/* ===================================================================
   青云梯 (QingYunTi) 官网全局样式表 - 现代赛博科技/低延迟专线暗黑主题
   域名: qingyunti.monster
   =================================================================== */

:root {
  --bg-main: #020713;
  --bg-space: #051020;
  --bg-card: rgba(6, 17, 36, 0.82);
  --bg-card-hover: rgba(10, 28, 58, 0.92);
  --border-card: rgba(0, 242, 254, 0.2);
  --border-card-hover: rgba(0, 242, 254, 0.55);
  
  --primary: #00f2fe;
  --primary-rgb: 0, 242, 254;
  --primary-hover: #4facfe;
  --secondary: #7f5af0;
  --secondary-hover: #9d7df9;
  --accent: #10b981;
  --accent-amber: #f59e0b;
  --danger: #ef4444;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.3);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 20px 40px -15px rgba(0, 242, 254, 0.35);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", Consolas, Monaco, "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(ellipse 90% 60% at 50% -10%, rgba(0, 242, 254, 0.16) 0%, transparent 70%),
    radial-gradient(circle 800px at 85% 30%, rgba(16, 185, 129, 0.08) 0%, transparent 60%),
    radial-gradient(circle 700px at 15% 65%, rgba(6, 182, 212, 0.09) 0%, transparent 60%),
    radial-gradient(ellipse 80% 40% at 50% 100%, rgba(0, 242, 254, 0.07) 0%, transparent 70%),
    linear-gradient(180deg, #020713 0%, #051020 50%, #020610 100%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  background-color: transparent;
  position: relative;
}

/* 动态背景 Canvas (青色天梯与云海引擎) */
#ambientCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.95;
}

main, .footer {
  position: relative;
  z-index: 2;
}

/* 页面通用容器 */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 链接基础重置 */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

/* 基础按钮组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #040d1a;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.35);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.6);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-blog {
  background: linear-gradient(135deg, rgba(127, 90, 240, 0.15) 0%, rgba(0, 242, 254, 0.15) 100%);
  color: #c4b5fd;
  border: 1px solid rgba(127, 90, 240, 0.35);
}

.btn-blog:hover {
  background: linear-gradient(135deg, rgba(127, 90, 240, 0.25) 0%, rgba(0, 242, 254, 0.25) 100%);
  border-color: #a78bfa;
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

.btn-shine {
  position: relative;
  overflow: hidden;
}

.btn-shine::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: rotate(30deg);
  transition: all 0.75s ease;
}

.btn-shine:hover::after {
  left: 120%;
}

/* ===================================================================
   顶部导航栏 Navbar
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 14px 0;
  background: rgba(6, 9, 19, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 10px 0;
  background: rgba(6, 9, 19, 0.92);
  border-bottom-color: rgba(0, 242, 254, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* 左侧 Logo 视觉 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.brand-logo-img {
  height: 40px;
  width: 40px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.45);
  border: 1px solid rgba(0, 242, 254, 0.35);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.08);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.7);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 30%, #00f2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
  font-weight: 600;
}

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

.nav-link {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
}

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

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

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* 移动端侧边抽屉 */
.mobile-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  z-index: 1100;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-backdrop.active {
  display: block;
  opacity: 1;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 280px;
  height: 100%;
  background: #090e1c;
  border-left: 1px solid rgba(0, 242, 254, 0.2);
  z-index: 1200;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.7);
}

.mobile-drawer.active {
  right: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}

.drawer-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.drawer-links a {
  font-size: 1.05rem;
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.drawer-links a:hover {
  color: var(--primary);
  padding-left: 6px;
}

/* ===================================================================
   首屏横幅区 (Hero Section)
   =================================================================== */
.hero-section {
  padding-top: 150px;
  padding-bottom: 80px;
  position: relative;
}

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

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

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

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

.hero-badge-text {
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title-highlight {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 640px;
}

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

.hero-pills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 580px;
}

.hero-pill-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.hero-pill-item svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Hero 右侧拟态终端卡片 */
.hero-visual-card {
  background: rgba(13, 20, 36, 0.8);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 242, 254, 0.15);
  backdrop-filter: blur(16px);
  position: relative;
}

.terminal-header {
  background: rgba(6, 9, 19, 0.8);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.node-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  margin-bottom: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.node-item-row:hover {
  background: rgba(0, 242, 254, 0.06);
  border-color: rgba(0, 242, 254, 0.2);
}

.node-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  color: #ffffff;
}

.node-flag {
  font-size: 1.1rem;
}

.node-protocol {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: rgba(127, 90, 240, 0.2);
  color: #c4b5fd;
  border-radius: 4px;
}

.node-ping {
  color: var(--accent);
  font-weight: 600;
}

/* ===================================================================
   板块基础规范 Section Shared
   =================================================================== */
.section-wrap {
  padding: 90px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary);
  text-transform: uppercase;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===================================================================
   核心优势图卡区 (Dynamic Cards)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

