/* ==========================================================================
   18新利赛场 · 共享外壳与基础组件
   /assets/site.css
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --sea:#0B1F33;
  --ink-blue:#123253;
  --cream:#F4EFE6;
  --paper:#FBF8F2;
  --orange:#FF6A1A;
  --orange-deep:#E2570C;
  --mint:#4FD1A5;
  --amber:#F2B705;
  --red:#E23A2E;
  --ink:#2A2320;
  --graphite:#5C6672;
  --line:#28466B;
  --steel:#7C93A9;
  --soft:#AFC0D2;

  --rail-w:0px;
  --bar-h:56px;
  --gut:20px;
  --maxw:1280px;
  --radius:2px;

  --sans:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--sea)}
body,figure,blockquote,dl,dd,h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
input,select,textarea{font:inherit}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--cream);
  padding-top:var(--bar-h);
  padding-left:var(--rail-w);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-weight:900;line-height:1.15;letter-spacing:.03em;color:var(--ink)}
h1{font-size:clamp(28px,4.4vw,60px)}
h2{font-size:clamp(24px,3.2vw,40px)}
h3{font-size:clamp(19px,2.2vw,26px)}
h4{font-size:18px;letter-spacing:.02em}
strong{font-weight:700}
.mono{
  font-family:var(--mono);
  font-size:.94em;
  font-weight:500;
  letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
}
.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;
}
::selection{background:var(--orange);color:#FFF6EF}

:focus-visible{outline:3px solid var(--mint);outline-offset:2px}
.frame-rail :focus-visible,
.site-footer :focus-visible{outline-color:var(--orange)}

/* ---------- 4. 跳过链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:400;
  transform:translateY(-180%);
  background:var(--orange);color:#FFF6EF;
  padding:10px 18px;border-radius:var(--radius);
  font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 5. 顶部细条（框架上边） ---------- */
.site-header{position:relative;z-index:120}

.frame-bar{
  position:fixed;top:0;left:0;right:0;
  height:var(--bar-h);
  display:flex;align-items:center;gap:16px;
  padding:0 20px;
  background:var(--sea);
  border-bottom:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--steel);
}
.frame-bar__brand{
  display:inline-block;
  font-family:var(--sans);
  font-size:16px;font-weight:900;letter-spacing:.08em;
  text-transform:none;
  color:var(--cream);
  white-space:nowrap;
}
.frame-bar__note{display:none;color:var(--cream);letter-spacing:.24em}
.frame-bar__live{display:none;align-items:center;gap:8px;color:var(--mint);letter-spacing:.1em}
.frame-bar__dot{
  width:7px;height:7px;border-radius:50%;background:var(--mint);
  animation:pulse 2.2s ease-in-out infinite;
  flex:none;
}
.frame-bar__meta{display:none;margin-left:auto;color:var(--steel);white-space:nowrap}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.35;transform:scale(.82)}
}

/* 移动导航按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  margin-left:auto;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--cream);
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px;flex:none}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform .25s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* ---------- 6. 左侧框架栏 / 移动抽屉 ---------- */
.frame-rail{
  position:fixed;
  top:var(--bar-h);left:0;bottom:0;
  width:100%;
  display:flex;flex-direction:column;gap:20px;
  padding:22px 20px 34px;
  background:var(--sea);
  border-right:1px solid var(--line);
  overflow-y:auto;
  z-index:120;
  transform:translateY(-10px);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
}
.site-header[data-open] .frame-rail{
  transform:none;opacity:1;visibility:visible;pointer-events:auto;
}
body.is-nav-open{overflow:hidden}

.brand{display:flex;align-items:center;gap:12px;color:var(--cream)}
.brand__mark{
  display:grid;place-items:center;
  width:36px;height:36px;flex:none;
  border:1px solid var(--orange);
  color:var(--orange);
  font-family:var(--mono);font-size:13px;font-weight:500;letter-spacing:0;
}
.brand__name{
  font-size:20px;font-weight:900;letter-spacing:.08em;line-height:1.2;
}
.brand__tag{
  margin-top:-12px;
  font-size:12px;letter-spacing:.06em;color:var(--steel);
}

