:root{
  --ink:#0A1F1A;
  --char:#14171A;
  --moss:#1B2E28;
  --lime:#C7F24A;
  --orange:#FF6A2B;
  --gold:#D8B678;
  --wine:#5E2334;
  --indigo:#22375E;
  --paper:#F1F4EE;
  --mute:#8FA39B;
  --hair:rgba(241,244,238,.14);
  --hair-soft:rgba(241,244,238,.08);
  --container:1240px;
  --gutter:20px;
  --radius:2px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-narrow:"Archivo Narrow","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Inter","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --space-section:clamp(72px,10vw,128px);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,picture,video{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
button,input,select,textarea{font:inherit;color:inherit;}
table{border-collapse:collapse;width:100%;}
a{color:var(--lime);text-decoration:none;}
a:hover{text-decoration:underline;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;}
::selection{background:var(--lime);color:var(--ink);}

h1,h2,h3{font-family:var(--font-serif);font-weight:800;letter-spacing:-.01em;line-height:1.22;}
h1{font-size:clamp(30px,4.4vw,56px);}
h2{font-size:clamp(26px,3.4vw,42px);}
h3{font-size:clamp(20px,2.2vw,28px);}
h4,h5,h6{font-family:var(--font-narrow);font-weight:800;letter-spacing:.01em;line-height:1.35;}

/* ---------- 基础工具 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter);}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:500;letter-spacing:-.01em;}
.label{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);}
.prose{max-width:68ch;font-size:17px;line-height:1.75;}
.grid{display:grid;gap:24px;}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.tick-rule{
  height:16px;
  border-top:1px solid var(--hair);
  background-image:repeating-linear-gradient(90deg,var(--mute) 0 1px,transparent 1px 26px);
  background-size:100% 6px;
  background-repeat:repeat-x;
  background-position:left bottom;
  opacity:.65;
}
.band{background:var(--moss);}
.band--wine{background:var(--wine);}
.band--indigo{background:var(--indigo);}
.band--lime{background:var(--lime);color:var(--ink);}
.band--lime .label,.band--lime .num{color:var(--ink);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid transparent;border-radius:var(--radius);
  font-size:15px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  cursor:pointer;text-decoration:none;
  transition:background-color .12s ease,color .12s ease,border-color .12s ease,transform .12s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn--primary{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn--primary:hover{background:#d6ff5f;border-color:#d6ff5f;}
.btn--ghost{background:transparent;color:var(--paper);border-color:rgba(241,244,238,.32);}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn--gold{background:transparent;color:var(--gold);border-color:var(--gold);}
.btn--gold:hover{background:var(--gold);color:var(--char);}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  background:var(--char);
  border:1px solid var(--hair);
  border-radius:var(--radius);
  padding:22px;
}
.card--paper{
  background:linear-gradient(180deg,#161C1B 0%,var(--char) 100%);
  box-shadow:0 1px 0 rgba(241,244,238,.05),0 24px 48px -34px rgba(0,0,0,.95);
}
.card--offset{transform:translateY(-16px);}
.card__label{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);margin-bottom:10px;}
.card__title{font-family:var(--font-narrow);font-weight:800;font-size:19px;line-height:1.35;color:var(--paper);}
.card__meta{margin-top:10px;font-size:13px;color:var(--mute);}
.tag{
  display:inline-block;padding:4px 9px;border:1px solid var(--hair);
  border-radius:var(--radius);font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--mute);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;color:var(--mute);}
.breadcrumb li + li::before{content:"/";color:rgba(143,163,155,.55);}
.breadcrumb a{color:var(--mute);}
.breadcrumb a:hover{color:var(--lime);text-decoration:none;}
.breadcrumb [aria-current="page"]{color:var(--paper);}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:16/9;overflow:hidden;
  background-color:var(--char);
  background-image:linear-gradient(135deg,var(--moss) 0%,var(--char) 58%,var(--ink) 100%);
  border:1px solid var(--hair);
  border-radius:var(--radius);
}
.media-frame::after{
  content:"";position:absolute;inset:8px;
  border:1px solid rgba(199,242,74,.2);
  pointer-events:none;
}
.media-frame > img{width:100%;height:100%;object-fit:cover;object-position:center;}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--tall{aspect-ratio:4/5;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame__caption{
  display:block;margin-top:10px;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-72px;z-index:200;
  padding:10px 16px;border-radius:var(--radius);
  background:var(--lime);color:var(--ink);
  font-size:14px;font-weight:700;text-decoration:none;
  transition:top .16s ease;
}
.skip-link:focus{top:16px;text-decoration:none;}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(10,31,26,.98) 0%,rgba(10,31,26,.92) 100%);
  border-bottom:1px solid var(--hair);
  color:var(--paper);
}
.header-progress{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(241,244,238,.08);}
.header-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--lime) 0%,var(--orange) 100%);transition:width .12s linear;}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 var(--gutter);
  min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  transition:min-height .18s ease;
}
.site-header[data-scrolled="true"] .header-inner{min-height:58px;}

