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

:root{
  --ink-900:#06131F;
  --ink-800:#0B2135;
  --ink-700:#123049;
  --line:#1D4A63;
  --cyan:#2FE3D0;
  --coral:#FF6B4A;
  --lime:#B8FF5C;
  --text:#E8F4F8;
  --muted:#8FA9B8;
  --deco:#4E7186;
  --rail-w:96px;
  --cmd-h:56px;
  --wrap:1180px;
  --r-lg:26px;
  --r-md:20px;
  --r-sm:12px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Barlow Condensed","Oswald","PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --shadow-panel:0 24px 60px rgba(2,8,14,.55);
}

body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.02em;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 82% -12%,rgba(47,227,208,.10),transparent 68%),
    radial-gradient(900px 520px at 6% 112%,rgba(255,107,74,.07),transparent 70%),
    radial-gradient(rgba(143,169,184,.085) 1px,transparent 1px);
  background-size:auto,auto,22px 22px;
  background-attachment:fixed,fixed,scroll;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.1;letter-spacing:-.01em;color:var(--text)}
h1{font-size:clamp(34px,5vw,56px)}
h2{font-size:clamp(25px,3.4vw,32px)}
h3{font-size:20px;letter-spacing:0;line-height:1.35}
p{max-width:38em}
strong{color:var(--cyan);font-weight:600}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}

main{padding-left:var(--rail-w);min-height:52vh}

.bp-wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(16px,3vw,32px)}

/* ---------- 跳转链接 ---------- */
.bp-skip{
  position:fixed;top:10px;left:12px;z-index:200;
  transform:translateY(-180%);
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--cyan);color:#04202A;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-decoration:none;
  transition:transform .18s var(--ease);
}
.bp-skip:focus{transform:none}

/* ---------- 页头骨架 ---------- */
.bp-header{position:sticky;top:0;z-index:80}

.bp-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:90;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:16px 10px 18px;
  background:linear-gradient(180deg,rgba(11,33,53,.97),rgba(6,19,31,.99) 58%,rgba(11,33,53,.97));
  border-right:1px solid var(--line);
  overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;
}
.bp-rail::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--cyan),rgba(47,227,208,0));
}

.bp-brand{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  width:100%;padding:6px 2px 12px;
  border-bottom:1px solid var(--line);
  text-decoration:none;text-align:center;
}
.bp-brand__mark{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-size:19px;font-weight:800;
  line-height:1.06;letter-spacing:.16em;color:var(--text);
  text-shadow:0 0 20px rgba(47,227,208,.35);
  transition:color .18s var(--ease);
}
.bp-brand:hover .bp-brand__mark{color:var(--cyan)}
.bp-brand__sub{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.22em;
  color:var(--cyan);opacity:.85;
}

.bp-nav{width:100%}
.bp-nav__list{display:flex;flex-direction:column;gap:2px;width:100%}
.bp-nav__item{width:100%}
.bp-nav__link{
  display:flex;flex-direction:column;align-items:center;gap:1px;
  padding:8px 4px;border-radius:10px;
  text-decoration:none;color:var(--muted);font-size:12px;line-height:1.3;
  transition:color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.bp-nav__idx{font-family:var(--font-mono);font-size:9px;letter-spacing:.1em;color:var(--deco)}
.bp-nav__label{font-weight:500;letter-spacing:.04em}
.bp-nav__link:hover{color:var(--text);background:rgba(47,227,208,.08)}
.bp-nav__link[aria-current="page"]{
  color:var(--cyan);background:rgba(47,227,208,.12);
  box-shadow:inset 3px 0 0 var(--cyan);
}
.bp-nav__link[aria-current="page"] .bp-nav__idx{color:var(--cyan)}

.bp-rail__foot{
  margin-top:auto;width:100%;padding-top:12px;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  border-top:1px solid var(--line);
}
.bp-rail__note{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.06em;
  line-height:1.5;text-align:center;color:var(--muted);
}

.bp-lamp{
  flex:none;width:8px;height:8px;border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(184,255,92,.14),0 0 12px rgba(184,255,92,.75);
  animation:bp-breathe 3.2s var(--ease) infinite;
}
@keyframes bp-breathe{
  0%,100%{opacity:.55;transform:scale(.9)}
  50%{opacity:1;transform:scale(1.12)}
}

