/* =========================================================
   优乐服务 · 共享站点样式 /assets/site.css
   暖纸底 + 深靛蓝浮岛 + 海风路线图语言
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#1C222B;
  --ink-70:rgba(28,34,43,.72);
  --ink-50:rgba(28,34,43,.52);
  --paper:#F6EFE2;
  --paper-deep:#EFE3CE;
  --indigo:#14264A;
  --indigo-soft:#1E3560;
  --sea:#0B7FA6;
  --sea-deep:#075E7C;
  --coral:#F26A4B;
  --coral-deep:#B8432B;
  --palm:#2C9C6E;
  --salt:#DCEEF0;
  --sand:#D9B36C;
  --deep:#0F1B2D;
  --glass:rgba(255,255,255,.72);
  --glass-strong:rgba(255,255,255,.86);
  --line:rgba(20,38,74,.14);
  --line-soft:rgba(20,38,74,.08);

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Cascadia Mono","Source Code Pro",Consolas,"Liberation Mono",monospace;

  --step-12:12px;
  --step-14:14px;
  --step-16:16px;
  --step-18:18px;
  --step-22:22px;
  --step-28:28px;
  --step-36:36px;

  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --radius-pill:999px;

  --shadow-soft:0 30px 70px -50px rgba(20,38,74,.62);
  --shadow-pill:0 20px 44px -30px rgba(20,38,74,.58);

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --gap:clamp(16px,2.4vw,26px);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:3px solid var(--indigo);outline-offset:3px;border-radius:4px;}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:clamp(16px,.42vw + 14.4px,18px);
  line-height:1.85;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(70% 46% at 100% 0%,rgba(11,127,166,.11),transparent 62%),
    radial-gradient(52% 42% at 0% 6%,rgba(242,106,75,.09),transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.01em;
  color:var(--indigo);
}
h1{font-size:clamp(32px,4.6vw,56px);line-height:1.12;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,36px);}
h3{font-size:clamp(19px,2vw,24px);}
h4{font-size:clamp(17px,1.6vw,20px);}
strong{font-weight:700;color:var(--indigo);}
::selection{background:rgba(242,106,75,.28);color:var(--indigo);}

/* ---------- 4. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:820px;}
.section{padding-block:clamp(48px,7vw,96px);}
.page-shell{padding-block:clamp(28px,4.6vw,56px) clamp(64px,8vw,112px);}
.layout-split{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(26px,4vw,48px);}
@media (min-width:1024px){
  .layout-split{grid-template-columns:minmax(0,1fr) 320px;}
}
.grid{display:grid;gap:var(--gap);}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(196px,1fr));}

/* ---------- 5. 文字工具 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--sea-deep);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--coral);border-radius:2px;}
.lede{
  font-size:clamp(17px,1.4vw,20px);
  line-height:1.78;
  color:var(--ink-70);
  max-width:36em;
}
.prose{max-width:62ch;}
.prose > * + *{margin-top:1.1em;}
.prose h2,.prose h3{margin-top:1.8em;}
.prose a{color:var(--sea-deep);text-decoration:underline;text-underline-offset:3px;}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn--primary{background:var(--indigo);color:#F6EFE2;box-shadow:0 16px 32px -22px rgba(20,38,74,.95);}
.btn--primary:hover{background:var(--indigo-soft);}
.btn--sea{background:var(--sea);color:#F4FDFF;box-shadow:0 16px 32px -22px rgba(11,127,166,.95);}
.btn--sea:hover{background:var(--sea-deep);}
.btn--coral{background:var(--coral);color:#2B0F08;box-shadow:0 16px 32px -22px rgba(242,106,75,.95);}
.btn--coral:hover{background:#E85B3B;}
.btn--ghost{background:rgba(255,255,255,.5);border-color:var(--line);color:var(--indigo);}
.btn--ghost:hover{background:var(--salt);border-color:rgba(11,127,166,.35);}

/* ---------- 7. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border-radius:6px;
  border:1px solid rgba(11,127,166,.22);
  background:var(--salt);
  color:var(--sea-deep);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.5;
  white-space:nowrap;
}
.tag--coral{background:rgba(242,106,75,.14);border-color:rgba(242,106,75,.38);color:var(--coral-deep);}
.tag--palm{background:rgba(44,156,110,.13);border-color:rgba(44,156,110,.34);color:#1E6E4C;}
.tag--palm::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--palm);}
.tag--sand{background:rgba(217,179,108,.2);border-color:rgba(217,179,108,.55);color:#7A5A1F;}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink-50);
  margin-bottom:20px;
}
.breadcrumbs a{
  color:var(--sea-deep);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .18s ease;
}
.breadcrumbs a:hover{border-bottom-color:rgba(11,127,166,.45);}
.breadcrumbs__sep{color:var(--sand);}

