/* 开云体育：轻量知识型阅读系统 */
:root{--navy:#102e46;--deep:#163c57;--teal:#13b8c5;--blue:#237bd3;--ink:#18364b;--body:#344c60;--muted:#64798a;--line:#dce6ed;--pale:#eaf1f6;--mint:#e9f8f8;--bg:#f4f7fa;--width:1200px;--gutter:28px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:26px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:#146aa7;text-underline-offset:3px}a:hover{color:#07517b}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--teal);outline-offset:3px}button{font:inherit;cursor:pointer}img{max-width:100%;height:auto}figure{margin:0}h1,h2,h3{line-height:1.4;color:var(--ink);margin:0 0 18px}h1{font-size:36px;letter-spacing:-.4px}h2{font-size:27px}h3{font-size:20px}p{margin:0 0 17px}ul,ol{padding-left:1.45em;margin:0 0 18px}li+li{margin-top:9px}section{scroll-margin-top:28px}.wrap{max-width:var(--width);margin-inline:auto;padding-inline:var(--gutter)}.section{margin-block:62px}.section-head{max-width:760px;margin-bottom:26px}.section-head 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@media(max-width:1200px){:root{--gutter:22px}.feature-split{gap:26px}.nav-links{gap:0}.nav-links a{font-size:14px;padding-inline:6px}}
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@media(max-width:360px){.brand-inner{gap:7px}.brand-mark{max-width:35vw}.entry-link{padding:6px 8px;font-size:12px}.hero h1{font-size:27px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}