/* ============================================================
   万博主站 · 共享样式表 /assets/site.css
   01 变量  02 重置  03 排版  04 布局  05 通用组件
   06 刊头  07 页脚  08 工具类  09 响应式  10 动效降级
   ============================================================ */

/* ---------- 01 变量 ---------- */
:root{
  --wb-ink:#070D1B;
  --wb-base:#0F1A32;
  --wb-panel:#172442;
  --wb-line:#2A3A5F;
  --wb-gold:#C08A2E;
  --wb-gold-bright:#E8C87A;
  --wb-cinnabar:#C2452F;
  --wb-paper:#F3EFE6;
  --wb-text:#E6EBF2;
  --wb-muted:#93A0B8;

  --wb-width:1240px;
  --wb-width-wide:1440px;
  --wb-gutter:clamp(20px,4vw,48px);
  --wb-cut:18px;
  --wb-ease:cubic-bezier(.2,.7,.2,1);

  --wb-font-display:"Roboto Condensed","Arial Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --wb-font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wb-font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono","Courier New",monospace;
}

/* ---------- 02 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--wb-base);
  color:var(--wb-text);
  font-family:var(--wb-font-body);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--wb-gold);text-decoration:none;transition:color .2s var(--wb-ease)}
a:hover{color:var(--wb-gold-bright)}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{padding-left:1.2em}
hr{border:0;border-top:1px solid var(--wb-line);margin:0}
:focus-visible{outline:2px solid var(--wb-gold-bright);outline-offset:3px}
::selection{background:var(--wb-gold);color:var(--wb-ink)}

/* ---------- 03 排版 ---------- */
h1,h2,h3,h4{font-family:var(--wb-font-display);font-weight:800;line-height:1.14;letter-spacing:-.01em;color:var(--wb-text)}
h1{font-size:clamp(34px,5.2vw,64px)}
h2{font-size:clamp(26px,3.4vw,42px)}
h3{font-size:clamp(19px,2vw,25px)}
h4{font-size:17px;letter-spacing:0}
p{color:inherit}
.wb-display{font-family:var(--wb-font-display);font-weight:900;font-size:clamp(40px,7vw,86px);line-height:1.04;letter-spacing:-.02em}
.wb-lede{font-size:clamp(17px,1.6vw,20px);line-height:1.8;color:var(--wb-text);max-width:62ch}
.wb-prose{max-width:70ch}
.wb-prose p + p{margin-top:1.2em}
.wb-prose h2,.wb-prose h3{margin-top:1.6em;margin-bottom:.5em}
.wb-eyebrow{font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.22em;color:var(--wb-gold);text-transform:uppercase;display:block;margin-bottom:14px}
.wb-mono{font-family:var(--wb-font-mono);font-size:13px;line-height:1.7;color:var(--wb-muted)}
.wb-note{font-family:var(--wb-font-mono);font-size:13px;line-height:1.75;color:var(--wb-muted);border-left:1px solid var(--wb-line);padding-left:14px}
.wb-tag{display:inline-block;font-family:var(--wb-font-mono);font-size:11px;letter-spacing:.18em;color:var(--wb-gold);border:1px solid var(--wb-line);padding:3px 9px}

/* ---------- 04 布局 ---------- */
.wb-container{width:100%;max-width:var(--wb-width);margin-inline:auto;padding-inline:var(--wb-gutter)}
.wb-section{padding-block:clamp(64px,9vw,150px)}
.wb-section--tight{padding-block:clamp(28px,3.5vw,44px)}
.wb-section--paper{
  --wb-text:#101828;
  --wb-muted:#5A6472;
  --wb-line:#CBD2DD;
  --wb-panel:#FFFFFF;
  background:var(--wb-paper);
  color:var(--wb-text);
}
.wb-section--ink{background:var(--wb-ink)}
.wb-stack{display:grid;gap:clamp(20px,3vw,32px)}
.wb-stack--tight{gap:12px}
.wb-grid{display:grid;gap:clamp(20px,3vw,32px)}
.wb-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.wb-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.wb-grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.wb-split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(24px,4vw,56px);align-items:center}

