:root {
  color-scheme: dark;
  --ink: #090a0c;
  --ink-soft: #121518;
  --panel: #171b1e;
  --paper: #f3f5f4;
  --paper-strong: #ffffff;
  --text: #f7f8f7;
  --muted: #a7afb1;
  --dark-text: #181d1f;
  --dark-muted: #626b6e;
  --line: #30363a;
  --paper-line: #d8dddc;
  --cyan: #28c4d8;
  --coral: #f06d5f;
  --mint: #61c98b;
  --yellow: #dfb952;
  --violet: #9581d8;
  --blue: #5c92d6;
  --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--text); font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif; letter-spacing: 0; }
body, button, a { font-size: 16px; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
button:disabled { cursor: not-allowed; opacity: .58; }
.shell { width: min(var(--shell), calc(100% - 48px)); margin: 0 auto; }
.site-header { position: fixed; z-index: 50; top: 0; left: 0; right: 0; height: 68px; padding: 0 max(24px, calc((100vw - var(--shell)) / 2)); display: flex; align-items: center; justify-content: space-between; background: rgba(9, 10, 12, .92); border-bottom: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; background: var(--cyan); color: #071013; border-radius: 6px; }
.brand-mark svg { width: 20px; height: 20px; }
.site-nav { display: flex; align-items: center; gap: 32px; color: #d0d5d5; }
.site-nav > a { font-size: 14px; }
.site-nav > a:hover { color: #fff; }
.site-nav .nav-download { display: inline-flex; align-items: center; gap: 7px; min-height: 40px; padding: 0 15px; color: #071013; background: var(--cyan); border-radius: 6px; font-weight: 800; }
.nav-download svg { width: 17px; }
.icon-button { width: 40px; height: 40px; border: 1px solid var(--line); background: #15181b; color: white; border-radius: 6px; display: grid; place-items: center; }
.menu-button { display: none; }

.hero { min-height: min(84vh, 800px); position: relative; display: flex; align-items: flex-end; overflow: hidden; background: #171a1d; border-bottom: 1px solid var(--line); }
.hero-shade { position: absolute; inset: 0; background: rgba(5, 7, 8, .76); }
.hero-content { position: relative; z-index: 1; padding: 150px 0 78px; }
.eyebrow { margin: 0 0 16px; color: #b8eaf0; font-size: 13px; font-weight: 800; text-transform: uppercase; }
.eyebrow.dark { color: #197989; }
.live-dot { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px rgba(97,201,139,.16); }
.hero h1 { margin: 0; max-width: 780px; font-size: clamp(54px, 8vw, 104px); line-height: .98; font-weight: 900; }
.hero-lead { max-width: 690px; margin: 28px 0 0; color: #d5dada; font-size: 20px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 48px; padding: 0 20px; border-radius: 6px; font-weight: 800; }
.button svg { width: 19px; }
.button.primary { background: var(--cyan); color: #071013; }
.button.primary:hover { background: #60d4e2; }
.button.secondary { background: rgba(18,21,24,.82); border: 1px solid #596166; color: white; }
.button.secondary:hover { background: #23282c; }
.hero-facts { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); max-width: 760px; margin: 54px 0 0; padding: 22px 0 0; border-top: 1px solid rgba(255,255,255,.22); }
.hero-facts div { padding-right: 24px; }
.hero-facts dt { font-size: 16px; font-weight: 800; }
.hero-facts dd { margin: 5px 0 0; color: #aeb5b6; font-size: 12px; }
.scroll-cue { position: absolute; z-index: 2; right: 28px; bottom: 28px; display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.32); border-radius: 50%; }

.section { padding: 104px 0; }
.section-light { background: var(--paper); color: var(--dark-text); }
.section-heading { max-width: 660px; margin-bottom: 48px; }
.section-heading h2, .product-copy h2, .cloud-copy h2, .responsible-layout h2, .download-layout h2 { margin: 0; font-size: 40px; line-height: 1.24; }
.section-heading > p:not(.eyebrow), .split-heading > p { color: var(--dark-muted); line-height: 1.8; }
.split-heading { max-width: none; display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 80px; }
.split-heading > p { margin: 0; }
.centered { margin-left: auto; margin-right: auto; text-align: center; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature-card { min-height: 330px; padding: 28px; background: var(--paper-strong); border: 1px solid var(--paper-line); border-top: 4px solid var(--accent); border-radius: 6px; }
.feature-icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 28px; color: #111719; background: color-mix(in srgb, var(--accent) 32%, white); border-radius: 6px; }
.feature-card h3 { margin: 0 0 12px; font-size: 21px; }
.feature-card p { min-height: 88px; margin: 0; color: var(--dark-muted); line-height: 1.75; font-size: 14px; }
.feature-card ul { display: flex; flex-wrap: wrap; gap: 7px; margin: 22px 0 0; padding: 0; list-style: none; }
.feature-card li { padding: 5px 8px; border: 1px solid var(--paper-line); border-radius: 4px; color: #4b5457; font-size: 12px; }
.accent-cyan { --accent: var(--cyan); } .accent-coral { --accent: var(--coral); } .accent-mint { --accent: var(--mint); }
.accent-yellow { --accent: var(--yellow); } .accent-violet { --accent: var(--violet); } .accent-blue { --accent: var(--blue); }

