/* ==========================================================================
   番茄云 TomatoCloud (tomatocloud.sbs) 视觉设计系统
   设计风格：暗夜极客黑 + 番茄活力红 + 玻璃拟态 + 动态微特效
   ========================================================================== */

:root {
  --bg-dark: #120608;
  --bg-card: rgba(35, 16, 20, 0.82);
  --bg-card-hover: rgba(50, 22, 28, 0.9);
  --border-color: rgba(255, 82, 82, 0.35);
  --border-hover: rgba(255, 82, 82, 0.7);
  
  --primary-red: #ff3b30;
  --primary-hover: #ff5252;
  --primary-glow: rgba(255, 59, 48, 0.5);
  --accent-orange: #ff9500;
  --accent-green: #34c759;
  
  --text-main: #f5f6fa;
  --text-muted: #d0c2c5;
  --text-dim: #9e8a8e;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

body {
  background-color: #120608;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(255, 59, 48, 0.35) 0%, transparent 60%),
    radial-gradient(circle at 90% 40%, rgba(229, 57, 53, 0.28) 0%, transparent 50%),
    radial-gradient(circle at 10% 70%, rgba(255, 149, 0, 0.22) 0%, transparent 50%),
    radial-gradient(circle at 50% 100%, rgba(217, 44, 32, 0.3) 0%, transparent 65%),
    url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ff3b30' fill-opacity='0.12'%3E%3Cpath d='M50 15c15 0 28 12 28 28 0 18-22 38-28 41-6-3-28-23-28-41 0-16 13-28 28-28zm-3-8c3 0 5 3 4 5-3 0-5 2-6 4-2 3-2 5-2 8 0 1-3 3-4 1s-2-4 0-8c2-3 5-7 8-10z'/%3E%3C/g%3E%3C/svg%3E");
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* 显眼清晰的全屏浮动番茄背景 */
.tomato-bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.tomato-floating-item {
  position: absolute;
  font-size: 3.5rem;
  opacity: 0.65;
  filter: drop-shadow(0 0 20px rgba(255, 59, 48, 0.8)) drop-shadow(0 0 35px rgba(255, 149, 0, 0.4));
  animation: floatTomato 14s infinite ease-in-out;
  user-select: none;
}

.tomato-floating-item:nth-child(1) { top: 8%; left: 4%; animation-delay: 0s; font-size: 4.5rem; opacity: 0.75; }
.tomato-floating-item:nth-child(2) { top: 18%; right: 5%; animation-delay: 2.5s; font-size: 3.8rem; opacity: 0.7; }
.tomato-floating-item:nth-child(3) { top: 40%; left: 3%; animation-delay: 5s; font-size: 4rem; opacity: 0.8; }
.tomato-floating-item:nth-child(4) { top: 58%; right: 4%; animation-delay: 1.5s; font-size: 4.2rem; opacity: 0.75; }
.tomato-floating-item:nth-child(5) { top: 78%; left: 6%; animation-delay: 7s; font-size: 3.5rem; opacity: 0.65; }
.tomato-floating-item:nth-child(6) { top: 85%; right: 8%; animation-delay: 3.5s; font-size: 4.8rem; opacity: 0.8; }
.tomato-floating-item:nth-child(7) { top: 30%; left: 92%; animation-delay: 6s; font-size: 3.2rem; opacity: 0.6; }
.tomato-floating-item:nth-child(8) { top: 68%; left: 48%; animation-delay: 4s; font-size: 3.6rem; opacity: 0.5; }

@keyframes floatTomato {
  0% { transform: translateY(0px) rotate(0deg) scale(1); }
  50% { transform: translateY(-35px) rotate(18deg) scale(1.12); }
  100% { transform: translateY(0px) rotate(0deg) scale(1); }
}

/* 鼠标尾翼 Canvas 绝对定位 */
#trail-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* 容器 */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-red) 0%, #d32f2f 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ff5252 0%, var(--primary-red) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 59, 48, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 59, 48, 0.15);
  border-color: var(--primary-red);
  color: #ffffff;
  transform: translateY(-2px);
}

/* 顶部导航栏 */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #ff3b30, #ff8a80);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px var(--primary-glow);
  position: relative;
}

.logo-icon::before {
  content: '🍅';
  font-size: 20px;
}

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

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

/* Hero Section */
.hero {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 30px;
  background: rgba(255, 59, 48, 0.12);
  border: 1px solid rgba(255, 59, 48, 0.3);
  color: #ff6b6b;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #c0c5d0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title highlight {
  background: linear-gradient(135deg, #ff3b30 0%, #ff9500 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.hero-features-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 40px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.hero-feature-item i {
  color: var(--primary-red);
  font-size: 1.2rem;
}

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

.section-tag {
  color: var(--primary-red);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* 核心优势网格 */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(255, 59, 48, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary-red);
}

