:root {
        color-scheme: light dark;
        --page: #f3f4f5;
        --surface: #e9ebed;
        --surface-raised: #fafafa;
        --surface-strong: #dfe2e5;
        --text: #1d2024;
        --muted: #61676f;
        --quiet: #687078;
        --line: rgba(29, 32, 36, 0.12);
        --accent: #c34235;
        --accent-hover: #ad382d;
        --accent-ink: #faf7f5;
        --shadow: 0 24px 70px rgba(55, 62, 69, 0.13);
        --image-filter: saturate(0.88) contrast(1.02);
        --radius-card: 16px;
        --radius-control: 12px;
        --page-width: 1240px;
      }

      @media (prefers-color-scheme: dark) {
        :root {
          --page: #14161a;
          --surface: #1c1f24;
          --surface-raised: #23272d;
          --surface-strong: #2b3037;
          --text: #f0f1f2;
          --muted: #a9afb7;
          --quiet: #929ba6;
          --line: rgba(240, 241, 242, 0.12);
          --accent: #ee6a59;
          --accent-hover: #f17c6d;
          --accent-ink: #17191d;
          --shadow: 0 26px 80px rgba(2, 5, 9, 0.34);
          --image-filter: saturate(0.8) contrast(1.05) brightness(0.9);
        }
      }

      :root[data-theme="dark"] {
        --page: #14161a;
        --surface: #1c1f24;
        --surface-raised: #23272d;
        --surface-strong: #2b3037;
        --text: #f0f1f2;
        --muted: #a9afb7;
        --quiet: #777f88;
        --line: rgba(240, 241, 242, 0.12);
        --accent: #ee6a59;
        --accent-hover: #f17c6d;
        --accent-ink: #17191d;
        --shadow: 0 26px 80px rgba(2, 5, 9, 0.34);
        --image-filter: saturate(0.8) contrast(1.05) brightness(0.9);
      }

      :root[data-theme="light"] {
        --page: #f3f4f5;
        --surface: #e9ebed;
        --surface-raised: #fafafa;
        --surface-strong: #dfe2e5;
        --text: #1d2024;
        --muted: #61676f;
        --quiet: #878d94;
        --line: rgba(29, 32, 36, 0.12);
        --accent: #c34235;
        --accent-hover: #ad382d;
        --accent-ink: #faf7f5;
        --shadow: 0 24px 70px rgba(55, 62, 69, 0.13);
        --image-filter: saturate(0.88) contrast(1.02);
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        min-width: 320px;
        background: var(--page);
        color: var(--text);
        font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC",
          "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        font-synthesis: none;
        text-rendering: optimizeLegibility;
      }

      body::before {
        position: fixed;
        inset: 0;
        z-index: 20;
        pointer-events: none;
        content: "";
        opacity: 0.025;
        background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
      }

      a {
        color: inherit;
        text-decoration: none;
      }

      button,
      input {
        font: inherit;
      }

      button,
      a {
        -webkit-tap-highlight-color: transparent;
      }

      img {
        display: block;
        max-width: 100%;
      }

      .shell {
        width: min(calc(100% - 48px), var(--page-width));
        margin-inline: auto;
      }

      .site-header {
        position: sticky;
        top: 0;
        z-index: 10;
        border-bottom: 1px solid var(--line);
        background: color-mix(in srgb, var(--page) 88%, transparent);
        backdrop-filter: blur(18px) saturate(130%);
      }

      .nav {
        min-height: 72px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 28px;
      }

      .brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 19px;
        font-weight: 720;
        letter-spacing: -0.04em;
        white-space: nowrap;
      }

      .brand-mark {
        position: relative;
        width: 24px;
        height: 24px;
        border: 1px solid color-mix(in srgb, var(--accent) 65%, var(--line));
        border-radius: 50%;
      }

      .brand-mark::after {
        position: absolute;
        right: 3px;
        bottom: 2px;
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--accent);
        content: "";
      }

      .nav-links {
        display: flex;
        align-items: center;
        gap: 30px;
        margin-left: auto;
        font-size: 14px;
        color: var(--muted);
      }

      .nav-links a {
        transition: color 180ms ease;
      }

      .nav-links a:hover,
      .nav-links a:focus-visible {
        color: var(--text);
      }

      .nav-actions {
        display: flex;
        align-items: center;
        gap: 18px;
        white-space: nowrap;
      }

      .session-link {
        display: inline-flex;
        min-width: 44px;
        min-height: 44px;
        max-width: 180px;
        align-items: center;
        justify-content: center;
        gap: 8px;
        overflow: hidden;
        color: var(--muted);
        font-size: 14px;
        text-overflow: ellipsis;
      }

