:root{
  --night:#061826;
  --ink:#03070A;
  --turf:#0B7A3B;
  --turf-deep:#064A28;
  --volt:#D8FF3E;
  --signal:#FF5A36;
  --chalk:#F5F7EE;
  --mist:#C8D6C5;
  --steel:#6F8394;
  --board:#123A5A;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Condensed","Barlow Condensed","Oswald","HarmonyOS Sans SC","PingFang SC",sans-serif;

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --hair:rgba(6,24,38,.18);
  --hair-light:rgba(245,247,238,.16);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:clamp(15px,1.6vw,16.5px);
  font-weight:400;
  line-height:1.75;
  color:var(--night);
  background:var(--chalk);
}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-sans);font-weight:900;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;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%}
strong,b{font-weight:900}
:focus-visible{outline:3px solid var(--volt);outline-offset:2px;box-shadow:0 0 0 3px var(--ink)}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}

/* ---------- 分区与节奏 ---------- */
.band{position:relative;padding:clamp(40px,6vw,84px) 0}
.band>*{position:relative;z-index:1}
.band--chalk{background:var(--chalk);color:var(--night)}
.band--night{background:var(--night);color:var(--chalk)}
.band--turf{background:var(--turf);color:var(--chalk)}
.band--board{background:var(--board);color:var(--chalk)}
.band--net::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(245,247,238,.07) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(245,247,238,.07) 0 1px,transparent 1px 28px);
}
.band--net.band--chalk::before{
  background-image:
    repeating-linear-gradient(0deg,rgba(6,24,38,.08) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(6,24,38,.08) 0 1px,transparent 1px 28px);
}
.rule{height:0;border:0;border-top:1px solid var(--hair);margin:clamp(20px,3vw,34px) 0}
.band--night .rule,.band--turf .rule,.band--board .rule{border-top-color:var(--hair-light)}

/* ---------- 标题组件 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.7rem;font-weight:700;letter-spacing:.3em;color:var(--turf);
}
.kicker::before{content:"";width:24px;height:3px;background:var(--volt)}
.band--night .kicker,.band--turf .kicker,.band--board .kicker{color:var(--volt)}

.section-head{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(12px,2vw,22px);align-items:end;
  padding-bottom:14px;margin-bottom:clamp(20px,3vw,34px);
  border-bottom:2px solid var(--night);
}
.section-head__index{
  font-family:var(--font-num);font-weight:700;font-size:clamp(2.1rem,5vw,3.4rem);
  line-height:.82;color:var(--turf);font-variant-numeric:tabular-nums;
}
.section-head__title{font-size:clamp(1.35rem,3vw,2.05rem);font-weight:900}
.section-head__note{margin-top:6px;font-size:.86rem;font-weight:500;letter-spacing:.02em;color:rgba(6,24,38,.66)}
.band--night .section-head,.band--turf .section-head,.band--board .section-head{border-bottom-color:var(--volt)}
.band--night .section-head__index,.band--turf .section-head__index,.band--board .section-head__index{color:var(--volt)}
.band--night .section-head__note,.band--turf .section-head__note,.band--board .section-head__note{color:var(--mist)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;font-size:.82rem;font-weight:700;letter-spacing:.14em;
  border:1px solid transparent;line-height:1.2;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:active{transform:translateY(1px)}
.btn--volt{background:var(--volt);color:var(--ink)}
.btn--volt:hover{background:var(--chalk);color:var(--ink)}
.btn--turf{background:var(--turf);color:var(--chalk)}
.btn--turf:hover{background:var(--turf-deep)}
.btn--ink{background:var(--ink);color:var(--chalk)}
.btn--ink:hover{background:var(--turf-deep)}
.btn--ghost{border-color:rgba(245,247,238,.35);color:var(--chalk)}
.btn--ghost:hover{border-color:var(--volt);color:var(--volt)}

