:root {
  --ink: #17212f;
  --muted: #5e6a7d;
  --line: #dfe5ee;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --soft: #eef3f6;
  --mint: #00a884;
  --teal: #087f8c;
  --gold: #c88719;
  --coral: #d45d4f;
  --blue: #3767c8;
  --shadow: 0 18px 55px rgba(23, 33, 47, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
select {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--blue));
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 15px;
}

.nav a {
  padding: 9px 11px;
  border-radius: 7px;
}

.nav a:hover {
  color: var(--ink);
  background: #edf2f7;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: clamp(54px, 8vw, 92px) clamp(18px, 5vw, 76px) 40px;
  background:
    linear-gradient(135deg, rgba(0, 168, 132, 0.14), transparent 38%),
    linear-gradient(45deg, rgba(212, 93, 79, 0.12), transparent 42%),
    #fbfcfe;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 82px);
  line-height: 1.02;
}

.hero-text {
  max-width: 640px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-action,
.secondary-action,
.start-grid a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-action,
.start-grid a {
  color: #fff;
  background: var(--ink);
}

.secondary-action {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.hero-board {
  width: min(100%, 520px);
  padding: 18px;
  border: 1px solid rgba(23, 33, 47, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.board-top,
.prompt-top,
.course-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.board-top span,
.progress-card span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.board-top strong,
.progress-card strong {
  font-size: 28px;
}

.progress-track {
  width: 100%;
  height: 9px;
  margin: 14px 0;
  overflow: hidden;
  border-radius: 999px;
  background: #dde6ed;
}

.progress-track span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  transition: width 0.25s ease;
}

.artifact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.artifact-list span {
  min-height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
}

.board-note {
  margin-top: 14px;
  padding: 16px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--blue));
}

.board-note p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.86);
}

.section {
  padding: clamp(48px, 7vw, 86px) clamp(18px, 5vw, 76px);
}

.intro,
.industry-section {
  background: #fff;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 1.15fr);
  gap: 32px;
  align-items: start;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro h2,
.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
}

.intro p,
.section-heading p,
.day-content p,
.steps p,
.workflow-grid p,
.start-grid p,
.mini-card p,
.industry-picker p {
  color: var(--muted);
  line-height: 1.8;
}

.section-heading {
  max-width: 900px;
  margin-bottom: 28px;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 18px;
  align-items: end;
  max-width: none;
}

.progress-card,
.prompt-wide,
.prompt-box,
.steps article,
.workflow-grid article,
.video-note,
.start-grid article,
.day-card,
.industry-group,
.industry-picker,
.industry-solution,
.publish-layout > div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.progress-card {
  padding: 18px;
}

.start-grid,
.steps,
.workflow-grid,
.method-grid,
.utility-prompts,
.copy-guide {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.method-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.utility-prompts {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.copy-guide {
  margin: 16px 0;
}

.copy-guide div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101827;
  color: #fff;
}

.copy-guide span {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 5px 9px;
  border-radius: 6px;
  color: #b9c6d8;
  background: #17233a;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
}

.copy-guide strong {
  display: block;
  margin-bottom: 8px;
}

.copy-guide p {
  margin: 0;
  color: #d7dfeb;
  line-height: 1.7;
}

.start-grid article,
.steps article,
.workflow-grid article,
.method-grid article {
  padding: 22px;
}

.method-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.market-method {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.market-note {
  margin-top: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--teal);
  border-radius: 8px;
  background: #f3fbfa;
}

.market-note h3 {
  margin-bottom: 8px;
}

.market-note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.start-grid a {
  width: 100%;
  margin-top: 10px;
}

.video-note {
  margin-top: 16px;
  padding: 20px;
  border-left: 4px solid var(--gold);
  background: #fffaf0;
}

.video-note h3 {
  margin-bottom: 8px;
}

.video-note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.step-number {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--coral);
  font-weight: 900;
}

.prompt-wide,
.prompt-box {
  overflow: hidden;
}

.prompt-top {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.prompt-top h3 {
  margin: 0;
}

pre {
  margin: 0;
  padding: 18px;
  white-space: pre-wrap;
  word-break: break-word;
  color: #243041;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.75;
}

.copy-btn,
.done-btn {
  min-width: 74px;
  min-height: 36px;
  border: 0;
  border-radius: 7px;
  color: #fff;
  background: var(--teal);
  font-weight: 800;
  cursor: pointer;
}