.nav{width:100%}
.nav__list{
  display:flex;flex-direction:column;gap:2px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.nav__item{margin:0}
.nav__link{
  display:flex;align-items:baseline;gap:12px;
  padding:9px 10px 9px 12px;
  border-left:2px solid transparent;
  color:var(--soft);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav__link:hover{color:var(--cream);background:rgba(255,106,26,.08)}
.nav__link[aria-current="page"],
.nav__link[aria-current="true"]{
  color:var(--cream);
  border-left-color:var(--orange);
  background:rgba(255,106,26,.12);
}
.nav__index{
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--steel);
}
.nav__link[aria-current="page"] .nav__index,
.nav__link[aria-current="true"] .nav__index{color:var(--orange)}

.rail-quick{
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.rail-quick__title{
  margin-bottom:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--steel);
}
.rail-quick__list{display:flex;flex-direction:column;gap:9px}
.rail-quick__link{
  display:inline-block;
  font-size:14px;color:var(--soft);
  padding-bottom:2px;
  border-bottom:1px dashed var(--line);
  transition:color .2s ease,border-color .2s ease;
}
.rail-quick__link:hover{color:var(--orange);border-bottom-color:var(--orange)}

.rail-foot{
  margin-top:auto;
  display:flex;flex-direction:column;gap:6px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--steel);
}
.rail-foot__mono{color:var(--mint)}

/* ---------- 7. 页脚（框架下边） ---------- */
.site-footer{
  position:relative;
  background:var(--sea);
  color:#B9C7D6;
  border-top:1px solid var(--line);
}
.site-footer::after{
  content:"";position:absolute;top:-1px;left:0;width:104px;height:3px;background:var(--orange);
}
.footer__inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--gut) 34px;
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(28px,5vw,64px);
}
.footer__brand{max-width:46ch}
.footer__logo{
  font-size:22px;font-weight:900;letter-spacing:.08em;color:var(--cream);
  margin-bottom:8px;
}
.footer__tag{
  margin-bottom:16px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--orange);
}
.footer__lead{
  margin-bottom:22px;
  font-size:15px;line-height:1.8;color:#A9B9CA;
}
.footer__cols{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
}
.footer__col-title{
  margin-bottom:14px;
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--mint);
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__link{
  font-size:15px;color:#B9C7D6;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .2s ease,border-color .2s ease;
}
.footer__link:hover{color:var(--cream);border-bottom-color:var(--orange)}
.footer__link[aria-current="page"]{color:var(--orange);border-bottom-color:var(--orange)}
.footer__info{display:flex;flex-direction:column;gap:10px;font-size:14px;line-height:1.7;color:#9FB0C2}
.footer__info-item{overflow-wrap:anywhere}
.footer__legal{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px var(--gut) 30px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--steel);
}
.footer__legal-line{margin:0}
.footer__closing{margin:0;color:#8FA2B5}

/* ---------- 8. 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:var(--gut);
  padding-right:var(--gut);
}
.section{padding-top:clamp(48px,7vw,96px);padding-bottom:clamp(48px,7vw,96px)}
.section__head{max-width:44em;margin-bottom:clamp(24px,3vw,40px)}
.section__title{margin-bottom:14px}
.section__lead{font-size:17px;line-height:1.85;color:#4A4A48;max-width:34em}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  margin-bottom:14px;
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--orange-deep);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange)}

.prose{font-size:17px;line-height:1.85;color:var(--ink)}
.prose p{margin-bottom:1.1em;max-width:38em}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{margin:1.6em 0 .6em;max-width:34em}
.lead{font-size:clamp(17px,2vw,20px);line-height:1.8;color:#3D3A37;max-width:34em}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.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-12{grid-column:span 12}

