*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,address{margin:0}
ul,ol{padding:0;list-style:none}
address{font-style:normal}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer;-webkit-appearance:none;appearance:none}
input{background:none;border:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}
::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

:root{
  --blue-900:#071A2F;
  --blue-800:#0A2338;
  --blue-700:#0E2E4E;
  --blue-600:#1E6FA8;
  --orange-500:#FF6A1F;
  --orange-200:#FFA36B;
  --cyan-400:#23E0D0;
  --gray-100:#E9EDF2;
  --paper:#F7F9FB;
  --line-500:#6B7A8C;
  --amber-400:#F5C542;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-head:"Arial Narrow","Helvetica Neue Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --gutter:clamp(16px,3.4vw,32px);
  --radius-s:6px;
  --radius-m:14px;
  --radius-l:26px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-lift:0 14px 34px rgba(3,12,22,.38);
}

body{
  background-color:var(--blue-900);
  background-image:
    radial-gradient(1200px 620px at 84% -12%,rgba(30,111,168,.42),transparent 62%),
    radial-gradient(900px 520px at 4% -4%,rgba(35,224,208,.11),transparent 58%);
  background-repeat:no-repeat;
  color:#DCE7F1;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}

::selection{background:var(--orange-500);color:#150900}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;line-height:1.16;letter-spacing:-.02em;color:var(--paper);text-wrap:balance}

:where(a,button,input,[tabindex]):focus-visible{outline:3px solid var(--cyan-400);outline-offset:3px;border-radius:4px}

#main-content{scroll-margin-top:132px}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}

.section{padding-block:clamp(32px,5vw,64px)}
.section-title{font-size:clamp(24px,3vw,28px);color:#fff}
.section-flag{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--orange-200);margin-bottom:14px}
.section-flag::before{content:"";flex:0 0 auto;width:34px;height:2px;background:var(--orange-500)}
.index{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--line-500);font-variant-numeric:tabular-nums}

.grid{display:grid;gap:clamp(16px,2vw,24px)}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.panel{background:var(--blue-700);border:1px solid rgba(107,122,140,.28);border-radius:var(--radius-m);padding:clamp(16px,2.4vw,24px);color:#D6E2EE}
.panel--cut{border-radius:var(--radius-m) var(--radius-m) 0 var(--radius-m);clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;font-family:var(--font-head);font-weight:800;font-size:15px;letter-spacing:.03em;line-height:1;border:1px solid transparent;border-radius:4px 14px 4px 14px;transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease)}
.btn--accent{background:var(--orange-500);color:#180A02}
.btn--accent:hover{background:var(--orange-200);transform:translateY(-2px)}
.btn--ghost{border-color:rgba(35,224,208,.5);color:var(--cyan-400);background:rgba(35,224,208,.07)}
.btn--ghost:hover{background:rgba(35,224,208,.15);transform:translateY(-2px)}
.btn--sm{min-height:38px;padding:0 14px;font-size:13px}

.chip{display:inline-flex;align-items:center;gap:6px;min-height:26px;padding:2px 10px;font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.4;border-radius:999px;background:rgba(35,224,208,.12);color:var(--cyan-400);border:1px solid rgba(35,224,208,.3)}
.chip--orange{background:rgba(255,106,31,.14);color:var(--orange-200);border-color:rgba(255,106,31,.35)}

.breadcrumb{padding-block:14px;font-size:13px;color:#93A7BA}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line-500)}
.breadcrumb a{display:inline-flex;align-items:center;min-height:32px;transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--cyan-400)}
.breadcrumb [aria-current="page"]{color:var(--gray-100)}

.prose{max-width:68ch;background:var(--paper);color:#12232F;border-radius:var(--radius-l);padding:clamp(20px,4vw,44px);font-size:17px;line-height:1.85}
.prose h2{font-size:clamp(22px,2.6vw,26px);color:#071A2F;margin:1.4em 0 .55em}
.prose h3{font-size:19px;color:#071A2F;margin:1.3em 0 .5em}
.prose p{margin:0 0 1.1em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{color:#0B5C8A;border-bottom:1px solid rgba(11,92,138,.35)}
.prose a:hover{border-bottom-color:#0B5C8A}
.prose strong{color:#071A2F}

