:root {
  --bg: #f5f2ea;
  --card: #ffffff;
  --ink: #1f2a2a;
  --muted: #66706f;
  --line: #d9dfdc;
  --primary: #0f766e;
  --primary-2: #99f6e4;
  --soft: #e6f4f1;
  --shadow: 0 18px 45px rgba(23, 37, 35, 0.10);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Noto Sans SC", Roboto, Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(153, 246, 228, 0.55), transparent 32%),
    radial-gradient(circle at 88% 18%, rgba(255, 255, 255, 0.75), transparent 30%),
    var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(245, 242, 234, 0.82);
  border-bottom: 1px solid rgba(31, 42, 42, 0.08);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand:hover { text-decoration: none; }

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #99f6e4, #fff7ed);
  box-shadow: 0 10px 28px rgba(15, 118, 110, 0.16);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link, .lang-select {
  border: 1px solid rgba(31, 42, 42, 0.12);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 15px;
}

.nav-link:hover { text-decoration: none; background: rgba(255, 255, 255, 0.95); }

.nav-link.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.lang-select {
  cursor: pointer;
  outline: none;
}

.hero {
  padding: 72px 0 38px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: rgba(153, 246, 228, 0.35);
  border: 1px solid rgba(15, 118, 110, 0.14);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
}

h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.18;
  margin: 18px 0;
  letter-spacing: -0.02em;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.lead {
  font-size: clamp(18px, 2.4vw, 22px);
  color: var(--muted);
  max-width: 760px;
}

.hero-card, .card {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 42, 42, 0.10);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 24px;
  min-height: 310px;
}

.app-icon {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-size: 38px;
  background: linear-gradient(135deg, #ccfbf1, #fff);
  border: 1px solid rgba(15, 118, 110, 0.16);
}

.badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.badge {
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--soft);
  color: #0f5f59;
  font-size: 14px;
  font-weight: 700;
}

.section {
  padding: 34px 0;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  margin: 0 0 18px;
  letter-spacing: -0.03em;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.card {
  padding: 24px;
}

.card h2, .card h3 {
  margin-top: 0;
  line-height: 1.25;
}

.card h3 {
  margin-top: 18px;
  font-size: 18px;
}

.card p { color: var(--muted); }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 800;
  border: 1px solid rgba(15, 118, 110, 0.18);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.button:hover { text-decoration: none; opacity: 0.92; }

.button.secondary {
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
}

.info-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
}

.info-list li {
  padding: 14px 16px;
  border: 1px solid rgba(31, 42, 42, 0.09);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
}

.support-box {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.footer {
  margin-top: 40px;
  padding: 34px 0 42px;
  border-top: 1px solid rgba(31, 42, 42, 0.10);
  color: var(--muted);
  font-size: 14px;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.lang { display: none; }
html[data-lang="zh-TW"] .lang-zh-TW,
html[data-lang="zh-CN"] .lang-zh-CN,
html[data-lang="en"] .lang-en { display: revert; }

@media (max-width: 920px) {
  .cards-grid.three { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .hero-grid, .cards-grid, .cards-grid.three { grid-template-columns: 1fr; }
  .nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav-links { justify-content: flex-start; }
  .hero { padding-top: 38px; }
}