:root {
  --ink: #172b46;
  --muted: #52637a;
  --blue: #165dea;
  --blue-dark: #1046b5;
  --line: #dce5f0;
  --pale: #f3f7fd;
  --card-radius: 18px;
  --button-radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 94px; }
body { margin: 0; font-size: 16px; line-height: 1.7; }
body.modal-open { overflow: hidden; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, a, summary { touch-action: manipulation; }
button:disabled { cursor: wait; }
button:focus-visible, input:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid #2c70ef; outline-offset: 4px; }
::selection { background: #dce9ff; }
[hidden] { display: none !important; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
h1, h2, h3, h4 { font-weight: 650; }
ul { padding-left: 1.15em; }
.container { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.section-space { padding-block: 88px; }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link:focus { position: fixed; top: 12px; left: 12px; z-index: 50; padding: 10px 16px; background: #fff; color: var(--blue); }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 24px; min-height: 50px; padding: 12px 23px; border: 1px solid transparent; border-radius: var(--button-radius); font-size: 15px; line-height: 1.5; font-weight: 600; white-space: nowrap; transition: background .18s, border-color .18s, color .18s, transform .18s; }
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button-primary { color: #fff; background: var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-outline { background: #fff; color: var(--ink); border-color: #cbd7e6; }
.button-outline:hover { background: #f0f5ff; border-color: #9bb9ee; }
.button-small { min-height: 44px; padding: 9px 17px; font-size: 14px; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, .96); border-bottom: 1px solid rgba(220, 229, 240, .75); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; position: relative; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; background: var(--blue); color: #fff; font: 700 28px/1 Arial, sans-serif; }
.brand-name { font-size: 20px; line-height: 1.35; font-weight: 700; letter-spacing: .8px; }
.brand-name small { display: block; margin-top: 3px; font-size: 11px; color: var(--muted); font-weight: 400; letter-spacing: 1px; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { display: flex; align-items: center; min-height: 44px; font-size: 14px; font-weight: 500; color: #44556b; padding: 8px 0; white-space: nowrap; }
.site-nav a:hover { color: var(--blue); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.menu-toggle { display: none; min-height: 44px; padding: 8px 10px; border: 0; border-radius: 8px; background: #edf3fc; color: var(--ink); font-size: 14px; }

.hero { overflow: hidden; background: #f6f9ff; }
.hero-layout { display: grid; grid-template-columns: 1.03fr 1fr; align-items: center; gap: 32px; padding-block: 72px 76px; }
.eyebrow { color: var(--blue); font-size: 13px; font-weight: 600; letter-spacing: 1.4px; margin-bottom: 22px; }
.hero h1 { font-size: clamp(42px, 4.6vw, 64px); line-height: 1.2; letter-spacing: -2px; font-weight: 750; }
.hero h1 span { color: var(--blue); }
.hero-description { color: var(--muted); font-size: 17px; line-height: 1.9; margin-top: 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-visual { position: relative; width: 100%; aspect-ratio: 4 / 3; display: grid; align-items: center; overflow: hidden; border-radius: 22px; background: #edf4ff; }
.hero-visual img { width: 100%; height: auto; mix-blend-mode: multiply; }

.section-heading { max-width: 700px; margin-bottom: 42px; }
.section-heading h2, .support h2, .contact-section h2 { font-size: clamp(29px, 3.1vw, 42px); line-height: 1.3; letter-spacing: -.8px; }
.section-heading > p:not(.eyebrow) { margin-top: 18px; color: var(--muted); max-width: 610px; line-height: 1.9; }
.section-note { color: var(--muted); font-size: 14px; margin-top: 32px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 68px; row-gap: 32px; }
.feature-item { padding-left: 20px; border-left: 2px solid #c9dafa; }
.feature-item h3 { font-size: 18px; line-height: 1.5; margin-bottom: 9px; }
.feature-item p { color: var(--muted); line-height: 1.85; font-size: 15px; max-width: 450px; }

