:root {
  --ink: #102b38;
  --ink-soft: #50646d;
  --canvas: #f3f5f0;
  --panel: #ffffff;
  --line: #d7dfda;
  --teal: #17737a;
  --teal-dark: #0e4552;
  --amber: #e8a145;
  --amber-pale: #fbf0df;
  --radius: 18px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--canvas);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { min-width: 320px; margin: 0; background: var(--canvas); }
button, input, select { font: inherit; }
button, input, select { accent-color: var(--teal); }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: Georgia, "Songti SC", serif; font-weight: 500; letter-spacing: -.045em; }

.skip-link { position: fixed; z-index: 20; top: -5rem; left: 1rem; padding: .75rem 1rem; color: #fff; border-radius: 8px; background: var(--ink); }
.skip-link:focus { top: 1rem; }
.site-header { display: flex; align-items: center; gap: 1.8rem; width: min(1160px, calc(100% - 3rem)); min-height: 78px; margin: 0 auto; }
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); font-size: .71rem; font-weight: 800; letter-spacing: .13em; line-height: 1.08; text-decoration: none; }
.brand-mark { display: grid; width: 28px; gap: 3px; }
.brand-mark i { display: block; height: 5px; border-radius: 2px; background: var(--teal-dark); transform: skewX(-24deg); }
.brand-mark i:nth-child(2) { background: var(--amber); }
.brand-mark i:nth-child(3) { background: #8ab5ad; }
nav { display: flex; gap: 1.35rem; margin-left: auto; }
nav a { padding: .45rem 0; color: var(--ink-soft); border-bottom: 1px solid transparent; font-size: .86rem; text-decoration: none; }
nav a:hover, nav a:focus-visible, nav a.active { color: var(--teal-dark); border-color: var(--teal); }
.course-tag { padding: .42rem .72rem; color: var(--teal-dark); border: 1px solid var(--line); border-radius: 999px; font-size: .76rem; font-weight: 700; white-space: nowrap; }
main { width: min(1160px, calc(100% - 3rem)); margin: 0 auto; }
.eyebrow, .result-kicker { margin-bottom: .8rem; color: var(--teal); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }

.hero { display: grid; grid-template-columns: 1.38fr .62fr; gap: 4rem; padding: 5.3rem 0 4.7rem; border-bottom: 1px solid var(--line); }
h1 { margin-bottom: .85rem; font-size: clamp(2.45rem, 5vw, 4.9rem); line-height: 1.01; }
.course-name { margin-bottom: 1.45rem; color: var(--teal-dark); font-size: 1.16rem; font-weight: 750; }
.intro-text { max-width: 590px; margin-bottom: 1.5rem; color: var(--ink-soft); font-size: 1.06rem; line-height: 1.82; }
.text-link { display: inline-flex; gap: .55rem; align-items: center; color: var(--teal-dark); font-size: .92rem; font-weight: 800; text-decoration: none; }
.text-link span { color: var(--amber); font-size: 1.25rem; }
.text-link:hover { color: var(--teal); }
.hero-side { align-self: end; }
.course-facts { margin: 0; border-top: 2px solid var(--teal-dark); }
.course-facts div { display: flex; justify-content: space-between; gap: 1rem; padding: .89rem 0; border-bottom: 1px solid var(--line); }
.course-facts dt { color: var(--ink-soft); font-size: .84rem; }
.course-facts dd { margin: 0; font-weight: 800; }
.course-facts small { color: var(--teal); font-size: .58rem; letter-spacing: .09em; }
.hero-note { margin: 1.2rem 0 0; color: var(--ink-soft); font-size: .82rem; line-height: 1.65; }

.overview-section, .content-section { padding: 4.9rem 0; border-bottom: 1px solid var(--line); }
.pale-section { position: relative; margin-inline: calc((100vw - min(1160px, calc(100vw - 3rem))) / -2); padding-inline: max(1.5rem, calc((100vw - 1160px) / 2)); background: #eaf1ee; }
