/* ===========================================================
   米乐看台 · Site Kit 共享样式 /assets/site.css
   母题：夜赛看台 · 分层台阶 · 记分牌数字
   =========================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
img,svg,video,canvas{display:block;max-width:100%}
button{background:none;border:0;padding:0;cursor:pointer;font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
hr{border:0}
::selection{background:var(--amber);color:var(--carbon)}

/* ---------- 2. Tokens ---------- */
:root{
  --night:#0B1B2B;
  --night-soft:#122A3F;
  --carbon:#11161C;
  --danxia:#B4442A;
  --danxia-deep:#7E2B1C;
  --pitch:#1F7A5A;
  --amber:#F2B33D;
  --volt:#34E0C4;
  --violet:#7A5AF8;
  --mist:#C9D2DA;
  --paper:#F4F1EA;
  --ink:#11161C;
  --ink-soft:#3C4753;

  --line-dark:rgba(201,210,218,.18);
  --line-light:rgba(17,22,28,.13);

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

  --rail-w:92px;
  --bar-h:58px;
  --radius:2px;
  --shadow-soft:0 1px 0 rgba(17,22,28,.05),0 14px 32px -26px rgba(17,22,28,.6);
  --ease:cubic-bezier(.32,.72,.28,1);
  --dur:180ms;
}

/* ---------- 3. Base / 中文排版 ---------- */
html{background:var(--paper)}
body{
  background-color:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.72;
  letter-spacing:.004em;
  min-height:100vh;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.04;
  letter-spacing:-.012em;
  color:inherit;
}
h1{font-size:clamp(2.6rem,5vw,4.6rem)}
h2{font-size:clamp(1.8rem,3vw,2.8rem)}
h3{font-size:clamp(1.15rem,1.6vw,1.5rem);line-height:1.2}
p{max-width:72ch}
strong,b{font-weight:700}
#main-content{display:block;scroll-margin-top:calc(var(--bar-h) + 14px)}

/* 键盘焦点：电光青外环 */
:where(a,button,summary,input,textarea,select,[tabindex]):focus-visible{
  outline:2px solid var(--volt);
  outline-offset:3px;
  border-radius:2px;
}
.on-dark :where(a,button):focus-visible{outline-color:var(--amber)}

/* ---------- 4. 页面骨架偏移 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
@media (max-width:1023px){
  body{padding-top:var(--bar-h)}
}
body.is-nav-open{overflow:hidden}

/* ---------- 5. Skip link ---------- */
.skip-link{
  position:fixed;
  top:6px;
  left:6px;
  z-index:400;
  padding:.7em 1.1em;
  background:var(--amber);
  color:var(--carbon);
  font-family:var(--font-mono);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.08em;
  border-radius:2px;
  box-shadow:0 8px 22px -14px rgba(0,0,0,.9);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus-visible{transform:translateY(0);outline-color:var(--night)}

/* ---------- 6. Header / 看台轨道 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:120;
  display:flex;
  flex-direction:column;
  color:var(--mist);
  background:
    linear-gradient(180deg,#0B1B2B 0%,#0D2133 52%,#11161C 100%);
  border-right:1px solid var(--line-dark);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(244,241,234,.055) 0 1px,transparent 1px 58px);
  opacity:.9;
}
.rail__bar{
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.75rem;
  padding:1.05rem .35rem .85rem;
  border-bottom:1px solid var(--line-dark);
}
.rail__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.6rem;
  padding:.2rem;
  border-radius:2px;
}
.rail__brand-mark{
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  background:var(--danxia);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.95rem;
  font-weight:700;
  border-radius:2px;
  box-shadow:3px 3px 0 0 var(--amber);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.rail__brand:hover .rail__brand-mark{background:var(--danxia-deep);box-shadow:3px 3px 0 0 var(--volt)}
.rail__brand-text{
  writing-mode:vertical-rl;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.02rem;
  letter-spacing:.22em;
  color:var(--paper);
}
.rail__brand-tag{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:.56rem;
  letter-spacing:.3em;
  color:var(--volt);
  text-transform:uppercase;
}
.rail__toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.42rem .7rem;
  border:1px solid rgba(201,210,218,.4);
  border-radius:2px;
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  transition:border-color var(--dur),color var(--dur),background var(--dur);
}
.rail__toggle:hover{border-color:var(--volt);color:var(--volt)}
.rail__toggle-bars{
  width:16px;
  height:14px;
  background-image:repeating-linear-gradient(180deg,currentColor 0 2px,transparent 2px 6px);
  transition:opacity var(--dur);
}
.rail__toggle-label{line-height:1}

