/* ============================================================
   777电玩城 · /assets/site.css
   共享外壳与基础组件（页面特色布局由页面专属 CSS 承担）
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#08060F;
  --panel:#1B1030;
  --violet:#8B5CF6;
  --blue:#2F6BFF;
  --amber:#FFB020;
  --cyan:#22D3EE;
  --mist:#B8A8D9;
  --white:#F5F3FF;
  --line:#3A2A5A;
  --deep:#0D1226;

  --violet-soft:rgba(139,92,246,.14);
  --blue-soft:rgba(47,107,255,.16);
  --cyan-soft:rgba(34,211,238,.14);
  --amber-soft:rgba(255,176,32,.14);
  --line-soft:rgba(58,42,90,.72);

  --font-display:'Rajdhani','Noto Sans SC','PingFang SC',sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,monospace;
  --font-pixel:'Press Start 2P','Noto Sans SC',monospace;

  --wrap:1240px;
  --pad:clamp(1rem,4vw,2.5rem);
  --cut:10px;
}

/* ---------- 2. Reset / 基础 ---------- */
*,*::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;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 84% -10%, rgba(139,92,246,.30), transparent 62%),
    radial-gradient(900px 520px at 6% 10%, rgba(47,107,255,.20), transparent 60%),
    radial-gradient(760px 520px at 52% 112%, rgba(34,211,238,.12), transparent 62%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(184,168,217,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184,168,217,.05) 1px, transparent 1px);
  background-size:72px 72px;
}
main{
  display:block;
  position:relative;
  z-index:1;
}
img{max-width:100%;height:auto;}
a{color:var(--cyan);text-underline-offset:.22em;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  margin:0 0 .5em;
  letter-spacing:.01em;
}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1em;}
::selection{background:var(--violet);color:#fff;}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}

/* ---------- 3. 布局工具 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.skip-link{
  position:absolute;
  left:12px;
  top:-80px;
  z-index:300;
  display:inline-block;
  padding:.7rem 1.1rem;
  background:var(--amber);
  color:#160B00;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible{top:12px;}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.8rem 1.25rem;
  border:1px solid transparent;
  background:transparent;
  color:var(--white);
  font-family:var(--font-display);
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  line-height:1.2;
  cursor:pointer;
  clip-path:polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn--sm{padding:.5rem .85rem;font-size:.82rem;}
.btn--primary{
  background:linear-gradient(135deg,var(--violet),var(--blue));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(245,243,255,.18), 0 10px 26px -16px rgba(139,92,246,.95);
}
.btn--primary:hover{
  background:linear-gradient(135deg,#A277FF,var(--violet));
  box-shadow:inset 0 0 0 1px rgba(245,243,255,.32), 0 0 24px -6px rgba(139,92,246,.85);
}
.btn--ghost{
  background:rgba(139,92,246,.10);
  border-color:var(--line);
  color:var(--white);
}
.btn--ghost:hover{border-color:var(--violet);background:rgba(139,92,246,.22);}
.btn--amber{background:var(--amber);color:#160B00;}
.btn--amber:hover{background:#FFC24D;box-shadow:0 0 22px -6px rgba(255,176,32,.8);}
.btn--block{width:100%;}

