:root{
  --gold-500:#C9A227;
  --gold-700:#8A6A1F;
  --gold-200:#EBD9A0;
  --ink-900:#0E1A2B;
  --ink-700:#17283F;
  --ink-500:#2C4260;
  --paper-50:#FBF8F1;
  --paper-100:#F2ECDF;
  --cinnabar:#B23A2E;
  --slate:#5C6A7C;

  --line:rgba(44,66,96,.18);
  --line-strong:rgba(44,66,96,.34);
  --line-light:rgba(251,248,241,.16);
  --gold-line:rgba(201,162,39,.42);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --ease-out:cubic-bezier(.22,.61,.36,1);
  --crown:polygon(0% 100%,0% 22%,26% 54%,50% 0%,74% 54%,100% 22%,100% 100%);
  --shadow-panel:0 20px 44px rgba(14,26,43,.34);
}

*,
*::before,
*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background-color:var(--paper-50);
  background-image:repeating-linear-gradient(180deg,rgba(44,66,96,.048) 0 1px,transparent 1px 34px);
  color:var(--ink-900);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--ink-900);
}
h1{font-weight:900;font-size:clamp(30px,5.4vw,60px);line-height:1.1}
h2{font-size:clamp(23px,3.2vw,36px)}
h3{font-size:clamp(18px,2.2vw,22px)}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

ul,ol,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}

a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img{display:block;max-width:100%;height:auto}
strong{font-weight:700}

:focus-visible{
  outline:2px solid var(--gold-500);
  outline-offset:3px;
  border-radius:2px;
}
.site-footer :focus-visible,
.section--ink :focus-visible{outline-color:var(--gold-200)}

::selection{background:rgba(201,162,39,.28);color:var(--ink-900)}

/* ============ 跳过链接 ============ */
.skip-link{
  position:absolute;
  top:-72px;
  left:var(--gutter);
  z-index:80;
  padding:10px 18px;
  background:var(--ink-900);
  color:var(--paper-50);
  font-size:13.5px;
  letter-spacing:.04em;
  border-radius:2px;
  border:1px solid var(--gold-line);
  transition:top .18s var(--ease-out);
}
.skip-link:focus{top:10px}

/* ============ 阅读进度 ============ */
.read-progress{
  position:absolute;
  top:0;
  left:0;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--gold-700),var(--gold-500) 70%,var(--gold-200));
  pointer-events:none;
}

/* ============ 页头 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(251,248,241,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.site-header__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:9px var(--gutter);
  min-height:62px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-width:0;
  flex:0 1 auto;
}
.brand__crest{
  position:relative;
  display:block;
  flex:none;
  width:22px;
  height:19px;
}
.brand__crest::before{
  content:"";
  position:absolute;
  inset:0;
  background:var(--gold-500);
  clip-path:var(--crown);
}
.brand__crest::after{
  content:"";
  position:absolute;
  inset:1.5px;
  background:var(--paper-50);
  clip-path:var(--crown);
}
.brand__text{
  display:flex;
  flex-direction:column;
  min-width:0;
  line-height:1.1;
}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:.01em;
  color:var(--ink-900);
  white-space:nowrap;
}
.brand__sub{
  margin-top:3px;
  font-size:11px;
  letter-spacing:.06em;
  color:var(--gold-700);
  white-space:nowrap;
}

/* 导航胶囊 */
.nav{
  position:relative;
  display:flex;
  align-items:center;
  gap:2px;
  padding:3px;
  border-radius:999px;
  background:var(--ink-700);
  border:1px solid rgba(201,162,39,.32);
  box-shadow:inset 0 1px 0 rgba(251,248,241,.07);
  flex:none;
}

.nav__toggle{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 11px;
  border-radius:999px;
  color:var(--paper-50);
  font-size:13px;
  line-height:1;
  letter-spacing:.04em;
  transition:background .18s var(--ease-out),color .18s var(--ease-out);
}
.nav__toggle:hover{background:rgba(251,248,241,.09)}
.nav__toggle[aria-expanded="true"]{
  background:rgba(201,162,39,.2);
  color:var(--gold-200);
}

