/* ===== CSS变量:雷蛙 Thunderfrog 品牌 ===== */
:root {
  --primary: #00B96B;         /* 蛙绿 */
  --primary-light: #16C77E;
  --accent: #F5A623;          /* 雷电黄 */
  --accent-light: #FFC53D;
  --teal: #00C4B4;
  --bg: #16171D;
  --bg-card: #1E1F26;
  --bg-elevated: #2A2C36;
  --text: #E6E6EB;
  --text-secondary: #9EA1AC;
  --text-dim: #6B6E7A;
  --border: #2E3038;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --font: system-ui, -apple-system, 'Segoe UI', 'Microsoft YaHei', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;
  --transition: all 0.3s ease;
}

[data-theme="light"] {
  --bg: #F7F8FA;
  --bg-card: #FFFFFF;
  --bg-elevated: #F1F3F5;
  --text: #1D2129;
  --text-secondary: #4E5969;
  --text-dim: #86909C;
  --border: #E5E6EB;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ===== 基础样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0; background: transparent; transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(22, 23, 29, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(46, 48, 56, 0.6); padding: 10px 0;
}
[data-theme="light"] .navbar.scrolled {
  background: rgba(247, 248, 250, 0.85); border-bottom-color: rgba(229, 230, 235, 0.8);
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 700; color: var(--text); }
.nav-logo:hover { color: var(--text); }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle {
  background: none; border: none; cursor: pointer; color: var(--text-secondary);
  padding: 6px; border-radius: 8px; display: flex;
}
.theme-toggle:hover { color: var(--text); background: var(--bg-elevated); }
.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
.mobile-menu { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-menu span { display: block; width: 20px; height: 2px; background: var(--text-secondary); margin: 4px 0; transition: var(--transition); }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0, 185, 107, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(245, 166, 35, 0.10) 0%, transparent 50%);
}
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero h1 { font-size: 3.2rem; font-weight: 800; line-height: 1.15; margin-bottom: 20px; }
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 50%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 32px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 10px; font-size: 0.95rem; font-weight: 600; transition: var(--transition); cursor: pointer; border: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--teal)); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0, 185, 107, 0.4); color: #fff; }
.btn-glow { box-shadow: 0 0 20px rgba(0, 185, 107, 0.3); }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 应用窗口(通用外框) ===== */
.app-window {
  background: #1a1c24; border-radius: 12px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45); border: 1px solid rgba(255,255,255,0.05);
}
.win-header { background: #23252f; padding: 10px 16px; display: flex; align-items: center; gap: 12px; }
.win-dots { display: flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #FF5F57; } .dot.yellow { background: #FEBC2E; } .dot.green { background: #28C840; }
.win-title { color: #888; font-size: 0.8rem; font-family: var(--font-mono); }

/* Hero 查询窗口 */
.query-body { padding: 0; font-family: var(--font-mono); font-size: 0.82rem; min-height: 260px; display: flex; flex-direction: column; }
.query-editor { padding: 16px; color: #E2E8F0; border-bottom: 1px solid #2a2c38; min-height: 120px; }
.query-editor .kw { color: #16C77E; }
.query-editor .fn { color: #F5A623; }
.query-editor .str { color: #7FD1B9; }
.query-editor .cursor { animation: blink 1s infinite; color: var(--accent); }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.query-result { flex: 1; overflow: hidden; }
.result-grid { width: 100%; border-collapse: collapse; font-size: 0.72rem; }
.result-grid th { background: #23252f; color: #9EA1AC; text-align: left; padding: 6px 12px; font-weight: 600; border-bottom: 1px solid #2a2c38; }
.result-grid td { padding: 6px 12px; color: #C9CDD4; border-bottom: 1px solid #23252f; }
.result-grid .pk { color: #F5A623; }
.result-grid .null { color: #5F6270; font-style: italic; }
.result-status { padding: 6px 12px; font-size: 0.72rem; color: #16C77E; background: #1e202a; }

/* ===== 区块 ===== */
.features, .showcase, .tech, .download { padding: 100px 0; }
.section-title { font-size: 2.2rem; font-weight: 800; text-align: center; margin-bottom: 12px; }
.section-desc { text-align: center; color: var(--text-secondary); margin-bottom: 48px; font-size: 1.05rem; }

/* ===== 功能区 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; transition: var(--transition); position: relative; overflow: hidden; }
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--primary), var(--accent)); opacity: 0; transition: var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary); }
.feature-card:hover::before { opacity: 1; }
.feature-icon { width: 48px; height: 48px; border-radius: 10px; background: rgba(0, 185, 107, 0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; color: var(--primary-light); }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* ===== 产品展示 ===== */
.showcase-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 32px; }
.tab-btn { padding: 8px 20px; border: 1px solid var(--border); border-radius: 8px; background: transparent; color: var(--text-secondary); cursor: pointer; font-size: 0.9rem; transition: var(--transition); }
.tab-btn.active, .tab-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.showcase-panel { display: none; }
.showcase-panel.active { display: block; }

