:root {
  --bg: #f4faf6;
  --bg-alt: #e8f5ec;
  --card: #ffffff;
  --text: #1a2e1f;
  --muted: #5b6b5f;
  --green: #16a34a;
  --green-dark: #15803d;
  --green-light: #dcfce7;
  --border: #d1e7d7;
  --shadow: 0 12px 40px rgba(22, 163, 74, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  position: relative;
  min-height: 100vh;
}

/* 動態背景（風格對齊 App 登入頁） */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-bg-gradient {
  position: absolute;
  inset: -20%;
  background: linear-gradient(
    135deg,
    #f0fdf4 0%,
    #dcfce7 38%,
    #ecfdf5 62%,
    #ffffff 100%
  );
  background-size: 200% 200%;
  animation: bg-gradient-shift 14s ease-in-out infinite;
}

.page-bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.55;
  will-change: transform;
}

.page-bg-blob-1 {
  width: min(52vw, 420px);
  height: min(52vw, 420px);
  left: -8%;
  top: 6%;
  background: rgba(134, 239, 172, 0.45);
  animation: blob-float-1 18s ease-in-out infinite;
}

.page-bg-blob-2 {
  width: min(40vw, 320px);
  height: min(40vw, 320px);
  right: -6%;
  top: 18%;
  background: rgba(153, 246, 228, 0.4);
  animation: blob-float-2 22s ease-in-out infinite;
}

.page-bg-blob-3 {
  width: min(56vw, 460px);
  height: min(56vw, 460px);
  left: 28%;
  bottom: -12%;
  background: rgba(187, 247, 208, 0.5);
  animation: blob-float-3 20s ease-in-out infinite;
}

@keyframes bg-gradient-shift {
  0%,
  100% {
    background-position: 0% 40%;
  }
  50% {
    background-position: 100% 60%;
  }
}

@keyframes blob-float-1 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(6vw, 4vh) scale(1.06);
  }
}

@keyframes blob-float-2 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-5vw, 6vh) scale(1.08);
  }
}

@keyframes blob-float-3 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-4vw, -5vh) scale(1.05);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-bg-gradient,
  .page-bg-blob {
    animation: none;
  }
}

/* 隱私權政策等法律頁面 */
.legal-page {
  padding: 32px 0 48px;
}

.legal-container {
  max-width: 720px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px 36px;
  box-shadow: var(--shadow);
}

.legal-container h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
  color: var(--green-dark);
}

.legal-updated {
  margin: 0 0 20px;
  font-size: 0.9rem;
  color: var(--muted);
}

.legal-lead {
  margin: 0 0 28px;
}

.legal-container section {
  margin-bottom: 28px;
}

.legal-container h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  color: var(--text);
}

.legal-container h3 {
  margin: 16px 0 8px;
  font-size: 1rem;
  color: var(--muted);
}

.legal-container ul {
  margin: 8px 0 12px;
  padding-left: 1.25em;
}

.legal-container li {
  margin-bottom: 6px;
}

.legal-container a {
  color: var(--green-dark);
}

.legal-back {
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
  .legal-container {
    padding: 20px 18px 28px;
  }
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}

.brand-logo {
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.2);
}

.header-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.header-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.header-nav a:hover {
  color: var(--green-dark);
}

.hero {
  padding: 56px 0 40px;
  background: transparent;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-dark);
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
}

.lead {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 36em;
}

.version {
  margin: 0 0 24px;
  font-size: 0.9rem;
  color: var(--muted);
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* 官方圖檔留白不同，改以「徽章黑底高度」對齊，而非同一外框 */
.store-badge-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 0;
  border-radius: 8px;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.store-badge-link:hover {
  transform: translateY(-2px);
  opacity: 0.92;
}

.store-badge-link:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.store-badge-disabled {
  opacity: 0.42;
  filter: grayscale(1);
  pointer-events: none;
  cursor: not-allowed;
}

.store-badge-img {
  display: block;
  width: auto;
  max-width: none;
}

/* Google PNG 內邊距較大，需略放大；App Store SVG 較貼邊，略縮小 */
.store-badge-img--google {
  height: 54px;
}

.store-badge-img--apple {
  height: 40px;
}

@media (max-width: 480px) {
  .store-badge-img--google {
    height: 48px;
  }

  .store-badge-img--apple {
    height: 36px;
  }
}

.phone-frame {
  margin: 0 auto;
  max-width: 280px;
  padding: 14px;
  border-radius: 32px;
  background: linear-gradient(145deg, #fff, var(--green-light));
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.phone-screen {
  border-radius: 24px;
  background: #fff;
  padding: 40px 24px;
  text-align: center;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.phone-screen img {
  border-radius: 24px;
}

.phone-screen p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.section {
  padding: 56px 0;
}

.section-alt {
  background: rgba(232, 245, 236, 0.45);
}

.section h2 {
  margin: 0 0 12px;
  font-size: 1.75rem;
  text-align: center;
}

.section-desc {
  text-align: center;
  color: var(--muted);
  margin: 0 auto 28px;
  max-width: 32em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.feature-card h3 {
  margin: 0 0 12px;
  color: var(--green-dark);
}

.feature-card ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.feature-card li {
  margin-bottom: 6px;
}

.support-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 28px;
  align-items: start;
}

.support-desc {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.support-email-line {
  margin: 16px 0 20px;
  font-size: 1rem;
}

.support-panel {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 8px 28px rgba(22, 163, 74, 0.08);
}

.support-panel-title {
  margin: 0 0 16px;
  font-size: 1.1rem;
  color: var(--green-dark);
}

.support-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.support-form input,
.support-form select,
.support-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 14px;
}

.support-form textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-primary {
  display: inline-block;
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  background: var(--green);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--green-dark);
}

.btn-outline {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--green);
  color: var(--green-dark);
  text-decoration: none;
  font-weight: 600;
  background: #fff;
}

.btn-outline:hover {
  background: var(--green-light);
}

.form-hint {
  margin: 10px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

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

.link-card {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}

.link-card h3 {
  margin: 0 0 8px;
}

.link-card p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.text-link {
  color: var(--green-dark);
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner p {
  margin: 4px 0;
}

.hidden {
  display: none !important;
}

@media (max-width: 800px) {
  .hero-grid,
  .feature-grid,
  .links-grid,
  .support-layout {
    grid-template-columns: 1fr;
  }

  .header-nav {
    display: none;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-visual {
    order: -1;
  }
}