:root{--spacing-base: 4px;--spacing-1: calc(var(--spacing-base) * 1);--spacing-2: calc(var(--spacing-base) * 2);--spacing-3: calc(var(--spacing-base) * 3);--spacing-4: calc(var(--spacing-base) * 4);--spacing-5: calc(var(--spacing-base) * 5);--spacing-6: calc(var(--spacing-base) * 6);--spacing-8: calc(var(--spacing-base) * 8);--spacing-10: calc(var(--spacing-base) * 10);--spacing-12: calc(var(--spacing-base) * 12);--spacing-16: calc(var(--spacing-base) * 16);--spacing-20: calc(var(--spacing-base) * 20);--spacing-24: calc(var(--spacing-base) * 24);--font-family-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-family-display: "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs: 12px;--font-size-sm: 14px;--font-size-base: 16px;--font-size-lg: 18px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 28px;--font-size-4xl: 32px;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.2;--line-height-normal: 1.5;--line-height-relaxed: 1.6;--line-height-loose: 1.8;--letter-spacing-tight: -.02em;--letter-spacing-normal: 0;--letter-spacing-wide: .02em;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px;--radius-full: 9999px;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .05);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .08);--shadow-md: 0 4px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .12);--shadow-xl: 0 12px 24px rgba(0, 0, 0, .15);--shadow-2xl: 0 16px 32px rgba(0, 0, 0, .18);--shadow-colored-sm: 0 2px 8px rgba(102, 126, 234, .15);--shadow-colored-md: 0 4px 15px rgba(102, 126, 234, .25);--shadow-colored-lg: 0 8px 24px rgba(102, 126, 234, .35);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .2s cubic-bezier(.4, 0, .2, 1);--transition-slow: .3s cubic-bezier(.4, 0, .2, 1);--transition-slower: .4s cubic-bezier(.4, 0, .2, 1);--ease-in-out: cubic-bezier(.4, 0, .2, 1);--ease-out: cubic-bezier(0, 0, .2, 1);--ease-in: cubic-bezier(.4, 0, 1, 1);--body-bg: #FFFFFF;--header-bg: rgba(255, 255, 255, .7);--footer-bg: #F8F8F8;--content-bg: #FFFFFF;--text-color: rgba(0, 0, 0, .88);--text-color-primary: rgba(0, 0, 0, .88);--text-color-secondary: rgba(0, 0, 0, .65);--text-color-tertiary: rgba(0, 0, 0, .45);--glass-border: rgba(0, 0, 0, .15);--glass-shadow: rgba(0, 0, 0, .15);--glass-shadow-hover: rgba(0, 0, 0, .25);--gradient-1: #667eea;--gradient-2: #764ba2;--gradient-3: #f093fb;--gradient-4: #4facfe;--menu-active-bg: rgba(102, 126, 234, .3);--menu-active-border: rgba(102, 126, 234, .5);--menu-active-text: rgba(102, 126, 234, 1);--footer-border: #EEEEEE;--footer-title-color: #333333;--footer-link-color: #666666;--footer-copyright-color: #999999;--card-bg: #FFFFFF;--card-border: rgba(0, 0, 0, .08);--card-shadow: rgba(0, 0, 0, .1);--card-shadow-hover: rgba(0, 0, 0, .15);--accent-color: #FF9900;--accent-hover: #FF8800;--min-touch-target: 44px}.dark{--body-bg: #1a1a1a;--header-bg: rgba(20, 20, 20, .7);--footer-bg: #1f1f1f;--content-bg: #1a1a1a;--text-color: rgba(255, 255, 255, .85);--text-color-primary: rgba(255, 255, 255, .88);--text-color-secondary: rgba(255, 255, 255, .65);--text-color-tertiary: rgba(255, 255, 255, .45);--editor-border: var(--card-border);--editor-toolbar-bg: var(--card-bg);--editor-toolbar-border: var(--card-border);--editor-content-bg: var(--content-bg);--editor-content-color: var(--text-color-primary);--editor-placeholder-color: var(--text-color-tertiary);--glass-border: rgba(255, 255, 255, .1);--glass-shadow: rgba(0, 0, 0, .3);--glass-shadow-hover: rgba(0, 0, 0, .5);--gradient-1: #1a1a2e;--gradient-2: #16213e;--gradient-3: #0f3460;--gradient-4: #533483;--menu-active-bg: rgba(255, 255, 255, .25);--menu-active-border: rgba(255, 255, 255, .4);--menu-active-text: rgba(255, 255, 255, 1);--footer-border: rgba(255, 255, 255, .1);--footer-title-color: rgba(255, 255, 255, .85);--footer-link-color: rgba(255, 255, 255, .65);--footer-copyright-color: rgba(255, 255, 255, .5);--card-bg: #2a2a2a;--card-border: rgba(255, 255, 255, .15);--card-shadow: rgba(0, 0, 0, .4);--card-shadow-hover: rgba(0, 0, 0, .6)}*{margin:0;padding:0;box-sizing:border-box}body{background:var(--body-bg);color:var(--text-color-primary);transition:background-color var(--transition-base),color var(--transition-base);min-height:100vh;position:relative;overflow-x:hidden;font-family:var(--font-family-primary);font-size:var(--font-size-base);line-height:var(--line-height-normal)}.app-container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-4)}.app-header{background:var(--header-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--glass-border);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:1000;transition:all