/* ===========================================================
   乐投主页 · 共享样式表 /assets/site.css
   视觉基调：粗野主义细节 × 数据叙事，2px 墨线 + 8px 硬阴影
   色彩节奏：雾白内容区 / 深墨分区 / 纸白卡片 / 红蓝金三锚点
   =========================================================== */

/* ---------- 01. 设计令牌 ---------- */
:root{
  --ink:#0B0E17;
  --navy:#141C2E;
  --slate:#5A6478;
  --mist:#F2F3F7;
  --paper:#FFFFFF;
  --red:#E01F3D;
  --red-700:#A3122C;
  --gold:#D8A24A;
  --gold-100:#F6E7C9;
  --blue:#1E4E8C;
  --blue-100:#DCE6F5;
  --green:#1F7A5A;

  --on-ink-1:#F2F3F7;
  --on-ink-2:rgba(242,243,247,.76);
  --on-ink-3:rgba(242,243,247,.58);

  --sans:"Inter","PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1200px;
  --gut:clamp(18px,4vw,32px);
  --pad-section:clamp(48px,7vw,88px);

  --line:2px solid var(--ink);
  --hard:8px 8px 0 var(--ink);
  --hard-sm:4px 4px 0 var(--ink);
  --hard-xs:3px 3px 0 var(--ink);
}

/* ---------- 02. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  color:var(--ink);
  background:var(--mist);
  overflow-x:clip;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0;}
ul,ol{padding:0;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;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:3px solid var(--red);outline-offset:2px;}

/* ---------- 03. 中文排版基底 ---------- */
h1,h2,h3,h4{font-weight:700;line-height:1.25;letter-spacing:-.01em;}
.display-title{
  font-size:clamp(2.6rem,6.6vw,5.5rem);
  font-weight:200;
  letter-spacing:-.02em;
  line-height:1.06;
}
.section-title{font-size:clamp(1.75rem,3.4vw,2.5rem);font-weight:700;line-height:1.18;}
.sub-title{font-size:clamp(1.15rem,2vw,1.5rem);font-weight:600;}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--slate);
}
.eyebrow::before{content:"";flex:none;width:28px;height:2px;background:var(--gold);}
.lede{font-size:clamp(1.02rem,1.5vw,1.18rem);line-height:1.8;color:var(--slate);max-width:44em;}
.mono{font-family:var(--mono);font-size:.86em;letter-spacing:.06em;}
.index-num{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--gold);}

/* ---------- 04. 版心与网格 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.grid{display:grid;gap:clamp(18px,2.4vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}
.grid--stagger{align-items:start;}
.grid--stagger > *:nth-child(even){margin-top:clamp(16px,3vw,44px);}

/* ---------- 05. 区块节奏 ---------- */
.page-main{display:block;}
.section{padding-block:var(--pad-section);}
.section--paper{background:var(--paper);}
.section--mist{background:var(--mist);}
.section--ink{background:var(--ink);color:var(--on-ink-1);}
.section--navy{background:var(--navy);color:var(--on-ink-1);}
.section--ink .lede,.section--navy .lede{color:var(--on-ink-2);}
.section--ink .eyebrow,.section--navy .eyebrow{color:var(--gold);}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 32px;margin-bottom:clamp(24px,4vw,40px);
}

/* ---------- 06. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  padding:12px 20px;background:var(--ink);color:var(--paper);
  font-weight:700;font-size:14px;border:2px solid var(--gold);
}
.skip-link:focus{left:12px;top:12px;}

/* ---------- 07. 头部 · 双层信息导航 ---------- */
.site-header{position:relative;z-index:80;}

.header-top{
  background:var(--ink);
  color:var(--on-ink-1);
  border-bottom:2px solid var(--gold);
}
.header-top__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:68px;padding-block:12px;
}
.header-status{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  color:var(--gold-100);
}
.header-status__dot{
  flex:none;width:10px;height:10px;border-radius:50%;
  background:var(--gold);
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(216,162,74,.5);}
  70%{box-shadow:0 0 0 11px rgba(216,162,74,0);}
  100%{box-shadow:0 0 0 0 rgba(216,162,74,0);}
}

