@charset "UTF-8";
:root {
  color-scheme: light;
  --text: #172b49;
  --muted: #61718a;
  --blue: #2563eb;
  --line: #dfe7f3;
  --surface: #f5f8fe;
  --font-sans: "Microsoft YaHei", "微软雅黑", sans-serif;
  --intro-height: max(100svh, 640px);
  --header-height: 92px;
  font-family: var(--font-sans);
  font-synthesis: none;
  scroll-behavior: smooth;
  scroll-padding-top: 36px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { position: relative; margin: 0; background: #fff; color: var(--text); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, [tabindex]:focus-visible { outline: 2px solid #5794ff; outline-offset: 5px; }
::selection { background: #cce2ff; color: #122b51; }
.icon { display: block; flex-shrink: 0; width: 20px; height: 20px; }
.section-shell { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.section-space { padding-block: 88px; }
.surface { background: var(--surface); border-block: 1px solid #edf1f8; }
.skip-link { position: fixed; top: -60px; left: 20px; padding: 12px; background: #fff; color: var(--blue); z-index: 20; }
.skip-link:focus { top: 10px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.header { position: relative; z-index: 5; height: var(--header-height); width: min(1344px, calc(100% - 96px)); margin: auto; display: flex; align-items: center; justify-content: space-between; color: #edf1f7; border-bottom: 1px solid #a9bed51c; }
.brand { display: inline-flex; align-items: center; font-family: var(--font-sans); font-size: 14px; font-weight: 400; line-height: 1.5; letter-spacing: 0; }
.header nav { display: flex; align-items: center; gap: 32px; font-size: 13px; color: #b7c2d3; }
.header nav a:hover { color: #fff; }
.header .nav-action { display: inline-flex; align-items: center; gap: 18px; border: 1px solid #96a9c33d; border-radius: 6px; padding: 11px 17px; color: #edf1f7; }
.nav-action svg { display: block; flex-shrink: 0; }
.menu-toggle { display: none; }
.starfield { position: absolute; inset: 0 0 auto; height: var(--intro-height); overflow: hidden; pointer-events: none; background: #050912; isolation: isolate; }
.starfield::after { content: ""; position: absolute; inset: 0; z-index: 2; background: linear-gradient(0deg, #050912, transparent 18%), radial-gradient(ellipse at 50% 46%, #04081380, transparent 59%), radial-gradient(ellipse at 50% 50%, transparent 35%, #02040c60); }
.starfield-nebula { position: absolute; inset: -12%; background: radial-gradient(ellipse at 76% 28%, #5552952e, transparent 29%), radial-gradient(ellipse at 67% 41%, #344c8826, transparent 24%), radial-gradient(ellipse at 26% 66%, #224c6930, transparent 31%), radial-gradient(ellipse at 48% 57%, #38607817, transparent 35%), linear-gradient(148deg, transparent 35%, #53517710 43%, #11132705 46%, #3c52721c 50%, transparent 61%); animation: nebula-drift 32s ease-in-out infinite alternate; }
.starfield-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.starfield-glints { position: absolute; inset: 0; background: radial-gradient(circle at 18% 26%, #e2eeff 0 .7px, #a5c6ff50 1px, transparent 5px), radial-gradient(circle at 81% 21%, #e2eeff 0 .9px, #a5c6ff50 1.3px, transparent 7px), radial-gradient(circle at 72% 68%, #e2eeff 0 .8px, #a5c6ff50 1px, transparent 6px), radial-gradient(circle at 10% 72%, #e2eeff 0 .6px, #a5c6ff50 1px, transparent 4px), radial-gradient(circle at 92% 48%, #e2eeff 0 .8px, #a5c6ff50 1px, transparent 6px); animation: starlight 6s ease-in-out infinite alternate; }
.starfield.is-paused *, .starfield.is-hidden * { animation-play-state: paused; }
.mercury-concept { position: absolute; top: 12%; right: -12%; width: min(62vw, 980px); height: 76%; opacity: .6; mask-image: radial-gradient(ellipse at 65% 22%, #000 15%, transparent 65%); }
.mercury-concept::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 65% 105%, transparent 58%, #7e9db91c 58.1%, #bcd7e275 58.3%, #739cbb29 58.55%, transparent 60.5%); }
.mercury-concept::after { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 65% 105%, transparent 52%, #688ebc18 58%, transparent 66%); filter: blur(16px); }
.hero { position: relative; min-height: calc(var(--intro-height) - var(--header-height)); display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 64px 0 96px; text-align: left; color: #edf1f7; }
