*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scrollbar-color:var(--ink-700) var(--paper-100)}
body{min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden;font-family:"Open Sans","思源黑体","Source Han Sans CN","Noto Sans CJK SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:16px;line-height:1.7;color:var(--ink-700);background-color:var(--paper-50);-webkit-font-smoothing:antialiased}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
ul[class],ol[class]{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
address{font-style:normal}
h1,h2,h3,h4,h5,h6{font-family:"Anton","思源黑体","Source Han Sans CN","Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;font-weight:900;line-height:1.12;letter-spacing:.01em;text-wrap:balance;color:var(--ink-900)}
p{text-wrap:pretty}
:root{--ink-900:#061327;--ink-700:#0A1F44;--paper-50:#FDFCF8;--paper-100:#F5F0E6;--accent-500:#FF6B35;--gold-400:#FFD700;--steel-400:#6A7A99;--success-500:#1CBF73;--alert-500:#E33E3E;--radius-pill:999px;--radius-card:18px;--shadow-offset:6px 6px 0 rgba(6,19,39,.12);--shadow-offset-lg:10px 10px 0 rgba(6,19,39,.18)}
#main-content{flex:1 0 auto;outline:none}
[id]{scroll-margin-top:120px}
:focus-visible{outline:3px solid var(--gold-400);outline-offset:3px;border-radius:6px}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:1320px;margin:0 auto;padding-left:24px;padding-right:24px}
.skip-link{position:fixed;top:12px;left:12px;z-index:500;display:inline-flex;padding:10px 18px;background:var(--gold-400);color:var(--ink-900);font-size:14px;font-weight:800;border:2px solid var(--ink-900);border-radius:var(--radius-pill);pointer-events:auto;transform:translateY(-180%);transition:transform .25s ease}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:10px;z-index:200;padding:0 16px 10px;pointer-events:none}
.nav-capsule{position:relative;max-width:1320px;margin:0 auto;display:flex;align-items:center;gap:10px;padding:10px 12px 10px 24px;border-radius:var(--radius-pill);background:rgba(10,31,68,.84);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.14);box-shadow:0 8px 30px rgba(6,19,39,.32);pointer-events:auto;transition:background-color .3s ease,box-shadow .3s ease}
.site-header.is-scrolled .nav-capsule{background:rgba(6,19,39,.96);box-shadow:0 12px 36px rgba(6,19,39,.46)}
.nav-brand{display:inline-flex;align-items:baseline;gap:10px;flex-shrink:0;white-space:nowrap}
.nav-logo{font-family:"Anton","思源黑体","Source Han Sans CN",sans-serif;font-size:22px;font-weight:900;line-height:1;letter-spacing:.03em;color:#fff}
.nav-logo em{font-style:normal;color:var(--gold-400)}
.nav-tagline{font-size:11px;font-weight:600;letter-spacing:.28em;color:rgba(255,255,255,.62);text-transform:uppercase}
.nav-panel{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{display:inline-block;padding:10px 14px;font-size:14px;font-weight:700;line-height:1;letter-spacing:.02em;color:rgba(255,255,255,.82);border-radius:var(--radius-pill);transition:background-color .2s ease,color .2s ease,box-shadow .2s ease}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.12)}
.nav-link[aria-current="page"]{background:var(--accent-500);color:#fff;box-shadow:0 2px 0 var(--gold-400)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:6px;flex-shrink:0}
.nav-badge{display:inline-block;padding:5px 10px;font-size:11px;font-weight:800;line-height:1;letter-spacing:.1em;color:var(--gold-400);border:1px solid var(--gold-400);border-radius:var(--radius-pill);white-space:nowrap}
.nav-actions .btn{padding:11px 22px;font-size:13px;border-color:#fff;box-shadow:3px 3px 0 rgba(6,19,39,.9)}
.nav-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:6px;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.24);transition:background-color .2s ease}
.nav-toggle:hover{background:rgba(255,255,255,.2)}
.nav-toggle-bar{display:block;width:20px;height:2px;background:#fff;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;font-size:14px;font-weight:800;line-height:1;letter-spacing:.04em;border:2px solid transparent;border-radius:var(--radius-pill);transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease}
.btn:hover{transform:translate(-1px,-1px)}
