/* ============================================================
   必胜28导航 · 共享样式 /assets/site.css
   深墨蓝底 + 荧光青/暖橙撞色 · 锐利直角 · 精密网格
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
img,svg,video{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
input,select,textarea{font:inherit;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}

/* ---------- tokens ---------- */
:root{
  --ink:#0A1A2A;
  --ink-deep:#050D17;
  --cyan:#35F2D6;
  --orange:#FF7A3C;
  --clay:#C2603F;
  --moss:#6E8B62;
  --amber:#FFC64B;
  --stone:#8A97A6;
  --line:#1E3247;
  --paper:#F3EDE2;

  --font-display:"Arial Narrow","Helvetica Neue Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --wrap:1280px;
  --gut:24px;
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:40px;
  --sp-5:64px;
  --sp-6:96px;
}

/* ---------- base ---------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
::selection{background:var(--cyan);color:var(--ink-deep);}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;}

/* ---------- 排版 ---------- */
.t-display{font-family:var(--font-display);font-weight:900;line-height:.96;letter-spacing:-.02em;}
.t-1{font-family:var(--font-display);font-weight:900;line-height:.96;letter-spacing:-.02em;font-size:clamp(44px,7.4vw,72px);}
.t-2{font-family:var(--font-display);font-weight:900;line-height:1;letter-spacing:-.02em;font-size:clamp(34px,5vw,56px);}
.t-3{font-family:var(--font-display);font-weight:900;line-height:1.04;letter-spacing:-.02em;font-size:clamp(28px,3.6vw,44px);}
.t-4{font-family:var(--font-display);font-weight:800;line-height:1.1;letter-spacing:-.01em;font-size:clamp(22px,2.6vw,32px);}

.num{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.03em;line-height:.88;color:var(--cyan);}
.num--xl{font-size:clamp(64px,11vw,112px);}
.num--lg{font-size:clamp(48px,7.5vw,88px);}
.num--md{font-size:clamp(38px,5vw,64px);}

.eyebrow{display:inline-block;font-family:var(--font-display);font-weight:800;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);}
.eyebrow--orange{color:var(--orange);}

.prose{max-width:68ch;}
.prose > * + *{margin-top:1.1em;}
.prose a{border-bottom:1px solid var(--line);}
.prose a:hover{border-bottom-color:var(--cyan);color:var(--cyan);}

.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;}

/* ---------- 容器与网格 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut);}
.section{padding:var(--sp-6) 0;border-top:1px solid var(--line);}
.section--tight{padding:var(--sp-5) 0;border-top:1px solid var(--line);}
.stack{display:grid;gap:var(--gut);}
.divider{height:1px;background:var(--line);border:0;}
.ruler{height:14px;border-bottom:1px solid var(--line);
  background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 12px);}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gut);}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-9{grid-column:span 9;}
.span-12{grid-column:span 12;}

/* ---------- 按钮 / 徽标 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--line);background:transparent;
  font-family:var(--font-display);font-weight:800;font-size:13px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--paper);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateX(2px);}
.btn--cta{background:var(--orange);border-color:var(--orange);color:var(--ink-deep);}
.btn--cta:hover{background:var(--cyan);border-color:var(--cyan);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}

.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 10px;
  border:1px solid currentColor;background:transparent;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;line-height:1;
}
.badge--amber{color:var(--amber);}
.badge--cyan{color:var(--cyan);}
.badge--moss{color:var(--moss);}

/* ---------- 卡片 ---------- */
.card{display:flex;flex-direction:column;gap:14px;padding:var(--sp-3);
  background:var(--ink-deep);border:1px solid var(--line);}
.card--paper{background:var(--paper);color:var(--ink);border-color:var(--paper);}
.card--paper .eyebrow{color:var(--clay);}
.card--accent{border-left:3px solid var(--orange);}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--stone);}
.crumbs__link{color:var(--stone);border-bottom:1px solid transparent;}
.crumbs__link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.crumbs__sep{color:var(--line);}

