/* 从零建立的官网基础层。产品控制台不加载本文件。 */
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--site-bg); scroll-padding-top: var(--site-header-height); }
body { margin: 0; color: var(--site-text); background: var(--site-bg); font: 400 16px/var(--site-body-line) var(--site-font-body); }
::selection { background: var(--site-selection-bg); color: var(--site-selection-text); }
[hidden] { display: none !important; }
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
b, strong { font-weight: 600; }
h1, h2, h3, h4 { font-family: var(--site-font-heading); overflow-wrap: anywhere; }
h1, h2 { font-size: clamp(28px, 2.5vw, 40px); line-height: var(--site-heading-line); letter-spacing: var(--site-heading-track); font-weight: 600; }
h3 { font-size: 20px; line-height: 1.5; font-weight: 600; }
h4 { font-size: 16px; }
a { color: var(--site-link); text-underline-offset: .2em; }
a:hover { color: var(--site-link-hover); }
button, input, textarea, select { font: inherit; }
button, a, input, textarea { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .65; }
button, .site-button { min-height: 44px; padding: 10px 20px; border: 1px solid transparent; border-radius: var(--site-radius); background: var(--site-button-bg); color: var(--site-button-text); font-weight: 600; }
.site-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; text-align: center; text-decoration: none; }
button:hover:not(:disabled), .site-button:hover { color: var(--site-button-text); background: var(--site-white); }
.site-button-accent { color: var(--site-orange-ink); }
.site-button-accent:hover { color: var(--site-orange-ink); }
input:not([type=checkbox],[type=radio],[type=range]), textarea, select { width: 100%; min-width: 0; min-height: 44px; padding: 12px 16px; color: var(--site-text); background: var(--site-surface); border: 1px solid var(--site-input-line); border-radius: var(--site-radius); }
input::placeholder, textarea::placeholder { color: var(--site-placeholder); opacity: 1; }
input:hover, textarea:hover { background: var(--site-surface-hover); }
input:not([type=checkbox],[type=radio],[type=range]):focus, textarea:focus, select:focus { border-color: var(--site-teal); outline: none; box-shadow: none; }
input[type=checkbox], input[type=radio] { accent-color: var(--site-teal); width: 20px; height: 20px; flex-shrink: 0; }
input[aria-invalid=true], textarea[aria-invalid=true] { border-color: var(--site-danger); }
:focus-visible { outline: 3px solid var(--site-focus); outline-offset: 4px; }
img, video, svg { max-width: 100%; }
img { height: auto; }
figcaption { color: var(--site-blue-190); }
svg { fill: none; stroke: currentColor; stroke-width: 2; }
.sr-only, .site-honeypot { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; inset: 8px auto auto 8px; z-index: 100; transform: translateY(-200%); padding: 10px 16px; background: var(--site-button-bg); color: var(--site-button-text); }
.skip-link:focus { transform: none; }
.site-header { position: fixed; z-index: 20; inset-block-start: var(--site-header-offset); inset-inline: 0; width: min(calc(100% - 2 * var(--site-gutter)), var(--site-content-max)); margin-inline: auto; height: 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; background: transparent; pointer-events: none; }
.site-header > * { pointer-events: auto; }
.site-nav-toggle { display: none; }
.site-logo { display: inline-flex; align-items: center; flex-shrink: 0; }
.site-logo img { width: 118px; height: 20px; object-fit: contain; }
.site-account { display: flex; align-items: center; gap: 20px; }
#top-plan { font-size: 14px; color: var(--site-muted); }
.site-signin { display: inline-flex; height: 32px; min-height: 32px; align-items: center; padding: 4px 16px; border: 1px solid var(--site-teal); border-radius: var(--site-radius); font-size: 14px; text-decoration: none; }
