:root {
  --ink: #07111f;
  --navy: #0a1d36;
  --blue: #1677ff;
  --cyan: #62d9ff;
  --paper: #f3f7fb;
  --line: #cdd9e6;
  --muted: #536475;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", Arial, sans-serif; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 100; padding: 10px 14px; background: white; }
.skip-link:focus { left: 8px; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(7, 17, 31, .95); border-bottom: 1px solid rgba(255, 255, 255, .12); backdrop-filter: blur(14px); }
.nav-wrap { width: min(1180px, calc(100% - 40px)); height: 72px; margin: auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: white; font-size: 18px; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--blue); }
.brand-mark::after { content: ""; width: 0; height: 0; margin-left: 3px; border-top: 7px solid transparent; border-bottom: 7px solid transparent; border-left: 11px solid white; }
.brand strong { color: var(--cyan); }
.main-nav { display: flex; align-items: center; gap: 28px; color: #d6e5f5; font-size: 14px; }
.main-nav a { padding: 26px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: white; border-color: var(--cyan); }
.menu-button { display: none; border: 0; background: transparent; color: white; cursor: pointer; }
.carousel { position: relative; height: min(34vw, 500px); min-height: 330px; overflow: hidden; background: var(--ink); }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .65s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.slide img { width: 100%; height: 100%; object-fit: cover; }
.slide::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3, 10, 19, .88), rgba(3, 10, 19, .38) 48%, transparent 80%); }
.slide-copy { position: absolute; z-index: 2; left: max(30px, calc((100vw - 1180px) / 2)); top: 50%; width: min(610px, 72vw); transform: translateY(-50%); color: white; }
.slide-copy p, .eyebrow { margin: 0; color: var(--cyan); font-size: 11px; font-weight: 800; letter-spacing: .2em; }
.slide-copy h2 { margin: 13px 0 0; font-size: clamp(32px, 4.5vw, 64px); line-height: 1.1; letter-spacing: -.045em; }
.slide-controls { position: absolute; z-index: 4; right: max(30px, calc((100vw - 1180px) / 2)); bottom: 25px; display: flex; gap: 6px; }
.slide-controls button { width: 42px; height: 34px; border: 1px solid rgba(255, 255, 255, .4); background: rgba(7, 17, 31, .45); color: white; cursor: pointer; }
.slide-controls button.is-active { border-color: var(--blue); background: var(--blue); }
.hero { padding: 86px max(30px, calc((100vw - 1180px) / 2)); color: white; background: radial-gradient(circle at 82% 20%, rgba(22, 119, 255, .42), transparent 30%), linear-gradient(125deg, #07111f, #0a1d36 62%, #07111f); }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: center; }
.hero h1 { margin: 18px 0 0; font-size: clamp(45px, 6vw, 80px); line-height: 1.03; letter-spacing: -.055em; }
.hero h1 span { color: #96caff; font-weight: 400; }
.hero-copy > p:last-of-type { margin: 27px 0 0; color: #c8d7e6; font-size: 16px; line-height: 2; }
.hero-board { min-height: 560px; padding: 25px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid rgba(255, 255, 255, .18); background: rgba(255, 255, 255, .06); }
.hero-mini { position: relative; height: 215px; margin: 20px 0; overflow: hidden; background: #102943; }
.hero-mini img { width: 100%; height: 100%; object-fit: cover; }
.hero-mini figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 25px 14px 12px; background: linear-gradient(transparent, rgba(3, 10, 19, .88)); color: #d9e9f8; font-size: 12px; }
.hero-board small { color: var(--cyan); letter-spacing: .18em; }
.hero-board strong { font-size: 34px; line-height: 1.25; }
.hero-board div { display: flex; gap: 9px; flex-wrap: wrap; }
.hero-board span { padding: 8px 10px; border: 1px solid #526e8c; color: #afc4d9; font-size: 12px; }
.actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.button { min-height: 46px; padding: 0 19px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #536f8d; color: white; font-size: 14px; font-weight: 700; }
.button.primary { border-color: var(--blue); background: var(--blue); }
.content-section { width: min(1180px, calc(100% - 40px)); margin: auto; padding: 88px 0; }
.section-heading { display: grid; grid-template-columns: 170px minmax(280px, 1fr) 1fr; gap: 28px; align-items: end; margin-bottom: 35px; }
.section-heading p { margin: 0; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .17em; }
.section-heading h2 { margin: 0; font-size: clamp(30px, 4vw, 50px); line-height: 1.1; letter-spacing: -.04em; }
.section-heading span { color: var(--muted); font-size: 14px; line-height: 1.85; }
