:root {
  --sky: #d9f0ff;
  --sky-2: #fff4e4;
  --ink: #243246;
  --muted: #5b6b80;
  --card: #fff;
  --red: #ff5d73;
  --gold: #f5b942;
  --blue: #4aa3ff;
  --green: #3dcc7a;
  --purple: #8b74ff;
  --shadow: 0 18px 50px rgba(70, 110, 150, 0.16);
  --r: 28px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 480px at 8% -10%, #fff 0%, transparent 55%),
    radial-gradient(700px 420px at 100% 8%, #ffe8b8 0%, transparent 50%),
    linear-gradient(180deg, var(--sky) 0%, #f7fbff 38%, var(--sky-2) 100%);
  line-height: 1.65;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}
.nav-inner {
  display: flex; align-items: center; gap: 20px;
  height: 68px;
}
.brand { display: flex; align-items: center; }
.brand img { width: 52px; height: 52px; border-radius: 14px; object-fit: cover; box-shadow: 0 6px 16px rgba(74, 163, 255, 0.25); }
.nav-links { display: flex; gap: 22px; margin-left: auto; color: var(--muted); font-weight: 600; font-size: 15px; }
.nav-links a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 20px; border-radius: 999px;
  font-weight: 700; font-size: 14px; border: 0; cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-red { background: var(--red); color: #fff; box-shadow: 0 10px 22px rgba(255, 93, 115, 0.32); }
.btn-ghost { background: #fff; color: var(--ink); box-shadow: 0 8px 20px rgba(36, 50, 70, 0.08); }
.nav .btn { margin-left: 8px; }
.menu-btn {
  display: none; margin-left: auto; width: 42px; height: 42px;
  border: 0; border-radius: 12px; background: #fff; font-size: 20px; cursor: pointer;
}

.hero { padding: 56px 0 28px; }
.hero-grid {
  display: grid; grid-template-columns: 0.92fr 1.08fr;
  gap: 40px; align-items: center;
}
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border-radius: 999px; padding: 6px 14px;
  font-size: 13px; font-weight: 700; color: #4a6a88;
  box-shadow: 0 8px 20px rgba(74, 163, 255, 0.12);
  margin-bottom: 16px;
}
.pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.18; letter-spacing: -0.03em; margin-bottom: 16px;
}
.hero h1 em { font-style: normal; color: var(--blue); }
.hero p { color: var(--muted); font-size: 17px; max-width: 38em; margin-bottom: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.stats { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 28px; color: var(--muted); font-size: 13px; }
.stats b { display: block; color: var(--ink); font-size: 22px; line-height: 1.2; }

.hero-shot {
  position: relative;
  border-radius: 32px;
  padding: 10px;
  background: linear-gradient(180deg, #fff, #eef7ff);
  box-shadow: var(--shadow);
  transform: rotate(-1.4deg);
}
.hero-shot::before,
.hero-shot::after {
  content: ""; position: absolute; border-radius: 50%;
  z-index: -1; filter: blur(2px);
}
.hero-shot::before { width: 140px; height: 140px; background: #ffd36a; top: -28px; right: 40px; opacity: .7; }
.hero-shot::after { width: 90px; height: 90px; background: #8fd4ff; bottom: 20px; left: -24px; opacity: .8; }
.hero-shot img { border-radius: 24px; }

.sec { padding: 72px 0 20px; }
.sec-head { text-align: center; margin-bottom: 36px; }
.sec-head span { color: var(--blue); font-weight: 800; font-size: 13px; letter-spacing: .18em; }
.sec-head h2 { font-size: 34px; margin: 8px 0 10px; letter-spacing: -0.03em; }
.sec-head p { color: var(--muted); }

.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.mode {
  background: var(--card); border-radius: var(--r); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .25s ease;
}
.mode:hover { transform: translateY(-6px); }
.mode figure { aspect-ratio: 16/10; overflow: hidden; background: #eef6ff; }
.mode img { width: 100%; height: 100%; object-fit: cover; }
.mode-body { padding: 20px 22px 22px; }
.tag { display: inline-block; font-size: 12px; font-weight: 800; padding: 4px 10px; border-radius: 999px; margin-bottom: 10px; }
.tag-red { background: #ffe5ea; color: #d63c55; }
.tag-blue { background: #e4f1ff; color: #2676d6; }
.tag-green { background: #e3f8ec; color: #1c9a52; }
.mode h3 { font-size: 20px; margin-bottom: 8px; }
.mode p { color: var(--muted); font-size: 14px; }

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px; }
.feat {
  background: #fff; border-radius: 22px; padding: 22px 18px;
  box-shadow: 0 10px 28px rgba(70, 110, 150, 0.1);
}
.feat b { display: block; font-size: 28px; margin-bottom: 8px; }
.feat h3 { font-size: 16px; margin-bottom: 6px; }
.feat p { color: var(--muted); font-size: 13px; }

.about {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center;
  background: #fff; border-radius: 36px; padding: 36px;
  box-shadow: var(--shadow);
}
.about h2 { font-size: 30px; margin: 8px 0 14px; }
.about p { color: var(--muted); margin-bottom: 12px; }
.about-meta { display: grid; gap: 8px; margin-top: 18px; font-size: 14px; color: #3d5168; }
.about-shot { border-radius: 24px; overflow: hidden; box-shadow: 0 16px 36px rgba(36, 50, 70, 0.14); }
.about-shot img { width: 100%; }

.cta {
  margin: 56px 0 20px; text-align: center; color: #fff;
  background: linear-gradient(135deg, #4aa3ff, #8b74ff 55%, #ff7b8f);
  border-radius: 36px; padding: 48px 24px;
  box-shadow: 0 22px 50px rgba(74, 163, 255, 0.28);
}
.cta h2 { font-size: 32px; margin-bottom: 10px; }
.cta p { opacity: .92; margin-bottom: 22px; }
.cta .btn-ghost { color: #3a4d68; }

.foot {
  padding: 36px 0 28px; color: #6a7b90; font-size: 13px;
}
.foot-links { display: flex; flex-wrap: wrap; gap: 14px 20px; margin-bottom: 10px; }
.foot-links a:hover { color: var(--ink); }
.beian { color: #4a6a88; }

@media (max-width: 900px) {
  .hero-grid, .modes, .features, .about { grid-template-columns: 1fr; }
  .hero { padding-top: 28px; }
  .hero-shot { transform: none; }
  .nav-links, .nav .btn { display: none; }
  .nav.is-open .nav-links {
    display: flex; flex-direction: column; position: absolute;
    left: 0; right: 0; top: 68px; background: #fff; padding: 16px 20px 20px;
    box-shadow: 0 16px 30px rgba(36, 50, 70, 0.1);
  }
  .nav.is-open .btn { display: inline-flex; margin: 8px 20px 16px auto; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; }
  .about { padding: 22px; }
}