@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}[hidden]{display:none!important}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,.account-link{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,.account-link{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,.account-link:hover,.account-link: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,.plans-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,.plans-lead,.plan-summary,.plan-feature-list li,.plan-disclaimer,.plan-note-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)}.button:disabled,.button[aria-disabled=true]{cursor:not-allowed;opacity:.58;transform:none;box-shadow:none}.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}.auth-shell,.legal-shell{min-height:100vh}.legal-page{display:grid;gap:28px;padding-top:28px}.legal-hero,.legal-document{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)}.legal-hero{display:grid;gap:18px;padding:clamp(30px,5vw,58px)}.legal-hero h1{max-width:11ch;font-size:clamp(2.8rem,5vw,5.1rem);line-height:.96;font-weight:620;letter-spacing:-.055em}html[lang=zh-CN] .legal-hero h1{line-height:1.04;font-weight:760}.legal-date{color:var(--md-primary);font-weight:680}.legal-intro{display:grid;gap:12px;max-width:46rem;color:var(--md-on-surface-variant);font-size:1.03rem;line-height:1.72}.legal-document{display:grid;gap:0;padding:clamp(18px,4vw,34px)}.legal-section{display:grid;gap:12px;padding:22px 0;border-bottom:1px solid var(--md-outline)}.legal-section:first-child{padding-top:0}.legal-section:last-child{padding-bottom:0;border-bottom:0}.legal-section h2{font-size:clamp(1.18rem,2vw,1.52rem);line-height:1.2;font-weight:720}.legal-section p,.legal-section li{color:var(--md-on-surface-variant);line-height:1.72}.legal-section ul{display:grid;gap:9px;padding-left:1.1rem}.legal-section li::marker{color:var(--md-primary)}.legal-related,.site-footer,.site-footer-links{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.legal-related{justify-content:flex-end}.site-footer{display:grid;justify-content:center;justify-items:center;gap:8px;padding:4px 0 0;color:var(--md-on-surface-variant);font-size:.92rem}.site-footer-links{justify-content:center}.site-footer a{border-radius:999px;padding:8px 12px;font-weight:560}.site-footer-copyright{color:color-mix(in srgb,var(--md-on-surface-variant) 78%,transparent);font-size:.86rem}.site-footer a:hover,.site-footer a:focus-visible{background:color-mix(in srgb,var(--md-primary-container) 52%,transparent);color:var(--md-on-surface)}.auth-page{display:grid;gap:18px;padding-top:22px}.auth-panel{display:grid;grid-template-columns:minmax(0,.85fr) minmax(320px,.65fr);gap:clamp(28px,5vw,64px);align-items:start;padding:clamp(28px,5vw,56px);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)}.account-panel{grid-template-columns:1fr;gap:22px;padding:clamp(24px,4vw,40px)}.account-panel[data-session-state=signed-out]{grid-template-columns:minmax(0,1fr) minmax(300px,.42fr);align-items:center;gap:clamp(28px,6vw,72px);min-height:clamp(360px,39vw,520px);padding:clamp(34px,5vw,58px)}.account-panel .auth-copy{gap:12px}.account-panel .auth-copy h1{font-size:clamp(2.6rem,5vw,4rem);letter-spacing:0}.account-panel .auth-copy>p:last-child{max-width:38rem;font-size:.98rem;line-height:1.55}.account-panel[data-session-state=signed-out] .account-dashboard-header{display:block}.account-panel[data-session-state=signed-out] .auth-copy{max-width:46rem}.account-panel[data-session-state=signed-out] .auth-copy h1{max-width:12ch;font-size:5.6rem;line-height:.96;letter-spacing:0}html[lang=zh-CN] .account-panel[data-session-state=signed-out] .auth-copy h1{max-width:8ch;line-height:1.04}.account-panel[data-session-state=signed-out] .auth-copy>p:last-child{max-width:42rem;font-size:1.12rem;line-height:1.68}.auth-copy{display:grid;gap:18px}.auth-copy