/* ---------- 05 通用组件 ---------- */
.wb-cut{clip-path:polygon(0 0,calc(100% - var(--wb-cut)) 0,100% var(--wb-cut),100% 100%,var(--wb-cut) 100%,0 calc(100% - var(--wb-cut)))}
.wb-panel{background:var(--wb-panel);border:1px solid var(--wb-line);padding:clamp(20px,2.6vw,32px)}
.wb-panel--cut{--wb-cut:20px;border:0;clip-path:polygon(0 0,calc(100% - var(--wb-cut)) 0,100% var(--wb-cut),100% 100%,var(--wb-cut) 100%,0 calc(100% - var(--wb-cut)));background:var(--wb-panel);padding:clamp(22px,2.8vw,34px)}

.wb-rule{display:flex;align-items:center;gap:14px;margin:0;font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.2em;color:var(--wb-muted)}
.wb-rule::before,.wb-rule::after{content:"";height:1px;flex:1;background-image:repeating-linear-gradient(90deg,var(--wb-line) 0 10px,transparent 10px 18px)}

.wb-btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--wb-font-body);font-size:15px;letter-spacing:.06em;font-weight:600;
  padding:13px 24px;border:1px solid var(--wb-line);background:transparent;color:var(--wb-text);
  cursor:pointer;--wb-cut:12px;
  clip-path:polygon(0 0,calc(100% - var(--wb-cut)) 0,100% var(--wb-cut),100% 100%,var(--wb-cut) 100%,0 calc(100% - var(--wb-cut)));
  transition:background .2s var(--wb-ease),color .2s var(--wb-ease),border-color .2s var(--wb-ease);
}
.wb-btn:hover{background:var(--wb-panel);border-color:var(--wb-gold);color:var(--wb-gold-bright)}
.wb-btn--gold{background:var(--wb-gold);border-color:var(--wb-gold);color:var(--wb-ink)}
.wb-btn--gold:hover{background:var(--wb-gold-bright);border-color:var(--wb-gold-bright);color:var(--wb-ink)}
.wb-btn--ghost{border-color:var(--wb-gold);color:var(--wb-gold)}
.wb-btn--sm{padding:9px 16px;font-size:13px}

.wb-crumb{padding-top:22px;font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.08em;color:var(--wb-muted)}
.wb-crumb__list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.wb-crumb__item:not(:first-child)::before{content:"/";margin-right:8px;color:var(--wb-line)}
.wb-crumb__link{color:var(--wb-muted)}
.wb-crumb__link:hover{color:var(--wb-gold-bright)}

.wb-stat{display:block}
.wb-stat__num{display:block;font-family:var(--wb-font-display);font-variant-numeric:tabular-nums;font-weight:800;font-size:clamp(44px,7vw,120px);line-height:1;letter-spacing:-.02em;color:var(--wb-gold-bright)}
.wb-stat__num--alert{color:var(--wb-cinnabar)}
.wb-stat__unit{font-size:.34em;font-weight:700;color:var(--wb-muted);margin-left:.28em}
.wb-stat__label{display:block;font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.16em;color:var(--wb-muted);margin-top:12px}

.wb-index{list-style:none;margin:0;padding:0;border-top:1px solid var(--wb-line)}
.wb-index__row{display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:16px;align-items:baseline;padding:14px 8px;border-bottom:1px solid var(--wb-line);transition:background .18s var(--wb-ease)}
.wb-index__row:hover{background:var(--wb-panel)}
.wb-index__num{font-family:var(--wb-font-mono);font-size:13px;color:var(--wb-gold)}
.wb-index__title{font-family:var(--wb-font-display);font-weight:700;font-size:18px;color:var(--wb-text)}
.wb-index__title a{color:inherit}
.wb-index__title a:hover{color:var(--wb-gold-bright)}
.wb-index__meta{font-family:var(--wb-font-mono);font-size:12px;color:var(--wb-muted)}