.nav__bars{
  position:relative;
  display:block;
  flex:none;
  width:14px;
  height:9px;
  color:currentColor;
}
.nav__bars::before,
.nav__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:14px;
  height:1.5px;
  background:currentColor;
  transition:top .18s var(--ease-out),transform .18s var(--ease-out);
}
.nav__bars::before{top:0}
.nav__bars::after{top:7px}
.nav__toggle[aria-expanded="true"] .nav__bars::before{top:3.5px;transform:rotate(45deg)}
.nav__toggle[aria-expanded="true"] .nav__bars::after{top:3.5px;transform:rotate(-45deg)}

.nav__label{white-space:nowrap}

.nav__current{
  padding-left:7px;
  margin-left:1px;
  border-left:1px solid rgba(251,248,241,.24);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--gold-500);
  white-space:nowrap;
}

/* 批次胶囊 */
.batch-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 11px;
  border-radius:999px;
  background:rgba(251,248,241,.07);
  color:rgba(251,248,241,.94);
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background .18s var(--ease-out),color .18s var(--ease-out);
}
.batch-pill:hover{background:rgba(201,162,39,.22);color:var(--gold-200)}
.batch-pill__dot{
  display:block;
  flex:none;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--gold-500);
  animation:crown-pulse 2.4s ease-in-out infinite;
}
@keyframes crown-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(201,162,39,.55)}
  70%{box-shadow:0 0 0 5px rgba(201,162,39,0)}
}

/* 索引面板 */
.nav__panel{
  position:absolute;
  top:calc(100% + 10px);
  right:0;
  width:min(340px,88vw);
  max-height:min(66vh,420px);
  overflow-y:auto;
  padding:8px;
  background:var(--ink-900);
  border:1px solid rgba(201,162,39,.34);
  border-radius:3px;
  box-shadow:var(--shadow-panel);
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .18s var(--ease-out),transform .18s var(--ease-out),visibility .18s var(--ease-out);
}
.nav[data-open] .nav__panel{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

.nav__list{display:grid;gap:1px}
.nav__item{display:block}

.nav__link{
  display:flex;
  align-items:center;
  gap:11px;
  padding:10px 12px;
  border-radius:2px;
  color:var(--paper-50);
  font-size:14.5px;
  line-height:1.4;
  transition:background .18s var(--ease-out),color .18s var(--ease-out);
}
.nav__link:hover{
  background:rgba(201,162,39,.14);
  color:var(--gold-200);
}
.nav__index{
  flex:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--gold-700);
}
.nav__link[aria-current="page"]{
  color:var(--gold-500);
  background:rgba(201,162,39,.08);
}
.nav__link[aria-current="page"] .nav__index{color:var(--gold-500)}
.nav__link[aria-current="page"]::after{
  content:"";
  margin-left:auto;
  align-self:center;
  flex:none;
  width:18px;
  height:2px;
  background:var(--gold-500);
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  color:var(--paper-50);
  border-top:1px solid var(--gold-line);
  margin-top:0;
}
.footer__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(38px,6vw,66px) var(--gutter) clamp(26px,4vw,40px);
  display:grid;
  gap:clamp(26px,4vw,44px);
  grid-template-columns:minmax(0,1fr);
}

.footer__brand{
  position:relative;
  padding-right:52px;
}
.footer__crest{
  position:absolute;
  top:2px;
  right:0;
  width:34px;
  height:28px;
}
.footer__crest::before{
  content:"";
  position:absolute;
  inset:0;
  background:var(--gold-line);
  clip-path:var(--crown);
}
.footer__crest::after{
  content:"";
  position:absolute;
  inset:1px;
  background:var(--ink-900);
  clip-path:var(--crown);
}

