/* Native CSS art direction. DESIGN_VARIANCE 6 / MOTION_INTENSITY 3 / VISUAL_DENSITY 4.
   Layer scale: normal flow 0, mobile navigation 10, sticky header 20, skip link 30. */
:root {
  color-scheme: light dark;
  --background: #f7f7f5;
  --surface: #efefec;
  --raised: #fbfbfa;
  --text: #222524;
  --muted: #636762;
  --line: #d5d7d1;
  --accent: #b63b2e;
  --accent-surface: #f2e6e2;
  --button: #b63b2e;
  --on-button: #fffaf8;
  --focus: #a43226;
  --radius: 4px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #181a1b;
    --surface: #222425;
    --raised: #202223;
    --text: #f0f1ed;
    --muted: #b4b7b1;
    --line: #414442;
    --accent: #ef9284;
    --accent-surface: #332725;
    --focus: #ffae9e;
  }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 96px; }
body { margin: 0; background: var(--background); color: var(--text); font-size: 16px; line-height: 1.8; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea, summary { -webkit-tap-highlight-color: transparent; }
button, a { touch-action: manipulation; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, ul, ol, dl, dd, blockquote { margin: 0; }
h1, h2, h3 { font-weight: 650; letter-spacing: -.045em; line-height: 1.4; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 4.3vw, 3.75rem); }
h2 { font-size: clamp(1.8rem, 2.8vw, 2.6rem); }
h3 { font-size: 1.4rem; }
p { color: var(--muted); }
ul, ol { padding: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; }
::selection { color: var(--background); background: var(--accent); }
.container { width: min(1280px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; left: 20px; top: -100px; padding: 10px 20px; z-index: 30; background: var(--raised); border: 2px solid var(--accent); }
.skip-link:focus { top: 10px; }
.site-header { position: sticky; top: 0; z-index: 20; background: var(--background); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; justify-content: space-between; gap: 32px; align-items: center; height: 80px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; background: var(--button); color: var(--on-button); border-radius: var(--radius); overflow: hidden; }
.brand-mark > span { font-family: Arial, sans-serif; font-size: 44px; font-weight: 700; line-height: 1; transform: translateY(5px); }
.brand-name { font-size: 19px; font-weight: 700; line-height: 1.3; letter-spacing: .03em; }
.brand-name > span { display: block; font-family: Arial, sans-serif; font-size: 10px; letter-spacing: .2em; margin-top: 4px; font-weight: 600; }
.desktop-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; white-space: nowrap; }
.desktop-nav a { font-size: 14px; color: var(--muted); padding-block: 10px; }
.desktop-nav a:hover, .desktop-nav a[aria-current="page"] { color: var(--accent); }
.header-actions { display: flex; gap: 16px; align-items: center; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 11px 23px; border-radius: var(--radius); border: 1px solid var(--button); background: var(--button); color: var(--on-button); font-size: 15px; font-weight: 600; line-height: 1.5; white-space: nowrap; transition: transform .18s, opacity .18s; }
.button:hover { opacity: .88; }
.button:active { transform: translateY(1px); }
.button-secondary { border-color: var(--line); color: var(--text); background: transparent; }
.button-secondary:hover { border-color: var(--muted); opacity: 1; }
.header-actions .button { min-height: 40px; padding: 8px 18px; font-size: 14px; }
.menu-toggle { display: none; border: 1px solid var(--line); border-radius: var(--radius); color: var(--text); background: none; font-size: 14px; padding: 7px 12px; min-height: 40px; }
.mobile-nav { position: absolute; top: 100%; left: 0; right: 0; z-index: 10; background: var(--background); border-bottom: 1px solid var(--line); padding: 16px 24px 24px; }
.mobile-nav a { display: block; padding: 12px; font-size: 16px; }
