:root {
  --yellow: #fff15a;
  --ink: #252622;
  --paper: #fbfbf6;
  --muted: #5c5d55;
  --line: #b8b9af;
  --vac-chat-bottom: 0px;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}
* { box-sizing: border-box; }
body { margin: 0; }
img { display: block; max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-underline-offset: .25em; }
button, a { touch-action: manipulation; }
a:focus-visible, button:focus-visible { outline: 3px solid #5541ad; outline-offset: 6px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 900; letter-spacing: -.045em; }
p { line-height: 1.85; }
.shell { width: min(1320px, calc(100% - 112px)); margin-inline: auto; }
.skip { position: fixed; top: -100px; left: 24px; z-index: 50; background: var(--ink); color: white; padding: 14px; }
.skip:focus { top: 12px; }
.site-header { background: var(--paper); position: sticky; top: 0; z-index: 20; border-bottom: 1px solid transparent; }
.header-inner { min-height: 108px; display: flex; align-items: center; gap: 44px; }
.brand { flex-shrink: 0; display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand-badge { flex-shrink: 0; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%; background: #fff; border: 1px solid #e9e9df; }
.brand-badge img { width: 36px; height: 36px; object-fit: contain; }
.brand-label { font-size: 32px; font-weight: 400; line-height: 1.2; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 38px; flex: 1; }
.site-nav a { font-size: 20px; font-weight: 600; text-decoration: none; padding: 12px 0; }
.site-nav a:hover, .site-nav a[aria-current] { text-decoration: underline; text-decoration-thickness: 2px; }
.site-nav .account { margin-left: auto; font-weight: 400; }
.menu-toggle { display: none; border: 1px solid var(--ink); padding: 10px 16px; color: var(--ink); background: none; }
.button { display: inline-flex; justify-content: space-between; align-items: center; gap: 32px; min-height: 72px; padding: 18px 34px; background: var(--ink); color: var(--yellow); font-size: 23px; font-weight: 700; text-decoration: none; border: 2px solid var(--ink); cursor: pointer; transition: background .18s, color .18s, transform .18s; }
.button:hover { background: #41423b; transform: translateY(-2px); }
.button[aria-busy="true"] { cursor: progress; opacity: .75; }
.text-link { display: inline-block; font-size: 18px; line-height: 1.7; font-weight: 600; }
.text-link:hover { text-decoration-thickness: 2px; }
.arrow { width: 26px; height: 26px; flex-shrink: 0; }
.hero { background: var(--yellow); position: relative; padding: 76px 0 132px; }
.hero::after { content: ""; position: absolute; left: 0; bottom: -1px; width: 100%; height: 118px; background: var(--paper); clip-path: polygon(0 100%,100% 0,100% 100%); }
.hero-mark { position: absolute; width: 370px; height: 370px; object-fit: contain; right: 0; top: 12px; opacity: .32; pointer-events: none; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.5fr 1fr; align-items: center; gap: 48px; z-index: 1; }
.product-name { margin-bottom: 20px; font-size: 24px; font-weight: 600; }
.hero h1 { font-size: clamp(56px,7.65vw,110px); line-height: 1.15; margin-bottom: 26px; }
.hero-description { font-size: 24px; line-height: 1.65; margin-bottom: 0; }
.hero-action { justify-self: end; padding-top: 40px; display: grid; justify-items: start; gap: 24px; }
.hero-action .button { min-width: 360px; min-height: 94px; font-size: 28px; }
.client-section { position: relative; padding: 0 0 48px; }
.client-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.client-figure { margin: -92px 0 0; position: relative; background: url('paper.webp') center / 125% auto no-repeat; }
.client-figure img { width: min(100%, 480px); margin-inline: auto; }
.client-copy h2 { font-size: clamp(38px,5vw,72px); line-height: 1.2; margin: 0 0 54px; }
.client-notes { margin: 0; }
