@charset "UTF-8";

:root {
  --paper: #f6f0e6;
  --paper-deep: #eee4d5;
  --paper-light: #fcf9f3;
  --card: #fffdf8;
  --ink: #292621;
  --ink-soft: #6f685f;
  --ink-faint: #9f968a;
  --line: #ded3c4;
  --green-900: #143d33;
  --green-800: #245548;
  --green-700: #2f6b5c;
  --green-500: #4c9a86;
  --green-300: #9cc8ba;
  --green-100: #dcede7;
  --green-50: #edf5f1;
  --amber-700: #8a5a1f;
  --amber-500: #c9853c;
  --amber-300: #e7b37a;
  --amber-100: #f7ecdc;
  --rose: #c0492c;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 12px 36px rgba(46, 52, 44, 0.08);
  --shadow-lg: 0 32px 80px rgba(36, 70, 57, 0.16);
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 38px;
  --container: 1200px;
  --header-height: 78px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

::selection {
  background: var(--green-300);
  color: var(--green-900);
}

:focus-visible {
  outline: 3px solid var(--amber-500);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 100px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--green-700);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
}

.section-heading {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.section-heading em {
  color: var(--green-700);
  font-style: normal;
}

.section-intro {
  max-width: 640px;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header[data-scrolled] {
  border-bottom-color: rgba(58, 51, 43, 0.09);
  background: rgba(246, 240, 230, 0.9);
  box-shadow: 0 8px 28px rgba(69, 58, 47, 0.05);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  display: flex;
  width: min(calc(100% - 48px), 1320px);
  height: 100%;
  align-items: center;
  justify-content: space-between;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--green-900);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 9px 14px;
  border-radius: 100px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.62);
  color: var(--green-800);
}

.site-nav .site-nav__cta {
  margin-left: 8px;
  padding-inline: 19px;
  background: var(--green-700);
  color: #fff;
}

.site-nav .site-nav__cta:hover {
  background: var(--green-900);
  color: #fff;
}

.menu-button {
  position: relative;
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
  color: var(--green-900);
  cursor: pointer;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  position: absolute;
  top: 21px;
  left: 12px;
  display: block;
  width: 20px;
  height: 2px;
  margin: 0;
  border-radius: 2px;
  background: currentColor;
  content: "";
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-button::before {
  transform: translateY(-6px);
}

.menu-button::after {
  transform: translateY(6px);
}

.menu-button[aria-expanded="true"] span {
  opacity: 0;
}

.menu-button[aria-expanded="true"]::before {
  transform: rotate(45deg);
}

.menu-button[aria-expanded="true"]::after {
  transform: rotate(-45deg);
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  background: var(--green-700);
  box-shadow: 0 14px 30px rgba(47, 107, 92, 0.2);
  color: #fff;
}

.button--primary:hover {
  background: var(--green-900);
  box-shadow: 0 18px 38px rgba(47, 107, 92, 0.26);
}

.button--soft {
  border-color: rgba(47, 107, 92, 0.2);
  background: rgba(255, 255, 255, 0.48);
  color: var(--green-800);
}

.button--soft:hover {
  border-color: var(--green-500);
  background: var(--card);
}

.button__arrow {
  transition: transform 180ms ease;
}

.button:hover .button__arrow {
  transform: translateX(4px);
}

.hero {
  position: relative;
  display: flex;
  min-height: 860px;
  align-items: center;
  overflow: hidden;
  padding: calc(var(--header-height) + 74px) 0 96px;
}

.hero::before {
  position: absolute;
  top: -270px;
  right: -180px;
  width: 720px;
  height: 720px;
  border: 1px solid rgba(47, 107, 92, 0.11);
  border-radius: 50%;
  box-shadow: 0 0 0 110px rgba(255, 255, 255, 0.1), 0 0 0 220px rgba(47, 107, 92, 0.035);
  content: "";
}

.hero::after {
  position: absolute;
  bottom: 18px;
  left: -42px;
  width: 310px;
  height: 310px;
  border-radius: 45% 55% 63% 37% / 53% 45% 55% 47%;
  background: rgba(201, 133, 60, 0.08);
  content: "";
  transform: rotate(19deg);
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(520px, 1.16fr);
  gap: 72px;
  align-items: center;
}

.hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding: 7px 12px 7px 8px;
  border: 1px solid rgba(47, 107, 92, 0.14);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--green-800);
  font-size: 13px;
  font-weight: 700;
}

.hero__kicker-dot {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  background: var(--green-100);
}

.hero__kicker-dot::after {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 5px rgba(76, 154, 134, 0.12);
  content: "";
}

.hero h1 {
  max-width: 670px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(52px, 6.3vw, 88px);
  font-weight: 700;
  letter-spacing: -0.065em;
  line-height: 1.03;
}

.hero h1 em {
  position: relative;
  color: var(--green-700);
  font-style: normal;
  white-space: nowrap;
}

.hero h1 em::after {
  position: absolute;
  right: 2%;
  bottom: 1px;
  left: 1%;
  height: 9px;
  border-radius: 50%;
  background: var(--amber-300);
  content: "";
  opacity: 0.42;
  transform: rotate(-1.5deg);
  z-index: -1;
}

.hero__lead {
  max-width: 580px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 19px;
  line-height: 1.85;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero__promises {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin: 38px 0 0;
  padding: 0;
  color: var(--ink-soft);
  font-size: 13px;
  list-style: none;
}

.hero__promises li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero__promises li::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-500);
  content: "";
}

.hero__visual {
  position: relative;
  min-height: 620px;
}

.home-window {
  position: absolute;
  top: 26px;
  right: 0;
  width: min(100%, 650px);
  padding: 14px;
  border: 1px solid rgba(47, 107, 92, 0.14);
  border-radius: 46px 46px 120px 46px;
  background: rgba(255, 253, 248, 0.68);
  box-shadow: var(--shadow-lg);
  transform: rotate(1.2deg);
}

.home-window::before {
  position: absolute;
  top: 22px;
  left: 28px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rose);
  box-shadow: 16px 0 0 var(--amber-500), 32px 0 0 var(--green-500);
  content: "";
  z-index: 2;
}

.home-window__scene {
  width: 100%;
  border-radius: 34px 34px 104px 34px;
}

.status-card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 13px;
  min-width: 220px;
  padding: 15px 17px;
  border: 1px solid rgba(47, 107, 92, 0.1);
  border-radius: 20px;
  background: rgba(255, 253, 248, 0.94);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.status-card--top {
  top: 2px;
  right: 38px;
  animation: float-card 5s ease-in-out infinite;
}

.status-card--bottom {
  right: 24px;
  bottom: 36px;
  animation: float-card 5.8s 0.8s ease-in-out infinite;
}

.status-card--left {
  bottom: 106px;
  left: -36px;
  min-width: 198px;
  animation: float-card 6.2s 0.2s ease-in-out infinite reverse;
}

.status-card__icon {
  display: grid;
  width: 42px;
  height: 42px;
  flex: none;
  place-items: center;
  border-radius: 14px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 20px;
}

.status-card__icon--amber {
  background: var(--amber-100);
  color: var(--amber-700);
}

.status-card__label {
  color: var(--ink-faint);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.status-card__value {
  margin-top: 1px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

.status-card__online {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 5px rgba(76, 154, 134, 0.12);
}

.hero__caption {
  position: absolute;
  right: 74px;
  bottom: 2px;
  margin: 0;
  color: var(--ink-faint);
  font-family: var(--serif);
  font-size: 13px;
  font-style: italic;
}

@keyframes float-card {
  0%, 100% { transform: translateY(0) rotate(-0.5deg); }
  50% { transform: translateY(-10px) rotate(0.5deg); }
}

.signal-section {
  position: relative;
  padding: 132px 0;
  background: var(--paper-light);
  overflow: hidden;
}

.signal-section::before {
  position: absolute;
  top: -100px;
  left: 50%;
  width: 760px;
  height: 240px;
  border: 1px solid rgba(201, 133, 60, 0.12);
  border-radius: 50%;
  content: "";
  transform: translateX(-50%);
}

