:root {
  --blue: #075bea;
  --blue-deep: #063a9b;
  --ink: #10213d;
  --muted: #62708a;
  --line: #d7e1ef;
  --surface: #f4f8fd;
  --radius: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
.nav {
  height: 72px;
  max-width: 1180px;
  margin: auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: baseline; gap: 16px; text-decoration: none; }
.brand-mark { color: var(--blue); font-size: 30px; font-weight: 900; letter-spacing: -2px; }
.brand-name { font-size: 18px; font-weight: 750; }
.nav-actions { display: flex; align-items: center; gap: 10px; flex: 1; margin-left: 44px; }
.nav-link { color: var(--muted); text-decoration: none; font-size: 17px; font-weight: 700; padding: 12px 15px; white-space: nowrap; }
.nav-actions > .nav-link:nth-child(3), .nav-actions > .account-email { margin-left: auto; }
.nav-register { padding: 8px 17px; color: #fff; background: var(--blue); border-radius: 8px; text-decoration: none; font-size: 14px; font-weight: 700; }
main { overflow: hidden; }
.hero {
  max-width: 1240px;
  min-height: 620px;
  margin: auto;
  padding: 88px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.eyebrow { margin: 0 0 14px; color: var(--blue); font-weight: 750; font-size: 14px; letter-spacing: .08em; }
h1 { margin: 0; font-size: clamp(42px, 5.2vw, 72px); line-height: 1.08; letter-spacing: -.055em; }
.summary { max-width: 620px; margin: 26px 0 0; color: var(--muted); font-size: 18px; }
.actions { margin-top: 34px; display: flex; flex-direction: column; align-items: flex-start; gap: 13px; }
.public-downloads { display: flex; flex-wrap: wrap; gap: 12px; }
.download {
  display: inline-flex;
  min-height: 52px;
  padding: 13px 24px;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--blue);
  border: 2px solid var(--blue);
  border-radius: 10px;
  font-weight: 750;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(7,91,234,.22);
  transition: transform .15s ease, background .15s ease;
}
.download:hover { background: var(--blue-deep); border-color: var(--blue-deep); }
.download:active { transform: translateY(1px); }
.download-secondary { color: var(--blue); background: #fff; box-shadow: none; }
.download-secondary:hover { color: #fff; }
.download:focus-visible, .nav-link:focus-visible { outline: 3px solid rgba(7,91,234,.28); outline-offset: 4px; }
.meta { color: var(--muted); font-size: 13px; }
.text-link { color: var(--blue); font-size: 14px; font-weight: 700; text-decoration: none; }
.product-panel { width: 100%; min-height: 500px; padding: 46px 44px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 30px 80px rgba(21,59,116,.14); transform: none; display: flex; flex-direction: column; justify-content: center; }
.panel-head { display: flex; gap: 22px; align-items: center; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.panel-head img { width: 82px; height: 82px; border-radius: 16px; object-fit: cover; }
.panel-head strong, .panel-head span { display: block; }
.panel-head strong { font-size: 24px; }
.panel-head span { color: var(--muted); font-size: 16px; }
dl { margin: 12px 0 0; }
dl div { display: grid; grid-template-columns: 82px 1fr; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
dl div:last-child { border: 0; }
dt { color: var(--blue); font-weight: 800; }
dd { margin: 0; }
.trust { max-width: 1180px; margin: 0 auto; padding: 22px 24px; display: grid; grid-template-columns: 120px 1fr auto; gap: 20px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 14px; }
.trust span { color: var(--muted); }
.trust .warning { color: #e40055; }
.features { max-width: 1180px; margin: 96px auto; padding: 0 24px; display: grid; grid-template-columns: repeat(3,1fr); gap: 48px; }
.features article { border-top: 2px solid var(--ink); padding-top: 22px; }
.features article span { color: var(--blue); font-weight: 800; }
.features h2 { margin: 28px 0 8px; font-size: 26px; }
.features p { margin: 0; color: var(--muted); }
.product-showcase { max-width: 1180px; margin: 0 auto 96px; padding: 0 24px; }
.section-heading { max-width: 720px; margin-bottom: 32px; }
.section-heading h2 { margin: 0; font-size: clamp(32px, 4vw, 46px); line-height: 1.15; letter-spacing: -.04em; }
