/* ===================================================================
   喵喵网络 (MiaoMiao Network) - 暗夜潜行 · 极简黑金私密风 (Stealth Black & Cyber Gold)
   纯原生 CSS | 极致轻量秒开 | 极简奢华黑金质感 | 完美响应式
   =================================================================== */

:root {
  /* 核心黑金调色板 */
  --bg-primary: #040407;
  --bg-secondary: #090a10;
  --bg-card: rgba(14, 15, 22, 0.82);
  --bg-card-hover: rgba(22, 24, 34, 0.94);
  --bg-glass: rgba(255, 255, 255, 0.02);
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(245, 158, 11, 0.3);
  --border-gold-glow: rgba(251, 191, 36, 0.6);

  --text-main: #f8fafc;
  --text-muted: #9ca3af;
  --text-sub: #6b7280;
  --text-gold: #fde68a;

  /* 金色与高质感点缀 */
  --gold-50: #fffbeb;
  --gold-100: #fef3c7;
  --gold-200: #fde68a;
  --gold-300: #fcd34d;
  --gold-400: #fbbf24;
  --gold-500: #f59e0b;
  --gold-600: #d97706;
  --gold-700: #b45309;

  --accent-emerald: #10b981;
  --accent-cyan: #38bdf8;
  --accent-rose: #f43f5e;

  /* 渐变系列 */
  --gradient-gold: linear-gradient(135deg, #fde68a 0%, #f59e0b 50%, #b45309 100%);
  --gradient-gold-text: linear-gradient(135deg, #ffffff 10%, #fde68a 50%, #f59e0b 100%);
  --gradient-btn: linear-gradient(135deg, #fcd34d 0%, #f59e0b 50%, #d97706 100%);
  --gradient-btn-hover: linear-gradient(135deg, #fffbeb 0%, #fbbf24 50%, #b45309 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.15) 0%, transparent 70%);

  /* 基础尺寸与阴影 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 12px 35px -10px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--border-light);
  --shadow-gold: 0 0 35px rgba(245, 158, 11, 0.28);
  --shadow-gold-lg: 0 15px 45px rgba(217, 119, 6, 0.35);

  --container-max: 1200px;
  --transition: all 0.28s 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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: 
    radial-gradient(ellipse 70% 45% at 50% -15%, rgba(245, 158, 11, 0.14), transparent),
    radial-gradient(circle at 92% 30%, rgba(217, 119, 6, 0.08), transparent 45%),
    radial-gradient(circle at 8% 75%, rgba(251, 191, 36, 0.06), transparent 50%),
    var(--bg-primary);
}

/* 装饰性暗夜金属细密微网格 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===================================================================
   导航栏 (Navbar)
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: rgba(4, 4, 7, 0.65);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(245, 158, 11, 0.08);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(4, 4, 7, 0.94);
  border-bottom: 1px solid rgba(245, 158, 11, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

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

/* 品牌 Logo - 暗夜潜行猫 */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo:hover {
  transform: translateY(-1px);
}

.brand-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, #181924, #0c0d13);
  border: 1px solid rgba(245, 158, 11, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.25);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.brand-icon-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.3), transparent);
  animation: shine 4s infinite linear;
}

.brand-icon-box svg {
  width: 25px;
  height: 25px;
  fill: #fbbf24;
}

.brand-name {
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.brand-badge {
  font-size: 0.65rem;
  padding: 3px 8px;
  border-radius: 9999px;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
  -webkit-text-fill-color: #fbbf24;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  display: inline-block;
  line-height: 1.2;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
  display: inline-block;
}

.nav-link:hover {
  color: #fbbf24;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-gold);
  transition: var(--transition);
  border-radius: 2px;
}

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

/* 移动端操作按钮：桌面端必须完全隐藏 */
.mobile-nav-actions {
  display: none;
}

/* 按钮规范 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
  white-space: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

/* 黑金极简幽灵按钮 */
.btn-ghost {
  color: #e5e7eb;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-ghost:hover {
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-1px);
}

/* 黑金流光主按钮 */
.btn-primary {
  background: var(--gradient-btn);
  color: #040407;
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
  border: 1px solid rgba(253, 230, 138, 0.5);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 26px rgba(245, 158, 11, 0.55);
  transform: translateY(-2px);
  color: #000000;
}

/* 暗夜潜行次级按钮 */
.btn-secondary {
  background: rgba(14, 15, 22, 0.85);
  color: #fde68a;
  border: 1px solid rgba(245, 158, 11, 0.4);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.6);
}

