:root {
  --brand: #ff6a00;
  --brand-2: #c8102e;
  --brand-deep: #8b0a1f;
  --ink: #111;
  --text-1: #111;
  --text-2: #5a5a5a;
  --text-3: #888;
  --line: #e5e5e5;
  --line-2: #f0f0f0;
  --bg: #fff;
  --bg-2: #fafafa;
  --bg-3: #f5f5f5;
  --f-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --f-serif: 'Noto Serif SC', Georgia, serif;
  --ease: cubic-bezier(.2,.7,.2,1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--f-sans); font-size: 16px; line-height: 1.6; color: var(--text-1); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: 0; background: 0; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }
@media (max-width: 768px) { .container { padding: 0 20px; } }

.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid transparent; transition: border-color .3s var(--ease); }
.header.scrolled { border-bottom-color: var(--line); }
.nav { display: flex; align-items: center; height: 72px; gap: 48px; }
.nav-brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 18px; letter-spacing: -.01em; color: var(--ink); }
.nav-brand img { width: 32px; height: 32px; }
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand-text small { font-size: 11px; font-weight: 500; color: var(--text-3); letter-spacing: .04em; text-transform: uppercase; }
.nav-links { display: flex; gap: 36px; flex: 1; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-1); padding: 4px 0; transition: color .2s; }
.nav-links a:hover { color: var(--brand); }
.nav-actions { display: flex; align-items: center; gap: 24px; }
.lang-switch { display: flex; gap: 8px; font-size: 13px; color: var(--text-2); }
.lang-switch a { padding: 4px 8px; border-radius: 4px; transition: all .2s; }
.lang-switch a.active { color: var(--ink); font-weight: 600; }
.lang-switch a:hover { background: var(--bg-3); }
@media (max-width: 980px) { .nav-links { display: none; } }

.hero-stories { border-bottom: 1px solid var(--line); }
.hero-stories-inner { display: grid; grid-template-columns: 1fr 1fr; min-height: 560px; }
.hero-feature { position: relative; padding: 80px; background: linear-gradient(135deg, #1a1a1a 0%, #2a1010 100%); color: white; display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; }
.hero-feature::before { content: ''; position: absolute; inset: 0; background: radial-gradient(at 20% 80%, rgba(255,106,0,.3) 0%, transparent 50%), radial-gradient(at 80% 20%, rgba(200,16,46,.3) 0%, transparent 50%); }
.hero-feature::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 60px 60px; mask: radial-gradient(ellipse 80% 80% at center, black, transparent 70%); }
.hero-feature > * { position: relative; z-index: 1; }
.hero-feature .eyebrow { font-size: 12px; font-weight: 600; letter-spacing: .15em; text-transform: uppercase; color: rgba(255,255,255,.6); margin-bottom: 24px; }
.hero-feature h1 { font-size: clamp(36px, 4.5vw, 56px); font-weight: 700; line-height: 1.1; letter-spacing: -.02em; margin-bottom: 24px; }
.hero-feature p { font-size: 17px; line-height: 1.6; color: rgba(255,255,255,.85); max-width: 520px; margin-bottom: 36px; }
.hero-feature .read-more { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; color: white; padding: 14px 24px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 999px; transition: all .25s var(--ease); align-self: flex-start; }
.hero-feature .read-more:hover { background: var(--brand); border-color: var(--brand); transform: translateX(4px); }

.hero-news { background: var(--bg); padding: 56px 64px; display: flex; flex-direction: column; }
.hero-news-head { font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--text-3); margin-bottom: 24px; display: flex; align-items: center; gap: 12px; }
.hero-news-head::after { content: ''; flex: 1; height: 1px; background: var(--line); }
.news-item { padding: 22px 0; border-bottom: 1px solid var(--line-2); display: block; transition: padding .2s var(--ease); }
.news-item:hover { padding-left: 8px; }
.news-item:hover h3 { color: var(--brand); }
.news-item:last-child { border-bottom: 0; }
.news-item .news-date { font-size: 12px; font-weight: 500; color: var(--text-3); margin-bottom: 8px; }
.news-item h3 { font-size: 18px; font-weight: 600; line-height: 1.4; letter-spacing: -.01em; color: var(--ink); transition: color .2s; }
@media (max-width: 980px) { .hero-stories-inner { grid-template-columns: 1fr; } .hero-feature { padding: 56px 32px; min-height: 440px; } .hero-news { padding: 40px 32px; } }

