:root {
    --ink: #071c3d;
    --text: #526579;
    --muted: #718297;
    --line: #cbd6e2;
    --line-soft: #e3e9ef;
    --paper: #ffffff;
    --canvas: #f8fafc;
    --blue: #1e63f3;
    --blue-deep: #1248bd;
    --cyan: #20b7c7;
    --success: #25a879;
    --shadow: 0 24px 70px rgb(7 28 61 / 10%);
    --font-sans: "Alibaba PuHuiTi 3.0", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--canvas);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
body:has(dialog[open]) { overflow: hidden; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img { display: block; max-width: 100%; }
button { color: inherit; }
h1, h2, h3, p, figure { margin-top: 0; }

.site-shell { width: min(1280px, calc(100% - 64px)); margin-inline: auto; }
.section-pad { padding-block: clamp(88px, 9vw, 132px); }
.skip-link {
    position: fixed; left: 16px; top: -80px; z-index: 1000;
    padding: 10px 16px; color: #fff; background: var(--ink); border-radius: 6px;
}
.skip-link:focus { top: 16px; }
.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.site-header {
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid transparent;
    background: rgb(248 250 252 / 86%);
    backdrop-filter: blur(18px) saturate(1.2);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line-soft); box-shadow: 0 10px 30px rgb(7 28 61 / 5%); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; min-width: max-content; }
.brand-mark { width: 38px; height: 38px; display: block; flex: 0 0 38px; object-fit: contain; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { font-size: 17px; letter-spacing: .04em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 9px; letter-spacing: .04em; }
.desktop-nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 34px); margin-left: auto; }
.desktop-nav a, .text-action { color: #3e5268; font-size: 14px; font-weight: 600; text-decoration: none; }
.desktop-nav a { position: relative; padding-block: 26px; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 18px; height: 2px; background: var(--blue); transition: right .2s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.text-action { border: 0; background: transparent; cursor: pointer; padding: 10px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 6px; background: #fff; padding: 11px; cursor: pointer; }
.menu-toggle span:not(.sr-only) { display: block; height: 2px; margin: 4px 0; background: var(--ink); }
.mobile-menu { border-top: 1px solid var(--line-soft); background: #fff; }
.mobile-menu nav { width: min(100% - 40px, 720px); margin: auto; padding: 14px 0 22px; display: grid; }
.mobile-menu a, .mobile-menu button { padding: 13px 0; text-align: left; text-decoration: none; font-weight: 650; border: 0; border-bottom: 1px solid var(--line-soft); background: transparent; }

.button {
    min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 12px;
    padding: 0 22px; border: 1px solid transparent; border-radius: 7px;
    font-weight: 700; text-decoration: none; cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button:focus-visible, button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
    outline: 3px solid rgb(30 99 243 / 28%); outline-offset: 3px;
}
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 30px rgb(30 99 243 / 24%); }
.button-primary:hover { background: var(--blue-deep); box-shadow: 0 16px 36px rgb(30 99 243 / 30%); }
.button-secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.button-secondary:hover { border-color: #8fa4bb; box-shadow: 0 12px 30px rgb(7 28 61 / 8%); }
.button.compact { min-height: 42px; padding-inline: 16px; font-size: 13px; }