.rail__scrim{display:none}

.rail__nav{
  position:relative;
  z-index:1;
  flex:1 1 auto;
  min-height:0;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  overflow-y:auto;
  scrollbar-width:thin;
  padding:.6rem 0 .5rem;
}
.rail__list{display:flex;flex-direction:column;gap:2px;width:100%}
.rail__item{width:100%}
.rail__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.42rem;
  padding:.55rem .3rem;
  border-left:3px solid transparent;
  color:var(--mist);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.rail__idx{
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.1em;
  color:rgba(201,210,218,.55);
  transition:color var(--dur);
}
.rail__label{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:.76rem;
  letter-spacing:.14em;
  line-height:1.25;
}
.rail__link:hover{background:rgba(126,43,28,.6);color:var(--paper)}
.rail__link:hover .rail__idx{color:var(--amber)}
.rail__link[aria-current="page"]{
  background:var(--danxia);
  border-left-color:var(--amber);
  color:#fff;
}
.rail__link[aria-current="page"] .rail__idx{color:var(--amber)}

.rail__foot{
  display:flex;
  flex-direction:column;
  align-items:stretch;
  gap:.55rem;
  padding:.85rem .5rem .4rem;
  margin-top:.8rem;
  border-top:1px solid var(--line-dark);
}
.rail__cta{
  display:block;
  text-align:center;
  padding:.6rem .2rem;
  background:var(--amber);
  color:var(--carbon);
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.1em;
  border-radius:2px;
  transition:background var(--dur),transform var(--dur) var(--ease);
}
.rail__cta:hover{background:var(--volt);transform:translateY(-1px)}
.rail__util{
  text-align:center;
  font-size:.68rem;
  line-height:1.5;
  color:var(--mist);
  text-decoration:underline;
  text-decoration-color:rgba(52,224,196,.55);
  text-underline-offset:3px;
  padding:.2rem;
  transition:color var(--dur);
}
.rail__util:hover{color:var(--volt)}
.rail__top{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  color:rgba(201,210,218,.65);
  padding:.35rem .2rem;
  border-top:1px dashed rgba(201,210,218,.22);
  transition:color var(--dur);
}
.rail__top:hover,.rail__top.is-visible{color:var(--amber)}

.rail__meter{
  position:absolute;
  top:0;
  right:0;
  width:3px;
  height:100%;
  background:rgba(201,210,218,.1);
  z-index:2;
  pointer-events:none;
}
.rail__meter-fill{
  display:block;
  width:100%;
  height:0;
  background:linear-gradient(180deg,var(--volt),var(--amber) 55%,var(--danxia));
}

