:root{--ink:#191626;--muted:#706a83;--accent:#4325d3;--accent-dark:#3217a8;--tint:#f0edff;--line:#e3dff1;--header:88px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;font-synthesis:none;line-height:1.8}
*{box-sizing:border-box}body,h1,h2,h3,p,figure,dl,dd{margin:0}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button{font:inherit;cursor:pointer}button,a,summary{touch-action:manipulation}p,dd{color:var(--muted)}p+p{margin-top:16px}h1,h2,h3{line-height:1.3;letter-spacing:-.035em}h1{font-size:clamp(40px,4.4vw,64px);font-weight:750}h2{font-size:clamp(32px,3.4vw,48px);font-weight:700}h3{font-size:21px;font-weight:650}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #9074e5;outline-offset:5px}[hidden]{display:none!important}[id]{scroll-margin-top:calc(var(--header) + 32px)}::selection{background:#e3d9ff}.shell{width:min(1200px,calc(100% - 96px));margin-inline:auto}.split{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link{position:fixed;top:-100px;left:16px;z-index:1001;background:white;padding:12px 24px}.skip-link:focus{top:12px}.text-link{display:inline-flex;align-items:center;min-height:44px;font-size:16px;font-weight:600;color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:6px}.text-link:hover{color:var(--accent-dark);text-decoration-thickness:2px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:56px;padding:13px 28px;background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:6px;font-size:16px;font-weight:600;line-height:1.6}.button:hover{background:var(--accent-dark)}.button[aria-busy=true]{cursor:progress;box-shadow:0 0 0 4px #4325d320}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:24px 32px;margin-top:32px}.section-description{font-size:18px;margin-top:32px;max-width:36em}.section-link{margin-top:24px}.small,.table-note{font-size:14px;color:var(--muted)}.lead{font-size:20px;margin-top:24px}.notice{background:#f3f0fb;border-left:3px solid #b8a9e6;padding:18px 24px;margin-block:24px}
/* Transparent over the photograph at the top; solid only after leaving the hero. */
.site-header{position:relative;z-index:100;background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:var(--header);display:flex;align-items:center;gap:42px}.brand{display:inline-flex;align-items:center;flex-shrink:0;min-height:44px}.brand img{width:138px;height:auto}.site-nav{display:flex;align-items:center;gap:30px;font-size:15px}.site-nav a{position:relative;padding-block:12px;white-space:nowrap}.site-nav a:hover,.site-nav a[aria-current]{color:var(--accent)}.site-nav a[aria-current]::after{content:"";position:absolute;bottom:5px;height:2px;left:0;right:0;background:var(--accent)}.header-actions{margin-left:auto;display:flex;align-items:center;gap:24px;font-size:14px;white-space:nowrap}.login-link{display:inline-flex;min-height:44px;align-items:center;color:var(--accent)}.nav-download{border:1px solid var(--accent);border-radius:24px;padding:7px 20px;color:var(--accent)}.nav-download:hover{background:#eee9ff}.menu-toggle{display:none;min-height:44px;padding:7px 14px;background:#ffffffc9;border:1px solid #cfc5e9;border-radius:6px;color:var(--ink)}.home .site-header{position:absolute;inset:0 0 auto;background:transparent;border-color:transparent}.js .site-header{position:sticky;top:0}.js .home .site-header{position:fixed}.js .home .site-header.is-solid{background:#fffffff7;border-color:var(--line);box-shadow:0 2px 16px #2c155009}
.hero{position:relative;isolation:isolate;overflow:hidden;background:#f0edf7;border-radius:0 0 48% 9% / 0 0 4% 3%}.hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:52% center;z-index:-1}.hero-inner{min-height:800px;display:flex;align-items:center;padding-top:80px;padding-bottom:40px}.hero-copy{width:53%;max-width:640px}.product-name{font-size:21px;margin-top:24px;color:#5e5674}.hero-description{font-size:18px;margin-top:24px}.download-meta{font-size:12px;margin-top:20px;color:#69617b}
