:root{--paper:#f8f9fc;--surface:#fff;--ink:#17171b;--muted:#646570;--line:#e4e4eb;--purple:#5b18ed;--lavender:#eee8ff;--font:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;--display:"Songti SC","STSong","Noto Serif CJK SC",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.8 var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.25}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--purple);outline-offset:5px}button:disabled{opacity:.4;cursor:default}.wrap{width:min(1180px,calc(100% - 80px));margin-inline:auto}.skip{position:fixed;top:-100px;left:20px;padding:12px;background:white;z-index:100}.skip:focus{top:10px}.header{height:96px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;font-size:20px;font-weight:750;white-space:nowrap}.brand img{border-radius:12px}.header nav{display:flex;align-items:center;gap:32px;font-size:14px;font-weight:600}.header nav a:not(.nav-cta):hover,.text-link:hover{color:var(--purple)}.nav-cta{padding:11px 20px;border-radius:99px;background:var(--ink);color:white}.menu{display:none}.hero{display:grid;grid-template-columns:1.08fr 1fr;gap:28px;align-items:center;padding:60px 0 72px;min-height:840px}.kicker{font-size:12px;font-weight:650;letter-spacing:.12em;color:var(--purple);margin-bottom:24px}.hero h1{font:600 clamp(52px,5.3vw,76px)/1.4 var(--display);letter-spacing:-.055em;margin-bottom:28px}.underline{position:relative;white-space:nowrap}.underline:after{content:"";position:absolute;height:7px;bottom:1px;left:2px;right:12px;background:var(--purple);border-radius:10px;opacity:.7}.lead{max-width:450px;color:var(--muted);font-size:17px;line-height:1.95}.actions{display:flex;align-items:center;gap:28px;margin-top:36px}.button{border:0;display:inline-flex;align-items:center;justify-content:center;padding:14px 24px;border-radius:99px;font-size:15px;line-height:1.5;font-weight:650;min-height:50px;transition:background .18s,transform .18s}.button:hover{transform:translateY(-2px)}.primary{background:var(--purple);color:white}.primary:hover{background:#4511b9}.secondary{background:white;border:1px solid var(--line)}.text-link{font-size:14px;border-bottom:1px solid var(--line);padding:10px 0}.hero-notes{display:flex;gap:20px;margin-top:55px;font-size:12px;color:var(--muted)}.hero-notes span+span:before{content:"·";margin-right:20px}.hero-art{position:relative;min-width:0;height:705px;display:flex;align-items:center;justify-content:center}.hero-art:before{content:"";position:absolute;inset:55px -15px 20px;border-radius:50%;background:radial-gradient(ellipse,var(--lavender),transparent 70%);z-index:-1}.phone{width:300px;border:6px solid var(--ink);border-radius:43px;background:white;overflow:hidden;box-shadow:0 22px 45px #29213918;flex-shrink:0}.phone img{width:100%;height:auto}.hero-phone{width:310px;transform:rotate(3deg)}.annotation{position:absolute;z-index:2;top:0;left:8px;display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.04em;background:var(--surface);border:1px solid var(--line);padding:9px 16px;border-radius:99px}.annotation-dot{width:6px;height:6px;border-radius:50%;background:var(--purple)}.margin-note{position:absolute;right:-8px;bottom:65px;border-left:3px solid var(--purple);background:rgba(255,255,255,.96);box-shadow:0 10px 30px #3022440c;padding:18px 24px;transform:rotate(-3deg);border-radius:0 18px 18px 0}.margin-note span{font-size:25px;font-weight:700;display:block}.margin-note b{font-size:13px;font-weight:500;display:block;margin-top:5px}.margin-note small{font-size:10px;color:var(--muted);letter-spacing:.14em}.subject-band{border-block:1px solid var(--line);background:white}.subject-band>.wrap{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-block:25px}.subject-band p{font-size:13px;color:var(--muted)}.subject-band .wrap>div{display:flex;gap:32px;font-weight:650;font-size:15px}.section{padding-block:108px}.section-heading{margin-bottom:45px}.section-heading>p:last-child:not(.kicker){margin-top:24px;color:var(--muted);max-width:580px}h2{font-size:clamp(30px,3.5vw,46px);font-weight:650;letter-spacing:-.035em;line-height:1.45}h3{font-size:24px;font-weight:650;letter-spacing:-.025em}.study-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.study-grid article{padding:38px 40px;background:white;border:1px solid var(--line);border-radius:24px}.feature-label{font-size:12px;color:var(--purple);display:block;margin-bottom:24px}.study-grid p{font-size:15px;line-height:1.9;color:var(--muted);margin-top:18px}.chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:25px 0 0}.chips li{padding:5px 12px;background:var(--paper);border-radius:8px;font-size:12px;color:var(--muted)}.story{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:80px;margin-bottom:100px}.story-media{height:690px;display:flex;align-items:flex-start;justify-content:center;overflow:hidden;border-radius:30px;padding:34px 20px 0}.lavender{background:var(--lavender)}.mist{background:#eef0f5}.story-media .phone{width:300px}.story-copy h2 span{color:var(--purple)}.story-copy>p:not(.kicker){color:var(--muted);margin-top:25px;line-height:1.9;font-size:15px}.detail-list{padding:0;list-style:none;margin:28px 0 0}.detail-list li{padding:17px 0;border-top:1px solid var(--line)}.detail-list b{font-size:15px;font-weight:600;display:block}.detail-list span{font-size:13px;color:var(--muted);display:block;margin-top:5px}.reverse .story-media{grid-column:2;grid-row:1}.reverse .story-copy{grid-column:1;grid-row:1}.fine{font-size:12px!important;color:var(--muted);line-height:1.85}.review-section{background:white;padding:90px 0}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:42px}.review-grid h3{font-size:21px;margin:24px 0 15px}.review-grid p{font-size:14px;color:var(--muted);line-height:1.9}.symbol{width:48px;height:48px;display:grid;place-items:center;border-radius:14px;background:var(--lavender);color:var(--purple);font:500 23px var(--display)}.gallery-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px}.gallery-controls{display:flex;gap:10px}.gallery-controls button{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:white;font-size:20px}.gallery{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:max(40px,calc((100vw - 1180px)/2));padding:48px max(40px,calc((100vw - 1180px)/2)) 30px;scrollbar-width:thin;scrollbar-color:#c6c0d4 transparent;overscroll-behavior-x:contain}.gallery figure{flex:0 0 250px;scroll-snap-align:start;margin:0;min-width:0}.screenshot-button{display:block;border:4px solid var(--ink);border-radius:33px;background:white;padding:0;overflow:hidden;width:100%;transition:transform .2s}.screenshot-button:hover{transform:translateY(-4px)}.screenshot-button img{width:100%;height:auto}.gallery figcaption{margin-top:20px}.gallery figcaption b{display:block;font-size:15px;font-weight:650}.gallery figcaption span{display:block;font-size:12px;color:var(--muted);margin-top:3px}.screenshot-section>.fine{margin-top:20px}.ipad-section{border-radius:32px;background:var(--lavender);padding:60px 65px 0;overflow:hidden}.ipad-heading{text-align:center;max-width:650px;margin:0 auto 45px}.ipad-heading>p:last-child{color:var(--muted);margin-top:20px;font-size:14px}.tablet{border:8px solid var(--ink);border-radius:28px 28px 0 0;border-bottom:0;background:var(--ink);box-shadow:0 20px 50px #17171b26;overflow:hidden;max-height:630px}.tablet img{width:100%;height:auto}.membership-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}.plan{padding:34px 28px;border:1px solid var(--line);border-radius:24px;background:white;position:relative;display:flex;flex-direction:column}.plan