.slash-divider{
  height:clamp(32px,6vw,72px);
  background:var(--sea);
  clip-path:polygon(0 44%,100% 0,100% 100%,0 100%);
  margin:0;
}
.slash-divider--flip{clip-path:polygon(0 0,100% 44%,100% 100%,0 100%)}

.marker{position:relative;padding-left:18px}
.marker::before{
  content:"";position:absolute;left:0;top:.4em;bottom:.4em;width:3px;background:var(--orange);
}

/* ---------- 9. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:15px;font-weight:700;letter-spacing:.06em;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#FFF6EF}
.btn--primary:hover{background:var(--orange-deep);border-color:var(--orange-deep)}
.btn--outline{background:transparent;border-color:var(--line);color:var(--sea)}
.btn--outline:hover{border-color:var(--orange);color:var(--orange-deep)}
.btn--ghost{background:transparent;border-color:rgba(244,239,230,.34);color:var(--cream)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange)}

/* ---------- 10. 卡片与面板 ---------- */
.card{
  position:relative;
  background:var(--paper);
  border:1px solid rgba(40,70,107,.28);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,26px);
  transition:transform .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--orange)}
.card--panel{background:var(--ink-blue);border-color:var(--line);color:#DCE6F0}
.card--marker{border-left:3px solid var(--orange)}
.card--tilt{transform:rotate(-1.2deg)}
.card--tilt:hover{transform:rotate(-1.2deg) translateY(-2px)}
.card__title{
  margin-bottom:10px;
  font-size:20px;font-weight:700;letter-spacing:.03em;color:var(--ink);
}
.card--panel .card__title{color:var(--paper)}
.card__text{font-size:15.5px;line-height:1.8;color:#3D3A37}
.card--panel .card__text{color:#C3D2E0}
.card__meta{
  margin-top:14px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--graphite);
}
.card--panel .card__meta{color:var(--mint)}

.panel{
  background:var(--ink-blue);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(20px,3vw,30px);
  color:#DCE6F0;
}
.panel__title{
  margin-bottom:12px;
  font-size:20px;font-weight:700;letter-spacing:.03em;color:var(--paper);
}
.panel a{color:var(--mint);border-bottom:1px solid rgba(79,209,165,.5)}
.panel a:hover{color:var(--orange);border-bottom-color:var(--orange)}

/* ---------- 11. 标签 ---------- */
.tag{
  display:inline-block;
  padding:3px 8px;
  border:1px solid currentColor;
  border-radius:var(--radius);
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--graphite);
}
.tag--orange{background:var(--orange);border-color:var(--orange);color:#FFF6EF}
.tag--mint{background:var(--mint);border-color:var(--mint);color:var(--sea)}
.tag--amber{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.tag--red{background:var(--red);border-color:var(--red);color:var(--paper)}

/* ---------- 12. 指标 ---------- */
.metric{display:flex;flex-direction:column;gap:6px}
.metric__value{
  font-family:var(--mono);
  font-size:clamp(34px,5vw,56px);
  font-weight:500;line-height:1;letter-spacing:-.02em;
  color:var(--sea);
  font-variant-numeric:tabular-nums;
}
.metric--hero .metric__value{font-size:clamp(56px,8.5vw,96px)}
.metric__value--orange{color:var(--orange)}
.metric__label{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--graphite);
}
.metric__note{font-size:14px;line-height:1.7;color:var(--graphite)}

/* ---------- 13. 表格 ---------- */
.table-wrap{
  overflow-x:auto;
  background:var(--paper);
  border:1px solid rgba(40,70,107,.3);
  border-radius:var(--radius);
  -webkit-overflow-scrolling:touch;
}
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th{
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.1em;text-transform:uppercase;color:var(--graphite);
  text-align:left;white-space:nowrap;
  padding:12px 14px;
  border-bottom:1px solid rgba(40,70,107,.35);
  background:rgba(244,239,230,.7);
}
.table td{
  padding:12px 14px;
  border-bottom:1px solid rgba(40,70,107,.16);
  vertical-align:top;
}
.table tbody tr:last-child td{border-bottom:0}
.table tbody tr:hover{background:rgba(255,106,26,.05)}