/* ---------- 9. 堆叠面板 ---------- */
.stack-panel{
  position:relative;
  padding:clamp(22px,3.2vw,42px);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  background:var(--glass-strong);
  -webkit-backdrop-filter:blur(14px) saturate(1.1);
  backdrop-filter:blur(14px) saturate(1.1);
  box-shadow:var(--shadow-soft);
}
.stack-panel + .stack-panel{margin-top:clamp(18px,2.6vw,32px);}
.panel-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 16px;
  margin-bottom:18px;
}
.panel-head__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--coral-deep);
  padding-bottom:2px;
  border-bottom:2px solid var(--sand);
}
.panel-head__title{
  font-size:clamp(21px,2.6vw,30px);
  font-weight:800;
  line-height:1.3;
  color:var(--indigo);
}

/* ---------- 10. 横向主题带 ---------- */
.theme-band{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding:clamp(18px,2.8vw,28px) clamp(20px,3.4vw,38px);
  border-radius:var(--radius-m);
  overflow:hidden;
  isolation:isolate;
  color:rgba(246,239,226,.9);
  background:
    radial-gradient(circle at 10% 132%,rgba(242,106,75,.55),transparent 46%),
    radial-gradient(circle at 90% -34%,rgba(44,156,110,.42),transparent 50%),
    linear-gradient(118deg,#14264A 0%,#1E3560 64%,#075E7C 100%);
}
.theme-band::after{
  content:"";
  position:absolute;
  right:-46px;
  top:50%;
  width:210px;
  height:210px;
  transform:translateY(-50%);
  border:1px dashed rgba(217,179,108,.45);
  border-radius:50%;
  pointer-events:none;
}
.theme-band > *{position:relative;z-index:1;}
.theme-band__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--sand);
}
.theme-band__title{
  font-size:clamp(18px,2.1vw,24px);
  font-weight:800;
  line-height:1.35;
  color:#FBF6EC;
}
.theme-band + .stack-panel{margin-top:clamp(18px,2.6vw,32px);}
.stack-panel + .theme-band{margin-top:clamp(18px,2.6vw,32px);}

/* ---------- 11. 右侧索引栏 ---------- */
.index-rail{
  position:sticky;
  top:98px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(1.1);
  backdrop-filter:blur(14px) saturate(1.1);
  box-shadow:0 24px 56px -46px rgba(20,38,74,.7);
}
.index-rail__label{
  display:block;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ink-50);
}
.index-rail a{
  display:block;
  padding:8px 12px;
  border-left:2px solid transparent;
  border-radius:8px;
  font-size:14px;
  line-height:1.6;
  color:var(--indigo);
  text-decoration:none;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.index-rail a:hover{background:var(--salt);border-left-color:var(--sea);}
.index-rail a[aria-current]{
  background:rgba(217,179,108,.2);
  border-left-color:var(--sand);
  font-weight:600;
  color:var(--indigo);
}

/* ---------- 12. 图像容器基础 ---------- */
.figure{display:flex;flex-direction:column;gap:10px;margin:0;}
.figure__media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  background-color:var(--indigo);
  background-image:
    radial-gradient(120% 90% at 10% 6%,rgba(11,127,166,.55),transparent 56%),
    radial-gradient(96% 82% at 90% 96%,rgba(242,106,75,.5),transparent 60%),
    linear-gradient(158deg,#14264A 0%,#0F1B2D 100%);
}
.figure__media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.55;
}
.figure__media > img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__media--wide{aspect-ratio:21 / 9;}
.figure__media--tall{aspect-ratio:4 / 5;}
.figure__caption{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.03em;
  line-height:1.7;
  color:var(--ink-50);
}

