:root{
  --ink:#0B211C;
  --panel:#12161A;
  --cream:#F3EBDD;
  --brown:#241A12;
  --cyan:#2BF2D0;
  --amber:#FF9A2E;
  --red:#E4522B;
  --blue:#3D7BFF;
  --yellow:#F2C33C;
  --steel:#7C8A86;
  --rule:rgba(243,235,221,.16);
  --rule-2:rgba(243,235,221,.34);
  --focus-ring:#2BF2D0;
  --rail-w:64px;
  --bar-h:72px;
  --shadow-hard:6px 6px 0 rgba(0,0,0,.55);
  --shadow-paper:6px 6px 0 var(--brown);
  --t:160ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Helvetica Neue","Arial Narrow","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"DejaVu Sans Mono","Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
::selection{background:var(--amber);color:var(--brown)}

body{
  background:var(--ink);
  color:var(--cream);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:300;line-height:1.14;letter-spacing:-.01em}
h1{font-size:clamp(38px,5.4vw,72px)}
h2{font-size:clamp(26px,3.2vw,42px)}
h3{font-size:clamp(20px,2.2vw,26px)}
p{max-width:40ch}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}

/* ---------- 排版辅助 ---------- */
.display{font-family:var(--font-display);font-weight:300;font-size:clamp(44px,7vw,120px);line-height:1.02;text-transform:uppercase;letter-spacing:-.02em}
.lead{font-size:19px;line-height:1.85;max-width:40ch;color:rgba(243,235,221,.86)}
.kicker{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan)}
.meta{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;color:var(--steel)}
.data-num{display:inline-block;font-family:var(--font-mono);font-weight:700;font-size:clamp(56px,7vw,96px);line-height:.9;letter-spacing:-.03em;color:var(--amber)}
.data-num__unit{font-family:var(--font-mono);font-size:.26em;font-weight:400;letter-spacing:.08em;color:var(--steel);margin-left:.3em;vertical-align:baseline}
.rule{height:1px;border:0;background:var(--rule);margin:0}
.rule--strong{background:var(--rule-2)}

/* ---------- 布局 ---------- */
.shell{width:min(1240px,100% - 40px);margin-inline:auto}
.shell--wide{width:min(1520px,100% - 28px);margin-inline:auto}
main,.site-main{padding-top:var(--bar-h);display:block}
[data-hero-overlay]{margin-top:calc(-1 * var(--bar-h));padding-top:var(--bar-h)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:32px}
.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-12{grid-column:span 12}

/* ---------- 章节画板 ---------- */
.sec{padding:64px 0;border-top:1px solid var(--rule)}
.sec__head{display:flex;align-items:baseline;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.sec__num{font-family:var(--font-mono);font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--red);flex:0 0 auto}
.sec__title{font-family:var(--font-display);font-weight:300;font-size:clamp(26px,3.2vw,40px);line-height:1.1}
.sec__lead{max-width:40ch;margin-top:14px;color:rgba(243,235,221,.82)}

/* ---------- 面板 ---------- */
.panel{background:var(--panel);color:var(--cream);border:2px solid var(--brown);box-shadow:var(--shadow-hard);padding:28px}
.panel--paper{background:var(--cream);color:var(--brown);border-color:var(--brown);box-shadow:var(--shadow-paper);--focus-ring:var(--red)}
.panel--paper p{color:var(--brown)}
.panel--paper .meta,.panel--paper .data-num__unit{color:#6B5A4A}
.panel--outline{background:transparent;border:2px solid var(--rule-2);box-shadow:none}

/* ---------- 标签 ---------- */
.tag{display:inline-block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;padding:4px 10px;border:1px solid var(--rule-2);color:var(--cream);text-transform:uppercase;line-height:1.5}
.tag--cyan{border-color:var(--cyan);color:var(--cyan)}
.tag--amber{border-color:var(--amber);color:var(--amber)}
.tag--red{border-color:var(--red);color:var(--red)}
.tag--blue{border-color:var(--blue);color:var(--blue)}
.tag--yellow{border-color:var(--yellow);color:var(--yellow)}
.panel--paper .tag{color:var(--brown);border-color:var(--brown)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 20px;border:2px solid var(--cream);background:transparent;color:var(--cream);font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;cursor:pointer;transition:transform var(--t) var(--ease),background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease)}
.btn:hover,.btn:focus-visible{background:var(--cyan);border-color:var(--cyan);color:var(--brown);transform:translate(-2px,-2px);box-shadow:var(--shadow-hard)}
.btn--primary{background:var(--amber);border-color:var(--amber);color:var(--brown);font-weight:700}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--cream);border-color:var(--cream);color:var(--brown)}
.btn--ghost{border-color:var(--rule-2);color:var(--steel)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:transparent;border-color:var(--cyan);color:var(--cyan);transform:none;box-shadow:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--steel)}
.breadcrumb a{color:var(--cream);border-bottom:1px solid var(--rule-2);transition:color var(--t) var(--ease),border-color var(--t) var(--ease)}
.breadcrumb a:hover{color:var(--cyan);border-color:var(--cyan)}
.breadcrumb__sep{color:var(--red)}
.breadcrumb [aria-current="page"]{color:var(--cyan)}