/* ---------- 标签与数字 ---------- */
.num{font-family:var(--font-num);font-weight:700;font-variant-numeric:tabular-nums;line-height:.9;letter-spacing:.01em}
.tag{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.16em;padding:5px 10px;background:var(--volt);color:var(--ink)}
.tag--signal{background:var(--signal);color:var(--chalk)}
.tag--outline{background:transparent;border:1px solid currentColor;color:inherit}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--board);border:1px solid rgba(6,24,38,.2);
  aspect-ratio:16 / 9;
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05) contrast(1.05)}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__tag{
  position:absolute;top:0;left:0;z-index:2;
  background:var(--volt);color:var(--ink);
  font-size:.66rem;font-weight:700;letter-spacing:.18em;padding:5px 10px;
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:10px 14px;color:var(--chalk);font-size:.76rem;letter-spacing:.06em;
  background:linear-gradient(180deg,rgba(6,24,38,0),rgba(6,24,38,.9));
}

/* ---------- 数据表 ---------- */
.tbl{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.tbl caption{text-align:left;font-size:.76rem;font-weight:700;letter-spacing:.16em;color:var(--steel);padding-bottom:10px}
.tbl th{
  background:var(--turf-deep);color:var(--chalk);
  font-family:var(--font-sans);font-weight:700;font-size:.74rem;letter-spacing:.12em;
  text-align:left;padding:10px 12px;white-space:nowrap;
}
.tbl td{padding:11px 12px;border-bottom:1px solid var(--hair);font-size:.92rem}
.tbl tbody tr:hover{background:rgba(216,255,62,.18)}
.tbl .num{font-size:1.15rem;color:var(--turf-deep)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.76rem;font-weight:700;letter-spacing:.1em;color:var(--steel)}
.breadcrumbs__link{color:inherit}
.breadcrumbs__link:hover{color:var(--turf)}
.breadcrumbs__sep{opacity:.6}
.breadcrumbs__current{color:var(--night)}
.band--night .breadcrumbs,.band--turf .breadcrumbs,.band--board .breadcrumbs{color:var(--mist)}
.band--night .breadcrumbs__current,.band--turf .breadcrumbs__current,.band--board .breadcrumbs__current{color:var(--chalk)}

/* ---------- 长文 ---------- */
.prose{max-width:35em}
.prose p{margin:0 0 1.05em}
.prose h2{font-size:clamp(1.25rem,2.4vw,1.6rem);margin:1.7em 0 .55em}
.prose h3{font-size:clamp(1.05rem,1.9vw,1.22rem);margin:1.4em 0 .45em}
.prose ul,.prose ol{margin:0 0 1.05em}
.prose ul li{position:relative;padding-left:20px;margin-bottom:.45em}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;background:var(--turf)}
.prose ol{counter-reset:prose}
.prose ol li{position:relative;padding-left:24px;margin-bottom:.45em;counter-increment:prose}
.prose ol li::before{
  content:counter(prose);position:absolute;left:0;top:0;
  font-family:var(--font-num);font-weight:700;color:var(--turf);
}
.prose a{border-bottom:2px solid var(--volt)}
.prose strong{color:var(--night)}
.band--night .prose strong{color:var(--volt)}

/* ---------- 章节目录 ---------- */
.toc{font-size:.82rem}
.toc__list{display:grid;gap:2px}
.toc__link{
  display:block;padding:8px 12px;margin-left:-3px;
  font-weight:700;letter-spacing:.1em;color:rgba(6,24,38,.68);
  border-left:3px solid transparent;
}
.toc__link:hover{color:var(--turf)}
.toc__link[aria-current="true"]{color:var(--night);border-left-color:var(--volt);background:rgba(11,122,59,.08)}
.band--night .toc__link{color:var(--mist)}
.band--night .toc__link[aria-current="true"]{color:var(--chalk);background:rgba(216,255,62,.1)}

/* ---------- 显现动效 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
html.js [data-reveal].is-revealed{opacity:1;transform:none}

/* ===================== 头部 ===================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--night);color:var(--chalk);
  border-bottom:1px solid rgba(216,255,62,.22);
}
.skip-link{
  position:absolute;left:50%;top:0;z-index:200;
  transform:translate(-50%,-140%);
  padding:10px 22px;background:var(--volt);color:var(--ink);
  font-weight:700;letter-spacing:.12em;font-size:.82rem;
  transition:transform .18s ease;
}
.skip-link:focus{transform:translate(-50%,0)}