/* ---------- 5. 头部：双层命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg, rgba(8,6,15,.97), rgba(13,18,38,.93));
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(10px);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--amber) 0 12%,var(--violet) 12% 48%,var(--blue) 48% 82%,var(--cyan) 82% 100%);
  opacity:.9;
}
.header-rail{
  background:var(--deep);
  border-bottom:1px solid var(--line-soft);
}
.header-rail__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  min-height:32px;
}
.rail-meta,
.rail-note{
  margin:0;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--mist);
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:.5rem;
}
.rail-dot{
  width:6px;
  height:6px;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
  transform:rotate(45deg);
}
.rail-num{color:var(--amber);}
.header-bar{position:relative;}
.header-bar__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(.75rem,2vw,1.6rem);
  min-height:70px;
  padding-block:.5rem;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  color:var(--white);
  text-decoration:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  padding:.42rem .62rem;
  background:linear-gradient(135deg,var(--amber),#FF7A18 58%,var(--violet));
  color:#0B0512;
  font-family:var(--font-display);
  font-size:1.15rem;
  font-weight:900;
  letter-spacing:.02em;
  line-height:1;
  transform:skewX(-8deg);
  box-shadow:4px 4px 0 rgba(139,92,246,.38);
}
.brand-mark b{display:block;transform:skewX(8deg);}
.brand-text{display:block;min-width:0;}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:1.06rem;
  font-weight:800;
  letter-spacing:.08em;
  line-height:1.15;
}
.brand-tag{
  display:block;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.16em;
  color:var(--mist);
  white-space:nowrap;
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(.6rem,1.6vw,1.4rem);
  flex:1 1 auto;
  min-width:0;
  margin-left:auto;
}
.site-nav{min-width:0;}
.nav-list{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-item{list-style:none;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:.4rem;
  padding:.55rem .6rem;
  color:var(--mist);
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
  transition:color .16s ease,background .16s ease;
}
.nav-index{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.08em;
  color:rgba(184,168,217,.55);
}
.nav-label{white-space:nowrap;}
.nav-link::after{
  content:"";
  position:absolute;
  left:.6rem;
  right:.6rem;
  bottom:.26rem;
  height:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--white);background:rgba(139,92,246,.13);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{
  color:var(--white);
  background:linear-gradient(180deg, rgba(139,92,246,.26), rgba(139,92,246,.05));
  box-shadow:inset 0 0 0 1px rgba(139,92,246,.45);
}
.nav-link[aria-current="page"] .nav-index{color:var(--amber);}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--amber);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:.5rem;
  flex:0 0 auto;
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  margin-left:auto;
  padding:.5rem .7rem;
  background:rgba(139,92,246,.12);
  border:1px solid var(--line);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.nav-toggle__bars{display:grid;gap:3px;width:16px;}
.nav-toggle__bars i{display:block;height:2px;background:var(--cyan);transition:transform .18s ease,opacity .18s ease;}
.nav-toggle__text{line-height:1;}
.nav-toggle[aria-expanded="true"]{border-color:var(--amber);color:var(--amber);background:rgba(255,176,32,.12);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