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

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

/* 价格区域 - 要求格式弄成一排 (Horizontal Pricing Row) */
.pricing-section {
  padding: 80px 0;
  background: rgba(15, 17, 26, 0.6);
}

.pricing-switch {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

.pricing-switch span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

.pricing-switch span.active {
  color: var(--text-main);
}

.switch-btn {
  position: relative;
  width: 60px;
  height: 32px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  border: none;
  cursor: pointer;
  padding: 4px;
  transition: var(--transition);
}

.switch-btn::before {
  content: '';
  display: block;
  width: 24px;
  height: 24px;
  background: var(--primary-red);
  border-radius: 50%;
  transition: var(--transition);
}

.switch-btn.yearly::before {
  transform: translateX(28px);
}

.badge-discount {
  background: linear-gradient(135deg, #ff9500, #ff3b30);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 6px;
}

/* 关键：价格卡片横向排成一排 (Flex row) */
.pricing-row {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: stretch;
  gap: 20px;
  width: 100%;
}

.pricing-card {
  flex: 1 1 0px;
  min-width: 240px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(12px);
}

.pricing-card.popular {
  border-color: var(--primary-red);
  background: linear-gradient(180deg, rgba(255, 59, 48, 0.12) 0%, rgba(22, 24, 35, 0.85) 100%);
  box-shadow: 0 8px 30px rgba(255, 59, 48, 0.2);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-red);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-red), #e53935);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  box-shadow: 0 4px 12px var(--primary-glow);
  white-space: nowrap;
}

.pricing-header h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.pricing-header p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.pricing-amount {
  font-size: 2rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 20px;
}

.pricing-amount span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
}

.pricing-features li {
  font-size: 0.88rem;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li i {
  color: var(--accent-green);
  font-size: 0.95rem;
}

/* 文章矩阵区域 */
.articles-section {
  padding: 80px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
}

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

.article-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-tag {
  background: rgba(255, 59, 48, 0.15);
  color: var(--primary-red);
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.article-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-card h3 a {
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

.article-card h3 a:hover {
  color: var(--primary-red);
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
  font-size: 0.88rem;
}

.read-more {
  color: var(--primary-red);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.read-more:hover {
  gap: 8px;
}

/* 用户评价区域 */
.reviews-section {
  padding: 80px 0;
  background: rgba(15, 17, 26, 0.5);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-hover);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff3b30, #ff9500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
}

.review-user h4 {
  font-size: 1rem;
  font-weight: 700;
}

.review-user span {
  font-size: 0.8rem;
  color: var(--accent-green);
  display: block;
}

.review-rating {
  color: #ffc107;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* FAQ 区域 */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.08rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-question i {
  color: var(--primary-red);
  transition: var(--transition);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: rgba(0, 0, 0, 0.2);
}

.faq-answer p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 文章详情页专用样式 */
.article-detail-container {
  max-width: 900px;
  margin: 40px auto 80px;
  padding: 0 20px;
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 30px;
}

.article-header h1 {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
  color: #ffffff;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #d1d5db;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 16px;
  border-left: 4px solid var(--primary-red);
  padding-left: 12px;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f3f4f6;
  margin: 28px 0 12px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body code {
  background: rgba(255, 59, 48, 0.15);
  color: #ff8a80;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(255, 59, 48, 0.2) 0%, rgba(22, 24, 35, 0.9) 100%);
  border: 1px solid var(--primary-red);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  margin: 50px 0;
}

.article-cta-box h3 {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 12px;
}

.article-cta-box p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.internal-nav-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 60px;
}

.internal-nav-box h4 {
  font-size: 1.1rem;
  color: var(--primary-red);
  margin-bottom: 16px;
}

.internal-links-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  list-style: none;
}

.internal-links-list a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.internal-links-list a:hover {
  color: var(--primary-red);
}

/* 【核心任务 2】：页脚 PBN 权重输血管道（智能融合） */
footer.pbn-footer {
  background: #07080b;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 50px 0 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-brand p {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 320px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary-red);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}

/* PBN 友情链接输血管道核心区 (符合规则 2 要求：低调、美观、小字号、与原页面深度融合) */
.pbn-links-bar {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px 18px;
  font-size: 0.8rem;
}

.pbn-links-label {
  color: var(--text-dim);
  font-weight: 600;
}

.pbn-links-bar a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  opacity: 0.75;
}

.pbn-links-bar a:hover {
  color: var(--primary-red);
  opacity: 1;
  text-decoration: underline;
}

/* 响应式适配与增强 */
@media (max-width: 1024px) {
  .pricing-row {
    flex-wrap: wrap;
  }
  .pricing-card {
    flex: 1 1 calc(50% - 20px);
    min-width: 280px;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-6px);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .header {
    padding: 12px 0;
  }
  .hero {
    padding: 60px 0 40px;
  }
  .hero-title {
    font-size: clamp(1.8rem, 6vw, 2.4rem);
    line-height: 1.25;
  }
  .hero-subtitle {
    font-size: 1rem;
    padding: 0 4px;
    margin-bottom: 28px;
  }
  .hero-cta {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta .btn {
    width: 100%;
    min-height: 48px;
  }
  .hero-features-bar {
    gap: 16px;
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    text-align: left;
  }
  .hero-feature-item {
    font-size: 0.88rem;
  }
  