.hero { display: grid; grid-template-columns: 1.13fr 1fr; gap: 56px; align-items: center; padding-top: 48px; padding-bottom: 52px; }
.hero-copy { padding-bottom: 8px; }
.eyebrow { color: var(--accent); font-size: 14px; font-family: Arial, sans-serif; letter-spacing: .12em; font-weight: 600; margin-bottom: 24px; }
.hero h1 { line-height: 1.38; letter-spacing: -.05em; font-size: clamp(2.65rem, 4.05vw, 3.75rem); }
.hero h1 span { color: var(--accent); }
.hero-description { margin-top: 28px; font-size: 17px; line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-visual { background: #1b1b1c; border-radius: var(--radius); overflow: hidden; }
.hero-visual img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.platform-band { display: flex; justify-content: space-between; align-items: center; gap: 32px; padding-top: 25px; padding-bottom: 25px; border-block: 1px solid var(--line); }
.platform-band p { font-size: 14px; }
.platform-band ul { display: flex; gap: clamp(32px, 6vw, 88px); list-style: none; }
.platform-band li { font-size: 22px; font-weight: 650; font-family: Arial, "Microsoft YaHei", sans-serif; letter-spacing: -.03em; }
.section { padding-block: 88px; }
.section-heading { max-width: 780px; margin-bottom: 42px; }
.section-heading p { margin-top: 18px; max-width: 660px; }
.service-grid { display: grid; grid-template-columns: 1fr 1.12fr; gap: 24px; }
.service-card { display: flex; flex-direction: column; justify-content: space-between; gap: 34px; padding: 36px 40px 40px; min-height: 352px; border-radius: var(--radius); }
.geo-card { background: var(--accent-surface); }
.fde-card { background: var(--surface); }
.service-letter { font-size: 64px; line-height: 1; font-family: Arial, sans-serif; font-weight: 700; letter-spacing: -.055em; color: var(--accent); }
.fde-card .service-letter { color: var(--muted); }
.service-card h3 { font-size: 24px; }
.service-card p { margin-top: 14px; max-width: 420px; }
.inline-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 24px; margin-top: 20px; font-size: 14px; color: var(--muted); }
.text-link { display: inline-block; color: var(--accent); font-size: 15px; font-weight: 600; border-bottom: 1px solid currentColor; padding-bottom: 3px; margin-top: 28px; }
.text-link:hover { opacity: .75; }
.evidence-section { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 80px; padding-top: 32px; }
.evidence-image img { border-radius: var(--radius); width: 100%; aspect-ratio: 1.03; object-fit: cover; }
.evidence-copy > p { margin-top: 20px; }
.evidence-list { display: grid; gap: 22px; margin-top: 30px; }
.evidence-list > div { padding-left: 18px; border-left: 2px solid var(--line); }
.evidence-list dt { font-weight: 650; margin-bottom: 4px; }
.evidence-list dd { font-size: 15px; color: var(--muted); }
.insight-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.insight-card { display: block; border-top: 1px solid var(--line); padding-top: 24px; }
.article-category { display: inline-block; font-size: 14px; color: var(--accent); }
.insight-card h3 { margin-top: 22px; font-size: 32px; line-height: 1.5; }
.insight-card p { margin-top: 18px; max-width: 470px; }
.insight-card:hover h3 { color: var(--accent); }
.insight-card .text-link { margin-top: 24px; }
.faq-section { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; padding-top: 40px; }
.faq-heading p { margin-top: 16px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { padding: 22px 0; cursor: pointer; display: flex; justify-content: space-between; gap: 24px; align-items: center; list-style: none; font-weight: 600; font-size: 17px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-weight: 400; font-size: 24px; color: var(--muted); flex-shrink: 0; transition: transform .18s; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-answer { color: var(--muted); padding: 0 30px 24px 0; font-size: 16px; }
.closing { border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 36px; padding-block: 70px; }
