/* ==========================================================================
   you-tu 优途机场官网 (you-tu.cyou) - 原生现代极速 CSS 样式表
   零外部依赖 | 纯原生轻量 | 动态流光背景 | 秒开优化
   ========================================================================== */

/* ---------------- 全局变量与设计规范 ---------------- */
:root {
  --bg-main: #060813;
  --bg-card: rgba(14, 20, 36, 0.75);
  --bg-card-hover: rgba(22, 30, 54, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(255, 85, 0, 0.35);
  
  --brand-primary: #FF5500;
  --brand-secondary: #FF0055;
  --brand-cyan: #00E5FF;
  --brand-purple: #7928CA;
  --brand-gradient: linear-gradient(135deg, #FF0055 0%, #FF5500 50%, #FF9900 100%);
  --brand-gradient-hover: linear-gradient(135deg, #FF1A6B 0%, #FF661A 50%, #FFAA1A 100%);
  --brand-glow-cyan: linear-gradient(135deg, #00E5FF 0%, #0070F3 100%);
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --text-highlight: #38BDF8;

  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

/* 确保所有前景内容层位于动态背景上方 (z-index: 2) */
.hero, .section, .footer, main {
  position: relative;
  z-index: 2;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

button, input {
  font: inherit;
}

/* ---------------- 动态流光背景系统 ---------------- */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1; /* 提升至 z-index: 1，位于 body 之上，彻底解决被纯黑遮挡问题 */
  pointer-events: none;
  overflow: hidden;
  background-color: var(--bg-main);
}

/* ---------------- 悠兔动态星空背景系统 (Cute & Dreamy Bunny Galaxy) ---------------- */
.rabbit-space-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.floating-rabbit {
  position: absolute;
  pointer-events: none;
  will-change: transform, opacity;
  opacity: 0.85;
  transition: opacity 0.5s ease;
}

/* 萌兔 1：梦幻气球飞天萌团子 (左上方，优雅轻盈漂浮) */
.bunny-balloons {
  top: 10%;
  left: 3.5%;
  width: 110px;
  height: 135px;
  animation: floatBunnyBalloons 10s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 16px rgba(255, 182, 193, 0.75)) drop-shadow(0 0 25px rgba(0, 229, 255, 0.4));
}

@keyframes floatBunnyBalloons {
  0% { transform: translate3d(0, 0, 0) rotate(-4deg); opacity: 0.8; }
  50% { transform: translate3d(25px, 35px, 0) rotate(5deg) scale(1.05); opacity: 0.95; }
  100% { transform: translate3d(-15px, 60px, 0) rotate(-3deg) scale(0.98); opacity: 0.82; }
}

/* 萌兔 2：抱月甜梦熟睡兔 (右上方，轻柔呼吸起伏) */
.bunny-sleeping-moon {
  top: 14%;
  right: 4%;
  width: 125px;
  height: 125px;
  animation: floatSleepingMoon 12s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 20px rgba(255, 220, 100, 0.8)) drop-shadow(0 0 28px rgba(255, 140, 180, 0.4));
}

@keyframes floatSleepingMoon {
  0% { transform: translate3d(0, 0, 0) rotate(3deg) scale(0.98); opacity: 0.82; }
  50% { transform: translate3d(-30px, -25px, 0) rotate(-5deg) scale(1.06); opacity: 0.98; }
  100% { transform: translate3d(-55px, 15px, 0) rotate(4deg) scale(1); opacity: 0.85; }
}

/* 萌兔 3：软萌云朵樱花趴趴兔 (左侧中部，宛如水母云间游动) */
.bunny-cloud-sakura {
  top: 45%;
  left: 2.5%;
  width: 130px;
  height: 105px;
  animation: floatCloudSakura 9s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 18px rgba(255, 150, 200, 0.75)) drop-shadow(0 0 26px rgba(160, 220, 255, 0.45));
}

