/* QuickTecc · Investor presentation */
:root {
  --paper: #f7f5f0;
  --paper-deep: #efede7;
  --ink: #152027;
  --muted: #59656b;
  --line: #d8d9d3;
  --red: #e52c27;
  --red-dark: #be1e1a;
  --white: #fff;
  --container: 1240px;
  --gutter: clamp(22px, 5vw, 80px);
  --header-height: 90px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Arial, Helvetica, sans-serif; font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button, input { border-radius: 0; }
a { color: inherit; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
figure, blockquote { margin: 0; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 600; }
p { margin-bottom: 1.2em; }
p:last-child { margin-bottom: 0; }
[hidden] { display: none !important; }
::selection { background: var(--red); color: var(--white); }
:focus-visible { outline: 3px solid var(--red); outline-offset: 5px; }
.container { width: min(var(--container), calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.section { padding-block: clamp(70px, 9vw, 132px); }
.section-label { display: flex; align-items: center; gap: 13px; margin-bottom: 26px; font-size: 11px; font-weight: 700; letter-spacing: .15em; line-height: 1.5; text-transform: uppercase; }
.section-label::before { content: ""; width: 24px; height: 3px; background: var(--red); flex: 0 0 24px; }
.section-heading { max-width: 920px; margin-bottom: 28px; font-size: clamp(34px, 4.25vw, 64px); font-weight: 500; letter-spacing: -.055em; line-height: 1.07; text-wrap: balance; }
.section-intro { max-width: 650px; color: var(--muted); font-size: clamp(16px, 1.45vw, 20px); line-height: 1.7; }
.button { min-height: 49px; display: inline-flex; justify-content: center; align-items: center; gap: 20px; padding: 13px 22px; border: 1px solid transparent; font-size: 13px; font-weight: 700; letter-spacing: .02em; line-height: 1.45; text-align: center; text-decoration: none; transition: background .2s, color .2s, border-color .2s, transform .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--red); color: var(--white); }
.button-primary:hover { background: var(--red-dark); }
.button-secondary { background: var(--paper); color: var(--ink); }
.button-secondary:hover { background: var(--white); }
.button-outline { border-color: currentColor; background: transparent; color: inherit; }
.button-outline:hover { background: var(--ink); color: var(--white); border-color: var(--ink); }
.text-link { display: inline-flex; gap: 14px; align-items: center; min-height: 44px; font-size: 13px; font-weight: 700; text-decoration: none; border-bottom: 1px solid currentColor; }
.text-link:hover { color: var(--red); }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 10px; left: 14px; z-index: 200; padding: 12px 20px; background: var(--white); color: var(--ink); transform: translateY(-160%); font-weight: 700; }
.skip-link:focus { transform: translateY(0); }
.print-only { display: none; }

/* A quiet, persistent navigation leaves the pitch center stage. */
.site-header { position: sticky; top: 0; z-index: 60; min-height: var(--header-height); background: rgba(247,245,240,.97); border-bottom: 1px solid rgba(21,32,39,.12); }
.header-inner { width: min(1440px, calc(100% - 64px)); min-height: var(--header-height); margin-inline: auto; display: flex; align-items: center; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-size: 21px; font-weight: 700; letter-spacing: -.055em; line-height: 1; }
.brand-logo { width: 36px; height: 36px; max-height: 36px; object-fit: contain; }
.brand > svg { width: 28px; height: 32px; color: var(--red); }
.brand span { color: var(--ink); }
.desktop-nav { display: flex; justify-content: center; align-items: center; gap: clamp(18px, 2vw, 30px); margin-left: auto; }
.desktop-nav a { position: relative; padding-block: 14px; font-size: 12px; line-height: 1.4; font-weight: 700; text-decoration: none; white-space: nowrap; }
.desktop-nav a::after { content: ""; position: absolute; inset: auto 0 7px; height: 2px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.desktop-nav a:hover::after, .desktop-nav a[aria-current="true"]::after { transform: scaleX(1); }
.language-switch { display: inline-flex; align-items: center; gap: 2px; padding-left: 22px; border-left: 1px solid var(--line); flex: 0 0 auto; }
.language-button { min-width: 43px; min-height: 44px; padding: 9px 8px; border: 0; background: transparent; color: #626b70; font-size: 12px; line-height: 1.4; font-weight: 700; transition: color .2s, background .2s; }
.language-button:hover { color: var(--ink); background: var(--paper-deep); }
.language-button[aria-pressed="true"] { color: var(--red); box-shadow: inset 0 -2px 0 var(--red); }
.menu-toggle { display: none; width: 44px; min-height: 44px; padding: 5px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-size: 12px; font-weight: 700; }
.menu-toggle svg { width: 22px; height: 22px; }
.menu-toggle span { display: block; width: 20px; height: 2px; margin: 5px auto; background: currentColor; }
.mobile-nav { display: none; }

