/* ============================================================
   SmartSF v3 · "Daylight Studio"
   Light-first shell after plaud.ai; soft grey cards, pill buttons,
   serif brand wordmark + Archivo body, teal used sparingly.
   Dark exists ONLY inside .ssf-darkpanel media cards (image law:
   black renders never sit on light ground directly).
   Mobile-first. Desktop upgrades at 769px; header nav at 901px.
   ============================================================ */

/* ---------- Self-hosted fonts (no external dependency) ---------- */
@font-face {
	font-family: "Archivo";
	src: url("../img/archivo-var.woff2") format("woff2-variations");
	font-weight: 100 900;
	font-stretch: 62.5% 125%;
	font-style: normal;
	font-display: swap;
}
@font-face {
	font-family: "IBM Plex Mono";
	src: url("../img/plexmono-400.woff2") format("woff2");
	font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
	font-family: "IBM Plex Mono";
	src: url("../img/plexmono-500.woff2") format("woff2");
	font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
	font-family: "IBM Plex Mono";
	src: url("../img/plexmono-600.woff2") format("woff2");
	font-weight: 600; font-style: normal; font-display: swap;
}

:root {
	/* daylight surfaces */
	--bg: #ffffff;
	--bg-2: #f6f7f8;
	--card: #f5f6f7;
	--card-2: #eef0f3;
	--line: #e7eaee;
	--line-2: #d9dee3;

	/* ink */
	--ink: #101418;
	--ink-2: #454c54;
	--ink-3: #7c8590;

	/* dark media panels (the only dark left) */
	--dark: #101418;
	--dark-2: #1a2129;
	--dark-line: rgba(255, 255, 255, 0.1);
	--dark-ink: #e9eef2;
	--dark-ink-2: #9aa5af;

	/* brand signal */
	--teal: #18b0c2;
	--teal-deep: #0e8794;
	--teal-press: #0b6d78;
	--teal-soft: rgba(24, 176, 194, 0.1);
	--teal-mist: rgba(24, 176, 194, 0.055);

	/* legacy aliases kept for shared components (woocommerce.css) */
	--paper: #ffffff;
	--paper-2: #ffffff;
	--paper-3: #eef0f3;
	--teal-hi: #0e8794;
	--teal-glow: rgba(24, 176, 194, 0.22);
	--glow-shadow: 0 12px 32px -14px rgba(14, 135, 148, 0.45);

	--radius: 20px;
	--radius-lg: 28px;
	--radius-sm: 14px;
	--font: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	--mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
	--serif: "Times New Roman", "Georgia", serif; /* brand wordmark fallback */
	--pad: 22px;
	--header-h: 64px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--header-h) + 12px); background: var(--bg); }
body {
	margin: 0;
	font-family: var(--font);
	font-size: 16.5px;
	line-height: 1.62;
	color: var(--ink-2);
	background: var(--bg);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal-deep); text-decoration: none; }
a:hover { color: var(--teal-press); }
h1, h2, h3, h4 {
	color: var(--ink);
	line-height: 1.08;
	margin: 0 0 0.5em;
	font-weight: 520;
	letter-spacing: -0.022em;
	font-stretch: 105%;
	overflow-wrap: anywhere;
}
h3, h4 { font-weight: 560; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.2em; }

.screen-reader-text, .ssf-skip {
	position: absolute; width: 1px; height: 1px; overflow: hidden;
	clip: rect(0 0 0 0); white-space: nowrap;
}
.ssf-skip:focus {
	width: auto; height: auto; clip: auto; z-index: 100;
	left: 12px; top: 12px; background: var(--bg); padding: 10px 16px;
	border-radius: 8px; box-shadow: 0 10px 30px rgba(16, 20, 24, 0.18);
}

.ssf-container { max-width: 1280px; margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.ssf-container--narrow { max-width: 800px; }

/* ============================================================
   Quiet instrument accents (v3: grey, no glow, no brackets)
   ============================================================ */
.ssf-eyebrow {
	font-family: var(--mono);
	font-size: 11.5px;
	font-weight: 500;
	letter-spacing: 0.22em;
	text-transform: uppercase;
	color: var(--ink-3);
	margin: 0 0 16px;
	display: inline-flex;
	align-items: center;
	gap: 10px;
}

.ssf-dot {
	display: inline-block; width: 7px; height: 7px; border-radius: 50%;
	background: var(--teal); vertical-align: middle;
}
.ssf-dot--rec, .ssf-dot--live { background: var(--teal); }

/* light chip row (hero, CTA bands) */
.ssf-osdrow {
	display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center;
	font-size: 13px; color: var(--ink-3);
}
.ssf-osdrow .ssf-chip {
	display: inline-flex; align-items: center; gap: 7px;
	border-radius: 999px;
	padding: 7px 14px; color: var(--ink-2); white-space: nowrap;
	background: var(--card);
}