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

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* 深度特性代码与流媒体支持卡片 */
.deep-feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 32px;
}

.deep-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 30px;
}

.code-terminal {
  background: #040711;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #38bdf8;
  line-height: 1.7;
  overflow-x: auto;
  margin-top: 14px;
}

.streaming-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.stream-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* ===================================================================
   定价卡片区 (Pricing Section) - 严格遵循【所有价格要同排】
   =================================================================== */
.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-card);
  border-radius: var(--radius-md);
  padding: 32px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 推荐套餐高亮卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 32, 60, 0.9) 0%, rgba(9, 14, 28, 0.9) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
}

.pricing-featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #040d1a;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.4);
}

.pricing-header {
  margin-bottom: 20px;
  text-align: center;
}

.pricing-plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-height: 40px;
}

.pricing-cost {
  margin: 18px 0;
  text-align: center;
  padding: 14px 0;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
  vertical-align: top;
  margin-right: 2px;
}

.price-num {
  font-size: 2.6rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

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

.price-billing-sub {
  font-size: 0.78rem;
  color: var(--accent);
  margin-top: 6px;
}

.pricing-features {
  list-style: none;
  margin: 20px 0 28px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.4;
}

.pricing-features li svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-features li strong {
  color: #ffffff;
}

/* ===================================================================
   节点与线路实时状态表
   =================================================================== */
.node-status-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow-x: auto;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.node-table th {
  padding: 12px 16px;
  color: var(--text-sub);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
  text-transform: uppercase;
}

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

.node-table tr:hover td {
  background: rgba(0, 242, 254, 0.03);
}

.badge-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-tag.green {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.badge-tag.blue {
  background: rgba(0, 242, 254, 0.15);
  color: #38bdf8;
}

/* ===================================================================
   资讯与文章专区 (Articles Section)
   =================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

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

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(0, 242, 254, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

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

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: #ffffff;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.article-card:hover .article-title {
  color: var(--primary);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-read-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

/* ===================================================================
   用户评价跑马灯区 (Testimonials Marquee)
   =================================================================== */
.marquee-container {
  overflow: hidden;
  position: relative;
  width: 100%;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.marquee-track {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: marqueeScroll 45s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-card {
  width: 360px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px;
  flex-shrink: 0;
  transition: all 0.25s ease;
}

.testimonial-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
}

.stars-row {
  display: flex;
  gap: 3px;
  color: var(--accent-amber);
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.testimonial-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe 0%, #7f5af0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
}

.author-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
}

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

/* ===================================================================
   常见问题 FAQ 手风琴
   =================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item[open] {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ===================================================================
   底部二次行动呼吁 (CTA Banner)
   =================================================================== */
.cta-banner {
  background: radial-gradient(circle at 50% 50%, rgba(0, 242, 254, 0.15) 0%, rgba(13, 20, 36, 0.9) 70%);
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  margin: 40px auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

.cta-banner h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-banner p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto 32px;
}

/* ===================================================================
   页脚规范 Footer
   =================================================================== */
.footer {
  background: #04060c;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 70px 0 30px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-sub);
  font-size: 0.88rem;
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-brand-p {
  color: var(--text-sub);
  font-size: 0.86rem;
  line-height: 1.65;
  margin-top: 14px;
  max-width: 320px;
}

.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: 0.82rem;
  color: var(--text-sub);
}

/* ===================================================================
   文章内页专用排版样式 (Article Single Page Layout)
   =================================================================== */
.article-detail-wrap {
  max-width: 900px;
  margin: 120px auto 60px;
  padding: 0 20px;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-sub);
  margin-bottom: 24px;
}

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

.article-header-box {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 18px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin: 40px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 242, 254, 0.2);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #f1f5f9;
  margin: 28px 0 14px;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content strong {
  color: #ffffff;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-content a:hover {
  color: #ffffff;
}

.article-callout {
  background: rgba(0, 242, 254, 0.06);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 30px 0;
  color: #e2e8f0;
}

.article-related-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-top: 50px;
}

.article-related-box h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: #ffffff;
}

.article-related-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.article-related-list a {
  font-size: 0.92rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-related-list a:hover {
  text-decoration: underline;
}

/* ===================================================================
   响应式断点适配规范 (Mobile Adaptation)
   =================================================================== */
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

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

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

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

@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 2.6rem;
  }

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

  .hero-cta-group {
    justify-content: center;
  }

  .hero-pills {
    margin: 0 auto;
  }

  .hero-visual-card {
    max-width: 520px;
    margin: 0 auto;
  }

  .nav-links, .nav-actions .btn-primary {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .deep-feature-grid {
    grid-template-columns: 1fr;
  }

  .article-related-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.1rem;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-pills {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .cta-banner h2 {
    font-size: 1.8rem;
  }

  .article-h1 {
    font-size: 1.8rem;
  }
}