/* ===== 0. 设计令牌 ===== */
:root{
  --ink:#16342A;
  --ink-2:#244A3B;
  --apricot:#E8963C;
  --apricot-deep:#C9772A;
  --apricot-soft:#F7D9A0;
  --cinnabar:#C2402E;
  --rice:#FDF6E9;
  --wood:#7A5230;
  --charcoal:#14100C;
  --bamboo:#4C7A5E;
  --taupe:#6B6257;

  --font-display:"Songti SC","Source Han Serif SC","Noto Serif SC","STSong",Georgia,"Times New Roman",serif;
  --font-body:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --bw:3px;
  --shadow-hard:6px 6px 0 var(--charcoal);
  --shadow-soft:0 16px 40px rgba(20,16,12,.16);
  --r-sm:10px; --r:18px; --r-lg:28px; --r-pill:999px;
  --shell:1280px;
  --gutter:clamp(16px,3.4vw,44px);
  --section-y:clamp(48px,7vw,104px);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ===== 1. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--rice);color:var(--charcoal);font-family:var(--font-body);font-size:17px;line-height:1.88;font-weight:400;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--font-display);font-weight:700;line-height:1.26;letter-spacing:.012em}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
strong{font-weight:700}
:focus-visible{outline:3px solid var(--apricot);outline-offset:3px;border-radius:6px}

/* ===== 2. 通用版式 ===== */
.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}
.container{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.shell-offset{padding-top:clamp(104px,12vw,148px)}
#main-content{scroll-margin-top:120px}
#main-content:focus{outline:none}
.section{position:relative;padding:var(--section-y) 0}
.section--rice{background:var(--rice);color:var(--charcoal)}
.section--ink{background:var(--ink);color:var(--apricot-soft)}
.section--apricot{background:linear-gradient(155deg,var(--apricot-soft) 0%,var(--apricot) 68%,var(--apricot-deep) 100%);color:var(--charcoal)}
.section--ink h1,.section--ink h2,.section--ink h3{color:var(--rice)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.2em;font-variant-numeric:tabular-nums;color:var(--wood);margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:3px;border-radius:2px;background:var(--apricot)}
.section--ink .eyebrow{color:var(--apricot)}
.section-title{font-size:clamp(28px,4.2vw,52px);line-height:1.2;margin-bottom:.5em}
.section-title em{font-style:normal;color:var(--cinnabar)}
.lede{font-size:clamp(16px,1.5vw,19px);line-height:1.92;color:var(--taupe);max-width:64ch}
.section--ink .lede{color:rgba(247,217,160,.82)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.08em}

/* ===== 3. 栅格 ===== */
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--4-8{grid-template-columns:4fr 8fr}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}

/* ===== 4. 按钮与标签 ===== */
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 24px;border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);background:var(--rice);color:var(--charcoal);font-size:15px;font-weight:700;letter-spacing:.03em;cursor:pointer;box-shadow:5px 5px 0 var(--charcoal);transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease)}
.btn:hover{transform:translate(-3px,-3px);box-shadow:8px 8px 0 var(--charcoal)}
.btn--primary{background:var(--apricot)}
.btn--primary:hover{background:#F2A44F}
.btn--ghost{background:transparent;color:var(--apricot-soft);border-color:var(--apricot-soft);box-shadow:5px 5px 0 rgba(247,217,160,.34)}
.btn--ghost:hover{background:rgba(247,217,160,.12);box-shadow:8px 8px 0 rgba(247,217,160,.5)}
.pill-cta{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;background:var(--apricot);color:var(--charcoal);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);font-size:14.5px;font-weight:700;letter-spacing:.04em;white-space:nowrap;box-shadow:4px 4px 0 rgba(20,16,12,.9);transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease)}
.pill-cta::after{content:"→";font-family:var(--font-mono);font-size:13px;line-height:1}
.pill-cta:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(20,16,12,.9);background:#F2A44F}
.pill-cta--ghost{background:transparent;color:var(--apricot-soft);border-color:var(--apricot-soft);box-shadow:4px 4px 0 rgba(247,217,160,.3);margin-top:20px}
.pill-cta--ghost:hover{background:rgba(247,217,160,.14);color:var(--rice);box-shadow:6px 6px 0 rgba(247,217,160,.44)}
.tag-row{display:flex;flex-wrap:wrap;gap:9px}
.tag{padding:7px 15px;border:2.5px solid var(--charcoal);border-radius:var(--r-pill);background:transparent;color:var(--charcoal);font-size:13px;letter-spacing:.05em;cursor:pointer;transition:background .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.tag:hover{background:rgba(232,150,60,.22)}
.tag[aria-pressed="true"]{background:var(--apricot);box-shadow:3px 3px 0 var(--charcoal);transform:translate(-1px,-1px)}