.product-band { padding: 108px 0; background: #101315; border-top: 1px solid #272c2f; border-bottom: 1px solid #272c2f; }
.product-layout { display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; gap: 68px; }
.product-copy > p:not(.eyebrow) { color: var(--muted); line-height: 1.8; }
.product-points { display: grid; gap: 12px; margin-top: 28px; }
.product-points span { display: flex; align-items: center; gap: 10px; color: #d7dddd; }
.product-points svg { width: 18px; color: var(--mint); }
.product-shot { margin: 0; background: #08090b; border: 1px solid #3a4145; border-radius: 8px; overflow: hidden; box-shadow: 0 28px 60px rgba(0,0,0,.35); }
.product-shot img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; }
.product-shot figcaption { padding: 10px 14px; color: #778083; font-size: 11px; border-top: 1px solid #2b3033; }

.cloud-section { position: relative; overflow: hidden; background: #08090b; border-top: 1px solid #25292d; border-bottom: 1px solid #25292d; }
.cloud-showcase { display: grid; grid-template-columns: .95fr 1.05fr; gap: 72px; align-items: center; }
.cloud-copy p:not(.eyebrow) { color: #aeb7b7; line-height: 1.8; }
.cloud-copy h2 { font-size: 52px; line-height: 1.35; }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--cyan); font-weight: 800; }
.text-link svg { width: 17px; }
.compute-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 34px; }
.compute-cards > div { display: grid; grid-template-columns: 44px 1fr; column-gap: 13px; min-height: 108px; padding: 18px; background: #15181c; border: 1px solid #292e33; border-radius: 6px; }
.compute-cards span { grid-row: 1 / span 2; display: grid; place-items: center; width: 44px; height: 44px; background: #203b40; color: var(--cyan); border-radius: 6px; }
.compute-cards > div:nth-child(2) span { background: #3a2d25; color: var(--yellow); }
.compute-cards > div:nth-child(3) span { background: #24372c; color: var(--mint); }
.compute-cards > div:nth-child(4) span { background: #352d42; color: #b6a1ee; }
.compute-cards strong { align-self: end; font-size: 14px; }
.compute-cards small { margin-top: 5px; color: #8f999b; line-height: 1.5; }
.compute-console { position: relative; overflow: hidden; padding: 28px; background: #151720; border: 1px solid #303440; border-radius: 8px; box-shadow: 0 32px 80px rgba(0,0,0,.42); }
.compute-console::after { content: ""; position: absolute; z-index: 0; left: 0; right: 0; top: -2px; height: 2px; background: rgba(40,196,216,.65); animation: console-scan 4.8s linear infinite; }
.console-head { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 20px; margin-bottom: 20px; color: #767f86; font-family: Consolas, monospace; font-size: 11px; }
.console-state { display: inline-flex; align-items: center; gap: 7px; color: var(--mint); }
.console-state i { width: 7px; height: 7px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 14px var(--mint); animation: status-pulse 1.8s ease-in-out infinite; }
.compute-stream { position: relative; z-index: 1; height: 4px; margin-bottom: 20px; overflow: hidden; background: #292d35; }
.compute-stream span { position: absolute; top: 0; left: -22px; width: 22px; height: 4px; background: var(--cyan); animation: data-stream 3.2s linear infinite; }
.compute-stream span:nth-child(2) { animation-delay: .55s; }.compute-stream span:nth-child(3) { animation-delay: 1.1s; }.compute-stream span:nth-child(4) { animation-delay: 1.65s; }.compute-stream span:nth-child(5) { animation-delay: 2.2s; }
.engine-row { position: relative; z-index: 1; display: grid; grid-template-columns: 70px 1fr auto; align-items: center; gap: 16px; min-height: 86px; margin-top: 12px; padding: 14px 18px; background: #090a0d; border: 1px solid #292d34; border-radius: 6px; }
.engine-row:hover { border-color: #3e5459; }
.engine-lights { display: flex; gap: 10px; }
.engine-lights i { width: 9px; height: 9px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 14px rgba(97,201,139,.75); animation: engine-light 1.8s ease-in-out infinite; }
.engine-lights i:nth-child(2) { animation-delay: .22s; }.engine-lights i:nth-child(3) { animation-delay: .44s; }
.engine-row strong { display: block; font-family: Consolas, monospace; font-size: 14px; }
.engine-row small { display: block; margin-top: 4px; color: #6f797d; font-size: 11px; }
.engine-row em { color: var(--mint); font-family: Consolas, monospace; font-size: 12px; font-style: normal; }
.console-specs { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 20px; background: #30343b; border: 1px solid #30343b; }
.console-specs span { padding: 12px 8px; background: #101216; color: #6f797d; text-align: center; font-family: Consolas, monospace; font-size: 10px; }
.console-specs b { color: #d8dede; font-size: 12px; }

