:root {
  color-scheme: dark;
  --background: #081726;
  --surface: #102437;
  --surface-hover: #173149;
  --text: #f1f6fa;
  --muted: #a8bacb;
  --subtle: #839cb0;
  --accent: #66c5e8;
  --button-text: #081726;
  --border: #253c50;
  --header: #081726f2;
  --font: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --mono: 'Cascadia Code', 'Consolas', monospace;
  --radius: 12px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}
[data-theme='light'] {
  color-scheme: light;
  --background: #f5f8fb;
  --surface: #eaf1f6;
  --surface-hover: #deeaf2;
  --text: #142c43;
  --muted: #4b6275;
  --subtle: #526b80;
  --accent: #176480;
  --button-text: #f1f6fa;
  --border: #c9d8e4;
  --header: #f5f8fbf2;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--background); color: var(--text); font-family: var(--font); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
button, a, .solution-panel { outline-offset: 5px; }
:focus-visible { outline: 2px solid var(--accent); }
button { color: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p, figure { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
[hidden] { display: none !important; }
::selection { background: var(--accent); color: var(--button-text); }
.container { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }
.section { padding-top: 104px; padding-bottom: 16px; }
.section-heading { margin-bottom: 40px; }
.section-heading h2, .about-section h2, .contact-section h2 { font-size: clamp(28px, 3vw, 40px); font-weight: 650; letter-spacing: -.04em; line-height: 1.4; }
.section-heading > p:not(.eyebrow) { max-width: 64ch; margin-top: 14px; color: var(--muted); }
.eyebrow { color: var(--accent); font-size: 14px; font-weight: 550; letter-spacing: .075em; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 24px; padding: 15px 24px; min-height: 52px; border: 1px solid var(--accent); border-radius: 6px; background: var(--accent); color: var(--button-text); font-weight: 600; white-space: nowrap; transition: transform 180ms var(--ease), opacity 180ms var(--ease); }
.button:hover { opacity: .88; transform: translateY(-2px); }
.button:active { transform: translateY(1px); }
.button-small { min-height: 42px; padding: 9px 18px; font-size: 14px; }
.text-link { display: inline-flex; align-items: center; gap: 18px; min-height: 44px; padding: 6px 0; border: 0; background: none; color: var(--accent); font-weight: 550; }
.text-link:hover { text-decoration: underline; text-underline-offset: 6px; }
.skip-link { position: fixed; top: 10px; left: 16px; z-index: 60; transform: translateY(-200%); background: var(--accent); color: var(--button-text); padding: 8px 16px; border-radius: 6px; }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 20; background: var(--header); border-bottom: 1px solid var(--border); }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 40px; }
.brand { display: flex; align-items: center; gap: 17px; flex-shrink: 0; }
.brand strong { font-size: 26px; font-weight: 750; letter-spacing: -.06em; }
.brand strong span { color: var(--accent); }
.brand-cn { border-left: 1px solid var(--border); padding-left: 17px; font-size: 14px; font-weight: 600; letter-spacing: .09em; }
.desktop-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; white-space: nowrap; }
.desktop-nav a { color: var(--muted); font-size: 14px; padding: 12px 0; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.utility-button { border: 0; background: none; width: 44px; height: 44px; display: grid; place-items: center; }
.utility-button:hover { background: var(--surface); border-radius: 6px; color: var(--accent); }
.language-toggle { font-size: 13px; font-weight: 650; }
.theme-toggle { font-size: 22px; }
.menu-toggle { display: none; position: relative; padding: 13px 10px; gap: 6px; }
.menu-toggle span { display: block; width: 22px; height: 1.5px; background: var(--text); }
.menu-toggle[aria-expanded='true'] span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded='true'] span:last-child { transform: translateY(-4px) rotate(-45deg); }
.mobile-nav { position: absolute; top: 100%; left: 0; right: 0; background: var(--background); padding: 16px 24px 24px; border-bottom: 1px solid var(--border); box-shadow: 0 12px 24px #08172620; }
.mobile-nav a { display: block; padding: 13px 0; }
.hero { position: relative; isolation: isolate; display: grid; grid-template-columns: 1.02fr 1fr; align-items: center; gap: 24px; min-height: 616px; padding-block: 56px; }
.hero-copy { position: relative; z-index: 1; }