/* ===== 5. 面包屑 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;font-variant-numeric:tabular-nums;color:var(--taupe);margin-bottom:22px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";opacity:.45}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{border-bottom:1px solid currentColor;padding-bottom:1px;transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cinnabar)}

/* ===== 6. 头部：悬浮胶囊浮岛 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:90;padding:16px var(--gutter);transition:padding .35s var(--ease)}
.site-header[data-scrolled="true"]{padding-top:8px;padding-bottom:8px}
.site-header::before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(22,52,42,.92) 0%,rgba(22,52,42,.56) 66%,rgba(22,52,42,0) 100%);opacity:0;transition:opacity .32s var(--ease)}
.site-header[data-scrolled="true"]::before{opacity:1}
.scroll-progress{position:absolute;left:0;right:0;top:0;height:3px;overflow:hidden;pointer-events:none}
.scroll-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--apricot),var(--cinnabar));transition:width .1s linear}
.header-shell{position:relative;max-width:var(--shell);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:clamp(8px,1.4vw,18px)}

.skip-link{position:absolute;left:50%;top:-96px;transform:translateX(-50%);z-index:200;padding:12px 24px;background:var(--apricot);color:var(--charcoal);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);font-weight:700;box-shadow:4px 4px 0 var(--charcoal);transition:top .22s var(--ease)}
.skip-link:focus{top:14px}

.brand-island{display:inline-flex;align-items:center;gap:10px;padding:7px 18px 7px 8px;background:var(--rice);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);box-shadow:4px 4px 0 rgba(20,16,12,.9);flex:0 0 auto;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.brand-island:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(20,16,12,.9)}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;flex:0 0 auto;background:radial-gradient(circle at 33% 28%,#FFE9C0,var(--apricot) 56%,var(--apricot-deep) 100%);border:2.5px solid var(--charcoal);border-radius:50% 50% 48% 48%/54% 54% 46% 46%;font-family:var(--font-display);font-size:20px;line-height:1;color:var(--charcoal)}
.brand-mark--lg{width:56px;height:56px;font-size:29px;border-color:var(--rice)}
.brand-words{display:flex;flex-direction:column;line-height:1.16}
.brand-name{font-family:var(--font-display);font-size:19px;font-weight:700;letter-spacing:.08em;color:var(--ink)}
.brand-line{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;color:var(--taupe);font-variant-numeric:tabular-nums}
.site-header[data-scrolled="true"] .brand-line{opacity:0;height:0;overflow:hidden;transition:opacity .25s var(--ease)}

.nav-capsule{display:flex;align-items:center;gap:6px;padding:6px;background:var(--ink);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);box-shadow:4px 4px 0 rgba(20,16,12,.9)}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:block}
.nav-link{display:inline-flex;align-items:center;gap:7px;padding:9px 14px;border-radius:var(--r-pill);color:var(--apricot-soft);font-size:clamp(12.5px,1.02vw,14.5px);font-weight:500;letter-spacing:.045em;white-space:nowrap;transition:background .22s var(--ease),color .22s var(--ease)}
.nav-link::before{content:attr(data-index);font-family:var(--font-mono);font-size:10.5px;font-variant-numeric:tabular-nums;letter-spacing:.06em;color:var(--apricot);opacity:.78}
.nav-link:hover{background:var(--ink-2);color:var(--rice)}
.nav-link:hover::before{color:var(--apricot-soft);opacity:1}
.nav-link[aria-current="page"]{background:var(--apricot);color:var(--charcoal);box-shadow:inset 0 0 0 2px var(--wood)}
.nav-link[aria-current="page"]::before{color:var(--cinnabar);opacity:1}
.nav-item--cta{display:none}
.nav-link--cta{background:var(--apricot);color:var(--charcoal);font-weight:700;justify-content:center}
.nav-link--cta::before{content:"";display:none}
.nav-utility{display:none;align-items:center;gap:2px;margin-left:4px;padding-left:10px;border-left:1px solid rgba(247,217,160,.28)}
.nav-utility a{display:inline-block;padding:8px 10px;border-radius:var(--r-pill);font-size:12.5px;letter-spacing:.06em;color:var(--apricot-soft);opacity:.82;white-space:nowrap;transition:background .2s var(--ease),opacity .2s var(--ease)}
.nav-utility a:hover{background:var(--ink-2);opacity:1}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{display:none;align-items:center;gap:9px;padding:11px 16px;background:var(--rice);color:var(--charcoal);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);box-shadow:4px 4px 0 rgba(20,16,12,.9);cursor:pointer;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.nav-toggle:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(20,16,12,.9)}
.nav-toggle-box{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-box span{display:block;height:2.5px;border-radius:2px;background:var(--charcoal);transition:transform .25s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.nav-toggle-text{font-size:13.5px;font-weight:600;letter-spacing:.1em}

