:root {
  --ink: #0a2232;
  --deep: #082a3b;
  --green: #b8f36c;
  --cream: #f5f2e8;
  --paper: #fbfaf5;
  --muted: #68777d;
  --line: #d5ddd6;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}
button,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.shell {
  width: min(1160px, calc(100% - 40px));
  margin: auto;
}
.ribbon {
  background: var(--green);
  padding: 9px;
  text-align: center;
  font-size: 11px;
  font-weight: 800;
}
.ribbon b {
  background: var(--ink);
  color: #fff;
  border-radius: 3px;
  padding: 3px 7px;
  margin-right: 8px;
}
.nav {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: inherit;
  text-decoration: none;
  font-weight: 900;
}
.brand i {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--green);
  border-radius: 52% 48% 45% 55%;
  font: 700 20px serif;
}
.brand small {
  display: block;
  color: #7d898c;
  font: 500 8px Arial;
  letter-spacing: 0.15em;
  margin-top: 3px;
}
.nav nav {
  display: flex;
  background: #e7e7df;
  padding: 4px;
  border-radius: 9px;
}
.nav nav button {
  border: 0;
  background: transparent;
  padding: 9px 13px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 800;
}
.nav nav button:hover {
  background: white;
}
.hero {
  padding: 75px 0 100px;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 76px;
  align-items: center;
}
.eyebrow {
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.eyebrow:before {
  content: "";
  display: inline-block;
  width: 23px;
  height: 2px;
  background: #63943c;
  margin-right: 9px;
  vertical-align: middle;
}
.hero h1 {
  font-size: clamp(48px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.055em;
  margin: 20px 0;
}
.hero h1 em {
  display: block;
  color: #3c7823;
  font-style: normal;
}
.lead {
  color: #56656b;
  font-size: 17px;
  line-height: 1.8;
}
.actions {
  display: flex;
  gap: 12px;
  margin: 30px 0;
}
.btn {
  min-height: 49px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
  font-weight: 900;
}
.primary {
  background: var(--ink);
  color: white;
  box-shadow: 5px 5px 0 var(--green);
}
.facts {
  display: flex;
  gap: 40px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.facts b {
  font-size: 16px;
}
.facts small {
  display: block;
  color: #879290;
  font-size: 9px;
  font-weight: 500;
}
.flow {
  background: var(--deep);
  color: #fff;
  border-radius: 22px;
  padding: 25px 28px;
  box-shadow: 17px 17px 0 #dbe2d4;
}
.flow header {
  display: flex;
  justify-content: space-between;
  color: #93aab3;
  font: 700 9px Arial;
  letter-spacing: 0.12em;
}
.flow header b {
  color: var(--green);
}
.flow ol {
  list-style: none;
  padding: 20px 0 0;
  margin: 0;
}
.flow li {
  padding: 18px 0;
  border-top: 1px solid #2c4d5c;
  display: grid;
  grid-template-columns: 43px 1fr;
  color: #7f969f;
  position: relative;
}
.flow li:after {
  content: "";
  position: absolute;
  right: 0;
  top: 24px;
  width: 9px;
  height: 9px;
  border: 1px solid #627b85;
  border-radius: 50%;
}
.flow li.done {
  color: white;
}
.flow li.done:after {
  background: var(--green);
  border-color: var(--green);
}
.flow li i {
  font: 700 9px Arial;
  color: var(--green);
}
.flow li b {
  font-size: 13px;
}
.flow li small {
  display: block;
  color: #90a5ad;
  font-weight: 500;
  font-size: 10px;
  margin-top: 5px;
}
.view {
  display: none;
}
.view.active {
  display: block;
}
.product-zone {
  background: #e8ece3;
  padding: 100px 0;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 42px;
}
.section-head h2,
.checkout h2,
.workspace h2,
.upgrade h2 {
  font-size: 39px;
  letter-spacing: -0.04em;
  margin: 12px 0 0;
}
.section-head > p {
  color: var(--muted);
  font-size: 12px;
}
.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.products article {
  background: var(--paper);
  border: 1px solid #ced7d0;
  border-radius: 15px;
  padding: 30px;
