:root {
  color-scheme: light;
  --paper: #F7F9FC;
  --white: #FFFFFF;
  --ink: #182A36;
  --muted: #536572;
  --blue: #2546EB;
  --sky: #DCEAF5;
  --sage: #D9E8DD;
  --line: #D6DFE6;
  --gutter: clamp(1.25rem, 4.6vw, 4.5rem);
  --radius: 1.5rem;
  font-family: "Avenir Next", Avenir, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; }
body, h1, h2, h3, p, figure { margin: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .24em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; border-radius: 3px; }
svg { display: block; flex-shrink: 0; }
img { display: block; max-width: 100%; }
p { max-width: 65ch; }
.wrap { width: min(100%, 1440px); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; top: .75rem; left: 1rem; z-index: 10; padding: .75rem 1rem; background: var(--white); transform: translateY(-180%); }
.skip:focus { transform: none; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 2rem; min-height: 108px; }
.wordmark { display: inline-flex; align-items: center; gap: .65rem; text-decoration: none; font-size: 1.4rem; font-weight: 750; letter-spacing: .04em; }
.brand-mark { width: 2rem; height: 2rem; color: var(--blue); }
.nav { display: flex; align-items: center; flex-wrap: wrap; gap: clamp(1rem, 2.1vw, 2rem); font-size: .88rem; font-weight: 600; }
.nav a { text-decoration: none; }
.nav a:hover { text-decoration: underline; }

.hero { padding-top: clamp(2rem, 4vw, 4.2rem); padding-bottom: clamp(4rem, 7vw, 7rem); }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 5.5vw, 5rem); align-items: center; }
.identity { display: flex; align-items: center; gap: .7rem; margin-bottom: 1.4rem; font-size: .85rem; font-weight: 600; }
.identity::before { content: ""; width: .5rem; height: .5rem; background: var(--blue); border-radius: 50%; }
h1 { max-width: 12ch; font-size: clamp(2.65rem, 5.2vw, 5.1rem); line-height: 1.04; letter-spacing: -.055em; font-weight: 620; }
.hero-copy > p { margin-top: 1.75rem; max-width: 39ch; font-size: clamp(1.05rem, 1.45vw, 1.2rem); line-height: 1.75; color: var(--muted); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1.35rem 1.6rem; margin-top: 2rem; }
.primary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .8rem 1.25rem; border-radius: .6rem; background: var(--blue); color: var(--white); font-size: .88rem; font-weight: 600; text-decoration: none; }
.primary-link:hover { background: #1D39C7; text-decoration: none; }
.text-link { font-size: .9rem; font-weight: 600; }
.hero-copy .hero-note { margin-top: 1.35rem; max-width: 45ch; font-size: .78rem; line-height: 1.65; }

.hero-figure { position: relative; background: var(--sky); border-radius: 2rem; overflow: hidden; }
.hero-scene { padding: clamp(1.5rem, 3vw, 2.7rem); }
.scene-label { font-size: .75rem; font-weight: 600; color: #3A596E; }
.speech { display: flex; align-items: center; gap: 1.1rem; padding: 1.4rem 1.2rem; margin-top: 1.5rem; background: var(--white); border-radius: 1rem 1rem 1rem .25rem; box-shadow: 0 8px 25px #182A3606; }
.speech-icon { display: flex; align-items: center; justify-content: center; width: 2.5rem; height: 2.5rem; flex: 0 0 2.5rem; border-radius: 50%; background: var(--paper); color: var(--blue); }
.speech-text { font-size: clamp(1.05rem, 1.8vw, 1.3rem); line-height: 1.4; font-weight: 550; letter-spacing: -.015em; }
.icon { width: 1.5rem; height: 1.5rem; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.voice-path { position: relative; display: flex; justify-content: center; align-items: center; min-height: 104px; }
.voice-path::before { content: ""; position: absolute; top: 0; bottom: 0; width: 1px; background: #8DAEC7; }
.review-pill { position: relative; display: flex; align-items: center; gap: .5rem; padding: .6rem .85rem; border-radius: 2rem; color: var(--ink); background: #EFF5FA; font-size: .72rem; font-weight: 600; }
.review-pill .icon { width: 1rem; height: 1rem; color: var(--blue); }
.cue-board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .65rem; }
.cue { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .8rem; min-height: 124px; padding: 1rem .4rem; border-radius: .8rem; background: var(--white); font-size: .76rem; font-weight: 600; text-align: center; }
.cue .icon { width: 2.4rem; height: 2.4rem; stroke-width: 1.3; }
.cue-blue { color: var(--blue); }
.cue-green { background: var(--sage); color: #264D3C; }
.cue-ink { background: var(--ink); color: var(--white); }
.scene-footnote { margin-top: 1.5rem; font-size: .72rem; color: #3A596E; line-height: 1.5; }
.hero-figure figcaption { padding: 1rem clamp(1.5rem, 3vw, 2.7rem); border-top: 1px solid #B7CCDDE0; color: #3A596E; font-size: .7rem; line-height: 1.5; }