@keyframes floatCloudSakura {
  0% { transform: translate3d(0, 0, 0) rotate(-4deg); opacity: 0.8; }
  50% { transform: translate3d(45px, -20px, 0) rotate(4deg) scale(1.08); opacity: 0.98; }
  100% { transform: translate3d(85px, 25px, 0) rotate(-3deg) scale(1.02); opacity: 0.85; }
}

/* 萌兔 4：捧着发光粉爱心的乖巧萌兔 (右侧中部，轻微娇羞微晃) */
.bunny-heart-love {
  top: 48%;
  right: 3.5%;
  width: 105px;
  height: 120px;
  animation: floatHeartLove 8s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 20px rgba(255, 105, 180, 0.85)) drop-shadow(0 0 28px rgba(255, 192, 203, 0.5));
}

@keyframes floatHeartLove {
  0% { transform: translate3d(0, 0, 0) scale(1) rotate(2deg); opacity: 0.82; }
  50% { transform: translate3d(-25px, 28px, 0) scale(1.08) rotate(-4deg); opacity: 0.98; }
  100% { transform: translate3d(-10px, 55px, 0) scale(1.02) rotate(3deg); opacity: 0.85; }
}

/* 萌兔 5：挥舞仙女星愿棒的精灵羽翼兔 (左下方，梦幻星光洒落) */
.bunny-magic-fairy {
  bottom: 8%;
  left: 3%;
  width: 120px;
  height: 120px;
  animation: floatMagicFairy 11s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 20px rgba(180, 140, 255, 0.8)) drop-shadow(0 0 26px rgba(0, 229, 255, 0.5));
}

@keyframes floatMagicFairy {
  0% { transform: translate3d(0, 0, 0) rotate(-5deg); opacity: 0.8; }
  50% { transform: translate3d(35px, -35px, 0) rotate(6deg) scale(1.08); opacity: 0.98; }
  100% { transform: translate3d(-15px, -60px, 0) rotate(-2deg) scale(1); opacity: 0.85; }
}

/* 萌兔 6：骑软萌胖胡萝卜的围巾飞行兔 (右下方，萌趣巡航) */
.bunny-chubby-carrot {
  bottom: 8%;
  right: 3.5%;
  width: 135px;
  height: 100px;
  animation: floatChubbyCarrot 13s ease-in-out infinite alternate;
  filter: drop-shadow(0 0 22px rgba(255, 120, 50, 0.85)) drop-shadow(0 0 28px rgba(255, 200, 80, 0.5));
}

@keyframes floatChubbyCarrot {
  0% { transform: translate3d(0, 0, 0) rotate(5deg) scale(0.98); opacity: 0.8; }
  50% { transform: translate3d(-45px, -30px, 0) rotate(-4deg) scale(1.08); opacity: 0.98; }
  100% { transform: translate3d(-80px, 15px, 0) rotate(4deg) scale(1.02); opacity: 0.85; }
}

/* 移动端智能适配 */
@media (max-width: 768px) {
  .floating-rabbit {
    opacity: 0.7;
  }
  .bunny-balloons { width: 75px; height: 95px; left: 2%; top: 8%; }
  .bunny-sleeping-moon { width: 85px; height: 85px; right: 2%; top: 12%; }
  .bunny-cloud-sakura { display: none; }
  .bunny-heart-love { width: 75px; height: 85px; right: 2%; top: 48%; }
  .bunny-magic-fairy { width: 80px; height: 80px; left: 2%; bottom: 6%; }
  .bunny-chubby-carrot { width: 90px; height: 70px; right: 2%; bottom: 8%; }
}

/* 细腻暗黑网格纹理 */
.bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 85%);
}

/* 极光流光球 */
.bg-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  will-change: transform;
}

.orb-1 {
  top: -15%;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 0, 85, 0.6) 0%, rgba(255, 85, 0, 0.2) 60%, transparent 80%);
  animation: floatOrb1 18s ease-in-out infinite alternate;
}

.orb-2 {
  top: 25%;
  right: -10%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.45) 0%, rgba(121, 40, 202, 0.2) 60%, transparent 80%);
  animation: floatOrb2 22s ease-in-out infinite alternate;
}