/* ---------- 13. 分段切换（标签页） ---------- */
.tabs{margin-top:clamp(18px,2.8vw,28px);}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  width:fit-content;
  max-width:100%;
  padding:5px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(220,238,240,.62);
}
.tabs__tab{
  appearance:none;
  border:0;
  background:transparent;
  padding:9px 18px;
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--ink-70);
  cursor:pointer;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.tabs__tab:hover{background:rgba(255,255,255,.75);color:var(--indigo);}
.tabs__tab[aria-selected="true"]{
  background:var(--indigo);
  color:#F6EFE2;
  box-shadow:0 12px 24px -18px rgba(20,38,74,.95);
}
.tabs__panel{padding-top:22px;animation:tabIn .32s ease both;}
.tabs__panel[hidden]{display:none;}
@keyframes tabIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* ---------- 14. 显影 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s ease,transform .5s ease;
  will-change:opacity,transform;
}
.has-js [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* ---------- 15. 头部 ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:10px;
  z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 22px;
  border-radius:var(--radius-pill);
  background:var(--indigo);
  color:#F6EFE2;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translate(-50%,0);}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:18px var(--gutter) 14px;
  background:rgba(246,239,226,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:padding .28s ease,background .28s ease;
}
.header-shell{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
}
.nav-pill{
  display:flex;
  align-items:center;
  gap:14px;
  padding:9px 10px 9px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(1.25);
  backdrop-filter:blur(16px) saturate(1.25);
  box-shadow:var(--shadow-pill);
  transition:padding .28s ease,box-shadow .28s ease,background .28s ease;
}
.site-header[data-scrolled]{padding-top:9px;padding-bottom:8px;}
.site-header[data-scrolled] .nav-pill{
  padding:6px 8px 6px 12px;
  background:rgba(255,255,255,.9);
  box-shadow:0 14px 30px -26px rgba(20,38,74,.85);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:3px 6px 3px 0;
  text-decoration:none;
  color:var(--indigo);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:11px;
  background:linear-gradient(150deg,var(--indigo) 0%,var(--sea) 100%);
  color:#F6EFE2;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  line-height:1;
}
.brand__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand__sub{
  padding-left:9px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--sea-deep);
  white-space:nowrap;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:6px;
  margin-right:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:500;
  line-height:1.4;
  color:var(--indigo);
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.nav-link:hover{background:var(--salt);}
.nav-link[aria-current="page"]{
  color:var(--sea-deep);
  background:rgba(11,127,166,.1);
  font-weight:600;
}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--coral);
  transform:translateX(-50%);
}

.nav-dual{display:flex;align-items:center;gap:8px;}
.dual-link{
  display:inline-flex;
  align-items:center;
  padding:7px 13px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.4;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.dual-link--new{
  color:var(--sea-deep);
  border-color:rgba(11,127,166,.4);
  background:rgba(11,127,166,.09);
}
.dual-link--new:hover{background:rgba(11,127,166,.2);border-color:var(--sea);}
.dual-link--biz{
  color:var(--coral-deep);
  border-color:rgba(242,106,75,.46);
  background:rgba(242,106,75,.11);
}
.dual-link--biz:hover{background:var(--coral);border-color:var(--coral);color:#2B0F08;}

.version-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  flex:0 0 auto;
  padding:6px 10px;
  border-radius:8px;
  background:var(--indigo);
  color:#F6EFE2;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.4;
}
.version-badge::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--palm);
  box-shadow:0 0 0 3px rgba(44,156,110,.28);
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  padding:0;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.72);
  cursor:pointer;
  transition:background .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:var(--salt);}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--indigo);
  transition:transform .24s ease,opacity .18s ease;
}
.nav-toggle__bars{position:relative;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
}
.nav-toggle__bars::before{top:-6px;}
.nav-toggle__bars::after{top:6px;}
.site-header[data-nav-open] .nav-toggle__bars{background:transparent;}
.site-header[data-nav-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);}
.site-header[data-nav-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);}

.nav-panel{display:none;}

/* ---------- 16. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(42px,6vw,74px) 0 26px;
  background:var(--deep);
  color:rgba(246,239,226,.82);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:6px;
  background:linear-gradient(90deg,
    var(--sea) 0 22%,
    var(--coral) 22% 34%,
    var(--sand) 34% 48%,
    var(--palm) 48% 60%,
    var(--indigo-soft) 60% 100%);
}
.footer-shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4vw,44px);
}
@media (min-width:900px){
  .footer-grid{grid-template-columns:1.45fr 1fr 1.35fr;}
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px;}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(22px,2.4vw,28px);
  font-weight:800;
  letter-spacing:.02em;
  color:#F6EFE2;
}
.footer-brand__note{
  max-width:32em;
  font-size:14px;
  line-height:1.9;
  color:rgba(246,239,226,.72);
}
.footer-brand__cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 20px;
  border:1px solid rgba(220,238,240,.4);
  border-radius:var(--radius-pill);
  color:#DCEEF0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  text-decoration:none;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.footer-brand__cta:hover{background:var(--sea);border-color:var(--sea);color:#F4FDFF;}
.region-mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--sand);
}
.region-mark::before{content:"";width:26px;height:1px;background:var(--sand);}
.region-mark::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--coral);}