.media-frame{position:relative;isolation:isolate;overflow:hidden;aspect-ratio:16/9;border-radius:var(--radius-m);background:linear-gradient(150deg,rgba(35,224,208,.18),rgba(7,26,47,.32) 48%),repeating-linear-gradient(118deg,rgba(233,237,242,.07) 0 2px,transparent 2px 13px),var(--blue-700)}
.media-frame > img{width:100%;height:100%;object-fit:cover}
.media-frame::after{content:"";position:absolute;inset:auto 0 0 0;height:42%;background:linear-gradient(180deg,transparent,rgba(4,15,26,.72));pointer-events:none;z-index:1}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1}
.media-label{position:absolute;left:12px;bottom:12px;z-index:2;display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;background:rgba(7,26,47,.74);border:1px solid rgba(233,237,242,.2);color:#EAF3FB;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;font-variant-numeric:tabular-nums}

.skip-link{position:fixed;top:10px;left:10px;z-index:200;display:inline-flex;align-items:center;min-height:44px;padding:0 20px;background:var(--orange-500);color:#140800;font-family:var(--font-head);font-weight:800;font-size:14px;letter-spacing:.04em;border-radius:var(--radius-s);transform:translateY(-180%);transition:transform .2s var(--ease)}
.skip-link:focus,.skip-link:focus-visible{transform:none}

.site-header{position:relative;z-index:60;background:var(--blue-900);color:#E4EDF6;border-bottom:1px solid rgba(107,122,140,.32)}
.site-header::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;z-index:3;background:linear-gradient(90deg,var(--orange-500) 0 30%,var(--cyan-400) 30% 42%,var(--blue-600) 42% 100%)}
.hdr-progress{position:absolute;left:0;bottom:-1px;width:100%;height:2px;z-index:4;pointer-events:none;background:linear-gradient(90deg,var(--orange-500),var(--cyan-400));transform:scaleX(0);transform-origin:0 50%;transition:transform .1s linear}

.hdr-top{position:relative}
.hdr-top-inner{display:flex;align-items:center;gap:14px 20px;flex-wrap:wrap;padding-block:15px 13px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;min-height:44px}
.brand-mark{display:grid;align-content:center;gap:4px;width:38px;height:38px;padding:0 7px;flex:0 0 auto;background:var(--blue-700);border-radius:4px 13px 4px 13px;box-shadow:inset 0 0 0 1px rgba(35,224,208,.24)}
.brand-mark-line{display:block;height:3px;border-radius:2px;background:var(--orange-500)}
.brand-mark-line:nth-child(2){width:72%;background:var(--cyan-400)}
.brand-mark-line:nth-child(3){width:46%;background:rgba(233,237,242,.66)}
.brand-text{display:grid;gap:2px}
.brand-name{font-family:var(--font-head);font-weight:800;font-size:20px;line-height:1.12;letter-spacing:-.01em;color:#fff}
.brand-line{font-size:12px;line-height:1.4;letter-spacing:.02em;color:var(--line-500)}

.hdr-tools{margin-left:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hdr-search{position:relative;display:flex;align-items:center;flex:0 1 auto}
.hdr-search-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.hdr-search-input{width:206px;height:44px;padding:0 12px 0 36px;background:rgba(14,46,78,.9);border:1px solid rgba(107,122,140,.45);border-radius:4px 12px 4px 12px;color:var(--gray-100);font-size:14px;transition:border-color .18s var(--ease),background-color .18s var(--ease)}
.hdr-search-input::placeholder{color:#8496A8}
.hdr-search-input:hover{border-color:rgba(35,224,208,.5)}
.hdr-search-input:focus{border-color:var(--cyan-400);background:rgba(14,46,78,1)}
.hdr-search::before{content:"";position:absolute;left:12px;top:50%;width:11px;height:11px;margin-top:-8px;border:2px solid var(--cyan-400);border-radius:50%;pointer-events:none}
.hdr-search::after{content:"";position:absolute;left:23px;top:50%;width:6px;height:2px;margin-top:1px;background:var(--cyan-400);transform:rotate(45deg);transform-origin:left center;pointer-events:none}