/* ---------- 图片容器基础（页面阶段放 img） ---------- */
.figure{display:flex;flex-direction:column;border:1px solid var(--line);background:var(--ink-deep);}
.figure__media{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background-color:var(--ink);
  background-image:
    repeating-linear-gradient(90deg,rgba(243,237,226,.06) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(0deg,rgba(243,237,226,.06) 0 1px,transparent 1px 32px);
}
.figure__media img{width:100%;height:100%;object-fit:cover;}
.figure__caption{padding:12px;font-size:13px;color:var(--stone);border-top:1px solid var(--line);}
.figure--wide .figure__media{aspect-ratio:21/9;}
.figure--square .figure__media{aspect-ratio:1/1;}
.figure--tall .figure__media{aspect-ratio:3/4;}

/* ---------- 显现 / 筛选 / 返回顶部 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease;}
[data-reveal].is-visible{opacity:1;transform:none;}

.filter-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.filter-btn{padding:8px 14px;border:1px solid var(--line);
  font-family:var(--font-display);font-weight:800;font-size:13px;letter-spacing:.1em;
  color:var(--stone);transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
.filter-btn:hover{color:var(--paper);border-color:var(--cyan);}
.filter-btn[aria-pressed="true"],.filter-btn.is-active{background:var(--cyan);border-color:var(--cyan);color:var(--ink-deep);}
.filter-count{margin-left:auto;font-family:var(--font-mono);font-size:13px;color:var(--stone);}

.to-top{
  position:fixed;right:18px;bottom:18px;z-index:70;
  width:46px;height:46px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--ink-deep);color:var(--cyan);
  font-family:var(--font-mono);font-size:14px;letter-spacing:.04em;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease,border-color .2s ease;
}
.to-top.is-on{opacity:1;visibility:visible;}
.to-top:hover{border-color:var(--cyan);}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  padding:12px 18px;background:var(--cyan);color:var(--ink-deep);
  font-family:var(--font-display);font-weight:800;font-size:14px;letter-spacing:.1em;
  transform:translateY(-120%);transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0);}

/* ============================================================
   头部 · 紧凑命令栏
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,13,23,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.header-rail{background:var(--ink);border-bottom:1px solid var(--line);}
.header-rail__inner{
  display:flex;align-items:center;gap:14px;min-height:34px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--stone);
}
.rail-index{color:var(--amber);font-weight:700;letter-spacing:.04em;}
.rail-note{position:relative;padding-left:14px;}
.rail-note::before{content:"";position:absolute;left:0;top:50%;width:6px;height:1px;background:var(--line);}
.rail-link{margin-left:auto;color:var(--cyan);border-bottom:1px solid transparent;}
.rail-link:hover{border-bottom-color:var(--cyan);}

.header-bar{
  display:flex;align-items:center;gap:20px;
  padding-top:12px;padding-bottom:12px;
}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  padding:8px 10px;background:var(--cyan);color:var(--ink-deep);
  font-family:var(--font-mono);font-weight:700;font-size:22px;line-height:1;letter-spacing:-.04em;
}
.brand__text{display:flex;flex-direction:column;gap:3px;}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:20px;line-height:1;letter-spacing:.02em;color:var(--paper);}
.brand__tag{font-size:12px;line-height:1.2;letter-spacing:.1em;color:var(--stone);}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:10px 12px;border:1px solid var(--line);
  font-family:var(--font-display);font-weight:800;font-size:13px;letter-spacing:.12em;color:var(--paper);
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px;}
.nav-toggle__bars i{display:block;height:2px;width:100%;background:var(--cyan);transition:transform .2s ease,opacity .2s ease;}
.site-header[data-open] .nav-toggle{border-color:var(--cyan);color:var(--cyan);}
.site-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

.nav{display:flex;align-items:center;gap:16px;margin-left:auto;}
.nav__list{display:flex;align-items:stretch;}
.nav__item{display:flex;}
.nav__link{
  display:flex;align-items:baseline;gap:7px;
  padding:10px 13px;border-left:1px solid var(--line);
  font-size:15px;font-weight:500;color:var(--stone);
  transition:color .18s ease,background-color .18s ease;
}
.nav__item:first-child .nav__link{border-left:0;}
.nav__idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--cyan);opacity:.75;}
.nav__label{white-space:nowrap;}
.nav__link:hover{color:var(--paper);background:rgba(53,242,214,.07);}
.nav__link:hover .nav__idx{opacity:1;}
.nav__link[aria-current="page"]{background:var(--cyan);color:var(--ink-deep);}
.nav__link[aria-current="page"] .nav__idx{color:var(--ink-deep);opacity:.8;}
.nav__cta{margin-left:6px;white-space:nowrap;}

