/* ========== 1. Reset ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,picture{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
table{border-collapse:collapse;width:100%}
:where(a,button,input,summary,[tabindex]):focus-visible{
  outline:2px solid var(--paper);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(255,106,43,.55);
}

/* ========== 2. Tokens ========== */
:root{
  --ink:#0B0D0C;
  --coal:#171B18;
  --gold:#D9A441;
  --gold-bright:#F4CB6A;
  --grass:#79F06A;
  --signal:#FF6A2B;
  --stone:#A8B0A6;
  --paper:#F6F1E6;
  --moss:#60735A;
  --clay:#A95D3F;
  --rail-w:264px;
  --gutter:clamp(16px,4vw,56px);
  --maxw:1440px;
  --line:rgba(217,164,65,.26);
  --line-soft:rgba(246,241,230,.12);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  --font-num:"DIN Condensed","Barlow Condensed","Oswald","Impact",var(--font-sans);
}

/* ========== 3. 基础排版 ========== */
body{
  min-height:100vh;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(246,241,230,.018) 0 1px, transparent 1px 3px),
    radial-gradient(1100px 620px at 86% -14%, rgba(217,164,65,.14), transparent 62%),
    radial-gradient(880px 560px at 6% 106%, rgba(96,115,90,.18), transparent 66%);
  font-family:var(--font-sans);
  font-size:clamp(15px,1.05vw,16.5px);
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:1080px){
  body{padding-inline-start:var(--rail-w)}
}
h1,h2,h3,h4,h5{line-height:1.2;font-weight:800;letter-spacing:-.01em;text-wrap:balance}
p{text-wrap:pretty}
strong{font-weight:700;color:var(--gold-bright)}
::selection{background:var(--gold);color:var(--ink)}

/* ========== 4. 容器与章节 ========== */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(32px,4.6vw,72px)}
.section__head{display:grid;gap:10px;margin-block-end:clamp(18px,2.4vw,30px)}
.section__title{
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.22;
  color:var(--paper);
}
.section__lead{max-width:40ch;color:var(--stone);font-size:clamp(14px,1.2vw,16px)}
.section__note{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:#7d857c;
  padding-inline-start:10px;
  border-inline-start:2px solid var(--moss);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--gold);
  flex:0 0 auto;
}

/* ========== 5. 按钮 ========== */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--paper);
  --btn-bd:var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  background:var(--btn-bg);
  color:var(--btn-fg);
  border:1px solid var(--btn-bd);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  text-align:center;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
.btn--gold{--btn-bg:var(--gold);--btn-fg:var(--ink);--btn-bd:var(--gold)}
.btn--gold:hover{--btn-bg:var(--gold-bright);--btn-bd:var(--gold-bright);color:var(--ink)}
.btn--ghost{--btn-fg:var(--stone)}
.btn--ghost:hover{--btn-fg:var(--gold-bright)}
.btn--block{width:100%}

/* ========== 6. 标签与数据胶囊 ========== */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  line-height:1.6;
  color:var(--stone);
  border:1px solid var(--line);
  white-space:nowrap;
}
.tag--gold{background:var(--gold);border-color:var(--gold);color:var(--ink);font-weight:700}
.tag--grass{color:var(--grass);border-color:rgba(121,240,106,.45)}
.tag--signal{color:var(--signal);border-color:rgba(255,106,43,.5)}
.tag--moss{color:#cbd8c5;border-color:rgba(96,115,90,.75);background:rgba(96,115,90,.22)}
.tag-list{display:flex;flex-wrap:wrap;gap:6px}

/* ========== 7. 数据组件 ========== */
.stat{display:flex;flex-direction:column;gap:2px}
.stat__num{
  font-family:var(--font-num);
  font-weight:700;
  font-size:clamp(30px,4vw,52px);
  line-height:.95;
  letter-spacing:-.01em;
  color:var(--gold-bright);
  font-variant-numeric:tabular-nums;
}
.stat__unit{
  font-family:var(--font-mono);
  font-size:.4em;
  letter-spacing:.08em;
  color:var(--stone);
  margin-inline-start:3px;
}
.stat__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--stone);
}
.data-table{font-size:14px}
.data-table thead th{
  padding:10px 12px;
  text-align:left;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stone);
  border-block-end:1px solid var(--line);
  white-space:nowrap;
}
.data-table td{
  padding:11px 12px;
  border-block-end:1px solid rgba(246,241,230,.07);
  vertical-align:middle;
}
.data-table tbody tr:hover{background:rgba(217,164,65,.07)}
.data-table__num{
  text-align:right;
  font-family:var(--font-num);
  font-size:17px;
  letter-spacing:.02em;
  color:var(--paper);
  font-variant-numeric:tabular-nums;
}

/* ========== 8. 面板 ========== */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(165deg, rgba(23,27,24,.94), rgba(11,13,12,.94));
  border:1px solid var(--line-soft);
}
.panel--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);
}