/* Opening spread */
.hero { position: relative; min-height: min(850px, calc(100svh - var(--header-height))); min-height: max(700px, calc(100svh - var(--header-height))); overflow: hidden; background: #142027; color: var(--white); }
.hero-background, .hero-shade { position: absolute; inset: 0; pointer-events: none; }
.hero-background { width: 100%; height: 100%; max-width: none; object-fit: cover; object-position: center right; }
.hero-background img { width: 100%; height: 100%; object-fit: cover; object-position: center right; }
.hero-shade { background: linear-gradient(90deg, rgba(12,23,30,.97) 0%, rgba(12,23,30,.91) 31%, rgba(12,23,30,.45) 58%, rgba(12,23,30,.08) 100%); }
.hero-content { position: relative; z-index: 1; padding-top: clamp(84px, 10vw, 144px); padding-bottom: 150px; }
.hero-eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 25px; color: #e3e5e3; font-size: 10px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.hero-eyebrow::before { content: ""; width: 25px; height: 3px; background: var(--red); }
.hero-title { max-width: 770px; margin-bottom: 26px; font-size: clamp(44px, 5.8vw, 88px); font-weight: 500; letter-spacing: -.06em; line-height: .99; text-wrap: balance; }
.hero-title em, .hero-title strong { color: #ff544e; font-style: normal; font-weight: inherit; }
.hero-title > span { display: block; }
.hero-title > span:last-child { color: #ff544e; }
.hero-copy { max-width: 525px; margin-bottom: 30px; color: #c8cecf; font-size: 17px; line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.hero-stage { display: flex; align-items: center; gap: 8px; margin-top: 23px; color: #bcc8cb; font-size: 12px; line-height: 1.7; }
.hero-stage::before { content: ""; width: 5px; height: 5px; flex: 0 0 5px; border-radius: 50%; background: #7fbc98; }
.hero .button-outline { color: var(--white); border-color: #6a7378; }
.hero .button-outline:hover { background: var(--white); color: var(--ink); border-color: var(--white); }
.hero-bottom { position: absolute; z-index: 2; bottom: 0; left: 0; right: 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 24px; border-top: 1px solid rgba(255,255,255,.2); color: #c9d1d1; font-size: 11px; letter-spacing: .04em; }
.hero-bottom .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.hero-bottom p { margin: 0; }
.hero-index { display: inline-flex; align-items: center; gap: 16px; color: var(--white); font-size: 11px; letter-spacing: .08em; text-decoration: none; white-space: nowrap; }
.hero-index > span:last-child { color: #ff544e; font-size: 20px; }

/* The thesis in three compact signals. */
.intro-strip { padding-block: 43px; background: var(--paper-deep); border-bottom: 1px solid var(--line); }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 45px; }
.intro-item { display: grid; grid-template-columns: 22px 1fr; align-items: start; gap: 4px 16px; min-width: 0; }
.intro-item + .intro-item { border-left: 1px solid #cccfca; padding-left: 40px; }
.intro-number { flex: 0 0 auto; color: var(--red); font-size: 13px; line-height: 1.8; font-weight: 700; }
.intro-item h2, .intro-item h3 { margin: 0 0 5px; font-size: 17px; letter-spacing: -.025em; line-height: 1.35; }
.intro-item p { grid-column: 2; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

/* Product: process on the left, evidence on the right. */
.split-layout { display: grid; grid-template-columns: .86fr 1.14fr; align-items: start; gap: clamp(45px, 8vw, 115px); }
.flow-copy .section-heading { font-size: clamp(34px, 3.8vw, 56px); }
.steps-list { margin: 32px 0 0; padding: 0; list-style: none; }
.step { display: flex; gap: 18px; padding: 20px 0; border-top: 1px solid var(--line); }
.step:last-child { border-bottom: 1px solid var(--line); }
.step-number { padding-top: 1px; color: var(--red); font-size: 11px; font-weight: 700; line-height: 1.7; }
.step h3 { margin-bottom: 5px; font-size: 15px; letter-spacing: -.02em; }
.step p { color: var(--muted); font-size: 15px; line-height: 1.7; }
.product-figure { margin-top: 8px; padding: clamp(15px, 2vw, 30px); background: #e7e9e5; }
.product-figure > img { width: 100%; border: 1px solid #cad0cb; box-shadow: 0 18px 40px rgba(21,32,39,.1); }
.product-figure picture img { width: 100%; border: 1px solid #cad0cb; }
.product-caption { margin-top: 18px; color: #617076; font-size: 12px; line-height: 1.7; }
.product-caption strong { color: var(--ink); font-weight: 700; }
.product-window { overflow: hidden; background: #fff; border: 1px solid #cdd4d0; box-shadow: 0 20px 40px #15202712; }
.product-window-bar { display: flex; align-items: center; gap: 5px; height: 30px; padding-inline: 12px; background: #f6f7f5; border-bottom: 1px solid #dfe3df; }
.product-window-bar i { width: 5px; height: 5px; background: #c7ceca; border-radius: 50%; }
.product-window-bar span { margin-left: auto; color: #7b8786; font-size: 8px; }
.product-window-body { padding: 24px; }
.product-window h3 { margin-bottom: 14px; font-size: 20px; letter-spacing: -.04em; }
.product-window .status { display: inline-block; padding: 4px 7px; background: #e8f1e9; color: #31704a; font-size: 9px; }
.product-window .mock-field { padding-block: 12px; border-bottom: 1px solid #e2e6e2; font-size: 11px; }
.product-window .mock-field strong { display: block; color: #7b8786; font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }

/* Market numbers are published context, never claimed traction. */
.market-section { background: var(--ink); color: var(--white); }
.market-section .section-intro { color: #b5c0c3; }
.section-topline { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; margin-bottom: 6px; }
.section-topline .section-label { margin-bottom: 0; }
.market-section .section-topline { align-items: start; flex-wrap: nowrap; gap: 60px; }
.market-section .section-topline > div { flex: 1.35; min-width: 0; }
.market-section .section-topline .section-label { margin-bottom: 26px; }
.market-section .section-topline > .section-intro { flex: 1; max-width: 365px; padding-top: 45px; font-size: 15px; }
.market-section .text-link { color: #c1cdd0; font-size: 12px; min-height: 38px; border-color: #65787e; }
.tab-list { display: flex; border-bottom: 1px solid #4e5b61; margin-block: 36px 0; gap: 28px; }
.tab-button { position: relative; min-height: 50px; padding: 12px 0 15px; border: 0; background: none; color: #aab6b9; font-size: 13px; font-weight: 700; line-height: 1.5; }
.tab-button::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.tab-button[aria-selected="true"] { color: var(--white); }
.tab-button[aria-selected="true"]::after { transform: scaleX(1); }
.tab-button:hover { color: var(--white); }
.market-panel { padding-top: 43px; }
.market-panel > h3 { margin-bottom: 12px; font-size: 18px; font-weight: 400; }
.market-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 45px; }
.market-stat { padding-top: 7px; }
.market-stat + .market-stat { padding-left: 40px; border-left: 1px solid #46535a; }
.stat-value { display: block; margin-bottom: 16px; color: var(--white); font-size: clamp(39px, 4.6vw, 70px); font-weight: 400; letter-spacing: -.06em; line-height: 1.05; }
.stat-label { max-width: 260px; color: #c5cdcf; font-size: 13px; line-height: 1.65; }
.market-stat small { display: block; margin-top: 12px; color: #819196; font-size: 10px; }
.source-note { margin-top: 30px; color: #90a0a6; font-size: 12px; line-height: 1.8; }
.source-links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 10px; }
.source-links a { display: inline-flex; min-height: 35px; align-items: center; font-size: 10px; color: #b7c4c7; text-underline-offset: 4px; }
.source-links a:hover { color: var(--white); }
.buyer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 6vw, 90px); margin-top: 68px; padding-top: 36px; border-top: 1px solid #46535a; }
.buyer-type { margin-bottom: 16px; color: #ff6660; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .15em; }
.buyer-column h3 { margin-bottom: 15px; font-size: 26px; font-weight: 500; letter-spacing: -.035em; line-height: 1.15; }
.buyer-column > p:last-child { max-width: 480px; color: #bdc8cb; font-size: 15px; line-height: 1.8; }
.buyer-list { padding: 0; margin: 0; list-style: none; color: #bdc8cb; font-size: 13px; line-height: 1.8; }
.buyer-list li { position: relative; padding-left: 16px; }
.buyer-list li::before { content: ""; position: absolute; left: 0; top: .8em; width: 4px; height: 4px; background: #708189; }

/* A concrete building-service example. */
.case-section { border-bottom: 1px solid var(--line); }
.case-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 90px); align-items: stretch; }
.case-image { position: relative; min-height: 600px; overflow: hidden; background: #d7dcd6; }
.case-image > img { width: 100%; height: 100%; object-fit: cover; object-position: 75% center; }
.case-image figcaption { position: absolute; left: 24px; bottom: 24px; right: 24px; color: var(--white); font-size: 10px; line-height: 1.6; text-shadow: 0 1px 10px #000; }
.case-content { align-self: center; padding: 80px var(--gutter) 80px 0; }
.case-content .section-heading { font-size: clamp(34px, 3.8vw, 54px); }
.case-content .section-intro { font-size: 15px; }
.case-step-buttons { display: flex; gap: 8px; margin-top: 30px; }
.case-step-button { display: flex; flex: 1; flex-direction: column; align-items: center; justify-content: center; gap: 3px; min-width: 0; min-height: 54px; padding: 8px 6px; border: 1px solid #b8c0bc; background: transparent; color: var(--muted); font-size: 12px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; }
.case-step-button > span:first-child { font-size: 8px; font-weight: 400; opacity: .7; }
.case-step-button[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: var(--white); }
.case-step-button:hover { border-color: var(--ink); }
.case-detail { min-height: 176px; padding-block: 24px 15px; }
.case-detail-index { display: block; margin-bottom: 10px; color: var(--red); font-size: 10px; letter-spacing: .1em; font-weight: 700; }
.case-detail-title { margin-bottom: 10px; font-size: 21px; letter-spacing: -.025em; line-height: 1.25; }
.case-detail-copy { max-width: 430px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.case-footnote { border-top: 1px solid var(--line); padding-top: 20px; color: #7b868b; font-size: 12px; line-height: 1.65; }

/* The breadth of the market is a list, not a wall of cards. */
.industry-section .section-topline { align-items: start; gap: 50px; margin-bottom: 46px; }
.industry-section .section-topline .section-heading { max-width: 680px; margin-bottom: 0; }
.industry-section .section-topline .section-intro { max-width: 335px; padding-top: 8px; font-size: 14px; }
.industry-list { border-top: 1px solid var(--line); }
.industry-row { display: grid; grid-template-columns: 50px 1fr 1fr; align-items: center; gap: 28px; min-height: 104px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.industry-number { color: var(--red); font-size: 11px; font-weight: 700; }
.industry-title { margin: 0; font-size: clamp(21px, 2.2vw, 32px); font-weight: 500; letter-spacing: -.04em; line-height: 1.2; }
.industry-detail { max-width: 460px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; }

/* Languages have a visible role in the business story. */
.language-section { background: #e9ece6; }
.language-layout { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: clamp(40px, 8vw, 115px); }
.language-story .section-heading { font-size: clamp(34px, 4vw, 58px); }
.language-story .section-intro { max-width: 550px; font-size: 16px; }
.language-route { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 13px; padding-block: 10px; }
.language-node { min-width: 0; padding: 25px 19px; border-top: 3px solid var(--ink); background: var(--paper); }
.language-node-label { display: block; color: var(--muted); font-size: 9px; letter-spacing: .08em; line-height: 1.6; text-transform: uppercase; }
.language-node-value { display: block; margin-top: 15px; font-size: 32px; font-weight: 500; letter-spacing: -.05em; line-height: 1.15; }
.language-node p { margin-top: 14px; color: var(--muted); font-size: 11px; line-height: 1.65; }
.language-native { display: block; margin-top: 30px; color: var(--red); font-size: 32px; font-weight: 400; letter-spacing: -.04em; line-height: 1.2; }
.language-connector { color: var(--red); font-size: 25px; font-weight: 400; }
.available-languages { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 22px; }
.language-tag { padding: 6px 9px; border: 1px solid #c8cfca; color: #50615e; font-size: 10px; }
.available-languages > p { flex-basis: 100%; margin-bottom: 3px; font-size: 10px; color: #6d7975; }
.available-label { margin: 24px 0 0; color: #6d7975; font-size: 10px; }
.available-label + .available-languages { margin-top: 9px; }
.language-section .source-note { color: #687770; }

