:root {
  --ai-paper: #191919;
  --ai-surface: #232323;
  --ai-line: #383838;
  --ai-ink: #fff5ed;
  --ai-muted: #b8b8b8;
  --ai-accent: #87e64b;
}
body.is-ai-hub { background: var(--ai-paper); }
.page.page-ai-hub { width: 100%; max-width: none; margin: 0; padding: 0; }
.ai-hub, .ai-hub * { box-sizing: border-box; }
.ai-hub { overflow: clip; color: var(--ai-ink); background: var(--ai-paper); font-family: var(--ai-font-latin, Arial), var(--ai-font-chinese, "Noto Sans SC"), "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.5; }
.ai-hub [hidden] { display: none !important; }
.ai-hub a { color: inherit; text-decoration: none; }
.ai-hub button, .ai-hub textarea, .ai-hub select { font: inherit; }
body.is-ai-hub .ai-hub :is(button,input,select,textarea) { font-family: inherit !important; }
.ai-hub button, .ai-hub summary, .ai-hub select { -webkit-tap-highlight-color: transparent; }
.ai-hub button, .ai-hub select, .ai-hub summary { cursor: pointer; }
.ai-hub button { color: inherit; }
.ai-hub button:disabled { cursor: not-allowed; }
.ai-hub svg { flex-shrink: 0; width: 20px; height: 20px; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.ai-hub :is(a,button,summary,select,textarea):focus-visible { outline: 2px solid var(--ai-accent); outline-offset: 4px; }
.ai-hub :is(a,button) { touch-action: manipulation; }
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.ai-hub__local-nav { position: relative; z-index: 10; display: flex; align-items: center; width: 100%; height: 80px; padding: 0 32px; border-bottom: 1px solid #414141; gap: 32px; }
.ai-hub__home-link { display: inline-flex; align-items: center; gap: 5px; flex-shrink: 0; }
.ai-hub__home-link strong { font-size: 29px; line-height: 1; letter-spacing: -1.3px; }
.ai-hub__home-link strong span { font-size: 16px; letter-spacing: -.5px; }
.ai-hub__spark { display: grid; place-items: center; color: var(--ai-accent); }
.ai-hub__spark svg { width: 28px; height: 32px; stroke-width: 1; fill: currentColor; transform: rotate(-9deg); }
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.ai-hub__tool-links > a:hover, .ai-hub__nav-actions > a:not(.ai-hub__workspace-link):hover { color: var(--ai-accent); }
.ai-hub__tool-links svg, .ai-nav-menu summary svg { width: 12px; height: 12px; color: #aaa; }
.ai-nav-menu { position: relative; }
.ai-nav-menu summary { list-style: none; }
.ai-nav-menu summary::-webkit-details-marker { display: none; }
.ai-nav-menu[open] summary svg { transform: rotate(180deg); }
.ai-nav-menu > div { position: absolute; top: 52px; left: -16px; width: 220px; padding: 9px; border: 1px solid #414141; border-radius: 10px; background: #272727; box-shadow: 0 12px 30px #0005; }
.ai-nav-menu > div a { display: flex; align-items: center; gap: 12px; min-height: 46px; padding: 0 12px; border-radius: 6px; }
.ai-nav-menu > div a:hover { background: #383838; }
.ai-hub__nav-actions { display: flex; align-items: center; gap: 24px; white-space: nowrap; font-weight: 600; }
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.ai-hub__workspace-link svg, .ai-button svg { width: 17px; height: 17px; stroke-width: 1.4; }
.ai-hub__workspace-link:hover, .ai-button:hover, .ai-direct-generator__submit:hover { background: #9bef63; }
.ai-direct-hero { width: 100%; margin: 0 auto; padding: 0 32px; }
.ai-direct-hero__crumbs { display: flex; align-items: center; justify-content: center; gap: 8px; height: 69px; padding-top: 16px; font-size: 14px; color: #e0e0e0; }
.ai-direct-hero__crumbs > span[aria-hidden] { color: var(--ai-accent); }
.ai-direct-hero h1 { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; min-width: 0; margin: 16px auto 63px; font-size: 48px; font-weight: 600; line-height: 48px; letter-spacing: -1.5px; text-align: center; }
.ai-direct-hero__accent { color: var(--ai-accent); }
.ai-direct-hero__ai { position: relative; padding-right: 16px; }
.ai-direct-hero__ai b { position: absolute; top: -5px; right: 0; font-size: 20px; line-height: 1; }