/* ---------- 7. Footer / 看台收束 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(2rem,5vw,4rem);
  padding:clamp(2.4rem,5vw,4.5rem) clamp(1.1rem,4vw,3.5rem) clamp(1.4rem,3vw,2.2rem);
  color:var(--mist);
  background:
    radial-gradient(120% 80% at 6% 0%,rgba(180,68,42,.3),transparent 56%),
    linear-gradient(180deg,#0B1B2B 0%,#0D2133 46%,#11161C 100%);
  border-top:1px solid rgba(242,179,61,.32);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:6px;
  background:linear-gradient(90deg,var(--danxia) 0 34%,var(--amber) 34% 62%,var(--pitch) 62% 100%);
}
.site-footer::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:72px;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(244,241,234,.05) 0 1px,transparent 1px 18px);
}
.footer__mast{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:1.4rem 2rem;
  max-width:1260px;
  margin:0 auto;
}
.footer__brandline{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.45rem,3.4vw,2.7rem);
  line-height:1.12;
  letter-spacing:-.01em;
  color:var(--paper);
  max-width:24ch;
}
.footer__brandline-dot{color:var(--amber);padding:0 .3em}
.footer__chips{display:flex;flex-wrap:wrap;gap:.5rem}
.footer__chip{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  color:var(--mist);
  padding:.34rem .7rem;
  border:1px solid var(--line-dark);
  border-radius:2px;
  background:rgba(244,241,234,.04);
}
.footer__cols{
  position:relative;
  z-index:1;
  max-width:1260px;
  margin:clamp(1.8rem,3.6vw,3rem) auto 0;
  padding-top:clamp(1.5rem,3vw,2.4rem);
  border-top:1px solid var(--line-dark);
  display:grid;
  grid-template-columns:1fr 1fr .9fr 1.6fr;
  gap:clamp(1.5rem,3vw,3rem);
}
.footer__coltitle{
  display:flex;
  align-items:center;
  gap:.55rem;
  margin-bottom:.9rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--amber);
}
.footer__coltitle::before{
  content:"";
  width:7px;
  height:7px;
  background:var(--danxia);
  flex:0 0 auto;
}
.footer__list{display:flex;flex-direction:column;gap:.1rem}
.footer__link{
  display:inline-block;
  padding:.26rem 0;
  font-size:.92rem;
  color:var(--mist);
  box-shadow:inset 0 -1px 0 rgba(201,210,218,0);
  transition:color var(--dur),box-shadow var(--dur);
}
.footer__link:hover{color:var(--paper);box-shadow:inset 0 -1px 0 var(--volt)}
.footer__contact-line{
  font-size:.9rem;
  line-height:1.78;
  color:var(--mist);
  overflow-wrap:anywhere;
  max-width:34ch;
}
.footer__note{
  margin-top:.65rem;
  font-size:.8rem;
  line-height:1.7;
  color:rgba(201,210,218,.72);
  max-width:36ch;
}
.footer__legal{
  position:relative;
  z-index:1;
  max-width:1260px;
  margin:clamp(1.8rem,3vw,2.6rem) auto 0;
  padding-top:1rem;
  border-top:1px solid var(--line-dark);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:.5rem 1.6rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  color:rgba(201,210,218,.72);
}
.footer__copy{max-width:none}
.footer__icp{max-width:none;color:rgba(242,179,61,.85)}

/* ---------- 8. 布局容器与分区 ---------- */
.container{
  width:100%;
  max-width:1260px;
  margin-inline:auto;
  padding-inline:clamp(1.1rem,4vw,3.5rem);
}
.container--tight{max-width:900px}
.section{position:relative;padding-block:clamp(2.8rem,6vw,5.5rem)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--night{background:var(--night);color:var(--mist)}
.section--danxia{background:var(--danxia-deep);color:var(--paper)}

/* ---------- 9. 文字层级 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(3.4rem,7vw,7.5rem);
  line-height:.92;
  letter-spacing:-.018em;
}
.section-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2rem,3.6vw,3.8rem);
  line-height:1;
  letter-spacing:-.012em;
}
.subtitle{font-size:clamp(1.02rem,1.4vw,1.24rem);font-weight:600;line-height:1.4}
.lede{
  font-size:clamp(1rem,1.2vw,1.14rem);
  line-height:1.78;
  color:var(--ink-soft);
  max-width:62ch;
}
.section--night .lede,.section--danxia .lede{color:var(--mist)}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--danxia);
}
.kicker::before{content:"";width:22px;height:2px;background:currentColor}
.section--night .kicker,.section--danxia .kicker{color:var(--amber)}
.num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  font-size:clamp(2.8rem,6vw,6rem);
  line-height:.9;
  letter-spacing:-.02em;
  color:var(--amber);
  text-shadow:2px 0 0 rgba(180,68,42,.62),-2px 0 0 rgba(52,224,196,.3);
}
.num--sm{font-size:clamp(1.4rem,2.2vw,2.1rem);text-shadow:1px 0 0 rgba(180,68,42,.55),-1px 0 0 rgba(52,224,196,.28)}
.num--ink{color:var(--danxia);text-shadow:1px 0 0 rgba(11,27,43,.28),-1px 0 0 rgba(242,179,61,.5)}