.section-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 2.5rem; padding-block: 1.7rem 3.1rem; border-top: 1px solid var(--line); }
h2 { font-size: clamp(2rem, 3.3vw, 3rem); line-height: 1.14; letter-spacing: -.04em; font-weight: 600; }
.section-heading p { max-width: 44ch; color: var(--muted); font-size: 1rem; line-height: 1.75; }
.research { padding-bottom: clamp(4.5rem, 7vw, 7rem); }
.project { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: clamp(2rem, 5.5vw, 5rem); padding-block: 1rem 4.2rem; }
.project + .project { padding-top: 1.4rem; }
.project-reverse .project-visual { grid-column: 2; grid-row: 1; }
.project-reverse .project-copy { grid-column: 1; grid-row: 1; }
.project-copy { max-width: 33rem; }
.stage { display: inline-block; margin-bottom: 1rem; color: var(--muted); font-size: .75rem; line-height: 1.5; }
.stage::before { content: ""; display: inline-block; width: .45rem; height: .45rem; border-radius: 50%; margin-right: .5rem; background: currentColor; vertical-align: .05em; }
h3 { font-size: clamp(1.7rem, 2.9vw, 2.6rem); line-height: 1.18; letter-spacing: -.035em; font-weight: 600; }
.project-copy > p { margin-top: 1.2rem; color: var(--muted); font-size: .98rem; line-height: 1.85; }
details { margin-top: 1.5rem; }
summary { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; width: fit-content; max-width: 100%; cursor: pointer; list-style: none; border-bottom: 1px solid var(--line); padding-bottom: .45rem; font-size: .83rem; font-weight: 600; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 1.1rem; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin-top: .9rem; color: var(--muted); font-size: .87rem; line-height: 1.8; }
.project-visual { min-width: 0; border-radius: var(--radius); overflow: hidden; }
.project-visual figcaption { padding: 1rem 1.5rem; font-size: .7rem; line-height: 1.5; }
.visual-classroom { background: var(--ink); color: var(--white); }
.classroom-scene { padding: clamp(1.5rem, 3vw, 2.5rem); }
.visual-kicker { display: flex; justify-content: space-between; align-items: center; gap: 1rem; font-size: .68rem; line-height: 1.6; color: #D9E5EC; }
.tiny-dot { width: .45rem; height: .45rem; border-radius: 50%; background: #AFC8BC; }
.classroom-instruction { margin-top: 2.8rem; font-size: clamp(1.3rem, 2.2vw, 1.7rem); line-height: 1.4; font-weight: 500; }
.visual-cue-row { display: grid; grid-template-columns: 1.35fr 1fr; align-items: stretch; gap: .8rem; margin-top: 1.2rem; }
.book-cue { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .85rem; min-height: 146px; border-radius: .65rem; background: var(--sky); color: var(--ink); font-size: .8rem; }
.book-cue .icon { width: 3.7rem; height: 3.7rem; stroke-width: 1.2; }
.direction-cue { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: .85rem; background: var(--sage); color: #264D3C; border-radius: .65rem; font-size: .8rem; }
.direction-cue .icon { width: 3rem; height: 3rem; stroke-width: 1.3; }
.teacher-line { display: flex; align-items: center; gap: .5rem; margin-top: 1.5rem; color: #D9E5EC; font-size: .69rem; }
.teacher-line .icon { width: 1rem; height: 1rem; }
.visual-classroom figcaption { border-top: 1px solid #405561; color: #D9E5EC; }