.ai-direct-generator { position: relative; display: flex; flex-direction: column; width: min(952px, 100%); min-height: 186px; margin: 0 auto; padding: 8px; border: 1px solid #383838; border-radius: 28px; background: linear-gradient(155deg,#252525,#202020); }
.ai-direct-generator textarea { display: block; width: 100%; min-width: 0; height: 118px; min-height: 70px; padding: 9px 16px 16px; border: 0; border-radius: 16px 16px 0 0; outline: 0; resize: none; background: transparent; color: #fff; font-size: 14px; line-height: 24px; }
.ai-direct-generator textarea::placeholder { color: #949494; opacity: 1; }
.ai-direct-generator textarea:focus-visible { outline: none; }
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.ai-direct-generator__controls { display: flex; align-items: center; gap: 8px; min-width: 0; }
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.ai-direct-generator__add { width: 40px; padding: 0; }
.ai-direct-generator__add svg { width: 16px; height: 16px; }
.ai-select { padding-right: 11px; gap: 0; }
.ai-select select { appearance: none; min-width: 0; max-width: 150px; height: 40px; padding: 0 7px 0 12px; border: 0; border-radius: 999px; background: transparent; color: inherit; font-size: 14px; font-weight: 600; }
.ai-select option { color: #eee; background: #373737; }
.ai-select > svg:last-child { pointer-events: none; width: 12px; height: 12px; }
.ai-select--voice { padding-left: 5px; border-radius: 11px; background: #414141; }
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.ai-select__trigger > svg:last-child { width: 12px; height: 12px; pointer-events: none; }
.ai-select__trigger[aria-expanded="true"] > svg:last-child { transform: rotate(180deg); }
.ai-hub .ai-select__trigger:focus-visible { outline: none; border-color: var(--ai-accent); }
.ai-select__trigger:hover, .ai-select__trigger[aria-expanded="true"] { background: #444; }
.ai-hub .ai-select--voice .ai-select__trigger { padding-left: 4px; }
.ai-select--voice .ai-select__trigger > svg:first-child { width: 32px; height: 32px; padding: 5px; border-radius: 7px; background: #367e7c; color: #173f3d; }
.ai-select-menu, .ai-select-menu * { box-sizing: border-box; }
.ai-select-menu { position: fixed; z-index: 1000; overflow-y: auto; overscroll-behavior: contain; padding: 6px; border: 1px solid #4a4a4a; border-radius: 14px; background: #292929; box-shadow: 0 12px 32px #0006; color: #e6e6e6; font-family: var(--ai-font-latin, Arial), var(--ai-font-chinese, "Noto Sans SC"), "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; font-weight: 600; line-height: 1.5; scrollbar-width: thin; scrollbar-color: #666 transparent; }
.ai-select-menu[hidden] { display: none !important; }
.ai-select-menu__option { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 40px; padding: 8px 12px; border-radius: 8px; cursor: pointer; touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
.ai-select-menu__option::after { width: 14px; content: ""; }
.ai-select-menu__option[aria-selected="true"] { color: #a3ed75; }
.ai-select-menu__option[aria-selected="true"]::after { content: "✓"; }
.ai-select-menu__option:hover, .ai-select-menu__option.is-active { background: #414141; }
.ai-control { padding: 0 14px; }
.ai-control[aria-pressed="true"] { background: #45533b; color: #b9f095 !important; }
.ai-control--static { cursor: default; }
.ai-direct-generator__submit { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; gap: 9px; min-width: 205px; min-height: 40px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--ai-accent); color: #151515 !important; font-size: 14px; font-weight: 600; }
.ai-direct-generator__submit svg { width: 15px; height: 15px; fill: currentColor; stroke-width: .8; }
.ai-direct-generator__frames { display: flex; gap: 8px; margin-bottom: 7px; }
.ai-direct-generator__frames button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; width: 103px; height: 64px; padding: 0; border: 0; border-radius: 12px; color: #aaa; background: #3b3b3b; }
.ai-direct-generator__frames svg { width: 20px; height: 20px; }