.eyebrow {
    margin-bottom: 18px; color: var(--blue); font-family: var(--font-mono); font-size: 11px;
    font-weight: 700; letter-spacing: .15em; text-transform: uppercase;
}
.hero { position: relative; overflow: hidden; padding-top: clamp(72px, 7vw, 108px); background: #fbfcfe; }
.hero::before {
    content: ""; position: absolute; width: 760px; height: 760px; right: -320px; top: -380px;
    border: 1px solid rgb(30 99 243 / 12%); border-radius: 50%; box-shadow: 0 0 0 110px rgb(30 99 243 / 2%), 0 0 0 230px rgb(32 183 199 / 2%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, .9fr) minmax(560px, 1.1fr); align-items: center; gap: clamp(46px, 6vw, 94px); }
.hero-copy { padding-block: 20px; }
.hero h1 {
    max-width: 720px; margin-bottom: 28px; font-size: clamp(46px, 4vw, 60px); line-height: 1.1;
    letter-spacing: -.045em; white-space: normal;
}
.hero-lede { max-width: 650px; margin-bottom: 34px; color: var(--text); font-size: 18px; line-height: 1.78; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin: 24px 0 0; color: var(--muted); font-size: 13px; letter-spacing: .015em; }
.hero-visual {
    position: relative; margin: 0; overflow: hidden; border: 1px solid #c7d3df; border-radius: 10px;
    background: #fff; box-shadow: var(--shadow); isolation: isolate;
}
.hero-visual::before { content: ""; position: absolute; inset: 0; z-index: 1; box-shadow: inset 0 0 0 1px rgb(255 255 255 / 55%); pointer-events: none; }
.hero-visual img { width: 100%; height: auto; aspect-ratio: 1.6; object-fit: cover; }
.hero-visual figcaption {
    position: absolute; z-index: 2; left: 18px; right: 18px; bottom: 18px;
    display: flex; justify-content: space-between; gap: 16px; padding: 12px 14px;
    color: #fff; background: rgb(7 28 61 / 82%); border: 1px solid rgb(255 255 255 / 20%); border-radius: 5px;
    backdrop-filter: blur(12px); font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em;
}
.hero-visual figcaption span { display: flex; align-items: center; gap: 8px; }
.signal { width: 7px; height: 7px; background: #59d3a3; border-radius: 50%; box-shadow: 0 0 0 5px rgb(89 211 163 / 15%); }
.capability-rail {
    position: relative; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 58px;
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.capability-rail span { padding: 19px 22px; color: #41566b; font-size: 13px; font-weight: 650; border-right: 1px solid var(--line-soft); }
.capability-rail span:last-child { border-right: 0; }
.capability-rail b { margin-right: 14px; color: var(--blue); font-family: var(--font-mono); font-size: 10px; }

.section-heading { max-width: 780px; margin-bottom: 56px; }
.section-heading h2, .service-layout h2, .final-cta h2 {
    margin-bottom: 20px; font-size: clamp(38px, 4.1vw, 58px); line-height: 1.13; letter-spacing: -.045em;
}
.section-heading > p:last-child { color: var(--text); font-size: 17px; }
.split-heading { max-width: none; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(340px, .75fr); gap: 70px; align-items: end; }
.split-heading > p { margin-bottom: 8px; }
.product-section { background: #fff; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability-item { min-height: 310px; padding: 28px 28px 26px; border-right: 1px solid var(--line); }
.capability-item:last-child { border-right: 0; }
.capability-index { min-height: 38px; display: flex; align-items: center; justify-content: space-between; padding-bottom: 12px; border-bottom: 1px solid var(--line-soft); }
.capability-index code { color: var(--muted); font-family: var(--font-mono); font-size: 9px; letter-spacing: .08em; }
.capability-glyph { position: relative; width: 18px; height: 18px; border: 1px solid var(--blue); transform: rotate(45deg); }
.capability-glyph::after { content: ""; position: absolute; inset: 4px; border: 1px solid var(--blue); }
.capability-item h3 { margin: 30px 0 14px; font-size: 22px; letter-spacing: -.02em; }
.capability-item p { min-height: 84px; color: var(--text); font-size: 14px; }
.capability-item button { padding: 0 0 5px; color: var(--blue); background: transparent; border: 0; border-bottom: 1px solid var(--blue); font-size: 13px; font-weight: 700; cursor: pointer; }

