/* ==========================================================================
   Anyland云机场 (anyland1.xyz) - 官方落地页与文章矩阵全套样式表
   支持 100% 响应式移动端自适应、暗黑玻璃拟态、高转化率 UI 及 SEO 呈现
   ========================================================================== */

:root {
  --bg-dark: #120305;
  --bg-card: rgba(38, 8, 12, 0.78);
  --bg-card-hover: rgba(58, 14, 20, 0.88);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-highlight: rgba(244, 63, 94, 0.45);
  
  --primary: #ff3b5c;
  --primary-gradient: linear-gradient(135deg, #ff3b5c 0%, #ef4444 40%, #f43f5e 75%, #ff758f 100%);
  --accent-glow: rgba(255, 59, 92, 0.3);
  --accent-pink: #ff758f;
  --accent-green: #34d399;
  
  --text-main: #fff0f2;
  --text-sub: #cbd5e1;
  --text-muted: #94a3b8;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 10px 30px -10px rgba(239, 68, 68, 0.4);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #4a0d14 0%, #120305 75%);
  min-height: 100vh;
}

/* 常用基础类 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 20px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

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

/* 按钮通用组件 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -5px rgba(56, 189, 248, 0.5);
  opacity: 0.96;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  font-weight: 600;
  padding: 13px 28px;
  border-radius: 50px;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-highlight);
  color: #fff;
}

/* Header Navbar */
.header-dock {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 1200px;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: rgba(28, 6, 9, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.15rem;
}

.brand-logo img {
  width: 34px;
  height: 34px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding-top: 160px;
  padding-bottom: 90px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 30px;
  font-size: 0.88rem;
  color: var(--primary);
  margin-bottom: 24px;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* Hero Feature Card Right */
.hero-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-glow);
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 600;
}

.hero-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-card-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.hero-card-list .icon {
  font-size: 1.3rem;
  background: rgba(255, 255, 255, 0.05);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-card-list strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 2px;
}

.hero-card-list span {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* Node Ping Monitor Section */
.ping-card-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
}

.ping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.ping-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.ping-item:hover {
  border-color: var(--border-highlight);
  background: rgba(30, 41, 59, 0.6);
}

.ping-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ping-flag {
  font-size: 1.6rem;
}

.ping-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.ping-detail {
  font-size: 0.78rem;
  color: var(--text-sub);
}

.ping-badge {
  text-align: right;
}

.ping-val {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--accent-green);
  transition: opacity 0.2s;
}

.ping-bar-bg {
  width: 60px;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: 4px;
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: var(--accent-green);
  border-radius: 2px;
}

/* Bento Grid Features Section */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

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

.bento-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.bento-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(255, 59, 92, 0.12);
  border: 1px solid rgba(255, 59, 92, 0.25);
  padding: 4px 12px;
  border-radius: 20px;
}

.bento-icon {
  font-size: 2.2rem;
}

.bento-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.bento-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(65, 12, 18, 0.95) 0%, rgba(30, 6, 10, 0.95) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 15px 40px -10px rgba(255, 59, 92, 0.45);
}

.featured-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-subtitle {
  font-size: 0.82rem;
  color: var(--text-sub);
  min-height: 38px;
  margin-bottom: 20px;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 24px;
}

.plan-price .currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.plan-price .period {
  font-size: 0.9rem;
  color: var(--text-sub);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.plan-features .check {
  color: var(--accent-green);
  font-weight: 800;
}

/* Articles SEO Section Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #ff5270;
  background: rgba(255, 59, 92, 0.18);
  border: 1px solid rgba(255, 59, 92, 0.35);
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.article-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-card p {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.read-more-link {
  color: #fff;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
  transition: var(--transition);
}

.article-card:hover .read-more-link {
  transform: translateX(3px);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.55);
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
  border: 2px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.5);
}

.user-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-toggle-icon {
  font-size: 0.85rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-answer {
  padding: 0 24px 20px 24px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  display: none;
}

.faq-item.active {
  border-color: var(--primary);
  background: rgba(55, 10, 16, 0.85);
  box-shadow: 0 8px 25px rgba(255, 59, 92, 0.2);
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
}

/* Footer Section & Core Task 2 PBN Backlink Pipeline */
.site-footer {
  background: #0c0204;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 800;
}

.footer-brand img {
  width: 30px;
  height: 30px;
}

.footer-nav {
  display: flex;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--primary);
}

/* 【核心任务 2】低调美观小字号友情链接区（精准 PBN 权重输血管道） */
.friend-links-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 30px;
  border: 1px dashed rgba(255, 255, 255, 0.06);
  margin-top: 10px;
}

.friend-links-title {
  font-weight: 600;
  color: var(--text-muted);
}

.friend-links-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.friend-links-group a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.8rem;
  transition: var(--transition);
  opacity: 0.85;
}

.friend-links-group a:hover {
  color: var(--primary);
  opacity: 1;
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 文章详情页专属样式 */
.article-header-section {
  padding-top: 150px;
  padding-bottom: 40px;
  background: rgba(15, 23, 42, 0.5);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumbs {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumbs a {
  color: var(--text-sub);
  text-decoration: none;
}

