/* ================= 00 设计变量 ================= */
:root{
  --ink-900:#0B1030;
  --ink-800:#141A45;
  --line:#253073;
  --line-soft:rgba(37,48,115,.55);
  --gold:#F2C46B;
  --gold-hi:#FFD89B;
  --gold-wash:rgba(242,196,107,.10);
  --cyan:#4FE3D0;
  --cyan-wash:rgba(79,227,208,.10);
  --magenta:#FF4FA3;
  --text:#E9ECFF;
  --muted:#9AA3D6;
  --green:#2AE38B;
  --rail-w:104px;
  --wrap:1240px;
  --gutter:clamp(18px,4.2vw,56px);
  --cut:18px;
  --f-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --t-fast:150ms;
  --t-mid:280ms;
  --ease:cubic-bezier(.22,.68,.24,1);
  --shadow:0 18px 42px -24px rgba(4,7,26,.92);
}
html[data-theme="day"]{
  --ink-900:#EEF1FF;
  --ink-800:#FFFFFF;
  --line:#C6CFF0;
  --line-soft:rgba(198,207,240,.7);
  --gold:#A9741A;
  --gold-hi:#7E5406;
  --gold-wash:rgba(169,116,26,.12);
  --cyan:#0E8E82;
  --cyan-wash:rgba(14,142,130,.12);
  --magenta:#C4237A;
  --text:#131A3D;
  --muted:#5B659B;
  --green:#0E8A55;
  --shadow:0 18px 42px -26px rgba(35,45,95,.35);
}

/* ================= 01 基础重置 ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100%;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 78% -8%, rgba(79,227,208,.14), transparent 62%),
    radial-gradient(900px 560px at 6% 10%, rgba(242,196,107,.12), transparent 60%),
    radial-gradient(760px 520px at 94% 88%, rgba(255,79,163,.10), transparent 66%),
    linear-gradient(118deg, transparent 44%, rgba(242,196,107,.07) 50%, transparent 56%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  background-size:cover;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.012em;
  word-break:break-word;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
html[data-theme="day"] body{
  background-image:
    radial-gradient(1100px 620px at 78% -8%, rgba(14,142,130,.14), transparent 62%),
    radial-gradient(900px 560px at 6% 10%, rgba(169,116,26,.14), transparent 60%),
    radial-gradient(760px 520px at 94% 88%, rgba(196,35,122,.10), transparent 66%),
    linear-gradient(118deg, transparent 44%, rgba(169,116,26,.10) 50%, transparent 56%);
}
img,svg,video{max-width:100%;display:block}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:800;line-height:1.16;letter-spacing:-.012em;color:var(--text)}
p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0}
a{color:var(--cyan);text-decoration:none;transition:color var(--t-fast) var(--ease)}
a:hover{color:var(--gold-hi)}
:focus-visible{outline:2px solid var(--gold-hi);outline-offset:2px;border-radius:2px}
::selection{background:var(--gold);color:#151029}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ================= 02 头部外壳 ================= */
.site-header{position:relative;z-index:80}
.skip-link{
  position:absolute;left:14px;top:-70px;z-index:140;
  padding:10px 18px;border-radius:2px;
  background:linear-gradient(135deg,var(--gold),var(--gold-hi));
  color:#151029;font-weight:700;letter-spacing:.04em;
  transition:top var(--t-fast) var(--ease);
}
.skip-link:focus{top:14px;color:#151029}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:130;
  background:var(--line-soft);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--gold),var(--cyan));
  transition:width 100ms linear;
}

