:root{
  --ld-night:#0F1A2E;
  --ld-indigo:#1B2A4A;
  --ld-red:#C0392B;
  --ld-gold:#F5B041;
  --ld-orange:#FF8C42;
  --ld-jade:#3E8E7E;
  --ld-cream:#FBF3E4;
  --ld-sand:#F6E3C5;
  --ld-ink:#2B1D16;
  --ld-gray:#6E6259;
  --ld-wick:#FFF9F0;
  --ld-max:1280px;
  --ld-gutter:32px;
  --ld-header-h:72px;
  --ld-header-h-compact:56px;
  --ld-radius:14px;
  --ld-display:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong","SimSun",serif;
  --ld-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --ld-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ld-shadow:0 18px 40px rgba(43,29,22,.12);
  --ld-shadow-lg:0 30px 70px rgba(15,26,46,.22);
  --ld-glow:0 0 0 1px rgba(245,176,65,.55),0 14px 34px rgba(255,140,66,.24);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--ld-body);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.02em;
  color:var(--ld-ink);
  background-color:var(--ld-cream);
  background-image:
    radial-gradient(900px 520px at 88% -10%,rgba(245,176,65,.18),transparent 70%),
    radial-gradient(720px 440px at -8% 24%,rgba(62,142,126,.10),transparent 68%);
}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4{font-family:var(--ld-display);font-weight:900;line-height:1.15;letter-spacing:-.01em;color:var(--ld-ink);margin:0 0 .6em}
p{margin:0 0 1em}
a{color:var(--ld-red);text-underline-offset:3px}
::selection{background:var(--ld-gold);color:var(--ld-night)}
:focus-visible{outline:3px solid var(--ld-orange);outline-offset:3px;border-radius:6px}
:target{scroll-margin-top:calc(var(--ld-header-h) + 16px)}
#main-content{scroll-margin-top:calc(var(--ld-header-h) + 8px)}
.ld-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.ld-container{width:100%;max-width:var(--ld-max);margin-inline:auto;padding-inline:var(--ld-gutter)}
.ld-mono{font-family:var(--ld-mono);letter-spacing:.08em}
.ld-rule{border:0;border-top:1px solid rgba(43,29,22,.14);margin:56px 0}
.ld-eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0 0 12px;font-family:var(--ld-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--ld-red)}
.ld-eyebrow::before{content:"";width:26px;height:2px;background:var(--ld-red)}
.ld-section-title{font-size:clamp(1.75rem,3.4vw,2.75rem);line-height:1.12;margin:0 0 .5em}
/* ---------- 页头：夜色命令栏 ---------- */
.ld-header{
  position:sticky;
  top:0;
  z-index:80;
  color:var(--ld-wick);
  background:linear-gradient(180deg,rgba(15,26,46,.98),rgba(27,42,74,.94));
  border-bottom:1px solid rgba(245,176,65,.34);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:box-shadow .3s ease,background .3s ease;
}
.ld-header[data-scrolled="true"]{box-shadow:0 14px 34px rgba(15,26,46,.42);background:linear-gradient(180deg,rgba(15,26,46,1),rgba(20,32,56,.97))}
.ld-skip{
  position:absolute;
  left:16px;
  top:-70px;
  z-index:200;
  padding:10px 18px;
  border-radius:0 0 10px 10px;
  background:var(--ld-gold);
  color:var(--ld-night);
  font-weight:700;
  text-decoration:none;
  transition:top .2s ease;
}
.ld-skip:focus{top:0}
.ld-header__inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:var(--ld-header-h);
  max-width:var(--ld-max);
  margin:0 auto;
  padding:0 var(--ld-gutter);
  transition:min-height .25s ease;
}
.ld-header[data-scrolled="true"] .ld-header__inner{min-height:var(--ld-header-h-compact)}
.ld-brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:inherit;text-decoration:none}
.ld-brand__seal{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  border-radius:7px;
  background:var(--ld-red);
  color:var(--ld-wick);
  font-family:var(--ld-display);
  font-size:19px;
