:root {
  color-scheme: light;
  --navy-950: #06142f;
  --navy-900: #0a2148;
  --navy-800: #123261;
  --teal-600: #059ca6;
  --teal-500: #0db9b8;
  --teal-300: #6de0d6;
  --cream: #fffdf6;
  --paper: #ffffff;
  --ink: #13213b;
  --muted: #5b6880;
  --line: #dbe4ee;
  --shadow: 0 24px 80px rgba(6, 20, 47, 0.14);
  --radius: 24px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--teal-300);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(6, 20, 47, 0.92);
  color: white;
  backdrop-filter: blur(18px);
}

.nav {
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: white;
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.92rem;
}

.nav-links a {
  color: #dce8fa;
  text-decoration: none;
}

.nav-links a:hover {
  color: white;
}

.language-link {
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 30%, rgba(13, 185, 184, 0.3), transparent 28%),
    linear-gradient(145deg, var(--navy-950), var(--navy-900) 62%, #0b3c5c);
  color: white;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width: 420px;
  height: 420px;
  left: -220px;
  bottom: -250px;
  border: 1px solid rgba(109, 224, 214, 0.22);
  box-shadow: 0 0 0 56px rgba(109, 224, 214, 0.05), 0 0 0 112px rgba(109, 224, 214, 0.03);
}

.hero::after {
  width: 240px;
  height: 240px;
  top: 110px;
  right: -130px;
  background: rgba(109, 224, 214, 0.08);
}

.hero-inner {
  position: relative;
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 650px;
  margin: 0 auto;
  padding: 86px 0 92px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  align-items: center;
  gap: 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--teal-300);
  font-size: 0.85rem;
  font-weight: 760;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero-copy {
  max-width: 650px;
  margin-bottom: 34px;
  color: #cfdbed;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 14px;
  font-weight: 720;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease;
}

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

.button-primary {
  background: var(--teal-300);
  color: var(--navy-950);
  box-shadow: 0 12px 32px rgba(13, 185, 184, 0.24);
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.07);
  color: white;
}

.product-card {
  position: relative;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.34);
  transform: rotate(2deg);
  backdrop-filter: blur(22px);
}

.app-icon {
  position: absolute;
  top: -46px;
  right: -34px;
  width: 116px;
  height: 116px;
  border: 4px solid rgba(255, 255, 255, 0.7);
  border-radius: 28px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

.mock-app {
  padding: 26px;
  border-radius: 22px;
  background: #f7fbfd;
  color: var(--ink);
}

.mock-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.mock-title {
  font-size: 1.25rem;
  font-weight: 800;
}

.mock-add {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #d9f8f4;
  color: #087a80;
  font-size: 1.25rem;
  font-weight: 600;
}

.search-bar {
  height: 40px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 12px;
  background: #eaf0f5;
  color: #748198;
  font-size: 0.88rem;
}

.contact-row {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid #e3ebf1;
}

.contact-row:last-child {
  border-bottom: 0;
}

.avatar {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--avatar, #caeee9);
  color: var(--navy-800);
  font-weight: 780;
}

.contact-name {
  font-weight: 720;
}

.contact-detail {
  color: #758199;
  font-size: 0.78rem;
}

.tag {
  padding: 3px 8px;
  border-radius: 999px;
  background: #e7f8f6;
  color: #08777b;
  font-size: 0.68rem;
  font-weight: 720;
}

.section {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 104px 0;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-heading h2,
.privacy-hero h1 {
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 5vw, 3.7rem);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.section-heading p {
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 14px 42px rgba(6, 20, 47, 0.06);
}

.feature-number {
  width: 44px;
  height: 44px;
  margin-bottom: 24px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: #e0f8f5;
  color: #077a81;
  font-weight: 820;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.privacy-band {
  background: #ecf8f7;
}

.privacy-panel {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  align-items: center;
}

.privacy-mark {
  position: relative;
  width: min(320px, 100%);
  aspect-ratio: 1;
  margin: 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid rgba(5, 156, 166, 0.2);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: 0 0 0 34px rgba(255, 255, 255, 0.38), 0 0 0 68px rgba(255, 255, 255, 0.2);
}