/* ============================================================
   Buttons — pills
   ============================================================ */
.ssf-btn {
	display: inline-flex; align-items: center; justify-content: center; gap: 9px;
	padding: 13px 28px; border-radius: 999px;
	font-family: var(--font);
	font-weight: 600; font-size: 0.95rem; line-height: 1.2; letter-spacing: 0.005em;
	border: 1.5px solid transparent; cursor: pointer;
	transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
		transform 0.2s ease, box-shadow 0.2s ease;
}
.ssf-btn--primary { background: var(--teal-deep); color: #ffffff; }
.ssf-btn--primary:hover { background: var(--teal-press); color: #ffffff; transform: translateY(-1px); box-shadow: var(--glow-shadow); }
.ssf-btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.ssf-btn--ghost:hover { border-color: var(--teal-deep); color: var(--teal-deep); background: var(--teal-soft); }
/* legacy dark-ghost class → same light ghost look */
.ssf-btn--ghost-dark { background: transparent; color: var(--ink); border-color: var(--line-2); }
.ssf-btn--ghost-dark:hover { border-color: var(--teal-deep); color: var(--teal-deep); background: var(--teal-soft); }
.ssf-btn--lg { padding: 16px 34px; font-size: 1.03rem; }

/* store badges */
.ssf-badges { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.ssf-badges img { height: 48px; width: auto; }
.ssf-badges a { display: inline-block; transition: transform 0.2s ease, opacity 0.2s ease; }
.ssf-badges a:hover { transform: translateY(-1px); opacity: 0.92; }

/* ============================================================
   Header — white, blur, hairline on stick
   ============================================================ */
.ssf-header {
	position: sticky; top: 0; z-index: 40;
	background: rgba(255, 255, 255, 0.86);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	border-bottom: 1px solid transparent;
	transition: border-color 0.25s ease;
}
.ssf-header.is-stuck { border-bottom-color: var(--line); }
.ssf-header__inner {
	max-width: 1280px; margin: 0 auto; padding: 0 var(--pad);
	height: var(--header-h);
	display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.ssf-logo { display: inline-flex; align-items: center; gap: 8px; min-width: 0; }
.ssf-logo img { height: 20px; width: auto; }
.ssf-logo__mark { font-weight: 700; letter-spacing: 0.16em; font-size: 15px; color: var(--ink); }
.ssf-logo__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); }
.ssf-logo__sub {
	font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.3em;
	color: var(--ink-3); text-transform: uppercase; padding-top: 3px;
}

.ssf-nav { display: none; }
.ssf-header__right { display: flex; align-items: center; gap: 10px; }
.ssf-header__buy { padding: 9px 20px; font-size: 0.88rem; }

/* Burger — explicit padding:0 (规范 A1) */
.ssf-burger {
	width: 44px; height: 44px; padding: 0; margin: 0;
	border: 0; background: transparent; color: var(--ink);
	display: inline-flex; align-items: center; justify-content: center;
	cursor: pointer; border-radius: 10px;
}
.ssf-burger:hover { background: var(--card); }
.ssf-burger__x { display: none; }
body.ssf-nav-open .ssf-burger__bars { display: none; }
body.ssf-nav-open .ssf-burger__x { display: block; }

/* Drawer — slides via right property (never translateX: 规范 A2) */
.ssf-drawer {
	position: fixed; top: 0; right: -440px; bottom: 0;
	width: min(86vw, 400px);
	background: var(--bg);
	border-left: 1px solid var(--line);
	z-index: 45;
	visibility: hidden;
	transition: right 0.3s ease, visibility 0s linear 0.3s;
	display: flex; flex-direction: column; justify-content: space-between;
	padding: calc(var(--header-h) + 26px) 30px 34px;
}
body.ssf-nav-open .ssf-drawer {
	right: 0; visibility: visible;
	transition: right 0.3s ease, visibility 0s;
}
.ssf-drawer__nav { display: flex; flex-direction: column; gap: 2px; }
.ssf-drawer__nav a {
	color: var(--ink); font-size: 1.3rem; font-weight: 600;
	padding: 13px 0; border-bottom: 1px solid var(--line);
	display: flex; justify-content: space-between; align-items: center;
}
.ssf-drawer__nav a::after {
	content: "→"; color: var(--ink-3); font-size: 1rem;
	transition: color 0.2s ease, transform 0.2s ease;
}
.ssf-drawer__nav a:hover::after { color: var(--teal-deep); transform: translateX(3px); }
.ssf-drawer__foot { display: grid; gap: 14px; }
.ssf-drawer__buy { width: 100%; }
.ssf-drawer__meta {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--ink-3); text-align: center;
}

.ssf-overlay {
	position: fixed; inset: 0; z-index: 42;
	background: rgba(16, 20, 24, 0.32);
	opacity: 0; transition: opacity 0.3s ease;
}
body.ssf-nav-open .ssf-overlay { opacity: 1; }