      .session-link:hover,
      .session-link:focus-visible {
        color: var(--text);
      }

      .session-dot {
        display: none;
        width: 7px;
        height: 7px;
        flex: 0 0 7px;
        border-radius: 50%;
        background: #2f9d63;
        box-shadow: 0 0 0 3px color-mix(in srgb, #2f9d63 14%, transparent);
      }

      .nav-actions[data-auth-state="authenticated"] .session-dot {
        display: block;
      }

      .session-label-full {
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .session-label-short {
        display: none;
      }

      .text-link {
        font-size: 14px;
        color: var(--muted);
      }

      .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 46px;
        padding: 0 20px;
        border: 1px solid transparent;
        border-radius: var(--radius-control);
        background: var(--accent);
        color: var(--accent-ink);
        font-weight: 700;
        line-height: 1;
        white-space: nowrap;
        cursor: pointer;
        transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1),
          background-color 180ms ease;
      }

      .button:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
      }

      .button:active {
        transform: translateY(1px) scale(0.99);
      }

      .button.secondary {
        border-color: var(--line);
        background: transparent;
        color: var(--text);
      }

      .button.secondary:hover {
        background: var(--surface);
      }

      .button.small {
        min-height: 44px;
        padding-inline: 17px;
        font-size: 14px;
      }

      .hero {
        display: grid;
        grid-template-columns: minmax(0, 0.88fr) minmax(500px, 1.12fr);
        align-items: center;
        gap: clamp(40px, 6vw, 92px);
        min-height: calc(100dvh - 73px);
        padding-block: clamp(40px, 6vh, 68px);
      }

      .eyebrow {
        margin: 0 0 22px;
        color: var(--accent);
        font-size: 12px;
        font-weight: 760;
        letter-spacing: 0.15em;
      }

      .hero h1 {
        max-width: 680px;
        margin: 0;
        font-size: clamp(48px, 5.2vw, 76px);
        font-weight: 760;
        letter-spacing: -0.065em;
        line-height: 1.04;
      }

      .hero h1 em {
        color: var(--accent);
        font-style: normal;
      }

      .hero h1 span,
      .hero h1 em {
        display: block;
      }

      .hero-copy > p:not(.eyebrow) {
        max-width: 460px;
        margin: 26px 0 0;
        color: var(--muted);
        font-size: clamp(17px, 1.45vw, 20px);
        line-height: 1.75;
      }

      .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin-top: 34px;
      }

      .hero-visual {
        position: relative;
        min-height: 620px;
      }

      .hero-photo {
        position: absolute;
        inset: 0 0 0 14%;
        overflow: hidden;
        border-radius: var(--radius-card);
        background: var(--surface);
        box-shadow: var(--shadow);
      }

      .hero-photo img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: 58% center;
        filter: var(--image-filter);
      }

      .chat-preview {
        position: absolute;
        left: 0;
        bottom: 34px;
        width: min(390px, 67%);
        overflow: hidden;
        border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
        border-radius: var(--radius-card);
        background: color-mix(in srgb, var(--surface-raised) 93%, transparent);
        box-shadow: var(--shadow);
        backdrop-filter: blur(22px) saturate(120%);
      }

      .chat-head {
        display: flex;
        align-items: center;
        gap: 11px;
        min-height: 58px;
        padding: 0 16px;
        border-bottom: 1px solid var(--line);
      }

      .chat-avatar {
        display: grid;
        width: 32px;
        height: 32px;
        place-items: center;
        border-radius: 50%;
        background: var(--accent);
        color: var(--accent-ink);
        font-size: 12px;
        font-weight: 800;
      }

      .chat-title {
        font-size: 13px;
        font-weight: 720;
      }

      .chat-messages {
        display: flex;
        flex-direction: column;
        gap: 10px;
        max-height: 320px;
        padding: 16px;
        overflow-y: auto;
      }

      .message {
        max-width: 84%;
        padding: 10px 12px;
        border-radius: var(--radius-control);
        background: var(--surface-strong);
        color: var(--text);
        font-size: 13px;
        line-height: 1.55;
      }

      .message.user {
        align-self: flex-end;
        background: var(--accent);
        color: var(--accent-ink);
      }

      .chat-form {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: 8px;
        padding: 12px;
        border-top: 1px solid var(--line);
      }

      .chat-form label {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0 0 0 0);
      }

