:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #dbeafe;--color-text: #1e293b;--color-text-muted: #64748b;--color-bg: #ffffff;--color-bg-alt: #f8fafc;--color-border: #e2e8f0;--color-success: #16a34a;--color-error: #dc2626;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 4px 16px rgba(15, 23, 42, .08);--shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);--radius: 12px;--radius-sm: 8px;--header-h: 64px;--container: 1120px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.6;color:var(--color-text);background:var(--color-bg)}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-dark)}.container{max-width:var(--container);margin:0 auto;padding:0 24px}.header{position:sticky;top:0;z-index:100;height:var(--header-h);background:#ffffffeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border)}.nav{display:flex;align-items:center;height:var(--header-h);gap:32px}.logo{display:inline-flex;align-items:center}.logo-brand{display:block;height:36px;width:auto}.nav-links{display:flex;gap:28px;flex:1}.nav-links a{color:var(--color-text-muted);font-size:.95rem;font-weight:500;transition:color .15s}.nav-links a:hover{color:var(--color-primary)}.nav-cta{margin-left:auto}.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:0;border:none;background:transparent;cursor:pointer}.nav-toggle span{display:block;width:22px;height:2px;background:var(--color-text);border-radius:1px;transition:transform .2s,opacity .2s}.btn{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;border:2px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,transform .1s;text-align:center}.btn:active{transform:scale(.98)}.btn-sm{padding:8px 16px;font-size:.875rem}.btn-lg{padding:14px 28px;font-size:1rem}.btn-primary{background:var(--color-primary);color:#fff!important;border-color:var(--color-primary)}.btn-primary:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark);color:#fff!important}.btn-secondary{background:#475569;color:#fff!important;border-color:#475569}.btn-secondary:hover{background:#334155;color:#fff!important}.btn-outline{background:transparent;color:var(--color-primary)!important;border-color:var(--color-primary)}.btn-outline:hover{background:var(--color-primary-light)}.btn-label{line-height:1.3}.btn-hint{font-size:.75rem;font-weight:400;opacity:.85}.hero{padding:72px 0 88px;background:linear-gradient(160deg,#eff6ff,#f8fafc 45%,#fff);overflow:hidden}.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}.hero-badge{display:inline-block;margin:0 0 16px;padding:6px 14px;background:var(--color-primary-light);color:var(--color-primary);font-size:.85rem;font-weight:600;border-radius:999px}.hero h1{margin:0 0 20px;font-size:clamp(2rem,4.5vw,2.75rem);line-height:1.2;letter-spacing:-.03em;color:var(--color-text)}.hero-desc{margin:0 0 32px;font-size:1.1rem;color:var(--color-text-muted);max-width:520px}.hero-actions{display:flex;flex-wrap:wrap;gap:14px}.hero-actions .btn{flex-direction:row}.mockup{border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden;border:1px solid var(--color-border);background:#fff}.mockup-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#f1f5f9;border-bottom:1px solid var(--color-border)}.mockup-bar .dot{width:10px;height:10px;border-radius:50%;background:#cbd5e1}.mockup-bar .dot:nth-child(1){background:#f87171}.mockup-bar .dot:nth-child(2){background:#fbbf24}.mockup-bar .dot:nth-child(3){background:#4ade80}.mockup-title{margin-left:8px;font-size:.8rem;color:var(--color-text-muted)}.mockup-body{padding:0}.mockup-menu{padding:8px 16px;font-size:.75rem;color:var(--color-text-muted);border-bottom:1px solid var(--color-border);background:#fafbfc}.mockup-toolbar{height:36px;background:linear-gradient(90deg,#e2e8f0,#f1f5f9,#e2e8f0);border-bottom:1px solid var(--color-border)}.mockup-sheet{height:220px;padding:16px;background:#fff}.mockup-grid{width:100%;height:100%;background-image:linear-gradient(#e2e8f0 