.start-section{padding-top:104px}.start-layout{align-items:start;min-height:365px}.steps{list-style:none;margin:0;padding:0 0 0 56px;border-left:1px solid var(--line);counter-reset:steps}.steps li{position:relative;counter-increment:steps;padding-left:78px}.steps li+li{margin-top:34px}.steps li::before{content:counter(steps);position:absolute;left:0;top:0;display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:#eee8ff;font-size:23px;color:#33215f}.steps h3{font-size:20px;margin-bottom:8px}.steps p{font-size:16px}.product-section{background:url('../images/flow-surface.webp') center center / 100% 100% no-repeat;position:relative;margin-top:-26px}.product-layout{min-height:750px;padding-block:0 70px}.client-visual{display:flex;justify-content:center;align-self:start}.client-visual img{width:370px;height:auto}.client-copy h2{font-size:40px}.client-copy .section-description{font-size:18px}
.scenarios-section{position:relative;isolation:isolate;min-height:800px;display:flex;align-items:center;padding-block:100px;overflow:hidden}.scenario-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;z-index:-1}.scenario-copy{max-width:460px}.scenario-copy h2{margin-bottom:48px;white-space:nowrap}.scenario-text+.scenario-text{margin-top:34px}.scenario-text p{font-size:16px;margin-top:10px;max-width:26em}.scenario-text .text-link{font-size:14px;margin-top:8px}.membership-section{padding-block:110px 100px}.membership-section .split{align-items:start}.comparison{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;text-align:left}.comparison th,.comparison td{padding:22px 12px;border-bottom:1px solid var(--line);font-weight:400;font-size:18px}.comparison thead th{color:var(--accent);font-size:28px;font-weight:650}.comparison tbody th{color:var(--muted);font-size:16px}.comparison th:first-child{padding-left:0}.comparison th:last-child,.comparison td:last-child{padding-right:0}.comparison caption{text-align:left;font-size:16px;padding-block:10px 20px;color:var(--muted)}.table-note{margin-top:24px}.home-help{background:url('../images/flow-surface.webp') center top / 100% 150% no-repeat;padding-block:150px 110px}.home-help .split{align-items:center}.reading-link{display:block;padding:26px 0;border-bottom:1px solid var(--line)}.reading-link:first-child{padding-top:0}.reading-link span{font-size:21px;font-weight:650;line-height:1.5}.reading-link p{font-size:15px;margin-top:8px;max-width:36em}.reading-link:hover span{color:var(--accent);text-decoration:underline;text-underline-offset:5px}
.site-footer{background:#fff;padding:54px 0 32px}.footer-main{display:grid;grid-template-columns:170px 1fr 1.3fr;align-items:start;gap:48px}.footer-main nav{display:flex;flex-wrap:wrap;gap:8px 28px}.footer-main nav a{font-size:14px;min-height:44px;display:inline-flex;align-items:center;color:#655b79;text-decoration:none;font-weight:400}.footer-main nav a:hover{color:var(--accent);text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:24px;margin-top:34px;font-size:12px;color:var(--muted)}.footer-bottom a{padding-right:72px}
html:not(.js) .home .site-header{position:relative;background:#f0edf7}html:not(.js) .home .hero-inner{padding-top:64px}
/* Product and reading pages use the same type, margins and navigation. */
.page-intro{padding-top:64px;padding-bottom:72px}.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;color:var(--muted);margin-bottom:40px}.breadcrumbs a{padding-block:6px}.breadcrumbs a:hover{color:var(--accent);text-decoration:underline}.page-intro h1{font-size:clamp(36px,4vw,56px);max-width:18em}.page-intro>p{font-size:20px;margin-top:24px;max-width:38em}.download-layout{align-items:start;gap:120px;padding-bottom:80px}.download-visual{background:url('../images/flow-surface.webp') center / cover;display:flex;justify-content:center;padding:30px}.download-visual img{width:280px}.download-content{padding-top:20px}.download-content h2{font-size:36px}.file-info{margin-top:32px}.file-info>div{display:flex;justify-content:space-between;gap:24px;padding:16px 0;border-bottom:1px solid var(--line)}.file-info