      .chat-form input {
        min-width: 0;
        min-height: 44px;
        padding: 0 12px;
        border: 1px solid var(--line);
        border-radius: var(--radius-control);
        outline: none;
        background: var(--surface);
        color: var(--text);
      }

      .chat-form input::placeholder {
        color: var(--quiet);
      }

      .chat-form input:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
      }

      .chat-form button {
        min-height: 40px;
        padding: 0 14px;
        border: 0;
        border-radius: var(--radius-control);
        background: var(--text);
        color: var(--page);
        font-weight: 700;
        cursor: pointer;
      }

      .chat-form button:disabled {
        cursor: wait;
        opacity: 0.58;
      }

      .chat-demo-cta {
        display: flex;
        min-height: 44px;
        align-items: center;
        justify-content: center;
        border-top: 1px solid var(--line);
        color: var(--text);
        font-size: 12px;
        font-weight: 700;
        text-decoration: none;
      }

      .chat-demo-cta:hover {
        color: var(--accent);
      }

      .chat-demo-cta:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: -4px;
      }

      .confidence {
        border-block: 1px solid var(--line);
      }

      .confidence-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
      }

      .confidence-item {
        min-height: 126px;
        padding: 28px 28px 26px 0;
      }

      .confidence-item + .confidence-item {
        padding-left: 28px;
        border-left: 1px solid var(--line);
      }

      .confidence-item strong {
        display: block;
        margin-bottom: 9px;
        font-size: 16px;
        letter-spacing: -0.02em;
      }

      .confidence-item span {
        color: var(--muted);
        font-size: 13px;
        line-height: 1.65;
      }

      section.block {
        padding-block: clamp(88px, 11vw, 150px);
      }

      .section-heading {
        max-width: 760px;
        margin-bottom: 54px;
      }

      .section-heading h2 {
        margin: 0;
        font-size: clamp(36px, 4.2vw, 58px);
        letter-spacing: -0.055em;
        line-height: 1.08;
      }

      .section-heading p {
        max-width: 620px;
        margin: 20px 0 0;
        color: var(--muted);
        font-size: 17px;
        line-height: 1.75;
      }

      .how-layout {
        display: grid;
        grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
        gap: 22px;
        align-items: stretch;
      }

      .how-image {
        min-height: 590px;
        overflow: hidden;
        border-radius: var(--radius-card);
        background: var(--surface);
      }

      .how-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: var(--image-filter);
      }

      .how-list {
        display: grid;
        align-content: center;
        gap: 0;
        padding: 22px clamp(24px, 4vw, 56px);
        border-radius: var(--radius-card);
        background: var(--surface);
      }

      .how-item {
        padding-block: 30px;
      }

      .how-item + .how-item {
        border-top: 1px solid var(--line);
      }

      .how-item h3 {
        margin: 0 0 8px;
        font-size: 24px;
        letter-spacing: -0.035em;
      }

      .how-item p {
        margin: 0;
        color: var(--muted);
        line-height: 1.7;
      }

      .memory-grid {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        grid-template-rows: auto auto;
        gap: 18px;
      }

      .memory-cell {
        min-height: 290px;
        padding: clamp(28px, 4vw, 54px);
        border-radius: var(--radius-card);
        background: var(--surface);
      }

      .memory-cell h3 {
        max-width: 460px;
        margin: 0;
        font-size: clamp(28px, 3vw, 42px);
        letter-spacing: -0.045em;
        line-height: 1.12;
      }

      .memory-cell p {
        max-width: 520px;
        margin: 18px 0 0;
        color: var(--muted);
        line-height: 1.75;
      }

      .memory-cell.primary {
        grid-row: 1 / 3;
        min-height: 600px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        background:
          linear-gradient(160deg, color-mix(in srgb, var(--accent) 18%, transparent), transparent 52%),
          var(--surface-raised);
      }

      .memory-quote {
        max-width: 520px;
        margin: 0;
        color: var(--text);
        font-size: clamp(25px, 2.4vw, 38px);
        font-weight: 650;
        letter-spacing: -0.04em;
        line-height: 1.35;
      }

      .memory-context {
        display: grid;
        gap: 10px;
        margin-top: 62px;
      }

      .memory-context div {
        display: grid;
        grid-template-columns: 110px 1fr;
        gap: 18px;
        padding-top: 14px;
        border-top: 1px solid var(--line);
        color: var(--muted);
        font-size: 13px;
        line-height: 1.6;
      }

      .memory-context strong {
        color: var(--text);
        font-weight: 680;
      }

