/* =========================================================
   诺亚竞界 · Site Kit
   文件：/assets/site.css
   设计：赛场雷达控制台 · 数据终端 · 低密度大留白
   ========================================================= */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{min-height:100vh;font-family:var(--font-body);font-size:16px;line-height:1.75;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
main{display:block}
img,picture,video,canvas,svg{display:block;max-width:100%;height:auto}
a{color:var(--color-orange);text-underline-offset:4px;text-decoration-thickness:2px;transition:color .3s ease}
a:hover{color:var(--color-cyan)}
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);line-height:1.25;font-weight:800;color:var(--color-space)}
p{margin-bottom:1em}
ul,ol{padding-left:1.4em}
button{font-family:inherit}
::selection{background:var(--color-orange);color:var(--color-space)}

/* ---------- CSS Variables ---------- */
:root{
  --color-space:#0B1B3D;
  --color-ice:#F0F2F6;
  --color-orange:#FF6B00;
  --color-cyan:#00E5FF;
  --color-green:#39FF14;
  --color-purple:#7B4BFF;
  --color-navy:#1B3358;
  --color-gray:#7A8A9A;
  --color-red:#FF2D2D;
  --color-line:#24406B;
  --color-white:#F4F7FB;

  --color-bg:var(--color-ice);
  --color-bg-dark:var(--color-space);
  --color-text:#16233F;
  --color-text-reverse:var(--color-white);

  --font-head:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-data:'JetBrains Mono','SF Mono','Menlo','Consolas',monospace;

  --container-w:1280px;
  --header-h:80px;
  --radius:16px;
  --radius-sm:8px;

  --shadow-card:0 2px 16px rgba(11,27,61,.08);
  --shadow-lift:0 16px 40px rgba(11,27,61,.16);
}

/* ---------- Main / Container ---------- */
#main-content{display:block;min-height:70vh;outline:none}
.container{width:100%;max-width:var(--container-w);margin-inline:auto;padding-inline:32px}
@media(max-width:640px){.container{padding-inline:20px}}

/* ---------- Skip Link / Focus ---------- */
.skip-link{position:fixed;left:-9999px;top:0;z-index:200;display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--color-orange);color:var(--color-space);font-weight:800;text-decoration:none;border-radius:0 0 8px 0}
.skip-link:hover{color:var(--color-space)}
.skip-link:focus{left:0;color:var(--color-space)}
:focus-visible{outline:3px solid var(--color-orange);outline-offset:3px;border-radius:4px}

/* ---------- Header Control Deck ---------- */
.site-header{position:sticky;top:0;z-index:100;background:linear-gradient(180deg,var(--color-space) 0%,#0E2148 100%);isolation:isolate}
.site-header::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(115deg,transparent 0,transparent 40px,rgba(0,229,255,.035) 40px,rgba(0,229,255,.035) 41px);pointer-events:none}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:50px;background:linear-gradient(180deg,transparent,rgba(11,27,61,.5));pointer-events:none}
.header-laser{position:absolute;top:0;left:0;right:0;height:3px;z-index:3;background:linear-gradient(90deg,var(--color-orange) 0,var(--color-orange) 18%,var(--color-cyan) 18%,var(--color-cyan) 36%,var(--color-purple) 36%,var(--color-purple) 56%,var(--color-green) 56%,var(--color-green) 72%,transparent 72%,transparent 100%);background-size:260px 100%;animation:laser-scan 8s linear infinite}
@keyframes laser-scan{0%{background-position:0 0}100%{background-position:260px 0}}
.header-inner{position:relative;z-index:2;width:100%;padding-inline:48px;min-height:var(--header-h);display:flex;align-items:center;gap:20px}

/* Brand */
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;font-family:var(--font-data);font-size:22px;font-weight:800;background:linear-gradient(135deg,var(--color-orange) 0,var(--color-orange) 58%,var(--color-cyan) 58%,var(--color-cyan) 100%);color:var(--color-space);clip-path:polygon(0 0,calc(100% - 11px) 0,100% 11px,100% 100%,11px 100%,0 calc(100% - 11px))}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-logo{font-size:24px;font-weight:900;letter-spacing:.1em;color:var(--color-white)}
.brand-sub{font-family:var(--font-data);font-size:10px;letter-spacing:.28em;text-transform:uppercase;color:var(--color-cyan)}