.browser-agent { background: #f5f7fa; }
.agent-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(460px, .82fr); align-items: stretch; gap: clamp(58px, 7vw, 104px); }
.agent-copy h2 { margin-bottom: 22px; font-size: clamp(40px, 4.4vw, 60px); line-height: 1.12; letter-spacing: -.045em; }
.agent-copy > p:not(.eyebrow):not(.authorization-note) { max-width: 680px; color: var(--text); font-size: 16px; }
.channel-index { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 34px 0 36px; }
.channel-index span { display: flex; align-items: center; gap: 9px; min-height: 40px; border-bottom: 1px solid #bfcbd8; font-size: 13px; font-weight: 650; }
.channel-index i { width: 6px; height: 6px; border-radius: 50%; }
.channel-red { background: #ff5263; }.channel-cyan { background: #16b8c4; }.channel-ink { background: var(--ink); }.channel-blue { background: var(--blue); }
.protocol-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.protocol-list li { min-height: 90px; display: grid; grid-template-columns: 50px 1fr; gap: 20px; align-items: center; border-bottom: 1px solid var(--line); }
.protocol-list li > b { width: 42px; padding-block: 10px; color: var(--blue); border-bottom: 2px solid var(--blue); font-family: var(--font-mono); font-size: 10px; text-align: center; }
.protocol-list h3 { margin: 0 0 3px; font-size: 17px; }
.protocol-list p { margin: 0; color: var(--text); font-size: 13px; }
.authorization-note { margin: 34px 0 0; padding: 17px 18px; border-left: 3px solid var(--blue); color: var(--text); font-size: 13px; background: #fff; }
.authorization-note strong { color: var(--ink); }
.agent-visual { position: relative; min-height: 800px; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; box-shadow: var(--shadow); }
.agent-visual img { width: 100%; height: 100%; object-fit: cover; }
.agent-visual figcaption { position: absolute; inset: 18px 18px auto; display: flex; justify-content: space-between; gap: 12px; }
.agent-visual figcaption span { padding: 10px 12px; color: var(--ink); background: rgb(255 255 255 / 88%); border: 1px solid var(--line); border-radius: 5px; backdrop-filter: blur(12px); font-size: 11px; font-weight: 650; }

.scenario-section { background: #fff; }
.scenario-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; }
.scenario-item { position: relative; min-height: 440px; margin: 0; overflow: hidden; background: #e9eef3; }
.scenario-item:nth-child(3), .scenario-item:nth-child(4) { min-height: 390px; }
.scenario-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.8,.2,1); }
.scenario-item:hover img { transform: scale(1.025); }
.scenario-copy { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 20px; color: #fff; background: rgb(7 28 61 / 84%); border: 1px solid rgb(255 255 255 / 18%); border-radius: 6px; backdrop-filter: blur(14px); }
.scenario-copy code { color: #72dcff; font-family: var(--font-mono); font-size: 10px; }
.scenario-copy h3 { margin: 8px 0 6px; font-size: 22px; }
.scenario-copy p { margin: 0; color: #dce8f2; font-size: 13px; }

.security-section { background: #f8fafc; }
.security-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 38px; align-items: stretch; }
.security-layout figure { position: relative; margin: 0; overflow: hidden; border: 1px solid var(--line); background: #fff; }
.security-layout figure img { width: 100%; height: 100%; object-fit: cover; }
.security-layout figure figcaption { position: absolute; left: 18px; bottom: 18px; padding: 8px 10px; color: var(--ink); background: rgb(255 255 255 / 90%); font-family: var(--font-mono); font-size: 9px; letter-spacing: .08em; }
.governance-ledger { border: 1px solid var(--line); background: #fff; box-shadow: 0 18px 50px rgb(7 28 61 / 6%); }
.governance-ledger > article { min-height: 140px; display: grid; grid-template-columns: 64px 1fr 32px; gap: 20px; align-items: center; padding: 0 24px; border-bottom: 1px solid var(--line-soft); }
.governance-ledger article code { height: 58px; display: grid; place-items: center; color: var(--blue); border-right: 1px solid var(--line-soft); font-family: var(--font-mono); font-size: 10px; }
.governance-ledger article h3 { margin: 0 0 6px; font-size: 20px; }
.governance-ledger article p { margin: 0; color: var(--text); font-size: 13px; }
.governance-ledger article > span { color: var(--blue); font-size: 25px; }
.delivery-protocol { padding: 24px; background: #f7f9fb; }
.delivery-protocol h3 { margin-bottom: 20px; font-size: 18px; }
.delivery-protocol ol { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 0; padding: 0; }
.delivery-protocol li { display: flex; gap: 10px; align-items: center; padding-top: 12px; border-top: 1px solid var(--line); font-size: 12px; font-weight: 650; }
.delivery-protocol b { color: var(--blue); font-family: var(--font-mono); font-size: 10px; }

