/* =========================================================
   胜博服务 · 共享样式 /assets/site.css
   档案纸米白 · 深靛蓝 · 砖红 · 铜金  |  年鉴索引式视觉
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:118px}
body{
  margin:0;
  min-height:100vh;
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(0deg, rgba(27,42,85,.022) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(27,42,85,.016) 0 1px, transparent 1px 5px);
  background-attachment:fixed;
}
img,svg{max-width:100%;height:auto;display:block}
figure{margin:0}
a{color:var(--indigo);text-decoration-thickness:1px;text-underline-offset:3px}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
ul,ol{margin:0}
p{margin:0 0 1.1em}
h1,h2,h3,h4{margin:0 0 .6em;line-height:1.2}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--brick);outline-offset:3px;border-radius:4px}
.sb-footer :focus-visible{outline-color:var(--copper)}

/* ---------- 2. 变量 ---------- */
:root{
  --paper:#F5F1E7;
  --card:#FCFAF4;
  --indigo:#1B2A55;
  --indigo-deep:#101A38;
  --brick:#A63A28;
  --copper:#B98A3C;
  --slate:#5A6673;
  --ink:#16191F;
  --mist:#E3E7F1;
  --brick-soft:#F0DCD6;

  --line-ink:rgba(27,42,85,.16);
  --line-ink-soft:rgba(27,42,85,.10);
  --line-gold:rgba(185,138,60,.5);

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --sb-gap:clamp(16px,2.4vw,28px);
  --radius:14px;
  --radius-lg:18px;
  --shell-w:1240px;
  --wrap-w:1200px;
  --shadow-soft:0 12px 30px rgba(16,26,56,.10);
  --shadow-lift:0 16px 34px rgba(16,26,56,.14);
}

/* ---------- 3. 骨架 ---------- */
.sb-wrap{width:100%;max-width:var(--wrap-w);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.sb-main{padding-top:clamp(92px,12vh,124px);padding-bottom:clamp(24px,4vw,48px)}
.sb-section{padding-block:clamp(36px,6vw,76px)}
.sb-divider{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--copper),rgba(185,138,60,0));opacity:.9}
.sb-sr-only{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.sb-skip{
  position:fixed;top:8px;left:8px;z-index:120;
  transform:translateY(-220%);
  padding:10px 18px;border-radius:999px;
  background:var(--indigo);color:var(--card);
  font-size:14px;text-decoration:none;
  box-shadow:var(--shadow-soft);
  transition:transform .18s ease-out;
}
.sb-skip:focus{transform:translateY(0)}

/* ---------- 4. 页头：悬浮胶囊浮岛 ---------- */
.sb-header{
  position:fixed;inset:0 0 auto;z-index:60;
  padding:12px clamp(10px,3vw,26px) 0;
  pointer-events:none;
}
.sb-header__inner{
  position:relative;
  pointer-events:auto;
  max-width:var(--shell-w);
  margin-inline:auto;
  display:flex;align-items:center;gap:clamp(10px,2vw,20px);
  padding:9px clamp(10px,1.8vw,18px);
  border-radius:999px;
}
.sb-header__inner::before{
  content:"";position:absolute;inset:0;z-index:0;
  border-radius:inherit;
  background:linear-gradient(120deg,rgba(252,250,244,.88),rgba(227,231,241,.74));
  border:1px solid var(--line-ink);
  box-shadow:0 10px 30px rgba(16,26,56,.10);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
  backdrop-filter:blur(14px) saturate(1.15);
  transition:background .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.sb-header[data-scrolled] .sb-header__inner{padding-block:5px}
.sb-header[data-scrolled] .sb-header__inner::before{
  background:linear-gradient(120deg,rgba(252,250,244,.96),rgba(227,231,241,.9));
  border-color:rgba(27,42,85,.22);
  box-shadow:0 8px 22px rgba(16,26,56,.16);
}