.header-bar{
  position:sticky;top:0;z-index:70;
  background:var(--paper);
  border-bottom:2px solid var(--ink);
  transition:box-shadow .2s ease-out;
}
.header-bar[data-compact]{box-shadow:0 8px 0 rgba(11,14,23,.1);}
.header-bar__inner{
  display:flex;align-items:center;gap:16px;
  min-height:66px;transition:min-height .2s ease-out;
}
.header-bar[data-compact] .header-bar__inner{min-height:56px;}

/* 08. 品牌署名 */
.brand{display:inline-flex;align-items:center;gap:12px;color:inherit;}
.brand__mark{
  flex:none;width:40px;height:40px;display:grid;place-items:center;
  background:var(--red);color:#fff;
  font-weight:800;font-size:20px;line-height:1;
  border:2px solid var(--paper);
  box-shadow:3px 3px 0 var(--gold);
}
.brand__text{display:flex;flex-direction:column;line-height:1.25;}
.brand__name{font-size:16px;font-weight:800;letter-spacing:.02em;}
.brand__sub{font-size:12px;letter-spacing:.06em;color:var(--slate);}
.header-top .brand__sub,.site-footer .brand__sub{color:var(--on-ink-2);}

/* 09. 主导航 */
.site-nav{flex:1 1 auto;min-width:0;}
.site-nav__list{display:flex;align-items:stretch;gap:2px;}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:7px;
  padding:12px 14px;
  font-size:15px;font-weight:600;
  color:var(--ink);
  border-bottom:3px solid transparent;
  transition:color .15s ease-out,background-color .15s ease-out,border-color .15s ease-out;
}
.site-nav__link:hover{background:var(--mist);color:var(--red-700);}
.site-nav__link[aria-current="page"]{
  color:var(--red);
  background:var(--mist);
  border-bottom-color:var(--red);
}
.site-nav__index{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--slate);}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--red);}
.header-cta{flex:none;margin-left:auto;}

/* 10. 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  border:2px solid var(--ink);
  background:var(--paper);
  font-size:14px;font-weight:700;
  box-shadow:var(--hard-xs);
  cursor:pointer;
}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px;}
.nav-toggle__bars span{display:block;height:2px;background:var(--ink);transition:transform .18s ease-out,opacity .18s ease-out;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* 11. 阅读进度 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:transparent;pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;background:var(--red);
  transition:width .1s linear;
}

/* ---------- 12. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;
  font-size:15px;font-weight:700;letter-spacing:.02em;
  border:2px solid var(--ink);
  background:var(--paper);color:var(--ink);
  box-shadow:var(--hard-sm);
  cursor:pointer;
  transition:transform .15s ease-out,box-shadow .15s ease-out,background-color .15s ease-out,color .15s ease-out;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink);}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink);}
.btn--primary{background:var(--red);color:#fff;}
.btn--primary:hover{background:var(--red-700);}
.btn--outline{background:transparent;color:var(--paper);border-color:var(--paper);box-shadow:4px 4px 0 var(--gold);}
.btn--outline:hover{box-shadow:6px 6px 0 var(--gold);}
.btn--ghost{background:transparent;color:var(--red);border-color:var(--red);box-shadow:4px 4px 0 var(--red);}
.btn--ghost:hover{box-shadow:6px 6px 0 var(--red);}
.btn--sm{padding:9px 16px;font-size:14px;box-shadow:var(--hard-xs);}
.btn--sm:hover{box-shadow:5px 5px 0 var(--ink);}

/* ---------- 13. 面包屑 ---------- */
.breadcrumbs{background:var(--paper);border-bottom:2px solid var(--ink);padding-block:16px;}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--slate);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:var(--gold);}
.breadcrumbs__link{color:var(--slate);border-bottom:1px solid transparent;padding-bottom:1px;}
.breadcrumbs__link:hover{color:var(--red);border-bottom-color:var(--red);}
.breadcrumbs__item[aria-current="page"]{color:var(--ink);font-weight:600;}

/* ---------- 14. 卡片 / 面板 ---------- */
.card{
  display:flex;flex-direction:column;gap:12px;
  padding:clamp(18px,2.2vw,26px);
  background:var(--paper);
  border:2px solid var(--ink);
  box-shadow:var(--hard);
}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;}
.card__title{font-size:clamp(1.05rem,1.6vw,1.3rem);font-weight:700;line-height:1.35;}
.card__text{font-size:15.5px;line-height:1.75;color:var(--slate);}
.card__meta{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--slate);}
.card--accent{border-color:var(--red);box-shadow:8px 8px 0 var(--red);}

