* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #2b2a2e;
  background: linear-gradient(180deg, #fff7f5 0%, #fffaf3 30%, #fffdf8 100%);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* nav */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(10px);
  background: rgba(255,252,249,0.85);
  border-bottom: 1px solid rgba(230,215,210,0.5);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px; font-weight: 700;
  font-size: 18px; color: #c84b4b;
}
.brand .logo-badge {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg,#ff8a7a,#e45757);
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:16px; box-shadow: 0 6px 14px rgba(228,87,87,0.28);
}
.nav-links { display: flex; gap: 24px; font-size: 15px; color: #6b5a5a; flex-wrap: wrap; }
.nav-links a {
  padding: 6px 2px; border-bottom: 2px solid transparent; transition: .2s ease;
}
.nav-links a:hover, .nav-links a.active {
  color: #c84b4b; border-bottom-color: #e45757;
}

/* Hero */
.hero { padding: 72px 0 48px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero h1 {
  font-size: 40px; line-height: 1.25; letter-spacing: 1px;
  color:#2d2a33;
}
.hero h1 .accent {
  background: linear-gradient(120deg,#ff6f61,#ff9a7e);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub {
  margin-top: 16px; font-size: 16px; color: #6a5a5a; max-width: 520px;
}
.btn-row { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 14px; font-size: 15px; font-weight: 600;
  transition: transform .2s ease, box-shadow .2s ease; cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg,#ff7f6f,#e45757); color:#fff;
  box-shadow: 0 10px 24px rgba(228,87,87,0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(228,87,87,0.36); }
.btn-ghost { background: #fff; color:#c84b4b; border: 1px solid #f2c3bb; }
.btn-ghost:hover { background: #fff4f2; transform: translateY(-2px); }
.hero-preview {
  position: relative; min-height: 360px; display:flex; align-items:center; justify-content:center;
}
.phone {
  width: 260px; height: 520px; border-radius: 40px;
  background: linear-gradient(160deg,#ffe8e1,#fff1ea);
  border: 10px solid #2b2a2e; padding: 10px; position: relative;
  box-shadow: 0 30px 60px rgba(200,80,80,0.22);
}
.phone::before{
  content:""; position:absolute; top:26px; left:50%; transform:translateX(-50%);
  width:74px; height:18px; background:#2b2a2e; border-radius:12px;
}
.phone-screen{
  width:100%; height:100%; border-radius: 28px;
  background: linear-gradient(160deg,#fff4ef,#fffaf6);
  padding: 44px 16px 16px; overflow:hidden;
  display:flex; flex-direction:column; gap:10px;
}
.phone-screen .p-line {
  height: 10px; background:#ffd8cc; border-radius: 6px;
}
.phone-screen .p-line.s { width:70%; }
.phone-screen .p-line.m { width:85%; }
.phone-screen .card-mini {
  background:#fff; border-radius:14px; padding:10px; box-shadow: 0 4px 14px rgba(200,120,120,0.12);
}
.decor-blob {
  position:absolute; border-radius:50%; filter:blur(2px);
  background: radial-gradient(circle at 30% 30%, #ffb3a3, transparent 60%);
  z-index:-1;
}
.d1{ width:260px; height:260px; top:-40px; right:-40px; opacity:.6;}
.d2{ width:180px; height:180px; bottom:-40px; left:-30px; opacity:.5;
     background: radial-gradient(circle at 30% 30%, #c8e0ff, transparent 60%);}

/* sections */
.section { padding: 80px 0; }
.section-title {
  text-align:center; margin-bottom: 50px;
}
.section-title h2 {
  font-size: 32px; color:#2d2a33; letter-spacing: 1px;
}
.section-title .tiny {
  display:inline-block; margin-bottom: 10px;
  color:#c84b4b; font-size:13px; letter-spacing: 3px; font-weight:600;
}
.section-title p {
  color:#7a6a6a; margin-top: 10px; font-size:15px; max-width:640px; margin-left:auto; margin-right:auto;
}

.grid-cards {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  background:#fff; border-radius: 20px; padding: 26px 24px;
  box-shadow: 0 10px 28px rgba(200,130,110,0.08);
  transition: transform .28s ease, box-shadow .28s ease;
  border: 1px solid rgba(255,220,210,0.5);
}
.card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(200,130,110,0.14); }
.card .num {
  width: 42px; height: 42px; border-radius: 12px; display:inline-flex;
  align-items:center; justify-content:center; font-weight:800;
  color:#fff; margin-bottom: 14px;
}
.card h3 { font-size:18px; margin-bottom: 10px; color:#2d2a33; }
.card p { color:#6b5a5a; font-size:14.5px; line-height: 1.85; }

