:root {
  --ink: #0d1c16;
  --paper: #f4ead4;
  --gold: #d9b66c;
  --gold-deep: #a67c3d;
  --jade: #6e927a;
  --serif: "Songti SC", "Noto Serif SC", "STSong", serif;
  --sans: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { background: #0a1510; color: var(--paper); font-family: var(--sans); overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.grain {
  position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: .06;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}
.bg {
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(73, 112, 88, .25), transparent 46%),
    radial-gradient(ellipse at 12% 38%, rgba(151, 107, 53, .12), transparent 35%),
    linear-gradient(180deg, #101f18, #08120d 76%);
}
.bg:after {
  content: ""; position: absolute; inset: auto 0 0; height: 32vh;
  background: linear-gradient(transparent, rgba(2, 8, 5, .8));
}
.top {
  position: relative; z-index: 5; max-width: 1120px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; padding: 22px 28px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.seal { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid rgba(235, 207, 151, .55); border-radius: 50%; color: #f0d28e; font-family: var(--serif); font-size: 21px; }
.brand > span:last-child { display: flex; flex-direction: column; gap: 3px; }
.brand b { font-family: var(--serif); font-weight: 500; font-size: 16px; letter-spacing: .08em; }
.brand em { font-style: normal; color: rgba(238, 222, 191, .55); font-size: 14px; letter-spacing: .04em; }
.back { color: rgba(242, 225, 192, .75); font-size: 14px; padding: 8px 12px; border: 1px solid rgba(232, 208, 160, .22); border-radius: 999px; }
.back:hover { border-color: rgba(238, 207, 144, .55); color: #f8e9c9; }
.wrap { position: relative; z-index: 5; width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 6vh 0 40px; }
.hero { max-width: 760px; }
.hero h1 { margin: 8px 0 0; font-family: var(--serif); font-size: clamp(40px, 5.4vw, 68px); font-weight: 500; line-height: 1.12; letter-spacing: .04em; }
.hero h1 em { font-style: normal; color: #e1c17f; }
.platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; align-items: stretch; }
.platform {
  position: relative; padding: 22px; border-radius: 7px; overflow: hidden;
  display: flex; flex-direction: column;
  border: 1px solid rgba(239, 217, 177, .23);
  background: linear-gradient(135deg, rgba(35, 57, 43, .93), rgba(20, 36, 28, .94));
  box-shadow: 0 24px 65px rgba(0, 0, 0, .3);
}
.platform:before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse at 80% 0%, rgba(222, 183, 103, .1), transparent 45%); }
.platform.harmony { background: linear-gradient(135deg, rgba(39, 53, 43, .94), rgba(24, 33, 27, .95)); }
.app-icon { position: relative; width: 76px; height: 76px; border-radius: 18px; display: block; margin: 0 0 16px; box-shadow: 0 10px 26px rgba(0, 0, 0, .28); border: 1px solid rgba(255, 255, 255, .14); }
.platform h2 { position: relative; margin: 0 0 16px; font-family: var(--serif); font-size: 26px; font-weight: 500; letter-spacing: .06em; }
.qr-box {
  position: relative; width: 196px; height: 196px; margin: 0 0 14px; padding: 8px;
  background: #f5ead4; border-radius: 8px;
}
.qr-box img { display: block; width: 100%; height: 100%; object-fit: contain; }
.qr-note { position: relative; margin: 0; color: rgba(235, 223, 199, .7); font-size: 15px; }
.qr-pick { position: relative; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.qr-pick .ip {
  border: 1px solid rgba(237, 217, 182, .28); background: transparent; color: rgba(241, 225, 196, .75);
  border-radius: 999px; padding: 4px 10px; font-size: 13px; cursor: pointer;
}
.qr-pick .ip.on { background: #9d4a37; border-color: #9d4a37; color: #fff0d5; }
.install { margin-top: auto; }
.install {
  position: relative; width: 100%; min-height: 48px; display: flex; justify-content: space-between; align-items: center;
  padding: 0 16px; border-radius: 7px; cursor: pointer;
  border: 1px solid rgba(242, 215, 160, .48);
  background: linear-gradient(135deg, #9e4b37, #773026);
  color: #fff1d5; font-size: 15px; letter-spacing: .06em; transition: .2s;
}
.install:hover { transform: translateY(-1px); background: linear-gradient(135deg, #b15842, #873629); }
.install span { color: #f4d28f; font-size: 18px; }
.hint { position: relative; min-height: 22px; margin: 10px 0 0; color: rgba(235, 220, 192, .55); font-size: 14px; line-height: 1.6; }
.foot { position: relative; z-index: 5; width: min(1120px, calc(100% - 48px)); margin: 28px auto 0; padding: 14px 0 24px; display: flex; justify-content: space-between; color: rgba(236, 222, 195, .3); font-size: 14px; border-top: 1px solid rgba(232, 210, 171, .1); }
@media (max-width: 760px) {
  .top { padding: 16px 16px; }
  .brand em { display: none; }
  .wrap { width: calc(100% - 28px); padding-top: 3vh; }
  .hero h1 { font-size: 40px; }
  .platforms { grid-template-columns: 1fr; gap: 12px; margin-top: 24px; }
  .platform { padding: 18px; }
  .app-icon { width: 66px; height: 66px; margin: 4px 0 12px; }
  .platform h2 { font-size: 24px; }
  .foot { width: calc(100% - 28px); flex-direction: column; gap: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *:before, *:after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}