:root {
  --brand: #ffd14c;
  --brand-soft: #fff6d3;
  --forest: #294c38;
  --ink: #29332d;
  --muted: #727c74;
  --line: #e6ebe5;
  --paper: #fffef9;
  --leaf: #f0f5ed;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 112px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: DengXian, "等线", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.85; -webkit-font-smoothing: antialiased; }
a { color: var(--forest); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: #587646; }
a:focus-visible, summary:focus-visible { outline: 3px solid #8a6b0b; outline-offset: 5px; }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; width: 24px; height: 24px; flex-shrink: 0; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { color: var(--forest); font-weight: 600; }
h1 { font-size: 42px; line-height: 1.4; letter-spacing: -.025em; }
h2 { font-size: 25px; line-height: 1.5; letter-spacing: -.015em; }
h3 { font-size: 18px; line-height: 1.6; }
p + p { margin-top: 14px; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 100; background: var(--forest); color: #fff; padding: 10px 18px; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.97); border-bottom: 1px solid rgba(41,76,56,.07); }
.site-header-inner { max-width: 1248px; min-height: 88px; padding: 0 24px; margin: 0 auto; display: flex; align-items: center; gap: 28px; }
.brand { flex-shrink: 0; }
.brand img { width: 160px; }
.brand-divider { height: 24px; width: 1px; background: var(--line); }
.header-section { color: #747d74; font-size: 15px; text-decoration: none; }
.site-nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: 28px; align-items: center; }
.site-nav a { font-size: 14px; color: #626e64; text-decoration: none; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--forest); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; border: 1px solid transparent; border-radius: 40px; background: var(--brand); color: #3a361f; font-size: 15px; font-weight: 600; text-decoration: none; padding: 12px 28px; white-space: nowrap; transition: background .18s; }
.button:hover { background: #f7c334; color: #3a361f; }
.button-small { min-height: 42px; padding: 7px 24px; }
.button span { font-size: 18px; }
.button-secondary { border-color: var(--line); background: #fff; }
.help-hero { background: var(--paper); border-bottom: 1px solid var(--line); overflow: hidden; }
.help-hero-inner { max-width: 1200px; min-height: 367px; padding: 58px 0 46px; margin: auto; position: relative; }
.hero-copy { position: relative; z-index: 2; width: 51%; }
.hero-label { font-size: 14px; color: #75815f; margin-bottom: 17px; }
.help-hero h1 { font-size: 46px; line-height: 1.34; }
.hero-description { color: #6a766a; font-size: 17px; line-height: 1.95; margin-top: 20px; }
.hero-landscape { position: absolute; width: 660px; height: 360px; right: -35px; top: 2px; -webkit-mask-image: radial-gradient(ellipse 64% 74% at 53% 53%, #000 43%, transparent 74%); mask-image: radial-gradient(ellipse 64% 74% at 53% 53%, #000 43%, transparent 74%); }
.hero-landscape img { position: absolute; width: 100%; height: 100%; object-fit: cover; }
.hero-landscape .landscape-frame { opacity: .8; }
.hero-shortcuts { max-width: 1200px; margin: 0 auto; padding: 20px 0 23px; border-top: 1px solid #e9ebdc; display: flex; flex-wrap: wrap; gap: 18px 36px; align-items: center; font-size: 14px; }
.hero-shortcuts > span { color: var(--muted); margin-right: 6px; }
.hero-shortcuts a { text-decoration: none; }
.hero-shortcuts a:hover { text-decoration: underline; }
.help-main { max-width: 1200px; margin: auto; padding: 54px 0 64px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-heading > p { font-size: 14px; color: var(--muted); }
.topic-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); column-gap: 66px; }
