/* 西部数据机场 (wd-jc.cyou) - 浅粉色科技风样式系统 */

:root {
  /* 色彩系统 - 浅粉色科技风 */
  --bg-main: #fff0f5;
  --bg-gradient: linear-gradient(135deg, #fff0f5 0%, #fce4ec 40%, #f8bbd0 100%);
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 240, 245, 0.7);
  --bg-dark-accent: #2c1d27;
  
  --primary-color: #d81b60;
  --primary-light: #ff4081;
  --primary-dark: #ad1457;
  --primary-glow: rgba(216, 27, 96, 0.35);
  
  --accent-cyan: #00bcd4;
  --accent-cyan-glow: rgba(0, 188, 212, 0.4);
  --accent-purple: #8e24aa;
  
  --text-main: #2d1827;
  --text-muted: #6a4c5e;
  --text-light: #9e7b8f;
  --text-white: #ffffff;
  
  --border-light: rgba(216, 27, 96, 0.15);
  --border-glow: rgba(216, 27, 96, 0.4);
  --shadow-sm: 0 4px 15px rgba(216, 27, 96, 0.08);
  --shadow-lg: 0 12px 35px rgba(216, 27, 96, 0.16);
  --shadow-glow: 0 0 25px rgba(216, 27, 96, 0.25);
  
  /* 字体系统 - 核心要求的正楷字体 */
  --font-family: "STKaiti", "Kaiti", "楷体", "DFKai-SB", "Microsoft YaHei", serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background: var(--bg-main);
  background-image: radial-gradient(circle at 10% 20%, rgba(255, 128, 171, 0.15) 0%, transparent 40%),
                    radial-gradient(circle at 90% 80%, rgba(0, 188, 212, 0.12) 0%, transparent 40%),
                    linear-gradient(180deg, #fff0f5 0%, #fce4ec 50%, #f8bbd0 100%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Canvas 动态背景粒子 */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* 通用容器 */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

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

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

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: var(--text-white);
  box-shadow: 0 6px 20px rgba(216, 27, 96, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 28px rgba(216, 27, 96, 0.45);
  color: #ffffff;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: rotate(30deg) translateY(-100%);
  transition: var(--transition);
}

.btn-primary:hover::after {
  transform: rotate(30deg) translateY(100%);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.6);
  border-color: var(--primary-color);
  color: var(--primary-color);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--text-white);
  transform: translateY(-3px);
}

/* 顶部导航 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  padding: 18px 0;
  backdrop-filter: blur(12px);
  background: rgba(255, 240, 245, 0.75);
  border-bottom: 1px solid var(--border-light);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 20px rgba(216, 27, 96, 0.12);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

.logo-badge {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-purple));
  color: white;
  font-size: 0.8rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  position: relative;
  padding: 6px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-cyan));
  border-radius: 2px;
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Hero 板块 */
.hero {
  padding: 160px 0 90px;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--primary-color);
  border-radius: var(--radius-full);
  color: var(--primary-color);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 24px;
  box-shadow: 0 4px 15px rgba(216, 27, 96, 0.15);
  animation: pulse-glow 3s infinite alternate;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 10px rgba(216, 27, 96, 0.2); }
  100% { box-shadow: 0 0 25px rgba(216, 27, 96, 0.5); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #2d1827 0%, #ad1457 50%, #d81b60 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.4rem;
  color: var(--text-muted);
  max-width: 850px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-ctas {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary-color);
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 章节通用标题 */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 60px;
}

.section-subtitle {
  color: var(--primary-color);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
}

/* 核心优势板块 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(216, 27, 96, 0.15);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(216, 27, 96, 0.1), rgba(255, 64, 129, 0.2));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 24px;
}

.feature-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* 套餐价格板块 (深色科技暗卡与粉色外框对比 - 完全依据图片设计) */
.pricing-section {
  background: linear-gradient(180deg, rgba(255, 240, 245, 0.5) 0%, rgba(252, 228, 236, 0.8) 100%);
  padding: 100px 0;
  border-radius: var(--radius-lg);
  margin: 40px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: #0f172a; /* 深色科技背景完全匹配用户图片 */
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 40px 32px;
  border: 1px solid #1e293b;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 188, 212, 0.3);
}

.pricing-card.featured {
  border: 2px solid #00bcd4; /* 图片中的青色亮框 */
  box-shadow: 0 0 30px rgba(0, 188, 212, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.featured-badge {
  position: absolute;
  top: -14px;
  right: 32px;
  background: #00bcd4;
  color: #0f172a;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  box-shadow: 0 4px 12px rgba(0, 188, 212, 0.5);
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: #f8fafc;
}

