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(max-width:767px){.stats-grid{gap:var(--space-3);grid-template-columns:repeat(2,1fr)}.stat-item{padding:var(--space-4)var(--space-3)}.stat-number{font-size:18px}}.path-grid{gap:var(--space-4);grid-template-columns:repeat(4,1fr);display:grid}.path-step{text-align:center;padding:var(--space-6)var(--space-4);position:relative}.path-number{background:var(--text-strong);color:#fff;width:40px;height:40px;font-size:var(--text-lg);margin-bottom:var(--space-4);border-radius:50%;justify-content:center;align-items:center;font-weight:600;display:inline-flex}.path-title{font-size:var(--text-base);color:var(--text-strong);margin-bottom:var(--space-2);font-weight:600}.path-desc{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.7}.path-step:not(:last-child):after{content:"";width:calc(var(--space-4));background:linear-gradient(90deg,var(--border),var(--text-tertiary),var(--border));height:1px;position:absolute;top:38px;right:-2px}@media (max-width:1023px){.path-grid{gap:var(--space-3);grid-template-columns:repeat(2,1fr)}.path-step:after{display:none}}@media (max-width:479px){.path-grid{grid-template-columns:1fr}.path-step{text-align:left;gap:var(--space-4);padding:var(--space-4);align-items:flex-start;display:flex}.path-number{flex-shrink:0;margin-bottom:0}.path-step>div:last-child{flex:1}}.contact-section{padding:var(--space-12)0}.contact-grid{gap:var(--space-4);grid-template-columns:repeat(3,1fr);display:grid}.contact-card{text-align:center;padding:var(--space-8)var(--space-6);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-lg);background:#fff9;border:1px solid #ffffff80;flex-direction:column;align-items:center;transition:transform .3s,box-shadow .3s,border-color .3s;display:flex}.contact-card:hover{border-color:#b83d5e26;transform:translateY(-4px);box-shadow:0 12px 32px #0000000f}.contact-card svg{color:var(--accent);margin-bottom:var(--space-4)}.contact-card h3{font-size:var(--text-base);color:var(--text-strong);margin-bottom:var(--space-2);font-weight:600}.contact-card p{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.6}@media (max-width:767px){.contact-grid{gap:var(--space-3);grid-template-columns:1fr}.contact-card{padding:var(--space-6)var(--space-4)}.contact-section{padding:var(--space-8)0}}.contact-channels{gap:var(--space-6);grid-template-columns:repeat(3,1fr);display:grid}.contact-channel-card{padding:var(--space-8)var(--space-6)var(--space-6);border-radius:var(--radius-lg);background:var(--surface-primary);border:1px solid var(--border);flex-direction:column;align-items:center;transition:transform .3s,box-shadow .3s,border-color .3s;display:flex;position:relative;overflow:hidden}.contact-channel-card:before{content:"";border-radius:var(--radius-lg)var(--radius-lg)0 0;opacity:.85;height:3px;transition:opacity .3s;position:absolute;top:0;left:0;right:0}.contact-channel-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000000f,0 2px 8px #0000000a}.contact-channel-card:hover:before{opacity:1}.contact-channel-card[data-brand=wechat]:before{background:linear-gradient(90deg,#07c160,#2aae67)}.contact-channel-card[data-brand=gongzhonghao]:before{background:linear-gradient(90deg,#576b95,#7b8db5)}.contact-channel-card[data-brand=xiaohongshu]:before{background:linear-gradient(90deg,#fe2c55,#ff6480)}.contact-channel-icon{width:40px;height:40px;margin-bottom:var(--space-3);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.contact-channel-icon[data-brand=wechat]{color:#07c160;background:#07c1601a}.contact-channel-icon[data-brand=gongzhonghao]{color:#576b95;background:#576b951a}.contact-channel-icon[data-brand=xiaohongshu]{color:#fe2c55;background:#fe2c551a}.contact-channel-name{font-size:var(--text-base);color:var(--text-strong);margin-bottom:var(--space-1);text-align:center;font-weight:600}.contact-channel-desc{font-size:var(--text-xs);color:var(--text-tertiary);margin-bottom:var(--space-4);text-align:center;line-height:1.5}.contact-channel-qr-wrap{border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:#fff;flex-shrink:0;width:140px;height:140px;transition:transform .3s;overflow:hidden}.contact-channel-card:hover .contact-channel-qr-wrap{transform:scale(1.03)}.contact-channel-hint{color:var(--text-tertiary);margin-top:var(--space-3);text-align:center;letter-spacing:.02em;font-size:11px}.contact-github-link{align-items:center;gap:var(--space-3);padding:var(--space-4)var(--space-6);font-size:var(--text-sm);color:var(--text-body);border:1px solid var(--border);border-radius:var(--radius-md);text-decoration:none;transition:border-color .2s,color .2s,background .2s;display:flex}.contact-github-link:hover{border-color:var(--text-secondary);color:var(--text-strong);background:var(--accent-subtle)}@media (max-width:767px){.contact-channels{gap:var(--space-6);grid-template-columns:1fr;max-width:280px;margin:0 auto}.contact-channel-card{padding:var(--space-6)var(--space-4)var(--space-4)}.contact-channel-qr-wrap{width:120px;height:120px}}@media (min-width:768px) and (max-width:1023px){.contact-channels{gap:var(--space-4)}.contact-channel-card{padding:var(--space-6)var(--space-4)var(--space-4)}.contact-channel-qr-wrap{width:120px;height:120px}}.wechat-overlay{z-index:200;-webkit-backdrop-filter:blur(6px);background:#00000073;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.wechat-modal{border-radius:var(--radius-md);padding:var(--space-8);background:#fff;width:90%;max-width:340px;animation:.25s scaleIn;position:relative;box-shadow:0 20px 60px #00000026}.wechat-close{top:var(--space-3);right:var(--space-3);cursor:pointer;color:var(--text-tertiary);padding:var(--space-1);background:0 0;border:none;border-radius:50%;transition:color .2s,background .2s;position:absolute}.wechat-close:hover{color:var(--text-strong);background:#0000000d}.wechat-qr-container{padding:var(--space-3);border-radius:var(--radius-sm);background:#fafafa;justify-content:center;display:flex}@keyframes scaleIn{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.qr-lightbox-trigger{cursor:pointer;background:0 0;border:none;width:100%;height:100%;margin:0;padding:0;transition:transform .2s;display:block}.qr-lightbox-trigger:hover{transform:scale(1.03)}.qr-lightbox-overlay{z-index:200;-webkit-backdrop-filter:blur(6px);background:#00000073;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.qr-lightbox-content{border-radius:var(--radius-md);padding:var(--space-6);background:#fff;width:90%;max-width:360px;animation:.25s scaleIn;position:relative;box-shadow:0 20px 60px #00000026}.qr-lightbox-close{top:var(--space-2);right:var(--space-2);cursor:pointer;color:var(--text-tertiary);padding:var(--space-1);background:0 0;border:none;border-radius:50%;transition:color .2s,background .2s;position:absolute}.qr-lightbox-close:hover{color:var(--text-strong);background:#0000000d}.auth-wrapper{min-height:100vh;padding:var(--space-6);justify-content:center;align-items:center;padding-top:80px;display:flex}.auth-card{-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:400px;padding:var(--space-8);background:#ffffffd9}.auth-title{font-family:Noto Serif