:root{--bg:#f6f8fb;--card:#ffffff;--text:#18202a;--muted:#627086;--line:#dfe6ef;--brand:#1a56db;--brand2:#0f766e;--soft:#eef4ff;--danger:#b42318;--ok:#067647}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:inherit;text-decoration:none}.container{width:min(1140px,92%);margin:0 auto}.site-header{position:sticky;top:0;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}.header-inner{height:68px;display:flex;align-items:center;gap:24px}.brand{font-weight:800;font-size:22px;color:var(--brand)}.main-nav{display:flex;gap:16px;align-items:center;margin-left:auto}.main-nav a{font-size:14px;color:#334155}.main-nav a:hover{color:var(--brand)}.nav-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:white;border-radius:10px;padding:8px 10px}.hero{padding:70px 0 40px;background:linear-gradient(135deg,#e8f1ff 0%,#f7fbff 50%,#f0fffb 100%);border-bottom:1px solid var(--line)}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;margin:0 0 18px;letter-spacing:-.04em}.hero p{font-size:18px;color:var(--muted);max-width:780px;margin:0 0 24px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;font-weight:700;background:var(--brand);color:#fff;cursor:pointer}.btn.secondary{background:#fff;color:var(--brand);border:1px solid #bfdbfe}.btn.light{background:#f8fafc;color:#0f172a;border:1px solid var(--line)}.btn.danger{background:var(--danger)}.section{padding:42px 0}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:20px}.section h2{font-size:28px;margin:0 0 6px}.section-head p,.muted{color:var(--muted);margin:0}.category-grid,.tool-grid,.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool-card,.category-card,.guide-card,.content-card,.tool-widget,.admin-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 20px rgba(15,23,42,.04)}.tool-card:hover,.category-card:hover,.guide-card:hover{border-color:#9ec5fe;transform:translateY(-2px);transition:.18s}.tool-card strong,.category-card strong,.guide-card strong{display:block;font-size:18px;margin-bottom:8px}.tool-card span,.category-card span,.guide-card span{display:block;color:var(--muted);font-size:14px}.small-grid{grid-template-columns:repeat(4,1fr)}.page-hero{padding:44px 0 20px}.page-hero h1{font-size:42px;margin:0 0 10px;letter-spacing:-.03em}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:14px}.breadcrumb a{color:var(--brand)}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start}.sidebar{position:sticky;top:88px}.content-card{margin-bottom:20px}.content-card h2{margin-top:0}.content-card h3{margin-bottom:6px}.tool-widget{margin-bottom:24px;background:#fff}.tool-input,textarea,input,select{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit;background:#fff;color:var(--text)}textarea.tool-input{min-height:210px;resize:vertical}.tool-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:14px 0}.tool-row.three{grid-template-columns:repeat(3,1fr)}.tool-actions{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}.result-box{background:var(--soft);border:1px solid #cfe0ff;border-radius:14px;padding:16px}.result-box b{display:block;font-size:24px}.result-box span{font-size:13px;color:var(--muted)}.output-box{background:#0f172a;color:#e2e8f0;border-radius:14px;padding:16px;white-space:pre-wrap;overflow:auto;min-height:80px}.status-ok{color:var(--ok);font-weight:700}.status-warn{color:#b54708;font-weight:700}.status-bad{color:var(--danger);font-weight:700}.faq{border-top:1px solid var(--line);padding:12px 0}.faq summary{font-weight:700;cursor:pointer}.article-content{font-size:17px}.article-content h2{margin-top:28px}.article-content p{margin:0 0 16px}.contact-form{display:grid;gap:14px}.notice{border-radius:14px;padding:14px 16px;margin-bottom:16px;background:#ecfdf3;border:1px solid #abefc6;color:#065f46}.notice.error{background:#fff1f2;border-color:#fecdd3;color:#9f1239}.ad-slot{margin:24px 0;padding:16px;border:1px dashed var(--line);border-radius:14px;text-align:center;color:var(--muted);background:#fff}.site-footer{border-top:1px solid var(--line);background:#fff;margin-top:40px;padding:38px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:26px}.footer-grid a{display:block;color:var(--muted);font-size:14px;margin:8px 0}.footer-grid h3{margin:0 0 10px;font-size:16px}.footer-bottom{border-top:1px solid var(--line);margin-top:24px;padding-top:18px;color:var(--muted);font-size:14px}.admin-wrap{display:grid;grid-template-columns:230px 1fr;min-height:100vh}.admin-sidebar{background:#0f172a;color:#e2e8f0;padding:24px}.admin-sidebar a{display:block;padding:10px 12px;border-radius:10px;color:#cbd5e1}.admin-sidebar a:hover{background:#1e293b;color:#fff}.admin-main{padding:28px}.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.admin-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.admin-table th,.admin-table td{border-bottom:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}.admin-table th{background:#f8fafc}.form-grid{display:grid;gap:14px}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#e8f1ff,#f8fafc)}.login-card{width:min(430px,92%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:0 20px 50px rgba(15,23,42,.08)}.badge{display:inline-flex;padding:4px 9px;border-radius:999px;background:#eef4ff;color:#1d4ed8;font-size:12px;font-weight:700}.file-note{font-size:13px;color:var(--muted);margin-top:8px}
@media(max-width:900px){.main-nav{display:none;position:absolute;top:68px;left:4%;right:4%;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:0 20px 40px rgba(15,23,42,.08)}.main-nav.open{display:grid}.nav-toggle{display:block}.category-grid,.tool-grid,.guide-grid,.small-grid{grid-template-columns:1fr}.content-layout{grid-template-columns:1fr}.sidebar{position:static}.result-grid,.tool-row,.tool-row.three{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.admin-wrap{grid-template-columns:1fr}.admin-sidebar{position:static}.admin-main{padding:18px}.section-head{display:block}}