  position: relative;
}
.products article.featured {
  background: var(--ink);
  color: #fff;
}
.products article > label {
  position: absolute;
  right: 20px;
  top: 0;
  background: var(--green);
  color: var(--ink);
  font-size: 9px;
  font-weight: 900;
  padding: 7px 10px;
  border-radius: 0 0 6px 6px;
}
.products article > p {
  color: #648a47;
  font-size: 11px;
  font-weight: 900;
}
.products h3 {
  font-size: 21px;
}
.products strong {
  display: block;
  font: 800 34px Arial;
  margin: 22px 0;
}
.products strong small {
  display: block;
  color: #829190;
  font-size: 9px;
}
.products article > span {
  display: block;
  color: #65747a;
  font-size: 13px;
  line-height: 1.7;
  min-height: 72px;
}
.featured > span {
  color: #aabcc3 !important;
}
.products em {
  display: block;
  background: #fff0e7;
  color: #9d4e28;
  font-size: 10px;
  font-style: normal;
  padding: 8px;
}
.products .choose {
  width: 100%;
  border: 0;
  border-top: 1px solid #d8ded9;
  background: transparent;
  padding: 18px 0 0;
  margin-top: 18px;
  text-align: left;
  color: inherit;
  font-weight: 900;
}
.featured .choose {
  color: var(--green);
  border-color: #355160;
}
.checkout {
  padding: 85px 0;
  min-height: 230px;
}
.checkout-content,
#checkout-content {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 80px;
}
.checkout p {
  color: var(--muted);
  line-height: 1.7;
}
.checkout ul {
  list-style: none;
  padding: 0;
}
.checkout li {
  border-bottom: 1px solid var(--line);
  padding: 9px 0;
  font-size: 12px;
}
.checkout aside {
  background: white;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 25px;
  box-shadow: 11px 11px 0 #dfe4d8;
}
.checkout aside > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}
.checkout aside > div b {
  font: 900 35px Arial;
}
.checkout label {
  display: flex;
  gap: 9px;
  margin: 18px 0;
  font-size: 11px;
  line-height: 1.5;
}
.checkout aside .btn {
  width: 100%;
}
.link {
  border: 0;
  background: transparent;
  text-decoration: underline;
  font-size: 11px;
}
.checkout .link {
  display: block;
  margin: 15px auto;
}
#assessment-fields {
  display: grid;
  gap: 12px;
  background: #eef0e8;
  padding: 16px;
  border-radius: 9px;
  margin: 18px 0;
}
#assessment-fields[hidden] {
  display: none;
}
#assessment-fields label {
  display: grid;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
}
#assessment-fields input,
#assessment-fields textarea {
  width: 100%;
  border: 1px solid #cad4cc;
  background: white;
  padding: 11px;
  font: inherit;
}
#assessment-fields textarea {
  min-height: 80px;
  resize: vertical;
}
.workspace {
  padding: 80px 0 105px;
}
.workspace-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 38px;
}
.workspace-head code {
  background: #e2e8dc;
  padding: 8px 12px;
  border-radius: 99px;
  font-size: 10px;
}
.empty {
  text-align: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 65px;
}
.empty > b {
  font-size: 22px;
}
.empty p {
  color: var(--muted);
}
.lesson-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
}
.lesson-grid > aside {
  background: var(--deep);
  color: white;
  border-radius: 15px;
  padding: 26px;
}
.lesson-grid > aside p {
  color: #91a8b1;
  font-size: 10px;
}
.lesson-grid > aside > strong {
  font: 800 33px Arial;
}
.progress {
  height: 5px;
  background: #294b5a;
  margin: 12px 0 25px;
}
.progress i {
  display: block;
  width: 35%;
  height: 100%;
  background: var(--green);
}
.lesson-grid ol {
  list-style: none;
  padding: 0;
}
.lesson-grid li {
  padding: 13px 0;
  border-top: 1px solid #2c4c5a;
  color: #77909b;
  font-size: 11px;
}
.lesson-grid li.done,
.lesson-grid li.current {
  color: white;
}
.lesson-grid li button {
  width: 100%; border: 0; padding: 0; color: inherit; background: transparent;
  text-align: left; font: inherit; cursor: pointer;
}
.lesson-content {
