:root{
  --ink-deep:#071C16;
  --ink-deep-2:#0B2A21;
  --concrete:#2B302E;
  --concrete-2:#3A403D;
  --paper:#F5F7F2;
  --lime:#C6FF2E;
  --lime-soft:#E9FFB0;
  --orange:#FF9A3D;
  --text-ink:#10211B;
  --concrete-light:#D7D9D4;
  --glass:#A8B5AE;
  --line-deep:#1F332B;
  --hair:rgba(215,217,212,.20);
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --shell-max:1320px;
  --edge:clamp(16px,3vw,40px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:140px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--ink-deep);color:var(--paper);font-family:var(--font-body);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font-display);line-height:1.1;letter-spacing:.01em;font-weight:700}
p{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
::selection{background:var(--lime);color:#08170F}
body.is-nav-locked{overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:8px;left:8px;z-index:200;padding:10px 16px;background:var(--lime);color:#08170F;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;transform:translateY(-180%);transition:transform .2s ease}
.skip-link:focus,.skip-link:focus-visible{transform:none}

/* ============ 页头：看台检票框架 ============ */
.site-gate{position:sticky;top:0;z-index:80;background:rgba(7,28,22,.94);border-top:2px solid var(--lime);border-bottom:1px solid var(--line-deep);color:var(--paper);-webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%)}
.gate-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 20px;padding:7px var(--edge);border-bottom:1px solid var(--line-deep);font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:rgba(215,217,212,.72)}
.gate-top__hint{display:flex;align-items:center;gap:9px;color:var(--lime-soft)}
.gate-top__dot{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 10px rgba(198,255,46,.8)}
@media (prefers-reduced-motion:no-preference){.gate-top__dot{animation:gate-pulse 3.2s ease-out infinite}}
@keyframes gate-pulse{0%{box-shadow:0 0 0 0 rgba(198,255,46,.55)}70%{box-shadow:0 0 0 9px rgba(198,255,46,0)}100%{box-shadow:0 0 0 0 rgba(198,255,46,0)}}
.gate-main{display:flex;align-items:center;gap:clamp(14px,2.6vw,36px);max-width:1600px;margin-inline:auto;padding:11px var(--edge)}
.gate-brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.gate-brand__mark{display:grid;place-items:center;width:46px;height:46px;background:var(--lime);color:#08170F;font-family:var(--font-display);font-size:17px;font-weight:700;line-height:1.05;letter-spacing:.04em;writing-mode:vertical-rl;text-orientation:upright;overflow:hidden}
.gate-brand__text{display:flex;flex-direction:column;gap:1px}
.gate-brand__name{font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:.06em;color:var(--paper);line-height:1.2}
.gate-brand__slogan{font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;color:var(--lime);line-height:1.4}
.gate-toggle{display:none;align-items:center;gap:10px;padding:10px 14px;background:transparent;border:1px solid var(--line-deep);color:var(--paper);font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;cursor:pointer;position:relative;z-index:95}
.gate-toggle:hover{border-color:rgba(198,255,46,.6);color:var(--lime)}
.gate-toggle__bars{display:grid;gap:4px}
.gate-toggle__bars i{display:block;width:18px;height:2px;background:var(--lime);transition:transform .2s ease,opacity .2s ease}
.gate-nav{display:flex;align-items:center;gap:clamp(4px,1.2vw,18px);margin-left:auto}
.gate-nav__list{display:flex;align-items:stretch}
.gate-nav__item{display:flex}
.gate-nav__link{position:relative;display:flex;flex-direction:column;gap:2px;padding:7px clamp(8px,1.1vw,15px);border-left:1px solid var(--line-deep);transition:background .16s ease,transform .16s ease}
.gate-nav__item:last-child .gate-nav__link{border-right:1px solid var(--line-deep)}
.gate-nav__num{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--concrete-light);line-height:1.4}
.gate-nav__label{font-family:var(--font-display);font-size:16px;font-weight:600;letter-spacing:.04em;color:var(--paper);white-space:nowrap;line-height:1.3;transition:color .16s ease}
.gate-nav__link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.gate-nav__link:hover{background:rgba(198,255,46,.09);transform:translateY(-3px)}
.gate-nav__link:hover .gate-nav__label{color:var(--lime)}
.gate-nav__link:hover::after{transform:scaleX(1)}
.gate-nav__link[aria-current="page"]{background:rgba(198,255,46,.12)}
.gate-nav__link[aria-current="page"] .gate-nav__num{color:var(--lime)}
.gate-nav__link[aria-current="page"] .gate-nav__label{color:var(--lime-soft)}
.gate-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.gate-nav__foot{display:none}
.gate-progress{height:2px;background:rgba(198,255,46,.13)}
.gate-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--lime),var(--lime-soft));transition:width .12s linear}

@media (max-width:1199px){
  .gate-brand__slogan{display:none}
  .gate-nav__link{padding:7px 9px}
  .gate-nav__label{font-size:14px}
}
@media (max-width:1023px){
  .gate-toggle{display:inline-flex;margin-left:auto}
  .gate-nav{position:fixed;top:0;left:0;bottom:0;width:min(86vw,344px);margin:0;padding:clamp(76px,13vh,116px) 22px 28px;display:flex;flex-direction:column;align-items:stretch;gap:0;background:rgba(7,28,22,.98);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-right:1px solid rgba(198,255,46,.4);box-shadow:26px 0 60px rgba(0,0,0,.45);transform:translateX(-102%);opacity:0;visibility:hidden;overflow-y:auto;z-index:90;transition:transform .26s ease,opacity .26s ease,visibility .26s}
  .gate-nav__list{flex-direction:column}
  .gate-nav__link{flex-direction:row;align-items:baseline;gap:14px;padding:15px 6px;border-left:0;border-bottom:1px solid var(--line-deep)}
  .gate-nav__item:last-child .gate-nav__link{border-right:0;border-bottom:0}
  .gate-nav__num{font-size:12px}
  .gate-nav__label{font-size:21px}
  .gate-nav__link:hover{transform:none}
  .gate-nav__foot{display:block;padding:20px 6px 0;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:rgba(215,217,212,.62)}
  .site-gate[data-open="true"] .gate-nav{transform:none;opacity:1;visibility:visible}
  .site-gate[data-open="true"]::after{content:"";position:fixed;inset:0;background:rgba(3,12,9,.66);z-index:85}
  .site-gate[data-open="true"] .gate-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-gate[data-open="true"] .gate-toggle__bars i:nth-child(2){opacity:0}
  .site-gate[data-open="true"] .gate-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
}
@media (max-width:640px){
  .gate-top__meta{display:none}
  .gate-brand__mark{width:40px;height:40px;font-size:15px}
  .gate-brand__name{font-size:17px}
}

/* ============ 页脚：看台背面 ============ */
.site-foot{position:relative;margin-top:clamp(48px,7vw,110px);background:var(--concrete);color:var(--paper);border-top:1px solid var(--line-deep)}
.foot-band{height:8px;background:repeating-linear-gradient(135deg,var(--lime) 0 18px,var(--ink-deep) 18px 36px)}
.foot-inner{max-width:var(--shell-max);margin-inline:auto;padding:clamp(38px,5.5vw,76px) var(--edge) clamp(22px,3.5vw,38px)}
.foot-lead{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px 40px;padding-bottom:clamp(26px,4vw,46px);border-bottom:1px solid var(--hair)}
.foot-kicker{margin-bottom:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--lime)}
.foot-brand{font-family:var(--font-display);font-size:clamp(30px,5vw,56px);font-weight:700;line-height:1;letter-spacing:.04em}
.foot-statement{max-width:44ch;margin-top:12px;font-size:15px;line-height:1.75;color:rgba(215,217,212,.82)}
.foot-watermark{margin:0;font-family:var(--font-mono);font-size:clamp(26px,5.5vw,64px);line-height:.9;letter-spacing:.06em;color:rgba(198,255,46,.14);-webkit-text-stroke:1px rgba(198,255,46,.45);user-select:none}
.foot-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(22px,3.6vw,52px);padding-block:clamp(26px,3.6vw,46px)}
.foot-block__title{margin-bottom:16px;padding-left:11px;border-left:3px solid var(--lime);font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--lime-soft);line-height:1.4}
.foot-contact{display:grid;gap:14px}
.foot-contact__row{display:grid;grid-template-columns:40px minmax(0,1fr) auto;align-items:start;gap:10px;font-size:14px;line-height:1.6}
.foot-contact__key{padding-top:3px;font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--orange)}
.foot-contact__value{color:var(--paper);word-break:break-word}
.foot-copy{justify-self:start;padding:3px 9px;background:transparent;border:1px solid var(--line-deep);color:var(--concrete-light);font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;cursor:pointer;transition:color .16s ease,border-color .16s ease,background .16s ease}
.foot-copy:hover,.foot-copy:focus-visible{border-color:var(--lime);color:var(--lime)}
.foot-copy[data-copied="true"]{background:var(--lime);border-color:var(--lime);color:#08170F}
.foot-links{display:grid;gap:9px}
.foot-link{display:inline-block;font-size:15px;color:rgba(245,247,242,.86);border-bottom:1px solid transparent;transition:color .16s ease,border-color .16s ease,transform .16s ease}
.foot-link:hover,.foot-link:focus-visible{color:var(--lime);border-color:rgba(198,255,46,.5);transform:translateX(3px)}
.foot-note{margin-top:16px;padding-top:14px;border-top:1px solid var(--hair);font-size:13px;line-height:1.7;color:rgba(215,217,212,.7)}
.foot-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;padding-top:18px;border-top:1px solid var(--hair);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:rgba(215,217,212,.62)}
@media (max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.foot-grid{grid-template-columns:1fr}.foot-lead{padding-bottom:24px}}