.orb-3 {
  bottom: 5%;
  left: 5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(255, 153, 0, 0.35) 0%, rgba(255, 0, 85, 0.15) 60%, transparent 80%);
  animation: floatOrb3 20s ease-in-out infinite alternate;
}

@keyframes floatOrb1 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(80px, 60px, 0) scale(1.12); }
  100% { transform: translate3d(-60px, 100px, 0) scale(0.95); }
}

@keyframes floatOrb2 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-100px, 80px, 0) scale(1.08); }
  100% { transform: translate3d(40px, -50px, 0) scale(0.92); }
}

@keyframes floatOrb3 {
  0% { transform: translate3d(0, 0, 0) scale(0.95); }
  50% { transform: translate3d(60px, -70px, 0) scale(1.1); }
  100% { transform: translate3d(-40px, 30px, 0) scale(1); }
}

/* ---------------- 页面容器与全局排版 ---------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--brand-primary);
  background: rgba(255, 85, 0, 0.12);
  border: 1px solid rgba(255, 85, 0, 0.3);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-tag.cyan {
  color: var(--brand-cyan);
  background: rgba(0, 229, 255, 0.1);
  border-color: rgba(0, 229, 255, 0.3);
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.highlight-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.highlight-cyan {
  color: var(--brand-cyan);
}

/* ---------------- 顶部导航栏 (Navbar) ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 8, 19, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo img {
  height: 42px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.45));
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand-logo:hover img {
  transform: scale(1.03);
  filter: drop-shadow(0 0 14px rgba(0, 229, 255, 0.65));
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link:hover::after, .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 移动端菜单切换按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ---------------- 核心按钮 (CTA Button) ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(255, 85, 0, 0.35);
}

.btn-primary:hover {
  background: var(--brand-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 85, 0, 0.5);
  color: #FFFFFF;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-glow-pulse {
  position: relative;
  overflow: hidden;
}

.btn-glow-pulse::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: rotate(30deg) translate3d(-100%, 0, 0);
  animation: shineWave 4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes shineWave {
  0% { transform: rotate(30deg) translate3d(-100%, 0, 0); }
  35% { transform: rotate(30deg) translate3d(100%, 0, 0); }
  100% { transform: rotate(30deg) translate3d(100%, 0, 0); }
}

/* ---------------- Hero 首屏区域 ---------------- */
.hero {
  padding: 100px 0 80px 0;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(14, 20, 36, 0.8);
  border: 1px solid rgba(255, 85, 0, 0.3);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: clamp(1.9rem, 2.9vw, 2.95rem);
  font-weight: 900;
  line-height: 1.26;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title-sub {
  display: inline-block;
  white-space: nowrap;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-guarantee-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.guarantee-icon {
  color: var(--brand-cyan);
}

/* 核心特性数据跑马标 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 60px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  backdrop-filter: blur(12px);
  text-align: left;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 85, 0, 0.4);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---------------- 价格套餐区域 (Pricing Table - 同排对齐) ---------------- */
.pricing-section {
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(14, 20, 36, 0.5) 50%, transparent 100%);
}

.pricing-notice {
  text-align: center;
  margin-bottom: 30px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-notice span {
  color: var(--brand-cyan);
  font-weight: 600;
}

/* 用户要求：“所有价格要同排” - 桌面 4 列等宽对齐 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  transition: all var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 85, 0, 0.5);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 25px rgba(255, 85, 0, 0.15);
}

/* 热门推荐卡片高光 */
.pricing-card.featured {
  border-color: rgba(255, 85, 0, 0.6);
  background: rgba(20, 26, 48, 0.85);
  box-shadow: 0 12px 32px rgba(255, 85, 0, 0.2), 0 0 30px rgba(255, 85, 0, 0.1);
  transform: scale(1.02);
  z-index: 2;
}

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

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-gradient);
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(255, 85, 0, 0.4);
  white-space: nowrap;
}

.pricing-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

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

/* 核心价格行：价格数值同排展示 */
.price-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 16px 0 8px 0;
}

.currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--brand-primary);
}

.amount {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-main);
  line-height: 1;
}