.num.n1{ background:linear-gradient(135deg,#ff8a7a,#e45757);}
.num.n2{ background:linear-gradient(135deg,#ffc77e,#f29a4e);}
.num.n3{ background:linear-gradient(135deg,#9ed8c7,#5fa88f);}
.num.n4{ background:linear-gradient(135deg,#c2b0ff,#8f76e4);}
.num.n5{ background:linear-gradient(135deg,#f9a8d8,#ec6aa9);}
.num.n6{ background:linear-gradient(135deg,#8fcfff,#4f8fe4);}

/* band */
.band {
  margin-top: 60px;
  padding: 42px 36px; border-radius: 24px;
  background: linear-gradient(120deg, #fff2ec 0%, #fff6de 55%, #f2f8ff 100%);
  border: 1px solid rgba(240,210,200,0.6);
}
.band h3 { font-size: 22px; color:#3b2d30; }
.band p { color:#6b5a5a; margin-top: 10px; }

/* list features */
.feat-list { display:grid; gap: 18px; margin-top: 30px; }
.feat-row {
  display:grid; grid-template-columns: 80px 1fr; gap: 18px; align-items:center;
  padding: 18px 20px; background:#fff; border-radius: 16px;
  box-shadow: 0 6px 18px rgba(200,130,110,0.06);
}
.feat-row .fnum {
  width: 54px; height: 54px; border-radius: 14px; display:flex; align-items:center;
  justify-content:center; font-weight:800; color:#fff;
}
.feat-row h4 { color:#2d2a33; font-size: 17px; }
.feat-row p { color:#6b5a5a; margin-top: 4px; font-size:14.5px; }

/* content page */
.tabs { display:flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.tab-btn {
  padding: 10px 18px; border-radius: 999px; border: 1px solid #f0cdc3;
  background:#fff; color:#c84b4b; font-size: 14px; cursor:pointer; font-weight:600;
}
.tab-btn.active { background: #e45757; color:#fff; border-color:#e45757; }

.article-card {
  display:grid; grid-template-columns: 120px 1fr; gap: 18px; align-items:start;
  padding: 20px; background:#fff; border-radius: 16px; margin-bottom: 16px;
  box-shadow: 0 6px 18px rgba(200,130,110,0.06);
}
.article-card .thumb {
  width:120px; height:80px; border-radius: 12px;
  background: linear-gradient(135deg,#ffd8cc,#fff1ea);
  display:flex; align-items:center; justify-content:center; color:#e45757; font-weight:700;
}
.article-card h4 { font-size: 16px; color:#2d2a33; margin-bottom:6px;}
.article-card p { font-size: 14px; color:#7a6a6a; line-height: 1.7;}

/* timeline */
.timeline { display:grid; gap: 22px; }
.tl {
  display:grid; grid-template-columns: 120px 1fr; gap: 20px;
  padding: 20px 22px; background:#fff; border-radius:16px;
  box-shadow: 0 6px 18px rgba(200,130,110,0.06);
}
.tl .year { color:#e45757; font-weight:800; font-size: 18px;}
.tl h4 { color:#2d2a33; margin-bottom: 6px;}
.tl p { color:#6b5a5a; font-size:14.5px; line-height: 1.8;}

/* about */
.info-grid {
  display:grid; gap: 20px; margin-top: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.info-card {
  padding: 26px 24px; background:#fff; border-radius: 20px;
  box-shadow: 0 10px 28px rgba(200,130,110,0.08);
}
.info-card h4 { color:#c84b4b; font-size: 15px; margin-bottom: 10px; letter-spacing: 2px;}
.info-card p, .info-card li { color:#5b4c4c; font-size:14.5px; line-height: 1.85;}
.info-card ul { padding-left: 18px; }
.info-card li { margin-bottom: 4px; }

/* FAQ */
.faq { margin-top: 40px; }
.faq .q { font-weight:700; color:#2d2a33; margin-bottom: 6px; }
.faq .a { color:#6b5a5a; margin-bottom: 20px; font-size:14.5px; line-height:1.85;}