      .control-wrap {
        display: grid;
        grid-template-columns: minmax(0, 0.82fr) minmax(520px, 1.18fr);
        gap: clamp(38px, 7vw, 96px);
        align-items: center;
      }

      .control-copy h2 {
        margin: 0;
        font-size: clamp(38px, 4.5vw, 60px);
        letter-spacing: -0.055em;
        line-height: 1.08;
      }

      .control-copy p {
        margin: 22px 0 0;
        color: var(--muted);
        font-size: 17px;
        line-height: 1.8;
      }

      .control-copy .text-link {
        display: inline-block;
        margin-top: 24px;
        color: var(--accent);
        font-weight: 700;
      }

      .account-preview {
        overflow: hidden;
        border: 1px solid var(--line);
        border-radius: var(--radius-card);
        background: var(--surface-raised);
        box-shadow: var(--shadow);
      }

      .account-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 24px 26px;
        border-bottom: 1px solid var(--line);
      }

      .account-head strong {
        font-size: 17px;
      }

      .account-head span {
        color: var(--muted);
        font-size: 12px;
      }

      .account-body {
        padding: 12px 26px 22px;
      }

      .account-row {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: 24px;
        align-items: center;
        min-height: 78px;
        border-bottom: 1px solid var(--line);
      }

      .account-row:last-child {
        border-bottom: 0;
      }

      .account-row strong {
        display: block;
        margin-bottom: 5px;
        font-size: 14px;
      }

      .account-row span {
        color: var(--muted);
        font-size: 12px;
      }

      .account-value {
        color: var(--text) !important;
        font-size: 15px !important;
        font-weight: 700;
        text-align: right;
      }

      .account-value.accent {
        color: var(--accent) !important;
      }

      .pricing-section {
        border-top: 1px solid var(--line);
      }

      .pricing-heading {
        display: grid;
        grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
        gap: clamp(28px, 7vw, 100px);
        align-items: end;
        margin-bottom: 42px;
      }

      .pricing-heading h2 {
        max-width: 790px;
        margin: 10px 0 0;
        font-size: clamp(40px, 5.4vw, 72px);
        letter-spacing: -0.062em;
        line-height: 1.02;
      }

      .pricing-heading > p {
        max-width: 45ch;
        margin: 0;
        color: var(--muted);
        line-height: 1.8;
      }

      .pricing-meters {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin-bottom: 46px;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
      }

      .pricing-meters > div {
        display: grid;
        grid-template-columns: auto auto minmax(0, 1fr);
        gap: 14px;
        align-items: baseline;
        padding: 20px 28px 20px 0;
      }

      .pricing-meters > div + div {
        border-left: 1px solid var(--line);
        padding-left: 28px;
      }

      .pricing-meters span {
        color: var(--accent);
        font-size: 11px;
        font-weight: 780;
        letter-spacing: 0.12em;
      }

      .pricing-meters strong {
        font-size: 15px;
      }

      .pricing-meters p {
        margin: 0;
        color: var(--muted);
        font-size: 13px;
        line-height: 1.65;
      }

      .pricing-catalog {
        display: grid;
        grid-template-columns: repeat(12, minmax(0, 1fr));
        gap: 16px;
        align-items: stretch;
      }

      .pricing-loading,
      .marketing-plan {
        min-width: 0;
        border: 1px solid var(--line);
        border-radius: var(--radius-card);
        padding: 28px;
        background: var(--surface);
      }

      .pricing-loading {
        grid-column: 1 / -1;
        display: grid;
        gap: 6px;
        color: var(--muted);
      }

      .pricing-loading strong { color: var(--text); }

      .marketing-plan {
        grid-column: span 3;
        display: grid;
        gap: 24px;
        align-content: start;
        min-height: 480px;
      }

      .marketing-plan.featured {
        grid-column: span 6;
        border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
        padding: clamp(28px, 4vw, 44px);
        background:
          linear-gradient(145deg, color-mix(in srgb, var(--accent) 8%, transparent), transparent 60%),
          var(--surface);
        box-shadow: 0 22px 60px rgba(31, 22, 18, 0.08);
      }

      .marketing-plan.usage-tier.featured {
        grid-column: span 3;
        padding: 28px;
      }

      .pricing-catalog[data-count="1"] .marketing-plan {
        grid-column: 1 / -1;
      }

      .pricing-catalog[data-count="2"] .marketing-plan {
        grid-column: span 6;
      }

      .marketing-plan-heading {
        min-width: 0;
      }

      .marketing-plan-topline {
        display: flex;
        min-height: 26px;
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
        justify-content: space-between;
      }