.site-nav { position: fixed; z-index: 15; inset-block-start: calc(var(--site-header-offset) + 56px); inset-inline-start: max(var(--site-gutter), calc((100vw - var(--site-content-max)) / 2)); width: calc(var(--site-rail) - 32px); display: grid; gap: 8px; }
.site-nav a { position: relative; min-height: 44px; display: flex; align-items: center; padding: 8px 12px; color: var(--site-text); text-decoration: none; border-inline-start: 4px solid transparent; line-height: 1.5; }
.site-nav a::before { content: ""; position: absolute; inset-inline-start: -4px; top: 50%; width: 4px; height: 1em; transform: translateY(-50%); border-radius: 2px; background: transparent; }
.site-nav a:hover { color: var(--site-teal-light); }
.site-nav a[aria-current]::before { background: var(--site-teal); }
.site-frame { max-width: var(--site-content-max); width: calc(100% - 2 * var(--site-gutter)); margin-inline: auto; padding-inline-start: var(--site-rail); }
/* 上下留白对称，让内容中心落在完整视口的中心；header 不参与居中计算。 */
.site-screen { min-height: 100svh; padding-block: 64px; display: grid; align-content: center; scroll-margin-top: 0; }
.site-split { display: grid; grid-template-columns: minmax(0, 3fr) minmax(240px, 1.8fr); align-items: center; gap: 40px; }
.site-copy, .site-stack { min-width: 0; }
.site-stack { display: grid; gap: 40px; }
.site-stack > header, .site-page-heading { display: grid; gap: 24px; }
.site-lead { font-size: 18px; line-height: 1.7; color: var(--site-warm-240); }
.site-copy > .site-lead { margin-block-start: 44px; }
.site-prose { display: grid; gap: 24px; overflow-wrap: anywhere; }
.site-copy .site-prose { margin-block-start: 40px; }
.site-portrait { display: grid; justify-items: center; gap: 20px; align-self: center; color: var(--site-muted); text-align: center; }
/* 侧栏占满正文高度；一屏高的粘性容器在边界前一屏自然释放。 */
.site-portrait-layout { position: relative; }
.site-portrait-rail { position: absolute; inset: 0 0 0 auto; width: calc((100% - 40px) * .375); pointer-events: none; }
.site-portrait-pin { position: sticky; top: 0; height: 100svh; display: grid; align-content: center; }
.site-portrait-stage { position: relative; width: 100%; aspect-ratio: 1; color: var(--site-text); }
.site-portrait-art, .site-portrait-fallback { display: block; width: 100%; height: 100%; position: absolute; inset: 0; }
.site-portrait-fallback { inset: 16px; margin: auto; width: calc(100% - 32px); height: calc(100% - 32px); max-width: 300px; max-height: 300px; object-fit: contain; }
.site-portrait-art { visibility: hidden; }
.site-portrait-stage.is-ready .site-portrait-art { visibility: visible; }
.site-portrait-stage.is-ready .site-portrait-fallback { visibility: hidden; }
.site-portrait figcaption { max-width: 290px; }
.site-small { color: var(--site-muted); font-size: 13px; }
.site-kicker { font-size: 16px; line-height: 22px; color: var(--site-muted); margin-block-end: 10px; }
.site-intake { display: grid; gap: 10px; max-width: 100%; }
.site-copy > .site-intake { margin-block-start: 80px; }
.site-intake h2 { font-size: 24px; letter-spacing: 0; }
.site-intake > p { font-size: 14px; }
.site-brand-form { display: flex; width: min(360px, 100%); height: 40px; margin-block-start: 30px; border: 1px solid var(--site-input-line); border-radius: var(--site-radius); background: var(--site-surface-hover); overflow: hidden; }
.site-brand-form input { min-height: 0; height: 100%; padding: 8px 15px; border: 0; border-radius: 0; background: transparent; color: var(--site-text); font-size: 16px; }
.site-brand-form button { display: grid; place-items: center; width: 50px; height: 100%; min-height: 0; padding: 8px; flex-shrink: 0; border: 0; border-radius: 0; color: var(--site-text); background: var(--site-input-line); }
.site-brand-form button:hover { background: var(--site-teal); color: var(--site-text); }
.site-brand-form input::placeholder,