.copy-btn:hover,
.done-btn:hover {
  background: #066d78;
}

.done-btn {
  background: var(--ink);
}

.done-btn.completed {
  background: var(--mint);
}

.course-list {
  display: grid;
  gap: 20px;
}

.day-card {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  overflow: hidden;
}

.day-meta {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 22px;
  color: #fff;
  background: var(--ink);
}

.day-meta span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  font-weight: 800;
}

.day-meta strong {
  font-size: 24px;
  line-height: 1.18;
}

.agent-day .day-meta {
  background: linear-gradient(135deg, var(--teal), var(--blue));
}

.day-content {
  padding: 24px;
}

.course-card-top {
  align-items: flex-start;
}

.day-content h3 {
  margin-bottom: 10px;
  font-size: 25px;
}

.case-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.mini-card {
  padding: 14px;
  border-radius: 8px;
  background: var(--soft);
}

.mini-card strong {
  display: block;
  margin-bottom: 6px;
}

.mini-card p {
  margin: 0;
  font-size: 14px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 16px;
}

.tag-row span {
  padding: 7px 9px;
  border-radius: 7px;
  background: #eef3f6;
  color: #344254;
  font-size: 14px;
}

.prompt-grid {
  display: grid;
  gap: 12px;
}

.prompt-box {
  position: relative;
}

.prompt-box .copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
}

.instruction-box {
  background: #f7fafc;
  border-style: dashed;
}

.instruction-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin: 12px 12px 0;
  padding: 0 10px;
  border-radius: 7px;
  color: var(--teal);
  background: #e7f5f3;
  font-size: 14px;
  font-weight: 800;
}

.prompt-box h4 {
  margin: 0;
  padding: 16px 110px 0 18px;
}

.instruction-box h4 {
  padding-right: 18px;
}

.prompt-box pre {
  padding-top: 12px;
}

.assignment {
  margin-top: 16px;
  padding: 16px;
  border-left: 4px solid var(--coral);
  border-radius: 8px;
  background: #fff7f5;
}

.assignment strong {
  display: block;
  margin-bottom: 6px;
}

.assignment p {
  margin: 0;
}

.industry-picker {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 360px);
  gap: 18px;
  align-items: center;
  padding: 18px;
  margin-bottom: 16px;
}

.industry-picker h3 {
  margin-bottom: 6px;
}

.industry-picker select {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.industry-solution {
  padding: 20px;
  margin-bottom: 18px;
}

.solution-profile {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0 16px;
}

.solution-profile div {
  min-height: 118px;
  padding: 14px;
  border-radius: 8px;
  background: var(--soft);
}

.solution-profile strong {
  display: block;
  margin-bottom: 8px;
}

.solution-profile p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.solution-item {
  padding: 12px;
  border-radius: 8px;
  background: var(--soft);
}

.solution-item strong {
  display: block;
  margin-bottom: 5px;
  color: var(--teal);
}

.solution-item span {
  color: #344254;
  font-size: 14px;
  line-height: 1.55;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.industry-group {
  padding: 20px;
}

.industry-group h3 {
  margin-bottom: 12px;
  color: var(--teal);
}

.industry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.industry-list li {
  padding: 8px 10px;
  border-radius: 7px;
  background: var(--soft);
  color: #344254;
  font-size: 14px;
}

.publish-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: 18px;
}

.publish-layout > div:first-child {
  padding: 22px;
}

.check-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 11px 12px;
  border-radius: 7px;
  background: var(--soft);
  color: #344254;
}

.footer {
  padding: 26px clamp(18px, 5vw, 76px);
  color: #d5dbe4;
  background: var(--ink);
}

.footer p {
  margin: 0;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 30px);
  opacity: 0;
  pointer-events: none;
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  background: var(--ink);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1080px) {
  .method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .solution-profile {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .solution-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
  }

  .hero,
  .intro,
  .split-heading,
  .publish-layout,
  .industry-picker {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .steps,
  .copy-guide,
  .workflow-grid,
  .method-grid,
  .utility-prompts,
  .start-grid,
  .industry-grid,
  .case-strip {
    grid-template-columns: 1fr;
  }

  .day-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 40px;
  }

  .hero-actions a,
  .copy-btn,
  .done-btn {
    width: 100%;
  }

  .course-card-top {
    display: grid;
  }

  .prompt-box .copy-btn {
    position: static;
    margin: 12px 12px 0;
  }

  .prompt-box h4 {
    padding: 14px 14px 0;
  }

  .solution-grid,
  .solution-profile,
  .artifact-list {
    grid-template-columns: 1fr;
  }
}