:root {
  --void: #080b0c;
  --void-soft: #101719;
  --paper: #f1ede2;
  --paper-bright: #fbf8ee;
  --ink: #111718;
  --cyan: #20d6f5;
  --cyan-soft: rgba(32, 214, 245, 0.14);
  --orange: #ff8b35;
  --muted-dark: #758083;
  --muted-light: #9da7a9;
  --line-dark: rgba(240, 237, 226, 0.14);
  --line-light: rgba(17, 23, 24, 0.16);
  --display: "STSong", "Songti SC", "Noto Serif SC", serif;
  --sans: "FZLanTingHeiS-R-GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--void);
  color: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: 0.11;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 4px, rgba(255,255,255,.025) 4px 5px),
    repeating-linear-gradient(90deg, transparent 0 7px, rgba(0,0,0,.08) 7px 8px);
  mix-blend-mode: soft-light;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 50;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.course-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  height: 104px;
  margin: 0 auto;
  padding: 0 48px;
  border-bottom: 1px solid var(--line-dark);
}

.course-brand {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  text-decoration: none;
}

.course-brand > span:last-child { display: grid; gap: 5px; }
.course-brand b { font-size: 12px; letter-spacing: .16em; }
.course-brand small { color: var(--muted-light); font-size: 9px; letter-spacing: .13em; }

.brand-seal {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--display);
  font-size: 21px;
  box-shadow: inset 0 0 20px var(--cyan-soft);
}

.course-status {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #c0c8c9;
  font-size: 11px;
  letter-spacing: .1em;
}

.course-status span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255,139,53,.12);
}

.course-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(480px, 1.05fr);
  gap: 72px;
  max-width: 1440px;
  min-height: 820px;
  margin: 0 auto;
  padding: 96px 48px 142px;
  background-image:
    linear-gradient(rgba(32,214,245,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32,214,245,.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

.course-hero::after {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 47%;
  width: 1px;
  content: "";
  background: linear-gradient(transparent, rgba(32,214,245,.22), transparent);
}

.hero-copy { position: relative; z-index: 2; }

.eyebrow {
  margin: 0 0 24px;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .17em;
  text-transform: uppercase;
}

.eyebrow.dark { color: #008ca7; }

.course-hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(64px, 6.7vw, 106px);
  font-weight: 400;
  line-height: .96;
  letter-spacing: -.065em;
}

.course-hero h1 span {
  color: var(--paper-bright);
  font-family: Impact, "Arial Narrow", sans-serif;
  font-size: 1.08em;
  letter-spacing: -.025em;
}

.hero-lead {
  max-width: 540px;
  margin: 38px 0 0;
  color: var(--muted-light);
  font-size: 15px;
  line-height: 1.9;
}

.hero-actions { display: flex; gap: 12px; margin-top: 38px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-width: 188px;
  padding: 16px 18px;
  border: 1px solid var(--line-dark);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover { transform: translateY(-3px); border-color: var(--cyan); }
.button-primary { background: var(--cyan); color: #051012; border-color: var(--cyan); }
.button-primary:hover { background: #62e8ff; }
.button-ghost { color: var(--paper); }

.evidence-console {
  position: relative;
  align-self: center;
  min-height: 560px;
  padding: 26px;
  border: 1px solid rgba(32,214,245,.34);
  background: rgba(8,11,12,.88);
  box-shadow: 24px 24px 0 rgba(32,214,245,.08);
}

.console-top,
.console-foot {
  display: flex;
  justify-content: space-between;
  color: #718084;
  font-family: Consolas, monospace;
  font-size: 8px;
  letter-spacing: .12em;
}

.console-top span:last-child { color: var(--orange); }

.flow-node {
  position: absolute;
  top: 82px;
  width: 142px;
  padding: 22px 18px;
  border: 1px solid var(--cyan);
  background: #0a1214;
  box-shadow: 0 0 22px var(--cyan-soft);
}

.flow-node small { display: block; margin-bottom: 10px; color: var(--cyan); font: 9px Consolas, monospace; }
.flow-node b { font-family: var(--display); font-size: 21px; font-weight: 400; }
.flow-node.source { left: 26px; }
.flow-node.output { right: 26px; }

.flow-node.source::after,
.flow-node.output::before {
  position: absolute;
  top: 50%;
  width: 54px;
  height: 1px;
  content: "";
  background: var(--cyan);
}

.flow-node.source::after { left: 100%; }
.flow-node.output::before { right: 100%; background: var(--orange); }

.flow-sources {
  position: absolute;
  top: 244px;
  right: 26px;
  left: 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.flow-sources span {
  padding: 16px;
  border: 1px solid rgba(32,214,245,.25);
  color: #abc4c8;
  font-size: 11px;
  text-align: center;
}

