/* ==========================================================================
   安装指南 · 娱乐神殿 HD
   共享站样式表 — /assets/site.css
   深空黑 / 面板墨 / 暗金 / 霓虹青 / 品红
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --void:#06060A;
  --panel:#0E0E16;
  --panel-2:#0B0B12;
  --line:#262936;
  --gold:#C8A02A;
  --gold-glow:#F1D585;
  --cyan:#33D9CE;
  --magenta:#DC4A87;
  --mist:#98A0B0;
  --paper:#E9EBF2;
  --indigo:#16203C;

  --line-soft:rgba(38,41,54,.62);
  --gold-a06:rgba(200,160,42,.06);
  --gold-a10:rgba(200,160,42,.10);
  --gold-a20:rgba(200,160,42,.20);
  --gold-a40:rgba(200,160,42,.40);
  --cyan-a10:rgba(51,217,206,.10);
  --cyan-a20:rgba(51,217,206,.20);
  --magenta-a12:rgba(220,74,135,.12);

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

  --wrap:1240px;
  --gutter:clamp(18px,4vw,52px);
  --header-h:64px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:calc(var(--header-h) + 20px);
}
html.nav-open{overflow:hidden;}

body{
  margin:0;
  min-height:100vh;
  background-color:var(--void);
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(22,32,60,.92), transparent 68%),
    radial-gradient(760px 440px at 106% 3%, rgba(200,160,42,.075), transparent 62%),
    linear-gradient(to right, rgba(38,41,54,.26) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(38,41,54,.26) 1px, transparent 1px);
  background-size:auto,auto,84px 84px,84px 84px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

img,svg,video{display:block;max-width:100%;}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;border-spacing:0;}
input,select,textarea{font:inherit;color:inherit;}

:focus-visible{
  outline:2px solid var(--gold-glow);
  outline-offset:3px;
  border-radius:1px;
}

/* ---------- 3. 通用容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.site-main{display:block;padding-top:var(--header-h);}

.grid{display:grid;gap:clamp(18px,2.4vw,30px);}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}

.mono{font-family:var(--font-mono);}
.mist{color:var(--mist);}
.text-gold{color:var(--gold-glow);}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  transform:translateY(-180%);
  padding:10px 18px;
  background:var(--gold);
  color:#08080C;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  border-radius:var(--radius);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .32s var(--ease),border-color .32s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(14,14,22,.94);
  border-bottom-color:var(--line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.site-header__inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:12px 0;
  flex:none;
}
.brand__mark{
  position:relative;
  width:20px;height:20px;
  flex:none;
  border:1px solid var(--gold);
  background:linear-gradient(135deg,var(--gold-a10),transparent 72%);
  transform:rotate(45deg);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:5px;
  background:var(--gold);
  opacity:.9;
  transition:background-color .24s var(--ease);
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark{
  border-color:var(--gold-glow);
  box-shadow:0 0 16px rgba(200,160,42,.45);
}
.brand:hover .brand__mark::after,
.brand:focus-visible .brand__mark::after{background:var(--gold-glow);}

.brand__text{display:flex;flex-direction:column;line-height:1.12;}
.brand__name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  letter-spacing:.03em;
  color:var(--paper);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
  margin-top:3px;
}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 13px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(14,14,22,.66);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-glow);}
.nav-toggle__bars{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:16px;
  height:14px;
}
.nav-toggle__bars span{
  display:block;
  height:1px;
  width:100%;
  background:currentColor;
  transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
.nav-toggle__label{white-space:nowrap;}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:20px;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__item{display:block;}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  font-size:14.5px;
  line-height:1.4;
  letter-spacing:.02em;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:11px;right:11px;bottom:3px;
  height:1px;
  background:linear-gradient(90deg,var(--gold),var(--gold-glow));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--paper);}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--gold-glow);}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--gold);
}