/* ---------- 14. 折叠面板 ---------- */
.accordion{border-top:1px solid rgba(40,70,107,.3)}
.accordion__item{border-bottom:1px solid rgba(40,70,107,.3)}
.accordion__trigger{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;
  font-size:17px;font-weight:700;letter-spacing:.02em;
  color:var(--ink);
  text-align:left;
  cursor:pointer;
}
.accordion__trigger::after{
  content:"+";
  font-family:var(--mono);font-size:18px;color:var(--orange);flex:none;
}
.accordion__trigger[aria-expanded="true"]::after{content:"–"}
.accordion__trigger:hover{color:var(--orange-deep)}
.accordion__panel{padding:0 4px 20px;font-size:16px;line-height:1.85;color:#3D3A37;max-width:38em}
.accordion__panel[hidden]{display:none}

/* ---------- 15. 面包屑 ---------- */
.breadcrumb{margin:0 0 26px}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--graphite);
}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__link{color:var(--graphite);border-bottom:1px solid transparent}
.breadcrumb__link:hover{color:var(--orange-deep);border-bottom-color:var(--orange)}
.breadcrumb__item[aria-current="page"]{color:var(--ink)}

/* ---------- 16. 图片容器 ---------- */
.img-frame{
  position:relative;
  overflow:hidden;
  background:var(--ink-blue);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.img-frame__media{
  display:block;width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  background:var(--ink-blue);
}
.img-frame--portrait .img-frame__media{aspect-ratio:3/4}
.img-frame--square .img-frame__media{aspect-ratio:1/1}
.img-frame--tilt{transform:rotate(-1.2deg)}
.img-frame__caption{
  display:block;
  padding:10px 12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--steel);
  background:var(--sea);
  border-top:1px solid var(--line);
}

/* ---------- 17. 滚动反馈组件 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;
  background:rgba(40,70,107,.4);
  z-index:300;pointer-events:none;
}
.scroll-progress__fill{
  display:block;height:100%;width:100%;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:0 50%;
}
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:260;
  width:48px;height:48px;
  display:grid;place-items:center;
  background:var(--sea);
  border:1px solid var(--orange);
  border-radius:var(--radius);
  color:var(--cream);
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  cursor:pointer;
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--orange)}

/* ---------- 18. 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 19. 页内章节高亮 ---------- */
[data-spy-nav] a{transition:color .2s ease,border-color .2s ease}
[data-spy-nav] a[aria-current="true"],
[data-spy-nav] a[aria-current="page"]{
  color:var(--orange-deep);
  border-color:var(--orange);
}

/* ---------- 20. 响应式 ---------- */
@media (min-width:600px){
  :root{--gut:32px}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:768px){
  .frame-bar{padding:0 28px}
  .frame-bar__note{display:block}
  .frame-bar__live{display:inline-flex}
}
@media (min-width:1000px){
  :root{
    --rail-w:248px;
    --bar-h:46px;
    --gut:48px;
  }
  .frame-bar__brand{display:none}
  .frame-bar__meta{display:block}
  .nav-toggle{display:none}

  .frame-rail{
    top:var(--bar-h);
    width:var(--rail-w);
    padding:26px 22px 28px;
    gap:22px;
    transform:none;
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transition:none;
  }
  .rail-quick{margin-top:auto}
  .footer__inner{grid-template-columns:minmax(260px,1.1fr) 2fr}
  .footer__cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:1280px){
  :root{--rail-w:272px}
}
@media (max-width:1023px){
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 6}
}
@media (max-width:640px){
  .grid{gap:18px}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 12}
  .card--tilt,.img-frame--tilt{transform:none}
  .to-top{right:14px;bottom:14px}
}

/* ---------- 21. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  html{scroll-behavior:auto}
  .js [data-reveal]{opacity:1;transform:none}
  .frame-bar__dot{animation:none}
  .card:hover,.btn:hover{transform:none}
}