  margin: 18px 0; padding: 18px 20px; border: 1px solid rgba(72, 190, 160, .28);
  border-radius: 16px; background: rgba(72, 190, 160, .07);
}
.lesson-content p { margin: 0 0 10px; }
.lesson-content ol { margin: 0; padding-left: 22px; }
.lesson-content li { margin: 8px 0; line-height: 1.65; }
.lesson-grid > article {
  background: white;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 38px;
}
.lesson-grid > article > small {
  color: #628c43;
  font-weight: 900;
}
.lesson-grid h3 {
  font-size: 27px;
}
.lesson-grid > article > p {
  color: var(--muted);
  line-height: 1.7;
}
.task {
  background: #eef0e8;
  border-left: 3px solid #65963e;
  padding: 20px;
  margin: 25px 0;
}
.task p {
  font-size: 12px;
  line-height: 1.6;
}
.task textarea {
  width: 100%;
  min-height: 105px;
  border: 1px solid #cad4cc;
  padding: 12px;
  resize: vertical;
}
.acceptance {
  display: flex;
  gap: 14px;
  background: #eef8e4;
  border: 1px solid #cce8ae;
  padding: 18px;
  border-radius: 8px;
}
.acceptance i {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--green);
  border-radius: 50%;
}
.acceptance p {
  margin: 0;
  font-size: 11px;
  line-height: 1.7;
  color: #526f3e;
}
.lanes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.lanes article {
  border: 1px solid var(--line);
  background: white;
  border-radius: 15px;
  padding: 26px;
}
.lanes .test-lane {
  background: var(--deep);
  color: white;
}
.lanes header {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
}
.lanes header > b {
  background: var(--green);
  color: var(--ink);
  padding: 5px 8px;
  border-radius: 4px;
}
.real-lane header > b {
  background: #e7eae6;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}
.metrics > div {
  background: #123b4c;
  padding: 14px 10px;
  border-radius: 7px;
}
.real-lane .metrics > div {
  background: #eef0ec;
}
.metrics span {
  display: block;
  color: #90a5ae;
  font-size: 9px;
}
.metrics b {
  display: block;
  font: 800 21px Arial;
  margin-top: 7px;
}
.metrics small {
  font-size: 8px;
}
.activity {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid #31515e;
  color: #91a6ae;
  font-size: 10px;
  line-height: 1.8;
}
.truth {
  background: #f2efe8;
  padding: 16px;
  color: #6e7976;
  font-size: 11px;
  line-height: 1.6;
  margin-top: 20px;
}
.upgrade {
  background: var(--green);
  padding: 70px 0;
}
.upgrade > .shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: end;
}
.upgrade button {
  border: 0;
  border-bottom: 1px solid;
  background: transparent;
  padding: 0 0 5px;
  font-weight: 900;
}
footer {
  background: #061c29;
  color: white;
  padding: 45px 0;
}
footer > .shell {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
footer .brand i {
  background: var(--green);
  color: var(--ink);
}
footer p {
  text-align: right;
  color: #8399a2;
  font-size: 10px;
  line-height: 1.7;
}
.payment-note {
  margin-top: 22px;
  padding: 16px;
  background: #fff7e8;
  border-left: 3px solid #d19334;
  color: #67553a;
}
.payment-note p {
  margin: 6px 0 0;
  font-size: 11px;
}
.task small {
  display: block;
  margin-top: 7px;
  color: #728078;
  font-size: 9px;
}
footer button {
  border: 0;
  padding: 0;
  background: transparent;
  color: #b9c8ce;
  text-decoration: underline;
  font-size: 10px;
}
dialog {
  width: min(560px, calc(100% - 28px));
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 30px;
  color: var(--ink);
  box-shadow: 0 22px 70px #061c2955;
}
dialog::backdrop {
  background: #061c29aa;
}
dialog > button {
  position: absolute;
  right: 16px;
  top: 12px;
  border: 0;
  background: transparent;
  font-size: 28px;
}
dialog h2 {
  margin-top: 0;
}
dialog div {
  color: var(--muted);
  line-height: 1.8;
}
.legal-warning {
  background: #fff3de;
  padding: 12px;
  font-size: 11px;
  line-height: 1.6;
}