/* 顶部条（移动端） */
.topbar{
  position:sticky;top:0;z-index:70;
  display:flex;align-items:center;gap:12px;
  padding:10px var(--gutter);
  background:rgba(11,16,48,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
html[data-theme="day"] .topbar{background:rgba(255,255,255,.94)}
.topbar__brand{
  display:inline-flex;align-items:baseline;gap:6px;
  font-size:1.02rem;font-weight:800;letter-spacing:.07em;color:var(--text);
}
.topbar__brand:hover{color:var(--text)}
.topbar__brand-sub{
  font-family:var(--f-mono);font-size:.68rem;font-weight:600;
  color:var(--gold);letter-spacing:.18em;
}
.topbar__meta{
  margin-left:auto;font-family:var(--f-mono);font-size:.7rem;
  color:var(--muted);letter-spacing:.1em;white-space:nowrap;
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 13px;border-radius:2px;cursor:pointer;
  border:1px solid rgba(242,196,107,.55);
  background:var(--gold-wash);color:var(--gold);
  font-size:.82rem;font-weight:700;letter-spacing:.14em;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.nav-toggle:hover{background:rgba(242,196,107,.2);color:var(--gold-hi)}
.nav-toggle__bars{position:relative;display:inline-block;width:16px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 轨道导航 / 抽屉 */
.rail{
  position:fixed;top:0;left:0;z-index:90;
  width:min(86vw,330px);height:100dvh;
  display:flex;flex-direction:column;gap:22px;
  padding:20px 18px 26px;overflow-y:auto;
  background:linear-gradient(180deg,#0D1338,#0B1030 72%);
  border-right:1px solid var(--line);
  transform:translateX(-102%);visibility:hidden;
  transition:transform var(--t-mid) var(--ease),visibility var(--t-mid) var(--ease);
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}
.rail[data-open]{transform:none;visibility:visible}
html[data-theme="day"] .rail{background:linear-gradient(180deg,#FFFFFF,#F4F6FF 72%)}
.rail::after{
  content:"";position:absolute;top:0;right:-1px;width:1px;height:100%;
  background:linear-gradient(180deg,transparent,var(--gold),transparent);
  opacity:.55;
}
body.nav-open{overflow:hidden}

.rail__brand{display:flex;flex-direction:column;gap:8px}
.rail__mark{display:inline-flex;align-items:center;gap:8px;color:var(--text)}
.rail__mark:hover{color:var(--text)}
.rail__mark-abg{
  font-family:var(--f-mono);font-size:1.02rem;font-weight:700;
  letter-spacing:.22em;color:var(--gold);
}
.rail__mark-dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.rail__tag{font-size:.7rem;line-height:1.6;color:var(--muted);letter-spacing:.1em}

.rail__nav{display:flex;flex-direction:column;gap:4px}
.rail__link{
  display:flex;align-items:center;gap:14px;
  padding:11px 12px;border-radius:2px;
  border-left:2px solid transparent;
  color:var(--muted);font-size:.96rem;font-weight:600;letter-spacing:.05em;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.rail__link:hover{color:var(--gold-hi);background:var(--gold-wash)}
.rail__link[aria-current="page"]{
  color:var(--gold-hi);border-left-color:var(--gold);background:var(--gold-wash);
}
.rail__icon{
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;
  color:var(--cyan);min-width:20px;
}
.rail__link[aria-current="page"] .rail__icon{color:var(--gold)}
.rail__label{writing-mode:horizontal-tb}

.rail__foot{
  display:flex;flex-direction:column;gap:12px;
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
}
.status-capsule{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 11px;border-radius:999px;
  border:1px solid rgba(42,227,139,.4);background:rgba(42,227,139,.08);
  font-size:.72rem;letter-spacing:.12em;color:var(--text);
}
.status-dot{
  width:7px;height:7px;border-radius:50%;background:var(--green);
  box-shadow:0 0 0 0 rgba(42,227,139,.6);
  animation:pulse 2.6s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(42,227,139,.55)}
  70%{box-shadow:0 0 0 9px rgba(42,227,139,0)}
  100%{box-shadow:0 0 0 0 rgba(42,227,139,0)}
}
.status-capsule__text{font-family:var(--f-mono)}
.rail__cta{justify-content:center;width:100%}
.theme-toggle{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  padding:7px 12px;border-radius:2px;cursor:pointer;
  border:1px solid var(--line);background:transparent;
  color:var(--muted);font-size:.76rem;letter-spacing:.14em;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.theme-toggle:hover{color:var(--gold);border-color:var(--gold)}
.theme-toggle__icon{font-size:.9rem;line-height:1}

.rail-scrim{
  position:fixed;inset:0;z-index:88;
  background:rgba(5,8,24,.72);
  opacity:0;pointer-events:none;
  transition:opacity var(--t-mid) var(--ease);
}
.rail[data-open] ~ .rail-scrim{opacity:1;pointer-events:auto}