  font-weight:900;
  line-height:1;
  transform:rotate(-2deg);
  box-shadow:inset 0 0 0 1px rgba(255,249,240,.38),0 8px 18px rgba(192,57,43,.35);
}
.ld-brand__text{display:flex;flex-direction:column;line-height:1.2}
.ld-brand__name{font-family:var(--ld-display);font-weight:900;font-size:17px;letter-spacing:.02em;color:var(--ld-wick)}
.ld-brand__tag{font-family:var(--ld-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ld-gold)}
.ld-nav{display:flex;align-items:center;justify-content:center;margin-inline:auto;min-width:0}
.ld-nav__list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.ld-nav__item{display:flex}
.ld-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:9px;
  color:rgba(255,249,240,.78);
  text-decoration:none;
  font-size:14px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .2s ease,background .2s ease,transform .2s ease;
}
.ld-nav__link:hover{color:var(--ld-wick);background:rgba(245,176,65,.14);transform:translateY(-1px)}
.ld-nav__dot{width:6px;height:6px;border-radius:50%;background:rgba(245,176,65,.45);transition:background .2s ease,box-shadow .2s ease}
.ld-nav__link:hover .ld-nav__dot{background:var(--ld-gold);box-shadow:0 0 10px rgba(245,176,65,.85)}
.ld-nav__link[aria-current="page"]{background:var(--ld-gold);color:var(--ld-night);font-weight:700;box-shadow:0 8px 20px rgba(245,176,65,.28)}
.ld-nav__link[aria-current="page"] .ld-nav__dot{background:var(--ld-red)}
.ld-header__meta{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.ld-header__utility{margin:0;font-family:var(--ld-mono);font-size:11px;letter-spacing:.06em;color:rgba(255,249,240,.56);white-space:nowrap}
.ld-header__chapter{
  display:none;
  padding:3px 9px;
  border:1px dashed rgba(245,176,65,.55);
  border-radius:999px;
  font-family:var(--ld-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--ld-gold);
  white-space:nowrap;
}
.ld-header[data-scrolled="true"] .ld-header__chapter[data-active="true"]{display:inline-block}
.ld-lantern{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:7px 13px 7px 11px;
  border-radius:999px;
  border:1px solid rgba(245,176,65,.52);
  background:rgba(255,140,66,.14);
  color:var(--ld-wick);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  text-decoration:none;
  white-space:nowrap;
  transition:background .25s ease,box-shadow .25s ease,transform .2s ease;
}
.ld-lantern:hover{background:rgba(255,140,66,.3);box-shadow:var(--ld-glow);transform:translateY(-1px)}
.ld-lantern__body{
  width:12px;
  height:16px;
  border-radius:6px/8px;
  background:linear-gradient(180deg,var(--ld-orange),var(--ld-red));
  box-shadow:0 0 12px rgba(255,140,66,.75);
  animation:ld-breathe 5s ease-in-out infinite;
}
.ld-lantern__label{display:inline-block}
.ld-nav-toggle{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  width:40px;
  height:40px;
  padding:0;
  border:1px solid rgba(245,176,65,.45);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
}
.ld-nav-toggle__bar{display:block;width:18px;height:2px;border-radius:2px;background:var(--ld-wick);transition:transform .25s ease,opacity .2s ease}
.ld-header[data-open="true"] .ld-nav-toggle__bar:nth-of-type(1){transform:translateY(7px) rotate(45deg)}
.ld-header[data-open="true"] .ld-nav-toggle__bar:nth-of-type(2){opacity:0}
.ld-header[data-open="true"] .ld-nav-toggle__bar:nth-of-type(3){transform:translateY(-7px) rotate(-45deg)}
.ld-progress{height:2px;background:rgba(245,176,65,.16)}
.ld-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--ld-gold),var(--ld-orange),var(--ld-red));transition:width .15s linear}
