/* 财小云财税 AI 统领页 V5：满幅流体 MCP 核心与极光知识时间线。 */
.ai-hero { position: relative; overflow: hidden; min-height: 760px; padding: 124px 0 102px; color: var(--cxy-isle-ink); background: var(--cxy-isle-bg); }
.ai-grid { position: absolute; inset: 0; opacity: .18; pointer-events: none; background-image: linear-gradient(var(--cxy-isle-border) 1px, transparent 1px), linear-gradient(90deg, var(--cxy-isle-border) 1px, transparent 1px); background-size: 62px 62px; mask-image: linear-gradient(to bottom, black 0, black 66%, transparent 100%); }
.ai-glow { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 72% 29%, color-mix(in srgb, var(--cxy-cyan) 18%, transparent), transparent 30%), radial-gradient(circle at 22% 80%, color-mix(in srgb, var(--cxy-blue) 14%, transparent), transparent 34%); }
.ai-hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--cxy-gradient-aurora); }
.ai-hero-in { position: relative; display: grid; grid-template-columns: 1.06fr .94fr; gap: var(--cxy-space-10); align-items: center; }
.ai-kicker { display: inline-flex; align-items: center; gap: var(--cxy-space-3); color: var(--cxy-isle-tint-cyan-fg); font: 600 11px/1 var(--cxy-font-num); letter-spacing: .22em; }
.ai-kicker i { width: 7px; height: 7px; border-radius: 50%; background: var(--cxy-positive); box-shadow: 0 0 0 6px color-mix(in srgb, var(--cxy-positive) 12%, transparent); }
.ai-copy h1 { margin: var(--cxy-space-7) 0 var(--cxy-space-6); color: var(--cxy-isle-ink); font-family: var(--cxy-font-cn); font-size: clamp(46px, 4.65vw, 64px); line-height: 1.08; letter-spacing: -.05em; }
.ai-copy h1 span { display: inline-block; white-space: nowrap; background: linear-gradient(110deg, var(--cxy-isle-ink) 4%, var(--cxy-isle-tint-blue-fg) 46%, var(--cxy-isle-tint-cyan-fg) 88%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ai-copy > p { max-width: 620px; color: var(--cxy-isle-text); font-size: 17px; line-height: 1.75; }
.ai-actions { display: flex; gap: var(--cxy-space-4); margin-top: var(--cxy-space-8); }
.ai-button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 var(--cxy-space-6); border-radius: var(--cxy-radius-md); font-size: var(--cxy-size-sm); font-weight: var(--cxy-weight-semibold); transition: transform var(--cxy-duration-fast) var(--cxy-ease-out), box-shadow var(--cxy-duration-fast) var(--cxy-ease-out), border-color var(--cxy-duration-fast) var(--cxy-ease-standard); }
.ai-button:hover { transform: translateY(-2px); }
.ai-button-primary { color: var(--cxy-on-color); background: var(--cxy-gradient-aurora); box-shadow: 0 12px 36px -12px color-mix(in srgb, var(--cxy-cyan) 60%, transparent); }
.ai-button-ghost { color: var(--cxy-isle-ink-2); border: 1px solid var(--cxy-isle-border-strong); background: color-mix(in srgb, var(--cxy-isle-surface-card) 72%, transparent); }
.ai-state-line { display: flex; flex-wrap: wrap; gap: var(--cxy-space-5); margin-top: var(--cxy-space-9); color: var(--cxy-isle-muted); font-size: 11px; }
.ai-state-line span { display: inline-flex; align-items: center; gap: 7px; }
.ai-state-line b { width: 5px; height: 5px; border-radius: 50%; background: var(--cxy-isle-border-strong); }
.ai-state-line b.is-live { background: var(--cxy-positive); }

.ai-signal { position: relative; width: min(540px, 100%); aspect-ratio: 1; margin-left: auto; isolation: isolate; }
