/* ===== 01 设计令牌 ===== */
:root{
  --sj-gold:#D4A64A;
  --sj-gold-deep:#8C6B1F;
  --sj-gold-line:#E8D4A8;
  --sj-ink:#121212;
  --sj-night:#1B2A41;
  --sj-sand:#F4EAD6;
  --sj-paper:#FAF7F1;
  --sj-jade:#2E8B6E;
  --sj-cinnabar:#C0392B;
  --sj-stone:#6E6A63;
  --sj-font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;
  --sj-font-body:"PingFang SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sj-font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",ui-monospace,monospace;
  --sj-maxw:1240px;
  --sj-gutter:clamp(18px,4vw,44px);
  --sj-radius-l:26px;
  --sj-radius-m:16px;
  --sj-radius-s:10px;
  --sj-hairline:1px solid rgba(212,166,74,.24);
  --sj-ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== 02 Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse}

/* ===== 03 基础排版 ===== */
body{
  background:var(--sj-ink);
  color:var(--sj-sand);
  font-family:var(--sj-font-body);
  font-size:1.0625rem;
  font-weight:400;
  line-height:1.7;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--sj-font-display);font-weight:900;line-height:1.16;letter-spacing:.004em}
h1{font-size:clamp(2.2rem,6vw,3.2rem);line-height:1.08}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.15rem}
h4{font-size:1rem}
p{max-width:68ch}
a{text-decoration-thickness:1px;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--sj-gold);outline-offset:3px;border-radius:6px}
.sj-mono,.sj-stamp,.sj-num{
  font-family:var(--sj-font-mono);
  letter-spacing:-.01em;
  text-shadow:0 0 .6px var(--sj-gold-deep);
}
.sj-display{font-family:var(--sj-font-display);font-weight:900;font-size:clamp(2.2rem,6vw,3.2rem);line-height:1.08;letter-spacing:-.005em}
.sj-lead{font-size:clamp(1.0625rem,1.5vw,1.2rem);line-height:1.7;color:rgba(244,234,214,.8);max-width:56ch}
.sj-muted{color:rgba(244,234,214,.62)}
.sj-eyebrow{font-family:var(--sj-font-mono);font-size:.8125rem;letter-spacing:.2em;color:var(--sj-gold);margin:0 0 .6rem}
.sj-rule{height:1px;border:0;margin:clamp(24px,4vw,40px) 0;background:linear-gradient(90deg,rgba(212,166,74,.65),rgba(212,166,74,.06) 70%,transparent)}

/* ===== 04 跳转链接 ===== */
.sj-skip{
  position:fixed;left:16px;top:-70px;z-index:200;
  background:var(--sj-gold);color:var(--sj-ink);
  padding:11px 18px;border-radius:0 0 12px 12px;
  font-weight:700;text-decoration:none;font-size:.9375rem;
  transition:top .2s var(--sj-ease);
}
.sj-skip:focus{top:0}