.hdr-watch{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 13px;background:rgba(35,224,208,.1);border:1px solid rgba(35,224,208,.34);border-radius:4px 12px 4px 12px;color:var(--cyan-400);font-family:var(--font-head);font-weight:700;font-size:14px;letter-spacing:.02em;transition:background-color .18s var(--ease),border-color .18s var(--ease)}
.hdr-watch:hover{background:rgba(35,224,208,.19);border-color:var(--cyan-400)}
.hdr-watch-label{white-space:nowrap}
.hdr-watch-count{display:grid;place-items:center;min-width:22px;height:22px;padding:0 5px;background:var(--cyan-400);color:#04141C;border-radius:999px;font-family:var(--font-mono);font-size:12px;font-weight:700}

.hdr-rank{display:inline-flex;align-items:center;min-height:44px;padding:0 20px;background:var(--orange-500);color:#150900;font-family:var(--font-head);font-weight:800;font-size:15px;letter-spacing:.03em;border-radius:4px 4px 4px 14px;clip-path:polygon(0 0,100% 0,calc(100% - 13px) 100%,0 100%);transition:background-color .18s var(--ease),color .18s var(--ease)}
.hdr-rank:hover{background:var(--orange-200)}

.nav-toggle{display:none;align-items:center;gap:10px;min-height:44px;min-width:44px;padding:0 14px;background:var(--blue-700);border:1px solid rgba(107,122,140,.5);border-radius:4px 12px 4px 12px;color:var(--gray-100);font-family:var(--font-head);font-weight:700;font-size:14px;letter-spacing:.04em;transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease)}
.nav-toggle-bars{display:grid;gap:4px;width:18px}
.nav-toggle-bars span{display:block;height:2px;border-radius:2px;background:currentColor}
.nav-toggle-bars span:nth-child(2){width:70%}
.nav-toggle-text{white-space:nowrap}
.nav-toggle[aria-expanded="true"]{background:var(--orange-500);border-color:var(--orange-500);color:#150900}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}

.site-nav{position:relative;z-index:55;background:linear-gradient(180deg,var(--blue-700),#0B2743);box-shadow:inset 0 1px 0 rgba(7,26,47,.9),inset 0 -1px 0 rgba(35,224,208,.18)}
.nav-inner{display:flex;align-items:center;gap:14px 22px;flex-wrap:wrap;min-height:56px;padding-block:6px}
.nav-list{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav-item{flex:0 0 auto}
.nav-link{position:relative;display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:4px;color:#C3D4E4;font-family:var(--font-head);font-weight:700;font-size:15px;letter-spacing:.02em;transition:color .16s var(--ease),background-color .16s var(--ease)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:7px;height:2px;background:transparent;border-radius:2px;transition:background-color .16s var(--ease)}
.nav-link:hover{color:#fff;background:rgba(255,106,31,.12)}
.nav-link[aria-current="page"]{color:#fff;background:rgba(255,106,31,.17)}
.nav-link[aria-current="page"]::after{background:var(--orange-500)}

.nav-legend{margin-left:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.legend-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--line-500);margin-right:2px;white-space:nowrap}
.legend-chip{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;background:rgba(7,26,47,.6);border:1px solid rgba(107,122,140,.35);border-radius:999px;color:#A9BCCF;font-family:var(--font-sans);font-weight:700;font-size:13px;letter-spacing:.03em;transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease)}
.legend-chip:hover{color:#fff;border-color:var(--orange-200)}
.legend-chip[aria-pressed="true"]{background:var(--orange-500);border-color:var(--orange-500);color:#150900}

.site-footer{position:relative;margin-top:clamp(48px,7vw,88px);background:var(--blue-800);color:#B9C9D9;border-top:1px solid rgba(107,122,140,.3)}
.ft-rail{height:8px;background-color:var(--blue-700);background-image:repeating-linear-gradient(90deg,rgba(35,224,208,.55) 0 2px,transparent 2px 22px);border-bottom:2px solid var(--orange-500)}

.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px 32px;padding-block:clamp(36px,5vw,56px) clamp(28px,4vw,44px)}

.ft-brand{display:grid;align-content:start;gap:14px;min-width:0}
.ft-brand-name{font-family:var(--font-head);font-weight:800;font-size:21px;letter-spacing:-.01em;color:#fff;line-height:1.2}
.ft-brand-desc{font-size:14px;line-height:1.7;color:#93A7BA;max-width:32ch}
.ft-cta{justify-self:start;margin-top:2px;clip-path:polygon(0 0,100% 0,calc(100% - 11px) 100%,0 100%);border-radius:4px 4px 4px 12px}