.wb-toc{list-style:none;margin:0;padding:0;border-left:1px solid var(--wb-line)}
.wb-toc__link{display:block;padding:8px 0 8px 14px;font-family:var(--wb-font-mono);font-size:13px;color:var(--wb-muted);border-left:2px solid transparent;margin-left:-1px}
.wb-toc__link:hover{color:var(--wb-text)}
.wb-toc__link[aria-current="true"],.wb-toc__link.is-active{color:var(--wb-gold-bright);border-left-color:var(--wb-gold)}

.wb-filters{display:flex;flex-wrap:wrap;gap:10px}
.wb-chip{font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.14em;padding:8px 15px;border:1px solid var(--wb-line);background:transparent;color:var(--wb-muted);cursor:pointer;transition:color .18s var(--wb-ease),border-color .18s var(--wb-ease),background .18s var(--wb-ease)}
.wb-chip:hover{color:var(--wb-gold-bright);border-color:var(--wb-gold)}
.wb-chip[aria-pressed="true"]{background:var(--wb-gold);border-color:var(--wb-gold);color:var(--wb-ink);font-weight:700}
[data-filter-item].is-filtered{display:none}

.wb-media{margin:0;display:block}
.wb-media__frame{
  position:relative;display:block;width:100%;aspect-ratio:16/9;overflow:hidden;
  background-color:var(--wb-panel);
  background-image:
    linear-gradient(135deg,rgba(192,138,46,.16),transparent 58%),
    repeating-linear-gradient(90deg,rgba(42,58,95,.55) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(0deg,rgba(42,58,95,.55) 0 1px,transparent 1px 40px);
}
.wb-media__frame img{width:100%;height:100%;object-fit:cover}
.wb-media--wide .wb-media__frame{aspect-ratio:21/9}
.wb-media--tall .wb-media__frame{aspect-ratio:3/4}
.wb-media--square .wb-media__frame{aspect-ratio:1/1}
.wb-media--cut .wb-media__frame{--wb-cut:20px;clip-path:polygon(0 0,calc(100% - var(--wb-cut)) 0,100% var(--wb-cut),100% 100%,var(--wb-cut) 100%,0 calc(100% - var(--wb-cut)))}
.wb-media__caption{font-family:var(--wb-font-mono);font-size:12px;color:var(--wb-muted);margin-top:10px}

/* ---------- 06 刊头 ---------- */
.wb-masthead{
  position:sticky;top:0;z-index:80;
  background:rgba(15,26,50,.96);
  border-bottom:1px solid var(--wb-line);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.wb-rail{background:var(--wb-ink);border-bottom:1px solid var(--wb-line);overflow:hidden;max-height:80px;transition:max-height .26s var(--wb-ease),opacity .26s var(--wb-ease)}
.wb-masthead.is-scrolled .wb-rail{max-height:0;opacity:0}
.wb-rail__inner{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 20px;padding-block:8px}
.wb-rail__item{margin:0;font-size:13px;color:var(--wb-muted);display:flex;align-items:center;gap:9px}
.wb-rail__item--mono{font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.14em}
.wb-rail__dot{width:6px;height:6px;background:var(--wb-gold);flex:none;animation:wb-pulse 2.6s var(--wb-ease) infinite}
@keyframes wb-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.72)}}

.wb-masthead__inner{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:16px;padding-block:18px 14px}
.wb-brand{grid-column:2;text-align:center;display:block;color:var(--wb-text)}
.wb-brand:hover{color:var(--wb-text)}
.wb-brand__name{display:block;font-family:var(--wb-font-display);font-weight:900;font-size:clamp(26px,4vw,40px);letter-spacing:.16em;line-height:1.1;color:var(--wb-text)}
.wb-brand__name::after{content:"";display:block;height:2px;width:64px;margin:10px auto 0;background:var(--wb-gold)}
.wb-brand__tag{display:block;font-family:var(--wb-font-mono);font-size:11px;letter-spacing:.2em;color:var(--wb-muted);margin-top:8px}
.wb-masthead__meta{grid-column:3;justify-self:end;margin:0;font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.14em;color:var(--wb-gold);text-align:right}

