/* ============================================================
   10博德尔指南 · 共享样式 /assets/site.css
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html,body,div,span,h1,h2,h3,h4,h5,h6,p,ul,ol,li,dl,dt,dd,figure,blockquote,header,footer,nav,main,section,article,aside,button,input,textarea,select,table,th,td{margin:0;padding:0;}
ul,ol{list-style:none;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
img,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
::selection{background:rgba(47,227,208,.28);color:#F3F6F4;}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#061826;
  --panel:#0C2A3E;
  --band:#123F55;
  --cyan:#2FE3D0;
  --amber:#FFB65C;
  --sage:#9DBBA8;
  --porcelain:#F3F6F4;
  --silver:#B9CBD6;
  --line:#2A4A5E;
  --muted:#6E8A99;

  --rail-w:96px;
  --bar-h:64px;
  --shell:min(1280px, 100% - 64px);

  --r-lg:28px;
  --r-md:20px;
  --r-sm:12px;
  --r-pill:999px;

  --font-display:'PingFang SC','HarmonyOS Sans SC','Source Han Sans SC',system-ui,sans-serif;
  --font-body:'PingFang SC','Source Han Sans SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,'Courier New',monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. Base typography ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--silver);
  background:var(--ink);
  min-height:100vh;
  padding:var(--bar-h) 0 0 var(--rail-w);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  color:var(--porcelain);
}
h1{font-size:clamp(34px,5.2vw,72px);}
h2{font-size:clamp(26px,3.2vw,42px);}
h3{font-size:clamp(19px,2vw,26px);line-height:1.25;}
h4{font-size:17px;line-height:1.35;font-weight:700;}
p{max-width:68ch;}
strong{color:var(--porcelain);font-weight:700;}
small{font-size:13px;}
code{font-family:var(--font-mono);font-size:.92em;color:var(--cyan);}
.mono-tag{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--muted);
}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
#main-content:focus{outline:none;}

/* ---------- 4. Shell & sections ---------- */
.page-shell{width:var(--shell);margin-inline:auto;}
.section{padding-block:clamp(48px,6vw,88px);}
.section--tight{padding-block:clamp(32px,4vw,56px);}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:28px;
}
.section-head__title{font-size:clamp(24px,3vw,36px);}
.section-head__note{font-size:14px;line-height:1.7;color:var(--muted);max-width:46ch;max-width:46ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--cyan);}
.rule{height:1px;background:var(--line);border:0;width:100%;}

/* ---------- 5. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  font-family:var(--font-display);font-size:14px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{background:var(--cyan);color:var(--ink);}
.btn--primary:hover{background:#5CF0E0;box-shadow:0 0 0 4px rgba(47,227,208,.16);}
.btn--amber{background:var(--amber);color:var(--ink);}
.btn--amber:hover{background:#FFC77F;box-shadow:0 0 0 4px rgba(255,182,92,.16);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--silver);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--block{width:100%;}

/* ---------- 6. Skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:999;
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--cyan);color:var(--ink);
  font-family:var(--font-display);font-size:14px;font-weight:700;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0);outline-offset:2px;}

/* ---------- 7. Header / index rail ---------- */
.site-header{position:relative;z-index:100;}

.index-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:130;
  display:flex;flex-direction:column;
  background:var(--ink);
  border-right:1px solid var(--line);
}
.brand-mark{
  height:var(--bar-h);flex:0 0 auto;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  border-bottom:1px solid var(--line);
  color:var(--porcelain);
}
.brand-mark__glyph{
  font-family:var(--font-mono);font-size:20px;font-weight:700;line-height:1;
  letter-spacing:.04em;color:var(--cyan);
}
.brand-mark__word{
  font-size:11px;font-weight:600;letter-spacing:.3em;text-indent:.3em;line-height:1;
}
.brand-mark:hover .brand-mark__glyph{color:var(--amber);}

