/* =========================================================
   626在线登录口 /assets/site.css
   轨道 · 站台：侧边轨道导航 + 顶部状态条 + 深墨蓝页脚
   ========================================================= */

/* ---------- 变量 ---------- */
:root{
  --ink-900:#0E1B2A;
  --ink-800:#14263A;
  --ink-700:#1D3550;
  --amber-500:#F59A1B;
  --amber-300:#FFC061;
  --celadon-500:#4FBFA0;
  --celadon-700:#2E8E77;
  --clay-500:#C8704A;
  --stone-400:#8A97A6;
  --stone-200:#C9D2DC;
  --paper:#F6F3EC;
  --white:#FFFFFF;

  --line:rgba(20,38,58,.14);
  --line-dark:rgba(201,210,220,.16);

  --rail-w:88px;
  --topbar-h:68px;
  --maxw:1240px;
  --radius:18px;
  --radius-sm:10px;

  --font-sans:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,"Cascadia Mono",Menlo,Consolas,"Noto Sans Mono",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:160ms;
  --t-enter:320ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--topbar-h) + 18px)}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-800);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,ul,ol,dl,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{line-height:1.16;letter-spacing:-.02em;font-weight:800;color:var(--ink-900)}
h1{font-size:clamp(34px,5vw,64px)}
h2{font-size:clamp(24px,3vw,30px)}
h3{font-size:22px}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
img,svg,video{display:block;max-width:100%}
::selection{background:var(--amber-300);color:var(--ink-900)}

/* ---------- 焦点 ---------- */
:focus-visible{outline:2px solid var(--amber-500);outline-offset:3px;border-radius:4px}
.rail :focus-visible,
.drawer :focus-visible,
.site-foot :focus-visible,
.topbar :focus-visible{outline-color:var(--amber-300)}

/* ---------- 跳转链接 ---------- */
.skip{
  position:fixed;top:10px;left:10px;z-index:200;
  display:inline-block;padding:10px 16px;border-radius:var(--radius-sm);
  background:var(--amber-500);color:#1A1206;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  transform:translateY(-220%);
  transition:transform var(--t-fast) var(--ease);
}
.skip:focus,.skip:focus-visible{transform:none}

/* =========================================================
   头部：轨道 + 状态条 + 抽屉
   ========================================================= */
.site-head{position:relative;z-index:60}

/* ---------- 轨道 ---------- */
.rail{
  position:fixed;inset:0 auto 0 0;width:var(--rail-w);z-index:80;
  display:none;flex-direction:column;
  color:var(--paper);
  border-right:1px solid var(--line-dark);
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg,rgba(201,210,220,.045) 0 1px,transparent 1px 9px),
    linear-gradient(180deg,var(--ink-900),var(--ink-800) 58%,#0B1521);
}
.rail__mark{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  height:var(--topbar-h);flex:0 0 auto;
  border-bottom:1px solid var(--line-dark);
  transition:background var(--t-fast) var(--ease);
}
.rail__mark:hover{background:var(--ink-700)}
.rail__mark-num{font-family:var(--font-mono);font-size:14px;font-weight:500;letter-spacing:.14em;color:var(--amber-500)}
.rail__mark-dot{width:5px;height:5px;border-radius:50%;background:var(--celadon-500);box-shadow:0 0 0 3px rgba(79,191,160,.18)}

.rail__nav{flex:1 1 auto;min-height:0;overflow-y:auto;padding:14px 0;scrollbar-width:thin}
.rail__list{display:flex;flex-direction:column;gap:4px}
.rail__item{padding:0 10px}
.rail__link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:12px 4px;border-radius:var(--radius-sm);
  color:var(--stone-400);
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.rail__link::before{
  content:"";position:absolute;left:-10px;top:50%;width:2px;height:0;
  background:var(--amber-500);transform:translateY(-50%);
  transition:height var(--t-fast) var(--ease);
}
.rail__link:hover{color:var(--paper);background:var(--ink-700)}
.rail__link[aria-current="page"]{color:var(--paper);background:var(--ink-700)}
.rail__link[aria-current="page"]::before{height:22px}
.rail__num{font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.08em;opacity:.75;line-height:1}
.rail__link[aria-current="page"] .rail__num{color:var(--amber-500);opacity:1}
.rail__label{font-size:12px;font-weight:600;letter-spacing:.06em;line-height:1.2;text-align:center}