@keyframes console-scan { 0% { transform: translateY(0); opacity: 0; } 10% { opacity: 1; } 90% { opacity: .5; } 100% { transform: translateY(560px); opacity: 0; } }
@keyframes status-pulse { 0%, 100% { opacity: .45; transform: scale(.82); } 50% { opacity: 1; transform: scale(1.12); } }
@keyframes data-stream { from { transform: translateX(0); } to { transform: translateX(620px); } }
@keyframes engine-light { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }

.workflow-list { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid #cbd1d0; border-bottom: 1px solid #cbd1d0; }
.workflow-list li { position: relative; min-height: 300px; padding: 70px 26px 30px; border-right: 1px solid #cbd1d0; }
.workflow-list li:last-child { border-right: 0; }
.workflow-list li > svg { width: 34px; height: 34px; color: #197989; }
.step-number { position: absolute; top: 18px; right: 20px; color: #b1b9b8; font-size: 13px; font-weight: 800; }
.workflow-list h3 { margin: 34px 0 10px; font-size: 20px; }
.workflow-list p { margin: 0; color: var(--dark-muted); line-height: 1.75; font-size: 14px; }

.responsible-section { padding: 88px 0; background: #352f2d; border-top: 1px solid #514743; border-bottom: 1px solid #514743; }
.responsible-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; align-items: start; }
.responsible-copy > p { margin: 0; color: #d5cfcc; line-height: 1.85; }
.legal-links { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 24px; }
.legal-links a { color: #f2c974; font-size: 14px; text-decoration: underline; text-underline-offset: 4px; }

.faq-layout { display: grid; grid-template-columns: .65fr 1.35fr; gap: 90px; }
.dark-link { color: #197989; }
.faq-list { border-top: 1px solid var(--paper-line); }
.faq-list details { border-bottom: 1px solid var(--paper-line); }
.faq-list summary { position: relative; padding: 24px 42px 24px 0; cursor: pointer; list-style: none; font-weight: 800; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { position: absolute; right: 0; width: 20px; transition: transform .2s ease; }
.faq-list details[open] summary svg { transform: rotate(180deg); }
.faq-list details p { margin: -8px 50px 24px 0; color: var(--dark-muted); line-height: 1.8; }

.contact-section { padding: 82px 0; background: #101315; border-top: 1px solid #272c2f; }
.contact-layout { display: grid; grid-template-columns: 1fr 320px; gap: 72px; align-items: center; }
.contact-copy h2 { max-width: 650px; margin: 0; font-size: 44px; line-height: 1.25; }
.contact-copy > p:not(.eyebrow) { max-width: 620px; color: #9da6a8; line-height: 1.8; }
.contact-hours { display: flex; align-items: center; gap: 15px; margin-top: 30px; }
.contact-hours > svg { width: 38px; height: 38px; color: var(--cyan); }
.contact-hours span { display: grid; gap: 4px; }
.contact-hours small { color: #7d8789; }
.wechat-card { width: min(100%, 320px); margin: 0; padding: 14px; justify-self: end; background: white; border-radius: 8px; box-shadow: 0 28px 70px rgba(0,0,0,.34); }
.wechat-card img { display: block; width: 100%; height: auto; object-fit: contain; }
.wechat-card figcaption { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 0 0; color: #273034; font-weight: 800; font-size: 13px; }
.wechat-card figcaption svg { width: 18px; }

.download-cta { padding: 78px 0; background: var(--cyan); color: #071013; }
.download-layout { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.download-layout .eyebrow { color: #174b52; }
.download-layout p:last-child { margin-bottom: 0; color: #174b52; }
.light-button { background: #081012 !important; color: white !important; white-space: nowrap; }

.site-footer { padding: 70px 0 24px; background: #08090b; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 70px; }
.footer-grid h3 { margin: 0 0 18px; font-size: 14px; }
.footer-grid > div:not(.footer-brand) a { display: block; margin: 11px 0; color: #929b9d; font-size: 13px; }
.footer-brand p { color: #7f888a; font-size: 13px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 52px; padding-top: 20px; border-top: 1px solid #24282b; color: #697174; font-size: 12px; }

