:root {
  --ink: #122033;
  --text: #27384c;
  --muted: #637187;
  --line: #d7dee7;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --blue: #176b87;
  --blue-dark: #102a43;
  --green: #16704b;
  --amber: #8a4b08;
  --requirement-cta-bg: #d9f1f0;
  --requirement-cta-border: #8dc7c9;
  --requirement-cta-hover: #b9e5e3;
  --requirement-cta-text: #102a43;
  --shadow: 0 14px 35px rgba(16, 42, 67, .1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 16px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 80px;
  padding: 0 max(28px, calc((100vw - 1320px) / 2));
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--blue-dark); font-size: 23px; font-weight: 850; white-space: nowrap; }
.brand-logo { width: 42px; height: 42px; flex: 0 0 42px; }
.nav { display: flex; align-items: center; gap: 36px; color: #303f51; font-size: 15px; font-weight: 600; white-space: nowrap; }
.nav a { position: relative; flex: 0 0 auto; padding: 28px 0 26px; }
.nav a::after {
  position: absolute;
  right: 0;
  bottom: 19px;
  left: 0;
  height: 2px;
  background: var(--blue);
  content: "";
  opacity: 0;
  transform: scaleX(.4);
  transition: opacity .2s ease, transform .2s ease;
}
.nav a:hover, .nav a:focus-visible, .nav a[aria-current="page"], .text-link { color: var(--blue); }
.nav a:hover::after, .nav a:focus-visible::after, .nav a[aria-current="page"]::after { opacity: 1; transform: scaleX(1); }
.nav a.nav-cta {
  min-height: 38px;
  padding: 8px 15px;
  border: 1px solid var(--requirement-cta-border);
  border-radius: 6px;
  background: var(--requirement-cta-bg);
  color: var(--requirement-cta-text);
  transition: background-color .2s ease, border-color .2s ease;
}
.nav a.nav-cta::after { display: none; }
.nav a.nav-cta:hover, .nav a.nav-cta:focus-visible { border-color: var(--requirement-cta-border); background: var(--requirement-cta-hover); color: var(--requirement-cta-text); }
.hero {
  padding: 86px clamp(18px, 5vw, 72px) 72px;
  background: #f4f7f8;
  border-bottom: 1px solid var(--line);
}
.hero-inner, .wrap { width: min(1120px, 100%); margin: 0 auto; }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 14px; font-weight: 800; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 900px; margin-bottom: 20px; color: var(--ink); font-size: 54px; line-height: 1.08; letter-spacing: 0; }
h2 { color: var(--ink); font-size: 36px; line-height: 1.2; letter-spacing: 0; }
h3 { color: var(--blue-dark); line-height: 1.35; }
.lead { max-width: 820px; color: var(--muted); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--blue-dark);
  border-radius: 8px;
  background: var(--blue-dark);
  color: #fff;
  font-weight: 750;
}
.btn.secondary { background: #fff; color: var(--blue-dark); }
main section { padding: 72px clamp(18px, 5vw, 72px); }
main section.band { background: var(--soft); }
.section-head { margin-bottom: 30px; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(16, 42, 67, .05);
}
.card p:last-child, .prose p:last-child { margin-bottom: 0; }
.tag { display: inline-block; margin-bottom: 12px; color: var(--blue); font-size: 13px; font-weight: 800; }
.product-views { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.product-view { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: #edf1f4; }
.product-view img { width: 100%; height: 360px; object-fit: contain; }
.product-view.dark img { background: #0b1118; }
.product-view figcaption { display: grid; gap: 3px; padding: 16px 18px; background: #fff; border-top: 1px solid var(--line); }
.product-view figcaption strong { color: var(--blue-dark); }
.product-view figcaption span { color: var(--muted); font-size: 14px; }
.steps { margin: 0; padding-left: 22px; }
.steps li { margin-bottom: 12px; padding-left: 6px; }
.prose { max-width: 860px; }
.legal-prose h2 { margin-top: 42px; font-size: 28px; }
.legal-prose h2:first-child { margin-top: 0; }
.notice { padding: 18px 20px; border-left: 4px solid var(--amber); background: #fff8ef; }
.product-cta { background: var(--blue-dark); color: #dce6ee; }
.product-cta-layout { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 64px; align-items: center; }