h3{font-size:28px;margin-bottom:8px}.plan-intro{font-size:13px;color:var(--muted);margin-bottom:25px}.plan ul{padding-left:17px;margin:0 0 25px;font-size:13px;line-height:2.25}.plan li::marker{color:var(--purple)}.plan>.fine{margin-top:auto}.featured{border-color:var(--purple);background:#f5f1ff}.plan-mark{position:absolute;top:-14px;right:24px;background:var(--purple);color:white;font-size:11px;padding:4px 12px;border-radius:99px}.membership-note{margin-top:24px}.download{text-align:center;background:var(--lavender);border-radius:32px;padding:65px 45px}.download>img{margin:0 auto 20px;border-radius:20px}.download .kicker{margin-bottom:18px}.download>p:not(.kicker){margin-top:18px;color:var(--muted)}.download-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin:30px 0 22px}.faq{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.faq details{border-bottom:1px solid var(--line)}summary{padding:23px 28px 23px 0;cursor:pointer;font-size:16px;font-weight:550;list-style:none;position:relative}summary::-webkit-details-marker{display:none}summary:after{content:"+";position:absolute;right:0;color:var(--purple);font-size:22px;font-weight:400;top:18px}details[open] summary:after{content:"−"}.faq details p{padding:0 20px 25px 0;color:var(--muted);font-size:14px}.faq a{text-decoration:underline;text-underline-offset:3px;color:var(--purple)}.footer{border-top:1px solid var(--line);padding:40px 0 28px;display:grid;grid-template-columns:1fr 1fr;gap:28px}.footer>div>p{font-size:13px;color:var(--muted);margin-top:10px}.footer nav{display:flex;justify-content:flex-end;align-items:flex-start;gap:22px;font-size:12px;padding-top:12px}.footer nav a:hover{color:var(--purple)}.disclaimer{grid-column:1/-1;font-size:11px;line-height:1.8;color:var(--muted)}
dialog{border:1px solid var(--line);border-radius:25px;width:min(480px,calc(100% - 32px));max-height:90dvh;padding:40px;background:white;color:var(--ink);box-shadow:0 25px 90px #17171b30;overflow:auto}dialog::backdrop{background:#17171b8c}dialog h2{font-size:26px;margin-bottom:20px}dialog p:not(.kicker){margin-bottom:20px}dialog form{margin-top:25px}dialog form .button{width:100%}.dialog-close{border:0;background:var(--paper);color:var(--ink);width:40px;height:40px;border-radius:50%;font-size:25px;line-height:1;position:absolute;right:14px;top:14px}.image-dialog{padding:16px;width:min(600px,calc(100% - 24px));border-radius:20px}.image-dialog-head{position:sticky;top:-16px;background:white;padding:10px 45px 14px 0;z-index:1;min-height:50px}.image-dialog-head h2{font-size:16px;margin:0}.image-dialog-head .dialog-close{right:0;top:0}.image-dialog>img{width:100%;height:auto}body:has(dialog[open]){overflow:hidden}
.subpage{max-width:880px;margin:55px auto 100px}.subpage h1{font-size:44px;letter-spacing:-.04em;line-height:1.4;margin-bottom:28px}.notice{padding:28px;border:1px solid var(--line);border-radius:18px;background:white;margin:30px 0}.notice h2{font-size:23px;margin-bottom:14px}.notice p{font-size:14px;color:var(--muted);margin-bottom:12px}.subpage .button{margin-top:12px}.legal{max-width:840px;margin:60px auto 90px;padding:40px;background:white;border:1px solid var(--line);border-radius:24px}.legal h1{font-size:38px;line-height:1.4;margin:22px 0}.legal h2{font-size:21px;line-height:1.6;margin:36px 0 14px;scroll-margin-top:24px}.legal p{font-size:15px;line-height:2;white-space:pre-line;margin-bottom:18px}.legal .legal-date{font-size:12px;color:var(--muted)}.legal-nav{border-block:1px solid var(--line);padding:20px 0;margin:28px 0}.legal-nav ol{columns:2;padding-left:24px;margin:10px 0;font-size:13px;line-height:2.2}.legal-nav li{break-inside:avoid}.legal a{color:var(--purple)}
@media(min-width:1600px){.hero{padding-block:90px}.hero-art{height:740px}.hero-phone{width:330px}}