.sb-brand,.sb-navtoggle,.sb-nav{position:relative;z-index:1}

.sb-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;color:var(--indigo)}
.sb-brand__mark{
  display:grid;place-items:center;
  width:38px;height:38px;border-radius:11px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--copper);
  background:linear-gradient(150deg,var(--indigo),var(--indigo-deep));
  border:1px solid rgba(185,138,60,.55);
}
.sb-brand__text{display:flex;flex-direction:column;line-height:1.25}
.sb-brand__name{font-family:var(--font-serif);font-weight:700;font-size:1.06rem;letter-spacing:.01em}
.sb-brand__line{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--slate);white-space:nowrap}

.sb-navtoggle{display:none;align-items:center;gap:9px;flex:0 0 auto;margin-left:auto;
  padding:8px 14px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line-ink);color:var(--indigo);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.sb-navtoggle__bars{position:relative;width:18px;height:2px;background:currentColor;border-radius:2px}
.sb-navtoggle__bars::before,.sb-navtoggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s ease-out,top .2s ease-out}
.sb-navtoggle__bars::before{top:-6px}
.sb-navtoggle__bars::after{top:6px}
.sb-navtoggle[aria-expanded="true"] .sb-navtoggle__bars{background:transparent}
.sb-navtoggle[aria-expanded="true"] .sb-navtoggle__bars::before{top:0;transform:rotate(45deg)}
.sb-navtoggle[aria-expanded="true"] .sb-navtoggle__bars::after{top:0;transform:rotate(-45deg)}

.sb-nav{display:flex;align-items:center;gap:clamp(8px,1.4vw,16px);margin-left:auto}
.sb-nav__list{display:flex;align-items:center;gap:2px;list-style:none;padding:0}
.sb-nav__item{flex:0 0 auto}
.sb-nav__link{
  display:block;padding:7px 11px;border-radius:999px;
  font-size:14.5px;line-height:1.2;color:var(--indigo);text-decoration:none;
  border:1px solid transparent;
  transition:background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.sb-nav__link:hover{background:rgba(227,231,241,.92);border-color:var(--line-gold);color:var(--brick)}
.sb-nav__link[aria-current="page"]{background:var(--indigo);border-color:var(--indigo);color:var(--card);font-weight:500}
.sb-nav__aux{display:none}
.sb-nav__cta{display:flex;align-items:center;gap:8px}

/* ---------- 5. 按钮 ---------- */
.sb-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:999px;
  font-family:var(--font-sans);font-size:14.5px;font-weight:500;line-height:1;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.sb-btn:hover{transform:translateY(-1px)}
.sb-btn--solid{background:var(--indigo);border-color:var(--indigo);color:var(--card);box-shadow:0 6px 16px rgba(27,42,85,.20)}
.sb-btn--solid:hover{background:var(--indigo-deep)}
.sb-btn--ghost{background:rgba(252,250,244,.6);border-color:rgba(27,42,85,.32);color:var(--indigo)}
.sb-btn--ghost:hover{border-color:var(--copper);color:var(--brick);background:var(--card)}
.sb-btn--brick{background:var(--brick);border-color:var(--brick);color:#FFF8F5}
.sb-btn--brick:hover{background:#8E2F20}
.sb-btn--sm{padding:7px 13px;font-size:13px}

/* ---------- 6. 排版 ---------- */
.sb-eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brick);
}
.sb-eyebrow::before{content:"";width:24px;height:1px;background:var(--copper)}
.sb-h1{font-family:var(--font-serif);font-weight:800;font-size:clamp(2.4rem,6vw,5.2rem);line-height:1.02;letter-spacing:-.01em;color:var(--indigo)}
.sb-h2{font-family:var(--font-serif);font-weight:700;font-size:clamp(1.6rem,3.2vw,2.5rem);line-height:1.15;letter-spacing:-.005em;color:var(--indigo)}
.sb-h3{font-family:var(--font-serif);font-weight:700;font-size:clamp(1.15rem,2vw,1.5rem);color:var(--indigo)}
.sb-lead{font-size:clamp(1.02rem,1.5vw,1.2rem);line-height:1.7;color:var(--slate);max-width:34em}
.sb-text{font-size:17px;line-height:1.78;max-width:34em;color:var(--ink)}
.sb-text p:last-child{margin-bottom:0}
.sb-note{font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--slate);line-height:1.7}
.sb-mono{font-family:var(--font-mono);letter-spacing:.02em}

