*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--font-serif: "Noto Serif", Georgia, "Times New Roman", serif;--font-serif-zh: "Noto Serif SC", "Noto Serif", "Songti SC", "STSong", serif;--bg: #f4f0e8;--bg-alt: #eae5da;--text: #2d2a26;--text-dim: #736e66;--ink: #1c1a16;--border: #d4cec2;--topbar-bg: rgba(244, 240, 232, .86);--control-bg: rgba(255, 255, 255, .24);--control-bg-hover: rgba(255, 255, 255, .42);--accent: #5f7468;--icon-shadow: 0 4px 20px rgba(0, 0, 0, .06);--spotlight-opacity: 0;--page-max: 1040px;--reading-max: 760px;--hero-copy-max: 560px;color-scheme:light}[data-theme=dark]{--bg: #0f1110;--bg-alt: #171a17;--text: #eee9dd;--text-dim: #aca497;--ink: #fbf6ea;--border: #343b35;--topbar-bg: rgba(15, 17, 16, .86);--control-bg: rgba(255, 255, 255, .045);--control-bg-hover: rgba(255, 255, 255, .09);--accent: #9bb39d;--icon-shadow: 0 18px 46px rgba(0, 0, 0, .46);--spotlight-opacity: 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span{font-size:15px;font-weight:600;font-family:inherit}.topbar-right{display:flex;align-items:center;gap:20px}.topbar-right a{font-size:13px;color:var(--text-dim);text-decoration:none;font-family:inherit;transition:color .2s}.topbar-right a:hover{color:var(--text)}.theme-toggle{background:var(--control-bg);border:1px solid var(--border);color:var(--text-dim);width:32px;height:32px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;transition:all .2s}.theme-toggle:hover{color:var(--text);background:var(--control-bg-hover);border-color:var(--accent)}.lang-toggle{font-size:13px;color:var(--text-dim);background:var(--control-bg);border:1px solid var(--border);width:32px;height:32px;padding:0;border-radius:8px;cursor:pointer;text-decoration:none;display:flex;align-items:center;justify-content:center;font-family:var(--font-serif-zh);font-weight:700;transition:all .2s}.lang-toggle:hover{color:var(--text);background:var(--control-bg-hover);border-color:var(--accent)}[data-theme=dark] .theme-icon-light,[data-theme=light] .theme-icon-dark{display:none}.hero{position:relative;isolation:isolate;overflow:hidden;min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:100px 24px 60px}.hero:before{content:"";position:absolute;top:8vh;left:50%;z-index:0;width:min(560px,88vw);height:min(720px,78vh);background:url(/spotlight.svg?v=3) center top / 100% 100% no-repeat;opacity:var(--spotlight-opacity);pointer-events:none;transform:translate(-50%)}.hero>*{position:relative;z-index:1}.hero-icon-wrap{position:relative;display:inline-flex;width:160px;height:160px;margin-bottom:48px;z-index:0}.hero-icon{width:160px;height:160px;border-radius:36px;background:var(--bg-alt);box-shadow:var(--icon-shadow);position:relative;z-index:1}[data-theme=dark] .hero-icon{background:#030403}.hero h1{font-size:clamp(2.4rem,6vw,3.6rem);font-weight:400;letter-spacing:0;line-height:1.2;margin-bottom:20px}.hero .tagline{font-size:clamp(1rem,2vw,1.15rem);color:var(--text-dim);max-width:var(--hero-copy-max);margin:0 auto 48px;line-height:1.8;font-style:italic}.hero-links{display:flex;gap:32px;align-items:center}.hero-links a{font-size:15px;color:var(--text);text-decoration:none;padding-bottom:2px;border-bottom:1px solid var(--border);transition:border-color .2s;font-family:inherit}.hero-links a:hover{border-color:var(--text)}.hero-links .sep{color:var(--border);font-size:18px;user-select:none}.scroll-hint{display:none}.epigraph{max-width:var(--reading-max);margin:0 auto;padding:60px 24px;text-align:center;font-style:italic;font-size:15px;line-height:2;color:var(--text-dim);letter-spacing:0}[lang=zh-Hans] .epigraph{font-style:normal;letter-spacing:0;font-size:16px}.divider{display:none}.content{max-width:var(--reading-max);margin:0 auto;padding:80px 24px}.content h2{font-size:clamp(1.5rem,3vw,1.9rem);font-weight:400;margin-bottom:40px;line-height:1.4}.feature-list{list-style:none}.feature-list li{padding:28px 0;border-bottom:1px solid var(--border)}.feature-list li:first-child{border-top:1px solid var(--border)}.feature-name{font-size:17px;font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:12px;font-family:inherit}.feature-name .mark{font-size:20px;opacity:.4;font-family:inherit}.feature-desc{font-size:15px;color:var(--text-dim);line-height:1.8;padding-left:32px}.details-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px 40px}.details-group h3{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:0;color:var(--text-dim);margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border);font-family:inherit}.details-group ul{list-style:none}.details-group li{font-size:14px;color:var(--text-dim);padding:5px 0;line-height:1.7;font-family:inherit}.tech-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none}.tech-list li{padding:4px 12px;border:1px solid var(--border);border-radius:4px;font-size:13px;color:var(--text-dim);font-family:inherit}.cta{text-align:center;padding:80px 24px 100px;max-width:var(--reading-max);margin:0 auto}.cta h2{font-size:clamp(1.4rem,3vw,1.8rem);font-weight:400;margin-bottom:12px}.cta p{color:var(--text-dim);font-size:15px;margin-bottom:36px}.cta-links{display:flex;gap:24px;justify-content:center;align-items:center}.cta-links a{font-size:15px;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border);padding-bottom:2px;transition:border-color .2s;font-family:inherit}.cta-links a:hover{border-color:var(--text)}.cta-links .sep{color:var(--border);user-select:none}footer{border-top:1px solid var(--border);padding:28px 24px;max-width:var(--page-max);margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}footer span,footer a{font-size:12px;color:var(--text-dim);text-decoration:none;font-family:inherit}footer a:hover{color:var(--text)}.footer-links{display:flex;gap:16px;list-style:none}.legal{max-width:var(--reading-max);margin:0 auto;padding:100px 24px 80px}.legal h1{font-size:clamp(1.6rem,3vw,2rem);font-weight:400;margin-bottom:8px}.legal .updated{font-size:13px;color:var(--text-dim);margin-bottom:40px;font-family:inherit}.legal h2{font-size:18px;font-weight:600;margin:32px 0 12px;font-family:inherit}.legal p,.legal li{font-size:15px;color:var(--text-dim);line-height:1.8;margin-bottom:12px}.legal ul{padding-left:20px;margin-bottom:12px}.legal a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--border);text-underline-offset:3px;transition:text-decoration-color .2s}.legal a:hover{text-decoration-color:var(--ink)}@media(max-width:640px){.details-grid{grid-template-columns:1fr;gap:32px}.hero-icon-wrap{width:120px;height:120px}.hero-icon{width:120px;height:120px;border-radius:28px}.topbar-right a.hide-mobile{display:none}}[lang=zh-Hans] body{font-family:inherit;line-height:2}[lang=zh-Hans] .hero h1{font-weight:700;letter-spacing:0;font-size:clamp(2.8rem,7vw,4.2rem)}[lang=zh-Hans] .content h2,[lang=zh-Hans] .cta h2{font-weight:700;letter-spacing:0}[lang=zh-Hans] .feature-name{font-weight:700;font-family:inherit}[lang=zh-Hans] .topbar-left span{font-weight:700;letter-spacing:0;font-family:inherit}