.hero-copy { position: relative; width: 100%; max-width: 940px; }
.hero h1 { display: flex; flex-wrap: wrap; gap: 0 .3em; font-size: clamp(34px, 3.4vw, 48px); font-weight: 700; line-height: 1.45; letter-spacing: -1px; margin: 0 0 23px; }
.hero h1 > span { white-space: nowrap; }
.hero .accent { color: #69bcfa; background: linear-gradient(100deg, #20b9f3, #bcb0f4); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-description { color: #d0d7e2; max-width: 820px; margin: 0; font-size: 16px; line-height: 1.85; }
.hero-intro { display: block; margin-bottom: 5px; }
.hero-actions { display: flex; gap: 16px; margin-top: 27px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 46px; padding: 0 22px; font-size: 14px; font-weight: 500; border: 1px solid transparent; border-radius: 7px; transition: background .2s, border-color .2s; }
.button-primary { background: var(--blue); color: #fff; }
.button-primary:hover { background: #174fc5; }
.hero .button { min-height: 42px; padding-inline: 20px; }
.hero .button-primary { background: #22b8ee; color: #071a26; }
.hero .button-primary:hover { background: #66d4ff; }
.hero .button-secondary { border-color: #8e9aaf80; color: #edf1f7; background: #070c1680; }
.hero .button-secondary:hover { background: #19253a; border-color: #b0bed2; }
.hero-scroll { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 11px; color: #92a3b6; font-family: var(--font-sans); font-size: 12px; font-weight: 400; letter-spacing: normal; }
.hero-scroll svg { display: block; flex-shrink: 0; color: #c9d9e8; }
.section-label { display: block; color: var(--blue); font-size: 12px; font-weight: 500; line-height: 1.7; }
h2 { margin: 12px 0 0; font-size: clamp(26px, 2.5vw, 34px); font-weight: 600; line-height: 1.5; letter-spacing: -.5px; }
h3 { margin: 0; font-size: 20px; font-weight: 600; line-height: 1.6; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 36px; }
.section-heading p { margin: 0 0 4px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.section-heading.centered { display: block; text-align: center; }
.section-heading.centered p { margin-top: 15px; }
.text-link { display: inline-flex; align-items: center; gap: 9px; color: var(--blue); font-size: 13px; font-weight: 500; line-height: 1.8; }
.text-link:hover { color: #1248b4; text-decoration: underline; text-underline-offset: 4px; }
.text-link .icon { width: 17px; height: 17px; }
.audience-tabs { display: grid; grid-template-columns: repeat(3, 1fr); max-width: 780px; margin: 0 auto 28px; border-bottom: 1px solid var(--line); }
.audience-tabs button { position: relative; display: flex; align-items: center; justify-content: center; gap: 12px; padding: 18px 12px; border: 0; background: transparent; color: var(--muted); font-size: 15px; cursor: pointer; }
.audience-tabs button::after { content: ""; position: absolute; height: 3px; left: 20%; right: 20%; bottom: -1px; border-radius: 3px; background: transparent; }
.audience-tabs button:hover { color: var(--blue); background: #f8faff; }
.audience-tabs button[aria-selected="true"] { color: var(--blue); }
.audience-tabs button[aria-selected="true"]::after { background: var(--blue); }
.audience-panel { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 64px; padding: 42px; border: 1px solid #dce8fb; border-radius: 14px; background: linear-gradient(110deg, #f0f6ff, #fafcff); }
.audience-copy h3 { margin-top: 13px; font-size: 24px; }
.audience-copy p { margin: 16px 0 24px; font-size: 14px; line-height: 1.95; color: var(--muted); }
.scenario-points { list-style: none; display: grid; gap: 23px; margin: 0; padding: 0; }
.scenario-points li { display: flex; align-items: flex-start; gap: 14px; }
.scenario-points .icon { color: var(--blue); margin-top: 3px; }
.scenario-points strong { display: block; font-size: 14px; font-weight: 600; line-height: 1.8; }
.scenario-points span { display: block; color: var(--muted); font-size: 13px; line-height: 1.9; margin-top: 3px; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.capability-card { display: flex; flex-direction: column; align-items: flex-start; padding: 30px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.icon-tile, .step-icon { display: flex; align-items: center; justify-content: center; flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px; color: var(--blue); background: #edf4ff; }