/* ---------- 7. 标签 / 徽记 ---------- */
.sb-tag{
  display:inline-flex;align-items:center;padding:3px 9px;border-radius:4px;
  border:1px solid rgba(27,42,85,.28);background:rgba(252,250,244,.7);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--indigo);
}
.sb-tag--brick{border-color:rgba(166,58,40,.42);background:var(--brick-soft);color:var(--brick)}
.sb-badge{
  display:inline-flex;align-items:center;padding:3px 8px;border-radius:3px;
  background:var(--indigo);color:var(--card);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
}
.sb-stamp{
  display:inline-flex;align-items:center;padding:4px 9px;border-radius:4px;
  border:1px solid rgba(185,138,60,.6);color:var(--copper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
}

/* ---------- 8. 索引卡 ---------- */
.sb-card{
  position:relative;display:flex;flex-direction:column;gap:10px;
  padding:20px 20px 16px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line-ink);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.sb-card::before{
  content:"";position:absolute;top:16px;left:-1px;width:4px;height:26px;border-radius:0 3px 3px 0;
  background:var(--copper);transition:background-color .2s ease-out,height .2s ease-out;
}
.sb-card:hover{transform:translateY(-4px);border-color:var(--line-gold);box-shadow:var(--shadow-lift)}
.sb-card:hover::before{background:var(--brick);height:42px}
.sb-card__code{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--copper);align-self:flex-end}
.sb-card__title{font-family:var(--font-serif);font-weight:700;font-size:1.2rem;margin:0;color:var(--indigo)}
.sb-card__meta{font-size:13.5px;color:var(--slate);margin:0}
.sb-card__body{font-size:14.5px;color:var(--ink);margin:0}
.sb-card__body p:last-child{margin-bottom:0}
.sb-card__foot{
  margin-top:auto;padding-top:10px;border-top:1px solid var(--line-gold);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;color:var(--slate);
}

/* ---------- 9. 图像容器 ---------- */
.sb-media{display:flex;flex-direction:column;gap:10px}
.sb-media__frame{
  position:relative;width:100%;aspect-ratio:4/3;overflow:hidden;
  border-radius:var(--radius);
  background:linear-gradient(160deg,var(--mist),var(--card));
  border:1px solid var(--line-ink);
}
.sb-media__frame > img{width:100%;height:100%;object-fit:cover}
.sb-media__ph{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--slate);
  background-image:repeating-linear-gradient(135deg,rgba(27,42,85,.05) 0 1px,transparent 1px 10px);
}
.sb-media__cap{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;color:var(--slate)}
.sb-media--wide .sb-media__frame{aspect-ratio:16/9}
.sb-media--square .sb-media__frame{aspect-ratio:1/1}
.sb-media--tall .sb-media__frame{aspect-ratio:3/4}

/* ---------- 10. 规格对照表 ---------- */
.sb-table-wrap{overflow-x:auto;border:1px solid var(--line-ink);border-radius:var(--radius);background:var(--card)}
.sb-table{width:100%;min-width:660px;border-collapse:collapse;font-size:14.5px}
.sb-table th,.sb-table td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid rgba(185,138,60,.34)}
.sb-table thead th{
  font-family:var(--font-mono);font-size:11.5px;font-weight:400;letter-spacing:.08em;
  color:var(--indigo);background:rgba(227,231,241,.6);white-space:nowrap;
}
.sb-table tbody tr:last-child td{border-bottom:0}
.sb-table tbody tr:hover td{background:rgba(240,220,214,.42)}