var(--transition-base);padding:var(--spacing-6) 0;min-height:100px}.header-content{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-5)}.logo-section{display:flex;flex-direction:column;gap:var(--spacing-1)}.logo-link{text-decoration:none;color:inherit;display:inline-block;cursor:pointer}.logo{font-family:var(--font-family-display);font-weight:var(--font-weight-bold);font-size:var(--font-size-4xl);color:var(--text-color-primary);margin:0;display:flex;align-items:center;line-height:var(--line-height-tight);transition:color var(--transition-base)}.logo-text{display:inline-block}.logo-paw{display:inline-flex;align-items:center;justify-content:center;margin:0 2px;vertical-align:middle}.paw-icon{width:24px;height:24px;color:var(--accent-color)}.slogan{font-family:var(--font-family-primary);font-weight:var(--font-weight-normal);font-size:var(--font-size-base);color:var(--text-color-secondary);margin:0;line-height:var(--line-height-tight);transition:color var(--transition-base)}.header-right,.header-nav{display:flex;align-items:center;gap:var(--spacing-4)}.theme-switcher{margin-left:8px}.theme-button{display:flex;align-items:center;justify-content:center;font-size:var(--font-size-lg);width:var(--min-touch-target);height:var(--min-touch-target);min-width:var(--min-touch-target);min-height:var(--min-touch-target);background:var(--header-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-sm);transition:all var(--transition-base);color:var(--text-color-primary);cursor:pointer;padding:0}.theme-button:hover{background:#ff99001a;border-color:#ff99004d;transform:translateY(-1px);box-shadow:var(--shadow-md)}.theme-icon{width:1em;height:1em;font-size:var(--font-size-lg);transition:transform var(--transition-fast)}.theme-button:hover .theme-icon{transform:scale(1.1)}.nav-link{font-family:var(--font-family-primary);font-weight:var(--font-weight-medium);font-size:var(--font-size-base);color:var(--text-color-primary);text-decoration:none;padding:var(--spacing-2) var(--spacing-4);border-radius:var(--radius-sm);transition:all var(--transition-base)}.nav-link:hover{background:#667eea1a;color:var(--menu-active-text)}.nav-link.active{background:var(--menu-active-bg);color:var(--menu-active-text);border-bottom:2px solid var(--menu-active-border)}.nav-dropdown{position:relative}.nav-dropdown-toggle{display:flex;align-items:center;gap:var(--spacing-1);cursor:pointer;border:none;background:transparent}.dropdown-arrow{transition:transform var(--transition-base)}.nav-dropdown-toggle[aria-expanded=true] .dropdown-arrow{transform:rotate(180deg)}.nav-dropdown-menu{position:absolute;top:100%;left:0;margin-top:var(--spacing-2);min-width:200px;background:#fffffff2;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border:1px solid var(--glass-border);border-radius:var(--radius-md);box-shadow:var(--shadow-xl);padding:var(--spacing-2);list-style:none;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all var(--transition-base);z-index:1000}.dark .nav-dropdown-menu{background:#141414f2}.nav-dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown-menu li{margin:0}.nav-dropdown-item{display:block;padding:var(--spacing-2) var(--spacing-4);color:var(--text-color-primary);text-decoration:none;border-radius:var(--radius-sm);transition:all var(--transition-fast);font-family:var(--font-family-primary);font-weight:var(--font-weight-normal);font-size:var(--font-size-base)}.nav-dropdown-item:hover{background:#ff99001a;color:var(--accent-color);text-decoration:none}.nav-dropdown-item.active{background:#ff990026;color:var(--accent-color);font-weight:var(--font-weight-medium)}.burger-menu-toggle{display:none;flex-direction:column;justify-content:space-around;width:32px;height:32px;background:transparent;border:none;cursor:pointer;padding:0;z-index:1001;gap:4px}.burger-line{width:100%;height:3px;background:var(--text-color-primary);border-radius:2px;transition:all var(--transition-base)}.burger-menu-toggle:hover .burger-line{background:var(--accent-color)}.mobile-menu-overlay{position:fixed;inset:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:999;opacity:0;visibility:hidden;transition:all var(--transition-base)}.mobile-menu-overlay.active{opacity:1;visibility:visible}.mobile-menu{position:fixed;top:0;right:-100%;width:80%;max-width:320px;height:100vh;background:var(--header-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-left:1px solid