.showcase { border-top: 1px solid var(--line); }
.showcase .eyebrow { margin-bottom: 15px; }
.demo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.demo-card { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--card-radius); background: #fff; }
.demo-video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #0c1725; }
.demo-video:focus-visible { outline: 3px solid var(--blue); outline-offset: -3px; }
.demo-details { padding: 22px; }
.demo-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 16px; justify-content: space-between; }
.demo-title h3 { font-size: 18px; line-height: 1.5; }
.demo-title > span { color: var(--muted); font-size: 12px; white-space: nowrap; }
.demo-details > p { margin-top: 10px; font-size: 14px; line-height: 1.85; color: var(--muted); }
.showcase-next { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; padding-top: 30px; }
.showcase-next > p { color: var(--muted); font-size: 14px; }

.pricing { background: var(--pale); }
.pricing .section-heading { margin-bottom: 28px; }
.plan-switch { display: inline-flex; gap: 4px; padding: 5px; background: #e5edf8; border-radius: 12px; margin-bottom: 28px; }
.plan-switch button { min-height: 42px; min-width: 132px; padding: 8px 23px; border: none; border-radius: 8px; background: transparent; font-size: 15px; color: #4c5d75; }
.plan-switch button[aria-selected="true"] { background: #fff; color: var(--ink); font-weight: 600; }
.plan-panel + .plan-panel { margin-top: 30px; }
.js .plan-panel + .plan-panel { margin-top: 0; }
.panel-heading { font-size: 17px; color: var(--muted); margin-bottom: 17px; }
.js .panel-heading { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.plan-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.plan-card { position: relative; display: flex; flex-direction: column; min-height: 420px; padding: 28px 24px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--card-radius); }
.plan-card h4 { font-size: 19px; }
.plan-for { margin-top: 5px; font-size: 13px; color: var(--muted); }
.price { display: flex; align-items: baseline; gap: 5px; margin-top: 20px; line-height: 1.2; white-space: nowrap; }
.price .currency { font-size: 20px; font-weight: 600; }
.price strong { font-size: 43px; font-weight: 700; letter-spacing: -1.8px; font-variant-numeric: tabular-nums; }
.price > span:last-child { margin-left: 3px; color: var(--muted); font-size: 14px; }
.plan-card ul { margin-top: 23px; font-size: 14px; line-height: 1.8; }
.plan-card li { margin-bottom: 7px; }
.plan-card li::marker { color: #6583ad; }
.plan-detail { margin-top: 13px; margin-bottom: 21px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.plan-card > .button { margin-top: auto; width: 100%; gap: 10px; }
.plan-featured { background: #eaf1ff; border-color: #91b4f5; }
.plan-label { position: absolute; right: 18px; top: 18px; padding: 2px 9px; color: var(--blue); background: #d5e4ff; font-size: 12px; border-radius: 6px; font-weight: 600; }
.plan-featured .price { color: #114ebf; }
.merchant-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.merchant-card { min-height: 385px; display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 16px; }
.merchant-card > .price { margin-top: 0; }
.merchant-card > ul, .merchant-card > .plan-detail, .merchant-card > .button { grid-column: 1 / -1; }
.merchant-card > .button { width: fit-content; min-width: 160px; justify-self: start; }
.pricing-note { margin-top: 22px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.extras-block { display: grid; grid-template-columns: .7fr 1.5fr; gap: 70px; margin-top: 76px; padding-top: 54px; border-top: 1px solid var(--line); }
.extras-intro h3 { font-size: 32px; line-height: 1.4; letter-spacing: -.6px; }
.extras-intro p { margin-top: 16px; font-size: 15px; color: var(--muted); }
.extra-row { display: flex; gap: 24px; align-items: center; justify-content: space-between; padding: 19px 0; border-bottom: 1px solid var(--line); }
.extra-row:first-child { padding-top: 0; }
.extra-row h4 { font-size: 16px; margin-bottom: 5px; }
.extra-row p { color: var(--muted); font-size: 13px; line-height: 1.85; }
.extra-row a { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue); font-size: 13px; padding: 7px 0; white-space: nowrap; }
.extra-row a:hover { text-decoration: underline; text-underline-offset: 4px; }
.extra-action { flex-shrink: 0; display: flex; flex-direction: column; align-items: flex-end; }
.extra-action strong { font-size: 22px; line-height: 1.4; font-weight: 650; }