@media (min-width:1280px){
  .nav-utility{display:flex}
}

/* ===== 7. 页脚：果篮底板 ===== */
.site-footer{position:relative;overflow:hidden;background:var(--ink);color:var(--apricot-soft);border-top:7px solid var(--wood);padding:clamp(44px,6vw,86px) 0 30px}
.site-footer::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  repeating-linear-gradient(90deg,rgba(247,217,160,.055) 0 1px,transparent 1px 96px),
  radial-gradient(120% 82% at 10% -4%,rgba(232,150,60,.26),transparent 60%),
  radial-gradient(90% 70% at 96% 108%,rgba(76,122,94,.34),transparent 62%)}
.footer-inner{position:relative;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter);display:grid;grid-template-columns:minmax(250px,1fr) minmax(0,1.6fr);gap:clamp(28px,4vw,64px)}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-brand__name{font-family:var(--font-display);font-size:26px;letter-spacing:.1em;color:var(--rice);margin:16px 0 4px}
.footer-brand__line{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;font-variant-numeric:tabular-nums;color:var(--apricot);margin:0 0 14px}
.footer-brand__note{font-size:14.5px;line-height:1.85;color:rgba(247,217,160,.74);max-width:34ch}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,36px)}
.footer-col__title{font-family:var(--font-display);font-size:16.5px;letter-spacing:.06em;color:var(--apricot-soft);padding-bottom:12px;margin-bottom:14px;border-bottom:2px solid rgba(247,217,160,.28);position:relative}
.footer-col__title::after{content:"";position:absolute;left:0;bottom:-2px;width:42px;height:2px;background:var(--apricot)}
.footer-col__list li{margin-bottom:2px}
.footer-col__list a{display:inline-block;padding:5px 0;font-size:14.5px;color:rgba(247,217,160,.8);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.footer-col__list a:hover{color:var(--apricot);border-bottom-color:var(--apricot);transform:translateX(3px)}
.footer-legal{position:relative;max-width:var(--shell);margin:clamp(30px,5vw,62px) auto 0;padding:22px var(--gutter) 0;border-top:1px solid rgba(247,217,160,.22);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 28px;font-size:13px;color:rgba(247,217,160,.68)}
.footer-legal__links{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.footer-legal__links li{display:flex;align-items:center;gap:16px}
.footer-legal__links li::after{content:"·";opacity:.5}
.footer-legal__links li:last-child::after{content:""}
.footer-legal__links a{border-bottom:1px solid rgba(247,217,160,.4);transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-legal__links a:hover{color:var(--apricot);border-color:var(--apricot)}
.footer-legal__meta{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em;margin:0}
.footer-legal__contact{flex:1 1 100%;margin:0;line-height:1.8;letter-spacing:.02em}

/* ===== 8. 卷轴显现 ===== */
html.js-ready [data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
html.js-ready [data-reveal].is-revealed{opacity:1;transform:none}

