/* ============================================================
   格一科技 · Global Stylesheet
   Apple-style minimalist dark design language
   BEM naming · Mobile-first · WCAG-aware
   ============================================================ */

/* ---------------------- Tokens ---------------------- */
:root {
  /* Color */
  --c-bg: #000000;
  --c-bg-elev: #0a0a0c;
  --c-bg-soft: #111114;
  --c-surface: rgba(255, 255, 255, 0.04);
  --c-surface-strong: rgba(255, 255, 255, 0.07);
  --c-border: rgba(255, 255, 255, 0.08);
  --c-border-strong: rgba(255, 255, 255, 0.16);

  --c-text: #f5f5f7;
  --c-text-mute: #a1a1a6;
  --c-text-dim: #6e6e73;

  --c-accent: #e8e8ed;
  --c-accent-soft: rgba(232, 232, 237, 0.12);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "Helvetica Neue", "PingFang SC", "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace,
    Menlo, Consolas, monospace;

  /* Spacing & radius */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-full: 999px;

  /* Layout */
  --nav-h: 64px;
  --container: 1120px;
  --container-wide: 1280px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.2s;
  --t: 0.4s;
  --t-slow: 0.8s;
}

/* ---------------------- Reset ---------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }
input, textarea { font: inherit; }

::selection { background: var(--c-accent); color: #000; }

/* Native-style momentum scrolling (iOS Safari) */
main { -webkit-overflow-scrolling: touch; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 999;
  padding: 8px 14px;
  background: #fff;
  color: #000;
  border-radius: var(--r-sm);
  font-size: 14px;
}
.skip-link:focus { top: 12px; }

/* ---------------------- Layout helpers ---------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.hide-sm { display: inline; }

.section-head {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
}
.section-head--center { margin-inline: auto; }

.section-head__eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  font-weight: 500;
  margin-bottom: 18px;
}

.section-head__title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 18px;
}

.section-head__desc {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-text-mute);
  line-height: 1.6;
}

/* ---------------------- Buttons ---------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: transform var(--t-fast) var(--ease-out),
    background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
  will-change: transform;
  white-space: nowrap;
}
.btn:active { transform: scale(0.96); }

.btn--solid {
  background: var(--c-accent);
  color: #000;
}
.btn--solid:hover {
  background: #fff;
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--c-surface);
  color: var(--c-text);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn--ghost:hover {
  background: var(--c-surface-strong);
  border-color: var(--c-border-strong);
  transform: translateY(-1px);
}

/* Arrow link */
.link--arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text);
  font-size: 15px;
  font-weight: 500;
  transition: gap var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease);
}
.link--arrow:hover { gap: 14px; color: #fff; }
.link--arrow span { transition: transform var(--t-fast) var(--ease-out); }
.link--arrow:hover span { transform: translateX(2px); }

/* ---------------------- Badge ---------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
}
.badge--soon {
  background: rgba(232, 232, 237, 0.08);
  color: var(--c-text-mute);
  border: 1px solid var(--c-border);
}
.badge--soon::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-text-dim);
}
.badge--review {
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.24);
}
.badge--dev {
  background: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.24);
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--t) var(--ease),
    backdrop-filter var(--t) var(--ease), border-color var(--t) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav[data-state="scrolled"] {
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--c-border);
}

.nav__inner {
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 16px;
}
.nav__logo-mark { color: var(--c-text); }

.nav__links {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav__link {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--c-text-mute);
  border-radius: var(--r-sm);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.nav__link:hover { color: var(--c-text); background: var(--c-surface); }
.nav__link.is-active { color: var(--c-text); }

.nav__cta { margin-left: 8px; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
  border-radius: var(--r-sm);
}
.nav__burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(10, 10, 12, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--c-border);
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--t) var(--ease-out), opacity var(--t) var(--ease);
}
.nav__mobile.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.nav__mobile-link {
  padding: 14px 8px;
  font-size: 18px;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
}
.nav__mobile-cta { margin-top: 16px; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero__bg { position: absolute; inset: 0; z-index: 0; }

.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--c-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  opacity: 0.6;
}