/* Drawer open: header above drawer, kill blur (WebKit bug — 规范 A1) */
body.ssf-nav-open .ssf-header {
	z-index: 50;
	backdrop-filter: none;
	-webkit-backdrop-filter: none;
	background: var(--bg);
}
body.ssf-nav-open { overflow: hidden; }

/* ============================================================
   Section shells — light only
   ============================================================ */
.ssf-paper { background: var(--bg); }
.ssf-paper--white { background: var(--bg); }
.ssf-alt { background: var(--bg-2); }
/* legacy: any leftover .ssf-night renders as light alt (never black) */
.ssf-night { background: var(--bg-2); color: var(--ink-2); }
.ssf-night h1, .ssf-night h2, .ssf-night h3, .ssf-night h4 { color: var(--ink); }

.ssf-sec { padding: 76px 0; }
.ssf-sec-head { max-width: 760px; margin-bottom: 44px; }
.ssf-sec-head h2 { font-size: clamp(1.9rem, 5.6vw, 3.1rem); }
.ssf-sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.ssf-sec-head--center .ssf-eyebrow { justify-content: center; }
.ssf-sec-sub { font-size: 1.1rem; color: var(--ink-3); }
.ssf-footnote { font-size: 0.85rem; color: var(--ink-3); }

/* ============================================================
   Hero — light studio panel (PLAUD/Pocket)
   ============================================================ */
.ssf-hero {
	position: relative;
	background:
		radial-gradient(110% 70% at 50% -18%, var(--teal-mist), transparent 60%),
		var(--bg);
	overflow: hidden;
	padding: 56px 0 48px;
}
.ssf-hero h1 {
	font-size: clamp(2.7rem, 10.5vw, 5rem);
	letter-spacing: -0.03em;
	margin-bottom: 22px;
}
.ssf-hero h1 em { font-style: normal; color: var(--teal-deep); }
.ssf-hero .ssf-container { position: relative; display: flex; flex-direction: column; gap: 40px; }
.ssf-hero__sub { font-size: 1.12rem; color: var(--ink-2); max-width: 33em; }
.ssf-hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.ssf-hero__chips { margin-top: 18px; }
.ssf-hero__figure { margin: 0; position: relative; min-width: 0; }
.ssf-hero__figure img { width: 100%; max-width: 720px; margin: 0 auto; }

/* soft studio panel that holds product imagery */
.ssf-heropanel {
	background: var(--card);
	border-radius: var(--radius-lg);
	padding: 26px;
	margin: 0;
}
.ssf-heropanel img { width: 100%; border-radius: var(--radius-sm); }
.ssf-heropanel figcaption {
	text-align: center; font-family: var(--mono); font-size: 10.5px;
	letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3);
	padding-top: 14px;
}

/* stat band — light (was telemetry) */
.ssf-tele { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg); }
.ssf-tele__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ssf-tele__cell {
	padding: 26px 18px;
	border-top: 1px solid var(--line);
	min-width: 0;
}
.ssf-tele__cell:nth-child(-n+2) { border-top: 0; }
.ssf-tele__num {
	color: var(--ink); font-weight: 620; font-stretch: 108%;
	font-size: clamp(1.6rem, 4.6vw, 2.3rem); letter-spacing: -0.02em; line-height: 1.05;
}
.ssf-tele__num small { font-size: 0.55em; font-weight: 600; color: var(--teal-deep); letter-spacing: 0; }
.ssf-tele__label {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--ink-3); margin-top: 8px;
}

/* ============================================================
   Split rows & cards
   ============================================================ */
.ssf-split { display: flex; flex-direction: column; gap: 40px; }
.ssf-split--flip { flex-direction: column; }
.ssf-split__copy { min-width: 0; }
.ssf-split__copy h2 { font-size: clamp(1.8rem, 5.4vw, 2.8rem); }
.ssf-split__media { margin: 0; min-width: 0; }
.ssf-split__media img { width: 100%; border-radius: var(--radius); }
/* product shots inside splits ride on a grey panel */
.ssf-split__media--panel { background: var(--card); border-radius: var(--radius-lg); padding: 24px; }

.ssf-ticks { list-style: none; padding: 0; margin: 20px 0; }
.ssf-ticks li { padding-left: 30px; position: relative; margin-bottom: 12px; }
.ssf-ticks li::before {
	content: ""; position: absolute; left: 0; top: 4px;
	width: 18px; height: 18px; border-radius: 50%;
	background-color: var(--teal-soft);
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.5l2.5 2.5L13 6.5' fill='none' stroke='%230e8794' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
	background-size: 18px;
}