.rail-nav{
  flex:1 1 auto;display:flex;align-items:center;justify-content:center;
  padding:12px 0;overflow-y:auto;
}
.rail-nav__list{display:flex;flex-direction:column;gap:4px;width:100%;padding:0 6px;}
.rail-nav__item{width:100%;}
.rail-nav__link{
  display:flex;flex-direction:column;gap:5px;align-items:flex-start;
  padding:8px;border-radius:var(--r-sm);
  border-left:2px solid transparent;
  color:var(--silver);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.rail-nav__num{
  font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.16em;
  color:var(--muted);transition:color .18s var(--ease);
}
.rail-nav__label{font-size:12px;font-weight:600;line-height:1.3;letter-spacing:.04em;}
.rail-nav__link:hover{background:rgba(47,227,208,.08);color:var(--porcelain);border-left-color:rgba(47,227,208,.55);}
.rail-nav__link:hover .rail-nav__num{color:var(--cyan);}
.rail-nav__link[aria-current="page"]{
  background:rgba(47,227,208,.1);color:var(--cyan);
  border-left-color:var(--cyan);
}
.rail-nav__link[aria-current="page"] .rail-nav__num{color:var(--amber);}

.rail-foot{
  flex:0 0 auto;align-self:center;
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:9px;letter-spacing:.24em;
  color:var(--muted);opacity:.75;line-height:1;
}

/* ---------- 8. Status bar ---------- */
.status-bar{
  position:fixed;top:0;left:var(--rail-w);right:0;height:var(--bar-h);z-index:120;
  display:flex;align-items:center;gap:18px;
  padding:0 26px;
  background:var(--panel);
  border-bottom:1px solid var(--line);
}
.status-bar__id{display:flex;align-items:center;gap:14px;min-width:0;}
.status-bar__lockup{
  font-family:var(--font-display);font-weight:800;font-size:15px;
  letter-spacing:.02em;color:var(--porcelain);white-space:nowrap;
}
.version-badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(47,227,208,.1);
  border:1px solid rgba(47,227,208,.35);
  color:var(--cyan);
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.06em;
  white-space:nowrap;
}
.version-badge__dot{
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,227,208,.18);
}
.quick-actions{display:flex;align-items:center;gap:2px;margin-left:auto;}
.quick-action{
  padding:6px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;color:var(--silver);
  border:1px solid transparent;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.quick-action:hover{background:rgba(255,255,255,.06);color:var(--porcelain);border-color:var(--line);}
.status-bar__cta{flex:0 0 auto;padding:9px 18px;font-size:13px;}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;width:100%;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 9. Mobile nav toggle & scrim ---------- */
.nav-toggle{
  display:none;flex:0 0 auto;
  width:44px;height:44px;border-radius:14px;
  border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(47,227,208,.08);}
.nav-toggle__bar{
  display:block;width:18px;height:2px;border-radius:2px;
  background:var(--porcelain);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(2){opacity:0;}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-scrim{
  display:none;position:fixed;inset:0;z-index:125;
  background:rgba(6,24,38,.74);
  opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease);
}
.site-header[data-open="true"] .nav-scrim{opacity:1;pointer-events:auto;}