dt{color:var(--muted)}.file-info dd{color:var(--ink)}.download-content .small{margin-top:24px}.download-content details{margin-top:30px}.related-section{padding-block:70px 100px;border-top:1px solid var(--line)}.related-section h2{font-size:34px}.guide-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:48px}.guide-columns .reading-link{padding-top:0}.plans-content{max-width:1000px;padding-bottom:110px}.plans-content>h2,.price-section h2{font-size:34px;margin-bottom:28px}.price-section{margin-top:88px}.prices td{font-size:32px;font-weight:650}.prices small{display:block;font-size:13px;font-weight:400}.plan-notes{margin-top:88px;align-items:start;gap:72px}.plan-notes h2{font-size:30px}.plan-notes p{margin-top:20px}.plan-notes .text-link{margin-top:16px}.help-directory{padding-bottom:90px}.help-directory>section{display:grid;grid-template-columns:1fr 1.8fr;gap:100px;padding-block:48px 70px;border-top:1px solid var(--line)}.help-directory h2{font-size:34px}.help-directory>section .reading-link:last-child{border:0}.contact-section{padding-top:56px;max-width:700px}.contact-section p{margin-top:24px}.contact-link{display:inline-block;color:var(--accent);font-size:20px;padding-block:12px;overflow-wrap:anywhere}.contact-link:hover{text-decoration:underline}
.article-intro{padding-bottom:64px}.article-layout{display:grid;grid-template-columns:240px minmax(0,760px);justify-content:space-between;gap:80px;padding-bottom:100px;align-items:start}.article-toc{position:sticky;top:calc(var(--header) + 32px);font-size:15px}.article-toc details{border:0}.article-toc summary{font-weight:650;padding-bottom:12px}.article-toc nav{display:flex;flex-direction:column;gap:6px;border-left:1px solid var(--line);padding-left:20px}.article-toc a{padding-block:7px;color:var(--muted);overflow-wrap:anywhere}.article-toc a:hover{color:var(--accent);text-decoration:underline}.article-body{font-size:17px;min-width:0}.article-body section+section{margin-top:64px}.article-body h2{font-size:30px;margin-bottom:24px}.article-body h3{margin-block:24px 12px}.article-body p,.article-body li{line-height:1.95}.article-body ol,.article-body ul{padding-left:24px;color:var(--muted);margin-block:20px}.article-body li+li{margin-top:14px}.article-body .text-link{margin-top:12px}.article-body .updated{font-size:14px;margin-bottom:32px}.legal-body>h2:not(:first-child){margin-top:48px}.legal-body a[href^="mailto:"]{color:var(--accent);text-decoration:underline}.next-reading{margin-top:72px;padding-top:36px;border-top:1px solid var(--line)}.next-reading h2{font-size:25px}.next-reading>.text-link{margin-right:24px}.mode-list>div{padding:24px 0;border-bottom:1px solid var(--line)}.mode-list dt{font-weight:650;margin-bottom:10px}.mode-list>div:first-child{padding-top:0}details{border-block:1px solid var(--line)}summary{cursor:pointer;padding-block:18px;font-weight:600;list-style-position:inside}summary:hover{color:var(--accent)}.answer{padding:0 0 24px}.answer p{font-size:16px}
.vac-float{position:fixed;right:20px;bottom:calc(20px + var(--vac-chat-bottom,0px));z-index:2147482999;display:flex;flex-direction:column;align-items:center;gap:16px}.vac-chat{position:relative;display:none;align-items:center;justify-content:center;width:56px;height:56px;border:0;border-radius:50%;background:var(--accent);color:#fff;box-shadow:0 5px 20px #38245526}.vac-chat:hover{background:var(--accent-dark)}:root[data-vac-chat=ready] .vac-chat{display:flex}.vac-chat svg{width:26px;height:26px}.vac-chat-unread{position:absolute;top:-2px;right:-2px;min-width:20px;height:20px;padding:0 6px;border-radius:10px;background:#bb2446;color:#fff;font:600 12px/20px system-ui;text-align:center}.vac-chat-unread:empty{display:none}
/* Match the approved broad editorial composition at desktop widths. */
.reading-link{position:relative;padding-right:36px}.reading-link::after{content:"›";position:absolute;right:4px;top:24px;font-size:28px;line-height:1;color:var(--accent)}.reading-link:first-child::after{top:0}