.rail__foot{
  flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:14px 6px;border-top:1px solid var(--line-dark);
}
.rail__pulse{
  width:7px;height:7px;border-radius:50%;background:var(--celadon-500);
  box-shadow:0 0 0 0 rgba(79,191,160,.5);
  animation:pulse 2.6s var(--ease) infinite;
}
.rail__foot-text{font-size:10px;letter-spacing:.16em;color:var(--stone-400);line-height:1}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(79,191,160,.45)}
  70%{box-shadow:0 0 0 8px rgba(79,191,160,0)}
  100%{box-shadow:0 0 0 0 rgba(79,191,160,0)}
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .rail{display:flex}
}
@media (min-width:1024px) and (min-height:720px){
  .rail__label{writing-mode:vertical-rl;letter-spacing:.24em}
  .rail__link{padding:15px 4px}
}

/* ---------- 顶部状态条 ---------- */
.topbar{
  position:sticky;top:0;z-index:70;
  color:var(--paper);
  background:rgba(14,27,42,.94);
  border-bottom:1px solid var(--line-dark);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.topbar__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  min-height:var(--topbar-h);padding:10px clamp(16px,3vw,28px);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0;color:var(--paper)}
.brand__glyph{
  width:32px;height:32px;flex:0 0 32px;
  display:flex;flex-direction:column;justify-content:center;gap:3px;padding:0 8px;
  border:1px solid var(--line-dark);border-radius:9px;
  background:linear-gradient(155deg,rgba(245,154,27,.22),rgba(245,154,27,0) 72%);
}
.brand__glyph span{display:block;height:2px;border-radius:2px;background:var(--amber-500)}
.brand__glyph span:nth-child(2){width:72%;background:var(--celadon-500)}
.brand__glyph span:nth-child(3){width:44%;background:var(--stone-400)}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__line{font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.3;white-space:nowrap}
.brand__tag{font-size:11px;letter-spacing:.06em;line-height:1.45;color:var(--stone-400);white-space:nowrap}

.topbar__tools{display:flex;align-items:center;gap:12px}
.status{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--stone-200);white-space:nowrap;
}
.status__dot{width:7px;height:7px;border-radius:50%;background:var(--celadon-500);box-shadow:0 0 10px rgba(79,191,160,.9)}
.status__text{line-height:1}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45em;
  padding:.7em 1.2em;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.02em;line-height:1.2;text-align:center;
  cursor:pointer;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.btn--amber{background:var(--amber-500);color:#1A1206;box-shadow:0 10px 22px -14px rgba(245,154,27,.95)}
.btn--amber:hover{background:var(--amber-300);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line-dark)}
.btn--ghost:hover{border-color:var(--amber-500);color:var(--amber-300)}
.btn--ink{background:var(--ink-900);color:var(--paper)}
.btn--ink:hover{background:var(--ink-700)}
.btn--line{background:transparent;color:var(--ink-900);border-color:var(--stone-200)}
.btn--line:hover{border-color:var(--amber-500);color:var(--amber-500)}
.topbar__cta{white-space:nowrap}

/* ---------- 移动菜单按钮 ---------- */
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 10px;border:1px solid var(--line-dark);border-radius:10px;
  background:transparent;color:var(--paper);cursor:pointer;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.nav-toggle:hover{border-color:var(--amber-500);color:var(--amber-300)}
.nav-toggle__bars{display:flex;flex-direction:column;justify-content:center;gap:4px;width:16px;height:16px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease)}
.nav-toggle__text{font-size:12px;letter-spacing:.1em;line-height:1}
.nav-toggle[aria-expanded="true"]{border-color:var(--amber-500);color:var(--amber-300)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg)}
@media (min-width:1024px){.nav-toggle{display:none}}

