/* ==========================================================================
   ByWave.best - 极速原生样式表 (Vanilla CSS, 零框架, 秒开性能保障)
   ========================================================================== */

:root {
  --bg-primary: #06090F;
  --bg-secondary: #0B111E;
  --bg-card: rgba(14, 23, 39, 0.75);
  --bg-card-hover: rgba(18, 30, 52, 0.9);
  --bg-elevated: #111A2E;
  
  --border-color: rgba(56, 189, 248, 0.14);
  --border-focus: rgba(0, 245, 255, 0.45);
  --border-highlight: #00F5FF;
  
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-subtle: #64748B;
  
  --accent-cyan: #00F5FF;
  --accent-icegreen: #10f0ba;
  --accent-blue: #0077FE;
  --accent-purple: #8B5CF6;
  --accent-emerald: #10B981;
  --accent-gold: #F59E0B;
  
  --grad-icegreen: linear-gradient(135deg, #00ffc4 0%, #10f0ba 50%, #05c48b 100%);
  --glow-cyan: 0 0 25px rgba(0, 245, 255, 0.25);
  --glow-icegreen: 0 0 25px rgba(16, 240, 186, 0.4);
  --glow-blue: 0 0 30px rgba(0, 119, 254, 0.35);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --container-max: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #0E1B33 0%, #06090F 70%);
}

/* 动态背景画布 */
#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

.site-wrapper {
  position: relative;
  z-index: 1;
}

/* 页面通用容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 链接默认 */
a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #38BDF8;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #00ffc4 0%, #10f0ba 50%, #05c48b 100%);
  color: #021812;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(16, 240, 186, 0.38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(16, 240, 186, 0.65);
  color: #000000;
}

.btn-outline {
  background: rgba(14, 23, 39, 0.6);
  color: var(--text-main);
  border-color: rgba(56, 189, 248, 0.35);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(0, 245, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13.5px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
  letter-spacing: 0.5px;
}

/* 顶部导航栏 (Logo位于左上方) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(6, 9, 15, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(6, 9, 15, 0.95);
  border-bottom: 1px solid rgba(0, 245, 255, 0.18);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

/* 左上方Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.site-logo img,
.site-logo svg {
  height: 48px;
  width: auto;
  display: block;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 移动端汉堡按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}

/* 英雄区 (Hero Section) */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0, 245, 255, 0.08);
  border: 1px solid rgba(0, 245, 255, 0.28);
  color: var(--accent-cyan);
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 24px;
  animation: pulseGlow 3s infinite;
}

@keyframes pulseGlow {
  0%, 100% { border-color: rgba(0, 245, 255, 0.3); box-shadow: 0 0 10px rgba(0, 245, 255, 0.1); }
  50% { border-color: rgba(0, 245, 255, 0.7); box-shadow: 0 0 20px rgba(0, 245, 255, 0.3); }
}

.hero-title {
  font-size: clamp(34px, 5.5vw, 56px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.8px;
  margin-bottom: 20px;
  color: #FFFFFF;
}

.text-gradient {
  background: linear-gradient(135deg, #00ffc4 0%, #10f0ba 50%, #05c48b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-meta-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 13.5px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.meta-icon {
  color: var(--accent-cyan);
  font-size: 16px;
}

/* 状态指示器与亮点横幅 */
.status-ticker {
  margin: 30px auto 0;
  max-width: 900px;
  background: rgba(14, 23, 39, 0.55);
  border: 1px solid rgba(56, 189, 248, 0.16);
  border-radius: var(--radius-md);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13.5px;
}

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

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

@keyframes blink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* 核心优势卡片网格 (Features) */
.section {
  padding: 70px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  background: rgba(0, 245, 255, 0.08);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
}

.section-title {
  font-size: clamp(26px, 3.8vw, 38px);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--accent-cyan);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.feature-text {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   价格方案 (Pricing Section) - 核心要求: 所有价格同排 (All cards in 1 row)
   ========================================================================== */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.pricing-notice-banner {
  background: linear-gradient(90deg, rgba(0, 245, 255, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(0, 245, 255, 0.3);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  text-align: center;
  margin: 0 auto 36px;
  max-width: 880px;
  font-size: 14.5px;
  color: #E2E8F0;
}

.pricing-notice-banner strong {
  color: var(--accent-cyan);
}

/* 关键：桌面端4个套餐卡片绝对同排展示 (grid 4 columns) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 245, 255, 0.4);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* 爆款力荐卡片高亮 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 30, 58, 0.88) 0%, rgba(10, 18, 36, 0.95) 100%);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 35px rgba(0, 245, 255, 0.22);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 0 45px rgba(0, 245, 255, 0.35);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00ffc4 0%, #10f0ba 50%, #05c48b 100%);
  color: #021812;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(16, 240, 186, 0.45);
  white-space: nowrap;
}

.plan-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(0, 245, 255, 0.08);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.plan-name {
  font-size: 21px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 13px;
  color: var(--text-muted);
  min-height: 38px;
  line-height: 1.5;
  margin-bottom: 18px;
}

