:root {
  color-scheme: light;
  --bg: oklch(1 0 0);
  --surface: oklch(0.965 0 0);
  --surface-tint: oklch(0.94 0.018 160);
  --ink: oklch(0.18 0.025 245);
  --muted: oklch(0.48 0.02 245);
  --line: oklch(0.86 0.01 245);
  --primary: oklch(0.48 0.16 12);
  --primary-soft: oklch(0.93 0.035 20);
  --accent: oklch(0.36 0.09 160);
  --accent-soft: oklch(0.91 0.035 160);
  --white: oklch(1 0 0);
  --shadow: 0 24px 70px oklch(0.18 0.025 245 / 0.14);
  --max: 1180px;
  --pad: clamp(20px, 4vw, 56px);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body::selection {
  background: var(--primary-soft);
  color: var(--ink);
}

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

img {
  display: block;
  width: 100%;
  height: auto;
}

video {
  display: block;
  width: 100%;
  height: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  transform: translateY(-140%);
  background: var(--ink);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 4px;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px var(--pad);
  color: var(--white);
  background: oklch(0.12 0 0 / 0.72);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid oklch(1 0 0 / 0.48);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px clamp(10px, 1.4vw, 20px);
  font-size: 13px;
}

.site-nav a {
  color: oklch(1 0 0 / 0.82);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--white);
}

.hero {
  position: relative;
  min-height: min(760px, 86svh);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
  background: oklch(0.12 0 0);
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-image {
  height: 100%;
  object-fit: cover;
  object-position: 48% 38%;
}

.hero-shade {
  z-index: -1;
  background: oklch(0.08 0 0 / 0.48);
}

.hero-content {
  width: min(960px, calc(100% - var(--pad) * 2));
  margin: 0 0 clamp(56px, 11svh, 110px) var(--pad);
  color: var(--white);
}

.role-line,
.section-label,
.route-type {
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.3;
}

.hero .role-line {
  color: oklch(0.89 0.08 22);
  margin-bottom: 18px;
}

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

h1,
h2 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 12em;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 1.05;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 58px);
  line-height: 1.12;
}

h3 {
  font-size: clamp(20px, 2.1vw, 28px);
  line-height: 1.35;
}

.hero-copy {
  max-width: 620px;
  margin-bottom: 30px;
  color: oklch(1 0 0 / 0.82);
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.7;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 18px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 750;
  line-height: 1.2;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--white);
}

.button.secondary {
  border-color: oklch(1 0 0 / 0.62);
  background: oklch(1 0 0 / 0.08);
  color: var(--white);
}

.section-pad {
  padding: clamp(72px, 11vw, 140px) var(--pad);
}

.intro,
.courses,
.workflow,
.life,
.contact {
  background: var(--bg);
}

.intro-grid,
.process-grid,
.workflow-grid,
.contact-inner {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.75fr);
  gap: clamp(36px, 6vw, 92px);
  align-items: start;
}

.intro .section-label,
.process .section-label {
  width: min(var(--max), 100%);
  margin: 0 auto 22px;
}

.process-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.55fr);
}

.intro-copy {
  max-width: 680px;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 20px);
}

.intro-copy p:last-child,
.workflow-copy p:last-child,
.contact-copy p:last-child {
  margin-bottom: 0;
}

.fact-strip {
  width: min(var(--max), 100%);
  margin: clamp(44px, 6vw, 72px) auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.fact-strip div {
  padding: 24px 24px 24px 0;
  border-right: 1px solid var(--line);
}

.fact-strip div:last-child {
  border-right: 0;
}

.fact-strip dt {
  color: var(--primary);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(38px, 5vw, 70px);
  font-weight: 700;
  line-height: 1;
}

.fact-strip dd {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.quote-proof {
  padding-top: clamp(16px, 2.7vw, 35px);
  padding-bottom: clamp(42px, 6vw, 78px);
  background:
    linear-gradient(135deg, oklch(0.985 0.012 30), var(--bg) 44%),
    var(--bg);
}

.quote-proof-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(180px, 0.34fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 54px);
  align-items: start;
  width: min(var(--max), 100%);
  margin: 0 auto;
  padding: clamp(26px, 4vw, 50px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.quote-proof-inner::before {
  content: "“";
  position: absolute;
  top: clamp(18px, 4vw, 38px);
  right: 0;
  color: var(--primary-soft);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(80px, 12vw, 174px);
  font-weight: 700;
  line-height: 0.72;
  pointer-events: none;
}

