/* ============================================================
   九博娱乐会馆 — 共享样式 /assets/site.css
   主题：城市灯火不眠处 · 午夜蓝底 + 霓虹橙灯火
   分区：1 变量 2 重置 3 排版 4 容器与栅格 5 头部 6 页脚
        7 通用组件 8 动效与无障碍 9 响应式
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-900:#070B1E;
  --ink-800:#0A1029;
  --ink-700:#0E1633;
  --ink-600:#1B2450;
  --neon:#FF6A1F;
  --amber:#FFB347;
  --violet:#8A5CFF;
  --cyan:#2FE0C8;
  --white:#E8ECF7;
  --mist:#93A0C4;
  --paper:#F7F9FF;
  --hair:rgba(147,160,196,.18);
  --hair-strong:rgba(147,160,196,.34);
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --radius:4px;
  --radius-lg:10px;
  --gutter:20px;
  --shell:1240px;
  --dock-h:70px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-soft:0 12px 34px rgba(3,6,20,.55);
  --glow-neon:0 0 18px rgba(255,106,31,.38);
  --glow-amber:0 0 14px rgba(255,179,71,.4);
  --break-nav:980px;
}
@media (min-width:768px){
  :root{ --gutter:40px; --shell:1280px; --dock-h:64px; }
}
@media (min-width:1200px){
  :root{ --gutter:64px; --shell:1328px; }
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  padding-bottom:calc(var(--dock-h) + 6px);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(147,160,196,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(147,160,196,.045) 1px,transparent 1px);
  background-size:76px 76px;
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img,svg,video{ display:block; max-width:100%; }
a{ color:inherit; }
button{ font:inherit; color:inherit; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-weight:600; line-height:1.28; }
p{ margin:0; }
table{ border-collapse:collapse; }

/* ---------- 3. 排版 ---------- */
h1,.u-h1{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(30px,7vw,72px);
  line-height:1.12;
  letter-spacing:-.02em;
}
h2{ font-family:var(--font-serif); font-weight:600; font-size:clamp(24px,5vw,40px); }
h3{ font-family:var(--font-serif); font-weight:600; font-size:clamp(19px,3.2vw,26px); }
.prose{ max-width:68ch; }
.prose p{ margin:0 0 1.2em; }
.prose ul,.prose ol{ margin:0 0 1.2em; padding-left:1.15em; }
.prose ul{ list-style:disc; }
.prose ol{ list-style:decimal; }
.prose li{ margin-bottom:.5em; }
.prose strong{ color:var(--amber); font-weight:600; }
.prose a{ color:var(--cyan); text-decoration:underline; text-underline-offset:3px; }
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--cyan);
  text-transform:uppercase;
  margin:0;
}

/* ---------- 4. 容器与栅格 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.grid{ display:grid; gap:16px; }
.grid--split,.grid--split-alt,.grid--third{ grid-template-columns:1fr; }
@media (min-width:768px){
  .grid{ gap:20px; }
  .grid--split{ grid-template-columns:1.1fr .9fr; gap:28px; }
  .grid--split-alt{ grid-template-columns:.9fr 1.1fr; gap:28px; }
  .grid--third{ grid-template-columns:repeat(3,1fr); }
}
.hair-line{ height:1px; border:0; margin:0; background:var(--hair); }
.list-line{ display:flex; flex-direction:column; }
.list-line > li{ padding:15px 0; border-bottom:1px solid var(--hair); }
.breadcrumbs{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-size:13px; color:var(--mist);
}
.breadcrumbs a{ color:var(--mist); text-decoration:none; }
.breadcrumbs a:hover{ color:var(--amber); }
.breadcrumbs-sep{ color:rgba(147,160,196,.5); }

/* ---------- 5. 头部 ---------- */
.skip-link{
  position:absolute;
  left:16px; top:-64px;
  z-index:90;
  padding:10px 18px;
  background:var(--neon);
  color:#170800;
  font-size:14px; font-weight:600;
  text-decoration:none;
  border-radius:0 0 var(--radius) var(--radius);
  transition:top .2s var(--ease);
}
.skip-link:focus{ top:0; }

