/* =========================================================
   万搏官网 · 共享样式 /assets/site.css
   年鉴铭牌体系：墨黑 / 宣纸白 / 焰橙 / 深靛蓝 / 电光青 / 铜金
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0E0F12;
  --char:#1C1E22;
  --paper:#F3F0E9;
  --mist:#DFDCD4;
  --flame:#FF5A1F;
  --flame-soft:#FF8A4C;
  --indigo:#16225A;
  --cyan:#00C2B2;
  --copper:#A8814A;
  --slate:#5C666B;

  --line:rgba(168,129,74,.42);
  --line-cool:rgba(92,102,107,.30);
  --line-dark:rgba(243,240,233,.16);
  --paper-80:rgba(243,240,233,.80);
  --paper-70:rgba(243,240,233,.70);
  --paper-55:rgba(243,240,233,.55);

  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono","Roboto Mono",Menlo,Consolas,"Courier New",monospace;

  --shell:1240px;
  --gutter:clamp(16px,4vw,48px);
  --stack-gap:16px;
  --ease:.18s ease;
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
body,button,input{font-family:var(--font-body)}
img,svg,video{max-width:100%;display:block}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-head);font-weight:800;line-height:1.1;letter-spacing:-.02em}
h1{font-size:clamp(38px,6.4vw,76px)}
h2{font-size:clamp(28px,4vw,52px)}
h3{font-size:clamp(20px,2.4vw,28px)}
p{margin:0 0 1em}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
hr{border:0}
b,strong{font-weight:700}
[hidden]{display:none !important}

:focus-visible{outline:2px solid var(--flame);outline-offset:3px}
#main-content{scroll-margin-top:96px}

.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  padding:11px 20px;
  background:var(--flame);color:#fff;
  font-size:13px;letter-spacing:.14em;
  transform:translateY(-140%);
  transition:transform var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 3. 容器 / 分区 / 网格 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}

.section{padding:clamp(56px,8vw,112px) 0;position:relative}
.section--dark{background:var(--ink);color:var(--paper)}
.section--char{background:var(--char);color:var(--paper)}
.section--mist{background:var(--mist)}
.section--dark .lead,.section--char .lead{color:var(--paper-80)}
.section--dark .rule,.section--char .rule{background:var(--line-dark)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,34px)}
.span-2{grid-column:span 2}
.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-10{grid-column:span 10}
.span-12{grid-column:span 12}

.stack{display:grid;gap:var(--stack-gap)}
.measure{max-width:42ch}

/* ---------- 4. 文字层级 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.18em;
  color:var(--flame);
}
.eyebrow::before{content:"";width:34px;height:1px;background:currentColor;opacity:.75}
.rule{height:1px;background:var(--line);margin:0}
.lead{font-size:clamp(17px,1.6vw,21px);line-height:1.65;color:var(--char);max-width:42ch}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 10px;border:1px solid var(--copper);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.12em;color:var(--copper);
}
.tag--flame{border-color:var(--flame);color:var(--flame)}
.section--dark .tag{border-color:rgba(168,129,74,.7);color:var(--flame-soft)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  padding:12px 22px;
  border:1px solid var(--ink);
  background:transparent;color:var(--ink);
  font-size:14px;font-weight:600;letter-spacing:.06em;line-height:1.2;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--flame{background:var(--flame);border-color:var(--flame);color:#fff}
.btn--flame:hover{background:var(--flame-soft);border-color:var(--flame-soft)}
.btn--ink{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn--ink:hover{background:var(--indigo);border-color:var(--indigo)}
.btn--ghost{border-color:currentColor;color:inherit}
.btn--ghost:hover{background:rgba(255,90,31,.12);border-color:var(--flame);color:var(--flame)}

/* ---------- 6. 面包屑 / 信息块 / 数据条 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4em;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;color:var(--slate);
}
.crumbs__item{display:inline-flex;align-items:center;gap:.4em}
.crumbs__item::after{content:"/";color:var(--copper)}
.crumbs__item:last-child::after{content:""}
.crumbs a:hover{color:var(--flame)}
.section--dark .crumbs,.section--char .crumbs{color:var(--paper-55)}