/* 头部行动按钮 */
.header-cta{
  display:inline-flex;
  align-items:center;
  gap:9px;
  flex:none;
  padding:10px 18px;
  border:1px solid var(--gold);
  border-radius:var(--radius);
  background:linear-gradient(180deg,var(--gold-a10),rgba(200,160,42,.03));
  color:var(--gold-glow);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  white-space:nowrap;
  transition:background-color .22s var(--ease),box-shadow .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.header-cta__arrow{
  display:inline-block;
  transition:transform .22s var(--ease);
}
.header-cta:hover,
.header-cta:focus-visible{
  color:#FFF6DA;
  border-color:var(--gold-glow);
  background:linear-gradient(180deg,var(--gold-a20),rgba(200,160,42,.06));
  box-shadow:0 10px 26px -16px rgba(200,160,42,.7);
}
.header-cta:hover .header-cta__arrow,
.header-cta:focus-visible .header-cta__arrow{transform:translateX(4px);}

/* 进度线 */
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,var(--gold),var(--gold-glow) 46%,var(--cyan));
  transform:scaleX(0);
  transform-origin:left center;
  opacity:.95;
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(60px,9vw,140px);
  border-top:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(22,32,60,.55),rgba(6,6,10,0) 46%),
    var(--panel-2);
}

.site-footer__inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(42px,6vw,74px) var(--gutter) clamp(34px,4.6vw,58px);
  display:grid;
  grid-template-columns:1.3fr .8fr .8fr .8fr 1.35fr;
  gap:clamp(20px,3vw,40px);
  align-items:start;
}

/* 品牌块 */
.footer-brand{display:grid;gap:14px;align-content:start;}
.footer-brand__link{
  display:inline-flex;
  align-items:center;
  gap:12px;
}
.footer-brand__mark{
  position:relative;
  width:15px;height:15px;
  flex:none;
  border:1px solid var(--gold);
  transform:rotate(45deg);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.footer-brand__mark::after{
  content:"";
  position:absolute;
  inset:4px;
  background:var(--gold);
  transition:background-color .22s var(--ease);
}
.footer-brand__link:hover .footer-brand__mark{
  border-color:var(--gold-glow);
  box-shadow:0 0 14px rgba(200,160,42,.4);
}
.footer-brand__link:hover .footer-brand__mark::after{background:var(--gold-glow);}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:15.5px;
  letter-spacing:.02em;
  color:var(--paper);
}
.footer-brand__note{
  font-size:13.5px;
  line-height:1.75;
  color:var(--mist);
  max-width:34ch;
}

/* 链接分栏 */
.footer-col{display:grid;align-content:start;}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:400;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
  padding-bottom:11px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.footer-col__list{display:grid;gap:2px;}

.footer-link{
  position:relative;
  display:inline-block;
  padding:5px 0;
  font-size:14.5px;
  line-height:1.6;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;bottom:2px;
  width:100%;height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible{color:var(--paper);}
.footer-link:hover::after,
.footer-link:focus-visible::after{transform:scaleX(1);}
.footer-link--sm{font-size:13px;letter-spacing:.02em;}

/* 联系信息 */
.footer-contact{display:grid;align-content:start;}
.footer-contact__list{display:grid;gap:13px;}
.footer-contact__row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-contact__val{
  font-size:14px;
  line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}
.footer-contact__val--mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--cyan);
}

/* 底部细条 */
.footer-bar{border-top:1px solid var(--line);}
.footer-bar__inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:20px var(--gutter) 32px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 30px;
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--mist);
}
.footer-legal__links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
  align-items:center;
}