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbFloat 18s var(--ease) infinite alternate;
}
.hero__orb--1 {
  width: 520px; height: 520px;
  top: -10%; left: -10%;
  background: radial-gradient(circle at 30% 30%, #4f46e5, transparent 70%);
}
.hero__orb--2 {
  width: 600px; height: 600px;
  bottom: -20%; right: -10%;
  background: radial-gradient(circle at 70% 70%, #0ea5e9, transparent 70%);
  animation-delay: -6s;
}
@keyframes orbFloat {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.12); }
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.hero__eyebrow {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--c-text-dim);
  font-weight: 500;
  margin-bottom: 28px;
  text-transform: uppercase;
}
.hero__title {
  font-size: clamp(44px, 9vw, 96px);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin-bottom: 28px;
  background: linear-gradient(180deg, #ffffff 0%, #b8b8c0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: heroReveal 1.2s var(--ease-out) both;
}
.hero__desc {
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--c-text-mute);
  line-height: 1.6;
  margin-bottom: 40px;
  animation: heroReveal 1.2s var(--ease-out) 0.15s both;
}
.hero__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  animation: heroReveal 1.2s var(--ease-out) 0.3s both;
}
@keyframes heroReveal {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 2;
  color: var(--c-text-dim);
  animation: heroReveal 1.2s var(--ease-out) 0.6s both;
}
.hero__scroll-mouse {
  width: 26px; height: 42px;
  border: 1.5px solid var(--c-border-strong);
  border-radius: 14px;
  position: relative;
}
.hero__scroll-dot {
  position: absolute;
  top: 8px; left: 50%;
  width: 3px; height: 8px;
  margin-left: -1.5px;
  background: var(--c-text);
  border-radius: 2px;
  animation: scrollDot 1.8s var(--ease) infinite;
}
@keyframes scrollDot {
  0%   { opacity: 1; transform: translateY(0); }
  70%  { opacity: 0; transform: translateY(14px); }
  100% { opacity: 0; transform: translateY(0); }
}
.hero__scroll-text {
  font-size: 10px;
  letter-spacing: 0.3em;
  font-weight: 500;
}

/* ============================================================
   Section: Product Teaser
   ============================================================ */
.teaser {
  padding: 120px 0 120px;
  position: relative;
}

.teaser__track {
  display: flex;
  gap: 20px;
  padding: 0 24px 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin: 0 auto;
  max-width: var(--container-wide);
}
.teaser__track::-webkit-scrollbar { display: none; }

/* 桌面端鼠标拖拽(左/右滑动显示所有产品) */
@media (hover: hover) {
  .teaser__track { cursor: grab; }
}
.teaser__track.is-dragging {
  cursor: grabbing;
  user-select: none;
  -webkit-user-select: none;
  scroll-snap-type: none; /* 拖动时关闭 snap,释放后恢复 */
}

/* 卡片轨道视口 + 左右箭头按钮 */
.teaser__viewport {
  position: relative;
  max-width: var(--container-wide);
  margin: 0 auto;
}
.teaser__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  background: rgba(10, 10, 12, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--c-text);
  cursor: pointer;
  z-index: 3;
  transition: opacity var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.teaser__nav:hover:not(:disabled) {
  background: rgba(10, 10, 12, 0.8);
  border-color: var(--c-border-strong);
}
.teaser__nav:focus-visible {
  outline: 2px solid var(--c-text);
  outline-offset: 2px;
}
.teaser__nav:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}
.teaser__nav svg { width: 18px; height: 18px; }
.teaser__nav--prev { left: 8px; }
.teaser__nav--next { right: 8px; }

/* 触摸设备隐藏箭头(原生触摸滑动已足够) */
@media (hover: none) {
  .teaser__nav { display: none; }
}

.card {
  scroll-snap-align: center;
  flex: 0 0 auto;
  width: 280px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 28px 24px 24px;
  transition: transform var(--t) var(--ease-out),
    border-color var(--t) var(--ease), background var(--t) var(--ease),
    box-shadow var(--t) var(--ease);
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: relative;
}
.card--teaser:hover {
  transform: translateY(-6px);
  border-color: var(--c-border-strong);
  background: var(--c-bg-elev);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.8);
}

/* Device mockup */
.card__device {
  position: relative;
  aspect-ratio: 9 / 16;
  width: 100%;
  border-radius: 30px;
  background: linear-gradient(145deg, #1c1c20, #050507);
  border: 1px solid var(--c-border-strong);
  padding: 8px;
  overflow: hidden;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 14px 40px -16px rgba(0, 0, 0, 0.9);
}
.card__notch {
  position: absolute;
  top: 10px; left: 50%;
  transform: translateX(-50%);
  width: 90px; height: 22px;
  background: #000;
  border-radius: 14px;
  z-index: 2;
}
.card__screen {
  position: relative;
  width: 100%; height: 100%;
  border-radius: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  overflow: hidden;
}
.card__screen--gradient-a { background: linear-gradient(160deg, #4f46e5, #1e1b4b); }
.card__screen--gradient-b { background: linear-gradient(160deg, #059669, #022c22); }
.card__screen--gradient-c { background: linear-gradient(160deg, #2563eb, #0c1f3d); }
.card__screen--gradient-d { background: linear-gradient(160deg, #d97706, #2e1607); }
.card__screen--gradient-e { background: linear-gradient(160deg, #db2777, #3b0a25); }
.card__screen-num {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: -0.02em;
}
.card__screen-label {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.card__title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.card__tagline {
  font-size: 14px;
  color: var(--c-text-mute);
  margin-bottom: 12px;
  line-height: 1.5;
}