.flow-gate {
  position: absolute;
  top: 82px;
  left: 50%;
  display: grid;
  width: 98px;
  height: 98px;
  place-items: center;
  border: 1px solid var(--orange);
  background: #1d130d;
  color: var(--orange);
  transform: translateX(-50%);
  box-shadow: 0 0 24px rgba(255,139,53,.2);
}

.flow-gate small { align-self: end; font-size: 9px; }
.flow-gate b { align-self: start; font-size: 30px; }
.console-foot { position: absolute; right: 26px; bottom: 24px; left: 26px; justify-content: center; }

.hero-facts {
  position: absolute;
  right: 48px;
  bottom: 42px;
  left: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.hero-facts div {
  display: grid;
  gap: 8px;
  padding: 22px;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.hero-facts strong { font-family: var(--display); font-size: 25px; font-weight: 400; }
.hero-facts span { color: #747f81; font-size: 10px; letter-spacing: .12em; }

.diagnostic-section,
.case-section,
.deliverable-section,
.offer-section {
  padding: 112px max(48px, calc((100vw - 1344px) / 2));
  background: var(--paper);
  color: var(--ink);
}

.diagnostic-section {
  display: grid;
  grid-template-columns: .78fr 1.22fr;
  gap: 88px;
  align-items: start;
}

.section-intro h2,
.case-heading h2,
.deliverable-copy h2,
.offer-copy h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(46px, 5vw, 76px);
  font-weight: 400;
  line-height: 1.07;
  letter-spacing: -.055em;
}

.section-intro > p:last-child,
.case-heading > p,
.deliverable-copy > p:last-child {
  max-width: 520px;
  margin: 32px 0 0;
  color: #6e7472;
  font-size: 13px;
  line-height: 1.9;
}

.diagnostic-card {
  padding: 38px;
  border: 1px solid var(--line-light);
  background: var(--paper-bright);
  box-shadow: 18px 18px 0 #d8d2c4;
}

.diagnostic-card fieldset { display: grid; gap: 0; margin: 0; padding: 0; border: 0; }
.diagnostic-card legend { margin-bottom: 18px; color: #777c79; font-size: 10px; font-weight: 800; letter-spacing: .15em; }

.diagnostic-card label {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-top: 1px solid var(--line-light);
  cursor: pointer;
}

.diagnostic-card input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: #008ca7; }
.diagnostic-card label span { color: #666d6a; font-size: 12px; line-height: 1.65; }
.diagnostic-card label b { display: block; margin-bottom: 4px; color: var(--ink); font-size: 15px; }

.diagnostic-submit {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin-top: 22px;
  padding: 17px 18px;
  border: 0;
  background: var(--ink);
  color: var(--paper);
  font: 800 12px var(--sans);
  cursor: pointer;
}

.diagnostic-submit:hover { background: #006f83; }

.diagnostic-result {
  margin-top: 20px;
  padding: 22px;
  border: 1px solid rgba(0,140,167,.4);
  outline: 0;
  background: #e6f3f2;
}

.result-heading { display: flex; justify-content: space-between; color: #547072; font-size: 10px; }
.diagnostic-result h3 { margin: 18px 0 8px; font-family: var(--display); font-size: 34px; font-weight: 400; }
.diagnostic-result p { margin: 0; color: #566261; font-size: 12px; line-height: 1.8; }
.diagnostic-meter { height: 4px; margin-top: 20px; background: rgba(0,140,167,.14); }
.diagnostic-meter i { display: block; width: var(--diagnostic-progress, 0); height: 100%; background: #008ca7; transition: width 500ms ease; }

.method-section,
.schedule-section {
  max-width: 1440px;
  margin: 0 auto;
  padding: 112px 48px;
}

.section-intro.light { color: var(--paper); }

.before-after {
  display: grid;
  grid-template-columns: 1fr 140px 1fr;
  gap: 24px;
  align-items: stretch;
  margin-top: 58px;
}

.before-card,
.after-card {
  min-height: 360px;
  padding: 34px;
  border: 1px solid var(--line-dark);
}

.before-card { color: #8c9698; }
.after-card { border-color: rgba(32,214,245,.5); background: rgba(32,214,245,.05); }
.before-card > span,
.after-card > span { color: var(--cyan); font-size: 9px; font-weight: 800; letter-spacing: .14em; }
.before-card blockquote { margin: 66px 0 62px; color: var(--paper); font-family: var(--display); font-size: 29px; line-height: 1.5; }
.before-card ul,
.after-card ul { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; font-size: 11px; }
.before-card li::before { content: "× "; color: #ef6c5d; }
.after-card li::before { content: "✓ "; color: var(--cyan); }