.btn-secondary:hover {
  background: rgba(245, 158, 11, 0.12);
  border-color: #fbbf24;
  color: #ffffff;
  box-shadow: 0 6px 22px rgba(245, 158, 11, 0.25);
  transform: translateY(-2px);
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #ffffff;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #fbbf24;
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===================================================================
   首屏横幅区 (Hero Section)
   =================================================================== */
.hero-section {
  padding-top: 170px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-flex;
  margin-bottom: 24px;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 9999px;
  color: #fde68a;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.2);
  animation: pulse-gold-glow 3.5s infinite ease-in-out;
}

.promo-tag {
  background: linear-gradient(135deg, #f59e0b, #b45309);
  color: #040407;
  font-size: 0.72rem;
  font-weight: 900;
  padding: 3px 9px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-title {
  font-size: clamp(2.3rem, 5.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title .text-gradient {
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 38px;
  font-weight: 400;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* 暗夜金属风格统计看板 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
  padding: 24px;
  background: rgba(14, 15, 22, 0.75);
  border: 1px solid rgba(245, 158, 11, 0.18);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.7);
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

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

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  display: block;
  margin-bottom: 4px;
}

.stat-number.gold { color: #fbbf24; }
.stat-number.cyan { color: #38bdf8; }
.stat-number.emerald { color: #34d399; }
.stat-number.champagne { color: #fde68a; }

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===================================================================
   通用板块标题与样式
   =================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.08);
  padding: 6px 16px;
  border-radius: 9999px;
  border: 1px solid rgba(245, 158, 11, 0.28);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.25;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===================================================================
   核心优势图卡区 (Dynamic Cards Section)
   =================================================================== */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.7), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.7), 0 0 25px rgba(245, 158, 11, 0.18);
}

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

.card-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.card-icon-box svg {
  width: 30px;
  height: 30px;
  fill: #fbbf24;
}

.feature-card:nth-child(2) .card-icon-box {
  background: rgba(251, 191, 36, 0.08);
  border-color: rgba(251, 191, 36, 0.35);
}
.feature-card:nth-child(2) .card-icon-box svg {
  fill: #fde68a;
}

.feature-card:nth-child(3) .card-icon-box {
  background: rgba(217, 119, 6, 0.08);
  border-color: rgba(217, 119, 6, 0.35);
}
.feature-card:nth-child(3) .card-icon-box svg {
  fill: #f59e0b;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(245, 158, 11, 0.05);
  border: 1px solid rgba(245, 158, 11, 0.15);
  color: #fde68a;
}

/* 流媒体与 AI 支持大图卡 */
.media-ai-card {
  background: linear-gradient(135deg, rgba(14, 15, 22, 0.95), rgba(28, 20, 10, 0.55));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-xl);
  padding: 42px 40px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7), 0 0 35px rgba(245, 158, 11, 0.15);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.media-ai-content h3 {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.media-ai-content p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.service-pill-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.service-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(245, 158, 11, 0.15);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: #ffffff;
  font-weight: 600;
  transition: var(--transition);
}

.service-pill:hover {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.45);
  transform: translateY(-2px);
}

.service-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 800;
  flex-shrink: 0;
}

.bg-chatgpt { background: #10a37f; color: #fff; }
.bg-claude { background: #d97706; color: #fff; }
.bg-netflix { background: #e50914; color: #fff; }
.bg-youtube { background: #ff0000; color: #fff; }
.bg-disney { background: #113ccf; color: #fff; }
.bg-midjourney { background: #8b5cf6; color: #fff; }

.media-ai-visual {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
}

.stream-speed-meter {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.meter-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.meter-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
}

.meter-info span:first-child {
  color: #cbd5e1;
}

.meter-info span:last-child {
  color: #fbbf24;
  font-family: monospace;
}

.meter-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 9999px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
  transition: width 1s ease;
}

/* ===================================================================
   定价卡片区 (Pricing Section)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.7), 0 0 30px rgba(245, 158, 11, 0.15);
}

/* 黑金高亮推荐尊享卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(28, 20, 10, 0.9) 0%, rgba(14, 15, 22, 0.95) 100%);
  border: 2px solid #f59e0b;
  box-shadow: 0 20px 50px rgba(217, 119, 6, 0.28), 0 0 30px rgba(245, 158, 11, 0.2);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 28px 60px rgba(217, 119, 6, 0.4);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-btn);
  color: #040407;
  padding: 5px 20px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 18px rgba(245, 158, 11, 0.6);
  white-space: nowrap;
}

.plan-badge {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fbbf24;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.plan-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.plan-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fbbf24;
}