.service-section { color: #fff; background: var(--blue); }
.service-section .eyebrow { color: #b8eaff; }
.service-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 90px; align-items: end; }
.service-layout h2 { margin-bottom: 0; }
.service-copy p { color: #dbe8ff; font-size: 17px; }
.service-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button-light { color: var(--blue); background: #fff; }
.button-outline-light { color: #fff; background: transparent; border-color: rgb(255 255 255 / 65%); }

.faq-section { background: #fff; }
.faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 80px; display: flex; justify-content: space-between; align-items: center; gap: 20px; cursor: pointer; font-size: 17px; font-weight: 700; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--blue); font-size: 22px; transition: transform .2s ease; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { max-width: 720px; margin: -3px 52px 26px 0; color: var(--text); }

.final-cta { padding-block: 48px 88px; background: #fff; }
.final-cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: end; padding: clamp(36px, 5vw, 68px); color: #fff; background: var(--ink); border-top: 3px solid #45cbdf; }
.final-cta .eyebrow { color: #72dcff; }
.final-cta h2 { max-width: 800px; font-size: clamp(36px, 3.8vw, 54px); }
.final-cta p:not(.eyebrow) { margin: 0; color: #d4dfeb; }
.final-cta-inner > div:last-child { display: flex; gap: 10px; }

.site-footer { padding: 62px 0 24px; background: #eff3f7; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 60px; padding-bottom: 48px; }
.footer-grid h2 { margin-bottom: 15px; font-size: 13px; }
.footer-grid p { color: var(--text); font-size: 13px; }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; }
.footer-grid a, .footer-grid button { padding: 0; color: var(--text); text-decoration: none; background: transparent; border: 0; font-size: 13px; cursor: pointer; }
.footer-grid a:hover, .footer-grid button:hover { color: var(--blue); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }

.lead-dialog { width: min(980px, calc(100% - 32px)); max-height: min(780px, calc(100vh - 32px)); padding: 0; overflow: auto; border: 0; border-radius: 10px; box-shadow: 0 40px 100px rgb(7 28 61 / 32%); }
.lead-dialog::backdrop { background: rgb(7 28 61 / 55%); backdrop-filter: blur(5px); }
.dialog-layout { display: grid; grid-template-columns: 320px 1fr; min-height: 650px; }
.dialog-layout aside { padding: 42px 34px; color: #fff; background: var(--ink); }
.dialog-layout aside .eyebrow { color: #72dcff; }
.dialog-layout aside h2 { margin-bottom: 18px; font-size: 36px; line-height: 1.2; }
.dialog-layout aside > p:not(.eyebrow) { color: #c9d6e2; font-size: 14px; }
.dialog-layout aside ol { list-style: none; margin: 44px 0 0; padding: 0; }
.dialog-layout aside li { display: flex; align-items: center; gap: 13px; min-height: 54px; border-top: 1px solid rgb(255 255 255 / 16%); font-size: 13px; }
.dialog-layout aside b { color: #72dcff; font-family: var(--font-mono); font-size: 10px; }
.dialog-form-wrap { position: relative; padding: 44px 42px; background: #fff; }
.dialog-close { position: absolute; top: 14px; right: 16px; width: 38px; height: 38px; border: 0; background: transparent; font-size: 27px; cursor: pointer; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid label { display: grid; gap: 7px; min-width: 0; }
.form-grid label > span { font-size: 12px; font-weight: 700; }
.form-grid input, .form-grid select, .form-grid textarea { width: 100%; min-height: 46px; padding: 10px 12px; color: var(--ink); background: #fff; border: 1px solid #b9c6d3; border-radius: 5px; }
.form-grid textarea { resize: vertical; }
.form-grid input[aria-invalid="true"], .form-grid textarea[aria-invalid="true"] { border-color: #d74242; }
.full-field { grid-column: 1 / -1; }
.honeypot { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-privacy { margin: 18px 0 12px; color: var(--muted); font-size: 11px; }
.form-feedback { min-height: 26px; color: #b42318; font-size: 13px; }
.submit-button { width: 100%; }
.success-state { min-height: 540px; place-content: center; text-align: center; }
.success-state:not([hidden]) { display: grid; justify-items: center; }
.success-state > span { width: 64px; height: 64px; display: grid; place-items: center; color: #fff; background: var(--success); border-radius: 50%; font-size: 30px; }
.success-state h3 { margin: 20px 0 4px; font-size: 28px; }
.success-state code { color: var(--blue); }

