:root {
  --blue: #2850e7;
  --blue-dark: #1739c6;
  --blue-soft: #edf1ff;
  --ink: #10162b;
  --text: #4d566f;
  --muted: #7b8499;
  --line: #dfe5f3;
  --paper: #f6f8fc;
  --white: #fff;
  --green: #28c894;
  --orange: #ffb45c;
  --shadow: 0 18px 55px rgba(34, 57, 137, .11);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 88% 4%, rgba(40, 80, 231, .12), transparent 28rem), var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, a, video { font: inherit; -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 100; padding: 10px 14px; color: #fff; background: var(--blue); border-radius: 10px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  max-width: 1240px;
  min-height: 76px;
  margin: 0 auto;
  padding: 13px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(246, 248, 252, .9);
  border-bottom: 1px solid rgba(223, 229, 243, .75);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 13px; font-weight: 900; box-shadow: 0 8px 20px rgba(40, 80, 231, .24); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 11px; }
nav { display: flex; align-items: center; gap: 25px; color: var(--text); font-size: 13px; }
nav a:hover { color: var(--blue); }
.nav-cta { padding: 10px 16px; color: #fff !important; background: var(--blue); border-radius: 999px; }

main, footer { max-width: 1240px; margin: 0 auto; }
.hero, .section, .contact-section { scroll-margin-top: 90px; }
.hero { min-height: 650px; padding: 70px 26px 54px; display: grid; grid-template-columns: 1.18fr .82fr; align-items: center; gap: 42px; }
.eyebrow, .section-kicker { color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; background: var(--blue-soft); border-radius: 999px; letter-spacing: .03em; text-transform: none; }
.status-dot { width: 8px; height: 8px; background: var(--green); border-radius: 50%; box-shadow: 0 0 0 5px rgba(40, 200, 148, .14); }
h1 { margin: 23px 0 18px; font-size: clamp(42px, 4.6vw, 64px); line-height: 1.08; letter-spacing: -.045em; }
h1 span { color: var(--blue); }
.hero-lead { max-width: 710px; margin: 0; color: var(--text); font-size: 17px; line-height: 1.82; }
.role-chips { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.role-chips span { padding: 7px 10px; color: var(--blue-dark); background: #fff; border: 1px solid #cfd8ff; border-radius: 999px; font-size: 11px; font-weight: 800; }
.hero-actions { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 10px; }
.button { min-height: 46px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid transparent; border-radius: 13px; cursor: pointer; font-size: 13px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(40, 80, 231, .24); }
.button.secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.hero-proof { margin-top: 34px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.hero-proof div { padding-right: 10px; border-right: 1px solid var(--line); }
.hero-proof div:last-child { border: 0; }
.hero-proof strong { display: block; color: var(--blue); font-size: 28px; line-height: 1; }
.hero-proof span { display: block; margin-top: 7px; color: var(--muted); font-size: 11px; }

.hero-panel { padding: 27px; color: #fff; background: var(--ink); border-radius: 28px; box-shadow: 0 28px 74px rgba(16, 22, 43, .19); overflow: hidden; position: relative; }
.hero-panel::before { content: ""; position: absolute; width: 230px; height: 230px; right: -95px; top: -95px; border: 48px solid rgba(74, 106, 255, .15); border-radius: 50%; }
.panel-head { position: relative; padding-bottom: 17px; display: flex; align-items: center; justify-content: space-between; gap: 10px; color: #9da9d5; border-bottom: 1px solid rgba(255,255,255,.13); font-size: 10px; letter-spacing: .1em; }
.live-pill { padding: 6px 8px; color: #b9f3dd; background: rgba(40, 200, 148, .1); border: 1px solid rgba(40, 200, 148, .24); border-radius: 999px; letter-spacing: 0; }
.hero-panel h2 { position: relative; margin: 23px 0 20px; font-size: 23px; letter-spacing: -.02em; }
.deal-flow { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.deal-flow div { padding: 14px; background: rgba(255,255,255,.065); border: 1px solid rgba(255,255,255,.1); border-radius: 14px; }
.deal-flow span, .deal-flow strong, .deal-flow small { display: block; }
.deal-flow span { color: #8198ff; font-size: 10px; font-weight: 900; }
.deal-flow strong { margin-top: 8px; font-size: 14px; }
.deal-flow small { margin-top: 5px; color: #9da7c8; font-size: 11px; }