.product-cta h2 { margin-bottom: 12px; color: #fff; }
.product-cta .eyebrow { color: #72cad1; }
.product-cta .lead { margin-bottom: 0; color: #becbd6; }
.product-cta .actions { justify-content: flex-end; margin-top: 0; }
.product-cta .btn { border-color: #fff; background: #fff; color: var(--blue-dark); }
.product-cta .btn.secondary { border-color: #8da5b7; background: transparent; color: #fff; }
.meta { display: grid; gap: 6px; color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
.download-main { padding-top: 64px; padding-bottom: 64px; }
.download-feature { max-width: 760px; }
.download-feature h2 { margin-bottom: 12px; }
.download-feature .actions { margin-top: 28px; }
.download-note { padding-top: 54px; padding-bottom: 54px; }
.download-note .section-head { margin-bottom: 8px; }
.download-note .lead { margin-bottom: 0; }
.support-page { background: #f7f8f6; font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; }
.contact-hero { padding: 64px clamp(18px, 5vw, 72px) 58px; background: #eef2ef; border-bottom: 1px solid #d7ded9; }
.contact-hero-inner { display: block; }
.contact-hero .eyebrow { color: var(--blue); }
.contact-hero h1 { max-width: 820px; margin-bottom: 14px; color: var(--ink); font-size: 46px; }
.contact-hero .lead { max-width: 760px; margin-bottom: 0; color: #526177; line-height: 1.8; }
.contact-hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 28px; }
.contact-primary-cta { min-height: 50px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: space-between; gap: 16px; border: 1px solid var(--requirement-cta-border); border-radius: 6px; background: var(--requirement-cta-bg); color: var(--requirement-cta-text); font-size: 17px; font-weight: 800; box-shadow: none; transition: background-color .2s ease, border-color .2s ease, transform .2s ease; }
.contact-primary-cta span:last-child { color: var(--blue); font-size: 23px; transition: transform .2s ease; }
.contact-primary-cta:hover, .contact-primary-cta:focus-visible { border-color: var(--requirement-cta-border); background: var(--requirement-cta-hover); transform: translateY(-1px); }
.contact-primary-cta:hover span:last-child, .contact-primary-cta:focus-visible span:last-child { transform: translateX(4px); }
.contact-primary-cta:focus-visible { outline: 3px solid rgba(23, 107, 135, .24); outline-offset: 4px; }
.contact-main { padding: 62px clamp(18px, 5vw, 72px) 78px; background: #fff; }
.contact-main-layout { max-width: 720px; }
.contact-channel-panel { padding: 0; border: 0; background: transparent; box-shadow: none; }
.contact-channel-panel h2 { margin-bottom: 24px; font-size: 28px; }
.contact-channel-panel .support-contacts { border-color: #c2cec8; }
.contact-channel-panel .support-contacts p { border-color: #c2cec8; }
.contact-channel-panel .contact-channel-actions { margin-top: 22px; }
.wechat-slot { min-height: 0; }
.faq-guide .faq-hero { padding-top: 64px; padding-bottom: 58px; }
.faq-guide .faq-hero h1 { max-width: 780px; }
.faq-guide-main { padding: 68px clamp(18px, 5vw, 72px) 86px; background: #fff; }
.faq-guide-heading { margin-bottom: 28px; }
.faq-guide-heading h2 { margin-bottom: 0; font-size: 38px; }
.faq-guide-main .faq-list { max-width: 1000px; }
.faq-guide .guide-finish { background: var(--blue-dark); }
.support-main { padding-top: 74px; padding-bottom: 92px; }
.support-main-layout { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(290px, .7fr); gap: 76px; align-items: stretch; }
.support-faq-panel { min-width: 0; }
.support-faq-panel h1, .support-contact-panel h2 { margin-bottom: 28px; letter-spacing: 0; }
.support-faq-panel h1 { font-size: 44px; line-height: 1.2; font-weight: 820; }
.support-contact-panel { padding: 0 0 0 38px; border-left: 1px solid #ccd4d0; background: transparent; }
.support-contact-panel h2 { min-height: 53px; font-size: 28px; line-height: 1.25; font-weight: 800; }
.faq-list { max-width: 920px; border-top: 2px solid #9eaaa5; }
.faq-list details { border-bottom: 1px solid #ccd4d0; transition: background-color .2s ease; }
