/* ============================================================
   乐发平台 · 共享样式 /assets/site.css
   命令栏头部 → 纵向叙事长卷 → 深空蓝展区页脚
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,picture,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{width:100%;border-collapse:collapse}

/* ---------- 2. Tokens ---------- */
:root{
  --orange:#FF6B2C;
  --orange-deep:#E0551F;
  --orange-pale:#FFE8DD;
  --navy:#0B2545;
  --navy-deep:#081B33;
  --navy-soft:#14345C;
  --paper:#F5F7FA;
  --white:#FFFFFF;
  --grey:#8892A0;
  --hair:#DCE3EC;
  --teal:#00B8A9;
  --amber:#FFC043;
  --ink:#1A1A1A;
  --ink-soft:#4A5768;

  --font-head:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:64px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

/* ---------- 3. Base & 中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.78;
  color:var(--ink);
  background:var(--paper);
  letter-spacing:.012em;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:768px){body{font-size:17px}}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;line-height:1.2;letter-spacing:-.012em;color:var(--navy);text-wrap:balance}
h1{font-size:clamp(2rem,5vw,3.4rem)}
h2{font-size:clamp(1.55rem,3vw,2.3rem)}
h3{font-size:clamp(1.12rem,1.8vw,1.4rem);line-height:1.38}
h4{font-size:1rem;line-height:1.45}
strong{font-weight:700;color:var(--navy)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
::selection{background:var(--orange);color:#fff}

/* ---------- 4. Focus ---------- */
:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--amber)}
.btn:focus-visible{outline:3px solid currentColor;outline-offset:-4px}

/* ---------- 5. Layout ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(48px,6.5vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section-head{display:grid;gap:.7rem;max-width:66ch;margin-bottom:clamp(24px,3vw,44px)}
.section-head__idx{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.22em;color:var(--orange);text-transform:uppercase}
.section-head__title{font-size:clamp(1.55rem,3vw,2.3rem)}
.section-head__note{font-size:.98rem;color:var(--ink-soft)}
.grid{display:grid;gap:clamp(18px,2.4vw,30px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}
.band{position:relative;padding-block:clamp(22px,3vw,34px);background:var(--navy);color:#DCE5F0;overflow:hidden}
.band::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(115deg,rgba(255,255,255,.07) 0 2px,transparent 2px 22px)}
.band--light{background:var(--orange-pale);color:var(--navy)}
.band--light::after{background:repeating-linear-gradient(115deg,rgba(224,85,31,.1) 0 2px,transparent 2px 22px)}

/* ---------- 6. Buttons & links ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45em;font-family:var(--font-head);font-weight:700;font-size:.92rem;letter-spacing:.04em;line-height:1;padding:.88em 1.35em;border:1.5px solid transparent;cursor:pointer;transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease)}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-deep)}
.btn--ghost{background:transparent;border-color:rgba(11,37,69,.24);color:var(--navy)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange-deep);background:rgba(255,107,44,.07)}
.btn--cta{background:var(--orange);color:#fff;clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px)}
.btn--cta:hover{background:var(--orange-deep)}
.link{position:relative;color:var(--orange-deep);font-weight:600;padding-bottom:2px}
.link::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1.5px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .28s var(--ease)}
.link:hover::after{transform:scaleX(1);transform-origin:left}

/* ---------- 7. Components ---------- */
.plate{display:grid;gap:.35rem;border-top:2px solid var(--navy);padding-top:.85rem}
.plate__idx{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;color:var(--orange)}
.plate__title{font-family:var(--font-head);font-weight:800;font-size:1.05rem;color:var(--navy)}
.plate__note{font-size:.85rem;line-height:1.7;color:var(--grey)}

.panel{position:relative;background:var(--white);padding:clamp(20px,2.4vw,34px);clip-path:polygon(20px 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%,0 20px)}
.panel::before{content:"";position:absolute;top:0;left:0;width:52px;height:4px;background:var(--orange)}
.panel--navy{background:var(--navy);color:#CBD8E8}
.panel--navy h3,.panel--navy h2{color:#fff}