1px,transparent 1px),linear-gradient(90deg,#e2e8f0 1px,transparent 1px);background-size:48px 28px;border:1px solid #cbd5e1;border-radius:4px}.mockup-tabs{padding:8px 16px;font-size:.75rem;color:var(--color-text-muted);border-top:1px solid var(--color-border);background:#f8fafc}.section{padding:80px 0}.section-alt{background:var(--color-bg-alt)}.section-head{text-align:center;max-width:640px;margin:0 auto 48px}.section-head h2{margin:0 0 12px;font-size:2rem;letter-spacing:-.02em}.section-head p{margin:0;color:var(--color-text-muted);font-size:1.05rem}.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.feature-item{padding:28px;background:#fff;border-radius:var(--radius);border:1px solid var(--color-border);box-shadow:var(--shadow-sm);transition:box-shadow .2s,transform .2s}.feature-item:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.feature-icon{font-size:1.75rem;margin-bottom:12px}.feature-item h3{margin:0 0 10px;font-size:1.1rem}.feature-item p{margin:0;font-size:.925rem;color:var(--color-text-muted);line-height:1.65}.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.card{padding:24px;background:#fff;border-radius:var(--radius);border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.card h3{margin:0 0 10px;font-size:1rem;color:var(--color-primary)}.card p{margin:0;font-size:.875rem;color:var(--color-text-muted);line-height:1.6}.demo-cta-box{text-align:center;padding:48px 32px;background:linear-gradient(135deg,var(--color-primary) 0%,#1e40af 100%);border-radius:var(--radius);color:#fff;box-shadow:var(--shadow-lg)}.demo-cta-box h2{margin:0 0 12px;font-size:1.75rem}.demo-cta-box p{margin:0 0 24px;opacity:.92}.demo-cta-box .btn-primary{background:#fff;color:var(--color-primary)!important;border-color:#fff}.demo-cta-box .btn-primary:hover{background:#f1f5f9}.app-root--standalone{min-height:100vh;background:#0b1220}.demo-shell{display:flex;flex-direction:column;height:100vh;min-height:100vh;background:radial-gradient(1200px 500px at 10% -10%,rgba(37,99,235,.28),transparent 55%),radial-gradient(900px 400px at 90% 0%,rgba(14,165,233,.16),transparent 50%),#0b1220;color:#e2e8f0}.demo-shell-bar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 16px;background:#0f172ae0;border-bottom:1px solid rgba(148,163,184,.18);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.demo-shell-brand{display:flex;align-items:center;gap:10px;min-width:0}.demo-shell-icon{display:block;border-radius:8px;box-shadow:0 0 0 1px #ffffff14}.demo-shell-titles{display:flex;flex-direction:column;line-height:1.2}.demo-shell-name{font-weight:700;font-size:.95rem;color:#fff}.demo-shell-sub{font-size:.75rem;color:#94a3b8}.demo-shell-actions{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}.demo-icon-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(148,163,184,.28);background:#1e293bb3;color:#e2e8f0!important;font:inherit;font-size:.82rem;padding:7px 10px;border-radius:9px;cursor:pointer;text-decoration:none}.demo-icon-btn:hover{background:#334155f2;border-color:#94a3b873;color:#fff!important}.demo-icon-btn--primary{background:#2563eb;border-color:#3b82f6;color:#fff!important}.demo-icon-btn--primary:hover{background:#1d4ed8}.demo-icon-btn--ghost{border-color:transparent;background:transparent;padding:6px}.demo-shell-body{flex:1;min-height:0;display:grid;grid-template-columns:260px minmax(0,1fr);gap:0}.demo-shell .demo-tree{display:flex;flex-direction:column;min-height:0;overflow:auto;background:#0f172aeb;border-right:1px solid rgba(148,163,184,.16);padding:14px 10px}.demo-tree-title{display:flex;align-items:center;gap:8px;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:#94a3b8;margin:0 8px 