:root{--color-primary: #1a365d;--color-primary-dark: #0f2440;--color-primary-light: #2c5282;--color-primary-rgb: 26, 54, 93;--color-accent: #d97706;--color-accent-dark: #b45309;--color-accent-light: #fbbf24;--color-accent-rgb: 217, 119, 6;--color-bg: #ffffff;--color-bg-alt: #f1f5f9;--color-bg-subtle: #f8fafc;--color-text: #1e293b;--color-text-secondary: #475569;--color-text-muted: #94a3b8;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-border-strong: #cbd5e1;--color-dark-bg: #0f172a;--color-dark-bg-alt: #1e293b;--color-dark-text: #e2e8f0;--color-dark-text-muted: #94a3b8;--color-dark-border: #334155;--font-sans: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;--text-xs: clamp(.85rem, 1.2vw, 1rem);--text-sm: clamp(1rem, 1.8vw, 1.15rem);--text-base: clamp(1.3rem, 2.5vw, 1.65rem);--text-lg: clamp(1.5rem, 3vw, 1.9rem);--text-xl: clamp(1.7rem, 3.5vw, 2.2rem);--text-2xl: clamp(2rem, 4vw, 2.6rem);--text-3xl: clamp(2.3rem, 4.5vw, 3rem);--text-4xl: clamp(2.6rem, 5vw, 3.5rem);--text-5xl: clamp(3rem, 6vw, 4.2rem);--text-6xl: clamp(3.5rem, 7vw, 5rem);--fw-light: 300;--fw-normal: 400;--fw-medium: 500;--fw-semibold: 600;--fw-bold: 700;--fw-heavy: 800;--lh-tight: 1.15;--lh-snug: 1.3;--lh-normal: 1.6;--lh-relaxed:1.75;--section-gap: clamp(60px, 10vh, 100px);--content-width: 1440px;--content-padding: clamp(1.5rem, 5vw, 4rem);--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08);--shadow-xl: 0 12px 40px rgba(0, 0, 0, .1);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--header-height: 64px}[data-theme=dark]{--color-bg: #0f172a;--color-bg-alt: #1e293b;--color-bg-subtle: #1a2332;--color-text: #e2e8f0;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-border: #334155;--color-border-light: #1e293b;--color-border-strong: #475569;--color-dark-bg: #0a0f1a;--color-dark-bg-alt: #131c2e;--color-dark-text: #cbd5e1;--color-dark-text-muted: #64748b;--color-dark-border: #1e293b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .2);--shadow-md: 0 4px 12px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .35);--shadow-xl: 0 12px 40px rgba(0, 0, 0, .4)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:1.6;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}ul,ol{list-style:none}.sec{padding:var(--section-gap) 0;content-visibility:auto;contain-intrinsic-size:1px 500px}.sec-wrap{max-width:var(--content-width);margin:0 auto;padding:0 var(--content-padding)}.sec-head{text-align:center;margin-bottom:clamp(40px,6vh,60px)}.sec-head.sec-head--left{text-align:left}.sec-label{font-size:var(--text-xs);font-weight:var(--fw-medium);color:var(--color-accent);text-transform:uppercase;letter-spacing:.12em;margin-bottom:.5rem}.sec-ttl{font-size:var(--text-4xl);font-weight:var(--fw-bold);color:var(--color-text);line-height:var(--lh-snug)}.sec-sub{font-size:var(--text-lg);font-weight:var(--fw-light);color:var(--color-text-secondary);margin-top:.6rem;max-width:780px;margin-left:auto;margin-right:auto;line-height:var(--lh-relaxed)}.sec-full{width:100vw;position:relative;left:50%;right:50%;margin-left:-50vw;margin-right:-50vw}.card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:transform var(--transition-base),box-shadow var(--transition-base)}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.img-cover{width:100%;height:100%;object-fit:cover}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;font-size:var(--text-base);font-weight:600;border-radius:var(--radius-md);transition:all var(--transition-fast);white-space:nowrap}.btn-primary{background:var(--color-primary);color:#fff;border:2px solid var(--color-primary)}.btn-primary:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark)}.btn-outline{background:transparent;color:var(--color-primary);border:2px solid var(--color-primary)}.btn-outline:hover{background:var(--color-primary);color:#fff}.btn-outline-light{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4)}.btn-outline-light:hover{background:#ffffff1a;border-color:#ffffffb3}.btn-accent{background:var(--color-accent);color:#fff;border:2px solid var(--color-accent)}.btn-accent:hover{background:var(--color-accent-dark);border-color:var(--color-accent-dark)}.btn-link{padding:0;font-weight:500;color:var(--color-primary);background:none;border:none;transition:color var(--transition-fast)}.btn-link:hover{color:var(--color-primary-dark)}.btn-link:after{content:" →";transition:transform var(--transition-fast);display:inline-block}.btn-link:hover:after{transform:translate(4px)}.tag{display:inline-block;padding:4px 12px;font-size:var(--text-xs);font-weight:500;border-radius:9999px;border:1px solid var(--color-border-strong);color:var(--color-text-secondary)}.tag.tag-accent{background:rgba(var(--color-accent-rgb),.1);color:var(--color-accent);border-color:rgba(var(--color-accent-rgb),.3)}.divider{border:none;border-top:1px solid var(--color-border);margin:0}.mt-0{margin-top:0}.mt-sm{margin-top:8px}.mt-md{margin-top:16px}.mt-lg{margin-top:24px}.mt-xl{margin-top:40px}.mb-0{margin-bottom:0}.mb-sm{margin-bottom:8px}.mb-md{margin-bottom:16px}.mb-lg{margin-bottom:24px}.mb-xl{margin-bottom:40px}.grid{display:grid}.grid-2{grid-template-columns:repeat(2,1fr);gap:24px}.grid-3{grid-template-columns:repeat(3,1fr);gap:24px}.grid-4{grid-template-columns:repeat(4,1fr);gap:24px}@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.flex-center{display:flex;align-items:center;justify-content:center}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes fadeInUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.anim-fade-up{animation:fadeInUp .6s var(--transition-slow) both}.anim-delay-1{animation-delay:.1s}.anim-delay-2{animation-delay:.2s}.anim-delay-3{animation-delay:.3s}.anim-delay-4{animation-delay:.4s}.anim-delay-5{animation-delay:.5s}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::selection{background:rgba(var(--color-primary-rgb),.15);color:var(--color-text)}