/* ============ 内容容器与色带 ============ */
.container{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--edge)}
.section{padding-block:clamp(44px,6vw,94px)}
.section--tight{padding-block:clamp(24px,4vw,48px)}
.band--ink{background:var(--ink-deep);color:var(--paper)}
.band--concrete{background:var(--concrete);color:var(--paper)}
.band--paper{background:var(--paper);color:var(--text-ink);--hair:rgba(16,33,27,.16)}
.band--lime{background:var(--lime);color:#08170F;--hair:rgba(8,23,15,.22)}
.stack{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--stair{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start}
.grid--stair > *:nth-child(2){margin-top:clamp(14px,2.6vw,40px)}
.grid--stair > *:nth-child(3){margin-top:clamp(28px,5.2vw,80px)}
@media (max-width:900px){.grid--2,.grid--3,.grid--stair{grid-template-columns:1fr}.grid--stair > *{margin-top:0!important}}
.divider{height:1px;border:0;margin-block:clamp(24px,4vw,48px);background:var(--hair)}

/* ============ 章节 ============ */
.chapter{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(14px,2.8vw,34px);align-items:start;margin-bottom:clamp(20px,3vw,36px)}
.chapter__num{font-family:var(--font-mono);font-size:clamp(34px,5.2vw,70px);font-weight:500;line-height:.8;letter-spacing:-.03em;color:var(--lime)}
.chapter__body{display:grid;gap:8px;padding-top:4px;min-width:0}
.chapter__title{font-family:var(--font-display);font-size:clamp(25px,3.3vw,42px);font-weight:700;line-height:1.14}
.chapter__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--orange)}
.band--paper .chapter__num,.band--lime .chapter__num{color:var(--concrete)}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--lime)}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
.band--paper .eyebrow{color:#2F6B4F}

/* ============ 文本 ============ */
.lede{max-width:56ch;font-size:clamp(17px,1.6vw,20px);line-height:1.75}
.prose{max-width:68ch;font-size:16px;line-height:1.85}
.prose > * + *{margin-top:1em}
.prose h2{font-size:clamp(22px,2.4vw,32px);margin-top:1.6em}
.prose h3{font-size:clamp(19px,2vw,24px);margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--lime)}
.prose strong{font-weight:700}
.prose code{font-family:var(--font-mono);font-size:.92em;padding:.1em .4em;background:rgba(168,181,174,.22)}
.band--paper .prose a{text-decoration-color:#2F6B4F}

/* ============ 按钮与标签 ============ */
.btn{display:inline-flex;align-items:center;gap:.6em;padding:13px 24px;border:1px solid transparent;font-family:var(--font-display);font-size:16px;font-weight:700;letter-spacing:.06em;line-height:1.2;cursor:pointer;transition:transform .16s ease,background .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease}
.btn--lime{background:var(--lime);border-color:var(--lime);color:#08170F}
.btn--lime:hover,.btn--lime:focus-visible{transform:translateY(-4px);box-shadow:0 12px 0 -6px rgba(198,255,46,.35)}
.btn--ghost{background:transparent;border-color:rgba(215,217,212,.5);color:var(--paper)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--lime);color:var(--lime);transform:translateY(-3px)}
.btn--orange{background:transparent;border-color:rgba(255,154,61,.7);color:var(--orange)}
.btn--orange:hover,.btn--orange:focus-visible{background:rgba(255,154,61,.12);transform:translateY(-3px)}
.band--paper .btn--ghost{border-color:rgba(16,33,27,.35);color:var(--text-ink)}
.band--paper .btn--ghost:hover{border-color:#2F6B4F;color:#2F6B4F}
.tag{display:inline-flex;align-items:center;gap:.4em;padding:3px 10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;line-height:1.6;border:1px solid var(--hair);color:var(--concrete-light)}
.tag--lime{background:rgba(198,255,46,.14);border-color:rgba(198,255,46,.5);color:var(--lime-soft)}
.tag--orange{border-color:rgba(255,154,61,.55);color:var(--orange)}
.tag--ghost{background:transparent}
.band--paper .tag{color:#3E4C44}
.band--paper .tag--lime{background:rgba(47,107,79,.12);border-color:rgba(47,107,79,.4);color:#1D5B3F}