.signal-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.84fr) minmax(0, 1.16fr);
  gap: 104px;
  align-items: center;
}

.signal-copy {
  position: sticky;
  top: 130px;
}

.signal-copy .section-heading {
  font-size: clamp(42px, 5vw, 66px);
}

.signal-copy__note {
  display: flex;
  gap: 15px;
  max-width: 480px;
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.signal-copy__note strong {
  color: var(--green-700);
  white-space: nowrap;
}

.day-card {
  position: relative;
  padding: 36px;
  border: 1px solid rgba(86, 76, 64, 0.1);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.day-card__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid #ece5da;
}

.day-card__date {
  color: var(--ink-faint);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.day-card__title {
  margin: 5px 0 0;
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.3;
}

.day-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border-radius: 100px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.day-card__badge::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-500);
  content: "";
}

.timeline {
  margin: 0;
  padding: 30px 0 0;
  list-style: none;
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 68px 26px 1fr;
  min-height: 104px;
}

.timeline__time {
  padding-top: 2px;
  color: var(--ink-faint);
  font-family: var(--serif);
  font-size: 13px;
}

.timeline__rail {
  position: relative;
}

.timeline__rail::before {
  position: absolute;
  top: 8px;
  bottom: -8px;
  left: 7px;
  width: 1px;
  background: var(--line);
  content: "";
}

.timeline__item:last-child .timeline__rail::before {
  display: none;
}

.timeline__dot {
  position: relative;
  z-index: 1;
  display: block;
  width: 15px;
  height: 15px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 1px var(--green-300);
}

.timeline__dot--amber {
  background: var(--amber-500);
  box-shadow: 0 0 0 1px var(--amber-300);
}

.timeline__dot--muted {
  background: #a99f94;
  box-shadow: 0 0 0 1px #cec5ba;
}

.timeline__content strong {
  display: block;
  font-size: 16px;
}

.timeline__content span {
  display: block;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 13px;
}

.day-card__privacy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 4px;
  padding: 17px 19px;
  border-radius: 16px;
  background: var(--paper-light);
  color: var(--ink-soft);
  font-size: 12px;
}

.day-card__privacy strong {
  color: var(--green-700);
}

.features {
  padding: 138px 0 150px;
}

.features__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 62px;
}

.features__head .section-intro {
  max-width: 420px;
  margin: 0 0 5px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.feature-card {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  padding: 32px;
  border: 1px solid rgba(74, 64, 53, 0.09);
  border-radius: 30px;
  background: var(--card);
  box-shadow: 0 12px 34px rgba(49, 54, 47, 0.055);
  transition: transform 260ms cubic-bezier(.2,.8,.2,1), box-shadow 260ms ease;
}

.feature-card:hover {
  box-shadow: 0 24px 58px rgba(49, 75, 62, 0.1);
  transform: translateY(-6px);
}

.feature-card--wide {
  grid-column: span 7;
  min-height: 390px;
  background: var(--green-700);
  color: #fff;
}

.feature-card--service {
  grid-column: span 5;
  min-height: 390px;
  background: #ead9c1;
}

.feature-card--family,
.feature-card--reminder,
.feature-card--drill {
  grid-column: span 4;
}

.feature-card__index {
  color: var(--ink-faint);
  font-family: var(--serif);
  font-size: 13px;
}

.feature-card--wide .feature-card__index {
  color: rgba(255, 255, 255, 0.58);
}

.feature-card h3 {
  max-width: 390px;
  margin: 23px 0 0;
  font-family: var(--serif);
  font-size: 31px;
  line-height: 1.2;
}

.feature-card p {
  max-width: 410px;
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.feature-card--wide p {
  color: rgba(255, 255, 255, 0.72);
}

.conversation-orbit {
  position: absolute;
  right: 28px;
  bottom: 24px;
  display: grid;
  width: 168px;
  height: 168px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.19);
  border-radius: 50%;
  box-shadow: 0 0 0 22px rgba(255, 255, 255, 0.05), 0 0 0 44px rgba(255, 255, 255, 0.025);
}