      .marketing-plan-audience {
        color: var(--accent);
        font-size: 12px;
        font-weight: 760;
        letter-spacing: 0.08em;
      }

      .marketing-plan-badge {
        border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
        border-radius: 999px;
        padding: 5px 9px;
        background: color-mix(in srgb, var(--accent) 8%, transparent);
        color: var(--text);
        font-size: 11px;
        font-weight: 720;
      }

      .marketing-plan h3 {
        margin: 18px 0 0;
        font-size: clamp(26px, 3vw, 38px);
        letter-spacing: -0.045em;
      }

      .marketing-plan-heading > p {
        min-height: 48px;
        margin: 10px 0 0;
        color: var(--muted);
        line-height: 1.65;
      }

      .marketing-plan .price {
        display: flex;
        align-items: baseline;
        margin: 0;
        color: var(--text);
      }

      .marketing-plan .price strong {
        font-size: clamp(42px, 4.5vw, 64px);
        letter-spacing: -0.07em;
        line-height: 1;
      }

      .marketing-plan .price span {
        margin-left: 8px;
        color: var(--muted);
        font-size: 13px;
      }

      .marketing-plan-details {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin: 0;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
      }

      .marketing-plan-details > div {
        padding: 15px 0;
      }

      .marketing-plan-details > div + div {
        border-left: 1px solid var(--line);
        padding-left: 16px;
      }

      .marketing-plan-details dt {
        color: var(--muted);
        font-size: 11px;
      }

      .marketing-plan-details dd {
        margin: 6px 0 0;
        color: var(--text);
        font-size: 17px;
        font-weight: 740;
      }

      .marketing-plan-note {
        min-height: 0 !important;
        margin: -8px 0 0 !important;
        color: var(--muted);
        font-size: 12px;
      }

      .marketing-plan .button { width: 100%; margin-top: auto; }

      .marketing-cycle-dialog {
        width: min(calc(100% - 32px), 680px);
        max-height: min(780px, calc(100dvh - 32px));
        overflow: auto;
        border: 1px solid var(--line);
        border-radius: 24px;
        padding: 0;
        background: var(--surface);
        color: var(--text);
        box-shadow: 0 30px 100px rgba(31, 22, 18, 0.22);
      }

      .marketing-cycle-dialog::backdrop {
        background: rgba(25, 20, 18, 0.52);
        backdrop-filter: blur(8px);
      }

      .marketing-cycle-head {
        display: flex;
        gap: 24px;
        align-items: flex-start;
        justify-content: space-between;
        border-bottom: 1px solid var(--line);
        padding: 28px 30px 24px;
      }

      .marketing-cycle-head > div > span {
        color: var(--accent);
        font-size: 11px;
        font-weight: 780;
        letter-spacing: 0.12em;
      }

      .marketing-cycle-head h3 {
        margin: 8px 0 0;
        font-size: 30px;
        letter-spacing: -0.04em;
      }

      .marketing-cycle-head p {
        margin: 8px 0 0;
        color: var(--muted);
        font-size: 13px;
        line-height: 1.65;
      }

      .marketing-cycle-head button {
        flex: 0 0 auto;
        width: 38px;
        height: 38px;
        border: 1px solid var(--line);
        border-radius: 999px;
        background: transparent;
        color: var(--text);
        font-size: 22px;
        cursor: pointer;
        transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
      }

      .marketing-cycle-head button:hover {
        border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
        background: color-mix(in srgb, var(--accent) 7%, transparent);
        transform: rotate(4deg);
      }

      .marketing-cycle-options {
        display: grid;
        gap: 10px;
        padding: 24px 30px 0;
      }

      .marketing-cycle-option {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto auto;
        gap: 16px;
        align-items: center;
        border: 1px solid var(--line);
        border-radius: 15px;
        padding: 17px 18px;
        background: color-mix(in srgb, var(--surface) 92%, var(--page));
      }

      .marketing-cycle-option strong,
      .marketing-cycle-option small { display: block; }

      .marketing-cycle-option small {
        margin-top: 5px;
        color: var(--muted);
        font-size: 12px;
      }

      .marketing-cycle-option b {
        font-size: 19px;
        white-space: nowrap;
      }

      .marketing-cycle-option > span {
        min-width: 64px;
        color: var(--accent);
        font-size: 12px;
        font-weight: 740;
        text-align: right;
      }

      .marketing-cycle-note {
        margin: 18px 30px 0;
        color: var(--muted);
        font-size: 12px;
        line-height: 1.7;
      }