.client-notes dt { font-size: 32px; font-weight: 800; margin-bottom: 10px; position: relative; }
.client-notes dd { margin: 0 0 48px; font-size: 20px; line-height: 1.8; color: var(--muted); }
.client-notes dt::before { content: ""; position: absolute; width: 70px; height: 2px; background: #b5a900; left: -90px; top: .7em; }
.guide-note { border-top: 1px solid var(--line); padding-top: 24px; }
.guide-note p { margin: 8px 0 0; font-size: 19px; color: var(--muted); }
.decide { border-top: 1px solid var(--line); padding-block: 56px 64px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.decide h2 { font-size: clamp(36px,4.4vw,62px); line-height: 1.25; }
mark { background: var(--yellow); color: inherit; padding: 0 .1em; }
.reading-row { padding-block: 8px 30px; }
.reading-row + .reading-row { border-top: 1px solid var(--line); padding-top: 30px; padding-bottom: 0; }
.reading-row h3 { font-size: 30px; margin-bottom: 12px; }
.reading-row h3 a { text-decoration: none; }
.reading-row h3 a:hover { text-decoration: underline; }
.reading-row p { font-size: 22px; color: var(--muted); margin-bottom: 0; }
.closing { background: var(--yellow); padding-block: 36px; }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.closing h2 { font-size: 45px; margin: 0; }
.closing .button { min-width: 350px; }
.site-footer { padding-block: 36px; }
.footer-inner { display: flex; gap: 48px; align-items: center; }
.footer-inner .brand-badge { width: 48px; height: 48px; }
.footer-inner .brand-badge img { width: 32px; height: 32px; }
.footer-inner .brand-label { font-size: 26px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; }
.footer-nav a { font-size: 15px; text-decoration: none; padding: 10px 0; }
.footer-nav a:hover { text-decoration: underline; }
.footer-note { font-size: 13px; color: var(--muted); margin: 20px 0 0; }
.page-hero { background: var(--yellow); padding: 52px 0 64px; }
.breadcrumb { font-size: 15px; margin-bottom: 28px; }
.page-hero h1 { font-size: clamp(40px,5vw,70px); line-height: 1.2; margin-bottom: 20px; }
.page-hero p:last-child { font-size: 21px; max-width: 42em; margin-bottom: 0; }
.page-body { padding-block: 64px 80px; }
.download-layout { display: grid; grid-template-columns: 1.1fr .9fr; align-items: start; gap: 100px; }
.download-main h2 { font-size: 42px; margin-bottom: 22px; }
.download-main p { font-size: 19px; }
.download-main .button { margin: 12px 0 24px; min-width: 300px; }
.requirements { margin: 28px 0; border-block: 1px solid var(--line); }
.requirements > div { display: grid; grid-template-columns: 100px 1fr; gap: 18px; padding-block: 18px; }
.requirements > div + div { border-top: 1px solid var(--line); }
.requirements dt { font-weight: 700; }
.requirements dd { margin: 0; line-height: 1.7; color: var(--muted); }
.aside-help { border-left: 2px solid var(--yellow); padding-left: 36px; }
.aside-help h2 { font-size: 28px; }
.aside-help p { color: var(--muted); }
.aside-help section + section { margin-top: 44px; }
.notice { padding: 22px 26px; background: #efefe6; line-height: 1.8; border-left: 4px solid #8b8100; }
.help-list { max-width: 1050px; }
.help-item { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; padding: 36px 0; border-bottom: 1px solid var(--line); }
.help-item:first-child { padding-top: 0; }
.help-item h2 { font-size: 32px; margin-bottom: 16px; }
.help-item p { font-size: 19px; color: var(--muted); }
.article-layout { display: grid; grid-template-columns: 220px minmax(0,800px); gap: 90px; align-items: start; }
.article-toc { position: sticky; top: 144px; border-left: 3px solid var(--yellow); padding-left: 22px; }
.article-toc p { font-weight: 700; margin-bottom: 16px; }
.article-toc a { display: block; padding: 8px 0; text-decoration: none; color: var(--muted); }
.article-toc a:hover { color: var(--ink); text-decoration: underline; }
