/* ============ 01 · tokens & reset ============ */
:root{
  --bg-deep:#0A1A2F;
  --bg-panel:#0F2740;
  --line:#24374D;
  --cream:#F2EFE6;
  --ink:#1B1611;
  --orange:#FF6A2B;
  --orange-hi:#FF824E;
  --cyan:#38D6E0;
  --green:#4FD08A;
  --gold:#E8C36B;
  --muted:#7C8CA1;
  --text:#C9D6E6;
  --header-h:72px;
  --wrap:1240px;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --cut-lg:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
  --cut-sm:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%}
button{font:inherit;color:inherit}

/* ============ 02 · base blueprint canvas ============ */
body{
  min-height:100%;
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  color:var(--text);
  background-color:var(--bg-deep);
  background-image:
    linear-gradient(to right,rgba(36,55,77,.34) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(36,55,77,.34) 1px,transparent 1px);
  background-size:96px 96px;
  background-position:center top;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--cream);font-weight:900;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(30px,5vw,68px)}
h2{font-size:clamp(24px,3.4vw,40px)}
h3{font-size:clamp(19px,2.2vw,26px)}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--orange)}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:2px}
::selection{background:var(--orange);color:#180B04}
#main-content{scroll-margin-top:calc(var(--header-h) + 18px)}
.page-main{padding-top:var(--header-h)}

/* ============ 03 · skip link ============ */
.skip-link{
  position:fixed;left:16px;top:-72px;z-index:200;
  padding:11px 18px;
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  color:#180B04;background:var(--orange);
  clip-path:var(--cut-sm);
  transition:top .2s ease;
}
.skip-link:focus{top:14px;color:#180B04}

/* ============ 04 · layout utilities ============ */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:24px}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.col-index{grid-column:1 / span 2}
.col-main{grid-column:3 / span 7}
.col-aside{grid-column:10 / span 3}
.col-full{grid-column:1 / -1}
.mono-label{
  font-family:var(--mono);font-size:12px;line-height:1.5;
  letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
}
.tick-rule{
  height:14px;border-bottom:1px solid var(--line);
  background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 16px);
  background-position:0 100%;background-size:auto 8px;background-repeat:repeat-x;
}
.section-head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 16px;
  padding-bottom:14px;margin-bottom:28px;border-bottom:1px solid var(--line);
}
.section-head__idx{font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--gold)}
.section-head__title{margin:0;font-size:clamp(22px,3vw,34px)}
.section-head__note{margin-left:auto;font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--muted)}
.prose{max-width:68ch;font-size:17px;line-height:1.75}
.prose p+p{margin-top:1em}
.prose strong{color:var(--cream);font-weight:600}

/* ============ 05 · buttons ============ */
.btn{
  --btn-bg:transparent;--btn-fg:var(--cream);--btn-bd:var(--line);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-family:var(--sans);font-size:15px;font-weight:500;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  color:var(--btn-fg);background:var(--btn-bg);
  border:1px solid var(--btn-bd);
  clip-path:var(--cut-sm);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{--btn-bg:var(--orange);--btn-fg:#180B04;--btn-bd:var(--orange);font-weight:700}
.btn:hover{color:var(--btn-fg)}
.btn--primary:hover{--btn-bg:var(--orange-hi);--btn-bd:var(--orange-hi);color:#180B04}
.btn--ghost:hover{--btn-bd:var(--cyan);--btn-fg:var(--cream)}
.btn--sm{padding:8px 15px;font-family:var(--mono);font-size:13px;letter-spacing:.1em}

/* ============ 06 · panels / data / media ============ */
.panel{
  position:relative;
  padding:24px;
  background:var(--bg-panel);
  border:1px solid var(--line);
  clip-path:var(--cut-lg);
  transition:border-color .2s ease,background-color .2s ease;
}
.panel--cream{background:var(--cream);color:var(--ink);border-color:var(--cream)}
.panel--cream h1,.panel--cream h2,.panel--cream h3{color:var(--ink)}
.panel--ink{background:var(--ink);border-color:#2A2118}
.panel--link{cursor:pointer}
.panel--link:hover,.panel--link:focus-within{border-color:var(--cyan)}
.panel__corner{position:absolute;right:12px;bottom:10px}

.badge-cal{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
}
.badge-cal::before{content:"";width:14px;height:1px;background:var(--line)}

.stat{display:flex;flex-direction:column;gap:8px}
.stat__num{
  font-family:var(--mono);font-weight:700;
  font-size:clamp(48px,8vw,120px);line-height:.86;letter-spacing:-.03em;
  color:var(--cream);
}
.stat__unit{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--cyan);margin-left:8px}
.stat__cap{font-size:15px;color:var(--muted);max-width:34ch}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;
  border:1px solid currentColor;color:var(--muted);
}
.tag--stock{color:var(--green)}
.tag--transit{color:var(--cyan)}
.tag--order{color:var(--gold)}
.tag--out{color:var(--orange)}

.rail{
  display:flex;gap:16px;
  overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;
  padding-bottom:14px;
  scrollbar-color:var(--line) transparent;
}
.rail__item{flex:0 0 min(320px,80vw);scroll-snap-align:start}

.media-frame{
  position:relative;overflow:hidden;
  width:100%;aspect-ratio:16/9;
  background:var(--bg-panel);border:1px solid var(--line);
  clip-path:var(--cut-lg);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame img,.media-frame svg{display:block;width:100%;height:100%;object-fit:cover}
.media-frame__inner{position:absolute;inset:0}
.media-frame__overlay{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(56,214,224,.34) 1px,transparent 1px);
  background-size:16px 16px;
}
.media-frame__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--mono);font-size:11px;letter-spacing:.13em;
  color:var(--cream);background:rgba(10,26,47,.82);
  border-top:1px solid var(--line);
}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}

