/* ===========================================================
   MaxKB FDE 教学网站 · 紫色 AI 科技风
   配色：#5B2EBF（深紫）/ #8B5CF6（紫）/ #1E40AF（蓝）
   风格：现代教学门户 · 卡片化布局 · 响应式
   作者：小 Q 为小陶老师定制 · 2026-07-23
   =========================================================== */

:root {
  --purple-deep: #5B2EBF;
  --purple: #8B5CF6;
  --purple-light: #C4B5FD;
  --blue: #3B82F6;
  --blue-deep: #1E40AF;
  --blue-light: #DBEAFE;
  --dark: #1F2937;
  --gray: #6B7280;
  --gray-light: #F3F4F6;
  --bg: #FAFAFB;
  --white: #FFFFFF;
  --green: #34D399;
  --yellow: #FCD34D;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--bg);
  overflow-x: hidden;
}

/* === 全局链接 === */
a { color: var(--purple-deep); text-decoration: none; transition: all .2s; }
a:hover { color: var(--blue-deep); }

/* === 顶部导航 === */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-light);
  padding: 16px 0;
}
.nav-container {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px;
}
.nav-logo {
  display: flex; align-items: center; gap: 12px;
  font-size: 20px; font-weight: 700; color: var(--purple-deep);
}
.nav-logo .logo-dot {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: bold;
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--gray); font-weight: 500; font-size: 14px;
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--purple-deep); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--purple-deep); border-radius: 2px;
}
.nav-cta {
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  color: white !important; padding: 8px 20px;
  border-radius: 8px; font-weight: 600;
}

/* === Hero 首页 === */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, var(--purple-deep) 100%);
  color: white;
  position: relative;
  padding: 120px 32px 60px;
  overflow: hidden;
}
.hero::before, .hero::after {
  content: ''; position: absolute;
  border-radius: 50%; filter: blur(80px); opacity: 0.4;
}
.hero::before {
  width: 400px; height: 400px;
  background: var(--purple);
  top: -100px; left: -100px;
}
.hero::after {
  width: 500px; height: 500px;
  background: var(--blue);
  bottom: -150px; right: -150px;
}
.hero-content {
  max-width: 1200px; margin: 0 auto;
  text-align: center; position: relative; z-index: 2;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.15);
  padding: 8px 16px; border-radius: 999px;
  font-size: 14px; margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.2);
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800; margin-bottom: 24px;
  background: linear-gradient(135deg, #fff, var(--purple-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.hero .subtitle {
  font-size: clamp(18px, 2.5vw, 26px);
  color: rgba(255,255,255,0.85);
  margin-bottom: 12px; font-weight: 500;
}
.hero .desc {
  font-size: 18px; color: rgba(255,255,255,0.7);
  max-width: 800px; margin: 0 auto 40px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  padding: 14px 32px; border-radius: 12px;
  font-weight: 600; font-size: 16px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all .2s;
}
.btn-primary {
  background: white; color: var(--purple-deep);
  box-shadow: 0 10px 30px rgba(255,255,255,0.2);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 15px 40px rgba(255,255,255,0.3); }
.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover { background: rgba(255,255,255,0.2); }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  max-width: 900px; margin: 60px auto 0;
}
.stat-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(20px);
  border-radius: 16px; padding: 24px; text-align: center;
}
.stat-num {
  font-size: 36px; font-weight: 800;
  background: linear-gradient(135deg, #fff, var(--purple-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 13px; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* === Section 通用 === */
section {
  padding: 80px 32px;
  max-width: 1280px; margin: 0 auto;
}
.section-tag {
  display: inline-block;
  background: var(--purple-light);
  color: var(--purple-deep);
  padding: 6px 16px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  margin-bottom: 16px; letter-spacing: 0.5px;
}
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800; margin-bottom: 16px;
  color: var(--dark); letter-spacing: -0.5px;
}
.section-title .highlight {
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  font-size: 18px; color: var(--gray);
  max-width: 800px; margin-bottom: 60px;
}