/* ===== 05 头部 ===== */
.sj-header{
  position:sticky;top:0;z-index:100;
  background:linear-gradient(180deg,#141414 0%,#0E0E0E 100%);
  border-bottom:1px solid rgba(212,166,74,.22);
  color:var(--sj-sand);
}
.sj-header::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(212,166,74,.05) 0 1px,transparent 1px 5px);
  opacity:.5;
}
.sj-header__inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:clamp(12px,2vw,28px);
  padding:20px 0 14px;
}
.sj-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(212,166,74,.12);overflow:hidden}
.sj-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,#8C6B1F,#D4A64A 55%,#E8D4A8);
  transition:transform .12s linear;
}
.sj-utility{display:flex;align-items:center;gap:12px;min-width:0}
.sj-utility--end{justify-self:end}
.sj-stamp{font-size:.8125rem;color:var(--sj-gold);white-space:nowrap}
.sj-status{display:inline-flex;align-items:center;gap:8px;font-size:.8125rem;font-family:var(--sj-font-mono);color:rgba(244,234,214,.78);white-space:nowrap}
.sj-status__dot{width:8px;height:8px;border-radius:50%;background:var(--sj-jade);box-shadow:0 0 0 3px rgba(46,139,110,.18);flex:none}
.sj-status--warn .sj-status__dot{background:var(--sj-cinnabar);box-shadow:0 0 0 3px rgba(192,57,43,.18)}
.sj-status--pulse .sj-status__dot{animation:sj-breathe .4s ease-out 1}
@keyframes sj-breathe{
  0%{box-shadow:0 0 0 0 rgba(46,139,110,.55)}
  100%{box-shadow:0 0 0 9px rgba(46,139,110,0)}
}
.sj-masthead{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;min-width:0}
.sj-brand{
  display:inline-flex;align-items:baseline;gap:8px;
  font-family:var(--sj-font-display);font-weight:900;
  font-size:clamp(1.35rem,2.6vw,1.85rem);letter-spacing:.06em;
  text-decoration:none;color:var(--sj-sand);white-space:nowrap;
}
.sj-brand:hover .sj-brand__mark{filter:brightness(1.08)}
.sj-brand__mark{color:var(--sj-sand)}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .sj-brand__mark{
    background:linear-gradient(100deg,#F6E8C6,#D4A64A 55%,#B78C33);
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;color:transparent;
  }
}
.sj-brand__sub{font-family:var(--sj-font-mono);font-weight:500;font-size:.75rem;letter-spacing:.24em;color:var(--sj-gold)}
.sj-brand__claim{
  margin:0;font-family:var(--sj-font-mono);font-size:.75rem;letter-spacing:.34em;
  color:rgba(244,234,214,.52);
}
.sj-totop{
  display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:8px 14px;border-radius:12px;
  border:1px solid rgba(212,166,74,.42);
  color:var(--sj-gold);font-size:.8125rem;font-family:var(--sj-font-mono);
  cursor:pointer;white-space:nowrap;
  animation:sj-fade .18s var(--sj-ease) 1;
  transition:background-color .16s var(--sj-ease),border-color .16s var(--sj-ease);
}
.sj-totop[hidden]{display:none}
.sj-totop:hover{background:rgba(212,166,74,.13);border-color:var(--sj-gold-deep)}
.sj-totop__icon{font-family:var(--sj-font-mono);line-height:1}
.sj-totop--flat{
  border:0;padding:6px 0;min-height:32px;border-radius:0;
  text-decoration:underline;text-underline-offset:4px;
  color:rgba(244,234,214,.72);
}
.sj-totop--flat:hover{background:none;color:var(--sj-gold)}
@keyframes sj-fade{from{opacity:0}to{opacity:1}}

