:root{color-scheme:light;--color-primary: #2a5bd7;--color-primary-dark: #1e40af;--color-text: #1f2937;--color-text-light: #6b7280;--color-border: #e5e7eb;--color-bg: #ffffff;--color-bg-soft: #f9fafb;--color-bg-card: #ffffff;--color-badge: #eef4ff;--max-width: 1080px;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .08);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .1)}[data-theme=dark]{color-scheme:dark;--color-primary: #6b8df5;--color-primary-dark: #8aa5f7;--color-text: #e5e7eb;--color-text-light: #9ca3af;--color-border: #374151;--color-bg: #1a1d24;--color-bg-soft: #14171c;--color-bg-card: #22262e;--color-badge: #1e293b;--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .55)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--color-text);background:var(--color-bg-soft);line-height:1.7;-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none;transition:color .2s}a:hover{color:var(--color-primary-dark);text-decoration:underline}img{max-width:100%;height:auto}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.site-header{background:var(--color-bg);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}.site-header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}.site-logo{font-size:1.25rem;font-weight:700;color:var(--color-text)}.site-logo:hover{text-decoration:none}.site-nav{display:flex;gap:28px;align-items:center}.site-nav a{color:var(--color-text-light);font-size:.95rem;font-weight:500}.site-nav a:hover,.site-nav a.active{color:var(--color-primary);text-decoration:none}.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:40px;height:40px;padding:9px;margin-left:12px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-bg);cursor:pointer}.nav-toggle span{display:block;width:100%;height:2px;background:var(--color-text);border-radius:1px;transition:background .2s}.nav-toggle:hover span{background:var(--color-primary)}.site-footer{background:var(--color-bg);border-top:1px solid var(--color-border);padding:32px 0;margin-top:64px;text-align:center;color:var(--color-text-light);font-size:.875rem}.site-footer a{color:var(--color-text-light);margin:0 8px}.footer-qrcodes{display:flex;justify-content:center;gap:48px;margin-bottom:20px}.footer-qrcode{display:flex;flex-direction:column;align-items:center;gap:6px}.footer-qrcode img{width:120px;height:120px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);padding:6px}.footer-qrcode span{font-size:.8rem;color:var(--color-text-light)}.breadcrumb{font-size:.875rem;color:var(--color-text-light);margin-bottom:20px}.breadcrumb a{color:var(--color-text-light)}.breadcrumb span{margin:0 8px;color:var(--color-border)}.page-title{font-size:1.75rem;font-weight:700;margin-bottom:8px}.page-subtitle{color:var(--color-text-light);font-size:.95rem;margin-bottom:32px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-bottom:48px}.card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:box-shadow .2s,transform .2s}.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.card-title{font-size:1.1rem;font-weight:600;margin-bottom:8px}.card-title a{color:var(--color-text)}.card-title a:hover{color:var(--color-primary);text-decoration:none}.card-meta{font-size:.8rem;color:var(--color-text-light);margin-bottom:12px}.card-preview{font-size:.9rem;color:var(--color-text-light);line-height:1.6}.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;background:var(--color-badge);color:var(--color-primary);margin-right:6px}.tag-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}.tag{display:inline-block;padding:6px 16px;border-radius:20px;font-size:.875rem;background:var(--color-bg);border:1px solid var(--color-border);color:var(--color-text-light);cursor:pointer;transition:all .2s}.tag:hover,.tag.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary);text-decoration:none}.paper-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px}.paper-sidebar-inner{position:sticky;top:84px}.paper-sidebar-title{font-size:.85rem;font-weight:600;color:var(--color-text-light);margin-bottom:12px}.tag-bar-side{flex-direction:column;align-items:stretch;gap:8px;margin-bottom:0}.tag-bar-side .tag{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.paper-main{min-width:0}.paper-section{scroll-margin-top:84px}@media(max-width:860px){.paper-layout{grid-template-columns:1fr}.paper-sidebar-inner{position:static}.tag-bar-side{flex-direction:row;flex-wrap:wrap;align-items:center}.tag-bar-side .tag{white-space:normal;overflow:visible;text-overflow:clip}}.detail-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow);margin-bottom:32px}.detail-title{font-size:1.875rem;font-weight:700;margin-bottom:12px;line-height:1.3}.detail-author{color:var(--color-text-light);font-size:1rem;margin-bottom:28px}.poem-body{font-size:1.25rem;line-height:2.4;text-align:center;padding:24px 0}.poem-body p{margin:0}.audio-panel{background:var(--color-bg-soft);border-radius:var(--radius);padding:20px;margin-bottom:28px}.player-title{font-size:.9rem;color:var(--color-text-light);margin-bottom:10px}.player-range{-webkit-appearance:none;appearance:none;display:block;width:100%;height:4px;border-radius:2px;background:linear-gradient(to right,var(--color-primary) var(--progress, 0%),var(--color-border) var(--progress, 0%));cursor:pointer;margin:0}.player-range:disabled{cursor:default;opacity:.6}.player-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--color-primary);border:2px solid #fff;box-shadow:0 1px 4px #00000040;cursor:pointer}.player-range::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--color-primary);border:2px solid #fff;box-shadow:0 1px 4px #00000040;cursor:pointer}.player-time{display:flex;justify-content:space-between;font-size:.75rem;color:var(--color-text-light);margin-top:6px;margin-bottom:14px}.player-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.player-controls{display:flex;align-items:center;gap:10px}.player-btn{min-width:40px;height:40px;padding:0 12px;border-radius:20px;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text);font-size:.85rem;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}.player-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.player-btn-main{min-width:52px;height:52px;padding:0;border-radius:50%;border:none;background:var(--color-primary);color:#fff;font-size:1.25rem}.player-btn-main:hover{background:var(--color-primary-dark);color:#fff}.player-btn-active{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-bg-soft)}.player-speed{position:relative}.player-speed-backdrop{position:fixed;inset:0;z-index:19}.player-speed-menu{position:absolute;bottom:calc(100% + 10px);right:0;z-index:20;min-width:88px;padding:6px;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;gap:2px}.player-speed-item{border:none;background:none;padding:6px 12px;border-radius:6px;font-size:.85rem;color:var(--color-text);cursor:pointer;text-align:center;white-space:nowrap}.player-speed-item:hover{background:var(--color-bg-soft)}.player-speed-item.active{background:var(--color-primary);color:#fff}.action-group{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}.btn{display:inline-block;padding:8px 20px;border-radius:var(--radius);font-size:.9rem;cursor:pointer;transition:all .2s;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text)}.btn:hover{text-decoration:none;border-color:var(--color-primary);color:var(--color-primary)}.btn-primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.btn-primary:hover{background:var(--color-primary-dark);color:#fff}.nav-switch{display:flex;justify-content:space-between;gap:16px;margin-top:32px;padding-top:24px;border-top:1px solid var(--color-border)}.nav-switch .btn{flex:1;text-align:center}.empty-state{text-align:center;padding:80px 20px;color:var(--color-text-light)}.hero{background:linear-gradient(135deg,#2a5bd7,#1e40af);color:#fff;padding:72px 0;text-align:center;margin-bottom:48px}.hero h1{font-size:2.5rem;font-weight:800;margin-bottom:16px}.hero p{font-size:1.125rem;opacity:.92;max-width:600px;margin:0 auto}.hero-buttons{display:flex;gap:16px;justify-content:center;margin-top:32px}.hero-buttons a{padding:12px 32px;border-radius:var(--radius);font-weight:600;font-size:1rem}.hero-btn-primary{background:#fff;color:var(--color-primary)}.hero-btn-primary:hover{text-decoration:none;color:var(--color-primary-dark)}.hero-btn-secondary{border:2px solid rgba(255,255,255,.7);color:#fff}.hero-btn-secondary:hover{text-decoration:none;background:#ffffff26;color:#fff}.section-title{font-size:1.5rem;font-weight:700;margin-bottom:24px;padding-bottom:12px;border-bottom:2px solid var(--color-border)}.list-item{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--color-border)}.list-item:last-child{border-bottom:none}.list-item-title{font-weight:500;color:var(--color-text)}.list-item-title:hover{color:var(--color-primary);text-decoration:none}.list-item-meta{font-size:.8rem;color:var(--color-text-light);white-space:nowrap;margin-left:16px}.download-hero{text-align:center;padding:48px 