.panel{
  padding:clamp(20px,3vw,36px);
  background:var(--paper);
  border:2px solid var(--ink);
  box-shadow:var(--hard);
}
.panel--navy{background:var(--navy);color:var(--on-ink-1);}
.panel--navy .card__text,.panel--navy .lede{color:var(--on-ink-2);}
.panel--gold{background:var(--gold-100);}
.panel--flush{padding:0;}

/* ---------- 15. 图形与图注容器 ---------- */
.media{
  margin:0;
  border:2px solid var(--ink);
  background:var(--paper);
  box-shadow:var(--hard);
  overflow:hidden;
}
.media__inner{
  position:relative;width:100%;aspect-ratio:16 / 9;overflow:hidden;
  display:grid;place-items:center;
  background:
    linear-gradient(135deg,transparent 0 46%,var(--gold-100) 46% 54%,transparent 54% 100%),
    repeating-linear-gradient(135deg,var(--blue-100) 0 14px,var(--mist) 14px 28px);
}
.media__inner > img{width:100%;height:100%;object-fit:cover;}
.media--wide .media__inner{aspect-ratio:21 / 9;}
.media--tall .media__inner{aspect-ratio:3 / 4;}
.media--square .media__inner{aspect-ratio:1 / 1;}
.media__caption{
  padding:10px 14px;
  font-size:13px;line-height:1.6;color:var(--slate);
  border-top:2px solid var(--ink);background:var(--paper);
}

/* ---------- 16. 标签与状态点 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;white-space:nowrap;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  border:2px solid var(--ink);background:var(--paper);color:var(--ink);
}
.tag--red{background:var(--red);color:#fff;}
.tag--gold{background:var(--gold-100);border-color:var(--gold);}
.tag--blue{background:var(--blue-100);border-color:var(--blue);color:var(--navy);}
.tag--green{background:var(--paper);border-color:var(--green);color:var(--green);}

.status-dot{display:inline-block;flex:none;width:9px;height:9px;border-radius:50%;background:var(--green);}
.status-dot--gold{background:var(--gold);}
.status-dot--red{background:var(--red);}
.status-dot--idle{background:var(--slate);}

/* ---------- 17. 分段切换与筛选 ---------- */
.segmented{
  display:inline-flex;flex-wrap:wrap;
  border:2px solid var(--ink);background:var(--paper);
  box-shadow:var(--hard-sm);
}
.segmented__btn{
  padding:10px 18px;
  font-size:14px;font-weight:700;
  border-right:2px solid var(--ink);
  cursor:pointer;
  transition:background-color .15s ease-out,color .15s ease-out;
}
.segmented__btn:last-child{border-right:0;}
.segmented__btn:hover{background:var(--mist);}
.segmented__btn[aria-selected="true"]{background:var(--red);color:#fff;}
.tabs-panel{margin-top:clamp(20px,3vw,32px);}
.tabs-panel[hidden]{display:none;}

.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;
  font-size:14px;font-weight:600;
  border:2px solid var(--ink);background:var(--paper);
  cursor:pointer;
  transition:background-color .15s ease-out,color .15s ease-out,transform .15s ease-out;
}
.chip:hover{transform:translateY(-2px);}
.chip[aria-pressed="true"],.chip[data-active]{background:var(--ink);color:var(--paper);}

/* ---------- 18. 正文容器 ---------- */
.prose{max-width:42em;}
.prose > * + *{margin-top:1.1em;}
.prose h2{margin-top:1.9em;font-size:clamp(1.35rem,2.2vw,1.75rem);}
.prose h3{margin-top:1.5em;font-size:1.15rem;font-weight:600;}
.prose p{max-width:38em;}
.prose ul,.prose ol{display:flex;flex-direction:column;gap:.5em;}
.prose ul li{position:relative;padding-left:20px;}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;background:var(--gold);}
.prose ol{list-style:decimal;padding-left:1.3em;}
.prose a{border-bottom:2px solid var(--gold);}
.prose a:hover{color:var(--red);border-bottom-color:var(--red);}