.article-body { min-width: 0; }
.article-body section { margin-bottom: 56px; }
.article-body h2 { font-size: 32px; margin-bottom: 22px; }
.article-body p, .article-body li { font-size: 18px; line-height: 1.95; }
.article-body ul, .article-body ol { padding-left: 1.4em; }
.article-body li { padding-left: .3em; margin-bottom: 10px; }
.article-body figure { margin: 28px 0; background: #f0f0e6; padding: 24px; }
.article-body figure img { width: 260px; margin: auto; }
.article-body figcaption { font-size: 14px; line-height: 1.7; text-align: center; color: var(--muted); }
.next-reading { border-top: 1px solid var(--line); padding-top: 28px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.legal-body { max-width: 850px; margin-inline: auto; }
.legal-body h2 { font-size: 30px; }
.legal-body p { font-size: 18px; }
.legal-body section { margin-top: 42px; }
.inline-chat { display: none; background: var(--ink); color: var(--yellow); padding: 12px 20px; border: 0; cursor: pointer; font-weight: 600; }
:root[data-vac-chat="ready"] .inline-chat { display: inline-block; }
:root[data-vac-chat="ready"] .chat-fallback { display: none; }
.vac-float { position: fixed; right: 20px; bottom: calc(20px + var(--vac-chat-bottom)); z-index: 2147482999; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.vac-chat { display: none; position: relative; width: 60px; height: 60px; border: 2px solid var(--ink); border-radius: 50%; background: var(--yellow); color: var(--ink); cursor: pointer; box-shadow: 0 4px 18px #25262222; }
:root[data-vac-chat="ready"] .vac-chat { display: grid; place-items: center; }
.vac-chat svg { width: 26px; height: 26px; }
.vac-chat-unread { position: absolute; top: -4px; right: -4px; min-width: 20px; padding: 2px 5px; border-radius: 12px; background: #ad2034; color: white; font-size: 12px; }
.vac-chat-unread:empty { display: none; }
@media (min-width: 901px) and (prefers-reduced-motion: no-preference) {
  .hero-copy { animation: enter .55s ease-out both; }
  .hero-action { animation: enter .55s .08s ease-out both; }
  @keyframes enter { from { transform: translateY(12px); } to { transform: translateY(0); } }
}
@media (max-width: 1100px) {
  .shell { width: calc(100% - 64px); }
  .header-inner { gap: 36px; min-height: 92px; }
  .brand { gap: 10px; }
  .brand-badge { width: 48px; height: 48px; }
  .brand-badge img { width: 32px; height: 32px; }
  .brand-label { font-size: 26px; }
  .site-nav { gap: 24px; }
  .site-nav a { font-size: 15px; }
  .hero-inner { gap: 24px; }
  .hero-action .button { min-width: 260px; min-height: 72px; font-size: 20px; }
  .button { font-size: 20px; padding-inline: 24px; }
  .hero-description { font-size: 18px; }
  .client-layout, .decide { gap: 50px; }
  .client-notes dt::before { width: 40px; left: -54px; }
  .article-layout { grid-template-columns: 180px minmax(0,1fr); gap: 48px; }
  .closing h2 { font-size: 35px; }
  .download-layout { gap: 48px; }
}
@media (max-width: 900px) {
  :root { scroll-padding-top: 88px; }
  .header-inner { min-height: 80px; position: relative; flex-wrap: wrap; gap: 0; }
  .site-nav { width: 100%; flex: auto; gap: 8px 24px; flex-wrap: wrap; padding-bottom: 16px; }
  .site-nav .account { margin-left: 0; }
  .js .menu-toggle { display: block; margin-left: auto; }
  .js .site-nav { display: none; position: absolute; left: -32px; right: -32px; top: 100%; width: auto; background: var(--paper); border-block: 1px solid var(--line); padding: 20px 32px 28px; }
  .js .site-nav.is-open { display: grid; gap: 0; }
  .js .site-nav a { font-size: 18px; padding: 13px 0; }
  .hero { padding-block: 48px 110px; }
  .hero h1 { font-size: clamp(48px,7vw,66px); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-action { justify-self: start; padding-top: 8px; display: flex; align-items: center; gap: 24px; }