.masthead{background:var(--night);border-bottom:1px solid var(--hair-light);transition:background .2s ease}
.masthead__inner{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:end;gap:16px;
  padding-top:18px;padding-bottom:14px;
}
.masthead__side{display:flex;align-items:center;min-height:1px}
.masthead__side--actions{justify-content:flex-end}
.masthead__links{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.masthead__link{
  font-size:.78rem;font-weight:700;letter-spacing:.14em;color:var(--mist);
  padding-bottom:2px;border-bottom:1px solid transparent;
}
.masthead__link:hover{color:var(--volt);border-bottom-color:var(--volt)}
.masthead__brand{text-align:center;min-width:0}
.masthead__kicker{
  font-size:.66rem;font-weight:700;letter-spacing:.34em;
  color:var(--volt);text-transform:uppercase;
}
.masthead__logo{
  display:inline-block;margin-top:2px;
  font-family:var(--font-serif);font-weight:900;
  font-size:clamp(2rem,4.6vw,3.2rem);line-height:1.04;letter-spacing:-.02em;
  color:var(--chalk);
}
.masthead__logo:hover{color:var(--volt)}
.masthead__tagline{margin-top:6px;font-size:.74rem;font-weight:700;letter-spacing:.28em;color:var(--mist)}
.masthead__cta{padding:11px 18px;font-size:.76rem}

.site-header.is-compact .masthead__inner{padding-top:8px;padding-bottom:8px}
.site-header.is-compact .masthead__logo{font-size:clamp(1.35rem,2.6vw,1.75rem)}
.site-header.is-compact .masthead__tagline,
.site-header.is-compact .masthead__kicker{display:none}

.nav-band{position:relative;background:var(--ink)}
.nav-band__inner{display:flex;align-items:center;gap:12px;min-height:52px}
.site-nav{margin-inline:auto;min-width:0}
.site-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(8px,2.2vw,30px)}
.site-nav__link{
  position:relative;display:inline-block;padding:14px 2px;
  font-size:.84rem;font-weight:700;letter-spacing:.14em;color:var(--mist);
}
.site-nav__link:hover{color:var(--chalk)}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:3px;
  background:var(--volt);transform:scaleX(0);transform-origin:left center;
  transition:transform .25s ease;
}
.site-nav__link:hover::after{transform:scaleX(.42)}
.site-nav__link[aria-current="page"]{color:var(--chalk)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;border:1px solid rgba(245,247,238,.28);
  color:var(--chalk);font-size:.76rem;font-weight:700;letter-spacing:.18em;
}
.nav-toggle:hover{border-color:var(--volt);color:var(--volt)}
.nav-toggle__icon{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bar{display:block;height:2px;width:100%;background:var(--volt);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.score-meter{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(245,247,238,.14)}
.score-meter__fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--turf),var(--volt))}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--night);color:var(--chalk);border-top:4px solid var(--turf)}
.footer-ticker{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  padding:12px var(--gutter);
  background:var(--ink);border-bottom:1px solid rgba(216,255,62,.18);
}
.footer-ticker__dot{width:9px;height:9px;background:var(--signal);border-radius:50%;flex:0 0 auto}
.footer-ticker__text{font-size:.76rem;font-weight:700;letter-spacing:.2em;color:var(--mist)}
.footer-ticker__link{
  margin-left:auto;font-size:.76rem;font-weight:700;letter-spacing:.16em;
  color:var(--volt);border-bottom:2px solid var(--volt);padding-bottom:2px;
}
.footer-ticker__link:hover{color:var(--chalk);border-bottom-color:var(--chalk)}

