@import"https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;800&family=Roboto+Flex:opsz,wght@8..144,400;8..144,500;8..144,600;8..144,700&display=swap";:root{color-scheme:light dark;--md-primary: #2563eb;--md-on-primary: #ffffff;--md-primary-container: rgba(37, 99, 235, .12);--md-secondary-container: rgba(76, 175, 80, .14);--md-surface: #f5f5f5;--md-surface-bright: #ffffff;--md-surface-panel: rgba(255, 255, 255, .78);--md-surface-soft: rgba(243, 244, 246, .88);--md-on-surface: #111111;--md-on-surface-variant: #6b7280;--md-outline: rgba(17, 24, 39, .12);--md-outline-strong: rgba(17, 24, 39, .2);--md-shadow: rgba(17, 24, 39, .1);--brand-logo-bg: #111111;--radius-xl: 34px;--radius-lg: 24px;--radius-md: 18px;--max-width: 1200px}@media(prefers-color-scheme:dark){:root{--md-primary: #60a5fa;--md-on-primary: #ffffff;--md-primary-container: rgba(96, 165, 250, .18);--md-secondary-container: rgba(165, 214, 167, .2);--md-surface: #0f0f10;--md-surface-bright: #17171a;--md-surface-panel: rgba(24, 24, 27, .78);--md-surface-soft: rgba(39, 39, 42, .9);--md-on-surface: #f3f4f6;--md-on-surface-variant: #9ca3af;--md-outline: rgba(229, 231, 235, .12);--md-outline-strong: rgba(229, 231, 235, .2);--md-shadow: rgba(0, 0, 0, .34);--brand-logo-bg: #2f2f2f}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:radial-gradient(circle at 12% 10%,color-mix(in srgb,var(--md-primary-container) 42%,transparent),transparent 28rem),radial-gradient(circle at 88% 3%,color-mix(in srgb,var(--md-primary-container) 62%,transparent),transparent 24rem),linear-gradient(180deg,var(--md-surface-bright),var(--md-surface));color:var(--md-on-surface);font-family:Roboto Flex,Noto Sans SC,sans-serif}a{color:inherit;text-decoration:none}h1,h2,h3,p,ul{margin:0}.site-shell{width:min(calc(100% - 48px),var(--max-width));margin:0 auto;padding:24px 0 72px}.top-app-bar{position:sticky;top:14px;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 16px;border:1px solid var(--md-outline);border-radius:999px;background:color-mix(in srgb,var(--md-surface-panel) 92%,transparent);box-shadow:0 10px 28px var(--md-shadow);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.brand{display:inline-flex;align-items:center;gap:12px;min-width:0;border-radius:999px}.brand-icon{width:40px;height:40px;border-radius:14px;background:var(--brand-logo-bg);box-shadow:0 10px 18px #0000001f;flex:0 0 auto}.brand-copy{display:grid;gap:1px}.brand-copy strong{font-size:1rem;font-weight:640}.brand-copy small{font-size:.78rem;color:var(--md-on-surface-variant)}.top-app-bar-actions{display:inline-flex;align-items:center;gap:10px}.nav-tabs{display:inline-flex;flex-wrap:wrap;gap:4px}.nav-tabs a,.language-switch{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 15px;border-radius:999px;font-size:.92rem}.nav-tabs a{color:var(--md-on-surface-variant);font-weight:560}.language-switch{border:1px solid var(--md-outline);background:color-mix(in srgb,var(--md-surface-soft) 82%,transparent);font-weight:620}.nav-tabs a:hover,.nav-tabs a:focus-visible,.language-switch:hover,.language-switch:focus-visible{background:color-mix(in srgb,var(--md-primary-container) 52%,transparent);color:var(--md-on-surface)}.page{display:grid;gap:54px;padding-top:28px}.hero,.flow-section,.scene-section,.download-section{scroll-margin-top:110px}.hero-frame{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:34px;align-items:stretch;padding:clamp(34px,5vw,60px);border:1px solid var(--md-outline);border-radius:var(--radius-xl);background:color-mix(in