:root {
	--bg: #f7f9fb;
	--surface: #ffffff;
	--ink: #0f1419;
	--mute: #536471;
	--line: #eff3f4;
	--blue: #1da1f2;
	--blue-deep: #1991da;
	--blue-dim: rgba(29, 161, 242, 0.12);
	--font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang TC",
		"Microsoft JhengHei", sans-serif;
	--ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	min-height: 100%;
	background: var(--bg);
	color: var(--ink);
	font-family: var(--font);
	font-feature-settings: "cv02", "cv03", "cv04", "cv11";
	-webkit-font-smoothing: antialiased;
}

body {
	overflow-x: hidden;
}

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

.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

button,
input {
	font: inherit;
	color: inherit;
}

.teaser {
	min-height: 100dvh;
	display: flex;
	flex-direction: column;
	background:
		radial-gradient(ellipse 90% 55% at 50% -18%, rgba(29, 161, 242, 0.22), transparent 58%),
		radial-gradient(ellipse 50% 40% at 100% 8%, rgba(15, 126, 200, 0.1), transparent 52%),
		radial-gradient(ellipse 45% 35% at 0% 30%, rgba(29, 161, 242, 0.08), transparent 50%),
		var(--bg);
}

.teaser > main {
	flex: 1;
	display: flex;
	flex-direction: column;
}

.teaser-nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	padding: 20px clamp(20px, 4vw, 40px);
	padding-top: calc(20px + env(safe-area-inset-top, 0px));
}

.teaser-logo {
	display: inline-flex;
	align-items: center;
}

.teaser-logo img {
	display: block;
	height: 26px;
	width: auto;
	filter: brightness(0) saturate(100%) invert(54%) sepia(98%) saturate(1956%) hue-rotate(180deg) brightness(102%)
		contrast(101%);
}

.teaser-nav-link {
	font-size: 14px;
	font-weight: 700;
	color: var(--mute);
	transition: color 0.2s var(--ease);
}

.teaser-nav-link:hover {
	color: var(--blue);
}

.teaser-hero {
	flex: 1;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
	padding: 24px 24px 56px;
	max-width: 720px;
	margin: 0 auto;
	width: 100%;
	min-height: calc(100dvh - 72px);
}

.teaser-mark {
	width: 88px;
	height: 88px;
	margin: 0 0 28px;
	border-radius: 22px;
	object-fit: contain;
	animation: teaser-float 5.5s var(--ease) infinite;
	filter: drop-shadow(0 18px 36px rgba(29, 161, 242, 0.28));
}

.teaser-brand {
	margin: 0 0 18px;
	font-size: clamp(42px, 9vw, 72px);
	font-weight: 800;
	letter-spacing: -0.05em;
	line-height: 0.95;
	color: var(--blue);
	animation: teaser-rise 0.85s var(--ease) 0.06s both;
}

.teaser-title {
	margin: 0;
	font-size: clamp(28px, 5.5vw, 44px);
	font-weight: 800;
	letter-spacing: -0.035em;
	line-height: 1.15;
	animation: teaser-rise 0.85s var(--ease) 0.14s both;
}

.teaser-lead {
	margin: 16px 0 0;
	max-width: 28em;
	font-size: clamp(16px, 2.4vw, 18px);
	font-weight: 500;
	line-height: 1.65;
	color: var(--mute);
	animation: teaser-rise 0.85s var(--ease) 0.22s both;
}

.teaser-form {
	width: 100%;
	max-width: 440px;
	margin-top: 36px;
	animation: teaser-rise 0.85s var(--ease) 0.3s both;
}

.teaser-form-row {
	display: flex;
	gap: 10px;
	padding: 6px;
	border: 1px solid #cfd9de;
	border-radius: 999px;
	background: var(--surface);
	box-shadow: 0 10px 28px rgba(15, 20, 25, 0.06);
	transition:
		border-color 0.2s var(--ease),
		box-shadow 0.2s var(--ease);
}

.teaser-form-row:focus-within {
	border-color: var(--blue);
	box-shadow:
		0 0 0 3px rgba(29, 161, 242, 0.15),
		0 10px 28px rgba(15, 20, 25, 0.06);
}