.mission { padding: 160px 0; text-align: center; border-bottom: 1px solid var(--line); }
.mission-inner { max-width: 1100px; margin: 0 auto; padding: 0 40px; }
.mission-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--brand); margin-bottom: 32px; }
.mission h2 { font-size: clamp(32px, 4vw, 56px); font-weight: 700; line-height: 1.2; letter-spacing: -.02em; color: var(--ink); text-transform: uppercase; }
.mission .mission-zh { font-family: var(--f-serif); font-size: clamp(22px, 2.4vw, 32px); line-height: 1.5; color: var(--text-2); margin-top: 32px; letter-spacing: .02em; font-weight: 400; }
@media (max-width: 768px) { .mission { padding: 100px 0; } }

section.std { padding: 120px 0; border-bottom: 1px solid var(--line); }
section.std.alt { background: var(--bg-2); }
.section-head { margin-bottom: 64px; max-width: 800px; }
.section-head .eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--brand); margin-bottom: 20px; display: inline-block; }
.section-head h2 { font-size: clamp(32px, 4vw, 48px); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; color: var(--ink); }
.section-head p { font-size: 18px; color: var(--text-2); margin-top: 20px; max-width: 720px; line-height: 1.6; }

.businesses { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.biz { background: white; padding: 56px 40px; min-height: 320px; position: relative; display: flex; flex-direction: column; transition: background .3s var(--ease); grid-column: span 4; }
.biz:hover { background: var(--bg-2); }
.biz.wide { grid-column: span 6; }
.biz.full { grid-column: span 12; background: linear-gradient(135deg, #fff 0%, #fff5ec 100%); }
.biz .biz-num { font-size: 14px; font-weight: 700; color: var(--brand); letter-spacing: .04em; margin-bottom: 24px; }
.biz h3 { font-size: 24px; font-weight: 700; letter-spacing: -.01em; margin-bottom: 12px; color: var(--ink); }
.biz h3 small { display: block; font-size: 14px; font-weight: 500; color: var(--text-3); margin-top: 4px; letter-spacing: 0; }
.biz .biz-tagline { font-size: 15px; color: var(--text-2); margin-bottom: 20px; line-height: 1.5; }
.biz .biz-desc { font-size: 14px; color: var(--text-2); line-height: 1.7; flex: 1; }
.biz .biz-meta { display: flex; gap: 24px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.biz .biz-meta b { display: block; font-size: 22px; font-weight: 700; color: var(--ink); }
.biz .biz-meta span { font-size: 12px; color: var(--text-3); margin-top: 4px; }
.biz .biz-cta { margin-top: 24px; display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--ink); transition: color .2s, gap .2s; }
.biz:hover .biz-cta { color: var(--brand); gap: 12px; }
.biz .biz-status { position: absolute; top: 32px; right: 40px; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.biz .biz-status.live { color: #00875a; }
.biz .biz-status.live::before { content: '\2022'; margin-right: 6px; }
.biz .biz-status.coming { color: var(--text-3); }
@media (max-width: 980px) { .biz, .biz.wide, .biz.full { grid-column: span 12; min-height: 0; padding: 40px 28px; } }

.numbers { padding: 120px 0; border-bottom: 1px solid var(--line); background: var(--bg); }
.numbers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.num-cell { padding: 32px 24px 32px 0; border-right: 1px solid var(--line); }
.num-cell:last-child { border-right: 0; }
.num-cell b { font-size: clamp(48px, 5.5vw, 80px); font-weight: 700; letter-spacing: -.04em; line-height: 1; color: var(--ink); display: block; margin-bottom: 16px; }
.num-cell b sup { font-size: .4em; color: var(--brand); margin-left: 4px; }
.num-cell span { font-size: 14px; color: var(--text-2); display: block; line-height: 1.5; }
@media (max-width: 768px) { .numbers-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 0; } .num-cell { border-right: 0; padding: 0 0 24px; border-bottom: 1px solid var(--line); } }

.terms-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.term-card { padding: 40px; background: white; border: 1px solid var(--line); transition: all .3s var(--ease); }
.term-card:hover { border-color: var(--brand); transform: translateY(-2px); }
.term-card .term-num { font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .15em; margin-bottom: 24px; }
.term-card h3 { font-size: 22px; font-weight: 700; line-height: 1.25; color: var(--ink); letter-spacing: -.01em; }
.term-card .term-en { font-size: 13px; color: var(--text-3); margin: 8px 0 16px; font-style: italic; }
.term-card p { font-size: 14px; color: var(--text-2); line-height: 1.7; }
.term-card .term-byline { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; color: var(--text-3); letter-spacing: .04em; }
@media (max-width: 980px) { .terms-grid { grid-template-columns: 1fr; } }