.legal-page, .workspace-page { min-height: 100vh; }
.legal-main { max-width: 880px; padding-block: 104px 130px; }
.legal-main h1 { margin-bottom: 20px; font-size: clamp(48px, 6vw, 72px); letter-spacing: -.05em; }
.legal-intro { margin-bottom: 60px; color: var(--text); font-size: 18px; }
.legal-main section { padding-block: 30px; border-top: 1px solid var(--line); }
.legal-main section h2 { font-size: 22px; }
.legal-main section p { color: var(--text); }
.legal-main a { color: var(--blue); }
.legal-updated { margin-top: 40px; color: var(--muted); font-size: 12px; }
.legal-footer { padding-top: 24px; }
.workspace-gate { width: min(1360px, calc(100% - 64px)); min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; gap: 34px; margin: auto; padding-block: 34px; }
.workspace-brand { align-self: start; }
.workspace-gate-panel { display: grid; grid-template-columns: .93fr 1.07fr; align-items: stretch; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.workspace-gate-copy { align-self: center; padding: clamp(38px, 6vw, 78px); }
.workspace-gate-copy h1 { margin-bottom: 24px; font-size: clamp(42px, 3.8vw, 56px); line-height: 1.12; letter-spacing: -.045em; }
.workspace-gate-copy > p:not(.eyebrow) { color: var(--text); font-size: 16px; }
.workspace-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 40px; }
.auth-boundary { display: grid; grid-template-columns: 30px 1fr; gap: 14px; padding: 18px 0 0 16px; border-top: 1px solid var(--line); border-left: 3px solid var(--blue); }
.auth-boundary > span { color: var(--blue); font-size: 22px; }
.auth-boundary p { margin: 3px 0 0; color: var(--text); font-size: 12px; }
.workspace-gate-visual { position: relative; min-height: 640px; margin: 0; overflow: hidden; }
.workspace-gate-visual img { width: 100%; height: 100%; object-fit: cover; }
.workspace-gate-visual figcaption { position: absolute; right: 16px; bottom: 16px; padding: 8px 10px; color: var(--ink); background: rgb(255 255 255 / 90%); font-family: var(--font-mono); font-size: 9px; }
.workspace-help { align-self: end; margin: 0; color: var(--muted); font-size: 12px; text-align: center; }
.workspace-help a { color: var(--blue); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1120px) {
    .desktop-nav, .text-action, .desktop-cta { display: none; }
    .menu-toggle { display: block; }
    .hero-grid { grid-template-columns: 1fr; }
    .hero-copy { max-width: 900px; }
    .hero-visual { width: 100%; }
    .capability-grid { grid-template-columns: repeat(2, 1fr); }
    .capability-item:nth-child(2) { border-right: 0; }
    .capability-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .agent-layout { grid-template-columns: 1fr 420px; gap: 46px; }
    .scenario-grid { grid-template-columns: 1fr 1fr; }
    .service-layout { gap: 50px; }
    .final-cta-inner { grid-template-columns: 1fr; align-items: start; }
}

