/* ============================================================
   心链 · 在么在么 — 品牌宣传站
   Design system: colors sampled from the real app icon
   (amber #FDA745 → coral #FF656E → magenta #E14797 → plum #AF38BA)
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  /* brand */
  --amber: #FDA745;
  --coral: #FF656E;
  --coral-lt: #FF9A7A;
  --magenta: #E14797;
  --plum: #AF38BA;
  --brand-grad: linear-gradient(120deg, #FDA745 0%, #FF656E 34%, #E14797 68%, #AF38BA 100%);
  --brand-grad-soft: linear-gradient(120deg, #FFB86B 0%, #FF7E86 38%, #EE6BA8 70%, #C258CE 100%);

  /* neutrals */
  --ink: #0C0A14;
  --ink-2: #14101F;
  --ink-3: #1D1729;
  --cream: #FFFAF6;
  --cream-2: #FFF4EC;
  --paper: #FFFFFF;
  --text: #16121C;
  --muted: #6E6675;
  --muted-2: #9A93A1;
  --hair: rgba(22, 18, 28, .09);
  --hair-2: rgba(22, 18, 28, .055);
  --hair-d: rgba(255, 255, 255, .12);

  /* product state */
  --calm: #5AA0FF;
  --calm-deep: #1F4FD8;
  --safe: #2BD3A4;
  --sos: #FF3B30;

  /* geometry */
  --maxw: 1180px;
  --gut: clamp(20px, 5vw, 40px);
  --sec-y: clamp(76px, 9.5vw, 140px);
  --r-xs: 10px;
  --r-sm: 14px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 36px;
  --r-2xl: 44px;
  --r-pill: 999px;

  /* elevation */
  --sh-1: 0 1px 2px rgba(22, 18, 28, .05), 0 4px 14px -6px rgba(22, 18, 28, .10);
  --sh-2: 0 2px 6px rgba(22, 18, 28, .05), 0 14px 40px -18px rgba(22, 18, 28, .20);
  --sh-3: 0 30px 70px -28px rgba(40, 12, 44, .34), 0 6px 18px -10px rgba(22, 18, 28, .16);
  --sh-brand: 0 10px 30px -10px rgba(225, 71, 151, .45);

  /* motion */
  --e-out: cubic-bezier(.16, 1, .3, 1);
  --e-io: cubic-bezier(.45, 0, .55, 1);

  /* type */
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  font-feature-settings: "kern" 1;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 3px;
  border-radius: 6px;
}
::selection { background: rgba(225, 71, 151, .18); }

/* ---------- 3. Layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}
.section { padding-block: var(--sec-y); position: relative; }
.section--tight { padding-block: clamp(52px, 6vw, 88px); }
.section--dark { background: var(--ink); color: #fff; }
.section--paper { background: var(--paper); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted-2);
}
.eyebrow::before {
  content: "";
  width: 18px; height: 1.5px;
  background: var(--brand-grad);
  border-radius: 2px;
}
.section--dark .eyebrow { color: rgba(255, 255, 255, .52); }

.h1 {
  font-size: clamp(38px, 6.4vw, 74px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.025em;
}
.h2 {
  font-size: clamp(29px, 4.3vw, 50px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.022em;
}
.h3 {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -.01em;
}
.lede {
  font-size: clamp(15.5px, 1.15vw, 17.5px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 54ch;
}
.section--dark .lede { color: rgba(255, 255, 255, .62); }

.grad-text {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sec-head { max-width: 640px; margin-bottom: clamp(40px, 5vw, 68px); }
.sec-head .h2 { margin-top: 18px; }
.sec-head .lede { margin-top: 18px; }
.sec-head--center { margin-inline: auto; text-align: center; }
.sec-head--center .lede { margin-inline: auto; }