srgb,var(--md-surface-panel) 96%,transparent);box-shadow:0 18px 54px var(--md-shadow)}.hero-copy{display:grid;align-content:center;gap:22px;max-width:42rem}.eyebrow{width:fit-content;padding:8px 12px;border-radius:999px;background:color-mix(in srgb,var(--md-secondary-container) 90%,transparent);color:var(--md-on-surface-variant);font-size:.78rem;font-weight:620;letter-spacing:.015em}.section-lead.compact{color:var(--md-on-surface);font-size:clamp(1.35rem,2vw,1.7rem);line-height:1.14;letter-spacing:-.03em;font-weight:560}.hero-title{font-size:clamp(3rem,5.6vw,5.5rem);line-height:.95;letter-spacing:-.055em;font-weight:600}html[lang=zh-CN] .hero-title{line-height:1.02;font-weight:760;letter-spacing:-.06em}.hero-text,.download-band p,.step-grid p,.simple-list li{color:var(--md-on-surface-variant)}.hero-text{max-width:33rem;font-size:clamp(1.06rem,1.2vw,1.15rem);line-height:1.72}.actions{display:flex;flex-wrap:wrap;gap:12px}.download-menu{position:relative}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border:1px solid transparent;border-radius:999px;font-weight:650;cursor:pointer;list-style:none;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease}.button::-webkit-details-marker{display:none}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--md-primary);color:var(--md-on-primary);box-shadow:0 10px 24px color-mix(in srgb,var(--md-primary) 24%,transparent)}.button.ghost{border-color:var(--md-outline-strong);background:transparent;color:var(--md-on-surface)}.download-menu[open]>.button.primary{box-shadow:0 12px 28px color-mix(in srgb,var(--md-primary) 28%,transparent)}.download-menu-panel{position:absolute;right:0;top:calc(100% + 10px);min-width:220px;display:grid;gap:6px;padding:8px;border:1px solid var(--md-outline);border-radius:18px;background:color-mix(in srgb,var(--md-surface-panel) 98%,transparent);box-shadow:0 18px 36px var(--md-shadow);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);z-index:12}.download-menu.upward .download-menu-panel{top:auto;bottom:calc(100% + 10px)}.download-menu-panel a{display:flex;align-items:center;min-height:42px;padding:0 14px;border-radius:12px;color:var(--md-on-surface);font-size:.95rem;font-weight:560}.download-menu-panel a:hover,.download-menu-panel a:focus-visible{background:color-mix(in srgb,var(--md-primary-container) 72%,transparent);outline:none}.intent-example{width:fit-content;max-width:34rem;padding:12px 16px;border-radius:var(--radius-md);background:color-mix(in srgb,var(--md-surface-soft) 94%,transparent);color:var(--md-on-surface);font-size:.98rem;font-weight:560;line-height:1.55}.intent-wall{display:grid;align-content:end}.intent-list{display:grid;gap:12px;padding:0;list-style:none}.intent-list li{padding:18px 18px 20px;border-top:1px solid var(--md-outline);color:var(--md-on-surface-variant);font-size:1rem;line-height:1.62}.intent-list li:first-child{border-top:0}.flow-section{padding:0 18px}.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.step-grid article{display:grid;gap:10px;padding:22px 22px 24px;border-top:1px solid var(--md-outline-strong)}.step-index{color:var(--md-primary);font-size:.78rem;font-weight:700}.step-grid h2{font-size:clamp(1.6rem,2vw,2.1rem);line-height:1.03;letter-spacing:-.04em;font-weight:560}html[lang=zh-CN] .step-grid h2{font-weight:720}.step-grid p{max-width:22ch;font-size:.98rem;line-height:1.68}.scene-layout{display:grid;grid-template-columns:minmax(320px,.9fr) minmax(0,1.1fr);gap:28px;align-items:start;padding:0 