.career-strip { margin: 0 26px 28px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 12px 35px rgba(34,57,137,.06); }
.career-strip > div { padding: 22px 24px; border-right: 1px solid var(--line); }
.career-strip > div:last-child { border: 0; }
.career-strip span { color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .08em; }
.career-strip strong { display: block; margin-top: 8px; font-size: 14px; }
.career-strip p { margin: 6px 0 0; color: var(--text); font-size: 11px; line-height: 1.55; }

.section { padding: 78px 26px; }
.section-heading { margin-bottom: 30px; display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.section-heading h2, .training-copy h2, .why-sales h2, .contact-copy h2 { margin: 9px 0 0; font-size: clamp(29px, 3.8vw, 45px); line-height: 1.18; letter-spacing: -.035em; }
.section-heading > p { max-width: 450px; margin: 0; color: var(--text); font-size: 14px; line-height: 1.7; }

.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.role-card { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 21px; box-shadow: 0 12px 35px rgba(34,57,137,.055); }
.role-index { width: 34px; height: 34px; display: grid; place-items: center; color: var(--blue); background: var(--blue-soft); border-radius: 10px; font-size: 11px; font-weight: 900; }
.role-card h3 { margin: 23px 0 12px; font-size: 21px; }
.role-card p { min-height: 72px; margin: 0; color: var(--text); font-size: 13px; line-height: 1.72; }
.role-card ul { margin: 20px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; }
.role-card li { position: relative; padding: 6px 0 6px 17px; color: var(--ink); font-size: 12px; }
.role-card li::before { content: ""; position: absolute; left: 0; top: 12px; width: 6px; height: 6px; background: var(--green); border-radius: 50%; }

.case-stack { display: grid; gap: 18px; }
.case-card { display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; border-radius: 25px; box-shadow: var(--shadow); }
.case-acquisition { color: #fff; background: var(--ink); }
.case-commerce { background: #fff; border: 1px solid var(--line); }
.case-summary { padding: 34px; }
.case-topline { display: flex; justify-content: space-between; color: #8fa2f8; font-size: 10px; font-weight: 900; letter-spacing: .1em; }
.case-card h3 { margin: 38px 0 13px; font-size: 30px; letter-spacing: -.025em; }
.case-card p { margin: 0; color: #aab3d1; font-size: 14px; line-height: 1.75; }
.case-commerce p { color: var(--text); }
.case-card a { margin-top: 27px; display: inline-flex; align-items: center; gap: 10px; color: #95a7ff; font-size: 12px; font-weight: 900; }
.case-commerce a { color: var(--blue); }
.case-evidence { padding: 24px; display: grid; gap: 10px; background: rgba(255,255,255,.065); }
.case-commerce .case-evidence { background: #f7f9ff; }
.case-evidence div { padding: 19px 21px; background: rgba(255,255,255,.065); border: 1px solid rgba(255,255,255,.1); border-radius: 15px; }
.case-commerce .case-evidence div { background: #fff; border-color: var(--line); }
.case-evidence small, .case-evidence strong { display: block; }
.case-evidence small { color: #8599f4; font-size: 10px; font-weight: 900; letter-spacing: .06em; }
.case-evidence strong { margin-top: 7px; color: #eef1ff; font-size: 13px; line-height: 1.65; }
.case-commerce .case-evidence strong { color: var(--ink); }

