255,179,71,.35);
  background:rgba(255,179,71,.07);
}
.quick-chip--amber:hover{
  background:rgba(255,179,71,.16);
  border-color:rgba(255,179,71,.6);
}
.quick-chip--cyan{
  color:var(--cyan);
  border-color:rgba(59,245,200,.3);
  background:rgba(59,245,200,.06);
}
.quick-chip--cyan:hover{
  background:rgba(59,245,200,.14);
  border-color:rgba(59,245,200,.55);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:44px;
  padding:0 1.25em;
  font-family:var(--font-body);
  font-size:.875rem;
  font-weight:500;
  letter-spacing:.04em;
  line-height:1;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  text-align:center;
  transition:background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .15s ease;
}
.btn:active{ transform:translateY(1px); }
.btn--solid{
  background:var(--violet);
  color:#08060F;
  border-color:var(--violet);
  font-weight:700;
}
.btn--solid:hover,.btn--solid:focus-visible{
  background:var(--violet-soft);
  box-shadow:0 12px 30px -16px rgba(124,92,255,.95);
}
.btn--ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--hair);
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  border-color:var(--violet);
  color:#DCD4FF;
  background:rgba(124,92,255,.1);
}
.btn--cyan{
  background:var(--cyan);
  color:#04120E;
  border-color:var(--cyan);
  font-weight:700;
}
.btn--cyan:hover,.btn--cyan:focus-visible{
  background:#6BFFDA;
  box-shadow:0 12px 30px -16px rgba(59,245,200,.95);
}
.btn--sm{
  min-height:36px;
  font-size:.8125rem;
  padding:0 1em;
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  border-radius:2px;
  border:1px solid var(--hair);
  color:var(--dim);
  background:rgba(244,242,255,.025);
  white-space:nowrap;
}
.tag--cyan{
  color:var(--cyan);
  border-color:rgba(59,245,200,.3);
  background:var(--cyan-deep);
}
.tag--amber{
  color:var(--amber);
  border-color:rgba(255,179,71,.35);
  background:rgba(255,179,71,.09);
}
.tag--violet{
  color:#CDBFFF;
  border-color:rgba(124,92,255,.45);
  background:rgba(124,92,255,.15);
}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--hair);
  border-radius:var(--radius);
  padding:clamp(18px,3vw,28px);
  box-shadow:0 24px 48px -40px rgba(0,0,0,.95);
}
.panel--plum{
  background:linear-gradient(155deg,var(--violet-ink) 0%,#14101F 62%,var(--panel) 100%);
  border-color:rgba(124,92,255,.28);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  padding-block:clamp(16px,2.6vw,26px) 0;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--dim);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
}
.breadcrumbs li{
  display:flex;
  align-items:center;
  gap:8px;
  min-width:0;
}
.breadcrumbs li + li::before{
  content:"/";
  color:var(--hair);
  flex:none;
}
.breadcrumbs a{
  color:var(--dim);
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.breadcrumbs a:hover{
  color:var(--text);
  border-bottom-color:var(--hair);
}
.breadcrumbs [aria-current="page"]{ color:var(--text); }

/* ---------- 长文容器 ---------- */
.prose{
  max-width:64ch;
  font-size:1.0625rem;
  line-height:1.85;
  color:var(--text);
}
.prose h2{
  margin:2.2em 0 .7em;
  font-size:clamp(1.45rem,3vw,2rem);
}
.prose h3{
  margin:1.8em 0 .6em;
  font-family:var(--font-body);
  font-size:1.0625rem;
  font-weight:700;
  letter-spacing:.02em;
}
.prose p{ color:var(--dim); margin:0 0 1.2em; }
.prose ul,.prose ol{ margin:0 0 1.3em; }
.prose li{
  position:relative;
  padding-left:1.35em;
  margin-bottom:.6em;
  color:var(--dim);
}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:8px;
  height:1px;
  background:var(--cyan);
}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(59,245,200,.35);
}
.prose a:hover{ border-bottom-color:var(--cyan); }
.prose blockquote{
  margin:0 0 1.4em;
  padding:2px 0 2px 20px;
  border-left:2px solid var(--violet);
  color:var(--text);
}
.prose hr{
  border:none;
  border-top:1px solid var(--hair);
  margin:2.4em 0;
}