h1{font-size:clamp(2.7rem,5vw,5rem);line-height:.96;font-weight:620;letter-spacing:-.055em}html[lang=zh-CN] .auth-copy h1{line-height:1.04;font-weight:760}.auth-copy p,.auth-form small,.account-state p,.account-details dt,.account-device-list span,.empty-devices p,.auth-message{color:var(--md-on-surface-variant)}.auth-copy>p:last-child{max-width:32rem;font-size:1.03rem;line-height:1.72}.auth-form{display:grid;gap:16px;padding:22px;border:1px solid var(--md-outline);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--md-surface-soft) 72%,transparent)}.auth-followup{align-self:start}.auth-form-heading{display:grid;gap:7px}.auth-form-heading h2{font-size:1.08rem;line-height:1.2;font-weight:720}.auth-form-heading p{color:var(--md-on-surface-variant);font-size:.94rem;line-height:1.55}.auth-form label{display:grid;gap:8px}.auth-form label>span{font-size:.9rem;font-weight:650}.auth-form input{width:100%;min-height:46px;padding:0 14px;border:1px solid var(--md-outline-strong);border-radius:14px;background:var(--md-surface-bright);color:var(--md-on-surface);font:inherit}.auth-form input:focus-visible{border-color:var(--md-primary);outline:3px solid color-mix(in srgb,var(--md-primary) 24%,transparent)}.plus-redeem-form input{width:100%;min-height:44px;padding:0 14px;border:1px solid var(--md-outline-strong);border-radius:14px;background:var(--md-surface-bright);color:var(--md-on-surface);font:inherit;letter-spacing:0;text-transform:uppercase}.plus-redeem-form input:focus-visible{border-color:var(--md-primary);outline:3px solid color-mix(in srgb,var(--md-primary) 24%,transparent)}.auth-submit{width:100%;margin-top:4px}.auth-provider-block{display:grid;gap:14px}.auth-divider{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;color:var(--md-on-surface-variant);padding:2px 0}.auth-divider:before,.auth-divider:after{content:"";height:1px;background:var(--md-outline)}.auth-divider span:before{content:"or";font-size:.86rem;font-weight:650}html[lang=zh-CN] .auth-divider span:before{content:"或"}.google-signin-slot{justify-self:center;width:min(100%,360px);min-height:46px;border-radius:999px;overflow:hidden;transition:border-color .18s ease,background .18s ease,transform .18s ease}.google-signin-slot:hover{transform:translateY(-1px)}@media(prefers-color-scheme:dark){.google-signin-slot{border:1px solid var(--md-outline-strong);background:color-mix(in srgb,var(--md-surface-bright) 86%,transparent);box-shadow:inset 0 1px color-mix(in srgb,var(--md-on-surface) 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auth-spin{to{transform:rotate(360deg)}}.auth-switch{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;color:var(--md-on-surface-variant);font-size:.94rem}.auth-link{border-radius:10px;color:var(--md-primary);font-weight:650}.auth-text-button{width:fit-content;justify-self:end;padding:0;border:0;background:transparent;cursor:pointer;font:inherit}.account-state{display:grid;gap:18px}.account-panel[data-session-state=signed-out] .account-state[data-signed-out]{align-content:center;justify-self:stretch;min-height:250px;padding:24px;border:1px solid var(--md-outline);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--md-surface-soft) 62%,transparent)}.account-panel[data-session-state=signed-out] .account-state h2{font-size:clamp(1.2rem,1.7vw,1.5rem)}.account-panel[data-session-state=signed-out] .account-state p{max-width:22rem;font-size:.98rem;line-height:1.58}.account-panel[data-session-state=signed-out] .account-state .actions{gap:10px}.account-state[data-signed-in]{gap:22px}.billing-panel,.device-panel,.account-details-panel,.account-session-panel{display:grid;gap:16px}.account-dashboard-header{display:flex;align-items:end;justify-content:space-between;gap:24px}.account-dashboard-header .auth-copy{max-width:46rem}.account-summary{display:grid;justify-items:end;gap:6px;min-width:min(100%,260px);padding:14px 16px;border:1px solid var(--md-outline);border-radius:var(--radius-md);background:color-mix(in srgb,var(--md-surface-soft) 34%,transparent)}.account-summary strong{color:var(--md-on-surface);font-size:1rem;overflow-wrap:anywhere}.account-summary span{color:var(--md-on-surface-variant);font-size:.9rem;font-weight:650}.account-dashboard{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.72fr);gap:14px;align-items:start}.account-ready-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;min-height:0;padding:18px 20px;border:1px solid var(--md-outline);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--md-primary-container) 34%,var(--md-surface-soft))}.account-ready-card h2{font-size:1.05rem;line-height:1.18;font-weight:700}.account-ready-card p{margin-top:4px;font-size:.95rem;line-height:1.5}.status-dot{width:10px;height:10px;margin-top:5px;border-radius:999px;background:#22c55e;box-shadow:0 0 0 5px #22c55e24}.account-state h2,.device-list-header h2{font-size:1.12rem;font-weight:700}.account-download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}.account-download-actions .button.primary{min-height:44px;padding-inline:20px}.billing-panel{grid-column:2;grid-row:1 / span 3;gap:14px;padding:18px;border:1px solid var(--md-outline);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--md-surface-soft) 54%,transparent)}.plus-redeem-link{width:fit-content;padding:0;border:0;border-radius:10px;background:transparent;color:var(--md-primary);cursor:pointer;font:inherit;font-size:.88rem;font-weight:680;text-align:left}.plus-redeem-link:hover,.plus-redeem-link:focus-visible{color:color-mix(in srgb,var(--md-primary) 82%,var(--md-on-surface));outline:none}.plus-redeem-link:focus-visible{outline:3px solid color-mix(in srgb,var(--md-primary) 24%,transparent);outline-offset:4px}.plus-redeem-dialog{width:min(calc(100% - 32px),430px);padding:0;border:1px solid var(--md-outline);border-radius:28px;background:var(--md-surface-bright);color:var(--md-on-surface);box-shadow:0 26px 90px var(--md-shadow)}.plus-redeem-dialog::backdrop{background:#00000075;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.plus-redeem-close-form{position:absolute;top:14px;right:14px}.plus-dialog-close{display:inline-grid;place-items:center;width:38px;height:38px;border:1px solid var(--md-outline);border-radius:999px;background:color-mix(in srgb,var(--md-surface-soft) 78%,transparent);color:var(--md-on-surface-variant);cursor:pointer;font:inherit;font-size:1.3rem;line-height:1}.plus-dialog-close:hover,.plus-dialog-close:focus-visible{color:var(--md-on-surface);outline:3px solid color-mix(in srgb,var(--md-primary) 20%,transparent)}.plus-redeem-form{display:grid;gap:16px;padding:28px}.plus-redeem-form h2{max-width:calc(100% - 48px);color:var(--md-on-surface);font-size:1.25rem;line-height:1.2;font-weight:720}.plus-redeem-form p{margin-top:4px;color:var(--md-on-surface-variant);font-size:.94rem;line-height:1.45}.plus-redeem-form label{display:grid;gap:7px}.plus-redeem-form label>span{color:var(--md-on-surface-variant);font-size:.86rem;font-weight:650}.billing-title-block{display:grid;gap:7px;min-width:0}.billing-title-block h2{color:var(--md-on-surface);font-size:1.12rem;line-height:1.18;font-weight:720}.billing-title-block p:last-child{color:var(--md-on-surface-variant);font-size:.9rem;line-height:1.5}.billing-stats{display:grid;gap:8px;margin:0}.billing-stats div{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:baseline;padding:0 0 9px;border-bottom:1px solid var(--md-outline)}.billing-stats dt,.billing-feature-heading{color:var(--md-on-surface-variant);font-size:.8rem;font-weight:650}.billing-stats