/* ============ 层：实色 / 玻璃 / 卡片 ============ */
.panel{background:var(--paper);color:var(--text-ink);padding:clamp(20px,3vw,36px);--hair:rgba(16,33,27,.16)}
.glass{background:rgba(168,181,174,.13);border:1px solid rgba(215,217,212,.24);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:clamp(18px,2.6vw,30px)}
.card{position:relative;padding:clamp(18px,2.6vw,30px);border:1px solid var(--hair);background:rgba(168,181,174,.08);transition:transform .16s ease,border-color .16s ease,background .16s ease}
.card:hover,.card:focus-within{transform:translateY(-4px);border-color:rgba(198,255,46,.55);background:rgba(198,255,46,.07)}
.card__title{margin-bottom:8px;font-family:var(--font-display);font-size:clamp(19px,2vw,24px)}

/* ============ 数据 ============ */
.data-table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.data-table th,.data-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--hair)}
.data-table th{font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--orange)}
.data-table td{font-family:var(--font-mono);font-size:14px}
.data-table tbody tr:hover{background:rgba(198,255,46,.08)}
.band--paper .data-table tbody tr:hover{background:rgba(16,33,27,.05)}
.stat{display:grid;gap:3px}
.stat__value{font-family:var(--font-mono);font-size:clamp(22px,2.6vw,32px);line-height:1.1;letter-spacing:-.02em;color:var(--lime)}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--concrete-light)}
.band--paper .stat__value{color:#1D5B3F}
.band--paper .stat__label{color:#57655D}
.meta-line{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--orange)}
.meta-line__dot{width:6px;height:6px;border-radius:50%;background:var(--orange);flex:0 0 auto}

/* ============ 图片容器基础规则 ============ */
.figure{display:grid;gap:10px;margin:0}
.figure__media{position:relative;overflow:hidden;aspect-ratio:16/10;border:1px solid var(--hair);background:linear-gradient(145deg,var(--concrete) 0%,var(--ink-deep-2) 55%,#0E3A2C 100%)}
.figure__media::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:linear-gradient(90deg,var(--lime),rgba(198,255,46,0))}
.figure__img{width:100%;height:100%;object-fit:cover;object-position:center}
.figure__caption{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--concrete-light)}
.band--paper .figure__caption,.panel .figure__caption{color:#4C5A52}
.figure--wide .figure__media{aspect-ratio:21/9}
.figure--tall .figure__media{aspect-ratio:4/5}
@media (max-width:600px){.figure--wide .figure__media{aspect-ratio:16/10}}

/* ============ 面包屑 ============ */
.breadcrumb{margin-bottom:clamp(18px,2.6vw,30px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:rgba(215,217,212,.6)}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(198,255,46,.55)}
.breadcrumb__link{color:rgba(215,217,212,.85);border-bottom:1px solid transparent;transition:color .16s ease,border-color .16s ease}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--lime);border-color:rgba(198,255,46,.5)}
.breadcrumb__item[aria-current="page"]{color:var(--lime-soft)}
.band--paper .breadcrumb__list{color:#5B6961}
.band--paper .breadcrumb__link{color:#1D5B3F}

/* ============ 返回顶部 ============ */
.to-top{position:fixed;right:clamp(12px,3vw,28px);bottom:clamp(12px,3vw,28px);z-index:70;display:inline-flex;align-items:center;gap:8px;padding:10px 16px;background:rgba(7,28,22,.92);border:1px solid rgba(198,255,46,.55);color:var(--lime);font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .2s ease,transform .2s ease,visibility .2s,background .16s ease}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover,.to-top:focus-visible{background:rgba(198,255,46,.16)}

/* ============ 显现 ============ */
.has-js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease}
.has-js [data-reveal].is-revealed{opacity:1;transform:none}

/* ============ 无障碍动效降级 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .has-js [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover,.foot-link:hover,.gate-nav__link:hover{transform:none}
}