/* Navigation */
.main-nav{margin-left:auto;display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:0;list-style:none;padding:0;margin:0}
.nav-list>li{position:relative;margin:0}
.nav-list>li+li::before{content:"";position:absolute;left:-2px;top:50%;transform:translateY(-50%);width:1px;height:18px;background:var(--color-line)}
.nav-link{position:relative;display:inline-block;padding:10px 14px;font-size:15px;font-weight:600;color:var(--color-white);text-decoration:none;white-space:nowrap;transition:color .3s ease}
.nav-link::before{content:attr(data-nav-index);font-family:var(--font-data);font-size:10px;font-weight:400;color:var(--color-cyan);vertical-align:super;margin-right:4px;opacity:.7}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:3px;background:var(--color-orange);transform:skewX(-30deg) scaleX(0);transform-origin:left center;transition:transform .3s ease}
.nav-link:hover{color:var(--color-orange)}
.nav-link:hover::before{color:var(--color-orange);opacity:1}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:skewX(-30deg) scaleX(1)}
.nav-link[aria-current="page"]{color:var(--color-orange)}
.nav-link[aria-current="page"]::before{color:var(--color-orange);opacity:1}

/* Header Meta */
.header-meta{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;background:rgba(11,27,61,.65);border:1px solid var(--color-line);border-radius:999px;white-space:nowrap;flex-shrink:0}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--color-red);box-shadow:0 0 10px rgba(255,45,45,.8);animation:live-pulse 1.6s ease-in-out infinite}
.live-clock{font-family:var(--font-data);font-size:12px;color:var(--color-white);letter-spacing:.04em;display:inline-block;min-width:140px}
@keyframes live-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}

/* Nav Toggle */
.nav-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:10px 12px;background:transparent;border:1px solid var(--color-line);border-radius:var(--radius-sm);cursor:pointer;flex-shrink:0;color:var(--color-white)}
.nav-toggle-box{display:flex;flex-direction:column;gap:5px;width:22px;height:18px}
.nav-toggle-bar{display:block;width:100%;height:2px;background:var(--color-orange);transition:transform .3s ease,opacity .3s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(7px) 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(-7px) rotate(-45deg)}
.nav-toggle-label{font-size:10px;font-weight:700;letter-spacing:.14em;color:var(--color-white)}

/* Scroll Progress */
.scroll-progress{position:absolute;left:0;bottom:0;width:100%;height:3px;background:rgba(36,64,107,.5);pointer-events:none;z-index:6}
.scroll-progress-bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--color-orange),var(--color-cyan) 70%,var(--color-green));box-shadow:0 0 12px rgba(0,229,255,.45)}

/* ---------- Footer Data Terminal ---------- */
.site-footer{position:relative;background:var(--color-bg-dark);color:var(--color-white);margin-top:96px}
.site-footer::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--color-line) 1px,transparent 1px),linear-gradient(90deg,var(--color-line) 1px,transparent 1px);background-size:48px 48px;opacity:.35;pointer-events:none}
.footer-laser{position:relative;height:3px;background:linear-gradient(90deg,transparent,var(--color-cyan) 20%,var(--color-purple) 45%,var(--color-orange) 75%,transparent)}
.footer-inner{position:relative;max-width:var(--container-w);margin-inline:auto;padding:72px 32px 56px}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:48px}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-logo{display:inline-flex;align-items:center;gap:12px;margin-bottom:20px;font-size:26px;font-weight:900;letter-spacing:.12em;color:var(--color-white);text-decoration:none}
.footer-logo:hover{color:var(--color-cyan)}
.footer-logo-mark{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;font-family:var(--font-data);font-size:20px;font-weight:800;color:var(--color-space);background:linear-gradient(135deg,var(--color-orange),var(--color-cyan));clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px))}
.footer-about{font-size:14px;line-height:1.8;color:rgba(244,247,251,.78);max-width:380px;margin:0 0 16px}
.footer-trust{margin:0;max-width:380px;padding-left:14px;border-left:2px solid var(--color-cyan);font-size:12px;line-height:1.7;color:var(--color-gray)}
.footer-col{position:relative;min-width:0}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--color-cyan);margin:0 0 20px;padding-bottom:10px;border-bottom:1px solid var(--color-line);position:relative}
.footer-title::after{content:"";position:absolute;left:0;bottom:-1px;width:32px;height:2px;background:var(--color-orange)}
.footer-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer-list a{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:rgba(244,247,251,.75);text-decoration:none;transition:color .3s ease,transform .3s ease}
.footer-list a::before{content:"›";font-family:var(--font-data);color:var(--color-orange);font-weight:700}
.footer-list a:hover{color:var(--color-orange);transform:translateX(4px)}
.footer-contact{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.footer-contact li{display:grid;grid-template-columns:56px 1fr;gap:8px;font-size:13px}
.footer-contact-label{font-family:var(--font-data);font-size:11px;letter-spacing:.1em;color:var(--color-gray);padding-top:2px}
.footer-contact-text{color:rgba(244,247,251,.85);line-height:1.6}
.footer-bottom{position:relative;border-top:1px solid var(--color-line);background:rgba(0,0,0,.18)}
.footer-bottom-inner{max-width:var(--container-w);margin-inline:auto;padding:20px 32px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 24px;font-size:12px;color:var(--color-gray)}
.footer-copy{font-family:var(--font-data);margin:0}
.footer-icp{margin:0;font-size:12px}
.footer-support{margin:4px 0 0;flex-basis:100%;text-align:right;font-size:12px;color:rgba(122,138,154,.75)}