@media(max-width:1000px){.wrap{width:calc(100% - 48px)}.hero{gap:20px;min-height:740px;padding-top:35px}.hero h1{font-size:56px}.hero-art{height:650px}.hero-phone{width:270px}.margin-note{right:0;bottom:40px;padding:14px 18px}.annotation{left:0;top:10px}.hero-notes{gap:10px;font-size:11px}.hero-notes span+span:before{margin-right:10px}.story{gap:36px}.story-media{height:645px}.membership-grid{gap:12px}.plan{padding:30px 22px}.header nav{gap:22px}.gallery{padding-inline:24px;scroll-padding-inline:24px}.ipad-section{padding:45px 36px 0}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{height:80px;position:relative;z-index:5}.brand{font-size:18px}.brand img{width:36px;height:36px;border-radius:10px}.menu{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:white;border-radius:99px;padding:9px 15px;font-size:13px;min-height:44px}.header nav{display:none;position:absolute;top:70px;left:0;right:0;background:white;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 15px 40px #17171b12}.header nav.open{display:flex;flex-direction:column;align-items:stretch;gap:4px}.header nav a{padding:12px 15px}.header nav .nav-cta{margin-top:6px;text-align:center}.hero{grid-template-columns:1fr;padding-top:38px;padding-bottom:40px;gap:32px;text-align:center}.hero h1{font-size:clamp(45px,10vw,64px);line-height:1.4}.kicker{font-size:11px;margin-bottom:18px}.lead{font-size:15px;max-width:430px;margin:auto}.actions{justify-content:center;gap:22px;margin-top:26px}.button{font-size:14px;padding:14px 20px}.hero-notes{justify-content:center;margin-top:30px}.hero-art{height:660px;max-width:440px;width:100%;margin:auto}.hero-phone{width:270px}.hero-art:before{inset:0}.annotation{top:5px;left:0;font-size:11px}.margin-note{bottom:34px;right:0;text-align:left}.margin-note span{font-size:23px}.subject-band>.wrap{flex-direction:column;gap:15px;padding-block:22px}.subject-band .wrap>div{gap:28px;font-size:14px}.subject-band p{font-size:12px}.section{padding-block:70px}h2{font-size:32px}.section-heading{margin-bottom:32px}.section-heading>p:last-child:not(.kicker){font-size:14px}.study-grid{grid-template-columns:1fr;gap:16px}.study-grid article{padding:28px}.feature-label{margin-bottom:17px}h3{font-size:22px}.study-grid p{font-size:14px}.story{grid-template-columns:1fr;gap:32px;margin-bottom:64px}.story .story-copy{grid-column:1;grid-row:1}.story .story-media{grid-column:1;grid-row:2}.story-media{height:625px;padding-top:24px;border-radius:24px}.story-media .phone{width:270px}.story-copy>p:not(.kicker){font-size:14px;margin-top:18px}.review-section{padding:60px 0}.review-grid{grid-template-columns:1fr;gap:26px}.review-grid article{display:grid;grid-template-columns:48px 1fr;column-gap:18px;align-items:start}.review-grid h3{margin:4px 0 13px}.review-grid .symbol{grid-row:1/3}.review-grid p{grid-column:2}.gallery-controls{gap:7px}.gallery-controls button{width:44px;height:44px}.gallery{padding:30px 20px 25px;scroll-padding-inline:20px;gap:20px}.gallery figure{flex-basis:235px}.ipad-section{padding:38px 16px 0;border-radius:22px}.ipad-heading{margin-bottom:28px}.ipad-heading p:last-child{font-size:13px}.tablet{border-width:5px;border-radius:16px 16px 0 0;max-height:none}.membership-grid{grid-template-columns:1fr;gap:24px}.plan{padding:28px}.plan h3{font-size:27px}.plan ul{font-size:14px}.download{padding:40px 22px;border-radius:24px}.download-actions{flex-direction:column;align-items:center}.download-actions>.button{width:100%;max-width:340px}.download>p:not(.kicker){font-size:14px}.faq{grid-template-columns:1fr;gap:28px}.footer{grid-template-columns:1fr;gap:18px}.footer nav{justify-content:flex-start;flex-wrap:wrap;padding-top:0}.disclaimer{font-size:10px}.subpage{margin-top:35px}.subpage h1{font-size:33px}.legal{padding:24px;margin-block:30px}.legal h1{font-size:30px}.legal-nav ol{columns:1}dialog{padding:35px 24px 24px}dialog h2{font-size:23px}.image-dialog{padding:12px}.image-dialog-head{top:-12px}}