/* ---------- 图片容器 ---------- */
.img-frame{position:relative;display:block;width:100%;aspect-ratio:16/9;background:var(--panel);border:2px solid var(--rule-2);box-shadow:var(--shadow-hard);overflow:hidden}
.img-frame::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(12deg,rgba(43,242,208,.07) 0 2px,transparent 2px 16px);pointer-events:none;z-index:1}
.img-frame img{width:100%;height:100%;object-fit:cover;position:relative;z-index:0}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--square{aspect-ratio:1/1}
.img-frame--map{aspect-ratio:4/3}
.img-frame__tag{position:absolute;left:12px;bottom:12px;z-index:3;background:rgba(11,33,28,.84);color:var(--cyan);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;padding:5px 9px;border:1px solid rgba(43,242,208,.5)}
.img-frame__grid{position:absolute;inset:0;z-index:2;pointer-events:none;background-image:linear-gradient(rgba(43,242,208,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(43,242,208,.16) 1px,transparent 1px);background-size:56px 56px}

/* ---------- 跳转链接 ---------- */
.skip-link{position:fixed;top:-80px;left:16px;z-index:300;background:var(--cyan);color:var(--brown);font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;padding:11px 18px;border:2px solid var(--brown);transition:top var(--t) var(--ease)}
.skip-link:focus{top:12px}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  --hdr-shadow:0 1px 0 rgba(36,26,18,.9),0 -1px 0 rgba(36,26,18,.85),1px 0 0 rgba(36,26,18,.8),-1px 0 0 rgba(36,26,18,.8);
}
.site-header[data-scrolled="true"]{--hdr-shadow:none}
.site-header__bar{
  display:flex;align-items:center;gap:18px;
  height:var(--bar-h);padding:0 18px;
  background:transparent;border-bottom:2px solid transparent;
  transition:background-color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-header[data-scrolled="true"] .site-header__bar{background:var(--panel);border-bottom-color:var(--cyan)}
.bar-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--cyan);transform:scaleX(var(--p,0));transform-origin:0 50%;transition:transform 90ms linear}

.brand{display:flex;align-items:center;gap:12px;min-width:0;flex:0 1 auto}
.brand__mark{width:36px;height:36px;flex:0 0 auto;display:grid;place-items:center;border:2px solid var(--cyan);background:rgba(43,242,208,.08)}
.brand__pips{display:flex;align-items:flex-end;gap:3px;height:16px}
.brand__pips i{display:block;width:3px;background:var(--cyan)}
.brand__pips i:nth-child(1){height:8px}
.brand__pips i:nth-child(2){height:16px}
.brand__pips i:nth-child(3){height:11px;background:var(--amber)}
.brand__text{display:block;min-width:0}
.brand__name{display:block;font-family:var(--font-display);font-size:19px;font-weight:400;letter-spacing:.02em;line-height:1.2;white-space:nowrap;text-shadow:var(--hdr-shadow)}
.brand__slogan{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;line-height:1.6;color:rgba(243,235,221,.72);white-space:nowrap;text-shadow:var(--hdr-shadow)}

.header-utils{display:flex;align-items:center;gap:8px;margin-left:auto}
.util-link{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border:1px solid transparent;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--cream);text-shadow:var(--hdr-shadow);transition:border-color var(--t) var(--ease),color var(--t) var(--ease)}
.util-link:hover,.util-link:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.util-link__ico{display:inline-grid;place-items:center;width:16px;height:16px;border:1px solid currentColor;font-size:10px;line-height:1}

