/* 库洛米 (Kuromi) - 海盐日晒与薄荷暖青 极致增强版 */
:root {
  /* 颜色变量 */
  --bg-sea-salt: #FAF8F5;          /* 海盐基底背景 */
  --bg-card: #FFFFFF;              /* 卡片纯白 */
  --bg-sun-baked: #F3EFE6;         /* 日晒暖饰色 */
  --bg-sun-light: #FFFDF9;         /* 暖阳浅亮 */
  
  --mint-primary: #10B981;         /* 薄荷主调 */
  --mint-hover: #059669;           /* 薄荷深悬停 */
  --mint-light: #E6F7F3;           /* 薄荷浅衬色 */
  --mint-glow: rgba(16, 185, 129, 0.25);
  
  --sun-accent: #D97706;           /* 日晒金琥珀 */
  --sun-soft: #FDE68A;             /* 柔琥珀衬色 */
  
  --text-main: #1F2937;            /* 深灰黑主文字 */
  --text-muted: #4B5563;           /* 次级灰文字 */
  --text-light: #6B7280;           /* 弱文本 */
  
  --border-color: #E5E7EB;
  --border-sun: #E6DFD1;
  
  --shadow-sm: 0 4px 12px rgba(31, 41, 55, 0.03);
  --shadow-md: 0 10px 30px rgba(16, 185, 129, 0.1);
  --shadow-lg: 0 20px 45px rgba(0, 0, 0, 0.08);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  overflow-x: hidden;
  position: relative;
  background: radial-gradient(circle at 10% 10%, #F5EFE4 0%, transparent 40%),
              radial-gradient(circle at 90% 60%, #E6F4F1 0%, transparent 40%),
              var(--bg-sea-salt);
  min-height: 100vh;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 90px 0;
  position: relative;
}

/* 标题通用样式 */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  background-color: var(--mint-light);
  color: var(--mint-hover);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  border: 1px solid rgba(16, 185, 129, 0.25);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.08);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-title span {
  color: var(--mint-primary);
  background: linear-gradient(135deg, var(--mint-primary), var(--sun-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto;
}

/* 按钮基础 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  font-size: 1.02rem;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  box-shadow: 0 8px 24px var(--mint-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px var(--mint-glow);
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.btn-secondary {
  background-color: var(--bg-sun-baked);
  color: var(--text-main);
  border: 1px solid var(--border-sun);
}

.btn-secondary:hover {
  background-color: #E6DFD1;
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  color: #FFFFFF;
  box-shadow: 0 8px 22px rgba(217, 119, 6, 0.25);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(217, 119, 6, 0.35);
}

/* ================= 导航栏 Header ================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(230, 223, 209, 0.6);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

/* 互动 Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--mint-primary), var(--sun-accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  font-weight: 900;
  font-size: 1.3rem;
  box-shadow: 0 4px 14px var(--mint-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: rotate(45deg);
  animation: shine 4s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) rotate(45deg); }
  20%, 100% { transform: translateX(100%) rotate(45deg); }
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

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

/* 导航目录 Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.98rem;
  font-weight: 600;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--mint-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--mint-primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

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

/* ================= 1. Hero 左右双栏布局 ================= */
.hero {
  padding-top: 150px;
  padding-bottom: 90px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-sun);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sun-accent);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--mint-primary) 0%, var(--sun-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-sun);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.metric-item {
  text-align: center;
  border-right: 1px solid var(--border-color);
}

.metric-item:last-child {
  border-right: none;
}

.metric-number {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--mint-primary);
}

.metric-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 2px;
}

/* 右侧动态图卡 (Dynamic Card Element) */
.hero-right {
  position: relative;
}

.dynamic-card-container {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.card-main {
  background: linear-gradient(145deg, #FFFFFF 0%, #F5F9F7 100%);
  border: 1.5px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 20px 40px rgba(16, 185, 129, 0.12), 0 8px 16px rgba(0, 0, 0, 0.04);
  position: relative;
  z-index: 2;
}

.card-header-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--mint-light);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--mint-hover);
}

.status-dot-green {
  width: 8px;
  height: 8px;
  background: var(--mint-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--mint-primary);
}

.speed-meter {
  background: #111827;
  color: #FFF;
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
}

.speed-value {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--mint-primary);
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: monospace;
}

.speed-value span {
  font-size: 1rem;
  color: #9CA3AF;
  font-family: sans-serif;
}

.speed-bar-container {
  height: 8px;
  background: #374151;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 12px;
}

.speed-bar-fill {
  height: 100%;
  width: 94%;
  background: linear-gradient(90deg, #10B981, #F59E0B);
  border-radius: 4px;
  animation: speedPulse 3s ease-in-out infinite alternate;
}

@keyframes speedPulse {
  0% { width: 88%; }
  100% { width: 98%; }
}

.node-list-mini {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-item-mini {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #F9FAFB;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.88rem;
  border: 1px solid var(--border-color);
}

.ping-tag {
  color: var(--mint-primary);
  font-weight: 800;
  font-size: 0.85rem;
  font-family: monospace;
}

/* 浮动装饰小卡片 */
.floating-badge-1 {
  position: absolute;
  top: -20px;
  right: -20px;
  background: #FFFFFF;
  border: 1px solid var(--border-sun);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: var(--shadow-md);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.88rem;
  animation: floatCard 4s ease-in-out infinite;
}

.floating-badge-2 {
  position: absolute;
  bottom: -24px;
  left: -20px;
  background: #FFFFFF;
  border: 1px solid var(--border-sun);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: var(--shadow-md);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.88rem;
  animation: floatCard 4s ease-in-out 2s infinite;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ================= 2. 核心优势增强卡片 ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  border: 1px solid var(--border-sun);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--mint-primary);
}

