/* =========================================================
   逸贝娱乐 · 共享站点样式  /assets/site.css
   暗场霓虹 + 印刷叠层：轨道导航、堆叠画板、仪表数字
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}

body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol,pre{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0A1220;
  --panel:#101B2E;
  --edge:#16233A;
  --cyan:#4FE3E0;
  --amber:#FFB45C;
  --coral:#FF7A8A;
  --paper:#F2E9DA;
  --mist:#A8B6C8;
  --teal:#2A7F86;
  --haze:#12303F;

  --rail-w:96px;
  --gutter:clamp(18px,4vw,48px);
  --measure:68ch;

  --font-display:'Barlow Condensed','HarmonyOS Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','PingFang SC','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',SFMono-Regular,Consolas,'Courier New',monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --radius:3px;
}

/* ---------- 3. 基础排版 ---------- */
body{
  background:
    radial-gradient(120% 80% at 82% -10%, rgba(18,48,63,.65), transparent 62%),
    var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.78;
  letter-spacing:.01em;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-weight:600;line-height:1.25;letter-spacing:.02em}
p{max-width:var(--measure)}
strong{color:var(--paper);font-weight:600}
small{font-size:14px;line-height:1.7}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--coral);
  outline-offset:2px;
  border-radius:2px;
}

::selection{background:var(--amber);color:var(--ink)}

/* ---------- 4. 字体角色 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:.07em;
  line-height:.95;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.lede{
  font-size:18px;
  line-height:1.78;
  color:var(--mist);
  max-width:60ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
  line-height:1.4;
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--cyan);
  flex:none;
}
.index-label{
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
  line-height:1.4;
}

/* ---------- 5. 布局容器 ---------- */
.container{
  width:100%;
  max-width:1360px;
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}

.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

@media (min-width:900px){
  .container{
    padding-left:calc(var(--rail-w) + clamp(28px,6vw,148px));
    padding-right:clamp(24px,4vw,64px);
  }
}
@media (max-width:899px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

/* ---------- 6. 章节头 ---------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px 20px;
  align-items:start;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--cyan);
  padding-top:.55em;
}
.section-head__title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(26px,3.2vw,44px);
  letter-spacing:.06em;
  line-height:.98;
  color:var(--paper);
}

/* ---------- 7. 画板 / 面板 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,30px);
}
.stack-panel{
  position:relative;
  isolation:isolate;
  background:var(--panel);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,30px);
}
.stack-panel::after{
  content:"";
  position:absolute;
  inset:0;
  transform:translate(8px,8px);
  border:1px solid rgba(79,227,224,.26);
  border-radius:var(--radius);
  z-index:-1;
  pointer-events:none;
}

.rule{
  height:1px;
  border:0;
  margin-block:clamp(20px,3vw,32px);
  background:linear-gradient(90deg,rgba(42,127,134,.95),rgba(42,127,134,0));
}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--font-body);
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.1em;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--amber);color:var(--ink);border-color:var(--amber)}
.btn--primary:hover{background:var(--coral);border-color:var(--coral);color:var(--ink)}
.btn--ghost{background:transparent;color:var(--paper);border-color:rgba(79,227,224,.45)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--quiet{
  background:transparent;
  color:var(--cyan);
  border:0;
  border-bottom:1px solid var(--teal);
  border-radius:0;
  padding:6px 0;
}
.btn--quiet:hover{color:var(--coral);border-bottom-color:var(--coral)}

/* ---------- 9. 标签 / 面包屑 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  background:var(--paper);
  color:var(--ink);
  font-size:11px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  border-radius:1px;
  line-height:1.6;
}
.tag--outline{
  background:transparent;
  color:var(--cyan);
  border:1px solid var(--teal);
  font-weight:500;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
  padding-top:18px;
}
.breadcrumb__link{
  color:var(--mist);
  border-bottom:1px solid rgba(42,127,134,.6);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.breadcrumb__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb__sep{color:var(--teal)}
.breadcrumb__current{color:var(--paper)}

/* ---------- 10. 费用数字锚点 ---------- */
.num-anchor{
  display:inline-flex;
  align-items:flex-start;
  gap:8px;
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  font-size:clamp(72px,11vw,128px);
  line-height:.82;
  letter-spacing:-.03em;
  color:var(--amber);
}
.num-anchor__unit{
  font-size:.22em;
  line-height:1.2;
  letter-spacing:.12em;
  color:var(--mist);
  padding-top:.6em;
  font-weight:500;
}