/* The operating logic of a horizontal product. */
.economics-section { border-bottom: 1px solid var(--line); }
.economics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 35px; margin-top: 52px; }
.economics-item { padding-top: 25px; border-top: 3px solid var(--ink); }
.economics-item > span, .economics-item > .economics-number { display: block; margin-bottom: 25px; color: var(--red); font-size: 11px; font-weight: 700; }
.economics-item h3 { margin-bottom: 18px; font-size: 24px; font-weight: 500; line-height: 1.15; letter-spacing: -.035em; }
.economics-item p { color: var(--muted); font-size: 15px; line-height: 1.8; }

/* A transparent, editable revenue illustration. */
.model-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 110px); align-items: start; }
.model-copy .section-heading { font-size: clamp(34px, 4vw, 58px); }
.model-copy .section-intro { font-size: 16px; }
.model-copy ul { margin: 28px 0 0; padding-left: 18px; color: var(--muted); font-size: 13px; line-height: 2; }
.calculator { padding: 32px; background: var(--ink); color: var(--white); }
.calculator > h3 { margin-bottom: 24px; color: #b9c5c8; font-size: 10px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.calculator-controls { display: block; }
.calculator-label { display: block; margin-bottom: 10px; color: #b3bfc3; font-size: 12px; font-weight: 700; line-height: 1.6; }
.calculator-market, .calculator-input { width: 100%; min-height: 47px; padding: 10px 12px; border: 1px solid #516067; background: #253139; color: var(--white); font-size: 15px; }
.calculator-market { color-scheme: dark; }
.calculator-count-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 25px; }
.calculator-count-row .calculator-label { max-width: 55%; margin-bottom: 0; }
.calculator-count-row .calculator-input { width: 115px; max-width: 43%; flex: 0 0 auto; text-align: right; }
.calculator-input:focus, .calculator-market:focus { border-color: #fb665f; outline: 2px solid #fb665f; outline-offset: 1px; }
.calculator-range { width: 100%; margin: 25px 0 8px; accent-color: var(--red); cursor: pointer; min-height: 26px; }
.calculator-result { margin-top: 20px; padding-top: 24px; border-top: 1px solid #46565e; }
.calculator-result > span:first-child, .calculator-result > p:first-child { display: block; color: #b3bfc3; font-size: 12px; }
.result-value { display: block; margin-top: 12px; color: var(--white); font-size: clamp(36px, 4.25vw, 61px); font-weight: 400; line-height: 1.1; letter-spacing: -.055em; overflow-wrap: anywhere; }
.result-period { margin-top: 6px; color: #b8c4c8; font-size: 12px; }
.calculator-note { margin-top: 22px; color: #9baeb4; font-size: 12px; line-height: 1.75; }
.calculator-note strong { color: #cad3d6; font-weight: 400; }

/* Founder: a real incident, shown without decoration. */
.founder-section { background: var(--paper-deep); border-top: 1px solid var(--line); }
.founder-layout { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(45px, 8vw, 115px); align-items: start; }
.founder-quote { margin-bottom: 28px; font-size: clamp(27px, 3.35vw, 47px); font-weight: 400; letter-spacing: -.045em; line-height: 1.2; text-wrap: balance; }
.founder-quote::before { content: none; }
.founder-layout > div > p, .founder-layout > div > cite { max-width: 640px; color: var(--muted); font-size: 16px; line-height: 1.8; }
.founder-layout cite { display: block; margin-top: 25px; font-size: 11px; font-style: normal; font-weight: 700; }
.founder-facts { padding-top: 2px; }
.founder-fact { display: flex; justify-content: space-between; align-items: start; gap: 20px; padding-block: 25px; border-top: 1px solid #cbd0ca; }
.founder-fact:last-child { border-bottom: 1px solid #cbd0ca; }
.founder-fact strong { font-size: 36px; letter-spacing: -.05em; line-height: 1.05; font-weight: 400; }
.founder-fact span, .founder-fact p { max-width: 170px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