.quote-proof-label {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
}

.quote-proof-label span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.quote-proof blockquote {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 880px;
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(22px, 2.8vw, 45px);
  font-weight: 700;
  line-height: 1.18;
}

.section-head {
  width: min(880px, 100%);
  margin: 0 auto clamp(42px, 7vw, 86px);
  text-align: center;
}

.section-head.narrow {
  width: min(820px, 100%);
}

.training .section-head.narrow {
  width: min(1080px, 100%);
}

@media (min-width: 981px) {
  .training #training-title {
    white-space: nowrap;
  }
}

.section-head .section-label {
  margin-bottom: 18px;
}

.section-head p {
  margin: 0 auto;
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 20px);
}

.course-layout {
  width: min(var(--max), 100%);
  margin: 0 auto clamp(40px, 6vw, 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.72fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: stretch;
}

.evidence-large,
.project-card,
.promo-video-card,
.training-visual,
.training-evidence-grid figure,
.workflow-visual,
.life-gallery img,
.personal-image {
  margin: 0;
}

.evidence-large img,
.project-card img,
.video-shell,
.training-visual img,
.training-evidence-grid img,
.workflow-visual img,
.life-gallery img,
.personal-image img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
}

figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.method-stack {
  display: grid;
  gap: 16px;
}

.method-block {
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.method-block span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.method-block h3 {
  margin: 28px 0 0;
  font-size: clamp(19px, 1.7vw, 25px);
}

.project-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.project-card {
  background: var(--white);
}

.project-card figcaption {
  padding: 0 2px;
}

.project-card strong,
.project-card span {
  display: block;
}

.project-card strong {
  color: var(--ink);
  font-size: 16px;
}

.project-card span {
  margin-top: 4px;
}

.promo-video-section {
  width: min(var(--max), 100%);
  margin: clamp(56px, 8vw, 96px) auto 0;
}

.evidence-intro {
  max-width: 760px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.evidence-intro .section-label {
  margin-bottom: 14px;
}

.evidence-intro h3 {
  margin-bottom: 12px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.18;
}

.evidence-intro p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.4vw, 18px);
}

.promo-video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.promo-video-card {
  background: var(--white);
}

.promo-video-card.is-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.62fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.video-shell {
  position: relative;
  overflow: hidden;
  background: oklch(0.14 0 0);
}

.video-shell video {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.video-play {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid oklch(1 0 0 / 0.76);
  border-radius: 4px;
  background: oklch(0.12 0 0 / 0.72);
  color: var(--white);
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.promo-video-card.is-playing .video-play {
  display: none;
}

.promo-video-copy {
  padding-top: 14px;
}

.promo-video-card.is-featured .promo-video-copy {
  padding-top: 0;
}

.promo-video-copy span,
.promo-video-copy strong {
  display: block;
}

.promo-video-copy span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.promo-video-copy strong {
  margin-top: 8px;
  color: var(--ink);
  font-size: clamp(18px, 1.7vw, 24px);
  line-height: 1.3;
}

.promo-video-copy p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.training,
.process,
.personal {
  background: var(--surface);
}

.training-split {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.75fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.training-copy {
  display: grid;
  gap: 18px;
}

.training-route {
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.training-route h3 {
  margin: 10px 0 12px;
}

.training-route p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.training-evidence-section {
  width: min(var(--max), 100%);
  margin: clamp(48px, 7vw, 82px) auto 0;
}

.training-evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.training-evidence-grid img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.training-evidence-grid figcaption {
  margin-top: 8px;
  font-size: 13px;
}

.process-grid p {
  max-width: 660px;
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 20px);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.steps li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.5;
}

.steps span {
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
}

.workflow-grid {
  align-items: center;
}

.workflow-copy {
  max-width: 660px;
}

.workflow-copy .section-label,
.personal-copy .section-label,
.contact .section-label {
  margin-bottom: 18px;
}

.workflow-copy p,
.life-copy p,
.personal-copy p,
.contact-copy p {
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 20px);
}