@media(min-width:1101px){.home h2{font-size:56px}.home .client-copy h2{font-size:44px}.home .section-description{font-size:20px}.home .start-section{padding-top:80px}.home .start-layout{min-height:355px}.home .steps h3{font-size:22px}.home .steps p{font-size:17px}.home .steps li+li{margin-top:40px}.home .product-section{margin-top:0}.home .product-layout{min-height:800px;padding-bottom:0}.home .client-visual img{width:460px}.home .scenario-copy{max-width:500px}.home .scenario-text h3{font-size:24px}.home .scenario-text p{font-size:18px}.home .comparison td{font-size:20px}.home .comparison thead th{font-size:30px}.home .reading-link span{font-size:24px}.home .reading-link p{font-size:17px}}
@media(min-width:1700px){.hero-inner{min-height:860px}}
@media(max-width:1100px){.shell{width:calc(100% - 64px)}.header-inner{gap:28px}.site-nav{gap:22px}.header-actions{gap:18px}.split{gap:64px}.hero-inner{min-height:740px}.hero-copy{width:57%}.hero h1{font-size:52px}.steps{padding-left:32px}.steps li{padding-left:68px}.steps p{font-size:15px}.client-copy h2{font-size:34px}.scenarios-section{min-height:720px}.scenario-copy{max-width:390px}.scenario-copy h2{font-size:38px}.article-layout{grid-template-columns:200px minmax(0,1fr);gap:48px}.guide-columns{gap:28px}}
@media(max-width:980px){.header-inner{flex-wrap:wrap;gap:0 24px}.site-nav{order:3;flex-basis:100%;flex-wrap:wrap;padding-bottom:16px}.js .site-nav{display:none;position:absolute;top:100%;left:0;right:0;max-height:calc(100svh - 110px);overflow-y:auto;background:#fff;padding:18px 32px;border-bottom:1px solid var(--line);box-shadow:0 14px 24px #281b4214}.js .site-nav.is-open{display:flex;flex-direction:column;align-items:stretch;gap:2px}.site-nav a{padding-block:12px}.site-nav a[aria-current]::after{display:none}.menu-toggle:not([hidden]){display:block}.home .hero-copy{padding-top:40px}.hero h1{font-size:46px}.product-name{font-size:18px}.hero-description{font-size:16px}.start-layout{gap:40px}.steps li{padding-left:60px}.steps li::before{width:44px;height:44px;font-size:20px}.start-section{padding-top:80px}.start-layout{min-height:390px}.product-layout{min-height:680px;gap:48px}.client-copy .section-description{font-size:16px}.client-visual img{width:310px}.scenario-copy{max-width:350px}.scenario-copy h2{font-size:34px}.scenario-art{object-position:58% center}.membership-section{padding-block:88px}.home-help{padding-block:120px 90px}.footer-main{grid-template-columns:140px 1fr;gap:24px 40px}.footer-main nav:last-child{grid-column:2}.download-layout{gap:64px}.article-layout{grid-template-columns:170px minmax(0,1fr);gap:32px}}
@media(max-width:700px){:root{--header:72px}.shell{width:calc(100% - 40px)}h1{font-size:38px}h2{font-size:34px}h3{font-size:20px}.brand img{width:112px}.header-actions{gap:16px}.nav-download{display:none}.site-nav{gap:4px 20px;font-size:14px}.header-inner{gap:0 16px}.menu-toggle{font-size:14px;padding-inline:12px}.hero{border-radius:0 0 30% 5% / 0 0 2% 1%;background:#f0edf7}.hero-inner{min-height:770px;align-items:flex-start;padding-top:126px;padding-bottom:330px}.home .hero-copy{width:100%;max-width:none;padding-top:0}.hero h1{font-size:clamp(32px,8.5vw,44px);line-height:1.35}.product-name{font-size:16px;margin-top:22px}.hero-description{font-size:16px;margin-top:20px;max-width:22em}.hero-art{top:auto;bottom:0;height:370px;object-position:82% 50%;mask-image:linear-gradient(transparent,#000 25%);-webkit-mask-image:linear-gradient(transparent,#000 25%)}.hero .actions{gap:16px 24px;margin-top:24px}.button{min-height:52px;padding:12px 20px;font-size:15px}.text-link{font-size:15px}.download-meta{font-size:11px;margin-top:16px}.split{grid-template-columns:1fr;gap:40px}.section-description{font-size:16px;margin-top:24px}.start-section{padding-top:64px}.start-layout{min-height:0}.steps{border-left:0;padding-left:0}.steps li{padding-left:64px}.steps li+li{margin-top:28px}.steps h3{font-size:18px}.steps p{font-size:15px}.product-section{margin-top:38px;background-size:auto 