/* ==================== QuickQ 全局样式 ==================== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --secondary: #7c3aed;
  --accent: #06b6d4;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --green: #10b981;
  --orange: #f59e0b;
  --red: #ef4444;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.12), 0 8px 32px rgba(0,0,0,.06);
  --transition: all .25s ease;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body {
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px; line-height:1.7; color:var(--gray-700); background:#fff;
  -webkit-font-smoothing:antialiased;
}
img { max-width:100%; height:auto; display:block; }
a { color:var(--primary); text-decoration:none; transition:var(--transition); }
a:hover { color:var(--primary-dark); }
ul,ol { list-style:none; }
button { cursor:pointer; border:none; background:none; font:inherit; }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ==================== 工具类 ==================== */
.text-gradient {
  background:linear-gradient(135deg,var(--primary-light),var(--accent));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.section { padding:80px 0; }
.section-header { text-align:center; margin-bottom:48px; }
.section-tag {
  display:inline-block; font-size:13px; font-weight:600; color:var(--primary);
  background:rgba(37,99,235,.08); padding:4px 14px; border-radius:20px; margin-bottom:12px;
}
.section-title { font-size:32px; font-weight:800; color:var(--gray-900); margin-bottom:12px; line-height:1.3; }
.section-desc { font-size:16px; color:var(--gray-500); max-width:680px; margin:0 auto; }

.alt-bg { background:var(--gray-50); }

/* ==================== 按钮 ==================== */
.btn-primary {
  display:inline-block; background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff; font-weight:600; font-size:15px; padding:12px 28px; border-radius:var(--radius);
  box-shadow:0 4px 14px rgba(37,99,235,.3); transition:var(--transition); text-align:center;
}
.btn-primary:hover { color:#fff; transform:translateY(-2px); box-shadow:0 6px 20px rgba(37,99,235,.4); }
.btn-outline {
  display:inline-block; border:2px solid var(--primary); color:var(--primary);
  font-weight:600; font-size:15px; padding:10px 26px; border-radius:var(--radius); transition:var(--transition);
}
.btn-outline:hover { background:var(--primary); color:#fff; }
.btn-lg { padding:14px 36px; font-size:16px; }
.btn-download-top {
  display:inline-block; background:var(--primary); color:#fff; font-weight:600; font-size:14px;
  padding:8px 20px; border-radius:8px; transition:var(--transition);
}
.btn-download-top:hover { background:var(--primary-dark); color:#fff; }

/* ==================== 顶部通知栏 ==================== */
.top-banner { background:var(--dark); color:var(--gray-300); font-size:13px; padding:8px 0; text-align:center; }
.top-banner .container { display:flex; justify-content:center; align-items:center; }
.top-banner span { display:inline-block; }

/* ==================== 导航栏 ==================== */
.site-header {
  position:sticky; top:0; z-index:100; background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px); border-bottom:1px solid var(--gray-100); transition:var(--transition);
}
.nav-container { display:flex; align-items:center; justify-content:space-between; height:68px; }
.logo-link { display:flex; align-items:center; gap:8px; }
.logo-img { width:36px; height:36px; border-radius:8px; }
.logo-text { font-size:22px; font-weight:800; color:var(--gray-900); letter-spacing:-.5px; }
.main-nav { flex:1; display:flex; justify-content:center; }
.nav-list { display:flex; gap:8px; }
.nav-link {
  display:block; padding:8px 14px; font-size:14px; font-weight:500; color:var(--gray-600);
  border-radius:8px; transition:var(--transition);
}
.nav-link:hover { color:var(--primary); background:rgba(37,99,235,.05); }
.nav-link.active { color:var(--primary); background:rgba(37,99,235,.08); font-weight:600; }
.header-actions { display:flex; align-items:center; gap:12px; }
.mobile-menu-toggle { display:none; flex-direction:column; gap:4px; padding:8px; }
.mobile-menu-toggle span { width:22px; height:2px; background:var(--gray-700); border-radius:2px; transition:var(--transition); }