.site-brand-form input:is(:hover, :focus)::placeholder { color: var(--site-placeholder); }
.site-brand-form:focus-within { border-color: var(--site-teal); }
.site-brand-form:focus-within button { background: var(--site-teal); color: var(--site-text); }
.site-brand-form svg { width: 24px; height: 24px; }
.site-page { padding-block: calc(var(--site-header-height) + 16px) 80px; min-height: calc(100svh - 220px); }
.site-page-heading { margin-block-end: 48px; }
.site-footer { width: min(calc(100% - 2 * var(--site-gutter)), var(--site-content-max)); margin-inline: auto; padding: 40px 0 80px var(--site-rail); scroll-snap-align: none; }
.site-footer-panel { position: relative; isolation: isolate; overflow: hidden; display: grid; grid-template-columns: 260px 140px minmax(160px, 1fr); gap: 40px; min-height: 260px; padding: 32px 40px; background: var(--site-surface); border-radius: var(--site-radius); }
.site-footer-panel > a, .site-footer-panel > nav { position: relative; z-index: 1; align-self: start; }
.site-footer-panel .site-logo img { width: 118px; height: 20px; }
.site-footer-panel nav { display: grid; align-content: start; gap: 14px; font-size: 14px; }
.site-footer-panel a { text-decoration: none; color: var(--site-text); }
.site-footer-panel a:hover { color: var(--site-link-hover); }
.site-footer-art { position: absolute; inset: auto 0 0 auto; z-index: 0; width: 424px; height: 260px; max-width: 50%; aspect-ratio: 1832 / 1124; background: var(--site-blue-100); -webkit-mask: var(--site-footer-art-mask) right bottom / contain no-repeat; mask: var(--site-footer-art-mask) right bottom / contain no-repeat; pointer-events: none; }
@media (min-width: 1000px) {
  .site-footer-art { height: 100%; width: auto; -webkit-mask-size: cover; mask-size: cover; }
}
.site-footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; padding: 24px 40px 0; font-size: 14px; line-height: 20px; }
.site-language-picker { position: relative; justify-self: end; }
.site-language-picker > summary { display: flex; align-items: center; gap: 8px; min-height: 20px; color: var(--site-text); cursor: pointer; list-style: none; }
.site-language-picker > summary::marker { content: ''; }
.site-language-picker > summary::-webkit-details-marker { display: none; }
.site-language-dot { width: 6px; height: 6px; flex-shrink: 0; border-radius: 50%; background: var(--site-teal); }
.site-language-picker .site-languages { position: absolute; inset: calc(100% + 10px) 0 auto auto; display: flex; gap: 16px; padding: 0; white-space: nowrap; background: transparent; border: 0; z-index: 5; }
.site-language-picker:not([open]) .site-languages { display: none; }
.site-languages a { padding: 0; border: 0; color: var(--site-warm-250); text-decoration: none; }
.site-languages a:hover, .site-languages a:focus-visible { color: var(--site-teal); }
.site-user { position: relative; }
.site-avatar { border-radius: 50%; width: 40px; min-height: 40px; height: 40px; padding: 0; overflow: hidden; background: #8CA5BE; color: #FFFAF5; border-color: transparent; }
#uc-av, #uc-av img { display: block; width: 100%; height: 100%; object-fit: cover; }
#uc-av.is-letter { display: grid; place-items: center; background: #8CA5BE; color: #FFFAF5; }
.site-avatar:hover:not(:disabled) { background: #8CA5BE; color: #FFFAF5; border-color: #78C8C8; }
.site-account-menu { position: absolute; inset-inline-end: 0; inset-block-start: calc(100% + 12px); width: min(220px, calc(100vw - 40px)); max-height: 75svh; overflow-y: auto; background: var(--site-bg); border: 1px solid var(--site-input-line); border-radius: var(--site-radius); padding: 12px; }
.site-account-menu a, .site-account-menu button { display: flex; align-items: center; justify-content: flex-start; gap: 8px; width: 100%; min-height: 44px; padding: 8px; color: var(--site-text); background: transparent; text-decoration: none; border: 0; font-size: 14px; text-align: start; }