.services { background: #112b4d; color: #fff; }
.services .eyebrow { color: #a6c7ff; }
.services .section-heading > p:not(.eyebrow) { color: #cad8ea; }
.service-grid { display: grid; grid-template-columns: 1fr 1fr 1.14fr; gap: 30px; }
.service-card { padding: 28px 4px 10px; display: flex; flex-direction: column; align-items: flex-start; min-height: 300px; border-top: 1px solid #47617e; }
.service-card h3 { font-size: 20px; }
.service-price { display: flex; align-items: baseline; gap: 5px; margin-top: 20px; margin-bottom: 19px; font-size: 20px; }
.service-price strong { font-size: 44px; line-height: 1.2; letter-spacing: -1px; }
.service-price span { font-size: 14px; color: #cad8ea; margin-left: 2px; }
.service-card > p:not(.service-price) { color: #cad8ea; line-height: 1.9; font-size: 14px; max-width: 270px; }
.service-card > a { display: flex; justify-content: space-between; min-height: 44px; width: 100%; margin-top: auto; padding-top: 24px; font-size: 14px; font-weight: 600; }
.service-card a:hover { text-decoration: underline; text-underline-offset: 5px; }
.service-combined { position: relative; padding: 28px; margin-top: -12px; border: 0; background: #e9f1ff; border-radius: var(--card-radius); color: var(--ink); }
.service-combined .service-price span, .service-combined > p:not(.service-price) { color: var(--muted); }
.service-combined > a { color: var(--blue); }
.service-type { margin-bottom: 10px; color: var(--blue); font-size: 12px; }

.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 35px; padding: 0; list-style: none; }
.step-number { display: grid; place-items: center; width: 40px; height: 40px; background: #ecf2fd; color: var(--blue); border-radius: 12px; font-size: 18px; font-weight: 600; margin-bottom: 20px; }
.steps h3 { font-size: 17px; margin-bottom: 11px; }
.steps p { color: var(--muted); font-size: 14px; line-height: 1.9; }
.support { background: #f6f8fc; }
.support-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.support-intro > p { color: var(--muted); margin-top: 18px; font-size: 15px; }
.notice { padding: 24px; background: #e8effc; border-radius: var(--card-radius); margin-top: 34px; max-width: 390px; }
.notice > span { color: var(--blue); font-size: 13px; }
.notice h3 { margin-top: 10px; font-size: 21px; }
.notice p { margin-top: 13px; color: #445a75; font-size: 14px; line-height: 1.9; }
.notice a { display: inline-flex; min-height: 44px; gap: 25px; align-items: center; margin-top: 20px; color: var(--blue); font-size: 13px; font-weight: 600; }
.faq-list details { padding: 20px 0; border-bottom: 1px solid #d5dfed; }
.faq-list details:first-child { padding-top: 0; }
.faq-list summary { cursor: pointer; font-size: 16px; font-weight: 600; padding: 7px 0; line-height: 1.8; }
.faq-list summary::marker { color: var(--blue); font-size: 12px; }
.faq-list details p { color: var(--muted); font-size: 14px; line-height: 1.95; margin-top: 13px; padding-left: 16px; }

.contact-section { padding-block: 76px; background: #eaf1ff; }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 50px; }
.contact-section .eyebrow { margin-bottom: 18px; }
.contact-section h2 { font-size: 44px; }
.contact-section h2 + p { margin-top: 20px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.contact-action { justify-self: end; min-width: 315px; }
.contact-label { color: var(--muted); font-size: 14px; }
.wechat-display { display: block; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 50px; font-weight: 600; letter-spacing: -2px; line-height: 1.5; margin: 4px 0 20px; }
.contact-action > p { margin-top: 14px; font-size: 13px; color: var(--muted); }
.site-footer { padding-block: 27px; background: #fff; }
.footer-inner { display: flex; align-items: center; gap: 26px; color: var(--muted); font-size: 12px; flex-wrap: wrap; }
.footer-brand { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink); font-size: 17px; font-weight: 650; }
.footer-inner > span { margin-left: auto; }