/* ---------- 页脚：灯廊 ---------- */
.ld-footer{
  position:relative;
  margin-top:120px;
  overflow:hidden;
  color:rgba(255,249,240,.76);
  background:
    radial-gradient(58% 120% at 84% 0%,rgba(245,176,65,.18),transparent 62%),
    linear-gradient(180deg,var(--ld-indigo) 0%,var(--ld-night) 56%,#0B1424 100%);
  border-top:1px solid rgba(245,176,65,.28);
}
.ld-footer::before{
  content:"";
  position:absolute;
  left:-12%;
  right:-12%;
  bottom:6%;
  height:320px;
  border-radius:50%;
  border:1px solid rgba(245,176,65,.14);
  transform:rotate(-4deg);
  pointer-events:none;
}
.ld-footer::after{
  content:"";
  position:absolute;
  left:-6%;
  right:-6%;
  bottom:-6%;
  height:240px;
  border-radius:50%;
  border:1px solid rgba(62,142,126,.18);
  transform:rotate(3deg);
  pointer-events:none;
}
.ld-footer__lanterns{
  position:relative;
  z-index:1;
  display:flex;
  justify-content:flex-end;
  gap:26px;
  max-width:var(--ld-max);
  margin:0 auto;
  padding:28px var(--ld-gutter) 0;
}
.ld-footer__lantern{
  position:relative;
  width:13px;
  height:18px;
  border-radius:7px/9px;
  background:linear-gradient(180deg,var(--ld-orange),var(--ld-red));
  box-shadow:0 0 16px rgba(255,140,66,.55);
  animation:ld-breathe 5.5s ease-in-out infinite;
}
.ld-footer__lantern::before{
  content:"";
  position:absolute;
  left:50%;
  top:-16px;
  width:1px;
  height:16px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(245,176,65,.7));
}
.ld-footer__lantern:nth-child(2n){animation-delay:.9s}
.ld-footer__lantern:nth-child(3n){animation-delay:1.7s;height:15px;opacity:.85}
.ld-footer__inner{position:relative;z-index:1;max-width:var(--ld-max);margin:0 auto;padding:22px var(--ld-gutter) 44px}
.ld-footer__top{display:flex;align-items:flex-start;justify-content:space-between;gap:32px;padding-bottom:28px;border-bottom:1px solid rgba(245,176,65,.2)}
.ld-footer__brand{min-width:0}
.ld-footer__brandline{margin:0 0 10px;font-family:var(--ld-display);font-weight:900;font-size:clamp(1.35rem,2.6vw,1.95rem);line-height:1.2;color:var(--ld-wick)}
.ld-footer__summary{margin:0;max-width:52ch;font-size:15px;line-height:1.9;color:rgba(255,249,240,.66)}
.ld-footer__seal{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:62px;
  height:62px;
  padding:4px;
  border-radius:10px;
  background:var(--ld-red);
  color:var(--ld-wick);
  font-family:var(--ld-display);
  font-size:19px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:.06em;
  writing-mode:vertical-rl;
  transform:rotate(-4deg);
  box-shadow:inset 0 0 0 2px rgba(255,249,240,.22),0 14px 30px rgba(192,57,43,.35);
}
.ld-footer__grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.5fr;gap:36px;padding:36px 0 32px}
.ld-footer__col{min-width:0}
.ld-footer__col-title{margin:0 0 14px;font-family:var(--ld-mono);font-size:12px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--ld-gold)}
.ld-footer__links{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.ld-footer__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:rgba(255,249,240,.8);
  font-size:15px;
  text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.ld-footer__link::before{content:"";width:5px;height:5px;border-radius:50%;background:rgba(245,176,65,.4);transition:background .2s ease,box-shadow .2s ease}
.ld-footer__link:hover{color:var(--ld-gold);transform:translateX(3px)}
.ld-footer__link:hover::before{background:var(--ld-orange);box-shadow:0 0 10px rgba(255,140,66,.9)}
.ld-footer__contact{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.ld-footer__contact-item{display:grid;gap:2px}