/* ---------- Back Top ---------- */
.back-top{position:fixed;right:28px;bottom:28px;z-index:90;width:52px;height:52px;display:inline-flex;align-items:center;justify-content:center;background:var(--color-orange);color:var(--color-space);border:none;cursor:pointer;clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));opacity:0;transform:translateY(20px);pointer-events:none;transition:opacity .3s ease,transform .3s ease,background .3s ease}
.back-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.back-top:hover{background:var(--color-cyan)}
.back-top-icon{font-size:22px;font-weight:900;line-height:1}

/* ---------- Section System ---------- */
.section{position:relative;padding:80px 0}
.section--tight{padding:48px 0}
.section--dark{background:var(--color-bg-dark);color:var(--color-white)}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:var(--color-white)}
.section-head{max-width:720px;margin-bottom:40px}
.section-eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;font-family:var(--font-data);font-size:12px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--color-cyan)}
.section-eyebrow::before{content:"";width:26px;height:2px;background:var(--color-orange)}
.section-title{font-size:clamp(28px,4vw,40px);font-weight:900;letter-spacing:.02em;line-height:1.2}
.section-desc{margin-top:12px;font-size:15px;color:var(--color-gray);max-width:560px}
.section--dark .section-desc{color:rgba(244,247,251,.65)}

/* ---------- Page Header / Breadcrumb ---------- */
.page-header{position:relative;padding:64px 0 56px;background:linear-gradient(120deg,var(--color-space) 0,#0B1B3D 68%,#132B58 100%);overflow:hidden}
.page-header::before{content:"";position:absolute;top:-40px;right:-20px;width:260px;height:260px;border-radius:46% 54% 62% 38%/52% 48% 52% 48%;background:var(--color-purple);opacity:.15;filter:blur(48px);pointer-events:none}
.page-header::after{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(115deg,transparent 0,transparent 36px,rgba(0,229,255,.04) 36px,rgba(0,229,255,.04) 37px);pointer-events:none}
.page-header-inner{position:relative;z-index:1;max-width:var(--container-w);margin-inline:auto;padding-inline:32px}
.page-title{font-size:clamp(36px,6vw,56px);font-weight:900;letter-spacing:.02em;line-height:1.15;color:var(--color-white);margin:12px 0 8px}
.page-subtitle{font-size:17px;line-height:1.7;color:rgba(244,247,251,.72);max-width:640px;margin-bottom:0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:rgba(244,247,251,.55);margin:0 0 4px}
.breadcrumb a{color:rgba(244,247,251,.55);text-decoration:none;font-weight:500;transition:color .3s}
.breadcrumb a:hover{color:var(--color-orange)}
.breadcrumb-item{display:inline-flex;align-items:center}
.breadcrumb-item+.breadcrumb-item::before{content:"//";color:var(--color-orange);font-family:var(--font-data);font-size:11px;margin-right:6px;opacity:.7}
.breadcrumb-item[aria-current="page"]{color:var(--color-white);font-weight:600}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 28px;font-family:var(--font-head);font-size:15px;font-weight:700;letter-spacing:.06em;text-decoration:none;cursor:pointer;border:none;border-radius:6px;transition:transform .3s ease,box-shadow .3s ease,background .3s ease,color .3s ease;white-space:nowrap}
.btn-primary{background:var(--color-orange);color:var(--color-space);clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px))}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(255,107,0,.4);color:var(--color-space)}
.btn-ghost{background:transparent;color:var(--color-space);box-shadow:inset 0 0 0 2px var(--color-space)}
.btn-ghost:hover{background:var(--color-space);color:var(--color-white);transform:translateY(-2px)}
.btn-light{background:var(--color-white);color:var(--color-space);clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px))}
.btn-light:hover{background:var(--color-cyan);color:var(--color-space);transform:translateY(-2px)}

/* ---------- Grid ---------- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* ---------- Cards ---------- */
.card{position:relative;background:var(--color-white);border:1px solid rgba(11,27,61,.08);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-card);transition:transform .3s ease,box-shadow .3s ease}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lift),0 0 0 1px rgba(0,229,255,.55)}
.card--dark{background:var(--color-navy);border-color:var(--color-line);color:var(--color-white)}
.card--dark h3,.card--dark h4{color:var(--color-white)}
.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.card-title{font-size:20px;font-weight:800;line-height:1.4}
.card-body{font-size:14px;color:var(--color-gray)}
.card--dark .card-body{color:rgba(244,247,251,.68)}

