:root {
  --teal: #3f8573;
  --teal-d: #285a4c;
  --teal-l: #c9dcd4;
  --ink: #161d1a;
  --muted: #6e7a74;
  --paper: #ecebe6;
  --max: 1100px;
  --foot-min: 1180px;
  --r: 8px;
  --sh: 0 4px 14px rgba(22, 29, 26, 0.1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    repeating-linear-gradient(0deg, rgba(110, 122, 116, 0.05) 0 2px, transparent 2px 28px),
    var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.75;
}
img { max-width: 100%; height: auto; border: 0; vertical-align: middle; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }
ul { margin: 0; padding: 0; list-style: none; }

.serif { font-family: "Songti SC", "STSong", "SimSun", serif; }

.wrap { width: var(--max); max-width: calc(100% - 40px); margin: 0 auto; position: relative; z-index: 1; }
.kicker { font-size: 12px; letter-spacing: 0.18em; color: var(--teal-d); }
.h2 { margin: 8px 0 18px; font-size: 28px; font-weight: 700; font-family: "Songti SC", "STSong", "SimSun", serif; }
.lead { max-width: 640px; color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 0;
  border-radius: var(--r);
  background: var(--teal-d);
  color: #fff;
  cursor: pointer;
  box-shadow: var(--sh);
}
.btn-ghost { background: #fff; color: var(--ink); }
.btn-hot { background: var(--teal); box-shadow: 0 0 0 2px var(--ink), var(--sh); }

.index-top { position: absolute; top: 0; left: 0; z-index: 40; width: 100%; }
.top-inner {
  width: var(--max);
  max-width: calc(100% - 40px);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 64px;
}
.logo img { width: 118px; display: block; }
.nav-main { display: flex; align-items: center; gap: 16px; flex: 1; justify-content: center; font-size: 13px; }
.nav-main > li { position: relative; }
.mega {
  display: none;
  position: absolute;
  top: 130%;
  left: 50%;
  transform: translateX(-50%);
  width: 540px;
  padding: 18px;
  background: rgba(255,255,255,0.97);
  z-index: 50;
  grid-template-columns: 1.2fr 1fr;
  gap: 12px;
  border-radius: var(--r);
  box-shadow: var(--sh);
}
.has-mega:hover .mega, .has-mega:focus-within .mega { display: grid; }
.mega h4 { margin: 0 0 8px; font-size: 12px; }
.mega a { display: block; padding: 4px 0; color: var(--muted); }
.top-cta { display: flex; gap: 10px; align-items: center; font-size: 12px; }
.top-cta .btn { min-height: 34px; padding: 0 14px; }

.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 0 60px;
  overflow: hidden;
  background: linear-gradient(180deg, #d4e0da, #c2d2ca);
}
.globe { position: absolute; left: 50%; top: 12%; width: 720px; height: 720px; margin-left: -360px; opacity: 0.15; z-index: 1; }
.spin { transform-origin: 200px 200px; animation: spin 50s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hero-mask { position: absolute; inset: 0; z-index: 2; background: radial-gradient(ellipse at 50% 40%, rgba(236,235,230,0.05), rgba(40,90,76,0.18)); }
.hero-inner { position: relative; z-index: 3; }
.hero-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.float-banner { display: inline-block; margin-bottom: 14px; padding: 6px 14px; border-radius: var(--r); background: #fff; color: var(--ink); font-size: 12px; box-shadow: var(--sh); }
.hero h1 { margin: 0 0 8px; font-size: 48px; font-weight: 700; line-height: 1.2; font-family: "Songti SC", serif; }
.hero .sub { margin: 0 0 20px; font-size: 17px; color: var(--teal-d); }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.demo {
  background: #fff; border-radius: var(--r); box-shadow: var(--sh);
  padding: 18px; display: grid; gap: 10px;
}
.demo .m { max-width: 86%; padding: 10px 12px; border-radius: 12px; font-size: 13px; }
.demo .in { justify-self: end; background: var(--teal-d); color: #fff; }
.demo .out { justify-self: start; background: #f0f4f1; color: var(--muted); }

.section { padding: 80px 0; position: relative; z-index: 1; }
.sell-row { overflow: hidden; margin-left: -6.88%; }
.sell-item { float: left; width: 18.11%; margin-left: 6.88%; text-align: center; }
.illust { width: 200px; height: 176px; margin: 0 auto 12px; object-fit: cover; display: block; background: #c9dcd4; border-radius: var(--r); box-shadow: var(--sh); }
.sell-item h3 { margin: 0 0 6px; font-size: 16px; }
.sell-item p { margin: 0; text-align: left; color: var(--muted); font-size: 13px; }

.timeline { position: relative; max-width: 720px; margin: 0 auto; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 4px; bottom: 4px; width: 2px; background: var(--teal-l); }
.tl-item { position: relative; padding: 0 0 22px 16px; }
.tl-item::before {
  content: ""; position: absolute; left: -26px; top: 8px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 3px var(--teal-l);
}
.tl-item strong { display: block; font-family: "Songti SC", serif; font-size: 17px; }
.tl-item span { color: var(--muted); font-size: 14px; }
.tl-shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.tl-shots img { width: 100%; height: 120px; object-fit: cover; border-radius: var(--r); box-shadow: var(--sh); }

.icon-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.icon-cell { padding: 16px 14px; min-height: 112px; border-radius: var(--r); background: #fff; box-shadow: var(--sh); }
.icon-cell strong { display: block; margin-bottom: 6px; }
.icon-cell span { color: var(--muted); font-size: 13px; }
.more-box { display: none; margin-top: 10px; }
.more-box.is-on { display: grid; }
.fold-btn { display: block; margin: 20px auto 0; background: #fff; border: 0; cursor: pointer; color: var(--teal-d); padding: 8px 18px; border-radius: var(--r); box-shadow: var(--sh); }
.oa-banner { width: 100%; max-width: 460px; margin: 0 0 22px; background: #2a5a4a; border-radius: var(--r); }