.faq-list details[open] { background: #fff; }
.faq-list summary {
  min-height: 74px;
  padding: 18px 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 30px;
  align-items: center;
  gap: 20px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.6;
  font-weight: 720;
  cursor: pointer;
  list-style: none;
  overflow-wrap: anywhere;
}
.faq-list summary::marker { content: ""; font-size: 0; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid #9aaba5;
  border-radius: 50%;
  color: var(--blue);
  content: "+";
  font: 500 20px/1 system-ui, sans-serif;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}
.faq-list details[open] summary { color: #0c5c68; }
.faq-list details[open] summary::after { border-color: var(--blue); background: var(--blue); color: #fff; content: "−"; }
.faq-list summary:hover { color: #0c5c68; }
.faq-list summary:focus-visible { outline: 3px solid rgba(23, 107, 135, .2); outline-offset: -3px; }
.faq-list details p { max-width: 780px; margin: -2px 58px 0 14px; padding-bottom: 24px; color: #526177; font-size: 16px; line-height: 1.85; overflow-wrap: anywhere; }
.support-contact { padding-top: 62px; padding-bottom: 62px; background: #eef2ef; }
.support-contact > .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .8fr); gap: 72px; align-items: center; }
.support-contact-copy h2 { margin-bottom: 12px; }
.support-contact-copy .lead { margin-bottom: 0; }
.support-contacts { display: grid; gap: 0; border-top: 1px solid #c2cec8; }
.support-contacts p { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 14px; margin: 0; padding: 17px 0; border-bottom: 1px solid #c2cec8; }
.support-contacts span { color: #66736e; font-size: 14px; font-weight: 720; }
.support-contacts a, .support-contacts em { font-style: normal; overflow-wrap: anywhere; }
.contact-channel-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 24px; }
.qq-consult-button {
  min-height: 42px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--blue);
  border-radius: 22px;
  background: var(--blue);
  color: #fff;
  font-size: 15px;
  font-weight: 750;
  transition: background-color .2s ease, border-color .2s ease;
}
.qq-consult-button:hover, .qq-consult-button:focus-visible { border-color: #0d566f; background: #0d566f; }
.qq-consult-button:focus-visible, .copy-contact-button:focus-visible, .requirement-entry a:focus-visible { outline: 3px solid rgba(23, 107, 135, .2); outline-offset: 3px; }
.qq-consult-button svg { width: 21px; height: 21px; flex: 0 0 21px; }
.copy-contact-button { padding: 8px 3px; border: 0; background: transparent; color: #526177; font: inherit; font-size: 14px; font-weight: 650; line-height: 1.4; cursor: pointer; }
.copy-contact-button:hover { color: var(--blue); }
.contact-response-note { min-height: 24px; margin: 8px 0 0; color: #6d7974; font-size: 13px; }
.requirement-entry { margin-top: 30px; padding-top: 24px; border-top: 1px solid #c2cec8; }
.requirement-entry p { margin-bottom: 10px; color: #526177; font-size: 14px; line-height: 1.7; }
.requirement-entry a { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); font-size: 16px; font-weight: 800; }
.requirement-entry a span { color: var(--blue); font-size: 20px; transition: transform .2s ease; }
.requirement-entry a:hover { color: var(--blue); }
.requirement-entry a:hover span { transform: translateX(3px); }
.breadcrumbs { margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.support-contact { background: #eef2ef; }
.support-contact-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(420px, .7fr); gap: 72px; align-items: start; }
.support-contact-copy h2 { margin-bottom: 18px; }
.support-form { display: grid; gap: 15px; padding: 28px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.field label { display: block; margin-bottom: 5px; color: #415066; font-size: 14px; font-weight: 700; }
.field input, .field textarea { width: 100%; min-width: 0; min-height: 44px; padding: 9px 11px; border: 1px solid #bcc8d2; border-radius: 6px; background: #fff; color: var(--ink); font: inherit; outline: none; }