/* === 课程章节 === */
.chapter-tabs {
  display: flex; gap: 12px; margin-bottom: 32px;
  border-bottom: 2px solid var(--gray-light);
  flex-wrap: wrap;
}
.chapter-tab {
  padding: 12px 24px; background: none;
  border: none; font-size: 15px; font-weight: 600;
  color: var(--gray); cursor: pointer;
  position: relative; transition: all .2s;
}
.chapter-tab.active { color: var(--purple-deep); }
.chapter-tab.active::after {
  content: ''; position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 3px; background: var(--purple-deep);
  border-radius: 2px;
}
.chapter-content { display: none; }
.chapter-content.active { display: block; }

/* === 章节卡片网格 === */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.chapter-card {
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: 16px;
  padding: 28px;
  transition: all .3s;
  position: relative; overflow: hidden;
}
.chapter-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; width: 4px; height: 100%;
  background: var(--purple);
}
.chapter-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(91,46,191,0.15);
  border-color: var(--purple-light);
}
.chapter-card h3 {
  font-size: 20px; color: var(--purple-deep);
  margin-bottom: 12px; font-weight: 700;
}
.chapter-card p { color: var(--gray); font-size: 14px; margin-bottom: 16px; }
.chapter-card .meta {
  display: flex; gap: 16px; font-size: 13px;
  color: var(--gray); margin-bottom: 16px;
}
.chapter-card .meta span { display: flex; align-items: center; gap: 4px; }
.chapter-card .actions { display: flex; gap: 8px; }
.chapter-card .actions a {
  flex: 1; padding: 10px; text-align: center;
  background: var(--gray-light); border-radius: 8px;
  font-size: 13px; font-weight: 600; color: var(--dark);
}
.chapter-card .actions a:hover { background: var(--purple-light); color: var(--purple-deep); }
.chapter-card .actions a.primary {
  background: var(--purple-deep); color: white;
}
.chapter-card .actions a.primary:hover { background: var(--purple); color: white; }

/* === 实战步骤 === */
.steps {
  display: grid; gap: 24px;
}
.step {
  display: grid; grid-template-columns: 80px 1fr; gap: 24px;
  background: var(--white);
  padding: 32px; border-radius: 16px;
  border: 1px solid var(--gray-light);
  transition: all .3s;
}
.step:hover {
  border-color: var(--purple-light);
  box-shadow: 0 10px 30px rgba(91,46,191,0.08);
}
.step-num {
  width: 80px; height: 80px;
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 32px; font-weight: 800;
}
.step h3 {
  font-size: 22px; color: var(--purple-deep);
  margin-bottom: 12px;
}
.step p { color: var(--gray); margin-bottom: 12px; }
.step .code-block {
  background: #1F2937; color: #E5E7EB;
  padding: 16px; border-radius: 8px;
  font-family: "Fira Code", monospace; font-size: 13px;
  overflow-x: auto; margin-top: 12px;
  line-height: 1.5;
}

/* === 5 大场景 === */
.scenarios {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.scenario {
  background: var(--white);
  border-radius: 16px; padding: 24px;
  border: 1px solid var(--gray-light);
  position: relative;
  transition: all .3s;
}
.scenario:hover {
  transform: translateY(-4px);
  border-color: var(--purple);
  box-shadow: 0 15px 40px rgba(91,46,191,0.15);
}
.scenario .icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--purple-light), var(--blue-light));
}
.scenario h3 {
  font-size: 18px; color: var(--purple-deep);
  margin-bottom: 8px;
}
.scenario p { color: var(--gray); font-size: 14px; margin-bottom: 16px; }
.scenario .roi {
  display: inline-block; padding: 4px 12px;
  background: var(--green);
  color: white; border-radius: 999px;
  font-size: 12px; font-weight: 700;
}

/* === 资源下载 === */
.resources {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.resource {
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: 16px; padding: 24px;
  display: flex; align-items: center; gap: 16px;
  transition: all .3s;
}
.resource:hover {
  border-color: var(--purple);
  background: linear-gradient(135deg, rgba(91,46,191,0.02), rgba(59,130,246,0.02));
}
.resource .icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 24px; font-weight: 700;
}
.resource .info { flex: 1; }
.resource h3 { font-size: 16px; color: var(--dark); margin-bottom: 4px; }
.resource p { font-size: 13px; color: var(--gray); }
.resource .size { font-size: 12px; color: var(--gray); margin-top: 4px; }
.resource .download {
  background: var(--purple-deep); color: white;
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.resource .download:hover { background: var(--blue-deep); transform: scale(1.1); }