SC,serif;font-size:var(--text-xl);color:var(--text-strong);text-align:center;margin-bottom:var(--space-2);font-weight:700}.auth-subtitle{font-size:var(--text-sm);color:var(--text-secondary);text-align:center;margin-bottom:var(--space-8)}.public-form-group{margin-bottom:var(--space-4)}.public-form-label{font-size:var(--text-sm);color:var(--text-primary);margin-bottom:var(--space-1);font-weight:500;display:block}.public-form-input{width:100%;padding:var(--space-2)var(--space-3);font-size:var(--text-base);color:var(--text-body);background:var(--surface-primary);border:1px solid var(--border);border-radius:var(--radius-sm);outline:none;font-family:inherit;line-height:1.6;transition:border-color .3s}.public-form-input:focus{border-color:var(--text-secondary)}.public-form-input::placeholder{color:var(--text-tertiary)}.public-form-error{font-size:var(--text-xs);color:#c44569;margin-top:var(--space-2)}.public-form-success{font-size:var(--text-xs);color:#27ae60;margin-top:var(--space-2)}.public-btn{justify-content:center;align-items:center;gap:var(--space-2);padding:var(--space-2)var(--space-4);font-size:var(--text-sm);border-radius:var(--radius-sm);cursor:pointer;border:none;font-family:inherit;font-weight:500;line-height:1.5;transition:background .3s,opacity .3s;display:inline-flex}.public-btn:disabled{opacity:.5;cursor:not-allowed}.public-btn-primary{background:var(--btn-primary-bg);color:var(--btn-primary-text)}.public-btn-primary:hover:not(:disabled){background:var(--btn-primary-bg-hover)}.public-btn-full{width:100%}.course-overview-layout{gap:var(--space-8);grid-template-columns:1fr 340px;align-items:start;display:grid}@media (max-width:900px){.course-overview-layout{grid-template-columns:1fr}}.course-overview-toc{min-width:0}.course-overview-sidebar{scrollbar-width:thin;scrollbar-color:var(--border)transparent;max-height:calc(100vh - 100px);position:sticky;top:80px;overflow-y:auto}@media (max-width:900px){.course-overview-sidebar{order:-1;position:static}}.course-sidebar-card{-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-6);background:#ffffffd9}.course-price{font-size:var(--text-xl);color:var(--accent);margin-bottom:var(--space-4);font-weight:700}.course-price-free{color:#27ae60}.section-status-icon{flex-shrink:0;justify-content:center;align-items:center;width:16px;height:16px;font-size:11px;display:inline-flex}.section-status-free{color:#27ae60}.section-status-locked{color:var(--text-tertiary)}.section-status-unlocked{color:var(--accent)}.paywall{text-align:center;padding:var(--space-12)var(--space-6);border:1px solid var(--border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(16px);background:#ffffffd9}.paywall-icon{margin-bottom:var(--space-4);font-size:48px}.paywall-title{font-size:var(--text-lg);color:var(--text-strong);margin-bottom:var(--space-2);font-weight:600}.paywall-desc{font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-6);line-height:1.7}.paywall-actions{align-items:center;gap:var(--space-4);flex-direction:column;max-width:320px;margin:0 auto;display:flex}.paywall-code-form{gap:var(--space-2);width:100%;display:flex}.paywall-code-input{padding:var(--space-2)var(--space-3);font-size:var(--text-sm);color:var(--text-body);background:var(--surface-primary);border:1px solid var(--border);border-radius:var(--radius-sm);outline:none;flex:1;font-family:inherit;transition:border-color .3s}.paywall-code-input:focus{border-color:var(--text-secondary)}.paywall-code-btn{padding:var(--space-2)var(--space-4);font-size:var(--text-sm);background:var(--btn-primary-bg);color:var(--btn-primary-text);border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;border:none;font-weight:500;transition:background .3s}.paywall-code-btn:hover:not(:disabled){background:var(--btn-primary-bg-hover)}.paywall-code-btn:disabled{opacity:.5;cursor:not-allowed}.paywall-divider{align-items:center;gap:var(--space-3);width:100%;color:var(--text-tertiary);font-size:var(--text-xs);display:flex}.paywall-divider:before,.paywall-divider:after{content:"";background:var(--border);flex:1;height:1px}.paywall-link{font-size:var(--text-sm);color:var(--accent);transition:opacity .2s}.paywall-link:hover{opacity:.8}.dual-pricing{gap:var(--space-3);margin-bottom:var(--space-6);flex-direction:column;display:flex}.pricing-tier{padding:var(--space-4)var(--space-4)var(--space-3);border:1.5px solid var(--border);border-radius:var(--radius-md);background:#b83d5e05;transition:border-color .2s,box-shadow .2s;position:relative}.pricing-tier:hover{border-color:#b83d5e33;box-shadow:0 2px 12px #b83d5e0f}.pricing-tier-name{font-size:var(--text-xs);color:var(--text-secondary);letter-spacing:.03em;margin-bottom:var(--space-2);font-weight:500}.pricing-tier-price{color:var(--accent);margin-bottom:var(--space-1);font-size:28px;font-weight:700;line-height:1.2}.pricing-tier-price .price-symbol{vertical-align:top;margin-right:2px;font-size:16px;font-weight:500;position:relative;top:4px}.pricing-tier-desc{font-size:var(--text-xs);color:var(--text-tertiary);line-height:1.6}.unlock-flow{align-items:flex-start;gap:var(--space-2);padding:var(--space-3)var(--space-4);background:var(--surface-secondary);border-radius:var(--radius-sm);margin-bottom:var(--space-4);display:flex}.unlock-flow-step{text-align:center;flex-direction:column;flex:1;align-items:center;gap:3px;min-width:0;display:flex}.unlock-flow-icon{font-size:18px;line-height:1}.unlock-flow-label{color:var(--text-secondary);word-break:keep-all;font-size:11px;line-height:1.4}.unlock-flow-link{color:var(--accent);text-underline-offset:2px;text-decoration:underline}.unlock-flow-arrow{color:var(--text-tertiary);flex-shrink:0;margin-top:2px;font-size:16px;line-height:1}.paywall-dual-pricing{gap:var(--space-3);text-align:left;width:100%;margin-bottom:var(--space-4);flex-direction:column;display:flex}.paywall-pricing-tier{padding:var(--space-3)var(--space-4);border:1.5px solid var(--border);border-radius:var(--radius-md)}.paywall-pricing-tier--recommended{border-color:var(--accent);background:#b83d5e08}.paywall-pricing-tier-header{margin-bottom:var(--space-1);justify-content:space-between;align-items:baseline;display:flex}.paywall-pricing-tier-name{font-size:var(--text-sm);color:var(--text-primary);font-weight:600}.paywall-pricing-tier-price{font-size:var(--text-lg);color:var(--accent);font-weight:700}.paywall-pricing-tier-desc{font-size:var(--text-xs);color:var(--text-secondary)}.user-menu{align-items:center;display:inline-flex;position:relative}.user-menu-trigger{align-items:center;gap:var(--space-2);padding:var(--space-1)var(--space-3);font-size:var(--text-sm);color:var(--text-primary);border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:99px;font-family:inherit;transition:border-color .3s;display:inline-flex}.user-menu-trigger:hover{border-color:var(--text-secondary)}.user-menu-dropdown{background:var(--surface-primary);border:1px solid var(--border);border-radius:var(--radius-md);min-width:160px;box-shadow:var(--shadow-card);padding:var(--space-2);z-index:100;animation:.15s scaleIn;position:absolute;top:calc(100% + 8px);right:0}.user-menu-item{width:100%;padding:var(--space-2)var(--space-3);font-size:var(--text-sm);color:var(--text-body);border-radius:var(--radius-sm);cursor:pointer;text-align:left;background:0 0;border:none;font-family:inherit;transition:background .15s;display:block}.user-menu-item:hover{background:var(--accent-subtle)}.user-menu-divider{background:var(--border);height:1px;margin:var(--space-1)0}.code-block-wrapper{margin:var(--space-6)0;border-radius:var(--radius-md);border:1px solid var(--border);overflow:hidden}.code-block-header{padding:var(--space-2)var(--space-4);background:#1e1e1e;border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;display:flex}.code-block-language{font-size:var(--text-xs);color:#858585;text-transform:uppercase;letter-spacing:.05em;font-weight:600}.code-block-copy-btn{align-items:center;gap:var(--space-1);padding:4px var(--space-2);font-size:var(--text-xs);color:#858585;cursor:pointer;background:0 0;border:1px solid #ffffff1a;border-radius:4px;font-family:inherit;transition:all .2s;display:flex}.code-block-copy-btn:hover{color:#fff;background:#ffffff0d;border-color:#ffffff4d}.code-block-copy-btn svg{flex-shrink:0}.inline-code{color:var(--accent);background:#b83d5e14;border-radius:4px;padding:2px 6px;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9em}.code-block-fallback{margin:var(--space-6)0;padding:var(--space-4);color:#d4d4d4;border-radius:var(--radius-md);background:#1e1e1e;font-family:Consolas,Monaco,Courier New,monospace;font-size:14px;line-height:1.5;overflow-x:auto}.code-block-fallback code{color:inherit;background:0 0;padding:0}.custom-box{margin:var(--space-6)0;padding:var(--space-4);border-radius:var(--radius-md);border-left:4px solid}.custom-box-content{font-size:var(--text-base);line-height:1.7}.custom-box-content>:first-child{margin-top:0}.custom-box-content>:last-child{margin-bottom:0}.prompt-template-box{background:linear-gradient(135deg,#e8f5e9 0%,#f1f8e9 100%);border-left-color:#4caf50}.prompt-template-box .custom-box-content strong:first-child{color:#2e7d32;font-size:var(--text-lg)}.practice-box{background:linear-gradient(135deg,#e3f2fd 0%,#e1f5fe 100%);border-left-color:#2196f3}.practice-box .custom-box-content strong:first-child{color:#1565c0;font-size:var(--text-lg)}.warning-box{background:linear-gradient(135deg,#fff3e0 0%,#ffe0b2 100%);border-left-color:#ff9800}.warning-box .custom-box-content strong:first-child{color:#e65100;font-size:var(--text-lg)}.case-box{background:linear-gradient(135deg,#f3e5f5 0%,#e1bee7 100%);border-left-color:#9c27b0}.case-box .custom-box-content strong:first-child{color:#6a1b9a;font-size:var(--text-lg)}.theory-box{background:linear-gradient(135deg,#e8eaf6 0%,#c5cae9 100%);border-left-color:#3f51b5}.theory-box .custom-box-content strong:first-child{color:#283593;font-size:var(--text-lg)}.insight-box{background:linear-gradient(135deg,#fce4ec 0%,#f8bbd0 100%);border-left-color:#e91e63}.insight-box .custom-box-content strong:first-child{color:#880e4f;font-size:var(--text-lg)}.default-blockquote{margin:var(--space-6)0;padding:var(--space-4);padding-left:var(--space-6);border-left:4px solid var(--border);background:var(--surface-secondary);color:var(--text-secondary);font-style:italic}.comparison-container{gap:var(--space-4);margin:var(--space-6)0;grid-template-columns:1fr 1fr;display:grid}@media (max-width:767px){.comparison-container{grid-template-columns:1fr}}.comparison-side{padding:var(--space-4);border-radius:var(--radius-md);border:2px solid}.comparison-before{background:#fff5f5;border-color:#ef5350}.comparison-after{background:#f1f8e9;border-color:#66bb6a}.comparison-label{font-size:var(--text-sm);margin-bottom:var(--space-2);font-weight:700}.comparison-before .comparison-label{color:#c62828}.comparison-after .comparison-label{color:#2e7d32}.comparison-content{font-size:var(--text-base);color:var(--text-body);line-height:1.7}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}