/* ==================== Hero ==================== */
.hero {
  position:relative; padding:100px 0 80px; color:#fff; overflow:hidden;
  background-size:cover; background-position:center; background-repeat:no-repeat;
}
.hero-content { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; position:relative; z-index:2; }
.hero-badge { display:inline-block; background:rgba(255,255,255,.15); border:1px solid rgba(255,255,255,.25); padding:6px 16px; border-radius:20px; font-size:13px; margin-bottom:20px; backdrop-filter:blur(4px); }
.hero-title { font-size:44px; font-weight:900; line-height:1.2; margin-bottom:20px; }
.hero-desc { font-size:17px; color:rgba(255,255,255,.85); margin-bottom:28px; max-width:520px; }
.hero-actions { display:flex; gap:14px; flex-wrap:wrap; margin-bottom:36px; }
.hero-stats { display:flex; gap:32px; flex-wrap:wrap; }
.stat-item { text-align:center; }
.stat-item strong { display:block; font-size:24px; font-weight:800; color:#fff; }
.stat-item span { font-size:12px; color:rgba(255,255,255,.65); }
.hero-visual { display:flex; justify-content:center; }
.hero-devices { max-width:100%; border-radius:var(--radius-lg); box-shadow:0 20px 60px rgba(0,0,0,.3); }

/* ==================== 信任背书 ==================== */
.trust-bar { padding:60px 0; background:var(--gray-50); }
.trust-title { text-align:center; font-size:18px; font-weight:700; color:var(--gray-700); margin-bottom:32px; }
.trust-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.trust-item { text-align:center; padding:20px; }
.trust-icon { font-size:36px; margin-bottom:12px; }
.trust-item h3 { font-size:16px; font-weight:700; color:var(--gray-900); margin-bottom:6px; }
.trust-item p { font-size:13px; color:var(--gray-500); line-height:1.6; }

/* ==================== 场景卡片 ==================== */
.scenarios-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.scenario-card {
  background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius-lg);
  padding:32px 28px; transition:var(--transition); position:relative; overflow:hidden;
}
.scenario-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:rgba(37,99,235,.15); }
.scenario-icon { font-size:40px; margin-bottom:16px; }
.scenario-card h3 { font-size:19px; font-weight:700; color:var(--gray-900); margin-bottom:10px; }
.scenario-card p { font-size:14px; color:var(--gray-500); margin-bottom:16px; line-height:1.7; }
.card-link { font-size:14px; font-weight:600; color:var(--primary); }

/* ==================== 教程步骤 ==================== */
.tutorial-steps { max-width:760px; margin:0 auto; }
.step-item {
  display:flex; gap:20px; margin-bottom:28px; padding:24px; background:#fff;
  border:1px solid var(--gray-100); border-radius:var(--radius); transition:var(--transition);
}
.step-item:hover { box-shadow:var(--shadow); }
.step-number {
  flex-shrink:0; background:linear-gradient(135deg,var(--primary),var(--secondary)); color:#fff;
  font-weight:700; font-size:14px; padding:8px 16px; border-radius:8px; height:fit-content; white-space:nowrap;
}
.step-content h3 { font-size:17px; font-weight:700; color:var(--gray-900); margin-bottom:6px; }
.step-content p { font-size:14px; color:var(--gray-500); line-height:1.7; }
.tutorial-more { text-align:center; margin-top:32px; }

/* ==================== 下载 ==================== */
.download-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.download-card {
  display:block; text-align:center; padding:28px 20px; background:#fff; border:1px solid var(--gray-100);
  border-radius:var(--radius-lg); transition:var(--transition);
}
.download-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:rgba(37,99,235,.2); }
.dl-icon { font-size:42px; margin-bottom:12px; }
.download-card h3 { font-size:17px; font-weight:700; color:var(--gray-900); margin-bottom:4px; }
.download-card p { font-size:13px; color:var(--gray-400); margin-bottom:10px; }
.dl-version { font-size:12px; color:var(--primary); font-weight:600; }

/* ==================== 功能特性 ==================== */
.features-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.feature-card {
  padding:28px; background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius-lg);
  transition:var(--transition);
}
.feature-card:hover { box-shadow:var(--shadow); border-color:rgba(37,99,235,.12); }
.feature-icon { font-size:36px; margin-bottom:14px; }
.feature-card h3 { font-size:17px; font-weight:700; color:var(--gray-900); margin-bottom:8px; }
.feature-card p { font-size:14px; color:var(--gray-500); line-height:1.7; }

