:root{--font-display:"Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;--font-body:"Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;--font-mono:"Menlo", "SFMono-Regular", "Monaco", monospace;--sand-50:#fbf7ef;--ink-900:#14253c;--ink-800:#1f3552;--shadow-card:0 18px 38px #193e6724;--radius-lg:22px;--container:min(1160px, calc(100vw - 4rem));--space-section:clamp(4rem, 6vw, 7rem);--space-block:clamp(2rem, 3vw, 3.5rem)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;color:var(--ink-900);background:radial-gradient(circle at top left, #6abbe759, transparent 30%), radial-gradient(circle at 80% 22%, #ffb6822e, transparent 24%), linear-gradient(180deg, #fffdf8 0%, var(--sand-50) 56%, #eef4f8 100%);font-family:var(--font-body), sans-serif;margin:0}main[lang=zh-CN]{font-family:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", var(--font-body), sans-serif}main[lang=zh-CN] h1,main[lang=zh-CN] h2,main[lang=zh-CN] h3,main[lang=zh-CN] h4,main[lang=zh-CN] .brand__name{letter-spacing:-.03em;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}a{color:inherit;text-decoration:none}button,a{transition:transform .16s,box-shadow .16s,background-color .16s,border-color .16s,color .16s}img{max-width:100%;display:block}.site-shell{position:relative;overflow:hidden}.site-shell:before,.site-shell:after{content:"";pointer-events:none;z-index:0;position:absolute;inset:auto}.site-shell:before{background:radial-gradient(circle,#4ca4dc24,#0000 64%);width:34rem;height:34rem;top:7rem;right:-14rem}.site-shell:after{background:radial-gradient(circle,#f2c57533,#0000 66%);width:28rem;height:28rem;top:34rem;left:-12rem}.page{z-index:1;position:relative}.container{width:var(--container);margin:0 auto}.topbar{padding:1.5rem 0 0}.topbar__inner{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffff9e;border:1px solid #1f355214;border-radius:999px;justify-content:space-between;align-items:center;gap:1rem;padding:1.15rem 1.5rem;display:flex;box-shadow:0 10px 30px #1f355214}.brand{align-items:center;gap:.85rem;display:inline-flex}.brand__mark{background:linear-gradient(135deg,#84c8efcc,#14253c2e);border-radius:18px;width:2.6rem;height:2.6rem;padding:.38rem;overflow:hidden;box-shadow:inset 0 1px #ffffff6b}.brand__mark img{object-fit:contain;width:100%;height:100%}.brand__name{font-family:var(--font-display), sans-serif;letter-spacing:.02em;font-size:1.12rem;font-weight:700}.brand__tagline{color:#14253cb8;font-size:.92rem}.locale-switcher{background:#14253c0f;border-radius:999px;gap:.45rem;padding:.3rem;display:inline-flex}.locale-switcher a{color:#14253cb8;border-radius:999px;padding:.55rem .9rem;font-size:.92rem}.locale-switcher a.is-active{color:var(--ink-900);background:#fff;box-shadow:0 6px 16px #1f35521f}.hero{padding:var(--space-section) 0 var(--space-section)}.hero__inner{grid-template-columns:minmax(0,1.05fr) minmax(280px,.95fr);align-items:start;gap:3rem;display:grid}.hero h1{max-width:10.5ch;font-family:var(--font-display), sans-serif;letter-spacing:-.05em;margin:1.5rem 0 0;font-size:clamp(3.2rem,5.2vw,5.9rem);line-height:.95}.hero__lede{color:#14253cc2;max-width:52ch;margin:1.75rem 0 0;font-size:1.12rem;line-height:1.75}.cta-row{flex-wrap:wrap;gap:.9rem;margin:2.25rem 0 0;display:flex}.button{border:1px solid #0000;border-radius:18px;justify-content:center;align-items:center;gap:.6rem;min-height:3.4rem;padding:.9rem 1.2rem;font-weight:700;display:inline-flex}.button:hover,.button:focus-visible{transform:translateY(-1px)}.button--primary{color:#fff;background:linear-gradient(135deg,#2a507c,#4ca4dc);box-shadow:0 18px 26px #2a507c47}.button--secondary{background:#ffffffd6;border-color:#1f355224}.hero__screenshot{justify-content:center;align-items:start;display:flex}.screenshot-frame{background:linear-gradient(#0f1722,#202c3c);border-radius:22px;overflow:hidden;box-shadow:inset 0 1px #ffffff14}.screenshot-frame img{width:100%;height:auto}.features{padding:var(--space-section) 0}.features__title{font-family:var(--font-display), sans-serif;letter-spacing:-.04em;margin:0;font-size:clamp(2.1rem,3vw,3.25rem);line-height:1}.feature-grid{margin-top:var(--space-block);grid-template-columns:repeat(4,minmax(0,1fr));gap:1.5rem;display:grid}.feature-card{border-radius:var(--radius-lg);box-shadow:var(--shadow-card);background:#ffffffc7;border:1px solid #1f355214;padding:1.6rem}.feature-card__index{width:2.1rem;height:2.1rem;color:var(--ink-800);font-family:var(--font-mono), monospace;background:#4ca4dc24;border-radius:999px;justify-content:center;align-items:center;font-size:.85rem;display:inline-flex}.feature-card h3{margin:1.2rem 0 0;font-size:1.1rem}.feature-card p{color:#14253cb8;margin:.85rem 0 0;line-height:1.7}.footer{padding:var(--space-section) 0 3.5rem}.footer__inner{justify-content:space-between;align-items:center;gap:1rem;padding:1.5rem 1.6rem;display:flex}.footer-links{flex-wrap:wrap;gap:.75rem;display:flex}.footer-links a{background:#14253c0d;border-radius:999px;padding:.7rem .95rem}@media (max-width:1040px){.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:860px){.hero__inner{grid-template-columns:1fr}.hero h1{max-width:none}.topbar__inner{border-radius:28px}}@media (max-width:640px){.topbar__inner,.footer__inner{flex-direction:column;align-items:flex-start}.locale-switcher{width:100%}.locale-switcher a{text-align:center;flex:1 1 0}.feature-grid{grid-template-columns:1fr}.cta-row,.footer-links,.button{width:100%}.feature-card{padding:1.35rem}}