/* Closing: invitation with room to breathe. */
.investment-section { position: relative; overflow: hidden; background: var(--red); color: var(--white); }
.investment-layout { display: grid; grid-template-columns: 1.5fr .8fr; align-items: end; gap: clamp(35px, 7vw, 100px); }
.investment-section .section-label::before { background: var(--white); }
.investment-title { max-width: 800px; margin-bottom: 0; font-size: clamp(39px, 5.4vw, 82px); font-weight: 500; letter-spacing: -.06em; line-height: 1.04; text-wrap: balance; }
.investment-copy { max-width: 380px; margin-bottom: 25px; color: #ffe1dd; font-size: 16px; line-height: 1.7; }
.investment-actions { display: flex; flex-direction: column; align-items: start; gap: 15px; }
.investment-actions .button-secondary { background: var(--white); }
.investment-actions .button-primary { background: var(--white); color: var(--ink); }
.investment-actions .button-primary:hover { background: var(--ink); color: var(--white); }
.investment-actions .button-outline { color: var(--white); border-color: #ffaaa3; }
.investment-actions .button-outline:hover { border-color: var(--ink); }
.investment-actions .button-secondary:hover { background: var(--ink); color: var(--white); }
.investment-actions .text-link { color: var(--white); border-color: #ffb0aa; font-weight: 400; font-size: 11px; }
.investment-actions .text-link:hover { border-color: var(--white); }
.contact-email { display: block; width: fit-content; margin-top: 20px; color: #fff; font-size: 12px; text-decoration: none; text-underline-offset: 4px; }
.contact-email:hover { text-decoration: underline; }
.print-button { margin-top: 17px; padding: 0; border: 0; border-bottom: 1px solid #ffaaa3; border-radius: 0; color: #ffe1dd; background: transparent; font-size: 12px; font-weight: 400; }
.print-button:hover { color: #fff; border-color: #fff; }
.site-footer { padding-block: 34px; background: var(--paper); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.site-footer .brand-logo { width: 32px; height: 32px; }
.site-footer p { margin: 0; color: #7a8589; font-size: 12px; line-height: 1.8; }
.footer-links { display: flex; align-items: center; gap: 24px; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; color: #59666a; font-size: 10px; text-decoration: none; }
.footer-links a:hover { color: var(--red); }
.back-to-top { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 44px; color: var(--ink); text-decoration: none; font-size: 12px; }
.back-to-top > span:last-child { color: var(--red); font-size: 19px; }
.back-to-top:hover { color: var(--red); }
.site-footer .source-links { display: block; margin-top: 25px; padding-top: 17px; border-top: 1px solid var(--line); }
.site-footer .source-links summary { width: fit-content; padding-block: 10px; cursor: pointer; color: #59666a; font-size: 12px; }
.site-footer .source-links a { color: #59666a; font-size: 12px; }
.site-footer .source-links a:hover { color: var(--red); }
.footer-sources { max-width: 850px; padding-top: 10px; }
.footer-sources p { margin-bottom: 8px; }
.site-footer .footer-copyright { margin-top: 15px; color: #7a8589; font-size: 9px; }

/* Language-safe, opt-in motion. Content remains visible without JavaScript. */
html[lang="zh-CN"] body { font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif; }
html[lang="zh-CN"] :is(.hero-title, .section-heading, .investment-title) { letter-spacing: -.035em; line-height: 1.18; }
html[lang="zh-CN"] .hero-title { max-width: 700px; }
html[lang="zh-CN"] :is(.section-intro, .hero-copy, .case-detail-copy, .investment-copy) { line-height: 1.85; }
html[lang="zh-CN"] .founder-quote { line-height: 1.4; }
@media (prefers-reduced-motion: no-preference) {
  .js-motion .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js-motion .reveal.is-visible { opacity: 1; transform: none; }
}

@media (min-width: 1600px) {
  .hero-content { padding-top: 154px; }
  .hero-background { background-position: center 60%; }
}

@media (max-width: 1140px) {
  :root { --header-height: 82px; }
  .header-inner { width: calc(100% - 48px); gap: 18px; }
  .desktop-nav { gap: 16px; }
  .desktop-nav a { font-size: 12px; }
  .language-switch { padding-left: 12px; }
  .brand-logo { width: 36px; }
  .language-button { min-width: 43px; padding-inline: 5px; }
  .hero-title { max-width: 690px; }
  .intro-grid { gap: 25px; }
  .intro-item + .intro-item { padding-left: 25px; }
  .case-image { min-height: 560px; }
  .industry-section .section-topline { gap: 25px; }
  .industry-section .section-topline .section-heading { max-width: 600px; }
  .language-node { padding: 23px 15px; }
  .economics-grid { gap: 30px; }
}

@media (max-width: 950px) {
  :root { --header-height: 118px; --gutter: 32px; }
  .site-header { min-height: 118px; }
  .header-inner { display: grid; grid-template-columns: 1fr 44px; gap: 0 15px; min-height: 118px; padding-top: 9px; }
  .brand { grid-column: 1; grid-row: 1; width: fit-content; }
  .brand-logo { width: 34px; height: 34px; max-height: 34px; }
  .menu-toggle { display: block; grid-column: 2; grid-row: 1; }
  .desktop-nav { display: none; }
  .language-switch { grid-column: 1 / -1; grid-row: 2; justify-content: center; padding: 0; margin-top: 5px; border-left: 0; border-top: 1px solid var(--line); }
  .language-button { min-width: 60px; min-height: 43px; font-size: 12px; }
  .mobile-nav { display: grid; position: fixed; top: 118px; left: 0; right: 0; max-height: calc(100svh - 118px); overflow-y: auto; padding: 10px 24px 25px; background: var(--paper); box-shadow: 0 20px 40px #15202726; }
  .mobile-nav a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 17px; text-decoration: none; }
  .mobile-nav a:hover { color: var(--red); }
  .hero { min-height: 720px; }
  .hero-content { padding-top: 90px; padding-bottom: 140px; }
  .hero-title { max-width: 610px; font-size: clamp(48px, 7.7vw, 73px); }
  .hero-shade { background: linear-gradient(90deg, #0c171ef5 0%, #0c171ed9 42%, #0c171e4d 100%); }
  .hero-copy { max-width: 475px; font-size: 16px; }
  .intro-grid { gap: 20px; }
  .intro-item { gap: 12px; }
  .intro-item + .intro-item { padding-left: 20px; }
  .intro-item h3 { font-size: 15px; }
  .intro-item p { font-size: 14px; }
  .split-layout { grid-template-columns: 1fr 1.05fr; gap: 35px; }
  .flow-copy .section-heading { font-size: 37px; }
  .product-figure { margin-top: 30px; padding: 15px; }
  .market-grid { gap: 25px; }
  .market-section .section-topline { gap: 35px; }
  .market-section .section-topline > .section-intro { font-size: 13px; }
  .market-stat + .market-stat { padding-left: 25px; }
  .stat-value { font-size: 46px; }
  .stat-label { font-size: 12px; }
  .case-layout { gap: 35px; }
  .case-content .section-heading { font-size: 37px; }
  .case-image { min-height: 570px; }
  .industry-section .section-topline { display: block; }
  .industry-section .section-topline .section-intro { max-width: 550px; padding-top: 20px; }
  .industry-row { grid-template-columns: 30px .9fr 1fr; gap: 20px; }
  .industry-title { font-size: 23px; }
  .language-layout { gap: 35px; }
  .language-route { gap: 8px; }
  .language-node-value { font-size: 25px; }
  .language-node-label { font-size: 8px; }
  .language-connector { font-size: 20px; }
  .economics-grid { grid-template-columns: 1fr 1fr; }
  .calculator { padding: 25px; }
  .calculator-controls { gap: 15px; }
  .model-layout { gap: 35px; }
  .result-value { font-size: 43px; }
  .founder-layout { gap: 45px; }
  .founder-fact { flex-direction: column; gap: 12px; padding-block: 20px; }
  .founder-fact span, .founder-fact p { max-width: none; }
  .investment-layout { gap: 35px; grid-template-columns: 1.2fr .8fr; }
  .investment-title { font-size: 52px; }
  .investment-copy { font-size: 14px; }
  .footer-inner { flex-wrap: wrap; }
}