/* ---------- 10. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
  min-height:44px;
  padding:.7em 1.35em;
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.1em;
  border:1px solid transparent;
  border-radius:var(--radius);
  background:var(--danxia);
  color:#fff;
  transition:background var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur),color var(--dur);
}
.btn:hover{background:var(--danxia-deep);transform:translateY(-1px)}
.btn:active{transform:none}
.btn--amber{background:var(--amber);color:var(--carbon)}
.btn--amber:hover{background:#FFC75A;color:var(--carbon)}
.btn--ghost{background:transparent;color:var(--paper);border-color:rgba(244,241,234,.45)}
.btn--ghost:hover{background:rgba(244,241,234,.1);border-color:var(--volt);color:#fff}
.btn--quiet{
  min-height:0;
  padding:.15em 0;
  background:none;
  border:0;
  border-bottom:1px solid currentColor;
  border-radius:0;
  font-family:var(--font-body);
  font-size:.95rem;
  letter-spacing:.02em;
  color:var(--danxia);
}
.btn--quiet:hover{background:none;transform:none;color:var(--danxia-deep)}
.section--night .btn--quiet,.section--danxia .btn--quiet{color:var(--volt)}
.section--night .btn--quiet:hover{color:var(--amber)}

/* ---------- 11. 看板面板 ---------- */
.panel{
  background:#fff;
  border:1px solid var(--line-light);
  border-radius:var(--radius);
  padding:clamp(1.1rem,2.4vw,2rem);
  box-shadow:var(--shadow-soft);
}
.panel--paper{background:var(--paper)}
.panel--night{background:var(--night);color:var(--mist);border-color:var(--line-dark);box-shadow:none}
.panel--ochre{background:var(--danxia);color:#fff;border-color:transparent;box-shadow:none}
.panel--flat{background:transparent;border:1px solid var(--line-light);box-shadow:none}
.section--night .panel--flat{border-color:var(--line-dark)}

/* ---------- 12. 栅格 ---------- */
.grid{display:grid;gap:clamp(1rem,2.2vw,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(0,7fr) minmax(0,4fr)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}

/* ---------- 13. 图片容器基础规则 ---------- */
.media{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--radius);
  aspect-ratio:16/10;
  background:linear-gradient(152deg,#0B1B2B 0%,#1D3A4D 46%,#7E2B1C 130%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(11,27,43,.16) 0 1px,transparent 1px 4px);
  opacity:.55;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:
    radial-gradient(120% 95% at 72% 3%,rgba(242,179,61,.22),transparent 62%),
    radial-gradient(90% 70% at 6% 98%,rgba(31,122,90,.34),transparent 70%),
    radial-gradient(140% 110% at 50% 50%,transparent 52%,rgba(17,22,28,.42) 100%);
  mix-blend-mode:screen;
}
.media__img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.94) contrast(1.05);
}
.media--wide{aspect-ratio:21/9}
.media--portrait{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media__caption{
  margin-top:.6rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--ink-soft);
}
.section--night .media__caption,.section--danxia .media__caption{color:rgba(201,210,218,.76)}