12px}.demo-cat{margin-bottom:4px}.demo-cat-btn{width:100%;display:flex;align-items:center;gap:6px;border:0;background:transparent;color:#cbd5e1;font:inherit;font-weight:600;font-size:.88rem;padding:8px 10px;border-radius:8px;cursor:pointer;text-align:left}.demo-cat-btn:hover{background:#94a3b81f;color:#fff}.demo-cat-caret{display:inline-block;transition:transform .15s ease;color:#64748b;width:12px}.demo-cat-caret.open{transform:rotate(90deg)}.demo-cat-icon{display:inline-flex;color:#60a5fa}.demo-tree-list{list-style:none;margin:0 0 4px;padding:0 0 0 10px}.demo-tree-item{width:100%;display:flex;align-items:center;gap:8px;border:0;background:transparent;color:#94a3b8;font:inherit;font-size:.9rem;padding:8px 10px;border-radius:8px;cursor:pointer;text-align:left}.demo-tree-dot{width:6px;height:6px;border-radius:50%;background:#475569;flex:0 0 auto}.demo-tree-item:hover{background:#3b82f626;color:#fff}.demo-tree-item:hover .demo-tree-dot{background:#93c5fd}.demo-tree-item.active{background:#2563eb;color:#fff}.demo-tree-item.active .demo-tree-dot{background:#fff}.demo-shell .demo-main{display:flex;flex-direction:column;min-width:0;min-height:0;background:#e8eef7}.demo-shell .demo-meta{flex:0 0 auto;padding:14px 18px 10px;border-bottom:1px solid #d5deea;background:#fffffff5}.demo-shell .demo-meta.collapsed{padding-bottom:10px}.demo-meta-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.demo-meta-heading h1{margin:0 0 8px;font-size:1.2rem;color:#0f172a}.demo-meta-body{margin-top:4px}.demo-desc{margin:0 0 8px;color:#64748b;line-height:1.55;font-size:.92rem}.demo-features{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0}.demo-features li{font-size:.75rem;padding:3px 9px;border-radius:999px;background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe}.demo-tips{display:flex;align-items:flex-start;gap:6px;margin:0 0 8px;font-size:.86rem;color:#334155}.demo-tips svg{flex:0 0 auto;margin-top:2px;color:#2563eb}.demo-file{display:flex;flex-wrap:wrap;gap:10px 16px;margin:0;font-size:.8rem;color:#64748b}.demo-file code{font-size:.78rem;background:#f1f5f9;padding:2px 6px;border-radius:4px;color:#0f172a}.demo-shell .demo-frame-wrap{flex:1;min-height:0;padding:0;position:relative;overflow:hidden;background:#fff}.demo-shell .demo-frame{position:absolute;top:0;right:0;bottom:0;left:0;display:block;width:100%;height:100%;border:0;border-radius:0;background:#fff;box-shadow:none}.contact-box{text-align:center;max-width:560px;margin:0 auto}.contact-box h2{margin:0 0 12px;font-size:2rem}.contact-box>p{margin:0 0 32px;color:var(--color-text-muted)}.contact-items{display:flex;justify-content:center;gap:48px;flex-wrap:wrap}.contact-item{display:flex;flex-direction:column;gap:6px}.contact-label{font-size:.85rem;color:var(--color-text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.contact-value{font-size:1.35rem;font-weight:700;color:var(--color-primary)}.footer{padding:32px 0;background:#0f172a;color:#94a3b8}.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}.footer-brand{display:inline-flex;align-items:center;gap:10px}.footer-logo-icon{display:block;flex-shrink:0}.footer-logo{font-weight:700;color:#fff}.footer-meta{display:flex;flex-direction:column;align-items:flex-end;gap:6px}.footer-icp{color:#94a3b8;font-size:.875rem}.footer-icp:hover{color:#cbd5e1}.footer-beian{display:inline-flex;align-items:center;gap:6px;color:#94a3b8;font-size:.875rem}.footer-beian:hover{color:#cbd5e1}.footer-beian-icon{display:block;flex-shrink:0}@media (max-width: 1024px){.card-grid,.feature-list{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.nav-toggle{display:flex;margin-left:auto}.nav-links{display:none;position:absolute;top:var(--header-h);left:0;right:0;flex-direction:column;gap:0;padding:12px 24px 20px;background:#fff;border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-md)}.nav-links.open{display:flex}.nav-links a{padding:12px 0;border-bottom:1px