.runtime-proof-section { padding-top: 88px; }
.runtime-proof-grid { display: grid; grid-template-columns: 1.16fr .84fr; gap: 18px; }
.runtime-proof-card { margin: 0; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 14px 42px rgba(34,57,137,.075); }
.runtime-proof-main { grid-row: span 2; }
.proof-media { aspect-ratio: 1.24 / 1; display: grid; place-items: center; overflow: hidden; background: #07172e; border-bottom: 1px solid var(--line); }
.proof-media.compact { height: 220px; aspect-ratio: auto; background: #eef2f8; }
.proof-media img { width: 100%; height: 100%; display: block; object-fit: contain; object-position: top left; }
.proof-media.compact img { object-fit: cover; object-position: top left; }
.proof-media.terminal-crop img { width: 135%; max-width: none; height: auto; transform-origin: top left; }
.runtime-proof-card figcaption { padding: 23px 24px 25px; }
.runtime-proof-card figcaption > span { color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .1em; }
.runtime-proof-card h3 { margin: 9px 0 9px; font-size: 20px; line-height: 1.38; }
.runtime-proof-card p { margin: 0; color: var(--text); font-size: 12px; line-height: 1.72; }
.runtime-proof-main h3 { font-size: 25px; }
.migration-chain { margin-top: 18px; padding: 19px 22px; display: grid; grid-template-columns: repeat(7, auto); align-items: center; justify-content: space-between; gap: 14px; color: #fff; background: var(--ink); border-radius: 18px; }
.migration-chain div { min-width: 135px; }
.migration-chain span, .migration-chain strong { display: block; }
.migration-chain span { color: #8599f4; font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.migration-chain strong { margin-top: 6px; font-size: 12px; }
.migration-chain i { color: #6376d9; font-style: normal; font-weight: 900; }

.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.video-card { background: #fff; border: 1px solid var(--line); border-radius: 22px; overflow: hidden; box-shadow: 0 12px 38px rgba(34,57,137,.07); }
.video-card.featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1.38fr .62fr; }
.video-shell { position: relative; min-height: 260px; display: grid; place-items: center; background: linear-gradient(145deg, #10162b, #2441b7); overflow: hidden; }
.featured .video-shell { min-height: 390px; }
video { display: block; width: 100%; height: 100%; max-height: 490px; background: #0c1020; object-fit: contain; }
.video-start { position: absolute; z-index: 1; inset: 0 0 54px; padding: 0; cursor: pointer; background: transparent; border: 0; }
.video-start span { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); padding: 7px 12px; color: #fff; background: rgba(16,22,43,.74); border: 1px solid rgba(255,255,255,.2); border-radius: 999px; font-size: 11px; font-weight: 800; opacity: 0; transition: opacity .2s ease; }
.video-start:hover span, .video-start:focus-visible span { opacity: 1; }
.video-start[hidden] { display: none; }
.video-badge, .video-duration { position: absolute; top: 15px; z-index: 2; padding: 7px 10px; color: #fff; border-radius: 999px; font-size: 10px; font-weight: 900; backdrop-filter: blur(10px); }
.video-badge { left: 15px; background: rgba(40,80,231,.88); }
.video-duration { right: 15px; background: rgba(16,22,43,.72); }
.video-copy { padding: 24px; }
.featured .video-copy { display: flex; flex-direction: column; justify-content: center; padding: 34px; }
.video-no { color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.video-copy h3 { margin: 9px 0 9px; font-size: 21px; }
.video-copy p { margin: 0; color: var(--text); font-size: 13px; line-height: 1.7; }
.tag-row { margin-top: 17px; display: flex; gap: 7px; flex-wrap: wrap; }
.tag-row span { padding: 6px 9px; color: var(--blue-dark); background: var(--blue-soft); border-radius: 8px; font-size: 10px; font-weight: 800; }
.validation-strip { margin-top: 18px; padding: 21px 24px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 20px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.validation-score { min-width: 105px; padding-right: 20px; border-right: 1px solid var(--line); }
.validation-score strong, .validation-score span { display: block; }
.validation-score strong { color: var(--blue); font-size: 30px; }
.validation-score span { margin-top: 3px; color: var(--muted); font-size: 10px; }
.validation-strip > div:nth-child(2) > strong { font-size: 14px; }
.validation-strip p { margin: 5px 0 0; color: var(--text); font-size: 11px; line-height: 1.6; }
.safe-label { padding: 7px 10px; color: #127357; background: #e8fbf4; border-radius: 999px; font-size: 10px; font-weight: 900; }

