:root{color-scheme:light;--brand: #6698ff;--brand-2: #8b6cf0;--brand-strong: #3f78f5;--brand-ink: #ffffff;--grad-brand: linear-gradient(135deg, #6698ff 0%, #8b6cf0 100%);--bg: #ffffff;--bg-2: #f4f7fc;--ink: #0d1426;--ink-2: #3c4658;--muted: #5d6675;--card: #ffffff;--card-2: #f8fafd;--border: #e7ebf3;--border-strong: #d6deea;--ring: rgba(102, 152, 255, .4);--grid-dot: rgba(102, 152, 255, .16);--glow: rgba(102, 152, 255, .3);--shadow-sm: 0 1px 2px rgba(15, 30, 60, .06), 0 4px 12px rgba(15, 30, 60, .05);--shadow-md: 0 8px 24px -8px rgba(20, 40, 80, .18), 0 2px 6px rgba(20, 40, 80, .06);--shadow-lg: 0 30px 70px -30px rgba(40, 70, 140, .4);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans", "Noto Sans CJK SC", "Microsoft Yahei", "Hiragino Sans GB", Arial, sans-serif;--font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--container: 1160px;--radius: 16px}html.dark{color-scheme:dark;--brand: #6698ff;--brand-2: #9b86ff;--brand-strong: #84aaff;--brand-ink: #0a0e16;--grad-brand: linear-gradient(135deg, #6698ff 0%, #9b86ff 100%);--bg: #090d15;--bg-2: #0e1320;--ink: #eef2f9;--ink-2: #c3ccda;--muted: #8b97a9;--card: #111826;--card-2: #0d1422;--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .14);--ring: rgba(132, 170, 255, .5);--grid-dot: rgba(124, 156, 255, .14);--glow: rgba(102, 152, 255, .26);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 12px 30px -10px rgba(0, 0, 0, .6);--shadow-lg: 0 40px 90px -40px rgba(0, 0, 0, .8)}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.page{display:flex;min-height:100vh;flex-direction:column}a{color:inherit;text-decoration:none}h1,h2,h3{font-weight:800;letter-spacing:-.025em;line-height:1.06;margin:0}::selection{background:#6698ff40}:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1.1rem,4vw,2.5rem)}.text-grad{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .8s cubic-bezier(.16,.8,.24,1),transform .8s cubic-bezier(.16,.8,.24,1);transition-delay:var(--reveal-delay, 0ms);will-change:opacity,transform}[data-reveal].is-visible{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none;transition:none}}[data-spotlight]{position:relative}[data-spotlight]:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(240px circle at var(--mx, 50%) var(--my, -20%),color-mix(in srgb,var(--brand) 18%,transparent),transparent 62%);opacity:0;transition:opacity .35s ease;z-index:0}[data-spotlight]:hover:after{opacity:1}[data-spotlight]>*{position:relative;z-index:1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem 1.15rem;border-radius:999px;font-weight:700;font-size:.95rem;line-height:1.1;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;white-space:nowrap}.btn-sm{padding:.55rem .95rem;font-size:.9rem}.btn-lg{padding:.9rem 1.6rem;font-size:1.05rem}.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 1px #ffffff40 inset,0 10px 24px -10px var(--glow)}.btn-primary:hover{transform:translateY(-1px);filter:saturate(1.08) brightness(1.03);box-shadow:0 1px #ffffff4d inset,0 16px 32px -12px var(--glow)}.btn-primary:active{transform:translateY(0)}.btn__arrow{transition:transform .2s ease}.btn:hover .btn__arrow{transform:translate(3px)}.btn-ghost{background:var(--card);color:var(--ink);border-color:var(--border-strong);box-shadow:var(--shadow-sm)}.btn-ghost:hover{background:var(--bg-2);transform:translateY(-1px)}.btn-quiet{background:transparent;color:var(--ink);border-color:transparent}.btn-quiet:hover{background:var(--bg-2)}.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid transparent;background:color-mix(in srgb,var(--bg) 72%,transparent);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);transition:border-color .25s ease,box-shadow .25s ease,background .25s ease}.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:0 8px 30px -18px #14285059}.site-header__inner{max-width:var(--container);margin-inline:auto;padding:.7rem clamp(1.1rem,4vw,2.5rem);display:flex;align-items:center;gap:1rem}.brand{display:inline-flex;align-items:center}.brand__logo{height:26px;width:auto}.nav{display:flex;align-items:center;gap:.35rem;margin-left:.5rem}.nav__link{padding:.45rem .7rem;border-radius:.6rem;font-size:.92rem;font-weight:600;color:var(--ink-2);transition:color .15s ease,background .15s ease}.nav__link:hover{color:var(--ink);background:var(--bg-2)}.nav__actions{margin-left:auto;display:flex;align-items:center;gap:.6rem}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:999px;border:1px solid var(--border-strong);background:var(--card);color:var(--ink-2);cursor:pointer;box-shadow:var(--shadow-sm);transition:color .15s ease,background .15s ease,transform .12s ease}.icon-btn:hover{color:var(--ink);background:var(--bg-2)}.icon-moon,html.dark .icon-sun{display:none}html.dark .icon-moon{display:block}@media(max-width:820px){.nav{display:none}}@media(max-width:540px){.nav__login{display:none}.site-header__inner{gap:.5rem}}.section{padding-block:clamp(3.5rem,8vw,6.5rem)}.section-head{max-width:640px;margin-inline:auto;text-align:center;display:grid;gap:1rem;margin-bottom:clamp(2rem,5vw,3.5rem)}.section-head h2{font-size:clamp(1.9rem,4.2vw,2.9rem)}.section-head p{margin:0;color:var(--muted);font-size:clamp(1rem,2vw,1.15rem);line-height:1.55}.site-footer{margin-top:auto;border-top:1px solid var(--border);background:var(--bg-2)}.site-footer__inner{max-width:var(--container);margin-inline:auto;padding:clamp(2.5rem,5vw,3.5rem) clamp(1.1rem,4vw,2.5rem) 1.5rem;display:flex;flex-wrap:wrap;gap:2.5rem;justify-content:space-between}.site-footer__brand{max-width:280px}.site-footer__logo{height:24px;width:auto}.site-footer__brand p{margin:1rem 0 0;color:var(--muted);font-size:.95rem;line-height:1.5}.site-footer__cols{display:flex;flex-wrap:wrap;gap:2.5rem}.site-footer__col{display:grid;gap:.7rem;align-content:start}.site-footer__title{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.site-footer__col a{font-size:.95rem;color:var(--ink-2);transition:color .15s ease}.site-footer__col a:hover{color:var(--brand)}.site-footer__bottom{max-width:var(--container);margin-inline:auto;padding:1.25rem clamp(1.1rem,4vw,2.5rem);border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:.75rem;justify-content:space-between;color:var(--muted);font-size:.85rem}