.section-heading { display: grid; grid-template-columns: 210px 1fr; gap: 0 1.5rem; align-items: baseline; margin-bottom: 2rem; }
.section-heading .eyebrow { grid-row: span 2; align-self: start; padding-top: .45rem; }
.section-heading h2, .content-section h2 { margin-bottom: .52rem; font-size: clamp(1.85rem, 3.2vw, 2.7rem); line-height: 1.12; }
.section-heading > div > p, .section-heading > p:last-child { max-width: 700px; margin-bottom: 0; color: var(--ink-soft); line-height: 1.7; }
.challenge-grid, .path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }
.challenge-card, .path-grid article { min-height: 230px; padding: 1.55rem; background: var(--panel); }
.challenge-card strong { display: block; margin-bottom: 1.7rem; color: var(--teal-dark); font-family: Georgia, "Songti SC", serif; font-size: 3rem; font-weight: 500; letter-spacing: -.06em; }
.challenge-card h3, .path-grid h3 { margin-bottom: .65rem; font-size: 1rem; }
.challenge-card p, .path-grid p { margin-bottom: 0; color: var(--ink-soft); font-size: .88rem; line-height: 1.7; }
.path-grid article { min-height: 218px; background: rgba(255, 255, 255, .62); }
.path-grid span, .goal-grid span, .flow-grid span { display: inline-block; margin-bottom: 2.2rem; color: var(--teal); font-size: .75rem; font-weight: 800; letter-spacing: .11em; }
.lab-links { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.lab-card { display: flex; flex-direction: column; min-height: 295px; padding: 2rem; border-radius: var(--radius); text-decoration: none; }
.lab-card span { margin-bottom: 2.4rem; font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.lab-card h3 { margin-bottom: .8rem; font-family: Georgia, "Songti SC", serif; font-size: 2rem; font-weight: 500; letter-spacing: -.04em; line-height: 1.09; }
.lab-card p { max-width: 330px; margin-bottom: auto; font-size: .9rem; line-height: 1.7; }
.lab-card b { display: flex; justify-content: space-between; padding-top: 1.4rem; border-top: 1px solid currentColor; font-size: .86rem; }
.lab-card i { font-size: 1.15rem; font-style: normal; }
.dark-lab { color: #edf6f3; background: var(--ink); }
.dark-lab span { color: #e9a64e; }.dark-lab p { color: #bed0cd; }
.amber-lab { color: #523b1b; background: var(--amber-pale); }.amber-lab span { color: #9a6217; }.amber-lab p { color: #6f604d; }
.lab-card:hover { transform: translateY(-2px); transition: transform .18s ease; }
.target-strip { display: grid; grid-template-columns: .78fr 1.22fr; gap: 3rem; padding: 3rem 0 5.2rem; }
.target-strip h2 { margin-bottom: .55rem; font-size: 1.9rem; line-height: 1.15; }.target-strip p:not(.eyebrow) { color: var(--ink-soft); font-size: .87rem; line-height: 1.65; }
.target-numbers { display: grid; grid-template-columns: repeat(4, 1fr); align-self: center; gap: .8rem; }
.target-numbers div { padding: .8rem .45rem; border-left: 1px solid var(--line); }.target-numbers strong { display: block; color: var(--teal-dark); font-family: Georgia, "Songti SC", serif; font-size: 2rem; font-weight: 500; letter-spacing: -.05em; }.target-numbers span { display: block; margin-top: .25rem; color: var(--ink-soft); font-size: .73rem; }

.page-hero { max-width: 850px; padding: 4.8rem 0 3.7rem; border-bottom: 1px solid var(--line); }.page-hero h1 { margin-bottom: 1.2rem; }.page-hero > p:last-child { max-width: 620px; margin-bottom: 0; color: var(--ink-soft); font-size: 1.08rem; line-height: 1.8; }.lab-hero { padding-bottom: 3.4rem; }
.split-content { display: grid; grid-template-columns: 210px 1fr; gap: 1.5rem; }.split-content h2 { margin-bottom: 0; }.prose { max-width: 730px; }.prose p { color: var(--ink-soft); font-size: 1rem; line-height: 1.9; }.prose p:last-child { margin-bottom: 0; }