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

.article-main-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-post-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-sub);
  flex-wrap: wrap;
}

.article-container {
  padding: 50px 20px 80px 20px;
  max-width: 900px;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin: 28px 0 14px 0;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-body blockquote {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
  color: var(--text-main);
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  margin: 40px 0;
  box-shadow: var(--shadow-glow);
}

.article-cta-box h4 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.article-cta-box p {
  color: var(--text-sub);
  margin-bottom: 20px;
}

/* 响应式适配 Responsive Breakpoints */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-card.span-2 {
    grid-column: span 2;
  }
  .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .nav-links {
    position: fixed;
    top: 80px;
    left: 20px;
    right: 20px;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    flex-direction: column;
    padding: 24px;
    display: none;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .pricing-grid, .bento-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .bento-card.span-2 {
    grid-column: span 1;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .article-main-title {
    font-size: 1.6rem;
  }
}

/* ==========================================================================
   客户端下载弹窗与下载中心专有样式 (Anyland Red Glow Theme)
   ========================================================================== */

/* 防止弹窗打开时页面背景滚动 */
body.modal-open {
  overflow: hidden !important;
}

/* 下载弹窗遮罩层 */
.download-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(10, 2, 4, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.download-modal-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

/* 弹窗卡片 */
.download-modal-card {
  background: #190508;
  border: 1px solid var(--border-highlight);
  border-radius: 20px;
  width: 100%;
  max-width: 520px;
  padding: 2.2rem;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 35px rgba(255, 59, 92, 0.25);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 90vh;
  overflow-y: auto;
}

.download-modal-overlay.is-active .download-modal-card {
  transform: translateY(0) scale(1);
}

/* 关闭按钮 */
.modal-close-btn {
  position: absolute;
  top: 1.1rem;
  right: 1.25rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  font-size: 1.5rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  line-height: 1;
}

.modal-close-btn:hover {
  background: rgba(255, 59, 92, 0.25);
  color: #ffffff;
  border-color: var(--primary);
  transform: rotate(90deg);
}

/* 弹窗头部 */
.modal-header {
  text-align: center;
  margin-bottom: 1.25rem;
}

.modal-badge-icon {
  font-size: 2.2rem;
  margin-bottom: 0.35rem;
}

.modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.4rem;
  letter-spacing: -0.5px;
}

.modal-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 购买意向卡片 */
.modal-intent-box {
  background: rgba(255, 59, 92, 0.1);
  border: 1px dashed rgba(255, 59, 92, 0.4);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.modal-intent-tag {
  font-size: 0.88rem;
  font-weight: 700;
  color: #fecaca;
}

.modal-plan-target {
  color: #ff758f;
  font-weight: 800;
}

.modal-intent-note {
  font-size: 0.8rem;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
}

/* 弹窗平台列表（仅 Android 与 iOS，严格遵循规则 17） */
.modal-platform-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 1.25rem;
}

.modal-platform-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.modal-platform-item:hover,
.modal-platform-item.is-recommended {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(255, 59, 92, 0.25);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.platform-item-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.platform-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.platform-meta h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.platform-meta p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

.platform-badge {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  display: none;
}

.modal-platform-item.is-recommended .platform-badge,
.download-platform-card.is-recommended .download-card-badge {
  display: inline-block;
}

.platform-action-btn {
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(255, 59, 92, 0.4);
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.modal-platform-item:hover .platform-action-btn {
  transform: scale(1.05);
}

/* 弹窗底部提示 */
.modal-footer {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1rem;
}

.modal-footer-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   /download/ 下载中心专有样式
   ========================================================================== */
.download-page-hero {
  padding: 70px 0 30px;
  text-align: center;
}

.download-tagline {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  background: rgba(255, 59, 92, 0.15);
  border: 1px solid rgba(255, 59, 92, 0.4);
  color: var(--accent-pink);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.download-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 36px;
}

.download-platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.download-platform-card:hover,
.download-platform-card.is-recommended {
  border-color: var(--primary);
  box-shadow: 0 16px 40px rgba(255, 59, 92, 0.25);
  transform: translateY(-4px);
}

.download-card-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  display: none;
}

.platform-header-box {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.platform-main-icon {
  font-size: 2.8rem;
}

.platform-title-box h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.platform-os-req {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.platform-features-ul {
  list-style: none;
  margin: 20px 0 28px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.platform-features-ul li {
  font-size: 0.92rem;
  color: var(--text-sub);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.platform-features-ul li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
}

.btn-download-primary {
  display: block;
  text-align: center;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(255, 59, 92, 0.4);
  transition: var(--transition);
  text-decoration: none;
}

.btn-download-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 59, 92, 0.6);
  color: #fff;
}

.steps-section {
  padding: 80px 0;
  background: rgba(18, 5, 8, 0.4);
}

.steps-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  text-align: center;
  position: relative;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 15px rgba(255, 59, 92, 0.4);
}

.step-card h4 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .download-grid-2 {
    grid-template-columns: 1fr;
  }
  .steps-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .steps-grid-4 {
    grid-template-columns: 1fr;
  }
}