/* ==================== FAQ ==================== */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius); margin-bottom:12px; overflow:hidden; transition:var(--transition); }
.faq-item[open] { box-shadow:var(--shadow); border-color:rgba(37,99,235,.15); }
.faq-item summary { padding:18px 24px; cursor:pointer; list-style:none; }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary h3 { font-size:15px; font-weight:600; color:var(--gray-900); position:relative; padding-right:24px; }
.faq-item summary h3::after { content:"+"; position:absolute; right:0; top:50%; transform:translateY(-50%); font-size:20px; color:var(--gray-400); font-weight:400; }
.faq-item[open] summary h3::after { content:"−"; }
.faq-body { padding:0 24px 20px; }
.faq-body p { font-size:14px; color:var(--gray-500); line-height:1.7; }
.faq-more { text-align:center; margin-top:28px; }

/* ==================== CTA ==================== */
.cta-section { padding:60px 0; }
.cta-box {
  background:linear-gradient(135deg,var(--primary),var(--secondary)); color:#fff;
  border-radius:var(--radius-lg); padding:48px 32px; text-align:center;
}
.cta-box h2 { font-size:28px; font-weight:800; margin-bottom:12px; }
.cta-box p { font-size:16px; opacity:.85; margin-bottom:24px; }
.cta-box .btn-primary { background:#fff; color:var(--primary); box-shadow:0 4px 14px rgba(255,255,255,.25); }
.cta-box .btn-primary:hover { background:var(--gray-100); transform:translateY(-2px); }
.cta-actions { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; }

/* ==================== 页脚 ==================== */
.site-footer { background:var(--dark); color:var(--gray-400); padding:48px 0 0; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:32px; padding-bottom:36px; }
.footer-brand { display:flex; flex-direction:column; gap:10px; }
.footer-brand { flex-direction:row; align-items:center; gap:10px; flex-wrap:wrap; }
.footer-logo { width:32px; height:32px; border-radius:6px; }
.footer-brand-name { font-size:20px; font-weight:800; color:#fff; }
.footer-desc { font-size:13px; color:var(--gray-400); max-width:280px; margin-top:4px; }
.footer-col h4 { font-size:14px; font-weight:700; color:#fff; margin-bottom:14px; }
.footer-col ul { display:flex; flex-direction:column; gap:8px; }
.footer-col a { font-size:13px; color:var(--gray-400); }
.footer-col a:hover { color:var(--primary-light); }
.footer-bottom { border-top:1px solid rgba(255,255,255,.08); padding:20px 0; text-align:center; font-size:12px; color:var(--gray-500); }

/* ==================== 页面标题区 ==================== */
.page-hero { padding:56px 0 40px; background:linear-gradient(135deg,var(--gray-50),#fff); border-bottom:1px solid var(--gray-100); }
.breadcrumb { font-size:13px; color:var(--gray-400); margin-bottom:16px; }
.breadcrumb a { color:var(--gray-400); }
.breadcrumb a:hover { color:var(--primary); }
.breadcrumb span { margin:0 8px; }
.page-title { font-size:36px; font-weight:900; color:var(--gray-900); margin-bottom:12px; }
.page-subtitle { font-size:16px; color:var(--gray-500); max-width:700px; }

/* ==================== 下载页专属 ==================== */
.download-cards-large { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; margin-bottom:48px; }
.dl-card-large {
  display:flex; align-items:center; gap:20px; padding:24px; background:#fff;
  border:1px solid var(--gray-100); border-radius:var(--radius-lg); transition:var(--transition);
}
.dl-card-large:hover { box-shadow:var(--shadow-lg); border-color:rgba(37,99,235,.15); }
.dl-card-icon { font-size:44px; flex-shrink:0; }
.dl-card-info { flex:1; }
.dl-card-info h3 { font-size:18px; font-weight:700; color:var(--gray-900); margin-bottom:4px; }
.dl-card-desc { font-size:13px; color:var(--gray-400); margin-bottom:8px; }
.dl-card-meta { display:flex; gap:16px; flex-wrap:wrap; }
.dl-card-meta li { font-size:12px; color:var(--gray-500); }

