:root{color-scheme:dark;--bg:#101714;--panel:#17211b;--text:#edf1e9;--muted:#a7b4a9;--accent:#bae49f;--line:#2c3930;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);line-height:1.8}a{color:inherit;text-decoration:none}a:focus-visible{outline:2px solid var(--accent);outline-offset:7px;border-radius:3px}a:hover{color:var(--accent)}.skip{position:absolute;left:20px;top:-100px;background:var(--accent);color:var(--bg);padding:8px 18px;z-index:3}.skip:focus{top:10px}.site-shell{width:min(1120px,calc(100% - 64px));margin:0 auto}.site-header{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;letter-spacing:1px}.brand-mark{display:grid;place-items:center;width:38px;height:38px;color:var(--bg);background:var(--accent);border-radius:12px;font-size:22px}nav{display:flex;gap:34px;font-size:14px;color:var(--muted)}.hero{padding:88px 0 92px;position:relative;border-bottom:1px solid var(--line)}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--accent);margin:0 0 22px}.eyebrow>span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:middle}h1{font-size:clamp(44px,6.4vw,78px);line-height:1.3;letter-spacing:-2px;margin:0;font-weight:600}h1 span{color:var(--accent)}.intro{max-width:505px;font-size:17px;line-height:1.95;margin:26px 0;color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:40px;border-bottom:1px solid #7f9b6e;padding:6px 0;color:var(--accent);font-size:14px}.hero-index{position:absolute;right:0;top:155px;width:200px;display:grid;color:#65796a;letter-spacing:3px;font-size:14px;gap:8px}.hero-index i{height:70px;border-left:1px solid #52694a;margin:18px 0}.hero-index span:last-child{font-size:11px;color:var(--muted)}.topics{padding:45px 0 60px}.section-heading{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:24px;gap:12px}.section-heading h2{font-size:20px;margin:0;font-weight:500}.section-heading>span{color:var(--muted);font-size:12px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-card{border:1px solid var(--line);padding:28px;border-radius:14px;background:var(--panel)}.card-number{font-size:10px;letter-spacing:2px;color:var(--accent)}.topic-card h3{font-size:21px;font-weight:500;margin:32px 0 12px}.topic-card p{font-size:14px;color:var(--muted);margin:0}.about{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;padding:48px 0 64px;border-top:1px solid var(--line)}.about h2{font-size:28px;line-height:1.5;font-weight:500;margin:0}.about .eyebrow{font-size:10px;margin-bottom:18px}.about-copy p{margin:0 0 15px;font-size:14px;color:var(--muted)}.about-copy .privacy-note{font-size:12px;color:#93a395;margin-top:24px}footer{padding:25px 0 32px;display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer a{text-decoration:underline;text-underline-offset:4px}
@media(max-width:700px){.site-shell{width:calc(100% - 36px)}.site-header{height:80px}.brand{font-size:17px;gap:8px}.brand-mark{height:32px;width:32px;font-size:19px}nav{gap:18px;font-size:12px}.hero{padding:55px 0}.hero-index{display:none}h1{letter-spacing:-1px}.intro{font-size:15px}.eyebrow{font-size:10px;letter-spacing:1.5px}.topics{padding:30px 0 36px}.section-heading{align-items:center}.section-heading>span{font-size:10px}.topic-grid{grid-template-columns:1fr;gap:12px}.topic-card{padding:23px}.topic-card h3{margin:12px 0 8px;font-size:20px}.about{grid-template-columns:1fr;gap:24px;padding:36px 0}.about h2{font-size:25px}.about h2 br{display:none}footer{flex-direction:column;gap:9px;padding:23px 0;font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}