:root {
  color: #1e2420;
  background: #ffffff;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  --white: #ffffff;
  --white-soft: #fbfdfc;
  --green-wash: #eef7f3;
  --green-band: #f3faf7;
  --ink: #1e2420;
  --muted: #687670;
  --muted-soft: #96a39d;
  --line: rgba(30, 36, 32, 0.10);
  --line-strong: rgba(0, 107, 93, 0.22);
  --green: #006b5d;
  --deep-green: #315d45;
  --mint: #63d2bd;
  --shadow-soft: 0 24px 70px rgba(29, 57, 48, 0.10);
  --shadow-small: 0 12px 34px rgba(29, 57, 48, 0.07);
  --content: 1260px;
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 76% 13%, rgba(0, 107, 93, 0.055), transparent 24vw),
    radial-gradient(circle at 18% 48%, rgba(99, 210, 189, 0.07), transparent 28vw),
    linear-gradient(180deg, #ffffff 0%, #fbfdfc 52%, #ffffff 100%);
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
  height: auto;
}

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

a:focus-visible {
  outline: 3px solid rgba(99, 210, 189, 0.46);
  outline-offset: 4px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2 {
  font-family:
    "Noto Serif SC", "Songti SC", "STSong", "PingFang SC", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 520px;
  font-size: clamp(48px, 6.2vw, 76px);
  line-height: 1.06;
}

h1 span {
  color: var(--green);
}

h2 {
  font-size: clamp(30px, 3.7vw, 48px);
  line-height: 1.16;
}

h3 {
  font-size: 18px;
  font-weight: 760;
  line-height: 1.28;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--content);
  margin: 0 auto;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.brand,
.site-header nav,
.hero-actions,
.summary-strip,
.summary-strip article,
.window-bar,
.feature-list article,
footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  color: var(--deep-green);
  font-size: 19px;
  font-weight: 840;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.site-header nav {
  gap: 34px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 720;
}

.site-header nav a {
  opacity: 0.82;
  transition: color 180ms var(--ease-soft), opacity 180ms var(--ease-soft);
}

.site-header nav a:hover {
  color: var(--green);
  opacity: 1;
}

.header-action,
.primary-action,
.secondary-action,
.text-link {
  transition:
    transform 220ms var(--ease-soft),
    border-color 220ms var(--ease-soft),
    background-color 220ms var(--ease-soft),
    box-shadow 220ms var(--ease-soft);
}

.header-action,
.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 800;
  line-height: 20px;
  white-space: nowrap;
}

.header-action,
.primary-action {
  background: linear-gradient(135deg, var(--green), var(--deep-green));
  color: var(--white);
  box-shadow: 0 14px 28px rgba(0, 107, 93, 0.18);
}

.header-action {
  padding: 0 20px;
}

.primary-action {
  padding: 0 24px;
}

.secondary-action {
  padding: 0 22px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.74);
  color: var(--green);
}

.secondary-action::after {
  margin-left: 8px;
  content: "↓";
}

.header-action:hover,
.primary-action:hover,
.secondary-action:hover,
.text-link:hover {
  transform: translateY(-1px);
}

.header-action:hover,
.primary-action:hover {
  box-shadow: 0 18px 34px rgba(0, 107, 93, 0.24);
}

.hero {
  display: grid;
  max-width: var(--content);
  min-height: 650px;
  grid-template-columns: minmax(330px, 0.78fr) minmax(560px, 1.22fr);
  gap: clamp(42px, 5.8vw, 88px);
  align-items: center;
  margin: 0 auto;
  padding: 92px 24px 70px;
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-lede {
  max-width: 520px;
  margin-top: 30px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 480;
  line-height: 1.88;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 36px;
}

.hero-note {
  margin-top: 48px;
  color: var(--muted-soft);
  font-size: 13px;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.hero-visual::before {
  position: absolute;
  right: -120px;
  bottom: 48px;
  width: 720px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 210, 189, 0.16), rgba(238, 247, 243, 0.26) 56%, transparent 74%);
  content: "";
}

