:root {
  --paper: #f6f5f1;
  --ink: #182733;
  --muted: #65717a;
  --blue: #2455ee;
  --line: #dcded9;
  --night: #132b39;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
h1, h2, h3, p, figure { margin: 0; }
a:focus-visible, button:focus-visible { outline: 3px solid #5984ff; outline-offset: 6px; }
.wrap { width: calc(100% - 96px); max-width: 1880px; margin-inline: auto; }
.skip-link { position: fixed; left: 20px; top: -80px; z-index: 30; background: white; padding: 12px; }
.skip-link:focus { top: 12px; }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; height: 94px; }
.brand { display: inline-flex; flex-shrink: 0; }
.brand img { width: 154px; height: 36px; object-fit: contain; }
.nav-inner nav { display: flex; gap: 40px; font-size: 14px; }
.nav-inner nav a { transition: color .18s; }
.nav-inner nav a:hover, .text-link:hover { color: var(--blue); }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 36px; min-height: 54px; padding: 13px 26px; border-radius: 8px; background: var(--blue); color: white; font-weight: 600; font-size: 15px; transition: background .18s, transform .18s; }
.button:hover { background: #1643cd; transform: translateY(-2px); }
.button-small { min-height: 44px; padding: 10px 20px; font-size: 13px; gap: 24px; }
.text-link { display: inline-flex; align-items: center; gap: 14px; font-size: 14px; font-weight: 550; }
.hero { display: grid; grid-template-columns: 1fr 1.05fr; align-items: center; gap: 5%; padding-block: 76px 70px; }
.eyebrow { color: var(--blue); font-size: 14px; font-weight: 550; letter-spacing: 1px; }
h1 { font-size: clamp(44px, 4.15vw, 82px); line-height: 1.25; letter-spacing: -2px; font-weight: 650; margin-top: 24px; }
h1 span { color: var(--blue); }
.hero-description { color: var(--muted); font-size: clamp(15px, 1.2vw, 20px); line-height: 1.9; margin-top: 25px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 28px; margin-top: 34px; }
.creative-visual { position: relative; border-radius: 18px; overflow: hidden; background: #e9e5dc; }
.creative-visual > img { display: block; width: 100%; height: auto; }
.creative-visual figcaption { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 22px; background: #eae7df; font-size: 14px; }
.creative-visual figcaption small { color: #68706e; font-size: 11px; }
.collection { display: grid; grid-template-columns: 1.35fr repeat(3, 1fr); align-items: center; padding-block: 27px 30px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.collection h2 { font-size: 21px; letter-spacing: -.5px; font-weight: 600; }
.collection-copy p { color: var(--muted); font-size: 13px; margin-top: 6px; }
.source-platform { display: flex; flex-direction: column; align-items: center; gap: 10px; border-left: 1px solid var(--line); }
.source-platform img { display: block; width: 104px; height: 38px; object-fit: contain; }
.source-platform .logo-pdd { width: 108px; }
.source-platform span { color: var(--muted); font-size: 12px; }
.source-platform i { font-style: normal; margin-left: 8px; }
.source-platform:hover span { color: var(--blue); }
.capabilities { padding-block: 66px 64px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 37px; }
.section-heading h2 { font-size: 31px; line-height: 1.4; letter-spacing: -1px; font-weight: 600; }
.capability-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.capability-grid article { padding: 0 27px; border-left: 1px solid var(--line); }
.capability-grid article:first-child { border-left: 0; padding-left: 0; }
.capability-grid article:last-child { padding-right: 0; }
.feature-icon { width: 34px; height: 34px; color: var(--blue); display: block; margin-bottom: 19px; }