.site-account-menu a:hover, .site-account-menu button:hover { color: var(--site-text); background: var(--site-surface); }
.site-account-menu svg { width: 22px; height: 22px; flex-shrink: 0; }
.site-account-identity { display: grid; overflow-wrap: anywhere; padding: 8px; }
.site-account-separator { margin-block: 8px; border-block-start: 1px solid var(--site-line); }
.site-account-identity span, .acct-org-role { font-size: 12px; color: var(--site-muted); }
.acct-org-item { display: flex; gap: 8px; align-items: center; padding: 8px; font-size: 14px; }
.acct-org-name { flex: 1; overflow-wrap: anywhere; }
.site-dialog { margin: auto; width: min(520px, calc(100vw - 40px)); max-height: calc(100svh - 40px); overflow: auto; padding: 40px; border: 1px solid var(--site-input-line); border-radius: var(--site-radius); background: var(--site-bg); color: var(--site-text); }
.site-dialog::backdrop { background: var(--site-overlay); }
.site-dialog h2 { font-size: 24px; margin-block-end: 20px; }
.site-dialog p { margin-block: 16px; }
.site-dialog-close { float: inline-end; margin: -24px -24px 4px 8px; min-width: 44px; padding: 4px; font-size: 24px; color: var(--site-text); background: transparent; }
.site-dialog form { display: grid; gap: 16px; }
.site-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 16px; }
.site-toast { position: fixed; z-index: 80; inset: 50% auto auto 50%; transform: translate(-50%, -50%); width: max-content; max-width: min(420px, calc(100% - 48px)); padding: 16px 24px; background: #2d3237; background: rgba(45, 50, 55, .92); color: #fff; border-radius: var(--site-radius); text-align: center; overflow-wrap: anywhere; pointer-events: none; display: none; }
.site-toast.on, .site-toast:not([hidden])[id=contact-loading-toast] { display: block; }
.site-field-error, .err { color: var(--site-danger); }
.site-notice { padding: 12px 16px; border-radius: var(--site-radius); background: var(--site-surface-hover); color: var(--site-text); font-size: 13px; }
.site-cookie { position: fixed; z-index: 70; inset: auto 24px 24px 24px; margin-inline: auto; max-width: 720px; display: flex; align-items: center; gap: 24px; padding: 20px; border: 1px solid var(--site-input-line); background: var(--site-bg); border-radius: var(--site-radius); font-size: 14px; }
.site-cookie button { flex-shrink: 0; }
@media (min-width: 1100px) and (min-height: 700px) {
  html.site-snap { scroll-snap-type: y mandatory; scroll-padding-block-start: 0; }
  .site-snap .site-screen { scroll-snap-align: start; }
  html.site-snap.site-free-scroll { scroll-snap-type: none; }
}
@media (max-width: 1099px) {
  :root { --site-header-height: 88px; --site-rail: 0px; }
  .site-header { position: relative; inset-block-start: 0; min-height: 72px; height: auto; padding-block: 20px; }
  .site-nav { position: relative; inset: auto; width: calc(100% - 2 * var(--site-gutter)); margin-inline: auto; display: flex; flex-wrap: wrap; gap: 4px 12px; }
  .site-nav a { padding-inline: 8px; border-inline-start: 0; border-block-end: 3px solid transparent; }
  .site-nav a::before { display: none; }
  .site-nav a[aria-current] { border-block-end-color: var(--site-teal); }
  .site-screen { min-height: auto; padding-block: 64px; }
  .site-page { padding-block: 48px 64px; }
  .site-split { grid-template-columns: minmax(0, 3fr) minmax(200px, 1.5fr); gap: 32px; }
  .site-portrait-rail { width: calc((100% - 32px) / 3); }
  .site-copy > .site-intake { margin-block-start: 48px; }
}
@media (min-width: 760px) and (max-width: 1099px) {
  .site-header { flex-wrap: wrap; }
  .site-header > .site-logo { order: 1; }
  .site-header > .site-account { order: 2; }
  .site-header > .site-nav { order: 3; flex-basis: 100%; width: 100%; }
}