/* ========== 9. 图片容器 ========== */
.media{
  position:relative;
  overflow:hidden;
  background:
    repeating-linear-gradient(0deg, rgba(246,241,230,.05) 0 1px, transparent 1px 5px),
    linear-gradient(150deg,#1A211B,#0B0D0C);
  border:1px solid var(--line-soft);
}
.media--ratio{aspect-ratio:16/9}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media > img,.media > picture > img,.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,transparent 55%,rgba(11,13,12,.75) 100%),
    repeating-linear-gradient(0deg, rgba(0,0,0,.16) 0 1px, transparent 1px 4px);
}
.media__caption{
  position:absolute;
  inset-block-end:0;
  inset-inline:0;
  z-index:1;
  padding:12px 14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--stone);
}

/* ========== 10. 面包屑 ========== */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__link{color:var(--stone);transition:color .18s ease}
.breadcrumb__link:hover{color:var(--gold-bright)}
.breadcrumb__sep{color:#4d544c}
.breadcrumb__current{color:var(--paper)}

/* ========== 11. Skip link ========== */
.skip-link{
  position:fixed;
  inset-block-start:8px;
  inset-inline-start:8px;
  z-index:200;
  padding:10px 16px;
  background:var(--gold);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  transform:translateY(-200%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ========== 12. Header / 品牌轨道 ========== */
.site-header{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  z-index:80;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  gap:clamp(16px,2vw,24px);
  padding:clamp(20px,2.2vw,30px) clamp(16px,1.8vw,22px) clamp(18px,2vw,24px);
  overflow-y:auto;
  overscroll-behavior:contain;
  background:linear-gradient(180deg,#12160F 0%,#0B0D0C 44%,#0C0F0C 100%);
  border-inline-end:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(0,0,0,.55);
}
.site-header::before{
  content:"";
  position:absolute;
  inset-block-start:0;
  inset-inline-end:-1px;
  width:1px;
  height:128px;
  background:linear-gradient(180deg,var(--gold-bright),rgba(217,164,65,0));
}
.site-header__top{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.site-header__brandline{
  font-family:var(--font-serif);
  font-size:12.5px;
  line-height:1.7;
  color:var(--stone);
  padding-inline-start:12px;
  border-inline-start:1px solid var(--line);
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px}
.brand__mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:700;
  color:var(--ink);
  background:linear-gradient(150deg,var(--gold-bright),var(--gold) 58%,#a97b28);
  clip-path:polygon(0 0,100% 0,100% 74%,76% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.15}
.brand__name{font-size:18px;font-weight:800;letter-spacing:.06em;color:var(--paper)}
.brand__tag{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:#77806f;
}
.brand--footer .brand__mark{width:38px;height:38px;font-size:17px}
.brand--footer .brand__name{font-size:17px}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--line);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-bright)}
.nav-toggle__bars{position:relative;width:16px;height:10px;flex:0 0 auto}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  inset-inline:0;
  height:1.5px;
  background:currentColor;
  transition:transform .2s ease,top .2s ease,bottom .2s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.site-header[data-open] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{bottom:4.5px;transform:rotate(-45deg)}

/* 搜索 */
.rail-search{display:flex;flex-direction:column;gap:6px}
.rail-search__label{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--moss);
}
.rail-search__input{
  width:100%;
  padding:10px 12px;
  background:rgba(246,241,230,.045);
  border:1px solid var(--line-soft);
  font-size:13px;
  color:var(--paper);
  transition:border-color .18s ease,background-color .18s ease;
}
.rail-search__input::placeholder{color:#6f776d}
.rail-search__input:hover{border-color:rgba(217,164,65,.42)}
.rail-search__input:focus{border-color:var(--gold);background:rgba(217,164,65,.1);outline:none}
.rail-search__input:focus-visible{outline:2px solid var(--paper);outline-offset:2px}

/* 主导航 */
.primary-nav{counter-reset:nav;flex:1 1 auto}
.primary-nav__list{display:flex;flex-direction:column;gap:2px}
.primary-nav__item{counter-increment:nav}
.primary-nav__link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 10px 9px 8px;
  font-size:14.5px;
  font-weight:500;
  color:var(--stone);
  border-inline-start:2px solid transparent;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.primary-nav__link::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:#5a635a;
  transition:color .18s ease;
}
.primary-nav__link:hover{
  color:var(--paper);
  background:rgba(246,241,230,.05);
  border-inline-start-color:var(--gold-bright);
}
.primary-nav__link:hover::before{color:var(--gold)}
.primary-nav__link[aria-current="page"]{
  color:var(--ink);
  background:var(--gold);
  border-inline-start-color:var(--gold-bright);
  font-weight:700;
}
.primary-nav__link[aria-current="page"]::before{color:rgba(11,13,12,.68)}

/* 轨道底部行动区 */
.rail-cta{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-block-start:auto;
  padding-block-start:18px;
  border-block-start:1px solid var(--line-soft);
}
.rail-cta__note{
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.6;
  letter-spacing:.1em;
  color:#77806f;
}