.field textarea { min-height: 112px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23, 107, 135, .12); }
.consent { display: grid; grid-template-columns: auto 1fr; gap: 9px; align-items: start; color: var(--muted); font-size: 13px; }
.consent input { width: 16px; height: 16px; margin-top: 4px; accent-color: var(--blue); }
.consent a { color: var(--blue); text-decoration: underline; }
.support-form .btn { width: 100%; border: 0; cursor: pointer; }
.support-form .btn:disabled { opacity: .55; cursor: wait; }
.form-status { min-height: 24px; margin: 0; color: var(--muted); font-size: 14px; }
.form-status.ok { color: var(--green); }
.form-status.error { color: #a12b25; }
.btn.requirement-cta,
.btn.secondary.requirement-cta,
.contact-primary-cta.requirement-cta {
  border-color: var(--requirement-cta-border);
  background: var(--requirement-cta-bg);
  color: var(--requirement-cta-text);
}
.btn.requirement-cta:hover,
.btn.requirement-cta:focus-visible,
.btn.secondary.requirement-cta:hover,
.btn.secondary.requirement-cta:focus-visible,
.contact-primary-cta.requirement-cta:hover,
.contact-primary-cta.requirement-cta:focus-visible {
  border-color: var(--requirement-cta-border);
  background: var(--requirement-cta-hover);
  color: var(--requirement-cta-text);
}
footer { padding: 34px clamp(18px, 5vw, 72px); border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { width: min(1120px, 100%); margin: 0 auto; display: flex; justify-content: space-between; gap: 18px; }
@media (max-width: 820px) {
  .topbar { position: static; align-items: flex-start; flex-direction: column; padding-top: 16px; padding-bottom: 16px; }
  .nav { width: 100%; gap: 24px; overflow-x: auto; }
  .nav a { padding: 4px 0 8px; }
  .nav a::after { bottom: 3px; }
  .nav a.nav-cta { min-height: 34px; padding: 5px 12px; }
  .grid, .grid.two, .product-views, .product-cta-layout, .support-contact-layout, .support-contact > .wrap, .support-main-layout { grid-template-columns: 1fr; }
  .product-view img { height: 320px; }
  .product-cta-layout, .support-contact > .wrap { gap: 28px; }
  .support-main-layout { gap: 48px; }
  .product-cta .actions { justify-content: flex-start; }
  .footer-inner { flex-direction: column; }
  h1 { font-size: 42px; }
  h2 { font-size: 32px; }
}
@media (max-width: 560px) {
  .topbar { padding-right: 18px; padding-left: 18px; }
  .brand { font-size: 20px; }
  .brand-logo { width: 38px; height: 38px; flex-basis: 38px; }
  .nav { gap: 20px; font-size: 13px; }
  .nav a.nav-cta { padding-inline: 10px; }
  .hero { padding-top: 58px; padding-bottom: 52px; }
  h1 { font-size: 34px; }
  h2 { font-size: 28px; }
  main section { padding-top: 54px; padding-bottom: 54px; }
  .product-view img { height: 230px; }
  .support-main { padding-top: 52px; padding-bottom: 58px; }
  .support-faq-panel h1 { font-size: 34px; }
  .support-faq-panel h1, .support-contact-panel h2 { margin-bottom: 22px; }
  .support-contact-panel { padding: 40px 0 0; border-top: 1px solid #ccd4d0; border-left: 0; }
  .support-contact-panel h2 { min-height: 41px; }
  .faq-list summary { min-height: 68px; padding: 16px 8px; grid-template-columns: minmax(0, 1fr) 28px; gap: 14px; font-size: 17px; line-height: 1.65; }
  .faq-list summary::after { width: 26px; height: 26px; font-size: 18px; }
  .faq-list details p { margin-right: 42px; margin-left: 8px; padding-bottom: 20px; font-size: 15px; line-height: 1.8; }
  .support-contact { padding-top: 50px; padding-bottom: 50px; }
  .support-contacts p { grid-template-columns: 70px minmax(0, 1fr); gap: 10px; }
  .contact-channel-actions { margin-top: 22px; }
  .contact-hero { padding-top: 48px; padding-bottom: 46px; }
  .contact-hero h1 { font-size: 36px; line-height: 1.15; }
  .contact-hero-actions { align-items: flex-start; flex-direction: column; gap: 17px; }
  .contact-primary-cta { min-height: 48px; padding: 0 17px; font-size: 16px; }
  .contact-main { padding-top: 48px; padding-bottom: 58px; }
  .faq-guide .faq-hero { padding-top: 48px; padding-bottom: 46px; }
  .faq-guide-main { padding-top: 50px; padding-bottom: 60px; }
  .faq-guide-heading h2 { font-size: 30px; }
}