.press-list { list-style: none; }
.press-list li { padding: 28px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 140px 1fr; gap: 32px; align-items: baseline; transition: padding .2s; }
.press-list li:hover { padding-left: 8px; }
.press-list li:hover h3 { color: var(--brand); }
.press-list .press-date, .press-list .press-meta { font-size: 13px; font-weight: 500; color: var(--text-3); }
.press-list h3 { font-size: 19px; font-weight: 600; line-height: 1.45; color: var(--ink); transition: color .2s; }
@media (max-width: 768px) { .press-list li { grid-template-columns: 1fr; gap: 8px; } }

.faq-list { max-width: 900px; margin: 0 auto; }
.faq-list details { border-bottom: 1px solid var(--line); padding: 28px 0; }
.faq-list summary { font-size: 19px; font-weight: 600; color: var(--ink); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: '+'; font-size: 24px; font-weight: 300; color: var(--text-3); transition: transform .3s; }
.faq-list details[open] summary::after { transform: rotate(45deg); color: var(--brand); }
.faq-list details[open] summary { color: var(--brand); }
.faq-list .faq-a { padding-top: 20px; font-size: 15px; line-height: 1.75; color: var(--text-2); }

.page-hero, .hero { padding: 120px 0 80px; border-bottom: 1px solid var(--line); }
.page-hero .eyebrow, .hero .eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--brand); margin-bottom: 24px; display: inline-block; }
.page-hero h1, .hero h1 { font-size: clamp(40px, 5.5vw, 72px); font-weight: 700; line-height: 1.1; letter-spacing: -.025em; color: var(--ink); max-width: 1100px; margin-top: 16px; }
.page-hero .lead, .hero .hero-lead { margin-top: 32px; max-width: 800px; font-size: 20px; line-height: 1.6; color: var(--text-2); }
.highlight { color: var(--brand); }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--brand); }

.product-detail .product-hero { padding: 100px 0 80px; border-bottom: 1px solid var(--line); }
.product-detail h1 { font-size: clamp(40px, 5vw, 64px); font-weight: 700; letter-spacing: -.025em; line-height: 1.1; max-width: 1000px; margin-top: 16px; }
.product-detail .lead { margin-top: 24px; max-width: 800px; font-size: 22px; color: var(--text-2); line-height: 1.5; }
.answer-capsule { margin-top: 40px; max-width: 900px; padding: 32px; background: var(--bg-2); border-left: 4px solid var(--brand); font-size: 16px; line-height: 1.75; color: var(--text-1); }
.product-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px; border-radius: 999px; font-size: 14px; font-weight: 600; transition: all .2s var(--ease); }
.btn-primary { background: var(--ink); color: white; }
.btn-primary:hover { background: var(--brand); transform: translateY(-1px); }
.btn-secondary { background: white; color: var(--ink); border: 1px solid var(--line); }
.btn-secondary:hover { border-color: var(--ink); }

.metric-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-left: 1px solid var(--line); }
.metric-card { padding: 40px; border-right: 1px solid var(--line); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric-card b { display: block; font-size: 56px; font-weight: 700; letter-spacing: -.03em; color: var(--ink); }
.metric-card span { font-size: 13px; color: var(--text-3); margin-top: 8px; display: block; }
@media (max-width: 768px) { .metric-cards { grid-template-columns: 1fr; } .metric-card { border-left: 1px solid var(--line); } }

.brand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.brand-card { padding: 40px; background: var(--bg-2); border-left: 4px solid var(--brand); }
.brand-card h3 { font-size: 28px; margin-bottom: 16px; letter-spacing: -.01em; }
.brand-card p { font-size: 14px; color: var(--text-2); margin-bottom: 8px; }
@media (max-width: 768px) { .brand-grid { grid-template-columns: 1fr; } }

.capability-list { columns: 2; column-gap: 48px; max-width: 1000px; list-style: none; }
.capability-list li { font-size: 15px; line-height: 1.7; padding: 10px 0; border-bottom: 1px solid var(--line-2); break-inside: avoid; }
.capability-list li::before { content: '\2192'; color: var(--brand); margin-right: 12px; font-weight: 600; }
@media (max-width: 768px) { .capability-list { columns: 1; } }