.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,rgba(7,11,30,.97),rgba(10,16,41,.92));
  border-bottom:1px solid var(--hair);
  color:var(--white);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.header-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:68px;
}
.brand-block{ display:flex; align-items:center; gap:12px; min-width:0; }
.brand-rail{
  flex:0 0 auto;
  width:8px; height:42px;
  border-radius:2px;
  background-image:repeating-linear-gradient(180deg,var(--amber) 0 3px,transparent 3px 8px);
  opacity:.9;
}
.brand{ display:flex; flex-direction:column; gap:2px; text-decoration:none; color:inherit; }
.brand-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:-.02em;
  line-height:1.2;
}
.brand-subline{
  font-size:11px;
  letter-spacing:.22em;
  color:var(--mist);
  line-height:1.4;
}
.header-veil{
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(4,6,18,.68);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease);
}
.site-header[data-open] .header-veil{ opacity:1; pointer-events:auto; }
.header-beacon{
  position:absolute;
  left:0; right:0; bottom:-1px;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--neon),var(--amber) 55%,var(--violet));
  box-shadow:0 0 12px rgba(255,106,31,.6);
}
.site-nav{
  position:fixed;
  top:0; right:0; bottom:0;
  z-index:2;
  width:min(330px,86vw);
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:92px 22px 26px;
  background:linear-gradient(180deg,var(--ink-700),var(--ink-900));
  border-left:1px solid rgba(255,106,31,.35);
  box-shadow:-18px 0 40px rgba(3,6,20,.6);
  overflow-y:auto;
  transform:translateX(102%);
  transition:transform .4s var(--ease);
}
.site-header[data-open] .site-nav{ transform:translateX(0); }
.nav-aside{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.3em;
  color:var(--amber);
}
.nav-list{ display:flex; flex-direction:column; gap:0; width:100%; }
.nav-item{ width:100%; border-bottom:1px solid var(--hair); }
.nav-item:last-child{ border-bottom:0; }
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:12px 10px;
  font-size:16px;
  color:var(--white);
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"›";
  margin-left:auto;
  color:var(--mist);
  font-size:20px;
  line-height:1;
}
.nav-link:hover{ color:var(--amber); background:rgba(138,92,255,.1); }
.nav-link[aria-current="page"]{ color:var(--neon); }
.nav-link[aria-current="page"]::after{ color:var(--neon); }
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  margin-top:auto;
  padding:0 20px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  color:#170800;
  text-decoration:none;
  border-radius:var(--radius);
  background:linear-gradient(120deg,var(--neon),var(--amber));
  box-shadow:var(--glow-neon);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{ transform:translateY(-2px); box-shadow:0 0 26px rgba(255,106,31,.55); }
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 14px;
  background:rgba(27,36,80,.7);
  border:1px solid var(--hair-strong);
  border-radius:var(--radius);
  color:var(--white);
  font-size:13px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-toggle:hover{ border-color:rgba(255,106,31,.6); box-shadow:var(--glow-neon); }
.nav-toggle-bars{ position:relative; display:inline-block; width:18px; height:12px; }
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:1.5px;
  border-radius:2px;
  background:var(--neon);
  transition:transform .28s var(--ease),top .28s var(--ease);
}
.nav-toggle-bars::before{ top:1px; }
.nav-toggle-bars::after{ top:9px; }
.site-header[data-open] .nav-toggle-bars::before{ top:5px; transform:rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after{ top:5px; transform:rotate(-45deg); }

@media (min-width:980px){
  .brand-rail{ height:44px; }
  .brand-mark{ font-size:21px; }
  .brand-subline{ font-size:11.5px; }
  .site-nav{
    position:static;
    width:auto;
    flex-direction:row;
    align-items:center;
    gap:2px;
    padding:0;
    background:none;
    border-left:0;
    box-shadow:none;
    overflow:visible;
    transform:none;
  }
  .nav-aside{ display:none; }
  .nav-list{ flex-direction:row; align-items:center; gap:2px; width:auto; }
  .nav-item{ width:auto; border-bottom:0; }
  .nav-link{
    padding:10px 14px;
    font-size:15px;
    color:var(--mist);
    border:1px solid transparent;
    border-radius:2px;
  }
  .nav-link::after{ content:none; }
  .nav-link::before{
    content:"";
    position:absolute;
    left:0; top:50%;
    width:2px; height:0;
    background:var(--neon);
    transform:translateY(-50%);
    transition:height .24s var(--ease);
    box-shadow:0 0 10px var(--neon);
  }
  .nav-link:hover{ color:var(--white); background:rgba(138,92,255,.12); }
  .nav-link[aria-current="page"]{
    color:var(--white);
    border-color:rgba(255,106,31,.5);
    background:rgba(255,106,31,.1);
  }
  .nav-link[aria-current="page"]::before{ height:70%; }
  .nav-cta{ margin-top:0; margin-left:14px; min-height:40px; padding:0 18px; font-size:13px; }
  .nav-toggle{ display:none; }
  .header-veil{ display:none; }
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:0;
  border-top:1px solid var(--hair);
  color:var(--white);
  background:
    radial-gradient(120% 80% at 12% 0%,rgba(255,106,31,.09),transparent 58%),
    radial-gradient(90% 70% at 88% 10%,rgba(138,92,255,.12),transparent 62%),
    linear-gradient(180deg,var(--ink-900),var(--ink-800) 34%,#060917 100%);
}
.footer-dock{
  position:fixed;
  left:0; right:0; bottom:0;
  z-index:55;
  border-top:1px solid rgba(255,106,31,.45);
  background:linear-gradient(90deg,rgba(255,106,31,.18),rgba(7,11,30,.97) 38%,rgba(7,11,30,.97));
  box-shadow:0 -10px 30px rgba(3,6,20,.6);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.dock-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:10px;
  padding-bottom:10px;
}
.dock-note{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--mist);
}
.dock-note::before{
  content:"";
  width:7px; height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
}
.dock-actions{ display:flex; flex-wrap:wrap; gap:10px; }
.dock-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 18px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.04em;
  text-decoration:none;
  border-radius:var(--radius);
  border:1px solid var(--hair-strong);
  background:rgba(7,11,30,.72);
  transition:border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.dock-btn::before{
  content:"";
  width:6px; height:6px;
  border-radius:50%;
  background:currentColor;
  box-shadow:0 0 10px currentColor;
}
.dock-btn--ios{ color:var(--amber); border-color:rgba(255,179,71,.5); }
.dock-btn--ios:hover{ box-shadow:0 0 18px rgba(255,179,71,.4); }
.dock-btn--android{ color:var(--cyan); border-color:rgba(47,224,200,.45); }
.dock-btn--android:hover{ box-shadow:0 0 18px rgba(47,224,200,.35); }