.ft-col{min-width:0}
.ft-col-title{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-weight:700;font-size:11px;line-height:1;letter-spacing:.16em;text-transform:uppercase;color:var(--orange-200);margin-bottom:14px}
.ft-col-title::before{content:"";width:6px;height:6px;background:var(--cyan-400);border-radius:50%;flex:0 0 auto}

.ft-links{display:grid;gap:2px}
.ft-links a{display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:#B9C9D9;transition:color .16s var(--ease)}
.ft-links a:hover{color:var(--cyan-400)}

.ft-contact{display:grid;gap:12px}
.ft-contact-item{display:grid;grid-template-columns:52px 1fr;gap:10px;align-items:start;font-size:14px;line-height:1.65}
.ft-contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--line-500);padding-top:4px}
.ft-contact-val{color:#D3E0EC;word-break:break-word}

.ft-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px 28px;padding-block:18px 26px;border-top:1px solid rgba(107,122,140,.26);font-size:13px;line-height:1.6;color:#8FA2B5}
.ft-legal{margin:0}
.ft-legal a{display:inline-flex;align-items:center;min-height:32px;color:var(--cyan-400);border-bottom:1px solid rgba(35,224,208,.3)}
.ft-legal a:hover{color:#fff;border-bottom-color:#fff}
.ft-sign{margin:0;font-variant-numeric:tabular-nums}
.ft-top{display:inline-flex;align-items:center;gap:8px;margin-left:auto;min-height:44px;padding:0 16px;background:rgba(14,46,78,.7);border:1px solid rgba(107,122,140,.45);border-radius:4px 12px 4px 12px;color:#C6D6E6;font-family:var(--font-head);font-weight:700;font-size:13px;letter-spacing:.04em;transition:color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease)}
.ft-top::after{content:"↑";font-family:var(--font-mono);font-size:12px}
.ft-top:hover{color:#fff;border-color:var(--cyan-400);transform:translateY(-2px)}

@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
  .has-js .reveal{opacity:0;transform:translateY(16px);transition:opacity .26s var(--ease),transform .26s var(--ease)}
}
.reveal.is-in{opacity:1;transform:none}

@media (max-width:1199px){
  .legend-label{display:none}
  .ft-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px 28px}
  .ft-brand{grid-column:1 / -1}
  .ft-brand-desc{max-width:56ch}
}

@media (max-width:1023px){
  .hdr-search-input{width:180px}
  .nav-legend{margin-left:0}
}

@media (max-width:959px){
  .site-header::before{height:3px}
  .hdr-top-inner{row-gap:12px}
  .brand{order:1}
  .nav-toggle{display:inline-flex;order:2;margin-left:auto}
  .hdr-tools{order:3;flex:1 1 100%;margin-left:0}
  .hdr-search{flex:1 1 190px}
  .hdr-search-input{width:100%}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;max-height:76vh;overflow-y:auto;border-bottom:2px solid var(--orange-500);box-shadow:0 22px 44px rgba(2,10,18,.55)}
  .site-nav[data-open]{display:block}
  .nav-inner{flex-direction:column;align-items:stretch;gap:0;padding-block:8px 18px}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(107,122,140,.24)}
  .nav-link{width:100%;justify-content:flex-start;min-height:48px;padding:0 6px;border-radius:0}
  .nav-link::after{left:6px;right:auto;bottom:50%;width:0;height:16px;margin-bottom:-8px;transition:width .18s var(--ease)}
  .nav-link[aria-current="page"]::after{width:4px}
  .nav-link[aria-current="page"]{background:rgba(255,106,31,.1)}
  .nav-legend{margin:14px 0 0;padding-inline:6px;gap:8px}
  .legend-label{display:block;flex:1 1 100%;margin:0 0 4px}
  .ft-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .ft-brand{grid-column:1 / -1}
  .ft-top{margin-left:0}
}

@media (max-width:639px){
  body{font-size:16px}
  .brand-line{display:none}
  .brand-name{font-size:18px}
  .hdr-watch-label{display:none}
  .hdr-watch{padding:0 10px}
  .hdr-rank{padding:0 16px;font-size:14px}
  .ft-grid{grid-template-columns:1fr;gap:28px;padding-block:36px 28px}
  .ft-links a{min-height:44px}
  .ft-meta{flex-direction:column;align-items:flex-start;gap:10px}
  .ft-top{margin-left:0;margin-top:6px}
  .media-frame--wide{aspect-ratio:16/9}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}