.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden;}
.progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--cyan),var(--orange));}

/* ============================================================
   页脚 · 三层结构
   ============================================================ */
.site-footer{position:relative;margin-top:var(--sp-6);background:var(--ink-deep);border-top:1px solid var(--line);}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;width:180px;height:3px;background:var(--orange);}

.footer-top{
  display:grid;grid-template-columns:minmax(240px,1.5fr) 1fr 1.3fr;
  gap:var(--sp-4);padding:var(--sp-5) 0 var(--sp-4);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px;}
.footer-brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  padding:6px 9px;border:1px solid var(--line);border-left:3px solid var(--orange);
  font-family:var(--font-mono);font-weight:700;font-size:18px;line-height:1;color:var(--cyan);
}
.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:24px;line-height:1;letter-spacing:.02em;color:var(--paper);}
.footer-brand__summary{max-width:38ch;font-size:15px;line-height:1.7;color:var(--stone);}

.footer-heading{
  padding-bottom:8px;margin-bottom:14px;border-bottom:1px solid var(--line);
  font-family:var(--font-display);font-weight:800;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--stone);
}
.footer-nav__list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 20px;}
.footer-link{font-size:15px;color:var(--paper);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease;}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}

.footer-contact__list{display:grid;gap:10px;font-size:15px;}
.footer-contact__list li{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;}
.footer-contact__key{
  flex:0 0 52px;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--stone);
}
.footer-contact__val{color:var(--paper);word-break:break-word;}
.footer-contact__note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--stone);}

.footer-legal{border-top:1px solid var(--line);background:rgba(10,26,42,.6);}
.footer-legal__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;
  padding:16px 0;font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:var(--stone);
}
.footer-legal__icp{color:var(--stone);}
.footer-legal__region{color:var(--moss);}
.footer-legal__copy{margin-left:auto;color:var(--stone);}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .footer-top{grid-template-columns:minmax(220px,1fr) 1fr;}
  .footer-contact{grid-column:1 / -1;}
  .footer-contact__list{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:1000px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-3{grid-column:span 3;}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 6;}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .nav{
    position:absolute;left:0;right:0;top:100%;
    display:grid;gap:16px;margin-left:0;
    padding:20px var(--gut) 28px;
    background:var(--ink-deep);
    border-top:1px solid var(--line);
    border-bottom:2px solid var(--cyan);
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s linear;
  }
  .site-header[data-open] .nav{opacity:1;visibility:visible;transform:translateY(0);}
  .nav__list{flex-direction:column;border-top:1px solid var(--line);}
  .nav__item{width:100%;}
  .nav__link{
    width:100%;justify-content:flex-start;padding:14px 4px;
    border-left:0;border-bottom:1px solid var(--line);font-size:16px;
  }
  .nav__link[aria-current="page"]{padding-left:12px;}
  .nav__cta{width:100%;}
  .rail-note{display:none;}
}

@media (max-width:760px){
  :root{--gut:16px;--sp-5:48px;--sp-6:64px;}
  body{font-size:16px;line-height:1.7;}
  .footer-top{grid-template-columns:1fr;gap:var(--sp-4);}
  .footer-contact__list{grid-template-columns:1fr;}
  .footer-legal__copy{margin-left:0;}
  .brand__tag{display:none;}
  .header-bar{gap:12px;}
}

@media (max-width:640px){
  .grid{grid-template-columns:minmax(0,1fr);}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 1;}
  .footer-nav__list{grid-template-columns:1fr;}
  .filter-count{margin-left:0;width:100%;}
}

/* ---------- 可访问性与动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  [data-reveal]{opacity:1;transform:none;}
}