/* ---------- 4. Buttons ---------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: #fff;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 26px;
  border-radius: var(--r-pill);
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--btn-fg);
  background: var(--btn-bg);
  white-space: nowrap;
  isolation: isolate;
  overflow: hidden;
  transition: transform .45s var(--e-out), box-shadow .45s var(--e-out);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.985); }
.btn__ic { flex: none; transition: transform .45s var(--e-out); }
.btn:hover .btn__ic { transform: translateX(3px); }

.btn--primary {
  background: var(--brand-grad);
  background-size: 180% 180%;
  background-position: 0% 50%;
  color: #fff;
  box-shadow: var(--sh-brand);
  transition: transform .45s var(--e-out), box-shadow .5s var(--e-out), background-position .7s var(--e-out);
}
.btn--primary:hover { background-position: 100% 50%; box-shadow: 0 16px 40px -12px rgba(225, 71, 151, .58); }

.btn--ghost {
  background: rgba(255, 255, 255, .06);
  color: #fff;
  box-shadow: inset 0 0 0 1px var(--hair-d);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .12); }

.btn--line {
  background: transparent;
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--hair);
}
.btn--line:hover { background: rgba(22, 18, 28, .04); box-shadow: inset 0 0 0 1px rgba(22, 18, 28, .18); }

.btn--lg { padding: 18px 32px; font-size: 16.5px; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 15px;
  font-weight: 600;
  color: var(--magenta);
}
.link-arrow svg { transition: transform .4s var(--e-out); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ---------- 5. Texture / ambience ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  opacity: .04;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2.5px;
  width: 0;
  z-index: 950;
  background: var(--brand-grad);
  transition: width .1s linear;
}

/* ---------- 6. Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 800;
  padding: 14px var(--gut);
  transition: padding .5s var(--e-out), background .5s var(--e-out), box-shadow .5s var(--e-out);
}
.nav__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 9px 10px 9px 16px;
  border-radius: var(--r-pill);
  transition: background .5s var(--e-out), box-shadow .5s var(--e-out), backdrop-filter .5s var(--e-out);
}
.nav.is-stuck { padding-top: 10px; padding-bottom: 10px; }
.nav.is-stuck .nav__inner {
  background: rgba(255, 250, 246, .82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  box-shadow: 0 1px 0 rgba(22, 18, 28, .05), 0 12px 34px -22px rgba(22, 18, 28, .3);
}
.nav__brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.nav__logo { width: 34px; height: 34px; border-radius: 10px; flex: none; box-shadow: 0 4px 12px -4px rgba(225, 71, 151, .5); }
.nav__name { display: flex; flex-direction: column; line-height: 1.1; }
.nav__name b { font-size: 16px; font-weight: 700; letter-spacing: .02em; color: #fff; transition: color .5s var(--e-out); }
.nav__name i { font-size: 10px; font-style: normal; letter-spacing: .22em; color: rgba(255, 255, 255, .55); transition: color .5s var(--e-out); }
.nav.is-stuck .nav__name b { color: var(--text); }
.nav.is-stuck .nav__name i { color: var(--muted-2); }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  padding: 9px 14px;
  border-radius: var(--r-pill);
  font-size: 14.5px;
  font-weight: 550;
  color: rgba(255, 255, 255, .74);
  transition: color .3s, background .3s;
}
.nav__links a:hover { color: #fff; background: rgba(255, 255, 255, .1); }
.nav.is-stuck .nav__links a { color: var(--muted); }
.nav.is-stuck .nav__links a:hover { color: var(--text); background: rgba(22, 18, 28, .055); }

.nav__cta { padding: 12px 20px; font-size: 14.5px; }
.nav__burger {
  display: none;
  width: 40px; height: 40px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 0 1px var(--hair-d);
}
.nav.is-stuck .nav__burger { box-shadow: inset 0 0 0 1px var(--hair); }
.nav__burger span { position: relative; display: block; width: 16px; height: 1.6px; border-radius: 2px; background: #fff; transition: background .4s; }
.nav__burger span::before, .nav__burger span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1.6px; border-radius: 2px; background: inherit;
  transition: transform .4s var(--e-out);
}
.nav__burger span::before { top: -5px; }
.nav__burger span::after { top: 5px; }
.nav.is-stuck .nav__burger span { background: var(--text); }