/* === 底部 === */
.footer {
  background: #1F2937;
  color: white; padding: 60px 32px 30px;
  margin-top: 80px;
}
.footer-content {
  max-width: 1280px; margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .nav-logo { color: white; margin-bottom: 16px; }
.footer-brand p { color: rgba(255,255,255,0.6); font-size: 14px; }
.footer-col h4 {
  font-size: 14px; font-weight: 600;
  margin-bottom: 16px; color: white;
}
.footer-col a {
  display: block; color: rgba(255,255,255,0.6);
  font-size: 14px; padding: 4px 0;
}
.footer-col a:hover { color: var(--purple-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center; color: rgba(255,255,255,0.4);
  font-size: 13px;
}

/* === 留言表单 === */
.contact-section {
  background: linear-gradient(135deg, var(--purple-deep), var(--blue-deep));
  color: white; padding: 80px 32px;
  border-radius: 0;
  max-width: 100%;
}
.contact-section .section-tag {
  background: rgba(255,255,255,0.2);
  color: white;
}
.contact-section .section-title { color: white; }
.contact-section .section-subtitle { color: rgba(255,255,255,0.8); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px; max-width: 1280px; margin: 0 auto;
}
.contact-form {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 40px; border-radius: 20px;
}
.contact-form h3 {
  font-size: 24px; margin-bottom: 24px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 14px;
  margin-bottom: 8px; color: rgba(255,255,255,0.85);
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  color: white; font-size: 15px;
  font-family: inherit;
  transition: all .2s;
}
.form-group input::placeholder, .form-group textarea::placeholder {
  color: rgba(255,255,255,0.5);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--purple-light);
  background: rgba(255,255,255,0.15);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.contact-info { padding: 20px 0; }
.contact-info h3 { font-size: 24px; margin-bottom: 24px; }
.contact-item {
  display: flex; gap: 16px;
  margin-bottom: 24px; align-items: flex-start;
}
.contact-item .icon {
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.15);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.contact-item .info h4 { font-size: 15px; margin-bottom: 4px; }
.contact-item .info p { font-size: 14px; color: rgba(255,255,255,0.7); }

/* === 响应式 === */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { padding: 100px 20px 40px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  section { padding: 60px 20px; }
  .footer-content { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; }
  .step-num { width: 60px; height: 60px; font-size: 24px; }
}

/* === 动画 === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp .6s ease-out; }
.fade-in-delay-1 { animation-delay: .1s; animation-fill-mode: both; }
.fade-in-delay-2 { animation-delay: .2s; animation-fill-mode: both; }
.fade-in-delay-3 { animation-delay: .3s; animation-fill-mode: both; }

/* ===========================================================
   SaaS 商业化组件 · v2 (2026-09-11)
   在原紫色 AI 科技风基础上追加的商业站点常见元素
   =========================================================== */

/* ---------- 顶部信任徽章条 ---------- */
.trust-bar {
  background: linear-gradient(90deg, rgba(91,46,191,0.92), rgba(59,130,246,0.92));
  color: #fff;
  font-size: 13px;
  padding: 10px 24px;
  display: flex; gap: 28px; flex-wrap: wrap;
  justify-content: center; align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.trust-bar .tb-item { display: inline-flex; gap: 6px; align-items: center; opacity: 0.95; }
.trust-bar .tb-item strong { color: #FCD34D; font-weight: 700; }