.hero h1 { margin-top: 25px; font-size: clamp(40px, 4.45vw, 64px); line-height: 1.35; font-weight: 650; letter-spacing: -.055em; }
.hero-description { margin-top: 24px; max-width: 450px; color: var(--muted); line-height: 1.95; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 30px; margin-top: 34px; }
.hero-visual { position: relative; min-width: 0; }
.hero-visual img { aspect-ratio: 1.22; width: 100%; height: auto; object-fit: cover; object-position: 64% center; border-radius: var(--radius); }
.hero-visual figcaption { text-align: right; margin-top: 8px; color: var(--subtle); font-size: 11px; }
.hero:after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px; background: var(--border); }
.solution-workspace { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 24px; }
.solution-tabs { display: flex; flex-direction: column; gap: 8px; }
.solution-tabs button { display: flex; align-items: center; gap: 18px; min-height: 76px; text-align: left; padding: 14px 22px; border: 1px solid transparent; border-radius: 8px; background: none; transition: background 180ms var(--ease), border-color 180ms var(--ease); }
.solution-tabs button:hover { background: var(--surface); }
.solution-tabs button[aria-selected='true'] { border-color: var(--border); background: var(--surface); }
.tab-mark { width: 24px; text-align: center; font-size: 24px; font-family: var(--font); color: var(--subtle); }
.solution-tabs button[aria-selected='true'] .tab-mark { color: var(--accent); }
.solution-tabs strong { display: block; font-size: 17px; font-weight: 550; }
.solution-tabs small { display: block; margin-top: 1px; font-size: 12px; color: var(--muted); }
.tab-arrow { color: var(--accent); opacity: 0; margin-left: auto; }
.solution-tabs button[aria-selected='true'] .tab-arrow { opacity: 1; }
.solution-panel { padding: 34px 42px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; align-items: flex-start; min-height: 496px; }
.panel-topline { width: 100%; display: flex; justify-content: space-between; gap: 12px; color: var(--accent); font-size: 13px; }
.panel-topline span:last-child { color: var(--subtle); }
.panel-main { margin-top: 34px; }
.panel-main h3 { font-size: 29px; font-weight: 600; letter-spacing: -.02em; }
.panel-main p { margin-top: 15px; color: var(--muted); max-width: 57ch; }
.scope-block { margin-top: 30px; }
.scope-block h4, .application-block h4 { font-size: 13px; font-weight: 500; color: var(--subtle); }
.scope-block ul { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; padding: 0; margin: 10px 0 0; }
.scope-block li { color: var(--text); background: var(--background); border: 1px solid var(--border); padding: 6px 12px; border-radius: 4px; font-size: 13px; }
.application-block { margin-top: 22px; }
.application-block p { margin-top: 7px; font-size: 14px; }
.solution-note { font-size: 12px; margin-top: 20px; color: var(--muted); max-width: 68ch; }
.solution-panel .text-link { margin-top: auto; padding-top: 20px; }
.application-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; }
.application-grid article { padding-top: 20px; border-top: 1px solid var(--border); }
.application-symbol { display: block; font-size: 32px; line-height: 1; color: var(--accent); margin-bottom: 25px; }
.application-grid h3 { font-size: 19px; font-weight: 550; }
.application-grid p { color: var(--muted); margin-top: 12px; font-size: 14px; max-width: 25ch; }
.section-note { color: var(--subtle); font-size: 12px; margin-top: 28px; }
.process-list { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); list-style: none; margin: 0; padding: 0; gap: 0; }
.process-list li { padding: 12px 24px 0; border-left: 1px solid var(--border); }
.process-list li:first-child { padding-left: 0; border: 0; }
.process-index { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.process-list h3 { margin-top: 22px; font-size: 18px; font-weight: 550; }
.process-list p { font-size: 14px; color: var(--muted); margin-top: 12px; }
.about-section { display: grid; grid-template-columns: 1fr 1.2fr; gap: 72px; margin-top: 80px; padding-top: 56px; padding-bottom: 56px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.about-lead { margin-top: 16px; color: var(--muted); }
.about-body > p { color: var(--muted); }
.about-body > p + p { margin-top: 16px; }
.company-facts { display: flex; gap: 72px; padding: 0; margin: 28px 0 0; }
.company-facts dt { font-size: 12px; color: var(--subtle); }
.company-facts dd { margin: 6px 0 0; font-size: 18px; font-weight: 550; }
.resources-section { padding-top: 72px; }
