:root{--primary-color:#07b088;--primary-dark:#058f6e;--secondary-color:#00b4d8;--bg-color:#f8fafc;--card-bg:#fff;--text-main:#1e293b;--text-muted:#64748b;--text-title:#0f172a;--border-color:rgba(226,232,240,.8);--shadow-sm:0 1px 3px rgba(0,0,0,.05);--shadow-md:0 10px 30px -10px rgba(0,0,0,.05);--shadow-hover:0 20px 40px -15px rgba(7,176,136,.15);--transition:all .3s cubic-bezier(.4, 0, .2, 1);--max-width:1200px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans CJK SC,Microsoft YaHei,sans-serif;line-height:1.6}.lang-bar{border-bottom:1px solid var(--border-color);background-color:#f1f5f9;width:100%;position:relative;overflow:hidden}.lang-bar-inner{white-space:nowrap;-ms-overflow-style:none;scrollbar-width:none;flex-wrap:nowrap;gap:20px;padding:10px 20px;display:flex;overflow-x:auto}.lang-bar-inner::-webkit-scrollbar{height:5px;display:none}.lang-bar:hover .lang-bar-inner{scrollbar-width:thin;-ms-overflow-style:auto}.lang-bar:hover .lang-bar-inner::-webkit-scrollbar{display:block}.lang-bar-inner::-webkit-scrollbar-thumb{background-color:#cbd5e1;border-radius:10px}.lang-bar-inner::-webkit-scrollbar-track{background:0 0}.lang-bar-inner a{color:var(--text-muted);transition:var(--transition);font-size:13px;font-weight:500;text-decoration:none}.lang-bar-inner a:hover{color:var(--primary-color)}.site-header{background-color:var(--card-bg);border-bottom:1px solid var(--border-color);width:100%;position:static}.header-container{max-width:var(--max-width);justify-content:space-between;align-items:center;margin:0 auto;padding:15px 20px;display:flex}.logo{align-items:center;gap:10px;text-decoration:none;display:flex}.logo-text{background:linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);-webkit-text-fill-color:transparent;letter-spacing:-.5px;-webkit-background-clip:text;font-size:24px;font-weight:800}.logo-badge{color:var(--primary-color);background-color:rgba(7,176,136,.1);border-radius:12px;padding:2px 8px;font-size:12px;font-weight:600}.nav-links{align-items:center;gap:25px;display:flex}.nav-links a{color:var(--text-main);transition:var(--transition);font-size:15px;font-weight:500;text-decoration:none;position:relative}.nav-links a:hover{color:var(--primary-color)}.nav-links a:after{content:"";background-color:var(--primary-color);width:0;height:2px;transition:var(--transition);position:absolute;bottom:-4px;left:0}.nav-links a:hover:after{width:100%}.nav-links a.active{color:var(--primary-color);font-weight:600}.nav-links a.active:after{width:100%}.nav-links .external-tool-btn{background-color:var(--primary-color);color:#fff;box-shadow:var(--shadow-sm);border-radius:8px;padding:8px 16px;font-weight:600}.nav-links .external-tool-btn:after{display:none}.nav-links .external-tool-btn:hover{background-color:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(7,176,136,.2)}.hero-section{text-align:center;border-bottom:1px solid var(--border-color);background:radial-gradient(circle at 100% 0,rgba(0,180,216,.05),transparent 60%),radial-gradient(circle at 0 100%,rgba(7,176,136,.05),transparent 60%);padding:80px 20px}.hero-container{max-width:800px;margin:0 auto}.hero-badge{color:var(--primary-color);background-color:rgba(7,176,136,.08);border-radius:20px;margin-bottom:20px;padding:6px 14px;font-size:14px;font-weight:600;display:inline-block}.hero-title{color:var(--text-title);letter-spacing:-1px;margin-bottom:20px;font-size:48px;font-weight:800;line-height:1.2}.hero-title span{background:linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-subtitle{color:var(--text-muted);margin-bottom:40px;font-size:18px;line-height:1.8}.hero-actions{justify-content:center;gap:20px;display:flex}.btn{transition:var(--transition);cursor:pointer;border-radius:10px;padding:14px 32px;font-size:16px;font-weight:600;text-decoration:none;display:inline-block}.btn-primary{background:linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);color:#fff;box-shadow:0 4px 20px rgba(7,176,136,.25)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(7,176,136,.35)}.btn-secondary{background-color:var(--card-bg);color:var(--text-main);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background-color:#f8fafc;border-color:#cbd5e1;transform:translateY(-2px)}.features-section{max-width:var(--max-width);margin:0 auto;padding:80px 20px}.section-header{text-align:center;max-width:600px;margin:0 auto 60px}.section-title{color:var(--text-title);margin-bottom:15px;font-size:32px;font-weight:800}.section-desc{color:var(--text-muted);font-size:16px}.features-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;display:grid}.feature-card{background-color:var(--card-bg);border:1px solid var(--border-color);box-shadow:var(--shadow-md);transition:var(--transition);border-radius:16px;padding:35px;position:relative;overflow:hidden}.feature-card:before{content:"";background:linear-gradient(90deg, var(--primary-color), var(--secondary-color));opacity:0;width:100%;height:4px;transition:var(--transition);position:absolute;top:0;left:0}.feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-6px)}.feature-card:hover:before{opacity:1}.feature-icon-wrapper{width:60px;height:60px;color:var(--primary-color);background-color:rgba(7,176,136,.08);border-radius:12px;justify-content:center;align-items:center;margin-bottom:25px;font-size:24px;font-weight:700;display:flex}.feature-card h3{color:var(--text-title);margin-bottom:15px;font-size:20px;font-weight:700}.feature-card p{color:var(--text-muted);font-size:15px;line-height:1.7}.ad-container{max-width:var(--max-width);text-align:center;margin:30px auto;padding:0 20px}.ad-wrapper{background-color:#f1f5f9;border:1px dashed #cbd5e1;border-radius:12px;width:100%;padding:15px;display:inline-block}.site-footer{color:#94a3b8;background-color:#0f172a;border-top:1px solid #1e293b;margin-top:60px;padding:60px 20px}.footer-container{max-width:var(--max-width);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:30px;margin:0 auto;display:flex}.footer-info{max-width:600px}.footer-info p{margin-bottom:10px;font-size:14px}.footer-info a{color:var(--primary-color);transition:var(--transition);font-weight:600;text-decoration:none}.footer-info a:hover{color:#10b981;text-decoration:underline}@media (max-width:768px){.header-container{text-align:center;flex-direction:column;gap:15px}.nav-links{flex-wrap:wrap;justify-content:center;gap:15px}.hero-title{font-size:36px}.hero-subtitle{font-size:16px}.hero-actions{flex-direction:column;align-items:center;gap:12px}.hero-actions .btn{width:100%;max-width:300px}.footer-container{text-align:center;flex-direction:column}}