/* ---------- 6. 页脚：档案签 + 状态行 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(3rem,8vw,6rem);
  border-top:1px solid var(--line-soft);
  background-image:
    radial-gradient(760px 320px at 88% 0%, rgba(47,107,255,.22), transparent 66%),
    radial-gradient(600px 300px at 8% 8%, rgba(139,92,246,.20), transparent 70%),
    linear-gradient(180deg, rgba(13,18,38,.55), rgba(8,6,15,.99));
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:46%;
  height:2px;
  background:linear-gradient(90deg,var(--amber),var(--violet),transparent);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,2.05fr);
  gap:clamp(1.5rem,4vw,3rem);
  padding-block:clamp(2rem,5vw,3.4rem);
}
.footer-sign{display:grid;align-content:start;gap:.9rem;}
.brand--footer .brand-name{font-size:1.15rem;}
.footer-line{
  margin:0;
  color:var(--mist);
  font-size:.94rem;
  max-width:26ch;
}
.footer-tabs{display:flex;flex-wrap:wrap;gap:.45rem;}
.footer-tab{
  display:inline-flex;
  align-items:center;
  padding:.42rem .66rem;
  border:1px solid var(--line-soft);
  background:rgba(27,16,48,.75);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.footer-tab:hover{color:#160B00;background:var(--amber);border-color:var(--amber);}
.footer-sign__seal{
  display:flex;
  justify-content:space-between;
  gap:.6rem;
  margin:0;
  padding-top:.65rem;
  border-top:1px dashed var(--line-soft);
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.18em;
  color:rgba(184,168,217,.72);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(1rem,2.4vw,1.6rem);
}
.footer-block{min-width:0;}
.footer-title{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin:0 0 .7rem;
  padding-bottom:.5rem;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-display);
  font-size:.95rem;
  font-weight:800;
  letter-spacing:.1em;
  color:var(--white);
}
.footer-title span{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.1em;
  color:var(--amber);
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:.15rem;}
.footer-links a{
  display:inline-block;
  padding:.22rem 0 .22rem .85rem;
  position:relative;
  color:var(--mist);
  font-size:.9rem;
  text-decoration:none;
  transition:color .16s ease,transform .16s ease;
}
.footer-links a::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:5px;
  height:5px;
  background:var(--line);
  transform:rotate(45deg);
  transition:background .16s ease;
}
.footer-links a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-links a:hover::before{background:var(--cyan);}
.footer-block--contact{
  grid-column:1 / -1;
  display:grid;
  gap:.45rem;
  padding:.85rem 1rem;
  border:1px solid var(--line-soft);
  border-left:3px solid var(--violet);
  background:rgba(27,16,48,.6);
}
.footer-block--contact .footer-title{border-bottom:0;margin-bottom:.2rem;padding-bottom:0;}
.contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:.8rem;
  line-height:1.5;
  color:var(--white);
}
.contact-key{
  min-width:44px;
  font-size:9.5px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.contact-val{word-break:break-all;color:var(--white);}
.copy-btn{
  padding:.15rem .45rem;
  border:1px solid var(--line);
  background:rgba(139,92,246,.12);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.copy-btn:hover{color:var(--white);border-color:var(--violet);background:rgba(139,92,246,.26);}
.copy-btn.is-done{color:#160B00;background:var(--amber);border-color:var(--amber);}
.contact-hours{
  margin:.2rem 0 0;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-status{
  border-top:1px solid var(--line-soft);
  background:rgba(8,6,15,.65);
}
.footer-status__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55rem 1.2rem;
  padding-block:1rem;
}
.status-text{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin:0;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.status-dot{
  width:6px;
  height:6px;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
  transform:rotate(45deg);
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:rgba(184,168,217,.82);
}
.totop{
  margin-left:auto;
  padding:.35rem .62rem;
  border:1px solid var(--line);
  background:transparent;
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .16s ease,box-shadow .16s ease,color .16s ease;
}
.totop:hover{border-color:var(--cyan);box-shadow:0 0 18px -6px var(--cyan);color:var(--white);}

/* ---------- 7. 页头 / 面包屑 / 区块 ---------- */
.page-head{
  position:relative;
  padding-block:clamp(1.8rem,5vw,3.4rem) clamp(1rem,3vw,1.8rem);
}
.breadcrumb{
  margin-bottom:1rem;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:.45rem;}
.breadcrumb li + li::before{content:"/";color:var(--line);}
.breadcrumb a{color:var(--mist);text-decoration:none;}
.breadcrumb a:hover{color:var(--cyan);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin-bottom:.7rem;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.24em;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan);}
.section{padding-block:clamp(1.5rem,4vw,3rem);}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:1rem;
  margin-bottom:clamp(1rem,3vw,1.8rem);
  padding-bottom:.8rem;
  border-bottom:1px solid var(--line-soft);
}
.section__title{
  margin:0;
  font-size:clamp(1.6rem,3.2vw,2.6rem);
  font-weight:800;
}
.lede{
  max-width:62ch;
  color:var(--mist);
  font-size:clamp(1rem,1.4vw,1.1rem);
}
.hr{
  height:1px;
  border:0;
  margin-block:clamp(1.4rem,3vw,2.4rem);
  background:var(--line-soft);
}

/* ---------- 8. 网格 ---------- */
.grid{display:grid;gap:clamp(.8rem,2vw,1.2rem);}
.grid--2{grid-template-columns:repeat(2, minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3, minmax(0,1fr));}
.grid--split{grid-template-columns:minmax(0,1.65fr) minmax(0,1fr);}

