@import "https://fonts.googleapis.com/css2?family=Barlow&family=Barlow+Condensed:wght@400;600&family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=Noto+Sans+SC:wght@100..900&display=swap";@import "https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@200..900&family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Source+Serif+4:ital,opsz,wght@0,8..60,200..900;1,8..60,200..900&display=swap";@font-face{font-family:Musical;src:url(fonts/Musical-Regular.woff2)format("woff2");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Musical;src:url(fonts/Musical-Bold.woff2)format("woff2");font-weight:700;font-style:normal;font-display:swap}@font-face{font-family:Musical;src:url(fonts/Musical-Semibold.woff2)format("woff2");font-weight:600;font-style:normal;font-display:swap}@font-face{font-family:Musical;src:url(fonts/Musical-Light.woff2)format("woff2");font-weight:300;font-style:normal;font-display:swap}@font-face{font-family:Icons;src:url(fonts/Icons-Regular.woff2)format("woff2");font-weight:400;font-style:normal;font-display:auto;font-feature-settings:"liga" 1}:root{--primary-blue:#1e66c6;--bg-light:#f1f5f9;--text-main:#1d1d1f;--text-sub:#6b7280;--navbar-bg:#fffc;--card-bg:#fff;--card-shadow:0 8px 20px -4px #0e34701f, 0 4px 8px -2px #0e347014;--card-hover-shadow:0 12px 30px #0e347033;--item-border:#00000014;--card-radius:12px;--on-primary:#fff;--bilibili-blue:#0cb6f2;--bilibili-pink:#f69;--xhs-red:#ff2442;--youtube-red:#f03;--discord-blurple:#5865f2;--qq-brand:#0052d9;--wechat-green:#07c160;--duolingo-green:#58cc02;--baidu-blue:#2932e1;--weibo-orange:#ff8200;--douyin-bg:#161823;--douyin-text:#f9f9fa}:root[data-theme=dark]{--primary-blue:#93c5fd;--bg-light:#0f172a;--text-main:#f5f5f7;--text-sub:#94a3b8;--navbar-bg:#0f172acc;--card-bg:#1e293b;--card-shadow:0 10px 25px -5px #0006, 0 8px 10px -6px #0000004d;--card-hover-shadow:0 20px 40px -4px #000000b3;--item-border:#ffffff14;--on-primary:#0f172a}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--primary-blue:#93c5fd;--bg-light:#0f172a;--text-main:#f5f5f7;--text-sub:#94a3b8;--navbar-bg:#0f172acc;--card-bg:#1e293b;--card-shadow:0 10px 25px -5px #0006, 0 8px 10px -6px #0000004d;--card-hover-shadow:0 20px 40px -4px #000000b3;--item-border:#ffffff14;--on-primary:#0f172a}}section.container a{font-size:inherit}num{font-variant-numeric:tabular-nums}icons{font-family:Icons;font-weight:400}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;outline:none;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:80px}::-webkit-scrollbar{display:none}*{-ms-overflow-style:none;scrollbar-width:none}button,input,select,textarea{font-family:inherit}body{font-optical-sizing:auto;background-color:var(--bg-light);color:var(--text-main);line-break:strict;font-feature-settings:"liga" 1, "calt" 1, "halt" 1, "chws" 1;user-select:none;font-family:Inter,Noto Sans SC,-apple-system,sans-serif;font-size:1rem;line-height:1.6;transition:background-color .3s,color .3s}.content-section{background-color:var(--bg-light);text-align:center;z-index:2;padding:60px 20px;position:relative}section.container{width:100%;max-width:1200px;margin:0 auto}.section-title{margin-bottom:40px;font-size:1.3rem;font-weight:600;display:inline-block;position:relative}.section-title:after{content:"";background-color:var(--primary-blue);border-radius:3px;width:30px;height:3px;position:absolute;bottom:-8px;left:50%;transform:translate(-50%)}.section-hint{color:var(--text-sub);justify-content:center;margin-top:-25px;margin-bottom:30px;font-size:.85rem;display:flex}.section-content{margin-bottom:70px}.grid{flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;margin-top:10px;display:flex}.grid p{color:var(--text-sub)}.grid