/* TaskKin Care 官网样式 - 简洁专业，响应式 */
:root {
  --teal: #0f766e;
  --teal-dark: #0b5a54;
  --teal-light: #e6f4f1;
  --ink: #172026;
  --muted: #5b6770;
  --line: #e2e8ec;
  --bg: #f8faf9;
  --surface: #ffffff;
  --amber: #a76600;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(16, 40, 36, 0.06), 0 8px 24px rgba(16, 40, 36, 0.05);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--teal);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
a:focus-visible {
  outline: 3px solid #0f766e;
  outline-offset: 3px;
}
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Nav */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}
.brand img {
  width: 26px;
  height: 26px;
}
nav ul {
  display: flex;
  gap: 24px;
  list-style: none;
}
nav ul a {
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
}
nav ul a:hover {
  color: var(--teal);
  text-decoration: none;
}
.language-switcher {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.language-switcher a {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 30px;
  min-width: 34px;
  text-align: center;
  padding: 0 7px;
}
.language-switcher a + a {
  border-left: 1px solid var(--line);
}
.language-switcher a:hover,
.language-switcher a.active {
  background: var(--teal-light);
  color: var(--teal-dark);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 72px 0 56px;
}
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(220px, 0.65fr);
  align-items: center;
  gap: 48px;
}
.hero-copy {
  text-align: left;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero h1 .accent {
  color: var(--teal);
}
.hero p.lead {
  font-size: 19px;
  color: var(--muted);
  max-width: 620px;
  margin: 0 0 28px;
}
.badges {
  display: flex;
  gap: 10px;
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.badge {
  background: var(--teal-light);
  color: var(--teal-dark);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.cta {
  display: inline-flex;
  gap: 12px;
}
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s;
}
.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}
.btn-primary {
  background: var(--teal);
  color: #fff;
}
.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
}
.hero-preview {
  margin: 0;
  justify-self: center;
}
.hero-preview img {
  display: block;
  width: min(100%, 300px);
  max-height: 465px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

/* Section */
section {
  padding: 56px 0;
}
.surface-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
section h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
section .sub {
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 640px;
}

/* Features grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card .ico {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--teal-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}
.card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.card p {
  font-size: 14px;
  color: var(--muted);
}

/* Screenshots */
.shots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 12px;
}
.shot {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  box-shadow: var(--shadow);
  text-align: center;
}
.shot img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.shot .cap {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

/* Steps */
.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step h4 {
  font-size: 15px;
  margin-bottom: 4px;
}
.step p {
  font-size: 13px;
  color: var(--muted);
}

/* Contact / feedback */
.contact {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
}
.contact h2 {
  margin-bottom: 8px;
}
.contact .email {
  font-size: 22px;
  font-weight: 700;
  color: var(--teal);
  margin: 12px 0;
}
.contact .small {
  font-size: 14px;
  color: var(--muted);
}

/* FAQ */
.faq {
  max-width: 760px;
  margin: 0 auto;
}
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 12px;
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
  font-size: 15px;
}
.faq details[open] summary {
  margin-bottom: 8px;
}
.faq p {
  font-size: 14px;
  color: var(--muted);
}

/* Footer */
footer {
  background: var(--ink);
  color: #cdd6d2;
  padding: 40px 0;
  margin-top: 40px;
}
footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
footer a {
  color: #9fb3ad;
}
footer .col h5 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 8px;
}
footer .col a {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
}
.footer-note {
  margin-top: 24px;
  font-size: 12px;
  color: #9fb3ad;
}

/* Privacy page */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 20px;
}
.prose h1 {
  font-size: 32px;
  margin-bottom: 8px;
}
.prose h2 {
  font-size: 22px;
  margin: 28px 0 10px;
}
.prose p,
.prose li {
  color: var(--muted);
  margin-bottom: 10px;
  font-size: 15px;
}
.prose ul {
  padding-left: 20px;
}

/* Responsive */
@media (max-width: 820px) {
  .hero h1 {
    font-size: 32px;
  }
  .hero p.lead {
    font-size: 16px;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-copy {
    text-align: center;
  }
  .badges {
    justify-content: center;
  }
  .hero p.lead {
    margin-left: auto;
    margin-right: auto;
  }
  .shots {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps {
    grid-template-columns: 1fr 1fr;
  }
  nav .container {
    gap: 12px;
  }
  nav ul {
    flex: 1 1 auto;
    gap: 16px;
    overflow-x: auto;
    white-space: nowrap;
    padding: 4px 0;
  }
  nav ul a {
    font-size: 14px;
  }
  .language-switcher a {
    min-width: 30px;
    padding: 0 5px;
  }
}
@media (max-width: 480px) {
  .steps {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 48px 0 32px;
  }
  section {
    padding: 40px 0;
  }
  .shots {
    grid-template-columns: 1fr;
  }
}