/* ================= 03 页脚 ================= */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,110px);
  padding:clamp(38px,5vw,70px) 0 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(20,26,69,.86),rgba(11,16,48,.98));
}
html[data-theme="day"] .site-footer{background:linear-gradient(180deg,#F6F8FF,#E6EBFF)}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;width:min(440px,62%);height:2px;
  background:linear-gradient(90deg,var(--gold),var(--cyan),transparent);
}
.site-footer::after{
  content:"";position:absolute;right:-8%;bottom:-42%;width:520px;height:320px;
  background:radial-gradient(closest-side,rgba(79,227,208,.12),transparent);
  pointer-events:none;
}
.footer__inner,.footer__bottom{position:relative;z-index:1}
.footer__inner{
  display:grid;gap:clamp(26px,3.6vw,44px);
  grid-template-columns:1fr;
}
.footer__brand{display:flex;flex-direction:column;gap:12px}
.footer__mark{
  display:inline-flex;align-items:baseline;gap:8px;
  font-size:1.14rem;font-weight:800;letter-spacing:.09em;color:var(--text);
}
.footer__mark:hover{color:var(--text)}
.footer__mark-sub{
  font-family:var(--f-mono);font-size:.72rem;font-weight:600;
  letter-spacing:.2em;color:var(--gold);
}
.footer__tagline{
  max-width:34ch;font-size:.94rem;line-height:1.8;color:var(--muted);
}
.footer__status{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.76rem;letter-spacing:.1em;color:var(--muted);
}
.footer__grid{display:grid;gap:clamp(20px,3vw,32px);grid-template-columns:1fr}
.footer__col{display:flex;flex-direction:column;gap:12px}
.footer__title{
  position:relative;padding-left:14px;
  font-size:.82rem;font-weight:700;letter-spacing:.22em;color:var(--text);
}
.footer__title::before{
  content:"";position:absolute;left:0;top:.55em;width:6px;height:6px;
  background:var(--gold);transform:rotate(45deg);
}
.footer__list{display:flex;flex-direction:column;gap:9px;font-size:.9rem;line-height:1.7}
.footer__list a{color:var(--muted)}
.footer__list a:hover{color:var(--gold-hi)}
.footer__list .mono{color:var(--text);font-size:.86rem}
.footer__contact .footer__list li{color:var(--muted);max-width:32ch}
.footer__hours{margin-top:10px;font-size:.78rem;line-height:1.8;color:var(--muted);max-width:34ch}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:clamp(28px,4vw,48px);padding-top:20px;
  border-top:1px solid var(--line);
  font-size:.78rem;color:var(--muted);letter-spacing:.06em;
}
.footer__copy,.footer__icp{font-family:var(--f-mono)}
.footer__legal{display:flex;flex-wrap:wrap;gap:10px 18px;margin-left:auto}
.footer__legal a{color:var(--muted)}
.footer__legal a:hover{color:var(--gold-hi)}

/* ================= 04 布局与章节 ================= */
.wrap{
  width:min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline:auto;
}
.section{padding:clamp(46px,7vw,102px) 0}
.section--tight{padding:clamp(28px,4vw,56px) 0}
.stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}
.stack--lg{gap:clamp(26px,4vw,52px)}
.grid{display:grid;gap:clamp(18px,2.4vw,30px);grid-template-columns:1fr}
.grid--2,.grid--3,.grid--7-5{display:grid;gap:clamp(18px,2.4vw,30px);grid-template-columns:1fr}
.section-head{
  display:grid;grid-template-columns:auto 1fr;gap:10px 18px;align-items:end;
  padding-bottom:18px;border-bottom:1px solid var(--line);
}
.section-head__no{
  font-family:var(--f-mono);font-size:clamp(34px,5.4vw,62px);
  font-weight:700;line-height:.86;color:var(--gold);letter-spacing:-.02em;
}
.section-head__title{font-size:clamp(1.5rem,2.9vw,2.4rem)}
.section-head__desc{grid-column:1/-1;font-size:.95rem;color:var(--muted);max-width:62ch}
.eyebrow{
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);
}
.vlabel{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:11px;letter-spacing:.42em;color:var(--muted);text-transform:uppercase;
}
.prose{font-size:1rem;line-height:1.85;color:var(--text);max-width:66ch}
.prose p+p{margin-top:1em}
.prose strong{color:var(--gold)}
.prose .mono{font-size:.92em;color:var(--cyan)}