/* ===== 06 导航 ===== */
.sj-nav{
  position:relative;z-index:1;
  border-top:1px solid rgba(212,166,74,.16);
  background:rgba(10,10,10,.86);
}
.sj-nav__inner{display:flex;align-items:center;justify-content:center;gap:8px}
.sj-nav__list{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:clamp(2px,1.4vw,16px);list-style:none;margin:0;padding:0;
}
.sj-nav__link{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  min-height:46px;padding:8px 10px;border-radius:10px;
  text-decoration:none;font-size:.9375rem;font-weight:500;
  color:rgba(244,234,214,.78);
  transition:color .16s var(--sj-ease);
}
.sj-nav__link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:7px;height:1px;
  background:linear-gradient(90deg,transparent,var(--sj-gold),transparent);
  transform:scaleX(0);transform-origin:50%;
  transition:transform .2s var(--sj-ease);
}
.sj-nav__link:hover{color:var(--sj-gold)}
.sj-nav__link:hover::after{transform:scaleX(1)}
.sj-nav__link[aria-current="page"]{color:var(--sj-gold);font-weight:700}
.sj-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.sj-nav__index{font-family:var(--sj-font-mono);font-size:.6875rem;letter-spacing:.06em;color:var(--sj-stone)}
.sj-nav__link[aria-current="page"] .sj-nav__index{color:var(--sj-gold)}
.sj-nav__toggle{
  display:none;align-items:center;justify-content:space-between;gap:12px;
  width:100%;min-height:52px;padding:12px 2px;
  color:var(--sj-sand);font-weight:700;cursor:pointer;
}
.sj-nav__toggle-text{font-family:var(--sj-font-mono);font-size:.8125rem;letter-spacing:.2em;color:var(--sj-gold)}
.sj-nav__bars{display:inline-flex;flex-direction:column;gap:5px;width:22px;flex:none}
.sj-nav__bars span{display:block;height:2px;border-radius:2px;background:var(--sj-gold);transition:transform .2s var(--sj-ease),opacity .2s var(--sj-ease)}
.sj-nav__toggle[aria-expanded="true"] .sj-nav__bars span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sj-nav__toggle[aria-expanded="true"] .sj-nav__bars span:nth-child(2){opacity:0}
.sj-nav__toggle[aria-expanded="true"] .sj-nav__bars span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 07 通用容器与色区 ===== */
.sj-container{width:min(calc(100% - var(--sj-gutter) * 2),var(--sj-maxw));margin-inline:auto}
.sj-container--narrow{width:min(calc(100% - var(--sj-gutter) * 2),880px);margin-inline:auto}
.sj-main{display:block;min-height:40vh}
.sj-band{padding:clamp(44px,7vw,96px) 0;position:relative}
.sj-band--ink{background:var(--sj-ink)}
.sj-band--night{background:linear-gradient(180deg,#1B2A41 0%,#16223A 60%,#121212 100%)}
.sj-band--sand{background:linear-gradient(180deg,var(--sj-sand) 0%,var(--sj-paper) 100%);color:var(--sj-ink)}
.sj-band--sand .sj-lead,.sj-band--sand .sj-muted,.sj-band--sand .sj-chapter__desc{color:rgba(18,18,18,.7)}
.sj-band--sand .sj-eyebrow{color:var(--sj-gold-deep)}
.sj-band--gold{background:linear-gradient(140deg,rgba(212,166,74,.16),rgba(27,42,65,.9) 70%,#121212)}
.sj-noise{
  background-image:
    repeating-linear-gradient(115deg,rgba(212,166,74,.055) 0 1px,transparent 1px 6px),
    repeating-linear-gradient(25deg,rgba(18,18,18,.16) 0 1px,transparent 1px 9px);
}
.sj-panel{
  background:linear-gradient(160deg,rgba(27,42,65,.86),rgba(18,18,18,.92));
  border:var(--sj-hairline);border-radius:var(--sj-radius-l);
  padding:clamp(18px,2.4vw,32px);position:relative;
}
.sj-panel--sand{background:linear-gradient(160deg,var(--sj-paper),var(--sj-sand));color:var(--sj-ink);border-color:rgba(140,107,31,.26)}
.sj-panel--sand .sj-lead,.sj-panel--sand .sj-muted{color:rgba(18,18,18,.7)}
.sj-panel--gold{background:linear-gradient(150deg,rgba(212,166,74,.16),rgba(27,42,65,.7));border-color:rgba(212,166,74,.42)}
.sj-panel--flush{padding:0;overflow:hidden}

/* ===== 08 Bento 网格与卡片 ===== */
.sj-bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(12px,1.6vw,20px)}
.sj-span-3{grid-column:span 3}
.sj-span-4{grid-column:span 4}
.sj-span-5{grid-column:span 5}
.sj-span-6{grid-column:span 6}
.sj-span-7{grid-column:span 7}
.sj-span-8{grid-column:span 8}
.sj-span-12{grid-column:span 12}
.sj-card{
  position:relative;
  background:linear-gradient(160deg,rgba(27,42,65,.9),rgba(18,18,18,.94));
  border:var(--sj-hairline);border-radius:var(--sj-radius-l);
  padding:clamp(16px,2vw,26px);
  transition:transform .18s var(--sj-ease),border-color .18s var(--sj-ease),box-shadow .18s var(--sj-ease);
}
.sj-card:hover{transform:translateY(-2px);border-color:rgba(212,166,74,.46);box-shadow:0 10px 26px rgba(0,0,0,.32)}
.sj-card--sand{background:linear-gradient(160deg,var(--sj-paper),var(--sj-sand));color:var(--sj-ink);border-color:rgba(140,107,31,.26)}
.sj-card--sand .sj-muted{color:rgba(18,18,18,.68)}
.sj-card--paper{background:var(--sj-paper);color:var(--sj-ink);border-color:rgba(140,107,31,.24)}
.sj-card--paper .sj-muted{color:rgba(18,18,18,.68)}
.sj-card--gold{background:linear-gradient(150deg,rgba(212,166,74,.18),rgba(27,42,65,.72));border-color:rgba(212,166,74,.44)}
.sj-card--organic{border-radius:26px 14px 30px 12px}
.sj-card__title{font-family:var(--sj-font-display);font-weight:900;font-size:1.15rem;margin:0 0 .5rem}
.sj-card__meta{margin:.75rem 0 0;font-family:var(--sj-font-mono);font-size:.8125rem;color:var(--sj-stone);letter-spacing:.03em}