.wb-nav-toggle{
  grid-column:1;justify-self:start;
  display:none;align-items:center;gap:10px;
  background:transparent;border:1px solid var(--wb-line);color:var(--wb-text);
  font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.16em;
  padding:8px 12px;cursor:pointer;
}
.wb-nav-toggle:hover{border-color:var(--wb-gold);color:var(--wb-gold-bright)}
.wb-nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--wb-gold)}
.wb-nav-toggle__bars::before,.wb-nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--wb-gold);transition:transform .2s var(--wb-ease)}
.wb-nav-toggle__bars::before{top:-6px}
.wb-nav-toggle__bars::after{top:6px}
.wb-nav-toggle[aria-expanded="true"] .wb-nav-toggle__bars{background:transparent}
.wb-nav-toggle[aria-expanded="true"] .wb-nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.wb-nav-toggle[aria-expanded="true"] .wb-nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.wb-nav{border-top:1px solid var(--wb-line)}
.wb-nav__list{display:flex;justify-content:center;align-items:stretch;gap:clamp(18px,3vw,42px);list-style:none;margin:0;padding:0}
.wb-nav__link{
  position:relative;display:block;padding:14px 2px 16px;
  font-size:15px;letter-spacing:.08em;color:var(--wb-muted);
  transition:color .2s var(--wb-ease);
}
.wb-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;
  background:var(--wb-gold);transform:scaleX(0);transform-origin:left center;
  transition:transform .2s var(--wb-ease);
}
.wb-nav__link:hover,.wb-nav__link:focus-visible{color:var(--wb-text)}
.wb-nav__link:hover::after,.wb-nav__link:focus-visible::after{transform:scaleX(1)}
.wb-nav__link[aria-current="page"]{color:var(--wb-gold-bright);font-weight:600}
.wb-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--wb-gold-bright)}

.wb-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(42,58,95,.45);pointer-events:none}
.wb-progress__bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left center;background:linear-gradient(90deg,var(--wb-gold),var(--wb-gold-bright))}

/* ---------- 07 页脚 ---------- */
.wb-foot{background:var(--wb-ink);border-top:1px solid var(--wb-line);margin-top:clamp(72px,9vw,140px);color:var(--wb-text)}
.wb-foot__top{display:grid;grid-template-columns:1.5fr repeat(3,minmax(0,1fr));gap:clamp(24px,4vw,48px);padding-block:clamp(44px,6vw,80px)}
.wb-foot__brand{min-width:0}
.wb-foot__wordmark{display:inline-block;font-family:var(--wb-font-display);font-weight:900;font-size:28px;letter-spacing:.14em;color:var(--wb-text)}
.wb-foot__wordmark:hover{color:var(--wb-gold-bright)}
.wb-foot__tagline{margin-top:12px;font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.16em;color:var(--wb-muted)}
.wb-foot__code{margin-top:8px;font-family:var(--wb-font-mono);font-size:11px;letter-spacing:.2em;color:var(--wb-gold)}
.wb-foot__col{min-width:0}
.wb-foot__title{margin:0 0 14px;font-family:var(--wb-font-mono);font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--wb-gold)}
.wb-foot__list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.wb-foot__link{font-size:15px;color:var(--wb-muted)}
.wb-foot__link:hover{color:var(--wb-gold-bright)}

.wb-foot__contact{border-top:1px solid var(--wb-line);padding-block:22px;display:grid;gap:10px}
.wb-foot__contact-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin:0;font-size:14px;color:var(--wb-muted)}
.wb-foot__contact-k{font-family:var(--wb-font-mono);font-size:11px;letter-spacing:.18em;color:var(--wb-gold);min-width:72px}
.wb-foot__contact-v{font-family:var(--wb-font-mono);font-size:13px;color:var(--wb-text);word-break:break-all}
.wb-foot__service{margin-top:6px;font-family:var(--wb-font-mono);font-size:12px;line-height:1.7;color:var(--wb-muted);max-width:70ch}