.btn:active{transform:translate(1px,1px);box-shadow:0 0 0 transparent}
.btn-accent{background:var(--accent-500);color:#fff;border-color:var(--ink-900);box-shadow:4px 4px 0 rgba(6,19,39,.85)}
.btn-accent:hover{background:#ff7d4d;box-shadow:5px 5px 0 rgba(6,19,39,.9)}
.btn-primary{background:var(--ink-700);color:var(--paper-50);border-color:var(--ink-900);box-shadow:4px 4px 0 var(--accent-500)}
.btn-primary:hover{background:var(--ink-900)}
.btn-ghost{background:transparent;color:var(--ink-700);border-color:var(--ink-700);box-shadow:3px 3px 0 rgba(10,31,68,.25)}
.btn-ghost:hover{background:var(--paper-100)}
.btn-sm{padding:10px 18px;font-size:13px}
.site-footer{position:relative;margin-top:80px;background-color:var(--ink-900);color:rgba(255,255,255,.76);border-top:6px solid var(--accent-500);overflow:hidden}
.site-footer h1,.site-footer h2,.site-footer h3,.site-footer h4{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:48px;padding:56px 0 40px}
.footer-brand{font-family:"Anton","思源黑体","Source Han Sans CN",sans-serif;font-size:30px;font-weight:900;line-height:1;letter-spacing:.04em;color:#fff}
.footer-brand em{font-style:normal;color:var(--gold-400)}
.footer-tagline{display:inline-block;margin-top:8px;font-size:11px;font-weight:700;letter-spacing:.3em;color:var(--gold-400);text-transform:uppercase}
.footer-about{margin-top:18px;max-width:36em;font-size:15px;line-height:1.8;color:rgba(255,255,255,.7)}
.footer-trust{margin-top:20px;padding:14px 16px;max-width:44em;font-size:12.5px;line-height:1.8;color:var(--steel-400);background:rgba(255,255,255,.04);border:1px solid rgba(255,215,0,.35);border-radius:12px}
.footer-title{margin-bottom:18px;font-size:14px;font-weight:800;letter-spacing:.16em;color:var(--gold-400);text-transform:uppercase}
.footer-links li+li{margin-top:10px}
.footer-links a{display:inline-block;font-size:14.5px;color:rgba(255,255,255,.74);transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--accent-500);transform:translateX(3px)}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact-line{display:block;font-size:14px;line-height:1.7;color:rgba(255,255,255,.7)}
.footer-contact-line strong{color:#fff;font-weight:700}
.footer-legal{display:flex;flex-wrap:wrap;gap:14px;margin-top:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}
.footer-legal a{display:inline-block;font-size:13.5px;font-weight:700;color:var(--gold-400);border-bottom:2px solid transparent;transition:border-color .2s ease,color .2s ease}
.footer-legal a:hover{border-bottom-color:var(--gold-400);color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:18px 0;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(255,255,255,.48)}
.footer-version{font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.3);text-transform:uppercase}
.section{padding:64px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px 24px;margin-bottom:32px}
.section-head-titles{flex:1 1 20em}
.section-extra{flex:0 1 auto}
.section-kicker{display:inline-block;margin-bottom:8px;font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--accent-500);text-transform:uppercase}
.section-title{font-size:clamp(30px,4vw,46px);line-height:1.08;max-width:20em}
.page-hero{position:relative;padding:64px 0 48px;overflow:hidden;isolation:isolate}
.page-hero::before{content:"";position:absolute;top:0;right:0;width:min(38%,460px);height:100%;background:var(--ink-700);clip-path:polygon(28% 0,100% 0,100% 100%,0 100%);z-index:-1}
.page-hero::after{content:"";position:absolute;top:0;right:0;width:min(38%,460px);height:100%;background:repeating-linear-gradient(135deg,transparent 0 16px,rgba(255,215,0,.22) 16px 18px);clip-path:polygon(28% 0,100% 0,100% 100%,0 100%);z-index:-1}
.page-title{font-size:clamp(36px,5vw,56px);line-height:1.05;max-width:18em}
.page-lead{margin-top:12px;font-size:18px;line-height:1.7;color:var(--steel-400);max-width:60ch}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:24px;font-size:13px;font-weight:600;color:var(--steel-400)}
.breadcrumb a{transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent-500)}
.breadcrumb-item+.breadcrumb-item::before{content:"/";margin-right:8px;color:var(--steel-400);opacity:.6}