.feature-icon-wrapper {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  background: var(--mint-light);
  color: var(--mint-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.85rem;
  margin-bottom: 24px;
  transition: transform var(--transition-fast);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.12);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--mint-primary), var(--sun-accent));
  color: #FFF;
}

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

.feature-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= 3. 流媒体 & AI 图标精修支持 ================= */
.support-section {
  background: linear-gradient(180deg, transparent 0%, rgba(230, 244, 241, 0.6) 50%, transparent 100%);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border-sun);
  border-radius: var(--radius-lg);
  padding: 38px;
  box-shadow: var(--shadow-sm);
}

.support-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.support-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.support-card-icon.streaming {
  background: #FEE2E2;
  color: #E53E3E;
}

.support-card-icon.ai {
  background: #E0E7FF;
  color: #4F46E5;
}

.support-card-title {
  font-size: 1.45rem;
  font-weight: 800;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  background-color: var(--bg-sea-salt);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.tag-item:hover {
  border-color: var(--mint-primary);
  background-color: #FFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* 品牌色彩微徽章 */
.badge-netflix { border-left: 3px solid #E50914; }
.badge-disney { border-left: 3px solid #113CCF; }
.badge-youtube { border-left: 3px solid #FF0000; }
.badge-chatgpt { border-left: 3px solid #10A37F; }
.badge-claude { border-left: 3px solid #D97757; }
.badge-midjourney { border-left: 3px solid #2B6CB0; }

/* ================= 4. 参考网上真实套餐价格表 ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

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

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.pricing-card.popular {
  border: 2px solid var(--mint-primary);
  box-shadow: 0 12px 32px var(--mint-glow);
  transform: scale(1.02);
}

.pricing-card.popular:hover {
  transform: scale(1.04) translateY(-4px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--mint-primary), var(--mint-hover));
  color: #FFF;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--mint-glow);
  white-space: nowrap;
}

.pricing-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.pricing-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

.pricing-price {
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.price-currency {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.price-val {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.price-unit {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-left: 2px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.pricing-features li svg {
  width: 16px;
  height: 16px;
  color: var(--mint-primary);
  flex-shrink: 0;
}

/* ================= 5. 用户评价 ================= */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.stars {
  color: #F59E0B;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

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

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--mint-light), var(--bg-sun-baked));
  color: var(--mint-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  border: 1px solid var(--border-sun);
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-role {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ================= 6. 常见问题 (FAQ) ================= */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

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

.faq-question {
  width: 100%;
  padding: 22px 28px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--mint-light);
  color: var(--mint-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: var(--mint-primary);
  color: #FFF;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  background-color: var(--bg-sun-light);
  padding: 0 28px;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 28px 22px 28px;
}

.faq-answer p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* ================= 侧边章节上下滑动箭头 ================= */
.side-nav-arrows {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arrow-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-sun);
  color: var(--text-main);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
  outline: none;
}

.arrow-btn:hover {
  background: var(--mint-primary);
  color: #FFFFFF;
  border-color: var(--mint-primary);
  transform: scale(1.12);
  box-shadow: 0 6px 20px var(--mint-glow);
}

.arrow-btn:active {
  transform: scale(0.92);
}

.arrow-btn.disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ================= 页脚 Footer ================= */
.footer {
  background: #182232;
  color: #E2E8F0;
  padding: 60px 0 30px;
  border-top: 3px solid var(--mint-primary);
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 50px;
  text-align: center;
}

.footer-col-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-col-link {
  display: inline-block;
  padding: 8px 20px;
  color: var(--mint-primary);
  text-decoration: none;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.footer-col-link:hover {
  background: var(--mint-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--mint-glow);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: #94A3B8;
}

/* 响应式适配 Responsive */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-left { text-align: center; }
  .hero-actions { justify-content: center; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-menu { display: none; } /* 移动端隐藏中间菜单，保持极简 */
}

@media (max-width: 768px) {
  .features-grid, .testimonials-grid { grid-template-columns: repeat(1, 1fr); }
  .support-grid { grid-template-columns: repeat(1, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-nav-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .pricing-card.popular { transform: none; }
  .pricing-card.popular:hover { transform: translateY(-4px); }
  .hero-title { font-size: 2.2rem; }
}

@media (max-width: 640px) {
  section { padding: 50px 0; }
  .hero { padding-top: 110px; }
  .hero-subtitle { font-size: 1.02rem; }
  .hero-metrics { grid-template-columns: 1fr; gap: 14px; }
  .metric-item { border-right: none; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
  .metric-item:last-child { border-bottom: none; }
  .footer-nav-grid { grid-template-columns: 1fr; }
  .side-nav-arrows { right: 12px; }
  .arrow-btn { width: 40px; height: 40px; }
}

/* ================= 5. SEO 文章图卡区 (放置于价格板块下方) ================= */
.seo-articles-section {
  background: linear-gradient(180deg, rgba(230, 244, 241, 0.4) 0%, transparent 100%);
  padding: 80px 0;
}

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

.seo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-sun);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

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

.seo-card-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 12px;
  background: var(--mint-light);
  color: var(--mint-hover);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.seo-card-title {
  font-size: 1.18rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 12px;
}

.seo-card-title a {
  color: var(--text-main);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.seo-card-title a:hover {
  color: var(--mint-primary);
}

.seo-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.seo-card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.seo-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: #FFFFFF;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.seo-card-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

@media (max-width: 992px) {
  .seo-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .seo-grid { grid-template-columns: 1fr; }
}