:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #4da3ff;
  --mim: #f7a55a;
  --nim: #69cf8a;
  --kim: #b18dff;
  --sim: #9fb7d1;
  --vim: #6aa8ff;
  --radius: 16px;
  --shadow: 0 6px 24px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(8px);
  background: rgba(255,255,255,0.6);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.brand-mark { font-weight: 700; font-size: 20px; color: var(--text); }
.brand-sub { font-size: 13px; color: var(--muted); }

.nav { display: flex; align-items: center; }
.nav-toggle { display: none; border: none; background: transparent; font-size: 22px; }
.nav-list { display: flex; align-items: center; gap: 16px; list-style: none; padding: 0; margin: 0; }
.nav-list a { text-decoration: none; color: var(--text); padding: 8px 10px; border-radius: 10px; }
.nav-list a:hover { background: rgba(0,0,0,0.06); }
.nav-list .avatar { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: rgba(0,0,0,0.06); }

.hero { padding: 64px 0; }
.hero-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.hero-text h1 { margin: 0 0 12px; font-size: 40px; line-height: 1.15; }
.hero-text .sub { margin: 0 0 24px; color: var(--muted); font-size: 16px; }
.cta { display: flex; gap: 12px; }
.btn { display: inline-block; padding: 12px 18px; border-radius: 14px; text-decoration: none; font-weight: 600; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { color: var(--text); background: #fff; box-shadow: var(--shadow); }

.hero-visual { display: flex; justify-content: center; }
.icon-cloud { display: grid; grid-template-columns: repeat(3, 84px); gap: 16px; }
.icon { width: 84px; height: 84px; border-radius: 22px; display: inline-flex; align-items: center; justify-content: center; box-shadow: var(--shadow); background: #fff; }
.i-home { background: linear-gradient(135deg, var(--primary), #8ec6ff); }
.i-grid { background: linear-gradient(135deg, var(--mim), #ffd3a8); }
.i-bolt { background: linear-gradient(135deg, var(--nim), #b9f1cd); }
.i-book { background: linear-gradient(135deg, var(--sim), #cfe0ee); }
.i-game { background: linear-gradient(135deg, var(--kim), #dccfff); }
.i-star { background: linear-gradient(135deg, var(--vim), #b9d7ff); }

.apps { padding: 24px 0 64px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.section-head h2 { margin: 0; font-size: 28px; }
.search { width: 280px; max-width: 50vw; padding: 10px 14px; border-radius: 12px; border: 1px solid rgba(0,0,0,0.1); background: #fff; }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 18px; }
.grid-featured { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.card-top { display: flex; align-items: center; gap: 12px; }
.card-icon { width: 56px; height: 56px; border-radius: 16px; display: inline-flex; align-items: center; justify-content: center; color: #fff; }
.card-title { font-weight: 700; }
.card-sub { font-size: 12px; color: var(--muted); }
.card-desc { font-size: 14px; color: var(--text); }
.card-tags { display: flex; gap: 8px; }
.tag { font-size: 12px; color: var(--muted); background: rgba(0,0,0,0.06); padding: 4px 8px; border-radius: 10px; }
.card-actions { display: flex; justify-content: space-between; align-items: center; }
.enter { text-decoration: none; font-weight: 600; color: var(--primary); }
.badge { font-size: 12px; color: var(--muted); }

.site-footer { border-top: 1px solid rgba(0,0,0,0.06); background: #fff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.links a { margin-left: 14px; color: var(--muted); text-decoration: none; }

@media (max-width: 1199px) {
  .hero-inner { grid-template-columns: 1fr; }
  .icon-cloud { grid-template-columns: repeat(6, 64px); }
  .icon { width: 64px; height: 64px; border-radius: 18px; }
}

@media (max-width: 767px) {
  .header-inner { height: 56px; }
  .nav-toggle { display: inline-block; }
  .nav-list { position: fixed; right: 16px; top: 64px; background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); box-shadow: var(--shadow); padding: 12px; border-radius: 16px; flex-direction: column; align-items: flex-start; gap: 8px; display: none; }
  .nav-list.show { display: flex; }
  .hero { padding: 40px 0; }
  .hero-text h1 { font-size: 28px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 420px) {
  .grid { grid-template-columns: 1fr; }
  .search { width: 100%; max-width: none; }
}