/* ---------- 14. 面包屑 ---------- */
.breadcrumb{
  padding-block:.9rem;
  border-bottom:1px solid var(--line-light);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--ink-soft);
}
.section--night .breadcrumb{border-color:var(--line-dark);color:rgba(201,210,218,.8)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.55rem}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--danxia)}
.breadcrumb__link{color:inherit;box-shadow:inset 0 -1px 0 rgba(17,22,28,.25);transition:color var(--dur),box-shadow var(--dur)}
.breadcrumb__link:hover{color:var(--danxia);box-shadow:inset 0 -1px 0 var(--danxia)}
.breadcrumb__item[aria-current="page"]{color:var(--danxia)}
.section--night .breadcrumb__item[aria-current="page"]{color:var(--amber)}

/* ---------- 15. 新手三步反馈条 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  background:var(--line-light);
  border:1px solid var(--line-light);
  border-radius:var(--radius);
  overflow:hidden;
}
.steps__item{
  display:flex;
  align-items:flex-start;
  gap:.75rem;
  padding:1rem 1.1rem;
  background:var(--paper);
}
.steps__dot{
  flex:0 0 auto;
  width:26px;
  height:26px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:var(--night);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
}
.steps__text{font-size:.92rem;line-height:1.62;max-width:34ch}
.steps__title{
  display:block;
  margin-bottom:.15rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  color:var(--danxia);
}
.section--night .steps{background:var(--line-dark);border-color:var(--line-dark)}
.section--night .steps__item{background:var(--night);color:var(--mist)}
.section--night .steps__dot{background:var(--amber);color:var(--carbon)}
.section--night .steps__title{color:var(--volt)}

/* ---------- 16. 索引行 ---------- */
.index-list{border-top:1px solid var(--line-light)}
.index-list__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:1rem;
  align-items:baseline;
  padding:.85rem .2rem;
  border-bottom:1px solid var(--line-light);
  transition:background var(--dur) var(--ease);
}
.index-list__item:hover{background:rgba(180,68,42,.07)}
.section--night .index-list,.section--night .index-list__item{border-color:var(--line-dark)}
.section--night .index-list__item:hover{background:rgba(242,179,61,.08)}
.index-list__num{
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  color:var(--danxia);
  letter-spacing:.06em;
}
.section--night .index-list__num{color:var(--amber)}
.index-list__label{font-size:.98rem;line-height:1.55}
.index-list__meta{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--ink-soft);
}
.section--night .index-list__meta{color:rgba(201,210,218,.75)}

/* ---------- 17. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.3rem .62rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  line-height:1.2;
  color:var(--danxia);
  border:1px solid currentColor;
  border-radius:999px;
}
.tag--violet{color:var(--violet)}
.tag--pitch{color:var(--pitch)}
.tag--amber{color:#9A6C13}
.section--night .tag{color:var(--amber)}
.section--night .tag--violet{color:#A896FF}
.section--night .tag--pitch{color:#4FD3A6}
.section--night .tag--amber{color:var(--amber)}

/* ---------- 18. 其他工具类 ---------- */
.rule{height:1px;background:var(--line-light);margin-block:clamp(1.5rem,3vw,2.5rem)}
.section--night .rule,.section--danxia .rule{background:var(--line-dark)}
.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;
}

/* ---------- 19. 滚动显现 ---------- */
[data-reveal]{transition:opacity .5s var(--ease),transform .5s var(--ease)}
html[data-reveal="on"] [data-reveal]:not(.is-in){opacity:0;transform:translateY(16px)}

/* ---------- 20. 平板 ---------- */
@media (max-width:1100px){
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .span-4,.span-5,.span-7,.span-8{grid-column:span 6}
  .footer__cols{grid-template-columns:1fr 1fr;gap:1.8rem 2.4rem}
  .footer__col--contact{grid-column:1 / -1}
  .footer__contact-line{max-width:52ch}
  .footer__note{max-width:60ch}
}