.signal-aurora { position: absolute; inset: 12%; z-index: -1; border-radius: 46% 54% 50% 50%; background: conic-gradient(from 220deg, color-mix(in srgb, var(--cxy-blue) 30%, transparent), color-mix(in srgb, var(--cxy-cyan) 28%, transparent), color-mix(in srgb, var(--cxy-positive) 16%, transparent), color-mix(in srgb, var(--cxy-blue) 30%, transparent)); filter: blur(46px); opacity: .78; }
.signal-halo { position: absolute; border-radius: 50%; background: conic-gradient(from 20deg, transparent 0 10%, color-mix(in srgb, var(--cxy-cyan) 72%, transparent) 16% 21%, transparent 28% 54%, color-mix(in srgb, var(--cxy-action) 62%, transparent) 61% 67%, transparent 76% 100%); -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px)); mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px)); filter: drop-shadow(0 0 10px color-mix(in srgb, var(--cxy-cyan) 30%, transparent)); }
.signal-halo::before { content: ""; position: absolute; inset: 0; border: 1px solid color-mix(in srgb, var(--cxy-isle-border-strong) 62%, transparent); border-radius: 50%; }
.signal-halo > i { position: absolute; left: 50%; top: -4px; width: 9px; height: 9px; border-radius: 50%; background: var(--cxy-cyan); box-shadow: 0 0 0 7px color-mix(in srgb, var(--cxy-cyan) 10%, transparent), 0 0 24px var(--cxy-cyan); }
.halo-one { inset: 2%; }
.halo-two { inset: 15%; background: conic-gradient(from 170deg, transparent 0 22%, color-mix(in srgb, var(--cxy-action) 70%, transparent) 29% 35%, transparent 42% 73%, color-mix(in srgb, var(--cxy-positive) 52%, transparent) 80% 85%, transparent 91%); }
.halo-two > i { background: var(--cxy-action); box-shadow: 0 0 0 7px color-mix(in srgb, var(--cxy-action) 10%, transparent), 0 0 24px var(--cxy-action); }
.halo-three { inset: 28%; background: conic-gradient(from 92deg, transparent 0 24%, color-mix(in srgb, var(--cxy-cyan) 66%, transparent) 34% 48%, transparent 58% 100%); }
.halo-three > i { width: 7px; height: 7px; background: var(--cxy-positive); box-shadow: 0 0 0 6px color-mix(in srgb, var(--cxy-positive) 10%, transparent), 0 0 20px var(--cxy-positive); }
.signal-core { position: absolute; left: 50%; top: 50%; z-index: 3; display: flex; width: 218px; height: 218px; align-items: center; justify-content: center; flex-direction: column; text-align: center; transform: translate(-50%, -50%); border: 1px solid color-mix(in srgb, var(--cxy-cyan) 30%, var(--cxy-isle-border)); border-radius: 50%; background: radial-gradient(circle at 38% 24%, color-mix(in srgb, var(--cxy-cyan) 10%, transparent), transparent 46%), color-mix(in srgb, var(--cxy-isle-surface-card) 88%, transparent); box-shadow: inset 0 0 62px color-mix(in srgb, var(--cxy-blue) 13%, transparent), 0 0 96px color-mix(in srgb, var(--cxy-cyan) 11%, transparent); backdrop-filter: blur(18px); }
.signal-core::before { content: ""; position: absolute; inset: 12px; border: 1px solid color-mix(in srgb, var(--cxy-cyan) 13%, transparent); border-radius: 50%; }
.signal-core span { position: relative; color: var(--cxy-isle-tint-cyan-fg); font: 600 9px/1 var(--cxy-font-num); letter-spacing: .22em; }
.signal-core strong { position: relative; margin: var(--cxy-space-3) 0; color: var(--cxy-isle-ink); font-size: 21px; line-height: 1.28; letter-spacing: -.02em; }
.signal-core small { position: relative; display: inline-flex; align-items: center; gap: 7px; color: var(--cxy-positive); font: 600 9px/1 var(--cxy-font-num); letter-spacing: .18em; }