.sheet {
  position: fixed;
  inset: 0;
  z-index: 790;
  background: rgba(255, 250, 246, .97);
  backdrop-filter: blur(20px);
  padding: 96px var(--gut) 40px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .4s var(--e-out), transform .4s var(--e-out), visibility .4s;
}
.sheet.is-open { opacity: 1; visibility: visible; transform: none; }
.sheet a {
  padding: 18px 4px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -.01em;
  border-bottom: 1px solid var(--hair-2);
}
.sheet .btn { margin-top: 26px; }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding-top: clamp(120px, 15vw, 176px);
  padding-bottom: clamp(80px, 10vw, 132px);
  overflow: hidden;
  isolation: isolate;
}
.hero__bg { position: absolute; inset: 0; z-index: -1; }
.hero__bloom {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
}
.hero__bloom--a { width: 46vw; height: 46vw; max-width: 640px; max-height: 640px; top: -14%; right: -8%; background: radial-gradient(circle, rgba(225, 71, 151, .75), transparent 68%); }
.hero__bloom--b { width: 38vw; height: 38vw; max-width: 520px; max-height: 520px; bottom: -18%; left: -10%; background: radial-gradient(circle, rgba(31, 79, 216, .62), transparent 68%); }
.hero__bloom--c { width: 30vw; height: 30vw; max-width: 420px; max-height: 420px; top: 34%; left: 34%; background: radial-gradient(circle, rgba(253, 167, 69, .34), transparent 66%); }
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 34%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 34%, #000 20%, transparent 78%);
}
.hero__dust { position: absolute; inset: 0; }
.hero__dust i {
  position: absolute;
  width: var(--s, 2px); height: var(--s, 2px);
  border-radius: 50%;
  background: #fff;
  opacity: 0;
  animation: twinkle var(--dur, 5s) var(--e-io) infinite;
  animation-delay: var(--del, 0s);
}
@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(.6); }
  50% { opacity: var(--o, .7); transform: scale(1); }
}
.hero__inner {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(40px, 5vw, 72px);
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 15px 8px 10px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .07);
  box-shadow: inset 0 0 0 1px var(--hair-d);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .8);
  backdrop-filter: blur(8px);
}
.hero__eyebrow em {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand-grad);
  font-style: normal;
  font-size: 11px;
}
.hero h1 { margin-top: 26px; }
.hero h1 span { display: block; }
.hero__sub {
  margin-top: 24px;
  font-size: clamp(15.5px, 1.2vw, 17.5px);
  line-height: 1.85;
  color: rgba(255, 255, 255, .64);
  max-width: 46ch;
}
.hero__cta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 13px; }
.hero__note {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}
.hero__trust {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--hair-d);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
}
.hero__trust li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .58);
}
.hero__trust svg { flex: none; color: var(--safe); }