.privacy-mark span {
  width: 116px;
  height: 116px;
  display: grid;
  place-items: center;
  border: 3px solid var(--teal-600);
  border-radius: 50% 50% 44% 44%;
  color: var(--teal-600);
  font-size: 2.7rem;
  font-weight: 850;
}

.privacy-copy h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.privacy-copy p {
  color: var(--muted);
  font-size: 1.06rem;
}

.privacy-list {
  margin: 24px 0 30px;
  padding: 0;
  display: grid;
  gap: 12px;
  list-style: none;
}

.privacy-list li {
  display: flex;
  gap: 12px;
}

.privacy-list li::before {
  content: "✓";
  color: var(--teal-600);
  font-weight: 850;
}

.text-link {
  color: #087a80;
  font-weight: 760;
  text-underline-offset: 4px;
}

.site-footer {
  background: var(--navy-950);
  color: #bfcbde;
}

.footer-inner {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 54px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: #dce7f7;
  text-underline-offset: 4px;
}

.privacy-hero {
  background: linear-gradient(145deg, var(--navy-950), var(--navy-900));
  color: white;
}

.privacy-hero-inner {
  width: min(calc(100% - 40px), 820px);
  margin: 0 auto;
  padding: 92px 0 84px;
}

.privacy-hero p {
  max-width: 680px;
  margin-bottom: 0;
  color: #cbd8eb;
  font-size: 1.08rem;
}

.legal {
  width: min(calc(100% - 40px), 820px);
  margin: 0 auto;
  padding: 76px 0 110px;
}

.legal .updated {
  margin-bottom: 44px;
  color: var(--muted);
  font-size: 0.92rem;
}

.legal h2 {
  margin: 44px 0 14px;
  font-size: 1.45rem;
  line-height: 1.3;
  letter-spacing: -0.025em;
}

.legal p,
.legal li {
  color: #3f4e65;
}

.legal ul {
  padding-left: 1.3rem;
}

.notice {
  margin: 30px 0;
  padding: 22px 24px;
  border-left: 4px solid var(--teal-500);
  border-radius: 4px 16px 16px 4px;
  background: #eaf8f6;
}

.support-intro {
  max-width: 680px;
  margin-bottom: 44px;
  color: var(--muted);
  font-size: 1.08rem;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0 0 56px;
}

.support-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
  box-shadow: 0 12px 34px rgba(6, 20, 47, 0.05);
}

.support-card h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.support-card p,
.support-card li {
  color: #3f4e65;
}

.support-card ul,
.support-card ol {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.support-card a {
  color: #087a80;
  font-weight: 720;
  text-underline-offset: 4px;
}

.support-section {
  margin-top: 58px;
  padding-top: 54px;
  border-top: 1px solid var(--line);
}

.support-section h2 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.04em;
}

.support-section p,
.support-section li {
  color: #3f4e65;
}

.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.support-actions .button-primary {
  background: var(--navy-900);
  color: white;
}

.support-actions .button-secondary {
  border-color: var(--line);
  background: white;
  color: var(--navy-900);
}

.safety-notice {
  margin-top: 26px;
  padding: 22px 24px;
  border: 1px solid #f1d3a0;
  border-radius: 16px;
  background: #fff7e8;
  color: #684c1e;
}

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: 72px;
  }

  .product-card {
    width: min(520px, 100%);
    margin: 14px auto 0;
    transform: none;
  }

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

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

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

  .privacy-mark {
    width: 230px;
  }
}

@media (max-width: 620px) {
  .nav {
    min-height: 64px;
  }

  .nav-links a:not(.language-link) {
    display: none;
  }

  .hero-inner {
    min-height: auto;
    padding: 68px 0 74px;
    gap: 64px;
  }

  h1 {
    font-size: clamp(2.75rem, 15vw, 4.2rem);
  }

  .app-icon {
    right: 10px;
    width: 92px;
    height: 92px;
    border-radius: 24px;
  }

  .mock-app {
    padding: 20px;
  }

  .section {
    padding: 78px 0;
  }

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

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

  .button {
    transition: none;
  }
}