/* 模拟数据库管理界面 */
.mock-db { display: flex; min-height: 360px; font-family: var(--font); }
.mock-tree { width: 220px; background: #17181d; padding: 12px; border-right: 1px solid #2a2c38; font-size: 0.78rem; }
.mock-tree-search { background: #23252f; border-radius: 6px; padding: 6px 10px; color: #6B6E7A; font-size: 0.72rem; margin-bottom: 10px; }
.mock-node { padding: 5px 8px; border-radius: 5px; color: #9EA1AC; display: flex; align-items: center; gap: 7px; }
.mock-node.indent { padding-left: 20px; }
.mock-node.indent2 { padding-left: 34px; }
.mock-node.active { background: rgba(0, 185, 107, 0.14); color: #E6E6EB; }
.mock-node .tdot { width: 7px; height: 7px; border-radius: 50%; background: #00B96B; flex-shrink: 0; }
.mock-node .tdot.gray { background: #4E5969; }
.mock-db-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.mock-db-tabs { display: flex; background: #1e202a; border-bottom: 1px solid #2a2c38; }
.mock-db-tab { padding: 8px 16px; font-size: 0.78rem; color: #9EA1AC; border-bottom: 2px solid transparent; }
.mock-db-tab.active { color: #E6E6EB; border-bottom-color: var(--primary); }
.mock-grid-wrap { flex: 1; overflow: auto; }
.mock-grid { width: 100%; border-collapse: collapse; font-size: 0.75rem; }
.mock-grid th { position: sticky; top: 0; background: #23252f; color: #9EA1AC; text-align: left; padding: 7px 12px; font-weight: 600; border-bottom: 1px solid #2a2c38; white-space: nowrap; }
.mock-grid td { padding: 7px 12px; color: #C9CDD4; border-bottom: 1px solid #23252f; white-space: nowrap; }
.mock-grid tr:hover td { background: rgba(0, 185, 107, 0.05); }
.mock-grid .pk { color: #F5A623; }
.mock-grid .null { color: #5F6270; font-style: italic; }
.mock-grid .edit { background: rgba(245, 166, 35, 0.18); border-radius: 3px; }
.mock-db-status { padding: 6px 12px; font-size: 0.72rem; color: #9EA1AC; background: #1e202a; border-top: 1px solid #2a2c38; display: flex; gap: 16px; }
.mock-db-status .ok { color: #16C77E; }

/* 表设计器 mock */
.mock-designer { padding: 16px; min-height: 360px; }
.mock-designer .dz-toolbar { display: flex; gap: 8px; margin-bottom: 12px; }
.mock-designer .dz-btn { padding: 5px 12px; background: #23252f; border-radius: 6px; font-size: 0.75rem; color: #9EA1AC; }
.mock-designer .dz-btn.pri { background: rgba(0,185,107,.16); color: #16C77E; }

/* ===== 技术架构 ===== */
.tech { background: var(--bg-card); }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.tech-card { text-align: center; padding: 40px 24px; border-radius: var(--radius); background: var(--bg); border: 1px solid var(--border); transition: var(--transition); }
.tech-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.tech-label { font-size: 0.7rem; text-transform: uppercase; color: var(--accent); font-weight: 700; letter-spacing: 2px; margin-bottom: 8px; }
.tech-name { font-size: 1.3rem; font-weight: 800; margin-bottom: 12px; }
.tech-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* ===== 下载 ===== */
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 24px; }
.download-card { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 32px 20px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--border); color: var(--text); transition: var(--transition); }
.download-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); color: var(--text); }
.download-card.soon { opacity: 0.72; }
.download-card svg { color: var(--text-secondary); }
.dl-platform { font-size: 1.1rem; font-weight: 700; }
.dl-info { font-size: 0.8rem; color: var(--text-dim); text-align: center; }
.dl-btn { padding: 8px 20px; border-radius: 8px; font-size: 0.85rem; font-weight: 600; background: linear-gradient(135deg, var(--primary), var(--teal)); color: #fff; }
.dl-btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.version-info { text-align: center; color: var(--text-dim); font-size: 0.85rem; }

/* ===== 页脚 ===== */
.footer { padding: 60px 0 0; border-top: 1px solid var(--border); }
.footer-content { display: flex; justify-content: space-between; gap: 40px; }
.footer-brand p { color: var(--text-dim); font-size: 0.9rem; margin-top: 8px; }
.footer-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; }
.footer-links { display: flex; gap: 60px; }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.footer-col a { display: block; color: var(--text-dim); font-size: 0.85rem; margin-bottom: 8px; }
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom { margin-top: 40px; padding: 20px 0; border-top: 1px solid var(--border); text-align: center; color: var(--text-dim); font-size: 0.8rem; }
.footer-bottom p { margin: 4px 0; }

/* ===== 子页面通用 ===== */
.subpage { padding-top: 120px; padding-bottom: 60px; min-height: 70vh; }
.subpage h1.section-title { text-align: left; }
.doc-block { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; margin-bottom: 20px; }
.doc-block h3 { font-size: 1.1rem; margin-bottom: 12px; }
.doc-block p, .doc-block li { color: var(--text-secondary); font-size: 0.92rem; margin-bottom: 8px; }
.doc-block ul, .doc-block ol { padding-left: 20px; }
pre { background: #16171d; border: 1px solid var(--border); border-radius: 8px; padding: 16px; overflow-x: auto; font-family: var(--font-mono); font-size: 0.82rem; color: #C9CDD4; margin: 12px 0; }
[data-theme="light"] pre { background: #1e1f26; color: #E6E6EB; }
code { font-family: var(--font-mono); font-size: 0.85em; color: var(--primary-light); }