/* ---------- 8. Orb ---------- */
.hero__visual {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin-inline: auto;
}
.orb-stage {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  width: 100%;
  max-width: 460px;
  margin-inline: auto;
}
.orb-stage__ring {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 46%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(120, 175, 255, .5);
  animation: ringOut 5.2s var(--e-io) infinite;
  animation-delay: var(--rd, 0s);
}
@keyframes ringOut {
  0% { transform: scale(1); opacity: 0; }
  18% { opacity: .55; }
  100% { transform: scale(2.35); opacity: 0; }
}
.orb-halo {
  position: absolute;
  width: 78%; aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(90, 160, 255, .30), rgba(31, 79, 216, .10) 52%, transparent 72%);
  filter: blur(26px);
  animation: halo 5.2s var(--e-io) infinite;
}
@keyframes halo {
  0%, 100% { transform: scale(1); opacity: .78; }
  50% { transform: scale(1.14); opacity: 1; }
}
.orb {
  position: relative;
  width: 46%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 38% 30%, #B9DBFF 0%, #6BA8FF 22%, #2E6FE8 52%, #12358F 78%, #071B4E 100%);
  box-shadow:
    0 0 44px 6px rgba(90, 160, 255, .42),
    0 0 130px 34px rgba(60, 120, 235, .24),
    inset -14px -22px 48px rgba(2, 10, 40, .6),
    inset 12px 16px 40px rgba(255, 255, 255, .16);
  animation: breathe 5.2s var(--e-io) infinite;
}
@keyframes breathe {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.072); filter: brightness(1.14); }
}
.orb__spec {
  position: absolute;
  top: 13%; left: 17%;
  width: 32%; height: 22%;
  border-radius: 50%;
  background: radial-gradient(ellipse at 40% 40%, rgba(255, 255, 255, .82), rgba(255, 255, 255, 0) 68%);
  filter: blur(5px);
}
.orb__rim {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .17);
}
.orb-shadow {
  position: absolute;
  bottom: 10%;
  width: 34%;
  height: 5%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(90, 160, 255, .38), transparent 70%);
  filter: blur(12px);
  animation: shadowPulse 5.2s var(--e-io) infinite;
}
@keyframes shadowPulse {
  0%, 100% { transform: scale(1); opacity: .5; }
  50% { transform: scale(1.16); opacity: .78; }
}
.orb-label {
  position: absolute;
  left: 50%;
  bottom: 3%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .07);
  box-shadow: inset 0 0 0 1px var(--hair-d);
  backdrop-filter: blur(10px);
  font-size: 13.5px;
  font-weight: 550;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .86);
  white-space: nowrap;
}
.orb-label b { font-weight: 550; }
.orb-label__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--calm);
  box-shadow: 0 0 0 4px rgba(90, 160, 255, .18);
  animation: dotPulse 2.6s var(--e-io) infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(90, 160, 255, .16); }
  50% { box-shadow: 0 0 0 7px rgba(90, 160, 255, .04); }
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .1);
  box-shadow: inset 0 0 0 1px var(--hair-d), 0 20px 44px -20px rgba(0, 0, 0, .6);
  backdrop-filter: blur(16px) saturate(160%);
  font-size: 13px;
  color: rgba(255, 255, 255, .9);
  white-space: nowrap;
  animation: floaty 7.5s var(--e-io) infinite;
}
.float-card b { display: block; font-size: 13.5px; font-weight: 600; }
.float-card small { display: block; font-size: 11.5px; color: rgba(255, 255, 255, .55); }
.float-card--a { top: 12%; left: -4%; animation-delay: -.8s; }
.float-card--b { bottom: 16%; right: -6%; animation-delay: -3.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
.float-card__ic {
  display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: 10px; flex: none;
}
.float-card__ic--heart { background: rgba(255, 101, 110, .2); color: #FF9BA1; }
.float-card__ic--sos { background: rgba(255, 59, 48, .2); color: #FF8577; }

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: grid;
  place-items: center;
  gap: 7px;
  font-size: 10.5px;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .3);
  text-transform: uppercase;
}
.hero__scroll i {
  display: block;
  width: 1px; height: 26px;
  background: linear-gradient(rgba(255, 255, 255, .5), transparent);
  animation: scrollHint 2.4s var(--e-io) infinite;
}
@keyframes scrollHint {
  0%, 100% { opacity: .3; transform: scaleY(.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ---------- 9. Trust strip ---------- */
.strip { background: var(--cream); border-bottom: 1px solid var(--hair-2); }
.strip__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hair-2);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.strip__item {
  background: var(--cream);
  padding: clamp(24px, 3vw, 34px) clamp(18px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.strip__item svg { color: var(--magenta); }
.strip__item dt { font-size: 15.5px; font-weight: 650; letter-spacing: -.005em; }
.strip__item dd { font-size: 13.5px; line-height: 1.65; color: var(--muted); }