.footer-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding-top:56px;
  padding-bottom:40px;
}
.footer-brand{ max-width:36ch; }
.footer-mark{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:-.02em;
}
.footer-subline{
  margin:6px 0 0;
  font-family:var(--font-serif);
  font-size:15px;
  letter-spacing:.14em;
  color:var(--amber);
}
.footer-claim{ margin:16px 0 0; font-size:14px; line-height:1.9; color:var(--mist); }
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--amber);
}
.footer-links{ display:flex; flex-direction:column; gap:2px; }
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:38px;
  padding:4px 0;
  font-size:15px;
  color:var(--mist);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-link::before{
  content:"";
  width:10px; height:1px;
  background:var(--hair-strong);
  transition:width .2s var(--ease),background .2s var(--ease);
}
.footer-link:hover{ color:var(--white); }
.footer-link:hover::before{ width:18px; background:var(--neon); }
.footer-contact{ min-width:0; }
.contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 10px;
  font-size:14px;
}
.contact-key{
  flex:0 0 auto;
  padding:2px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
  border:1px solid var(--hair);
  border-radius:999px;
}
.contact-value{ color:var(--white); font-size:14px; line-height:1.7; }
.copy-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:38px;
  padding:6px 12px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--white);
  word-break:break-all;
  text-align:left;
  background:rgba(27,36,80,.72);
  border:1px solid var(--hair);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.copy-chip::after{
  content:"复制";
  font-family:var(--font-body);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--neon);
}
.copy-chip:hover{ border-color:rgba(255,106,31,.6); background:rgba(255,106,31,.1); box-shadow:var(--glow-neon); }
.footer-base{ border-top:1px solid var(--hair); }
.base-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  padding-top:20px;
  padding-bottom:26px;
}
.footer-info{ margin:0; max-width:74ch; font-size:13px; line-height:1.9; color:var(--mist); }
.footer-record{ margin:0; font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; color:var(--mist); }
.footer-copy{ margin:0; font-family:var(--font-mono); font-size:12px; color:rgba(147,160,196,.75); }

.to-top{
  position:fixed;
  right:16px;
  bottom:calc(var(--dock-h) + 16px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px; height:48px;
  color:var(--amber);
  background:rgba(14,22,51,.94);
  border:1px solid rgba(255,179,71,.45);
  border-radius:50%;
  box-shadow:var(--shadow-soft);
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),opacity .3s var(--ease);
}
.to-top[hidden]{ display:none; }
.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);
}
.to-top:hover{ transform:translateY(-2px); box-shadow:0 0 20px rgba(255,179,71,.4); }
.copy-toast{
  position:fixed;
  left:50%;
  bottom:calc(var(--dock-h) + 20px);
  z-index:80;
  margin:0;
  max-width:88vw;
  padding:10px 18px;
  font-size:13px;
  color:var(--white);
  background:rgba(27,36,80,.97);
  border:1px solid rgba(47,224,200,.5);
  border-radius:var(--radius);
  opacity:0;
  transform:translate(-50%,10px);
  pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.copy-toast[data-show]{ opacity:1; transform:translate(-50%,0); }