.teaser__cta {
  text-align: center;
  margin-top: 56px;
}

/* ============================================================
   Section: Brand Strength
   ============================================================ */
.strength {
  padding: 120px 24px;
  background: var(--c-bg-elev);
  border-block: 1px solid var(--c-border);
}

.strength__board {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 0 auto 64px;
  max-width: var(--container);
}
.strength__item {
  flex: 1 1 200px;
  min-width: 180px;
  padding: 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.strength__divider {
  width: 1px;
  background: var(--c-border);
  align-self: stretch;
  margin-block: 12px;
}
.strength__num {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 600;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, #fff, #8b8b94);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}
.strength__unit {
  font-size: 13px;
  color: var(--c-text-dim);
  letter-spacing: 0.05em;
}

.strength__stack {
  max-width: 640px;
  margin: 0 auto 64px;
  text-align: center;
}
.strength__stack-label {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  margin-bottom: 20px;
}
.strength__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.strength__chips li {
  padding: 8px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-full);
  font-size: 13px;
  color: var(--c-text-mute);
  font-family: var(--font-mono);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.strength__chips li:hover { border-color: var(--c-border-strong); color: var(--c-text); }

.strength__code {
  max-width: 640px;
  margin: 0 auto;
  background: #050507;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 28px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  position: relative;
}
.strength__code::before {
  content: "";
  position: absolute;
  top: 14px; left: 14px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: #2a2a2e;
  box-shadow: 18px 0 #2a2a2e, 36px 0 #2a2a2e;
}
.strength__code pre { padding-top: 24px; }
.strength__code .c { color: #6e6e73; }
.strength__code .k { color: #a78bfa; }
.strength__code .f { color: #93c5fd; }
.strength__code .t { color: #fbbf24; }
.strength__code .p { color: #6ee7b7; }
.strength__code .s { color: #f9a8d4; }

/* ============================================================
   Section: Subscribe
   ============================================================ */
.subscribe {
  position: relative;
  padding: 140px 24px;
  text-align: center;
  overflow: hidden;
}
.subscribe__glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.18), transparent 60%);
  filter: blur(60px);
  z-index: 0;
}
.subscribe__inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}
.subscribe__eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  margin-bottom: 18px;
}
.subscribe__title {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}
.subscribe__desc {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-text-mute);
  line-height: 1.6;
  margin-bottom: 36px;
}

.subscribe__form {
  display: flex;
  gap: 10px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-full);
  padding: 6px;
  transition: border-color var(--t-fast) var(--ease);
}
.subscribe__form:focus-within { border-color: var(--c-border-strong); }

.field { position: relative; flex: 1; }
.field__input {
  width: 100%;
  height: 48px;
  background: transparent;
  border: none;
  outline: none;
  padding: 0 20px;
  color: var(--c-text);
  font-size: 15px;
}
.field__label {
  position: absolute;
  top: 50%; left: 20px;
  transform: translateY(-50%);
  color: var(--c-text-dim);
  font-size: 15px;
  pointer-events: none;
  transition: transform var(--t-fast) var(--ease-out), font-size var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.field__input:focus + .field__label,
.field__input:not(:placeholder-shown) + .field__label {
  transform: translateY(-22px) scale(0.82);
  color: var(--c-text-mute);
}
.subscribe__submit { padding-inline: 24px; }

.subscribe__hint {
  margin-top: 18px;
  font-size: 13px;
  color: var(--c-text-dim);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--c-border);
  padding: 28px 24px;
  background: var(--c-bg);
}
.footer__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__left { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer__brand { font-weight: 600; font-size: 14px; }
.footer__copy { font-size: 13px; color: var(--c-text-dim); }
.footer__right { display: flex; gap: 18px; }
.footer__link {
  font-size: 13px;
  color: var(--c-text-dim);
  transition: color var(--t-fast) var(--ease);
}
.footer__link:hover { color: var(--c-text); }

/* ============================================================
   Reveal-on-scroll utility
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}
[data-reveal][data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal][data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal][data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal][data-reveal-delay="4"] { transition-delay: 0.32s; }