18px}.section-lead{font-size:clamp(1.85rem,2.35vw,2.5rem);line-height:1.06;letter-spacing:-.045em;font-weight:560}html[lang=zh-CN] .section-lead{font-weight:720}.simple-list{display:grid;gap:10px;padding:0;list-style:none}.simple-list li{position:relative;padding:14px 0 14px 22px;border-top:1px solid var(--md-outline);font-size:1.02rem;line-height:1.7}.simple-list li:before{position:absolute;top:23px;left:2px;width:8px;height:8px;border-radius:50%;background:var(--md-primary);content:""}.download-band{display:flex;align-items:end;justify-content:space-between;gap:28px;padding:28px 18px 0;border-top:1px solid var(--md-outline-strong)}.download-band>div:first-child{max-width:46rem}.download-band p{max-width:38rem;font-size:1rem;line-height:1.72}.download-band .section-lead.compact+p{margin-top:14px}.requirement-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.requirement-chips span{display:inline-flex;align-items:center;min-height:34px;padding:7px 12px;border:1px solid var(--md-outline);border-radius:999px;color:var(--md-on-surface-variant);font-size:.92rem;line-height:1.35}.button:focus-visible,.nav-tabs a:focus-visible,.brand:focus-visible,.language-switch:focus-visible{outline:3px solid var(--md-primary);outline-offset:4px}@media(prefers-reduced-motion:no-preference){.hero-frame{animation:rise-in .68s cubic-bezier(.2,0,0,1) both}}@keyframes rise-in{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@media(max-width:980px){.site-shell{width:min(calc(100% - 32px),var(--max-width))}.hero-frame,.scene-layout,.download-band{grid-template-columns:1fr}.hero-frame{gap:22px}.intent-wall{align-content:start}.intent-list{grid-template-columns:repeat(3,minmax(0,1fr))}.intent-list li{border-top:1px solid var(--md-outline-strong)}.step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.download-band{display:grid;align-items:start}}@media(max-width:720px){.site-shell{width:min(calc(100% - 32px),var(--max-width));padding:16px 0 48px}.top-app-bar{position:static;flex-wrap:wrap;align-items:center;padding:12px;border-radius:28px}.brand{flex:1 1 auto;min-width:0}.brand-icon{width:32px;height:32px;border-radius:12px}.brand-copy strong{font-size:.96rem}.brand-copy small{display:none}.top-app-bar-actions{width:100%;justify-content:space-between}.nav-tabs{flex:1;min-width:0}.nav-tabs a{flex:1;min-height:34px;padding:0 10px;font-size:.86rem}.language-switch{min-height:34px;padding:0 13px;font-size:.86rem}.page{gap:40px;padding-top:18px}.hero-frame{padding:28px 22px 24px;gap:20px;border-radius:28px}.hero-title,html[lang=zh-CN] .hero-title{max-width:none;font-size:clamp(2.55rem,10.5vw,4rem);line-height:.98}.hero-text{font-size:1rem}.intent-example{width:100%}.intent-list{grid-template-columns:1fr;gap:0}.intent-list li{padding:14px 0 15px}.flow-section,.scene-layout,.download-band{padding-left:4px;padding-right:4px}.step-grid{grid-template-columns:1fr;gap:10px}.step-grid article{padding-left:4px;padding-right:4px}.step-grid h2{max-width:none;font-size:clamp(1.6rem,7vw,2rem)}.scene-layout{gap:18px}.section-lead,html[lang=zh-CN] .section-lead{max-width:none;font-size:clamp(1.55rem,7.2vw,2rem)}.section-lead.compact{max-width:none;font-size:1.2rem;line-height:1.22}.download-band{gap:22px;padding-top:22px}.download-band .actions{width:100%}.download-band .button{flex:1 1 0;min-width:0}.download-menu{flex:1 1 0}.download-menu>.button{width:100%}.download-menu-panel{left:0;right:0;min-width:0}.download-menu.upward .download-menu-panel{top:auto;bottom:calc(100% + 10px)}}