.desktop-frame,
.phone-frame,
.timeline-demo,
.device-card,
.privacy-flow article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.desktop-frame {
  position: absolute;
  right: 0;
  top: 44px;
  width: min(680px, 58vw);
  overflow: hidden;
}

.window-bar {
  height: 38px;
  gap: 8px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
}

.window-bar span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #9bc8b8;
}

.window-bar span:first-child {
  background: #de7166;
}

.window-bar span:nth-child(2) {
  background: #e4c56e;
}

.window-bar small {
  margin-left: auto;
  color: var(--muted-soft);
  font-size: 11px;
  font-weight: 700;
}

.desktop-frame img {
  width: 100%;
}

.phone-frame {
  position: absolute;
  left: 14px;
  bottom: 20px;
  width: min(178px, 18vw);
  overflow: hidden;
  border: 7px solid #18221e;
  border-radius: 28px;
  background: #ffffff;
  box-shadow: 0 28px 62px rgba(29, 57, 48, 0.24);
}

.phone-frame img {
  width: 100%;
}

.summary-strip {
  max-width: var(--content);
  gap: 28px;
  margin: 0 auto;
  padding: 44px 24px 76px;
  border-top: 1px solid var(--line);
}

.summary-strip article {
  flex: 1 1 0;
  gap: 20px;
  min-width: 0;
}

.line-icon {
  display: inline-flex;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 107, 93, 0.12);
  border-radius: 999px;
  background: rgba(238, 247, 243, 0.72);
  color: var(--green);
}

.line-icon svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.line-icon.small {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

.line-icon.small svg {
  width: 21px;
  height: 21px;
}

.line-icon.large {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: 12px;
}

.summary-strip strong {
  display: block;
  color: var(--green);
  font-size: 18px;
  line-height: 1.3;
}

.summary-strip p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.58;
}

.section {
  max-width: var(--content);
  margin: 0 auto;
  padding: 86px 24px;
}

.section-copy {
  max-width: 480px;
}

.section-copy p,
.platform-heading p,
.privacy-copy p,
.closing p {
  margin-top: 20px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.78;
}

.timeline-section {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(24px, 1fr) minmax(300px, 430px) minmax(0, 630px) minmax(24px, 1fr);
  gap: clamp(40px, 7vw, 92px);
  align-items: center;
  padding-top: 88px;
  padding-bottom: 90px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 76% 50%, rgba(99, 210, 189, 0.11), transparent 28vw),
    linear-gradient(90deg, #ffffff 0%, var(--green-band) 100%);
}

.timeline-section .section-copy {
  grid-column: 2;
}

.timeline-demo {
  grid-column: 3;
}

.text-link {
  display: inline-flex;
  margin-top: 34px;
  color: var(--green);
  font-size: 15px;
  font-weight: 820;
}

.text-link::after {
  margin-left: 8px;
  content: "→";
}

.timeline-demo {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 32px 34px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.time-rail {
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: 102px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-strong), transparent);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.timeline-item::before {
  position: absolute;
  top: 8px;
  left: 82px;
  z-index: 1;
  width: 10px;
  height: 10px;
  border: 2px solid var(--green);
  border-radius: 999px;
  background: var(--white);
  content: "";
}

.timeline-item time {
  color: var(--ink);
  font-family:
    "SFMono-Regular", "Roboto Mono", Consolas, monospace;
  font-size: 14px;
}

.timeline-item > div {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.timeline-item h3 {
  margin-top: 10px;
}

.timeline-item p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--green-wash);
  color: var(--green);
  font-size: 12px;
  font-weight: 820;
}

.tag.accent {
  background: rgba(255, 111, 60, 0.09);
  color: #cf6337;
}

.photo-row {
  display: flex;
  gap: 8px;
  margin-top: 15px;
}

.photo-row span {
  width: 72px;
  height: 46px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 72% 30%, rgba(255, 255, 255, 0.74), transparent 20%),
    linear-gradient(135deg, #cfe7de, #e9f4ef 50%, #d7eee4);
}