/* ============================================================
   Products page
   ============================================================ */
.page-hero {
  padding: calc(var(--nav-h) + 80px) 24px 60px;
  text-align: center;
}
.page-hero__eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  margin-bottom: 18px;
}
.page-hero__title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 600;
  letter-spacing: -0.04em;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #fff, #b8b8c0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero__desc {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-text-mute);
  max-width: 640px;
  margin: 0 auto;
}

.filter {
  display: flex;
  gap: 6px;
  justify-content: center;
  padding: 6px;
  margin: 0 auto 56px;
  max-width: max-content;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-full);
}
.filter__btn {
  padding: 8px 18px;
  font-size: 14px;
  color: var(--c-text-mute);
  border-radius: var(--r-full);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.filter__btn:hover { color: var(--c-text); }
.filter__btn.is-active {
  background: var(--c-accent);
  color: #000;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  max-width: var(--container-wide);
  margin: 0 auto 120px;
  padding: 0 24px;
}

.product {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 28px 24px;
  cursor: pointer;
  text-align: left;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: transform var(--t) var(--ease-out),
    border-color var(--t) var(--ease), background var(--t) var(--ease),
    box-shadow var(--t) var(--ease);
}
.product:hover {
  transform: translateY(-4px);
  border-color: var(--c-border-strong);
  background: var(--c-bg-elev);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.8);
}
.product__device-wrap {
  display: flex;
  justify-content: center;
  padding: 8px 0 12px;
}
.product__device {
  width: 160px;
}
.product__title { font-size: 20px; font-weight: 600; }
.product__tagline { font-size: 14px; color: var(--c-text-mute); margin-top: 4px; }
.product__features {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.product__feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--c-text-mute);
  line-height: 1.5;
}
.product__feature::before {
  content: "";
  flex: 0 0 6px;
  width: 6px; height: 6px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--c-text-dim);
}
.product__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}
.product__arrow {
  font-size: 18px;
  color: var(--c-text-dim);
  transition: transform var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease);
}
.product:hover .product__arrow { transform: translateX(4px); color: var(--c-text); }

/* Drawer / Modal */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
}
.drawer.is-open { pointer-events: auto; }
.drawer__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--t) var(--ease);
}
.drawer.is-open .drawer__overlay { opacity: 1; }

.drawer__panel {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  background: var(--c-bg-elev);
  border: 1px solid var(--c-border-strong);
  border-bottom: none;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  padding: 12px 28px 32px;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform var(--t-slow) var(--ease-out);
}
.drawer.is-open .drawer__panel { transform: translateY(0); }
.drawer__handle {
  width: 40px; height: 4px;
  background: var(--c-border-strong);
  border-radius: 2px;
  margin: 0 auto 24px;
}
.drawer__close {
  position: absolute;
  top: 16px; right: 16px;
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--c-surface);
  color: var(--c-text-mute);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.drawer__close:hover { background: var(--c-surface-strong); color: var(--c-text); }

.drawer__device {
  width: 180px;
  margin: 16px auto 24px;
}
.drawer__title {
  text-align: center;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.drawer__tagline {
  text-align: center;
  font-size: 15px;
  color: var(--c-text-mute);
  margin-bottom: 24px;
}
.drawer__features {
  margin-bottom: 28px;
}
.drawer__features-title {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}
.drawer__feature {
  padding: 12px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
  color: var(--c-text-mute);
  line-height: 1.6;
}
.drawer__feature strong { color: var(--c-text); font-weight: 500; }
.drawer__status {
  text-align: center;
  margin-bottom: 20px;
}
.drawer__notify {
  width: 100%;
  height: 50px;
}
.drawer__form { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.drawer__form .field__input { height: 50px; padding-left: 18px; }

/* ============================================================
   About page (magazine layout)
   ============================================================ */
.story {
  max-width: 920px;
  margin: 0 auto;
  padding: 80px 24px 0;
}
.story__eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  margin-bottom: 18px;
}
.story__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 28px;
  background: linear-gradient(180deg, #fff, #b8b8c0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.story__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  padding: 60px 0;
  border-top: 1px solid var(--c-border);
}
.story__row:first-of-type { border-top: none; }
.story__row--reverse .story__text { order: 2; }
.story__row--reverse .story__visual { order: 1; }

.story__label {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}
.story__heading {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  line-height: 1.2;
}
.story__body {
  font-size: 16px;
  color: var(--c-text-mute);
  line-height: 1.75;
}
.story__body p + p { margin-top: 16px; }

.story__visual {
  aspect-ratio: 4 / 5;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--c-bg-soft), #050507);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.story__visual--pattern::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, var(--c-border) 1px, transparent 1px);
  background-size: 18px 18px;
  mask-image: radial-gradient(ellipse at center, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000, transparent 80%);
}
.story__visual-icon {
  font-size: 64px;
  color: var(--c-text-dim);
  z-index: 1;
}