/* ===== 09 按钮与标签 ===== */
.sj-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:10px 18px;border-radius:14px;border:1px solid transparent;
  font-weight:700;font-size:.9375rem;text-decoration:none;cursor:pointer;
  transition:transform .16s var(--sj-ease),background-color .16s var(--sj-ease),border-color .16s var(--sj-ease),color .16s var(--sj-ease);
}
.sj-btn--primary{
  background:linear-gradient(135deg,#E8D4A8,#D4A64A 48%,#B78C33);
  color:var(--sj-ink);border-color:var(--sj-gold-deep);
  box-shadow:0 6px 18px rgba(212,166,74,.18);
}
.sj-btn--primary:hover{transform:translateY(-1px);background:linear-gradient(135deg,#F3E3BE,#DFB459 48%,#C79A3C)}
.sj-btn--ghost{background:transparent;color:var(--sj-gold);border-color:rgba(212,166,74,.55)}
.sj-btn--ghost:hover{background:rgba(212,166,74,.12);border-color:var(--sj-gold-deep)}
.sj-btn--quiet{background:rgba(244,234,214,.06);color:var(--sj-sand);border-color:rgba(212,166,74,.22)}
.sj-btn--quiet:hover{border-color:var(--sj-gold-deep);color:var(--sj-gold)}
.sj-btn:focus-visible{outline-color:var(--sj-gold-line);box-shadow:0 0 0 4px rgba(140,107,31,.35)}
.sj-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;font-family:var(--sj-font-mono);font-size:.8125rem;
  border:1px solid rgba(212,166,74,.36);color:var(--sj-gold);background:rgba(212,166,74,.08);
}
.sj-tag--ok{color:#8FE0C1;border-color:rgba(46,139,110,.55);background:rgba(46,139,110,.16)}
.sj-tag--warn{color:#F09A8D;border-color:rgba(192,57,43,.55);background:rgba(192,57,43,.16)}
.sj-band--sand .sj-tag,.sj-panel--sand .sj-tag,.sj-card--sand .sj-tag,.sj-card--paper .sj-tag{color:var(--sj-gold-deep);background:rgba(140,107,31,.1)}
.sj-band--sand .sj-tag--ok,.sj-panel--sand .sj-tag--ok{color:#1F6B52;border-color:rgba(46,139,110,.5);background:rgba(46,139,110,.14)}
.sj-band--sand .sj-tag--warn,.sj-panel--sand .sj-tag--warn{color:#93261A;border-color:rgba(192,57,43,.5);background:rgba(192,57,43,.12)}

