/* ============================================================
   CDNsync — 全站共享样式表
   设计语言：深蓝绿渐变科技风（参考 Bunny.net / ImageKit / Fastly）
   ============================================================ */

:root {
  --bg: #050b14;
  --bg-2: #0a131f;
  --bg-3: #101c2c;
  --bg-4: #16263a;
  --border: #1e3148;
  --border-2: #284663;
  --text: #f0f9ff;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --cyan: #22d3ee;
  --teal: #14b8a6;
  --emerald: #10b981;
  --accent: #06b6d4;
  --accent-2: #0891b2;
  --green: #10b981;
  --yellow: #facc15;
  --red: #f87171;
  --grad-1: linear-gradient(135deg, #22d3ee 0%, #10b981 100%);
  --grad-2: linear-gradient(135deg, #06b6d4 0%, #14b8a6 50%, #10b981 100%);
  --grad-text: linear-gradient(135deg, #67e8f9, #6ee7b7);
  --max: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
code, pre { font-family: 'JetBrains Mono', 'Menlo', monospace; }
main { flex: 1 0 auto; }

/* 全站背景细节：subtle grid */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(34,211,238,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34,211,238,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none; z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 50%, transparent 100%);
}
nav, main, footer { position: relative; z-index: 1; }

/* ========== 顶部导航 ========== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(5, 11, 20, 0.75);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px;
}
.logo-mark {
  width: 28px; height: 28px;
  background: var(--grad-1);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 800;
  color: #052028;
  box-shadow: 0 0 20px rgba(34,211,238,0.35);
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 14px; transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--cyan); }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px;
  font-size: 14px; font-weight: 500;
  transition: all .2s; border: 1px solid transparent;
  cursor: pointer; font-family: inherit;
}
.btn-primary {
  background: var(--grad-1);
  color: #052028;
  font-weight: 600;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(34,211,238,0.35);
}
.btn-ghost {
  border-color: var(--border-2);
  color: var(--text-2);
  background: transparent;
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(34,211,238,0.05);
}
.btn-lg { padding: 12px 22px; font-size: 15px; }

@media (max-width: 768px) {
  .nav-links a:not(.btn) { display: none; }
}

/* ========== 通用 Section ========== */
section { padding: 80px 24px; }
.container { max-width: var(--max); margin: 0 auto; }
.container-narrow { max-width: 800px; margin: 0 auto; }

.section-title { text-align: center; margin-bottom: 56px; }
.section-title .eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 12px;
}
.section-title h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-title p {
  color: var(--text-2);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto;
}

/* ========== Page Header 通用 ========== */
.page-header {
  padding: 80px 24px 48px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 1000px; height: 400px;
  background:
    radial-gradient(circle at 30% 50%, rgba(34,211,238,0.18), transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(16,185,129,0.15), transparent 50%);
  pointer-events: none; z-index: -1;
}
.page-header h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}
.page-header h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-header .lead {
  max-width: 640px;
  margin: 0 auto;
  font-size: 17px;
  color: var(--text-2);
}

/* ========== 卡片通用 ========== */
.card {
  padding: 28px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all .2s;
}
.card:hover { border-color: var(--cyan); box-shadow: 0 12px 32px rgba(34,211,238,0.08); }

/* ========== Footer ========== */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
  color: var(--text-3);
  font-size: 14px;
  flex-shrink: 0;
  background: var(--bg-2);
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p { margin-top: 12px; max-width: 280px; }
.footer-col h4 {
  color: var(--text); font-size: 13px;
  margin-bottom: 12px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.footer-col a { display: block; padding: 4px 0; transition: color .15s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  max-width: var(--max);
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

/* ========== 表单通用 ========== */
.form-card {
  max-width: 440px;
  margin: 64px auto;
  padding: 40px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.form-card h1 {
  font-size: 28px; font-weight: 700;
  margin-bottom: 8px; text-align: center;
}
.form-card .subtitle {
  text-align: center; color: var(--text-2);
  font-size: 14px; margin-bottom: 32px;
}
.field { margin-bottom: 16px; }
.field label {
  display: block; font-size: 13px; font-weight: 500;
  margin-bottom: 6px; color: var(--text-2);
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.12);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-card .btn { width: 100%; justify-content: center; padding: 11px; }
.form-foot {
  text-align: center; font-size: 14px;
  color: var(--text-2); margin-top: 20px;
}
.form-foot a { color: var(--cyan); }
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}
.alert.show { display: block; }
.alert-success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: #6ee7b7; }
.alert-error { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.3); color: #fca5a5; }
.alert-info { background: rgba(34,211,238,0.1); border: 1px solid rgba(34,211,238,0.3); color: #67e8f9; }

/* ========== 表格通用 ========== */
table.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table.table th, table.table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
table.table th {
  font-weight: 600;
  color: var(--text-2);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-2);
}

/* ========== 状态徽章 ========== */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px; font-weight: 500;
}
.badge-green { background: rgba(16,185,129,0.15); color: #6ee7b7; }
.badge-cyan { background: rgba(34,211,238,0.15); color: #67e8f9; }
.badge-yellow { background: rgba(250,204,21,0.15); color: #fde047; }
.badge-red { background: rgba(248,113,113,0.15); color: #fca5a5; }
.badge-grey { background: var(--bg-3); color: var(--text-2); }
.dot-status {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}

/* ========== Prose ========== */
.prose { color: var(--text-2); font-size: 16px; line-height: 1.75; }
.prose h2 { color: var(--text); font-size: 24px; font-weight: 700; margin: 40px 0 16px; letter-spacing: -0.01em; }
.prose h3 { color: var(--text); font-size: 18px; font-weight: 600; margin: 28px 0 12px; }
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol { margin: 16px 0 16px 24px; }
.prose li { margin-bottom: 6px; }
.prose code {
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: #67e8f9;
}
.prose pre {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
  font-size: 13px;
  line-height: 1.7;
}
.prose pre code { background: none; padding: 0; color: var(--text); }
.prose a { color: var(--cyan); }
.prose a:hover { text-decoration: underline; }
.prose blockquote {
  border-left: 3px solid var(--cyan);
  padding: 8px 16px;
  margin: 20px 0;
  color: var(--text-2);
  background: var(--bg-2);
  border-radius: 0 8px 8px 0;
}

/* ========== 代码 token 高亮 ========== */
.tk-key { color: #67e8f9; }
.tk-str { color: #6ee7b7; }
.tk-num { color: #fda4af; }
.tk-com { color: var(--text-3); font-style: italic; }
.tk-fn  { color: #5eead4; }