.icon-tile .icon, .step-icon .icon { width: 24px; height: 24px; }
.capability-card h3 { margin-top: 23px; }
.capability-card p { margin: 12px 0 0; color: var(--muted); font-size: 13px; line-height: 1.95; }
.capability-card ul { list-style: none; display: grid; gap: 12px; padding: 24px 0; margin: 0 0 22px; width: 100%; border-bottom: 1px solid #edf1f8; }
.capability-card li { display: flex; gap: 9px; align-items: center; font-size: 13px; line-height: 1.7; }
.capability-card li .icon { color: #4a83e5; width: 16px; height: 16px; }
.capability-card .text-link { margin-top: auto; }
.section-note { display: flex; align-items: flex-start; justify-content: center; gap: 8px; margin: 25px 0 0; font-size: 12px; line-height: 1.8; color: var(--muted); }
.section-note .icon { width: 17px; height: 17px; margin-top: 2px; }
.onboarding-grid { display: grid; grid-template-columns: 1fr 1.12fr; gap: 68px; align-items: start; }
.readiness { border: 1px solid #d9e6fa; border-radius: 12px; padding: 30px; background: #f5f9ff; }
.readiness-heading { display: flex; align-items: center; gap: 10px; }
.readiness-heading .icon { color: var(--blue); width: 24px; height: 24px; }
.readiness > p { color: var(--muted); font-size: 12px; line-height: 1.9; margin: 12px 0 18px; }
.readiness-options { display: grid; gap: 10px; margin: 0; border: 0; padding: 0; min-width: 0; }
.readiness-options label { display: flex; gap: 11px; align-items: flex-start; padding: 15px; background: #fff; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.readiness-options label:has(input:checked) { border-color: #92b8ff; background: #eef5ff; }
.readiness-options input { width: 17px; height: 17px; margin: 4px 0 0; flex-shrink: 0; accent-color: var(--blue); cursor: pointer; }
.readiness-options strong { display: block; font-size: 13px; font-weight: 500; line-height: 1.9; }
.readiness-options label span span { display: block; color: var(--muted); font-size: 12px; line-height: 1.8; margin-top: 3px; }
.readiness-progress { display: flex; align-items: center; gap: 20px; margin-top: 23px; color: var(--blue); font-size: 12px; }
.readiness-progress > span { flex-shrink: 0; }
.readiness-progress progress { width: 100%; min-width: 0; height: 5px; appearance: none; border: 0; border-radius: 4px; overflow: hidden; background: #dde8f9; }
.readiness-progress progress::-webkit-progress-bar { background: #dde8f9; border-radius: 4px; }
.readiness-progress progress::-webkit-progress-value { background: var(--blue); border-radius: 4px; }
.readiness-progress progress::-moz-progress-bar { background: var(--blue); }
.readiness .readiness-result { min-height: 46px; margin-bottom: 0; }
.steps { list-style: none; display: grid; gap: 32px; margin: 0; padding: 8px 0 0; }
.steps li { display: flex; gap: 22px; position: relative; }
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 23px; top: 60px; bottom: -20px; width: 1px; background: var(--line); }
.step-label { display: block; color: var(--blue); font-size: 11px; margin: 1px 0 7px; }
.steps h3 { font-size: 18px; }
.steps p { font-size: 13px; line-height: 1.95; color: var(--muted); margin: 9px 0 0; }
.steps .text-link { margin-top: 12px; }
.questions-grid { display: grid; grid-template-columns: 1fr 1.7fr; gap: 72px; }
.questions .section-heading { display: block; margin: 0; }
.questions .section-heading p { margin-top: 20px; }
.questions .section-heading .text-link { margin-top: 24px; }
.faq-list { display: grid; align-content: start; gap: 12px; }
.faq-list details { border: 1px solid var(--line); border-radius: 9px; background: #fff; padding: 21px 24px; }
.faq-list details[open] { border-color: #b4cef5; }
.faq-list summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: 14px; line-height: 1.8; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .icon { color: #6b85aa; width: 18px; height: 18px; transition: transform .2s; }
.faq-list details[open] summary .icon { transform: rotate(180deg); color: var(--blue); }
.faq-list p { font-size: 13px; line-height: 1.95; color: var(--muted); margin: 14px 25px 0 0; }