@media (max-width: 850px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .products,
  .lanes {
    grid-template-columns: 1fr;
  }
  #checkout-content,
  .lesson-grid {
    grid-template-columns: 1fr;
  }
  .upgrade > .shell {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .section-head {
    display: block;
  }
}
@media (max-width: 540px) {
  .shell {
    width: min(100% - 26px, 1160px);
  }
  .nav {
    height: auto;
    padding: 14px 0;
    align-items: start;
  }
  .nav nav {
    display: grid;
  }
  .nav nav button {
    padding: 5px;
    font-size: 9px;
  }
  .hero {
    padding: 48px 0 70px;
  }
  .hero h1 {
    font-size: 42px;
  }
  .actions {
    flex-direction: column;
  }
  .facts {
    gap: 18px;
  }
  .product-zone {
    padding: 65px 0;
  }
  .section-head h2,
  .checkout h2,
  .workspace h2,
  .upgrade h2 {
    font-size: 31px;
  }
  .metrics {
    grid-template-columns: 1fr 1fr;
  }
  .workspace-head {
    display: block;
  }
  footer > .shell {
    display: block;
  }
  footer p {
    text-align: left;
    margin-top: 20px;
  }
}

.course-library {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0 0 24px;
}
.course-library article {
  background: #fff;
  border: 1px solid #dfe5ef;
  border-radius: 18px;
  padding: 16px;
}
.course-library article.owned {
  border-color: #06b6d4;
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.12);
}
.course-library h3 {
  margin: 14px 0 6px;
}
.course-library p {
  min-height: 48px;
  color: #667085;
}
.video-stage,
.online-player {
  min-height: 150px;
  border-radius: 14px;
  background:
    radial-gradient(circle at 70% 20%, #7c3aed 0, transparent 32%),
    linear-gradient(135deg, #07111f, #0c3144);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 18px;
  overflow: hidden;
}
.video-stage span {
  color: #67e8f9;
  font-size: 12px;
}
.video-stage b {
  font-size: 22px;
  margin: 4px 0;
}
.video-stage small {
  color: #cbd5e1;
}
.watch-course {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 12px;
  background: #101828;
  color: white;
  cursor: pointer;
}
.online-player {
  min-height: 260px;
  justify-content: center;
  align-items: center;
  text-align: center;
  background:
    radial-gradient(
      circle at 50% 35%,
      rgba(124, 58, 237, 0.8),
      transparent 25%
    ),
    linear-gradient(135deg, #030712, #0e7490);
}
.online-player b {
  font-size: 24px;
}
.online-player span {
  display: block;
  color: #a5f3fc;
  margin-top: 8px;
}
@media (max-width: 800px) {
  .course-library {
    grid-template-columns: 1fr;
  }
  .course-library p {
    min-height: auto;
  }
}
.benefits {
  padding: 0 0 0 18px;
  margin: 16px 0;
  color: #53656b;
  font-size: 11px;
  line-height: 1.8;
}
.faq {
  padding: 80px 0;
}
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 17px 20px;
  margin: 10px 0;
}
.faq summary {
  font-weight: 900;
  cursor: pointer;
}
.faq details p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
  margin: 12px 0 0;
}
.promo-video {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 32px;
  align-items: center;
  padding-top: 26px;
  padding-bottom: 56px;
}
.promo-video h2 {
  margin: 8px 0 14px;
}
.promo-video p {
  color: var(--muted);
  line-height: 1.8;
}
.promo-video video {
  width: 100%;
  max-height: 640px;
  border-radius: 24px;
  background: #050807;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.25);
}
.online-player video {
  width: 100%;
  max-height: 520px;
  border-radius: 14px;
  background: #000;
}
@media (max-width: 760px) {
  .promo-video {
    grid-template-columns: 1fr;
  }
  .promo-video video {
    max-width: 390px;
    margin: auto;
  }
}
.order-status{margin:0 0 22px;padding:18px 22px;border:1px solid #b8d690;border-left:5px solid #63943c;border-radius:10px;background:#f1f9e9}.order-status b{font-size:16px}.order-status p{margin:7px 0 0;color:#587047;font-size:12px;line-height:1.7}