/* ===== 9. 内容组件 ===== */
.plaque-card{position:relative;display:flex;flex-direction:column;gap:12px;padding:clamp(20px,2.4vw,30px);background:var(--rice);color:var(--charcoal);border:var(--bw) solid var(--charcoal);border-radius:var(--r);box-shadow:var(--shadow-hard);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.plaque-card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--charcoal)}
.plaque-card__title{font-family:var(--font-display);font-size:clamp(19px,2vw,24px);line-height:1.36}
.plaque-card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;font-variant-numeric:tabular-nums;color:var(--wood)}
.plaque-card__body{font-size:15.5px;line-height:1.86;color:var(--taupe)}
.plaque-card--ink{background:var(--ink);color:var(--apricot-soft);border-color:var(--charcoal)}
.plaque-card--ink .plaque-card__title{color:var(--rice)}
.plaque-card--ink .plaque-card__meta{color:var(--apricot)}
.plaque-card--ink .plaque-card__body{color:rgba(247,217,160,.8)}
.card-stack{display:grid;gap:clamp(16px,2vw,26px)}
.card-stack--offset>*:nth-child(odd){margin-right:clamp(0px,4vw,54px)}
.card-stack--offset>*:nth-child(even){margin-left:clamp(0px,4vw,54px)}

.seed-badge{display:inline-grid;place-items:center;min-width:36px;height:36px;padding:0 10px;background:var(--rice);color:var(--charcoal);border:2.5px solid var(--charcoal);border-radius:var(--r-pill);font-family:var(--font-mono);font-size:13px;font-variant-numeric:tabular-nums;letter-spacing:.06em;box-shadow:3px 3px 0 rgba(20,16,12,.85)}
.seed-badge--apricot{background:var(--apricot)}
.seed-badge--ink{background:var(--ink);color:var(--apricot-soft)}

.ledger-wrap{overflow-x:auto;border-radius:var(--r)}
.ledger{width:100%;border-collapse:collapse;background:var(--rice);color:var(--charcoal);border:var(--bw) solid var(--charcoal);box-shadow:var(--shadow-hard);font-size:15px}
.ledger-wrap .ledger{min-width:620px}
.ledger caption{text-align:left;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;color:var(--wood);padding:0 0 12px}
.ledger th,.ledger td{padding:13px 16px;text-align:left;vertical-align:top;border-bottom:1px solid rgba(20,16,12,.16)}
.ledger thead th{background:var(--apricot-soft);border-bottom:2.5px solid var(--charcoal);font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--ink)}
.ledger tbody tr:last-child td{border-bottom:0}
.ledger tbody tr:nth-child(even){background:rgba(247,217,160,.22)}
.ledger tbody tr:hover{background:rgba(232,150,60,.2)}
.ledger td:first-child,.ledger th:first-child{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.08em;color:var(--wood);white-space:nowrap}
.ledger tbody tr[data-state="highlight"]{background:rgba(194,64,46,.12);box-shadow:inset 4px 0 0 var(--cinnabar)}

.orchard-rail{position:relative;padding-left:56px}
.orchard-rail::before{content:"";position:absolute;left:16.5px;top:12px;bottom:12px;width:3px;border-radius:2px;background:linear-gradient(180deg,var(--apricot),var(--wood))}
.orchard-rail li{position:relative;display:flex;align-items:center;min-height:40px;padding:9px 0;font-size:15.5px;letter-spacing:.02em}
.orchard-rail li::before{content:attr(data-index);position:absolute;left:-56px;top:8px;display:grid;place-items:center;width:36px;height:36px;background:var(--rice);border:2.5px solid var(--charcoal);border-radius:50%;font-family:var(--font-mono);font-size:12.5px;font-variant-numeric:tabular-nums;box-shadow:3px 3px 0 rgba(20,16,12,.85)}

.figure-frame{position:relative;display:block;overflow:hidden;aspect-ratio:4/3;border:var(--bw) solid var(--charcoal);border-radius:var(--r);box-shadow:var(--shadow-hard);background:linear-gradient(150deg,var(--apricot-soft) 0%,var(--apricot) 58%,var(--apricot-deep) 100%)}
.figure-frame>img,.figure-frame>svg{width:100%;height:100%;object-fit:cover}
.figure-frame--wide{aspect-ratio:16/9}
.figure-frame--tall{aspect-ratio:3/4}
.figure-frame--square{aspect-ratio:1/1}
.figure-frame__label{position:absolute;left:14px;bottom:14px;padding:7px 14px;background:var(--rice);color:var(--charcoal);border:2.5px solid var(--charcoal);border-radius:var(--r-pill);font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;font-variant-numeric:tabular-nums;box-shadow:3px 3px 0 var(--charcoal)}
.figure-frame__anchor{position:absolute;right:16px;top:16px}