/* ---------- 10. Bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: clamp(14px, 1.6vw, 20px);
}
.card {
  position: relative;
  border-radius: var(--r-lg);
  padding: clamp(24px, 2.8vw, 34px);
  background: var(--paper);
  box-shadow: var(--sh-1);
  overflow: hidden;
  transition: transform .6s var(--e-out), box-shadow .6s var(--e-out);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.card__ic {
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border-radius: 14px;
  margin-bottom: 20px;
  color: #fff;
  background: var(--brand-grad);
  box-shadow: 0 8px 22px -10px rgba(225, 71, 151, .55);
}
.card h3 { font-size: clamp(17px, 1.7vw, 20px); font-weight: 650; letter-spacing: -.012em; }
.card p { margin-top: 11px; font-size: 14.5px; line-height: 1.75; color: var(--muted); }
.card--hero { background: var(--ink); color: #fff; }
.card--hero p { color: rgba(255, 255, 255, .62); }
.card--hero .card__ic { background: rgba(255, 255, 255, .1); box-shadow: none; color: #8FBEFF; }
/* 文字与呼吸球分区，避免图压字 */
.card--hero > .card__ic,
.card--hero > h3,
.card--hero > p { position: relative; z-index: 2; max-width: 54%; }
.card--sos .card__ic { background: linear-gradient(140deg, #FF7A5C, #E8332B); }

.card--span4 { grid-column: span 4; }
.card--span3 { grid-column: span 3; }
.card--span2 { grid-column: span 2; }
.card--span6 { grid-column: span 6; }

.card__orbwrap {
  position: absolute;
  right: -6%;
  top: 50%;
  transform: translateY(-50%);
  width: 46%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.card--hero .orb { width: 62%; }
.card--hero .orb-halo { width: 96%; }

.card--media { padding-bottom: 0; display: flex; flex-direction: column; }
.card--media .shot {
  margin-top: 22px;
  flex: none;
  aspect-ratio: 1 / 1;
  border-radius: 18px 18px 0 0;
  overflow: hidden;
  position: relative;
  background: #08080C;
}
.card--media .shot img { width: 100%; height: 100%; object-fit: cover; object-position: center 62%; }

.tap3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
}
.tap3 i {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255, 59, 48, .12);
  box-shadow: inset 0 0 0 1px rgba(255, 59, 48, .3);
  display: grid; place-items: center;
  color: #E8332B;
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
}
.card--sos .tap3 i { animation: tapFlash 2.7s var(--e-io) infinite; }
.card--sos .tap3 i:nth-child(2) { animation-delay: .18s; }
.card--sos .tap3 i:nth-child(3) { animation-delay: .36s; }
@keyframes tapFlash {
  0%, 84%, 100% { background: rgba(255, 59, 48, .1); box-shadow: inset 0 0 0 1px rgba(255, 59, 48, .26); color: #E8332B; transform: scale(1); }
  88% { background: #E8332B; color: #fff; transform: scale(1.14); box-shadow: 0 0 0 8px rgba(232, 51, 43, 0); }
  94% { box-shadow: 0 0 0 0 rgba(232, 51, 43, .3); }
}
.wave {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 30px;
  margin-top: 20px;
}
.wave i {
  width: 3px;
  border-radius: 2px;
  background: var(--brand-grad);
  animation: waveBar 1.25s var(--e-io) infinite;
}
@keyframes waveBar {
  0%, 100% { height: 22%; opacity: .5; }
  50% { height: 100%; opacity: 1; }
}
.chain-link {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 22px;
}
.chain-link i {
  width: 13px; height: 22px;
  border-radius: 7px;
  border: 2px solid rgba(225, 71, 151, .5);
  margin-right: -6px;
}
.chain-link i:nth-child(even) { border-color: rgba(175, 56, 186, .5); transform: rotate(90deg); }

