:root{--bg: #f7f8fa;--surface: #ffffff;--ink: #1a202c;--ink-2: #4a5568;--ink-3: #8a94a6;--line: #e6e9ef;--brand: #2f6bff;--brand-dark: #1d4fd7;--brand-soft: #eaf0ff;--accent: #0fa36b;--warn-bg: #fff7ed;--warn-line: #fdba74;--radius: 12px;--shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 8px 24px -12px rgba(16, 24, 40, .12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.container{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}.brand{display:flex;align-items:center;gap:10px;font-weight:700}.brand-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),#6a8dff);color:#fff;font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}.brand-text{line-height:1.2}.brand-text small{display:block;font-size:11px;color:var(--ink-3);font-weight:400}.main-nav{display:flex;gap:4px;overflow-x:auto}.nav-link{padding:8px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-2);white-space:nowrap}.nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}.nav-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}.hero{padding:72px 0 56px;text-align:center}.hero-badge{display:inline-block;padding:6px 14px;border-radius:999px;font-size:13px;background:var(--brand-soft);color:var(--brand-dark);margin-bottom:20px;font-weight:500}.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.25;margin:0 0 16px;letter-spacing:-.5px}.hero h1 em{font-style:normal;color:var(--brand)}.hero p.sub{font-size:17px;color:var(--ink-2);max-width:640px;margin:0 auto 32px}.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .15s ease}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}.btn-sm{padding:8px 16px;font-size:14px}.section{padding:56px 0}.section-head{margin-bottom:28px}.section-head h2{font-size:26px;margin:0 0 8px;letter-spacing:-.3px}.section-head p{color:var(--ink-2);margin:0}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:all .15s ease;display:flex;flex-direction:column;gap:8px}a.card:hover,.card.hoverable:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cdd7ea}.card .emoji{font-size:26px;line-height:1}.card h3{margin:0;font-size:16.5px;line-height:1.45}.card p{margin:0;color:var(--ink-2);font-size:14px;flex:1}.card .meta{font-size:12.5px;color:var(--ink-3);display:flex;gap:8px;align-items:center}.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:500;background:var(--brand-soft);color:var(--brand-dark)}.tag-free{background:#e7f6ef;color:var(--accent)}.tag-vip{background:#fff3e0;color:#b45309}.subscribe-box{background:linear-gradient(135deg,#1d2b53,#2f6bff);border-radius:16px;padding:40px 32px;color:#fff;text-align:center}.subscribe-box h2{margin:0 0 8px;font-size:24px}.subscribe-box p{margin:0 0 24px;opacity:.85;font-size:15px}.subscribe-form{display:flex;gap:10px;max-width:460px;margin:0 auto}.subscribe-form input{flex:1;padding:12px 16px;border-radius:10px;border:none;font-size:15px;outline:none}.subscribe-box .btn-primary{background:#fff;color:var(--brand-dark)}.subscribe-msg{margin-top:14px;font-size:14px;min-height:20px}.page-head{padding:48px 0 8px}.page-head h1{font-size:30px;margin:0 0 8px;letter-spacing:-.4px}.page-head p{color:var(--ink-2);margin:0;max-width:720px}.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.chip{padding:7px 16px;border-radius:999px;font-size:13.5px;cursor:pointer;background:var(--surface);border:1px solid var(--line);color:var(--ink-2)}.chip:hover{border-color:var(--brand);color:var(--brand-dark)}.