/* ---------- 数据大字报 ---------- */
.stat-mega {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  padding: 64px 32px;
  background: linear-gradient(135deg, #1E1B4B 0%, #5B2EBF 60%, #3B82F6 100%);
  color: #fff;
  text-align: center;
}
.stat-mega .stat-item .num {
  font-size: 56px; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, #FCD34D, #fff);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-mega .stat-item .label {
  color: rgba(255,255,255,0.85); margin-top: 8px; font-size: 14px;
  letter-spacing: 0.5px;
}
.stat-mega .stat-item .sub { font-size: 11px; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* ---------- 客户 Logo 墙 ---------- */
.logo-wall {
  padding: 56px 32px;
  background: #FAFAFB;
  text-align: center;
}
.logo-wall h3 {
  color: var(--gray); font-size: 13px; font-weight: 500;
  letter-spacing: 2px; margin-bottom: 28px; text-transform: uppercase;
}
.logo-wall .logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 20px;
  max-width: 1080px; margin: 0 auto;
}
.logo-wall .logo-item {
  background: #fff;
  border: 1px solid var(--gray-light);
  border-radius: 10px;
  padding: 18px 12px;
  font-weight: 700;
  color: var(--gray);
  display: flex; align-items: center; justify-content: center;
  height: 64px;
  transition: all .2s;
}
.logo-wall .logo-item:hover {
  border-color: var(--purple-light);
  color: var(--purple-deep);
  transform: translateY(-2px);
}

/* ---------- 客户证言 ---------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  padding: 0;
  max-width: 1200px;
  margin: 0 auto;
}
.testimonial-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  display: flex; flex-direction: column; gap: 16px;
  border: 1px solid var(--gray-light);
  transition: all .3s;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(91,46,191,0.12);
  border-color: var(--purple-light);
}
.testimonial-card .stars { color: #FCD34D; font-size: 16px; letter-spacing: 2px; }
.testimonial-card .quote {
  font-size: 15px; line-height: 1.75; color: var(--dark);
  flex: 1;
}
.testimonial-card .author {
  display: flex; align-items: center; gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-light);
}
.testimonial-card .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  color: #fff; font-weight: 700; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.testimonial-card .info .name { font-weight: 700; color: var(--purple-deep); font-size: 14px; }
.testimonial-card .info .role { font-size: 12px; color: var(--gray); margin-top: 2px; }

/* ---------- 套餐对比表 ---------- */
.comparison-table-wrap {
  overflow-x: auto;
  max-width: 1080px; margin: 0 auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.comparison-table {
  width: 100%; border-collapse: collapse; background: #fff;
}
.comparison-table th, .comparison-table td {
  padding: 14px 18px; border-bottom: 1px solid var(--gray-light); text-align: center;
  font-size: 14px;
}
.comparison-table thead th {
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  color: #fff; font-weight: 700;
}
.comparison-table thead th.featured {
  background: linear-gradient(135deg, #F59E0B, #EF4444);
}
.comparison-table tbody tr:hover { background: #FAFAFB; }
.comparison-table td:first-child, .comparison-table th:first-child { text-align: left; font-weight: 600; }
.comparison-table .yes { color: #34D399; font-weight: 700; font-size: 18px; }
.comparison-table .no  { color: #CBD5E1; font-size: 18px; }

/* ---------- FAQ Accordion ---------- */
.faq-accordion {
  max-width: 800px; margin: 0 auto;
}
.faq-accordion .faq-item {
  border-bottom: 1px solid var(--gray-light);
  background: #fff;
}
.faq-accordion .faq-item:first-child { border-top-left-radius: 12px; border-top-right-radius: 12px; }
.faq-accordion .faq-item:last-child  { border-bottom-left-radius: 12px; border-bottom-right-radius: 12px; }
.faq-accordion .faq-q {
  width: 100%; background: none; border: none; text-align: left;
  padding: 20px 24px; font-size: 16px; font-weight: 600;
  color: var(--purple-deep);
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
  font-family: inherit;
}
.faq-accordion .faq-q:hover { background: #FAFAFB; }
.faq-accordion .faq-q::after {
  content: '+'; font-size: 24px; color: var(--purple); font-weight: 300;
  flex-shrink: 0; transition: transform .2s;
}
.faq-accordion .faq-item.open .faq-q::after { content: '−'; }
.faq-accordion .faq-a {
  display: none;
  padding: 0 24px 24px;
  color: var(--gray); line-height: 1.8; font-size: 14px;
}
.faq-accordion .faq-item.open .faq-a { display: block; }

