/* 乾乐官网主模板 qianle-main 主样式
 * 复用 home/index.vue 视觉风格，CSS 变量读 site_config.primary_color（base.html 注入 --primary-color）
 * 品牌化文案，无 OSS/阿里云/Bucket 字样
 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4F46E5;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --border-color: #E5E7EB;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-color);
  opacity: 0.85;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border-color);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.logo img {
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--text-secondary);
  font-size: 15px;
}

.nav a:hover {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-primary);
}

/* ========== Buttons ========== */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--primary-color);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
  color: #fff;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 14px;
}

.btn-large {
  padding: 14px 32px;
  font-size: 16px;
}

/* ========== Hero ========== */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ========== Section 通用 ========== */
.features,
.why-us,
.scenarios,
.faq-section,
.cta {
  padding: 80px 0;
}

.features h2,
.why-us h2,
.scenarios h2,
.faq-section h2,
.cta h2 {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--text-primary);
}

.section-subtitle {
  text-align: center;
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 720px;
  margin: -32px auto 0;
}

/* ========== Features Grid ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.feature-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* ========== Scenarios ========== */
.scenarios {
  background: var(--bg-secondary);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.scenario-item {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border-left: 4px solid var(--primary-color);
}

.scenario-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.scenario-item p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  padding: 16px 20px;
  transition: box-shadow 0.2s;
}

.faq-item[open] {
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 24px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-size: 20px;
  color: var(--primary-color);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 15px;
}

/* ========== CTA ========== */
.cta {
  background: var(--primary-color);
  text-align: center;
  color: #fff;
}

.cta h2 {
  color: #fff;
  margin-bottom: 16px;
}

.cta p {
  font-size: 18px;
  margin-bottom: 32px;
  opacity: 0.9;
}

.cta .btn-primary {
  background: #fff;
  color: var(--primary-color);
}

.cta .btn-primary:hover {
  opacity: 0.95;
  color: var(--primary-color);
}

/* ========== Article Page ========== */
.article-page {
  padding: 48px 0 80px;
}

.article-header {
  max-width: 800px;
  margin: 0 auto 32px;
  text-align: center;
}

.article-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-meta {
  color: var(--text-secondary);
  font-size: 14px;
}

.article-body {
  max-width: 800px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2,
.article-body h3 {
  margin: 28px 0 14px;
  font-weight: 600;
}

.article-body p {
  margin-bottom: 16px;
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 16px 0;
}

/* ========== List Page (Category/Tag) ========== */
.list-page {
  padding: 48px 0 80px;
}

.list-header {
  text-align: center;
  margin-bottom: 40px;
}

.list-header h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.list-header p {
  color: var(--text-secondary);
}

.list-items {
  max-width: 800px;
  margin: 0 auto;
}

.list-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

.list-item:last-child {
  border-bottom: none;
}

.list-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.list-item h3 a {
  color: var(--text-primary);
}

.list-item h3 a:hover {
  color: var(--primary-color);
}

.list-item-meta {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 6px;
}

.list-item-desc {
  color: var(--text-secondary);
  font-size: 14px;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-primary);
}

.pagination a:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.pagination .current {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* ========== Tag Cloud ========== */
.tag-cloud {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.tag-item {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-primary);
}

.tag-item:hover {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* ========== 404 Page ========== */
.error-page {
  padding: 120px 0;
  text-align: center;
}

.error-page h1 {
  font-size: 96px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 16px;
}

.error-page h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 16px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 32px 0;
  text-align: center;
}

.site-footer .company-info {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.site-footer .copyright {
  color: var(--text-secondary);
  font-size: 13px;
}

.site-footer .copyright a {
  color: var(--text-secondary);
  margin: 0 4px;
}

.site-footer .copyright a:hover {
  color: var(--primary-color);
}

.police-beian {
  margin-left: 8px;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .hero {
    padding: 64px 0 48px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .features,
  .why-us,
  .scenarios,
  .faq-section,
  .cta {
    padding: 56px 0;
  }

  .features h2,
  .why-us h2,
  .scenarios h2,
  .faq-section h2,
  .cta h2 {
    font-size: 26px;
    margin-bottom: 32px;
  }

  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
  }

  .nav.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .article-header h1 {
    font-size: 26px;
  }

  .list-header h1 {
    font-size: 24px;
  }

  .error-page h1 {
    font-size: 72px;
  }
}