/* ============ 01 design tokens ============ */
:root{
  --ink:#0A1C17;
  --char:#12171A;
  --panel:#12312A;
  --neon:#3DF5B0;
  --amber:#FFA63D;
  --ice:#7FD7FF;
  --mist:#E9F5F0;
  --sage:#7C9A8F;
  --coral:#FF6B5A;
  --grad:linear-gradient(135deg,#3DF5B0 0%,#7FD7FF 100%);
  --line:rgba(124,154,143,.26);
  --line-strong:rgba(124,154,143,.46);
  --maxw:1200px;
  --pad:clamp(18px,4vw,48px);
  --cut:16px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

/* ============ 02 reset & base ============ */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:136px;
}
body{
  margin:0;
  min-height:100vh;
  background:var(--ink);
  color:var(--mist);
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.62;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
p,h1,h2,h3,h4,h5,h6,figure,blockquote{margin:0}
figure{padding:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:2px}
::selection{background:var(--neon);color:#062018}

/* ============ 03 typography ============ */
h1,h2,h3,h4{font-weight:800;line-height:1.16;letter-spacing:.005em}
h1{font-size:clamp(32px,5.4vw,44px)}
h2{font-size:clamp(22px,3.2vw,26px)}
h3{font-size:19px;font-weight:700}
.mono{font-family:var(--mono);font-weight:600;letter-spacing:.02em}
.kicker{
  display:inline-block;
  font-family:var(--mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--sage);
}
.lede{font-size:clamp(17px,2vw,19px);line-height:1.6;color:var(--mist);opacity:.92}
.note{font-size:13px;line-height:1.6;color:var(--sage)}
.text-neon{color:var(--neon)}
.text-amber{color:var(--amber)}
.text-ice{color:var(--ice)}
.text-sage{color:var(--sage)}

/* ============ 04 layout ============ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.stack > * + *{margin-top:.8em}
.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr)}
.grid--asym-rev{grid-template-columns:minmax(0,.85fr) minmax(0,1.35fr)}
.section{padding-block:clamp(44px,6.5vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,34px)}
.rule{height:1px;background:linear-gradient(90deg,var(--line-strong),rgba(124,154,143,0) 72%)}
.slash{display:block;height:10px;background:var(--grad);opacity:.5;clip-path:polygon(0 100%,100% 0,100% 26%,0 100%)}

/* ============ 05 panels & cards ============ */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,30px);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.panel--teal{background:var(--char)}
.panel--accent{
  border-color:rgba(61,245,176,.42);
  background:linear-gradient(140deg,rgba(61,245,176,.12),rgba(10,28,23,0) 64%),var(--panel);
}
.panel--grad{background:var(--grad);color:#062018;border-color:transparent}
.panel--grad .kicker,.panel--grad .note{color:rgba(6,32,24,.72)}
.card{
  position:relative;
  display:block;
  background:var(--char);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:transform .26s var(--ease),border-color .26s var(--ease),background-color .26s var(--ease);
}
.card:hover,.card:focus-visible{transform:translateY(-4px);border-color:rgba(61,245,176,.45);background:var(--panel)}
.card__body{padding:clamp(16px,2vw,22px)}
.card__title{font-size:19px;font-weight:800;line-height:1.3}
.card__meta{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--sage);margin-top:8px}

/* ============ 06 chapter system ============ */
.chapter{position:relative;padding-block:clamp(40px,6vw,84px)}
.chapter__num{
  font-family:var(--mono);
  font-weight:700;
  font-size:clamp(52px,8vw,96px);
  line-height:.86;
  letter-spacing:-.02em;
  color:var(--neon);
  opacity:.28;
  transition:opacity .28s var(--ease);
}
.chapter[data-active] .chapter__num{opacity:1}
.chapter__eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--sage);margin-bottom:10px}
.chapter__title{font-size:clamp(22px,3vw,26px);font-weight:800}
.chapter-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:clamp(14px,2vw,26px);margin-bottom:clamp(18px,2.6vw,30px)}
.chapter-rail{
  position:fixed;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  z-index:50;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.chapter-rail a{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--sage);
  opacity:.62;
  transition:color .2s var(--ease),opacity .2s var(--ease);
}
.chapter-rail a::before{content:"";width:14px;height:2px;background:currentColor;transition:width .2s var(--ease)}
.chapter-rail a:hover{opacity:1;color:var(--mist)}
.chapter-rail a[aria-current="true"]{color:var(--neon);opacity:1}
.chapter-rail a[aria-current="true"]::before{width:26px}