/* cards — soft grey, borderless (PLAUD) */
.ssf-card, .ssf-ncard {
	background: var(--card);
	border: 1px solid transparent;
	border-radius: var(--radius);
	padding: 28px 26px;
	min-width: 0;
	transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.ssf-card:hover, .ssf-ncard:hover {
	transform: translateY(-2px);
	box-shadow: 0 18px 44px -22px rgba(16, 20, 24, 0.22);
	background: var(--card-2);
}
.ssf-card h3, .ssf-ncard h3 { font-size: 1.2rem; margin-bottom: 8px; }
.ssf-card p, .ssf-ncard p { color: var(--ink-2); margin: 0; font-size: 0.96rem; }
.ssf-ncard__num {
	font-family: var(--mono); font-size: 11px; font-weight: 600;
	letter-spacing: 0.2em; color: var(--teal-deep);
	display: block; margin-bottom: 12px; text-transform: uppercase;
}
.ssf-ncard__icon { margin-bottom: 16px; color: var(--teal-deep); }
.ssf-ncard__icon svg { display: block; }
/* white card variant for use on --alt ground */
.ssf-alt .ssf-card, .ssf-alt .ssf-ncard, .ssf-night .ssf-card, .ssf-night .ssf-ncard { background: var(--bg); }
.ssf-alt .ssf-card:hover, .ssf-alt .ssf-ncard:hover,
.ssf-night .ssf-card:hover, .ssf-night .ssf-ncard:hover { background: var(--bg); }

.ssf-grid-3 { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.ssf-grid-4 { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.ssf-grid-2 { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }

/* ============================================================
   Dark media panels — the only dark surfaces left (image law)
   ============================================================ */
.ssf-darkpanel {
	margin: 0; position: relative;
	background: linear-gradient(180deg, var(--dark-2), var(--dark));
	border-radius: var(--radius-lg);
	padding: 24px;
	overflow: hidden;
	min-width: 0;
}
.ssf-darkpanel img { width: 100%; border-radius: var(--radius-sm); }
.ssf-darkpanel figcaption {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em;
	text-transform: uppercase; color: var(--dark-ink-2);
	padding-top: 16px; display: flex; align-items: center; gap: 8px;
}
.ssf-darkpanel figcaption strong { color: var(--dark-ink); font-weight: 600; }
.ssf-duo { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }

/* ============================================================
   Feature index (H2 page)
   ============================================================ */
.ssf-feat {
	display: flex; gap: 16px; align-items: flex-start;
	padding: 22px 4px; border-top: 1px solid var(--line);
	min-width: 0;
}
.ssf-feat__icon { flex: 0 0 auto; color: var(--teal-deep); padding-top: 3px; }
.ssf-feat h3 { font-size: 1.05rem; margin-bottom: 4px; }
.ssf-feat p { color: var(--ink-2); font-size: 0.92rem; margin: 0; }

/* ============================================================
   Gallery (white-studio family only)
   ============================================================ */
.ssf-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.ssf-gallery figure {
	margin: 0; background: #fff; border: 1px solid var(--line);
	border-radius: var(--radius-sm); overflow: hidden; min-width: 0;
}
.ssf-gallery img { width: 100%; }
.ssf-gallery figcaption {
	font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--ink-3);
	padding: 8px 12px; border-top: 1px solid var(--card-2);
}

/* ============================================================
   In-the-box line-art grid (v3, supplier wireframes)
   ============================================================ */
.ssf-boxgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.ssf-boxitem {
	margin: 0; background: #fff; border: 1px solid var(--line);
	border-radius: var(--radius-sm); overflow: hidden; min-width: 0;
	position: relative;
}
.ssf-boxitem img { width: 100%; }
.ssf-boxitem figcaption {
	padding: 10px 14px 12px; border-top: 1px solid var(--card-2);
	font-size: 0.86rem; color: var(--ink-2); line-height: 1.35;
}
.ssf-boxitem figcaption small { display: block; color: var(--ink-3); font-size: 0.78rem; margin-top: 2px; }
.ssf-boxitem--opt::after {
	content: "Optional"; position: absolute; top: 10px; right: 10px;
	font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--ink-3);
	background: var(--card); border-radius: 999px; padding: 4px 10px;
}

/* ============================================================
   App page & phones
   ============================================================ */
.ssf-phones { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.ssf-phone { margin: 0; min-width: 0; }
/* screenshots ship inside their own device frame (transparent corners) —
   no extra border/radius; soft drop-shadow follows the frame silhouette */
.ssf-phone img {
	width: 100%;
	filter: drop-shadow(0 20px 32px rgba(16, 20, 24, 0.22));
}
.ssf-phone figcaption {
	text-align: center; font-family: var(--mono); font-size: 10.5px;
	letter-spacing: 0.14em; text-transform: uppercase;
	color: var(--ink-3); margin-top: 12px;
}

.ssf-applogo { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.ssf-applogo img {
	width: 74px; height: 74px; border-radius: 18px;
	border: 1px solid var(--line);
	background: #fff;
}
.ssf-applogo__name { color: var(--ink); font-weight: 650; font-size: 1.3rem; letter-spacing: 0.02em; }
.ssf-applogo__by {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em;
	text-transform: uppercase; color: var(--ink-3); margin-top: 3px;
}