.signal-core small i { width: 5px; height: 5px; border-radius: 50%; background: var(--cxy-positive); box-shadow: 0 0 12px var(--cxy-positive); }
.signal-orbit { position: absolute; z-index: 4; display: flex; align-items: center; gap: 8px; padding: 9px 12px; border: 1px solid color-mix(in srgb, var(--cxy-isle-border-strong) 72%, transparent); border-radius: var(--cxy-radius-pill); color: var(--cxy-isle-muted); background: color-mix(in srgb, var(--cxy-isle-surface-card) 82%, transparent); backdrop-filter: blur(12px); font: 600 10px/1 var(--cxy-font-num); letter-spacing: .12em; }
.signal-orbit i { width: 6px; height: 6px; border-radius: 50%; background: var(--cxy-isle-border-strong); }
.orbit-skill { left: 0; top: 47%; }
.orbit-agent { right: 0; top: 24%; }
.orbit-graph { right: 7%; bottom: 13%; }
.signal-scan { position: absolute; left: 50%; top: 50%; z-index: 1; width: 45%; height: 1px; transform-origin: left center; background: linear-gradient(90deg, color-mix(in srgb, var(--cxy-cyan) 58%, transparent), transparent); opacity: .42; }
.signal-code { position: absolute; color: color-mix(in srgb, var(--cxy-isle-muted) 72%, transparent); font: 500 9px/1 var(--cxy-font-num); letter-spacing: .1em; }
.code-a { top: 8%; left: 19%; }
.code-b { bottom: 9%; left: 13%; }

.ai-matrix { padding: 112px 0; background: var(--cxy-surface-page); }
.ai-section-heading { max-width: 720px; margin-bottom: var(--cxy-space-10); }
.ai-section-heading > span { display: block; margin-bottom: var(--cxy-space-4); color: var(--cxy-action); font: 600 11px/1 var(--cxy-font-num); letter-spacing: .2em; }
.ai-section-heading h2 { margin: 0; color: var(--cxy-ink); font-size: clamp(34px, 4vw, 52px); line-height: 1.2; letter-spacing: -.035em; }
.ai-section-heading p { margin-top: var(--cxy-space-4); color: var(--cxy-text); font-size: 16px; line-height: 1.7; }
.ai-bento { display: grid; grid-template-columns: repeat(12, 1fr); grid-auto-rows: minmax(224px, auto); gap: var(--cxy-space-5); }
.ai-card { position: relative; overflow: hidden; border: 1px solid var(--cxy-border); border-radius: var(--cxy-radius-2xl); background: var(--cxy-surface-card); box-shadow: var(--cxy-elevation-1); }
.ai-card-top { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; }
.ai-card-index { color: var(--cxy-muted); font: 600 10px/1 var(--cxy-font-num); letter-spacing: .16em; }
.ai-status { display: inline-flex; align-items: center; gap: 7px; padding: 7px 10px; border: 1px solid var(--cxy-border); border-radius: var(--cxy-radius-pill); color: var(--cxy-muted); background: var(--cxy-surface-subtle); font-size: 11px; font-weight: var(--cxy-weight-semibold); }
.ai-status-live { color: var(--cxy-positive-ink); background: var(--cxy-tint-green-bg); border-color: color-mix(in srgb, var(--cxy-positive) 18%, var(--cxy-border)); }
.ai-status-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--cxy-positive); }
.ai-card-mcp { isolation: isolate; grid-column: span 7; grid-row: span 3; min-height: 740px; padding: var(--cxy-space-8); color: var(--cxy-isle-ink); background: linear-gradient(145deg, #0a1730 0%, #0a2940 46%, #151c42 100%); border-color: color-mix(in srgb, var(--cxy-cyan) 24%, var(--cxy-isle-border)); }
