:root { color-scheme: light; font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif; color: #17242a; background: #f7f8f6; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #f7f8f6; }
a { color: inherit; text-decoration: none; }
.site-header { height: 70px; max-width: 1180px; margin: 0 auto; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: 0; }
.brand img { border-radius: 8px; }
.header-link { font-size: 14px; color: #446067; }
main { max-width: 1180px; margin: 0 auto; padding: 30px 28px 80px; }
.hero { min-height: 560px; padding: 86px 0 56px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .9fr); align-items: center; gap: 56px; }
.eyebrow { margin: 0 0 12px; color: #0e766e; font-size: 12px; font-weight: 800; letter-spacing: 1.2px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 18px; font-size: 68px; line-height: 1.05; letter-spacing: 0; }
h2 { margin-bottom: 12px; font-size: 36px; line-height: 1.2; letter-spacing: 0; }
.hero-description { max-width: 540px; color: #52656b; font-size: 20px; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { min-height: 44px; padding: 11px 16px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #c8d0ca; border-radius: 6px; font-size: 14px; font-weight: 700; transition: background-color .15s, border-color .15s; }
.button-primary { color: #fff; background: #0e766e; border-color: #0e766e; }
.button-primary:hover { background: #095e58; border-color: #095e58; }
.button-secondary { color: #264148; background: #fff; }
.button-secondary:hover { border-color: #0e766e; }
.is-disabled { pointer-events: none; opacity: .58; }
.hero-note, .muted, .release-meta { margin-top: 14px; color: #718087; font-size: 13px; line-height: 1.65; }
.canvas-preview { position: relative; min-height: 380px; border: 1px solid #cfd7d1; background: #fbfcfa; overflow: hidden; }
.canvas-preview::before { content: ""; position: absolute; inset: 0; border: 18px solid #f3f5f2; }
.preview-node { position: absolute; z-index: 1; min-width: 104px; padding: 13px 15px; border: 1px solid #cbd5cf; border-radius: 6px; background: #fff; box-shadow: 0 8px 24px rgba(27, 48, 43, .06); font-size: 13px; font-weight: 700; }
.preview-node::before, .preview-node::after { content: ""; position: absolute; top: 50%; width: 9px; height: 9px; margin-top: -5px; border: 2px solid currentColor; border-radius: 50%; background: #fff; }
.preview-node::before { left: -7px; }.preview-node::after { right: -7px; }
.start { left: 42px; top: 164px; color: #2c8c69; }.brief { left: 202px; top: 86px; color: #3a7ec8; }.ai { left: 202px; top: 244px; color: #8d6bc2; }.media { right: 34px; top: 204px; color: #c36b4d; }
.preview-lines { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; }.preview-lines path { fill: none; stroke: #8ca9a4; stroke-width: 3; }
.release-section { padding: 70px 0; display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; border-top: 1px solid #d7ded8; }
.release-section > div > p:not(.eyebrow) { color: #566a70; line-height: 1.7; }
.release-card { padding: 28px; border: 1px solid #cbd5cf; border-radius: 8px; background: #fff; }
.release-version { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }.release-version span { color: #718087; font-size: 14px; }.release-version strong { font-size: 32px; }
.release-notes { min-height: 76px; padding-left: 18px; color: #4a5c61; font-size: 14px; line-height: 1.8; }.release-notes li { margin: 3px 0; }
.features { padding: 70px 0 20px; border-top: 1px solid #d7ded8; }.section-heading { max-width: 680px; }.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 32px; }.feature-grid article { min-height: 190px; padding: 20px; border: 1px solid #cbd5cf; border-radius: 7px; background: #fff; }.feature-grid h3 { margin-bottom: 10px; font-size: 16px; }.feature-grid p { margin-bottom: 0; color: #607176; font-size: 13px; line-height: 1.75; }
footer { max-width: 1180px; margin: 0 auto; padding: 26px 28px 36px; display: flex; justify-content: space-between; color: #728187; font-size: 13px; border-top: 1px solid #d7ded8; }
@media (max-width: 820px) { .site-header, main, footer { padding-left: 20px; padding-right: 20px; }.hero, .release-section { grid-template-columns: 1fr; gap: 34px; }.hero { min-height: auto; padding-top: 50px; } h1 { font-size: 48px; }.canvas-preview { min-height: 330px; }.feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 480px) { .site-header { height: 60px; }.brand span { font-size: 14px; }.header-link { font-size: 12px; } h1 { font-size: 42px; }.hero-description { font-size: 17px; }.feature-grid { grid-template-columns: 1fr; } footer { gap: 8px; flex-direction: column; } }