  /* 导航栏移动端 */
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(14, 15, 20, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 59, 48, 0.25);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.7);
    gap: 16px;
    z-index: 999;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links a {
    font-size: 1.05rem;
    padding: 8px 0;
    display: block;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .mobile-toggle {
    display: block;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-actions .btn {
    padding: 8px 14px;
    font-size: 0.88rem;
  }

  /* 核心优势与文章网格 */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .feature-card {
    padding: 24px;
  }
  .section-title {
    font-size: clamp(1.6rem, 5vw, 2rem);
  }
  .section-desc {
    font-size: 0.95rem;
  }

  /* 套餐卡片单列布局 */
  .pricing-row {
    flex-direction: column;
    gap: 24px;
  }
  .pricing-card {
    flex: 1 1 100%;
    min-width: 0;
    padding: 28px 20px;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: none;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .article-card {
    padding: 20px;
  }
  .article-header h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand p {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .hero-features-bar {
    grid-template-columns: 1fr;
  }
  .nav-actions .btn-outline {
    display: none;
  }
  .pricing-amount strong {
    font-size: 2.2rem;
  }
  .pbn-links-bar {
    gap: 8px 12px;
  }
}

/* ==========================================================================
   客户端下载弹窗 (Download Modal) - Mobile-First 适配
   ========================================================================== */
.download-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background: rgba(8, 9, 13, 0.85);
  backdrop-filter: blur(12px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

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

.download-modal-content {
  background: linear-gradient(145deg, #1f1215 0%, #130a0c 100%);
  border: 1px solid rgba(255, 59, 48, 0.4);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 30px rgba(255, 59, 48, 0.25);
  position: relative;
  padding: 32px 28px 28px;
  animation: modalScaleUp 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScaleUp {
  from {
    transform: scale(0.92) translateY(12px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close-btn:hover {
  background: rgba(255, 59, 48, 0.3);
  border-color: var(--primary-red);
  transform: rotate(90deg);
}

.modal-header {
  text-align: center;
  margin-bottom: 24px;
}

.modal-icon {
  font-size: 2.8rem;
  margin-bottom: 10px;
  filter: drop-shadow(0 0 16px rgba(255, 59, 48, 0.6));
}

.modal-header h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
  line-height: 1.3;
}

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

.modal-platforms {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-platform-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
  min-height: 64px;
}

.modal-platform-btn i:first-child {
  font-size: 2rem;
  width: 36px;
  text-align: center;
}

.modal-platform-btn.android i:first-child {
  color: #3ddc84;
}

.modal-platform-btn.ios i:first-child {
  color: #a2aaad;
}

.modal-platform-btn .platform-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.modal-platform-btn .platform-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
}

.modal-platform-btn .platform-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.modal-platform-btn .arrow-icon {
  color: var(--text-dim);
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.modal-platform-btn:hover {
  background: rgba(255, 59, 48, 0.15);
  border-color: var(--primary-red);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 59, 48, 0.2);
}

.modal-platform-btn:hover .arrow-icon {
  color: var(--primary-red);
  transform: translateX(4px);
}

.modal-footer-note {
  margin-top: 20px;
  text-align: center;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.modal-fallback-link {
  font-size: 0.88rem;
  color: var(--primary-red);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.modal-fallback-link:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

/* ==========================================================================
   下载中心页面专属样式 (Download Center Page)
   ========================================================================== */
.download-hero {
  padding: 80px 0 50px;
  text-align: center;
}

.download-platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 28px;
  max-width: 860px;
  margin: 40px auto 0;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.download-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-red);
  box-shadow: 0 12px 30px rgba(255, 59, 48, 0.25);
}

.download-card-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-red), #e53935);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 20px;
  box-shadow: 0 4px 12px var(--primary-glow);
  white-space: nowrap;
}

.download-card-icon {
  font-size: 3.6rem;
  margin-bottom: 16px;
}

#android-card .download-card-icon {
  color: #3ddc84;
}

#ios-card .download-card-icon {
  color: #a2aaad;
}

.download-card h3 {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.download-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.download-info-list {
  list-style: none;
  text-align: left;
  margin-bottom: 28px;
  flex: 1;
}

.download-info-list li {
  font-size: 0.88rem;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-info-list li i {
  color: var(--accent-green);
  font-size: 0.9rem;
}

.btn-block {
  width: 100%;
}

.download-steps-section {
  padding: 70px 0;
  background: rgba(15, 17, 26, 0.5);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-red);
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-red), #ff9500);
  color: #fff;
  font-weight: 800;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.download-faq-section {
  padding: 70px 0;
}