100%;background-position:40% center}.product-layout{min-height:0;padding-block:28px 70px;gap:32px}.client-visual img{width:248px}.client-copy h2{font-size:30px}.client-copy .actions{margin-top:24px}.scenarios-section{display:block;min-height:840px;padding-top:56px;padding-bottom:340px}.scenario-copy{max-width:none}.scenario-copy h2{font-size:32px;white-space:normal;margin-bottom:30px}.scenario-text+.scenario-text{margin-top:24px}.scenario-text p{max-width:none;font-size:15px}.scenario-art{top:auto;bottom:0;height:340px;object-position:82% center;mask-image:linear-gradient(transparent,#000 22%);-webkit-mask-image:linear-gradient(transparent,#000 22%)}.membership-section{padding-block:64px 56px}.membership-section .split{gap:32px}.comparison th,.comparison td{font-size:16px;padding:18px 8px}.comparison thead th{font-size:24px}.comparison tbody th{font-size:14px}.table-note{font-size:12px;margin-top:18px}.home-help{padding-block:96px 70px;background-size:auto 160%;background-position:42% top}.home-help .split{gap:36px}.reading-link{padding-block:22px}.reading-link span{font-size:19px}.reading-link p{font-size:14px}.site-footer{padding-block:36px 28px}.footer-main{grid-template-columns:1fr;gap:20px}.footer-main nav:last-child{grid-column:auto}.footer-main nav{gap:4px 24px}.footer-main nav a{font-size:13px}.footer-bottom{flex-direction:column;gap:4px;margin-top:24px}.footer-bottom a{padding-right:0}.page-intro{padding-top:32px;padding-bottom:44px}.breadcrumbs{font-size:13px;margin-bottom:26px;gap:10px}.page-intro h1{font-size:34px}.page-intro>p{font-size:17px;margin-top:20px}.download-layout{display:flex;flex-direction:column;gap:40px;padding-bottom:48px}.download-content{order:-1;width:100%;padding:0}.download-content h2{font-size:28px}.download-content .lead{font-size:17px}.download-visual{width:100%;padding-block:30px}.download-visual img{width:230px}.file-info{margin-top:24px}.file-info>div{padding-block:12px}.related-section{padding-block:48px 64px}.related-section h2{font-size:28px}.guide-columns{grid-template-columns:1fr;gap:28px;margin-top:32px}.plans-content{padding-bottom:64px}.plans-content>h2,.price-section h2{font-size:28px}.price-section{margin-top:56px}.prices td{font-size:26px}.prices small{font-size:12px}.plan-notes{margin-top:56px;gap:40px}.plan-notes h2{font-size:28px}.help-directory{padding-bottom:64px}.help-directory>section{grid-template-columns:1fr;gap:28px;padding-block:32px 36px}.help-directory h2{font-size:28px}.contact-section{padding-top:32px}.contact-link{font-size:18px}.article-layout{grid-template-columns:1fr;gap:36px;padding-bottom:64px}.article-toc{position:static;border-block:1px solid var(--line)}.article-toc summary{padding-block:14px}.article-toc nav{padding-bottom:18px}.article-body{font-size:16px}.article-body h2{font-size:26px;margin-bottom:20px}.article-body section+section{margin-top:48px}.article-body ol,.article-body ul{padding-left:22px}.notice{padding:16px 18px}.next-reading{margin-top:48px}.vac-float{right:16px;bottom:calc(16px + var(--vac-chat-bottom,0px))}.vac-chat{width:52px;height:52px}}
@media(max-width:360px){.shell{width:calc(100% - 32px)}.header-actions{gap:10px}.brand img{width:100px}.hero-inner{padding-top:114px;min-height:760px}.hero h1{font-size:31px}.hero .actions{gap:12px 16px}.button{padding-inline:16px}.comparison th,.comparison td{padding-inline:5px}.comparison tbody th{font-size:13px}.comparison td{font-size:15px}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}.button,.text-link,.nav-download,.site-header{transition:background-color .18s ease,color .18s ease,box-shadow .18s ease}.hero-copy{animation:hero-enter .65s ease both}.hero-art{animation:photo-enter .9s ease both}.js .site-nav.is-open{animation:menu-enter .15s ease both}@keyframes hero-enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@keyframes photo-enter{from{opacity:.7}to{opacity:1}}@keyframes menu-enter{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}}