.ai-card-mcp::before { content: ""; position: absolute; z-index: -2; inset: -22% -36% 28% 18%; border-radius: 44%; background: conic-gradient(from 210deg, color-mix(in srgb, var(--cxy-blue) 34%, transparent), color-mix(in srgb, var(--cxy-cyan) 30%, transparent), color-mix(in srgb, var(--cxy-positive) 11%, transparent), color-mix(in srgb, var(--cxy-violet) 19%, transparent), color-mix(in srgb, var(--cxy-blue) 34%, transparent)); filter: blur(56px); }
.ai-card-mcp::after { content: ""; position: absolute; z-index: -1; inset: 0; background-image: linear-gradient(color-mix(in srgb, var(--cxy-isle-border) 48%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--cxy-isle-border) 48%, transparent) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(to bottom, black, transparent 62%); opacity: .26; }
.ai-card-mcp .ai-card-index { color: var(--cxy-isle-muted); }
.ai-card-mcp .ai-status-live { color: var(--cxy-isle-tint-green-fg); background: var(--cxy-isle-tint-green-bg); border-color: var(--cxy-isle-border); }
.mcp-fluid-field { position: absolute; z-index: 1; inset: 0; overflow: hidden; border: 0; border-radius: inherit; background: radial-gradient(circle at 72% 18%, color-mix(in srgb, var(--cxy-cyan) 18%, transparent), transparent 34%), radial-gradient(circle at 22% 48%, color-mix(in srgb, var(--cxy-blue) 24%, transparent), transparent 39%), linear-gradient(145deg, color-mix(in srgb, white 3%, transparent), color-mix(in srgb, var(--cxy-blue) 5%, transparent)); box-shadow: inset 0 1px color-mix(in srgb, white 12%, transparent), inset 0 -230px 180px color-mix(in srgb, #020817 44%, transparent); }
.mcp-fluid-field::before, .mcp-fluid-field::after { content: ""; position: absolute; left: -10%; width: 120%; height: 52px; border: 1px solid color-mix(in srgb, var(--cxy-cyan) 36%, transparent); border-left: 0; border-right: 0; border-radius: 50%; filter: drop-shadow(0 0 18px color-mix(in srgb, var(--cxy-cyan) 18%, transparent)); }
.mcp-fluid-field::before { top: 38%; transform: rotate(-6deg); }.mcp-fluid-field::after { top: 60%; transform: rotate(7deg); border-color: color-mix(in srgb, var(--cxy-action) 38%, transparent); }
.mcp-fluid-field > i { position: absolute; border-radius: 46%; mix-blend-mode: screen; filter: blur(28px); opacity: .72; }
.mcp-fluid-field .fluid-one { width: 58%; height: 48%; right: -8%; top: -7%; background: color-mix(in srgb, var(--cxy-cyan) 42%, transparent); }
.mcp-fluid-field .fluid-two { width: 52%; height: 49%; left: 5%; top: 20%; background: color-mix(in srgb, var(--cxy-blue) 42%, transparent); }
.mcp-fluid-field .fluid-three { width: 46%; height: 40%; right: 11%; bottom: -12%; background: color-mix(in srgb, var(--cxy-violet) 28%, transparent); }
.mcp-fluid-field > b { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--cxy-cyan); box-shadow: 0 0 0 8px color-mix(in srgb, var(--cxy-cyan) 7%, transparent), 0 0 28px var(--cxy-cyan); }
.mcp-fluid-field > b:nth-of-type(1) { left: 15%; top: 30%; }.mcp-fluid-field > b:nth-of-type(2) { left: 54%; top: 17%; background: var(--cxy-positive); }.mcp-fluid-field > b:nth-of-type(3) { right: 11%; bottom: 19%; background: var(--cxy-action); }
.mcp-wordmark { position: absolute; z-index: 2; right: 36px; top: 92px; color: color-mix(in srgb, var(--cxy-isle-ink) 5%, transparent); font: 700 clamp(108px, 11vw, 170px)/.8 var(--cxy-font-num); letter-spacing: -.08em; -webkit-text-stroke: 1px color-mix(in srgb, var(--cxy-cyan) 32%, transparent); text-shadow: 0 0 52px color-mix(in srgb, var(--cxy-cyan) 12%, transparent); }