dd{margin:0;color:var(--md-on-surface);font-size:.98rem;font-weight:720;text-align:right}.billing-hint{color:var(--md-on-surface-variant);font-size:.82rem;line-height:1.45}.billing-action-row{display:grid;gap:9px}.billing-panel .button{width:100%;min-height:44px;margin-top:0}.device-panel{grid-column:1;padding:18px 24px;border:1px solid var(--md-outline);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--md-surface-soft) 54%,transparent)}.account-details-panel{grid-column:1;gap:14px;padding:18px 24px;border:1px solid var(--md-outline);border-radius:18px;background:color-mix(in srgb,var(--md-surface-soft) 38%,transparent)}.account-deletion-copy{display:grid;gap:7px}.account-deletion-copy h3{color:var(--md-on-surface);font-size:.95rem;line-height:1.2;font-weight:720}.account-deletion-copy p{color:var(--md-on-surface-variant);font-size:.82rem;line-height:1.48}.account-deletion-form{display:grid;margin-top:12px}.button.danger{border-color:#dc2626;background:#dc2626;color:#fff;box-shadow:none}.button.danger:hover,.button.danger:focus-visible{background:#b91c1c}.account-details-heading{position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px}.account-details-heading h2{font-size:1rem;line-height:1.2;font-weight:720}.account-advanced-menu{position:relative;flex:0 0 auto}.account-advanced-menu summary{min-height:38px;padding-inline:16px;cursor:pointer;list-style:none}.account-advanced-menu summary::-webkit-details-marker{display:none}.account-advanced-popover{position:absolute;right:0;z-index:4;width:min(360px,calc(100vw - 64px));margin-top:10px;padding:14px;border:1px solid color-mix(in srgb,#dc2626 24%,var(--md-outline));border-radius:16px;background:color-mix(in srgb,var(--md-surface-bright) 94%,var(--md-surface-soft));box-shadow:0 18px 42px var(--md-shadow)}.account-details{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0;padding:0}.account-details div{display:grid;align-content:start;gap:7px;min-height:70px;padding:12px;border:1px solid var(--md-outline);border-radius:14px;background:color-mix(in srgb,var(--md-surface-panel) 36%,transparent)}.account-details dt{font-size:.8rem;font-weight:650}.account-details dd{margin:0;overflow-wrap:anywhere;font-size:.95rem;font-weight:560}.device-list-header{display:flex;align-items:start;justify-content:space-between;gap:16px}.device-list-header .button{flex:0 0 auto}.device-list-header .button,.account-details-heading .button,.account-session-panel .button{min-width:112px;min-height:42px;padding-inline:18px;font-family:inherit;font-size:1rem;font-weight:700;line-height:1}.account-session-panel{grid-column:1;justify-items:end}.device-list-header p{margin-bottom:4px;color:var(--md-primary);font-size:.82rem;font-weight:700}.account-device-list{display:grid;gap:8px;padding:0;list-style:none}.account-device-list li{display:grid;gap:4px;padding:12px 14px;border:1px solid var(--md-outline);border-radius:14px;background:color-mix(in srgb,var(--md-surface-soft) 72%,transparent)}.account-device-list strong,.account-device-list span{overflow-wrap:anywhere}.empty-devices{display:grid;gap:6px;padding:14px 0 2px}.empty-devices strong{color:var(--md-on-surface);font-size:.98rem}.auth-logout{width:fit-content}.auth-message{min-height:24px;padding:0 8px;font-size:.95rem;font-weight:560}.auth-message[data-type=success]{color:#15803d}.auth-message[data-type=error]{color:#dc2626}.