/* ---------- 11. Apps (two columns) ---------- */
.apps { background: var(--paper); }
.apps__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 2.6vw, 32px);
}
.app-panel {
  position: relative;
  border-radius: var(--r-xl);
  padding: clamp(28px, 3.4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  overflow: hidden;
}
.app-panel--dark { background: var(--ink); color: #fff; }
.app-panel--light { background: var(--cream-2); box-shadow: inset 0 0 0 1px rgba(225, 71, 151, .1); }
.app-panel__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.app-panel--dark .app-panel__tag { color: rgba(255, 255, 255, .5); }
.app-panel--light .app-panel__tag { color: var(--magenta); }
.app-panel h3 { margin-top: 14px; font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; letter-spacing: -.02em; }
.app-panel > div > p { margin-top: 13px; font-size: 14.5px; line-height: 1.78; }
.app-panel--dark > div > p { color: rgba(255, 255, 255, .6); }
.app-panel--light > div > p { color: var(--muted); }
.feat-list { margin-top: 26px; display: grid; gap: 13px; }
.feat-list li { display: flex; gap: 11px; font-size: 14.5px; line-height: 1.6; }
.feat-list li svg { flex: none; margin-top: 3px; }
.app-panel--dark .feat-list svg { color: var(--safe); }
.app-panel--light .feat-list svg { color: var(--magenta); }
.app-panel--dark .feat-list b, .app-panel--light .feat-list b { font-weight: 650; }
.app-panel--dark .feat-list span { color: rgba(255, 255, 255, .58); }

.phone-wrap { display: grid; place-items: center; padding-top: 6px; }
.phone {
  position: relative;
  width: 100%;
  max-width: 268px;
  aspect-ratio: 780 / 1688;
  border-radius: 42px;
  padding: 10px;
  background: linear-gradient(158deg, #3A3245 0%, #100C18 42%, #2A2334 100%);
  box-shadow: 0 40px 80px -34px rgba(20, 6, 30, .62), inset 0 0 0 1px rgba(255, 255, 255, .09);
}
.phone--light { background: linear-gradient(158deg, #FBF7F3 0%, #DED5DA 46%, #F3ECE8 100%); box-shadow: 0 40px 80px -34px rgba(60, 30, 40, .3), inset 0 0 0 1px rgba(255, 255, 255, .7); }
.phone__screen {
  position: relative;
  width: 100%; height: 100%;
  border-radius: 33px;
  overflow: hidden;
  background: #07070B;
}
.phone__screen img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.phone__island {
  position: absolute;
  top: 8px; left: 50%;
  transform: translateX(-50%);
  width: 74px; height: 19px;
  border-radius: var(--r-pill);
  background: #05050A;
  z-index: 3;
}
.phone--family { max-width: 252px; aspect-ratio: 430 / 752; border-radius: 38px; }
.phone--family .phone__screen { border-radius: 30px; }
/* 子女端截图自带顶部标题栏，避开挖孔以免遮挡品牌 */
.phone--family .phone__island { display: none; }

.app-panel__shot-extra {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  justify-content: center;
}
.app-panel__shot-extra img {
  width: 76px;
  border-radius: 14px;
  box-shadow: var(--sh-2);
  opacity: .95;
}

/* ---------- 12. Reductions band ---------- */
.band { background: linear-gradient(180deg, var(--cream-2), var(--cream)); }
.band__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(16px, 2vw, 24px); }
.band__item {
  padding: clamp(24px, 3vw, 32px);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .72);
  box-shadow: inset 0 0 0 1px rgba(225, 71, 151, .09);
  backdrop-filter: blur(6px);
}
.band__num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.band__item h3 { margin-top: 14px; font-size: 17.5px; font-weight: 650; letter-spacing: -.01em; }
.band__item p { margin-top: 10px; font-size: 14px; line-height: 1.72; color: var(--muted); }

/* ---------- 13. Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 40px); position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 2.5%;
  right: 29.5%;
  height: 2px;
  background-image: linear-gradient(90deg, rgba(225, 71, 151, .45) 0 6px, transparent 6px 14px);
  background-size: 14px 2px;
  background-repeat: repeat-x;
}
.step { position: relative; }
.step__num {
  position: relative;
  z-index: 1;
  width: 54px; height: 54px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  background: var(--brand-grad);
  box-shadow: 0 10px 26px -10px rgba(225, 71, 151, .6), 0 0 0 7px var(--cream);
}
.step h3 { margin-top: 22px; font-size: 19px; font-weight: 650; letter-spacing: -.012em; }
.step p { margin-top: 11px; font-size: 14.5px; line-height: 1.75; color: var(--muted); }
.step__meta {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: var(--r-pill);
  background: rgba(22, 18, 28, .045);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
}