@media (max-width: 820px) {
    .site-shell { width: min(100% - 40px, 680px); }
    .section-pad { padding-block: 80px; }
    .split-heading, .agent-layout, .security-layout, .service-layout, .faq-layout, .workspace-gate-panel { grid-template-columns: 1fr; }
    .split-heading { gap: 16px; }
    .capability-rail { grid-template-columns: repeat(2, 1fr); }
    .capability-rail span:nth-child(2) { border-right: 0; }
    .capability-rail span:nth-child(-n+2) { border-bottom: 1px solid var(--line-soft); }
    .agent-visual { min-height: 620px; }
    .scenario-grid { grid-template-columns: 1fr; }
    .scenario-item, .scenario-item:nth-child(3), .scenario-item:nth-child(4) { min-height: 420px; }
    .security-layout figure { min-height: 460px; }
    .service-copy { max-width: 640px; }
    .faq-layout { gap: 20px; }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2; }
    .dialog-layout { grid-template-columns: 1fr; }
    .dialog-layout aside { padding: 30px; }
    .dialog-layout aside ol { display: none; }
    .dialog-form-wrap { padding: 42px 28px 30px; }
    .workspace-gate { width: min(100% - 40px, 680px); }
    .workspace-gate-visual { min-height: 440px; order: -1; }
}

@media (max-width: 580px) {
    html { scroll-padding-top: 76px; }
    .site-shell { width: calc(100% - 32px); }
    .header-inner { min-height: 68px; }
    .header-actions > .button { display: none; }
    .section-pad { padding-block: 68px; }
    .hero { padding-top: 54px; }
    .hero h1 { font-size: 42px; letter-spacing: -.045em; }
    .hero-lede { font-size: 16px; }
    .hero-actions { display: grid; }
    .hero-actions .button { width: 100%; }
    .hero-note { font-size: 11px; }
    .hero-visual figcaption { left: 10px; right: 10px; bottom: 10px; font-size: 8px; }
    .hero-visual figcaption span:last-child { display: none; }
    .capability-rail { margin-top: 36px; }
    .capability-rail span { padding: 14px 10px; font-size: 11px; }
    .capability-rail b { margin-right: 7px; }
    .section-heading { margin-bottom: 38px; }
    .section-heading h2, .service-layout h2, .final-cta h2, .agent-copy h2 { font-size: 36px; }
    .capability-grid { grid-template-columns: 1fr; }
    .capability-item { min-height: auto; padding: 24px 20px 28px; border-right: 0; border-bottom: 1px solid var(--line); }
    .capability-item:last-child { border-bottom: 0; }
    .capability-item p { min-height: auto; }
    .channel-index { grid-template-columns: repeat(2, 1fr); gap: 8px 18px; }
    .protocol-list li { grid-template-columns: 42px 1fr; gap: 14px; padding-block: 10px; }
    .protocol-list p { font-size: 12px; }
    .agent-visual { min-height: 560px; }
    .agent-visual figcaption { inset: 10px 10px auto; }
    .agent-visual figcaption span { padding: 7px 8px; font-size: 9px; }
    .scenario-item, .scenario-item:nth-child(3), .scenario-item:nth-child(4) { min-height: 360px; }
    .scenario-copy { left: 10px; right: 10px; bottom: 10px; padding: 16px; }
    .scenario-copy h3 { font-size: 19px; }
    .security-layout figure { min-height: 340px; }
    .governance-ledger > article { min-height: 132px; grid-template-columns: 42px 1fr 20px; gap: 13px; padding: 0 14px; }
    .governance-ledger article code { height: 48px; }
    .governance-ledger article h3 { font-size: 17px; }
    .governance-ledger article p { font-size: 12px; }
    .delivery-protocol { padding: 20px 14px; }
    .delivery-protocol ol { grid-template-columns: 1fr; gap: 10px; }
    .service-actions, .final-cta-inner > div:last-child { display: grid; }
    .final-cta { padding-bottom: 56px; }
    .final-cta-inner { width: calc(100% - 24px); padding: 34px 22px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 20px; }
    .footer-grid > div:first-child { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; }
    .form-grid { grid-template-columns: 1fr; }
    .full-field { grid-column: auto; }
    .lead-dialog { width: calc(100% - 16px); max-height: calc(100vh - 16px); }
    .dialog-layout aside h2 { font-size: 30px; }
    .workspace-gate { width: calc(100% - 24px); padding-block: 22px; }
    .workspace-gate-copy { padding: 32px 22px; }
    .workspace-gate-copy h1 { font-size: 38px; }
    .workspace-actions { display: grid; }
    .workspace-gate-visual { min-height: 300px; }
    .legal-main { padding-block: 70px 90px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
}