/* ---------- 11. 图片容器基础 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--edge);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(79,227,224,.16), transparent 58%),
    linear-gradient(155deg, var(--haze), var(--ink) 68%);
}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(242,233,218,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242,233,218,.05) 1px, transparent 1px);
  background-size:100% 34px, 34px 100%;
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x5{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}
.media-frame__caption{
  position:absolute;
  left:0;
  bottom:0;
  margin:0;
  max-width:none;
  padding:8px 12px;
  background:rgba(10,18,32,.84);
  border-top:1px solid var(--edge);
  border-right:1px solid var(--edge);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
}

/* ---------- 12. 分段控件 ---------- */
.segmented{
  display:inline-flex;
  flex-wrap:wrap;
  gap:4px;
  padding:4px;
  background:var(--panel);
  border:1px solid var(--edge);
  border-radius:var(--radius);
}
.segmented__tab{
  position:relative;
  padding:9px 16px;
  border-bottom:2px solid transparent;
  border-radius:2px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--mist);
  cursor:pointer;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.segmented__tab:hover{color:var(--paper)}
.segmented__tab[aria-selected="true"]{
  color:var(--paper);
  background:rgba(79,227,224,.1);
  border-bottom-color:var(--coral);
}
.tabpanel{padding-top:22px}
.tabpanel[hidden]{display:none}

/* ---------- 13. 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal].is-in{
  opacity:1;
  transform:none;
  will-change:auto;
}

/* =========================================================
   14. HEADER
   ========================================================= */
.site-header{position:relative;z-index:60}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:220;
  padding:11px 18px;
  background:var(--amber);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* --- 移动顶栏 --- */
.topbar{
  position:fixed;
  inset:0 0 auto 0;
  z-index:70;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:62px;
  padding:10px 16px;
  background:linear-gradient(180deg, rgba(16,27,46,.98), rgba(10,18,32,.92));
  border-bottom:1px solid var(--edge);
  backdrop-filter:blur(10px);
}
.topbar__brand{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.topbar__mark{
  flex:none;
  width:32px;
  height:32px;
  display:grid;
  place-items:center;
  background:var(--amber);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:17px;
  font-weight:700;
  border-radius:2px;
}
.topbar__text{display:flex;flex-direction:column;min-width:0;line-height:1.2}
.topbar__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--paper);
}
.topbar__tagline{
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--teal);
  border-radius:2px;
  color:var(--paper);
  font-size:12px;
  letter-spacing:.18em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  width:16px;
  height:11px;
}
.nav-toggle__bars span{
  display:block;
  height:1px;
  background:var(--cyan);
  transition:transform .2s 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__text{line-height:1}

/* --- 遮罩 --- */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:75;
  background:rgba(5,9,16,.74);
  backdrop-filter:blur(3px);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s var(--ease);
}
.nav-scrim[data-visible]{opacity:1;pointer-events:auto}

/* --- 侧边轨道 --- */
.rail{
  position:fixed;
  top:0;
  bottom:0;
  left:0;
  z-index:80;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  align-items:stretch;
  padding:20px 0 16px;
  background:linear-gradient(180deg, #101B2E 0%, #0B1524 55%, var(--ink) 100%);
  border-right:1px solid var(--edge);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:thin;
  scrollbar-color:var(--teal) transparent;
}
.rail::-webkit-scrollbar{width:4px}
.rail::-webkit-scrollbar-thumb{background:var(--teal);border-radius:2px}

.rail__progress{
  position:absolute;
  top:0;
  right:-1px;
  width:2px;
  height:100%;
  background:rgba(42,127,134,.24);
  pointer-events:none;
}
.rail__progress-bar{
  display:block;
  width:100%;
  height:0;
  background:linear-gradient(180deg,var(--cyan),var(--amber));
  transition:height .1s linear;
}

.rail__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding:0 8px;
}
.rail__mark{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  background:var(--amber);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  border-radius:2px;
  box-shadow:0 0 0 1px rgba(255,180,92,.35), 0 8px 22px rgba(255,180,92,.14);
}
.rail__name{
  writing-mode:vertical-rl;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.34em;
  color:var(--paper);
}
.rail__tagline{display:none}