24px;margin-bottom:40px}.download-hero h1{font-size:2rem;font-weight:800;margin-bottom:12px}.download-hero p{color:var(--color-text-light);max-width:560px;margin:0 auto 24px}.download-hero-actions{margin-top:8px}.download-btn-primary{display:inline-block;padding:14px 40px;border-radius:var(--radius);background:var(--color-primary);color:#fff;font-weight:600;font-size:1rem;box-shadow:var(--shadow);transition:background .2s,transform .2s}.download-btn-primary:hover{background:var(--color-primary-dark);color:#fff;text-decoration:none;transform:translateY(-1px)}.download-note{font-size:.8rem;color:var(--color-text-light);margin-top:16px}.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;max-width:720px;margin:0 auto}.download-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);padding:28px 20px;box-shadow:var(--shadow);text-align:center}.download-card img{width:180px;height:180px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);padding:8px;margin-bottom:16px}.download-card h3{font-size:1.05rem;font-weight:600;margin-bottom:6px}.download-card p{font-size:.85rem;color:var(--color-text-light)}.question-card{display:flex;flex-direction:column;gap:8px}.question-stem-preview{font-size:.95rem;line-height:1.7;color:var(--color-text);display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.badge-solid{background:var(--color-primary);color:#fff}.badge-warn{background:#fff3e6;color:#d97817}[data-theme=dark] .badge-warn{background:#d9781733;color:#f0a35c}.question-stem{font-size:1.15rem;line-height:2;margin-bottom:28px;word-break:break-word}.question-options{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}.question-option{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;background:var(--color-bg-soft);border:1px solid var(--color-border);border-radius:var(--radius);line-height:1.8}.question-option-key{flex:0 0 auto;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:var(--color-badge);color:var(--color-primary);font-weight:700;font-size:.9rem}.question-subquestions{margin-bottom:8px}.question-subtitle{font-size:.9rem;font-weight:600;color:var(--color-text-light);margin-bottom:12px}.question-subquestion{line-height:2;margin-bottom:8px;word-break:break-word}.question-subquestion-index{color:var(--color-primary);font-weight:600;margin-right:4px}.listen-audio{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:12px 16px;background:var(--color-bg-soft);border:1px solid var(--color-border);border-radius:var(--radius);margin-bottom:24px}.listen-audio-label{font-size:.9rem;font-weight:600;color:var(--color-primary)}.listen-audio audio{height:36px;flex:1 1 260px}.material-panel{background:var(--color-bg-soft);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px 22px;margin-bottom:24px}.material-block{margin-bottom:16px}.material-block:last-child{margin-bottom:0}.material-label{font-size:.9rem;font-weight:700;color:var(--color-primary);margin-bottom:8px}.material-paragraph{line-height:2;margin-bottom:8px;text-indent:2em;word-break:break-word}.material-paragraph:last-child{margin-bottom:0}.question-answer-block{border-top:1px dashed var(--color-border);padding-top:16px;margin-bottom:20px}.question-answer,.question-analysis,.question-transcript{line-height:2;word-break:break-word;white-space:pre-wrap}.question-answer{color:var(--color-primary);font-weight:600}.answer-reveal{border:1px solid var(--color-border);border-radius:var(--radius);margin-bottom:24px;overflow:hidden}.answer-reveal summary{display:flex;align-items:center;justify-content:space-between;gap:8px;cursor:pointer;padding:13px 16px;font-size:.9rem;font-weight:600;color:var(--color-primary);background:var(--color-bg-soft);list-style:none;user-select:none;-webkit-user-select:none}.answer-reveal summary::-webkit-details-marker{display:none}.answer-reveal summary:after{content:"点击展开 ▾";flex:0 0 auto;font-size:.8rem;font-weight:400;color:var(--color-text-light)}.answer-reveal[open] summary:after{content:"点击收起 ▴"}.answer-reveal-body{padding:4px 16px 14px}.answer-reveal-body .question-answer-block:last-child{margin-bottom:0}@media(max-width:640px){.container,.site-header-inner{padding:0 16px}.hero