.season{position:relative}
.season__toggle{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;background:transparent;border:1px solid var(--rule-2);cursor:pointer;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--cream);text-shadow:var(--hdr-shadow);transition:border-color var(--t) var(--ease)}
.season__toggle:hover,.season__toggle:focus-visible{border-color:var(--cyan)}
.season__label{color:var(--steel);letter-spacing:.1em}
.season__value{color:var(--amber);font-weight:700;max-width:16ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.season__caret{width:7px;height:7px;border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);transform:rotate(45deg) translate(-1px,-1px)}
.season__panel{position:absolute;top:calc(100% + 8px);right:0;min-width:230px;z-index:130;padding:6px;background:var(--panel);border:2px solid var(--cyan);box-shadow:var(--shadow-hard)}
.season__panel[hidden]{display:none}
.season__opt{display:block;width:100%;text-align:left;padding:9px 10px;background:transparent;border:0;border-left:2px solid transparent;cursor:pointer;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--cream);transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease)}
.season__opt:hover{background:rgba(43,242,208,.1);color:var(--cyan)}
.season__opt[aria-pressed="true"]{color:var(--cyan);border-left-color:var(--cyan)}

.nav-toggle{display:none;align-items:center;gap:8px;margin-left:auto;padding:8px 10px;background:transparent;border:1px solid var(--rule-2);color:var(--cream);cursor:pointer;text-shadow:var(--hdr-shadow);transition:border-color var(--t) var(--ease)}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:2px;background:var(--cyan)}
.nav-toggle__bars i:nth-child(2){width:70%}
.nav-toggle__txt{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em}

/* ---------- 竖向数据标签轨 ---------- */
.site-nav{
  position:fixed;top:var(--bar-h);right:0;bottom:0;width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:16px 0 14px;
  background:rgba(11,33,28,.42);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-left:1px solid var(--rule);
  overflow:visible;z-index:110;
  transition:background-color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-header[data-scrolled="true"] .site-nav{background:var(--panel);border-left-color:var(--rule-2)}
.site-nav__cap{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--steel);text-align:center;line-height:1.4}
.site-nav__list{display:flex;flex-direction:column;gap:4px;width:100%}
.site-nav__item{width:100%}
.site-nav__link{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  width:100%;padding:9px 0;
  border-left:2px solid transparent;
  color:var(--cream);
  transition:transform var(--t) var(--ease),color var(--t) var(--ease),background-color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-nav__num{font-family:var(--font-mono);font-size:10.5px;font-weight:700;letter-spacing:.1em;color:var(--steel);transition:color var(--t) var(--ease)}
.site-nav__txt{writing-mode:vertical-rl;text-orientation:upright;font-size:14px;letter-spacing:.14em;line-height:1;text-shadow:var(--hdr-shadow)}
.site-nav__link:hover,.site-nav__link:focus-visible{transform:translate(-4px,-4px);color:var(--cyan);border-left-color:var(--cyan);background:rgba(43,242,208,.08)}
.site-nav__link:hover .site-nav__num{color:var(--cyan)}
.site-nav__link[aria-current="page"]{color:var(--cyan);border-left-color:var(--cyan);background:rgba(43,242,208,.08)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--cyan)}
.site-nav__foot{display:flex;flex-direction:column;align-items:center;gap:4px;margin-top:auto;padding-top:10px;width:100%;border-top:1px solid var(--rule)}
.site-nav__foot-line{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--steel);text-align:center}
.site-nav__foot-meta{font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--cyan)}
.site-nav__cta{display:none}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:88px;background:var(--panel);color:var(--cream);border-top:2px solid var(--brown)}
.footer__inner{padding:56px 0 22px}
.footer__top{display:grid;grid-template-columns:1.15fr 2fr 1.5fr;gap:36px;padding-bottom:36px;border-bottom:1px solid var(--rule)}
.footer__name{font-family:var(--font-display);font-size:24px;font-weight:400;letter-spacing:.02em;line-height:1.3}
.footer__slogan{margin-top:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--cyan)}
.footer__note{margin-top:14px;font-size:13.5px;line-height:1.75;color:rgba(243,235,221,.66);max-width:32ch}
.footer__cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.footer__col-title{font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--steel);margin-bottom:14px}
.footer__links li+li{margin-top:9px}
.footer__links a{font-size:14.5px;color:var(--cream);border-bottom:1px solid transparent;transition:color var(--t) var(--ease),border-color var(--t) var(--ease)}
.footer__links a:hover,.footer__links a:focus-visible{color:var(--cyan);border-color:var(--cyan)}
.footer__contact{font-style:normal;display:flex;flex-direction:column;gap:12px}
.footer__contact-item{display:flex;flex-direction:column;gap:3px;padding-left:12px;border-left:2px solid var(--amber)}
.footer__contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--steel)}
.footer__contact-val{font-size:14px;color:var(--cream);word-break:break-word;line-height:1.6}
.footer__legal{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;padding-top:18px}
.footer__legal-line{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(243,235,221,.72)}
.footer__lang{margin-left:auto;font-family:var(--font-mono);font-size:12px;color:var(--steel)}

