/* WhatsApp Web 在线同步 — app-store product */
:root {
  --ink: #2a2140;
  --purple: #5B4B8A;
  --lavender: #E8E4F4;
  --mint: #25D366;
  --mint-deep: #1da851;
  --white: #ffffff;
  --card: #ffffff;
  --line: #d8d2ea;
  --muted: #6b6284;
  --shadow: 0 18px 40px rgba(91, 75, 138, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 10% -10%, #f4f1fb 0%, transparent 60%),
    linear-gradient(180deg, #f7f5fb 0%, var(--white) 38%, var(--lavender) 100%);
  line-height: 1.75;
}

a { color: var(--purple); }
img { max-width: 100%; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--purple);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(160deg, var(--purple), #7d6bb0);
  display: grid;
  place-items: center;
  box-shadow: 0 8px 16px rgba(91, 75, 138, 0.25);
}
.brand-mark svg { width: 20px; height: 20px; fill: #fff; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  justify-content: flex-end;
}
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.nav a:hover { color: var(--purple); }

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 36px;
}
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--lavender);
  color: var(--purple);
  font-size: 12px;
  font-weight: 700;
}
.pill.green { background: #e8faf0; color: #128c3e; }
h1 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.25;
  color: var(--purple);
  margin-bottom: 16px;
}
.lead p { margin-bottom: 12px; color: #3d3556; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 22px; }
.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--mint);
  color: #063518 !important;
  text-decoration: none;
  font-weight: 800;
  padding: 14px 26px;
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(37, 211, 102, 0.35);
}
.cta:hover { background: var(--mint-deep); color: #fff !important; }
.cta-note { font-size: 13px; color: var(--muted); }

.phone-stage { display: flex; justify-content: center; }
.phone {
  width: 280px;
  height: 540px;
  border-radius: 36px;
  background: #1c1630;
  padding: 12px;
  box-shadow: var(--shadow), inset 0 0 0 2px #3b3358;
  position: relative;
}
.phone::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 18px;
  background: #0d0a16;
  border-radius: 12px;
}
.phone-screen {
  height: 100%;
  border-radius: 28px;
  background: linear-gradient(180deg, #efeaf8, #fff);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.phone-bar {
  background: var(--purple);
  color: #fff;
  padding: 28px 14px 12px;
  font-size: 13px;
  font-weight: 700;
}
.phone-chat { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.bubble {
  max-width: 82%;
  padding: 9px 12px;
  border-radius: 16px;
  font-size: 12px;
  line-height: 1.55;
}
.bubble.in { background: #fff; box-shadow: 0 4px 10px rgba(91, 75, 138, 0.08); }
.bubble.out { background: #d9f8e4; align-self: flex-end; }
.phone-input {
  margin: 10px;
  height: 40px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
}

section { padding: 56px 0; }
h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--purple);
  margin-bottom: 14px;
}
h3 { font-size: 20px; color: #3d3163; margin-bottom: 10px; }
.section-lead { max-width: 720px; margin-bottom: 22px; color: #4a425f; }

.tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.tile {
  background: var(--card);
  border-radius: 32px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid #efeaf8;
  min-height: 210px;
}
.tile-icon {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: var(--lavender);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.tile-icon svg { width: 26px; height: 26px; fill: var(--purple); }
.tile h3 { margin-bottom: 8px; }
.tile p { color: var(--muted); font-size: 15px; }
.tile ul { margin: 10px 0 0 18px; color: #4b4460; }

.benefits {
  background: #fff;
  border-radius: 32px;
  padding: 36px;
  box-shadow: var(--shadow);
}
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 18px;
}
.benefit {
  background: var(--lavender);
  border-radius: 24px;
  padding: 20px;
}
.benefit strong { display: block; margin-bottom: 8px; color: var(--purple); }

.step-chips {
  display: flex;
  gap: 14px;
  overflow: auto;
  padding-bottom: 8px;
}
.step-chip {
  flex: 1 0 220px;
  background: #fff;
  border-radius: 32px;
  padding: 22px;
  box-shadow: var(--shadow);
  position: relative;
}
.step-num {
  display: inline-flex;
  min-width: 36px;
  height: 28px;
  border-radius: 999px;
  background: var(--mint);
  color: #063518;
  font-weight: 800;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 10px;
}

.cards-3, .cards-2 {
  display: grid;
  gap: 18px;
}
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-2 { grid-template-columns: 1fr 1fr; }
.card {
  background: #fff;
  border-radius: 32px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 8px; }
.limit-box {
  margin-top: 18px;
  border-radius: 32px;
  background: #fff8e8;
  border: 1px solid #f0ddb0;
  padding: 22px 26px;
}
.limit-box ul { margin-left: 18px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 32px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--purple); color: #fff; font-weight: 700; }
tr:last-child td { border-bottom: 0; }

.browser-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.browser-item {
  background: #fff;
  border-radius: 28px;
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow);
}
.browser-item strong { display: block; margin: 8px 0 4px; color: var(--purple); }

details {
  background: #fff;
  border-radius: 24px;
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: 0 8px 20px rgba(91, 75, 138, 0.08);
}
summary { cursor: pointer; font-weight: 700; color: var(--purple); }
details p { margin-top: 10px; color: #4a425f; }

.site-footer {
  background: var(--purple);
  color: #efeaf8;
  padding: 36px 0 28px;
  margin-top: 20px;
}
.site-footer p { margin-bottom: 10px; font-size: 14px; }
.foot-brand { font-weight: 800; color: #fff; margin-bottom: 14px; }

@media (max-width: 900px) {
  .hero, .tiles, .benefit-grid, .cards-3, .cards-2, .browser-list { grid-template-columns: 1fr; }
  .nav { display: none; }
  .phone { width: 240px; height: 460px; }
}

.news-app { padding: 28px 0 8px; }
.news-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.news-tiles article { background: #fff; border-radius: 32px; padding: 20px; box-shadow: 0 10px 30px rgba(91,75,138,0.08); }
.news-tiles time { font-size: 12px; color: #5b4b8a; font-weight: 700; }
.news-tiles h3 { margin: 8px 0; }
@media (max-width: 800px) { .news-tiles { grid-template-columns: 1fr; } }