:root{--md-sys-color-primary: #6750a4;--md-sys-color-on-primary: #ffffff;--md-sys-color-primary-container: #eaddff;--md-sys-color-on-primary-container: #21005d;--md-sys-color-secondary: #625b71;--md-sys-color-on-secondary: #ffffff;--md-sys-color-surface: #fffbfe;--md-sys-color-surface-container: #f3edf7;--md-sys-color-surface-variant: #e7e0ec;--md-sys-color-on-surface: #1d1b20;--md-sys-color-on-surface-variant: #49454f;--md-sys-color-outline: #79747e;--shadow-ambient: 0 16px 48px rgba(33, 0, 93, .08)}@media(prefers-color-scheme:dark){:root{--md-sys-color-primary: #cfbcff;--md-sys-color-on-primary: #381e72;--md-sys-color-primary-container: #4f378b;--md-sys-color-on-primary-container: #eaddff;--md-sys-color-secondary: #cbc2db;--md-sys-color-on-secondary: #332d41;--md-sys-color-surface: #141218;--md-sys-color-surface-container: #1d1b20;--md-sys-color-surface-variant: #49454f;--md-sys-color-on-surface: #e6e0e9;--md-sys-color-on-surface-variant: #cac4d0;--md-sys-color-outline: #938f99;--shadow-ambient: 0 24px 60px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:Plus Jakarta Sans,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;color:var(--md-sys-color-on-surface);background:radial-gradient(circle at 12% 18%,color-mix(in srgb,var(--md-sys-color-primary-container) 55%,transparent),transparent 40%),radial-gradient(circle at 86% 8%,color-mix(in srgb,var(--md-sys-color-primary) 18%,transparent),transparent 36%),linear-gradient(160deg,var(--md-sys-color-surface),color-mix(in srgb,var(--md-sys-color-surface-container) 70%,var(--md-sys-color-surface)));line-height:1.6}a{color:inherit;text-decoration:none}.wrap{width:min(1080px,calc(100% - 48px));margin:0 auto}.hero{padding-top:16px}.hero-main{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,360px);gap:26px;align-items:center;padding:24px 0 28px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 14px;border:0;border-radius:12px;background:color-mix(in srgb,var(--md-sys-color-surface) 92%,transparent);box-shadow:0 6px 20px color-mix(in srgb,var(--md-sys-color-outline) 14%,transparent)}.brand{display:inline-flex;align-items:center;gap:10px;font-size:1.08rem;font-weight:800;letter-spacing:.01em}.brand-logo{display:block;width:34px;height:34px;border-radius:50%}.brand-text{display:inline-block;line-height:1}.topbar-actions{display:flex;align-items:center;gap:8px}.top-link,.lang-switch{display:inline-flex;align-items:center;justify-content:center;padding:8px 12px;border-radius:10px;border:0;background:transparent;font-weight:600;font-size:.87rem;color:var(--md-sys-color-on-surface-variant);transition:background-color .18s ease,color .18s ease}.top-link.nav-text:hover,.lang-switch:hover{background:color-mix(in srgb,var(--md-sys-color-primary-container) 68%,transparent);color:var(--md-sys-color-on-primary-container)}.hero-content{max-width:680px}.hero-visual{justify-self:end}.hero-image-wrap{justify-self:center;border-radius:0;padding:0;background:transparent;box-shadow:none}.hero-image{display:block;width:min(320px,100%);height:auto;border-radius:0;filter:drop-shadow(0 14px 26px rgba(0,0,0,.18))}.hero h1{margin:0 0 12px;font-size:clamp(2rem,5.6vw,3.45rem);line-height:1.14;letter-spacing:-.02em}.hero-subtitle{margin:0;max-width:680px;color:var(--md-sys-color-on-surface-variant);font-size:clamp(1rem,2.2vw,1.18rem)}.hero-actions,.download-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}.hero-feature-block{margin-top:18px}.hero-feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.hero-feature-item{border-radius:12px;border:1px solid color-mix(in srgb,var(--md-sys-color-outline) 18%,transparent);background:color-mix(in srgb,var(--md-sys-color-surface-container) 84%,transparent);padding:10px 12px}.hero-feature-item h3{margin:0;font-size:.9rem;line-height:1.35}.hero-feature-item p{margin:4px 0 0;color:var(--md-sys-color-on-surface-variant);font-size:.82rem;line-height:1.4}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 18px;border-radius:14px;font-weight:700;letter-spacing:.01em;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{color:var(--md-sys-color-on-primary);background:var(--md-sys-color-primary);box-shadow:0 10px 24px color-mix(in srgb,var(--md-sys-color-primary) 35%,transparent)}.btn-primary:hover{box-shadow:0 16px 34px color-mix(in srgb,var(--md-sys-color-primary) 40%,transparent)}.btn-ghost{border-color:color-mix(in srgb,var(--md-sys-color-outline) 26%,transparent);color:var(--md-sys-color-on-surface-variant);background:color-mix(in srgb,var(--md-sys-color-surface-container) 72%,transparent)}.section{padding:34px 0}.section h2{margin:0 0 18px;font-size:clamp(1.5rem,3.3vw,2rem);line-height:1.2}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.feature-card{background:color-mix(in srgb,var(--md-sys-color-surface-container) 88%,transparent);border:1px solid color-mix(in srgb,var(--md-sys-color-outline) 20%,transparent);border-radius:18px;padding:20px;animation:cardFade .52s ease both;animation-delay:calc(var(--stagger) * 90ms)}.feature-card h3{margin:0 0 8px;font-size:1.04rem}.feature-card p{margin:0;color:var(--md-sys-color-on-surface-variant)}.download-card{border-radius:22px;border:1px solid color-mix(in srgb,var(--md-sys-color-outline) 26%,transparent);background:color-mix(in srgb,var(--md-sys-color-surface-container) 92%,transparent);padding:24px;box-shadow:var(--shadow-ambient)}.download-card p{margin:0;color:var(--md-sys-color-on-surface-variant)}.download-loading,.download-error{margin-top:14px;font-size:.95rem}.download-error{color:#b3261e}.download-meta{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0 0}.download-meta div{padding:10px 12px;border-radius:12px;background:color-mix(in srgb,var(--md-sys-color-surface-variant) 70%,transparent)}.download-meta dt{margin:0;font-size:.78rem;color:var(--md-sys-color-on-surface-variant)}.download-meta dd{margin:2px 0 0;font-size:.95rem;font-weight:700;overflow-wrap:anywhere}.footer{padding:24px 0 44px;display:flex;justify-content:center;align-items:center;gap:14px;color:var(--md-sys-color-on-surface-variant);font-size:.93rem}.footer p{margin:0}.reveal{opacity:0;transform:translateY(10px);transition:opacity .46s ease,transform .46s ease}.reveal.is-visible{opacity:1;transform:translateY(0)}@keyframes cardFade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:860px){.wrap{width:min(1080px,calc(100% - 28px))}.topbar{flex-wrap:wrap;gap:10px}.hero-main{grid-template-columns:1fr;padding-top:18px}.hero-visual{justify-self:center}.hero-feature-list,.download-meta{grid-template-columns:1fr}.footer{flex-direction:column;align-items:center}}@media(max-width:520px){.brand-logo{width:30px;height:30px}.topbar-actions{width:100%;justify-content:flex-start}.top-link,.lang-switch{flex:0 0 auto;text-align:left}}