/* ===== 10 章节头、面包屑、目录、时间轴 ===== */
.sj-chapter{display:grid;grid-template-columns:auto 1fr;gap:clamp(12px,2vw,26px);align-items:start;margin-bottom:clamp(18px,3vw,34px)}
.sj-chapter__num{
  font-family:var(--sj-font-mono);font-weight:700;
  font-size:clamp(2rem,5vw,3.2rem);line-height:1;
  color:rgba(212,166,74,.2);
  -webkit-text-stroke:1px var(--sj-gold-deep);
  text-shadow:0 0 18px rgba(212,166,74,.22);
}
.sj-chapter__title{font-family:var(--sj-font-display);font-weight:900;font-size:clamp(1.5rem,3vw,2.1rem);margin:0 0 .4rem}
.sj-chapter__desc{margin:0;color:rgba(244,234,214,.72);max-width:60ch;font-size:1rem}
.sj-breadcrumb{margin:0 0 clamp(14px,2vw,22px);font-size:.875rem;color:rgba(244,234,214,.6)}
.sj-breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.sj-breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.sj-breadcrumb li+li::before{content:"/";color:rgba(212,166,74,.5)}
.sj-breadcrumb a{text-decoration:none;color:inherit;padding:2px 0}
.sj-breadcrumb a:hover{color:var(--sj-gold)}
.sj-breadcrumb [aria-current="page"]{color:var(--sj-gold)}
.sj-band--sand .sj-breadcrumb{color:rgba(18,18,18,.6)}
.sj-toc{list-style:none;margin:0;padding:0;display:grid;gap:2px;border-left:1px solid rgba(212,166,74,.22)}
.sj-toc a{
  display:flex;align-items:center;gap:10px;min-height:42px;padding:8px 12px;
  margin-left:-1px;border-left:2px solid transparent;
  text-decoration:none;font-size:.9375rem;color:rgba(244,234,214,.72);
  transition:color .16s var(--sj-ease),background-color .16s var(--sj-ease),border-color .16s var(--sj-ease);
}
.sj-toc a:hover{color:var(--sj-gold)}
.sj-toc a[aria-current="true"]{color:var(--sj-gold);border-left-color:var(--sj-gold);background:linear-gradient(90deg,rgba(212,166,74,.14),transparent)}
.sj-band--sand .sj-toc{border-left-color:rgba(140,107,31,.3)}
.sj-band--sand .sj-toc a{color:rgba(18,18,18,.72)}
.sj-timeline{list-style:none;margin:0;padding:0}
.sj-timeline > li{position:relative;padding:0 0 26px 28px;border-left:1px solid rgba(212,166,74,.3)}
.sj-timeline > li:last-child{padding-bottom:0;border-left-color:transparent}
.sj-timeline > li::before{
  content:"";position:absolute;left:-5px;top:9px;width:9px;height:9px;border-radius:50%;
  background:var(--sj-ink);border:2px solid var(--sj-gold);
}
.sj-timeline__time{display:block;font-family:var(--sj-font-mono);font-size:.8125rem;color:var(--sj-gold);letter-spacing:.04em;margin-bottom:2px}

/* ===== 11 表格、步骤、正文 ===== */
.sj-table-wrap{overflow-x:auto;border:var(--sj-hairline);border-radius:var(--sj-radius-m);background:rgba(18,18,18,.35)}
.sj-table{width:100%;min-width:560px;font-size:.9875rem}
.sj-table caption{caption-side:top;text-align:left;padding:14px 16px;font-family:var(--sj-font-mono);font-size:.8125rem;color:var(--sj-gold);letter-spacing:.08em}
.sj-table th{background:var(--sj-night);color:var(--sj-sand);font-weight:700;text-align:left;padding:12px 16px;border-bottom:1px solid rgba(212,166,74,.35);white-space:nowrap}
.sj-table td{padding:12px 16px;border-bottom:1px solid rgba(212,166,74,.16);vertical-align:top}
.sj-table tbody tr:nth-child(even){background:rgba(244,234,214,.035)}
.sj-table tbody tr[data-highlight]{background:rgba(212,166,74,.13)}
.sj-table tbody tr:last-child td{border-bottom:0}
.sj-table--sand{background:var(--sj-paper);color:var(--sj-ink)}
.sj-table--sand td{border-bottom-color:rgba(140,107,31,.18)}
.sj-table--sand tbody tr:nth-child(even){background:rgba(140,107,31,.06)}
.sj-table--sand tbody tr[data-highlight]{background:rgba(212,166,74,.22)}
.sj-steps{list-style:none;margin:0;padding:0;display:grid;gap:16px;counter-reset:sj-step}
.sj-steps > li{counter-increment:sj-step;position:relative;padding-left:56px;min-height:44px}
.sj-steps > li::before{
  content:counter(sj-step,decimal-leading-zero);
  position:absolute;left:0;top:0;width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:14px 7px 14px 7px;
  border:1px solid rgba(212,166,74,.45);
  background:rgba(212,166,74,.08);
  color:var(--sj-gold);font-family:var(--sj-font-mono);font-size:.8125rem;
}
.sj-prose{max-width:68ch}
.sj-prose h2{margin:1.8em 0 .6em;font-size:clamp(1.5rem,3vw,2.1rem)}
.sj-prose h3{margin:1.5em 0 .5em}
.sj-prose p{margin:0 0 1.1em}
.sj-prose ul,.sj-prose ol{margin:0 0 1.1em;padding-left:1.35em}
.sj-prose li{margin-bottom:.45em}
.sj-prose ul{list-style:none}
.sj-prose ul > li::before{content:"";display:inline-block;width:6px;height:6px;margin:0 .6em .15em 0;border-radius:50%;background:var(--sj-gold)}
.sj-prose blockquote{margin:1.4em 0;padding:.4em 0 .4em 18px;border-left:2px solid var(--sj-gold);color:rgba(244,234,214,.8)}
.sj-prose code{font-family:var(--sj-font-mono);font-size:.9em;padding:2px 6px;border-radius:6px;background:rgba(27,42,65,.8);border:1px solid rgba(212,166,74,.24);color:var(--sj-gold-line)}
.sj-band--sand .sj-prose blockquote{color:rgba(18,18,18,.72)}
.sj-band--sand .sj-prose code{background:rgba(140,107,31,.12);border-color:rgba(140,107,31,.28);color:#6B5015}