solid var(--color-border)}.nav-links a:last-child{border-bottom:none}.nav-cta{display:none}.header .nav{position:relative;flex-wrap:wrap}.hero-inner{grid-template-columns:1fr;text-align:center}.hero-desc{margin-left:auto;margin-right:auto}.hero-actions{justify-content:center}.hero-visual{order:-1}.feature-list,.card-grid{grid-template-columns:1fr}.demo-shell-body{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr)}.demo-shell .demo-tree{max-height:220px;border-right:0;border-bottom:1px solid rgba(148,163,184,.16)}.demo-shell-actions .demo-icon-btn span{display:none}.demo-shell .demo-frame-wrap{min-height:50vh}.footer-inner{flex-direction:column;text-align:center}.footer-meta{align-items:center}}.guestbook-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}.guestbook-form label{display:block;margin-bottom:14px}.guestbook-form label span{display:block;font-size:.875rem;color:var(--color-text-muted);margin-bottom:6px}.guestbook-form input,.guestbook-form textarea{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font:inherit}.guestbook-list h3{margin-top:0}.guestbook-item{padding:14px 0;border-bottom:1px solid var(--color-border);list-style:none}.guestbook-meta{display:flex;justify-content:space-between;gap:12px;font-size:.875rem;color:var(--color-text-muted);margin-bottom:6px}.guestbook-empty{color:var(--color-text-muted)}.form-msg{margin-top:12px;font-size:.9rem}.form-msg.success{color:var(--color-success)}.form-msg.error{color:var(--color-error)}.faq-list{text-align:left;max-width:36rem;margin:0 auto}.detail-chapter-body{max-width:52rem;margin:0 auto}.detail-lead{margin:0 0 28px;font-size:1.08rem;line-height:1.8;color:var(--color-text)}.detail-section{margin-bottom:28px}.detail-section h3{margin:0 0 10px;font-size:1.15rem;color:var(--color-text)}.detail-section p{margin:0;font-size:.98rem;line-height:1.75;color:var(--color-text-muted)}.detail-section code{font-size:.88em;padding:2px 6px;background:var(--color-bg-alt);border-radius:4px}.detail-points{margin:32px 0 0;padding:20px 24px 20px 2.5rem;background:var(--color-bg-alt);border-radius:var(--radius-sm);border-left:4px solid var(--color-primary);list-style:disc;color:var(--color-text-muted);line-height:1.7}.section-alt .detail-points{background:#fff}.admin-page{padding-top:24px}.admin-container{max-width:960px}.admin-login{max-width:320px;display:flex;flex-direction:column;gap:12px}.admin-login input{padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm)}.admin-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.admin-tabs button{margin-right:8px;padding:8px 16px;border:1px solid var(--color-border);background:#fff;border-radius:var(--radius-sm);cursor:pointer}.admin-tabs button.active{background:var(--color-primary-light);border-color:var(--color-primary);color:var(--color-primary-dark)}.admin-filters{display:flex;gap:12px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.admin-summary{color:var(--color-text-muted);margin-bottom:16px}.admin-panels{display:grid;gap:20px}.admin-panel{background:var(--color-bg-alt);border-radius:var(--radius);padding:16px;overflow-x:auto}.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}.admin-table th,.admin-table td{border-bottom:1px solid var(--color-border);padding:8px 10px;text-align:left}.admin-pending{list-style:none;padding:0}.admin-pending li{background:var(--color-bg-alt);border-radius:var(--radius-sm);padding:14px;margin-bottom:12px}.admin-panel-wide{margin-top:20px}.admin-table-wrap{overflow-x:auto}.admin-table-details{font-size:.85rem}.admin-table-details td,.admin-table-details th{max-width:200px;word-break:break-all}.cell-nowrap{white-space:nowrap}.admin-pagination{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:.9rem;color:var(--color-text-muted)}@media (max-width: 768px){.guestbook-grid{grid-template-columns:1fr}}