@media (max-width: 680px) {
  :root { --gutter: 24px; }
  .section { padding-block: 73px; }
  .section-label { font-size: 10px; margin-bottom: 23px; gap: 11px; letter-spacing: .12em; }
  .section-heading { font-size: 37px; margin-bottom: 22px; }
  .section-intro { font-size: 15px; line-height: 1.75; }
  .header-inner { width: calc(100% - 40px); }
  .hero { min-height: 720px; }
  .hero-background { background-position: 62% center; }
  .hero-shade { background: linear-gradient(90deg, #0c171eeb 0%, #0c171ec9 58%, #0c171e66 100%), linear-gradient(0deg, #0c171ec9 0%, transparent 50%); }
  .hero-content { padding-top: 77px; padding-bottom: 145px; }
  .hero-eyebrow { font-size: 9px; line-height: 1.7; letter-spacing: .1em; max-width: 300px; }
  .hero-title { max-width: 500px; font-size: clamp(44px, 10.6vw, 63px); line-height: 1.02; letter-spacing: -.058em; margin-bottom: 25px; }
  .hero-copy { max-width: 430px; font-size: 15px; line-height: 1.7; margin-bottom: 28px; }
  .hero-actions { align-items: stretch; gap: 10px; }
  .button { min-height: 48px; padding: 12px 17px; font-size: 12px; }
  .hero-bottom { padding-block: 18px; }
  .hero-bottom { align-items: center; gap: 18px; font-size: 9px; letter-spacing: .01em; }
  .hero-bottom .container { align-items: start; gap: 18px; }
  .hero-bottom p { max-width: 260px; font-size: 10px; line-height: 1.7; }
  .hero-index { font-size: 9px; letter-spacing: 0; }
  .hero-index { gap: 7px; }
  .hero-index > span:last-child { font-size: 17px; }
  .intro-strip { padding-block: 32px; }
  .intro-grid { display: block; }
  .intro-item, .intro-item + .intro-item { padding: 18px 0; gap: 4px 17px; border-left: 0; }
  .intro-item:first-child { padding-top: 0; }
  .intro-item:last-child { padding-bottom: 0; }
  .intro-item + .intro-item { margin-top: 0; border-top: 1px solid #d1d5cd; }
  .intro-item h2, .intro-item h3 { font-size: 17px; }
  .intro-item p { max-width: 430px; font-size: 14px; }
  .intro-number { min-width: 22px; }
  .split-layout, .case-layout, .language-layout, .model-layout, .founder-layout, .investment-layout { grid-template-columns: 1fr; gap: 38px; }
  .flow-copy .section-heading { max-width: 500px; font-size: 37px; }
  .steps-list { margin-top: 25px; }
  .step { padding-block: 18px; }
  .step h3 { font-size: 15px; }
  .step p { font-size: 15px; }
  .product-figure { margin-top: 0; padding: 18px; }
  .product-caption { font-size: 12px; }
  .section-topline { gap: 16px; }
  .market-section .section-heading { max-width: 500px; }
  .market-section .section-topline { display: block; }
  .market-section .section-topline > .section-intro { max-width: none; padding-top: 0; font-size: 14px; }
  .market-grid { grid-template-columns: 1fr; gap: 0; }
  .market-panel { padding-top: 25px; }
  .market-stat, .market-stat + .market-stat { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 25px; padding: 24px 0; border-left: 0; }
  .market-stat + .market-stat { border-top: 1px solid #46535a; }
  .stat-value { margin-bottom: 0; font-size: 46px; }
  .stat-label { align-self: center; font-size: 12px; }
  .market-stat small { margin-top: 0; grid-column: 1 / -1; }
  .tab-list { margin-top: 27px; gap: 25px; }
  .tab-button { font-size: 12px; }
  .source-note { margin-top: 15px; }
  .buyer-grid { grid-template-columns: 1fr; gap: 32px; margin-top: 42px; padding-top: 30px; }
  .buyer-column h3 { font-size: 25px; }
  .buyer-list { font-size: 13px; }
  .case-image { min-height: 0; height: 400px; order: 2; }
  .case-content { order: 1; padding: 72px var(--gutter) 0; }
  .case-content .section-heading { max-width: 470px; font-size: 37px; }
  .case-detail { min-height: 158px; }
  .case-detail-copy { max-width: none; font-size: 15px; }
  .case-step-buttons { margin-top: 25px; }
  .case-footnote { font-size: 12px; }
  .industry-section .section-topline { margin-bottom: 30px; }
  .industry-section .section-topline .section-intro { padding-top: 18px; font-size: 14px; }
  .industry-row { grid-template-columns: 25px 1fr; align-items: start; gap: 9px 17px; padding-block: 25px; }
  .industry-number { padding-top: 5px; }
  .industry-title { font-size: 25px; }
  .industry-detail { grid-column: 2; max-width: 480px; font-size: 15px; }
  .language-story .section-heading { font-size: 37px; max-width: 500px; }
  .language-story .section-intro { font-size: 15px; }
  .language-route { gap: 12px; }
  .language-node { padding: 25px 20px; }
  .language-node-label { font-size: 9px; }
  .language-node-value { font-size: 35px; }
  .language-node p { font-size: 11px; }
  .language-connector { font-size: 26px; }
  .available-languages { margin-top: 18px; }
  .economics-grid { grid-template-columns: 1fr; gap: 30px; margin-top: 35px; }
  .economics-item { display: grid; grid-template-columns: 28px 1fr; gap: 0 16px; padding-top: 22px; border-top-width: 1px; }
  .economics-item > span, .economics-item > .economics-number { padding-top: 4px; margin-bottom: 0; }
  .economics-item h3 { margin-bottom: 13px; font-size: 25px; }
  .economics-item p { grid-column: 2; font-size: 15px; }
  .model-copy .section-heading { font-size: 37px; max-width: 500px; }
  .model-copy .section-intro { font-size: 15px; }
  .model-copy ul { margin-top: 22px; line-height: 1.8; }
  .calculator { padding: 27px 24px; }
  .calculator-controls { gap: 18px; }
  .calculator-result { margin-top: 20px; }
  .result-value { font-size: 51px; }
  .founder-quote { font-size: 34px; max-width: 500px; }
  .founder-layout > div > p { font-size: 15px; }
  .founder-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
  .founder-fact { gap: 14px; }
  .founder-fact:last-child { border-bottom: 0; }
  .founder-fact strong { font-size: 37px; }
  .founder-fact span, .founder-fact p { font-size: 12px; }
  .investment-layout { gap: 29px; }
  .investment-title { max-width: 510px; font-size: 47px; }
  .investment-copy { max-width: 460px; margin-bottom: 22px; font-size: 15px; }
  .investment-actions { gap: 12px; }
  .site-footer { padding-block: 27px; }
  .footer-inner { display: grid; grid-template-columns: 1fr; gap: 18px; }
  .site-footer .brand-logo { width: 32px; }
  .footer-links { flex-wrap: wrap; gap: 10px 24px; }
  .footer-links a { min-height: 35px; }
  .back-to-top { justify-content: start; }
  html[lang="zh-CN"] .hero-title { font-size: clamp(40px, 10vw, 58px); }
  html[lang="zh-CN"] .hero-copy { font-size: 14px; }
}