/* ---------- 11. 折叠清单 ---------- */
.sb-rows{list-style:none;padding:0;border-top:1px solid var(--line-ink)}
.sb-row{border-bottom:1px solid var(--line-ink-soft);transition:background-color .2s ease-out}
.sb-row[data-open]{background:var(--card)}
.sb-row__head{display:flex;align-items:baseline;gap:14px;width:100%;padding:14px 4px;text-align:left;cursor:pointer}
.sb-row__num{flex:0 0 auto;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--copper)}
.sb-row__title{font-weight:500;color:var(--indigo)}
.sb-row__toggle{margin-left:auto;flex:0 0 auto;font-family:var(--font-mono);font-size:12px;color:var(--slate)}
.sb-row__toggle::after{content:"＋"}
.sb-row[data-open] .sb-row__toggle::after{content:"－"}
.sb-row[data-open] .sb-row__toggle{color:var(--brick)}
.sb-row__body{max-height:0;overflow:hidden;transition:max-height .24s ease-out}
.sb-row[data-open] .sb-row__body{max-height:1200px}
.sb-row__inner{padding:0 4px 18px;color:var(--slate);font-size:14.5px}

/* ---------- 12. 筛选条 ---------- */
.sb-filters{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.sb-filter{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--slate)}
.sb-filter__chip{
  padding:6px 13px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(27,42,85,.22);background:rgba(252,250,244,.72);color:var(--indigo);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.sb-filter__chip:hover{border-color:var(--copper);color:var(--brick)}
.sb-filter__chip[aria-pressed="true"]{background:var(--indigo);border-color:var(--indigo);color:var(--card)}

/* ---------- 13. 年份横轴 ---------- */
.sb-axis{
  display:flex;align-items:stretch;overflow-x:auto;padding:14px 0 12px;
  border-top:1px solid var(--line-ink);border-bottom:1px solid var(--line-ink);
}
.sb-axis__item{
  position:relative;flex:0 0 auto;display:flex;flex-direction:column;gap:6px;
  padding:0 16px;text-decoration:none;color:var(--indigo);
  border-left:1px solid var(--line-gold);
  transition:color .18s ease-out;
}
.sb-axis__item:first-child{border-left:0}
.sb-axis__year{font-family:var(--font-mono);font-size:20px;letter-spacing:.02em}
.sb-axis__label{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;color:var(--slate);white-space:nowrap}
.sb-axis__item::after{content:"";position:absolute;left:16px;right:16px;bottom:-13px;height:3px;background:transparent;transition:background-color .18s ease-out}
.sb-axis__item:hover{color:var(--brick)}
.sb-axis__item[aria-current="true"]{color:var(--brick)}
.sb-axis__item[aria-current="true"]::after{background:var(--brick)}
.sb-axis__item[aria-current="true"] .sb-axis__label{color:var(--brick)}

/* ---------- 14. 时间轴 ---------- */
.sb-timeline{list-style:none;padding:0 0 0 26px;border-left:1px solid rgba(27,42,85,.24)}
.sb-timeline__item{position:relative;padding-bottom:26px}
.sb-timeline__item::before{
  content:"";position:absolute;left:-32px;top:9px;width:11px;height:11px;border-radius:50%;
  background:var(--card);border:2px solid var(--copper);
}
.sb-timeline__item[aria-current="true"]::before{background:var(--brick);border-color:var(--brick)}
.sb-timeline__year{font-family:var(--font-mono);font-size:20px;letter-spacing:.02em;color:var(--indigo)}
.sb-timeline__item[aria-current="true"] .sb-timeline__year{color:var(--brick)}
.sb-timeline__text{margin:6px 0 0;color:var(--slate);font-size:14.5px;max-width:34em}

