:root {
  --page-bg: #f5f7fb;
  --page-panel: #ffffff;
  --page-panel-alt: #eef3f9;
  --page-text: #121a28;
  --page-muted: #5e6b7e;
  --page-border: #dce4ef;
  --page-blue: #1769e0;
  --page-blue-soft: #e8f1ff;
  --page-green: #16845b;
  --page-shadow: 0 22px 60px rgba(35, 55, 85, 0.1);
}

html[data-theme="dark"] {
  --page-bg: #0b1018;
  --page-panel: #121b29;
  --page-panel-alt: #0f1723;
  --page-text: #f4f7fb;
  --page-muted: #a6b2c4;
  --page-border: #28364a;
  --page-blue: #5595ff;
  --page-blue-soft: #17335e;
  --page-green: #49c895;
  --page-shadow: 0 22px 60px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.marketing-page {
  margin: 0;
  color: var(--page-text);
  background: var(--page-bg);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
.marketing-main { width: 100%; overflow: hidden; }
.marketing-hero {
  position: relative;
  padding: 112px max(24px, 5vw) 86px;
  text-align: center;
  background: radial-gradient(circle at 50% 0, color-mix(in srgb, var(--page-blue) 18%, transparent), transparent 44%);
}
.marketing-hero-inner, .marketing-section-inner { width: min(1120px, 100%); margin: 0 auto; }
.marketing-kicker {
  display: inline-flex;
  margin-bottom: 20px;
  padding: 7px 12px;
  color: var(--page-blue);
  border: 1px solid color-mix(in srgb, var(--page-blue) 35%, transparent);
  border-radius: 999px;
  background: var(--page-blue-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}
.marketing-hero h1 { max-width: 880px; margin: 0 auto 20px; font-size: clamp(38px, 6vw, 68px); line-height: 1.08; letter-spacing: -.05em; }
.marketing-hero p { max-width: 760px; margin: 0 auto; color: var(--page-muted); font-size: clamp(16px, 2vw, 19px); line-height: 1.85; }
.marketing-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.marketing-button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  color: #fff;
  border: 1px solid var(--page-blue);
  border-radius: 12px;
  background: var(--page-blue);
  text-decoration: none;
  font-weight: 800;
}
.marketing-button.secondary { color: var(--page-text); border-color: var(--page-border); background: var(--page-panel); }
.marketing-section { padding: 82px max(24px, 5vw); }
.marketing-section.alt { background: var(--page-panel-alt); }
.marketing-section-head { max-width: 720px; margin: 0 0 38px; }
.marketing-section-head.center { margin-right: auto; margin-left: auto; text-align: center; }
.marketing-section-head h2 { margin: 0 0 13px; font-size: clamp(30px, 4vw, 46px); letter-spacing: -.035em; }
.marketing-section-head p { margin: 0; color: var(--page-muted); font-size: 16px; line-height: 1.8; }
.marketing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.marketing-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.marketing-card {
  padding: 28px;
  border: 1px solid var(--page-border);
  border-radius: 20px;
  background: var(--page-panel);
  box-shadow: var(--page-shadow);
}
.marketing-card-index { display: inline-grid; width: 34px; height: 34px; place-items: center; color: var(--page-blue); border-radius: 10px; background: var(--page-blue-soft); font-size: 12px; font-weight: 900; }
.marketing-card h3 { margin: 17px 0 10px; font-size: 21px; }
.marketing-card p, .marketing-card li { color: var(--page-muted); font-size: 14px; line-height: 1.8; }
.marketing-card ul { margin: 12px 0 0; padding-left: 20px; }
.offer-panel { display: grid; grid-template-columns: 1.15fr .85fr; gap: 20px; align-items: stretch; }
.offer-price { padding: clamp(30px, 5vw, 54px); border: 1px solid var(--page-border); border-radius: 24px; background: var(--page-panel); box-shadow: var(--page-shadow); }
.offer-badge { color: var(--page-blue); font-size: 13px; font-weight: 800; }
.offer-current { display: block; margin: 12px 0 4px; font-size: clamp(52px, 8vw, 82px); font-weight: 900; letter-spacing: -.06em; }
.offer-original { color: var(--page-muted); text-decoration: line-through; }
.offer-status { display: inline-flex; margin-top: 18px; color: var(--page-blue); font-size: 12px; font-weight: 800; }
.offer-list { display: grid; gap: 12px; margin: 24px 0; padding: 0; list-style: none; }
.offer-list li { padding: 14px 16px; color: var(--page-muted); border: 1px solid var(--page-border); border-radius: 12px; background: var(--page-panel); }