/* ---------- 滚动进度 ---------- */
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(201,210,220,.12);overflow:hidden}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--amber-500),var(--amber-300) 55%,var(--celadon-500));
  transition:width 120ms linear;
}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:120;display:flex;
  background:rgba(8,16,25,.62);
  -webkit-backdrop-filter:blur(4px);
  backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity var(--t-fast) var(--ease),visibility 0s linear var(--t-fast);
}
.drawer[data-open]{
  opacity:1;visibility:visible;pointer-events:auto;
  transition:opacity var(--t-fast) var(--ease),visibility 0s linear 0s;
}
.drawer__panel{
  width:min(360px,88vw);height:100%;
  display:flex;flex-direction:column;gap:18px;
  padding:20px 20px 28px;
  overflow-y:auto;
  color:var(--paper);
  border-right:1px solid var(--line-dark);
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg,rgba(201,210,220,.045) 0 1px,transparent 1px 9px),
    linear-gradient(180deg,var(--ink-900),#0B1521);
  transform:translateX(-14px);
  transition:transform var(--t-enter) var(--ease);
}
.drawer[data-open] .drawer__panel{transform:none}
.drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line-dark)}
.drawer__kicker{font-size:11px;font-weight:600;letter-spacing:.16em;color:var(--celadon-500)}
.drawer__close{
  padding:6px 11px;border:1px solid var(--line-dark);border-radius:8px;
  background:transparent;color:var(--paper);font-size:12px;letter-spacing:.08em;cursor:pointer;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.drawer__close:hover{border-color:var(--amber-500);color:var(--amber-300)}
.drawer__nav{flex:1 1 auto}
.drawer__list{display:flex;flex-direction:column}
.drawer__link{
  display:flex;align-items:baseline;gap:14px;
  padding:15px 4px;border-bottom:1px solid rgba(201,210,220,.1);
  font-size:20px;font-weight:700;letter-spacing:-.01em;color:var(--paper);
  transition:color var(--t-fast) var(--ease),padding-left var(--t-fast) var(--ease);
}
.drawer__link:hover{color:var(--amber-300);padding-left:10px}
.drawer__link[aria-current="page"]{color:var(--amber-500)}
.drawer__num{font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--stone-400)}
.drawer__link[aria-current="page"] .drawer__num{color:var(--celadon-500)}
.drawer__foot{display:flex;flex-direction:column;gap:12px;padding-top:16px;border-top:1px solid var(--line-dark)}
.drawer__cta{width:100%}
.drawer__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--stone-400)}
@media (min-width:1024px){.drawer{display:none}}
@media (max-width:719px){.brand__tag{display:none}}
@media (max-width:899px){.status{display:none}}
@media (max-width:479px){
  .topbar__cta{padding:.6em .9em;font-size:13px}
  .topbar__tools{gap:8px}
}
@media (max-width:419px){.nav-toggle__text{display:none}}

/* =========================================================
   页脚
   ========================================================= */
.site-foot{
  position:relative;overflow:hidden;
  margin-top:clamp(40px,6vw,88px);
  color:var(--stone-200);
  background-color:var(--ink-900);
  background-image:linear-gradient(180deg,#0B1521,var(--ink-900) 40%,#0A121D);
}
.site-foot::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(201,210,220,.05) 0 1px,transparent 1px 56px),
    repeating-linear-gradient(0deg,rgba(201,210,220,.04) 0 1px,transparent 1px 56px);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 72%);
  mask-image:linear-gradient(180deg,#000,transparent 72%);
}
.foot__seam{height:3px;background:linear-gradient(90deg,var(--amber-500),var(--celadon-500) 46%,rgba(201,210,220,.18) 78%,rgba(201,210,220,0))}
.foot__inner{
  position:relative;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:clamp(36px,5vw,64px) clamp(18px,4vw,40px) clamp(22px,3vw,34px);
  display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,48px);
}
.foot__brand{min-width:0}
.foot__mark{
  display:inline-flex;align-items:baseline;gap:9px;
  font-size:26px;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--white);
  transition:color var(--t-fast) var(--ease);
}
.foot__mark:hover{color:var(--amber-300)}
.foot__mark span{font-size:11px;font-weight:600;letter-spacing:.16em;color:var(--celadon-500)}
.foot__mono{margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--stone-400)}
.foot__blurb{margin-top:14px;max-width:28ch;font-size:14px;line-height:1.9;color:var(--stone-200)}
.foot__status{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--celadon-500);
}
.foot__dot{width:6px;height:6px;border-radius:50%;background:var(--celadon-500);animation:pulse 2.6s var(--ease) infinite}