@media(max-width:360px){.wrap{width:calc(100% - 28px)}.hero h1{font-size:42px}.hero-art{height:640px}.hero-phone{width:254px}.margin-note{right:-2px}.hero-notes{gap:7px}.hero-notes span+span:before{margin-right:7px}.actions{gap:14px}.gallery-heading{gap:12px}h2{font-size:29px}.gallery-controls button{width:44px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.button:hover,.screenshot-button:hover{transform:none}}
@media print{.header,.footer,.legal-nav,.skip,.button{display:none}.legal{border:0;margin:0;padding:0;max-width:none}.legal h2{break-after:avoid}body{background:white}}
/* Dual theme: preserve the original light palette and default to the dark site. */
:root{color-scheme:light}
.header{gap:20px}
.header>.brand{margin-right:auto}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:99px;background:var(--surface);color:var(--ink);font-size:12px;line-height:1.5}
.theme-symbol{font-size:19px;line-height:1}
:root[data-theme="dark"]{color-scheme:dark;--paper:#09080d;--surface:#141219;--ink:#f5f3fa;--muted:#b0aabf;--line:#302b3b;--purple:#b18aff;--lavender:#201333}
/* Fine monochrome grain belongs to the background, never over text or screenshots. */
[data-theme="dark"] body{background-color:var(--paper);background-image:url("assets/frosted-grain.svg"),radial-gradient(ellipse at 25% 0%,rgba(255,255,255,.035),transparent 65%),radial-gradient(ellipse at 85% 5%,#21113b40,transparent 35%);background-size:240px 240px,100% 1100px,100% 1800px;background-repeat:repeat,no-repeat,no-repeat}
[data-theme="dark"] .nav-cta{background:#f5f3fa;color:#17171b}
[data-theme="dark"] .primary{background:#7028f5;color:#fff}
[data-theme="dark"] .primary:hover{background:#8140fb}
[data-theme="dark"] :is(.subject-band,.study-grid article,.review-section,.plan,.notice,.legal,.secondary,.gallery-controls button,dialog,.image-dialog-head,.menu,.skip){background:var(--surface);color:var(--ink)}
[data-theme="dark"] .margin-note{background:#19141feF;color:var(--ink);box-shadow:0 15px 45px #0005}
[data-theme="dark"] .annotation{background:#17111e}
[data-theme="dark"] .phone,[data-theme="dark"] .screenshot-button{border-color:#28252e;box-shadow:0 24px 65px #0007}
[data-theme="dark"] .hero-art:before{background:radial-gradient(ellipse,#641ce955,transparent 68%)}
[data-theme="dark"] .lavender{background:linear-gradient(145deg,#6621dc,#2321a0)}
[data-theme="dark"] .mist{background:linear-gradient(145deg,#272037,#12101a)}
[data-theme="dark"] .tablet{border-color:#292430}
[data-theme="dark"] .ipad-section{background:linear-gradient(140deg,#241439,#13101d)}
[data-theme="dark"] .featured{background:#211332;border-color:#8e50fa}
[data-theme="dark"] .plan-mark{background:#7028f5;color:#fff}
[data-theme="dark"] .download{background:linear-gradient(125deg,#5720d9,#7e32f2);color:#fff}
[data-theme="dark"] .download :is(.kicker,p:not(.kicker)){color:#eee5ff}
[data-theme="dark"] .download .primary{background:#fff;color:#4d16b6}
[data-theme="dark"] .download .secondary{background:#271343;color:#fff;border-color:#bda0f4}
[data-theme="dark"] .download .primary:hover{background:#eee5ff}
[data-theme="dark"] dialog::backdrop{background:#000a}
[data-theme="dark"] .gallery{scrollbar-color:#5f467f transparent}
@media(max-width:1000px){.header{gap:14px}.header nav{gap:16px}}
@media(max-width:760px){.menu{order:3}.theme-toggle{padding:8px 11px}.header nav.open{background:var(--surface)}.header{gap:10px}}
@media(max-width:360px){.theme-label{display:none}.theme-toggle{width:44px;padding:8px}.header{gap:8px}}
@media print{.theme-toggle{display:none}:root[data-theme="dark"]{--paper:#fff;--surface:#fff;--ink:#17171b;--muted:#646570;--line:#e4e4eb;--purple:#5b18ed}html[data-theme="dark"] body{background:#fff}}