.goal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }.goal-grid article { min-height: 225px; padding: 1.45rem; background: rgba(255,255,255,.72); }.goal-grid span { margin-bottom: 2rem; }.goal-grid h3, .flow-grid h3 { margin-bottom: .65rem; font-size: 1rem; }.goal-grid p, .flow-grid p { margin-bottom: 0; color: var(--ink-soft); font-size: .88rem; line-height: 1.7; }
.content-steps { max-width: 850px; margin: 0; padding: 0; list-style: none; }.content-steps li { display: grid; grid-template-columns: 76px 1fr; gap: 1.4rem; padding: 1.5rem 0; border-top: 1px solid var(--line); }.content-steps li:last-child { border-bottom: 1px solid var(--line); }.content-steps span { color: var(--teal); font-size: .78rem; font-weight: 800; letter-spacing: .1em; }.content-steps h3 { margin-bottom: .5rem; font-size: 1.06rem; }.content-steps p { max-width: 650px; margin-bottom: 0; color: var(--ink-soft); line-height: 1.75; }
.timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }.timeline div { min-height: 230px; padding: 1.25rem; background: #fff; }.timeline time { display: block; margin-bottom: 2rem; color: var(--teal); font-size: .72rem; font-weight: 800; letter-spacing: .06em; }.timeline h3 { margin-bottom: .65rem; font-size: .95rem; }.timeline p { margin-bottom: 0; color: var(--ink-soft); font-size: .82rem; line-height: 1.65; }
.reference-panel { display: grid; grid-template-columns: .68fr 1.32fr; gap: 2rem; padding: 3.4rem 0 5rem; }.reference-panel h2 { margin-bottom: 0; font-size: 1.85rem; }.reference-panel ul { margin: 0; padding: 0; list-style: none; }.reference-panel li { padding: .85rem 0; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: .92rem; }

.lab-section { padding-top: 3rem; }.visual-grid, .ai-grid { display: grid; grid-template-columns: 1.5fr .72fr; gap: 1.25rem; }.visual-stage { padding: 1rem; border-radius: var(--radius); background: var(--ink); box-shadow: 0 16px 32px rgba(14,69,82,.12); }.stage-topline { display: flex; justify-content: space-between; padding: .35rem .45rem .95rem; color: #d7e8e5; font-size: .75rem; letter-spacing: .08em; }.stage-topline span:last-child { color: #f1b25f; }canvas { display: block; width: 100%; height: auto; border-radius: 11px; background: #0b2631; }.stage-note { margin: .85rem .45rem .25rem; color: #aec2c2; font-size: .76rem; line-height: 1.5; }
.control-panel, .design-form, .design-result { padding: 1.45rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }fieldset { margin: 0 0 1.4rem; padding: 0 0 1.3rem; border: 0; border-bottom: 1px solid var(--line); }fieldset:last-of-type { margin-bottom: 1.25rem; }legend, label { display: block; margin-bottom: .52rem; color: var(--ink); font-size: .84rem; font-weight: 750; }legend { margin-bottom: .8rem; }select { width: 100%; height: 41px; margin-bottom: .9rem; padding: 0 .75rem; color: var(--ink); border: 1px solid #cbd6d2; border-radius: 9px; background: #fff; }select:last-child { margin-bottom: 0; }.choice-row { display: grid; grid-template-columns: repeat(3,1fr); gap: .45rem; }.choice { min-height: 38px; color: var(--teal-dark); border: 1px solid #cbd6d2; border-radius: 8px; background: #fff; cursor: pointer; }.choice.active, .choice:hover { color: #fff; border-color: var(--teal); background: var(--teal); }.range-label { display: flex; align-items: center; justify-content: space-between; }output { color: var(--teal); font-size: .85rem; font-weight: 800; }input[type="range"] { width: 100%; margin: .3rem 0 0; }.indices { display: grid; grid-template-columns: repeat(3,1fr); gap: .55rem; }.indices div { padding: .65rem .45rem; border-radius: 9px; background: #eff5f2; text-align: center; }.indices span { display: block; color: var(--ink-soft); font-size: .68rem; }.indices strong { color: var(--teal-dark); font-size: 1.35rem; }