.bp-navtoggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 11px;
  border:1px solid var(--line);border-radius:14px;
  background:rgba(18,48,73,.7);
  transition:border-color .18s var(--ease);
}
.bp-navtoggle:hover{border-color:rgba(47,227,208,.6)}
.bp-navtoggle__bar{
  display:block;height:2px;border-radius:2px;background:var(--text);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.bp-navtoggle[aria-expanded="true"] .bp-navtoggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.bp-navtoggle[aria-expanded="true"] .bp-navtoggle__bar:nth-child(2){opacity:0}
.bp-navtoggle[aria-expanded="true"] .bp-navtoggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 命令栏 ---------- */
.bp-command{
  position:relative;
  display:flex;align-items:center;gap:14px;
  margin-left:var(--rail-w);min-height:var(--cmd-h);
  padding:0 clamp(14px,2.2vw,26px);
  background:rgba(6,19,31,.88);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.bp-command__label{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.bp-command__label::before{
  content:"";flex:none;width:6px;height:6px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(47,227,208,.8);
}
.bp-command__tools{display:flex;align-items:center;gap:8px;margin-left:auto}
.bp-update{
  display:inline-flex;align-items:center;gap:7px;
  padding-left:10px;border-left:1px solid var(--line);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;
  color:var(--muted);white-space:nowrap;
}
.bp-update__dot{
  flex:none;width:6px;height:6px;border-radius:50%;background:var(--lime);
  box-shadow:0 0 10px rgba(184,255,92,.8);
  animation:bp-breathe 3.2s var(--ease) infinite;
}

/* ---------- 按钮 ---------- */
.bp-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 15px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:13px;font-weight:600;line-height:1;letter-spacing:.02em;
  text-decoration:none;white-space:nowrap;cursor:pointer;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.bp-btn:active{transform:translateY(1px)}
.bp-btn--ghost{color:var(--text);background:rgba(18,48,73,.65);border-color:var(--line)}
.bp-btn--ghost:hover{color:var(--cyan);border-color:rgba(47,227,208,.6);background:rgba(47,227,208,.1)}
.bp-btn--coral{background:var(--coral);color:#1A0A05;border-color:transparent}
.bp-btn--coral:hover{background:#FF8163}
.bp-btn--lime{background:var(--lime);color:#101A06;border-color:transparent}
.bp-btn--lime:hover{background:#C9FF7E}
.bp-search-toggle[aria-expanded="true"]{color:var(--cyan);border-color:var(--cyan);background:rgba(47,227,208,.12)}

/* ---------- 站内检索面板 ---------- */
.bp-search{
  position:absolute;top:calc(100% + 10px);right:clamp(14px,2.2vw,26px);z-index:95;
  width:min(340px,calc(100vw - 28px));padding:14px;
  border:1px solid var(--line);border-radius:var(--r-md);
  background:linear-gradient(180deg,#0D2740,#0B2135);
  box-shadow:var(--shadow-panel);
  display:none;
}
.bp-search[data-open]{display:block}
.bp-search__input{
  width:100%;padding:10px 12px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#071A2A;color:var(--text);
  font-family:var(--font-body);font-size:14px;letter-spacing:.02em;
}
.bp-search__input::placeholder{color:var(--deco)}
.bp-search__hint{
  margin:10px 2px 6px;font-family:var(--font-mono);
  font-size:10px;letter-spacing:.12em;color:var(--muted);
}
.bp-search__list{display:grid;gap:2px;max-height:250px;overflow:auto}
.bp-search__item[hidden]{display:none}
.bp-search__link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 10px;border-radius:10px;
  font-size:13px;text-decoration:none;color:var(--text);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.bp-search__link:hover,.bp-search__link:focus-visible{background:rgba(47,227,208,.12);color:var(--cyan)}
.bp-search__meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:var(--deco)}
.bp-search__empty{padding:10px;text-align:center;font-size:12px;color:var(--muted)}
.bp-search__empty[hidden]{display:none}

.bp-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--lime));
  transition:transform .12s linear;
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.bp-footer{
  margin-top:clamp(56px,8vw,110px);
  padding-left:var(--rail-w);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,33,53,.92),rgba(6,19,31,1));
  color:var(--muted);
}
.bp-footer__inner{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(20px,3vw,40px);
  padding-top:clamp(34px,5vw,60px);
  padding-bottom:clamp(28px,4vw,48px);
}
.bp-footer__wordmark{
  font-family:var(--font-display);font-size:24px;font-weight:800;
  letter-spacing:.02em;color:var(--text);
}
.bp-footer__tagline{margin-top:10px;font-size:13px;line-height:1.8;color:var(--muted);max-width:32em}
.bp-footer__update{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--cyan);
}
.bp-footer__heading{
  margin-bottom:12px;font-family:var(--font-mono);font-weight:600;
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--deco);
}
.bp-footer__list{display:grid;gap:8px}
.bp-footer__link{
  font-size:13px;color:var(--muted);text-decoration:none;
  transition:color .18s var(--ease);
}
.bp-footer__link:hover{color:var(--cyan)}
.bp-footer__text{font-size:13px;line-height:1.7;color:var(--muted);word-break:break-word}
.bp-footer__note{margin-top:12px;font-size:11px;line-height:1.7;color:var(--deco)}
.bp-footer__bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;padding-top:18px;padding-bottom:clamp(30px,4.5vw,48px);
  border-top:1px solid var(--line);
}
.bp-footer__legal{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--deco);
}