.ld-footer__contact-label{font-family:var(--ld-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:rgba(245,176,65,.76)}
.ld-footer__contact-value{font-size:14px;line-height:1.65;color:rgba(255,249,240,.86);overflow-wrap:anywhere}
.ld-footer__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-top:22px;
  border-top:1px solid rgba(245,176,65,.2);
  font-family:var(--ld-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(255,249,240,.55);
}
.ld-footer__legal,.ld-footer__copy{margin:0}
.ld-top-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 16px;
  border:1px solid rgba(245,176,65,.46);
  border-radius:999px;
  background:rgba(245,176,65,.1);
  color:var(--ld-wick);
  font-family:var(--ld-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  cursor:pointer;
  transition:background .25s ease,transform .2s ease,box-shadow .25s ease;
}
.ld-top-btn:hover{background:rgba(245,176,65,.26);transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,140,66,.22)}
/* ---------- 通用按钮 ---------- */
.ld-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--ld-body);
  font-size:15px;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.ld-btn:hover{transform:translateY(-2px)}
.ld-btn--primary{background:var(--ld-red);color:var(--ld-wick);box-shadow:0 12px 26px rgba(192,57,43,.28)}
.ld-btn--primary:hover{box-shadow:0 18px 36px rgba(192,57,43,.36)}
.ld-btn--gold{background:var(--ld-gold);color:var(--ld-night);box-shadow:0 12px 26px rgba(245,176,65,.3)}
.ld-btn--ghost{background:transparent;border-color:rgba(43,29,22,.5);color:var(--ld-ink)}
.ld-btn--ghost:hover{background:var(--ld-ink);border-color:var(--ld-ink);color:var(--ld-wick)}
.ld-btn--light{background:rgba(255,249,240,.08);border-color:rgba(245,176,65,.55);color:var(--ld-wick)}
.ld-btn--light:hover{background:rgba(245,176,65,.2)}
/* ---------- 面包屑 ---------- */
.ld-crumb{margin:0}
.ld-crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0;padding:0;list-style:none;font-family:var(--ld-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ld-gray)}
.ld-crumb__item{display:inline-flex;align-items:center;gap:8px}
.ld-crumb__item + .ld-crumb__item::before{content:"/";color:rgba(43,29,22,.28)}
.ld-crumb__link{color:var(--ld-gray);text-decoration:none;transition:color .2s ease}
.ld-crumb__link:hover{color:var(--ld-red)}
.ld-crumb__link[aria-current="page"]{color:var(--ld-ink);font-weight:700}
/* ---------- 正文 ---------- */
.ld-prose{max-width:720px;font-size:17px;line-height:1.9;color:var(--ld-ink)}
.ld-prose > *:first-child{margin-top:0}
.ld-prose p{margin:0 0 1.2em}
.ld-prose h2{font-size:1.6rem;margin:2em 0 .7em}
.ld-prose h3{font-size:1.2rem;margin:1.7em 0 .6em}
.ld-prose a{color:var(--ld-red);text-decoration-thickness:2px}
.ld-prose ul,.ld-prose ol{margin:0 0 1.2em;padding-left:1.35em}
.ld-prose li{margin-bottom:.5em}
.ld-prose strong{font-weight:700}
.ld-prose blockquote{margin:1.7em 0;padding:14px 22px;border-left:4px solid var(--ld-gold);border-radius:0 10px 10px 0;background:rgba(246,227,197,.62);color:var(--ld-ink)}
/* ---------- 面板：玻璃层与实色层 ---------- */
.ld-panel{padding:28px;border:1px solid rgba(43,29,22,.1);border-radius:var(--ld-radius);background:var(--ld-wick);box-shadow:var(--ld-shadow)}
.ld-panel--glass{
  background:rgba(246,227,197,.42);
  border-color:rgba(255,249,240,.6);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--ld-shadow-lg);
}
.ld-panel--dark{background:linear-gradient(160deg,var(--ld-indigo),var(--ld-night));border-color:rgba(245,176,65,.32);color:rgba(255,249,240,.82);box-shadow:var(--ld-shadow-lg)}