.resource-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.resource-list article { display: flex; gap: 16px; justify-content: space-between; align-items: center; padding: 24px 28px; border: 1px solid var(--border); border-radius: var(--radius); }
.resource-list article > div { min-width: 0; }
.resource-list h3 { font-size: 18px; font-weight: 550; }
.resource-list p { margin-top: 6px; color: var(--muted); font-size: 14px; }
.resource-button { display: flex; gap: 16px; align-items: center; border: 0; background: none; color: var(--accent); font-size: 14px; flex-shrink: 0; min-height: 44px; padding: 4px; }
.resource-button:hover { text-decoration: underline; text-underline-offset: 6px; }
.contact-section { display: grid; grid-template-columns: 1fr 252px; gap: 64px; align-items: center; padding-block: 56px; margin-top: 88px; }
.contact-section > .contact-main > p { color: var(--muted); margin-top: 16px; }
.contact-email { display: inline-flex; align-items: center; gap: 32px; margin-top: 33px; font-size: clamp(22px, 2.6vw, 34px); letter-spacing: -.035em; color: var(--accent); }
.contact-email:hover { text-decoration: underline; text-underline-offset: 8px; }
.contact-phone { display: block; width: fit-content; margin-top: 20px; font-size: 22px; font-variant-numeric: tabular-nums; }
.contact-phone:hover { color: var(--accent); }
.contact-meta { display: inline-block; font-size: 13px; color: var(--muted); margin-top: 3px; }
.contact-main > .copy-wechat { display: flex; margin-top: 8px; font-size: 14px; }
.qr-card { width: 252px; border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; background: var(--surface); }
.qr-card img { width: 252px; height: auto; }
.qr-card figcaption { padding: 18px 24px; }
.qr-card strong { display: block; font-weight: 550; font-size: 15px; }
.qr-card figcaption > span { display: block; font-size: 12px; margin-top: 3px; color: var(--muted); }
.qr-card button { font-size: 12px; }
.site-footer { border-top: 1px solid var(--border); padding-block: 28px 32px; margin-top: 24px; color: var(--muted); font-size: 12px; }
.footer-top, .footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.footer-top { color: var(--text); }
.footer-bottom { margin-top: 14px; }
.site-footer a:hover { color: var(--accent); }
.site-dialog { width: min(520px, calc(100% - 32px)); max-height: 90dvh; padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); color: var(--text); box-shadow: 0 24px 80px #08172655; }
.site-dialog::backdrop { background: #081726b8; }
.dialog-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 20px; }
.dialog-header h2 { font-size: 22px; font-weight: 600; }
.dialog-close { font-size: 26px; flex-shrink: 0; }
.dialog-qr { width: min(100%, 360px); height: auto; margin: 0 auto 16px; border-radius: 8px; }
#wechat-dialog { text-align: center; }
#wechat-dialog p { color: var(--muted); font-size: 14px; }
#wechat-dialog > .button { margin-top: 16px; }
.resource-empty { padding: 20px 0 8px; }
.resource-empty h3 { font-size: 19px; font-weight: 550; }
.resource-empty p { color: var(--muted); margin-top: 10px; }
.resource-empty .text-link { margin-top: 18px; }
.configured-resources { list-style: none; padding: 0; }
.configured-resources li { padding: 16px 0; border-bottom: 1px solid var(--border); }
.configured-resources a { color: var(--accent); }
.toast { position: fixed; bottom: 24px; left: 50%; z-index: 60; transform: translateX(-50%); max-width: calc(100vw - 32px); width: max-content; padding: 12px 20px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); box-shadow: 0 8px 32px #08172640; }
.noscript-notice { padding: 24px; text-align: center; color: var(--muted); }
html[lang='en'] .hero h1 { font-size: clamp(40px, 4.1vw, 60px); line-height: 1.15; letter-spacing: -.045em; }
html[lang='en'] .hero-description { line-height: 1.8; }
html[lang='en'] .solution-tabs strong { font-size: 16px; }

@media (min-width: 1536px) { .hero { min-height: 660px; } }
@media (max-width: 1200px) {
  .container { width: calc(100% - 80px); }
  .header-inner { gap: 20px; }
  .desktop-nav { gap: 20px; }
  .brand-cn { display: none; }
  .solution-workspace { grid-template-columns: 300px minmax(0, 1fr); }
  .solution-panel { padding: 30px; }
  .application-grid { gap: 24px; }
  .resource-list article { padding: 20px; }
}
@media (max-width: 1023px) {
  .container { width: calc(100% - 64px); }
  .desktop-nav, .header-contact { display: none; }
  .header-actions { margin-left: auto; gap: 4px; }
  .brand-cn { display: block; }
  .menu-toggle { display: grid; }
  .hero { min-height: 540px; grid-template-columns: 1fr 1fr; gap: 16px; }
  .hero h1 { font-size: 42px; }