.plan-price-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  text-align: center;
  margin-bottom: 22px;
}

.price-currency {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-cyan);
  vertical-align: top;
  margin-right: 2px;
}

.price-amount {
  font-size: 38px;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
  font-family: var(--font-sans);
}

.price-period {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: 4px;
}

.price-tagline {
  font-size: 12px;
  color: #38BDF8;
  margin-top: 6px;
  font-weight: 600;
}

.plan-features {
  list-style: none;
  margin-bottom: 26px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.plan-features li {
  font-size: 13px;
  color: #CBD5E1;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.feature-check {
  color: var(--accent-cyan);
  font-weight: 800;
  font-size: 14px;
  line-height: 1.2;
}

.plan-cta {
  width: 100%;
  margin-top: auto;
  font-size: 14.5px;
  padding: 12px 18px;
}

/* 客户端兼容性与流媒体支持 (Platforms & Streaming) */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.streaming-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 12px;
  text-align: center;
  transition: all var(--transition-fast);
}

.streaming-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

.streaming-card .stream-icon {
  font-size: 26px;
  margin-bottom: 6px;
}

.streaming-card .stream-name {
  font-size: 13px;
  font-weight: 600;
  color: #E2E8F0;
}

.streaming-card .stream-status {
  font-size: 11px;
  color: var(--accent-emerald);
  margin-top: 2px;
}

/* 节点线路与测速面板 (Node Speedtest & Architecture) */
.speed-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-top: 40px;
}

.node-table-wrapper {
  overflow-x: auto;
  margin-top: 20px;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.node-table th {
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.3);
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.node-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: #E2E8F0;
}

.node-table tr:hover td {
  background: rgba(0, 245, 255, 0.04);
}

.badge-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-iplc {
  background: rgba(0, 245, 255, 0.15);
  color: #00F5FF;
}

.badge-isp {
  background: rgba(139, 92, 246, 0.18);
  color: #C084FC;
}

.badge-speed {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
}

/* 文章专栏与知识库模块 (SEO Internal Linking Articles Section) */
.articles-section {
  padding: 80px 0;
  position: relative;
}

.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-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 245, 255, 0.4);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

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

.article-cat {
  color: var(--accent-cyan);
  font-weight: 700;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a {
  color: #FFFFFF;
}

.article-card-title a:hover {
  color: var(--accent-cyan);
}

.article-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.keyword-pill {
  font-size: 11px;
  background: rgba(255, 255, 255, 0.05);
  color: #94A3B8;
  padding: 2px 8px;
  border-radius: 4px;
}

.article-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.article-link-arrow:hover {
  gap: 10px;
}

/* ==========================================================================
   最下方：用户评价 (Customer Testimonials & Reviews)
   ========================================================================== */
.reviews-section {
  padding: 80px 0 60px;
  position: relative;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 245, 255, 0.35);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
}

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

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

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0077FE, #00F5FF);
  color: #030712;
  font-weight: 900;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-details h4 {
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
}

.user-details span {
  font-size: 12px;
  color: var(--text-muted);
}

.review-stars {
  color: #FBBF24;
  font-size: 14px;
  letter-spacing: 2px;
}

.review-body {
  font-size: 14px;
  color: #CBD5E1;
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.review-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 12px;
  font-size: 12px;
  color: var(--text-subtle);
}

.verified-tag {
  color: var(--accent-emerald);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
}

/* ==========================================================================
   最下方：常见问题 (FAQ Accordion)
   ========================================================================== */
.faq-section {
  padding: 60px 0 90px;
  position: relative;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(0, 245, 255, 0.3);
}

.faq-item.active {
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
}

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

.faq-title {
  font-size: 16.5px;
  font-weight: 700;
  color: #FFFFFF;
}

.faq-toggle-icon {
  font-size: 20px;
  font-weight: 400;
  color: var(--accent-cyan);
  transition: transform var(--transition-fast);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 22px;
}

/* 底部CTA与权威外链 (Footer & Outbound Links) */
.footer-cta {
  background: linear-gradient(180deg, rgba(14, 27, 49, 0.6) 0%, rgba(6, 9, 15, 0.95) 100%);
  border-top: 1px solid rgba(0, 245, 255, 0.2);
  padding: 70px 0 40px;
  text-align: center;
}

.site-footer {
  background: #04060A;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 30px;
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand p {
  margin-top: 14px;
  line-height: 1.7;
  max-width: 380px;
  color: var(--text-muted);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 18px;
}

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

.footer-links a {
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: var(--text-subtle);
}

/* 响应式断点 (Responsive Rules) */
@media (max-width: 1180px) {
  /* 当处于笔记本或偏窄屏幕时，保持同排紧凑排布或自适应调整 */
  .pricing-grid {
    gap: 14px;
  }
  .pricing-card {
    padding: 24px 16px;
  }
  .price-amount {
    font-size: 32px;
  }
}

@media (max-width: 992px) {
  .features-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    /* 平板端保持双列或紧凑排布 */
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .streaming-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(6, 9, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 26px 20px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    display: none;
  }
  
  .nav-menu.open {
    display: flex;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .streaming-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}