var(--glass-border);box-shadow:-4px 0 24px #00000026;z-index:1000;transition:right var(--transition-base);overflow-y:auto}.mobile-menu.open{right:0}.mobile-menu-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-4);border-bottom:1px solid var(--glass-border)}.mobile-menu-title{font-family:var(--font-family-display);font-weight:var(--font-weight-bold);font-size:var(--font-size-xl);color:var(--text-color-primary);margin:0}.mobile-menu-close{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:transparent;border:none;cursor:pointer;color:var(--text-color-primary);transition:color var(--transition-base);padding:0}.mobile-menu-close:hover{color:var(--accent-color)}.mobile-menu-content{padding:var(--spacing-4);display:flex;flex-direction:column;gap:var(--spacing-2)}.mobile-nav-link{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-3) var(--spacing-4);color:var(--text-color-primary);text-decoration:none;border-radius:var(--radius-sm);transition:all var(--transition-base);font-family:var(--font-family-primary);font-weight:var(--font-weight-medium);font-size:var(--font-size-base)}.mobile-nav-link:hover{background:#ff99001a;color:var(--accent-color);text-decoration:none}.mobile-nav-link.active{background:#ff990026;color:var(--accent-color);font-weight:var(--font-weight-medium)}.mobile-nav-dropdown{display:flex;flex-direction:column}.mobile-nav-dropdown-toggle{cursor:pointer;border:none;background:transparent}.mobile-dropdown-arrow{transition:transform var(--transition-base)}.mobile-nav-dropdown-toggle[aria-expanded=true] .mobile-dropdown-arrow{transform:rotate(180deg)}.mobile-nav-dropdown-menu{list-style:none;padding:0;margin:var(--spacing-2) 0 0 0;max-height:0;overflow:hidden;transition:max-height var(--transition-base)}.mobile-nav-dropdown-menu.show{max-height:500px}.mobile-nav-dropdown-menu li{margin:0}.mobile-nav-dropdown-item{display:block;padding:var(--spacing-2) var(--spacing-4) var(--spacing-2) var(--spacing-8);color:var(--text-color-primary);text-decoration:none;border-radius:var(--radius-sm);transition:all var(--transition-fast);font-family:var(--font-family-primary);font-weight:var(--font-weight-normal);font-size:var(--font-size-base)}.mobile-nav-dropdown-item:hover{background:#ff99001a;color:var(--accent-color);text-decoration:none}.mobile-nav-dropdown-item.active{background:#ff990026;color:var(--accent-color);font-weight:var(--font-weight-medium)}.app-main{min-height:calc(100vh - 200px);padding:var(--spacing-8) 0;position:relative;z-index:1}.app-footer{background:var(--footer-bg);border-top:1px solid var(--footer-border);padding:var(--spacing-4) 0;margin-top:var(--spacing-8)}.footer-copyright{text-align:center;font-family:var(--font-family-primary);font-weight:var(--font-weight-normal);font-size:var(--font-size-xs);color:var(--footer-copyright-color);transition:color var(--transition-base)}.page-content{max-width:900px;margin:0 auto;padding:var(--spacing-6) var(--spacing-4)}.page-title{font-family:var(--font-family-display);font-weight:var(--font-weight-bold);font-size:var(--font-size-3xl);color:var(--text-color-primary);text-align:center;margin-bottom:var(--spacing-6);transition:color .3s}.content-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:var(--spacing-6);box-shadow:var(--shadow-md);margin-bottom:var(--spacing-6)}.content-text{font-size:var(--font-size-base);line-height:var(--line-height-loose);color:var(--text-color-primary);margin-bottom:var(--spacing-4);transition:color .3s}.intro-text{color:var(--text-color-primary);transition:color .3s}.feature-icon{color:var(--accent-color);filter:none}.content-list{margin:var(--spacing-4) 0;padding-left:var(--spacing-6);color:var(--text-color-primary);line-height:var(--line-height-loose)}.content-list li{margin-bottom:var(--spacing-2)}.section-title{font-family:var(--font-family-display);font-weight:var(--font-weight-bold);font-size:var(--font-size-2xl);color:var(--text-color-primary);margin:var(--spacing-6) 0 var(--spacing-4) 0;text-align:center;transition:color .3s}.section-divider{margin:var(--spacing-6) 0;border-color:var(--glass-border)}@media(max-width:768px){.app-header{padding:var(--spacing-4) 0;min-height:auto}.header-content{flex-direction:row;gap:var(--spacing-3);align-items:center}.logo{font-size:var(--font-size-2xl)}.slogan{font-size:var(--font-size-sm)}.header-right{width:auto;justify-content:flex-end;gap:var(--spacing-2)}.header-nav{display:none}.burger-menu-toggle{display:flex}.theme-switcher{margin-left:0}.page-title{font-size:var(--font-size-2xl)}}