.photo-row span:nth-child(2) {
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.7), transparent 20%),
    linear-gradient(135deg, #e7d3ab, #c7e3ca 48%, #f2eee2);
}

.photo-row span:nth-child(3) {
  background:
    radial-gradient(circle at 65% 30%, rgba(255, 255, 255, 0.8), transparent 20%),
    linear-gradient(135deg, #f0c995, #daeccf 52%, #d9a96b);
}

.platform-heading {
  margin-bottom: 34px;
}

.platform-heading h2 span {
  font-family: inherit;
  font-size: 0.64em;
  font-weight: 600;
}

.platform-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.device-card {
  min-height: 292px;
  padding: 28px 28px 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 110%, rgba(0, 107, 93, 0.08), transparent 48%),
    var(--green-wash);
  box-shadow: none;
}

.device-title {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 820;
}

.soft-device-icon {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--green);
  font-weight: 800;
}

.laptop-mock {
  position: relative;
  margin: 34px auto 0;
  padding: 10px 10px 0;
  border: 5px solid #19211e;
  border-bottom: 0;
  border-radius: 10px 10px 0 0;
  background: #ffffff;
  box-shadow: 0 18px 32px rgba(29, 57, 48, 0.12);
}

.laptop-mock::after {
  display: block;
  width: calc(100% + 42px);
  height: 12px;
  margin: 0 -21px -12px;
  border-radius: 0 0 18px 18px;
  background: linear-gradient(180deg, #293531, #909c97);
  content: "";
}

.laptop-mock img {
  width: 100%;
  height: 160px;
  object-fit: contain;
  object-position: 50% 0;
  background: #ffffff;
}

.phone-cluster {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
}

.phone-cluster img {
  width: 96px;
  height: 214px;
  border: 5px solid #18221e;
  border-radius: 22px;
  object-fit: cover;
  object-position: 50% 0;
  box-shadow: 0 16px 30px rgba(29, 57, 48, 0.12);
}

.phone-cluster img:nth-child(2) {
  transform: translateY(12px);
  opacity: 0.9;
}

.features {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(24px, 1fr) minmax(260px, 370px) minmax(0, 700px) minmax(24px, 1fr);
  gap: clamp(36px, 7vw, 84px);
  align-items: center;
  padding-top: 74px;
  padding-bottom: 74px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 74% 48%, rgba(0, 107, 93, 0.08), transparent 28vw),
    var(--green-band);
}

.features .section-copy {
  grid-column: 2;
}

.feature-list {
  display: grid;
  grid-column: 3;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px 54px;
}

.feature-list article {
  gap: 16px;
  align-items: flex-start;
}

.feature-list h3 {
  color: var(--green);
  font-size: 17px;
}

.feature-list p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
}

.privacy {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 0.78fr);
  gap: clamp(36px, 7vw, 90px);
  align-items: center;
  border-top: 1px solid var(--line);
}

.privacy-copy {
  max-width: 460px;
}

.privacy-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 84px;
}

.privacy-flow::before {
  position: absolute;
  top: 50%;
  left: 12%;
  right: 12%;
  height: 1px;
  border-top: 1px dashed rgba(0, 107, 93, 0.28);
  content: "";
}

.privacy-flow article {
  position: relative;
  min-height: 172px;
  padding: 26px 22px;
  text-align: center;
  box-shadow: none;
}

.privacy-flow strong {
  display: block;
  color: var(--green);
  font-size: 18px;
}

.privacy-flow article > span:last-child {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.56;
}

.closing {
  position: relative;
  display: grid;
  max-width: var(--content);
  grid-template-columns: minmax(0, 0.74fr) minmax(360px, 0.78fr);
  gap: 48px;
  align-items: center;
  margin: 0 auto;
  padding: 76px 24px 64px;
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.closing p {
  max-width: 580px;
}