/* ---------- 图片容器基础 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(150deg,var(--violet-ink) 0%,#0B0A14 78%);
  border:1px solid var(--hair);
  border-radius:var(--radius);
}
.media > img,
.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--16x9{ aspect-ratio:16 / 9; }
.media--4x3{ aspect-ratio:4 / 3; }
.media--1x1{ aspect-ratio:1 / 1; }
.media--3x4{ aspect-ratio:3 / 4; }
.media--veil::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,8,13,0) 42%,rgba(7,8,13,.8) 100%);
  pointer-events:none;
}
.media--slant{
  clip-path:polygon(0 0,100% 0,100% calc(100% - clamp(22px,4vw,46px)),0 100%);
}
.media--ph::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(120% 90% at 78% 0%, rgba(124,92,255,.4), transparent 62%),
    radial-gradient(80% 70% at 8% 100%, rgba(59,245,200,.14), transparent 66%),
    repeating-linear-gradient(115deg, rgba(244,242,255,.05) 0 1px, transparent 1px 15px);
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,10vw,120px);
  background:linear-gradient(180deg,var(--panel-deep) 0%,var(--panel) 46%,var(--panel-deep) 100%);
  border-top:1px solid var(--hair);
  color:var(--dim);
  font-size:.9375rem;
  overflow:hidden;
}
.footer-stand{
  height:clamp(64px,9vw,122px);
  background-image:
    radial-gradient(62% 130% at 20% 118%, rgba(124,92,255,.45), transparent 62%),
    radial-gradient(52% 122% at 74% 128%, rgba(59,245,200,.16), transparent 60%),
    repeating-linear-gradient(90deg, rgba(244,242,255,.055) 0 1px, transparent 1px 11px);
  -webkit-mask-image:linear-gradient(180deg, transparent, #000 72%);
  mask-image:linear-gradient(180deg, transparent, #000 72%);
  pointer-events:none;
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1.3fr) minmax(0,1.7fr);
  gap:clamp(28px,5vw,64px);
  padding-block:clamp(30px,5vw,58px) 0;
}
.footer-brand .brand{ margin-bottom:18px; }
.footer-summary{
  max-width:36ch;
  color:var(--dim);
  font-size:.9375rem;
  line-height:1.8;
  margin:0 0 22px;
}
.footer-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
  align-content:start;
}
.footer-title{
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--violet);
  margin:0 0 14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--hair-soft);
}
.footer-list li + li{ margin-top:8px; }
.footer-list a{
  position:relative;
  display:inline-block;
  font-size:.9375rem;
  color:var(--dim);
  transition:color .2s ease;
}
.footer-list a::before{
  content:"";
  display:inline-block;
  width:0;
  height:1px;
  background:var(--cyan);
  vertical-align:middle;
  margin-right:0;
  transition:width .22s ease, margin-right .22s ease;
}
.footer-list a:hover,
.footer-list a:focus-visible,
.footer-list a[aria-current="page"]{ color:var(--text); }
.footer-list a:hover::before,
.footer-list a:focus-visible::before{
  width:12px;
  margin-right:8px;
}
.footer-contact{
  border-top:1px solid var(--hair-soft);
  margin-top:clamp(26px,4vw,46px);
  padding-top:clamp(20px,3.4vw,32px);
}
.footer-contact-inner{
  display:flex;
  flex-wrap:wrap;
  gap:12px 40px;
  align-items:baseline;
}
.contact-item{
  display:flex;
  align-items:baseline;
  gap:10px;
  min-width:0;
  flex-wrap:wrap;
}
.contact-key{
  flex:none;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  color:var(--cyan);
  text-transform:uppercase;
}
.contact-value{
  color:var(--text);
  font-size:.9375rem;
  overflow-wrap:anywhere;
}
.copy-btn{
  flex:none;
  padding:2px 9px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  background:transparent;
  border:1px solid var(--hair);
  border-radius:2px;
  color:var(--dim);
  cursor:pointer;
  transition:color .2s ease, border-color .2s ease, background-color .2s ease;
}
.copy-btn:hover{
  color:var(--amber);
  border-color:rgba(255,179,71,.45);
  background:rgba(255,179,71,.08);
}
.copy-btn[data-copied]{
  color:var(--cyan);
  border-color:rgba(59,245,200,.45);
  background:rgba(59,245,200,.1);
}
.footer-note{
  margin-top:14px;
  max-width:72ch;
  font-size:.8125rem;
  line-height:1.75;
  color:var(--dim-deep);
}
.footer-legal{
  margin-top:clamp(24px,4vw,38px);
  border-top:1px solid var(--hair);
  background:rgba(7,8,13,.55);
}
.footer-legal-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 24px;
  padding-block:18px;
}
.footer-copy,.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--dim);
}
.footer-icp{ color:var(--dim-deep); }
.footer-legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin:0 0 0 auto;
}
.footer-legal-links a{
  color:var(--dim);
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.footer-legal-links a:hover{
  color:var(--text);
  border-bottom-color:var(--hair);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:250;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:50%;
  background:rgba(16,19,28,.92);
  border:1px solid var(--hair);
  color:var(--text);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease, visibility .25s ease, border-color .2s ease, color .2s ease;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}
.to-top:hover{
  border-color:var(--cyan);
  color:var(--cyan);
}
.to-top::before{
  content:"";
  width:9px;
  height:9px;
  border-left:1.5px solid currentColor;
  border-top:1.5px solid currentColor;
  transform:rotate(45deg) translate(1px,1px);
}

