*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei',Arial,sans-serif;background:#0a1628;color:#fff;line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
nav{background:rgba(10,22,40,0.95);border-bottom:1px solid rgba(255,255,255,0.1);padding:15px 0;position:sticky;top:0;z-index:1000}
nav .container{display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.logo img{height:32px}
.logo span{font-size:1.2em;font-weight:bold;color:#00d4aa}
.nav-links{display:flex;gap:30px}
.nav-links a{color:rgba(255,255,255,0.7);text-decoration:none;font-size:14px;transition:color 0.2s}
.nav-links a:hover{color:#00d4aa}
.hero{padding:60px 0 40px}
.hero h1{font-size:2.2em;margin-bottom:12px}
.hero h1 span{color:#00d4aa}
.hero>p{color:rgba(255,255,255,0.6);font-size:15px;max-width:600px;margin-bottom:30px}
.main-grid{display:grid;grid-template-columns:1fr 380px;gap:30px;margin-bottom:50px}
.tool-card{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.1);border-radius:16px;padding:30px}
.tool-card h2{font-size:18px;margin-bottom:20px;color:#fff}
.input-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}
.input-group{display:flex;flex-direction:column;gap:6px}
.input-group label{font-size:13px;color:rgba(255,255,255,0.5)}
.input-group input,.input-group select{padding:12px;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:8px;color:#fff;font-size:15px}
.input-group input:focus,.input-group select:focus{outline:none;border-color:#00d4aa}
.options-row{display:flex;gap:20px;margin-bottom:20px}
.checkbox-item{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,0.7);cursor:pointer}
.checkbox-item input{width:16px;height:16px;accent-color:#00d4aa}
.btn-generate{width:100%;padding:14px;background:#00d4aa;border:none;border-radius:10px;color:#0a1628;font-size:16px;font-weight:600;cursor:pointer;transition:all 0.2s}
.btn-generate:hover{background:#00e6b8;transform:translateY(-1px)}
.result-box{margin-top:20px;padding:25px;background:rgba(0,0,0,0.3);border-radius:12px;text-align:center}
.result-numbers{font-size:2em;font-weight:bold;color:#00d4aa;word-break:break-all;min-height:40px;font-family:monospace}
.btn-copy{margin-top:12px;padding:10px 25px;background:transparent;border:1px solid rgba(255,255,255,0.2);border-radius:20px;color:#fff;font-size:13px;cursor:pointer;transition:all 0.2s}
.btn-copy:hover{border-color:#00d4aa;color:#00d4aa}
.history-box{margin-top:20px;padding:15px;background:rgba(0,0,0,0.2);border-radius:10px}
.history-box h4{font-size:13px;color:rgba(255,255,255,0.5);margin-bottom:10px}
.history-list{max-height:120px;overflow-y:auto}
.history-item{padding:8px;font-size:12px;color:rgba(255,255,255,0.4);border-bottom:1px solid rgba(255,255,255,0.05);font-family:monospace}
.sidebar .tool-card{padding:20px}
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.tool-link{display:flex;align-items:center;gap:6px;padding:10px;background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);border-radius:8px;text-decoration:none;color:rgba(255,255,255,0.7);font-size:13px;transition:all 0.2s}
.tool-link:hover,.tool-link.active{background:rgba(0,212,170,0.1);border-color:rgba(0,212,170,0.3);color:#00d4aa}
.tool-link span{font-size:14px}
.section{padding:50px 0}
.section-alt{background:rgba(0,0,0,0.2)}
.section h2{font-size:1.8em;margin-bottom:12px;text-align:center}
.section h2 span{color:#00d4aa}
.section h2+p{text-align:center;color:rgba(255,255,255,0.6);margin-bottom:40px}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-item{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:12px;padding:25px;transition:all 0.3s}
.feature-item:hover{border-color:rgba(0,212,170,0.3);transform:translateY(-3px)}
.feature-item h3{font-size:16px;margin-bottom:10px;text-align:center}
.feature-item p{font-size:14px;color:rgba(255,255,255,0.6);line-height:1.7;text-align:center}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step-item{text-align:center}
.step-num{width:50px;height:50px;background:#00d4aa;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3em;font-weight:bold;color:#0a1628;margin:0 auto 15px}
.step-item h3{font-size:15px;margin-bottom:8px}
.step-item p{font-size:13px;color:rgba(255,255,255,0.5)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-item h3{padding:18px 20px;cursor:pointer;font-size:15px;font-weight:normal;display:flex;justify-content:space-between;align-items:center}
.faq-item h3:hover{background:rgba(255,255,255,0.02)}
.faq-item h3::after{content:'+';color:#00d4aa;font-size:18px}
.faq-item.active h3::after{content:'-'}
.faq-item p{display:none;padding:0 20px 18px;color:rgba(255,255,255,0.6);font-size:14px;line-height:1.8}
.faq-item.active p{display:block}
.seo-content{padding:50px 0;background:rgba(0,0,0,0.15)}
.seo-content h2{font-size:1.5em;margin-bottom:20px}
.seo-content h3{font-size:1.1em;margin:20px 0 10px}
.seo-content p{color:rgba(255,255,255,0.65);line-height:1.9;margin-bottom:12px}
.seo-content ul{color:rgba(255,255,255,0.65);line-height:2;padding-left:20px;margin-bottom:15px}
.seo-content a{color:#00d4aa;text-decoration:none}
.seo-content a:hover{text-decoration:underline}
footer{background:rgba(0,0,0,0.3);padding:30px 0;margin-top:30px}
.footer-content{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:rgba(255,255,255,0.4)}
.footer-content a{color:rgba(255,255,255,0.5);text-decoration:none}
.footer-content a:hover{color:#00d4aa}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%23fff' d='M5 7L1 3h8z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:35px;cursor:pointer}
select option{background:#0a1628;color:#fff}
@media(max-width:900px){.main-grid{grid-template-columns:1fr}.sidebar{display:none}.input-row{grid-template-columns:1fr}.features-grid{grid-template-columns:1fr}.steps-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.nav-links{display:none}.hero h1{font-size:1.6em}.result-numbers{font-size:1.5em}.steps-grid{grid-template-columns:1fr}.footer-content{flex-direction:column;gap:10px;text-align:center}}
.coin-display{width:100px;height:100px;margin:20px auto;border-radius:50%;background:linear-gradient(135deg,#fbbf24,#f59e0b);display:flex;align-items:center;justify-content:center;font-size:2em;color:#fff;box-shadow:0 4px 20px rgba(251,191,36,0.3);transition:transform 0.5s}
.color-preview{width:100%;height:80px;border-radius:10px;margin-bottom:12px}
.color-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:8px;margin-top:15px}
.color-item{height:45px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:10px;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,0.4)}
.ts-display{background:rgba(0,212,170,0.15);padding:20px;border-radius:12px;text-align:center;margin-bottom:20px}
.ts-display .num{font-size:1.8em;font-weight:bold;color:#00d4aa;font-family:monospace;cursor:pointer}
.ts-display .time{font-size:13px;color:rgba(255,255,255,0.5);margin-top:5px}