/* ============================================================
   Plans
   ============================================================ */
.ssf-plans { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
.ssf-plan {
	position: relative;
	background: var(--card);
	border: 1.5px solid transparent;
	border-radius: var(--radius);
	padding: 30px 28px;
	min-width: 0;
	display: flex; flex-direction: column;
}
.ssf-plan--hot { background: #fff; border-color: var(--teal-deep); box-shadow: 0 24px 60px -30px rgba(14, 135, 148, 0.45); }
.ssf-plan__flag {
	position: absolute; top: -13px; left: 26px;
	background: var(--teal-deep); color: #fff;
	font-family: var(--mono); font-size: 10px; font-weight: 600;
	letter-spacing: 0.16em; text-transform: uppercase;
	border-radius: 999px; padding: 5px 13px;
}
.ssf-plan__name { font-size: 1.16rem; font-weight: 650; color: var(--ink); }
.ssf-plan__for {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em;
	text-transform: uppercase; color: var(--ink-3); margin: 4px 0 18px;
}
.ssf-plan__price { display: flex; align-items: baseline; gap: 6px; color: var(--ink); }
.ssf-plan__price strong { font-size: 2.5rem; font-weight: 620; letter-spacing: -0.03em; font-stretch: 106%; }
.ssf-plan__price span { color: var(--ink-3); font-size: 0.9rem; }
.ssf-plan__year { margin: 6px 0 20px; font-size: 0.9rem; color: var(--ink-3); }
.ssf-plan__year strong { color: var(--teal-deep); font-weight: 600; }
.ssf-plan .ssf-ticks { margin: 0 0 24px; flex: 1 1 auto; }
.ssf-plan .ssf-ticks li { font-size: 0.94rem; margin-bottom: 10px; }
.ssf-plan__cta { width: 100%; }

/* comparison table — scrolls inside its own container (规范 A2) */
.ssf-tablewrap {
	overflow-x: auto; -webkit-overflow-scrolling: touch;
	border: 1px solid var(--line); border-radius: var(--radius);
	background: #fff;
}
.ssf-table { border-collapse: collapse; width: 100%; min-width: 680px; font-size: 0.92rem; }
.ssf-table th, .ssf-table td {
	padding: 13px 16px; text-align: center; border-top: 1px solid var(--line);
	min-width: 110px;
}
.ssf-table th { background: var(--bg-2); color: var(--ink); font-weight: 600; border-top: 0; }
.ssf-table th small { display: block; font-weight: 500; color: var(--ink-3); font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; margin-top: 3px; }
.ssf-table td:first-child, .ssf-table th:first-child {
	text-align: left; color: var(--ink-2); min-width: 200px; font-weight: 500;
}
.ssf-table .yes { color: var(--teal-deep); font-weight: 700; }
.ssf-table .no { color: var(--line-2); }
.ssf-table tr:nth-child(even) td { background: var(--bg-2); }
.ssf-table .ssf-table__price td { font-weight: 650; color: var(--ink); font-size: 1rem; }

/* how-activation steps */
.ssf-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; counter-reset: step; }
.ssf-steps li {
	background: var(--card);
	border: 1px solid transparent; border-radius: var(--radius);
	padding: 28px 26px; min-width: 0;
}
.ssf-steps li::before {
	counter-increment: step;
	content: "0" counter(step);
	font-family: var(--mono); font-size: 12px; font-weight: 600;
	letter-spacing: 0.2em; color: var(--teal-deep);
	display: block; margin-bottom: 14px;
}
.ssf-steps h3 { font-size: 1.18rem; margin-bottom: 6px; }
.ssf-steps p { color: var(--ink-2); margin: 0; font-size: 0.95rem; }
.ssf-steps--paper li { background: var(--card); }
.ssf-alt .ssf-steps li, .ssf-night .ssf-steps li { background: var(--bg); }

/* ============================================================
   Specs table
   ============================================================ */
.ssf-specs dl { margin: 0; }
.ssf-specs dl > div {
	display: flex; flex-direction: column; gap: 2px;
	padding: 17px 0; border-bottom: 1px solid var(--line);
}
.ssf-specs dt {
	font-family: var(--mono); font-weight: 500; color: var(--ink);
	font-size: 0.85rem; letter-spacing: 0.06em; text-transform: uppercase;
}
.ssf-specs dd { margin: 0; color: var(--ink-2); font-size: 0.96rem; }

/* ============================================================
   FAQ accordion
   ============================================================ */
.ssf-faq details {
	background: var(--card); border: 1px solid transparent;
	border-radius: var(--radius-sm); margin-bottom: 12px;
	padding: 0 22px;
	transition: background 0.2s ease;
}
.ssf-faq details[open] { background: #fff; border-color: var(--teal-deep); }
.ssf-faq summary {
	cursor: pointer; font-weight: 600; color: var(--ink);
	padding: 18px 26px 18px 0; list-style: none; position: relative;
}
.ssf-faq summary::-webkit-details-marker { display: none; }
.ssf-faq summary::after {
	content: "+"; position: absolute; right: 0; top: 50%;
	transform: translateY(-50%);
	font-family: var(--mono);
	font-size: 1.25rem; font-weight: 400; color: var(--teal-deep);
}
.ssf-faq details[open] summary::after { content: "–"; }
.ssf-faq details p { color: var(--ink-2); padding-bottom: 18px; margin: 0; }
/* grey cards vanish on grey alt ground — go white there */
.ssf-alt .ssf-faq details, .ssf-night .ssf-faq details { background: #fff; }
.ssf-alt .ssf-faq details[open], .ssf-night .ssf-faq details[open] { background: #fff; }

/* ============================================================
   Page hero (inner pages) — light
   ============================================================ */
.ssf-phero {
	background:
		radial-gradient(110% 80% at 50% -25%, var(--teal-mist), transparent 62%),
		var(--bg);
	padding: 60px 0 48px;
	overflow: hidden;
}
.ssf-phero h1 { font-size: clamp(2.2rem, 7.6vw, 4rem); letter-spacing: -0.028em; }
.ssf-phero__sub { font-size: 1.1rem; max-width: 36em; color: var(--ink-2); }

/* sticky product subnav — light pill bar (Nest) */
.ssf-subnav {
	position: sticky; top: var(--header-h); z-index: 30;
	background: rgba(255, 255, 255, 0.9);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-top: 1px solid var(--line);
	border-bottom: 1px solid var(--line);
}
body.ssf-nav-open .ssf-subnav { backdrop-filter: none; -webkit-backdrop-filter: none; }
.ssf-subnav__inner {
	max-width: 1280px; margin: 0 auto; padding: 0 var(--pad);
	display: flex; align-items: center; gap: 20px;
	height: 54px;
}
.ssf-subnav__links {
	display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
	flex: 1 1 auto; min-width: 0;
}
.ssf-subnav__links::-webkit-scrollbar { display: none; }
.ssf-subnav__links a {
	font-size: 0.88rem; font-weight: 550; color: var(--ink-2); white-space: nowrap;
	padding: 7px 14px; border-radius: 999px;
}
.ssf-subnav__links a:hover { color: var(--ink); background: var(--card); }
.ssf-subnav__buy { flex: 0 0 auto; padding: 7px 18px; font-size: 0.82rem; }

/* ============================================================
   Trust strip / benefit rows
   ============================================================ */
.ssf-trust { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.ssf-trust__item {
	display: flex; align-items: center; gap: 12px;
	border-radius: var(--radius-sm);
	padding: 16px 18px; min-width: 0;
	background: var(--card);
}
.ssf-trust__item svg { flex: 0 0 auto; color: var(--teal-deep); }
.ssf-trust__item span { font-size: 0.9rem; color: var(--ink-2); }
.ssf-alt .ssf-trust__item, .ssf-night .ssf-trust__item { background: var(--bg); }

/* benefit list beside headlines (Nest) */
.ssf-benefits { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.ssf-benefits li {
	display: flex; gap: 12px; align-items: flex-start;
	padding: 12px 0; border-bottom: 1px solid var(--line);
	font-size: 0.96rem; color: var(--ink-2);
}
.ssf-benefits li:last-child { border-bottom: 0; }
.ssf-benefits svg { flex: 0 0 auto; color: var(--teal-deep); margin-top: 2px; }
.ssf-benefits strong { color: var(--ink); font-weight: 600; }

/* ============================================================
   Doc pages (legal / FAQ / contact)
   ============================================================ */
.ssf-doc { padding: 64px 0 96px; background: var(--bg); min-height: 50vh; }
.ssf-doc__head { margin-bottom: 36px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.ssf-doc__head h1 { font-size: clamp(2rem, 5vw, 2.9rem); margin: 0; }
.ssf-doc__kicker {
	font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
	text-transform: uppercase; color: var(--teal-deep); margin-bottom: 12px;
}
.ssf-doc__body h2 { font-size: 1.45rem; margin-top: 2em; }
.ssf-doc__body h3 { font-size: 1.15rem; margin-top: 1.6em; }
.ssf-doc__body p, .ssf-doc__body li { color: var(--ink-2); font-size: 0.98rem; }
.ssf-doc__body a { text-decoration: underline; text-underline-offset: 3px; }
.ssf-doc-cta { margin-top: 2em; }