/* ============ 07 data, legend, tags ============ */
.data-row{display:flex;flex-wrap:wrap;gap:10px 22px;font-family:var(--mono);font-size:13px;letter-spacing:.02em;color:var(--sage)}
.data-row b{color:var(--mist);font-weight:600}
.stat{border-left:2px solid var(--line-strong);padding-left:14px}
.stat__num{display:block;font-family:var(--mono);font-size:clamp(24px,3.4vw,34px);font-weight:700;color:var(--neon);letter-spacing:-.01em}
.stat__label{display:block;font-size:13px;color:var(--sage);margin-top:6px}
.legend{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;color:var(--sage)}
.legend__item{display:inline-flex;align-items:center;gap:8px}
.legend__dot{width:8px;height:8px;border-radius:50%;background:var(--neon);flex:none}
.legend__dot--amber{background:var(--amber)}
.legend__dot--ice{background:var(--ice)}
.legend__dot--coral{background:var(--coral)}
.legend__dot--sage{background:var(--sage)}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:3px 9px;
  border:1px solid var(--line-strong);
  background:rgba(18,49,42,.62);
  color:var(--sage);
}
.tag--live{color:var(--neon);border-color:rgba(61,245,176,.5)}
.tag--time{color:var(--amber);border-color:rgba(255,166,61,.5)}
.tag--warn{color:var(--coral);border-color:rgba(255,107,90,.5)}
.tag--video{color:var(--ice);border-color:rgba(127,215,255,.5)}

/* ============ 08 buttons & filters ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--mist);
  background:rgba(18,49,42,.72);
  border:1px solid var(--line-strong);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease),filter .22s var(--ease);
}
.btn:hover{color:var(--neon);border-color:rgba(61,245,176,.55)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--neon)}
.btn--primary{background:var(--grad);color:#062018;border-color:transparent}
.btn--primary:hover{color:#062018;filter:brightness(1.07)}
.btn--ghost{background:transparent}
.btn--sm{padding:8px 15px;font-size:13px}
.filter-bar{display:flex;flex-wrap:wrap;gap:8px}
.filter-chip{
  font-family:var(--mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  padding:6px 14px;
  color:var(--sage);
  border:1px solid var(--line);
  background:transparent;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.filter-chip:hover{color:var(--mist);border-color:var(--line-strong)}
.filter-chip[aria-pressed="true"]{color:#062018;background:var(--neon);border-color:var(--neon)}
.filter-item[hidden]{display:none}

/* ============ 09 media ============ */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--char);
  border:1px solid var(--line);
  aspect-ratio:16 / 9;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.media-frame--cinema{aspect-ratio:21 / 9}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(190deg,rgba(10,28,23,0) 45%,rgba(10,28,23,.78) 100%);
  pointer-events:none;
}
.media-frame:hover img{transform:scale(1.03)}
.media-frame__tag{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:2;
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:3px 8px;
  background:rgba(10,28,23,.78);
  color:var(--amber);
  border:1px solid rgba(255,166,61,.45);
}
.media-wall{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.media-wall--wide{grid-column:span 2}
.media-caption{font-size:13px;color:var(--sage);margin-top:10px}

/* ============ 10 header ============ */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 16px;
  font-size:14px;
  font-weight:700;
  background:var(--neon);
  color:#062018;
  transform:translateY(-160%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(10,28,23,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.progress-track{height:3px;background:rgba(124,154,143,.16);overflow:hidden}
.progress-fill{
  display:block;
  height:100%;
  background:var(--grad);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}
.header-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:16px var(--pad) 10px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  transition:padding .28s var(--ease);
}
.brand-block{display:flex;align-items:baseline;gap:12px;flex:none}
.brand-name{
  font-size:22px;
  font-weight:900;
  letter-spacing:.04em;
  color:var(--mist);
}
.brand-name::after{
  content:"";
  display:inline-block;
  width:8px;
  height:8px;
  margin-left:9px;
  background:var(--neon);
  clip-path:polygon(0 0,100% 0,100% 100%);
  vertical-align:middle;
}
.brand-season{
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--amber);
  border:1px solid rgba(255,166,61,.45);
  padding:2px 8px;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.brand-season b{font-weight:700;color:var(--amber)}