.visual-workflow { background: var(--sage); color: #264D3C; }
.workflow-scene { display: grid; grid-template-columns: .36fr 1fr; gap: 1rem; align-items: center; padding: 2.3rem 1.75rem; }
.workflow-rail { display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 0; min-width: 0; }
.rail-step { display: flex; flex-direction: column; align-items: center; gap: .4rem; font-size: .65rem; line-height: 1.4; text-align: center; }
.rail-step .icon { width: 1.45rem; height: 1.45rem; }
.rail-line { width: 1px; height: 1.6rem; margin-block: .65rem; background: #9DBBA7; }
.draft-sheet { min-width: 0; padding: 1.35rem; background: var(--white); color: var(--ink); border-radius: .7rem; box-shadow: 0 10px 30px #264D3C09; }
.sheet-heading { font-size: .94rem; font-weight: 650; line-height: 1.4; }
.sheet-status { display: inline-block; margin-top: .6rem; padding: .3rem .5rem; border-radius: .25rem; background: #F1F4FB; color: #46548A; font-size: .59rem; line-height: 1.4; }
.sheet-rule { height: 1px; margin-block: 1rem; background: var(--line); }
.sheet-label { margin-top: .9rem; font-size: .66rem; font-weight: 600; line-height: 1.4; }
.text-line { display: block; width: 100%; height: 5px; margin-top: .55rem; background: #E5EAF0; border-radius: 3px; }
.text-line.short { width: 69%; }
.text-line.medium { width: 84%; }
.source-row { display: flex; gap: .4rem; align-items: center; margin-top: 1.2rem; padding-top: .8rem; border-top: 1px solid var(--line); font-size: .62rem; line-height: 1.5; color: var(--muted); }
.source-row .icon { width: 1rem; height: 1rem; color: #507C61; }
.visual-workflow figcaption { border-top: 1px solid #BED1C3; color: #395E48; }

.visual-assessment { background: #E6ECFF; color: var(--ink); }
.assessment-scene { padding: 2.1rem; }
.assessment-top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
.assessment-heading { font-size: .9rem; font-weight: 650; }
.people { display: flex; padding-left: .4rem; }
.people span { display: grid; place-items: center; width: 1.8rem; height: 1.8rem; margin-left: -.4rem; border: 2px solid #E6ECFF; border-radius: 50%; background: #BFCDF7; color: #254293; }
.people span:nth-child(2) { background: #D9E8DD; color: #395E48; }
.people span:nth-child(3) { background: #DCEAF5; color: #3A596E; }
.people .icon { width: 1rem; height: 1rem; stroke-width: 1.5; }
.assessment-sheet { padding: 1.3rem; border-radius: .7rem; background: var(--white); }
.assessment-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .85rem; padding-block: .95rem; }
.assessment-row + .assessment-row { border-top: 1px solid #E7EBF3; }
.assessment-row > .icon { width: 1.3rem; height: 1.3rem; color: var(--blue); }
.assessment-row p { font-size: .73rem; line-height: 1.45; }
.assessment-row small { display: block; margin-top: .2rem; color: var(--muted); font-size: .6rem; }
.step-dot { width: .4rem; height: .4rem; border-radius: 50%; background: #8B9CCC; }
.assessment-bottom { display: flex; align-items: center; gap: .5rem; margin-top: 1rem; font-size: .66rem; color: #405380; }
.assessment-bottom .icon { width: 1rem; height: 1rem; }
.visual-assessment figcaption { border-top: 1px solid #C5D0F2; color: #405380; }

.project-mobility { grid-template-columns: 1fr 1.1fr; padding: 2.4rem; border: 1px solid var(--line); border-radius: var(--radius); gap: 2.5rem; }
.project-mobility h3 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
.project-mobility .project-copy > p { font-size: .9rem; }
.mobility-figure { padding: 1rem 0; }
.system-diagram { position: relative; display: grid; grid-template-columns: 1fr auto 1fr; gap: .8rem; align-items: center; }
.system-node { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .65rem; min-height: 120px; padding: .85rem; background: var(--sky); border-radius: .8rem; text-align: center; font-size: .74rem; line-height: 1.4; }
.system-node .icon { width: 2.1rem; height: 2.1rem; stroke-width: 1.5; }
.system-node:nth-child(3) { background: var(--sage); color: #264D3C; }
.system-connector { width: 1.6rem; color: #657C8B; }
.system-control { grid-column: 1 / -1; margin: .15rem auto 0; padding: .8rem 1.1rem; background: var(--ink); color: var(--white); border-radius: .6rem; font-size: .75rem; text-align: center; line-height: 1.5; }
.mobility-figure figcaption { margin-top: 1rem; color: var(--muted); font-size: .65rem; text-align: center; }