.foot__cols{display:grid;grid-template-columns:1fr;gap:24px}
.foot__col{min-width:0}
.foot__col-title{
  position:relative;margin:0 0 12px;padding-top:10px;
  font-size:12px;font-weight:600;letter-spacing:.16em;line-height:1.5;
  color:var(--stone-400);border-top:1px solid var(--line-dark);
}
.foot__col-title::after{content:"";position:absolute;left:0;top:-1px;width:22px;height:1px;background:var(--amber-500)}
.foot__links{display:flex;flex-direction:column;gap:2px}
.foot__link{
  display:inline-block;padding:4px 0;font-size:14px;color:var(--stone-200);
  transition:color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.foot__link:hover{color:var(--amber-300);transform:translateX(3px)}
.foot__link[aria-current="page"]{color:var(--amber-500)}

.foot__contact{min-width:0}
.foot__contact-list{display:flex;flex-direction:column;gap:0}
.foot__contact-item{
  display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 10px;
  padding:12px 0;border-bottom:1px solid rgba(201,210,220,.1);
}
.foot__contact-item:first-child{padding-top:0}
.foot__contact-key{grid-column:1/-1;font-size:11px;font-weight:600;letter-spacing:.14em;line-height:1.4;color:var(--stone-400)}
.foot__contact-val{
  min-width:0;font-family:var(--font-mono);font-size:12px;line-height:1.7;letter-spacing:.02em;
  color:var(--stone-200);word-break:break-word;
}
.copy{
  flex:0 0 auto;padding:3px 9px;border:1px solid var(--line-dark);border-radius:999px;
  background:transparent;font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
  color:var(--stone-400);cursor:pointer;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.copy:hover{color:var(--amber-300);border-color:var(--amber-500)}
.copy[data-copied="true"]{color:var(--celadon-500);border-color:var(--celadon-700)}

.foot__base{
  position:relative;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:18px clamp(18px,4vw,40px) 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  border-top:1px solid var(--line-dark);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--stone-400);
}
.foot__legal{color:var(--stone-400)}
.foot__legal-note{color:var(--stone-400)}

/* ---------- 固定双按钮 ---------- */
.dock{position:fixed;right:16px;bottom:16px;z-index:100;display:flex;flex-direction:column;gap:8px}
.dock__btn{
  width:46px;height:46px;display:grid;place-items:center;
  border-radius:12px;border:1px solid rgba(201,210,220,.28);
  background:rgba(20,38,58,.92);color:var(--paper);
  font-family:var(--font-mono);font-size:14px;line-height:1;cursor:pointer;
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
  transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.dock__btn:hover{transform:translateY(-2px);border-color:var(--amber-500);color:var(--amber-300)}
.dock__btn--home{color:var(--celadon-500)}
.dock__btn--top{background:var(--amber-500);color:#1A1206;border-color:transparent}
.dock__btn--top:hover{background:var(--amber-300);color:#1A1206;border-color:transparent}

@media (min-width:480px){.foot__cols{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:760px){.foot__inner{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1100px){.foot__inner{grid-template-columns:1.05fr 1.75fr .95fr}}
@media (max-width:559px){
  .dock{right:12px;bottom:12px}
  .dock__btn{width:42px;height:42px;font-size:13px}
}

/* =========================================================
   通用内容组件
   ========================================================= */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,4vw,40px)}
.wrap--narrow{max-width:860px}

.section{padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(26px,4vw,48px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 18px;
  padding-top:16px;border-top:1px solid var(--stone-200);
  margin-bottom:clamp(20px,3.4vw,38px);
}
.section__head h2{flex:1 1 auto;min-width:0}
.section--dark{background:var(--ink-900);color:var(--stone-200)}
.section--dark h1,.section--dark h2,.section--dark h3{color:var(--white)}
.section--dark .section__head{border-top-color:var(--line-dark)}
.section--dark .lede{color:var(--stone-200)}

.idx{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.16em;line-height:1.4;color:var(--celadon-700)}
.idx--amber{color:#9A5B05}
.idx--clay{color:var(--clay-500)}
.idx--stone{color:var(--stone-400)}

.mono{font-family:var(--font-mono);font-size:.9em;font-weight:500;letter-spacing:.04em}

.lede{font-size:clamp(17px,1.6vw,19px);line-height:1.85;color:var(--ink-700);max-width:46ch}

.divider{height:1px;border:0;background:var(--stone-200);margin-block:clamp(20px,3vw,32px)}
.divider--dark{background:var(--line-dark)}

