/* 字体与CSS变量 */
:root {
  --bg: #fff7fb;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #ff2d55;
  --primary-2: #f65b8a;
  --ring: rgba(255, 45, 85, 0.25);
  --shadow: 0 10px 30px rgba(31, 41, 55, 0.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Noto Sans SC', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

/* 顶部滚动进度条 */
.scroll-progress {
  position: fixed; left: 0; right: 0; top: 64px; height: 4px; z-index: 800;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  transform-origin: 0 50%; transform: scaleX(0);
}

/* 导航 */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 2000; background: rgba(255,255,255,0.85); backdrop-filter: saturate(150%) blur(8px); border-bottom: 1px solid rgba(0,0,0,0.06); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--text); font-weight:700; }
.brand-logo { font-size: 20px;  withd:24px; height:24px}
.brand-text { letter-spacing: 0.5px; }
.nav-links { display:flex; gap: 16px; align-items:center; }
.nav-links a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 10px; }
.nav-links a:hover { background: rgba(0,0,0,0.05); }
.btn { display:inline-flex; align-items:center; gap:8px; padding:10px 18px; border-radius: 14px; text-decoration:none; color: var(--text); box-shadow: var(--shadow); background:#fff; }
.btn.primary { background: linear-gradient(90deg, var(--primary), var(--primary-2)); color: #fff; }
.btn.ghost { background: transparent; box-shadow:none; border:1px solid rgba(0,0,0,0.08); }
.brand-tagline{font-size: 12px; color: var(--muted);}
/* 英雄区 */
.hero { position: relative; overflow: hidden; padding: 64px 0 40px; }
.hero-bg {
  position:absolute; inset:-10% -10% auto -10%; height: 60vh; min-height: 360px; z-index:-1;
  background:
    radial-gradient(1000px 420px at 20% 30%, rgba(255, 176, 200, 0.28), transparent 70%),
    radial-gradient(900px 380px at 70% 20%, rgba(248, 138, 158, 0.28), transparent 70%),
    linear-gradient(180deg, #fff0f5, transparent 40%);
  animation: blob 14s infinite alternate ease-in-out;
}
@keyframes blob {
  0% { transform: translateY(0) scale(1); filter: hue-rotate(0deg); }
  50% { transform: translateY(-8px) scale(1.02); filter: hue-rotate(6deg); }
  100% { transform: translateY(0) scale(1); filter: hue-rotate(0deg); }
}

.hero-content { text-align:center; }
.hero-title { font-size: clamp(28px, 4vw, 40px); margin: 6px 0 16px; }
.hero-sub { color: var(--muted); font-size: 16px; line-height: 1.7; width: min(820px, 92vw); margin: 0 auto 24px; }
.hero-actions { display:flex; gap: 14px; align-items:center; justify-content:center; margin-bottom: 26px; }

.devices { display:grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; align-items:end; justify-content:center; width:min(1000px, 94vw); margin: 24px auto 6px; }
.device { display:flex; align-items:center; justify-content:center; filter: drop-shadow(0 12px 30px rgba(31,41,55,0.12)); transition: transform .5s ease, filter .5s ease; }
.device img { width: 100%; border-radius: 30px;  }
.device.focus { transform: translateY(-6px) scale(1.04); }
.device:hover { transform: translateY(-8px) scale(1.03); filter: drop-shadow(0 18px 40px rgba(246,91,138,0.35)); }

/* 漂浮动画 */
.float-1 { animation: float 6s ease-in-out infinite; }
.float-2 { animation: float 8s ease-in-out infinite; }
.float-3 { animation: float 7s ease-in-out infinite; }
.float-4 { animation: float 9s ease-in-out infinite; }
.float-5 { animation: float 6.5s ease-in-out infinite; }
@keyframes float { 0%{ transform: translateY(0) } 50%{ transform: translateY(-10px) } 100%{ transform: translateY(0) } }

/* 通用区块 */
.section { padding: 70px 0; }
.section#benefits { background: #ffffff; }
.section.pastel { background: #FFF8FC; }
.section-title { text-align:center; font-size: 26px; margin:0 0 10px; }
.section-sub { text-align:center; color: var(--muted); width:min(760px, 92vw); margin:0 auto 26px; }

.cards { display:grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background:#fff; width: 100%; border-radius: 18px; box-shadow: var(--shadow); padding: 16px; transition: transform .35s ease, box-shadow .35s ease; }
.card img{width: 100%; border-radius: 12px; }
.card h3 { margin: 10px 0 6px; font-size: 18px; }
.card p { color: var(--muted); }
.hover-raise:hover { transform: translateY(-8px); box-shadow: 0 18px 50px rgba(246,91,138,0.25); }