.approach { padding-block: clamp(4rem, 7vw, 6.5rem); background: var(--ink); color: var(--white); }
.approach .section-heading { border: 0; padding-top: 0; }
.approach .section-heading p { color: #C6D6E0; }
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 3rem; padding-top: 1rem; }
.principle { padding-top: 1.6rem; border-top: 1px solid #4B5D68; }
.principle > .icon { width: 1.8rem; height: 1.8rem; margin-bottom: 1.8rem; color: #BBCCD8; }
.principle h3 { max-width: 16ch; font-size: 1.35rem; line-height: 1.3; letter-spacing: -.02em; }
.principle p { margin-top: 1rem; color: #C6D6E0; font-size: .88rem; line-height: 1.8; }

.company { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 7vw, 7rem); padding-block: clamp(4rem, 7vw, 7rem); }
.company-copy > p { margin-top: 1.4rem; color: var(--muted); font-size: 1rem; line-height: 1.85; }
.company-facts { margin: 0; align-self: center; }
.fact { padding-block: .9rem; border-bottom: 1px solid var(--line); }
.fact:first-child { border-top: 1px solid var(--line); }
.fact dt { color: var(--muted); font-size: .73rem; }
.fact dd { margin: .3rem 0 0; font-size: .93rem; line-height: 1.65; }
.fact a { font-weight: 600; }

.contact { padding-block: clamp(3.5rem, 5vw, 5rem); background: var(--sky); }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 2rem; }
.contact h2 { max-width: 14ch; }
.contact-copy p { max-width: 44ch; margin-bottom: 1.5rem; color: #3A596E; font-size: .97rem; line-height: 1.8; }
.email-link { display: inline-block; font-size: clamp(1.35rem, 2.65vw, 2.4rem); line-height: 1.3; letter-spacing: -.035em; text-decoration-thickness: 1px; }
.site-footer { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; padding-block: 2.2rem; color: var(--muted); font-size: .75rem; line-height: 1.9; }
.footer-name { color: var(--ink); font-weight: 700; font-size: .9rem; margin-bottom: .45rem; }
.footer-legal { justify-self: end; }
.footer-legal address { font-style: normal; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .8rem; grid-column: 1 / -1; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .68rem; }
.footer-bottom a { color: var(--ink); }


@media (min-width: 1500px) { .hero { padding-top: 4rem; } }
@media (max-width: 1100px) {
  .hero-grid { gap: 2.5rem; }
  .hero-scene { padding: 1.5rem; }
  .hero-figure figcaption { padding-inline: 1.5rem; }
  .speech { padding: 1.2rem .9rem; gap: .75rem; }
  .speech-text { font-size: 1rem; }
  .voice-path { min-height: 85px; }
  .cue { min-height: 108px; }
  .project { gap: 2.5rem; }
  .workflow-scene { padding: 1.8rem 1.2rem; gap: .75rem; }
  .draft-sheet { padding: 1rem; }
  .principles { gap: 2rem; }
}

@media (max-width: 820px) {
  .site-header { min-height: 96px; gap: 1.3rem; }
  .nav { gap: 1rem; font-size: .82rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-copy { max-width: 40rem; }
  h1 { max-width: 14ch; font-size: clamp(3.1rem, 8vw, 4.7rem); }
  .hero-copy > p { max-width: 49ch; }
  .hero-figure { max-width: 36rem; width: 100%; }
  .hero-scene { padding: 2rem; }
  .hero-figure figcaption { padding-inline: 2rem; }
  .speech { padding: 1.3rem; }
  .speech-text { font-size: 1.2rem; }
  .cue { min-height: 128px; }
  .section-heading { grid-template-columns: 1fr; gap: 1.2rem; padding-bottom: 2.5rem; }
  .project, .project-mobility { grid-template-columns: 1fr; gap: 1.75rem; padding-bottom: 3.8rem; }
  .project-reverse .project-visual, .project-reverse .project-copy { grid-column: auto; grid-row: auto; }
  .project-copy { max-width: 42rem; }
  .project-visual { width: 100%; max-width: 37rem; }
  .project-mobility { padding: 2rem; gap: 1rem; }
  .project-mobility .mobility-figure { max-width: 32rem; width: 100%; margin: auto; }
  .principles { gap: 1.8rem; }
  .principle h3 { font-size: 1.15rem; }
  .principle p { font-size: .82rem; }
  .company { grid-template-columns: 1fr; }
  .company-copy { max-width: 40rem; }
  .company-facts { max-width: 38rem; width: 100%; }
  .contact-inner { grid-template-columns: 1fr; }
  .contact h2 { max-width: 20ch; }
  .contact-copy p { max-width: 52ch; }
  .email-link { font-size: 2rem; }
}