/* Contact form */
.ssf-form { max-width: 560px; }
.ssf-form label { display: block; font-weight: 600; color: var(--ink); margin: 18px 0 6px; font-size: 0.95rem; }
.ssf-form input[type="text"], .ssf-form input[type="email"], .ssf-form textarea {
	width: 100%; padding: 12px 14px; border: 1.5px solid var(--line-2);
	border-radius: var(--radius-sm); font: inherit; color: var(--ink);
	background: #fff;
}
.ssf-form input:focus, .ssf-form textarea:focus { outline: none; border-color: var(--teal-deep); }
.ssf-form button { margin-top: 20px; }
.ssf-form-ok {
	background: var(--teal-soft); border: 1px solid var(--teal-deep);
	color: var(--teal-press); padding: 12px 18px; border-radius: var(--radius-sm);
	font-weight: 600;
}
.ssf-form-err {
	background: rgba(214, 69, 88, 0.07); border: 1px solid rgba(214, 69, 88, 0.4);
	color: #b8324a; padding: 12px 18px; border-radius: var(--radius-sm);
	font-weight: 600;
}
.ssf-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ============================================================
   Final CTA — light with a teal breath
   ============================================================ */
.ssf-final {
	background:
		radial-gradient(90% 90% at 50% 115%, rgba(24, 176, 194, 0.14), transparent 62%),
		var(--bg-2);
	padding: 96px 0;
	text-align: center;
	color: var(--ink-2);
}
.ssf-final h2 { font-size: clamp(2rem, 6vw, 3.5rem); }
.ssf-final .ssf-sec-sub { margin-bottom: 30px; }
.ssf-final .ssf-hero__chips { margin-top: 22px; }
.ssf-final .ssf-osdrow .ssf-chip { background: #fff; }

/* ============================================================
   Footer — light grey, quiet
   ============================================================ */
.ssf-footer { background: var(--bg-2); color: var(--ink-3); padding: 64px 0 36px; border-top: 1px solid var(--line); }
.ssf-footer__grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 36px; }
.ssf-footer .ssf-logo img { height: 18px; }
.ssf-footer__brand p { font-size: 0.93rem; max-width: 30em; margin-top: 14px; }
.ssf-footer__email a { color: var(--teal-deep); }
.ssf-footer__badges { margin-top: 18px; }
.ssf-footer__badges img { height: 40px; }
.ssf-footer__col { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.ssf-footer__col h4 {
	color: var(--ink); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.22em;
	text-transform: uppercase; margin-bottom: 8px; font-weight: 600;
}
.ssf-footer__col a { color: var(--ink-3); font-size: 0.93rem; }
.ssf-footer__col a:hover { color: var(--teal-deep); }
.ssf-footer__signup p { font-size: 0.9rem; margin-bottom: 12px; }
.ssf-subscribe { display: flex; flex-direction: column; gap: 10px; }
.ssf-subscribe input[type="email"] {
	padding: 12px 16px; border-radius: 999px; border: 1px solid var(--line-2);
	background: #fff; color: var(--ink); font: inherit;
}
.ssf-subscribe input[type="email"]::placeholder { color: var(--ink-3); }
.ssf-subscribe input[type="email"]:focus { outline: none; border-color: var(--teal-deep); }
.ssf-footer__bottom {
	margin-top: 52px; padding-top: 26px;
	border-top: 1px solid var(--line);
	display: flex; flex-direction: column; gap: 8px;
	font-size: 0.82rem;
}
.ssf-footer__bottom p { margin: 0; }
.ssf-footer__legal-links a { color: var(--ink-3); }
.ssf-footer__legal-links a:hover { color: var(--teal-deep); }

/* ============================================================
   Reveal animations
   ============================================================ */
/* ---------- v4: photo figures (real-world imagery) ---------- */
.ssf-photofig { margin: 0; min-width: 0; }
.ssf-photofig img { width: 100%; border-radius: var(--radius); display: block; }
.ssf-photofig figcaption {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em;
	text-transform: uppercase; color: var(--ink-3); padding: 14px 2px 6px;
}
.ssf-photofig p { color: var(--ink-2); font-size: 0.97rem; margin: 0 2px; max-width: 34em; }

/* ---------- v4: 4G flow diagram ---------- */
.ssf-flow {
	display: flex; flex-direction: column; align-items: stretch; gap: 10px;
	max-width: 860px; margin: 0 auto;
}
.ssf-flow__node {
	background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
	padding: 18px 20px; text-align: center; flex: 1 1 0; min-width: 0;
	display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.ssf-flow__node svg { color: var(--teal-deep); }
.ssf-flow__node strong { color: var(--ink); font-size: 0.98rem; }
.ssf-flow__node span { color: var(--ink-3); font-size: 0.85rem; line-height: 1.45; }
.ssf-flow__link {
	display: flex; align-items: center; justify-content: center;
	font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--teal-deep);
}
.ssf-flow__link span { position: relative; padding: 0 10px; }
.ssf-flow__link span::before, .ssf-flow__link span::after {
	content: ""; position: absolute; top: 50%; width: 14px; height: 1px;
	background: var(--line-2);
}
.ssf-flow__link span::before { right: 100%; }
.ssf-flow__link span::after { left: 100%; }