.conversation-orbit__core {
  text-align: center;
}

.conversation-orbit strong {
  display: block;
  font-family: var(--serif);
  font-size: 52px;
  line-height: 1;
}

.conversation-orbit span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
}

.service-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 28px;
}

.service-list span {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid rgba(108, 76, 40, 0.1);
  border-radius: 14px;
  background: rgba(255, 253, 248, 0.58);
  color: #6d5135;
  font-size: 12px;
  font-weight: 700;
}

.service-list span::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber-500);
  content: "";
}

.feature-card__glyph {
  position: absolute;
  right: 27px;
  bottom: 26px;
  display: grid;
  width: 64px;
  height: 64px;
  place-items: center;
  border-radius: 20px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 28px;
}

.feature-card--reminder .feature-card__glyph {
  background: var(--amber-100);
  color: var(--amber-700);
}

.feature-card--drill .feature-card__glyph {
  background: #f6e5df;
  color: var(--rose);
}

.privacy-manifesto {
  position: relative;
  overflow: hidden;
  padding: 142px 0 128px;
  background: var(--green-900);
  color: #fff;
}

.privacy-manifesto::before {
  position: absolute;
  top: -250px;
  right: -170px;
  width: 640px;
  height: 640px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 50%;
  box-shadow: 0 0 0 80px rgba(255, 255, 255, 0.025), 0 0 0 160px rgba(255, 255, 255, 0.018);
  content: "";
}

.privacy-manifesto .eyebrow {
  color: var(--green-300);
}

.privacy-manifesto .section-heading {
  max-width: 900px;
}

.privacy-manifesto .section-heading em {
  color: #f4cc8c;
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 70px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.privacy-card {
  min-height: 330px;
  padding: 34px;
  background: var(--green-900);
}

.privacy-card:nth-child(2) {
  background: #19473b;
}

.privacy-card__icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--green-300);
  font-size: 20px;
}

.privacy-card h3 {
  margin: 24px 0 0;
  font-family: var(--serif);
  font-size: 26px;
}

.privacy-card p {
  margin: 13px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.privacy-card ul {
  display: grid;
  gap: 8px;
  margin: 23px 0 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 13px;
  list-style: none;
}

.privacy-card li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.privacy-card li::before {
  color: var(--green-300);
  content: "✓";
  font-weight: 700;
}

.privacy-card--never li::before {
  color: #e7a78f;
  content: "×";
}

.privacy-promise {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 44px;
  margin-top: 64px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.privacy-promise blockquote {
  max-width: 780px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(25px, 3vw, 38px);
  line-height: 1.4;
}

.privacy-promise .button {
  flex: none;
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
}

.privacy-promise .button:hover {
  background: #fff;
  color: var(--green-900);
}

.how-it-works {
  padding: 138px 0;
  background: #eadfce;
}

.how-layout {
  display: grid;
  grid-template-columns: 0.74fr 1.26fr;
  gap: 92px;
}

.step-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: step;
  list-style: none;
}

.step-list li {
  position: relative;
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  padding: 0 0 48px;
  counter-increment: step;
}

.step-list li:last-child {
  padding-bottom: 0;
}

.step-list li::before {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid rgba(47, 107, 92, 0.25);
  border-radius: 50%;
  color: var(--green-700);
  content: "0" counter(step);
  font-family: var(--serif);
  font-size: 14px;
}

.step-list li::after {
  position: absolute;
  top: 55px;
  bottom: 8px;
  left: 24px;
  width: 1px;
  background: rgba(47, 107, 92, 0.18);
  content: "";
}

.step-list li:last-child::after {
  display: none;
}

.step-list h3 {
  margin: 2px 0 0;
  font-family: var(--serif);
  font-size: 24px;
}

.step-list p {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.developer-info {
  padding: 116px 0;
  background: var(--paper-light);
}

.developer-card {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  gap: 62px;
  padding: 52px;
  border: 1px solid rgba(47, 107, 92, 0.12);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.developer-card__heading h2 {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1.2;
}