.capability-grid h3 { font-size: 22px; font-weight: 600; letter-spacing: -.5px; }
.capability-grid p { font-size: 14px; color: var(--muted); margin-top: 13px; line-height: 1.85; }
.capability-grid p br { display: none; }
.capability-grid a { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 12px; margin-top: 23px; }
.capability-grid a:hover { color: var(--blue); }
.tracking-panel { background: var(--night); color: #f3f6f5; padding: 46px 52px 23px; border-radius: 18px; }
.tracking-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 35px; }
.tracking .eyebrow { color: #a7cbd5; font-size: 12px; margin-bottom: 14px; }
.tracking h2 { font-size: clamp(29px, 2.6vw, 44px); line-height: 1.4; letter-spacing: -.8px; font-weight: 550; }
.tracking-heading > p { color: #acc0ca; font-size: 14px; line-height: 1.9; }
.tracking-flow { display: flex; position: relative; margin-top: 38px; }
.tracking-flow::before { content: ""; position: absolute; top: 17px; left: 10%; right: 10%; height: 1px; background: #547582; }
.tracking-flow button { display: flex; flex: 1; align-items: center; flex-direction: column; gap: 12px; border: 0; background: transparent; color: #b0c4ce; cursor: pointer; padding: 0 4px 8px; font-size: 14px; }
.stage-point { width: 35px; height: 35px; display: grid; place-items: center; border: 1px solid #78939e; border-radius: 50%; background: var(--night); position: relative; font-size: 16px; transition: background .18s, color .18s; }
.tracking-flow button[aria-selected="true"] { color: white; }
.tracking-flow button[aria-selected="true"] .stage-point { background: #c4e6e6; color: #153b47; border-color: #c4e6e6; box-shadow: 0 0 0 5px #c4e6e612; }
.tracking-flow button:hover .stage-point { border-color: white; }
.tracking-bottom { display: flex; justify-content: space-between; align-items: center; gap: 30px; margin-top: 24px; padding: 24px 0; border-top: 1px solid #34515e; }
.stage-detail strong { font-size: 18px; font-weight: 550; }
.stage-detail p { font-size: 13px; margin-top: 6px; color: #acc0ca; }
.evidence { display: flex; gap: 30px; }
.evidence span { display: flex; align-items: center; gap: 10px; color: #c7dcdf; font-size: 14px; white-space: nowrap; }
.evidence svg { width: 25px; height: 25px; }
.tracking-foot { border-top: 1px solid #34515e; padding-top: 17px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.tracking-foot small { font-size: 10px; color: #91aab6; }
.tracking-foot a { font-size: 12px; color: #c4e6e6; }
.closing { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 52px; }
.closing h2 { font-size: 30px; letter-spacing: -.8px; font-weight: 550; }
.closing > div { display: flex; align-items: center; gap: 30px; }
.site-footer { display: flex; align-items: center; gap: 28px; border-top: 1px solid var(--line); padding-block: 24px; color: var(--muted); font-size: 11px; }
.site-footer a:nth-child(3) { margin-left: auto; }
@media (min-width: 2000px) {
  .hero { padding-block: 86px 78px; }
  .nav-inner nav { font-size: 16px; }
  .collection h2 { font-size: 26px; }
  .collection-copy p, .source-platform span { font-size: 15px; }
  .source-platform img { width: 128px; height: 44px; }
  .source-platform .logo-pdd { width: 128px; }
  .capability-grid p, .tracking-heading > p { font-size: 17px; }
  .capability-grid h3 { font-size: 27px; }
  .capability-grid a, .stage-detail p { font-size: 15px; }
  .section-heading h2 { font-size: 38px; }
}
@media (max-width: 1100px) {
  .wrap { width: calc(100% - 56px); }
  .hero { gap: 28px; padding-block: 55px; }
  h1 { font-size: 44px; letter-spacing: -1px; }
  .hero-description { font-size: 14px; }
  .hero-actions { gap: 18px; }
  .hero-actions .button { padding: 12px 20px; gap: 22px; }