.ai-direct-generator__frames button:disabled { opacity: .38; }
.ai-direct-hero--video h1 { margin-bottom: 81px; }
.ai-direct-hero--video .ai-direct-generator { width: min(984px,100%); min-height: 188px; border-radius: 28px; }
.ai-direct-hero--video textarea { height: 58px; min-height: 58px; padding: 7px 16px 8px; line-height: 21px; }
.ai-direct-hero--audio .ai-direct-generator { min-height: 189px; }
.ai-direct-hero--audio textarea { height: 121px; }
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.ai-file-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
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.ai-direct-gallery__item:hover .ai-direct-gallery__play { background: #ffffff66; }
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.ai-workflow--motion .ai-button { border-radius: 999px; }
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.ai-tool-card { position: relative; display: block; overflow: hidden; border: 1px solid #424242; border-radius: 16px; background: #2c3029; }
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.ai-tool-card:hover > img { transform: scale(1.025); }
.ai-tool-card--image { grid-column: 1 / 3; }
.ai-tool-card--video { grid-column: 3; grid-row: 1 / 3; }
.ai-tool-card--voice { grid-column: 1 / 3; }
.ai-tool-card--chat { grid-column: 2; }
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.ai-tool-card__chat-art i { height: 13px; border-radius: 4px; background: #727a69; }
.ai-tool-card__chat-art i:nth-child(2n) { width: 70%; margin-left: auto; background: #87e64b80; }
.ai-voice-preview { display: flex; overflow: hidden; min-height: 410px; border-radius: 16px; background: #353633; }
.ai-voice-preview > img { width: 45%; height: 410px; object-fit: cover; }
.ai-voice-preview > div { display: flex; flex-direction: column; align-items: start; justify-content: center; width: 55%; padding: 32px 28px; }
.ai-voice-preview strong { margin: 18px 0 40px; font-size: 30px; line-height: 1.4; }
.ai-voice-preview > div > span { font-size: 12px; color: #bbb; }
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.ai-wave i { height: var(--bar); flex: 1; max-width: 4px; border-radius: 2px; background: var(--ai-accent); }
.ai-conversation-preview { display: grid; gap: 32px; min-height: 410px; padding: 42px 36px; border: 1px solid #414141; border-radius: 16px; background: #242624; }
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.ai-faq h2 { margin: 14px 0 0; font-size: 30px; line-height: 1.2; font-weight: 600; }
.ai-faq details { border-bottom: 1px solid #414141; }
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.ai-faq summary::-webkit-details-marker { display: none; }
.ai-faq summary svg { width: 21px; height: 21px; }
.ai-faq details[open] summary svg { transform: rotate(180deg); }
.ai-faq p { margin: 0; padding: 0 24px 20px 0; color: var(--ai-muted); font-size: 14px; line-height: 1.7; }
.ai-final-cta { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 370px; padding: 48px 24px 64px; border-top: 1px solid #303030; text-align: center; }
.ai-final-cta__brand { display: flex; align-items: center; gap: 10px; font-size: 27px; font-weight: 600; }
.ai-final-cta__brand svg { color: var(--ai-accent); width: 30px; height: 30px; }
.ai-final-cta h2 { margin: 24px 0 30px; font-size: 48px; font-weight: 600; line-height: 1.2; }
.ai-hub__footer { display: flex; align-items: center; gap: 32px; min-height: 120px; padding: 28px 32px; border-top: 1px solid #414141; color: #bbb; font-size: 13px; }
.ai-hub__footer > a:first-child { color: white; font-size: 24px; font-weight: 700; }
.ai-hub__footer > span { flex: 1; }
.ai-hub__not-found { display: grid; justify-items: center; align-content: center; min-height: 70vh; padding: 30px; text-align: center; }
.ai-hub__not-found > span { color: var(--ai-accent); font-size: 64px; font-weight: 700; }
@media (max-width: 1200px) {
  .ai-workflow--motion { padding: 40px 32px; gap: 32px; }
  .ai-hub__local-nav { gap: 24px; padding: 0 24px; }
  .ai-hub__tool-links { gap: 20px; }