.topic-link { display: flex; align-items: center; gap: 22px; padding: 28px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.topic-icon { width: 54px; height: 54px; background: var(--leaf); color: #64885c; display: grid; place-items: center; border-radius: 18px 18px 18px 6px; flex-shrink: 0; transition: background .18s; }
.topic-link:nth-child(3n+1) .topic-icon { background: #fff5cc; color: #8b752f; }
.topic-icon svg { width: 27px; height: 27px; }
.topic-copy { flex: 1; min-width: 0; }
.topic-copy h3 { margin-bottom: 5px; font-size: 19px; }
.topic-copy p { font-size: 14px; color: #687363; line-height: 1.8; }
.topic-arrow { flex-shrink: 0; color: #a1aea0; margin-left: 4px; transition: transform .18s, color .18s; }
.topic-arrow svg { width: 19px; height: 19px; }
.topic-link:hover .topic-arrow { transform: translateX(4px); color: var(--forest); }
.topic-link:hover .topic-icon { background: var(--brand-soft); }
.help-answers { margin-top: 62px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { list-style: none; cursor: pointer; color: var(--forest); padding: 20px 38px 20px 0; font-weight: 500; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 6px; top: 16px; color: #85917f; font-size: 23px; font-weight: 300; }
details[open] > summary::after { content: "−"; }
details > p { color: #657062; padding: 0 38px 24px 0; font-size: 15px; max-width: 850px; }
details > p a { margin-left: 8px; white-space: normal; }
.operation-guide { display: flex; align-items: center; gap: 24px; background: #f6f8f1; padding: 27px 32px; margin-top: 44px; border-radius: 12px; }
.guide-icon { color: #7b9669; }
.guide-icon svg { width: 33px; height: 33px; }
.operation-guide h2 { font-size: 19px; margin-bottom: 4px; }
.operation-guide p { font-size: 14px; color: var(--muted); }
.guide-link { font-size: 14px; margin-left: auto; text-decoration: none; flex-shrink: 0; }
.help-resources { display: flex; align-items: baseline; flex-wrap: wrap; gap: 24px 44px; margin-top: 35px; }
.help-resources h2 { font-size: 15px; font-weight: 500; color: var(--muted); }
.help-resources > div { display: flex; flex-wrap: wrap; gap: 12px 28px; }
.help-resources a { font-size: 13px; text-decoration: none; color: #697469; }
.help-resources a:hover { color: var(--forest); text-decoration: underline; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 11px; align-items: center; font-size: 13px; color: #8a9388; padding: 23px 0; }
.breadcrumb a { text-decoration: none; color: #7b8678; }
.docs-main { max-width: 1200px; margin: auto; padding-bottom: 72px; }
.docs-layout { display: grid; grid-template-columns: 205px minmax(0,1fr); gap: 65px; align-items: start; }
.docs-sidebar { position: sticky; top: 111px; padding-top: 24px; }
.sidebar-home { text-decoration: none; font-size: 19px; font-weight: 600; }
.docs-sidebar > p { font-size: 12px; color: #929b8d; margin: 28px 0 10px 13px; }
.docs-sidebar nav { display: flex; flex-direction: column; gap: 5px; }
.docs-sidebar nav a { padding: 9px 14px; text-decoration: none; color: #737f6c; border-radius: 7px; font-size: 14px; }
.docs-sidebar nav a:hover { background: #f5f7f0; color: var(--forest); }
.docs-sidebar nav a[aria-current="page"] { background: #fff5cd; color: #5f5830; font-weight: 600; }
.sidebar-contact { border-top: 1px solid var(--line); margin: 29px 13px 0; padding-top: 20px; display: flex; flex-direction: column; gap: 5px; }
.sidebar-contact span { font-size: 12px; color: #8a9484; }
.sidebar-contact a { text-decoration: none; font-size: 14px; }
.article-main { min-width: 0; max-width: 895px; }
.article-header { padding: 19px 0 30px; border-bottom: 1px solid var(--line); }
.article-header h1 { font-size: 36px; margin-bottom: 14px; }
.article-header > p { color: #677260; font-size: 16px; line-height: 1.95; max-width: 770px; }