/* ---------- 21. 手机 / 移动抽屉 ---------- */
@media (max-width:1023px){
  .site-header{
    inset:0 0 auto 0;
    width:auto;
    height:var(--bar-h);
    flex-direction:row;
    align-items:center;
    border-right:0;
    border-bottom:1px solid var(--line-dark);
    box-shadow:0 12px 26px -22px rgba(0,0,0,.9);
  }
  .site-header::before{background-image:none}
  .rail__bar{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    width:100%;
    gap:1rem;
    padding:0 1rem;
    border-bottom:0;
  }
  .rail__brand{flex-direction:row;align-items:center;gap:.65rem;padding:0}
  .rail__brand-mark{width:30px;height:30px;font-size:.78rem;box-shadow:2px 2px 0 0 var(--amber)}
  .rail__brand-text{writing-mode:horizontal-tb;font-size:1rem;letter-spacing:.14em}
  .rail__brand-tag{display:none}
  .rail__toggle{display:inline-flex}

  .rail__scrim{
    display:block;
    position:fixed;
    inset:var(--bar-h) 0 0 0;
    background:rgba(11,27,43,.62);
    opacity:0;
    pointer-events:none;
    transition:opacity var(--dur) var(--ease);
    z-index:100;
  }
  .site-header[data-open="true"] .rail__scrim{opacity:1;pointer-events:auto}

  .rail__nav{
    position:fixed;
    top:var(--bar-h);
    left:0;
    width:min(86vw,340px);
    height:calc(100vh - var(--bar-h));
    height:calc(100dvh - var(--bar-h));
    padding:1rem .9rem 1.6rem;
    overflow-y:auto;
    background:linear-gradient(180deg,#0B1B2B 0%,#11161C 100%);
    border-right:1px solid var(--line-dark);
    box-shadow:24px 0 48px -34px rgba(0,0,0,.95);
    transform:translateX(-104%);
    transition:transform .22s var(--ease);
    z-index:110;
  }
  .site-header[data-open="true"] .rail__nav{transform:translateX(0)}
  .site-header[data-open="true"] .rail__toggle{
    border-color:var(--volt);
    color:var(--volt);
    background:rgba(52,224,196,.1);
  }

  .rail__list{gap:0}
  .rail__link{
    flex-direction:row;
    align-items:center;
    gap:.85rem;
    padding:.8rem .6rem;
    border-left:0;
    border-bottom:1px solid rgba(201,210,218,.1);
  }
  .rail__link[aria-current="page"]{border-left:0;box-shadow:inset 3px 0 0 var(--amber)}
  .rail__idx{font-size:.7rem;color:var(--amber)}
  .rail__label{writing-mode:horizontal-tb;font-size:.98rem;letter-spacing:.06em}
  .rail__foot{padding:.9rem .1rem .2rem;margin-top:1rem}
  .rail__cta{font-size:.78rem;padding:.75rem .4rem}
  .rail__util{font-size:.82rem;padding:.5rem}
  .rail__top{font-size:.74rem;padding:.6rem .2rem;border-top:1px solid rgba(201,210,218,.16)}
  .rail__meter{display:none}

  body.is-nav-open{overflow:hidden}
  #main-content{scroll-margin-top:calc(var(--bar-h) + 10px)}
}

@media (max-width:760px){
  body{font-size:16px}
  .grid--2,.grid--3,.grid--12{grid-template-columns:minmax(0,1fr)}
  .span-4,.span-5,.span-7,.span-8{grid-column:1 / -1}
  .steps{grid-template-columns:minmax(0,1fr)}
  .footer__cols{grid-template-columns:1fr;gap:1.6rem}
  .footer__col--contact{grid-column:auto}
  .footer__legal{flex-direction:column;gap:.45rem}
  .index-list__item{grid-template-columns:auto minmax(0,1fr);row-gap:.3rem}
  .index-list__meta{grid-column:2}
}

/* ---------- 22. 尊重减少动效 ---------- */
@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;
  }
  [data-reveal]{transition:none}
  html[data-reveal="on"] [data-reveal]:not(.is-in){opacity:1;transform:none}
  .btn:hover,.rail__cta:hover{transform:none}
}