/* ---------- 10. Floating dock ---------- */
.dock{
  position:fixed;right:24px;bottom:24px;z-index:140;
  display:flex;flex-direction:column;align-items:flex-end;gap:10px;
}
.dock__panel{
  display:grid;gap:4px;padding:10px;min-width:196px;
  background:var(--band);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:0 20px 46px rgba(0,0,0,.55);
  opacity:0;transform:translateY(8px) scale(.98);pointer-events:none;
  transition:opacity .12s var(--ease),transform .12s var(--ease);
}
.dock[data-open="true"] .dock__panel{opacity:1;transform:none;pointer-events:auto;}
.dock__link{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:var(--r-sm);
  font-size:13px;font-weight:600;color:var(--silver);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.dock__link:hover{background:rgba(47,227,208,.12);color:var(--cyan);}
.dock__code{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--muted);
}
.dock__toggle{
  width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--cyan);color:var(--ink);
  box-shadow:0 12px 28px rgba(47,227,208,.28);
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.dock__toggle:hover{background:#5CF0E0;box-shadow:0 12px 28px rgba(47,227,208,.44);}
.dock__toggle-icon{position:relative;width:16px;height:16px;display:block;}
.dock__toggle-icon::before,.dock__toggle-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--ink);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform .18s var(--ease);
}
.dock__toggle-icon::before{width:16px;height:2px;}
.dock__toggle-icon::after{width:2px;height:16px;}
.dock[data-open="true"] .dock__toggle-icon::after{transform:translate(-50%,-50%) scaleY(0);}
.dock__sr{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip-path:inset(50%);white-space:nowrap;
}

/* ---------- 11. Panels / tags / stats ---------- */
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:clamp(20px,3vw,32px);
}
.panel--band{background:var(--band);border-color:transparent;border-radius:var(--r-lg);}
.panel--plain{background:transparent;border:0;padding:0;border-radius:0;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.08em;
  border:1px solid var(--line);color:var(--silver);
}
.tag--cyan{color:var(--cyan);border-color:rgba(47,227,208,.4);background:rgba(47,227,208,.08);}
.tag--amber{color:var(--amber);border-color:rgba(255,182,92,.4);background:rgba(255,182,92,.08);}
.tag--sage{color:var(--sage);border-color:rgba(157,187,168,.38);background:rgba(157,187,168,.08);}

.stat{display:flex;flex-direction:column;gap:6px;}
.stat__value{
  font-family:var(--font-mono);font-size:clamp(28px,3.4vw,44px);font-weight:700;
  line-height:1;letter-spacing:-.01em;color:var(--cyan);
}
.stat__label{font-size:13px;line-height:1.6;color:var(--muted);}

/* ---------- 12. Breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:22px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
}
.breadcrumb a{transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--line);}

/* ---------- 13. Grid ---------- */
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;}
.col-3{grid-column:span 3;}
.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-9{grid-column:span 9;}
.col-12{grid-column:1 / -1;}

/* ---------- 14. Media frames ---------- */
.media-frame{
  position:relative;width:100%;overflow:hidden;
  aspect-ratio:16 / 10;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 100% at 12% 0%, rgba(47,227,208,.16), transparent 60%),
    linear-gradient(150deg,var(--band),var(--panel) 56%,var(--ink));
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(185,203,214,.08) 0 1px,transparent 1px 28px);
  opacity:.7;
}
.media-frame__inner{position:absolute;inset:0;}
.media-frame__inner img,.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame__caption{
  position:absolute;left:16px;bottom:14px;z-index:2;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--silver);background:rgba(6,24,38,.72);
  padding:5px 10px;border-radius:var(--r-pill);
}

/* ---------- 15. Timeline ---------- */
.timeline{position:relative;display:flex;flex-direction:column;gap:32px;}
.timeline::before{
  content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:var(--line);
}
.timeline__item{position:relative;padding-left:32px;}
.timeline__mark{
  position:absolute;left:0;top:8px;
  width:11px;height:11px;border-radius:50%;
  background:var(--ink);border:1px solid var(--cyan);
}
.timeline__body{display:flex;flex-direction:column;gap:8px;}
.timeline__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
}

/* ---------- 16. Reveal motion ---------- */
html.js-reveal [data-reveal]{
  opacity:0;transform:translateY(24px);
  transition:opacity .32s ease-out,transform .32s ease-out;
}
html.js-reveal [data-reveal].is-revealed{opacity:1;transform:translateY(0);}

