:root{--canvas: #fafafa;--elevated: #ffffff;--inset: #f2f2f2;--ink: #171717;--body: #4d4d4d;--mute: #8f8f8f;--faint: #a1a1a1;--hairline: #ebebeb;--link: #0070f3;--link-deep: #0761d1;--link-soft: #d3e5ff;--primary: #171717;--on-primary: #ffffff;--error: #ee0000;--error-deep: #c50000;--shadow-1: 0 1px 1px rgba(0, 0, 0, .04);--shadow-2: 0 2px 2px rgba(0, 0, 0, .04), 0 8px 16px -4px rgba(0, 0, 0, .08);--sans: "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;--mono: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;--r-sm: 6px;--r-md: 12px;--r-lg: 16px;--r-pill: 100px;--r-cat: 64px}html.dark{--canvas: #0a0a0a;--elevated: #141414;--inset: #1f1f1f;--ink: #ededed;--body: #a1a1a1;--mute: #7d7d7d;--faint: #666666;--hairline: #262626;--link: #3292ff;--link-deep: #50b0ff;--link-soft: #0c2d57;--primary: #ededed;--on-primary: #0a0a0a;--error: #f5222d;--error-deep: #ff4d4f;--shadow-1: 0 1px 1px rgba(0, 0, 0, .4);--shadow-2: 0 2px 2px rgba(0, 0, 0, .4), 0 8px 16px -4px rgba(0, 0, 0, .5)}*{box-sizing:border-box}html{overflow-y:scroll;scrollbar-gutter:stable}body{margin:0;overflow-x:clip;font-family:var(--sans);background:var(--canvas);color:var(--ink);font-size:14px;line-height:20px;-webkit-font-smoothing:antialiased}a{color:var(--link);text-decoration:none}a:hover{color:var(--link-deep)}::selection{background:var(--ink);color:var(--on-primary)}.header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--canvas) 82%,transparent);-webkit-backdrop-filter:saturate(1.6) blur(12px);backdrop-filter:saturate(1.6) blur(12px)}.header-inner{max-width:1440px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:10px;cursor:pointer;-webkit-user-select:none;user-select:none}.brand:hover h1{opacity:.75}.brand h1{margin:0;font-size:16px;font-weight:600;letter-spacing:-.32px;line-height:20px}.tagline{margin:0;font-family:var(--mono);font-size:11px;line-height:14px;color:var(--mute)}.header-right{display:flex;align-items:center;gap:10px}.stat{text-align:right;line-height:1.2}.stat b{display:block;font-size:14px;font-weight:500;letter-spacing:-.28px;color:var(--ink)}.stat span{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.4px;color:var(--mute)}.stat+.stat{padding-left:10px;border-left:1px solid var(--hairline)}.icon-btn{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;background:var(--elevated);border:1px solid var(--hairline);border-radius:9999px;color:var(--ink);cursor:pointer;padding:0}.icon-btn:hover{border-color:var(--faint);box-shadow:var(--shadow-1)}.icon-btn svg{width:16px;height:16px}.main{max-width:1440px;margin:0 auto;padding:0 24px 96px}.hero{position:relative;text-align:center;padding:96px 0 48px}.hero:before{content:"";position:absolute;top:-140px;bottom:-48px;left:50%;transform:translate(-50%);width:100vw;pointer-events:none;background:radial-gradient(28% 42% at 22% 34%,rgba(0,124,240,.5) 0%,transparent 100%),radial-gradient(24% 38% at 38% 20%,rgba(0,223,216,.42) 0%,transparent 100%),radial-gradient(26% 42% at 55% 36%,rgba(121,40,202,.4) 0%,transparent 100%),radial-gradient(22% 36% at 68% 52%,rgba(255,0,128,.28) 0%,transparent 100%),radial-gradient(24% 40% at 82% 30%,rgba(249,203,40,.32) 0%,transparent 100%);filter:blur(72px) saturate(1.3);opacity:.45;z-index:-1}html.dark .hero:before{opacity:.24}.hero h2{margin:0 auto;max-width:720px;font-size:48px;font-weight:600;line-height:48px;letter-spacing:-2.4px}.hero .lead{margin:16px auto 32px;max-width:560px;font-size:16px;line-height:24px;color:var(--body)}.add-box{display:flex;align-items:center;gap:8px;max-width:640px;margin:0 auto;padding:6px 6px 6px 22px;background:var(--elevated);border:1px solid var(--hairline);border-radius:var(--r-pill);box-shadow:var(--shadow-1);transition:border-color .15s ease,box-shadow .15s ease}.add-input{flex:1;min-width:0;padding:8px 0;font-family:var(--sans);font-size:14px;border:none;background:transparent;color:var(--ink);outline:none}.add-input::placeholder{color:var(--faint)}.add-box:focus-within{border-color:var(--ink);box-shadow:0 0 0 4px var(--link-soft)}html.dark .add-box:focus-within{box-shadow:0 0 0 4px #3292ff40}.hero-hint{margin:16px 0 0;font-family:var(--mono);font-size:11px;color:var(--mute)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 14px;font-family:var(--sans);font-size:14px;font-weight:500;line-height:20px;border-radius:var(--r-sm);border:1px solid 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