.article-toc { display: flex; align-items: baseline; gap: 26px; margin: 23px 0 42px; font-size: 13px; }
.article-toc > span { flex-shrink: 0; color: #929b8a; }
.article-toc > div { display: flex; flex-wrap: wrap; gap: 7px 22px; }
.article-toc a { text-decoration: none; color: #657b5d; }
.article-toc a:hover { text-decoration: underline; }
.content-section { margin-bottom: 47px; scroll-margin-top: 0; }
.content-section > h2 { font-size: 24px; margin-bottom: 21px; }
.content-section > p { color: #626e5c; }
.section-intro { color: var(--muted); margin-top: -10px; margin-bottom: 22px; font-size: 15px; }
.card-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); column-gap: 34px; border-top: 1px solid var(--line); }
.info-card { border-bottom: 1px solid var(--line); padding: 23px 0; min-width: 0; }
.info-card h3 { margin-bottom: 9px; font-size: 18px; }
.info-card p { font-size: 14px; color: #68755f; line-height: 1.9; }
.info-card a { display: inline-block; font-size: 13px; margin-top: 12px; text-decoration: none; }
.info-card a:hover { text-decoration: underline; }
.steps { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 26px 34px; list-style: none; padding: 0; counter-reset: steps; }
.steps li { position: relative; border-left: 2px solid #ead48a; padding-left: 20px; }
.steps li::before { counter-increment: steps; content: "步骤 " counter(steps); display: block; color: #8c936f; font-size: 12px; margin-bottom: 6px; }
.steps h3 { margin-bottom: 8px; }
.steps p { font-size: 14px; color: #69755f; }
.note { background: #f7f8f2; border-left: 3px solid #dbca7d; padding: 20px 24px; margin-top: 23px; font-size: 14px; color: #6e785f; }
.note h3 { font-size: 16px; margin-bottom: 7px; }
.table-wrap { overflow-x: auto; margin-bottom: 20px; }
table { width: 100%; border-collapse: collapse; text-align: left; font-size: 15px; }
caption { text-align: left; color: #839074; font-size: 13px; padding-bottom: 14px; }
th, td { padding: 16px 20px; border-bottom: 1px solid var(--line); min-width: 112px; }
thead th { background: #faf7e8; color: #6d7155; font-weight: 500; }
tbody th { font-weight: 500; }
.plain-list { padding-left: 24px; color: #69765f; }
.plain-list li { margin: 8px 0; }
.source-note { background: #fafbf7; color: #89917e; border-top: 1px solid var(--line); padding: 20px 0; font-size: 12px; line-height: 2; }
.source-note a { color: #748365; }
.related-line { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; }
.start-grid { display: grid; grid-template-columns: minmax(0,1fr) 185px; gap: 40px; align-items: center; }
.start-grid p { color: #67735e; margin-top: 12px; }
.qr-card { text-align: center; padding: 18px; background: #fafbf6; border-radius: 10px; }
.qr-card img { width: 145px; height: auto; margin: auto; }
figcaption { color: #869078; font-size: 12px; margin-top: 9px; }
.action-links { display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 18px; }
.article-end { margin-top: 45px; padding-top: 27px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; font-size: 14px; }
.article-end a { text-decoration: none; }
.mobile-directory { display: none; }
.service-band { background: #fbf8e8; border-top: 1px solid #f0eddc; border-bottom: 1px solid #f0eddc; }
.service-band > div { max-width: 1200px; margin: auto; padding: 32px 0; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.service-copy h2 { font-size: 21px; margin-bottom: 5px; }
.service-copy p { font-size: 14px; color: #8a8b72; }
.service-links { display: flex; align-items: center; gap: 34px; }
.service-links a { text-decoration: none; font-size: 14px; }
.service-links .service-phone { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 600; white-space: nowrap; }
.service-phone svg { width: 20px; height: 20px; }