.skill-section { padding-top: 90px; }
.evidence-summary { margin-bottom: 18px; padding: 20px 22px; display: grid; grid-template-columns: repeat(3, auto) 1fr; align-items: center; gap: 22px; color: #fff; background: var(--ink); border-radius: 18px; }
.evidence-summary div { padding-right: 22px; border-right: 1px solid rgba(255,255,255,.13); }
.evidence-summary strong, .evidence-summary span { display: block; }
.evidence-summary strong { color: #9aabff; font-size: 27px; }
.evidence-summary span { margin-top: 5px; color: #b8c0da; font-size: 10px; }
.evidence-summary p { margin: 0; color: #9ca6c7; font-size: 11px; line-height: 1.65; }
.skill-toolbar { padding: 15px; display: flex; align-items: center; justify-content: space-between; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.filter-row { display: flex; flex-wrap: wrap; gap: 7px; }
.filter-button { padding: 8px 11px; color: var(--text); background: var(--paper); border: 1px solid var(--line); border-radius: 999px; cursor: pointer; font-size: 10px; font-weight: 800; }
.filter-button.active { color: #fff; background: var(--blue); border-color: var(--blue); }
.skill-search { min-width: 220px; display: flex; align-items: center; gap: 8px; padding: 0 11px; color: var(--muted); background: var(--paper); border: 1px solid var(--line); border-radius: 10px; font-size: 10px; }
.skill-search input { width: 100%; height: 35px; color: var(--ink); background: transparent; border: 0; outline: 0; font-size: 11px; }
.skill-list-head { padding: 18px 2px 11px; display: flex; justify-content: space-between; color: var(--muted); font-size: 10px; }
.skill-list-head strong { color: var(--ink); font-size: 12px; }
.skill-catalog { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.evidence-card { min-height: 245px; padding: 22px; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: 18px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.evidence-card:hover { transform: translateY(-3px); border-color: #b9c5fb; box-shadow: 0 14px 32px rgba(40,80,231,.08); }
.evidence-card.hidden-card { display: none; }
.evidence-card-top { display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.category-pill { padding: 6px 8px; color: var(--blue-dark); background: var(--blue-soft); border-radius: 999px; font-size: 9px; font-weight: 900; }
.archive-pill { color: #168260; font-size: 9px; font-weight: 900; }
.evidence-card h3 { margin: 18px 0 9px; font-size: 17px; line-height: 1.4; }
.evidence-card p { margin: 0; color: var(--text); font-size: 11px; line-height: 1.7; }
.evidence-meta { margin-top: auto; padding-top: 17px; border-top: 1px solid var(--line); }
.evidence-meta span { display: block; color: var(--muted); font-size: 9px; line-height: 1.5; }
.evidence-meta code { display: inline-block; margin-top: 6px; color: #68728b; font: 9px ui-monospace, SFMono-Regular, Consolas, monospace; }
.evidence-demo { margin-top: 10px; display: inline-flex; color: var(--blue); font-size: 10px; font-weight: 900; }
.skill-actions { margin-top: 18px; display: flex; justify-content: center; }
.empty-state { grid-column: 1 / -1; padding: 40px; color: var(--muted); text-align: center; background: #fff; border: 1px dashed var(--line); border-radius: 18px; }

.training-section { padding-top: 35px; }
.training-card { padding: 45px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; color: #fff; background: linear-gradient(130deg, #1739c6, #2850e7 58%, #5573ef); border-radius: 28px; box-shadow: 0 24px 65px rgba(40,80,231,.22); }
.training-card .section-kicker { color: #c4ceff; }
.training-copy p { margin: 15px 0 0; color: #dfe5ff; font-size: 13px; line-height: 1.75; }
.training-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.training-grid div { padding: 19px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); border-radius: 15px; }
.training-grid span, .training-grid strong, .training-grid small { display: block; }
.training-grid span { color: #c4ceff; font-size: 9px; font-weight: 900; }
.training-grid strong { margin-top: 8px; font-size: 14px; }
.training-grid small { margin-top: 6px; color: #d9e0ff; font-size: 10px; line-height: 1.55; }