@media (max-width: 370px) {
  :root { --gutter: 20px; }
  .hero { min-height: 750px; }
  .hero-content { padding-top: 60px; }
  .hero-title { font-size: 43px; }
  .hero-copy { font-size: 14px; }
  .hero-actions { flex-direction: column; align-items: start; }
  .hero-bottom, .hero-bottom .container { display: block; }
  .hero-bottom p { max-width: none; }
  .hero-index { display: none; }
  .section-heading, .flow-copy .section-heading, .case-content .section-heading, .model-copy .section-heading, .language-story .section-heading { font-size: 33px; }
  .market-stat, .market-stat + .market-stat { gap: 10px 15px; }
  .stat-value { font-size: 39px; }
  .stat-label { font-size: 11px; }
  .language-route { gap: 7px; }
  .language-node { padding: 20px 12px; }
  .language-node-value { font-size: 29px; }
  .language-node-label { font-size: 8px; }
  .calculator { padding: 24px 20px; }
  .calculator-controls { grid-template-columns: 1fr; gap: 17px; }
  .result-value { font-size: 44px; }
  .investment-title { font-size: 41px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .button:hover { transform: none; }
}

@media (forced-colors: active) {
  .button, .language-button, .tab-button, .case-step-button, .calculator-input, .calculator-market { border: 1px solid ButtonText; }
  .language-button[aria-pressed="true"], .tab-button[aria-selected="true"], .case-step-button[aria-selected="true"] { outline: 2px solid Highlight; }
  .hero-background, .hero-shade { display: none; }
}