/* ---------- 7. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(14,14,22,.7);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.12em;
  line-height:1.2;
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover,
.btn:focus-visible{
  border-color:var(--gold);
  color:var(--gold-glow);
  box-shadow:0 12px 30px -22px rgba(200,160,42,.9);
}
.btn--gold{
  border-color:var(--gold);
  color:var(--gold-glow);
  background:linear-gradient(180deg,var(--gold-a20),rgba(200,160,42,.04));
}
.btn--gold:hover,
.btn--gold:focus-visible{
  color:#FFF6DA;
  border-color:var(--gold-glow);
  background:linear-gradient(180deg,rgba(200,160,42,.28),rgba(200,160,42,.08));
}
.btn--ghost{
  border-color:var(--line);
  color:var(--mist);
  background:transparent;
}
.btn--ghost:hover,
.btn--ghost:focus-visible{
  color:var(--paper);
  border-color:var(--cyan);
  box-shadow:0 12px 30px -24px rgba(51,217,206,.9);
}

/* ---------- 8. 面包屑与标题 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:9px;}
.breadcrumb__sep{color:var(--line);}
.breadcrumb__link{color:var(--mist);transition:color .2s var(--ease);}
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible{color:var(--gold-glow);}
.breadcrumb__current{color:var(--paper);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:currentColor;
  opacity:.75;
}

.section-head{position:relative;padding-left:20px;}
.section-head::before{
  content:"";
  position:absolute;
  left:0;top:.3em;
  width:2px;height:1.15em;
  background:linear-gradient(180deg,var(--gold),rgba(200,160,42,.15));
}
.section-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(24px,3vw,32px);
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--paper);
}
.section-sub{
  margin-top:12px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--mist);
  max-width:64ch;
}

/* ---------- 9. 正文排版 ---------- */
.prose{
  font-size:17px;
  line-height:1.85;
  color:var(--paper);
}
.prose > * + *{margin-top:1.1em;}
.prose h2{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(21px,2.4vw,27px);
  line-height:1.35;
  margin-top:2em;
  letter-spacing:-.01em;
}
.prose h3{
  font-family:var(--font-display);
  font-weight:700;
  font-size:18.5px;
  line-height:1.5;
  margin-top:1.7em;
}
.prose p{color:var(--paper);}
.prose a{
  color:var(--gold-glow);
  border-bottom:1px solid var(--gold-a40);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.prose a:hover,
.prose a:focus-visible{border-bottom-color:var(--gold-glow);}
.prose strong{color:var(--gold-glow);font-weight:700;}
.prose em{color:var(--mist);font-style:normal;}
.prose ul{display:grid;gap:10px;}
.prose ul > li{position:relative;padding-left:22px;}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  border:1px solid var(--gold);
  transform:rotate(45deg);
}
.prose ol{counter-reset:prose-n;display:grid;gap:10px;}
.prose ol > li{
  position:relative;
  padding-left:36px;
  counter-increment:prose-n;
}
.prose ol > li::before{
  content:counter(prose-n,decimal-leading-zero);
  position:absolute;
  left:0;top:.18em;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cyan);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.88em;
  color:var(--cyan);
  background:var(--cyan-a10);
  border:1px solid var(--cyan-a20);
  border-radius:var(--radius);
  padding:2px 6px;
}
.prose blockquote{
  border-left:2px solid var(--gold);
  padding-left:18px;
  color:var(--mist);
  font-size:16px;
}

/* ---------- 10. 索引数字 ---------- */
.index-num{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(64px,12vw,148px);
  line-height:.82;
  letter-spacing:-.04em;
  color:rgba(200,160,42,.32);
  display:block;
  user-select:none;
}
@supports (-webkit-text-stroke:1px #000){
  .index-num{
    color:transparent;
    -webkit-text-stroke:1px var(--gold);
  }
}

/* ---------- 11. 面板 ---------- */
.panel{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(14,14,22,.94),rgba(14,14,22,.55));
  padding:clamp(20px,3vw,32px);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.panel:hover{
  border-color:var(--gold-a40);
  box-shadow:0 18px 44px -34px rgba(200,160,42,.8);
}
.panel__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:18px;
  line-height:1.45;
  color:var(--paper);
}