/* ---------- 9. 档案卡 / 标签 / 数据条 / 提示条 ---------- */
.card{
  position:relative;
  padding:clamp(1rem,2.4vw,1.6rem);
  border:1px solid var(--line-soft);
  background:linear-gradient(160deg, rgba(27,16,48,.94), rgba(13,18,38,.94));
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.card::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:46px;
  height:3px;
  background:var(--violet);
}
.card--amber::before{background:var(--amber);}
.card--cyan::before{background:var(--cyan);}
.card:hover{
  border-color:rgba(139,92,246,.55);
  box-shadow:0 0 0 1px rgba(139,92,246,.18), 0 18px 40px -30px rgba(47,107,255,.9);
}
.card__index{
  display:block;
  margin-bottom:.45rem;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--mist);
}
.card__title{
  margin:0 0 .45rem;
  font-family:var(--font-display);
  font-size:1.15rem;
  font-weight:800;
  letter-spacing:.02em;
}
.card__text{
  margin:0;
  color:var(--mist);
  font-size:.93rem;
}
.tag-list{display:flex;flex-wrap:wrap;gap:.4rem;margin:0;padding:0;list-style:none;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.26rem .55rem;
  border:1px solid var(--line);
  background:rgba(139,92,246,.08);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  text-decoration:none;
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.tag:hover{color:var(--white);border-color:var(--violet);}
.tag--amber{color:var(--amber);border-color:rgba(255,176,32,.5);background:var(--amber-soft);}
.tag--cyan{color:var(--cyan);border-color:rgba(34,211,238,.5);background:var(--cyan-soft);}
.tag--violet{color:#CBBAFF;border-color:rgba(139,92,246,.55);background:var(--violet-soft);}
.meter{display:grid;gap:.4rem;}
.meter__meta{
  display:flex;
  justify-content:space-between;
  gap:.6rem;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.meter__bar{
  position:relative;
  height:6px;
  overflow:hidden;
  background:rgba(58,42,90,.65);
}
.meter__bar span{
  position:absolute;
  inset:0 auto 0 0;
  width:0;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  box-shadow:0 0 12px rgba(34,211,238,.55);
}
.meter--amber .meter__bar span{
  background:linear-gradient(90deg,var(--amber),#FF7A18);
  box-shadow:0 0 12px rgba(255,176,32,.55);
}
.note-strip{
  display:grid;
  gap:.32rem;
  padding:1rem 1.1rem;
  border:1px solid var(--line-soft);
  border-left:4px solid var(--amber);
  background:linear-gradient(90deg, rgba(255,176,32,.10), rgba(27,16,48,.72) 48%);
}
.note-strip__label{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.22em;
  color:var(--amber);
}
.index-list{
  margin:0;
  padding:0;
  list-style:none;
  border-top:1px solid var(--line-soft);
}
.index-list > li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:.9rem;
  align-items:baseline;
  padding:.8rem .2rem;
  border-bottom:1px solid var(--line-soft);
}
.index-list a{color:var(--white);text-decoration:none;}
.index-list a:hover{color:var(--cyan);}
.index-list__num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--amber);
}
.index-list__meta{
  font-family:var(--font-mono);
  font-size:10.5px;
  color:var(--mist);
}
.fold{
  border:1px solid var(--line-soft);
  background:rgba(27,16,48,.6);
}
.fold + .fold{margin-top:.5rem;}
.fold summary{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:1rem;
  padding:.85rem 1rem;
  font-weight:700;
  cursor:pointer;
  list-style:none;
  transition:background .16s ease,color .16s ease;
}
.fold summary::-webkit-details-marker{display:none;}
.fold summary::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--amber);
}
.fold[open] summary::after{content:"–";}
.fold summary:hover{background:rgba(139,92,246,.14);}
.fold__body{
  padding:0 1rem 1rem;
  color:var(--mist);
  font-size:.94rem;
}
.stat{display:grid;gap:.15rem;}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(1.5rem,3.2vw,2.4rem);
  line-height:1.1;
  color:var(--amber);
  letter-spacing:-.01em;
}