h1{font-size:1.875rem}.detail-card{padding:24px}.detail-title{font-size:1.5rem}.poem-body{font-size:1.1rem}.card-grid{grid-template-columns:1fr}.download-hero h1{font-size:1.75rem}.download-grid{grid-template-columns:1fr}.download-card img{width:150px;height:150px}}.theme-toggle{position:relative;margin-left:8px}.theme-toggle-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--color-border);background:var(--color-bg);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:border-color .2s,color .2s;line-height:1;color:var(--color-text)}.theme-toggle-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.theme-toggle-icon{font-size:1.05rem;line-height:1}.theme-toggle-menu{position:absolute;top:calc(100% + 10px);right:0;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-hover);padding:6px;min-width:148px;z-index:200}.theme-toggle-item{display:flex;align-items:center;gap:10px;width:100%;padding:8px 12px;border:none;background:transparent;color:var(--color-text);font-size:.875rem;border-radius:6px;cursor:pointer;text-align:left;transition:background .15s,color .15s}.theme-toggle-item:hover{background:var(--color-bg-soft)}.theme-toggle-item.active{color:var(--color-primary);font-weight:600}.theme-toggle-check{margin-left:auto;color:var(--color-primary);font-size:.8rem}.login-btn{height:36px;padding:0 16px;border-radius:18px;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text);font-size:.875rem;font-weight:500;cursor:pointer;transition:border-color .2s,color .2s,background .2s;white-space:nowrap}.login-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.login-modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.login-modal{width:100%;max-width:400px;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:12px;box-shadow:var(--shadow-hover);padding:20px 24px 24px}.login-modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.login-modal-title{font-size:1.05rem;font-weight:600;color:var(--color-text)}.login-modal-close{width:32px;height:32px;border:none;background:transparent;color:var(--color-text-light);font-size:1rem;cursor:pointer;border-radius:6px;transition:background .15s,color .15s}.login-modal-close:hover{background:var(--color-bg-soft);color:var(--color-text)}.login-field{display:block;margin-bottom:14px}.login-field>span{display:block;font-size:.875rem;color:var(--color-text);margin-bottom:6px}.login-field input{width:100%;height:40px;padding:0 12px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);color:var(--color-text);font-size:.925rem;outline:none;transition:border-color .2s,box-shadow .2s}.login-field input:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #2a5bd726}.login-code-row{display:flex;gap:8px}.login-code-row input{flex:1;min-width:0}.login-send-btn{flex-shrink:0;height:40px;padding:0 12px;border:1px solid var(--color-primary);border-radius:var(--radius);background:transparent;color:var(--color-primary);font-size:.85rem;cursor:pointer;transition:background .15s,color .15s;white-space:nowrap}.login-send-btn:hover:not(:disabled){background:var(--color-primary);color:#fff}.login-send-btn:disabled{opacity:.55;cursor:not-allowed}.login-captcha-img{flex-shrink:0;height:40px;width:96px;border:1px solid var(--color-border);border-radius:var(--radius);cursor:pointer;object-fit:cover}.login-error{color:#dc2626;font-size:.85rem;margin:4px 0 10px}.login-notice{color:#16a34a;font-size:.85rem;margin:4px 0 10px}.login-btn-block{width:100%;height:42px;border:none;border-radius:var(--radius);background:var(--color-primary);color:#fff;font-size:.95rem;font-weight:500;cursor:pointer;transition:background .2s}.login-btn-block:hover:not(:disabled){background:var(--color-primary-dark)}.login-btn-block:disabled{opacity:.6;cursor:not-allowed}.login-btn-secondary{background:transparent;color:var(--color-text);border:1px solid var(--color-border)}.login-btn-secondary:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary);background:transparent}.login-hint{margin-top:12px;font-size:.8rem;color:var(--color-text-light);text-align:center}.login-account{display:flex;flex-direction:column;align-items:center;text-align:center}.login-account-avatar{width:64px;height:64px;border-radius:50%;overflow:hidden;background:var(--color-badge);display:flex;align-items:center;justify-content:center;font-size:1.75rem;margin-bottom:12px}.login-account-avatar