.next-step{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  padding:22px 24px;
  background:var(--bg-panel);border:1px solid var(--line);
  border-left:3px solid var(--orange);
}
.next-step__label{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;color:var(--gold)}
.next-step__text{flex:1 1 260px;font-size:16px;color:var(--text)}

/* ============ 07 · masthead ============ */
.masthead{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.masthead.is-scrolled,.masthead.is-open{
  background:var(--bg-deep);
  border-bottom-color:var(--line);
  box-shadow:0 22px 44px -34px rgba(0,0,0,.95);
}
.masthead__inner{
  display:flex;align-items:center;gap:18px;
  width:100%;max-width:var(--wrap);margin-inline:auto;
  min-height:var(--header-h);padding:12px 24px;
}
.masthead__brand{display:flex;align-items:center;gap:12px;color:var(--cream);text-decoration:none}
.masthead__brand:hover{color:var(--cream)}
.masthead__mark{
  display:grid;place-items:center;
  width:38px;height:38px;flex:0 0 auto;
  font-family:var(--mono);font-size:14px;font-weight:700;letter-spacing:.04em;
  color:#180B04;background:var(--orange);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.masthead__names{display:flex;flex-direction:column;line-height:1.25}
.masthead__name{font-size:17px;font-weight:900;letter-spacing:-.01em;color:var(--cream)}
.masthead__tagline{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--muted)}
.masthead__badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.13em;
  color:var(--green);border:1px solid rgba(79,208,138,.34);
}
.pulse-dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(79,208,138,.16)}
.masthead__nav{display:flex;align-items:center;gap:20px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list__item{display:flex}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:10px 11px;
  font-size:15px;font-weight:500;color:var(--text);text-decoration:none;
  transition:color .2s ease;
}
.nav-link__idx{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--gold);opacity:.75}
.nav-link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:4px;height:1px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cream)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cream)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link--util{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;color:var(--muted)}
.masthead__utility{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:9px 12px;background:transparent;
  border:1px solid var(--line);clip-path:var(--cut-sm);
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--cream);
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:1px;background:var(--cream)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:1px;background:var(--cream);
  transition:transform .2s ease,top .2s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);background:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);background:var(--orange)}
.masthead__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent}
.masthead__progress-fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}

/* ============ 08 · footer ============ */
.site-foot{
  margin-top:96px;
  background:var(--ink);
  border-top:1px solid #2A2118;
}
.site-foot__inner{
  display:grid;grid-template-columns:1.25fr 1.9fr 1fr;gap:40px;
  padding-block:56px 44px;
}
.foot-brand__name{font-size:19px;font-weight:900;letter-spacing:-.01em;color:var(--cream)}
.foot-brand__desc{margin-top:6px;font-size:15px;color:var(--muted)}
.foot-brand__meta{margin-top:16px;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text)}
.foot-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.foot-col__title{
  margin-bottom:14px;font-family:var(--mono);font-size:11.5px;font-weight:400;
  letter-spacing:.18em;text-transform:uppercase;color:var(--gold);
}
.foot-list__item+.foot-list__item{margin-top:2px}
.foot-link{
  display:inline-block;padding:3px 0;
  font-size:14.5px;color:var(--muted);text-decoration:none;
  background-image:linear-gradient(var(--orange),var(--orange));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  transition:color .2s ease,background-size .24s ease;
}
.foot-link:hover,.foot-link:focus-visible{color:var(--cream);background-size:100% 1px}
.foot-contact__title{display:block;margin-bottom:12px;color:var(--gold)}
.foot-contact__line{font-family:var(--mono);font-size:13px;letter-spacing:.04em;color:var(--text)}
.foot-contact__line+.foot-contact__line{margin-top:6px}
.foot-contact__line--addr{font-family:var(--sans);font-size:13.5px;line-height:1.7;color:var(--muted);margin-top:12px}
.foot-contact__note{margin-top:10px;font-size:13px;color:var(--muted)}
.site-foot__base{border-top:1px solid #2A2118}
.site-foot__base-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;
  padding-block:20px;
}
.foot-note{flex:1 1 320px;font-size:13.5px;color:var(--muted)}
.foot-legal{display:flex;flex-wrap:wrap;gap:16px}
.foot-legal__item{display:flex}
.foot-meta{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted)}

/* ============ 09 · motion ============ */
[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
}
[data-reveal].is-in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
}

/* ============ 10 · responsive ============ */
@media (max-width:1279px){
  .masthead__badge{display:none}
}
@media (max-width:1023px){
  :root{--header-h:64px}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-index,.col-main,.col-aside,.col-full{grid-column:1 / -1}
  .nav-toggle{display:inline-flex}
  .masthead__utility{display:none}
  .masthead__nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    display:block;margin-left:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:8px 20px 26px;
    background:var(--bg-deep);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s linear;
  }
  .masthead__nav[data-open="true"]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    display:flex;justify-content:flex-start;
    padding:15px 4px;font-size:17px;
    border-bottom:1px solid var(--line);
  }
  .nav-link::after{left:4px;right:auto;width:34px;bottom:8px}
  .site-foot__inner{grid-template-columns:1fr;gap:36px;padding-block:44px 32px}
  .site-foot__base-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:719px){
  body{font-size:16px;background-size:64px 64px}
  .container{padding-inline:18px}
  .masthead__inner{padding:10px 18px;gap:12px}
  .masthead__tagline{display:none}
  .foot-index{grid-template-columns:repeat(2,minmax(0,1fr))}
  .panel{padding:18px}
  .site-foot{margin-top:64px}
}