@media (max-width: 580px) {
  .site-header { align-items: flex-start; flex-direction: column; gap: 1.25rem; padding-block: 1.35rem; }
  .wordmark { font-size: 1.2rem; }
  .brand-mark { width: 1.7rem; height: 1.7rem; }
  .nav { width: 100%; gap: .65rem 1rem; font-size: .76rem; }
  .hero { padding-top: 2.6rem; }
  h1 { max-width: 12ch; font-size: clamp(2.7rem, 10.1vw, 3.8rem); }
  .identity { font-size: .75rem; margin-bottom: 1.2rem; }
  .hero-copy > p { margin-top: 1.35rem; font-size: 1rem; }
  .hero-actions { gap: 1.2rem; margin-top: 1.6rem; }
  .primary-link { font-size: .8rem; }
  .text-link { font-size: .8rem; }
  .hero-figure { border-radius: 1.2rem; }
  .hero-scene { padding: 1.25rem; }
  .hero-figure figcaption { padding: .9rem 1.25rem; }
  .scene-label { font-size: .7rem; }
  .speech { padding: 1rem .8rem; gap: .65rem; }
  .speech-icon { width: 2rem; height: 2rem; flex-basis: 2rem; }
  .speech-text { font-size: .96rem; }
  .cue-board { gap: .4rem; }
  .cue { min-height: 104px; gap: .7rem; font-size: .64rem; }
  .cue .icon { width: 2rem; height: 2rem; }
  .review-pill { font-size: .63rem; padding-inline: .7rem; }
  .voice-path { min-height: 78px; }
  .section-heading { padding-top: 1.5rem; gap: 1.1rem; }
  .section-heading p { font-size: .92rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.9rem; }
  .project { padding-bottom: 3rem; }
  .project + .project { padding-top: 1rem; }
  .project-copy > p { font-size: .92rem; }
  .project-visual { border-radius: 1rem; }
  .classroom-scene { padding: 1.4rem; }
  .classroom-instruction { margin-top: 2rem; }
  .visual-cue-row { gap: .6rem; }
  .book-cue, .direction-cue { min-height: 124px; }
  .book-cue .icon { width: 3rem; height: 3rem; }
  .visual-kicker { font-size: .62rem; }
  .workflow-scene { grid-template-columns: .34fr 1fr; padding: 1.5rem 1rem; gap: .6rem; }
  .rail-step { font-size: .57rem; }
  .draft-sheet { padding: 1rem; }
  .sheet-heading { font-size: .8rem; }
  .sheet-status { font-size: .54rem; }
  .assessment-scene { padding: 1.35rem; }
  .assessment-sheet { padding: 1rem; }
  .assessment-heading { font-size: .85rem; }
  .assessment-row { gap: .65rem; }
  .project-mobility { padding: 1.5rem; }
  .project-mobility h3 { font-size: 1.7rem; }
  .system-diagram { gap: .45rem; }
  .system-node { min-height: 108px; padding: .7rem .4rem; font-size: .64rem; }
  .system-connector { width: 1.2rem; }
  .system-control { font-size: .66rem; }
  .principles { grid-template-columns: 1fr; gap: 2.2rem; }
  .principle { padding-top: 1.4rem; }
  .principle > .icon { margin-bottom: 1rem; }
  .principle h3 { max-width: none; font-size: 1.3rem; }
  .principle p { font-size: .9rem; }
  .company-copy > p { font-size: .95rem; }
  .contact h2 { font-size: 2.1rem; max-width: 15ch; }
  .email-link { font-size: clamp(1.45rem, 7vw, 2rem); }
  .site-footer { grid-template-columns: 1fr; gap: 1.4rem; }
  .footer-legal { justify-self: start; }
  .footer-bottom { padding-top: 1.3rem; }
}

@media (max-width: 360px) {
  .nav { gap: .65rem .72rem; font-size: .72rem; }
  h1 { font-size: 2.65rem; }
  .hero-scene { padding: 1rem; }
  .hero-figure figcaption { padding-inline: 1rem; }
  .speech-text { font-size: .86rem; }
  .project-mobility { padding: 1.2rem; }
  .workflow-scene { padding-inline: .8rem; }
  .draft-sheet { padding: .8rem; }
  .assessment-scene { padding: 1rem; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .nav, .hero-actions, .skip { display: none; }
  .hero, .research, .company, .approach, .contact { padding-block: 2rem; }
  .project, .principle, .company { break-inside: avoid; }
  body, .approach { background: white; color: #182A36; }
  .approach .section-heading p, .principle p { color: #536572; }
}