/* ---------- Data & Badge ---------- */
.data-text{font-family:var(--font-data);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.data-text--lg{font-size:36px;font-weight:700;line-height:1.1;color:var(--color-space)}
.data-text--green{color:var(--color-green)}
.data-text--orange{color:var(--color-orange)}
.data-text--cyan{color:var(--color-cyan)}
.live-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;font-family:var(--font-data);font-size:12px;font-weight:700;letter-spacing:.12em;background:var(--color-red);color:#fff;border-radius:4px}
.live-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;animation:live-pulse 1.2s infinite}

/* ---------- Frame & Image Ratio ---------- */
.frame-window{position:relative;padding:28px;background:var(--color-bg-dark);border:1px solid var(--color-line);border-radius:6px;box-shadow:inset 0 0 60px rgba(0,229,255,.05)}
.frame-window::before,.frame-window::after{content:"";position:absolute;width:24px;height:24px;border-color:var(--color-orange);border-style:solid}
.frame-window::before{top:-1px;left:-1px;border-width:3px 0 0 3px}
.frame-window::after{bottom:-1px;right:-1px;border-width:0 3px 3px 0}
.img-ratio{position:relative;overflow:hidden;border-radius:var(--radius);background:var(--color-navy)}
.img-ratio::before{content:"";display:block}
.img-ratio--16x9::before{padding-top:56.25%}
.img-ratio--4x3::before{padding-top:75%}
.img-ratio--1x1::before{padding-top:100%}
.img-ratio--3x4::before{padding-top:133.34%}
.img-ratio img,.img-ratio-placeholder{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.img-ratio-placeholder{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-navy),var(--color-space));color:var(--color-cyan);font-family:var(--font-data);font-size:13px;letter-spacing:.24em;text-transform:uppercase}

/* ---------- Decorations ---------- */
.speed-lines{position:absolute;inset:0;pointer-events:none;background-image:repeating-linear-gradient(-12deg,transparent 0,transparent 24px,rgba(0,229,255,.055) 24px,rgba(0,229,255,.055) 25px)}
.blob{position:absolute;border-radius:42% 58% 63% 37%/54% 45% 55% 46%;filter:blur(44px);opacity:.2;pointer-events:none}
.blob--cyan{background:var(--color-cyan)}
.blob--purple{background:var(--color-purple)}
.blob--orange{background:var(--color-orange)}

/* ---------- Reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
[data-reveal].is-visible{opacity:1;transform:translateY(0)}

/* ---------- Responsive ---------- */
@media(max-width:1199px){
  .header-meta{display:none}
  .footer-grid{grid-template-columns:2fr 1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .footer-col--nav{grid-column:1/2}
  .footer-col--legal{grid-column:2/3}
  .footer-col--contact{grid-column:3/4}
}

@media(max-width:1100px){
  .nav-toggle{display:inline-flex;margin-left:auto}
  .main-nav{position:fixed;top:var(--header-h);right:0;bottom:0;width:min(400px,88vw);background:linear-gradient(180deg,var(--color-space),#0A1630);border-left:1px solid var(--color-line);margin-left:0;flex-direction:column;align-items:stretch;padding:40px 28px;transform:translateX(102%);transition:transform .45s cubic-bezier(.16,1,.3,1),opacity .3s ease;box-shadow:-16px 0 40px rgba(0,0,0,.3);overflow-y:auto;pointer-events:none;opacity:0}
  .main-nav[data-open]{transform:translateX(0);pointer-events:auto;opacity:1}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-list>li{width:100%;border-bottom:1px solid rgba(36,64,107,.6)}
  .nav-list>li+li::before{display:none}
  .nav-link{display:block;padding:18px 8px;font-size:18px;width:100%}
}

@media(max-width:991px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:760px){
  .header-inner{padding-inline:20px}
  .brand-logo{font-size:20px}
  .brand-sub{font-size:9px;letter-spacing:.2em}
  .brand-mark{width:40px;height:40px;font-size:20px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-col{grid-column:auto!important}
  .footer-brand{grid-column:auto!important}
  .footer-inner{padding:48px 20px 40px}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start;gap:8px;padding:16px 20px}
  .footer-support{text-align:left}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .section{padding:56px 0}
  .page-header{padding:48px 0 40px}
  .page-header-inner{padding-inline:20px}
  .back-top{right:16px;bottom:16px;width:46px;height:46px}
}

/* ---------- Reduced Motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .header-laser{animation:none}
  .live-dot{animation:none}
  .live-badge::before{animation:none}
}