:root {
  --ink: #111827;
  --ink-soft: #374151;
  --paper: #fffaf7;
  --panel: #ffffff;
  --line: #f1e4df;
  --accent: #ff4d6d;
  --accent-dark: #e11d48;
  --mint: #14b8a6;
  --sky: #0ea5e9;
  --shadow: 0 12px 40px rgba(17, 24, 39, 0.08);
  --radius: 18px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --bar-h: 72px;
  --font-display: "ZCOOL KuaiLe", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(255, 77, 109, 0.16), transparent 55%),
    radial-gradient(900px 420px at 100% 0%, rgba(14, 165, 233, 0.12), transparent 50%),
    linear-gradient(180deg, #fff7f4 0%, var(--paper) 40%, #ffffff 100%);
  line-height: 1.7;
  padding-bottom: calc(var(--bar-h) + var(--safe-bottom) + 18px);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(255, 250, 247, 0.88);
  border-bottom: 1px solid rgba(241, 228, 223, 0.9);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px 14px;
  justify-content: flex-end;
  max-width: min(62vw, 520px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  text-decoration: none;
  padding: 6px 0;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-dark);
}

.hero {
  padding: 28px 0 18px;
}

.hero-grid {
  display: grid;
  gap: 22px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--accent-dark);
  background: rgba(255, 77, 109, 0.1);
  border: 1px solid rgba(255, 77, 109, 0.18);
  border-radius: 999px;
  padding: 6px 12px;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 2.8rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero-lead {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.chip {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.cta-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 700;
  text-decoration: none !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-android {
  background: linear-gradient(135deg, #111827, #1f2937);
  color: #fff;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.22);
}

.btn-ios {
  background: linear-gradient(135deg, var(--accent), #fb7185);
  color: #fff;
  box-shadow: 0 10px 24px rgba(225, 29, 72, 0.28);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #fb7185);
  color: #fff;
}

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.hero-visual {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  min-height: 280px;
  background:
    linear-gradient(160deg, rgba(17, 24, 39, 0.08), transparent 40%),
    linear-gradient(135deg, #ffe4e6, #e0f2fe 55%, #ccfbf1);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.phone-mock {
  width: min(220px, 62%);
  margin: 36px auto 0;
  background: var(--ink);
  border-radius: 28px;
  padding: 12px;
  box-shadow: 0 20px 50px rgba(17, 24, 39, 0.28);
  animation: floaty 4.5s ease-in-out infinite;
}

.phone-screen {
  background: linear-gradient(180deg, #fff 0%, #fff1f2 100%);
  border-radius: 20px;
  padding: 16px 14px 20px;
  min-height: 280px;
}

.phone-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.phone-top img {
  width: 36px;
  height: 36px;
}

.phone-top strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.comic-strip {
  display: grid;
  gap: 8px;
}

.comic-strip span {
  display: block;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(90deg, #fecdd3, #bae6fd);
}

.comic-strip span:nth-child(2) {
  background: linear-gradient(90deg, #a7f3d0, #fde68a);
  width: 88%;
}

.comic-strip span:nth-child(3) {
  background: linear-gradient(90deg, #ddd6fe, #fda4af);
  width: 76%;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: 0.55;
  animation: pulse 5s ease-in-out infinite;
}

.blob-1 {
  width: 90px;
  height: 90px;
  background: #fda4af;
  top: 18px;
  left: 18px;
}

.blob-2 {
  width: 70px;
  height: 70px;
  background: #7dd3fc;
  right: 20px;
  bottom: 40px;
  animation-delay: 1.2s;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.45; }
  50% { transform: scale(1.08); opacity: 0.7; }
}

.section {
  padding: 28px 0;
}

.section-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 1.85rem);
}

.section-desc {
  margin: 0 0 18px;
  color: var(--ink-soft);
}

.cards {
  display: grid;
  gap: 14px;
}

.feature {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  font-size: 1.2rem;
  background: rgba(255, 77, 109, 0.1);
}

.feature:nth-child(2) .feature-icon { background: rgba(14, 165, 233, 0.12); }
.feature:nth-child(3) .feature-icon { background: rgba(20, 184, 166, 0.12); }
.feature:nth-child(4) .feature-icon { background: rgba(245, 158, 11, 0.14); }

.steps {
  counter-reset: step;
  display: grid;
  gap: 12px;
}

.step {
  position: relative;
  padding: 16px 16px 16px 62px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.content-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
}

.content-block h2,
.content-block h3 {
  font-family: var(--font-display);
}

.content-block p,
.content-block li {
  color: var(--ink-soft);
}

.content-block ul {
  padding-left: 1.15rem;
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-cloud a {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  text-decoration: none;
}

.keyword-cloud a:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.faq details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq p {
  margin: 10px 0 0;
  color: var(--ink-soft);
}

.site-footer {
  margin-top: 20px;
  padding: 28px 0 20px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.footer-grid {
  display: grid;
  gap: 18px;
}

.site-footer h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.site-footer p,
.site-footer li,
.site-footer a {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.friend-links a {
  color: var(--ink);
  font-weight: 600;
}

.friend-links + p a {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.copyright {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 0.84rem;
  color: #6b7280;
}

.float-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  padding: 10px 12px calc(10px + var(--safe-bottom));
  background: rgba(17, 24, 39, 0.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 -8px 30px rgba(17, 24, 39, 0.18);
  transform: translateY(110%);
  transition: transform 0.28s ease;
}

.float-bar.show {
  transform: translateY(0);
}

.float-inner {
  width: min(1080px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.float-bar .btn {
  min-height: 48px;
  font-size: 0.95rem;
}

.breadcrumb {
  padding: 14px 0 0;
  font-size: 0.88rem;
  color: #6b7280;
}

.breadcrumb a {
  color: #6b7280;
}

.page-hero {
  padding: 10px 0 8px;
}

.page-hero h1 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5.5vw, 2.4rem);
  line-height: 1.3;
}

.table-wrap {
  overflow-x: auto;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
}

.info-table th,
.info-table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  font-size: 0.94rem;
}

.info-table th {
  background: #fff1f2;
  width: 34%;
  color: var(--ink);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 36px;
  }

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

  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .cta-group {
    max-width: 460px;
  }

  .float-inner {
    grid-template-columns: 1fr 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (max-width: 520px) {
  .nav {
    min-height: 58px;
  }

  .brand span {
    font-size: 1.15rem;
  }

  .nav-links {
    max-width: 58vw;
    gap: 8px 12px;
  }

  .nav-links a {
    font-size: 0.84rem;
  }

  .cta-group {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 18px;
  }
}