.grid { display:grid; grid-template-columns: repeat(5, 1fr); gap: 16px; width: fit-content; margin: 0 auto; justify-items: center; }
.grid-item { background:#fff; border-radius: 18px; box-shadow: var(--shadow); padding: 16px; display:flex; flex-direction:column; align-items:center; justify-content:center; text-decoration:none; color: var(--text); gap: 12px; transition: transform .35s ease, box-shadow .35s ease; }
.grid-item img { width: 100%; max-width: 160px; border-radius: 12px; }
.grid-item span { font-weight: 600; }
.grid-item:hover { box-shadow: 0 18px 50px rgba(31,41,55,0.16); }

/* 倾斜动效（鼠标移动） */
.tilt { will-change: transform; perspective: 600px; }

/* 页脚 */
.footer { background:#fff; border-top: 1px solid rgba(0,0,0,0.06); padding-top: 48px; }
.footer-grid { display:grid; grid-template-columns: 1.3fr 1.3fr 1fr; gap: 18px; }
.footer-col h4 { margin: 0 0 10px; }
.footer-col ul { list-style:none; padding:0; margin:0; }
.footer-col li { margin: 8px 0; }
.footer-col a { color: var(--text); text-decoration:none; }
.footer-col a:hover { text-decoration: underline; }
.company-info { display:flex; flex-direction:column; gap: 2px; }
.company-info .item { font-size: 16px;  color: var(--muted); }
.brand-footer { color: var(--primary-2); }
.hotline-card { border: 1px dashed rgba(255,45,85,0.35); border-radius: 12px; padding: 12px 14px; display:flex; flex-direction:column; gap:6px; background: #fff0f5; }
.hotline .label { color: var(--muted); font-size: 12px; }
.hotline .phone { font-size: 20px; font-weight: 700; color: var(--primary); }
.hotline .time { color: var(--muted); font-size: 12px; }
.footer-bottom { display:flex; align-items:center; justify-content:space-between; padding: 18px 0 30px; }

/* 入场显现动画（IntersectionObserver控制） */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* 下载APP 模态框 */
.modal { position: fixed; inset: 0; display: none; z-index: 3000; }
.modal.is-open { display: block; }
.modal-backdrop { position:absolute; inset:0; background: rgba(17, 24, 39, 0.45); opacity: 0; animation: fadeIn .25s forwards; }
.modal-dialog { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%) scale(.92); width: min(680px, 92vw); background:#fff; border-radius: 18px; box-shadow: 0 30px 80px rgba(31,41,55,.35); padding: 22px; animation: popIn .28s cubic-bezier(.2,.8,.2,1.1) forwards; }
.modal-close { position:absolute; right: 12px; top: 8px; border:none; background:transparent; font-size: 26px; line-height: 1; cursor:pointer; color:#9ca3af; }
.modal-title { margin: 6px 0 6px; font-size: 22px; text-align:center; }
.modal-sub { text-align:center; color: var(--muted); margin: 0 0 16px; }
.qr-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items:start; justify-content:center; }
.qr-card { background:#fff; border:1px solid rgba(0,0,0,0.06); border-radius: 14px; padding: 14px; display:flex; flex-direction:column; gap: 10px; align-items:center; box-shadow: var(--shadow); }
.qr-card img { width: 180px; height: 180px; border-radius: 8px; }
.qr-meta { display:flex; flex-direction:column; align-items:center; gap: 6px; }
.qr-meta strong { font-size: 16px; }
.qr-meta span { color: var(--muted); font-size: 12px; }

@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
@keyframes popIn { from { transform: translate(-50%, -50%) scale(.92) } to { transform: translate(-50%, -50%) scale(1) } }

@media (max-width: 560px) {
  .modal-dialog { width: min(520px, 94vw); padding: 16px; }
  .qr-grid { grid-template-columns: 1fr; }
}

/* 响应式 */
@media (max-width: 980px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav { height: 58px; }
  .nav-links { gap: 8px; }
  .devices { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* 降级：减少动画时的体验优化 */
@media (prefers-reduced-motion: reduce) {
  .hero-bg, .float-1, .float-2, .float-3, .float-4, .float-5 { animation: none !important; }
  .reveal { transition: none; }
}

/* 固定导航占位，避免内容被覆盖 */
body { padding-top: 64px; }