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:""}.plans-layout{display:grid;gap:28px;padding:0 18px}.plans-copy{display:grid;gap:12px;max-width:62rem}.plan-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,3vw,28px)}.plan-card{display:grid;gap:22px;align-content:start;padding:clamp(26px,4vw,38px);border:1px solid var(--md-outline);border-radius:26px;background:color-mix(in srgb,var(--md-surface-panel) 90%,transparent)}.plan-card-highlight{border-color:color-mix(in srgb,var(--md-primary) 36%,var(--md-outline));background:color-mix(in srgb,var(--md-primary-container) 26%,var(--md-surface-panel))}.plan-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.plan-name{color:var(--md-on-surface-variant);font-size:.82rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.plan-price{margin-top:6px;font-size:2.7rem;line-height:.98;letter-spacing:0}.plan-badge{display:inline-flex;align-items:center;justify-content:center;min-height:30px;padding:0 12px;border-radius:999px;background:color-mix(in srgb,var(--md-primary-container) 88%,transparent);color:var(--md-primary);font-size:.78rem;font-weight:700}.plan-summary{max-width:38rem;font-size:1.04rem;line-height:1.78}.plan-feature-list{display:grid;gap:13px;padding:0;list-style:none}.plan-feature-list li{position:relative;padding-left:22px;font-size:1rem;line-height:1.6}.plan-feature-list li:before{position:absolute;top:.68em;left:0;width:8px;height:8px;border-radius:999px;background:var(--md-primary);content:""}.plan-note-panel{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;padding:0;color:var(--md-on-surface-variant);background:transparent}.plan-download-menu{width:fit-content}.plan-note-list{display:flex;flex-wrap:wrap;gap:8px 18px;padding:0;list-style:none}.plan-note-list li,.plan-disclaimer{font-size:.94rem;line-height:1.5}.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,.account-link:focus-visible,.auth-link:focus-visible,.site-footer a: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,.plan-grid,.download-band,.auth-panel,.account-panel[data-session-state=signed-out],.account-dashboard,.account-details{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}.auth-panel{gap:24px}.account-panel[data-session-state=signed-out]{min-height:0}.account-panel[data-session-state=signed-out] .auth-copy h1,html[lang=zh-CN] .account-panel[data-session-state=signed-out] .auth-copy h1{font-size:4rem}.account-dashboard-header{align-items:start;flex-direction:column}.account-summary{width:100%;justify-items:start}.billing-panel,.device-panel,.account-details-panel,.account-session-panel{grid-column:auto;grid-row:auto}}@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,.account-link{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,.plans-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)}.auth-page,.legal-page{padding-top:18px}.legal-hero,.legal-document{border-radius:28px}.legal-hero{padding:28px 22px 24px}.legal-hero h1,html[lang=zh-CN] .legal-hero h1{max-width:none;font-size:clamp(2.45rem,10vw,3.8rem)}.legal-document{padding:18px 20px}.auth-panel{padding:28px 22px 24px;border-radius:28px}.account-panel[data-session-state=signed-out]{padding:30px 22px 24px}.account-panel[data-session-state=signed-out] .auth-copy h1,html[lang=zh-CN] .account-panel[data-session-state=signed-out] .auth-copy h1{max-width:none;font-size:3.2rem}.account-panel[data-session-state=signed-out] .account-state[data-signed-out]{min-height:0;padding:18px;border-radius:22px}.account-panel[data-session-state=signed-out] .account-state .actions{display:grid;grid-template-columns:1fr;width:100%}.account-panel[data-session-state=signed-out] .account-state .button{width:100%;flex:none;min-width:0}.auth-copy h1,html[lang=zh-CN] .auth-copy h1{font-size:clamp(2.45rem,10vw,3.8rem)}.auth-form{padding:16px;border-radius:22px}.device-list-header{align-items:start;flex-direction:row}.billing-panel,.device-panel,.account-details-panel,.account-session-panel,.account-details{padding-left:18px;padding-right:18px}.account-session-panel{padding-left:0;padding-right:0}.account-details-heading{align-items:center;flex-direction:row}}