/* ---------- 显现动效（由 JS 添加类） ---------- */
.reveal-ready{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1);
  will-change:opacity, transform;
}
.reveal-ready.is-in{
  opacity:1;
  transform:none;
}

/* ---------- 响应式：平板与移动 ---------- */
@media (max-width:959px){
  .nav-toggle{ display:inline-flex; }
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:10px var(--gutter) 24px;
    background:rgba(7,8,13,.98);
    border-bottom:1px solid var(--hair);
    box-shadow:0 34px 60px -42px #000;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
  }
  .site-nav[data-open]{ display:flex; }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list li{ border-bottom:1px solid var(--hair-soft); }
  .nav-link{
    display:block;
    padding:14px 2px;
    font-size:1rem;
    letter-spacing:.06em;
  }
  .nav-link::after{ display:none; }
  .nav-link[aria-current="page"]{ color:var(--cyan); }
  .nav-aside{
    margin-top:20px;
    flex-direction:column;
    align-items:stretch;
    gap:16px;
  }
  .nav-quick{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
  }
  .nav-cta{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
  }
  .nav-cta .btn{ width:100%; }
  .footer-main{ grid-template-columns:1fr; }
}

@media (max-width:860px){
  .footer-nav{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}

@media (max-width:600px){
  .brand-line{ display:none; }
  .brand-name{ font-size:1rem; }
  .nav-toggle-text{ display:none; }
  .footer-nav{ grid-template-columns:1fr; }
  .footer-legal-links{ margin-left:0; }
  .footer-contact-inner{ flex-direction:column; gap:10px; }
  .contact-item{ width:100%; }
}

@media (min-width:960px){
  .header-rail{ display:block; }
}

@media (min-width:960px) and (max-width:1120px){
  .nav-cta .btn--ghost{ display:none; }
  .nav-link{ font-size:.8125rem; }
}

/* ---------- 降低动效 ---------- */
@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;
  }
  .reveal-ready{
    opacity:1 !important;
    transform:none !important;
  }
}