  .ai-hub__tool-links > a:last-child { display: none; }
  .ai-hub__nav-actions > a:not(.ai-hub__workspace-link) { display: none; }
  .ai-hub__workspace-link { padding: 0 18px; }
  .ai-direct-models { gap: 24px; overflow-x: auto; justify-content: start; scrollbar-width: none; }
  .ai-direct-models strong { font-size: 16px; }
  .ai-capability { font-size: 16px; }
  .ai-chat-sample { padding: 22px 18px; }
  .ai-chat-sample strong { font-size: 22px; }
  .ai-chat-sample__lines { gap: 9px; margin: 20px 0; }
}
@media (max-width: 980px) {
  .ai-direct-hero h1 { font-size: 38px; line-height: 1.2; letter-spacing: -1px; }
  .ai-hub__tool-links { gap: 16px; }
  .ai-hub__tool-links > a { display: none; }
  .ai-direct-gallery { grid-template-columns: 3fr 2fr 3fr 2fr 3fr; gap: 10px; }
  .ai-direct-gallery__item { border-radius: 12px; }
  .ai-direct-gallery__item:nth-child(2), .ai-direct-gallery__item:nth-child(4) { margin-top: 24px; }
  .ai-direct-gallery__item:nth-child(3) { margin-top: 12px; }
  .ai-direct-gallery__play { width: 44px; height: 44px; }
  .ai-feature-grid { gap: 28px; }
  .ai-feature-grid h3 { font-size: 18px; }
  .ai-feature-grid p { font-size: 14px; }
  .ai-workflow { gap: 32px; }
  .ai-workflow h2, .ai-section-heading h2 { font-size: 30px; }
  .ai-workflow h3 { font-size: 18px; }
  .ai-workflow li p { font-size: 14px; }
  .ai-tool-grid { grid-template-rows: 230px 230px; }
  .ai-chat-sample strong { font-size: 18px; }
  .ai-chat-sample__lines { gap: 7px; }
  .ai-chat-sample__action { display: none; }
}
@media (max-width: 760px) {
  .ai-hub__local-nav { height: 72px; padding: 0 20px; gap: 18px; }
  .ai-hub__home-link strong { font-size: 24px; }
  .ai-hub__home-link strong span { display: none; }
  .ai-hub__spark svg { width: 24px; height: 28px; }
  .ai-hub__tool-links { flex: 1; justify-content: end; }
  .ai-nav-menu summary { font-size: 12px; }
  .ai-nav-menu > div { right: -12px; left: auto; }
  .ai-hub__workspace-link { min-height: 38px; padding: 0 12px; font-size: 12px; gap: 7px; }
  .ai-hub__workspace-link svg { display: none; }
  .ai-direct-hero { padding: 0 20px; }
  .ai-direct-hero__crumbs { height: 65px; padding-top: 8px; font-size: 12px; }
  .ai-direct-hero h1 { display: block; margin: 16px auto 40px; font-size: 34px; line-height: 1.24; letter-spacing: -1px; overflow-wrap: anywhere; }
  .ai-direct-hero h1 > span { display: block; }
  .ai-direct-hero h1 > span + span { margin-top: 7px; }
  .ai-direct-hero__ai { padding-right: 13px; }
  .ai-direct-hero__ai b { top: -2px; font-size: 16px; }
  .ai-direct-hero--video h1 { margin-bottom: 40px; }
  .ai-direct-generator { min-height: 220px; border-radius: 24px; }
  .ai-direct-generator textarea { height: 110px; padding: 10px 12px; }
  .ai-direct-generator__footer { display: grid; gap: 12px; }
  .ai-direct-generator__controls { overflow-x: auto; scrollbar-width: none; min-height: 40px; padding: 0 1px; gap: 6px; }
  .ai-select, .ai-control { flex-shrink: 0; }
  .ai-select select { font-size: 12px; padding-left: 10px; padding-right: 4px; max-width: 125px; }
  .ai-select { padding-right: 7px; }
  .ai-select > svg:last-child { width: 10px; }
  .ai-hub .ai-select__trigger { gap: 4px; padding: 0 7px 0 10px; font-size: 12px; }
  .ai-select__trigger > svg:last-child { width: 10px; }
  .ai-direct-generator__submit { width: 100%; min-height: 44px; }
  .ai-direct-hero--video .ai-direct-generator { min-height: 264px; }
  .ai-direct-hero--video textarea { height: 70px; min-height: 70px; padding: 10px 12px; }
  .ai-direct-hero--audio .ai-direct-generator { min-height: 220px; }
  .ai-direct-hero--audio textarea { height: 110px; }
  .ai-direct-generator__frames button { height: 60px; width: 96px; font-size: 12px; }
  .ai-direct-models, .ai-direct-models--voice, .ai-direct-hero--video .ai-direct-models { height: 96px; gap: 24px; }
  .ai-direct-models strong { font-size: 14px; }
  .ai-direct-models--voice { justify-content: center; gap: 16px; }
  .ai-direct-models--voice strong { font-size: 12px; }