.brand{display:inline-flex;align-items:center;gap:12px;color:var(--paper);text-decoration:none;flex:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  position:relative;width:36px;height:36px;flex:none;
  display:grid;place-items:center;
  border:1px solid var(--lime);border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(199,242,74,.16),rgba(199,242,74,0) 62%);
  font-family:var(--font-serif);font-size:17px;font-weight:800;color:var(--lime);
}
.brand-mark::after{content:"";position:absolute;inset:3px;border:1px solid rgba(199,242,74,.3);}
.brand-word{font-family:var(--font-serif);font-size:20px;font-weight:800;letter-spacing:.02em;}
.season-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--hair);border-left:2px solid var(--lime);
  border-radius:var(--radius);background:rgba(20,23,26,.6);
}
.season-badge__key{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--mute);}
.season-badge__val{font-size:13px;color:var(--lime);}

.primary-nav{display:flex;align-items:center;gap:20px;}
.nav-list{display:flex;align-items:center;gap:2px;}
.nav-item{position:relative;}
.nav-link{
  display:inline-block;padding:9px 12px;border-bottom:2px solid transparent;
  font-size:14px;line-height:1.3;color:var(--paper);
  transition:color .12s ease,border-color .12s ease,background-color .12s ease;
}
.nav-link:hover{color:var(--lime);text-decoration:none;background:rgba(199,242,74,.06);}
.nav-link[aria-current="page"]{color:var(--lime);border-bottom-color:var(--lime);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  padding:10px 16px;border:1px solid var(--lime);border-radius:var(--radius);
  background:rgba(199,242,74,.07);
  font-size:14px;font-weight:600;color:var(--lime);
  transition:background-color .12s ease,color .12s ease;
}
.nav-cta:hover{background:var(--lime);color:var(--ink);text-decoration:none;}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--hair);border-radius:var(--radius);
  background:transparent;color:var(--paper);
  font-size:13px;letter-spacing:.08em;cursor:pointer;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.nav-toggle__bars span{display:block;height:2px;background:var(--lime);transition:transform .16s ease;}
.nav-toggle__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;}
.site-header[data-open="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg);}
.site-header[data-open="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg);}

.chapter-ribbon{
  max-width:var(--container);margin:0 auto;padding:0 var(--gutter);
  height:0;overflow:hidden;opacity:0;
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mute);
  transition:height .18s ease,opacity .18s ease;
}
.site-header[data-scrolled="true"] .chapter-ribbon{height:26px;opacity:1;}
.chapter-ribbon__value{color:var(--lime);}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:var(--space-section);
  background:linear-gradient(180deg,#111514 0%,var(--char) 100%);
  border-top:1px solid var(--hair);
  color:var(--paper);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:4px;
  background:linear-gradient(90deg,
    var(--lime) 0 22%,
    var(--orange) 22% 46%,
    var(--gold) 46% 68%,
    var(--indigo) 68% 86%,
    var(--wine) 86% 100%);
}
.footer-inner{max-width:var(--container);margin:0 auto;padding:60px var(--gutter) 30px;}
.footer-brand{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px;
  padding-bottom:22px;border-bottom:1px solid var(--hair);
}
.footer-brand__word{font-family:var(--font-serif);font-size:26px;font-weight:800;letter-spacing:.02em;}
.footer-brand__note{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:34px 28px;padding:36px 0 32px;}
.footer-col{min-width:0;}
.footer-col-title{
  margin:0 0 14px;font-family:var(--font-narrow);font-size:12px;font-weight:800;
  letter-spacing:.16em;text-transform:uppercase;color:var(--gold);
}
.footer-list{display:grid;gap:10px;}
.footer-item{display:block;}
.footer-link{
  display:inline-block;font-size:14px;line-height:1.5;color:var(--paper);
  border-bottom:1px solid transparent;opacity:.82;
  transition:color .12s ease,border-color .12s ease,opacity .12s ease;
}
.footer-link:hover,.footer-link:focus-visible{opacity:1;color:var(--lime);border-bottom-color:var(--lime);text-decoration:none;}
.footer-contact{display:block;font-size:14px;line-height:1.6;color:var(--paper);opacity:.82;}
.footer-contact .num{color:var(--paper);opacity:1;}
.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-top:20px;border-top:1px solid var(--hair);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mute);
}
.footer-meta__legal{color:var(--mute);}
.footer-sign{color:var(--gold);}

/* ---------- 入场动效 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.has-js [data-reveal="shown"]{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-list{gap:0;}
  .nav-link{padding:9px 9px;font-size:13px;}
  .primary-nav{gap:12px;}
}
@media (max-width:1040px){
  .nav-toggle{display:inline-flex;}
  .primary-nav{
    position:fixed;inset:0 0 0 auto;width:min(88vw,360px);
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:92px 24px 32px;overflow-y:auto;
    background:var(--moss);border-left:1px solid var(--hair);
    transform:translateX(100%);
    transition:transform .24s ease;
    z-index:90;
  }
  .site-header[data-open="true"] .primary-nav{transform:translateX(0);}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link{
    display:block;padding:15px 4px;font-size:16px;
    border-bottom:1px solid var(--hair-soft);border-left:0;
  }
  .nav-link[aria-current="page"]{border-bottom-color:var(--hair-soft);}
  .nav-cta{margin-top:24px;justify-content:center;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 24px;}
}
@media (max-width:860px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .card--offset{transform:none;}
}
@media (max-width:680px){
  body{font-size:16px;}
  .brand-word{font-size:18px;}
  .season-badge{display:none;}
  .header-inner{min-height:64px;gap:12px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding:28px 0 24px;}
  .footer-brand__word{font-size:22px;}
  .footer-meta{flex-direction:column;align-items:flex-start;}
  .grid--12{grid-template-columns:1fr;}
}
@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;}
  .btn:hover{transform:none;}
}