.design-form { display: flex; flex-direction: column; justify-content: center; }.design-form label { margin-top: .1rem; }.design-form select { margin-bottom: 1.2rem; }.primary-button { display: flex; align-items: center; justify-content: space-between; width: 100%; margin-top: .9rem; padding: .9rem 1rem; color: #fff; border: 0; border-radius: 9px; background: var(--teal-dark); cursor: pointer; font-weight: 750; }.primary-button:hover, .primary-button:focus-visible { background: var(--teal); }.primary-button span { color: var(--amber); font-size: 1.25rem; }.design-result { min-height: 330px; border-color: #d7c39f; background: var(--amber-pale); }.result-kicker { color: #9a6217; }.design-result h2 { margin-bottom: .7rem; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 1.25rem; font-weight: 800; letter-spacing: 0; }.result-summary { color: #5e594f; line-height: 1.7; }.recommendation-list { margin: 1.25rem 0 1rem; }.recommendation-list div { display: grid; grid-template-columns: 86px 1fr; gap: .7rem; padding: .65rem 0; border-top: 1px solid #e4d5bd; }.recommendation-list dt { color: #806d51; font-size: .78rem; }.recommendation-list dd { margin: 0; color: #3a352d; font-size: .9rem; font-weight: 650; line-height: 1.5; }.result-disclaimer { margin: 1.15rem 0 0; color: #806d51; font-size: .72rem; line-height: 1.55; }
.flow-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }.flow-grid article { min-height: 220px; padding: 1.45rem; background: rgba(255,255,255,.64); }.flow-grid span { margin-bottom: 2rem; }.question-strip { max-width: 900px; padding: 4.5rem 0 5.2rem; }.question-strip h2 { margin-bottom: 1.35rem; font-size: clamp(1.85rem, 3.2vw, 2.8rem); line-height: 1.22; }
footer { display: flex; justify-content: space-between; width: min(1160px, calc(100% - 3rem)); margin: 0 auto; padding: 1.6rem 0 2.1rem; color: var(--ink-soft); border-top: 1px solid var(--line); font-size: .78rem; }

@media (max-width: 900px) { nav { gap: .8rem; } nav a { font-size: .8rem; }.goal-grid, .timeline, .flow-grid { grid-template-columns: repeat(2,1fr); }.target-strip { grid-template-columns: 1fr; }.target-numbers { max-width: 650px; }.split-content { grid-template-columns: 180px 1fr; } }
@media (max-width: 720px) { .site-header { width: min(100% - 2rem, 1160px); gap: 1rem; }.site-header nav { display: none; }.course-tag { margin-left: auto; } main { width: min(100% - 2rem, 1160px); }.hero, .visual-grid, .ai-grid, .split-content, .reference-panel { grid-template-columns: 1fr; gap: 2rem; }.hero { padding: 3.4rem 0; }.overview-section, .content-section { padding: 3.5rem 0; }.pale-section { margin-inline: -1rem; padding-inline: 1rem; }.section-heading { grid-template-columns: 1fr; gap: 0; }.section-heading .eyebrow { grid-row: auto; padding-top: 0; }.challenge-grid, .path-grid, .lab-links { grid-template-columns: 1fr; }.challenge-card, .path-grid article { min-height: auto; }.lab-card { min-height: 260px; }.target-numbers { grid-template-columns: repeat(2,1fr); }.page-hero { padding: 3.3rem 0 2.9rem; }.goal-grid, .timeline, .flow-grid { grid-template-columns: 1fr; }.timeline div { min-height: auto; }.content-steps li { grid-template-columns: 48px 1fr; gap: .85rem; }.reference-panel { padding: 3.5rem 0; }.visual-stage { padding: .65rem; }.control-panel, .design-form, .design-result { padding: 1.1rem; } footer { flex-direction: column; gap: .5rem; width: min(100% - 2rem, 1160px); } }