:root {
    --bg-primary: #fff;
    --bg-alt: #f5f5f7;
    --text-primary: #000;
    --text-secondary: #6e6e73;
    --text-muted: #86868b;
    --accent: #000;
    --border: rgba(0,0,0,0.1);
    --font-main: -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;
    --container: 1100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); color: var(--text-primary); line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: .3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,.8); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,0,0,.05); }
.nav-wrapper { height: 64px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.25rem; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: .9rem; font-weight: 500; color: var(--text-secondary); }
.nav-links a:hover { color: var(--text-primary); }
.nav-cta { background: var(--accent); color: #fff !important; padding: 8px 16px; border-radius: 20px; }

/* Hero */
.hero-section { padding: 160px 0 100px; min-height: 80vh; display: flex; align-items: center; text-align: center; }
.hero-content { max-width: 800px; margin: 0 auto; }
.hero-title { font-size: clamp(2.5rem, 8vw, 4.5rem); line-height: 1.1; font-weight: 400; margin-bottom: 32px; }
.cn-slogan { display: block; margin-bottom: 12px; }
.en-slogan { display: block; font-size: .5em; color: var(--text-secondary); }
.hero-desc { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 48px; }
.btn { padding: 14px 28px; border-radius: 30px; font-weight: 600; cursor: pointer; transition: .3s; border: 1px solid transparent; }
.btn-secondary { background: transparent; border-color: var(--border); }
.btn-secondary:hover { background: var(--bg-alt); border-color: var(--text-primary); }

/* Culture */
.culture-section { padding: 80px 0; }
.bg-alt { background: var(--bg-alt); }
.section-header { margin-bottom: 60px; text-align: center; }
.section-label { display: block; font-size: .875rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; margin-bottom: 16px; }
.section-title { font-size: 2.5rem; font-weight: 700; }

/* Vision */
.vision-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.vision-highlight { font-size: 2rem; font-weight: 700; line-height: 1.3; margin-bottom: 24px; }
.vision-desc { font-size: 1.1rem; color: var(--text-secondary); }
.data-viz-mockup { display: flex; align-items: flex-end; gap: 12px; height: 300px; padding: 40px; background: #fff; border-radius: 24px; border: 1px solid var(--border); }
.viz-bar { flex: 1; background: var(--accent); border-radius: 8px 8px 0 0; transition: 1.5s cubic-bezier(.16,1,.3,1), opacity .5s; opacity: 0; }

/* Values */
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
.value-item { padding: 48px; background: rgba(245,245,247,.5); backdrop-filter: blur(5px); border-radius: 24px; border: 1px solid rgba(0,0,0,.03); transition: .4s cubic-bezier(.16,1,.3,1); }
.value-item:hover { background: #fff; box-shadow: 0 30px 60px rgba(0,0,0,.08); transform: translateY(-10px); }
.value-letter { font-size: 4rem; font-weight: 800; color: var(--accent); margin-bottom: 24px; opacity: .05; transition: .3s; }
.value-item:hover .value-letter { opacity: .15; }
.value-item h3 { font-size: 1.5rem; margin-bottom: 8px; }
.value-item p { color: var(--text-secondary); font-weight: 500; }

/* Footer */
.site-footer { padding: 40px 0; border-top: 1px solid var(--border); text-align: center; color: var(--text-muted); font-size: .85rem; }

/* Mobile */
.mobile-menu-toggle { display: none; flex-direction: column; gap: 6px; cursor: pointer; z-index: 1001; }
.mobile-menu-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); transition: .3s; }

@media (max-width: 768px) {
    .mobile-menu-toggle { display: flex; }
    .nav-links { position: fixed; top: 0; right: -100%; width: 80%; height: 100vh; background: #fff; flex-direction: column; justify-content: center; gap: 40px; transition: .4s cubic-bezier(.16,1,.3,1); box-shadow: -10px 0 30px rgba(0,0,0,.05); display: flex; }
    .nav-links.active { right: 0; }
    .hero-section { padding: 120px 0 60px; }
    .section-title { font-size: 2rem; }
    .vision-grid { grid-template-columns: 1fr; }
    .value-item { padding: 30px; }
}

.abstract-shape { width: 300px; height: 300px; background: linear-gradient(135deg, #f5f5f7, #e5e5e7); border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; margin: 60px auto 0; filter: blur(20px); animation: morph 10s infinite; }
@keyframes morph { 0%,100% { border-radius: 40% 60% 70% 30%/40% 50% 60% 50% } 34% { border-radius: 70% 30% 50% 50%/30% 30% 70% 70% } 67% { border-radius: 100% 60% 60% 100%/100% 100% 60% 60% } }