@media print {
  :root { --gutter: 0px; }
  @page { size: A4; margin: 16mm 14mm; }
  html, body { background: #fff !important; color: #152027 !important; font-size: 10pt; line-height: 1.5; }
  .site-header, .desktop-nav, .mobile-nav, .language-switch, .menu-toggle, .hero-background, .hero-shade, .hero-actions, .hero-bottom, .tab-list, .case-step-buttons, .calculator-controls, .calculator-range, .investment-actions, .back-to-top, .skip-link, .footer-links, .print-button { display: none !important; }
  .container { width: 100%; max-width: none; }
  .section { padding: 26pt 0; border-bottom: 1px solid #ccc; background: #fff !important; color: #152027 !important; break-inside: auto; }
  .section-label, .hero-eyebrow { color: #59656b !important; font-size: 7pt; margin-bottom: 12pt; }
  .section-label::before, .hero-eyebrow::before { background: #e52c27 !important; }
  .section-heading, .flow-copy .section-heading, .case-content .section-heading, .language-story .section-heading, .model-copy .section-heading, .investment-title { max-width: none; font-size: 27pt; line-height: 1.13; margin-bottom: 12pt; color: #152027 !important; }
  .section-intro, .hero-copy, .investment-copy { color: #59656b !important; font-size: 10pt; }
  .hero { min-height: 0; overflow: visible; background: #fff !important; color: #152027 !important; }
  .hero-content { padding: 16pt 0 30pt; }
  .hero-title { max-width: none; color: #152027 !important; font-size: 37pt; line-height: 1.05; }
  .hero-copy { max-width: 90%; }
  .hero-stage { color: #59656b !important; }
  .hero-title > span:last-child { color: #e52c27 !important; }
  .hero-title strong, .hero-title em { color: #e52c27 !important; }
  .intro-strip { padding: 18pt 0; background: #fff !important; }
  .intro-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18pt; }
  .intro-item, .intro-item + .intro-item { padding: 0; border: 0; }
  .intro-item h3 { font-size: 10pt; }
  .intro-item p { font-size: 8pt; }
  .split-layout, .language-layout, .model-layout, .founder-layout { display: block; }
  .product-figure { max-width: 80%; margin: 22pt auto 0; padding: 12pt; break-inside: avoid; }
  .product-caption { font-size: 7pt; }
  .steps-list { margin-top: 12pt; }
  .step { padding: 10pt 0; break-inside: avoid; }
  .step h3 { font-size: 10pt; }
  .step p { font-size: 9pt; }
  .market-panel, .market-panel[hidden] { display: block !important; margin-top: 14pt; padding-top: 12pt; break-inside: avoid; }
  .market-panel + .market-panel { border-top: 1px solid #ccc; }
  .market-panel > h3 { color: #152027 !important; font-size: 13pt; }
  .market-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20pt; }
  .market-stat, .market-stat + .market-stat { display: block; padding: 0; border: 0; }
  .stat-value { color: #152027 !important; font-size: 27pt; margin-bottom: 8pt; }
  .stat-label, .source-note, .source-links a, .buyer-list, .market-stat small { color: #59656b !important; font-size: 8pt; }
  .source-note { margin-top: 12pt; }
  .source-links { gap: 12pt; margin-top: 0; }
  .source-links a { min-height: 0; }
  .buyer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22pt; margin-top: 22pt; padding-top: 16pt; border-color: #ccc; }
  .buyer-column h3 { font-size: 16pt; }
  .buyer-type { color: #e52c27 !important; }
  .case-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 20pt; }
  .case-image { order: 0; height: 330pt; min-height: 0; }
  .case-content { order: 0; padding: 0; }
  .case-detail, .case-detail[hidden] { display: block !important; min-height: 0; padding: 8pt 0; break-inside: avoid; }
  .case-detail-index { font-size: 7pt; }
  .case-detail-title { font-size: 12pt; }
  .case-detail-copy { font-size: 8.5pt; }
  .case-footnote { font-size: 7pt; padding-top: 10pt; }
  .industry-section .section-topline { margin-bottom: 16pt; }
  .industry-section .section-topline .section-intro { max-width: none; font-size: 9pt; }
  .industry-row { min-height: 0; padding: 13pt 0; grid-template-columns: 20pt .9fr 1.2fr; gap: 12pt; break-inside: avoid; }
  .industry-number { font-size: 8pt; }
  .industry-title { font-size: 17pt; }
  .industry-detail { grid-column: auto; font-size: 9pt; }
  .language-route { max-width: 420pt; margin: 20pt auto 0; }
  .language-node { border: 1px solid #ccc; padding: 15pt; }
  .language-node-value { font-size: 27pt; }
  .language-node-label, .language-node p, .language-tag { font-size: 8pt; }
  .economics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20pt; margin-top: 20pt; }
  .economics-item { display: block; padding-top: 12pt; border-top-width: 1pt; break-inside: avoid; }
  .economics-item > span { margin-bottom: 10pt; }
  .economics-item h3 { font-size: 17pt; }
  .economics-item p { font-size: 9pt; }
  .calculator { padding: 18pt; margin-top: 18pt; border: 1px solid #ccc; background: #fff !important; color: #152027 !important; break-inside: avoid; }
  .calculator > h3, .calculator-result > span:first-child, .result-period, .calculator-note { color: #59656b !important; }
  .calculator-result { margin-top: 0; padding-top: 0; border: 0; }
  .result-value { color: #152027 !important; font-size: 35pt; }
  .founder-quote { font-size: 25pt; }
  .founder-facts { display: flex; gap: 24pt; margin-top: 20pt; }
  .founder-fact { flex: 1; padding-block: 12pt; gap: 10pt; }
  .founder-fact strong { font-size: 26pt; }
  .founder-fact p, .founder-fact span { font-size: 8pt; }
  .investment-layout { display: block; }
  .investment-title { max-width: 95%; font-size: 31pt; }
  .investment-copy { max-width: none; margin-top: 18pt; }
  .contact-email { color: #152027; font-size: 10pt; }
  .site-footer { padding-top: 15pt; }
  .footer-inner { display: flex; }
  .site-footer p { font-size: 7pt; }
  .site-footer .brand-logo { width: 24pt; height: 24pt; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .print-only { display: block; }
  h1, h2, h3 { break-after: avoid; }
  p { orphans: 3; widows: 3; }
}