.spark-card { padding: 18px; border-radius: var(--r); background: #fff; box-shadow: var(--sh); }
.spark-card h3 { margin: 0 0 6px; font-family: "Songti SC", serif; }
.spark-card .num { font-size: 26px; font-weight: 800; color: var(--teal-d); }
.spark { width: 100%; height: 56px; margin-top: 10px; }
.spark polyline { fill: none; stroke: var(--teal); stroke-width: 2.5; }

.vid-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.vid { position: relative; border-radius: var(--r); overflow: hidden; background: #1d2a25; box-shadow: var(--sh); }
.vid img { width: 100%; height: 150px; object-fit: cover; opacity: 0.9; display: block; }
.vid .play {
  position: absolute; left: 50%; top: 40%; transform: translate(-50%,-50%);
  width: 44px; height: 44px; border-radius: 50%;
  color: #fff; display: flex; align-items: center; justify-content: center; background: rgba(40,90,76,0.6);
}
.vid figcaption { margin: 0; padding: 8px 10px; font-size: 12px; color: #fff; background: rgba(22,29,26,0.9); }

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.card { padding: 22px; min-height: 160px; border-radius: var(--r); background: #fff; box-shadow: var(--sh); }
.card.private { border-radius: 16px; border: 1px solid rgba(22,29,26,0.12); box-shadow: none; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.tile-shot { width: 100%; height: 128px; object-fit: cover; object-position: top; margin-top: 12px; border-radius: var(--r); }

.marquee { overflow: hidden; padding: 12px 0; }
.track { display: flex; gap: 10px; width: max-content; animation: marquee 90s linear infinite; }
.quote-card { flex: 0 0 228px; padding: 16px; background: #fff; font-size: 13px; color: var(--muted); border-radius: var(--r); box-shadow: var(--sh); }
.quote-card strong { display: block; margin-top: 10px; color: var(--ink); font-size: 12px; }
@keyframes marquee { to { transform: translateX(-50%); } }

.price-3 { display: grid; grid-template-columns: 1fr 1.08fr 1fr; gap: 12px; align-items: stretch; }
.price-tier { padding: 22px 18px; text-align: center; background: #fff; border-radius: var(--r); box-shadow: var(--sh); }
.price-tier.is-hot { background: #eaf2ee; transform: scale(1.04); box-shadow: 0 0 0 2px var(--teal-d), var(--sh); }
.price-tier h3 { margin: 0 0 8px; font-family: "Songti SC", serif; }
.price-tier p { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.platforms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 18px; }
.plat { text-align: center; padding: 14px 8px; border-radius: var(--r); background: #fff; box-shadow: var(--sh); }

.faq-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.faq-tabs button { border: 0; border-radius: var(--r); background: #fff; padding: 9px 18px; cursor: pointer; box-shadow: var(--sh); }
.faq-tabs button.is-on { background: var(--teal-d); color: #fff; }
.acc { border-radius: var(--r); box-shadow: var(--sh); overflow: hidden; margin-bottom: 10px; background: #fff; }
.acc-btn {
  width: 100%; text-align: left; padding: 15px 18px; border: 0; background: transparent;
  cursor: pointer; font-size: 15px; font-weight: 700; display: flex; justify-content: space-between;
}
.acc-panel { display: none; padding: 0 18px 16px; color: var(--muted); }
.acc.is-on .acc-panel { display: block; }
.acc[data-cat].is-hide { display: none; }

.article { max-width: 740px; }
.article p { margin: 0 0 16px; color: var(--muted); }
.article h2 { margin: 26px 0 10px; font-size: 22px; font-family: "Songti SC", serif; }
.crumbs { padding: 88px 0 0; font-size: 12px; color: var(--muted); }
.page-hero { padding: 18px 0 36px; }
.page-hero h1 { margin: 8px 0 12px; font-size: 32px; font-family: "Songti SC", serif; }
body.sub .index-top { position: relative; background: rgba(236,235,230,0.95); }
body.sub .crumbs { padding-top: 12px; }

.site-foot { background: #f7f8f8; min-width: var(--foot-min); padding: 40px 0 24px; color: #6a6560; text-align: center; }
.foot-inner { width: var(--foot-min); max-width: calc(100% - 40px); margin: 0 auto; }
.foot-logo { width: 140px; margin: 0 auto 12px; display: block; }
.foot-nav { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 16px; text-align: left; }
.foot-nav h4 { margin: 0 0 8px; color: var(--ink); font-size: 13px; }
.foot-nav a { display: block; padding: 3px 0; font-size: 13px; }
.legal { font-size: 12px; color: #828282; max-width: 820px; margin: 0 auto; }

@media (max-width: 1180px) { .site-foot, .foot-inner { min-width: 0; width: 100%; } }
@media (max-width: 930px) {
  .hero h1 { font-size: 32px; }
  .hero-duo, .cards-3, .price-3, .vid-grid, .tl-shots { grid-template-columns: 1fr; }
  .sell-item { width: 43%; margin-bottom: 22px; }
  .icon-grid, .platforms { grid-template-columns: 1fr 1fr; }
  .price-tier.is-hot { transform: none; }
  .foot-nav { flex-wrap: wrap; }
}
@media (max-width: 770px) {
  .nav-main, .top-cta .link { display: none; }
  .sell-item { width: 100%; margin-left: 0; }
  .sell-row { margin-left: 0; }
}