.section-heading > p:last-child { margin: 12px 0 0; color: var(--muted); }
.showcase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.showcase-card { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 22px 54px rgba(21,59,116,.1); }
.showcase-card img { display: block; width: 100%; height: auto; aspect-ratio: 8 / 3; object-fit: contain; background: var(--surface); }
.showcase-card figcaption { padding: 22px 24px 24px; display: grid; gap: 4px; }
.showcase-card figcaption strong { font-size: 20px; }
.showcase-card figcaption span { color: var(--muted); font-size: 14px; }
.pricing-calculator { max-width: 1180px; margin: 0 auto 96px; padding: 0 24px; }
.pricing-heading { max-width: 780px; }
.pricing-screen { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #eaf6ff; box-shadow: 0 28px 72px rgba(21,59,116,.14); }
.pricing-screen img { display: block; width: 100%; height: auto; }
.pricing-guide { margin-top: 28px; display: grid; grid-template-columns: .82fr 1.18fr; gap: 54px; align-items: start; }
.pricing-capabilities { padding-top: 4px; }
.pricing-capabilities h3 { margin: 0; font-size: 28px; letter-spacing: -.025em; }
.pricing-capabilities > p { margin: 12px 0 0; color: var(--muted); }
.pricing-facts { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px 22px; }
.pricing-facts span { color: var(--muted); font-size: 13px; }
.pricing-facts strong { margin-right: 5px; color: var(--blue); font-size: 18px; }
.pricing-steps { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 30px; list-style: none; }
.pricing-steps li { min-height: 126px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.pricing-steps li:nth-last-child(-n+2) { border-bottom: 0; }
.pricing-steps b, .pricing-steps span { display: block; }
.pricing-steps b { margin-bottom: 7px; color: var(--ink); font-size: 17px; }
.pricing-steps span { color: var(--muted); font-size: 14px; }
.tutorial { max-width: 1180px; margin: 0 auto 96px; padding: 48px; border-radius: var(--radius); background: var(--surface); }
.tutorial-quality { display: flex; align-items: center; gap: 10px; margin: 22px 0 14px; color: var(--muted); font-size: 14px; }
.tutorial-quality button { border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; color: var(--ink); background: #fff; font: inherit; cursor: pointer; }
.tutorial-quality button.active { border-color: var(--blue); color: #fff; background: var(--blue); }
.tutorial video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; border-radius: 12px; background: #09152a; box-shadow: 0 26px 64px rgba(21,59,116,.16); cursor: pointer; }
.install { max-width: 1180px; margin: 0 auto 96px; padding: 54px; display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; background: var(--surface); border-radius: var(--radius); }
.install h2, .purchase h2 { margin: 0; font-size: 38px; letter-spacing: -.035em; }
.install ol { margin: 0; padding: 0; list-style: none; }
.install li { display: grid; grid-template-columns: 76px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.install li:first-child { padding-top: 0; }
.install li:last-child { border: 0; padding-bottom: 0; }
.install li b { color: var(--blue); }
.install li span { color: var(--muted); }
.access-cta { max-width: 1180px; margin: 0 auto 96px; padding: 42px 48px; display: flex; justify-content: space-between; align-items: center; gap: 32px; border: 1px solid var(--line); border-radius: var(--radius); }
.access-cta h2 { margin: 0; font-size: 32px; letter-spacing: -.035em; }
footer { max-width: 1180px; margin: auto; padding: 30px 24px 48px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer a { color: inherit; }
.footer-company, .footer-links { display: grid; gap: 5px; }
.footer-company strong { color: var(--ink); font-size: 14px; }
.footer-links { justify-items: end; text-align: right; }
.footer-links > a { color: var(--blue); font-weight: 700; text-decoration: none; }
@media (max-width: 820px) {
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 48px; padding-top: 56px; }
  .product-panel { transform: none; }
  .trust { grid-template-columns: 1fr; gap: 4px; }
  .features { grid-template-columns: 1fr; gap: 38px; margin: 72px auto; }