/* ================= 05 组件 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.3em;border:1px solid transparent;border-radius:2px;
  font-size:.94rem;font-weight:700;letter-spacing:.06em;
  cursor:pointer;text-decoration:none;
  transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--gold{
  background:linear-gradient(135deg,var(--gold),var(--gold-hi));color:#17102C;
  box-shadow:0 10px 26px -16px rgba(242,196,107,.9);
}
.btn--gold:hover{color:#17102C;box-shadow:0 14px 30px -14px rgba(242,196,107,.95)}
html[data-theme="day"] .btn--gold{background:linear-gradient(135deg,#B57D14,#7E5406);color:#FFFFFF}
html[data-theme="day"] .btn--gold:hover{color:#FFFFFF}
.btn--ghost{
  border-color:rgba(79,227,208,.45);background:var(--cyan-wash);color:var(--cyan);
}
.btn--ghost:hover{background:rgba(79,227,208,.2);color:var(--gold-hi);border-color:var(--gold)}
.btn--line{border-color:var(--line);background:transparent;color:var(--text)}
.btn--line:hover{border-color:var(--gold);color:var(--gold-hi)}

.card{
  position:relative;
  padding:clamp(20px,2.6vw,32px);
  background:linear-gradient(150deg,rgba(20,26,69,.92),rgba(11,16,48,.82));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
html[data-theme="day"] .card{background:linear-gradient(150deg,#FFFFFF,#F2F5FF)}
.card--cut{
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  border:0;
  box-shadow:none;
  outline:1px solid var(--line);
  outline-offset:-1px;
}
.card__no{
  position:absolute;top:12px;right:16px;
  font-family:var(--f-mono);font-size:.7rem;letter-spacing:.18em;color:var(--cyan);
}
.card__title{font-size:clamp(1.06rem,1.7vw,1.32rem);margin-bottom:10px}
.card__text{font-size:.94rem;line-height:1.8;color:var(--muted)}
.card__meta{
  display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);
  font-family:var(--f-mono);font-size:.74rem;letter-spacing:.1em;color:var(--muted);
}
.card__link{font-size:.88rem;font-weight:700;letter-spacing:.06em;color:var(--gold)}
.card__link:hover{color:var(--gold-hi)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  border:1px solid var(--line);background:rgba(37,48,115,.28);
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.14em;color:var(--muted);
}
.chip--hot{border-color:rgba(255,79,163,.45);background:rgba(255,79,163,.12);color:var(--magenta)}
.chip--new{border-color:rgba(79,227,208,.45);background:var(--cyan-wash);color:var(--cyan)}
.chip--ok{border-color:rgba(42,227,139,.45);background:rgba(42,227,139,.1);color:var(--green)}

.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) 55%,transparent);
}
.tl-item{position:relative;padding-bottom:clamp(18px,2.4vw,28px)}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-28px;top:.62em;width:11px;height:11px;
  background:var(--ink-900);border:1px solid var(--gold);transform:rotate(45deg);
}
html[data-theme="day"] .tl-item::before{background:#FFFFFF}
.tl-time{
  display:block;font-family:var(--f-mono);font-size:.78rem;
  letter-spacing:.1em;color:var(--gold);margin-bottom:6px;
}
.tl-title{font-size:1rem;font-weight:700;margin-bottom:6px}
.tl-text{font-size:.92rem;line-height:1.8;color:var(--muted)}

.tabs{display:block}
.tabs__list{
  display:flex;flex-wrap:wrap;gap:6px;
  border-bottom:1px solid var(--line);margin-bottom:22px;
}
.tabs__btn{
  appearance:none;cursor:pointer;
  padding:10px 16px;border:1px solid transparent;border-bottom:0;
  border-radius:2px 2px 0 0;
  color:var(--muted);font-size:.9rem;font-weight:700;letter-spacing:.06em;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.tabs__btn:hover{color:var(--gold-hi);background:var(--gold-wash)}
.tabs__btn[aria-selected="true"]{
  color:var(--gold-hi);background:var(--gold-wash);box-shadow:inset 0 -2px 0 var(--gold);
}
.tabs__panel[hidden]{display:none}
.tabs__panel{animation:fade-in var(--t-mid) var(--ease) both}
@keyframes fade-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.fold{
  border:1px solid var(--line);background:rgba(20,26,69,.5);
  margin-bottom:10px;
}
html[data-theme="day"] .fold{background:rgba(255,255,255,.8)}
.fold__btn{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:15px 18px;cursor:pointer;text-align:left;
  font-size:.98rem;font-weight:700;letter-spacing:.04em;color:var(--text);
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.fold__btn:hover{color:var(--gold-hi);background:var(--gold-wash)}
.fold__sign{
  flex:none;width:20px;height:20px;position:relative;
  border:1px solid var(--line);
}
.fold__sign::before,.fold__sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--gold);
  transform:translate(-50%,-50%);
}
.fold__sign::before{width:9px;height:1px}
.fold__sign::after{width:1px;height:9px;transition:opacity var(--t-fast) var(--ease)}
.fold[data-open] .fold__sign::after{opacity:0}
.fold__panel{display:none;padding:0 18px 18px;font-size:.92rem;line-height:1.85;color:var(--muted)}
.fold[data-open] .fold__panel{display:block}