/* ========== 13. 阅读进度 ========== */
.scroll-progress{
  position:fixed;
  inset-block-end:0;
  inset-inline:0;
  z-index:90;
  height:2px;
  background:rgba(246,241,230,.08);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright) 55%,var(--grass));
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  transition:transform .1s linear;
}

/* ========== 14. Footer ========== */
.site-footer{
  position:relative;
  margin-block-start:clamp(56px,7vw,112px);
  border-block-start:1px solid var(--line);
  background:linear-gradient(180deg, rgba(23,27,24,.85), rgba(9,11,9,.98) 62%);
  padding-block:clamp(36px,4.6vw,64px) clamp(18px,2.4vw,28px);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset-block-start:-1px;
  inset-inline-start:0;
  width:min(240px,42%);
  height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright),rgba(244,203,106,0));
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,3.4vw,48px);
}
.site-footer__summary{
  max-width:36ch;
  margin-block-start:14px;
  font-size:14px;
  line-height:1.8;
  color:var(--stone);
}
.site-footer__brand .tag-list{margin-block-start:16px}
.footer-heading{
  margin-block-end:14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
}
.footer-nav__list{display:grid;gap:1px}
.footer-nav__link{
  display:inline-block;
  padding-block:5px;
  font-size:14px;
  color:var(--stone);
  transition:color .18s ease,transform .18s ease;
}
.footer-nav__link:hover{color:var(--gold-bright);transform:translateX(3px)}
.footer-contact__list{display:grid;gap:10px;font-size:13.5px}
.footer-contact__key{
  display:block;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--moss);
}
.footer-contact__val{color:var(--paper);word-break:break-word}
.footer-contact__note{
  margin-block-start:14px;
  padding-inline-start:10px;
  border-inline-start:2px solid var(--clay);
  font-size:12.5px;
  line-height:1.75;
  color:#7d857c;
}
.site-footer__bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-block-start:clamp(28px,3.4vw,48px);
  padding-block-start:16px;
  border-block-start:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:#7d857c;
}
.legal-links{display:flex;flex-wrap:wrap;gap:16px}
.legal-links__link{color:var(--stone);transition:color .18s ease}
.legal-links__link:hover{color:var(--gold-bright)}
.site-footer__icp{color:#6b736a}

/* ========== 15. 进入动效 ========== */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease,transform .5s ease;
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ========== 16. 响应式 ========== */
@media (min-width:720px){
  .site-footer__grid{grid-template-columns:1fr 1fr}
  .site-footer__brand{grid-column:1 / -1}
}
@media (min-width:1080px){
  .site-footer__grid{grid-template-columns:1.7fr .9fr 1.15fr}
  .site-footer__brand{grid-column:auto}
}
@media (max-width:1079px){
  .site-header{
    position:sticky;
    inset:auto;
    inset-block-start:0;
    width:auto;
    height:auto;
    max-height:none;
    overflow:visible;
    gap:10px;
    padding:10px clamp(14px,4vw,24px) 12px;
    border-inline-end:0;
    border-block-end:1px solid var(--line);
    background:linear-gradient(180deg, rgba(11,13,12,.98), rgba(11,13,12,.9));
    box-shadow:0 10px 24px -20px rgba(0,0,0,.9);
  }
  .site-header::before{display:none}
  .site-header__top{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
  }
  .nav-toggle{display:inline-flex}
  .site-header__brandline{display:none}
  .rail-search{order:3;gap:0}
  .rail-search__label{display:none}
  .rail-search__input{padding:8px 10px;font-size:12.5px}
  .primary-nav{display:none;order:4;flex:0 0 auto;width:100%}
  .site-header[data-open] .primary-nav,
  .primary-nav[data-open]{display:block}
  .primary-nav__list{
    flex-direction:row;
    gap:8px;
    padding-block:4px 2px;
    overflow-x:auto;
    overscroll-behavior-x:contain;
    scrollbar-width:thin;
  }
  .primary-nav__item{flex:0 0 auto}
  .primary-nav__link{
    padding:8px 12px;
    font-size:13.5px;
    border:1px solid var(--line-soft);
    border-inline-start-width:1px;
  }
  .primary-nav__link[aria-current="page"]{border-color:var(--gold)}
  .rail-cta{display:none;order:5;margin-block-start:0;padding-block-start:10px}
  .site-header[data-open] .rail-cta{display:flex}
  .site-footer__bar{justify-content:flex-start;gap:10px 20px}
}
@media (max-width:479px){
  .brand__mark{width:34px;height:34px;font-size:16px}
  .brand__name{font-size:16px}
  .brand__tag{font-size:8px;letter-spacing:.2em}
  .nav-toggle{padding:7px 10px;font-size:10.5px}
  .section__note{font-size:10.5px}
  .stat__num{font-size:30px}
}

/* ========== 17. 降低动态 ========== */
@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.js [data-reveal]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
  .footer-nav__link:hover{transform:none}
}