.panel{
  border:1px solid var(--line);
  background:var(--paper);
  padding:clamp(18px,2.6vw,32px);
}
.section--dark .panel,.section--char .panel{background:var(--char);border-color:var(--line-dark)}

.data-rail{
  overflow-x:auto;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.section--dark .data-rail,.section--char .data-rail{border-color:var(--line-dark)}
.data-rail__track{
  display:flex;align-items:flex-end;gap:clamp(22px,4vw,60px);
  padding:18px 0;min-width:max-content;
}
.stat{display:flex;flex-direction:column;gap:6px;min-width:140px}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(30px,4vw,52px);line-height:1;
  color:var(--flame);letter-spacing:-.01em;
}
.stat__label{font-size:12px;letter-spacing:.16em;color:var(--slate)}
.section--dark .stat__label,.section--char .stat__label{color:var(--paper-55)}

/* ---------- 7. 图片容器（页面阶段放置占位图） ---------- */
.media{
  position:relative;overflow:hidden;
  background:var(--char);
  border:1px solid var(--line);
  margin:0;
}
.media--slant{clip-path:polygon(0 4%,100% 0,100% 96%,0 100%)}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__img{
  width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .55s ease;
}
.media:hover .media__img{transform:scale(1.02)}
.media__mask{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(14,15,18,.05) 34%,rgba(14,15,18,.74) 100%);
}
.media__cap{
  position:absolute;left:0;bottom:0;right:0;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;color:var(--paper-80);
}

/* ---------- 8. 显现动画（无脚本可读） ---------- */
.reveal{opacity:1;transform:none;transition:opacity .5s ease,transform .5s ease}
[data-motion="on"] .reveal{opacity:0;transform:translateY(12px)}
[data-motion="on"] .reveal[data-in]{opacity:1;transform:none}

/* =========================================================
   9. 头部命令栏
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(243,240,233,.955);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--ink);
  color:var(--ink);
}
.site-header::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--flame) 0%,var(--flame) 26%,var(--cyan) 62%,var(--indigo) 100%);
}

.cmd-bar{
  display:flex;align-items:center;
  gap:clamp(10px,1.6vw,24px);
  min-height:74px;
  padding-top:12px;padding-bottom:10px;
}

/* 品牌铭牌 */
.brand-lockup{
  display:flex;align-items:center;gap:12px;flex:0 0 auto;
  padding-right:clamp(10px,1.4vw,20px);
  border-right:1px solid var(--line-cool);
}
.brand-mark{
  font-family:var(--font-head);
  font-weight:900;font-size:22px;line-height:1;letter-spacing:.04em;
  padding:7px 9px;
  background:var(--ink);color:var(--paper);
  transition:background var(--ease),color var(--ease);
}
.brand-lockup:hover .brand-mark{background:var(--flame);color:#fff}
.brand-meta{display:flex;flex-direction:column;gap:3px;line-height:1.15}
.brand-name{font-size:12px;letter-spacing:.2em;color:var(--slate)}
.brand-since{font-size:11px;letter-spacing:.14em;color:var(--copper)}

/* 压缩态章节指示 */
.chapter-flag{
  display:none;align-items:center;gap:8px;margin:0;
  padding-right:14px;
  border-right:1px solid var(--line-cool);
  font-size:12px;letter-spacing:.14em;color:var(--slate);
  white-space:nowrap;
}
.chapter-flag__idx{color:var(--flame);font-size:12px}
.chapter-flag__name{color:var(--char)}