  .collection { grid-template-columns: 1.4fr repeat(3, 1fr); }
  .collection h2 { font-size: 18px; }
  .collection-copy p { font-size: 11px; }
  .capability-grid article { padding-inline: 18px; }
  .capability-grid h3 { font-size: 19px; }
  .tracking-panel { padding: 34px 32px 22px; }
  .tracking-bottom { align-items: flex-start; }
  .evidence { gap: 12px; flex-direction: column; }
}
@media (max-width: 780px) {
  html { scroll-padding-top: 24px; }
  .wrap { width: calc(100% - 40px); }
  .nav-inner { height: auto; padding-block: 18px 15px; gap: 20px; flex-wrap: wrap; }
  .brand img { width: 132px; height: 31px; }
  .nav-inner .button { margin-left: auto; }
  .nav-inner nav { order: 3; width: 100%; justify-content: center; gap: 34px; font-size: 12px; }
  .hero { grid-template-columns: 1fr; padding-block: 42px 32px; gap: 32px; }
  h1 { font-size: clamp(35px, 7.8vw, 55px); margin-top: 18px; }
  .eyebrow { font-size: 12px; }
  .hero-description { margin-top: 20px; font-size: 14px; }
  .hero-actions { margin-top: 24px; gap: 24px; }
  .creative-visual { border-radius: 12px; }
  .creative-visual figcaption { padding: 12px 14px; font-size: 12px; }
  .creative-visual figcaption small { font-size: 10px; }
  .collection { grid-template-columns: repeat(3, minmax(0, 1fr)); padding-block: 26px; row-gap: 24px; }
  .collection-copy { grid-column: 1 / -1; text-align: center; }
  .collection-copy p { font-size: 12px; }
  .source-platform:nth-child(2) { border-left: 0; }
  .source-platform img, .source-platform .logo-pdd { width: 80px; height: 32px; }
  .source-platform span { font-size: 10px; }
  .source-platform i { display: none; }
  .capabilities { padding-block: 37px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 12px; margin-bottom: 27px; }
  .section-heading h2 { font-size: 25px; }
  .section-heading .text-link { font-size: 12px; }
  .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 20px; }
  .capability-grid article { border: 0; padding: 0; }
  .feature-icon { width: 29px; height: 29px; margin-bottom: 12px; }
  .capability-grid h3 { font-size: 18px; }
  .capability-grid p { font-size: 12px; margin-top: 10px; }
  .capability-grid a { font-size: 10px; gap: 2px; margin-top: 14px; }
  .tracking-panel { padding: 29px 22px 20px; border-radius: 12px; }
  .tracking-heading { display: block; }
  .tracking h2 { font-size: 28px; }
  .tracking-heading > p { font-size: 12px; margin-top: 17px; }
  .tracking-flow { margin-top: 28px; }
  .tracking-flow::before { top: 14px; }
  .stage-point { width: 29px; height: 29px; font-size: 13px; }
  .tracking-flow button { font-size: 10px; gap: 10px; }
  .tracking-bottom { flex-direction: column; gap: 22px; padding-block: 21px; margin-top: 17px; }
  .stage-detail strong { font-size: 16px; }
  .stage-detail p { font-size: 12px; min-height: 40px; }
  .evidence { flex-direction: row; flex-wrap: wrap; gap: 18px; }
  .evidence span { font-size: 11px; gap: 7px; }
  .evidence svg { width: 20px; height: 20px; }
  .tracking-foot { flex-direction: column; align-items: flex-start; gap: 12px; }
  .tracking-foot small { font-size: 9px; }
  .closing { padding-block: 35px; flex-direction: column; align-items: flex-start; }
  .closing h2 { font-size: 26px; }
  .closing > div { width: 100%; justify-content: space-between; gap: 20px; }
  .closing .button { min-height: 46px; padding: 11px 18px; gap: 22px; font-size: 13px; }
  .closing .text-link { font-size: 12px; }
  .site-footer { flex-wrap: wrap; gap: 12px 20px; font-size: 10px; padding-block: 20px; }
  .site-footer a:nth-child(3) { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .stage-point { transition: none; }
}