.developer-card__heading p {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.info-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.info-list__row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.info-list dt {
  color: var(--ink-faint);
  font-size: 13px;
}

.info-list dd {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
}

.placeholder {
  display: inline-flex;
  padding: 3px 9px;
  border: 1px dashed #d5a15e;
  border-radius: 8px;
  background: #fff8e9;
  color: #8a5a1f;
  font-size: 12px;
  font-weight: 700;
}

.site-footer {
  padding: 70px 0 30px;
  background: #242b27;
  color: #fff;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  padding-bottom: 62px;
}

.site-footer .brand {
  color: #fff;
}

.site-footer__tagline {
  max-width: 430px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.58);
  font-family: var(--serif);
  font-size: 20px;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 36px;
  align-content: start;
}

.site-footer__nav a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  text-decoration: none;
}

.site-footer__nav a:hover {
  color: #fff;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.site-footer__bottom p {
  margin: 0;
}

/* 开发期的"发布前请…"提示原来用这个类（琥珀色警示）。上线后那些文字已删，
   类保留着以防别处还在用。备案号是另一回事：它是法定要求，不是警示，
   所以用和版权行一致的低对比度，别在页脚上抢一块注意力。 */
.site-footer__warning {
  color: #e3bd84;
}

/* 工信部要求备案号必须可点击跳转到 beian.miit.gov.cn，不能只是一段文字。
   这是全站唯一一个站外链接——不是资源加载，不影响"零第三方 SDK"那句话。 */
.site-footer__beian a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  padding-bottom: 1px;
  transition: color 200ms ease, border-color 200ms ease;
}

.site-footer__beian a:hover,
.site-footer__beian a:focus-visible {
  color: rgba(255, 255, 255, 0.78);
  border-color: rgba(255, 255, 255, 0.4);
}

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms cubic-bezier(.2,.75,.25,1), transform 700ms cubic-bezier(.2,.75,.25,1);
}

.has-js [data-reveal][data-visible] {
  opacity: 1;
  transform: translateY(0);
}

.has-js [data-reveal-delay="1"] { transition-delay: 90ms; }
.has-js [data-reveal-delay="2"] { transition-delay: 180ms; }
.has-js [data-reveal-delay="3"] { transition-delay: 270ms; }

.has-js.reveal-complete [data-reveal] {
  opacity: 1;
  transform: none;
  transition: none;
}

/* Legal and support pages */
.subpage-main {
  padding-top: var(--header-height);
}

.subpage-hero {
  position: relative;
  padding: 108px 0 78px;
  overflow: hidden;
}

.subpage-hero::after {
  position: absolute;
  top: -150px;
  right: -120px;
  width: 480px;
  height: 480px;
  border: 1px solid rgba(47, 107, 92, 0.1);
  border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(47, 107, 92, 0.025);
  content: "";
}

.subpage-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.subpage-hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(48px, 7vw, 78px);
  letter-spacing: -0.055em;
  line-height: 1.06;
}

.subpage-hero p {
  max-width: 670px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.subpage-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.subpage-meta span {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.38);
  color: var(--ink-soft);
  font-size: 12px;
}

.document-section {
  padding: 80px 0 128px;
  background: var(--paper-light);
}

.document-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 760px);
  gap: 80px;
  align-items: start;
}

.document-toc {
  position: sticky;
  top: calc(var(--header-height) + 30px);
}

.document-toc__title {
  margin: 0 0 14px;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.document-toc nav {
  display: grid;
  gap: 3px;
}

.document-toc a {
  padding: 7px 10px;
  border-radius: 9px;
  color: var(--ink-soft);
  font-size: 13px;
  text-decoration: none;
}

.document-toc a:hover {
  background: var(--green-50);
  color: var(--green-700);
}

.document-content {
  min-width: 0;
}

.document-notice {
  margin-bottom: 34px;
  padding: 18px 20px;
  border: 1px solid #e7c99d;
  border-radius: 14px;
  background: #fff8e9;
  color: #795b33;
  font-size: 13px;
}

.document-content section {
  padding: 0 0 46px;
  scroll-margin-top: calc(var(--header-height) + 30px);
}

