/* 
 * poipiku工具 官网样式表
 * 采用清爽浅色系风格 (对标 poipiku.com 官方蓝白视觉)，以经典天空蓝为主调
 */

:root {
  --primary: #3598db;
  --primary-hover: #2482c2;
  --primary-light: #3598db;
  --primary-glow: rgba(53, 152, 219, 0.2);
  --bg-dark: #3598db; /* 经典天空蓝背景 */
  --bg-darker: #1f6fbc; /* 页脚和重点强调色 */
  --bg-card: #ffffff; /* 纯白卡片 */
  --bg-card-hover: #f8fbfd; /* 悬浮浅灰蓝 */
  --border-color: rgba(0, 0, 0, 0.06);
  --border-color-hover: rgba(53, 152, 219, 0.25);
  --text-primary: #2c3e50; /* 舒适深灰色正文 */
  --text-secondary: #54667a;
  --text-muted: #7f8c8d;
  --success: #2ecc71;
  --max-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* 基础重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* 引入背景清爽发光球 */
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1000px;
  background: 
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.25) 0%, transparent 70%),
    radial-gradient(circle at 15% 300px, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
  z-index: -1;
  pointer-events: none;
}

/* 统一布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 导航栏 */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 0 10px rgba(53, 152, 219, 0.15);
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #2c3e50;
}

.logo-text span {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2rem;
}

.nav-item a {
  color: #5a6c7d;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.5rem 0;
  position: relative;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--primary);
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(53, 152, 219, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* 汉堡菜单按钮 (移动端) */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

/* 主内容区域间距 */
main {
  padding-top: 100px;
}

/* 节（Section）通用样式 */
.section-padding {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1rem;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.section-desc {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
}

/* 极简网格布局系统 */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Bento 风格网格 */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.bento-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-color-hover);
  box-shadow: 0 10px 30px rgba(53, 152, 219, 0.08);
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(130deg, rgba(53, 152, 219, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.bento-card-large {
  grid-column: span 2;
}

.bento-card-tall {
  grid-row: span 2;
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(53, 152, 219, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(53, 152, 219, 0.2);
  color: var(--primary);
  font-size: 1.25rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 首页 Hero 区域 */
.hero-section {
  position: relative;
  padding: 7rem 0 5rem 0;
  overflow: hidden;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
  color: #ffffff;
}

.hero-content h1 span {
  background: linear-gradient(120deg, #ffffff 40%, #d4e6f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 纯 CSS/HTML 客户端预览 Mockup */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.mockup-wrapper {
  position: relative;
  width: 290px;
  height: 580px;
  background: #f8fafc;
  border: 10px solid #e2e8f0;
  border-radius: 40px;
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.15),
    0 0 30px rgba(255, 255, 255, 0.25);
  overflow: hidden;
}

/* 听筒 */
.mockup-camera {
  position: absolute;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 25px;
  background: #e2e8f0;
  border-radius: 20px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-camera::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
  margin-left: 50px;
}

.mockup-screen {
  width: 100%;
  height: 100%;
  background: #3598db;
  padding: 50px 16px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  overflow: hidden;
  font-size: 11px;
}

.mockup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.mockup-logo {
  display: flex;
  align-items: center;
  gap: 5px;
  font-weight: 700;
  color: #ffffff;
}

.mockup-feed {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  height: 100%;
  padding-right: 2px;
}

/* 隐藏滚动条 */
.mockup-feed::-webkit-scrollbar {
  display: none;
}

.mockup-post {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: #2c3e50;
}

.mockup-post-header {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mockup-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #85c1e9);
}

.mockup-author {
  font-weight: 600;
  color: #2c3e50;
}

.mockup-img-placeholder {
  width: 100%;
  height: 140px;
  border-radius: 8px;
  background: linear-gradient(135deg, #ebf5fb 0%, #d4e6f1 100%);
  border: 1px dashed rgba(53, 152, 219, 0.3);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #3598db;
  font-size: 10px;
  gap: 5px;
  position: relative;
  overflow: hidden;
}

.mockup-img-placeholder.blur-mode::after {
  content: '点击看图 (不含压力)';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #3598db;
  font-weight: 600;
  cursor: pointer;
}

.mockup-post-footer {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.mockup-badge {
  background: rgba(53, 152, 219, 0.1);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 9px;
}

/* 装饰光圈 */
.glow-bubble {
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  filter: blur(40px);
  z-index: -1;
}

.glow-bubble-1 {
  bottom: -20px;
  left: -20px;
}

.glow-bubble-2 {
  top: -20px;
  right: -20px;
}

/* 关于我们部分 (首页卡片) */
.about-features {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.about-features-text .section-header {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 2.5rem;
}

.about-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-item {
  display: flex;
  gap: 1rem;
}

.about-item-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.about-item-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #ffffff;
}

.about-item-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
}

/* 历史版本下载组件 */
.version-card-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.version-item-bar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.version-item-bar:hover {
  transform: translateX(5px);
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
}

.version-info-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.version-tag-number {
  background: rgba(53, 152, 219, 0.08);
  color: var(--primary);
  border: 1px solid rgba(53, 152, 219, 0.15);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
}

.version-date {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.version-updates {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 发展历程时间轴 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 31px;
  width: 2px;
  background: linear-gradient(to bottom, #ffffff 0%, rgba(255, 255, 255, 0.15) 100%);
}

.timeline-event {
  position: relative;
  padding-left: 80px;
  margin-bottom: 3.5rem;
}

.timeline-event:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 20px;
  top: 5px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid #ffffff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
  z-index: 2;
  transition: var(--transition);
}

.timeline-event:hover .timeline-dot {
  background: #ffffff;
  transform: scale(1.15);
}

.timeline-year {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.timeline-card:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.timeline-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.timeline-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 下载转化 CTA 区域 */
.download-cta-section {
  padding: 4rem 0 6rem 0;
}

.cta-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 14px;
  padding: 4rem 4.5rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 30px 60px rgba(13, 30, 52, 0.12), 0 10px 20px rgba(13, 30, 52, 0.04);
}

/* Ambient glow effects behind the artwork stack */
.cta-card::before {
  content: '';
  position: absolute;
  top: 20%;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 152, 219, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  filter: blur(20px);
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: 20%;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 152, 219, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  filter: blur(30px);
}

.cta-card-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.cta-tag {
  color: var(--primary);
  background: rgba(53, 152, 219, 0.08);
  border: 1px solid rgba(53, 152, 219, 0.15);
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  display: inline-block;
}

.cta-card-title {
  color: #2c3e50 !important;
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.cta-card-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

/* 信任背书网格 */
.cta-trust-grid {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 1.5rem;
  margin-bottom: 2rem;
  width: 100%;
}

.cta-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
}

.cta-trust-item svg {
  color: var(--success);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* 按钮及辅助信息区域 */
.cta-action-area {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  position: relative;
  z-index: 2;
}

.btn-download-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #3598db 0%, #2482c2 100%);
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 1.1rem 2.5rem;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(53, 152, 219, 0.25);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  cursor: pointer;
  width: fit-content;
}

.btn-download-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(53, 152, 219, 0.4);
  background: linear-gradient(135deg, #4fa3e3 0%, #298dce 100%);
}

.btn-download-primary:active {
  transform: translateY(-1px);
}

.btn-download-primary svg {
  transition: transform 0.3s ease;
}

.btn-download-primary:hover svg {
  transform: translateY(2px);
}

.cta-meta-info {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
}

.cta-meta-info .divider {
  color: rgba(0, 0, 0, 0.15);
}

/* 右侧浮动插画画卡叠放区域 */
.cta-card-visual {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2;
  height: 100%;
}

.artwork-stack {
  position: relative;
  width: 100%;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.artwork-item {
  position: absolute;
  width: 200px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  color: #2c3e50;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.artwork-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.artwork-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
}

.avatar-1 { background: linear-gradient(135deg, #3598db 0%, #2ecc71 100%); }
.avatar-2 { background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%); }
.avatar-3 { background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%); }

.artwork-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.artwork-author {
  font-size: 0.75rem;
  font-weight: 700;
  color: #2c3e50;
}

.artwork-time {
  font-size: 0.65rem;
  color: #7f8c8d;
}

.artwork-img-wrapper {
  position: relative;
  width: 100%;
  height: 145px;
  border-radius: 6px;
  overflow: hidden;
  background: #f1f5f9;
}

.artwork-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.artwork-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #7f8c8d;
}

.artwork-footer .artwork-tag {
  background: #f1f5f9;
  color: #475569;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.65rem;
}

/* 各个卡片的初始定位与偏转 */
.item-1 {
  transform: translate(0, 0) rotate(-2deg);
  z-index: 3;
}

.item-2 {
  transform: translate(-100px, 35px) rotate(-10deg);
  z-index: 2;
}

.item-3 {
  transform: translate(100px, -25px) rotate(8deg);
  z-index: 1;
}

/* Hover 悬浮展开效果 */
.cta-card:hover .item-1 {
  transform: translate(0, -15px) rotate(0deg);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.cta-card:hover .item-2 {
  transform: translate(-130px, 15px) rotate(-15deg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.cta-card:hover .item-3 {
  transform: translate(130px, -15px) rotate(12deg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

/* 敏感内容卡片模糊罩 */
.blur-mask .artwork-img {
  filter: blur(16px);
}

.artwork-blur-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0 8px;
  text-align: center;
}

.artwork-blur-overlay svg {
  color: #3598db;
}

/* 响应式样式 */
@media (max-width: 992px) {
  .cta-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 3.5rem 2.5rem;
    gap: 3rem;
  }
  
  .cta-card-content {
    align-items: center;
    text-align: center;
  }
  
  .cta-card-title {
    font-size: 1.8rem;
  }
  
  .btn-download-primary {
    align-self: center;
  }
  
  .cta-trust-grid {
    justify-content: center;
  }
  
  .cta-meta-info {
    justify-content: center;
  }

  .artwork-stack {
    height: 320px;
  }

  .artwork-item {
    width: 170px;
    padding: 10px;
  }

  .artwork-img-wrapper {
    height: 115px;
  }

  .item-2 {
    transform: translate(-80px, 25px) rotate(-10deg);
  }

  .item-3 {
    transform: translate(80px, -20px) rotate(8deg);
  }

  .cta-card:hover .item-1 {
    transform: translate(0, -10px) rotate(0deg);
  }

  .cta-card:hover .item-2 {
    transform: translate(-100px, 15px) rotate(-14deg);
  }

  .cta-card:hover .item-3 {
    transform: translate(100px, -15px) rotate(12deg);
  }
}

@media (max-width: 576px) {
  .cta-trust-grid {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .cta-card-visual {
    display: none; /* 在极小屏上隐藏插画卡叠放，突出下载按钮 */
  }
}

/* FAQ 常见问题折叠面板 */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.faq-item:hover {
  border-color: var(--border-color-hover);
}

.faq-question {
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  user-select: none;
  font-size: 1.05rem;
}

.faq-answer {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px; /* 大于可能的内容高度 */
  padding: 0 2rem 1.5rem 2rem;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: var(--transition);
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background-color: var(--text-secondary);
  transition: var(--transition);
}

.faq-icon::before {
  width: 14px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
}

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

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background-color: var(--primary);
}

/* 页脚 (Footer) */
.footer {
  background: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 4rem 0 2rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-brand p {
  color: var(--text-muted);
  max-width: 320px;
  font-size: 0.85rem;
}

.footer-links-col h5 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-list a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links-list a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-icp {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-icp:hover {
  color: var(--primary-light);
}

/* 移动端吸底浮动按钮 */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 0.75rem 1.25rem;
  z-index: 90;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 -5px 25px rgba(0,0,0,0.5);
}

.mobile-sticky-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mobile-sticky-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.mobile-sticky-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* 内页（Subpages）专用样式 */
.page-hero {
  padding: 4rem 0 3rem 0;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
}

.page-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.page-content-wrapper {
  padding: 4rem 0;
}

.rich-content {
  max-width: 800px;
  margin: 0 auto;
  background: #ffffff;
  padding: 3.5rem;
  border-radius: var(--radius-lg);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--text-primary);
}

.rich-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  border-left: 4px solid var(--primary);
  padding-left: 0.75rem;
}

.rich-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.rich-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.rich-content ul,
.rich-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
}

.rich-content li {
  margin-bottom: 0.5rem;
}

/* 表格样式 (历史版本详情等) */
.content-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.content-table th,
.content-table td {
  padding: 1rem 1.25rem;
  text-align: left;
}

.content-table th {
  background: rgba(255, 255, 255, 0.03);
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.content-table td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
}

.content-table tr:last-child td {
  border-bottom: none;
}

.content-table tr:hover td {
  background: rgba(255, 255, 255, 0.01);
}

/* 用户协议/隐私政策弹出框 (Modal) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 10, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #0d121f;
  border: 1px solid var(--border-color-hover);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 30px rgba(53, 152, 219, 0.15);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.75rem;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 2rem;
  overflow-y: auto;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.modal-body h4 {
  color: var(--text-primary);
  margin: 1.5rem 0 0.5rem 0;
  font-weight: 600;
}

.modal-body h4:first-child {
  margin-top: 0;
}

.modal-body p {
  margin-bottom: 1rem;
}

/* 响应式媒体查询 */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-card-large {
    grid-column: span 2;
  }
  .about-features {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    flex-direction: column;
    padding: 2rem 0;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 99;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-actions {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 4rem;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-meta {
    justify-content: center;
  }

  .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-card-large {
    grid-column: span 1;
  }

  .version-item-bar {
    flex-direction: column;
    gap: 1.25rem;
    align-items: flex-start;
  }

  .version-info-meta {
    width: 100%;
    justify-content: space-between;
  }

  .version-updates {
    max-width: 100%;
    white-space: normal;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    align-items: center;
    padding-bottom: 80px; /* 留出手机吸底条的空间 */
  }

  .mobile-sticky-bar {
    display: flex;
  }
}

/* poipiku.com 核心功能实时模拟器样式 */
.simulator-section {
  background: transparent;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 6rem 0;
}
.sim-tabs-container {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}
.sim-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px;
  border-radius: var(--radius-md);
  gap: 4px;
  backdrop-filter: blur(10px);
}
.sim-tab-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.sim-tab-btn:hover {
  color: #ffffff;
}
.sim-tab-btn.active {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}
.sim-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.85rem;
  align-items: start;
}
.sim-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  padding: 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  height: 275px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.sim-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(53, 152, 219, 0.05);
}
.sim-post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sim-user-info {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sim-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: #fff;
}
.sim-username {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}
.sim-post-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.sim-badge-container {
  display: flex;
  gap: 6px;
}
.sim-badge {
  background: rgba(53, 152, 219, 0.08);
  color: var(--primary);
  border: 1px solid rgba(53, 152, 219, 0.15);
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}
.sim-image-area {
  position: relative;
  width: 100%;
  height: 132px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #f0f7fd 0%, #e1f0fa 100%);
  border: 1px dashed rgba(53, 152, 219, 0.25);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.sim-artwork {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.sim-real-art {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
/* 纯 CSS 矢量插画艺术效果 */
.art-gradient-1 {
  background: radial-gradient(circle at center, #3598db 0%, transparent 70%);
  width: 82px;
  height: 82px;
  border-radius: 50%;
  filter: blur(15px);
  opacity: 0.6;
}
.art-gradient-2 {
  background: linear-gradient(45deg, #e74c3c, #9b59b6);
  width: 62px;
  height: 62px;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  animation: morphArt 8s ease-in-out infinite alternate;
}
.art-gradient-3 {
  background: linear-gradient(135deg, #f1c40f, #e67e22);
  width: 66px;
  height: 66px;
  border-radius: 50% 50% 30% 70% / 50% 60% 40% 50%;
}
.art-doodle {
  width: 88px;
  height: 6px;
  background: var(--primary);
  border-radius: 3px;
  position: relative;
  transform: rotate(-15deg);
}
.art-doodle::before, .art-doodle::after {
  content: '';
  position: absolute;
  height: 6px;
  background: var(--primary-light);
  border-radius: 3px;
}
.art-doodle::before {
  width: 54px;
  top: 15px;
  left: 20px;
  transform: rotate(10deg);
}
.art-doodle::after {
  width: 68px;
  top: -15px;
  left: -10px;
  transform: rotate(-5deg);
}

@keyframes morphArt {
  0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
  100% { border-radius: 50% 50% 30% 70% / 50% 60% 40% 50%; }
}

/* 模糊遮罩 */
.sim-blur-mask {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 7px;
  color: var(--primary);
  cursor: pointer;
  z-index: 5;
  transition: opacity 0.4s ease;
  padding: 0.75rem;
  text-align: center;
}
.sim-blur-mask svg {
  color: var(--primary);
  filter: drop-shadow(0 0 8px rgba(53, 152, 219, 0.2));
  animation: lockPulse 2s infinite;
}
.sim-blur-mask span {
  font-size: 0.72rem;
  font-weight: 700;
  color: #2c3e50;
  letter-spacing: 0;
  line-height: 1.35;
}
.sim-blur-mask p {
  font-size: 0.66rem;
  color: #7f8c8d;
}
.sim-card.unblurred .sim-blur-mask {
  opacity: 0;
  pointer-events: none;
}
@keyframes lockPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.sim-post-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sim-post-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 8px;
  margin-top: auto;
}
.sim-emojis-bar {
  display: flex;
  gap: 5px;
  width: 100%;
}
.sim-emoji-btn {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 3px 5px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 2px;
  transition: var(--transition);
  position: relative;
}
.sim-emoji-btn:hover {
  background: rgba(53, 152, 219, 0.1);
  border-color: var(--border-color-hover);
  color: var(--text-primary);
}
.sim-emoji-btn:active {
  transform: scale(0.9);
}
.sim-count {
  font-size: 0.66rem;
  font-weight: 600;
}

/* 浮动表情粒子效果 */
.sim-floating-emoji {
  position: absolute;
  pointer-events: none;
  z-index: 10;
  animation: floatEmojiUp 1s cubic-bezier(0.18, 0.89, 0.32, 1.28) forwards;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.sim-floating-emoji svg {
  width: 24px;
  height: 24px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}
@keyframes floatEmojiUp {
  0% {
    transform: translateY(0) scale(0.5);
    opacity: 1;
  }
  100% {
    transform: translateY(-80px) translateX(var(--tx, 0px)) scale(1.2);
    opacity: 0;
  }
}

@media (max-width: 900px) {
  .feed-grid, .info-feed-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sim-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 600px) {
  .feed-grid, .info-feed-grid {
    grid-template-columns: 1fr;
  }
  .sim-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }
  .sim-card {
    min-width: 0;
    padding: 0.7rem;
    gap: 8px;
    border-radius: 9px;
  }
  .sim-image-area {
    height: 132px;
  }
  .post-author-row {
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 4px;
  }
  .author-info {
    min-width: 0;
    gap: 6px;
  }
  .sim-avatar,
  .author-avatar {
    width: 28px !important;
    height: 28px !important;
    flex: 0 0 28px;
    font-size: 10px;
  }
  .author-meta {
    min-width: 0;
  }
  .author-name,
  .author-handle,
  .post-time-badge,
  .sim-post-title,
  .sim-badge {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .author-name {
    max-width: 86px;
    font-size: 0.78rem;
  }
  .author-handle {
    max-width: 86px;
    font-size: 0.66rem;
  }
  .post-time-badge {
    max-width: 48px;
    flex: 0 1 auto;
    font-size: 0.64rem;
    text-align: right;
  }
  .sim-blur-mask {
    gap: 6px;
    padding: 0.7rem;
  }
  .sim-blur-mask svg {
    width: 20px;
    height: 20px;
  }
  .sim-blur-mask span {
    font-size: 0.72rem;
    line-height: 1.3;
    letter-spacing: 0;
  }
  .sim-blur-mask p {
    display: none;
  }
  .sim-post-title {
    font-size: 0.78rem;
  }
  .sim-post-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
    padding-top: 8px;
  }
  .sim-emojis-bar {
    gap: 5px;
    width: 100%;
  }
  .sim-emoji-btn {
    min-width: 0;
    padding: 3px 5px;
    gap: 2px;
    font-size: 0.72rem;
  }
  .sim-emoji-btn svg {
    width: 12px;
    height: 12px;
  }
  .sim-count {
    font-size: 0.66rem;
  }
  .sim-badge {
    max-width: 100%;
    font-size: 0.65rem;
    padding: 2px 5px;
  }
  .sim-card .btn-sm {
    min-height: 34px;
    padding: 0.55rem 0.5rem;
    font-size: 0.72rem;
  }
  .community-banner {
    padding: 1.5rem;
  }
  .banner-logo-mark {
    width: 62px;
    height: 62px;
    border-radius: 14px;
    margin-bottom: 1rem;
  }
  .banner-logo-mark img {
    border-radius: 10px;
  }
  .banner-title {
    font-size: 1.5rem;
  }
}

/* ==========================================
   全新 Poipiku 社区化瀑布流与页面改版样式
   ========================================== */

/* 社区化公告和头部横幅 */
.community-banner {
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
}

.community-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(53, 152, 219, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.banner-logo-mark {
  width: 76px;
  height: 76px;
  border-radius: 16px;
  padding: 8px;
  margin-bottom: 1.35rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(53, 152, 219, 0.14);
  box-shadow: 0 18px 36px rgba(53, 152, 219, 0.14);
}

.banner-logo-mark img {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  display: block;
  object-fit: cover;
}

.banner-title {
  font-size: 2rem;
  font-weight: 800;
  color: #2c3e50;
  margin-bottom: 0.75rem;
}

.banner-title span {
  color: var(--primary);
}

.banner-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 800px;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* 社区过滤控制栏 */
.feed-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.9);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
  flex-wrap: wrap;
  gap: 1rem;
}

.feed-filter-pills {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
}

.feed-filter-pills::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.filter-pill {
  padding: 6px 16px;
  border-radius: 20px;
  background: #f1f5f9;
  color: #64748b;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.filter-pill:hover {
  background: #e2e8f0;
  color: #334155;
}

.filter-pill.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(53, 152, 219, 0.2);
}

.feed-search {
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 6px 15px;
  border-radius: 30px;
  width: 250px;
}

.feed-search input {
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.85rem;
  width: 100%;
  color: #334155;
  margin-left: 6px;
}

/* 官方发布帖卡片 */
.post-author-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.author-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.author-name {
  font-weight: 700;
  font-size: 0.78rem;
  color: #2c3e50;
  max-width: 88px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.author-handle {
  font-size: 0.66rem;
  color: var(--text-muted);
  max-width: 88px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-time-badge {
  flex: 0 0 auto;
  max-width: 48px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
  font-size: 0.64rem;
  color: var(--text-muted);
}

/* 内页容器 */
.subpage-container {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

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

.announcement-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}

.announcement-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(53, 152, 219, 0.08);
  border-color: rgba(53, 152, 219, 0.2);
}

.announcement-banner-img {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #ebf5fb 0%, #d4e6f1 100%);
  border: 1px solid rgba(53, 152, 219, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: var(--primary);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 1px;
}

.announcement-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.announcement-list {
  padding-left: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.announcement-list li {
  line-height: 1.5;
}

.announcement-list li strong {
  color: #2c3e50;
}

.card-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 12px;
  margin-top: 8px;
}

.card-download-link {
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.card-download-link:hover {
  color: var(--primary-hover);
}

/* 首页展开式 FAQ */
.faq-new-section {
  padding: 5.5rem 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%),
    var(--bg-dark);
}

.faq-grid-layout {
  display: grid;
  grid-template-columns: minmax(250px, 0.82fr) minmax(0, 1.8fr);
  gap: 2rem;
  align-items: start;
}

.faq-intro-column {
  position: sticky;
  top: 96px;
}

.faq-main-title {
  margin: 0.9rem 0 1rem;
  color: #ffffff;
  font-size: clamp(2rem, 3.6vw, 3.2rem);
  line-height: 1.08;
  font-weight: 850;
}

.faq-main-desc {
  color: rgba(255, 255, 255, 0.86);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 430px;
}

.faq-support-card {
  margin-top: 2rem;
  padding: 1.35rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #ffffff;
  box-shadow: 0 20px 45px rgba(31, 111, 188, 0.18);
}

.support-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--primary);
  background: #ffffff;
  margin-bottom: 1rem;
}

.faq-support-card h4 {
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 0.45rem;
}

.faq-support-card p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
  line-height: 1.65;
}

.support-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.1rem;
}

.support-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 36px;
  padding: 0.55rem 0.78rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary-hover);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 750;
  transition: var(--transition);
}

.support-link-btn:hover {
  transform: translateY(-2px);
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(31, 111, 188, 0.18);
}

.faq-answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.faq-answer-card {
  min-height: 100%;
  padding: 1.35rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 18px 38px rgba(31, 111, 188, 0.12);
}

.faq-answer-card-featured,
.faq-answer-card-wide {
  grid-column: 1 / -1;
}

.faq-card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.faq-card-index {
  color: rgba(44, 62, 80, 0.24);
  font-size: 1.65rem;
  line-height: 1;
  font-weight: 850;
}

.faq-card-label {
  padding: 0.28rem 0.62rem;
  border-radius: 999px;
  background: rgba(53, 152, 219, 0.1);
  color: var(--primary-hover);
  font-size: 0.78rem;
  font-weight: 800;
}

.faq-answer-card h3 {
  color: var(--text-primary);
  font-size: 1.08rem;
  line-height: 1.45;
  margin-bottom: 0.72rem;
}

.faq-answer-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.78;
}

.faq-answer-card b {
  color: var(--text-primary);
}

.faq-answer-card a {
  color: var(--primary-hover);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 980px) {
  .faq-grid-layout {
    grid-template-columns: 1fr;
  }

  .faq-intro-column {
    position: static;
  }

  .faq-main-desc {
    max-width: 720px;
  }
}

@media (max-width: 680px) {
  .faq-new-section {
    padding: 4rem 0;
  }

  .faq-answer-grid {
    grid-template-columns: 1fr;
  }

  .faq-answer-card {
    padding: 1.15rem;
  }

  .support-links {
    flex-direction: column;
  }

  .support-link-btn {
    justify-content: center;
    width: 100%;
  }
}

/* 折叠解答器 */
.qa-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.qa-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
  transition: var(--transition);
}

.qa-trigger {
  width: 100%;
  padding: 1.25rem;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  color: #2c3e50;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.qa-trigger::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.qa-card.open .qa-trigger::after {
  content: '-';
  transform: rotate(180deg);
}

.qa-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: #fafbfc;
  padding: 0 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.qa-card.open .qa-content {
  max-height: 1000px;
  padding: 1.25rem;
  border-top: 1px solid rgba(0, 0, 0, 0.04);
}

@media (max-width: 1000px) {
  .info-feed-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 650px) {
  .info-feed-grid {
    grid-template-columns: 1fr;
  }
}

/* 互动画板区域 (Interactive Drawing Board) */
.drawing-board-section {
  padding: 4rem 0;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  background: rgba(255, 255, 255, 0.04);
}

.drawing-board-container {
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.05);
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding-bottom: 1rem;
}

.board-title-group h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.board-title-group p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.board-body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .board-body {
    grid-template-columns: 1fr;
  }
}

.canvas-wrapper {
  background: #f8fafc;
  border: 2px dashed rgba(53, 152, 219, 0.2);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  height: 380px;
  cursor: crosshair;
}

#drawingCanvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.board-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: #f8fafc;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.toolbar-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toolbar-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.color-presets {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.color-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.color-btn:hover,
.color-btn.active {
  transform: scale(1.15);
  border-color: var(--primary);
}

.brush-sizes {
  display: flex;
  align-items: center;
  gap: 12px;
}

.size-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  outline: none;
  background: #cbd5e1;
  accent-color: var(--primary);
  cursor: pointer;
}

.size-preview {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
}

.brush-preview-dot {
  background: #000000;
  border-radius: 50%;
  transition: transform 0.1s ease;
}

.board-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.board-actions .btn {
  width: 100%;
  justify-content: center;
  padding: 0.75rem 1rem;
}

.posting-loader {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 10;
}

.posting-loader.active {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================
   新增首页特色与新手引导版块样式
   ========================================== */

.feature-grid-section {
  padding: 4rem 0;
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(53, 152, 219, 0.12);
  border-color: rgba(53, 152, 219, 0.3);
}

.feature-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--primary-glow);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.feature-card:hover .feature-card-icon {
  transform: scale(1.1);
  background: var(--primary);
  color: #ffffff;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #2c3e50;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 引导版块 */
.workflow-section {
  padding: 4rem 0;
  background: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.workflow-container {
  background: #fafbfc;
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
}

.workflow-steps {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  position: relative;
}

.workflow-steps::before {
  content: '';
  position: absolute;
  top: 35px;
  left: 50px;
  right: 50px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-glow) 0%, var(--primary) 50%, var(--primary-glow) 100%);
  z-index: 1;
}

.workflow-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
}

.step-num-circle {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 15px rgba(53, 152, 219, 0.15);
  transition: var(--transition);
}

.step-num-circle svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
  transition: var(--transition);
}

.workflow-step:hover .step-num-circle {
  transform: translateY(-4px) scale(1.05);
  background: var(--primary);
  border-color: var(--primary);
}

.workflow-step:hover .step-num-circle svg {
  color: #ffffff;
}

.workflow-step h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.workflow-step p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 240px;
}

@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .workflow-steps {
    flex-direction: column;
    gap: 40px;
  }
  .workflow-steps::before {
    display: none;
  }
}

@media (max-width: 600px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* 颜色对比度覆盖 - 确保白色背景下的标题和标签可见 */
.workflow-section .section-title {
  color: #2c3e50;
  text-shadow: none;
}

.workflow-section .section-tag {
  color: var(--primary);
  background: var(--primary-glow);
  border-color: rgba(53, 152, 219, 0.2);
}