      .marketing-cycle-cta {
        width: calc(100% - 60px);
        margin: 20px 30px 30px;
      }

      .pricing-aftercare {
        max-width: 66ch;
        margin: 24px auto 0;
        color: var(--muted);
        font-size: 13px;
        line-height: 1.7;
        text-align: center;
      }

      .plan {
        display: grid;
        grid-template-columns: 0.75fr 1.25fr;
        gap: 34px;
        padding: clamp(30px, 5vw, 62px);
        border-radius: var(--radius-card);
        background: var(--text);
        color: var(--page);
      }

      .plan h3,
      .topup h3 {
        margin: 0;
        font-size: 28px;
        letter-spacing: -0.04em;
      }

      .price {
        margin-top: 26px;
        font-size: clamp(48px, 5vw, 70px);
        font-weight: 760;
        letter-spacing: -0.06em;
        line-height: 1;
      }

      .price span {
        margin-left: 8px;
        font-size: 14px;
        font-weight: 550;
        letter-spacing: 0;
        opacity: 0.7;
      }

      .plan-note {
        margin: 14px 0 0;
        opacity: 0.7;
        line-height: 1.7;
      }

      .plan-details {
        display: grid;
        align-content: center;
        gap: 0;
      }

      .plan-line {
        display: flex;
        justify-content: space-between;
        gap: 24px;
        padding: 17px 0;
        border-bottom: 1px solid color-mix(in srgb, var(--page) 18%, transparent);
        font-size: 14px;
      }

      .plan-line:last-of-type {
        border-bottom: 0;
      }

      .plan-line span {
        opacity: 0.68;
      }

      .plan .button {
        width: 100%;
        margin-top: 22px;
        background: var(--accent);
        color: var(--accent-ink);
      }

      .topup {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        padding: clamp(30px, 4vw, 48px);
        border-radius: var(--radius-card);
        background:
          linear-gradient(150deg, color-mix(in srgb, var(--accent) 22%, transparent), transparent 58%),
          var(--surface);
      }

      .topup p {
        margin: 18px 0 0;
        color: var(--muted);
        line-height: 1.75;
      }

      .topup strong {
        display: block;
        margin-top: 64px;
        font-size: clamp(31px, 4vw, 48px);
        letter-spacing: -0.05em;
        line-height: 1.05;
      }

      .topup small {
        display: block;
        margin-top: 14px;
        color: var(--muted);
        line-height: 1.6;
      }

      .growth-marketing-section {
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
        background:
          radial-gradient(circle at 78% 42%, color-mix(in srgb, var(--accent) 11%, transparent), transparent 31%),
          var(--page);
      }

      .growth-marketing {
        display: grid;
        grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
        gap: clamp(48px, 8vw, 112px);
        align-items: center;
      }

      .growth-marketing-copy h2 {
        max-width: 12ch;
        margin: 12px 0 0;
        font-size: clamp(40px, 5vw, 68px);
        letter-spacing: -0.06em;
        line-height: 1.03;
      }

      .growth-marketing-copy > p {
        max-width: 49ch;
        margin: 24px 0 0;
        color: var(--muted);
        font-size: 16px;
        line-height: 1.8;
      }

      .growth-marketing-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px 22px;
        align-items: center;
        margin-top: 30px;
      }

      .growth-marketing-assurance {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        margin-top: 42px;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
      }

      .growth-marketing-assurance span {
        padding: 15px 14px;
        color: var(--muted);
        font-size: 12px;
        text-align: center;
      }

      .growth-marketing-assurance span + span {
        border-left: 1px solid var(--line);
      }

      .growth-offer {
        overflow: hidden;
        border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--line));
        border-radius: var(--radius-card);
        background: color-mix(in srgb, var(--surface) 94%, var(--accent));
        box-shadow: 0 28px 70px rgba(0, 0, 0, 0.22);
      }

      .growth-offer-heading {
        padding: clamp(28px, 4vw, 44px);
        border-bottom: 1px solid var(--line);
      }

      .growth-offer-heading span {
        color: var(--accent);
        font-size: 11px;
        font-weight: 780;
        letter-spacing: 0.12em;
      }

      .growth-offer-heading strong {
        display: block;
        margin-top: 14px;
        font-size: clamp(31px, 4vw, 48px);
        letter-spacing: -0.05em;
        line-height: 1.05;
      }

      .growth-offer-description {
        margin: 0;
        padding: 18px clamp(28px, 4vw, 44px) 0;
        color: var(--muted);
        font-size: 14px;
        line-height: 1.7;
      }