img{width:100%;height:100%;object-fit:cover}.login-account-name{font-size:1rem;font-weight:600;color:var(--color-text)}.login-account-mobile{font-size:.875rem;color:var(--color-text-light);margin-bottom:8px}.login-account .login-hint{margin-top:0;margin-bottom:16px}.lsb-toast{position:fixed;top:80px;left:50%;transform:translate(-50%);z-index:1100;background:var(--color-bg-card);color:var(--color-text);border:1px solid var(--color-border);border-radius:20px;padding:8px 20px;font-size:.875rem;box-shadow:var(--shadow-hover)}.header-search{flex:1;max-width:260px;margin:0 20px}.header-search input{width:100%;height:36px;padding:0 14px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-bg-soft);color:var(--color-text);font-size:.875rem;outline:none;transition:border-color .2s,background .2s}.header-search input:focus{border-color:var(--color-primary);background:var(--color-bg)}.search-hero{text-align:center;margin-bottom:32px}.search-hero .page-subtitle{margin-bottom:24px}.search-box{display:flex;max-width:640px;margin:0 auto;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:24px;box-shadow:var(--shadow);overflow:hidden;transition:border-color .2s,box-shadow .2s}.search-box:focus-within{border-color:var(--color-primary);box-shadow:var(--shadow-hover)}.search-box input{flex:1;height:48px;padding:0 20px;border:none;outline:none;background:transparent;color:var(--color-text);font-size:1rem}.search-box input::-webkit-search-cancel-button{cursor:pointer}.search-box button{padding:0 24px;border:none;background:var(--color-primary);color:#fff;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .2s}.search-box button:hover{background:var(--color-primary-dark)}.search-hot{margin-top:16px;font-size:.875rem;color:var(--color-text-light)}.search-hot button{display:inline-block;margin:4px 6px;padding:4px 14px;border:1px solid var(--color-border);border-radius:16px;background:var(--color-bg-card);color:var(--color-text-light);font-size:.85rem;cursor:pointer;transition:border-color .2s,color .2s}.search-hot button:hover{border-color:var(--color-primary);color:var(--color-primary)}.search-filter{display:flex;gap:10px;margin-bottom:24px}.search-filter button{padding:6px 16px;border:1px solid var(--color-border);border-radius:20px;background:var(--color-bg-card);color:var(--color-text-light);font-size:.875rem;cursor:pointer;transition:all .2s}.search-filter button.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.search-status{text-align:center;color:var(--color-text-light);padding:32px 0;font-size:.95rem}.fav-item{display:flex;align-items:center;gap:10px}.fav-item .search-result-item{flex:1;min-width:0}.fav-remove{flex-shrink:0;width:36px;height:36px;border-radius:50%;border:1px solid var(--color-border);background:var(--color-bg-card);color:var(--color-text-light);font-size:.85rem;cursor:pointer;transition:all .2s}.fav-remove:hover{border-color:#e5484d;color:#e5484d}.search-result-list{display:flex;flex-direction:column;gap:12px;margin-bottom:12px}.search-result-item{display:block;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius);padding:16px 20px;color:inherit;text-decoration:none;transition:box-shadow .2s,transform .2s,border-color .2s}.search-result-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-1px);text-decoration:none}.search-result-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.search-result-title{font-size:1.05rem;font-weight:600;color:var(--color-text)}.search-result-item:hover .search-result-title{color:var(--color-primary)}.search-result-meta{font-size:.85rem;color:var(--color-text-light);margin-top:4px}.search-result-snippet{font-size:.9rem;color:var(--color-text-light);margin-top:8px;line-height:1.7}.search-result-more{font-size:.8rem;color:var(--color-text-light);margin-bottom:40px}mark{background:transparent;color:var(--color-primary);font-weight:700}@media(max-width:640px){.site-header-inner{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:10px;row-gap:10px}.site-logo{margin-right:auto}.nav-toggle{display:flex}.site-nav{display:none;order:4;flex-basis:100%;flex-direction:column;align-items:stretch;gap:0;padding:8px 0 4px;border-top:1px solid var(--color-border)}.site-header.nav-open .site-nav{display:flex}.site-nav a{padding:10px 0}.site-nav .login-btn{margin-top:8px;width:100%;height:38px}.site-nav .theme-toggle{margin:8px 0 4px}.header-search{order:3;flex-basis:100%;max-width:none;margin:0}.search-box button{padding:0 16px}}