/* 索引式导航 */
.cmd-nav{flex:1 1 auto;min-width:0}
.cmd-nav__list{display:flex;align-items:stretch;flex-wrap:nowrap}
.cmd-nav__item{display:flex}
.cmd-nav__link{
  display:flex;align-items:center;gap:6px;
  padding:11px 11px;
  font-size:14px;line-height:1.2;color:var(--char);
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.cmd-nav__idx{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.06em;color:var(--copper);
  transition:color var(--ease);
}
.cmd-nav__link:hover{background:var(--mist);border-bottom-color:var(--flame)}
.cmd-nav__link:hover .cmd-nav__idx{color:var(--flame)}
.cmd-nav__link[aria-current="page"]{color:var(--flame);border-bottom-color:var(--flame)}
.cmd-nav__link[aria-current="page"] .cmd-nav__idx{color:var(--flame)}

/* 右侧工具区 */
.cmd-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.cmd-util-group{display:flex;align-items:center;gap:2px}
.cmd-util{
  display:inline-flex;align-items:center;
  padding:8px 10px;
  border:1px solid transparent;
  font-size:12px;letter-spacing:.12em;color:var(--slate);
  white-space:nowrap;
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.cmd-util:hover{color:var(--ink);border-color:var(--copper)}
.cmd-util--btn{background:none}
.cmd-cta{padding:10px 18px;font-size:13px;white-space:nowrap}

/* 移动目录按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 13px;
  border:1px solid var(--ink);
  font-size:13px;letter-spacing:.12em;color:var(--ink);
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--ink)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  transition:transform var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* 站内速查面板 */
.quick-index{
  position:absolute;left:0;right:0;top:100%;
  background:var(--ink);color:var(--paper);
  border-top:1px solid var(--copper);
  border-bottom:1px solid var(--indigo);
}
.quick-index__inner{
  display:grid;gap:14px;
  padding-top:22px;padding-bottom:26px;
}
.quick-index__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--cyan)}
.quick-index__input{
  width:100%;
  padding:12px 14px;
  background:transparent;
  border:1px solid rgba(243,240,233,.28);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:15px;letter-spacing:.06em;
}
.quick-index__input::placeholder{color:rgba(243,240,233,.42)}
.quick-index__input:focus{border-color:var(--flame)}
.quick-index__list{display:flex;flex-wrap:wrap;gap:8px}
.quick-index__item{display:flex}
.quick-index__link{
  display:block;
  padding:8px 13px;
  border:1px solid rgba(243,240,233,.22);
  font-size:13px;letter-spacing:.08em;color:var(--paper-80);
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.quick-index__link:hover{background:rgba(255,90,31,.16);border-color:var(--flame);color:#fff}
.quick-index__empty{margin:0;font-size:13px;letter-spacing:.08em;color:var(--flame-soft)}

/* 阅读进度 */
.read-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px}
.read-progress__bar{
  display:block;height:100%;width:0;
  background:var(--cyan);
  transition:width .12s linear;
}

/* 压缩态 */
.site-header[data-compact] .cmd-bar{min-height:56px;padding-top:5px;padding-bottom:4px}
.site-header[data-compact] .brand-meta{display:none}
.site-header[data-compact] .cmd-util-group{display:none}
.site-header[data-compact] .cmd-nav__link{padding-top:8px;padding-bottom:8px}
.site-header[data-compact] .chapter-flag:not([hidden]){display:flex}

/* =========================================================
   10. 页脚
   ========================================================= */
.site-footer{
  position:relative;
  background:var(--ink);color:var(--paper);
  border-top:1px solid var(--copper);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:5px;
  background-image:repeating-linear-gradient(90deg,var(--flame) 0 5px,transparent 5px 15px);
  opacity:.75;
}
.foot-top{
  display:grid;
  grid-template-columns:1.1fr 1.7fr 1.25fr;
  gap:clamp(24px,3.4vw,56px);
  padding:clamp(44px,6vw,76px) 0 clamp(28px,4vw,48px);
}
.foot-brand__mark{
  margin:0 0 12px;
  font-family:var(--font-head);font-weight:900;
  font-size:clamp(24px,2.6vw,32px);line-height:1.1;letter-spacing:.04em;
  color:var(--paper);
}
.foot-brand__dot{color:var(--flame);margin:0 8px}
.foot-brand__line{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.18em;color:var(--cyan);
}
.foot-brand__closing{
  margin:0;max-width:34ch;
  font-size:14px;line-height:1.75;color:var(--paper-55);
}