      .growth-path {
        margin: 0;
        padding: 0 clamp(28px, 4vw, 44px);
        list-style: none;
        counter-reset: growth-path;
      }

      .growth-path li {
        display: grid;
        grid-template-columns: 30px minmax(0, 1fr);
        gap: 14px;
        align-items: baseline;
        padding: 20px 0;
        border-bottom: 1px solid var(--line);
        color: var(--text);
        font-size: 14px;
        line-height: 1.65;
        counter-increment: growth-path;
      }

      .growth-path li::before {
        color: var(--accent);
        font-size: 12px;
        font-weight: 780;
        content: "0" counter(growth-path);
      }

      .growth-path li span,
      .growth-path li strong {
        display: block;
      }

      .growth-path li strong {
        margin-bottom: 3px;
        color: var(--text);
      }

      .growth-path li span {
        color: var(--muted);
      }

      .growth-offer-note {
        margin: 0;
        padding: 20px clamp(28px, 4vw, 44px) 26px;
        color: var(--muted);
        font-size: 12px;
        line-height: 1.7;
      }

      .faq-grid {
        display: grid;
        grid-template-columns: 0.72fr 1.28fr;
        gap: clamp(40px, 8vw, 120px);
      }

      .faq-grid h2 {
        margin: 0;
        font-size: clamp(38px, 4vw, 56px);
        letter-spacing: -0.055em;
        line-height: 1.08;
      }

      details {
        padding: 24px 0;
        border-bottom: 1px solid var(--line);
      }

      details:first-child {
        border-top: 1px solid var(--line);
      }

      summary {
        display: flex;
        justify-content: space-between;
        gap: 24px;
        list-style: none;
        font-size: 17px;
        font-weight: 680;
        cursor: pointer;
      }

      summary::-webkit-details-marker {
        display: none;
      }

      summary::after {
        color: var(--accent);
        content: "+";
        font-size: 22px;
        font-weight: 450;
      }

      details[open] summary::after {
        content: "−";
      }

      details p {
        max-width: 610px;
        margin: 16px 0 0;
        color: var(--muted);
        line-height: 1.75;
      }

      .final-cta {
        padding: clamp(62px, 8vw, 96px);
        border-radius: var(--radius-card);
        background:
          linear-gradient(130deg, color-mix(in srgb, var(--accent) 26%, transparent), transparent 52%),
          var(--surface-raised);
      }

      .final-cta h2 {
        max-width: 800px;
        margin: 0;
        font-size: clamp(42px, 5.3vw, 72px);
        letter-spacing: -0.06em;
        line-height: 1.04;
      }

      .final-cta p {
        margin: 22px 0 32px;
        color: var(--muted);
        font-size: 17px;
        line-height: 1.7;
      }

      footer {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: 24px;
        align-items: end;
        padding-block: 42px;
        color: var(--muted);
        font-size: 12px;
      }

      .footer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
      }

      .reveal {
        opacity: 0;
        transform: translateY(22px);
      }

      .reveal.visible {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 650ms cubic-bezier(0.16, 1, 0.3, 1),
          transform 650ms cubic-bezier(0.16, 1, 0.3, 1);
      }

      .hero-copy,
      .hero-photo,
      .chat-preview {
        animation: enter 720ms cubic-bezier(0.16, 1, 0.3, 1) both;
      }

      .hero-photo {
        animation-delay: 90ms;
      }

      .chat-preview {
        animation-delay: 190ms;
      }

      @keyframes enter {
        from {
          opacity: 0;
          transform: translateY(20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @media (max-width: 980px) {
        .nav-links {
          display: none;
        }

        .hero {
          grid-template-columns: 1fr;
          padding-block: 64px 80px;
        }

        .hero-copy {
          max-width: 720px;
        }

        .hero-visual {
          min-height: 620px;
        }

        .how-layout,
        .control-wrap,
        .pricing-layout,
        .pricing-heading,
        .pricing-catalog,
        .growth-marketing,
        .faq-grid {
          grid-template-columns: 1fr;
        }

        .growth-marketing-copy h2 {
          max-width: 15ch;
        }

        .growth-offer {
          max-width: 680px;
        }

        .marketing-plan,
        .marketing-plan.featured {
          grid-column: auto;
          min-height: 0;
        }

        .control-copy {
          max-width: 700px;
        }

        .plan {
          grid-template-columns: 1fr 1fr;
        }
      }

      @media (max-width: 720px) {
        .growth-marketing-actions {
          align-items: stretch;
          flex-direction: column;
        }

        .growth-marketing-actions .button,
        .growth-marketing-actions .text-action {
          justify-content: center;
          width: 100%;
        }