.ai-stack {
  width: min(var(--max), 100%);
  margin: clamp(34px, 5vw, 64px) auto 0;
  padding-top: clamp(24px, 4vw, 42px);
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.ai-stack .evidence-intro {
  margin-bottom: 22px;
}

.ai-logo-wall {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid transparent;
  border-left: 1px solid transparent;
  background: var(--bg);
}

.ai-logo-item {
  min-height: 128px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 10px;
  border-right: 1px solid transparent;
  border-bottom: 1px solid transparent;
  background: var(--bg);
}

.ai-logo-item img {
  width: 62px;
  height: 62px;
  object-fit: contain;
}

.ai-logo-item span {
  color: oklch(0.58 0.012 245);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.25;
  text-align: center;
}

.life-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  gap: 22px;
}

.life-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.62fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.life-card:nth-child(even) {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.62fr);
}

.life-card:nth-child(even) .life-copy {
  order: 2;
}

.life-copy h3 {
  margin: 10px 0 12px;
}

.life-copy p:last-child {
  margin-bottom: 0;
}

.life-gallery {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
}

.life-card:nth-child(even) .life-gallery {
  grid-template-columns: 0.8fr 1.2fr;
}

.life-gallery img {
  height: clamp(220px, 28vw, 360px);
  object-fit: cover;
}

.life-gallery img:nth-child(2) {
  margin-top: clamp(28px, 4vw, 54px);
}

.personal {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 0.9fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: center;
}

.personal-image {
  justify-self: end;
  width: min(420px, 100%);
}

.personal-image img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 38%;
}

.personal-copy {
  max-width: 720px;
}

.trait-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.trait-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 17px;
}

.contact-inner {
  align-items: center;
}

.contact-copy {
  display: grid;
  gap: 20px;
  justify-items: start;
}

.contact-note {
  margin-top: 0;
  color: var(--muted);
  font-size: 14px !important;
}

.contact-action {
  cursor: pointer;
}

.contact-dialog {
  width: min(340px, calc(100% - 40px));
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.contact-dialog:focus,
.contact-dialog:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.contact-dialog::backdrop {
  background: oklch(0.12 0 0 / 0.58);
}

.contact-dialog-inner {
  position: relative;
  padding: 18px;
}

.contact-qr img,
noscript img {
  border-radius: 6px;
  border: 1px solid var(--line);
}

.contact-qr p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  padding: 28px var(--pad);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero {
    min-height: 82svh;
  }

  .hero-image {
    object-position: 52% 34%;
  }

  .hero-shade {
    background: oklch(0.08 0 0 / 0.52);
  }

  .intro-grid,
  .course-layout,
  .promo-video-card.is-featured,
  .training-split,
  .process-grid,
  .workflow-grid,
  .life-card,
  .life-card:nth-child(even),
  .contact-inner,
  .personal {
    grid-template-columns: 1fr;
  }

  .life-card:nth-child(even) .life-copy {
    order: 0;
  }

  .fact-strip,
  .project-grid,
  .promo-video-grid,
  .training-evidence-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ai-logo-wall {
    grid-template-columns: repeat(3, 1fr);
  }

  .quote-proof-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .personal-image {
    justify-self: start;
    width: min(460px, 100%);
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 12px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: 6px 10px;
    font-size: 12px;
    line-height: 1.2;
  }

  .hero-content {
    width: calc(100% - var(--pad) * 2);
    margin-bottom: 44px;
  }

  h1 {
    max-width: 9em;
  }

  .quote-proof {
    padding-top: 14px;
  }

  .quote-proof-inner::before {
    top: 16px;
    right: 0;
    opacity: 0.8;
  }

  .fact-strip,
  .project-grid,
  .promo-video-grid,
  .training-evidence-grid {
    grid-template-columns: 1fr;
  }

  .ai-logo-wall {
    grid-template-columns: repeat(2, 1fr);
  }

  .fact-strip div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
  }

  .fact-strip div:last-child {
    border-bottom: 0;
  }

  .course-layout,
  .training-split {
    gap: 28px;
  }

  .life-card {
    padding: 22px;
  }

  .life-gallery,
  .life-card:nth-child(even) .life-gallery {
    grid-template-columns: 1fr;
  }

  .life-gallery img {
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .life-gallery img:nth-child(2) {
    margin-top: 0;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}