.ai-card-copy { position: absolute; z-index: 3; left: var(--cxy-space-8); right: var(--cxy-space-8); bottom: var(--cxy-space-8); }
.ai-card-label { margin: 0 0 var(--cxy-space-3); color: var(--cxy-action); font: 600 11px/1 var(--cxy-font-num); letter-spacing: .15em; }
.ai-card-mcp .ai-card-label { color: var(--cxy-isle-tint-cyan-fg); }
.ai-card-copy h3 { max-width: 650px; margin: 0 0 var(--cxy-space-4); color: var(--cxy-isle-ink); font-size: clamp(38px, 3.65vw, 52px); line-height: 1.14; letter-spacing: -.04em; }
.ai-card-subtitle { max-width: 600px; margin: 0; color: var(--cxy-isle-ink-2); font-size: 19px; line-height: 1.6; }
.ai-card-note { max-width: 600px; margin: var(--cxy-space-3) 0 0; color: var(--cxy-isle-muted); font-size: var(--cxy-size-sm); }
.ai-card-copy ul { display: flex; flex-wrap: wrap; gap: var(--cxy-space-2); list-style: none; margin: var(--cxy-space-6) 0 0; padding: 0; }
.ai-card-copy li { padding: 8px 11px; border: 1px solid var(--cxy-isle-border); border-radius: var(--cxy-radius-pill); color: var(--cxy-isle-muted); font-size: 11px; }
.ai-card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cxy-space-5); margin-top: var(--cxy-space-7); }
.ai-card-link { display: inline-flex; color: var(--cxy-isle-tint-cyan-fg); font-size: var(--cxy-size-sm); font-weight: var(--cxy-weight-semibold); }
.ai-card-login { display: inline-flex; color: var(--cxy-isle-ink-2); font-size: var(--cxy-size-sm); font-weight: var(--cxy-weight-semibold); }
.ai-card-small { grid-column: span 5; min-height: 258px; padding: var(--cxy-space-7); }
.ai-card-small .ai-card-label { margin-top: var(--cxy-space-8); }
.ai-card-small h3 { margin: 0 0 var(--cxy-space-3); color: var(--cxy-ink); font-size: 25px; line-height: 1.3; letter-spacing: -.025em; }
.ai-card-small > p:not(.ai-card-label) { max-width: 460px; margin: 0; color: var(--cxy-text); font-size: var(--cxy-size-sm); line-height: 1.65; }
.ai-promo-tags { display: flex; flex-wrap: wrap; gap: var(--cxy-space-2); margin-top: var(--cxy-space-5); }
.ai-promo-tags span { display: inline-flex; min-height: 32px; padding: 0 10px; align-items: center; border: 1px solid color-mix(in srgb, var(--cxy-action) 10%, var(--cxy-border)); border-radius: var(--cxy-radius-sm); color: var(--cxy-ink-2); background: var(--cxy-surface-subtle); font-size: 11px; font-weight: var(--cxy-weight-medium); }

.ai-flow { padding: 112px 0; background: linear-gradient(180deg, var(--cxy-surface-subtle), var(--cxy-surface-page)); }
.ai-flow-stage { position: relative; overflow: hidden; min-height: 0; padding: var(--cxy-space-8); border-top: 1px solid color-mix(in srgb, var(--cxy-action) 14%, var(--cxy-border)); border-bottom: 1px solid color-mix(in srgb, var(--cxy-cyan) 18%, var(--cxy-border)); background: radial-gradient(circle at 14% 36%, color-mix(in srgb, var(--cxy-blue) 10%, transparent), transparent 28%), radial-gradient(circle at 82% 58%, color-mix(in srgb, var(--cxy-cyan) 10%, transparent), transparent 31%), linear-gradient(110deg, color-mix(in srgb, white 82%, transparent), color-mix(in srgb, var(--cxy-tint-blue-bg) 54%, transparent), color-mix(in srgb, white 88%, transparent)); }
.ai-flow-stage::before { content: ""; position: absolute; width: 42%; height: 180%; left: 28%; top: -42%; border-radius: 50%; background: conic-gradient(from 150deg, color-mix(in srgb, var(--cxy-blue) 13%, transparent), color-mix(in srgb, var(--cxy-cyan) 16%, transparent), color-mix(in srgb, var(--cxy-violet) 8%, transparent), color-mix(in srgb, var(--cxy-blue) 13%, transparent)); filter: blur(48px); opacity: .78; }