/* ---------- 15. 问答 ---------- */
.sb-faq{display:grid;gap:10px}
.sb-faq__item{background:var(--card);border:1px solid var(--line-ink);border-radius:12px}
.sb-faq__q{
  display:flex;gap:12px;align-items:baseline;padding:16px 18px;cursor:pointer;
  font-weight:500;color:var(--indigo);list-style:none;
}
.sb-faq__q::-webkit-details-marker{display:none}
.sb-faq__q::after{content:"＋";margin-left:auto;font-family:var(--font-mono);color:var(--copper)}
.sb-faq__item[open] .sb-faq__q::after{content:"－"}
.sb-faq__item[open] .sb-faq__q{color:var(--brick)}
.sb-faq__a{padding:0 18px 18px;color:var(--slate);font-size:14.5px}
.sb-faq__a p:last-child{margin-bottom:0}

/* ---------- 16. 索引条 / 面包屑 ---------- */
.sb-rail{position:sticky;top:106px;align-self:start;padding-left:14px;border-left:1px solid var(--line-gold)}
.sb-rail__list{list-style:none;padding:0;display:grid;gap:4px}
.sb-rail__link{display:block;padding:4px 0;font-size:13.5px;color:var(--slate);text-decoration:none}
.sb-rail__link:hover{color:var(--indigo)}
.sb-rail__link[aria-current="true"]{color:var(--brick);font-weight:500}

.sb-breadcrumb{padding-block:18px 0}
.sb-breadcrumb__list{
  display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--slate);
}
.sb-breadcrumb__sep{color:var(--copper)}
.sb-breadcrumb__link{color:var(--slate);text-decoration:none}
.sb-breadcrumb__link:hover{color:var(--brick)}
.sb-breadcrumb__item[aria-current="page"]{color:var(--indigo)}

/* ---------- 17. 提示块 / 行动区 ---------- */
.sb-callout{
  padding:18px 20px;border-radius:12px;
  background:rgba(227,231,241,.62);border-left:3px solid var(--indigo);color:var(--ink);
  font-size:15px;
}
.sb-callout p:last-child{margin-bottom:0}
.sb-callout--brick{background:var(--brick-soft);border-left-color:var(--brick)}
.sb-callout--brick p{color:#5E2418}

.sb-cta-band{
  display:grid;gap:20px;padding:clamp(24px,4vw,42px);border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--indigo-deep),var(--indigo) 62%,#26365F);
  border:1px solid rgba(185,138,60,.45);color:var(--card);
}
.sb-cta-band__text{margin:0;color:rgba(245,241,231,.86);max-width:34em;font-size:15.5px}
.sb-cta-band__text strong{color:#FFF;font-weight:600}
.sb-cta-band__actions{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- 18. 网格 ---------- */
.sb-grid{display:grid;gap:var(--sb-gap);grid-template-columns:1fr}
@media (min-width:900px){
  .sb-grid--2{grid-template-columns:repeat(2,1fr)}
  .sb-grid--3{grid-template-columns:repeat(3,1fr)}
  .sb-grid--7-5{grid-template-columns:7fr 5fr}
  .sb-grid--5-7{grid-template-columns:5fr 7fr}
  .sb-grid--4-8{grid-template-columns:4fr 8fr}
  .sb-cta-band{grid-template-columns:1.5fr 1fr;align-items:center}
}

/* ---------- 19. 阅读进度 ---------- */
.sb-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:90;
  background:rgba(27,42,85,.08);pointer-events:none;
}
.sb-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--copper),var(--brick));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .1s linear;
}