  .ai-direct-models--voice .ai-capability { font-size: 17px; }
  .ai-direct-gallery { grid-template-columns: 230px 154px 230px 154px 230px; gap: 12px; width: calc(100% + 40px); margin: 0 -20px; padding: 0 20px 8px; overflow-x: auto; scrollbar-width: none; }
  .ai-direct-gallery__item:nth-child(2), .ai-direct-gallery__item:nth-child(4) { margin-top: 30px; }
  .ai-direct-gallery__item:nth-child(3) { margin-top: 15px; }
  .ai-direct-gallery__play { width: 48px; height: 48px; }
  .ai-hub__mode-tabs { justify-content: start; overflow-x: auto; gap: 8px; margin: -8px 0 28px; white-space: nowrap; }
  .ai-hub__mode-tabs a { flex-shrink: 0; padding: 9px 12px; }
  .ai-chat-sample { padding: 26px 20px; }
  .ai-chat-sample strong { font-size: 24px; }
  .ai-chat-sample__lines { gap: 12px; margin: 26px 0; }
  .ai-chat-sample__action { display: flex; }
  .ai-chat-sample:nth-child(2n) strong { font-size: 21px; }
  .ai-feature-section { width: calc(100% - 40px); padding: 72px 0; }
  .ai-feature-section > h2 { margin-bottom: 36px; font-size: 26px; text-align: left; }
  .ai-feature-grid { grid-template-columns: 1fr; gap: 32px; }
  .ai-feature-icon { margin-bottom: 10px; }
  .ai-feature-grid h3 { font-size: 20px; }
  .ai-feature-grid p { max-width: none; font-size: 15px; }
  .ai-workflow { grid-template-columns: 1fr; gap: 36px; width: calc(100% - 40px); padding: 16px 0 72px; }
  .ai-workflow--motion { margin-bottom: 72px; padding: 28px 20px; gap: 28px; border-radius: 24px; }
  .ai-workflow h2 { font-size: 28px; }
  .ai-workflow ol { gap: 24px; }
  .ai-workflow h3 { font-size: 18px; }
  .ai-workflow li p { font-size: 15px; }
  .ai-toolkit { width: calc(100% - 40px); padding-bottom: 72px; }
  .ai-section-heading { display: block; }
  .ai-section-heading h2 { font-size: 28px; }
  .ai-section-heading p { font-size: 15px; }
  .ai-section-heading .ai-button { margin-top: 24px; }
  .ai-tool-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 230px 230px; gap: 12px; }
  .ai-tool-card--image { grid-column: 1; grid-row: auto; }
  .ai-tool-card--voice { grid-column: 1 / 3; grid-row: auto; }
  .ai-tool-card--video, .ai-tool-card--chat { grid-column: 2; grid-row: auto; }
  .ai-tool-card__badge { top: 12px; left: 12px; width: 34px; height: 34px; border-radius: 8px; }
  .ai-tool-card__title { right: 14px; bottom: 14px; left: 14px; font-size: 17px; }
  .ai-tool-card__title svg { width: 17px; height: 17px; }
  .ai-tool-card__chat-art { padding: 40px 16px; gap: 12px; }
  .ai-tool-card__chat-art i { height: 9px; }
  .ai-voice-preview { min-height: 330px; }
  .ai-voice-preview > img { height: 330px; }
  .ai-voice-preview > div { padding: 24px 18px; }
  .ai-voice-preview strong { font-size: 24px; }
  .ai-conversation-preview { padding: 28px 22px; }
  .ai-faq { grid-template-columns: 1fr; gap: 26px; width: calc(100% - 40px); padding: 0 0 72px; }
  .ai-faq h2 { margin: 0; font-size: 28px; }
  .ai-final-cta { min-height: 340px; padding: 48px 20px; }
  .ai-final-cta h2 { font-size: 30px; line-height: 1.35; }
  .ai-hub__footer { flex-wrap: wrap; gap: 20px; padding: 28px 20px; }
  .ai-hub__footer > span { flex-basis: calc(100% - 110px); }
}
@media (max-width: 360px) {
  .ai-hub__local-nav { padding: 0 14px; gap: 10px; }
  .ai-hub__home-link strong { font-size: 22px; }
  .ai-nav-menu summary { font-size: 11px; }
  .ai-hub__workspace-link { font-size: 11px; padding: 0 9px; }
  .ai-direct-hero h1 { font-size: 29px; }
  .ai-direct-generator__controls { gap: 5px; }
  .ai-direct-generator__add { width: 34px; min-width: 34px; }
  .ai-select select { font-size: 11px; padding-left: 8px; }
  .ai-hub .ai-select__trigger { padding-left: 8px; font-size: 11px; }
  .ai-control { padding: 0 10px; font-size: 12px; }
  .ai-tool-grid { grid-template-columns: 1fr; grid-template-rows: repeat(4,230px); }
  .ai-tool-card { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .ai-hub *, .ai-hub *::before, .ai-hub *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}