.closing h2 { font-size: clamp(24px, 2.5vw, 36px); }
.closing p { margin-top: 12px; }
.closing .button { flex-shrink: 0; }
.site-footer { background: var(--surface); padding-top: 44px; }
.footer-main { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 36px; }
.footer-main p { margin-top: 20px; font-size: 14px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); column-gap: 46px; row-gap: 14px; align-content: center; font-size: 14px; }
.footer-links a:hover, .footer-bottom a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 20px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.footer-bottom > div { display: flex; gap: 24px; }
.page-intro { padding-top: 48px; padding-bottom: 64px; }
.page-intro:not(.page-intro-split) { padding-bottom: 24px; }
.page-intro h1 { margin-top: 36px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb [aria-current] { color: var(--text); }
.intro-copy { margin-top: 24px; max-width: 670px; font-size: 18px; }
.intro-action { margin-top: 28px; }
.page-intro-split { display: grid; grid-template-columns: 1.18fr 1fr; gap: 64px; align-items: center; }
.intro-image { width: 100%; aspect-ratio: 1.16; object-fit: cover; border-radius: var(--radius); }
.section-surface { background: var(--surface); }
.question-examples { display: grid; grid-template-columns: 1fr; gap: 18px; }
.question-examples blockquote { font-size: clamp(20px, 2vw, 26px); line-height: 1.7; padding: 20px 28px; border-left: 3px solid var(--accent); background: var(--raised); }
.work-grid, .principle-grid { display: grid; grid-template-columns: 1fr 1fr; column-gap: 80px; row-gap: 44px; }
.work-label { color: var(--accent); font-size: 14px; display: inline-block; margin-bottom: 12px; }
.work-grid p, .principle-grid p { margin-top: 14px; max-width: 510px; }
.deliverables { display: grid; grid-template-columns: 1fr; gap: 0; }
.deliverables > div { display: grid; grid-template-columns: 1fr 2fr; gap: 48px; padding-block: 24px; border-top: 1px solid var(--line); }
.deliverables h3 { font-size: 20px; }
.scenario-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 64px; }
.scenario-main { background: var(--accent-surface); padding: 40px; border-radius: var(--radius); }
.scenario-main h3 { font-size: 27px; }
.scenario-main p { margin-top: 24px; }
.scenario-aside { display: grid; gap: 32px; align-content: center; }
.scenario-aside p { margin-top: 14px; }
.process-list { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; }
.process-list li { border-top: 2px solid var(--accent); padding-top: 24px; }
.process-list span { font-size: 21px; font-weight: 600; }
.process-list p { margin-top: 16px; font-size: 15px; }
.method-list { list-style: none; }
.method-list > li { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; padding-block: 40px; border-top: 1px solid var(--line); }
.method-title span { font-size: 14px; color: var(--accent); }
.method-title h2 { font-size: 26px; margin-top: 14px; }
.method-output { margin-top: 18px; font-size: 14px; }
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.comparison p { margin-top: 18px; }
.company-story { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.story-copy p + p { margin-top: 22px; }
.company-facts { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; }
.company-facts dl > div { display: grid; grid-template-columns: 110px 1fr; gap: 28px; padding-block: 16px; }
.company-facts dt { color: var(--muted); }
.company-facts dd { font-weight: 550; }
.insights-index { padding-top: 48px; }
.article { max-width: 820px; padding-block: 48px 80px; }
.article-header { margin-top: 42px; margin-bottom: 48px; }
.article-header h1 { margin-top: 14px; font-size: clamp(2rem, 3.7vw, 3rem); }
.article-intro { margin-top: 22px; font-size: 18px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; margin-top: 28px; }
.article-content { font-size: 17px; line-height: 2; }
