:root {
  --bg: #f5fbfc;
  --ink: #102729;
  --muted: #5f7375;
  --line: #d8e8e7;
  --teal: #18c3b7;
  --green: #20d783;
  --blue: #15aee8;
  --card: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 4%, rgba(24, 195, 183, .18), transparent 28%),
    radial-gradient(circle at 88% 10%, rgba(21, 174, 232, .16), transparent 24%),
    var(--bg);
  line-height: 1.65;
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 6vw, 72px);
  background: rgba(245, 251, 252, .92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

nav a:hover {
  color: var(--ink);
  border-color: var(--teal);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  gap: 48px;
  align-items: center;
  min-height: 720px;
  padding: 58px 0 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #0d9d93;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 8px;
  font-size: clamp(56px, 8vw, 110px);
  line-height: .92;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.08;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.lede {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 26px;
}

.hero-text {
  max-width: 650px;
  color: var(--muted);
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
}

.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--green));
}

.secondary {
  color: #0c8c84;
  border: 1px solid var(--line);
  background: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 36px;
}

.stats span {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, .7);
  color: var(--muted);
}

.stats strong {
  display: block;
  color: var(--ink);
  font-size: 34px;
  line-height: 1;
}

.phone-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 560px;
}

.phone-stage::before {
  content: "";
  position: absolute;
  width: 82%;
  height: 82%;
  border-radius: 40px;
  background: linear-gradient(145deg, rgba(21,174,232,.18), rgba(32,215,131,.18));
  transform: rotate(-8deg);
}

.phone {
  position: relative;
  width: min(350px, 88vw);
  min-height: 530px;
  padding: 28px;
  border: 10px solid #102729;
  border-radius: 42px;
  color: #fff;
  background: linear-gradient(160deg, #10b7cf 0%, #17c8ab 44%, #24d776 100%);
  box-shadow: 0 35px 90px rgba(16, 39, 41, .22);
}

.speaker {
  width: 72px;
  height: 6px;
  margin: 0 auto 30px;
  border-radius: 99px;
  background: rgba(255, 255, 255, .56);
}

.score {
  display: grid;
  justify-items: center;
  padding: 18px 0 24px;
}

.score img {
  width: 116px;
  height: 116px;
  margin-bottom: 14px;
  border-radius: 26px;
  box-shadow: 0 18px 36px rgba(7, 73, 76, .2);
}

.score strong {
  font-size: 54px;
  line-height: 1;
}

.score span,
.storage span {
  color: rgba(255,255,255,.78);
}

.storage {
  padding: 16px;
  border-radius: 14px;
  background: rgba(255,255,255,.16);
}

.storage div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
  font-size: 13px;
}

.storage i {
  display: block;
  height: 10px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255,255,255,.3);
}

.storage b {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: #fff;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.mini-grid span {
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(255,255,255,.22);
  text-align: center;
  font-weight: 700;
}

.suggestion {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 14px;
  color: #0b6865;
  background: #fff;
  text-align: center;
  font-weight: 800;
}

.shield-check {
  position: absolute;
  right: 8%;
  bottom: 12%;
  display: grid;
  place-items: center;
  width: 112px;
  height: 112px;
  border: 8px solid #fff;
  border-radius: 32px;
  color: #fff;
  background: #12383b;
  box-shadow: 0 24px 60px rgba(16, 39, 41, .28);
  font-size: 64px;
  font-weight: 900;
}

.intro, .split {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 36px;
  align-items: center;
}

.intro, .section, .workflow, .privacy-band, .cta {
  margin: 54px 0;
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 18px 70px rgba(16, 39, 41, .06);
}

.intro img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: 16px;
}

.cards {
  grid-template-columns: repeat(3, 1fr);
}

article, .list-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  box-shadow: 0 12px 36px rgba(16, 39, 41, .04);
}

article small {
  display: block;
  margin-bottom: 6px;
  color: #0d9d93;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

article p, .section p, .intro p, .cta p {
  color: var(--muted);
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--green));
  font-weight: 800;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.workflow div {
  padding: 22px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, #12383b, #0f8f8a);
}

.workflow strong, .workflow span {
  display: block;
}

.privacy-band {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 36px;
  align-items: stretch;
  color: #fff;
  background: linear-gradient(135deg, #10373b, #13baa9);
}

.privacy-band .eyebrow, .privacy-band p { color: #d9fffa; }

.privacy-band h2 {
  margin-bottom: 18px;
}

.privacy-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.privacy-cards article {
  min-height: 178px;
  padding: 22px;
  border-color: rgba(255,255,255,.16);
  color: #fff;
  background: rgba(255,255,255,.18);
  box-shadow: none;
}

.privacy-cards article small {
  color: rgba(255,255,255,.68);
  font-size: 12px;
}

.privacy-cards article h3 {
  margin-bottom: 10px;
  color: #fff;
  font-size: 22px;
}

.privacy-cards article p {
  margin-bottom: 0;
  color: rgba(255,255,255,.82);
  font-size: 15px;
  line-height: 1.55;
}

.cta { text-align: center; }

.center {
  justify-content: center;
}

.list-panel p {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px;
  margin: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.list-panel p:last-child {
  border-bottom: 0;
}

.list-panel strong {
  color: var(--ink);
}

.module-grid,
.assurance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.module-grid div,
.assurance-grid span {
  min-height: 128px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.module-grid strong,
.module-grid span {
  display: block;
}

.module-grid span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.assurance {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 28px;
  align-items: start;
}

.assurance-grid span {
  min-height: auto;
  color: #0f6866;
  font-weight: 800;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 20px 46px;
  color: var(--muted);
}

footer div {
  display: flex;
  gap: 16px;
}

.legal {
  max-width: 900px;
  padding-top: 58px;
}

.legal h1 {
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1.05;
}

.date {
  margin-bottom: 34px;
  color: var(--muted);
}

.legal article {
  margin-bottom: 16px;
}

.legal article h2 {
  font-size: 22px;
}

@media (max-width: 820px) {
  .nav, footer {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

  .hero, .intro, .split, .privacy-band, .assurance {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .cards, .workflow, .stats, .module-grid, .assurance-grid {
    grid-template-columns: 1fr;
  }

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

  .intro, .section, .workflow, .privacy-band, .cta {
    padding: 28px;
  }

  .phone-stage {
    min-height: 520px;
  }

  .shield-check {
    right: 0;
    bottom: 5%;
    width: 88px;
    height: 88px;
    font-size: 48px;
  }

  .list-panel p {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}