/* ---------- v4: comparison table ---------- */
.ssf-vs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.ssf-vs table {
	width: 100%; border-collapse: separate; border-spacing: 0;
	background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
	overflow: hidden; min-width: 520px;
}
.ssf-vs th, .ssf-vs td {
	padding: 14px 16px; text-align: left; font-size: 0.92rem;
	border-bottom: 1px solid var(--line);
}
.ssf-vs thead th {
	font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
	text-transform: uppercase; color: var(--ink-3); background: var(--card);
}
.ssf-vs thead th.ssf-vs__h2 { color: var(--teal-deep); }
.ssf-vs tbody th { font-weight: 600; color: var(--ink); width: 44%; }
.ssf-vs tbody td { color: var(--ink-3); }
.ssf-vs tbody td.ssf-vs__yes { color: var(--teal-deep); font-weight: 600; }
.ssf-vs tbody tr:last-child th, .ssf-vs tbody tr:last-child td { border-bottom: 0; }

.ssf-reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.45s ease-out, transform 0.45s ease-out; }
.ssf-reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
	.ssf-reveal { opacity: 1; transform: none; transition: none; }
	.ssf-btn, .ssf-ncard, .ssf-card { transition: none; }
}

/* ============================================================
   ≥769px — desktop upgrades (mobile-first: 规范 A3)
   ============================================================ */
@media (min-width: 769px) {
	:root { --header-h: 70px; --pad: 36px; }

	.ssf-sec { padding: 112px 0; }
	.ssf-sec--tight { padding: 84px 0; }

	.ssf-hero { padding: 84px 0 72px; }
	.ssf-hero .ssf-container { flex-direction: row; align-items: center; gap: 56px; }
	.ssf-hero__copy { flex: 1 1 0; min-width: 0; }
	.ssf-hero__figure { flex: 1.1 1 0; min-width: 0; }

	.ssf-tele__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
	.ssf-tele__cell { border-top: 0; border-left: 1px solid var(--line); padding: 34px 28px; }
	.ssf-tele__cell:first-child { border-left: 0; }

	.ssf-split { flex-direction: row; align-items: center; gap: 64px; }
	.ssf-split--flip { flex-direction: row-reverse; }
	.ssf-split__copy { flex: 1 1 0; }
	.ssf-split__media { flex: 1.05 1 0; }

	.ssf-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.ssf-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
	.ssf-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }

	.ssf-duo { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }

	.ssf-feat { padding: 26px 8px; }
	.ssf-feats-cols { columns: 2; column-gap: 48px; }
	.ssf-feats-cols .ssf-feat { break-inside: avoid; }

	.ssf-gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
	.ssf-boxgrid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
	.ssf-phones { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
	.ssf-phones--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

	.ssf-plans { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
	.ssf-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }

	.ssf-specs dl > div { flex-direction: row; gap: 28px; }
	.ssf-specs dt { flex: 0 0 240px; padding-top: 2px; }
	.ssf-specs dd { flex: 1 1 0; min-width: 0; }

	.ssf-trust { grid-template-columns: repeat(4, minmax(0, 1fr)); }

	.ssf-footer__grid { grid-template-columns: 1.5fr repeat(3, minmax(0, 0.75fr)) 1.25fr; gap: 32px; }
	.ssf-footer__bottom { flex-direction: row; justify-content: space-between; }
	.ssf-subscribe { flex-direction: row; }
	.ssf-subscribe input[type="email"] { flex: 1 1 0; min-width: 0; }
}

/* ============================================================
   ≥901px — desktop nav replaces burger (one header breakpoint)
   ============================================================ */
@media (min-width: 901px) {
	.ssf-nav { display: flex; align-items: center; gap: 28px; }
	.ssf-nav a {
		color: var(--ink-2); font-size: 0.93rem; font-weight: 550;
		transition: color 0.2s ease;
	}
	.ssf-nav a:hover { color: var(--ink); }
	.ssf-nav a[aria-current="page"] { color: var(--ink); }
	.ssf-nav__buy { padding: 9px 22px; font-size: 0.88rem; }
	/* Guard: nav link color must not override the button's white-on-teal text */
	.ssf-nav a.ssf-nav__buy { color: #fff; }
	.ssf-nav a.ssf-nav__buy:hover { color: #fff; }
	.ssf-header__right { display: none; }
	.ssf-drawer, .ssf-overlay { display: none; }
}

/* ============================================================
   v4 desktop upgrades
   ============================================================ */
@media (min-width: 769px) {
	.ssf-flow { flex-direction: row; align-items: stretch; }
	.ssf-flow__link { flex: 0 0 84px; }
	.ssf-flow__node { padding: 24px 22px; }
	.ssf-vs th, .ssf-vs td { padding: 16px 22px; font-size: 0.95rem; }
	.ssf-photofig p { font-size: 1rem; }
}