/* ---------- 20. 进场 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease-out,transform .5s ease-out}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 21. 页脚 ---------- */
.sb-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,var(--indigo-deep) 0%,#0C1428 58%,#080D1C 100%);
  color:rgba(245,241,231,.82);
  overflow:hidden;
}
.sb-footer::before{
  content:"";position:absolute;inset:0 0 auto;height:3px;
  background:linear-gradient(90deg,var(--brick),var(--copper) 38%,rgba(185,138,60,0) 82%);
}
.sb-footer::after{
  content:"";position:absolute;right:-10%;bottom:-40%;width:52%;height:120%;
  background:radial-gradient(circle at 70% 70%,rgba(185,138,60,.16),rgba(185,138,60,0) 68%);
  pointer-events:none;
}
.sb-footer__inner{position:relative;z-index:1;max-width:var(--shell-w);margin-inline:auto;padding:clamp(40px,6vw,74px) clamp(16px,4vw,40px) 24px}
.sb-footer__grid{display:grid;gap:clamp(26px,4vw,48px);grid-template-columns:1fr}
.sb-footer__brand{max-width:32em}
.sb-footer__wordmark{font-family:var(--font-serif);font-weight:800;font-size:1.55rem;letter-spacing:.02em;color:var(--card);margin:0}
.sb-footer__tagline{margin:12px 0 0;font-size:14.5px;line-height:1.7;color:rgba(245,241,231,.7);max-width:30em}
.sb-footer__meta{
  list-style:none;padding:0;margin:18px 0 0;display:grid;gap:7px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.03em;color:rgba(245,241,231,.72);
}
.sb-footer__note{margin:16px 0 0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:rgba(185,138,60,.92)}
.sb-footer__col{min-width:0}
.sb-footer__title{
  margin:0 0 14px;font-family:var(--font-mono);font-weight:400;font-size:11.5px;
  letter-spacing:.16em;color:var(--copper);
}
.sb-footer__links{list-style:none;padding:0;display:grid;gap:9px}
.sb-footer__link{
  display:inline-block;padding-bottom:2px;font-size:14.5px;
  color:rgba(245,241,231,.78);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.sb-footer__link:hover{color:var(--card);border-bottom-color:var(--copper)}
.sb-footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;align-items:center;
  margin-top:clamp(28px,4vw,46px);padding-top:18px;
  border-top:1px solid rgba(185,138,60,.34);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:rgba(245,241,231,.6);
}
.sb-footer__icp,.sb-footer__copyright{margin:0}

/* ---------- 22. 响应式：平板 / 桌面 ---------- */
@media (min-width:900px){
  .sb-footer__grid{grid-template-columns:1.6fr .9fr 1.1fr .7fr}
}
@media (min-width:881px) and (max-width:1120px){
  .sb-nav__cta .sb-btn--ghost{display:none}
  .sb-nav__link{padding:7px 9px;font-size:13.5px}
}
@media (max-width:880px){
  .sb-brand__line{display:none}
  .sb-navtoggle{display:inline-flex}

  .sb-nav{
    position:fixed;left:12px;right:12px;bottom:12px;z-index:70;
    display:grid;gap:12px;margin:0;padding:16px 16px 18px;
    border-radius:20px;
    background:linear-gradient(160deg,var(--card),var(--mist));
    border:1px solid rgba(27,42,85,.18);
    box-shadow:0 24px 60px rgba(16,26,56,.3);
    transform:translateY(calc(100% + 28px));
    opacity:0;visibility:hidden;
    transition:transform .28s ease-out,opacity .28s ease-out,visibility .28s linear;
  }
  .sb-nav[data-open]{transform:translateY(0);opacity:1;visibility:visible}
  .sb-nav__list{
    flex-wrap:nowrap;overflow-x:auto;gap:6px;padding-bottom:6px;
    -webkit-overflow-scrolling:touch;scrollbar-width:thin;
  }
  .sb-nav__item{flex:0 0 auto}
  .sb-nav__link{padding:8px 14px;border:1px solid var(--line-ink);background:rgba(252,250,244,.7);white-space:nowrap}
  .sb-nav__aux{
    display:block;margin:0;font-family:var(--font-mono);font-size:11.5px;
    letter-spacing:.06em;color:var(--slate);
  }
  .sb-nav__cta{display:grid;grid-template-columns:1fr 1fr;gap:8px}
}
@media (max-width:560px){
  .sb-nav__cta{grid-template-columns:1fr}
  .sb-header{padding-top:8px}
  .sb-brand__mark{width:34px;height:34px;font-size:12px}
  .sb-main{padding-top:clamp(84px,13vh,104px)}
}

/* ---------- 23. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .sb-btn:hover,.sb-card:hover{transform:none}
}