*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;background:#fff}
body{margin:0;background:#fff;color:#000;font-family:'Source Sans 3',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;font-size:17px;line-height:1.65;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3{font-family:'Bebas Neue','Source Sans 3',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-weight:700;line-height:1.12;margin:0 0 .35em;letter-spacing:.01em}
hr{border:0;border-top:3px solid #000;margin:.55em 0 1em}
p{margin:0 0 1em}
.srOnly{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 顶栏 */
.topbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:10px 16px;background:#000;color:#fff;border-bottom:3px solid #000}
.brandmark{flex:0 0 auto;width:48px;height:48px;display:inline-flex;align-items:center;justify-content:center;background:#3bb1ff;border:3px solid #fff;color:#000;text-decoration:none;font-family:'Bebas Neue',sans-serif;font-size:24px;overflow:hidden}
.brandlogo{width:100%;height:100%;object-fit:cover}
.brandfallback{font-family:'Bebas Neue',sans-serif;font-size:26px;line-height:1}
.menu{position:relative}
.menu>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;min-height:46px;padding:8px 18px;background:#ff5252;color:#000;border:3px solid #fff;font-weight:700;font-size:16px;letter-spacing:.08em}
.menu>summary::-webkit-details-marker{display:none}
.menu .mClose{display:none}
.menu[open] .mOpen{display:none}
.menu[open] .mClose{display:inline}
.menu[open]>summary{position:fixed;top:12px;right:12px;z-index:90;background:#000;color:#fff;border-color:#000}
.menu>menu{position:fixed;inset:0;z-index:80;margin:0;padding:88px 20px 28px;background:#3bb1ff;list-style:none;display:none;flex-direction:column;gap:10px;overflow:auto;border:0}
.menu[open]>menu{display:flex}
.menu>menu li a{display:flex;align-items:center;gap:14px;min-height:58px;padding:10px 16px;background:#fff;border:3px solid #000;box-shadow:6px 6px 0 #000;text-decoration:none;color:#000;font-family:'Bebas Neue','Source Sans 3',sans-serif;font-size:22px;letter-spacing:.03em}
.menu>menu li a:hover{background:#ff5252}
.mnum{font-family:'Bebas Neue',sans-serif;font-size:19px;color:#ff5252;min-width:22px}
.menu>menu li a:hover .mnum{color:#000}
.menuFoot{margin-top:auto;display:flex;justify-content:space-between;font-size:15px;font-weight:700;padding:10px 4px 0;border-top:3px solid #000}
.search{display:flex;gap:6px;margin-left:auto;flex:1 1 200px;max-width:300px}
.search input{flex:1 1 auto;min-width:0;min-height:46px;padding:8px 12px;border:3px solid #fff;background:#fff;color:#000;font:inherit;font-size:16px}
.search input:focus-visible{outline:3px solid #ff5252;outline-offset:2px}
.search button{min-height:46px;padding:8px 14px;border:3px solid #fff;background:#3bb1ff;color:#000;font:inherit;font-weight:700;font-size:15px;cursor:pointer}
.search button:hover{background:#ff5252}

/* 锚点条 */
.anchorstrip{position:sticky;top:0;z-index:60;display:flex;overflow-x:auto;background:#3bb1ff;border-bottom:3px solid #000;scrollbar-width:thin}
.anchorstrip a{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;min-height:46px;padding:10px 15px;border-right:2px solid #000;text-decoration:none;font-weight:700;font-size:15px;white-space:nowrap;color:#000}
.anchorstrip a:hover,.anchorstrip a:focus-visible{background:#000;color:#3bb1ff}
.snum{font-family:'Bebas Neue',sans-serif;font-size:14px;color:#ff5252}

/* 主容器 */
main{display:grid;grid-template-columns:236px minmax(0,1fr);gap:0 34px;max-width:1180px;margin:0 auto;padding:0 16px}

/* Hero */
.hero{grid-column:1 / -1;margin:0 -16px;padding:44px 20px 40px;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;gap:22px;text-align:center;background:#fff;border-bottom:3px solid #000;overflow:hidden}
.heroText{max-width:760px;margin:0 auto}
.eyebrow{display:inline-block;margin:0 0 16px;padding:6px 14px;background:#ff5252;border:3px solid #000;font-size:15px;font-weight:700;letter-spacing:.1em}
.hero h1{font-size:clamp(36px,9vw,82px);margin:0 0 14px;text-shadow:5px 5px 0 #3bb1ff}
.lede{max-width:34em;margin:0 auto 22px;font-size:18px}
.heroBtns{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-bottom:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;background:#3bb1ff;color:#000;border:3px solid #000;box-shadow:5px 5px 0 #000;text-decoration:none;font-weight:700;font-size:16px;transition:transform .12s ease,box-shadow .12s ease}
.btn:hover,.btn:focus-visible{transform:translate(3px,3px);box-shadow:2px 2px 0 #000}
.btnRed{background:#ff5252}
.btnBig{min-height:54px;padding:14px 30px;font-size:18px;background:#fff}
.badges{list-style:none;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:0;padding:0}
.badges li{padding:6px 12px;background:#fff;border:3px solid #000;font-size:14px;font-weight:700;transform:rotate(-2deg)}
.badges li:nth-child(2){transform:rotate(2deg);background:#3bb1ff}
.badges li:nth-child(3){transform:rotate(-1deg);background:#ff5252}
.heroMedia{margin:0 auto;width:100%;max-width:740px;border:3px solid #000;box-shadow:8px 8px 0 #ff5252;background:#fff}
.heroImg{width:100%;aspect-ratio:16/9;object-fit:cover}