  .showcase-grid { grid-template-columns: 1fr; }
  .product-showcase { margin-bottom: 72px; }
  .pricing-calculator { margin-bottom: 72px; }
  .pricing-guide { grid-template-columns: 1fr; gap: 24px; }
  .tutorial { margin: 0 16px 72px; padding: 32px 24px; }
  .install { margin: 0 16px 72px; padding: 32px 24px; grid-template-columns: 1fr; gap: 36px; }
  .access-cta { margin: 0 16px 72px; padding: 32px 24px; align-items: flex-start; flex-direction: column; }
  footer { grid-template-columns: 1fr; }
  .footer-links { justify-items: start; text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

.auth-page { min-height: 100dvh; background: var(--surface); }
.auth-shell { width: min(100% - 32px, 520px); margin: 0 auto; padding: 54px 0; }
.auth-shell > .brand { display: inline-flex; margin-bottom: 30px; }
.auth-card { padding: 38px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 26px 70px rgba(21,59,116,.12); }
.auth-card h1 { font-size: 38px; letter-spacing: -.035em; }
.auth-intro { margin: 10px 0 26px; color: var(--muted); }
.auth-card form { display: grid; gap: 18px; }
.auth-card label { display: grid; gap: 7px; font-size: 14px; font-weight: 700; }
.auth-card input { width: 100%; min-height: 48px; padding: 10px 12px; color: var(--ink); background: #fff; border: 1px solid #aebdd1; border-radius: 8px; font: inherit; }
.auth-card input:focus { outline: 3px solid rgba(7,91,234,.2); border-color: var(--blue); }
.form-submit { width: 100%; margin-top: 4px; cursor: pointer; }
.form-error { margin-bottom: 18px; padding: 11px 13px; color: #a20f35; background: #fff0f4; border: 1px solid #f2b8c8; border-radius: 8px; font-size: 14px; }
.auth-switch { margin: 24px 0 0; color: var(--muted); text-align: center; font-size: 14px; }
.auth-switch a { color: var(--blue); font-weight: 700; }
.account-email { color: var(--muted); font-size: 13px; }
.nav-actions form { margin: 0; }
.logout { padding: 7px 13px; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.download-page { max-width: 980px; min-height: calc(100dvh - 150px); margin: auto; padding: 80px 24px; }
.download-page h1 { font-size: 52px; }
.license-panel { margin-top: 36px; padding: 26px 30px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px 36px; align-items: end; border: 2px solid var(--blue); border-radius: var(--radius); background: #fff; }
.license-panel > div > span, .license-panel > div > strong { display: block; }
.license-panel > div > strong { margin: 7px 0 2px; font-size: 17px; overflow-wrap: anywhere; }
.license-panel > div > span:last-child { color: var(--muted); font-size: 13px; }
.license-state { color: var(--blue); font-size: 13px; font-weight: 850; }
.license-panel label { display: grid; gap: 7px; font-size: 13px; font-weight: 750; }
.license-panel input { width: 100%; min-height: 46px; padding: 9px 11px; color: var(--ink); background: var(--surface); border: 1px solid #aebdd1; border-radius: 8px; font: 14px ui-monospace, SFMono-Regular, Consolas, monospace; }
.license-panel p { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 13px; }
.pending-license { grid-template-columns: 1fr auto; border-color: var(--line); }
.pending-license .download { margin: 0; }
.download-row { margin-top: 50px; padding: 28px 30px; display: flex; justify-content: space-between; align-items: center; gap: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.download-row strong, .download-row span { display: block; }
.download-row strong { font-size: 20px; }
.download-row span { margin-top: 4px; color: var(--muted); font-size: 14px; }
.download-note { margin-top: 54px; padding-top: 28px; border-top: 1px solid var(--line); }
.download-note h2 { margin: 0 0 8px; }
.download-note p { margin: 0; color: var(--muted); }
@media (max-width: 620px) {
  .brand-name { display: none; }
  .account-email { display: none; }
  .auth-card { padding: 28px 22px; }
  .download-row { align-items: flex-start; flex-direction: column; }
  .license-panel, .pending-license { grid-template-columns: 1fr; align-items: stretch; }
}

.home-price {
  max-width: 1180px;
  margin: 0 auto 96px;
  padding: 42px 48px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(115deg, #f7faff 0%, #edf5ff 100%);