.env-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.env-card { background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius); padding:24px; }
.env-card h3 { font-size:16px; font-weight:700; color:var(--gray-900); margin-bottom:14px; }
.env-table { width:100%; }
.env-table td { font-size:13px; padding:6px 0; border-bottom:1px solid var(--gray-100); color:var(--gray-500); }
.env-table td:first-child { color:var(--gray-700); font-weight:500; width:35%; }

.troubleshoot-list { max-width:840px; margin:0 auto; }
.ts-item { background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius); margin-bottom:12px; overflow:hidden; }
.ts-item summary { padding:18px 24px; cursor:pointer; list-style:none; }
.ts-item summary::-webkit-details-marker { display:none; }
.ts-item summary h3 { font-size:15px; font-weight:600; color:var(--gray-900); position:relative; padding-right:24px; }
.ts-item summary h3::after { content:"+"; position:absolute; right:0; top:50%; transform:translateY(-50%); font-size:20px; color:var(--gray-400); }
.ts-item[open] summary h3::after { content:"−"; }
.ts-body { padding:0 24px 20px; }
.ts-body p { font-size:14px; color:var(--gray-500); margin-bottom:8px; }
.ts-body strong { color:var(--gray-700); }
.ts-steps { padding-left:20px; }
.ts-steps li { font-size:14px; color:var(--gray-500); line-height:1.8; padding-left:4px; }

/* ==================== 教程页专属 ==================== */
.platform-tabs { display:flex; gap:8px; justify-content:center; margin-bottom:32px; flex-wrap:wrap; }
.platform-tab {
  padding:10px 24px; border-radius:var(--radius); font-weight:600; font-size:14px;
  background:var(--gray-100); color:var(--gray-600); transition:var(--transition);
}
.platform-tab.active { background:var(--primary); color:#fff; }
.platform-tab:hover:not(.active) { background:var(--gray-200); }
.platform-panel { display:none; }
.platform-panel.active { display:block; }
.detail-steps { padding-left:20px; max-width:760px; margin:0 auto 20px; }
.detail-steps li { font-size:14px; color:var(--gray-500); line-height:1.8; padding-left:4px; margin-bottom:6px; }
.tip-box { background:rgba(37,99,235,.05); border-left:4px solid var(--primary); padding:14px 18px; border-radius:0 var(--radius) var(--radius) 0; font-size:14px; color:var(--gray-600); max-width:760px; margin:0 auto; }

.verify-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.verify-card { background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius); padding:24px; text-align:center; }
.verify-card h3 { font-size:16px; font-weight:700; color:var(--gray-900); margin-bottom:8px; }
.verify-card p { font-size:13px; color:var(--gray-500); line-height:1.7; }

/* ==================== 场景页专属 ==================== */
.scenario-detail-header { display:flex; gap:20px; align-items:flex-start; margin-bottom:32px; }
.scenario-detail-icon { font-size:48px; flex-shrink:0; }
.scenario-detail-header .section-tag { margin-bottom:8px; }
.scenario-detail-header h2 { font-size:28px; font-weight:800; color:var(--gray-900); margin-bottom:8px; }
.scenario-detail-header p { font-size:15px; color:var(--gray-500); }
.scenario-content h3 { font-size:18px; font-weight:700; color:var(--gray-900); margin-bottom:10px; }
.scenario-content p { font-size:14px; color:var(--gray-500); line-height:1.8; margin-bottom:16px; }
.compare-table-wrap { overflow-x:auto; }
.compare-table { width:100%; border-collapse:collapse; background:#fff; border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); }
.compare-table th { background:var(--primary); color:#fff; font-size:14px; font-weight:600; padding:14px 16px; text-align:left; }
.compare-table td { font-size:14px; padding:14px 16px; border-bottom:1px solid var(--gray-100); color:var(--gray-600); }
.compare-table tr:last-child td { border-bottom:none; }
.compare-table tr:nth-child(even) td { background:var(--gray-50); }