.pricing-card.featured .amount {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.price-sub-calc {
  font-size: 0.8rem;
  color: var(--text-highlight);
  background: rgba(56, 189, 248, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 10px;
}

.plan-traffic-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  width: 100%;
}

.plan-traffic-badge .traffic-highlight {
  color: var(--brand-primary);
  font-size: 1.1rem;
}

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

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.45;
}

.check-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--success);
  margin-top: 2px;
}

.pricing-cta {
  margin-top: auto;
}

.pricing-cta .btn {
  width: 100%;
}

/* ---------------- 节点全球加速网络覆盖 ---------------- */
.nodes-section {
  position: relative;
}

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

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-smooth);
}

.node-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.4);
}

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

.node-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.node-flag {
  font-size: 1.4rem;
}

.node-ping {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.node-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.node-spec-tag {
  font-size: 0.76rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.node-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ---------------- 为什么选择 you-tu 核心优势 ---------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-smooth);
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 85, 0, 0.4);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(255, 85, 0, 0.12);
  border: 1px solid rgba(255, 85, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--brand-primary);
}

.feature-box.cyan .feature-icon-wrapper {
  background: rgba(0, 229, 255, 0.12);
  border-color: rgba(0, 229, 255, 0.3);
  color: var(--brand-cyan);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

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

/* ---------------- 全平台客户端支持 ---------------- */
.clients-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.client-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  transition: all var(--transition-fast);
}

.client-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.client-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.client-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.client-soft {
  font-size: 0.8rem;
  color: var(--brand-cyan);
}

/* ---------------- 精选推荐文章模块 ---------------- */
.articles-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 85, 0, 0.4);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.article-card-header {
  padding: 24px 24px 12px 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.article-tag {
  background: rgba(255, 85, 0, 0.12);
  color: var(--brand-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 10px;
}

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

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding: 0 24px 20px 24px;
  flex-grow: 1;
}

.article-card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  color: #FFFFFF;
}

/* ---------------- 用户真实评价 (Testimonials) ---------------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 85, 0, 0.35);
}

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

.review-content {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: normal;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #FFFFFF;
  font-size: 1rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---------------- 常见问题 FAQ (手风琴) ---------------- */
.faq-wrapper {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(255, 85, 0, 0.4);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
  color: var(--brand-primary);
}

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

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

/* ---------------- 权威外链与生态资源 ---------------- */
.outbound-links-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-top: 50px;
}

.outbound-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.outbound-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.outbound-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.outbound-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--brand-cyan);
  color: var(--text-main);
  transform: translateY(-2px);
}

/* ---------------- 底部转化大横幅 (Bottom Hero CTA) ---------------- */
.cta-banner {
  margin: 60px 0;
  background: linear-gradient(135deg, rgba(255, 0, 85, 0.15) 0%, rgba(255, 85, 0, 0.15) 50%, rgba(0, 229, 255, 0.1) 100%);
  border: 1px solid rgba(255, 85, 0, 0.35);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 30px auto;
}

/* ---------------- 页脚 (Footer) ---------------- */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: #04060c;
  padding: 60px 0 30px 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 14px;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
}

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

.footer-col ul li a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
}

.footer-disclaimer {
  max-width: 750px;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ---------------- 响应式适配 (Responsive Media Queries) ---------------- */
@media (max-width: 1200px) {
  /* 价格卡片在较窄屏下依然同排或2x2 */
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .features-grid, .reviews-grid, .articles-preview-grid, .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(6, 8, 19, 0.98);
    backdrop-filter: blur(16px);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  .nav-menu.show {
    display: flex;
  }
  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    padding: 6px 12px;
  }
  .hero {
    padding: 60px 0 40px 0;
  }
  .hero-title {
    font-size: 1.85rem;
    line-height: 1.3;
  }
  .hero-title-sub {
    white-space: normal;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .reviews-grid, .articles-preview-grid, .nodes-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .cta-banner {
    padding: 40px 20px;
  }
  .cta-banner h2 {
    font-size: 1.8rem;
  }
}