.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;width:100%;
  border:1px solid var(--line);
  background:
    linear-gradient(120deg,rgba(79,227,208,.12),transparent 55%),
    linear-gradient(150deg,#141A45,#0B1030);
}
.media--21x9{aspect-ratio:21/9}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media img,.media__img,.media video{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,rgba(242,196,107,.14),transparent 46%);
}
.media__cap{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:7px 12px;background:rgba(11,16,48,.82);
  border-top:1px solid var(--line);border-right:1px solid var(--line);
  font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;color:var(--muted);
}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:.8rem;letter-spacing:.06em;color:var(--muted);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line);margin-right:2px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--gold-hi)}
.breadcrumb [aria-current="page"]{color:var(--gold)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__num{
  font-family:var(--f-mono);font-size:clamp(1.6rem,3.4vw,2.5rem);
  font-weight:700;line-height:1;color:var(--gold);letter-spacing:-.01em;
}
.stat__label{font-size:.8rem;letter-spacing:.14em;color:var(--muted)}

/* 滚动显现（仅 JS 启用且允许动效时生效） */
html[data-motion="on"] [data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity 460ms var(--ease),transform 460ms var(--ease);
}
html[data-motion="on"] [data-reveal].is-in{opacity:1;transform:none}

/* ================= 06 平板 ================= */
@media (min-width:640px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:768px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
  .footer__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:900px){
  .footer__inner{grid-template-columns:minmax(230px,1fr) minmax(0,2.1fr) minmax(230px,1fr)}
}

/* ================= 07 桌面：轨道导航 ================= */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .topbar{display:none}
  .nav-toggle{display:none}
  .scroll-progress{left:var(--rail-w)}
  .rail{
    width:var(--rail-w);
    padding:24px 10px 20px;
    gap:20px;
    transform:none;visibility:visible;
    overflow-y:auto;
    box-shadow:none;
  }
  .rail-scrim{display:none}
  .rail__brand{align-items:center;text-align:center}
  .rail__tag{text-align:center}
  .rail__nav{align-items:center;gap:6px;width:100%}
  .rail__link{
    flex-direction:column;gap:6px;
    padding:9px 6px;width:100%;
    border-left:0;border-top:2px solid transparent;
    text-align:center;
  }
  .rail__link[aria-current="page"]{
    border-left-color:transparent;border-top-color:var(--gold);
    background:linear-gradient(180deg,rgba(242,196,107,.16),rgba(242,196,107,.02));
  }
  .rail__icon{min-width:0;font-size:.64rem}
  .rail__label{
    writing-mode:vertical-rl;text-orientation:upright;
    font-size:.8rem;letter-spacing:.16em;line-height:1.1;
  }
  .rail__foot{gap:14px;align-items:center}
  .status-capsule{
    flex-direction:row;justify-content:center;
    padding:6px 8px;font-size:.64rem;letter-spacing:.08em;width:100%;
  }
  .rail__cta{
    writing-mode:vertical-rl;text-orientation:upright;
    padding:16px 8px;letter-spacing:.2em;font-size:.8rem;
    background:linear-gradient(180deg,var(--gold),var(--gold-hi));
  }
  html[data-theme="day"] .rail__cta{background:linear-gradient(180deg,#B57D14,#7E5406)}
  .theme-toggle{
    align-self:center;flex-direction:column;gap:4px;
    padding:8px 6px;width:100%;justify-content:center;
  }
  .section-head__title{font-size:clamp(1.8rem,2.6vw,2.6rem)}
}

/* ================= 08 大屏 ================= */
@media (min-width:1440px){
  :root{--rail-w:112px}
  .rail{padding:30px 12px 24px}
}

/* ================= 09 无动画偏好 ================= */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html[data-motion="on"] [data-reveal]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
  .btn:hover{transform:none}
}