/* ===== 12 图片容器 ===== */
.sj-figure{
  margin:0;position:relative;overflow:hidden;
  border:var(--sj-hairline);border-radius:var(--sj-radius-l);
  background:linear-gradient(135deg,#1B2A41,#121212);
}
.sj-figure__img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;display:block}
.sj-figure--wide .sj-figure__img,.sj-figure--wide .sj-figure__ph{aspect-ratio:21/9}
.sj-figure--square .sj-figure__img,.sj-figure--square .sj-figure__ph{aspect-ratio:1/1}
.sj-figure--tall .sj-figure__img,.sj-figure--tall .sj-figure__ph{aspect-ratio:3/4}
.sj-figure__ph{
  aspect-ratio:16/10;display:grid;place-items:center;
  font-family:var(--sj-font-mono);font-size:.8125rem;letter-spacing:.2em;color:rgba(212,166,74,.75);
  background-image:
    repeating-linear-gradient(135deg,rgba(212,166,74,.1) 0 10px,transparent 10px 22px),
    radial-gradient(120% 90% at 20% 10%,rgba(212,166,74,.22),transparent 60%);
}
.sj-figure__cap{
  padding:10px 16px;font-size:.875rem;color:rgba(244,234,214,.68);
  background:rgba(18,18,18,.72);border-top:1px solid rgba(212,166,74,.18);
}
.sj-figure--sand{background:var(--sj-sand);border-color:rgba(140,107,31,.26)}
.sj-figure--sand .sj-figure__cap{color:rgba(18,18,18,.7);background:rgba(250,247,241,.92);border-top-color:rgba(140,107,31,.2)}

/* ===== 13 显现动效 ===== */
html.sj-js [data-reveal]{opacity:0;transform:translateY(14px)}
html.sj-js [data-reveal].is-in{opacity:1;transform:none;transition:opacity .5s var(--sj-ease),transform .5s var(--sj-ease)}