/* ---------- 终极 CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, #5B2EBF 0%, #3B82F6 60%, #EF4444 100%);
  color: #fff;
  padding: 80px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; top: -50%; left: -10%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(252,211,77,0.3) 0%, transparent 70%);
  filter: blur(60px);
}
.cta-banner::after {
  content: ''; position: absolute; bottom: -50%; right: -10%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.3) 0%, transparent 70%);
  filter: blur(60px);
}
.cta-banner .cta-content { position: relative; z-index: 1; }
.cta-banner h2 { font-size: 38px; font-weight: 800; margin-bottom: 16px; }
.cta-banner .subtitle { font-size: 16px; opacity: 0.9; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-banner .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-banner .btn-cta-primary {
  background: #fff; color: var(--purple-deep); padding: 16px 36px;
  border-radius: 10px; font-weight: 700; font-size: 16px;
  text-decoration: none; display: inline-block;
  transition: transform .2s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.cta-banner .btn-cta-primary:hover { transform: translateY(-2px); }
.cta-banner .btn-cta-secondary {
  background: rgba(255,255,255,0.15);
  color: #fff;
  padding: 16px 36px;
  border-radius: 10px;
  font-weight: 700; font-size: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  text-decoration: none; display: inline-block;
  transition: all .2s;
}
.cta-banner .btn-cta-secondary:hover { background: rgba(255,255,255,0.25); }

/* ---------- 案例卡 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  max-width: 1200px; margin: 0 auto;
}
.case-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  transition: all .3s;
  border: 1px solid var(--gray-light);
  display: flex; flex-direction: column;
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(91,46,191,0.15);
}
.case-card .case-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--purple-deep), var(--blue));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 56px;
  position: relative;
}
.case-card .case-tag {
  position: absolute; top: 14px; left: 14px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}
.case-card .case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-card .case-body h3 { color: var(--purple-deep); margin-bottom: 10px; font-size: 20px; }
.case-card .case-body .industry { color: var(--gray); font-size: 12px; margin-bottom: 12px; }
.case-card .case-body p { color: var(--gray); font-size: 14px; line-height: 1.7; flex: 1; }
.case-card .case-roi {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-light);
}
.case-card .roi-label { font-size: 12px; color: var(--gray); }
.case-card .roi-value { font-size: 22px; font-weight: 800; color: var(--purple-deep); }

/* ---------- Plan Badge (admin) ---------- */
.plan-badge, .status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

/* ---------- Mini Buttons (admin) ---------- */
.btn-mini {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
  border: 1px solid var(--gray-light);
  background: #fff;
  cursor: pointer;
  margin-right: 4px;
  transition: all .15s;
  font-family: inherit;
}
.btn-mini:hover { background: var(--gray-light); }
.btn-mini.btn-standard { background: #8B5CF6; color: #fff; border-color: #8B5CF6; }
.btn-mini.btn-flagship { background: #5B2EBF; color: #fff; border-color: #5B2EBF; }
.btn-mini.btn-danger   { background: #EF4444; color: #fff; border-color: #EF4444; }
.btn-mini.btn-success  { background: #34D399; color: #fff; border-color: #34D399; }
.btn-mini:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Hamburger (mobile) ---------- */
.hamburger {
  display: none;
  background: none; border: none;
  font-size: 24px; cursor: pointer;
  color: var(--purple-deep);
  padding: 4px 8px;
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 12px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; padding: 20px 32px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    border-top: 1px solid var(--gray-light);
  }
  .hamburger { display: block; }
  .stat-mega .stat-item .num { font-size: 40px; }
  .cta-banner h2 { font-size: 26px; }
}

/* ---------- Pricing Card Refinement (membership) ---------- */
.save-tag {
  position: absolute; top: -10px; right: 20px;
  background: linear-gradient(135deg, #FCD34D, #F59E0B);
  color: #7c2d12;
  padding: 4px 12px; border-radius: 12px;
  font-size: 11px; font-weight: 700;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.plan-card-highlight {
  border: 2px solid var(--purple);
  transform: scale(1.02);
  box-shadow: 0 12px 40px rgba(91,46,191,0.2);
}

/* ---------- Section Padding Override ---------- */
.section-tight { padding: 60px 32px !important; }

.fade-in-delay-3 { animation-delay: .3s; animation-fill-mode: both; }