.ai-flow-rail { position: absolute; z-index: 1; left: 9%; right: 9%; top: 73px; height: 2px; background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--cxy-action) 58%, transparent) 10%, color-mix(in srgb, var(--cxy-cyan) 72%, transparent) 88%, transparent); box-shadow: 0 0 22px color-mix(in srgb, var(--cxy-cyan) 16%, transparent); }
.ai-flow-rail span { position: absolute; left: 0; top: 50%; width: 88px; height: 3px; transform: translateY(-50%); border-radius: 4px; background: linear-gradient(90deg, transparent, white, var(--cxy-cyan), transparent); filter: drop-shadow(0 0 9px var(--cxy-cyan)); }
.ai-flow-list { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--cxy-space-4); list-style: none; margin: 0; padding: 0; }
.ai-flow-list li { position: relative; min-height: 250px; padding: 74px var(--cxy-space-6) var(--cxy-space-6); border: 1px solid color-mix(in srgb, var(--cxy-action) 10%, var(--cxy-border)); border-radius: var(--cxy-radius-lg); background: color-mix(in srgb, var(--cxy-surface-card) 90%, transparent); box-shadow: var(--cxy-elevation-1); backdrop-filter: blur(14px); }
.ai-flow-list li::after { display: none; }
.ai-flow-list li > b { position: absolute; z-index: 3; left: 25px; top: 30px; width: 11px; height: 11px; border: 2px solid white; border-radius: 50%; background: var(--cxy-action); box-shadow: 0 0 0 8px color-mix(in srgb, var(--cxy-action) 8%, transparent), 0 0 24px color-mix(in srgb, var(--cxy-action) 44%, transparent); }
.ai-flow-list li:nth-child(2) > b, .ai-flow-list li:nth-child(4) > b { background: var(--cxy-cyan); box-shadow: 0 0 0 8px color-mix(in srgb, var(--cxy-cyan) 8%, transparent), 0 0 24px color-mix(in srgb, var(--cxy-cyan) 44%, transparent); }
.ai-flow-list li > div { position: static; }
.ai-flow-list li:nth-child(odd) > div, .ai-flow-list li:nth-child(even) > div { position: static; }
.ai-flow-list li span { color: var(--cxy-action); font: 600 10px/1 var(--cxy-font-num); letter-spacing: .15em; }
.ai-flow-list h3 { margin: var(--cxy-space-4) 0 var(--cxy-space-3); color: var(--cxy-ink); font-size: clamp(24px, 2.2vw, 31px); letter-spacing: -.025em; }
.ai-flow-list p { max-width: 230px; margin: 0; color: var(--cxy-text); font-size: var(--cxy-size-sm); line-height: 1.65; }
.ai-use-note { padding: var(--cxy-space-7) 0; border-top: 1px solid var(--cxy-border); background: var(--cxy-surface-page); }
/* V22-A6（F1）：版心放宽至 1050px + 字号降一档，桌面一行放下不折行；
   mark 34→28px、圆角 10→9px，向 MCP 站 ai-responsibility 的精致比例靠（J6 审美基准） */
.ai-use-note-in { display: flex; align-items: center; gap: 12px; max-width: 1050px; color: var(--cxy-muted); font-size: 13px; line-height: 1.7; }
.ai-use-note-mark { flex: 0 0 auto; display: inline-grid; width: 28px; height: 28px; place-items: center; border: 1px solid color-mix(in srgb, var(--cxy-action) 18%, var(--cxy-border)); border-radius: 9px; color: var(--cxy-action); background: var(--cxy-tint-blue-bg); font: 800 10px/1 var(--cxy-font-num); letter-spacing: 0.02em; }
.ai-use-note p { margin: 0; }
@media (max-width: 768px) {
  .ai-use-note-in { align-items: flex-start; }
}
.ai-feedback { position: relative; display: inline-block; }