/* ---------- 可复用内容组件 ---------- */
.bp-eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}
.bp-eyebrow::before{content:"";width:64px;height:1px;flex:none;background:var(--cyan)}
.bp-rule{height:1px;border:0;margin:0;background:var(--line)}
.bp-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.bp-card{
  position:relative;padding:20px;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(18,48,73,.88),rgba(11,33,53,.92));
}
.bp-card--accent{border-top:3px solid var(--cyan)}
.bp-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line);border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);
}
.bp-tag--lime{background:var(--lime);border-color:transparent;color:#101A06}

.bp-media{
  position:relative;overflow:hidden;aspect-ratio:16/9;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:
    radial-gradient(120% 90% at 82% 0%,rgba(47,227,208,.16),transparent 62%),
    linear-gradient(160deg,#123049,#0B2135 58%,#06131F);
}
.bp-media img{width:100%;height:100%;object-fit:cover}
.bp-media--wide{aspect-ratio:21/9}
.bp-media--square{aspect-ratio:1/1}
.bp-media--tall{aspect-ratio:4/5}
.bp-media__caption{
  position:absolute;left:14px;bottom:12px;
  padding:4px 10px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(6,19,31,.72);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
}

.bp-reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.bp-reveal.is-in{opacity:1;transform:translateY(0)}

/* ---------- 平板 ---------- */
@media (max-width:1080px){
  .bp-footer__inner{grid-template-columns:1fr 1fr}
  .bp-footer__brand{grid-column:1 / -1}
}

/* ---------- 移动端：左轨折叠为顶部命令栏 ---------- */
@media (max-width:900px){
  main{padding-left:0}
  .bp-footer{padding-left:0}
  .bp-rail{
    position:relative;inset:auto;width:100%;height:auto;
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:10px 16px;
    border-right:0;border-bottom:1px solid var(--line);
    overflow:visible;
  }
  .bp-rail::before{height:2px}
  .bp-brand{
    flex-direction:row;align-items:baseline;gap:10px;
    width:auto;padding:0;border-bottom:0;
  }
  .bp-brand__mark{writing-mode:horizontal-tb;text-orientation:mixed;font-size:18px;letter-spacing:.08em}
  .bp-brand__sub{font-size:9px}
  .bp-navtoggle{display:flex;order:3}
  .bp-rail__foot{display:none}
  .bp-nav{
    order:4;position:absolute;top:100%;left:0;right:0;z-index:88;
    display:none;padding:10px;
    background:linear-gradient(180deg,#0B2135,#071A2A);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-panel);
  }
  .bp-nav[data-open]{display:block}
  .bp-nav__list{gap:4px}
  .bp-nav__link{
    flex-direction:row;align-items:center;justify-content:flex-start;
    gap:12px;padding:12px 14px;border-radius:12px;font-size:14px;
  }
  .bp-nav__idx{font-size:10px;min-width:18px}
  .bp-nav__link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--cyan)}

  .bp-command{margin-left:0;gap:10px;padding:8px 14px;min-height:0}
  .bp-command__label{font-size:10px;letter-spacing:.1em}
  .bp-update{display:none}
  .bp-search{left:14px;right:14px;width:auto;top:calc(100% + 6px)}
  .bp-progress{height:2px}
}

@media (max-width:640px){
  .bp-command{flex-wrap:nowrap}
  .bp-command__label{display:none}
  .bp-command__tools{margin-left:auto;gap:6px}
  .bp-btn{padding:8px 12px;font-size:12px}
  .bp-footer__inner{grid-template-columns:1fr}
  .bp-footer__bar{flex-direction:column;align-items:flex-start}
}

/* ---------- 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .bp-reveal{opacity:1;transform:none}
  .bp-progress{transition:none}
  .bp-lamp,.bp-update__dot{animation:none;opacity:1;transform:none}
}