.breadcrumb [aria-current="page"]{color:var(--ink-700)}
.grid{display:grid;gap:24px}
.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))}
.card{padding:24px;background:var(--paper-50);border:2px solid var(--ink-900);border-radius:var(--radius-card);box-shadow:var(--shadow-offset);transition:transform .25s ease,box-shadow .25s ease}
.card:hover{transform:translate(-2px,-2px);box-shadow:var(--shadow-offset-lg)}
.figure-image{position:relative;overflow:hidden;background:repeating-linear-gradient(-7deg,transparent 0 14px,rgba(10,31,68,.06) 14px 28px),var(--paper-100);border:3px solid var(--ink-900);border-radius:14px;box-shadow:8px 8px 0 rgba(6,19,39,.14);aspect-ratio:16/9}
.figure-image::after{content:"IMG · 16:9";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;letter-spacing:.16em;color:var(--steel-400)}
.figure-image--wide{aspect-ratio:21/9}
.figure-image--wide::after{content:"IMG · 21:9"}
.figure-image--tall{aspect-ratio:3/4}
.figure-image--tall::after{content:"IMG · 3:4"}
.data-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:800;line-height:1;border:1.5px solid currentColor;border-radius:999px;background:rgba(255,255,255,.6)}
.data-tag--success{color:var(--success-500)}
.data-tag--alert{color:var(--alert-500)}
.data-tag--info{color:var(--ink-700)}
.slash-separator{position:relative;height:24px;overflow:hidden;pointer-events:none}
.slash-separator::before{content:"";position:absolute;top:50%;left:-3%;width:106%;height:3px;background:var(--ink-700);transform:rotate(-7deg)}
.speed-line{position:relative;overflow:hidden}
.speed-line::after{content:"";position:absolute;top:0;right:-18%;width:42%;height:100%;background:repeating-linear-gradient(135deg,transparent 0 16px,rgba(255,107,53,.16) 16px 18px);transform:skewX(-7deg);pointer-events:none}
.content-block{max-width:72ch;font-size:16.5px;line-height:1.85}
.content-block p+p{margin-top:16px}
.content-block h2{margin-top:40px;font-size:28px}
.content-block blockquote{margin:24px 0;padding:16px 20px;border-left:4px solid var(--accent-500);background:var(--paper-100);border-radius:0 12px 12px 0;font-weight:700;color:var(--ink-700)}
.content-block hr{margin:32px 0;border:0;border-top:3px solid var(--ink-900)}
.scroll-progress{position:fixed;top:0;left:0;width:0;height:4px;background:linear-gradient(90deg,var(--accent-500),var(--gold-400));z-index:400;pointer-events:none}
.back-to-top{position:fixed;right:24px;bottom:24px;z-index:300;display:flex;align-items:center;justify-content:center;width:52px;height:52px;font-size:22px;color:#fff;background:var(--accent-500);border:2px solid var(--ink-900);border-radius:50%;box-shadow:4px 4px 0 rgba(6,19,39,.85);opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .3s ease,transform .3s ease,box-shadow .2s ease,background-color .2s ease}
.back-to-top:hover{background:#ff8255;box-shadow:5px 5px 0 rgba(6,19,39,.9);transform:translateY(-1px)}
.back-to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
@media (max-width:1023px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-panel{display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;padding:16px;background:rgba(6,19,39,.97);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border:1px solid rgba(255,215,0,.3);border-radius:22px;box-shadow:0 18px 40px rgba(6,19,39,.5)}
  .nav-panel[data-open]{display:block}
  .nav-panel .nav-list{flex-direction:column;align-items:stretch;gap:4px;margin:0}
  .nav-link{display:block;padding:13px 16px;font-size:16px;text-align:left}
  .nav-link[aria-current="page"]{background:var(--accent-500)}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:600px){
  .nav-badge{display:none}
  .nav-actions .btn{padding:10px 16px;font-size:12px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:40px 0 32px}
  .section{padding:40px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .page-hero{padding:48px 0 36px}
}
@media (max-width:480px){
  .nav-tagline{display:none}
  .nav-capsule{padding-left:18px;gap:8px}
  .back-to-top{right:16px;bottom:16px;width:46px;height:46px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  html{scroll-behavior:auto}
}