:root{--color-primary: #0077cc;--color-primary-light: #3399dd;--color-primary-dark: #005599;--color-primary-bg: #e8f4fd;--color-secondary: #00b894;--color-secondary-light: #55efc4;--color-secondary-dark: #00896e;--color-warning: #e17055;--color-danger: #d63031;--color-success: #27ae60;--color-live: #e84393;--color-text-primary: #1a1a1a;--color-text-secondary: #334155;--color-text-tertiary: #64748b;--color-text-disabled: #94a3b8;--color-text-inverse: #ffffff;--color-text-link: #0077cc;--color-bg-page: #f8fafc;--color-bg-card: #ffffff;--color-bg-section: #f1f5f9;--color-bg-dark: #0f172a;--color-bg-overlay: rgba(0, 0, 0, .5);--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-border-dark: #cbd5e1;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 1px 3px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1), 0 4px 6px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1), 0 10px 10px rgba(0, 0, 0, .04);--shadow-card: 0 2px 8px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--shadow-hover: 0 8px 24px rgba(0, 0, 0, .12), 0 2px 6px rgba(0, 0, 0, .06);--font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;--font-size-xs: 14px;--font-size-sm: 14px;--font-size-md: 16px;--font-size-lg: 18px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 30px;--font-size-4xl: 36px;--line-height-tight: 1.25;--line-height-base: 1.5;--line-height-relaxed: 1.75;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--space-20: 80px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-2xl: 24px;--radius-full: 9999px;--container-max: 1200px;--container-padding: 24px;--header-height: 64px;--header-height-mobile: 56px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;--z-dropdown: 100;--z-sticky: 200;--z-fixed: 300;--z-modal-backdrop: 400;--z-modal: 500;--z-tooltip: 600;--z-toast: 700}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{font-family:var(--font-family);font-size:var(--font-size-sm);line-height:var(--line-height-base);color:var(--color-text-primary);background-color:var(--color-bg-page);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img,video{max-width:100%;height:auto;display:block}a{color:var(--color-text-link);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark)}ul,ol{list-style:none}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit;line-height:inherit}input,textarea,select{font-family:inherit;font-size:inherit}.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:44px;padding:0 var(--space-6);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:500;cursor:pointer;transition:all var(--transition-fast);border:2px solid transparent;white-space:nowrap;-webkit-user-select:none;user-select:none}.btn-primary{background-color:var(--color-primary);color:var(--color-text-inverse);border-color:var(--color-primary)}.btn-primary:hover{background-color:var(--color-primary-dark);border-color:var(--color-primary-dark)}.btn-primary:active{opacity:.9;transform:translateY(1px)}.btn-primary:disabled{background-color:var(--color-text-disabled);border-color:var(--color-text-disabled);cursor:not-allowed;transform:none}.btn-outline{background-color:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn-outline:hover{background-color:var(--color-primary-bg)}.btn-outline:active{opacity:.9}.btn-outline:disabled{color:var(--color-text-disabled);border-color:var(--color-text-disabled);cursor:not-allowed}.card{background-color:var(--color-bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden;transition:box-shadow var(--transition-base),transform var(--transition-base)}.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.section-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-text-primary);line-height:var(--line-height-tight)}.section-subtitle{font-size:var(--font-size-md);color:var(--color-text-tertiary);line-height:var(--line-height-relaxed);margin-top:var(--space-2)}.loading-spinner{display:flex;align-items:center;justify-content:center;padding:var(--space-16)}.spinner{width:40px;height:40px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-20) var(--space-6);text-align:center;gap:var(--space-4)}.empty-state-icon{font-size:64px;line-height:1;opacity:.3}.empty-state-text{font-size:var(--font-size-md);color:var(--color-text-tertiary)}@media (max-width: 767px){html{font-size:16px}.container{padding:0 16px}.section-title{font-size:var(--font-size-xl)}}