.brand--footer .brand__name{color:var(--paper-50);font-size:18px}
.brand--footer .brand__sub{color:var(--gold-500)}
.brand--footer .brand__crest::before{background:var(--gold-500)}
.brand--footer .brand__crest::after{background:var(--ink-900)}

.footer__tagline{
  margin-top:16px;
  font-size:14px;
  line-height:1.7;
  color:rgba(251,248,241,.72);
  max-width:34ch;
}
.footer__icp{
  margin-top:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(251,248,241,.55);
}

.footer__zone{min-width:0}
.footer__title{
  margin:0 0 14px;
  font-family:var(--font-body);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--gold-500);
}
.footer__list{display:grid;gap:9px}
.footer__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:rgba(251,248,241,.82);
  transition:color .18s var(--ease-out);
}
.footer__link::before{
  content:"";
  flex:none;
  width:10px;
  height:1px;
  background:currentColor;
  opacity:.38;
  transition:opacity .18s var(--ease-out),width .18s var(--ease-out);
}
.footer__link:hover{color:var(--gold-500)}
.footer__link:hover::before{opacity:1;width:16px}

.contact-line{
  display:grid;
  gap:1px;
  margin:0 0 12px;
}
.contact-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:rgba(251,248,241,.5);
}
.contact-value{
  font-size:14px;
  line-height:1.65;
  color:var(--paper-50);
  overflow-wrap:anywhere;
  word-break:break-word;
}
.footer__hint{
  margin:14px 0 16px;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(251,248,241,.6);
  border-left:2px solid var(--gold-line);
  padding-left:10px;
}

.footer__bar{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:16px var(--gutter) 26px;
  border-top:1px solid var(--line-light);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px 24px;
}
.footer__copy{
  margin:0;
  font-size:12.5px;
  color:rgba(251,248,241,.55);
}

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

.section{padding-block:clamp(40px,7vw,84px)}
.section--paper{background:var(--paper-100)}
.section--ink{
  background:var(--ink-900);
  color:var(--paper-50);
}
.section--ink h1,
.section--ink h2,
.section--ink h3{color:var(--paper-50)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--gold-700);
}
.eyebrow::before{
  content:"";
  flex:none;
  width:22px;
  height:1px;
  background:var(--gold-500);
}
.section--ink .eyebrow{color:var(--gold-500)}

.lede{
  font-size:clamp(16px,1.8vw,19px);
  line-height:1.7;
  color:var(--slate);
  max-width:62ch;
}
.section--ink .lede{color:rgba(251,248,241,.78)}

/* ============ 栅格 ============ */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.col-3{grid-column:span 3;min-width:0}
.col-8{grid-column:span 8;min-width:0}
.col-9{grid-column:span 9;min-width:0}
.col-12{grid-column:span 12;min-width:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:14.5px;
  font-weight:500;
  line-height:1.2;
  letter-spacing:.02em;
  transition:background .18s var(--ease-out),color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.btn--gold{
  background:var(--gold-500);
  border-color:var(--gold-500);
  color:var(--ink-900);
}
.btn--gold:hover{background:var(--gold-200);border-color:var(--gold-200)}
.btn--ghost{
  border-color:var(--line-strong);
  color:var(--ink-900);
}
.btn--ghost:hover{border-color:var(--gold-700);color:var(--gold-700)}
.btn--light{
  border-color:var(--gold-line);
  color:var(--gold-200);
}
.btn--light:hover{
  background:rgba(201,162,39,.16);
  border-color:var(--gold-500);
  color:var(--gold-500);
}
.btn--sm{padding:9px 16px;font-size:13px}

/* ============ 面包屑 ============ */
.breadcrumb{font-size:13px;color:var(--slate)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--line-strong);
}
.breadcrumb__link{color:var(--slate);transition:color .18s var(--ease-out)}
.breadcrumb__link:hover{color:var(--gold-700)}
.breadcrumb__item[aria-current="page"]{color:var(--ink-700)}