/* ---------- 10. 图片容器（供页面阶段放图） ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:1px solid var(--line-soft);
  background-image:
    linear-gradient(135deg, rgba(139,92,246,.34), rgba(47,107,255,.18) 46%, rgba(34,211,238,.16)),
    linear-gradient(180deg, var(--panel), var(--deep));
}
.media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg, rgba(8,6,15,.34) 0 1px, transparent 1px 4px);
  opacity:.55;
}
.media--wide{aspect-ratio:21 / 9;}
.media--tall{aspect-ratio:3 / 4;}
.media--square{aspect-ratio:1 / 1;}
.media__tag{
  position:absolute;
  left:0;
  top:0;
  z-index:2;
  padding:.34rem .6rem;
  background:var(--amber);
  color:#160B00;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.16em;
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:1.8rem .9rem .7rem;
  background:linear-gradient(180deg, transparent, rgba(8,6,15,.92));
  color:var(--white);
  font-size:.8rem;
  line-height:1.5;
}

/* ---------- 11. 滚动进度与显现 ---------- */
.scroll-progress{
  position:fixed;
  left:0;
  bottom:0;
  z-index:200;
  width:0;
  height:2px;
  pointer-events:none;
  background:linear-gradient(90deg,var(--violet),var(--blue),var(--cyan),var(--amber));
  box-shadow:0 0 12px rgba(139,92,246,.7);
}
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease, transform .5s cubic-bezier(.2,.7,.2,1);
}
.has-reveal [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 12. 响应式 ---------- */
@media (min-width:900px){
  body{background-attachment:fixed;}
}
@media (max-width:1180px){
  .nav-index{display:none;}
  .nav-link{padding:.55rem .45rem;font-size:.87rem;}
}
@media (max-width:1023px){
  .footer-top{grid-template-columns:1fr;}
  .footer-sign{grid-template-columns:minmax(0,1fr);}
  .footer-line{max-width:44ch;}
}
@media (max-width:980px){
  html{scroll-padding-top:104px;}
  .rail-note{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{
    position:absolute;
    left:calc(var(--pad) * -1);
    right:calc(var(--pad) * -1);
    top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:.7rem;
    margin-left:0;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
    padding:.85rem var(--pad) 1.15rem;
    border-bottom:1px solid var(--line);
    border-top:1px solid var(--line-soft);
    background:linear-gradient(180deg, #140A28, #09060F);
    box-shadow:0 28px 48px -28px #000;
  }
  .nav-wrap[data-open]{display:flex;animation:navDrop .18s ease both;}
  @keyframes navDrop{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;width:100%;}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:.8rem .75rem;
    font-size:1rem;
    border-left:2px solid transparent;
    background:rgba(139,92,246,.06);
  }
  .nav-index{display:inline-block;font-size:10px;color:var(--amber);}
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{border-left-color:var(--amber);}
  .header-actions{width:100%;margin-top:.35rem;}
  .header-actions .btn{width:100%;}
}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2, minmax(0,1fr));}
  .grid--split{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .footer-grid{grid-template-columns:repeat(2, minmax(0,1fr));}
  .footer-block--contact{grid-column:1 / -1;}
  .footer-sign__seal{flex-direction:column;gap:.2rem;}
  .footer-status__inner{flex-direction:column;align-items:flex-start;gap:.5rem;}
  .totop{margin-left:0;}
}
@media (max-width:640px){
  html{scroll-padding-top:96px;}
  .header-bar__inner{min-height:62px;}
  .brand-name{font-size:.98rem;}
  .brand-tag{font-size:9px;letter-spacing:.1em;}
  .grid--2,
  .grid--3{grid-template-columns:1fr;}
  .section__head{align-items:flex-start;}
  .index-list > li{grid-template-columns:auto minmax(0,1fr);}
  .index-list__meta{grid-column:2;justify-self:start;}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr;}
  .contact-line{gap:.35rem;}
  .contact-val{font-size:.76rem;}
  .media--wide{aspect-ratio:16 / 10;}
}

/* ---------- 13. 减少动态 ---------- */
@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;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none;}
  .nav-wrap[data-open]{animation:none;}
}