.teaser-form input[type="email"] {
	flex: 1;
	min-width: 0;
	height: 44px;
	padding: 0 18px;
	border: 0;
	background: transparent;
	outline: none;
	font-size: 16px;
}

.teaser-form input::placeholder {
	color: #8b98a5;
}

.teaser-submit {
	flex-shrink: 0;
	height: 44px;
	padding: 0 22px;
	border: 0;
	border-radius: 999px;
	background: var(--blue);
	color: #fff;
	font-size: 14px;
	font-weight: 700;
	cursor: pointer;
	transition:
		background 0.2s var(--ease),
		transform 0.2s var(--ease);
}

.teaser-submit:hover:not(:disabled) {
	background: var(--blue-deep);
	transform: translateY(-1px);
}

.teaser-submit:disabled {
	opacity: 0.65;
	cursor: wait;
}

.teaser-form-note {
	margin: 12px 0 0;
	font-size: 13px;
	line-height: 1.5;
	color: var(--mute);
}

.teaser-form-status {
	margin: 14px 0 0;
	min-height: 1.4em;
	font-size: 14px;
	font-weight: 600;
	color: var(--blue);
}

.teaser-form-status[data-tone="error"] {
	color: #e0245e;
}

.teaser-form-status[data-tone="ok"] {
	color: #17bf63;
}

.teaser-about {
	padding: 0 clamp(24px, 5vw, 48px) clamp(64px, 10vw, 112px);
}

.teaser-about-inner {
	max-width: 720px;
	margin: 0 auto;
	padding-top: clamp(48px, 8vw, 80px);
	border-top: 1px solid var(--line);
}

.teaser-kicker {
	margin: 0 0 14px;
	font-size: 13px;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--blue);
}

.teaser-about h2 {
	margin: 0;
	font-size: clamp(26px, 4vw, 36px);
	font-weight: 800;
	letter-spacing: -0.03em;
	line-height: 1.2;
}

.teaser-about-body {
	margin: 18px 0 0;
	font-size: 17px;
	line-height: 1.75;
	color: var(--mute);
}

.teaser-points {
	margin: 40px 0 0;
	padding: 0;
	list-style: none;
	display: grid;
	gap: 0;
}

.teaser-points li {
	padding: 22px 0;
	border-top: 1px solid var(--line);
	display: grid;
	gap: 6px;
}

.teaser-points li:last-child {
	border-bottom: 1px solid var(--line);
}

.teaser-points strong {
	font-size: 18px;
	font-weight: 800;
	letter-spacing: -0.02em;
}

.teaser-points span {
	font-size: 15px;
	line-height: 1.6;
	color: var(--mute);
}

.teaser-footer {
	padding: 28px clamp(20px, 4vw, 40px) calc(28px + env(safe-area-inset-bottom, 0px));
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 12px 24px;
	border-top: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.55);
}

.teaser-footer p {
	margin: 0;
	font-size: 13px;
	color: var(--mute);
}

.teaser-footer a {
	font-size: 13px;
	font-weight: 700;
	color: var(--blue);
}

.teaser-footer a:hover {
	opacity: 0.8;
}

[data-reveal] {
	opacity: 0;
	transform: translateY(16px);
	transition:
		opacity 0.7s var(--ease),
		transform 0.7s var(--ease);
}

[data-reveal].is-in {
	opacity: 1;
	transform: translateY(0);
}

@keyframes teaser-rise {
	from {
		opacity: 0;
		transform: translateY(14px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

@keyframes teaser-float {
	0%,
	100% {
		transform: translateY(0);
	}
	50% {
		transform: translateY(-8px);
	}
}

@media (max-width: 560px) {
	.teaser-form-row {
		flex-direction: column;
		border-radius: 20px;
		padding: 10px;
	}

	.teaser-form input[type="email"] {
		height: 48px;
		padding: 0 14px;
		text-align: center;
	}

	.teaser-submit {
		width: 100%;
		height: 48px;
	}

	.teaser-footer {
		flex-direction: column;
		align-items: flex-start;
	}
}

@media (prefers-reduced-motion: reduce) {
	.teaser-mark,
	.teaser-brand,
	.teaser-title,
	.teaser-lead,
	.teaser-form {
		animation: none;
	}

	[data-reveal] {
		opacity: 1;
		transform: none;
		transition: none;
	}
}