.plan-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -0.03em;
}

.plan-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.plan-traffic-highlight {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #fde68a;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.25);
  padding: 6px 14px;
  border-radius: 9999px;
  margin-bottom: 20px;
  width: fit-content;
}

.plan-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 26px;
  min-height: 48px;
}

.plan-features {
  list-style: none;
  margin-bottom: 34px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: #e2e8f0;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  fill: #fbbf24;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===================================================================
   深度特性解析区 (Why Choose Section)
   =================================================================== */
.deep-feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

.deep-feature-row:last-child {
  margin-bottom: 0;
}

.feature-lead-title {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.25;
  color: #ffffff;
}

.feature-lead-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 26px;
}

.checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.checklist li svg {
  width: 20px;
  height: 20px;
  fill: #fbbf24;
  flex-shrink: 0;
}

/* 暗夜黑金动态监控面板 */
.telemetry-dashboard {
  background: rgba(14, 15, 22, 0.9);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8), 0 0 35px rgba(245, 158, 11, 0.1);
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}

.telemetry-dashboard::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15), transparent 70%);
  pointer-events: none;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
  margin-bottom: 22px;
}

.dashboard-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.live-indicator {
  display: inline-block;
  width: 9px;
  height: 9px;
  background-color: #fbbf24;
  border-radius: 50%;
  box-shadow: 0 0 10px #fbbf24;
  animation: pulse-dot 1.8s infinite;
}

.dashboard-badge {
  font-size: 0.75rem;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 3px 10px;
  border-radius: 9999px;
  font-family: monospace;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 22px;
}

.telemetry-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(245, 158, 11, 0.1);
  border-radius: var(--radius-md);
  padding: 16px;
}

.telemetry-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: block;
}

.telemetry-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  font-family: monospace;
}

.telemetry-val small {
  font-size: 0.8rem;
  color: #9ca3af;
  font-weight: normal;
  margin-left: 4px;
}

.latency-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.latency-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
}

.latency-node {
  width: 95px;
  color: #e2e8f0;
  font-weight: 500;
}

.latency-progress {
  flex-grow: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 9999px;
  overflow: hidden;
}

.latency-bar {
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.latency-ms {
  width: 55px;
  text-align: right;
  color: #fbbf24;
  font-family: monospace;
  font-weight: 700;
}

/* 暗夜极客终端代码块 */
.geek-terminal {
  background: #020204;
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8), 0 0 25px rgba(245, 158, 11, 0.1);
  overflow: hidden;
  font-family: "JetBrains Mono", Consolas, "Courier New", monospace;
  font-size: 0.88rem;
  line-height: 1.6;
}

.terminal-header {
  background: #0b0c12;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 7px;
}

.terminal-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.terminal-dots .dot-red { background: #ef4444; }
.terminal-dots .dot-yellow { background: #f59e0b; }
.terminal-dots .dot-green { background: #10b981; }

.terminal-title {
  color: #fbbf24;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.terminal-badge {
  font-size: 0.7rem;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 2px 8px;
  border-radius: 4px;
}

.terminal-body {
  padding: 22px 24px;
  color: #e5e7eb;
  overflow-x: auto;
}

.terminal-line {
  margin-bottom: 8px;
  white-space: pre-wrap;
  word-break: break-all;
}

.t-prompt { color: #fbbf24; font-weight: 700; }
.t-cmd { color: #ffffff; font-weight: 600; }
.t-comment { color: #6b7280; font-style: italic; }
.t-success { color: #34d399; font-weight: 600; }
.t-cyan { color: #fde68a; }
.t-dim { color: #9ca3af; }
.t-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: #fbbf24;
  margin-left: 4px;
  vertical-align: middle;
  animation: blink 1s infinite;
}

/* ===================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   =================================================================== */
.marquee-section {
  padding: 80px 0;
  overflow: hidden;
  position: relative;
}

.marquee-container {
  display: flex;
  width: 100%;
  overflow: hidden;
  position: relative;
  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: 24px;
  animation: marquee-scroll 35s linear infinite;
  width: max-content;
}

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

.testimonial-card {
  width: 360px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.7), 0 0 20px rgba(245, 158, 11, 0.15);
}

.testimonial-rating {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.testimonial-rating svg {
  width: 16px;
  height: 16px;
  fill: #fbbf24;
}

.testimonial-text {
  font-size: 0.94rem;
  color: #cbd5e1;
  line-height: 1.6;
  margin-bottom: 18px;
  min-height: 68px;
}

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

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #040407;
  border: 1px solid rgba(251, 191, 36, 0.5);
}