.file-stack { display: grid; gap: 10px; margin: 52px 0 42px; }
.file-stack code { padding: 12px 14px; border-left: 2px solid var(--cyan); background: rgba(255,255,255,.04); color: #bceef5; font-size: 12px; }

.transformation { display: grid; place-items: center; color: var(--orange); }
.transformation i { width: 1px; height: 100%; background: linear-gradient(transparent, var(--orange), transparent); }
.transformation b { padding: 10px 0; font: 10px Consolas, monospace; writing-mode: vertical-rl; letter-spacing: .15em; }

.case-heading {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 64px;
  align-items: end;
  margin-bottom: 58px;
}

.case-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.case-card { min-height: 540px; padding: 42px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.case-card.commerce { background: var(--ink); color: var(--paper); }
.case-index { display: flex; justify-content: space-between; color: #888d88; font: 9px Consolas, monospace; letter-spacing: .13em; }
.case-index span { color: #008ca7; font-family: var(--sans); font-weight: 800; }
.case-card.commerce .case-index span { color: var(--orange); }
.case-card h3 { margin: 72px 0 30px; font-family: var(--display); font-size: clamp(38px, 4vw, 58px); font-weight: 400; line-height: 1.18; letter-spacing: -.04em; }
.case-card p { max-width: 520px; margin: 0; color: #6d7472; font-size: 13px; line-height: 1.9; }
.case-card.commerce p { color: #9aa4a5; }
.case-artifacts { display: flex; flex-wrap: wrap; gap: 8px; margin: 38px 0; }
.case-artifacts span { padding: 8px 10px; border: 1px solid var(--line-light); color: #626966; font-size: 10px; }
.commerce .case-artifacts span { border-color: var(--line-dark); color: #b6bfc0; }
.case-card small { color: #949992; font-size: 10px; }

.schedule-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 58px; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.schedule-grid article { position: relative; min-height: 380px; padding: 34px; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.schedule-grid article.night { background: var(--orange); color: #1a0d05; }
.schedule-grid article > b { display: block; color: var(--cyan); font: 10px Consolas, monospace; letter-spacing: .16em; }
.schedule-grid article.night > b { color: #5b2510; }
.schedule-grid article > strong { display: block; margin-top: 14px; color: #747f81; font: 11px Consolas, monospace; }
.schedule-grid article.night > strong { color: #7b3d20; }
.schedule-grid h3 { margin: 82px 0 22px; font-family: var(--display); font-size: 33px; font-weight: 400; }
.schedule-grid p { margin: 0; color: #8f999b; font-size: 12px; line-height: 1.85; }
.schedule-grid article.night p { color: #522713; }
.schedule-grid article > span { position: absolute; right: 34px; bottom: 30px; left: 34px; padding-top: 16px; border-top: 1px solid currentColor; color: #697477; font-size: 9px; letter-spacing: .12em; }
.schedule-grid article.night > span { color: #662d14; }

.deliverable-section { display: grid; grid-template-columns: .85fr 1.15fr; gap: 88px; align-items: start; }
.deliverable-list { margin: 0; padding: 0; border-top: 1px solid var(--line-light); list-style: none; }
.deliverable-list li { display: grid; grid-template-columns: 48px 1fr auto; gap: 18px; align-items: center; padding: 24px 0; border-bottom: 1px solid var(--line-light); }
.deliverable-list b { color: #008ca7; font: 10px Consolas, monospace; }
.deliverable-list span { font-family: var(--display); font-size: 23px; }
.deliverable-list small { color: #7e837e; font-size: 10px; }

.fit-section { display: grid; grid-template-columns: 1fr 1fr; max-width: 1440px; margin: 0 auto; padding: 0 48px 112px; }
.fit-section article { min-height: 420px; padding: 44px; border: 1px solid rgba(32,214,245,.32); background: rgba(32,214,245,.04); }
.fit-section article.not-fit { border-color: var(--line-dark); background: transparent; }
.fit-section article > span { color: var(--cyan); font-size: 10px; font-weight: 800; letter-spacing: .15em; }
.fit-section .not-fit > span { color: #818b8d; }
.fit-section ul { display: grid; gap: 20px; margin: 70px 0 0; padding: 0; list-style: none; }
.fit-section li { padding-bottom: 18px; border-bottom: 1px solid var(--line-dark); color: #b3babb; font-size: 12px; line-height: 1.7; }
.fit-section article:not(.not-fit) li::before { content: "✓ "; color: var(--cyan); }
.fit-section .not-fit li::before { content: "— "; color: #687274; }