.card{
  background:var(--white);border:1px solid var(--stone-200);border-radius:var(--radius);
  padding:clamp(18px,3vw,30px);
  box-shadow:0 20px 40px -36px rgba(14,27,42,.5);
  transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.card--dark{background:var(--ink-800);border-color:var(--line-dark);color:var(--stone-200);box-shadow:none}
.card--dark h3,.card--dark h2{color:var(--white)}
.card--lift:hover{transform:translateY(-2px);border-color:var(--amber-500)}

.tag{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 9px;border-radius:6px;
  font-size:11px;font-weight:600;letter-spacing:.1em;line-height:1.6;
  background:rgba(201,210,220,.28);color:var(--ink-700);
}
.tag--celadon{background:rgba(79,191,160,.18);color:var(--celadon-700)}
.tag--amber{background:rgba(245,154,27,.18);color:#9A5B05}
.tag--clay{background:rgba(200,112,74,.16);color:var(--clay-500)}
.tag--dark{background:var(--ink-700);color:var(--stone-200)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,26px)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}
@media (max-width:899px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-3,.span-4{grid-column:span 3}
  .span-5,.span-6,.span-7{grid-column:span 6}
  .span-8,.span-9,.span-12{grid-column:span 6}
}
@media (max-width:559px){
  .grid{gap:14px}
  .span-3,.span-4{grid-column:span 6}
}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:14px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--stone-400);
}
.crumbs__link{color:var(--stone-400);transition:color var(--t-fast) var(--ease)}
.crumbs__link:hover{color:var(--amber-500)}
.crumbs__sep{color:var(--stone-200)}
.crumbs__current{color:var(--ink-800)}
.crumbs [aria-current="page"]{color:var(--ink-800)}
.section--dark .crumbs__current,
.section--dark .crumbs [aria-current="page"]{color:var(--paper)}
.section--dark .crumbs__sep{color:var(--line-dark)}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius);aspect-ratio:16/9;
  background-color:var(--ink-800);
  background-image:
    radial-gradient(120% 90% at 18% 0%,rgba(245,154,27,.22),rgba(245,154,27,0) 60%),
    radial-gradient(100% 80% at 92% 100%,rgba(79,191,160,.18),rgba(79,191,160,0) 62%),
    repeating-linear-gradient(0deg,rgba(201,210,220,.07) 0 1px,transparent 1px 14px),
    linear-gradient(160deg,var(--ink-800),var(--ink-900));
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  border:1px solid var(--line-dark);border-radius:inherit;
}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media--paper{
  background-color:#EDE8DE;
  background-image:
    radial-gradient(120% 90% at 20% 0%,rgba(200,112,74,.16),rgba(200,112,74,0) 60%),
    repeating-linear-gradient(0deg,rgba(20,38,58,.06) 0 1px,transparent 1px 14px),
    linear-gradient(160deg,#EFEAE0,var(--paper));
}
.media--paper::after{border-color:rgba(20,38,58,.1)}
.media img,.media__img{width:100%;height:100%;object-fit:cover}
.media__caption{margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--stone-400)}

/* ---------- 滚动显现 ---------- */
[data-reveal]{transition:opacity var(--t-enter) var(--ease),transform var(--t-enter) var(--ease)}
[data-reveal].is-armed{opacity:0;transform:translateY(12px)}
[data-reveal].is-armed.is-in{opacity:1;transform:none}

[data-reveal-group] > *{transition:opacity var(--t-enter) var(--ease),transform var(--t-enter) var(--ease)}
[data-reveal-group].is-armed > *{opacity:0;transform:translateY(12px)}
[data-reveal-group].is-armed.is-in > *{opacity:1;transform:none}
[data-reveal-group].is-armed > *:nth-child(2){transition-delay:60ms}
[data-reveal-group].is-armed > *:nth-child(3){transition-delay:120ms}
[data-reveal-group].is-armed > *:nth-child(4){transition-delay:180ms}
[data-reveal-group].is-armed > *:nth-child(5){transition-delay:240ms}
[data-reveal-group].is-armed > *:nth-child(6){transition-delay:300ms}

/* ---------- 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:120ms !important;
    transition-delay:0ms !important;
  }
  [data-reveal].is-armed,
  [data-reveal-group].is-armed > *{transform:none !important}
  .rail__pulse,.foot__dot{animation:none !important;box-shadow:0 0 0 3px rgba(79,191,160,.18)}
  .dock__btn:hover,.foot__link:hover,.btn--amber:hover,.card--lift:hover{transform:none !important}
}