/* ---------- 14. Download ---------- */
.dl { position: relative; overflow: hidden; }
.dl__bloom {
  position: absolute;
  top: -22%; left: 50%;
  transform: translateX(-50%);
  width: 92vw; max-width: 1080px;
  aspect-ratio: 2.1;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(225, 71, 151, .34), transparent 66%);
  filter: blur(80px);
  pointer-events: none;
}
.dl__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(18px, 2.4vw, 28px); position: relative; }
.dl-card {
  border-radius: var(--r-xl);
  padding: clamp(26px, 3vw, 38px);
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 0 0 1px var(--hair-d);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  transition: background .5s var(--e-out), transform .6s var(--e-out), box-shadow .6s var(--e-out);
}
.dl-card:hover {
  background: rgba(255, 255, 255, .075);
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .18), 0 30px 60px -30px rgba(0, 0, 0, .7);
}
.dl-card__top { display: flex; align-items: center; gap: 16px; }
.dl-card__icon {
  width: 62px; height: 62px;
  border-radius: 17px;
  flex: none;
  box-shadow: 0 12px 26px -12px rgba(0, 0, 0, .7);
}
.dl-card__id b { display: block; font-size: 18.5px; font-weight: 680; letter-spacing: -.012em; }
.dl-card__id span { display: block; margin-top: 4px; font-size: 12.5px; color: rgba(255, 255, 255, .48); letter-spacing: .04em; }
.dl-card__desc { margin-top: 22px; font-size: 14.5px; line-height: 1.78; color: rgba(255, 255, 255, .62); }
.dl-card__facts {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.dl-card__facts span {
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .07);
  font-size: 12px;
  color: rgba(255, 255, 255, .66);
  font-variant-numeric: tabular-nums;
}
.dl-card__actions { margin-top: 26px; display: grid; gap: 11px; }
.dl-card__qr {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--hair-d);
  display: flex;
  align-items: center;
  gap: 18px;
}
.dl-card__qrbox {
  width: 96px; height: 96px;
  border-radius: 14px;
  background: #fff;
  padding: 9px;
  flex: none;
}
.dl-card__qrbox svg,
.dl-card__qrbox img { width: 100%; height: 100%; }
.dl-card__qrcopy { font-size: 13px; line-height: 1.7; color: rgba(255, 255, 255, .6); }
.dl-card__qrcopy b { display: block; color: #fff; font-size: 14px; font-weight: 620; margin-bottom: 3px; }
.dl__hint {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  justify-content: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}
.dl__hint span { display: flex; align-items: center; gap: 7px; }