.site-footer { padding: 25px 24px 30px; font-size: 12px; color: #919889; background: #fff; }
.footer-inner { max-width: 1200px; margin: auto; display: grid; grid-template-columns: 1fr auto; column-gap: 40px; align-items: center; }
.footer-brand { width: 140px; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 25px; }
.site-footer a { text-decoration: none; color: inherit; }
.site-footer a:hover { color: var(--forest); }
.site-footer p { margin: 0; }
.site-footer .footer-inner p:last-child { text-align: right; }
.footer-separator { margin: 0 9px; color: #c3c8bc; }
/* Existing standalone error page uses the same visual foundation. */
.public-main { max-width: 1120px; margin: auto; padding: 28px 28px 72px; }
.page-hero { padding: 50px 0; }
.page-hero .eyebrow { color: var(--muted); margin-bottom: 18px; }
.resource-list li { margin-bottom: 8px; }
.contact-panel { padding: 28px; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; }
.contact-panel h2 { margin-bottom: 10px; }
.contact-panel p { color: var(--muted); }
.contact-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 22px; }
.site-footer > div:not(.footer-inner) { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px 24px; margin-bottom: 18px; }
.site-footer > p { text-align: center; margin-top: 8px; }
@media (max-width: 1279px) {
  .help-hero-inner, .hero-shortcuts, .help-main, .docs-main { margin-left: 40px; margin-right: 40px; }
  .service-band > div { padding-left: 40px; padding-right: 40px; }
  .hero-landscape { right: -60px; width: 58%; }
  .docs-layout { gap: 46px; grid-template-columns: 185px minmax(0,1fr); }
  .site-header-inner { padding-left: 40px; padding-right: 40px; }
  .topic-grid { column-gap: 44px; }
}
@media (max-width: 960px) {
  .docs-layout { display: block; }
  .docs-sidebar { display: none; }
  .article-main { max-width: none; }
  .article-header { padding-top: 26px; }
  .mobile-directory { display: block; border: 1px solid var(--line); border-radius: 8px; background: #fafbf7; }
  .mobile-directory summary { padding: 12px 42px 12px 18px; font-size: 14px; }
  .mobile-directory summary span { float: right; color: #89907f; font-size: 12px; }
  .mobile-directory summary::after { right: 15px; top: 6px; }
  .mobile-directory nav { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 2px 14px; padding: 2px 18px 17px; }
  .mobile-directory nav a { padding: 7px 0; font-size: 14px; text-decoration: none; }
  .mobile-directory nav a[aria-current="page"] { font-weight: 600; text-decoration: underline; text-decoration-color: #d3b34a; }
  .help-hero h1 { font-size: 40px; }
  .hero-copy { width: 55%; }
  .hero-landscape { right: -80px; width: 59%; }
  .topic-grid { column-gap: 32px; }
  .topic-link { gap: 16px; }
  .service-links { gap: 22px; }
  .service-links .service-phone { font-size: 18px; }
  .footer-inner { column-gap: 20px; }
}
@media (max-width: 640px) {
  html { scroll-padding-top: 87px; }
  body { font-size: 15px; }
  .site-header-inner { min-height: 72px; padding: 0 20px; gap: 15px; }
  .brand img { width: 128px; }
  .brand-divider, .header-section, .site-nav { display: none; }
  .site-header-inner > .button { margin-left: auto; }
  .button-small { min-height: 36px; font-size: 13px; padding: 5px 17px; gap: 14px; }
  .help-hero-inner, .hero-shortcuts, .help-main, .docs-main { margin-left: 24px; margin-right: 24px; }
  .help-hero-inner { min-height: 400px; padding-top: 33px; padding-bottom: 170px; }
  .hero-copy { width: 100%; }
  .hero-label { font-size: 12px; margin-bottom: 12px; }
  .help-hero h1 { font-size: 34px; line-height: 1.4; }
  .hero-description { font-size: 14px; margin-top: 16px; }
  .hero-landscape { top: auto; bottom: -22px; right: -65px; width: 360px; height: 202px; -webkit-mask-image: radial-gradient(ellipse 70% 70% at 53% 52%, #000 40%, transparent 72%); mask-image: radial-gradient(ellipse 70% 70% at 53% 52%, #000 40%, transparent 72%); }