.avatar-1 { background: linear-gradient(135deg, #fde68a, #f59e0b); }
.avatar-2 { background: linear-gradient(135deg, #fcd34d, #d97706); }
.avatar-3 { background: linear-gradient(135deg, #fef08a, #ca8a04); }
.avatar-4 { background: linear-gradient(135deg, #fbbf24, #b45309); }
.avatar-5 { background: linear-gradient(135deg, #fde047, #f59e0b); }
.avatar-6 { background: linear-gradient(135deg, #fde68a, #b45309); }

.user-info h4,
.user-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
}

.user-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===================================================================
   常见问题解答区 (FAQ Section)
   =================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(245, 158, 11, 0.3);
}

.faq-item[open] {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(18, 19, 28, 0.9);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(245, 158, 11, 0.1);
}

.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;
  user-select: none;
}

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

.faq-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9ca3af;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: #fbbf24;
}

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ===================================================================
   底部转化区 (CTA Section)
   =================================================================== */
.bottom-cta-section {
  padding: 90px 0;
  position: relative;
}

.cta-box {
  background: radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.28) 0%, rgba(14, 15, 22, 0.96) 80%);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--radius-xl);
  padding: 70px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 50px rgba(245, 158, 11, 0.2);
}

.cta-box::after {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.18), transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  max-width: 680px;
  margin: 0 auto 36px auto;
  line-height: 1.65;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-guarantee {
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.guarantee-item svg {
  width: 16px;
  height: 16px;
  fill: #fbbf24;
}

/* ===================================================================
   页脚 (Footer) - 只保留四个标题，打开新页面展示
   =================================================================== */
.footer {
  padding: 45px 0;
  border-top: 1px solid rgba(245, 158, 11, 0.12);
  background: #020204;
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-link {
  font-size: 0.95rem;
  color: #cbd5e1;
  font-weight: 500;
  transition: var(--transition);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-link:hover {
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.45);
  background: rgba(245, 158, 11, 0.08);
  transform: translateY(-1px);
}

.footer-copyright {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-sub);
}

/* ===================================================================
   独立子页面通用样式 (about, terms, privacy, sitemap)
   =================================================================== */
.subpage-hero {
  padding-top: 140px;
  padding-bottom: 50px;
  text-align: center;
  border-bottom: 1px solid rgba(245, 158, 11, 0.1);
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(245, 158, 11, 0.15), transparent);
}

.subpage-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 14px;
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subpage-hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.subpage-content {
  padding: 60px 0 100px 0;
  max-width: 860px;
  margin: 0 auto;
}

.content-block {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 30px;
}

.content-block h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-block h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--gradient-gold);
  border-radius: 2px;
}

.content-block p {
  color: #cbd5e1;
  font-size: 0.96rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.content-block ul {
  padding-left: 20px;
  color: #cbd5e1;
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.75;
}

.content-block ul li {
  margin-bottom: 8px;
}

/* 网站地图样式 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-group {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.sitemap-group h3 {
  font-size: 1.2rem;
  color: #fbbf24;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sitemap-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-list a {
  color: #9ca3af;
  font-size: 0.94rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.sitemap-list a:hover {
  color: #fbbf24;
  transform: translateX(4px);
}

/* ===================================================================
   关键动画定义
   =================================================================== */
@keyframes pulse-gold-glow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.35);
  }
  50% {
    box-shadow: 0 0 28px rgba(251, 191, 36, 0.45);
    border-color: rgba(251, 191, 36, 0.65);
  }
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

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

@keyframes shine {
  0% { left: -100%; }
  20% { left: 100%; }
  100% { left: 100%; }
}

/* ===================================================================
   响应式适配 (Media Queries)
   =================================================================== */
@media (max-width: 1024px) {
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .deep-feature-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .deep-feature-row.reverse {
    display: flex;
    flex-direction: column-reverse;
  }

  .media-ai-card {
    grid-template-columns: 1fr;
    padding: 32px 26px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stat-item:nth-child(2) {
    border-right: none;
  }

  /* 导航栏响应式抽屉 (1024px 及以下收起为汉堡菜单) */
  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(4, 4, 7, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid rgba(245, 158, 11, 0.25);
    display: none;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .mobile-nav-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .mobile-nav-actions .btn {
    width: 100%;
    height: 48px;
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding-top: 130px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .hero-subtitle {
    font-size: 0.98rem;
  }

  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .service-pill-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 50px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
    min-height: 50px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .footer-link {
    width: 100%;
    text-align: center;
  }

  .cta-guarantee {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

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

  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: 14px;
  }

  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

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

  .pricing-card {
    padding: 30px 20px;
  }

  .terminal-body {
    padding: 16px;
    font-size: 0.78rem;
  }
}