.contact-dialog { width: min(464px, calc(100% - 32px)); max-height: calc(100dvh - 32px); margin: auto; padding: 28px; border: 1px solid #dce5f0; border-radius: var(--card-radius); color: var(--ink); background: #fff; box-shadow: 0 28px 90px #00122b33; }
.contact-dialog::backdrop { background: #061b3677; }
.dialog-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.dialog-brand { font-weight: 650; font-size: 15px; color: var(--blue); }
.dialog-close { min-height: 44px; min-width: 44px; padding: 8px; color: var(--muted); border: 0; border-radius: 8px; background: #f2f5fa; font-size: 13px; }
.dialog-close:hover { background: #e4ecf7; }
.contact-dialog h2 { font-size: 27px; line-height: 1.4; }
#contact-context { color: var(--muted); margin-top: 12px; margin-bottom: 27px; font-size: 14px; line-height: 1.8; overflow-wrap: anywhere; }
.wechat-field-label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 13px; }
.wechat-field { display: flex; align-items: center; gap: 6px; padding: 5px; background: #f4f7fc; border: 1px solid #cfdbed; border-radius: 12px; }
.wechat-field input { min-width: 0; width: 100%; flex: 1; padding: 8px 6px 8px 12px; border: 0; border-radius: 6px; color: var(--ink); background: transparent; font: 600 23px/1.6 ui-monospace, Consolas, monospace; }
.wechat-field .button { flex-shrink: 0; min-height: 44px; padding: 10px 14px; font-size: 13px; }
.copy-status { min-height: 3.5em; padding-top: 11px; color: #47617f; font-size: 13px; line-height: 1.75; }
.dialog-note { padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.9; color: var(--muted); }