.document-content section + section {
  padding-top: 46px;
  border-top: 1px solid var(--line);
}

.document-content h2 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-size: 29px;
  line-height: 1.3;
}

.document-content h3 {
  margin: 28px 0 10px;
  font-size: 17px;
}

.document-content p,
.document-content li {
  color: var(--ink-soft);
  font-size: 15px;
}

.document-content p {
  margin: 0 0 15px;
}

.document-content ul,
.document-content ol {
  display: grid;
  gap: 8px;
  margin: 16px 0;
  padding-left: 22px;
}

.document-content strong {
  color: var(--ink);
}

.document-table-wrap {
  overflow-x: auto;
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.document-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: #fff;
  font-size: 13px;
}

.document-table th,
.document-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.document-table tr:last-child td {
  border-bottom: 0;
}

.document-table th {
  background: var(--green-50);
  color: var(--green-800);
  font-weight: 700;
}

.document-table td {
  color: var(--ink-soft);
}

.support-hero {
  padding-bottom: 96px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}

.support-card {
  padding: 26px;
  border: 1px solid rgba(47, 107, 92, 0.12);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.66);
}

.support-card__icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 14px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 19px;
}

.support-card h2 {
  margin: 17px 0 0;
  font-family: var(--serif);
  font-size: 22px;
}

.support-card p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.support-content {
  padding: 100px 0 130px;
  background: var(--paper-light);
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 74px;
  align-items: start;
}

.faq-list {
  margin-top: 38px;
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  position: relative;
  padding: 22px 42px 22px 0;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  top: 22px;
  right: 5px;
  color: var(--green-700);
  content: "+";
  font-family: var(--sans);
  font-size: 24px;
  font-weight: 400;
  transition: transform 180ms ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item__answer {
  max-width: 680px;
  padding: 0 42px 24px 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.contact-card {
  position: sticky;
  top: calc(var(--header-height) + 30px);
  padding: 32px;
  border-radius: 28px;
  background: var(--green-700);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

.contact-card h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 28px;
}

.contact-card > p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

.contact-card__item {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-card__label {
  display: block;
  color: rgba(255, 255, 255, 0.54);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.contact-card__value {
  display: block;
  margin-top: 5px;
  font-size: 15px;
  font-weight: 700;
}

.contact-card .placeholder {
  margin-top: 7px;
  border-color: rgba(255, 225, 178, 0.56);
  background: rgba(255, 255, 255, 0.1);
  color: #ffe0ae;
}

@media (max-width: 1080px) {
  .hero {
    min-height: auto;
  }

  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .hero__visual {
    min-height: 540px;
  }

  .status-card--left {
    left: -12px;
  }

  .signal-layout,
  .how-layout {
    gap: 60px;
  }

  .feature-card--wide {
    grid-column: span 6;
  }

  .feature-card--service {
    grid-column: span 6;
  }

  .document-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 48px;
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 68px;
  }

  .container,
  .site-header__inner {
    width: min(calc(100% - 32px), var(--container));
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: calc(var(--header-height) + 8px);
    right: 16px;
    left: 16px;
    display: grid;
    gap: 3px;
    padding: 10px;
    border: 1px solid rgba(47, 107, 92, 0.12);
    border-radius: 22px;
    background: var(--paper-light);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 12px 14px;
  }

  .site-nav .site-nav__cta {
    margin: 3px 0 0;
    text-align: center;
  }

  .hero {
    padding: calc(var(--header-height) + 56px) 0 76px;
  }

  .hero::before {
    top: -220px;
    right: -390px;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero h1 {
    max-width: 620px;
  }

  .hero__visual {
    min-height: 600px;
  }

  .home-window {
    right: 2%;
    left: 2%;
    width: auto;
  }

  .status-card--left {
    bottom: 85px;
    left: 0;
  }

  .signal-section,
  .features,
  .privacy-manifesto,
  .how-it-works {
    padding-block: 100px;
  }

  .signal-layout,
  .how-layout,
  .developer-card,
  .support-layout {
    grid-template-columns: 1fr;
  }