.closing { display: flex; align-items: center; justify-content: space-between; gap: 36px; padding: 40px 44px; margin-block: 64px; border: 1px solid #dce8fb; border-radius: 14px; background: linear-gradient(110deg, #f0f6ff, #fafcff); }
.closing h2 { font-size: 27px; }
.closing p { margin: 12px 0 0; font-size: 13px; color: var(--muted); line-height: 1.9; }
.closing .button { flex-shrink: 0; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 110px; border-top: 1px solid var(--line); }
.footer-legal { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; font-size: 12px; color: var(--muted); line-height: 1.8; }
.footer a:hover { color: var(--blue); }
.back-top { display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0; font-size: 12px; color: var(--muted); }
.back-top .icon { width: 16px; height: 16px; }
@keyframes nebula-drift { from { transform: translate(-1%, 1%) scale(1); opacity: .7; } to { transform: translate(1%, -1%) scale(1.05); opacity: 1; } }
@keyframes starlight { from { opacity: .3; } to { opacity: .95; } }
@media (max-width: 1100px) {
  .section-shell, .header { width: calc(100% - 64px); }
  .header nav { gap: 22px; }
  .audience-panel { gap: 36px; padding: 32px; }
  .capability-card { padding: 24px; }
  .onboarding-grid, .questions-grid { gap: 36px; }
  .closing { padding: 32px; }
  .footer { flex-wrap: wrap; padding-block: 26px; }
  .footer-legal { flex-direction: column; }
}
@media (max-width: 760px) {
  :root { --header-height: 76px; scroll-padding-top: 24px; }
  .section-shell, .header { width: calc(100% - 40px); }
  .section-space { padding-block: 56px; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 38px; padding: 8px; color: #edf1f7; background: transparent; border: 1px solid #96a9c33d; border-radius: 6px; cursor: pointer; }
  .menu-toggle .menu-close, .menu-toggle[aria-expanded="true"] .menu-open { display: none; }
  .menu-toggle[aria-expanded="true"] .menu-close { display: block; }
  .header nav { display: none; position: absolute; top: 65px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 18px; background: #0c1424; border: 1px solid #34445b; border-radius: 8px; box-shadow: 0 20px 40px #0006; }
  .header nav.is-open { display: flex; }
  .header nav > a { padding: 14px; }
  .header .nav-action { justify-content: space-between; margin-top: 8px; }
  .hero { padding: 48px 0 96px; }
  .mercury-concept { top: 9%; right: -95%; width: 160vw; opacity: .3; }
  .hero h1 { font-size: clamp(28px, 7.4vw, 36px); letter-spacing: -.5px; margin-bottom: 21px; }
  .hero-description { max-width: 620px; font-size: 14px; line-height: 1.9; }
  .hero-actions { gap: 13px; margin-top: 25px; }
  .hero .button { padding-inline: 18px; font-size: 13px; }
  .hero-scroll { bottom: 25px; }
  h2 { font-size: 26px; }
  .section-heading { display: block; margin-bottom: 28px; }
  .section-heading p { margin-top: 16px; font-size: 13px; }
  .audience-tabs { margin-bottom: 20px; }
  .audience-tabs button { flex-direction: column; gap: 9px; padding: 16px 2px; font-size: 13px; }
  .audience-panel { grid-template-columns: 1fr; padding: 26px; gap: 30px; }
  .audience-copy h3 { font-size: 21px; }
  .audience-copy p { font-size: 13px; margin-bottom: 20px; }
  .scenario-points { gap: 20px; padding-top: 25px; border-top: 1px solid #dce8fb; }
  .capability-grid, .onboarding-grid, .questions-grid { grid-template-columns: 1fr; gap: 20px; }
  .capability-card { padding: 26px; }
  .capability-card h3 { margin-top: 18px; }
  .capability-card ul { margin-bottom: 18px; padding-block: 20px; }
  .section-note { justify-content: flex-start; }
  .readiness { padding: 24px; }
  .steps { padding-top: 12px; gap: 30px; }
  .steps li { gap: 18px; }
  .steps h3 { font-size: 17px; }
  .questions-grid { gap: 28px; }
  .questions .section-heading p br { display: none; }
  .questions .section-heading .text-link { margin-top: 16px; }
  .faq-list details { padding: 19px 20px; }
  .faq-list summary { font-size: 13px; }
  .faq-list p { margin-right: 0; }
  .closing { display: block; padding: 28px; margin-block: 40px; }
  .closing h2 { font-size: 24px; }
  .closing .button { margin-top: 24px; font-size: 13px; }
  .footer { gap: 18px; }
  .footer .brand { width: 100%; }
  .footer-legal { width: 100%; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}