@media (max-width: 759px) {
  :root { --site-header-height: 72px; }
  .site-body { padding-block-start: var(--site-header-height); }
  .site-header { position: fixed; z-index: 40; inset: 0 0 auto; width: 100%; height: var(--site-header-height); min-height: 0; padding: 12px var(--site-gutter); display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 8px; background: var(--site-bg); border-block-end: 1px solid var(--site-line); }
  .site-header > .site-logo { grid-column: 2; grid-row: 1; justify-self: center; }
  .site-account { grid-column: 3; grid-row: 1; justify-self: end; gap: 12px; }
  .site-signin { min-height: 32px; padding-inline: 10px; white-space: nowrap; }
  .site-nav-toggle:not([hidden]) { display: grid; place-items: center; grid-column: 1; grid-row: 1; justify-self: start; width: 32px; height: 32px; min-height: 32px; padding: 5px; background: transparent; color: var(--site-text); border: 1px solid var(--site-input-line); }
  .site-nav-toggle:hover, .site-nav-toggle[aria-expanded=true] { background: var(--site-surface-hover); color: var(--site-white); }
  #site-primary-nav[data-mobile-open] { position: fixed; z-index: 35; inset: var(--site-header-height) 0 auto; width: 100%; margin: 0; padding: 12px var(--site-gutter) 20px; display: grid; gap: 4px; max-height: calc(100svh - var(--site-header-height)); overflow-y: auto; background: var(--site-bg); border-block-end: 1px solid var(--site-input-line); }
  #site-primary-nav[data-mobile-open=false] { display: none; }
  #site-primary-nav a { border-block-end: 0; border-inline-start: 4px solid transparent; }
  #site-primary-nav a::before { display: block; }
  /* 未加载 JS 时保留可直接访问的导航链接。 */
  .site-body:has(#site-nav-toggle[hidden]) { padding-block-start: 0; }
  .site-header:has(#site-nav-toggle[hidden]) { position: relative; height: auto; }
  #site-primary-nav:not([data-mobile-open]) { grid-column: 1 / -1; grid-row: 2; width: 100%; }
  #top-plan { display: none; }
  .site-nav { font-size: 14px; }
  .site-split { grid-template-columns: minmax(0, 1fr); }
  .site-portrait, .site-portrait-rail { display: none; }
  .site-screen { padding-block: 40px; }
  .site-stack { gap: 28px; }
  .site-copy > .site-lead { margin-block-start: 24px; }
  .site-intake { max-width: none; }
  .site-brand-form { margin-block-start: 16px; }
  .site-lead { font-size: 16px; }
  .site-footer { padding-block: 32px 80px; }
  .site-footer-panel { grid-template-columns: 1fr 1fr; gap: 28px; padding: 28px; }
  .site-footer-panel > .site-logo { grid-column: 1 / -1; }
  .site-footer-art { max-width: 60%; }
  .site-footer-bottom { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; padding-inline: 0; font-size: 12px; }
  .site-language-picker { white-space: nowrap; }
  .site-footer-panel nav { gap: 12px; }
  .site-cookie { inset-inline: 12px; inset-block-end: 12px; flex-wrap: wrap; gap: 12px; }
  .site-dialog { padding: 28px; }
  .site-dialog-close { margin: -12px -12px 0 8px; }
}
@media (max-width: 359px) {
  .site-header { padding-inline: 12px; }
  .site-header > .site-logo img { width: 100px; height: auto; }
  .site-signin { padding-inline: 6px; font-size: 13px; }
}
/* accessibility signals: Toast 使用深色半透明底，不依赖背景模糊；辅助偏好下使用不透明底。 */
@media (prefers-reduced-motion: reduce) {
  html.site-root { scroll-behavior: auto; scroll-snap-type: none; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (prefers-reduced-transparency: reduce) { .site-dialog::backdrop { background: var(--site-bg); } }
@media (prefers-reduced-transparency: reduce) { .site-toast { background: #2d3237; } }
@media (prefers-contrast: more) {
  :root { --site-muted: var(--site-white); --site-line: var(--site-blue-220); --site-input-line: var(--site-white); }
  .site-toast { background: #2d3237; }
}
input:hover::placeholder, textarea:hover::placeholder { color: var(--site-text); }