h2{color:var(--primary-blue);font-size:1.6rem;font-weight:800}html[lang^=zh] i,html[lang^=zh] em,html[lang^=zh] .italic{-webkit-font-smoothing:antialiased;font-style:normal;font-weight:300}html[lang^=zh] .inter-italic-override{font-family:Inter,sans-serif;font-style:italic}html[lang=en-US] i,html[lang=en-US] em,html[lang=en-US] .italic{font-style:italic}.navbar{background:var(--navbar-bg);-webkit-backdrop-filter:blur(12px);z-index:100;width:100%;height:60px;box-shadow:var(--card-shadow);border-bottom:1px solid var(--item-border);transition:transform .4s cubic-bezier(.165,.84,.44,1),box-shadow .4s;display:flex;position:fixed;top:0;transform:translateY(0)}.nav-container{justify-content:space-between;align-items:center;width:100%;max-width:1200px;margin:0 auto;padding:0 20px;display:flex}.nav-brand{color:var(--text-main);stroke:var(--text-main);stroke-width:4px;stroke-linecap:round;stroke-linejoin:round;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;text-decoration:none;transition:color .2s,font-weight .2s,stroke .2s,stroke-width .2s;display:flex}.nav-brand:hover{color:var(--primary-blue);stroke:var(--primary-blue);stroke-width:6px;font-weight:900}.nav-avatar{object-fit:cover;border:1px solid #0000000d;border-radius:50%;width:32px;height:32px}.nav-links{gap:20px;display:flex}.menu-toggle{color:var(--text-main);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:5px;transition:color .2s;display:none}.menu-toggle.active{color:var(--primary-blue)}.menu-toggle svg{stroke:currentColor;width:24px;height:24px}.nav-links a{color:var(--text-main);flex-direction:column;justify-content:center;align-items:center;font-size:.9rem;font-weight:400;text-decoration:none;transition:color .2s,font-weight .2s;display:inline-flex;position:relative}.nav-links a:before{content:attr(data-text);visibility:hidden;user-select:none;pointer-events:none;height:0;font-weight:700;overflow:hidden}.nav-links a:hover{color:var(--primary-blue);font-weight:700}.nav-dropdown{background:var(--card-bg);opacity:0;visibility:hidden;z-index:101;border-radius:12px;flex-direction:column;min-width:150px;padding:8px;transition:all .5s;display:flex;position:absolute;top:70px;right:20px;transform:translateY(-20px);box-shadow:0 12px 30px -5px #0e347033}.nav-dropdown.active{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown a{color:var(--text-main);border-radius:8px;flex-direction:column;justify-content:center;align-items:flex-start;padding:12px 16px;font-size:1rem;font-weight:400;line-height:.8;text-decoration:none;transition:color .2s,font-weight .2s;display:flex;position:relative}.nav-dropdown a:before{content:attr(data-text);visibility:hidden;user-select:none;pointer-events:none;height:0;font-weight:700;overflow:hidden}.nav-dropdown a:hover{color:var(--primary-blue);font-weight:700}.nav-divider{background:var(--text-sub);opacity:.3;border-radius:3px;align-self:center;width:2px;height:20px;display:inline-block}.dropdown-divider{background:var(--text-sub);opacity:.2;height:1px;margin:8px 16px}.nav-links a.active,.nav-dropdown a.active{color:var(--primary-blue);font-weight:700}.nav-links a.active:before,.nav-dropdown a.active:before{font-weight:700}.modal-overlay{z-index:1000;backdrop-filter:blur(4px);visibility:hidden;opacity:0;background:#00000080;justify-content:center;align-items:center;width:100%;height:100%;transition:all .3s;display:flex;position:fixed;top:0;left:0}.modal-overlay.active{visibility:visible;opacity:1}.modal-modal{background:var(--card-bg);border-radius:var(--card-radius);text-align:center;flex-direction:column;width:90%;max-width:340px;transition:all .4s;display:flex;position:relative;overflow:hidden;transform:translateY(20px)scale(.95);box-shadow:0 25px 50px -12px #02061780}.modal-overlay.active .modal-modal{transform:translateY(0)scale(1)}.modal-body{width:100%;max-height:90vh;padding:30px;overflow-y:auto}.modal-qr{width:220px;max-width:100%;height:auto}@media (width<=480px){.modal-body{padding:25px 20px}}.close-btn{cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;width:32px;height:32px;display:flex;position:absolute;top:10px;right:10px}.close-btn svg{fill:none;stroke:#94a3b8;stroke-width:2.5px;stroke-linecap:round;width:18px;height:18px;transition:stroke .2s}.close-btn:hover svg{stroke:var(--primary-blue)}.modal-btn{background-color:var(--primary-blue);border-radius:8px;margin-top:20px;padding:10px 35px;font-weight:600;text-decoration:none;transition:opacity .2s;display:inline-block;color:var(--on-primary)!important}.modal-btn:hover{opacity:.85}.theme-toggle-btn,.lang-toggle-btn,.back-home-btn{z-index:101;background:var(--card-bg);width:44px;height:44px;color:var(--text-main);-webkit-backdrop-filter:blur(10px);border:1px solid var(--item-border);box-shadow:var(--card-shadow);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;text-decoration:none;transition:all .3s;display:flex;position:fixed;right:25px}.theme-toggle-btn{bottom:25px}.lang-toggle-btn{bottom:80px}.back-home-btn{top:25px;left:20px;right:auto}.milestone-card{border:1px solid var(--item-border)}.theme-toggle-btn svg,.lang-toggle-btn svg,.back-home-btn svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.theme-toggle-btn:hover,.lang-toggle-btn:hover,.back-home-btn:hover{color:var(--primary-blue);transform:scale(1.1);box-shadow:0 8px 20px #0e347033}.mobile-only{display:none!important}@media (width<=768px){.desktop-only{display:none!important}.mobile-only{display:flex!important}}footer{border-top:1px solid var(--item-border);text-align:center;margin-top:80px;padding:60px 0 30px}footer p,a{color:var(--text-sub);margin:4px 0;font-size:.85rem;text-decoration:none;transition:color .2s}footer a:hover{color:var(--primary-blue)}.toast-notice{background:var(--card-bg);color:var(--text-main);border:1px solid var(--primary-blue);z-index:2000;opacity:0;pointer-events:none;white-space:nowrap;border-radius:50px;align-items:center;gap:10px;padding:10px 22px;font-size:.9rem;font-weight:500;transition:all .5s cubic-bezier(.165,.84,.44,1);display:flex;position:fixed;bottom:40px;left:50%;transform:translate(-50%)translateY(100px);box-shadow:0 10px 30px #1e66c626}.toast-notice.show{opacity:1;transform:translate(-50%)translateY(0)}.loading-spinner{border:4px solid #7f7f7f33;border-top-color:var(--primary-blue);border-radius:50%;width:36px;height:36px;margin:20px auto 0;animation:1s linear infinite spinner-spin}@keyframes spinner-spin{to{transform:rotate(360deg)}}.card{background-color:var(--card-bg);box-shadow:var(--card-shadow);color:var(--text-main);border:1px solid var(--item-border);cursor:pointer;border-radius:150px;flex-direction:row;justify-content:center;align-items:center;height:60px;padding:20px;text-decoration:none;transition:transform .3s,translate .3s,background-color .3s,color .3s,box-shadow .3s;display:flex;translate:0}.card-svg{fill:currentColor;width:auto;height:24px;margin-right:6px;padding-top:2px;overflow:visible}.card-subtitle{padding-top:2px;font-size:1.5rem;font-weight:600}.card:hover{background-color:var(--primary-blue);color:var(--on-primary);box-shadow:var(--card-hover-shadow)}.card.bilibili:hover{background-color:var(--bilibili-blue);color:#fff}.card.xhs:hover{background-color:var(--xhs-red);color:#fff}.card.youtube:hover{background-color:var(--youtube-red);color:#fff}.card.discord:hover{background-color:var(--discord-blurple);color:#fff}.card.qq:hover{background-color:var(--qq-brand);color:#fff}.card.wechat:hover{background-color:var(--wechat-green);color:#fff}.card.duolingo:hover{background-color:var(--duolingo-green);color:#fff}.card.baidu:hover{background-color:var(--baidu-blue);color