:root{
  --bg:#f4f6fb; --card:rgba(255,255,255,.72); --border:rgba(255,255,255,.65);
  --text:#1d2433; --muted:#6b7280; --primary:#3b82f6; --primary2:#8b5cf6;
  --grad:linear-gradient(135deg,#3b82f6,#8b5cf6); --radius:18px;
  --shadow:0 8px 32px rgba(31,41,55,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;line-height:1.7}
a{text-decoration:none;color:var(--primary)}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.glass{background:var(--card);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);
  border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}

/* 背景光球 */
.bg-orb{position:fixed;border-radius:50%;filter:blur(90px);opacity:.35;z-index:-1;pointer-events:none}
.orb-a{width:480px;height:480px;background:#93c5fd;top:-140px;left:-120px}
.orb-b{width:420px;height:420px;background:#c4b5fd;bottom:-120px;right:-100px}

/* 头部 */
.site-header{position:sticky;top:12px;z-index:50;margin:12px auto 0;max-width:1080px;border-radius:16px}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 22px}
.logo{font-size:18px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px}
.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--grad);box-shadow:0 0 12px #3b82f6}
.nav{display:flex;gap:22px;align-items:center}
.nav a{color:var(--muted);font-size:14.5px;transition:.2s}
.nav a:hover{color:var(--primary)}
.nav-admin{padding:7px 16px;border-radius:999px;background:var(--grad);color:#fff !important;font-weight:600}

/* Hero */
.hero{text-align:center;padding:64px 0 30px}
.hero-badge{display:inline-block;padding:7px 18px;border-radius:999px;font-size:13px;color:var(--primary);
  background:rgba(59,130,246,.08);border:1px solid rgba(59,130,246,.2);margin-bottom:22px}
.hero h1{font-size:clamp(34px,5.5vw,54px);font-weight:800;letter-spacing:-1px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:640px;margin:16px auto 34px;color:var(--muted);font-size:16px}

/* 工具卡片 */
.tool-card{max-width:820px;margin:0 auto;padding:26px;text-align:left}
.url-row{display:flex;gap:10px;flex-wrap:wrap}
.proto-select{position:relative}
.proto-select select{appearance:none;-webkit-appearance:none;height:52px;padding:0 36px 0 16px;border-radius:13px;
  border:1px solid rgba(59,130,246,.3);background:rgba(59,130,246,.06);color:var(--primary);font-size:15px;font-weight:600;cursor:pointer;outline:none}
.proto-arrow{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--primary);font-size:12px;pointer-events:none}
#target{flex:1;min-width:220px;height:52px;border-radius:13px;border:1px solid #e2e8f0;padding:0 18px;font-size:15px;outline:none;transition:.2s;background:#fff}
#target:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:52px;padding:0 26px;border:none;border-radius:13px;
  background:var(--grad);color:#fff;font-size:15.5px;font-weight:600;cursor:pointer;transition:.25s;box-shadow:0 6px 18px rgba(91,124,250,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(91,124,250,.45)}
.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-block{width:100%;margin-top:8px}
.tool-extra{margin-top:14px}
.tool-extra summary{cursor:pointer;color:var(--muted);font-size:14px;user-select:none}
.tool-extra textarea{width:100%;margin-top:10px;border-radius:13px;border:1px solid #e2e8f0;padding:12px 16px;font-size:14px;outline:none;resize:vertical;background:#fff}
.tool-extra textarea:focus{border-color:var(--primary)}

/* 进度与日志 */
.progress-wrap{margin-top:20px}
.progress-bar{height:10px;border-radius:99px;background:rgba(59,130,246,.12);overflow:hidden}
.progress-fill{height:100%;width:0;border-radius:99px;background:var(--grad);transition:width .3s}
.progress-text{margin-top:8px;font-size:13.5px;color:var(--muted)}
.progress-text span:first-child{color:var(--primary);font-weight:700}
.result-stats{margin-top:16px;padding:14px 18px;border-radius:13px;background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.25);color:#047857;font-size:14.5px}
.log-panel{max-width:820px;margin:18px auto 0;padding:18px 22px;text-align:left;max-height:280px;overflow-y:auto}
.log-title{font-weight:700;font-size:14px;margin-bottom:10px;color:var(--muted)}
#logList{list-style:none;font-size:13px;color:var(--muted)}
#logList li{padding:4px 0;border-bottom:1px dashed rgba(0,0,0,.05);animation:fadeIn .3s}
#logList li b{color:var(--primary);font-weight:600}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1}}

/* 区块 */
.section-title{font-size:26px;font-weight:800;text-align:center;margin:56px 0 26px;letter-spacing:.5px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.feature-card{padding:26px 22px;transition:.25s}
.feature-card:hover{transform:translateY(-5px)}
.fc-icon{font-size:30px;margin-bottom:12px}
.feature-card h3{font-size:16.5px;margin-bottom:8px}
.feature-card p{font-size:13.8px;color:var(--muted)}