.apricot-anchor{--size:clamp(88px,12vw,150px);position:relative;width:var(--size);height:calc(var(--size)*.94);background:radial-gradient(circle at 34% 28%,#FFE9C0,var(--apricot) 54%,var(--apricot-deep) 100%);border:var(--bw) solid var(--charcoal);border-radius:50% 50% 48% 48%/54% 54% 46% 46%;box-shadow:var(--shadow-hard)}
.apricot-anchor::before{content:"";position:absolute;top:-10%;left:50%;width:34%;height:17%;transform:translateX(-50%) rotate(-12deg);background:var(--bamboo);border:2.5px solid var(--charcoal);border-radius:60% 40% 55% 45%/70% 70% 30% 30%}

.fold{border:var(--bw) solid var(--charcoal);border-radius:var(--r);background:var(--rice);box-shadow:var(--shadow-hard);overflow:hidden}
.fold+.fold{margin-top:14px}
.fold summary{display:flex;align-items:center;gap:12px;padding:16px 20px;font-family:var(--font-display);font-size:17px;cursor:pointer;list-style:none}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{content:"+";margin-left:auto;font-family:var(--font-mono);font-size:20px;color:var(--cinnabar)}
.fold[open] summary::after{content:"–"}
.fold[open] summary{border-bottom:2.5px solid var(--charcoal);background:var(--apricot-soft)}
.fold__body{padding:18px 20px;font-size:15.5px;color:var(--taupe)}

.to-top{position:fixed;right:clamp(14px,3vw,32px);bottom:clamp(14px,3vw,28px);z-index:80;display:inline-flex;align-items:center;gap:8px;padding:12px 18px;background:var(--rice);color:var(--charcoal);border:var(--bw) solid var(--charcoal);border-radius:var(--r-pill);box-shadow:5px 5px 0 var(--charcoal);font-size:13.5px;font-weight:700;letter-spacing:.08em;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s,box-shadow .22s var(--ease)}
.to-top::before{content:"↑";font-family:var(--font-mono);font-size:14px;color:var(--cinnabar)}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{box-shadow:8px 8px 0 var(--charcoal)}

/* ===== 10. 响应式 ===== */
@media (max-width:1079px){
  .site-header{padding:12px var(--gutter)}
  .header-shell{gap:10px}
  .nav-toggle{display:inline-flex}
  .nav-capsule{position:absolute;top:calc(100% + 12px);left:0;right:0;flex-direction:column;align-items:stretch;gap:8px;padding:14px;border-radius:var(--r-lg);box-shadow:7px 7px 0 rgba(20,16,12,.9);max-height:calc(100vh - 150px);overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-12px) scale(.99);transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s}
  .nav-capsule[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav-capsule::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;border-radius:0 0 var(--r-lg) var(--r-lg);background:linear-gradient(90deg,var(--apricot),var(--cinnabar))}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{width:100%;justify-content:flex-start;padding:13px 16px;border-radius:14px;font-size:16px}
  .nav-link::before{font-size:12px}
  .nav-item--cta{display:block;margin-top:6px}
  .nav-link--cta{font-size:16px;justify-content:center;padding:14px 16px}
  .nav-utility{display:flex;flex-direction:column;align-items:stretch;gap:2px;margin:8px 0 0;padding:10px 0 0;border-left:0;border-top:1px solid rgba(247,217,160,.28)}
  .nav-utility a{padding:11px 16px;border-radius:14px;font-size:14px}
}
@media (max-width:900px){
  .grid--5-7,.grid--4-8{grid-template-columns:1fr}
  .card-stack--offset>*:nth-child(odd),.card-stack--offset>*:nth-child(even){margin-left:0;margin-right:0}
  .footer-inner{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  .site-header[data-scrolled="true"] .brand-line{opacity:1;height:auto}
  .brand-line{display:none}
}
@media (max-width:640px){
  .header-actions .pill-cta{display:none}
  .brand-island{padding:6px 14px 6px 7px}
  .brand-name{font-size:17.5px}
  .footer-cols{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .footer-brand__note{max-width:none}
}

/* ===== 11. 无障碍与动效降级 ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .to-top{transition:none}
}