  .hero-actions { gap: 20px; }
  .hero-visual img { aspect-ratio: .9; }
  .solution-workspace { grid-template-columns: 260px minmax(0, 1fr); gap: 16px; }
  .solution-tabs button { padding-inline: 16px; gap: 12px; }
  .panel-main h3 { font-size: 26px; }
  .application-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .process-list { grid-template-columns: repeat(3, 1fr); gap: 28px 0; }
  .process-list li:nth-child(4) { border: 0; padding-left: 0; }
  .about-section { gap: 40px; grid-template-columns: .8fr 1.2fr; }
  .resource-list { grid-template-columns: 1fr; gap: 16px; }
  .contact-section { gap: 32px; }
}
@media (max-width: 767px) {
  html { scroll-padding-top: 88px; }
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 68px; gap: 12px; }
  .brand strong { font-size: 23px; }
  .brand { gap: 12px; }
  .brand-cn { font-size: 12px; padding-left: 12px; letter-spacing: .02em; }
  .header-actions { gap: 0; }
  .utility-button { width: 42px; min-height: 44px; }
  .hero { display: flex; flex-direction: column; align-items: stretch; min-height: auto; padding-block: 40px 32px; gap: 32px; }
  .hero h1 { font-size: clamp(35px, 8.3vw, 48px); margin-top: 18px; line-height: 1.4; }
  .hero .eyebrow { font-size: 12px; }
  .hero-description { margin-top: 18px; font-size: 15px; }
  .hero-actions { margin-top: 26px; gap: 24px; }
  .hero-actions .button { padding-inline: 20px; }
  .hero-visual img { aspect-ratio: 1.65; object-position: 68% center; }
  .hero-visual figcaption { font-size: 10px; }
  .section { padding-top: 64px; padding-bottom: 0; }
  .section-heading { margin-bottom: 28px; }
  .section-heading h2, .about-section h2, .contact-section h2 { font-size: 27px; }
  .section-heading > p:not(.eyebrow) { font-size: 14px; }
  .solution-workspace { grid-template-columns: 1fr; gap: 16px; }
  .solution-tabs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .solution-tabs button { min-height: 76px; gap: 10px; padding: 12px 10px; border-color: var(--border); }
  .solution-tabs button[aria-selected='true'] { border-color: var(--accent); }
  .solution-tabs strong { font-size: 14px; }
  .solution-tabs small { font-size: 9px; }
  .tab-mark { width: 18px; font-size: 20px; }
  .tab-arrow { display: none; }
  .solution-panel { padding: 24px; min-height: 460px; }
  .panel-topline { font-size: 11px; }
  .panel-main { margin-top: 24px; }
  .panel-main h3 { font-size: 24px; }
  .panel-main p { font-size: 14px; }
  .scope-block { margin-top: 24px; }
  .scope-block li { font-size: 12px; }
  .application-grid { gap: 30px 22px; }
  .application-grid h3 { font-size: 17px; }
  .application-grid p { font-size: 13px; }
  .application-symbol { margin-bottom: 18px; font-size: 27px; }
  .process-list { grid-template-columns: 1fr; gap: 0; }
  .process-list li, .process-list li:first-child, .process-list li:nth-child(4) { display: grid; grid-template-columns: 36px 1fr; align-items: baseline; column-gap: 18px; padding: 18px 0; border: 0; border-bottom: 1px solid var(--border); }
  .process-list h3 { margin: 0; font-size: 17px; }
  .process-list p { grid-column: 2; margin-top: 6px; }
  .about-section { grid-template-columns: 1fr; gap: 24px; padding-block: 40px; margin-top: 64px; }
  .about-lead { font-size: 14px; }
  .about-body { font-size: 14px; }
  .company-facts { gap: 40px; }
  .company-facts dd { font-size: 16px; }
  .resources-section { padding-top: 52px; }
  .resource-list article { padding: 20px; gap: 12px; flex-direction: column; align-items: flex-start; }
  .resource-list h3 { font-size: 16px; }
  .resource-list p { font-size: 14px; }
  .resource-button { font-size: 14px; gap: 8px; }
  .contact-section { grid-template-columns: 1fr; gap: 32px; margin-top: 64px; padding-top: 0; }
  .contact-section > .contact-main > p { font-size: 14px; }
  .contact-email { font-size: clamp(20px, 6vw, 26px); gap: 20px; margin-top: 24px; overflow-wrap: anywhere; }
  .contact-phone { font-size: 20px; }
  .qr-card { width: 224px; }
  .qr-card img { width: 224px; }
  .qr-card figcaption { padding: 16px 20px; }
  .site-footer { margin-top: 32px; }
  .footer-top, .footer-bottom { flex-direction: column; gap: 8px; }
  html[lang='en'] .hero h1 { font-size: clamp(34px, 8.5vw, 46px); }
  html[lang='en'] .solution-tabs strong { font-size: 13px; }
}
@media (max-width: 359px) {
  .brand-cn { display: none; }
  .hero-actions { gap: 18px; }
  .hero-actions .text-link { font-size: 14px; }
  .tab-mark { display: none; }
  .solution-tabs button { padding-inline: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}