:root{color-scheme:light;--ink:#20262f;--muted:#616b78;--blue:#245bd6;--line:#e5e9ef;--soft:#f5f7fa;--radius:14px}
*{box-sizing:border-box}html{scroll-padding-top:28px}body{margin:0;background:#fff;color:var(--ink);font-family:"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none}button,a,summary{-webkit-tap-highlight-color:transparent}a,summary{touch-action:manipulation}a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}::selection{background:#dce7ff;color:#163a8b}.wrap{width:min(1080px,calc(100% - 64px));margin-inline:auto}.header{min-height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.brand{font-size:19px;font-weight:700;white-space:nowrap}.brand span{color:var(--blue);margin:0 5px}nav{display:flex;gap:30px;font-size:14px;color:var(--muted)}nav a{padding-block:12px}nav a:hover,.text-link:hover{color:var(--blue);text-decoration:underline;text-underline-offset:6px}.intro{padding:44px 0 40px}h1,h2,h3,h4,p{margin:0}h1{font-size:clamp(38px,5vw,60px);line-height:1.3;letter-spacing:-.025em;font-weight:650;text-wrap:balance}.intro>p{margin-top:20px;font-size:18px;color:var(--muted);line-height:1.9}.text-link{display:inline-flex;align-items:center;gap:12px;color:var(--blue);margin-top:16px;font-weight:600;font-size:15px}svg{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.text-link svg,.button svg{width:20px;height:20px}h2{font-size:23px;font-weight:650}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:23px}.section-heading>span{font-size:14px;color:var(--muted)}.skill-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:1.1fr 1fr}.skill-copy{padding:28px 40px}.tool-icon{width:36px;height:36px;color:var(--blue);margin-bottom:4px}.skill-copy h3{font-size:28px;letter-spacing:-.02em}.skill-lead{font-size:21px;line-height:1.65;margin-top:12px}.description{color:var(--muted);font-size:15px;margin-top:18px;max-width:44ch}.tags{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--muted);margin:16px 0 0}.button{margin-top:20px;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 24px;border-radius:7px;background:var(--blue);color:#fff;font-weight:600;transition:background .16s ease-out}.button:hover{background:#1949b5}.file-note{font-size:13px;color:var(--muted);margin-top:12px}.skill-note{background:var(--soft);padding:40px}.skill-note h4{font-size:22px}.skill-note>p{font-size:14px;color:var(--muted);margin-top:12px}dl{margin:29px 0}dl>div+div{margin-top:21px}dt{font-size:15px;font-weight:600}dd{margin:4px 0 0;color:var(--muted);font-size:14px}details{border-top:1px solid #dce2eb;padding-top:19px}summary{cursor:pointer;font-size:14px;font-weight:600;min-height:28px}summary:hover{color:var(--blue)}.instructions{font-size:13px;color:var(--muted)}.instructions p{margin-top:12px}code{overflow-wrap:anywhere;font-size:12px}.video-section{padding-top:64px}.video-empty{display:flex;align-items:center;gap:22px;padding:29px 0 32px;border-bottom:1px solid var(--line);margin-top:9px}.video-empty>svg{width:48px;height:48px;color:#7a8799}.video-empty h3{font-size:17px;font-weight:600}.video-empty p{font-size:14px;color:var(--muted);margin-top:3px}.status{margin-left:auto;color:var(--muted);background:var(--soft);padding:5px 12px;border-radius:5px;font-size:13px;white-space:nowrap}.about-section{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;padding:61px 0 67px}.about-section p{font-size:15px;margin-top:17px}.about-section .muted{font-size:14px;color:var(--muted);margin-top:12px}.contact{padding-top:4px}.contact h3{font-size:17px}.contact p{color:var(--muted);font-size:14px}.footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;padding-block:25px;font-size:13px;color:var(--muted)}.skip-link{position:absolute;left:20px;top:-100px;padding:8px 16px;background:#fff;z-index:2}.skip-link:focus{top:12px}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{min-height:82px;gap:12px}.brand{font-size:16px}nav{gap:14px;font-size:13px}.intro{padding:28px 0}.intro>p{font-size:16px}.section-heading{align-items:flex-start;flex-direction:column;gap:3px}.skill-card{grid-template-columns:1fr}.skill-copy{padding:24px}.skill-note{padding:24px}.skill-note dl{margin:18px 0}.skill-note dl>div+div{margin-top:12px}.skill-note details{padding-top:14px}.skill-note>p{margin-top:8px}.video-section{padding-top:43px}.about-section{grid-template-columns:1fr;gap:30px;padding:44px 0}.video-empty{gap:14px}.status{display:none}.footer{font-size:13px;flex-wrap:wrap}h2{font-size:21px}}
@media(max-width:380px){.intro{padding:16px 0}.header{align-items:flex-start;flex-direction:column;gap:0;padding-block:15px}nav{gap:22px}.skill-copy,.skill-note{padding:23px}.desktop-break{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}