/* 侧栏 */
.side{grid-column:1;align-self:start;padding:36px 0 40px;display:grid;gap:22px}
.sideCard{background:#fff;border:3px solid #000;box-shadow:6px 6px 0 #3bb1ff;padding:16px}
.sideCardRed{box-shadow:6px 6px 0 #ff5252}
.side h2{font-size:21px;margin:0 0 8px}
.side hr{margin:0 0 12px}
.sideCard p{font-size:15px;margin:0}
.sideList{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.sideList a{display:flex;align-items:center;gap:10px;min-height:42px;padding:6px 10px;border:2px solid #000;text-decoration:none;font-size:15px;font-weight:600}
.sideList a:hover{background:#3bb1ff}
.sideList .num{font-family:'Bebas Neue',sans-serif;font-size:15px;color:#ff5252}

/* 正文 */
.prose{grid-column:2;padding:36px 0 60px;min-width:0}
.prose>article{padding:0 0 34px;margin-bottom:34px;border-bottom:3px solid #000;scroll-margin-top:64px}
.prose>article:last-child{border-bottom:0;margin-bottom:0}
.prose h2{font-size:clamp(25px,3.6vw,38px);margin:0 0 .3em}
.prose h3{font-size:clamp(20px,2.4vw,26px);margin:1.4em 0 .3em}
.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1em}
.prose li{margin-bottom:.4em}
.prose a{color:#000;text-decoration:underline;text-decoration-color:#ff5252;text-decoration-thickness:3px;text-underline-offset:3px;font-weight:600}
.prose a:hover{background:#3bb1ff}
.prose strong{font-weight:700;background:#3bb1ff;padding:0 3px}
.prose blockquote{margin:0 0 1.2em;padding:10px 16px;border-left:6px solid #ff5252;background:#f4f1ea}
.prose blockquote p:last-child{margin-bottom:0}
.prose code{font-family:ui-monospace,monospace;font-size:15px;background:#f4f1ea;border:2px solid #000;padding:1px 5px}
.prose img{border:3px solid #000;box-shadow:6px 6px 0 #3bb1ff;margin:0 0 1.2em}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.2em;font-size:16px}
.prose th,.prose td{border:2px solid #000;padding:8px 10px;text-align:left}
.prose th{background:#3bb1ff}

/* 页脚 */
.foot{background:#000;color:#fff;border-top:3px solid #000}
.footCta{background:#ff5252;color:#000;padding:44px 20px;text-align:center;border-bottom:3px solid #000}
.footCta h2{font-size:clamp(26px,5vw,46px);margin:0 0 6px}
.footCta hr{border-top-color:#000;max-width:200px;margin:12px auto 24px}
.footCols{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;max-width:1180px;margin:0 auto;padding:42px 20px 10px}
.footCols h3{font-size:19px;color:#3bb1ff;margin:0 0 6px}
.footCols hr{border-top:2px solid #3bb1ff;margin:0 0 14px}
.footCols p{font-size:15px;color:#e8e8e8}
.footMark{font-family:'Bebas Neue','Source Sans 3',sans-serif;font-size:24px;color:#fff;margin:0 0 8px;letter-spacing:.04em}
.footCols ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.footCols ul a{display:inline-flex;align-items:center;min-height:40px;text-decoration:none;color:#fff;font-size:15px;border-bottom:2px solid transparent}
.footCols ul a:hover,.footCols ul a:focus-visible{color:#3bb1ff;border-bottom-color:#3bb1ff}
.foot address{font-style:normal;font-size:15px;line-height:1.8;color:#e8e8e8}
.footBase{max-width:1180px;margin:22px auto 0;padding:18px 20px 26px;border-top:2px solid #fff;text-align:center;font-size:14px;color:#cfcfcf}
.footBase p{margin:0}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:900px){
  main{grid-template-columns:minmax(0,1fr);gap:0}
  .prose{grid-column:1;order:1;padding-top:26px}
  .side{grid-column:1;order:2;padding:0 0 40px;grid-template-columns:1fr 1fr}
  .footCols{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  body{font-size:16px}
  .search{flex:1 1 100%;max-width:none;order:3}
  .hero{padding:34px 16px 30px}
  .hero h1{font-size:clamp(32px,11vw,54px);text-shadow:4px 4px 0 #3bb1ff}
  .lede{font-size:17px}
  .badges li{font-size:13px;padding:5px 10px}
  .side{grid-template-columns:1fr}
  .prose{padding-bottom:42px}
  .footCols{grid-template-columns:1fr;gap:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .btn{transition:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}