  .signal-copy,
  .contact-card {
    position: static;
  }

  .features__head {
    display: block;
  }

  .features__head .section-intro {
    margin-top: 22px;
  }

  .feature-card--wide,
  .feature-card--service,
  .feature-card--family,
  .feature-card--reminder,
  .feature-card--drill {
    grid-column: span 6;
  }

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

  .privacy-card {
    min-height: 0;
  }

  .privacy-promise {
    align-items: flex-start;
    flex-direction: column;
  }

  .developer-card {
    gap: 40px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .document-layout {
    grid-template-columns: 1fr;
  }

  .document-toc {
    position: static;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
  }

  .document-toc nav {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .brand {
    font-size: 20px;
  }

  .brand img {
    width: 34px;
    height: 34px;
  }

  .section-heading {
    font-size: 40px;
  }

  .section-intro {
    font-size: 16px;
  }

  .hero {
    padding-top: calc(var(--header-height) + 42px);
  }

  .hero__kicker {
    font-size: 11px;
  }

  .hero h1 {
    font-size: clamp(47px, 14.2vw, 68px);
  }

  .hero__lead {
    font-size: 16px;
  }

  .hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero__actions .button {
    width: 100%;
  }

  .hero__promises {
    display: grid;
    gap: 8px;
  }

  .hero__visual {
    min-height: 420px;
  }

  .home-window {
    top: 0;
    padding: 8px;
    border-radius: 28px 28px 70px 28px;
  }

  .home-window::before {
    top: 15px;
    left: 20px;
    transform: scale(.75);
    transform-origin: left center;
  }

  .home-window__scene {
    border-radius: 22px 22px 62px 22px;
  }

  .status-card {
    min-width: 172px;
    padding: 11px 12px;
    border-radius: 16px;
  }

  .status-card__icon {
    width: 34px;
    height: 34px;
    border-radius: 11px;
    font-size: 16px;
  }

  .status-card__label {
    font-size: 9px;
  }

  .status-card__value {
    font-size: 14px;
  }

  .status-card--top {
    top: -20px;
    right: 3px;
  }

  .status-card--left {
    bottom: 68px;
    left: -5px;
    min-width: 158px;
  }

  .status-card--bottom {
    right: 0;
    bottom: 5px;
  }

  .hero__caption {
    display: none;
  }

  .signal-section,
  .features,
  .privacy-manifesto,
  .how-it-works,
  .developer-info,
  .support-content {
    padding-block: 78px;
  }

  .signal-layout,
  .how-layout,
  .support-layout {
    gap: 50px;
  }

  .day-card {
    padding: 22px;
    border-radius: 28px;
  }

  .day-card__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .timeline__item {
    grid-template-columns: 52px 24px 1fr;
  }

  .day-card__privacy {
    align-items: flex-start;
    flex-direction: column;
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .feature-card--wide,
  .feature-card--service,
  .feature-card--family,
  .feature-card--reminder,
  .feature-card--drill {
    grid-column: auto;
  }

  .feature-card {
    min-height: 290px;
    padding: 26px;
  }

  .feature-card--wide {
    min-height: 430px;
  }

  .conversation-orbit {
    right: 50%;
    bottom: 34px;
    transform: translateX(50%);
  }

  .feature-card--wide:hover .conversation-orbit {
    transform: translateX(50%);
  }

  .privacy-card {
    padding: 26px;
  }

  .privacy-promise {
    margin-top: 44px;
  }

  .developer-card {
    padding: 28px 22px;
    border-radius: 28px;
  }

  .info-list__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .site-footer {
    padding-top: 56px;
  }

  .site-footer__nav {
    grid-template-columns: 1fr;
  }

  .site-footer__bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .subpage-hero {
    padding: 76px 0 56px;
  }

  .subpage-hero h1 {
    font-size: 48px;
  }

  .subpage-hero p {
    font-size: 16px;
  }

  .document-section {
    padding: 60px 0 90px;
  }

  .document-toc nav {
    grid-template-columns: 1fr;
  }

  .document-content h2 {
    font-size: 25px;
  }

  .support-card {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}