.principles {
  max-width: 920px;
  margin: 80px auto 0;
  padding: 0 24px;
}
.principles__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: 40px;
}
.principle {
  background: var(--c-bg);
  padding: 36px 28px;
  transition: background var(--t-fast) var(--ease);
}
.principle:hover { background: var(--c-bg-soft); }
.principle__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 18px;
}
.principle__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.principle__desc {
  font-size: 14px;
  color: var(--c-text-mute);
  line-height: 1.6;
}

/* Team */
.team {
  padding: 120px 24px;
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  margin-top: 120px;
}
.team__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  max-width: var(--container);
  margin: 56px auto 0;
}
.team__member {
  text-align: center;
}
.team__avatar {
  aspect-ratio: 1;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, #1c1c20, #050507);
  border: 1px solid var(--c-border);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 32px;
  color: var(--c-text-dim);
  position: relative;
  overflow: hidden;
}
.team__avatar::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--c-border) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.4;
}
.team__name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.team__role { font-size: 13px; color: var(--c-text-dim); }

/* ============================================================
   Contact page
   ============================================================ */
.contact {
  padding: calc(var(--nav-h) + 80px) 24px 120px;
  max-width: 640px;
  margin: 0 auto;
}
.contact__head { text-align: center; margin-bottom: 56px; }
.contact__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #fff, #b8b8c0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.contact__desc { color: var(--c-text-mute); font-size: 17px; }

.form {
  display: flex;
  flex-direction: column;
  gap: 24px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 36px 32px;
}
.form__field { position: relative; }
.form__field .field__label {
  top: 18px;
  transform: none;
  font-size: 15px;
}
.form__field .field__input,
.form__field .field__textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  color: var(--c-text);
  font-size: 15px;
  padding: 22px 18px 10px;
  outline: none;
  transition: border-color var(--t-fast) var(--ease);
}
.form__field .field__textarea { resize: vertical; min-height: 130px; font-family: inherit; }
.form__field .field__input:focus,
.form__field .field__textarea:focus { border-color: var(--c-border-strong); }
.form__field .field__input:focus + .field__label,
.form__field .field__input:not(:placeholder-shown) + .field__label,
.form__field .field__textarea:focus + .field__label,
.form__field .field__textarea:not(:placeholder-shown) + .field__label {
  transform: translateY(-12px) scale(0.78);
  color: var(--c-text-mute);
  top: 12px;
  left: 18px;
}
.form__submit { height: 50px; margin-top: 8px; }

.social {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 48px;
}
.social__link {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  color: var(--c-text-mute);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease-out);
}
.social__link:hover {
  color: var(--c-text);
  border-color: var(--c-border-strong);
  transform: translateY(-2px);
}
.social__link svg { width: 20px; height: 20px; }

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed;
  bottom: 32px; left: 50%;
  transform: translate(-50%, 120%);
  z-index: 300;
  padding: 14px 24px;
  background: var(--c-accent);
  color: #000;
  border-radius: var(--r-full);
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
  transition: transform var(--t) var(--ease-out);
}
.toast.is-visible { transform: translate(-50%, 0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__burger { display: flex; }

  .story__row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .story__row--reverse .story__text { order: 0; }
  .story__row--reverse .story__visual { order: 0; }
}

@media (max-width: 720px) {
  .hide-sm { display: none; }
  .hero { padding-top: 100px; }
  .teaser, .strength, .team, .contact { padding-inline: 16px; }
  .subscribe { padding-block: 100px; }

  .strength__board { gap: 0; }
  .strength__divider { display: none; }
  .strength__item {
    flex-basis: calc(50% - 1px);
    border: 1px solid var(--c-border);
    margin: -1px 0 0 -1px;
  }

  .subscribe__form { flex-direction: column; border-radius: var(--r-lg); padding: 16px; }
  .subscribe__submit { width: 100%; height: 48px; }

  .footer__inner { flex-direction: column; align-items: flex-start; }
  .footer__right { flex-wrap: wrap; }

  .grid { padding: 0 16px; }
  .form { padding: 24px 20px; }

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

  .drawer__panel { padding: 12px 20px 28px; border-radius: var(--r-xl) var(--r-xl) 0 0; }
}

@media (max-width: 480px) {
  .hero__actions .btn { width: 100%; }
  .teaser__track { padding-inline: 16px; }
  .card { width: 84vw; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .hero__orb { animation: none; }
  .hero__scroll-dot { animation: none; }
}