/* ---------- 12. 标签 ---------- */
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(14,14,22,.6);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--mist);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.tag:hover{border-color:var(--gold-a40);color:var(--paper);}
.tag[aria-pressed="true"],
.tag[data-active]{
  border-color:var(--gold);
  color:var(--gold-glow);
  background:var(--gold-a06);
}

/* ---------- 13. 数据表 ---------- */
.data-table{
  width:100%;
  font-size:14.5px;
  line-height:1.7;
  text-align:left;
}
.data-table caption{
  text-align:left;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
  padding-bottom:12px;
}
.data-table th{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.data-table td{
  padding:14px;
  border-bottom:1px solid var(--line-soft);
  color:var(--paper);
  vertical-align:top;
}
.data-table tbody tr{transition:background-color .2s var(--ease);}
.data-table tbody tr:hover{background:var(--gold-a06);}
.data-table .num{
  font-family:var(--font-mono);
  color:var(--cyan);
  letter-spacing:.02em;
}

/* ---------- 14. 时间轴 ---------- */
.timeline{
  position:relative;
  padding-left:28px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:5px;top:8px;bottom:8px;
  width:1px;
  background:linear-gradient(180deg,var(--gold),var(--line) 58%,transparent);
}
.timeline__item{
  position:relative;
  padding-bottom:30px;
}
.timeline__item:last-child{padding-bottom:0;}
.timeline__item::before{
  content:"";
  position:absolute;
  left:-28px;top:9px;
  width:11px;height:11px;
  border:1px solid var(--gold);
  background:var(--void);
  transform:rotate(45deg);
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.timeline__item:hover::before{
  background:var(--gold);
  border-color:var(--gold-glow);
}
.timeline__date{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.timeline__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  line-height:1.5;
  margin-top:6px;
  color:var(--paper);
}

/* ---------- 15. 手风琴 ---------- */
.accordion{border-top:1px solid var(--line);}
.accordion__item{border-bottom:1px solid var(--line);}
.accordion__trigger{
  display:flex;
  align-items:flex-start;
  gap:16px;
  width:100%;
  padding:20px 4px;
  text-align:left;
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  line-height:1.55;
  color:var(--paper);
  transition:color .2s var(--ease);
}
.accordion__trigger:hover,
.accordion__trigger:focus-visible{color:var(--gold-glow);}
.accordion__sign{
  position:relative;
  margin-left:auto;
  margin-top:8px;
  flex:none;
  width:13px;height:13px;
}
.accordion__sign::before,
.accordion__sign::after{
  content:"";
  position:absolute;
  background:var(--gold);
  transition:transform .26s var(--ease),opacity .26s var(--ease);
}
.accordion__sign::before{left:0;right:0;top:50%;height:1px;}
.accordion__sign::after{top:0;bottom:0;left:50%;width:1px;}
.accordion__item[data-open] .accordion__sign::after{transform:scaleY(0);opacity:0;}
.accordion__panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .3s var(--ease);
}
.accordion__item[data-open] .accordion__panel{grid-template-rows:1fr;}
.accordion__panel > div{overflow:hidden;}
.accordion__panel p,
.accordion__panel ul{
  padding:0 4px 22px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--mist);
}