/* ===== 14 页脚 ===== */
.sj-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,#101010 0%,#0B0B0B 55%,#141414 100%);
  border-top:1px solid rgba(212,166,74,.3);
  color:rgba(244,234,214,.82);
}
.sj-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(212,166,74,.8),transparent);
}
.sj-footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1.3fr;
  gap:clamp(22px,4vw,52px);
  padding:clamp(34px,5vw,60px) 0 clamp(22px,3vw,36px);
}
.sj-footer__col{min-width:0}
.sj-footer__col--brand{max-width:44ch}
.sj-footer__brand{
  font-family:var(--sj-font-display);font-weight:900;font-size:1.25rem;
  color:var(--sj-gold);margin:0 0 .6rem;letter-spacing:.05em;
  text-shadow:0 0 .8px var(--sj-gold-deep);
}
.sj-footer__claim{margin:0 0 .9rem;color:rgba(244,234,214,.8);max-width:38ch}
.sj-footer__meta{margin:0 0 .45rem;font-size:.875rem;color:var(--sj-stone);max-width:44ch}
.sj-footer__title{
  font-family:var(--sj-font-mono);font-weight:500;font-size:.8125rem;letter-spacing:.2em;
  color:var(--sj-gold);margin:0 0 14px;text-transform:uppercase;
}
.sj-footer__list{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.sj-footer__list a,.sj-footer__list .sj-mono{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:.9375rem;color:rgba(244,234,214,.8);text-decoration:none;
  transition:color .16s var(--sj-ease);
}
.sj-footer__list a{border-bottom:1px solid transparent}
.sj-footer__list a:hover{color:var(--sj-gold);border-bottom-color:rgba(212,166,74,.55)}
.sj-footer__list .sj-mono{color:var(--sj-gold-line);font-size:.875rem;word-break:break-all}
.sj-bottom-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 22px;padding:16px 0 24px;
  border-top:1px solid rgba(212,166,74,.18);
  font-size:.8125rem;color:rgba(244,234,214,.62);
}
.sj-bottom-bar__legal,.sj-bottom-bar__mail{margin:0}
.sj-bottom-bar__mail .sj-mono{color:rgba(232,212,168,.85);font-size:.8125rem}
.sj-bottom-bar__links{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none;margin:0;padding:0}
.sj-bottom-bar__links a{display:inline-flex;align-items:center;min-height:32px;text-decoration:none;color:inherit}
.sj-bottom-bar__links a:hover{color:var(--sj-gold)}
.sj-bottom-bar__actions{display:flex;align-items:center;gap:14px;font-family:var(--sj-font-mono)}

/* ===== 15 响应式 ===== */
@media (max-width:1080px){
  .sj-span-3,.sj-span-4{grid-column:span 6}
  .sj-span-5,.sj-span-6,.sj-span-7,.sj-span-8{grid-column:span 12}
}
@media (max-width:960px){
  .sj-header__inner{grid-template-columns:1fr auto;row-gap:10px;padding:14px 0 10px}
  .sj-utility--start{display:none}
  .sj-masthead{align-items:flex-start;text-align:left}
  .sj-brand{font-size:clamp(1.2rem,4.8vw,1.55rem)}
  .sj-footer__grid{grid-template-columns:1fr 1fr}
  .sj-footer__col--brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .sj-nav__inner{display:block;padding:0}
  .sj-nav__toggle{display:flex}
  .sj-nav__list{display:none;flex-direction:column;align-items:stretch;gap:0;padding:2px 0 14px}
  .sj-nav[data-open] .sj-nav__list{display:flex}
  .sj-nav__list > li{border-top:1px solid rgba(212,166,74,.14)}
  .sj-nav__link{width:100%;justify-content:flex-start;gap:12px;min-height:52px;padding:12px 2px;border-radius:0;font-size:1rem}
  .sj-nav__link::after{display:none}
  .sj-nav__link[aria-current="page"]{background:linear-gradient(90deg,rgba(212,166,74,.14),transparent)}
  .sj-bento{grid-template-columns:repeat(6,minmax(0,1fr))}
  .sj-span-3,.sj-span-4{grid-column:span 3}
  .sj-span-5,.sj-span-6,.sj-span-7,.sj-span-8,.sj-span-12{grid-column:span 6}
  .sj-chapter{grid-template-columns:1fr}
  .sj-chapter__num{font-size:2.4rem}
}
@media (max-width:620px){
  .sj-bento{grid-template-columns:1fr}
  .sj-bento > *{grid-column:1 / -1}
  .sj-footer__grid{grid-template-columns:1fr;gap:26px}
  .sj-bottom-bar{flex-direction:column;align-items:flex-start}
  .sj-bottom-bar__actions{width:100%;justify-content:space-between}
  .sj-brand__claim{display:none}
  .sj-btn{padding:10px 14px;font-size:.875rem}
}
@media (max-width:400px){
  .sj-utility--end .sj-btn--primary{padding:10px 12px;font-size:.8125rem}
}

/* ===== 16 动效与无障碍降级 ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.sj-js [data-reveal]{opacity:1;transform:none}
  .sj-card:hover{transform:none}
  .sj-btn--primary:hover{transform:none}
  .sj-progress__bar{transition:none}
}