.article-content h2 { font-size: 26px; margin: 40px 0 18px; }
.article-content p + p { margin-top: 20px; }
.article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.article-content dl { background: var(--surface); padding: 30px; border-radius: var(--radius); }
.article-content dt { font-weight: 600; margin-bottom: 6px; }
.article-content dd { color: var(--muted); margin-bottom: 20px; }
.article-content dd:last-child { margin-bottom: 0; }
.article-related { margin-top: 50px; border-top: 1px solid var(--line); padding-top: 24px; }
.article-related p { font-size: 14px; }
.article-related a { color: var(--accent); display: inline-block; margin-top: 12px; }
.contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; padding-top: 50px; }
.contact-aside h2 { font-size: 27px; }
.contact-aside p { margin-top: 20px; }
.contact-aside .privacy-hint { font-size: 14px; margin-top: 36px; }
.contact-aside > div { margin-bottom: 30px; }
.contact-aside > div h3 { font-size: 15px; color: var(--muted); margin-bottom: 8px; }
.contact-aside > div a { font-size: 20px; color: var(--accent); overflow-wrap: anywhere; }
.copy-contact { border: none; background: none; color: var(--accent); text-align: left; padding: 0; }
.copy-contact span { display: block; font-size: 14px; color: var(--muted); }
.copy-status { font-size: 14px; }
.brief-form { background: var(--surface); padding: 36px; border-radius: var(--radius); }
.field { display: grid; gap: 9px; margin-bottom: 24px; }
.field label { font-size: 15px; font-weight: 600; }
.field label span { font-size: 13px; color: var(--muted); margin-left: 8px; font-weight: 400; }
input, textarea, select { width: 100%; min-height: 48px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--raised); color: var(--text); padding: 11px 14px; font-size: 16px; }
textarea { resize: vertical; line-height: 1.7; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
.field-help { font-size: 13px; }
.form-status { margin-top: 18px; font-size: 14px; color: var(--accent); }
.brief-result { margin-top: 28px; padding-top: 26px; border-top: 1px solid var(--line); }
.brief-result h2 { font-size: 23px; }
.brief-result > p { font-size: 14px; margin-top: 12px; }
.brief-result pre { font: inherit; font-size: 14px; white-space: pre-wrap; overflow-wrap: anywhere; background: var(--raised); padding: 20px; border-radius: var(--radius); max-height: 500px; overflow: auto; }
.result-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.result-actions .button { min-height: 42px; padding: 10px 16px; font-size: 14px; }
.not-found { min-height: 60dvh; padding-block: 100px; }
.not-found p { margin-top: 20px; }
.not-found .button { margin-top: 32px; }
@media (min-width: 1600px) { .hero { padding-block: 64px; } }
@media (max-width: 1199px) {
  .container { width: calc(100% - 64px); }
  .desktop-nav { gap: 20px; }
  .header-inner { gap: 20px; }
  .hero { gap: 32px; }
  .hero h1 { font-size: 42px; }
  .evidence-section, .faq-section, .contact-layout { gap: 48px; }
  .page-intro-split { gap: 40px; }
  .page-intro-split h1 { font-size: 40px; }
}
@media (max-width: 1023px) {
  .desktop-nav { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .hero { padding-top: 36px; }
  .hero h1 { font-size: 36px; }
  .hero-description { font-size: 16px; margin-top: 22px; }
  .hero-actions { margin-top: 26px; gap: 10px; }
  .hero-actions .button { padding-inline: 16px; }
  .eyebrow { margin-bottom: 20px; }
  .hero { grid-template-columns: 1.15fr 1fr; gap: 24px; }
  .platform-band { gap: 24px; }
  .platform-band ul { gap: 32px; }
  .service-card { padding: 30px; }
  .evidence-section { gap: 40px; }
  .evidence-copy h2 { font-size: 30px; }
  .work-grid, .principle-grid { column-gap: 44px; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 36px; }
  .contact-layout { gap: 36px; }
  .brief-form { padding: 26px; }
  .footer-links { column-gap: 26px; }
}
@media (max-width: 767px) {