/* ---------- 16. 左侧纵向步骤轴 ---------- */
.step-rail{display:none;}

@media (min-width:1400px){
  .step-rail{
    position:fixed;
    left:26px;
    top:50%;
    transform:translateY(-50%);
    z-index:70;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:16px;
    padding:18px 10px;
    border:1px solid var(--line);
    border-radius:999px;
    background:rgba(11,11,18,.72);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
  }
  .step-rail__label{
    font-family:var(--font-mono);
    font-size:9.5px;
    letter-spacing:.2em;
    color:var(--mist);
    writing-mode:vertical-rl;
    text-transform:uppercase;
  }
  .step-rail__list{
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  .step-rail__link{
    position:relative;
    display:flex;
    align-items:center;
    gap:8px;
    padding:2px 2px;
    transition:color .2s var(--ease);
  }
  .step-rail__dot{
    display:block;
    width:7px;height:7px;
    border:1px solid var(--line);
    transform:rotate(45deg);
    background:transparent;
    transition:background-color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .step-rail__num{
    font-family:var(--font-mono);
    font-size:10.5px;
    letter-spacing:.08em;
    color:var(--mist);
    transition:color .22s var(--ease);
  }
  .step-rail__link:hover .step-rail__dot,
  .step-rail__link:focus-visible .step-rail__dot{border-color:var(--gold);}
  .step-rail__link:hover .step-rail__num,
  .step-rail__link:focus-visible .step-rail__num{color:var(--paper);}
  .step-rail__link[aria-current="true"] .step-rail__dot{
    background:var(--gold);
    border-color:var(--gold-glow);
    box-shadow:0 0 12px rgba(200,160,42,.7);
  }
  .step-rail__link[aria-current="true"] .step-rail__num{color:var(--gold-glow);}
}

/* ---------- 17. 图片容器 ---------- */
.figure{position:relative;margin:0;}
.figure__frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  aspect-ratio:16 / 10;
  background:
    linear-gradient(135deg,rgba(22,32,60,.92),rgba(6,6,10,.92)),
    var(--panel);
}
.figure__frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.9) contrast(1.06);
  transition:transform .5s var(--ease);
}
.figure:hover .figure__frame img{transform:scale(1.028);}
.figure__frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,rgba(6,6,10,0) 44%,rgba(6,6,10,.74) 100%),
    radial-gradient(120% 80% at 12% 0%,rgba(200,160,42,.14),transparent 62%);
}
.figure__frame[data-placeholder]::before{
  content:attr(data-placeholder);
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:22px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--mist);
}
.figure__cap{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--mist);
}
.figure--wide .figure__frame{aspect-ratio:21 / 9;}
.figure--tall .figure__frame{aspect-ratio:4 / 5;}
.figure--square .figure__frame{aspect-ratio:1 / 1;}

/* ---------- 18. 显现动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .24s ease-out,transform .24s ease-out;
}
[data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 19. 响应式 ---------- */
@media (min-width:861px) and (max-width:1100px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:1080px){
  .site-footer__inner{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .footer-contact{grid-column:1 / -1;}
}

@media (max-width:1000px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px var(--gutter) 26px;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    background:rgba(11,11,18,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 60px -40px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__item{border-bottom:1px solid var(--line-soft);}
  .site-nav__link{
    display:block;
    padding:16px 2px;
    font-size:16px;
    color:var(--paper);
  }
  .site-nav__link::after{display:none;}
  .site-nav__link[aria-current="page"]{
    color:var(--gold-glow);
    padding-left:14px;
  }
  .site-nav__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:6px;height:6px;
    margin-top:-3px;
    background:var(--gold);
    transform:rotate(45deg);
  }
  .header-cta{
    margin-top:22px;
    justify-content:center;
    padding:14px 20px;
  }
}

@media (max-width:860px){
  .grid-2,
  .grid-3{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:620px){
  :root{--header-h:60px;}
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr));}
  .brand__sub{letter-spacing:.16em;}
  .footer-bar__inner{flex-direction:column;align-items:flex-start;}
  .footer-legal__links{gap:6px 18px;}
  .data-table{font-size:13.5px;}
  .data-table th,
  .data-table td{padding:11px 8px;}
}

@media (max-width:420px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr);}
  .nav-toggle__label{display:none;}
}

/* ---------- 20. 降低动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    transition-delay:0ms!important;
    scroll-behavior:auto!important;
  }
  [data-reveal]{
    opacity:1!important;
    transform:none!important;
  }
  .scroll-progress{transition:none!important;}
}