/* download page */
.dl-grid {
  display:grid; gap: 24px;
  grid-template-columns: 1fr 1fr; margin-top: 30px;
}
.dl-card {
  padding: 36px 30px; background:#fff; border-radius: 22px; text-align:center;
  box-shadow: 0 10px 30px rgba(200,130,110,0.08);
  border:1px solid rgba(255,220,210,0.6);
}
.dl-card .os {
  font-size: 20px; font-weight: 800; color:#2d2a33; margin-bottom: 8px;
}
.dl-card .os span { font-size: 13px; color:#a38b8b; font-weight: 500; margin-left: 6px;}
.dl-card .ver { color:#e45757; font-size: 14px; margin-bottom: 16px;}
.dl-card button {
  border: none; outline: none; font-family: inherit;
  padding: 13px 28px; border-radius: 14px; font-size: 15px; font-weight: 700;
  background: linear-gradient(135deg,#ff7f6f,#e45757); color:#fff;
  box-shadow: 0 10px 24px rgba(228,87,87,0.28); cursor:pointer;
  transition: transform .2s ease;
}
.dl-card button:hover { transform: translateY(-2px); }
.dl-card .tip { margin-top: 16px; color:#7a6a6a; font-size:13.5px; }

.changelog {
  margin-top: 40px; background:#fff; padding: 28px 30px; border-radius: 22px;
  box-shadow: 0 10px 30px rgba(200,130,110,0.08);
}
.changelog h3 { color:#2d2a33; margin-bottom: 16px; }
.cl-row { padding: 14px 0; border-bottom: 1px dashed rgba(230,190,180,0.6); }
.cl-row:last-child { border-bottom:none; }
.cl-row .v { font-weight: 700; color:#e45757; margin-right: 8px;}
.cl-row .d { color:#a38b8b; font-size: 13px; margin-left: 6px;}
.cl-row ul { margin-top: 6px; padding-left: 18px; color:#5b4c4c; font-size: 14.5px;}
.cl-row li { margin-bottom: 2px; }

.safety {
  margin-top: 30px; display:grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
}
.safe-card {
  background:#fff; padding: 20px; border-radius: 16px; text-align:center;
  box-shadow: 0 6px 18px rgba(200,130,110,0.06);
}
.safe-card h4 { color:#2d2a33; margin: 10px 0 6px;}
.safe-card p { color:#6b5a5a; font-size:13.5px; }

/* long content block */
.article-block {
  margin-top: 50px; background:#fff; border-radius: 24px; padding: 42px 40px;
  box-shadow: 0 10px 34px rgba(200,130,110,0.08);
}
.article-block h2 {
  font-size: 24px; color:#2d2a33; margin-bottom: 18px; letter-spacing: 1px;
}
.article-block h3 {
  font-size: 18px; color:#c84b4b; margin: 26px 0 10px;
}
.article-block p {
  color:#5b4c4c; font-size: 15px; line-height: 1.95; text-align: justify;
  margin-bottom: 14px;
}
.article-block ul { margin: 10px 0 14px 24px; color:#5b4c4c; }
.article-block li { margin-bottom: 6px; font-size:15px; line-height: 1.85;}

/* footer */
.site-footer {
  margin-top: 80px; padding: 50px 0 30px;
  background: linear-gradient(180deg, #fff7f3 0%, #ffe8e0 100%);
  border-top: 1px solid rgba(230,200,190,0.5);
}
.footer-grid {
  display:grid; gap: 30px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.footer-col h4 {
  color:#c84b4b; font-size: 14px; letter-spacing: 2px; margin-bottom: 14px;
}
.footer-col a, .footer-col p, .footer-col li {
  display:block; color:#6b5a5a; font-size: 14px; line-height: 1.9;
}
.footer-col a:hover { color:#e45757; }
.footer-col ul { list-style:none; }
.copyright {
  text-align:center; margin-top: 40px; padding-top: 20px;
  color:#9a8383; font-size: 13px; border-top: 1px dashed rgba(200,160,150,0.5);
}

/* scroll animations */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease;}
.reveal.in { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
  .hero { padding: 48px 0 32px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 30px; line-height: 1.3; }
  .nav-links { gap: 14px; font-size: 14px; }
  .section { padding: 56px 0; }
  .section-title h2 { font-size: 26px; }
  .dl-grid { grid-template-columns: 1fr; }
  .feat-row { grid-template-columns: 64px 1fr; }
  .article-block { padding: 28px 22px; }
  .tl { grid-template-columns: 80px 1fr; }
  .article-card { grid-template-columns: 90px 1fr; }
  .article-card .thumb { width:90px; height:64px; }
  .phone { width: 220px; height: 440px; }
}