  .container { width: calc(100% - 40px); }
  .header-inner { height: 68px; gap: 12px; }
  .brand-mark { width: 34px; height: 34px; }
  .brand-mark > span { font-size: 39px; }
  .brand { gap: 9px; }
  .brand-name { font-size: 17px; }
  .brand-name > span { font-size: 8px; letter-spacing: .18em; }
  .header-actions { gap: 9px; }
  .header-actions .button { display: none; }
  .hero { grid-template-columns: 1fr; gap: 34px; padding-block: 36px; }
  .hero h1 { font-size: clamp(30px, 7.5vw, 46px); line-height: 1.5; }
  .eyebrow { font-size: 13px; margin-bottom: 16px; }
  .hero-copy { padding: 0; }
  .hero-description { margin-top: 20px; }
  .hero-actions { margin-top: 24px; }
  .hero-visual { max-height: 440px; }
  .hero-visual img { aspect-ratio: 1.25; }
  .platform-band { display: block; padding-block: 20px; }
  .platform-band ul { justify-content: space-between; gap: 16px; margin-top: 18px; }
  .platform-band li { font-size: 20px; }
  .section { padding-block: 56px; }
  .section-heading { margin-bottom: 28px; }
  h2 { font-size: 29px; }
  .service-grid { grid-template-columns: 1fr; gap: 20px; }
  .service-card { min-height: 310px; padding: 28px; gap: 26px; }
  .service-letter { font-size: 56px; }
  .service-card h3 { font-size: 23px; }
  .evidence-section { grid-template-columns: 1fr; gap: 32px; padding-top: 0; }
  .evidence-image img { aspect-ratio: 1.4; }
  .insight-grid { grid-template-columns: 1fr; gap: 36px; }
  .insight-card h3 { font-size: 28px; margin-top: 16px; }
  .faq-section { grid-template-columns: 1fr; gap: 24px; padding-top: 4px; }
  .faq-list summary { font-size: 16px; }
  .closing { align-items: flex-start; flex-direction: column; padding-block: 44px; gap: 24px; }
  .closing h2 { font-size: 25px; }
  .footer-main { flex-direction: column; gap: 28px; }
  .footer-links { grid-template-columns: repeat(3, 1fr); gap: 20px 12px; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .page-intro { padding-block: 30px 40px; }
  .page-intro h1 { margin-top: 28px; font-size: clamp(29px, 7.6vw, 42px); }
  .page-intro-split { grid-template-columns: 1fr; gap: 30px; }
  .intro-copy { font-size: 17px; margin-top: 20px; }
  .intro-image { aspect-ratio: 1.35; max-height: 440px; }
  .work-grid, .principle-grid { grid-template-columns: 1fr; gap: 32px; }
  .question-examples blockquote { padding: 18px 20px; font-size: 19px; }
  .deliverables > div { grid-template-columns: 1fr; gap: 12px; padding-block: 22px; }
  .scenario-layout { grid-template-columns: 1fr; gap: 30px; }
  .scenario-main { padding: 26px; }
  .scenario-main h3 { font-size: 23px; }
  .process-list { grid-template-columns: 1fr; gap: 24px; }
  .process-list li { padding-top: 18px; }
  .method-list > li { grid-template-columns: 1fr; gap: 20px; padding-block: 28px; }
  .method-title h2 { font-size: 24px; margin-top: 10px; }
  .comparison { grid-template-columns: 1fr; gap: 36px; }
  .company-story { grid-template-columns: 1fr; gap: 4px; }
  .company-facts { grid-template-columns: 1fr; gap: 24px; }
  .company-facts dl > div { grid-template-columns: 1fr; gap: 4px; padding-block: 12px; }
  .company-facts dt { font-size: 14px; }
  .article { padding-top: 30px; }
  .article-header { margin-top: 30px; margin-bottom: 34px; }
  .article-header h1 { font-size: 32px; }
  .article-content { font-size: 16px; }
  .article-content h2 { font-size: 23px; }
  .article-content dl { padding: 24px; }
  .contact-layout { grid-template-columns: 1fr; gap: 30px; padding-top: 30px; }
  .brief-form { padding: 24px 20px; }
  .contact-aside .privacy-hint { margin-top: 20px; }
  .not-found { padding-block: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .site-header, .site-footer, .hero-actions, .closing, .menu-toggle, .result-actions { display: none; }
  body { background: #fff; color: #222; }
  p { color: #444; }
  .container { width: 100%; }
  .section { padding-block: 24px; }
  a { text-decoration: underline; }
}