.ai-feedback button { appearance: none; padding: 0; border: 0; cursor: pointer; color: var(--cxy-action); background: none; font: inherit; font-weight: var(--cxy-weight-semibold); }
.ai-feedback-popover { position: absolute; z-index: 30; left: 50%; bottom: calc(100% + 12px); display: grid; visibility: hidden; width: 236px; padding: 10px; opacity: 0; transform: translate(-50%, 6px); border: 1px solid var(--cxy-border); border-radius: 16px; color: var(--cxy-ink); background: var(--cxy-surface-card); box-shadow: var(--cxy-elevation-3); text-align: center; transition: opacity .18s ease, transform .18s ease, visibility .18s ease; }
.ai-feedback:hover .ai-feedback-popover, .ai-feedback:focus-within .ai-feedback-popover { visibility: visible; opacity: 1; transform: translate(-50%, 0); }
.ai-feedback-popover img { width: 100%; border-radius: 10px; }
.ai-feedback-popover strong { margin-top: 8px; }
.ai-feedback-popover span { color: var(--cxy-muted); font-size: 11px; }
.ai-final { padding: 104px 0; text-align: center; color: var(--cxy-isle-ink); background: var(--cxy-isle-bg); }
.ai-final-in { max-width: 760px; }
.ai-final-kicker { color: var(--cxy-isle-tint-cyan-fg); font: 600 11px/1 var(--cxy-font-num); letter-spacing: .2em; }
.ai-final h2 { margin: var(--cxy-space-5) 0 var(--cxy-space-4); color: var(--cxy-isle-ink); font-size: clamp(34px, 4vw, 50px); }
.ai-final-break { display: none; }
.ai-final p { max-width: 620px; margin: 0 auto var(--cxy-space-7); color: var(--cxy-isle-text); line-height: 1.75; }
.ai-final-actions { display: flex; align-items: center; justify-content: center; gap: var(--cxy-space-4); }

@media (max-width: 1020px) {
  .ai-hero { min-height: auto; }
  .ai-hero-in { grid-template-columns: 1fr; }
  .ai-signal { width: min(510px, 86vw); margin: var(--cxy-space-9) auto 0; }
  .ai-card-mcp, .ai-card-small { grid-column: span 12; }
  .ai-card-mcp { grid-row: auto; min-height: 610px; }
  .ai-flow-stage { padding-inline: var(--cxy-space-5); }
}
@media (max-width: 640px) {
  .ai-hero { padding: 84px 0 72px; }
  .ai-copy h1 { font-size: 39px; line-height: 1.12; }
  .ai-copy h1 span { white-space: normal; }
  .ai-copy > p { font-size: 16px; }
  .ai-actions { flex-direction: column; }
  .ai-button { width: 100%; }
  .ai-state-line { display: grid; grid-template-columns: repeat(2, 1fr); }
  .ai-signal { width: 100vw; margin-left: calc((100vw - 100%) / -2); }
  .signal-code { display: none; }
  .signal-core { width: 178px; height: 178px; }
  .signal-core strong { font-size: 18px; }
  .ai-matrix, .ai-flow { padding: 84px 0; }
  .ai-section-heading h2 { font-size: 35px; }
  .ai-card-mcp { min-height: 620px; padding: var(--cxy-space-6); }
  .mcp-fluid-field { inset: 0; height: auto; }
  .mcp-wordmark { top: 100px; right: 20px; font-size: 104px; }
  .ai-card-copy { left: var(--cxy-space-6); right: var(--cxy-space-6); bottom: var(--cxy-space-6); }
  .ai-card-copy h3 { font-size: 36px; }
  .ai-card-subtitle { font-size: 17px; }
  .ai-card-copy ul { display: grid; }
  .ai-card-small { min-height: 270px; padding: var(--cxy-space-6); }
  .ai-final-actions { flex-direction: column; }
  .ai-final-break { display: inline; }
  .ai-feedback-popover { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 6px); }
  .ai-feedback:hover .ai-feedback-popover, .ai-feedback:focus-within .ai-feedback-popover { transform: translate(-50%, 0); }
  .ai-flow-stage { min-height: 0; padding: var(--cxy-space-4); }