.site-nav{flex:1;display:flex;justify-content:flex-end}
.nav-list{display:flex;align-items:center;gap:clamp(14px,2.1vw,28px)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:14px;
  font-weight:500;
  color:var(--mist);
  opacity:.8;
  transition:color .2s var(--ease),opacity .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--neon);opacity:1}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--neon);opacity:1;font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--line-strong);
  color:var(--mist);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:2px;background:var(--neon);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--neon);color:var(--neon)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.live-strip{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:0 var(--pad) 10px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  font-size:13px;
  color:var(--sage);
  transition:padding .28s var(--ease);
}
.live-main{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px}
.live-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--neon);
  box-shadow:0 0 0 4px rgba(61,245,176,.16);
  flex:none;
}
.live-label{color:var(--sage)}
.live-time{color:var(--amber);font-weight:700}
.live-sep{color:var(--line-strong)}
.live-meta{color:var(--sage)}
.live-meta b{color:var(--mist);font-weight:600}

.site-header[data-stuck] .header-inner{padding-top:11px;padding-bottom:8px}
.site-header[data-stuck] .brand-season{opacity:.55}
.site-header[data-stuck] .live-strip{padding-bottom:7px;font-size:12px}
.site-header[data-stuck] .live-meta{color:rgba(124,154,143,.7)}
.site-header[data-stuck] .btn--sm{padding:6px 13px;font-size:12px}

/* ============ 11 footer ============ */
.site-footer{
  position:relative;
  margin-top:clamp(52px,8vw,110px);
  background:var(--char);
  border-top:1px solid var(--line);
  padding:clamp(38px,5.5vw,68px) 0 28px;
}
.footer-rule{position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.65}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr .9fr .9fr 1.6fr;
  gap:clamp(22px,3vw,46px);
}
.footer-brand__name{font-size:20px;font-weight:900;letter-spacing:.05em;color:var(--mist)}
.footer-brand__line{margin-top:12px;font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--neon)}
.footer-head{
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--sage);
  margin-bottom:14px;
}
.footer-links li + li{margin-top:9px}
.footer-links a{
  font-size:14px;
  color:var(--mist);
  opacity:.84;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),opacity .2s var(--ease),border-color .2s var(--ease);
}
.footer-links a:hover{color:var(--neon);opacity:1;border-color:var(--neon)}
.footer-address{font-style:normal;display:grid;gap:10px;font-size:13px;color:var(--sage)}
.footer-address__row{display:grid;grid-template-columns:42px minmax(0,1fr);gap:10px;align-items:baseline}
.footer-key{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--sage)}
.footer-address__row .mono{color:var(--mist);word-break:break-all;font-size:13px}
.footer-note{
  margin-top:clamp(26px,3.6vw,44px);
  padding-top:18px;
  border-top:1px dashed var(--line);
  font-size:13px;
  line-height:1.65;
  color:var(--sage);
  max-width:78ch;
}
.footer-bottom{
  margin-top:18px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--sage);
}
.footer-closing{color:var(--amber)}

/* ============ 12 breadcrumb & misc ============ */
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--mono);font-size:12px;color:var(--sage);letter-spacing:.06em}
.breadcrumb a{color:var(--sage);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb__sep{color:var(--line-strong)}
.breadcrumb__current{color:var(--mist)}
.back-top{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:70;
  width:44px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--mono);
  font-size:14px;
  font-weight:700;
  color:#062018;
  background:var(--neon);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.back-top[data-visible]{opacity:1;visibility:visible}
html.js [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ============ 13 responsive ============ */
@media (max-width:1180px){
  .chapter-rail{display:none}
}
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--asym,.grid--asym-rev{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-col--contact{grid-column:1 / -1}
}
@media (max-width:900px){
  html{scroll-padding-top:150px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    flex-direction:column;
    padding:10px var(--pad) 20px;
    background:var(--char);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 22px 40px rgba(0,0,0,.42);
  }
  .site-nav[data-open]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li + li{border-top:1px dashed var(--line)}
  .nav-link{display:block;padding:14px 2px;font-size:15px}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{padding-left:14px}
  .nav-link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;
    top:50%;
    width:6px;
    height:6px;
    margin-top:-3px;
    background:var(--neon);
    clip-path:polygon(0 0,100% 50%,0 100%);
  }
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--asym,.grid--asym-rev{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--contact{grid-column:1 / -1}
}
@media (max-width:640px){
  body{font-size:16px}
  .header-inner{gap:14px}
  .brand-name{font-size:19px}
  .brand-season{font-size:11px;padding:2px 6px}
  .live-meta{display:none}
  .live-strip{gap:12px}
  .site-header[data-stuck] .brand-season{opacity:0;visibility:hidden}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .grid--asym,.grid--asym-rev{grid-template-columns:minmax(0,1fr)}
  .media-wall--wide{grid-column:span 1}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .chapter__num{font-size:clamp(44px,16vw,64px)}
}
@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 [data-reveal]{opacity:1;transform:none}
}