/* ---------- 15. FAQ ---------- */
.faq__list { border-top: 1px solid var(--hair-2); }
.faq__item { border-bottom: 1px solid var(--hair-2); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: clamp(20px, 2.4vw, 28px) 0;
  text-align: left;
  font-size: clamp(15.5px, 1.4vw, 18px);
  font-weight: 620;
  letter-spacing: -.008em;
  transition: color .3s;
}
.faq__q:hover { color: var(--magenta); }
.faq__q i {
  flex: none;
  position: relative;
  width: 30px; height: 30px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--hair);
  transition: background .4s var(--e-out), box-shadow .4s var(--e-out);
}
.faq__q i::before, .faq__q i::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 11px; height: 1.6px;
  border-radius: 2px;
  background: var(--text);
  transform: translate(-50%, -50%);
  transition: transform .45s var(--e-out), background .4s;
}
.faq__q i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq__item.is-open .faq__q i { background: var(--brand-grad); box-shadow: none; }
.faq__item.is-open .faq__q i::before { background: #fff; transform: translate(-50%, -50%) rotate(180deg); }
.faq__item.is-open .faq__q i::after { background: #fff; transform: translate(-50%, -50%) rotate(180deg); }
.faq__a {
  overflow: hidden;
  height: 0;
  transition: height .5s var(--e-out);
}
.faq__a p {
  padding-bottom: clamp(20px, 2.4vw, 28px);
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 16. Footer ---------- */
.foot { background: var(--ink); color: rgba(255, 255, 255, .6); padding-block: clamp(52px, 6vw, 76px) 40px; }
.foot__top {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--hair-d);
}
.foot__brand { display: flex; align-items: center; gap: 13px; }
.foot__brand img { width: 42px; height: 42px; border-radius: 12px; }
.foot__brand b { display: block; font-size: 17px; font-weight: 700; color: #fff; letter-spacing: .02em; }
.foot__brand span { display: block; font-size: 12.5px; color: rgba(255, 255, 255, .44); margin-top: 2px; }
.foot__tagline { max-width: 34ch; font-size: 14px; line-height: 1.8; margin-top: 20px; }
.foot__cols { display: flex; flex-wrap: wrap; gap: clamp(32px, 5vw, 72px); }
.foot__col h4 { font-size: 12.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: rgba(255, 255, 255, .38); margin-bottom: 16px; }
.foot__col a, .foot__col span { display: block; font-size: 14px; padding: 5px 0; color: rgba(255, 255, 255, .62); transition: color .3s; }
.foot__col a:hover { color: #fff; }
.foot__bottom {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .36);
}

/* ---------- 17. Reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity .85s var(--e-out), transform .85s var(--e-out);
  transition-delay: var(--d, 0s);
}

/* ---------- 18. Responsive ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 56px; }
  .hero__copy { max-width: 640px; }
  .orb-stage { max-width: 380px; }
  .float-card--a { left: 0; }
  .float-card--b { right: 0; }
  .apps__grid { grid-template-columns: 1fr; }
  .card--span4, .card--span3, .card--span2 { grid-column: span 3; }
  .card--hero { grid-column: span 6; }
}
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .strip__inner { grid-template-columns: repeat(2, 1fr); }
  .band__grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 34px; }
  .steps::before { left: 27px; right: auto; top: 27px; bottom: 27px; width: 2px; height: auto;
    background-image: linear-gradient(180deg, rgba(225, 71, 151, .45) 0 6px, transparent 6px 14px);
    background-size: 2px 14px; background-repeat: repeat-y; }
  .dl__grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  html { scroll-padding-top: 84px; }
  .bento { grid-template-columns: 1fr; }
  .card--span4, .card--span3, .card--span2, .card--hero { grid-column: span 1; }
  .card__orbwrap { position: relative; right: auto; top: auto; transform: none; width: 58%; margin: 26px auto 0; }
  .card--hero > .card__ic,
  .card--hero > h3,
  .card--hero > p { max-width: 100%; }
  .hero { padding-top: 112px; }
  .hero__trust { gap: 10px 18px; }
  .float-card { font-size: 12px; padding: 10px 13px; }
  .float-card--a { top: 4%; }
  .float-card--b { bottom: 6%; }
  .orb-stage { max-width: 300px; }
  .hero__scroll { display: none; }
  .strip__inner { grid-template-columns: 1fr; }
  .band__grid { grid-template-columns: 1fr; }
  .dl-card__qr { flex-direction: column; align-items: flex-start; }
  .foot__top { flex-direction: column; }
}
@media (max-width: 420px) {
  .float-card--a { left: -2%; }
  .float-card--b { right: -2%; }
  .btn { padding: 14px 20px; font-size: 14.5px; }
  .btn--lg { padding: 16px 24px; font-size: 15.5px; }
  .hero__cta .btn { width: 100%; }
}

/* ---------- 19. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 20. Print ---------- */
@media print {
  .nav, .grain, .progress, .hero__scroll, .dl__bloom { display: none; }
}