  .hero-shortcuts { gap: 10px 24px; padding-top: 18px; padding-bottom: 20px; font-size: 12px; }
  .hero-shortcuts > span { width: 100%; font-size: 11px; }
  .help-main { padding: 35px 0 40px; }
  h2, .section-heading h2 { font-size: 22px; }
  .section-heading { display: block; margin-bottom: 11px; }
  .section-heading > p { font-size: 12px; margin-top: 6px; }
  .topic-grid { grid-template-columns: minmax(0,1fr); }
  .topic-link { gap: 17px; padding: 23px 0; }
  .topic-icon { width: 47px; height: 47px; border-radius: 15px 15px 15px 5px; }
  .topic-icon svg { width: 24px; height: 24px; }
  .topic-copy h3 { font-size: 17px; margin-bottom: 4px; }
  .topic-copy p { font-size: 12px; line-height: 1.85; }
  .topic-arrow { margin-left: 0; }
  .topic-arrow svg { width: 17px; height: 17px; }
  .help-answers { margin-top: 39px; }
  .help-answers .section-heading { margin-bottom: 18px; }
  summary { font-size: 14px; padding: 18px 27px 18px 0; }
  summary::after { font-size: 20px; top: 15px; }
  details > p { font-size: 13px; padding: 0 20px 21px 0; }
  .operation-guide { flex-wrap: wrap; padding: 23px; gap: 15px; margin-top: 32px; }
  .guide-icon svg { width: 25px; height: 25px; }
  .operation-guide > div { flex: 1; min-width: 190px; }
  .operation-guide h2 { font-size: 16px; }
  .operation-guide p { font-size: 12px; }
  .guide-link { margin: 0 0 0 40px; font-size: 12px; }
  .help-resources { display: block; margin-top: 28px; }
  .help-resources h2 { font-size: 13px; margin-bottom: 13px; }
  .help-resources > div { gap: 10px 20px; }
  .help-resources a { font-size: 12px; }
  .breadcrumb { padding: 19px 0; gap: 8px; font-size: 11px; }
  .docs-main { padding-bottom: 42px; }
  .article-header { padding: 25px 0; }
  .article-header h1 { font-size: 29px; margin-bottom: 12px; }
  .article-header > p { font-size: 14px; }
  .article-toc { display: block; margin: 20px 0 31px; font-size: 12px; }
  .article-toc > span { display: block; margin-bottom: 9px; }
  .article-toc > div { gap: 7px 17px; }
  .content-section { margin-bottom: 35px; scroll-margin-top: 0; }
  .content-section > h2 { font-size: 21px; margin-bottom: 18px; }
  .section-intro, .content-section > p { font-size: 14px; }
  .card-grid, .steps { grid-template-columns: minmax(0,1fr); }
  .info-card { padding: 21px 0; }
  .info-card h3 { font-size: 17px; }
  .info-card p, .steps p { font-size: 13px; }
  .steps { gap: 22px; }
  .steps h3 { font-size: 17px; }
  th, td { padding: 13px 12px; min-width: 96px; font-size: 13px; }
  .note { padding: 17px 19px; font-size: 13px; }
  .source-note { font-size: 11px; }
  .start-grid { grid-template-columns: minmax(0,1fr); gap: 23px; }
  .qr-card { justify-self: start; }
  .action-links .button { padding: 9px 22px; font-size: 13px; }
  .article-end { margin-top: 32px; padding-top: 23px; font-size: 12px; }
  .service-band > div { display: block; padding: 27px 24px; }
  .service-copy h2 { font-size: 18px; }
  .service-copy p { font-size: 12px; }
  .service-links { margin-top: 19px; justify-content: space-between; gap: 18px; }
  .service-links .service-phone { font-size: 19px; }
  .service-links > a { font-size: 12px; }
  .site-footer { padding: 15px 24px 26px; font-size: 10px; }
  .footer-inner { display: block; }
  .footer-brand { display: block; width: 128px; margin-bottom: 10px; }
  .site-footer nav { justify-content: flex-start; gap: 9px 18px; font-size: 11px; margin-bottom: 22px; }
  .site-footer p { line-height: 1.9; }
  .site-footer .footer-inner p:last-child { text-align: left; margin-top: 5px; }
  .public-main { padding-left: 24px; padding-right: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}