.foot-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.2vw,32px)}
.foot-nav__title{
  margin:0 0 14px;
  font-size:12px;font-weight:700;letter-spacing:.2em;
  color:var(--copper);
  padding-bottom:8px;border-bottom:1px solid var(--line-dark);
}
.foot-nav__list{display:grid;gap:10px}
.foot-link{
  display:inline-block;
  font-size:14px;color:var(--paper-80);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color var(--ease),border-color var(--ease);
}
.foot-link:hover{color:var(--flame);border-bottom-color:var(--flame)}

.foot-contact{
  display:grid;gap:12px;align-content:start;
  padding:clamp(18px,2vw,24px);
  background:linear-gradient(180deg,rgba(22,34,90,.62),rgba(22,34,90,.14));
  border-left:2px solid var(--cyan);
}
.foot-contact__item{margin:0;display:grid;gap:4px}
.foot-contact__label{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.2em;color:var(--cyan);
}
.foot-contact__value{font-size:14px;line-height:1.6;color:var(--paper);word-break:break-word}
.foot-note{
  margin:6px 0 0;padding-top:12px;
  border-top:1px solid var(--line-dark);
  font-size:12px;line-height:1.75;color:var(--paper-55);
}

.foot-base{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding:18px 0 36px;
  border-top:1px solid var(--line-dark);
  font-size:12px;letter-spacing:.06em;color:var(--paper-55);
}
.foot-icp{margin:0;font-family:var(--font-mono);letter-spacing:.08em}
.foot-legal{display:flex;flex-wrap:wrap;gap:18px}
.foot-legal .foot-link{font-size:12px}
.foot-copy{margin:0 0 0 auto;font-family:var(--font-mono);color:var(--copper)}

/* =========================================================
   11. 响应式
   ========================================================= */
@media (max-width:1180px){
  .cmd-util-group{display:none}
}

@media (max-width:980px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  [class*="span-"]{grid-column:span 6}

  .cmd-bar{gap:12px;min-height:64px}
  .brand-lockup{border-right:0;padding-right:0;margin-right:auto}
  .brand-meta{display:none}
  .chapter-flag{display:none !important}
  .nav-toggle{display:inline-flex}
  .cmd-cta{padding:9px 14px;font-size:12px}

  .cmd-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    max-height:calc(100vh - 64px);overflow-y:auto;
    padding:12px var(--gutter) 26px;
    background:var(--ink);
    border-top:1px solid var(--copper);
    border-bottom:1px solid var(--indigo);
  }
  .cmd-nav[data-open]{display:block}
  .cmd-nav__list{flex-direction:column}
  .cmd-nav__item{display:block}
  .cmd-nav__link{
    justify-content:flex-start;
    padding:15px 4px;
    font-size:16px;
    color:var(--paper);
    border-bottom:1px solid var(--line-dark);
  }
  .cmd-nav__idx{color:var(--flame-soft);font-size:12px}
  .cmd-nav__link:hover{background:rgba(243,240,233,.06);border-bottom-color:var(--flame)}
  .cmd-nav__link[aria-current="page"]{
    color:var(--flame);
    background:rgba(255,90,31,.10);
    border-bottom-color:var(--flame);
  }
  .cmd-nav__link[aria-current="page"] .cmd-nav__idx{color:var(--flame)}

  .foot-top{grid-template-columns:1fr;gap:32px}
  .foot-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-copy{margin-left:0}
}

@media (max-width:640px){
  body{font-size:16px}
  .cmd-cta{display:none}
  .quick-index__inner{padding-top:18px;padding-bottom:22px}
  .foot-nav{grid-template-columns:1fr}
  .foot-base{flex-direction:column;align-items:flex-start;gap:12px}
  .stat__value{font-size:32px}
}

/* ---------- 12. 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;
  }
  .reveal,.media__img{opacity:1 !important;transform:none !important}
}