.page-hero { padding: 148px 0 68px; background: #171b1e; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 820px; margin: 0; font-size: 52px; }
.page-hero p { max-width: 700px; color: var(--muted); line-height: 1.8; }
.page-main { min-height: 65vh; padding: 72px 0; background: var(--paper); color: var(--dark-text); }
.download-panel { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; padding: 32px; border: 1px solid var(--paper-line); border-radius: 8px; background: white; }
.download-panel h2 { margin: 0 0 8px; }
.download-panel p { color: var(--dark-muted); }
.release-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 20px; color: #4d5759; font-size: 13px; }
.notice { margin-top: 20px; padding: 16px; background: #fff7dc; border-left: 4px solid var(--yellow); color: #53461f; line-height: 1.7; }
.legal-shell { display: grid; grid-template-columns: 260px 1fr; gap: 32px; align-items: start; }
.legal-menu { position: sticky; top: 94px; padding: 10px; background: white; border: 1px solid var(--paper-line); border-radius: 6px; }
.legal-menu a { display: block; padding: 10px; color: #4e585a; font-size: 13px; border-radius: 4px; }
.legal-menu a.active { background: #e7f4f4; color: #176b77; font-weight: 800; }
.legal-content { min-width: 0; padding: 36px 44px; background: white; border: 1px solid var(--paper-line); border-radius: 6px; }
.legal-content h1 { margin-top: 0; font-size: 32px; }
.legal-content h2 { margin-top: 34px; font-size: 21px; }
.legal-content p, .legal-content li { line-height: 1.8; color: #40494b; }
.legal-content table { width: 100%; border-collapse: collapse; font-size: 13px; }
.legal-content th, .legal-content td { padding: 10px; border: 1px solid var(--paper-line); text-align: left; vertical-align: top; }
.legal-content blockquote { margin: 20px 0; padding: 12px 16px; border-left: 4px solid var(--coral); background: #fff1ee; }

@media (max-width: 960px) {
  .site-nav { position: fixed; top: 68px; left: 0; right: 0; display: none; padding: 18px 24px 24px; background: #0d0f11; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 8px; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px; }
  .menu-button { display: grid; }
  .split-heading, .product-layout, .cloud-showcase, .responsible-layout, .faq-layout, .contact-layout { grid-template-columns: 1fr; gap: 42px; }
  .wechat-card { justify-self: start; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-list { grid-template-columns: repeat(2, 1fr); }
  .workflow-list li:nth-child(2) { border-right: 0; }
  .workflow-list li:nth-child(-n+2) { border-bottom: 1px solid #cbd1d0; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2; }
  .legal-shell { grid-template-columns: 1fr; }
  .legal-menu { position: static; display: grid; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 30px, var(--shell)); }
  .site-header { height: 62px; padding: 0 15px; }
  .site-nav { top: 62px; }
  .brand { font-size: 16px; }
  .hero { min-height: 82vh; background-position: 42% top; }
  .hero-content { padding: 120px 0 52px; }
  .hero h1 { font-size: 54px; }
  .hero-lead { font-size: 17px; line-height: 1.65; }
  .hero-actions .button { width: 100%; }
  .hero-facts { grid-template-columns: 1fr 1fr; gap: 18px 12px; }
  .scroll-cue { display: none; }
  .section, .product-band { padding: 72px 0; }
  .section-heading h2, .product-copy h2, .cloud-copy h2, .responsible-layout h2, .download-layout h2 { font-size: 31px; }
  .feature-grid { grid-template-columns: 1fr; }
  .cloud-copy h2 { font-size: 38px; }
  .compute-cards { grid-template-columns: 1fr; }
  .compute-console { padding: 18px; }
  .engine-row { grid-template-columns: 58px 1fr auto; gap: 10px; padding: 12px; }
  .console-specs { grid-template-columns: 1fr; }
  .contact-layout { gap: 34px; }
  .contact-copy h2 { font-size: 32px; }
  .wechat-card { width: min(100%, 320px); justify-self: center; }
  .feature-card { min-height: auto; }
  .feature-card p { min-height: 0; }
  .workflow-list { grid-template-columns: 1fr; }
  .workflow-list li { min-height: 230px; border-right: 0; border-bottom: 1px solid #cbd1d0; }
  .workflow-list li:last-child { border-bottom: 0; }
  .responsible-layout { gap: 28px; }
  .download-layout, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .download-layout .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
  .page-hero { padding: 120px 0 52px; }
  .page-hero h1 { font-size: 38px; }
  .download-panel { grid-template-columns: 1fr; padding: 22px; }
  .legal-menu { grid-template-columns: 1fr; }
  .legal-content { padding: 24px 18px; overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}