/* ==================== FAQ 页专属 ==================== */
.faq-cat-nav { display:flex; gap:8px; justify-content:center; margin-bottom:36px; flex-wrap:wrap; }
.faq-cat-btn { padding:10px 22px; border-radius:var(--radius); font-weight:600; font-size:14px; background:var(--gray-100); color:var(--gray-600); transition:var(--transition); }
.faq-cat-btn.active, .faq-cat-btn:hover { background:var(--primary); color:#fff; }
.faq-cat-section { margin-bottom:40px; }
.faq-cat-title { font-size:20px; font-weight:700; color:var(--gray-900); margin-bottom:16px; padding-bottom:8px; border-bottom:2px solid var(--gray-100); }

/* ==================== 关于页专属 ==================== */
.about-grid { display:grid; grid-template-columns:1.5fr 1fr; gap:48px; align-items:start; }
.about-text h2 { font-size:24px; font-weight:800; color:var(--gray-900); margin:24px 0 12px; }
.about-text h2:first-child { margin-top:0; }
.about-text p { font-size:15px; color:var(--gray-500); line-height:1.8; margin-bottom:14px; }
.about-principles { padding-left:0; }
.about-principles li { font-size:14px; color:var(--gray-500); line-height:1.8; padding-left:0; margin-bottom:8px; }
.about-stats { display:flex; flex-direction:column; gap:16px; position:sticky; top:88px; }
.about-stat-card { background:linear-gradient(135deg,var(--primary),var(--secondary)); color:#fff; border-radius:var(--radius-lg); padding:28px; text-align:center; }
.about-stat-card strong { display:block; font-size:36px; font-weight:900; }
.about-stat-card span { font-size:13px; opacity:.85; }
.values-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.value-card { background:#fff; border:1px solid var(--gray-100); border-radius:var(--radius-lg); padding:28px; }
.value-card h3 { font-size:17px; font-weight:700; color:var(--gray-900); margin-bottom:8px; }
.value-card p { font-size:14px; color:var(--gray-500); line-height:1.7; }

/* ==================== 响应式 ==================== */
@media (max-width:900px) {
  .hero-content { grid-template-columns:1fr; }
  .hero-title { font-size:32px; }
  .hero-visual { order:-1; }
  .trust-grid { grid-template-columns:repeat(2,1fr); }
  .scenarios-grid { grid-template-columns:repeat(2,1fr); }
  .features-grid { grid-template-columns:repeat(2,1fr); }
  .download-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .about-grid { grid-template-columns:1fr; }
  .about-stats { flex-direction:row; flex-wrap:wrap; position:static; }
  .verify-grid { grid-template-columns:1fr; }
  .values-grid { grid-template-columns:1fr; }
  .env-grid { grid-template-columns:1fr; }
  .download-cards-large { grid-template-columns:1fr; }
  .compare-table { font-size:12px; }
}
@media (max-width:640px) {
  .container { padding:0 16px; }
  .section { padding:56px 0; }
  .section-title { font-size:24px; }
  .page-title { font-size:28px; }
  .hero { padding:60px 0 48px; }
  .hero-title { font-size:26px; }
  .hero-stats { gap:20px; }
  .stat-item strong { font-size:20px; }
  .main-nav { display:none; position:absolute; top:68px; left:0; right:0; background:#fff; flex-direction:column; padding:16px; box-shadow:var(--shadow-lg); border-top:1px solid var(--gray-100); }
  .main-nav.open { display:flex; }
  .nav-list { flex-direction:column; width:100%; gap:4px; }
  .mobile-menu-toggle { display:flex; }
  .trust-grid { grid-template-columns:1fr; }
  .scenarios-grid { grid-template-columns:1fr; }
  .features-grid { grid-template-columns:1fr; }
  .download-grid { grid-template-columns:repeat(2,1fr); gap:12px; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
  .step-item { flex-direction:column; gap:12px; }
  .dl-card-large { flex-direction:column; text-align:center; }
  .scenario-detail-header { flex-direction:column; gap:12px; }
  .compare-table th, .compare-table td { padding:10px 8px; font-size:11px; }
}