.chip{display:inline-flex;align-items:center;gap:.42em;font-size:.72rem;letter-spacing:.08em;line-height:1;padding:.42em .78em;border:1px solid rgba(11,37,69,.18);color:var(--navy)}
.chip--east{border-color:rgba(0,184,169,.55);color:#007C72}
.chip--south{border-color:rgba(224,85,31,.45);color:#A63C12}

.metric{display:grid;gap:.25rem}
.metric__value{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.05;letter-spacing:-.02em;color:var(--navy)}
.metric__label{font-size:.82rem;letter-spacing:.08em;color:var(--grey)}

.figure{display:block}
.figure__media{position:relative;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(150deg,var(--navy) 0%,var(--navy-soft) 58%,#1E5088 100%)}
.figure__media img{width:100%;height:100%;object-fit:cover}
.figure__media::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(135deg,rgba(255,255,255,.06) 0 2px,transparent 2px 20px)}
.figure__cap{margin-top:.7rem;font-size:.82rem;color:var(--grey)}
.figure--wide .figure__media{aspect-ratio:21/9}
.figure--tall .figure__media{aspect-ratio:4/5}

.crumbs{padding-block:.9rem;font-size:.82rem;color:var(--grey)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.crumbs__link{color:var(--ink-soft);transition:color .2s var(--ease)}
.crumbs__link:hover{color:var(--orange-deep)}
.crumbs__sep{color:var(--hair)}
.crumbs__item[aria-current="page"]{color:var(--navy);font-weight:700}

.prose{max-width:72ch;font-size:1.01rem;line-height:1.85;color:#2B2B2B}
.prose p+p{margin-top:1.05em}
.prose h2{margin:2.2em 0 .7em;font-size:clamp(1.4rem,2.4vw,1.9rem)}
.prose h3{margin:1.8em 0 .6em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose li+li{margin-top:.4em}

.accordion{border-top:1px solid var(--hair)}
.accordion__item{border-bottom:1px solid var(--hair)}
.accordion__trigger{width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.05rem 0;text-align:left;font-family:var(--font-head);font-weight:700;font-size:1rem;color:var(--navy);transition:color .2s var(--ease)}
.accordion__trigger:hover{color:var(--orange-deep)}
.accordion__mark{position:relative;flex:0 0 auto;width:16px;height:16px}
.accordion__mark::before,.accordion__mark::after{content:"";position:absolute;background:var(--orange);transition:transform .25s var(--ease)}
.accordion__mark::before{top:7px;left:0;width:16px;height:2px}
.accordion__mark::after{left:7px;top:0;width:2px;height:16px}
.accordion__trigger[aria-expanded="true"] .accordion__mark::after{transform:scaleY(0)}
.accordion__panel{padding-bottom:1.15rem;font-size:.96rem;line-height:1.85;color:var(--ink-soft)}
.accordion__panel[hidden]{display:none}

/* ---------- 8. Header ---------- */
.skip-link{position:fixed;top:8px;left:8px;z-index:200;padding:.7em 1.1em;background:var(--orange);color:#fff;font-weight:700;font-size:.88rem;transform:translateY(-200%);transition:transform .2s var(--ease)}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

.site-header{position:sticky;top:0;z-index:80;background:var(--navy);color:#fff;box-shadow:0 12px 34px -26px rgba(11,37,69,.95)}

.cmd-rail{background:var(--navy-deep);border-bottom:1px solid rgba(255,255,255,.08);overflow:hidden;max-height:44px;transition:max-height .32s var(--ease),opacity .28s var(--ease),border-color .32s var(--ease)}
.site-header[data-condensed] .cmd-rail{max-height:0;opacity:0;border-bottom-color:transparent}
.cmd-rail__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;font-size:.78rem;letter-spacing:.06em;color:#9FB0C8}
.cmd-rail__meta,.cmd-rail__status{display:flex;align-items:center;gap:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmd-rail__meta .mono{color:#fff;font-size:.78rem;letter-spacing:.08em}
.cmd-rail__sep{flex:0 0 auto;width:26px;height:1px;background:var(--orange)}
.cmd-rail__dot{flex:0 0 auto;width:7px;height:7px;background:var(--teal);transform:rotate(45deg)}