  .ai-flow-list { grid-template-columns: 1fr; gap: var(--cxy-space-4); }
  .ai-flow-list li { min-height: 0; padding: 64px var(--cxy-space-5) var(--cxy-space-5); }
  .ai-flow-list li::after { display: none; }
  .ai-flow-list li > b { left: 24px; top: 26px; }
  .ai-flow-list li > div, .ai-flow-list li:nth-child(odd) > div, .ai-flow-list li:nth-child(even) > div { position: static; transform: none; }
  .ai-flow-rail { display: none; }
}

@media (prefers-reduced-motion: no-preference) {
  .signal-aurora { animation: signal-aurora 8s ease-in-out infinite alternate; }
  .halo-one { animation: signal-spin 17s linear infinite; }
  .halo-two { animation: signal-spin-reverse 25s linear infinite; }
  .halo-three { animation: signal-spin 12s linear infinite; }
  .signal-scan { animation: signal-sweep 9s linear infinite; }
  .signal-orbit { animation: signal-float 4.8s ease-in-out infinite; }
  .orbit-agent { animation-delay: -1.6s; }.orbit-graph { animation-delay: -3.2s; }
  .ai-card-mcp::before { animation: card-aurora 10s ease-in-out infinite alternate; }
  .mcp-fluid-field .fluid-one { animation: fluid-one 8s ease-in-out infinite alternate; }
  .mcp-fluid-field .fluid-two { animation: fluid-two 10s ease-in-out infinite alternate; }
  .mcp-fluid-field .fluid-three { animation: fluid-three 7s ease-in-out infinite alternate; }
  .mcp-fluid-field::before { animation: fluid-line-one 7s ease-in-out infinite alternate; }
  .mcp-fluid-field::after { animation: fluid-line-two 9s ease-in-out infinite alternate; }
  .mcp-fluid-field > b { animation: fluid-node 3s ease-in-out infinite; }
  .ai-flow-rail span { animation: flow-pulse-x 5.2s linear infinite; }
  .ai-flow-list li > b { animation: flow-node-pulse 2.8s ease-in-out infinite; }
  @keyframes signal-spin { to { transform: rotate(360deg); } }
  @keyframes signal-spin-reverse { to { transform: rotate(-360deg); } }
  @keyframes signal-sweep { to { transform: rotate(360deg); } }
  @keyframes signal-aurora { 0% { transform: rotate(-14deg) scale(.9); opacity: .5; } 54% { transform: rotate(12deg) scale(1.1); opacity: .88; } 100% { transform: rotate(28deg) scale(.98); opacity: .64; } }
  @keyframes signal-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
  @keyframes card-aurora { 0% { transform: translate3d(-3%, -2%, 0) rotate(-5deg); opacity: .55; } 100% { transform: translate3d(8%, 5%, 0) rotate(16deg); opacity: .9; } }
  @keyframes fluid-one { to { transform: translate3d(-34%, 18%, 0) rotate(22deg) scale(1.12); } }
  @keyframes fluid-two { to { transform: translate3d(38%, -20%, 0) rotate(-18deg) scale(.9); } }
  @keyframes fluid-three { to { transform: translate3d(-28%, -18%, 0) rotate(28deg) scale(1.18); } }
  @keyframes fluid-line-one { to { transform: translateX(6%) rotate(-2deg); opacity: .48; } }
  @keyframes fluid-line-two { to { transform: translateX(-7%) rotate(3deg); opacity: .54; } }
  @keyframes fluid-node { 0%, 100% { opacity: .62; } 50% { opacity: 1; transform: scale(1.18); } }
  @keyframes flow-pulse-x { from { left: 0; } to { left: calc(100% - 88px); } }
  @keyframes flow-node-pulse { 0%, 100% { opacity: .58; } 50% { opacity: 1; transform: scale(1.22); } }
}

@media (max-width: 640px) and (prefers-reduced-motion: no-preference) {
  .ai-flow-rail span { animation-name: flow-pulse-y; }
  @keyframes flow-pulse-y { from { top: 0; } to { top: calc(100% - 68px); } }
}