.footer-main{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(32px,5vw,62px) var(--gutter);
  display:grid;grid-template-columns:1.35fr 2fr 1.15fr;
  gap:clamp(24px,4vw,56px);
}
.footer-brand__kicker{font-size:.66rem;font-weight:700;letter-spacing:.34em;color:var(--volt)}
.footer-brand__logo{
  margin:8px 0 14px;
  font-family:var(--font-serif);font-weight:900;
  font-size:clamp(2rem,4vw,2.6rem);line-height:1.1;color:var(--chalk);
}
.footer-brand__summary{font-size:.9rem;color:var(--mist);max-width:28em}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer-tags__item{
  font-size:.68rem;font-weight:700;letter-spacing:.16em;
  padding:5px 10px;border:1px solid rgba(216,255,62,.38);color:var(--volt);
}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,28px)}
.footer-col__head{
  font-size:.72rem;font-weight:700;letter-spacing:.22em;color:var(--volt);
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--hair-light);
}
.footer-col__list{display:grid;gap:9px}
.footer-col__link{font-size:.88rem;color:var(--mist)}
.footer-col__link:hover{color:var(--volt)}
.footer-contact__list{display:grid;gap:12px}
.footer-contact__item{display:grid;gap:2px;font-size:.85rem;color:var(--chalk);word-break:break-word}
.footer-contact__label{font-size:.66rem;font-weight:700;letter-spacing:.2em;color:var(--steel)}
.footer-contact__note{
  margin-top:14px;padding-left:10px;border-left:3px solid var(--signal);
  font-size:.76rem;line-height:1.6;color:var(--mist);
}
.footer-contact__cta{margin-top:16px;padding:10px 16px;font-size:.74rem}

.footer-base{
  max-width:var(--shell);margin-inline:auto;
  padding:18px var(--gutter) 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
  border-top:1px solid var(--hair-light);
  font-size:.74rem;letter-spacing:.06em;color:var(--steel);
}
.footer-base__copy,.footer-base__legal{margin:0}
.footer-base__links{display:flex;flex-wrap:wrap;gap:16px}
.footer-base__link{color:var(--mist)}
.footer-base__link:hover{color:var(--volt)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border:1px solid rgba(216,255,62,.45);
  font-size:.72rem;font-weight:700;letter-spacing:.18em;color:var(--chalk);
  transition:background .2s ease,color .2s ease;
}
.to-top:hover{background:var(--volt);color:var(--ink)}
.to-top[hidden]{display:none}

/* ===================== 响应式 ===================== */
@media (max-width:1040px){
  .footer-main{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:900px){
  .masthead__inner{grid-template-columns:1fr auto;align-items:center;gap:12px;padding-top:12px;padding-bottom:12px}
  .masthead__side--links{display:none}
  .masthead__brand{text-align:left}
  .masthead__kicker{font-size:.6rem;letter-spacing:.26em}
  .masthead__tagline{font-size:.66rem;letter-spacing:.2em}
  .masthead__cta{padding:9px 12px;font-size:.7rem;letter-spacing:.1em}

  .nav-band__inner{justify-content:space-between;min-height:50px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;z-index:99;
    display:none;margin:0;
    background:var(--night);
    border-top:1px solid rgba(216,255,62,.24);
    border-bottom:1px solid rgba(216,255,62,.24);
    box-shadow:0 18px 40px rgba(3,7,10,.5);
  }
  .site-nav[data-open="true"]{display:block}
  .site-nav__list{flex-direction:column;gap:0;padding:6px var(--gutter) 18px}
  .site-nav__item{border-bottom:1px solid rgba(245,247,238,.1)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{display:block;padding:15px 0;font-size:.94rem;letter-spacing:.1em}
  .site-nav__link::after{left:0;right:auto;bottom:10px;width:28px}

  .grid--halves,.grid--thirds{grid-template-columns:1fr}
  .section-head{grid-template-columns:auto minmax(0,1fr);gap:12px}
}
@media (max-width:680px){
  .footer-main{grid-template-columns:1fr;gap:28px}
  .footer-nav{grid-template-columns:1fr 1fr}
  .footer-ticker__link{margin-left:0}
  .footer-base{flex-direction:column;align-items:flex-start;gap:14px}
  .prose{max-width:none}
}
@media (max-width:420px){
  .footer-nav{grid-template-columns:1fr}
  .masthead__logo{font-size:clamp(1.7rem,8vw,2.1rem)}
}

@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}
  .score-meter__fill{transition:none}
}