.cmd-bar{position:relative;background:var(--navy)}
.cmd-bar__inner{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);min-height:var(--header-h)}
.brand{display:flex;align-items:center;gap:.7rem;flex:0 0 auto;padding-block:8px}
.brand__mark{display:grid;place-items:center;width:40px;height:40px;background:var(--orange);color:#fff;clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);transition:background-color .22s var(--ease)}
.brand:hover .brand__mark{background:var(--orange-deep)}
.brand__glyph{font-family:var(--font-head);font-weight:800;font-size:1.24rem;line-height:1}
.brand__text{display:flex;flex-direction:column;line-height:1.22}
.brand__name{font-family:var(--font-head);font-weight:800;font-size:1.06rem;letter-spacing:.08em;color:#fff}
.brand__tag{margin-top:2px;font-size:.66rem;letter-spacing:.05em;color:#8FA3BF}

.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:stretch;gap:2px}
.site-nav__item{display:flex}
.site-nav__link{position:relative;display:flex;align-items:baseline;gap:.45rem;padding:.62rem .74rem;font-size:.92rem;font-weight:600;color:#C6D2E2;transition:color .22s var(--ease),background-color .22s var(--ease)}
.site-nav__link::after{content:"";position:absolute;left:.74rem;right:.74rem;bottom:.24rem;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease)}
.site-nav__link:hover,.site-nav__link:focus-visible{color:#fff}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:#fff}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__idx{flex:0 0 auto;font-size:.66rem;letter-spacing:.08em;color:var(--orange)}
.site-nav__label{white-space:nowrap}

.cmd-bar__actions{display:flex;align-items:center;gap:.55rem;flex:0 0 auto}
.nav-toggle{position:relative;z-index:6;display:none;align-items:center;gap:.55rem;padding:.55rem .7rem;border:1px solid rgba(255,255,255,.22);color:#fff;transition:border-color .2s var(--ease),background-color .2s var(--ease)}
.nav-toggle:hover{border-color:var(--orange);background:rgba(255,107,44,.14)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars > span{display:block;height:2px;background:currentColor;transition:transform .25s var(--ease),opacity .18s var(--ease)}
.site-header[data-open] .nav-toggle__bars > span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars > span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars > span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{font-size:.8rem;font-weight:700;letter-spacing:.1em}

.scroll-meter{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(255,255,255,.12);overflow:hidden}
.scroll-meter__fill{display:block;width:100%;height:100%;background:linear-gradient(90deg,var(--orange) 0%,var(--amber) 100%);transform:scaleX(0);transform-origin:left center}

/* ---------- 9. Footer ---------- */
.site-footer{position:relative;margin-top:clamp(48px,7vw,96px);background:var(--navy);color:#C6D2E2;overflow:hidden}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:repeating-linear-gradient(135deg,var(--orange) 0 18px,var(--orange-deep) 18px 24px,var(--navy-soft) 24px 46px)}
.site-footer::after{content:"";position:absolute;right:-90px;bottom:-90px;width:340px;height:340px;pointer-events:none;background:radial-gradient(circle at 35% 35%,rgba(255,107,44,.22),transparent 68%)}

.footer-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,.85fr)) minmax(0,1.2fr);gap:clamp(24px,3vw,44px);padding-block:clamp(42px,5vw,72px)}
.footer-brand__name{font-family:var(--font-head);font-weight:800;font-size:1.5rem;letter-spacing:.08em;color:#fff}
.footer-brand__brief{margin-top:.85rem;max-width:34ch;font-size:.9rem;line-height:1.85;color:#9FB0C8}
.footer-brand__meta{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.15rem}
.footer-brand .chip{border-color:rgba(255,255,255,.2);color:#C6D2E2}
.footer-brand .chip--east{border-color:rgba(0,184,169,.5);color:#5FE3D6}
.footer-brand .chip--south{border-color:rgba(255,192,67,.48);color:var(--amber)}