}
.home-price h2 { margin: 0; font-size: 32px; letter-spacing: -.03em; }
.home-price p:last-child { margin: 10px 0 0; color: var(--muted); }
.home-price-action { display: flex; align-items: center; gap: 28px; }
.home-price-action strong { color: var(--ink); font-size: 46px; line-height: 1; white-space: nowrap; }
.home-price-action strong small { font-size: 22px; }
.home-price-action strong span { color: var(--muted); font-size: 15px; font-weight: 600; }

.commerce-page { max-width: 1080px; min-height: calc(100dvh - 160px); margin: auto; padding: 72px 24px 96px; }
.product-title { max-width: 760px; }
.product-title h1 { font-size: clamp(42px, 6vw, 68px); }
.offer-layout { margin-top: 54px; display: grid; grid-template-columns: 1.35fr .65fr; gap: 28px; align-items: start; }
.offer-detail, .price-box, .order-card { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.offer-detail { padding: 36px; }
.offer-detail h2, .purchase-steps h2 { margin: 0 0 22px; font-size: 28px; }
.check-list { margin: 0 0 30px; padding: 0; list-style: none; }
.check-list li { position: relative; padding: 12px 0 12px 30px; border-bottom: 1px solid var(--line); }
.check-list li::before { content: "✓"; position: absolute; left: 2px; color: var(--blue); font-weight: 900; }
.service-note { display: grid; grid-template-columns: 90px 1fr; gap: 16px; margin-top: 14px; color: var(--muted); font-size: 14px; }
.service-note strong { color: var(--ink); }
.price-box { position: sticky; top: 24px; padding: 32px; background: var(--surface); box-shadow: 0 24px 60px rgba(21,59,116,.11); }
.price-label { color: var(--blue); font-weight: 800; }
.price { margin: 18px 0 14px; font-size: 64px; font-weight: 850; letter-spacing: -.06em; line-height: 1; }
.price small { font-size: 26px; vertical-align: 18px; }
.price span { margin-left: 8px; color: var(--muted); font-size: 15px; letter-spacing: 0; }
.price-box p { color: var(--muted); font-size: 14px; }
.wide-button { width: 100%; margin-top: 16px; cursor: pointer; }
.secondary-button { padding: 13px 18px; border: 1px solid var(--blue); border-radius: 10px; background: #fff; color: var(--blue); font: inherit; font-weight: 700; }
.secondary-button:hover { background: #eef5ff; }
.policy-links { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 14px; }
.policy-links a { color: var(--blue); font-size: 13px; }
.purchase-steps { margin-top: 72px; padding-top: 42px; border-top: 1px solid var(--line); }
.purchase-steps ol { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; list-style: none; counter-reset: steps; }
.purchase-steps li { padding: 22px; background: var(--surface); border-radius: 12px; counter-increment: steps; }
.purchase-steps li::before { content: counter(steps); display: block; margin-bottom: 24px; color: var(--blue); font-size: 13px; font-weight: 900; }
.purchase-steps b, .purchase-steps span { display: block; }
.purchase-steps span { margin-top: 7px; color: var(--muted); font-size: 14px; }

.checkout-bg { min-height: 100dvh; background: var(--surface); }
.checkout-page { width: min(100% - 32px, 760px); margin: auto; padding: 64px 0 96px; }
.checkout-page h1 { font-size: 48px; }
.order-card { margin-top: 34px; padding: 34px; box-shadow: 0 24px 70px rgba(21,59,116,.1); }
.order-product { padding-bottom: 24px; display: flex; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.order-product strong, .order-product span { display: block; }
.order-product strong { font-size: 18px; }
.order-product span { color: var(--muted); font-size: 14px; }
.order-product > b { font-size: 20px; white-space: nowrap; }
.order-summary { margin: 18px 0 24px; }
.order-summary div { grid-template-columns: 120px 1fr; padding: 11px 0; }
.order-summary dt { color: var(--muted); font-weight: 500; }
.order-summary dd { text-align: right; overflow-wrap: anywhere; }
.order-summary .total { margin-top: 10px; padding-top: 20px; border-top: 1px solid var(--line); }
.order-summary .total dt, .order-summary .total dd { color: var(--ink); font-size: 20px; font-weight: 850; }
.consent { display: flex; gap: 8px; align-items: flex-start; color: var(--muted); font-size: 13px; }
.consent input { margin-top: 4px; }