/* ---------- 17. Footer ---------- */
.site-footer{
  margin-top:clamp(40px,6vw,88px);
  padding-top:clamp(40px,5vw,64px);
  background:var(--ink);
  border-top:1px solid var(--line);
}
.footer-grid{
  width:var(--shell);margin-inline:auto;
  display:grid;gap:clamp(24px,4vw,48px);
  grid-template-columns:minmax(220px,1.5fr) minmax(140px,.8fr) minmax(140px,.8fr) minmax(240px,1.3fr);
  padding-bottom:clamp(32px,4vw,56px);
}
.footer-brand__lockup{
  display:inline-block;
  font-family:var(--font-display);font-size:20px;font-weight:800;
  letter-spacing:-.01em;color:var(--porcelain);
  transition:color .18s var(--ease);
}
.footer-brand__lockup:hover{color:var(--cyan);}
.footer-brand__note{margin-top:10px;font-size:13px;line-height:1.7;color:var(--muted);max-width:26ch;}
.footer-brand__meta{margin-top:16px;}
.footer-col__title{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px;}
.footer-col__list a{
  display:inline-block;font-size:14px;color:var(--silver);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-col__list a:hover{color:var(--cyan);transform:translateX(3px);}
.footer-contact__line{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
  color:var(--porcelain);line-height:1.9;word-break:break-all;
}
.footer-contact__line:nth-of-type(3){font-family:var(--font-body);font-size:14px;color:var(--silver);}
.footer-contact__note{margin-top:14px;font-size:12px;line-height:1.8;color:var(--muted);max-width:34ch;}
.footer-base{
  width:var(--shell);margin-inline:auto;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-block:20px 30px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
}

/* ---------- 18. Tablet ---------- */
@media (max-width:1023px){
  :root{--rail-w:0px;--shell:min(1280px, 100% - 40px);}
  body{padding-left:0;}
  body.is-nav-open{overflow:hidden;}

  .status-bar{left:0;padding:0 16px;gap:12px;}
  .quick-actions{display:none;}
  .version-badge{display:none;}
  .status-bar__cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}

  .index-rail{
    position:fixed;top:0;left:0;bottom:0;width:min(86vw,304px);
    z-index:130;
    background:var(--panel);
    border-right:1px solid var(--line);
    transform:translateX(-104%);
    transition:transform .28s var(--ease);
    box-shadow:0 0 60px rgba(0,0,0,.55);
    overflow-y:auto;
  }
  .site-header[data-open="true"] .index-rail{transform:none;}
  .nav-scrim{display:block;}

  .brand-mark{align-items:flex-start;padding-inline:20px;}
  .brand-mark__word{letter-spacing:.22em;}
  .rail-nav{justify-content:flex-start;align-items:stretch;padding:16px 12px;overflow:visible;}
  .rail-nav__list{gap:2px;padding:0;width:100%;}
  .rail-nav__link{flex-direction:row;align-items:baseline;gap:12px;padding:13px 14px;border-radius:var(--r-sm);}
  .rail-nav__num{font-size:11px;letter-spacing:.14em;}
  .rail-nav__label{font-size:15px;}
  .rail-foot{display:none;}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));gap:20px;}
  .col-7,.col-8,.col-9,.col-12{grid-column:1 / -1;}
  .col-3,.col-4,.col-5,.col-6{grid-column:span 3;}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .dock{right:16px;bottom:16px;}
}

/* ---------- 19. Phone ---------- */
@media (max-width:719px){
  :root{--bar-h:58px;--shell:min(1280px, 100% - 32px);}
  body{font-size:15px;line-height:1.75;}
  .status-bar__lockup{font-size:14px;}
  .grid-12{grid-template-columns:1fr;gap:16px;}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:1 / -1;}
  .section{padding-block:clamp(36px,9vw,56px);}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-brand{grid-column:auto;}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px;}
  .media-frame{border-radius:var(--r-md);}
  .dock__panel{min-width:170px;}
}

/* ---------- 20. Reduced motion ---------- */
@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;
  }
  html.js-reveal [data-reveal]{opacity:1;transform:none;transition:none;}
  .footer-col__list a:hover{transform:none;}
}