@media (min-width:640px){
  .footer-shell{ grid-template-columns:repeat(2,1fr); }
}
@media (min-width:1024px){
  .footer-shell{
    grid-template-columns:1.35fr .85fr .85fr 1.25fr;
    gap:40px;
    padding-top:72px;
    padding-bottom:52px;
  }
  .footer-mark{ font-size:22px; }
}
@media (max-width:599px){
  .dock-note{ display:none; }
  .dock-inner{ justify-content:center; }
  .dock-actions{ width:100%; }
  .dock-btn{ flex:1 1 0; justify-content:center; }
}

/* ---------- 7. 通用组件 ---------- */
.band{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 0;
  border-top:1px solid var(--hair);
}
.band-num{
  font-family:var(--font-mono);
  font-size:15px;
  letter-spacing:.08em;
  color:var(--amber);
  text-shadow:0 0 12px rgba(255,179,71,.6);
}
.band-rule{
  flex:1;
  height:1px;
  background:linear-gradient(90deg,rgba(255,106,31,.75),rgba(138,92,255,.3),transparent);
}
.band-kicker{
  font-size:12px;
  letter-spacing:.26em;
  color:var(--mist);
  text-transform:uppercase;
}
.band-title{
  margin:10px 0 0;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(24px,5vw,40px);
  line-height:1.3;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.btn--neon{
  color:#170800;
  background:linear-gradient(120deg,var(--neon),var(--amber));
  box-shadow:var(--glow-neon);
}
.btn--neon:hover{ transform:translateY(-2px); box-shadow:0 0 26px rgba(255,106,31,.5); }
.btn--ghost{
  color:var(--white);
  background:rgba(27,36,80,.55);
  border-color:var(--hair-strong);
}
.btn--ghost:hover{ border-color:rgba(138,92,255,.7); transform:translateY(-2px); }
.card{
  position:relative;
  padding:22px;
  border:1px solid var(--hair);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(27,36,80,.78),rgba(14,22,51,.84));
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(255,106,31,.5);
  box-shadow:0 10px 28px rgba(3,6,20,.55),0 0 0 1px rgba(255,106,31,.18);
}
.card-title{
  margin-bottom:8px;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:20px;
}
.card-body{ margin:0; font-size:15px; line-height:1.78; color:var(--mist); }
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:36px;
  padding:6px 14px;
  font-size:13px;
  color:var(--mist);
  background:rgba(27,36,80,.55);
  border:1px solid var(--hair-strong);
  border-radius:999px;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.tag:hover{ color:var(--white); border-color:rgba(138,92,255,.7); }
.tag--active,
.tag[aria-pressed="true"]{
  color:#170800;
  border-color:transparent;
  background:linear-gradient(120deg,var(--neon),var(--amber));
  box-shadow:var(--glow-neon);
}
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--hair-strong);
  border-radius:var(--radius);
  background:linear-gradient(160deg,var(--ink-700),var(--ink-900) 72%);
  box-shadow:var(--shadow-soft);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,179,71,.1) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,179,71,.1) 1px,transparent 1px);
  background-size:34px 34px;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(120% 90% at 80% 12%,rgba(255,106,31,.26),transparent 60%),
    radial-gradient(90% 70% at 8% 92%,rgba(138,92,255,.22),transparent 62%);
}
.media-frame > img{ width:100%; height:100%; object-fit:cover; }
.media-frame--tall{ aspect-ratio:4 / 5; }
.media-frame--wide{ aspect-ratio:21 / 9; }
.paper-panel{
  padding:28px 22px;
  color:#12172B;
  background-color:var(--paper);
  background-image:repeating-linear-gradient(90deg,rgba(27,36,80,.05) 0 1px,transparent 1px 14px);
  border-radius:var(--radius-lg);
}
.paper-panel a{ color:#1B2450; }
.toc{ display:flex; flex-direction:column; gap:2px; }
.toc-title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--mist);
}
.toc-list{ display:flex; flex-direction:column; gap:2px; }
.toc-link{
  display:block;
  padding:9px 12px;
  font-size:14px;
  color:var(--mist);
  text-decoration:none;
  border-left:2px solid var(--hair-strong);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.toc-link:hover{ color:var(--white); }
.toc-link[aria-current="true"]{
  color:var(--amber);
  border-left-color:var(--neon);
  background:rgba(255,106,31,.08);
}

/* ---------- 8. 动效与无障碍 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
[data-reveal].is-visible{ opacity:1; transform:none; }
:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:2px;
}
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{ opacity:1; transform:none; }
}

/* ---------- 9. 响应式补充 ---------- */
@media (min-width:768px){
  body{ font-size:17px; }
  .header-shell{ min-height:74px; }
  .card{ padding:26px; }
  .paper-panel{ padding:36px 32px; }
}
@media (min-width:1024px){
  .to-top{ right:28px; }
}