/* skill_panel 介绍站点公共样式表
 * 约定：
 * - 所有页面使用 `.sp-*` 前缀，避免和现有 `ui/modern_*.html` 的样式互相干扰。
 * - 配色与布局尽量复用现有原型的视觉语言：主色蓝、圆角卡片、轻阴影、清晰层级。
 */

:root {
  --sp-primary: #3b82f6;
  --sp-primary-dark: #2563eb;
  --sp-primary-light: #60a5fa;
  --sp-success: #10b981;
  --sp-warning: #f59e0b;
  --sp-danger: #ef4444;

  --sp-dark: #1e293b;
  --sp-text: #1e293b;
  --sp-muted: #64748b;
  --sp-border: #e2e8f0;
  --sp-bg: #f8fafc;
  --sp-surface: #ffffff;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--sp-bg);
  color: var(--sp-text);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

* {
  box-sizing: border-box;
}

/* 基础容器与排版 */
.sp-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sp-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.sp-section {
  padding: 56px 0;
}

.sp-sectionTitle {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.2px;
  margin: 0 0 12px;
}

.sp-sectionSub {
  color: var(--sp-muted);
  font-size: 14px;
  margin: 0 0 24px;
  max-width: 720px;
}

/* 顶部导航 */
.sp-header {
  background: var(--sp-surface);
  border-bottom: 1px solid var(--sp-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 50;
}

.sp-headerInner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.sp-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
}

.sp-brandIcon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--sp-primary), var(--sp-primary-light));
  box-shadow: 0 8px 16px rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: #fff;
  font-weight: 800;
  user-select: none;
}

.sp-brandIconImg {
  width: 80%;
  height: 80%;
  object-fit: cover;
  display: block;
}

.sp-brandText {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.sp-brandName {
  font-size: 16px;
  font-weight: 700;
  color: var(--sp-dark);
}

.sp-brandTag {
  font-size: 12px;
  color: var(--sp-muted);
  margin-top: 2px;
}

.sp-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sp-navLink {
  height: 36px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  border-radius: 10px;
  color: var(--sp-muted);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
  font-size: 14px;
  white-space: nowrap;
}

.sp-navLink:hover {
  background: rgba(59, 130, 246, 0.06);
  color: var(--sp-primary-dark);
  transform: translateY(-1px);
}

.sp-navLink.isActive {
  background: rgba(59, 130, 246, 0.1);
  color: var(--sp-primary-dark);
  font-weight: 600;
}

.sp-headerActions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sp-mobileMenuBtn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--sp-border);
  background: var(--sp-surface);
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.sp-mobileMenuBtn:hover {
  transform: translateY(-1px);
  background: rgba(59, 130, 246, 0.06);
}

.sp-mobileMenu {
  display: none;
  padding: 14px 0 18px;
  border-top: 1px solid var(--sp-border);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
}

.sp-mobileMenu.isOpen {
  display: block;
}

.sp-mobileMenuGrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 0 20px;
}

.sp-mobileMenuGrid .sp-navLink {
  justify-content: center;
}

/* 按钮 */
.sp-btn {
  height: 40px;
  padding: 0 16px;
  border-radius: 12px;
  border: 1px solid var(--sp-border);
  background: var(--sp-surface);
  cursor: pointer;
  color: var(--sp-text);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
  user-select: none;
}

.sp-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.08);
}

.sp-btn.primary {
  border-color: var(--sp-primary);
  background: linear-gradient(135deg, var(--sp-primary), var(--sp-primary-light));
  color: #fff;
}

.sp-btn.primary:hover {
  box-shadow: 0 10px 26px rgba(59, 130, 246, 0.24);
}

.sp-btn.subtle {
  background: rgba(59, 130, 246, 0.06);
  border-color: rgba(59, 130, 246, 0.2);
  color: var(--sp-primary-dark);
}