.plan-price {
  font-size: 3.2rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 30px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.plan-price span {
  font-size: 1.1rem;
  color: #94a3b8;
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.plan-features li::before {
  content: '✓';
  color: #00bcd4;
  font-weight: 900;
  font-size: 1.2rem;
}

.btn-plan {
  width: 100%;
  padding: 14px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border: 1px solid #00bcd4;
  background: transparent;
  color: #00bcd4;
  display: block;
}

.btn-plan:hover {
  background: rgba(0, 188, 212, 0.15);
  box-shadow: 0 0 15px rgba(0, 188, 212, 0.4);
  color: #00bcd4;
}

.btn-plan.btn-plan-featured {
  background: #00bcd4;
  color: #0f172a;
  border: none;
  box-shadow: 0 4px 20px rgba(0, 188, 212, 0.4);
}

.btn-plan.btn-plan-featured:hover {
  background: #26c6da;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 188, 212, 0.6);
  color: #0f172a;
}

/* 使用教程板块 */
.tutorials-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.tutorial-tabs {
  display: flex;
  gap: 14px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 16px;
  overflow-x: auto;
}

.tab-btn {
  padding: 12px 24px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
  border-color: var(--primary-color);
  box-shadow: 0 4px 15px rgba(216, 27, 96, 0.3);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: rgba(255, 240, 245, 0.6);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 知识库与文章板块 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.article-tag {
  display: inline-block;
  background: rgba(216, 27, 96, 0.1);
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  width: fit-content;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-title a {
  color: var(--text-main);
}

.article-title a:hover {
  color: var(--primary-color);
}

.article-excerpt {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: var(--text-light);
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.read-more-link {
  font-weight: 700;
  color: var(--primary-color);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 用户评价板块 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  padding: 30px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.stars {
  color: #ffb300;
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.review-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.7;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-purple));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
}

.user-name {
  font-weight: 800;
  font-size: 1.1rem;
}

.user-role {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* FAQ 常见问题板块 */
.faq-accordion {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-question {
  padding: 22px 28px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--primary-color);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  background: rgba(255, 240, 245, 0.4);
}

.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.4s ease-in-out;
}

/* 60个热门标签板块 */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.tag-item {
  display: inline-block;
  padding: 8px 18px;
  background: rgba(255, 240, 245, 0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
}

.tag-item:hover {
  background: var(--primary-color);
  color: var(--text-white);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(216, 27, 96, 0.25);
}

/* 页脚 */
.footer {
  background: #1a0c16;
  color: #e0d0da;
  padding: 80px 0 40px;
  margin-top: 90px;
  border-top: 4px solid var(--primary-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand h3 {
  font-size: 1.8rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-brand p {
  color: #b096a7;
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 400px;
}

.footer-col h4 {
  font-size: 1.2rem;
  color: #ffffff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-color);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #b096a7;
  font-size: 1.05rem;
}

.footer-links a:hover {
  color: #ff4081;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: #8c7183;
}

/* 文章详情页专用样式 */
.article-page {
  padding-top: 120px;
}

.article-header {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 40px;
  padding: 40px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.article-header h1 {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 20px;
  color: var(--text-main);
  line-height: 1.35;
}

.article-content {
  background: var(--bg-card);
  max-width: 960px;
  margin: 0 auto 60px;
  padding: 50px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--text-main);
}

.article-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 40px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-light);
  color: var(--primary-dark);
}

.article-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 30px 0 15px;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 22px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 28px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  font-size: 1.05rem;
}

.article-content th, .article-content td {
  padding: 14px 18px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.article-content th {
  background: rgba(216, 27, 96, 0.1);
  color: var(--primary-dark);
  font-weight: 800;
}

.article-content tr:nth-child(even) {
  background: rgba(255, 240, 245, 0.4);
}

.callout-box {
  background: linear-gradient(135deg, rgba(216, 27, 96, 0.08), rgba(0, 188, 212, 0.08));
  border-left: 5px solid var(--primary-color);
  padding: 24px;
  border-radius: var(--radius-sm);
  margin: 30px 0;
  font-size: 1.1rem;
}

.article-cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(216, 27, 96, 0.12), rgba(142, 36, 170, 0.12));
  padding: 40px;
  border-radius: var(--radius-md);
  margin: 40px 0 20px;
  border: 1px solid var(--border-glow);
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .features-grid, .pricing-grid, .articles-grid, .reviews-grid, .steps-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured { transform: none; }
  .pricing-card.featured:hover { transform: translateY(-8px); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.15rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .features-grid, .pricing-grid, .articles-grid, .reviews-grid, .steps-list {
    grid-template-columns: 1fr;
  }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 14px; text-align: center; }
  .article-content { padding: 24px; }
}