.consent a { color: var(--blue); }
.cashier-total { display: flex; justify-content: space-between; align-items: end; gap: 24px; padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.cashier-total span { color: var(--muted); font-size: 13px; }
.cashier-total strong { font-size: 38px; }
.payment-method { margin: 24px 0; padding: 18px; display: grid; grid-template-columns: 46px 1fr auto; gap: 14px; align-items: center; border: 2px solid var(--blue); border-radius: 12px; }
.pay-logo { width: 44px; height: 44px; display: grid; place-items: center; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.pay-logo img { display: block; object-fit: contain; }
.pay-logo.wechat img { width: 28px; height: 28px; }
.payment-method strong, .payment-method span { display: block; }
.payment-method span { color: var(--muted); font-size: 13px; }
.payment-notice { margin: 16px 0; padding: 13px 15px; color: #7a4b00; background: #fff8e6; border: 1px solid #ead39a; border-radius: 10px; font-size: 14px; }
.safe-tip { margin: 14px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
.download-purchase { margin-top: 42px; padding: 26px 28px; display: flex; justify-content: space-between; align-items: center; gap: 24px; border: 1px solid var(--line); border-radius: var(--radius); }
.download-purchase strong, .download-purchase span { display: block; }
.download-purchase span { margin-top: 4px; color: var(--muted); font-size: 14px; }
.download-purchase .download { margin: 0; width: auto; white-space: nowrap; }

.legal-page { max-width: 820px; min-height: calc(100dvh - 160px); margin: auto; padding: 72px 24px 96px; }
.legal-page h1 { font-size: 52px; }
.legal-date { margin: 10px 0 48px; color: var(--muted); }
.legal-page h2 { margin: 34px 0 8px; font-size: 21px; }
.legal-page p { color: var(--muted); }

@media (max-width: 820px) {
  .home-price { margin: 0 16px 72px; padding: 32px 24px; grid-template-columns: 1fr; gap: 28px; }
  .home-price-action { justify-content: space-between; }
  .offer-layout { grid-template-columns: 1fr; }
  .price-box { position: static; }
  .purchase-steps ol { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .home-price-action, .download-purchase { align-items: stretch; flex-direction: column; }
  .purchase-steps ol { grid-template-columns: 1fr; }
  .checkout-page h1 { font-size: 38px; }
  .order-card { padding: 24px 20px; }
  .service-note { grid-template-columns: 1fr; gap: 2px; }
  .pricing-steps { grid-template-columns: 1fr; }
  .pricing-steps li:nth-last-child(2) { border-bottom: 1px solid var(--line); }
}
/* 2026-10-11 dual product navigation and standalone pricing calculator */
.nav-link.active{color:#075bd8;border-bottom:3px solid #0b6cff}
.standalone-offer{margin:28px 0 0;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:28px 32px;border:1px solid #9ed8ff;background:#f4f9ff}
.standalone-offer>div:first-child{display:grid;gap:6px}.standalone-offer span{color:#607d9f}.standalone-offer strong{font-size:24px;color:#0b2d55}.standalone-offer p{margin:0;color:#607d9f}
.standalone-price{display:flex;align-items:baseline;gap:8px;white-space:nowrap}.standalone-price b{font-size:36px;color:#0b6cff}.standalone-price .download{margin-left:18px}
.product-commerce{max-width:1180px}.product-license-card{margin:22px 0;padding:26px 30px;border:1px solid #9ed8ff;background:#fff}.product-license-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.product-license-head>div{display:flex;align-items:baseline;gap:18px}.product-license-head strong{font-size:22px;color:#0b2d55}
.status-chip{padding:6px 12px;border-radius:999px;background:#e7f8ef;color:#087443;font-weight:700}.status-chip.pending{background:#eef3f8;color:#607d9f}.product-license-card>.download{margin-top:16px}.product-license-card .license-panel{margin:0 0 12px}
@media(max-width:760px){.standalone-offer,.standalone-price,.product-license-head,.product-license-head>div{align-items:flex-start;flex-direction:column}.standalone-price .download{margin-left:0}.nav-actions{gap:2px;margin-left:14px}.nav-link{font-size:14px;padding:10px 7px}.nav-actions>.nav-link:nth-child(3){margin-left:auto}.account-email{display:none}}