.tech-list, .qual-list, .partner-list { list-style: none; }
.tech-list li, .qual-list li, .partner-list li { font-size: 15px; padding: 14px 0; border-bottom: 1px solid var(--line-2); color: var(--text-1); }
.tech-list li::before, .qual-list li::before, .partner-list li::before { content: '\2014'; color: var(--brand); margin-right: 12px; font-weight: 700; }

.country-flags { display: flex; flex-wrap: wrap; gap: 8px; }
.flag-pill { padding: 8px 16px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 999px; font-size: 13px; color: var(--text-1); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
@media (max-width: 980px) { .two-col { grid-template-columns: 1fr; gap: 48px; } }

.engine-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border: 1px solid var(--line); }
.engine-card { padding: 56px 48px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .3s; }
.engine-card:nth-child(2n) { border-right: 0; }
.engine-card:nth-last-child(-n+2) { border-bottom: 0; }
.engine-card:hover { background: var(--bg-2); }
.engine-tag { font-size: 11px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; color: var(--brand); }
.engine-card h3 { font-size: 32px; margin: 16px 0 20px; font-weight: 700; letter-spacing: -.02em; }
.engine-card p { font-size: 15px; color: var(--text-2); line-height: 1.7; }
.engine-card ul { margin-top: 20px; padding-left: 20px; color: var(--text-2); font-size: 14px; line-height: 1.9; }
@media (max-width: 980px) { .engine-grid { grid-template-columns: 1fr; } .engine-card { border-right: 0; } .engine-card:nth-last-child(2) { border-bottom: 1px solid var(--line); } }

.founder-card { display: grid; grid-template-columns: 240px 1fr; gap: 56px; padding: 56px 0; }
.founder-portrait { width: 200px; height: 200px; border-radius: 50%; background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%); display: flex; align-items: center; justify-content: center; color: white; font-size: 80px; font-weight: 700; }
.founder-info h3 { font-size: 32px; font-weight: 700; letter-spacing: -.01em; }
.founder-info .founder-en { font-size: 16px; color: var(--text-3); margin-top: 4px; font-style: italic; }
.founder-info .founder-meta { font-size: 14px; color: var(--text-2); margin: 12px 0 24px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.founder-info p { font-size: 16px; line-height: 1.75; color: var(--text-2); }
@media (max-width: 768px) { .founder-card { grid-template-columns: 1fr; gap: 32px; } }

.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.bento-cell { background: white; padding: 40px; transition: background .3s; grid-column: span 6; min-height: 240px; position: relative; display: flex; flex-direction: column; }
.bento-cell:hover { background: var(--bg-2); }
.bento-cell.featured { grid-column: span 12; min-height: 320px; }
.bento-cell h3 { font-size: 22px; margin-bottom: 12px; }
.bento-cell .tagline { color: var(--text-2); margin-bottom: 12px; }
.bento-cell .desc { font-size: 14px; color: var(--text-2); flex: 1; }
.bento-cell .bento-status { position: absolute; top: 24px; right: 24px; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.bento-cell .bento-status.live { color: #00875a; }
.bento-cell .bento-status.coming { color: var(--text-3); }
.bento-cell .bento-arrow { margin-top: 16px; color: var(--text-3); transition: color .2s, transform .2s; }
.bento-cell:hover .bento-arrow { color: var(--brand); transform: translateX(4px); }
@media (max-width: 980px) { .bento-cell, .bento-cell.featured { grid-column: span 12; } }

.footer { background: var(--bg); border-top: 1px solid var(--line); padding: 80px 0 40px; }
.footer-top { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 64px; margin-bottom: 64px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer-brand .footer-logo img { width: 32px; height: 32px; }
.footer-brand strong { font-size: 16px; font-weight: 700; color: var(--ink); }
.footer-brand p { font-size: 13px; color: var(--text-3); line-height: 1.6; max-width: 340px; }
.footer-col h4 { font-size: 11px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; color: var(--ink); margin-bottom: 24px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 14px; }
.footer-col a { font-size: 14px; color: var(--text-2); transition: color .15s; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { padding-top: 32px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-bottom p { font-size: 12px; color: var(--text-3); }
.footer-bottom .footer-langs { display: flex; gap: 16px; font-size: 13px; }
.footer-bottom .footer-langs a { color: var(--text-2); }
.footer-bottom .footer-langs a:hover { color: var(--brand); }
@media (max-width: 980px) { .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; } }
@media (max-width: 600px) { .footer-top { grid-template-columns: 1fr; } }

[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].visible { opacity: 1; transform: none; }