.feature-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 16px; }
.feature-card { min-height: 330px; padding: 25px; display: flex; flex-direction: column; background: white; border: 1px solid var(--line); }
.feature-card:first-child { color: white; background: linear-gradient(145deg, #0d2a49, #1677ff); }
.feature-card p { margin: 0; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.feature-card:first-child p { color: var(--cyan); }
.feature-card h3 { margin: 15px 0 10px; font-size: 27px; }
.feature-card span { color: var(--muted); line-height: 1.8; font-size: 14px; }
.feature-card:first-child span { color: #d3e4f5; }
.feature-card small { margin-top: auto; padding-top: 28px; color: #8595a6; }
.feature-card:first-child small { color: #a9d4ff; }
.link-row { margin-top: 25px; color: var(--blue); font-weight: 700; font-size: 14px; }
.principles { padding: 78px max(30px, calc((100vw - 1180px) / 2)); background: #dbeaff; }
.principles h2 { max-width: 900px; margin: 14px 0 32px; font-size: clamp(34px, 5vw, 62px); line-height: 1.1; letter-spacing: -.05em; }
.principles div { display: flex; gap: 9px; flex-wrap: wrap; }
.principles span { padding: 8px 11px; border: 1px solid #9fbce0; font-size: 13px; }
.page-hero { padding: 100px max(30px, calc((100vw - 1180px) / 2)) 76px; color: white; background: linear-gradient(125deg, #07111f, #0b2e56); }
.page-hero h1 { max-width: 920px; margin: 18px 0; font-size: clamp(42px, 6vw, 74px); line-height: 1.05; letter-spacing: -.05em; }
.page-hero > span { display: block; max-width: 740px; color: #b9cde0; line-height: 1.9; }
.article-layout { width: min(1080px, calc(100% - 40px)); margin: auto; padding: 70px 0 95px; display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 68px; align-items: start; }
.breadcrumb { display: flex; gap: 8px; margin-bottom: 42px; color: #788796; font-size: 13px; }
.breadcrumb a { color: var(--blue); }
.prose h2 { margin: 46px 0 15px; font-size: 30px; letter-spacing: -.03em; }
.prose h2:first-of-type { margin-top: 0; }
.prose h3 { margin: 32px 0 12px; font-size: 21px; }
.prose p, .prose li { color: #485868; font-size: 16px; line-height: 2; }
.prose ul, .prose ol { padding-left: 24px; }
.aside-nav { position: sticky; top: 98px; display: flex; flex-direction: column; border-top: 3px solid var(--blue); background: #e7f1fc; }
.aside-nav strong, .aside-nav a { padding: 15px 18px; }
.aside-nav a { border-top: 1px solid #bfd2e8; color: #4b6076; font-size: 13px; }
.listing { display: grid; gap: 13px; }
.listing article { padding: 24px; background: white; border: 1px solid var(--line); }
.listing h3 { margin: 10px 0; }
.listing small { display: block; margin-top: 18px; color: #8090a0; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 20px 0; cursor: pointer; font-size: 18px; font-weight: 700; }
.faq-list p { margin: 0 0 23px; }
.site-footer { padding: 60px max(30px, calc((100vw - 1180px) / 2)) 25px; background: var(--ink); color: #d6e5f4; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 55px; }
.footer-grid h2 { margin: 0 0 17px; font-size: 13px; }
.footer-grid p { max-width: 400px; color: #8ba0b6; line-height: 1.8; font-size: 14px; }
.footer-links { display: flex; gap: 10px 17px; flex-wrap: wrap; color: #9db1c6; font-size: 13px; }
.footer-bottom { margin-top: 45px; padding-top: 20px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid #24364a; color: #73879c; font-size: 12px; }
.domain-display { padding: 7px 10px; border: 1px solid #33485e; }
@media (max-width: 900px) {
  .hero-grid, .article-layout { grid-template-columns: 1fr; }
  .section-heading { grid-template-columns: 1fr; gap: 10px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .aside-nav { position: static; }
}
@media (max-width: 680px) {
  .nav-wrap { height: 62px; }
  .menu-button { display: block; }
  .main-nav { display: none; position: absolute; left: 0; right: 0; top: 62px; padding: 17px 20px; flex-direction: column; align-items: stretch; gap: 0; background: var(--ink); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 13px 0; }
  .carousel { height: 58vh; min-height: 410px; }
  .slide-copy { left: 20px; width: calc(100% - 40px); }
  .slide-controls { right: 20px; }
  .hero, .page-hero { padding: 58px 20px; }
  .hero h1 { font-size: 43px; }
  .hero-board { min-height: 300px; }
  .content-section { width: calc(100% - 28px); padding: 62px 0; }
  .article-layout { width: calc(100% - 28px); padding: 48px 0 70px; gap: 40px; }
  .principles { padding: 62px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > div:first-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}