.support-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.support-link { padding: 22px; color: var(--page-text); border: 1px solid var(--page-border); border-radius: 16px; background: var(--page-panel); text-decoration: none; }
.support-link b { display: block; margin-bottom: 7px; }
.support-link span { color: var(--page-muted); font-size: 13px; line-height: 1.6; }
.public-faq-list { display: grid; gap: 10px; }
.public-faq-item { border: 1px solid var(--page-border); border-radius: 14px; background: var(--page-panel); }
.public-faq-item summary { padding: 18px 20px; cursor: pointer; font-weight: 800; }
.public-faq-item p { margin: 0; padding: 0 20px 20px; color: var(--page-muted); line-height: 1.8; }
.operator-box { display: flex; justify-content: space-between; gap: 30px; padding: 26px; border-left: 4px solid var(--page-blue); border-radius: 0 16px 16px 0; background: var(--page-panel); }
.operator-box p { margin: 0; color: var(--page-muted); line-height: 1.8; }
.notice { color: var(--page-muted); font-size: 13px; line-height: 1.8; }
.product-unavailable { padding: 42px; text-align: center; border: 1px solid var(--page-border); border-radius: 20px; background: var(--page-panel); }
.product-unavailable p { margin: 0 0 18px; color: var(--page-muted); }
.product-flow-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.product-flow-grid .marketing-card { padding: 22px; }
.product-flow-grid .marketing-card h3 { font-size: 18px; }
.product-screen-list { display: grid; gap: 24px; }
.product-screen-card { margin: 0; overflow: hidden; border: 1px solid var(--page-border); border-radius: 22px; background: var(--page-panel); box-shadow: var(--page-shadow); }
.product-screen-card img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #0d1016; }
.product-screen-card figcaption { display: flex; gap: 16px; align-items: baseline; justify-content: space-between; padding: 20px 24px 22px; }
.product-screen-card figcaption b { flex: none; font-size: 18px; }
.product-screen-card figcaption span { color: var(--page-muted); font-size: 14px; line-height: 1.7; text-align: right; }
.product-mode-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, .7fr); gap: 28px; align-items: start; }
.product-mode-layout .marketing-section-head { margin-bottom: 28px; }
.product-mode-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product-mode-grid .marketing-card { padding: 22px; box-shadow: none; }
.product-mode-grid .marketing-card h3 { margin-top: 0; font-size: 18px; }
.product-requirements { padding: 28px; border: 1px solid var(--page-border); border-radius: 20px; background: var(--page-panel); box-shadow: var(--page-shadow); }
.product-requirements h3 { margin: 0 0 16px; font-size: 21px; }
.product-requirements ul { display: grid; gap: 13px; margin: 0; padding-left: 20px; }
.product-requirements li { color: var(--page-muted); font-size: 14px; line-height: 1.75; }
.product-final-cta { text-align: center; }
.product-final-cta h2 { margin: 0 0 12px; font-size: clamp(30px, 4vw, 46px); letter-spacing: -.035em; }
.product-final-cta p { margin: 0; color: var(--page-muted); font-size: 16px; line-height: 1.8; }

@media (max-width: 820px) {
  .marketing-grid.three, .offer-panel { grid-template-columns: 1fr; }
  .support-links { grid-template-columns: 1fr; }
  .product-flow-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-mode-layout { grid-template-columns: 1fr; }
  .product-mode-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .marketing-hero { padding-top: 84px; }
  .marketing-section { padding-top: 62px; padding-bottom: 62px; }
  .marketing-grid { grid-template-columns: 1fr; }
  .marketing-actions { flex-direction: column; }
  .marketing-button { width: 100%; }
  .operator-box { flex-direction: column; }
  .product-flow-grid, .product-mode-grid { grid-template-columns: 1fr; }
  .product-screen-card { border-radius: 16px; }
  .product-screen-card figcaption { align-items: flex-start; flex-direction: column; gap: 7px; padding: 17px 18px 19px; }
  .product-screen-card figcaption span { text-align: left; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }