/* ==========================================================================
   一枝红杏 (yizhi-hongxing.homes) - 官方设计系统样式表
   Design Language: Modern Cyber-Crimson Dark Theme & Glassmorphism
   ========================================================================== */

:root {
  --bg-primary: #0a0c12;
  --bg-secondary: #11141e;
  --bg-card: rgba(22, 27, 40, 0.75);
  --bg-card-hover: rgba(28, 35, 52, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 46, 99, 0.35);

  --accent-primary: #ff2e63;
  --accent-gradient: linear-gradient(135deg, #ff2e63 0%, #ff4b2b 100%);
  --accent-blue: #1677ff;
  --accent-blue-hover: #0958d9;
  --accent-blue-gradient: linear-gradient(135deg, #2f54eb 0%, #1677ff 100%);
  --accent-glow: rgba(255, 46, 99, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-link: #38bdf8;

  --success-color: #10b981;
  --warning-color: #f59e0b;
  --notice-bg: #fff1f0;
  --notice-border: #ffa39e;
  --notice-text: #cf1322;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, "Courier New", monospace;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(255, 46, 99, 0.25);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 动态环境背景光晕 */
.ambient-glow-1 {
  position: fixed;
  top: -150px;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 46, 99, 0.12) 0%, rgba(255, 46, 99, 0) 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-2 {
  position: fixed;
  top: 40%;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.1) 0%, rgba(22, 119, 255, 0) 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

/* 顶部公告栏 (还原参考图特征) */
.top-notice-bar {
  background-color: var(--notice-bg);
  border-bottom: 1px solid var(--notice-border);
  color: var(--notice-text);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 1100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.top-notice-bar .notice-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-notice-bar .notice-link {
  color: var(--notice-text);
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.top-notice-bar .notice-link:hover {
  opacity: 0.8;
}

.top-notice-bar .notice-close {
  position: absolute;
  right: 20px;
  background: none;
  border: none;
  color: var(--notice-text);
  font-size: 18px;
  cursor: pointer;
  opacity: 0.7;
  padding: 2px 6px;
  transition: opacity 0.2s ease;
}

.top-notice-bar .notice-close:hover {
  opacity: 1;
}

/* 统一容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 导航栏 */
.navbar {
  position: sticky;
  top: 41px; /* notice bar 下方 */
  z-index: 1000;
  background: rgba(10, 12, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: top 0.3s ease;
}

.navbar.notice-closed {
  top: 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(255, 46, 99, 0.4);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  fill: #fff;
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 30%, #ffd1dc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-domain-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  background: rgba(255, 46, 99, 0.15);
  color: #ff7597;
  border: 1px solid rgba(255, 46, 99, 0.3);
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 18px rgba(255, 46, 99, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 46, 99, 0.5);
  color: #fff;
}

.btn-blue {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 4px 14px rgba(22, 119, 255, 0.35);
}

.btn-blue:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(22, 119, 255, 0.5);
  color: #fff;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
}

/* Hero 首屏 */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 30px;
  background: rgba(255, 46, 99, 0.12);
  border: 1px solid rgba(255, 46, 99, 0.25);
  color: #ff5e87;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-tag .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
  animation: pulseAnimation 1.8s infinite;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 52px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero-title span.highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.metric-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.metric-card .metric-val {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.metric-card .metric-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* 测速及状态矩阵条 */
.live-status-bar {
  margin-top: 40px;
  background: rgba(18, 22, 33, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 1080px;
  margin: 40px auto 0;
}

.status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-bottom: 12px;
}

.status-header h4 {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.node-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 16px;
}

.node-ping {
  font-family: var(--font-mono);
  color: var(--success-color);
  font-weight: 600;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 10px;
  display: inline-block;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* 核心特性模块 */
.features-section {
  padding: 90px 0;
  position: relative;
}

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

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-box:hover {
  border-color: rgba(255, 46, 99, 0.4);
  transform: translateY(-6px);
  box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.7);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(255, 46, 99, 0.12);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  font-size: 24px;
}

.feature-box h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-box p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* ==========================================================================
   套餐定价板块 - 严格还原用户参考图
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  background: linear-gradient(180deg, rgba(16, 20, 31, 0) 0%, rgba(16, 20, 31, 0.6) 100%);
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.pricing-card {
  background: #ffffff;
  color: #1a1a1a;
  border-radius: 12px;
  padding: 40px 32px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.pricing-card.featured-card {
  border: 2px solid #2b7fff;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

/* 参考图右上角 Featured 缎带 */
.corner-ribbon {
  position: absolute;
  top: 18px;
  right: -32px;
  width: 120px;
  background: #1677ff;
  color: #fff;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  line-height: 22px;
  transform: rotate(45deg);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  letter-spacing: 0.5px;
}

.plan-title {
  font-size: 26px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 12px;
}

.price-container {
  margin-bottom: 24px;
}

.price-sub-prefix {
  font-size: 13px;
  color: #6b7280;
  margin-bottom: 2px;
}

.price-amount {
  font-size: 42px;
  font-weight: 900;
  color: #111827;
  line-height: 1.1;
  font-family: var(--font-sans);
  letter-spacing: -0.5px;
}

.price-billing-cycle {
  font-size: 14px;
  color: #6b7280;
  margin-top: 4px;
}

.plan-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  flex-grow: 1;
}

.plan-features-list li {
  font-size: 15px;
  color: #374151;
  padding: 9px 0;
  border-bottom: 1px dashed #e5e7eb;
}