.footer-col{display:flex;flex-direction:column;gap:12px;}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--sand);
}
.footer-links{display:grid;gap:10px;}
.footer-links a{
  font-size:14px;
  line-height:1.6;
  color:rgba(246,239,226,.78);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-links a:hover{color:#FFFFFF;}
.footer-links a:hover::after{content:" →";color:var(--coral);}

.contact-line{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-size:14px;
  line-height:1.7;
  color:rgba(246,239,226,.82);
}
.contact-line__key{
  flex:0 0 auto;
  min-width:38px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--salt);
  opacity:.8;
}
.footer-note{
  margin-top:6px;
  padding-top:12px;
  border-top:1px solid rgba(246,239,226,.14);
  font-size:13px;
  line-height:1.85;
  color:rgba(246,239,226,.6);
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  margin-top:clamp(30px,4vw,46px);
  padding-top:20px;
  border-top:1px solid rgba(246,239,226,.16);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:rgba(246,239,226,.6);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:6px 18px;}
.footer-legal a{
  color:rgba(220,238,240,.86);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .18s ease,color .18s ease;
}
.footer-legal a:hover{color:#FFFFFF;border-bottom-color:var(--coral);}
.footer-base__meta,
.footer-base__icp{margin:0;}

/* ---------- 17. 平板与移动导航 ---------- */
@media (max-width:1119px){
  .nav-list{display:none;}
  .nav-dual{display:none;}
  .nav-toggle{display:inline-flex;}
  .version-badge{margin-left:auto;}
  .nav-panel{
    display:block;
    max-height:0;
    margin-top:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    border:1px solid transparent;
    border-radius:var(--radius-l);
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(16px) saturate(1.2);
    backdrop-filter:blur(16px) saturate(1.2);
    transition:max-height .34s cubic-bezier(.4,0,.2,1),opacity .24s ease,visibility .24s ease,margin-top .24s ease;
  }
  .nav-panel[data-open]{
    max-height:min(72vh,540px);
    margin-top:10px;
    overflow-y:auto;
    opacity:1;
    visibility:visible;
    border-color:var(--line);
    box-shadow:var(--shadow-soft);
  }
}

.nav-panel__label{
  margin:0;
  padding:16px 20px 8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ink-50);
}
.nav-panel__dual{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding:0 20px 6px;
}
.nav-panel__list{display:grid;gap:2px;padding:0 10px 6px;}
.panel-link{
  display:block;
  padding:11px 12px;
  border-radius:10px;
  font-size:15px;
  line-height:1.5;
  color:var(--indigo);
  text-decoration:none;
  transition:background .18s ease,color .18s ease;
}
.panel-link:hover{background:var(--salt);}
.panel-link[aria-current="page"]{
  background:rgba(11,127,166,.13);
  color:var(--sea-deep);
  font-weight:600;
}
.nav-panel__meta{
  margin:0;
  padding:10px 20px 20px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--ink-50);
}

@media (max-width:767px){
  .site-header{
    position:static;
    padding:0;
    background:none;
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .header-shell{max-width:none;}
  .nav-pill{
    position:fixed;
    left:12px;
    right:12px;
    bottom:12px;
    z-index:120;
    gap:10px;
    padding:7px 8px 7px 12px;
    border-radius:20px;
    background:rgba(255,255,255,.9);
    box-shadow:0 -12px 36px -20px rgba(15,27,45,.6);
  }
  .site-header[data-scrolled] .nav-pill{padding:7px 8px 7px 12px;}
  .brand__mark{width:30px;height:30px;border-radius:9px;font-size:13px;}
  .brand__name{font-size:16px;}
  .brand__sub{display:none;}
  .nav-panel{
    position:fixed;
    left:12px;
    right:12px;
    bottom:84px;
    z-index:119;
    margin-top:0;
    border-radius:20px;
    box-shadow:0 -18px 46px -26px rgba(15,27,45,.55);
  }
  .nav-panel[data-open]{
    margin-top:0;
    max-height:min(62vh,440px);
  }
  body{padding-bottom:92px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

/* ---------- 18. 可访问性与降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .has-js [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
}
@media print{
  .site-header,.site-footer,.tabs__list{display:none;}
  body{background:#fff;color:#000;}
}