.rail__nav{
  width:100%;
  margin-block:auto;
  padding-block:18px;
}
.rail__list{display:flex;flex-direction:column;gap:2px;width:100%}
.rail__item{width:100%}

.rail__link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:3px;
  width:100%;
  padding:9px 4px;
  color:var(--mist);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.rail__link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:2px;
  height:0;
  transform:translateY(-50%);
  background:var(--cyan);
  transition:height .2s var(--ease);
}
.rail__link:hover{
  color:var(--paper);
  background:rgba(79,227,224,.07);
}
.rail__link:hover::before{height:14px;background:var(--coral)}
.rail__link[aria-current="page"]{color:var(--paper)}
.rail__link[aria-current="page"]::before{height:26px;background:var(--cyan)}
.rail__index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--teal);
  line-height:1;
}
.rail__link[aria-current="page"] .rail__index{color:var(--cyan)}
.rail__label{
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.5;
  white-space:nowrap;
}
.rail__path{
  position:absolute;
  left:calc(100% + 10px);
  top:50%;
  transform:translate(-6px,-50%);
  padding:3px 8px;
  background:var(--panel);
  border:1px solid var(--teal);
  border-radius:2px;
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  transition:opacity .16s var(--ease),transform .16s var(--ease);
  z-index:5;
}
.rail__link:hover .rail__path,
.rail__link:focus-visible .rail__path{
  opacity:1;
  transform:translate(0,-50%);
}

.rail__foot{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  padding:0 10px;
}
.rail__cta{
  display:block;
  width:100%;
  padding:9px 4px;
  text-align:center;
  border:1px solid rgba(255,180,92,.55);
  border-radius:2px;
  color:var(--amber);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.5;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.rail__cta:hover{background:var(--amber);color:var(--ink);border-color:var(--amber)}
.rail__note{
  max-width:none;
  font-size:10px;
  line-height:1.6;
  letter-spacing:.08em;
  color:var(--teal);
  text-align:center;
}
.rail__quick{display:none}

/* =========================================================
   15. FOOTER
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:linear-gradient(180deg,var(--ink) 0%, #0C1727 38%, var(--panel) 100%);
  border-top:1px solid var(--edge);
}
.footer__stripe{
  height:5px;
  background:linear-gradient(90deg,var(--amber) 0%, var(--cyan) 46%, rgba(79,227,224,0) 100%);
  opacity:.9;
}
.footer__inner{
  max-width:1320px;
  margin-inline:auto;
  padding:clamp(34px,6vw,72px) clamp(18px,4vw,48px) clamp(18px,3vw,28px);
}

.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(28px,4vw,56px);
}

.footer__wordmark{
  max-width:none;
  font-family:var(--font-display);
  font-size:clamp(30px,4.4vw,46px);
  font-weight:600;
  letter-spacing:.14em;
  line-height:1;
  color:var(--paper);
}
.footer__intro{
  margin-top:14px;
  max-width:34ch;
  font-size:14px;
  line-height:1.78;
  color:var(--mist);
}
.footer__badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:18px;
  padding:6px 11px;
  border:1px solid rgba(79,227,224,.3);
  border-radius:2px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan);
  line-height:1.6;
}
.footer__badge-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--coral);
  box-shadow:0 0 0 3px rgba(255,122,138,.18);
  flex:none;
}

.footer__cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(126px,1fr));
  gap:clamp(20px,3vw,32px);
  align-content:start;
}
.footer__col-title{
  margin-bottom:14px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
  line-height:1.5;
}
.footer__links{display:flex;flex-direction:column;gap:2px}
.footer__link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer__link:hover{color:var(--paper);border-bottom-color:var(--coral)}

.footer__contact-list{display:flex;flex-direction:column;gap:14px}
.footer__contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 10px;
  font-size:14px;
  line-height:1.7;
  color:var(--paper);
}
.footer__contact-label{
  flex:none;
  min-width:34px;
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer__contact-value{font-size:13.5px;line-height:1.7}
.footer__contact-line .footer__contact-value:not(.mono){font-family:var(--font-body);letter-spacing:.01em;max-width:30ch}

.footer__copy{
  display:inline-flex;
  align-items:center;
  padding:3px 9px;
  border:1px solid var(--teal);
  border-radius:2px;
  color:var(--mist);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease),background .16s var(--ease);
}
.footer__copy:hover{border-color:var(--coral);color:var(--paper)}
.footer__copy[data-copied]{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(79,227,224,.08);
}