/* ---------- 桌面：右侧轨道 + 内容避让 ---------- */
@media (min-width:1024px){
  body{padding-right:var(--rail-w)}
  .site-header{right:var(--rail-w)}
}

/* ---------- 平板与手机 ---------- */
@media (max-width:1023px){
  .site-nav{
    top:0;left:0;right:auto;bottom:0;width:min(310px,86vw);
    align-items:stretch;gap:0;
    padding:calc(var(--bar-h) + 16px) 20px 24px;
    background:var(--panel);
    border-left:0;border-right:2px solid var(--cyan);
    box-shadow:14px 0 34px rgba(0,0,0,.55);
    transform:translateX(-101%);
    transition:transform 180ms var(--ease);
    overflow-y:auto;z-index:140;
  }
  .site-nav[data-open]{transform:translateX(0)}
  .site-nav__cap{text-align:left;margin-bottom:14px}
  .site-nav__list{gap:0}
  .site-nav__link{flex-direction:row;align-items:baseline;gap:14px;padding:15px 6px;border-left:0;border-bottom:1px solid var(--rule);text-shadow:none}
  .site-nav__link:hover,.site-nav__link:focus-visible{transform:translateX(4px);border-left-color:transparent;border-bottom-color:var(--cyan)}
  .site-nav__link[aria-current="page"]{border-left-color:transparent;border-bottom-color:var(--cyan)}
  .site-nav__txt{writing-mode:horizontal-tb;text-orientation:mixed;font-size:16px;letter-spacing:.06em}
  .site-nav__foot{align-items:flex-start;padding-top:18px;gap:6px}
  .site-nav__foot-line{text-align:left}
  .site-nav__cta{display:inline-flex;align-items:center;margin-top:12px;padding:11px 16px;border:2px solid var(--amber);color:var(--amber);font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;transition:background-color var(--t) var(--ease),color var(--t) var(--ease)}
  .site-nav__cta:hover,.site-nav__cta:focus-visible{background:var(--amber);color:var(--brown)}
  .nav-toggle{display:inline-flex}
  .brand__slogan{display:none}
  body.is-nav-open{overflow:hidden}
  .site-header[data-scrolled="true"] .site-header__bar{border-bottom-color:var(--rule-2)}
}
@media (max-width:1200px){
  .footer__top{grid-template-columns:1fr 1fr;gap:30px}
  .footer__contact{grid-column:1 / -1;flex-direction:row;flex-wrap:wrap;gap:18px 32px}
}
@media (max-width:900px){
  .grid{gap:20px}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:1 / -1}
  .sec{padding:48px 0}
}
@media (max-width:720px){
  body{font-size:16.5px;line-height:1.78}
  .shell{width:min(1240px,100% - 28px)}
  .util-link{display:none}
  .season__label{display:none}
  .site-header__bar{gap:12px;padding:0 14px}
  .brand__name{font-size:17px}
  .footer__top{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:1fr;gap:22px}
  .footer__contact{flex-direction:column}
  .footer__lang{margin-left:0}
  .panel{padding:20px}
  .footer__inner{padding:40px 0 20px}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-property:color,background-color,border-color,outline-color,opacity !important;
    transition-duration:120ms !important;
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
  }
  .site-nav__link:hover,.site-nav__link:focus-visible{transform:none !important}
  .btn:hover,.btn:focus-visible{transform:none !important;box-shadow:none !important}
  .bar-progress{transition:none !important}
}

/* ---------- 高窄视口下的轨道压缩 ---------- */
@media (min-width:1024px) and (max-height:700px){
  .site-nav{padding:8px 0 8px;gap:4px}
  .site-nav__link{padding:5px 0;gap:3px}
  .site-nav__txt{font-size:12.5px;letter-spacing:.1em}
  .site-nav__cap,.site-nav__foot-line{display:none}
}