.sp-btn.subtle:hover {
  background: rgba(59, 130, 246, 0.1);
}

/* 卡片 */
.sp-card {
  background: var(--sp-surface);
  border: 1px solid var(--sp-border);
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(30, 41, 59, 0.05);
}

.sp-cardInner {
  padding: 20px;
}

/* Hero */
.sp-hero {
  padding: 54px 0 18px;
}

.sp-heroGrid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: center;
}

.sp-heroTitle {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: 0.2px;
  margin: 0 0 12px;
  font-weight: 800;
  color: var(--sp-dark);
}

.sp-heroDesc {
  color: var(--sp-muted);
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  max-width: 640px;
}

.sp-heroActions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.sp-heroPreview {
  position: relative;
  overflow: hidden;
}

.sp-heroPreview::before {
  content: "";
  position: absolute;
  inset: -60px;
  background:
    linear-gradient(45deg, rgba(226, 232, 240, 0.9) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(226, 232, 240, 0.9) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(226, 232, 240, 0.9) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(226, 232, 240, 0.9) 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  opacity: 0.55;
  transform: rotate(3deg);
}

.sp-heroPreviewInner {
  position: relative;
  padding: 20px;
}

.sp-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

.sp-metricItem {
  padding: 14px 14px;
  border-radius: 14px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.8);
}

.sp-metricValue {
  font-size: 18px;
  font-weight: 800;
}

.sp-metricLabel {
  margin-top: 6px;
  color: var(--sp-muted);
  font-size: 12px;
  line-height: 1.4;
}

/* 网格与卡片列表 */
.sp-grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.sp-grid2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.sp-featureTitle {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 8px;
}

.sp-featureDesc {
  color: var(--sp-muted);
  margin: 0;
  line-height: 1.8;
  font-size: 14px;
}

/* FAQ 手风琴 */
.sp-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sp-accordionItem {
  border: 1px solid var(--sp-border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--sp-surface);
}

.sp-accordionButton {
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 18px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sp-accordionQ {
  font-weight: 800;
  color: var(--sp-dark);
  font-size: 14px;
  text-align: left;
}

.sp-accordionIcon {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: 1px solid var(--sp-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sp-muted);
  transition: transform 0.2s ease, background-color 0.2s ease;
  flex: 0 0 auto;
}

.sp-accordionItem.isOpen .sp-accordionIcon {
  transform: rotate(45deg);
  background: rgba(59, 130, 246, 0.06);
  color: var(--sp-primary-dark);
}

.sp-accordionPanel {
  padding: 0 18px 18px;
  color: var(--sp-muted);
  font-size: 14px;
  line-height: 1.8;
  display: none;
}

.sp-accordionItem.isOpen .sp-accordionPanel {
  display: block;
}

/* 页脚 */
.sp-footer {
  margin-top: auto;
  padding: 26px 0;
  border-top: 1px solid var(--sp-border);
  background: var(--sp-surface);
}

.sp-footerInner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--sp-muted);
  font-size: 12px;
}

.sp-footerLinks {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.sp-footerLink {
  color: var(--sp-muted);
}

.sp-footerLink:hover {
  color: var(--sp-primary-dark);
}

/* 通用排版块 */
.sp-badgeRow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.sp-badge {
  height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.18);
  color: var(--sp-primary-dark);
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 12px;
}

/* 响应式 */
@media (max-width: 980px) {
  .sp-heroGrid {
    grid-template-columns: 1fr;
  }
  .sp-heroTitle {
    font-size: 32px;
  }
  .sp-grid3 {
    grid-template-columns: 1fr;
  }
  .sp-grid2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .sp-nav {
    display: none;
  }
  .sp-mobileMenuBtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .sp-brand {
    min-width: auto;
  }
  .sp-mobileMenuGrid {
    padding-left: 0;
    padding-right: 0;
  }
}

/* 减少动画（可选，尊重系统设置） */
@media (prefers-reduced-motion: reduce) {
  .sp-navLink,
  .sp-btn,
  .sp-accordionIcon {
    transition: none;
  }
}