        .growth-marketing-assurance {
          grid-template-columns: 1fr;
        }

        .growth-marketing-assurance span + span {
          border-top: 1px solid var(--line);
          border-left: 0;
        }

        .shell {
          width: min(calc(100% - 32px), var(--page-width));
        }

        .nav {
          min-height: 64px;
        }

        .nav-actions {
          gap: 6px;
        }

        .session-link {
          min-height: 44px;
          max-width: 72px;
          padding-inline: 6px;
          font-size: 13px;
        }

        .session-label-full {
          display: none;
        }

        .session-label-short {
          display: inline;
        }

        .nav-actions .button {
          min-height: 44px;
          padding-inline: 12px;
          font-size: 13px;
        }

        .hero {
          min-height: auto;
          gap: 40px;
          padding-block: 48px 64px;
        }

        .hero h1 {
          font-size: clamp(43px, 13vw, 59px);
        }

        .hero-visual {
          min-height: 540px;
        }

        .hero-photo {
          inset: 0 0 0 8%;
        }

        .chat-preview {
          bottom: 20px;
          width: min(352px, 92%);
        }

        .confidence-grid {
          grid-template-columns: 1fr 1fr;
        }

        .confidence-item:nth-child(odd) {
          padding-left: 0;
          border-left: 0;
        }

        .confidence-item:nth-child(even) {
          padding-left: 20px;
          border-left: 1px solid var(--line);
        }

        .confidence-item:nth-child(n + 3) {
          border-top: 1px solid var(--line);
        }

        .confidence-item {
          min-height: 118px;
          padding-block: 24px;
          padding-right: 18px;
        }

        section.block {
          padding-block: 88px;
        }

        .how-image {
          min-height: 360px;
        }

        .memory-grid {
          grid-template-columns: 1fr;
          grid-template-rows: auto;
        }

        .memory-cell.primary {
          grid-row: auto;
          min-height: 530px;
        }

        .account-preview {
          box-shadow: none;
        }

        .account-row {
          grid-template-columns: 1fr;
          gap: 8px;
          padding-block: 18px;
        }

        .account-value {
          text-align: left;
        }

        .pricing-heading {
          gap: 18px;
          margin-bottom: 30px;
        }

        .pricing-meters {
          grid-template-columns: 1fr;
          margin-bottom: 30px;
        }

        .pricing-meters > div {
          grid-template-columns: auto 1fr;
          padding: 18px 0;
        }

        .pricing-meters > div + div {
          border-top: 1px solid var(--line);
          border-left: 0;
          padding-left: 0;
        }

        .pricing-meters p {
          grid-column: 2;
        }

        .plan {
          grid-template-columns: 1fr;
        }

        .topup strong {
          margin-top: 46px;
        }

        .final-cta {
          padding: 48px 28px;
        }

        footer {
          grid-template-columns: 1fr;
          align-items: start;
        }
      }

      @media (max-width: 460px) {
        .hero-visual {
          min-height: 500px;
        }

        .chat-preview {
          width: 96%;
        }

        .chat-messages {
          max-height: 270px;
        }

        .hero-actions .button {
          width: 100%;
        }

        .confidence-grid {
          grid-template-columns: 1fr;
        }

        .confidence-item,
        .confidence-item:nth-child(even) {
          padding-left: 0;
          border-left: 0;
          border-top: 1px solid var(--line);
        }

        .confidence-item:first-child {
          border-top: 0;
        }

        .memory-context div {
          grid-template-columns: 1fr;
          gap: 5px;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        html {
          scroll-behavior: auto;
        }

        *,
        *::before,
        *::after {
          animation-duration: 0.01ms !important;
          animation-iteration-count: 1 !important;
          transition-duration: 0.01ms !important;
        }

        .reveal {
          opacity: 1;
          transform: none;
        }
      }

      @media (prefers-reduced-transparency: reduce) {
        .site-header,
        .chat-preview {
          background: var(--surface-raised);
          backdrop-filter: none;
        }
      }
        .marketing-cycle-head { padding: 22px 20px 18px; }
        .marketing-cycle-options { padding: 20px 20px 0; }
        .marketing-cycle-option {
          grid-template-columns: minmax(0, 1fr) auto;
        }
        .marketing-cycle-option > span {
          grid-column: 1 / -1;
          text-align: left;
        }
        .marketing-cycle-note { margin-inline: 20px; }
        .marketing-cycle-cta {
          width: calc(100% - 40px);
          margin: 18px 20px 22px;
        }