  .hero-mark { width: 300px; top: 80px; opacity: .06; }
  .client-copy h2 { font-size: 38px; margin-bottom: 36px; }
  .client-notes dt { font-size: 25px; }
  .client-notes dd { font-size: 17px; margin-bottom: 28px; }
  .client-figure { margin-top: -48px; }
  .client-layout { gap: 35px; }
  .client-notes dt::before { display: none; }
  .decide { gap: 40px; }
  .closing-inner { flex-wrap: wrap; }
  .footer-inner { align-items: start; flex-wrap: wrap; gap: 24px; }
  .article-layout { grid-template-columns: 1fr; gap: 36px; }
  .article-toc { position: static; display: flex; flex-wrap: wrap; gap: 4px 24px; }
  .article-toc p { width: 100%; margin-bottom: 0; }
}
@media (max-width: 600px) {
  .shell { width: calc(100% - 40px); }
  .header-inner { min-height: 76px; }
  .brand-badge { width: 44px; height: 44px; }
  .brand-badge img { width: 30px; height: 30px; }
  .brand-label { font-size: 24px; }
  .js .site-nav { left: -20px; right: -20px; padding-inline: 20px; }
  .hero { padding: 38px 0 84px; }
  .hero::after { height: 45px; }
  .product-name { font-size: 18px; margin-bottom: 18px; }
  .hero h1 { font-size: clamp(40px,10.9vw,62px); line-height: 1.17; margin-bottom: 22px; }
  .hero-description { font-size: 16px; line-height: 1.8; }
  .hero-description br { display: none; }
  .hero-action { display: grid; gap: 18px; width: 100%; }
  .hero-action .button { width: 100%; min-width: 0; min-height: 62px; font-size: 18px; }
  .button { font-size: 18px; min-height: 62px; padding: 16px 22px; gap: 20px; }
  .text-link { font-size: 16px; }
  .hero-mark { width: 220px; top: 70px; }
  .client-section { padding: 8px 0 40px; }
  .client-layout { grid-template-columns: 1fr; gap: 0; }
  .client-figure { margin: -30px 0 0; }
  .client-figure img { width: 290px; }
  .client-copy h2 { font-size: 38px; margin-bottom: 28px; }
  .client-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .client-notes dt { font-size: 23px; margin-bottom: 8px; }
  .client-notes dd { font-size: 16px; margin-bottom: 24px; }
  .guide-note { padding-top: 18px; }
  .guide-note p { font-size: 16px; }
  .decide { grid-template-columns: 1fr; gap: 20px; padding-block: 36px 40px; }
  .decide h2 { font-size: 36px; margin-bottom: 12px; }
  .reading-row h3 { font-size: 25px; }
  .reading-row p { font-size: 16px; }
  .closing { padding-block: 30px; }
  .closing-inner { display: grid; gap: 22px; }
  .closing h2 { font-size: 36px; }
  .closing .button { justify-content: space-between; min-width: 0; }
  .site-footer { padding-block: 32px 106px; }
  .footer-inner { display: grid; gap: 24px; }
  .footer-nav { gap: 4px 20px; }
  .footer-inner .brand-label { font-size: 24px; }
  .page-hero { padding: 30px 0 38px; }
  .breadcrumb { margin-bottom: 22px; font-size: 14px; }
  .page-hero h1 { font-size: 38px; }
  .page-hero p:last-child { font-size: 17px; }
  .page-body { padding-block: 36px 48px; }
  .download-layout { grid-template-columns: 1fr; gap: 40px; }
  .download-main h2 { font-size: 34px; }
  .download-main p { font-size: 17px; }
  .download-main .button { width: 100%; min-width: 0; }
  .requirements > div { grid-template-columns: 76px 1fr; font-size: 15px; }
  .aside-help { border-left: 0; border-top: 2px solid var(--yellow); padding: 28px 0 0; }
  .notice { padding: 18px; font-size: 16px; }
  .help-item { grid-template-columns: 1fr; gap: 8px; padding-block: 28px; }
  .help-item h2 { font-size: 27px; }
  .help-item p { font-size: 17px; }
  .article-toc { gap: 0 20px; font-size: 15px; }
  .article-body h2 { font-size: 28px; }
  .article-body p, .article-body li { font-size: 17px; }
  .article-body section { margin-bottom: 40px; }
  .article-body figure { padding: 16px; }
  .next-reading { display: grid; gap: 20px; }
  .legal-body p { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}