.offer-section { display: grid; grid-template-columns: 1.15fr .85fr; gap: 88px; align-items: center; background: #dfe4df; }
.offer-facts { display: grid; margin-top: 42px; border-top: 1px solid var(--line-light); }
.offer-facts div { display: grid; grid-template-columns: 128px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line-light); }
.offer-facts span { color: #6f7773; font-size: 10px; }
.offer-facts b { font-size: 14px; }
.offer-facts small { grid-column: 2; color: #777e7a; font-size: 10px; }
.offer-note { max-width: 650px; margin: 28px 0 0; color: #707873; font-size: 11px; line-height: 1.8; }

.contact-card { justify-self: end; width: min(420px, 100%); padding: 30px; background: var(--ink); color: var(--paper); text-align: center; box-shadow: 20px 20px 0 #00a9c7; }
.qr-frame { padding: 16px; background: #fff; }
.qr-frame img { display: block; width: 100%; height: auto; }
.contact-card p { margin: 24px 0 7px; color: #879294; font-size: 10px; letter-spacing: .13em; }
.contact-card strong { display: block; color: var(--cyan); font: 700 22px Consolas, monospace; }
.contact-card > span { display: block; margin-top: 16px; color: #9da6a7; font-size: 11px; line-height: 1.7; }

.course-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: center; max-width: 1440px; min-height: 110px; margin: 0 auto; padding: 28px 48px; color: #727d7f; }
.course-footer a { color: var(--paper); font-size: 11px; text-decoration: none; }
.course-footer p { margin: 0; font-size: 9px; letter-spacing: .12em; text-align: center; }
.course-footer small { justify-self: end; max-width: 330px; font-size: 9px; line-height: 1.6; text-align: right; }

[data-reveal] { opacity: 1; transform: none; transition: opacity 600ms ease, transform 600ms ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1040px) {
  .course-hero { grid-template-columns: 1fr; }
  .course-hero::after { display: none; }
  .evidence-console { min-height: 520px; }
  .diagnostic-section,
  .deliverable-section,
  .offer-section { grid-template-columns: 1fr; }
  .contact-card { justify-self: start; }
  .case-heading { grid-template-columns: 1fr; }
  .before-after { grid-template-columns: 1fr; }
  .transformation { grid-template-columns: 1fr auto 1fr; }
  .transformation i { width: 100%; height: 1px; }
  .transformation b { writing-mode: horizontal-tb; }
  .schedule-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .course-header { height: 84px; padding: 0 20px; }
  .course-brand small { display: none; }
  .course-status { font-size: 9px; }
  .course-hero { gap: 52px; min-height: auto; padding: 68px 20px 178px; background-size: 32px 32px; }
  .course-hero h1 { font-size: clamp(54px, 17vw, 78px); }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .evidence-console { min-height: 500px; padding: 20px; }
  .flow-node { width: 120px; padding: 18px 12px; }
  .flow-node.source { left: 18px; }
  .flow-node.output { right: 18px; }
  .flow-node.source::after,
  .flow-node.output::before { width: 28px; }
  .flow-gate { width: 74px; height: 88px; }
  .flow-sources { right: 18px; left: 18px; }
  .console-foot { right: 18px; left: 18px; font-size: 6px; }
  .hero-facts { right: 20px; bottom: 28px; left: 20px; grid-template-columns: 1fr 1fr; }
  .hero-facts div { padding: 14px; }
  .hero-facts strong { font-size: 20px; }
  .diagnostic-section,
  .case-section,
  .deliverable-section,
  .offer-section { padding: 78px 20px; }
  .diagnostic-section { gap: 48px; }
  .diagnostic-card { padding: 24px; box-shadow: 10px 10px 0 #d8d2c4; }
  .method-section,
  .schedule-section { padding: 78px 20px; }
  .section-intro h2,
  .case-heading h2,
  .deliverable-copy h2,
  .offer-copy h2 { font-size: 44px; }
  .before-card,
  .after-card { min-height: 330px; padding: 26px; }
  .case-grid { grid-template-columns: 1fr; }
  .case-card { min-height: 500px; padding: 28px; }
  .case-card h3 { margin-top: 60px; font-size: 40px; }
  .deliverable-list li { grid-template-columns: 32px 1fr; }
  .deliverable-list small { grid-column: 2; }
  .fit-section { grid-template-columns: 1fr; padding: 0 20px 78px; }
  .fit-section article { min-height: 360px; padding: 28px; }
  .fit-section ul { margin-top: 48px; }
  .offer-facts div { grid-template-columns: 1fr; }
  .offer-facts small { grid-column: 1; }
  .contact-card { box-shadow: 10px 10px 0 #00a9c7; }
  .course-footer { grid-template-columns: 1fr; padding: 32px 20px; }
  .course-footer p { text-align: left; }
  .course-footer small { justify-self: start; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}