.wb-copy{font-family:var(--wb-font-mono);font-size:11px;letter-spacing:.14em;padding:3px 9px;background:transparent;border:1px solid var(--wb-line);color:var(--wb-gold);cursor:pointer;transition:background .18s var(--wb-ease),color .18s var(--wb-ease),border-color .18s var(--wb-ease)}
.wb-copy:hover{border-color:var(--wb-gold);color:var(--wb-gold-bright)}
.wb-copy.is-done{background:var(--wb-gold);border-color:var(--wb-gold);color:var(--wb-ink)}

.wb-foot__bottom{border-top:1px solid var(--wb-line);padding-block:18px 34px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;font-family:var(--wb-font-mono);font-size:12px;color:var(--wb-muted)}
.wb-foot__legal,.wb-foot__copyline{margin:0}

/* ---------- 08 工具类 ---------- */
.wb-skip{position:absolute;left:16px;top:-70px;z-index:200;background:var(--wb-gold);color:var(--wb-ink);font-family:var(--wb-font-mono);font-size:13px;padding:10px 16px;transition:top .2s var(--wb-ease)}
.wb-skip:focus{top:12px;color:var(--wb-ink)}
.wb-visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
#main-content{scroll-margin-top:130px;display:block}
.wb-totop{
  position:fixed;right:clamp(16px,3vw,32px);bottom:clamp(16px,3vw,32px);z-index:70;
  display:inline-flex;align-items:center;gap:8px;padding:10px 16px;
  font-family:var(--wb-font-mono);font-size:12px;letter-spacing:.14em;
  background:var(--wb-panel);color:var(--wb-gold-bright);border:1px solid var(--wb-line);cursor:pointer;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .22s var(--wb-ease),visibility .22s var(--wb-ease),border-color .22s var(--wb-ease);
}
.wb-totop.is-visible{opacity:1;visibility:visible;pointer-events:auto}
.wb-totop:hover{border-color:var(--wb-gold);background:var(--wb-ink)}

.wb-js [data-reveal]{opacity:0;transform:translateY(20px);transition:opacity .42s var(--wb-ease),transform .42s var(--wb-ease)}
.wb-js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 09 响应式 ---------- */
@media (min-width:1500px){
  .wb-container{max-width:var(--wb-width-wide)}
}
@media (max-width:1100px){
  .wb-grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .wb-split{grid-template-columns:1fr;gap:clamp(24px,5vw,40px)}
}
@media (max-width:1024px){
  .wb-foot__top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .wb-foot__brand{grid-column:1/-1}
}
@media (max-width:899px){
  .wb-nav-toggle{display:inline-flex}
  .wb-masthead__meta{display:none}
  .wb-masthead__inner{grid-template-columns:auto 1fr;padding-block:14px}
  .wb-brand{grid-column:2;text-align:center}
  .wb-brand__name::after{margin-inline:auto}
  .wb-nav{display:none;background:var(--wb-ink)}
  .wb-nav[data-open]{display:block;animation:wb-drop .28s var(--wb-ease) both}
  .wb-nav__list{flex-direction:column;gap:0;padding:6px 0 12px}
  .wb-nav__list > li{border-bottom:1px solid var(--wb-line)}
  .wb-nav__list > li:last-child{border-bottom:0}
  .wb-nav__link{padding:14px var(--wb-gutter);font-size:16px;text-align:left}
  .wb-nav__link::after{left:var(--wb-gutter);right:auto;width:30px;bottom:8px}
  .wb-grid--2,.wb-grid--3{grid-template-columns:1fr}
  .wb-grid--12{grid-template-columns:1fr}
  .wb-index__row{grid-template-columns:44px minmax(0,1fr);row-gap:4px}
  .wb-index__meta{grid-column:2}
}
@keyframes wb-drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media (max-width:640px){
  .wb-foot__top{grid-template-columns:1fr;gap:28px}
  .wb-foot__bottom{flex-direction:column}
  .wb-foot__contact-k{min-width:auto}
  .wb-container{padding-inline:20px}
}

/* ---------- 10 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .wb-rail__dot{animation:none}
  .wb-js [data-reveal]{opacity:1;transform:none}
}