@media (max-width: 1120px) {
  .site-nav { gap: 19px; }
  .header-inner { gap: 18px; }
  .plan-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .plan-card { min-height: 390px; }
  .merchant-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .support-grid { gap: 55px; }
  .hero h1 { font-size: 52px; }
  .extras-block { gap: 45px; }
}
@media (max-width: 960px) {
  .container { width: min(1180px, calc(100% - 48px)); }
  .header-inner { flex-wrap: wrap; gap: 10px; padding-block: 12px; min-height: 72px; }
  .site-nav { order: 3; width: 100%; flex-wrap: wrap; justify-content: center; gap: 12px 22px; padding: 12px 0 4px; }
  .js .menu-toggle { display: block; }
  .js .site-nav { display: none; position: absolute; top: 100%; right: 0; width: 260px; align-items: stretch; padding: 12px 20px; border: 1px solid var(--line); border-radius: 0 0 14px 14px; background: #fff; box-shadow: 0 20px 30px #122a4512; }
  .js .site-nav.is-open { display: flex; flex-direction: column; gap: 0; }
  .js .site-nav a { padding: 13px 4px; }
  .hero-layout { gap: 10px; padding-block: 55px 60px; }
  .hero h1 { font-size: 44px; letter-spacing: -1px; }
  .hero-description { font-size: 15px; }
  .hero-actions .button { padding-inline: 18px; gap: 16px; }
  .section-space { padding-block: 68px; }
  .feature-grid { column-gap: 36px; }
  .demo-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .demo-card { display: grid; grid-template-columns: 1.25fr 1fr; align-items: center; }
  .service-grid { gap: 25px; grid-template-columns: 1fr 1fr; }
  .service-combined { grid-column: 1 / -1; margin-top: 0; min-height: 0; }
  .service-combined > p:not(.service-price) { max-width: 100%; }
  .steps { gap: 22px; }
  .contact-action { min-width: 270px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 90px; }
  .container { width: calc(100% - 40px); }
  .brand-mark { width: 34px; height: 34px; font-size: 25px; border-radius: 10px; }
  .brand-name { font-size: 18px; }
  .brand-name small { font-size: 11px; letter-spacing: .2px; }
  .header-actions { gap: 7px; }
  .button-small { min-height: 44px; padding: 9px 12px; font-size: 12px; }
  .menu-toggle { font-size: 12px; padding-inline: 9px; }
  .hero-layout { grid-template-columns: minmax(0, 1fr); gap: 12px; padding-block: 44px 22px; }
  .hero .eyebrow { margin-bottom: 18px; }
  .hero h1 { font-size: clamp(38px, 8.8vw, 52px); line-height: 1.25; letter-spacing: -1.2px; }
  .hero-description { margin-top: 20px; font-size: 15px; line-height: 1.9; }
  .hero-actions { margin-top: 25px; }
  .hero-actions .button { min-height: 48px; padding-inline: 21px; font-size: 14px; gap: 25px; }
  .hero-visual { aspect-ratio: 4 / 3; max-width: 500px; margin-inline: auto; }
  .hero-visual img { width: 100%; margin-left: 0; }
  .section-space { padding-block: 58px; }
  .section-heading { margin-bottom: 31px; }
  .section-heading h2, .support h2 { font-size: 30px; line-height: 1.35; }
  .section-heading > p:not(.eyebrow) { font-size: 14px; margin-top: 15px; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .feature-item { padding-left: 16px; }
  .feature-item h3 { font-size: 17px; }
  .feature-item p { font-size: 14px; }
  .section-note { font-size: 12px; }
  .demo-card { display: block; }
  .demo-details { padding: 20px; }
  .demo-title h3 { font-size: 17px; }
  .showcase-next { align-items: flex-start; gap: 15px; }
  .showcase-next > p { font-size: 13px; }
  .plan-switch { width: 100%; }
  .plan-switch button { min-width: 0; flex: 1; }
  .plan-grid, .merchant-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .plan-card { min-height: 0; padding: 25px; }
  .plan-card > .button { margin-top: 3px; }
  .plan-card h4 { font-size: 20px; }
  .plan-card .price { margin-top: 16px; }
  .plan-card .price strong { font-size: 44px; }
  .plan-card ul { margin-top: 20px; }
  .merchant-card > .price { margin-top: 0; }
  .merchant-card > .button { width: 100%; min-width: 0; }
  .pricing-note { font-size: 12px; }
  .extras-block { grid-template-columns: minmax(0, 1fr); gap: 27px; padding-top: 35px; margin-top: 42px; }
  .extras-intro h3 { font-size: 28px; }
  .extras-intro h3 br { display: none; }
  .extras-intro p { margin-top: 9px; font-size: 14px; }
  .extra-row { gap: 17px; }
  .extra-row h4 { font-size: 15px; }
  .extra-row p { font-size: 12px; }
  .extra-row a { font-size: 12px; }
  .extra-action strong { font-size: 20px; }
  .services .section-heading { margin-bottom: 24px; }
  .service-grid { grid-template-columns: minmax(0, 1fr); gap: 25px; }
  .service-card { min-height: 0; padding: 24px 0 0; }
  .service-card > p:not(.service-price) { max-width: 100%; }
  .service-card > a { padding-top: 17px; }
  .service-combined { grid-column: auto; padding: 25px; margin-top: 2px; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 25px; }
  .steps li { display: grid; grid-template-columns: 40px minmax(0, 1fr); column-gap: 18px; }
  .step-number { grid-row: 1 / 3; margin-bottom: 0; }
  .steps h3 { margin-bottom: 7px; }
  .steps p { grid-column: 2; font-size: 13px; }
  .support-grid { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .notice { max-width: 100%; margin-top: 25px; padding: 22px; }
  .faq-list summary { font-size: 15px; }
  .faq-list details p { font-size: 13px; }
  .contact-section { padding-block: 56px; }
  .contact-layout { grid-template-columns: minmax(0, 1fr); gap: 31px; }
  .contact-section h2 { font-size: 37px; }
  .contact-action { justify-self: start; min-width: 0; }
  .wechat-display { font-size: 44px; }
  .footer-inner { gap: 10px; flex-direction: column; align-items: flex-start; }
  .footer-inner > span { margin-left: 0; }
  .contact-dialog { padding: 24px; }
  .wechat-field input { font-size: 21px; padding-left: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}