.why-sales-section { padding-top: 24px; }
.why-sales { padding: 36px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; background: #fff; border: 1px solid var(--line); border-radius: 24px; }
.why-points { display: grid; gap: 10px; }
.why-points p { margin: 0; padding: 17px 19px; color: var(--text); background: var(--paper); border-radius: 14px; font-size: 12px; line-height: 1.7; }
.why-points strong { color: var(--ink); }

.contact-section { margin: 62px 26px 26px; padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 34px; color: #fff; background: var(--ink); border-radius: 28px; }
.contact-copy .section-kicker { color: #94a7ff; }
.contact-copy h2 { max-width: 660px; }
.contact-copy p { margin: 13px 0 0; color: #9fa9ca; font-size: 12px; }
.contact-actions { min-width: 220px; display: flex; flex-direction: column; gap: 9px; }
.button.light { color: var(--ink); background: #fff; }
.button.outline-light { color: #fff; background: transparent; border-color: rgba(255,255,255,.25); }
footer { padding: 22px 26px 38px; display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }

.reveal { opacity: 0; transform: translateY(17px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1020px) {
  .hero { grid-template-columns: 1fr; }
  .hero-panel { max-width: 720px; }
  .career-strip { grid-template-columns: 1fr; }
  .career-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .career-strip > div:last-child { border-bottom: 0; }
  .role-grid, .skill-catalog { grid-template-columns: repeat(2, 1fr); }
  .runtime-proof-grid { grid-template-columns: 1fr; }
  .runtime-proof-main { grid-row: auto; }
  .evidence-summary { grid-template-columns: repeat(3, 1fr); }
  .evidence-summary p { grid-column: 1 / -1; }
  .training-card, .why-sales { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header { padding: 11px 17px; }
  nav a:not(.nav-cta) { display: none; }
  .hero, .section { padding-left: 18px; padding-right: 18px; }
  .hero { padding-top: 42px; gap: 38px; }
  h1 { font-size: 41px; }
  .hero-lead { font-size: 15px; }
  .hero-proof strong { font-size: 24px; }
  .career-strip { margin-left: 18px; margin-right: 18px; }
  .section { padding-top: 62px; padding-bottom: 62px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .role-grid, .skill-catalog, .case-card, .video-grid, .video-card.featured { grid-template-columns: 1fr; }
  .case-card, .video-card.featured { display: block; }
  .featured .video-shell, .video-shell { min-height: 225px; }
  .case-summary { padding: 27px; }
  .case-card h3 { margin-top: 29px; font-size: 25px; }
  .proof-media, .proof-media.compact { height: auto; aspect-ratio: 1.25 / 1; }
  .proof-media.compact { aspect-ratio: 1.55 / 1; }
  .runtime-proof-card figcaption { padding: 21px; }
  .migration-chain { grid-template-columns: 1fr; align-items: start; }
  .migration-chain i { transform: rotate(90deg); justify-self: start; }
  .validation-strip { grid-template-columns: 1fr; gap: 10px; }
  .validation-score { padding: 0; border: 0; }
  .safe-label { justify-self: start; }
  .evidence-summary { grid-template-columns: 1fr 1fr; }
  .evidence-summary div { border: 0; }
  .evidence-summary p { grid-column: 1 / -1; }
  .skill-toolbar { align-items: stretch; flex-direction: column; }
  .skill-search { min-width: 0; }
  .skill-list-head { align-items: flex-start; flex-direction: column; gap: 5px; }
  .training-card { padding: 31px 23px; gap: 28px; }
  .training-grid { grid-template-columns: 1fr; }
  .why-sales { padding: 28px 22px; gap: 25px; }
  .contact-section { margin: 42px 18px 20px; padding: 33px 24px; align-items: flex-start; flex-direction: column; }
  .contact-actions { width: 100%; }
  footer { flex-direction: column; gap: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}