/* ============ 图片容器 ============ */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:2px;
  background:var(--ink-700);
  aspect-ratio:16 / 9;
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--gold{border-color:var(--gold-line)}
.media-frame__caption{
  margin-top:8px;
  font-size:13px;
  line-height:1.6;
  color:var(--slate);
}

/* ============ 文本与数据 ============ */
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.note{
  padding-left:12px;
  border-left:2px solid var(--gold-200);
  font-size:13px;
  line-height:1.7;
  color:var(--slate);
}
.hairline{
  height:1px;
  border:0;
  margin:0;
  background:var(--line);
}

/* ============ 状态 ============ */
.status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  line-height:1.4;
  color:var(--ink-700);
}
.status__dot{
  display:block;
  flex:none;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--slate);
}
.status--live .status__dot{
  background:var(--gold-500);
  animation:crown-pulse 2.4s ease-in-out infinite;
}
.status--alert .status__dot{background:var(--cinnabar)}
.status--alert{color:var(--cinnabar)}

/* ============ 章节索引 ============ */
.spy{display:grid;gap:2px;align-content:start}
.spy-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:7px 0;
  border-bottom:1px solid var(--line);
  font-size:13.5px;
  line-height:1.5;
  color:var(--slate);
  transform-origin:left center;
  transition:color .18s var(--ease-out),transform .18s var(--ease-out);
}
.spy-link::before{
  content:"";
  flex:none;
  width:12px;
  height:1px;
  background:transparent;
  transition:background .18s var(--ease-out);
}
.spy-link:hover{color:var(--ink-900)}
.spy-link[aria-current="true"]{
  color:var(--gold-700);
  transform:scale(1.02);
}
.spy-link[aria-current="true"]::before{background:var(--gold-500)}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:16px;
  bottom:18px;
  z-index:60;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid var(--gold-line);
  background:var(--ink-700);
  color:var(--gold-500);
  font-family:var(--font-mono);
  font-size:15px;
  line-height:1;
  box-shadow:0 8px 22px rgba(14,26,43,.28);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s var(--ease-out),transform .2s var(--ease-out),visibility .2s var(--ease-out),background .18s var(--ease-out),color .18s var(--ease-out);
}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.to-top:hover{background:var(--gold-500);color:var(--ink-900)}

/* ============ 入场 ============ */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease-out),transform .5s var(--ease-out);
}
.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ============ 断点 ============ */
@media (max-width:479px){
  .brand__sub{display:none}
  .brand__crest{width:20px;height:17px}
  .brand__name{font-size:16px}
  .nav__toggle{gap:6px;padding:7px 10px}
  .batch-pill__text{display:none}
  .batch-pill{padding:8px}
}

@media (max-width:899px){
  .grid-12 > .col-3,
  .grid-12 > .col-8,
  .grid-12 > .col-9{grid-column:span 12}
  .col-3,.col-8,.col-9{grid-column:span 12}
}

@media (min-width:480px){
  .brand__name{font-size:18px}
  .brand__sub{font-size:11.5px}
  .brand__crest{width:24px;height:20px}
}

@media (min-width:680px){
  .footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:span 2;padding-right:64px}
  .footer__crest{width:42px;height:34px}
  .nav__panel{width:min(380px,70vw)}
}

@media (min-width:900px){
  .site-header__inner{min-height:70px;padding-block:11px}
  .brand__name{font-size:19px}
  .nav__toggle{font-size:13.5px;padding:8px 13px}
  .nav__current{font-size:12.5px}
  .footer__inner{padding-top:clamp(48px,5vw,68px)}
}

@media (min-width:1000px){
  .footer__inner{grid-template-columns:1.5fr .9fr .9fr 1.2fr}
  .footer__brand{grid-column:auto}
  .spy{position:sticky;top:88px}
  .nav__panel{width:400px}
}

@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;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
}