.footer__note{
  margin-top:16px;
  max-width:42ch;
  padding-left:12px;
  border-left:2px solid var(--teal);
  font-size:12.5px;
  line-height:1.75;
  color:var(--mist);
}

.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:clamp(28px,4vw,48px);
  padding-top:18px;
  border-top:1px dashed rgba(42,127,134,.45);
  font-size:12px;
  color:var(--mist);
}
.footer__copyright{max-width:none;letter-spacing:.04em}
.footer__legal{display:flex;flex-wrap:wrap;gap:16px}
.footer__legal-link{
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer__legal-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer__icp{
  max-width:none;
  font-family:var(--font-mono);
  letter-spacing:.06em;
  color:var(--mist);
}

/* =========================================================
   16. 响应式
   ========================================================= */

/* 移动 / 平板：顶栏 + 抽屉 */
@media (max-width:899px){
  body{padding-top:62px}

  .rail{
    top:0;
    right:0;
    left:auto;
    bottom:0;
    width:min(330px,88vw);
    padding:18px 16px calc(18px + env(safe-area-inset-bottom));
    border-right:0;
    border-left:1px solid var(--edge);
    box-shadow:-28px 0 64px rgba(0,0,0,.6);
    transform:translateX(102%);
    visibility:hidden;
    transition:transform .3s var(--ease),visibility .3s var(--ease);
    overflow-y:auto;
  }
  .rail[data-open]{
    transform:translateX(0);
    visibility:visible;
  }
  .rail__progress{display:none}

  .rail__brand{
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:4px 4px 18px;
    border-bottom:1px solid var(--edge);
  }
  .rail__mark{width:36px;height:36px;font-size:18px}
  .rail__name{
    writing-mode:horizontal-tb;
    font-size:17px;
    letter-spacing:.18em;
  }
  .rail__tagline{
    display:block;
    margin-left:auto;
    font-size:10px;
    letter-spacing:.14em;
    color:var(--teal);
    text-align:right;
    max-width:9em;
    line-height:1.5;
  }

  .rail__nav{padding-block:10px}
  .rail__list{gap:0}
  .rail__link{
    flex-direction:row;
    align-items:baseline;
    justify-content:flex-start;
    gap:12px;
    padding:13px 12px;
    border-bottom:1px dashed rgba(42,127,134,.32);
  }
  .rail__link::before{
    top:0;
    bottom:0;
    height:auto;
    width:2px;
    transform:none;
    opacity:0;
    background:var(--cyan);
    transition:opacity .16s var(--ease);
  }
  .rail__link:hover::before{height:auto;opacity:.5}
  .rail__link[aria-current="page"]::before{height:auto;opacity:1}
  .rail__index{font-size:11px}
  .rail__label{font-size:15px;letter-spacing:.06em}
  .rail__path{display:none}

  .rail__foot{
    margin-top:auto;
    align-items:stretch;
    padding:16px 4px 0;
    gap:12px;
  }
  .rail__cta{padding:12px 10px;font-size:13px}
  .rail__note{text-align:left;font-size:11px}
  .rail__quick{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:8px;
  }
  .rail__quick-btn{
    display:flex;
    align-items:center;
    justify-content:center;
    padding:11px 6px;
    border:1px solid var(--teal);
    border-radius:2px;
    color:var(--cyan);
    font-size:12px;
    letter-spacing:.08em;
    text-align:center;
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .rail__quick-btn:hover{
    background:rgba(79,227,224,.1);
    border-color:var(--cyan);
  }

  html.nav-open{overflow:hidden}
}

/* 桌面：轨道常驻，顶栏与遮罩退场 */
@media (min-width:900px){
  .topbar,
  .nav-toggle,
  .nav-scrim{display:none}
}

@media (min-width:720px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
}
@media (min-width:1000px){
  .footer__grid{grid-template-columns:1.15fr 1.7fr 1.15fr;align-items:start}
  .footer__brand{grid-column:auto}
  .footer__inner{padding-left:calc(var(--rail-w) + clamp(20px,4vw,48px))}
}
@media (min-width:1000px){
  .footer__contact{padding-left:clamp(0px,1.6vw,24px);border-left:1px dashed rgba(42,127,134,.35)}
}

@media (min-width:620px){
  .footer__base{gap:16px 28px}
}

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .rail{transition:none}
  .rail__progress-bar{transition:none}
}