.ld-panel--dark h2,.ld-panel--dark h3{color:var(--ld-wick)}
/* ---------- 标签 ---------- */
.ld-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid rgba(245,176,65,.45);
  border-radius:999px;
  background:rgba(245,176,65,.18);
  color:#8A5A12;
  font-family:var(--ld-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  line-height:1.6;
}
.ld-tag--gold{background:rgba(245,176,65,.2);border-color:rgba(245,176,65,.52);color:#8A5A12}
.ld-tag--jade{background:rgba(62,142,126,.14);border-color:rgba(62,142,126,.46);color:#2A6B5D}
.ld-tag--red{background:rgba(192,57,43,.12);border-color:rgba(192,57,43,.42);color:#8F2A20}
/* ---------- 图片容器 ---------- */
.ld-media{margin:0;position:relative}
.ld-media__frame{
  position:relative;
  padding:1px;
  border-radius:var(--ld-radius);
  overflow:hidden;
  background:linear-gradient(150deg,rgba(245,176,65,.75),rgba(192,57,43,.45) 60%,rgba(62,142,126,.5));
  box-shadow:0 0 0 1px rgba(245,176,65,.28),0 22px 48px rgba(15,26,46,.18);
}
.ld-media__img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:calc(var(--ld-radius) - 1px);
  background:linear-gradient(150deg,var(--ld-indigo),var(--ld-night));
}
.ld-media__caption{margin-top:10px;font-family:var(--ld-mono);font-size:12px;letter-spacing:.08em;color:var(--ld-gray)}
.ld-media--wide .ld-media__img{aspect-ratio:21/9}
.ld-media--portrait .ld-media__img{aspect-ratio:3/4}
/* ---------- 网格 ---------- */
.ld-grid{display:grid;gap:32px}
.ld-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.ld-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.ld-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
/* ---------- 显现协议 ---------- */
[data-reveal]{transition:opacity .45s ease,transform .45s ease}
[data-reveal="pending"]{opacity:0;transform:translateY(24px)}
[data-reveal="in"]{opacity:1;transform:none}
@keyframes ld-breathe{
  0%,100%{opacity:.72;transform:scale(1)}
  50%{opacity:1;transform:scale(1.06)}
}
/* ---------- 响应式 ---------- */
@media (max-width:1120px){
  .ld-header__utility{display:none}
}
@media (max-width:1024px){
  .ld-grid{gap:24px}
  .ld-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ld-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ld-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:960px){
  .ld-header__inner{justify-content:space-between}
  .ld-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    margin:0;
    padding:14px var(--ld-gutter) 22px;
    max-height:calc(100vh - var(--ld-header-h));
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(15,26,46,.99),rgba(27,42,74,.99));
    border-bottom:1px solid rgba(245,176,65,.32);
    box-shadow:0 30px 50px rgba(15,26,46,.5);
  }
  .ld-header[data-open="true"] .ld-nav{display:flex}
  .ld-nav__list{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .ld-nav__link{padding:13px 14px;border-radius:10px;font-size:15px}
  .ld-nav-toggle{display:inline-flex}
  .ld-lantern{padding:7px 11px;font-size:12px}
}
@media (max-width:720px){
  :root{--ld-gutter:20px}
  .ld-brand__tag{display:none}
  .ld-grid--2,.ld-grid--3,.ld-grid--4{grid-template-columns:1fr}
  .ld-footer{margin-top:80px}
  .ld-footer__top{flex-direction:column;gap:20px}
  .ld-footer__seal{width:50px;height:50px;font-size:16px}
  .ld-footer__grid{grid-template-columns:1fr;gap:24px;padding:28px 0}
  .ld-footer__meta{flex-direction:column;align-items:flex-start;gap:10px}
  .ld-top-btn{margin-left:0}
  .ld-panel{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal="pending"]{opacity:1;transform:none}
  .ld-lantern__body,.ld-footer__lantern{animation:none}
}