/* Workspace path chooser (personal vs enterprise), additive. */
.workspace-paths { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 32px 0 40px; }
.workspace-path { display: flex; align-items: center; gap: 20px; padding: 20px 24px; border: 1px solid rgba(255, 255, 255, .1); border-radius: 16px; background: rgba(255, 255, 255, .04); }
.workspace-path-text { flex: 1; min-width: 0; }
.workspace-path-text h2 { font-size: 18px; margin: 0 0 4px; }
.workspace-path-text p { margin: 0; font-size: 13px; line-height: 1.6; opacity: .78; }
.workspace-path .button { flex-shrink: 0; white-space: nowrap; }
@media (max-width: 560px) {
    .workspace-path { flex-direction: column; align-items: stretch; text-align: center; gap: 14px; }
    .workspace-path .button { justify-content: center; }
}

/* ---- /portal 个人工作台（追加，勿改动上方既有样式） ---- */
.portal-page { min-height: 100vh; background: #f4f7fb; }
.portal { max-width: 1080px; margin: 0 auto; padding: 28px 20px 64px; }
.portal-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
.portal-user { display: flex; align-items: center; gap: 14px; font-size: 14px; }
.portal-username { font-weight: 700; }
.portal-empty { display: grid; place-items: center; min-height: 46vh; }
.portal-empty-card { max-width: 560px; padding: 44px 40px; background: #fff; border: 1px solid #dbe4ee; border-radius: 12px; text-align: center; }
.portal-empty-card h1 { margin: 8px 0 14px; font-size: 28px; }
.portal-empty-card .workspace-actions { justify-content: center; margin-top: 22px; }
.desktop-single { display: grid; place-items: center; }
.desktop-single .desktop-card { width: 100%; max-width: 640px; padding: 40px 38px; }
.desktop-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.desktop-card { padding: 26px 24px; background: #fff; border: 1px solid #dbe4ee; border-radius: 12px; }
.desktop-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.desktop-label-form { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }
.desktop-label-form input { flex: 1; min-width: 0; min-height: 38px; padding: 6px 10px; border: 1px solid #b9c6d3; border-radius: 5px; font-size: 14px; }
.desktop-label-feedback { font-size: 12px; color: var(--success, #0f9f6e); white-space: nowrap; }
.desktop-label-feedback.is-error { color: #b42318; }
.health-badge { flex-shrink: 0; padding: 4px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; text-transform: uppercase; background: #e8edf3; color: #51606f; }
.health-badge.health-online { background: #dcf5e9; color: #0f7a4d; }
.health-badge.health-offline { background: #fde8e8; color: #b42318; }
.health-badge.health-orphaned { background: #fdf1dc; color: #9a6212; }
.desktop-meta { display: grid; gap: 8px; margin: 0 0 18px; font-size: 13px; }
.desktop-meta div { display: flex; justify-content: space-between; gap: 12px; }
.desktop-meta dt { color: var(--muted, #64748b); }
.desktop-meta dd { margin: 0; font-family: var(--font-mono, monospace); word-break: break-all; text-align: right; }
.desktop-credentials { margin-top: 16px; padding: 14px; background: #0f172a; color: #d7e3f4; border-radius: 8px; font-size: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
@media (max-width: 560px) {
    .portal-header { flex-direction: column; align-items: flex-start; }
    .desktop-single .desktop-card, .portal-empty-card { padding: 30px 22px; }
}