/* 文章 */
.article-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.article-item{display:block;padding:20px 22px;color:var(--text);transition:.25s}
.article-item:hover{transform:translateY(-4px);border-color:rgba(59,130,246,.4)}
.ai-title{font-size:16px;font-weight:700;margin-bottom:8px}
.ai-meta{font-size:12.8px;color:var(--muted)}
.empty{text-align:center;color:var(--muted);padding:30px}

/* 文章详情 */
.article-page{max-width:800px;margin:40px auto;padding:40px}
.article-title{font-size:28px;margin-bottom:10px}
.article-body{margin-top:24px;font-size:15.5px;color:#374151}
.article-body p{margin-bottom:14px}
.article-back{margin-top:34px}

/* 页脚 */
.site-footer{margin-top:70px;padding:30px 0;text-align:center;color:var(--muted);font-size:13.5px}
.friend-links{margin-bottom:14px;display:flex;flex-wrap:wrap;gap:12px;justify-content:center;align-items:center}
.fl-label{font-weight:600}
.friend-links a{color:var(--muted)}
.friend-links a:hover{color:var(--primary)}

/* 登录页 */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.login-card{width:100%;max-width:380px;padding:36px}
.login-logo{font-size:20px;font-weight:800;text-align:center}
.login-sub{text-align:center;color:var(--muted);font-size:13.5px;margin:6px 0 24px}
.login-card label{display:block;font-size:13.5px;color:var(--muted);margin:14px 0 6px}
.login-card input{width:100%;height:46px;border-radius:12px;border:1px solid #e2e8f0;padding:0 14px;font-size:14.5px;outline:none;background:#fff}
.login-card input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.alert-error{margin:0 0 14px;padding:10px 14px;border-radius:11px;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.25);color:#b91c1c;font-size:13.5px}
.alert-ok{margin:0 0 16px;padding:11px 16px;border-radius:11px;background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.25);color:#047857;font-size:14px}

/* 后台 */
.admin-body{display:flex;min-height:100vh}
.admin-sidebar{width:220px;flex-shrink:0;margin:16px 0 16px 16px;padding:22px 14px;position:sticky;top:16px;height:calc(100vh - 32px);align-self:flex-start}
.admin-logo{font-size:17px;font-weight:800;padding:0 10px 18px;border-bottom:1px solid rgba(0,0,0,.06);margin-bottom:14px}
.admin-sidebar nav{display:flex;flex-direction:column;gap:4px}
.admin-sidebar nav a{padding:11px 14px;border-radius:11px;color:var(--muted);font-size:14.5px;transition:.2s}
.admin-sidebar nav a:hover{background:rgba(59,130,246,.08);color:var(--primary)}
.admin-sidebar nav a.active{background:var(--grad);color:#fff;font-weight:600}
.admin-sidebar nav a.logout{margin-top:14px;color:#dc2626}
.admin-main{flex:1;padding:30px 34px;min-width:0}
.admin-page h2{font-size:21px;margin-bottom:18px}
.admin-page-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;flex-wrap:wrap;gap:12px}
.admin-page-head h2{margin:0}
.admin-form{padding:26px;margin-bottom:8px}
.form-group{margin-bottom:16px;flex:1;min-width:180px}
.form-group-sm{max-width:110px}
.form-group label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;border-radius:11px;border:1px solid #e2e8f0;padding:11px 14px;font-size:14.5px;outline:none;background:#fff;font-family:inherit}
.form-group input:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.form-row{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end}
.add-link-form{margin-bottom:22px}
.admin-table{width:100%;border-collapse:collapse;font-size:14px;overflow:hidden}
.admin-table th{text-align:left;padding:13px 16px;font-size:13px;color:var(--muted);border-bottom:1px solid rgba(0,0,0,.06);background:rgba(59,130,246,.04)}
.admin-table td{padding:13px 16px;border-bottom:1px solid rgba(0,0,0,.04)}
.admin-table tr:last-child td{border-bottom:none}
.td-title{font-weight:600;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn-sm{display:inline-block;padding:6px 14px;border-radius:9px;font-size:13px;background:rgba(59,130,246,.1);color:var(--primary);font-weight:600}
.btn-sm:hover{background:rgba(59,130,246,.18)}
.btn-danger{background:rgba(239,68,68,.1) !important;color:#dc2626 !important}
.btn-danger:hover{background:rgba(239,68,68,.2) !important}

@media(max-width:820px){
  .admin-body{flex-direction:column}
  .admin-sidebar{width:auto;margin:12px;height:auto;position:static}
  .admin-sidebar nav{flex-direction:row;flex-wrap:wrap}
  .admin-main{padding:20px 16px}
  .header-inner{flex-direction:column;gap:10px}
  .nav{flex-wrap:wrap;justify-content:center;gap:14px}
}