:#fff}.card.wiki:hover{color:#fff;background-color:#000}.card.weibo:hover{background-color:var(--weibo-orange);color:#fff}.card.douyin:hover{background-color:var(--douyin-bg);color:var(--douyin-text)}:root[data-theme=dark]{& .card.wiki:hover{color:#000;background-color:#fff}& .card.douyin:hover{background-color:var(--douyin-text);color:var(--douyin-bg)}}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){& .card.wiki:hover{color:#000;background-color:#fff}& .card.douyin:hover{background-color:var(--douyin-text);color:var(--douyin-bg)}}}.filter-container{flex-wrap:wrap;justify-content:center;gap:10px;width:100%;max-width:1000px;margin:20px auto 0;display:flex}.filter-btn{background:var(--card-bg);border:1px solid var(--item-border);width:70px;color:var(--text-sub);cursor:pointer;text-align:center;box-shadow:var(--card-shadow);font-variant-numeric:tabular-nums;font-feature-settings:normal;border-radius:8px;padding:8px 0;font-family:inherit;font-size:.85rem;font-weight:400;transition:all .3s cubic-bezier(.4,0,.2,1)}.filter-btn:hover{color:var(--primary-blue);box-shadow:var(--card-hover-shadow);transform:scale(1.1)}.filter-btn.active{box-shadow:0 4px 15px #1e66c64d;background:var(--primary-blue)!important;color:var(--on-primary)!important;border-color:var(--primary-blue)!important}.page-hero{color:#fff;text-align:center;background:linear-gradient(#90befc 24%,#0e347a 77.2%,#0b122a 100%);flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:240px;padding-top:40px;display:flex;position:relative}.page-hero section.hero-content{z-index:2;flex-direction:column;justify-content:center;align-items:center;width:100%;max-width:5000px;padding:0 20px;display:flex;position:relative}.page-hero h1{color:#fff;text-shadow:0 4px 12px #080f2666;margin-bottom:5px;font-size:2.8rem}.page-hero .tagline{color:#fff;max-width:600px;margin-bottom:10px;font-size:1rem}@media (width<=768px){.page-hero h1{font-size:2.2rem}}.typography-body{max-width:800px;color:var(--text-main);user-select:text;margin:0 auto;padding:3rem 1.5rem;font-size:1.05rem;line-height:1.8}.typography-body p,.typography-body li{margin-bottom:1.4rem}.typography-body h1,.typography-body h2,.typography-body h3,.typography-body h4{color:var(--text-main);margin-top:2.5rem;margin-bottom:1rem;font-weight:700}.typography-body h1{font-size:2.2rem}.typography-body h2{border-bottom:1px solid var(--item-border);padding-bottom:.6rem;font-size:1.6rem}.typography-body h3{font-size:1.3rem}.typography-body ul,.typography-body ol{margin-bottom:1.4rem;padding-left:1.8rem}.typography-body li{margin-bottom:.6rem}.typography-body code{background:var(--item-border);color:var(--primary-blue);border-radius:4px;padding:.2rem .4rem;font-family:monospace;font-size:.9em}.typography-body a{color:var(--primary-blue);border-bottom:1px dashed var(--primary-blue);text-decoration:none;transition:color .2s,border-color .2s}.typography-body a:hover{color:var(--text-sub);border-bottom-style:solid}.blog-list-wrapper{max-width:800px;margin:0 auto;padding:3rem 1.5rem}.blog-list-wrapper h2{color:var(--text-main);margin-bottom:2rem;font-size:1.5rem;font-weight:600}.post-list{flex-direction:column;gap:1.5rem;margin:2rem 0;padding:0;list-style:none;display:flex}.post-item{background-color:var(--card-bg);border-radius:var(--card-radius);border:1px solid var(--item-border);box-shadow:var(--card-shadow);padding:24px;transition:transform .3s,box-shadow .3s}.post-item:hover{box-shadow:var(--card-hover-shadow)}.post-title-link{color:var(--text-main);text-decoration:none}.post-title-link h3{margin:0;font-size:1.35rem;font-weight:600;transition:color .2s}.post-item:hover .post-title-link h3{color:var(--primary-blue)}.post-desc{color:var(--text-sub);margin-top:.8rem;font-size:.95rem;line-height:1.6}