.closing-art {
  position: relative;
  min-height: 190px;
}

.closing-art img {
  position: absolute;
  top: 8px;
  left: 50%;
  z-index: 2;
  width: 102px;
  height: 102px;
  transform: translateX(-50%);
  filter: drop-shadow(0 18px 24px rgba(0, 107, 93, 0.12));
}

.mountain {
  position: absolute;
  right: 2%;
  bottom: 14px;
  width: 330px;
  height: 88px;
  border-radius: 48% 52% 0 0 / 100% 100% 0 0;
  background: linear-gradient(135deg, rgba(0, 107, 93, 0.06), rgba(0, 107, 93, 0.24));
  clip-path: polygon(0 100%, 20% 56%, 34% 76%, 52% 30%, 72% 82%, 88% 46%, 100% 100%);
}

.mountain-b {
  right: 34%;
  width: 260px;
  height: 66px;
  opacity: 0.6;
}

footer {
  justify-content: space-between;
  gap: 18px;
  max-width: var(--content);
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 1120px) {
  .site-header nav {
    gap: 20px;
  }

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

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 610px;
  }

  .desktop-frame {
    width: min(780px, 100%);
  }

  .phone-frame {
    left: auto;
    right: 28px;
    width: 178px;
  }

  .summary-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-section,
  .features {
    grid-template-columns: minmax(24px, 1fr) minmax(0, 920px) minmax(24px, 1fr);
  }

  .timeline-section .section-copy,
  .timeline-demo,
  .features .section-copy,
  .feature-list {
    grid-column: 2;
  }

  .platform-cards {
    grid-template-columns: 1fr;
  }

  .device-card {
    max-width: 640px;
  }

  .privacy-flow {
    max-width: 760px;
    gap: 18px;
  }
}

@media (max-width: 760px) {
  .site-header {
    position: static;
    min-height: auto;
  }

  .site-header nav,
  .header-action {
    display: none;
  }

  .brand {
    font-size: 16px;
  }

  h1 {
    font-size: 40px;
    line-height: 1.12;
  }

  h2 {
    font-size: 30px;
  }

  .hero {
    padding-top: 46px;
    padding-bottom: 48px;
  }

  .hero-lede,
  .section-copy p,
  .platform-heading p,
  .privacy-copy p,
  .closing p {
    font-size: 16px;
    line-height: 1.72;
  }

  .hero-note {
    margin-top: 28px;
  }

  .hero-visual {
    min-height: 430px;
    margin-top: 6px;
  }

  .desktop-frame {
    right: auto;
    left: 0;
    width: 100%;
  }

  .phone-frame {
    right: 8px;
    bottom: 12px;
    width: 136px;
    border-width: 5px;
    border-radius: 20px;
  }

  .summary-strip {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 34px;
    padding-bottom: 58px;
  }

  .section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .timeline-section,
  .features {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .timeline-demo {
    padding: 20px;
  }

  .time-rail {
    left: 74px;
  }

  .timeline-item {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 14px;
  }

  .timeline-item::before {
    left: 56px;
  }

  .timeline-item > div {
    padding: 16px;
  }

  .photo-row span {
    width: 46px;
  }

  .platform-cards,
  .feature-list,
  .privacy-flow {
    grid-template-columns: 1fr;
  }

  .device-card {
    padding: 22px 22px 0;
  }

  .laptop-mock img {
    height: 130px;
  }

  .privacy-flow {
    gap: 14px;
  }

  .privacy-flow::before {
    display: none;
  }

  .closing {
    padding-top: 66px;
    padding-bottom: 58px;
  }

  .closing-art {
    min-height: 150px;
  }

  .closing-art img {
    left: 56px;
    width: 88px;
    height: 88px;
    transform: none;
  }

  .mountain {
    right: 0;
    width: 250px;
  }

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