/* ---------- 19. 工具类 ---------- */
.rule{border:0;border-top:2px solid var(--ink);}
.rule--dashed{border-top-style:dashed;border-top-color:var(--slate);}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

@media (prefers-reduced-motion: no-preference){
  html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .38s ease-out,transform .38s ease-out;}
  html.js [data-reveal].is-visible{opacity:1;transform:none;}
}

/* ---------- 20. 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:90;
  width:48px;height:48px;display:grid;place-items:center;
  font-size:18px;font-weight:700;
  border:2px solid var(--ink);background:var(--paper);color:var(--ink);
  box-shadow:var(--hard-sm);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out,background-color .15s ease-out;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--red);color:#fff;}

/* ---------- 21. 页脚 ---------- */
.site-footer{
  background:var(--ink);color:var(--on-ink-1);
  border-top:2px solid var(--gold);
}
.footer-top{
  display:grid;
  grid-template-columns:1.4fr repeat(3,minmax(0,1fr));
  gap:32px 28px;
  padding-block:clamp(40px,6vw,60px) clamp(32px,4vw,44px);
}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.brand--footer .brand__mark{border-color:var(--gold);box-shadow:3px 3px 0 var(--red);}
.brand--footer .brand__name{color:var(--paper);}
.footer-brand__note{
  font-size:14px;letter-spacing:.04em;color:var(--on-ink-2);
  padding-left:12px;border-left:3px solid var(--gold);
}
.footer-col{display:block;}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--mono);font-size:12px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--gold);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px;}
.footer-col__link{
  display:inline-block;
  font-size:15px;color:var(--on-ink-2);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color .15s ease-out,border-color .15s ease-out;
}
.footer-col__link:hover{color:var(--paper);border-bottom-color:var(--red);}

.footer-contact{
  display:grid;
  grid-template-columns:minmax(160px,220px) minmax(0,1fr);
  gap:18px 32px;
  padding-block:clamp(24px,3vw,34px);
  border-top:2px solid rgba(242,243,247,.2);
  border-bottom:2px solid rgba(242,243,247,.2);
}
.footer-contact__title{font-size:15px;font-weight:700;letter-spacing:.04em;color:var(--paper);}
.footer-contact__list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:16px 24px;margin:0;
}
.footer-contact__item{min-width:0;}
.footer-contact__term{
  margin-bottom:4px;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--gold);
}
.footer-contact__desc{margin-left:0;font-size:15px;color:var(--on-ink-1);word-break:break-word;}
.footer-contact__note{grid-column:2;font-size:13.5px;line-height:1.7;color:var(--on-ink-3);}

.footer-legal{background:var(--navy);border-top:2px solid rgba(242,243,247,.14);}
.footer-legal__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;padding-block:18px;
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:8px 20px;}
.footer-legal__link{
  font-size:13px;color:var(--on-ink-2);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .15s ease-out,border-color .15s ease-out;
}
.footer-legal__link:hover{color:var(--paper);border-bottom-color:var(--gold);}
.footer-legal__line{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--on-ink-3);}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex;flex:none;}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    background:var(--paper);
    border-bottom:2px solid var(--ink);
    box-shadow:0 10px 0 rgba(11,14,23,.12);
    max-height:72vh;overflow-y:auto;
  }
  .site-nav[data-open]{display:block;}
  .site-nav__list{flex-direction:column;gap:0;padding:8px var(--gut) 16px;}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:14px 4px;
    border-bottom:2px solid var(--mist);
    border-left:4px solid transparent;
  }
  .site-nav__link:hover{background:var(--mist);}
  .site-nav__link[aria-current="page"]{
    border-left-color:var(--red);
    border-bottom-color:var(--mist);
    padding-left:14px;
  }
  .header-cta{padding:9px 14px;}
}

@media (max-width:720px){
  body{font-size:16px;}
  .header-top__inner{flex-direction:column;align-items:flex-start;gap:10px;min-height:0;padding-block:14px;}
  .header-status{font-size:11px;letter-spacing:.05em;}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr);}
  .grid--stagger > *:nth-child(even){margin-top:0;}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-contact{grid-template-columns:minmax(0,1fr);}
  .footer-contact__note{grid-column:auto;}
  .footer-legal__inner{flex-direction:column;align-items:flex-start;}
  .to-top{right:14px;bottom:14px;width:44px;height:44px;}
}

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