.footer-col__title{position:relative;margin-bottom:1.05rem;padding-bottom:.7rem;font-family:var(--font-head);font-size:.84rem;font-weight:700;letter-spacing:.16em;color:#fff}
.footer-col__title::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--orange)}
.footer-col__list{display:grid;gap:.62rem}
.footer-link{position:relative;display:inline-block;font-size:.9rem;color:#9FB0C8;padding-bottom:1px;transition:color .2s var(--ease)}
.footer-link::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--orange);transform:scaleX(0);transform-origin:right;transition:transform .28s var(--ease)}
.footer-link:hover{color:#fff}
.footer-link:hover::after{transform:scaleX(1);transform-origin:left}

.footer-contact__row{display:grid;gap:.1rem;padding-block:.55rem;border-bottom:1px dashed rgba(255,255,255,.12)}
.footer-contact__label{font-size:.66rem;letter-spacing:.18em;color:#7D8FA8}
.footer-contact__value{font-size:.88rem;line-height:1.6;color:#E4EAF2;overflow-wrap:anywhere}

.footer-base{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.7rem 1.4rem;padding-block:1.25rem;border-top:1px solid rgba(255,255,255,.1);font-size:.78rem;color:#8FA3BF}
.footer-base__copy{display:flex;align-items:center;gap:.5rem}
.footer-base__copy .mono{color:#fff;letter-spacing:.06em}
.footer-base__legal{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem 1.2rem}
.footer-base__icp{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.04em;color:#7D8FA8}

/* ---------- 10. JS 增强态 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(18px)}
.js [data-reveal].is-in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease)}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1200px){
  .site-nav__idx{display:none}
  .site-nav__link{padding-inline:.6rem;font-size:.88rem}
  .site-nav__link::after{left:.6rem;right:.6rem}
}

@media (max-width:1120px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;left:auto;z-index:5;
    display:block;width:min(360px,88vw);
    margin-left:0;padding:calc(var(--header-h) + 34px) 26px 34px;
    background:var(--navy-deep);overflow-y:auto;
    visibility:hidden;transform:translateX(103%);
    box-shadow:-28px 0 70px -34px rgba(0,0,0,.85);
    transition:transform .34s var(--ease),visibility .34s var(--ease);
  }
  .site-nav[data-open]{visibility:visible;transform:translateX(0)}
  .site-nav__list{flex-direction:column;gap:0}
  .site-nav__item{display:block}
  .site-nav__link{align-items:center;gap:.9rem;padding:1.05rem 0;font-size:1.02rem;border-bottom:1px solid rgba(255,255,255,.09)}
  .site-nav__link::after{left:0;right:auto;bottom:-1px;width:100%}
  .site-nav__idx{display:inline-block;min-width:2.4em;font-size:.72rem}
  .site-nav__link[aria-current="page"]{color:var(--orange)}
  body.is-nav-open{overflow:hidden}
  body.is-nav-open::after{content:"";position:fixed;inset:0;z-index:70;background:rgba(8,27,51,.55)}
}

@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-brand,.footer-contact{grid-column:span 3}
  .footer-brand__brief{max-width:56ch}
}

@media (max-width:900px){
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:860px){
  .cmd-rail__status{display:none}
}

@media (max-width:768px){
  :root{--header-h:58px}
  .cmd-rail{display:none}
  .brand__mark{width:36px;height:36px}
  .brand__glyph{font-size:1.1rem}
}

@media (max-width:640px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-brand,.footer-contact{grid-column:auto}
  .footer-base{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .brand__tag{display:none}
  .btn--cta{padding:.8em 1.05em;font-size:.86rem}
  .nav-toggle__text{display:none}
}

/* ---------- 12. 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}
  .js [data-reveal]{opacity:1;transform:none}
}