:root{--canvas: #FAF8F5;--canvas-subtle: #F4EFEA;--card-bg: #FFFFFF;--card-alt: #FDFBF7;--border-light: #EBE5DC;--border-strong: #DDD5C9;--ink-heavy: #1C1917;--ink-body: #44403C;--ink-muted: #78716C;--ink-subtle: #A8A29E;--accent-teal: #0D9488;--accent-teal-light: #F0FDFA;--accent-teal-hover: #0F766E;--accent-blue: #2563EB;--accent-blue-light: #EFF6FF;--accent-orange: #EA580C;--accent-orange-light: #FFF7ED;--shadow-paper: 0 4px 20px -2px rgba(28, 25, 23, .05), 0 2px 6px -1px rgba(28, 25, 23, .03);--shadow-lift: 0 12px 30px -4px rgba(28, 25, 23, .08), 0 4px 10px -2px rgba(28, 25, 23, .04);--radius-lg: 20px;--radius-md: 14px;--radius-sm: 8px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-family:-apple-system,BlinkMacSystemFont,Plus Jakarta Sans,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--ink-body);background-color:var(--canvas);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{overflow-x:hidden;line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 24px}@media(max-width:640px){.container{padding:0 16px}}.paper-card{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-paper);transition:transform .25s cubic-bezier(.16,1,.3,1),box-shadow .25s cubic-bezier(.16,1,.3,1),border-color .2s ease}.paper-card:hover{box-shadow:var(--shadow-lift);border-color:var(--border-strong)}.badge-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;font-size:.8125rem;font-weight:600;border-radius:9999px;letter-spacing:.02em}.badge-teal{background-color:var(--accent-teal-light);color:var(--accent-teal);border:1px solid rgba(13,148,136,.2)}.badge-blue{background-color:var(--accent-blue-light);color:var(--accent-blue);border:1px solid rgba(37,99,235,.2)}.badge-orange{background-color:var(--accent-orange-light);color:var(--accent-orange);border:1px solid rgba(234,88,12,.2)}.section-header{text-align:center;max-width:760px;margin:0 auto 52px}.section-header h2{font-size:2.25rem;font-weight:800;color:var(--ink-heavy);line-height:1.25;margin:12px 0 16px;letter-spacing:-.02em}.section-header p{font-size:1.125rem;color:var(--ink-muted)}@media(max-width:640px){.section-header h2{font-size:1.75rem}.section-header p{font-size:1rem}}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;background-color:var(--ink-heavy);color:#fff;padding:13px 24px;font-size:.9375rem;font-weight:600;border-radius:12px;text-decoration:none;cursor:pointer;border:none;transition:all .2s cubic-bezier(.16,1,.3,1);box-shadow:0 4px 12px #1c191726}.btn-primary:hover{background-color:#000;transform:translateY(-2px);box-shadow:0 6px 18px #1c191738}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background-color:var(--card-bg);color:var(--ink-heavy);padding:13px 22px;font-size:.9375rem;font-weight:600;border-radius:12px;text-decoration:none;cursor:pointer;border:1px solid var(--border-strong);transition:all .2s cubic-bezier(.16,1,.3,1)}.btn-secondary:hover{background-color:var(--canvas-subtle);border-color:var(--ink-subtle);transform:translateY(-2px)}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;background:var(--border-light);border-radius:4px;outline:none;transition:background .2s}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:22px;height:22px;border-radius:50%;background:var(--accent-teal);cursor:pointer;box-shadow:0 2px 6px #0d948866;border:2px solid #ffffff;transition:transform .15s ease,background .15s ease}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--canvas)}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--ink-subtle)}