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}.article-list{display:flex;flex-direction:column;gap:14px;padding-bottom:56px}.article-row{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.article-row:hover{box-shadow:var(--shadow)}.article-row .emoji{font-size:30px;line-height:1.2;flex-shrink:0}.article-row h3{margin:4px 0 6px;font-size:17px}.article-row p{margin:0;color:var(--ink-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.md-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px 40px;margin-bottom:56px}.md-body h2{font-size:21px;margin:36px 0 14px;padding-top:8px;border-top:1px solid var(--line)}.md-body h2:first-child{margin-top:0;border-top:none}.md-body p{margin:12px 0;font-size:15.5px;color:#2d3748}.md-body strong{color:var(--ink)}.md-body ul,.md-body ol{padding-left:22px;margin:12px 0}.md-body li{margin:6px 0;font-size:15.5px}.md-body blockquote{margin:16px 0;padding:14px 18px;border-left:3px solid var(--brand);background:var(--brand-soft);border-radius:0 8px 8px 0;color:#2d3748;font-size:15px}.md-body code{background:#eef1f6;padding:2px 6px;border-radius:5px;font-size:13.5px;font-family:SF Mono,Consolas,monospace;color:#c7254e}.md-body pre{background:#1e1e1e;padding:16px;border-radius:8px;overflow-x:auto}.md-body pre code{background:none;color:#d4d4d4;padding:0}.md-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px}.md-body th,.md-body td{border:1px solid var(--line);padding:9px 12px;text-align:left}.md-body th{background:#f1f4f9;font-weight:600}.steps{display:flex;flex-direction:column;gap:16px;margin-bottom:56px}.step-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.step-head{display:flex;align-items:center;gap:12px;padding:18px 22px;cursor:pointer;-webkit-user-select:none;user-select:none}.step-no{width:30px;height:30px;border-radius:50%;background:var(--brand-soft);color:var(--brand-dark);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.step-head h3{margin:0;font-size:16.5px;flex:1}.step-body{padding:0 22px 20px 64px;white-space:pre-wrap;color:#2d3748;font-size:15px;line-height:1.9}.copy-btn{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:6px 14px;font-size:13px;cursor:pointer;color:var(--ink-2);flex-shrink:0}.copy-btn:hover{border-color:var(--brand);color:var(--brand-dark)}.copy-btn.copied{background:#e7f6ef;border-color:var(--accent);color:var(--accent)}.lock-banner{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:var(--radius);padding:20px 24px;margin-bottom:24px}.lock-banner strong{color:#9a3412}.tool-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.tool-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:56px}.tool-panel label{font-weight:600;font-size:14.5px;display:block;margin-bottom:8px}.tool-panel textarea{width:100%;min-height:140px;padding:14px;border-radius:10px;border:1px solid var(--line);font-size:15px;font-family:inherit;resize:vertical;outline:none;line-height:1.7}.tool-panel 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20px;font-size:12.5px;color:#7c8698}.empty{text-align:center;color:var(--ink-3);padding:64px 0;font-size:15px}.loading{text-align:center;color:var(--ink-3);padding:48px 0}.error-box{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:16px 20px;border-radius:10px;margin-bottom:24px;font-size:14.5px}.breadcrumb{font-size:13.5px;color:var(--ink-3);margin-bottom:14px;display:flex;gap:6px;align-items:center}.breadcrumb a:hover{color:var(--brand-dark)}.tool-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:box-shadow .15s,transform .15s}a.tool-card:hover{box-shadow:0 8px 24px #1725541a;transform:translateY(-2px)}.tool-section{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-bottom:16px}.tool-section h2{font-size:17px;margin:0 0 10px;letter-spacing:-.2px}.tool-section p{margin:0;color:var(--ink-2);line-height:1.85}.tool-section.warn{background:#fffaf5;border-color:#fde3c8}.tool-section.start{background:#f4fbf7;border-color:#bfe6d0}.check-list{margin:0;padding-left:2px;list-style:none}.check-list li{position:relative;padding-left:22px;margin-bottom:8px;color:var(--ink-2);line-height:1.75;font-size:14.5px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.tool-section.warn .check-list li:before{content:"!";color:#b45309;background:#fde3c8;border-radius:50%;width:16px;height:16px;display:flex;align-items:center;justify-content:center;font-size:12px;top:2px}@media(max-width:720px){.hero{padding:48px 0 40px}.md-body{padding:24px 20px}.article-row{flex-direction:column;gap:10px}.subscribe-form{flex-direction:column}.brand-text small{display:none}}