.plan-features-list li:last-child {
  border-bottom: none;
}

.plan-features-list li.highlight-feat {
  font-weight: 700;
  color: #111827;
}

.pricing-card .btn-order {
  width: 100%;
  padding: 13px 20px;
  font-size: 16px;
  font-weight: 600;
  background-color: #1677ff;
  color: #ffffff;
  border-radius: 6px;
  text-decoration: none;
  display: block;
  transition: background-color 0.2s ease, transform 0.15s ease;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.25);
}

.pricing-card .btn-order:hover {
  background-color: #0958d9;
  transform: scale(1.01);
}

.pricing-note {
  text-align: center;
  margin-top: 36px;
  color: var(--text-secondary);
  font-size: 14px;
}

.pricing-note a {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* ==========================================================================
   教程站 (Tutorial Station)
   ========================================================================== */
.tutorial-section {
  padding: 90px 0;
  background: var(--bg-primary);
  position: relative;
}

.tutorial-tabs-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tutorial-tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.tutorial-tab-btn:hover {
  color: #fff;
  border-color: rgba(255, 46, 99, 0.3);
}

.tutorial-tab-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(255, 46, 99, 0.35);
}

.tutorial-tab-content {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  animation: fadeIn 0.35s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tut-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}

.tut-steps h4 {
  font-size: 20px;
  margin-bottom: 20px;
  color: #fff;
}

.step-list {
  list-style: none;
  position: relative;
  padding-left: 28px;
}

.step-list::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  bottom: 10px;
  width: 2px;
  background: rgba(255, 255, 255, 0.1);
}

.step-item {
  position: relative;
  margin-bottom: 24px;
}

.step-number {
  position: absolute;
  left: -28px;
  top: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-item h5 {
  font-size: 16px;
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tut-side-box {
  background: rgba(10, 12, 18, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tut-side-box h5 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tut-download-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.tut-dl-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
}

.tut-dl-btn:hover {
  background: rgba(255, 46, 99, 0.1);
  border-color: rgba(255, 46, 99, 0.3);
  color: #fff;
}

.code-box {
  background: #06080c;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #38bdf8;
  overflow-x: auto;
  position: relative;
}

/* ==========================================================================
   文章站 (Article Deep Dive - 2000+ Words, Organic SEO & GEO)
   ========================================================================== */
.article-section {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0d1017 100%);
  position: relative;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--text-muted);
  font-size: 13px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 24px;
  margin-bottom: 36px;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h2::before {
  content: '';
  width: 4px;
  height: 22px;
  background: var(--accent-primary);
  border-radius: 2px;
  display: inline-block;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: #f1f5f9;
  margin: 28px 0 14px;
}

.article-body p {
  color: #cbd5e1;
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  color: #cbd5e1;
  font-size: 15px;
  line-height: 1.8;
  margin: 16px 0 24px 24px;
}

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

.article-callout {
  background: rgba(255, 46, 99, 0.08);
  border-left: 4px solid var(--accent-primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 28px 0;
}

.article-callout p {
  color: #fca5a5;
  margin-bottom: 0;
  font-size: 15px;
}

.article-comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
}

.article-comparison-table th,
.article-comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--glass-border);
}

.article-comparison-table th {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  font-weight: 600;
}

.article-comparison-table td {
  color: var(--text-secondary);
}

/* ==========================================================================
   痛点 FAQ 问答站 (6-9 个直击痛点 + Schema.org FAQPage)
   ========================================================================== */
.faq-section {
  padding: 90px 0;
  position: relative;
}

.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(255, 46, 99, 0.25);
}

.faq-item.active {
  border-color: rgba(255, 46, 99, 0.4);
  background: var(--bg-card-hover);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  outline: none;
}

.faq-question .faq-q-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-tag-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255, 46, 99, 0.15);
  color: #ff6b8b;
  font-weight: 600;
}

.faq-chevron {
  font-size: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  padding: 0 24px 22px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* CTA 转化区 */
.cta-banner-section {
  padding: 80px 0;
  position: relative;
}

.cta-banner-card {
  background: linear-gradient(135deg, rgba(30, 24, 44, 0.9) 0%, rgba(20, 24, 38, 0.9) 100%);
  border: 1px solid rgba(255, 46, 99, 0.3);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.cta-banner-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 46, 99, 0.25) 0%, transparent 70%);
  filter: blur(50px);
}

.cta-banner-card h2 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 18px;
  position: relative;
}

.cta-banner-card p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto 32px;
  position: relative;
}

/* 页脚 */
.site-footer {
  background: #06080c;
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 30px;
  font-size: 14px;
  color: var(--text-muted);
}

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

.footer-col h5 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* 浮动快速购买按钮 */
.floating-order-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--accent-gradient);
  color: #fff;
  padding: 14px 24px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 25px rgba(255, 46, 99, 0.45);
  z-index: 999;
  transition: var(--transition);
}

.floating-order-btn:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 30px rgba(255, 46, 99, 0.6);
  color: #fff;
}

/* 移动端适配响应式 */
@media (max-width: 992px) {
  .hero-title { font-size: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; }
  .tut-content-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .top-notice-bar { font-size: 12px; padding: 8px 12px; }
  .top-notice-bar .notice-close { right: 10px; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .article-container { padding: 30px 20px; }
  .article-body h2 { font-size: 22px; }
  .article-body h3 { font-size: 18px; }
  .article-body p { font-size: 15px; }
  .cta-banner-card { padding: 40px 20px; }
  .cta-banner-card h2 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .floating-order-btn { bottom: 20px; right: 20px; padding: 12px 18px; font-size: 14px; }
}