/* ==========================================================================
   锦云 (JinYun) - 新中式数字美学 / 赛博国风 (Cyber Chinoiserie)
   东方意蕴 × 现代极速通信专线 | 纯原生 CSS，零第三方依赖，极致秒开性能
   ========================================================================== */

/* --- 1. CSS 变量与设计规范 (新中式赛博国风调色板) --- */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Serif SC", serif, sans-serif;
  --font-mono: "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;
  
  /* 东方核心色相：玄青墨底、云锦赤金、黛蓝天色、朱砂流霞、翡翠玉色 */
  --bg-primary: #06080e;        /* 玄青墨底 */
  --bg-secondary: #0c101b;      /* 黛墨暗色 */
  --bg-card: rgba(14, 18, 29, 0.82); /* 墨韵微透磨砂 */
  --bg-card-hover: rgba(22, 30, 48, 0.92);
  --bg-glass: rgba(10, 14, 24, 0.78);
  
  /* 品牌核心主色 */
  --gold-primary: #f59e0b;      /* 云锦赤金 */
  --gold-light: #fbbf24;        /* 流光灿金 */
  --gold-glow: rgba(245, 158, 11, 0.35);
  --gold-border: rgba(245, 158, 11, 0.28);
  
  --cyan-accent: #0ea5e9;       /* 霁蓝黛青 */
  --cyan-light: #38bdf8;        /* 碧波天色 */
  --cyan-glow: rgba(14, 165, 233, 0.3);
  
  --cinnabar: #f43f5e;          /* 朱砂红 */
  --cinnabar-glow: rgba(244, 63, 94, 0.35);
  --emerald: #10b981;           /* 翡翠青玉 */
  
  /* 文字层级颜色 */
  --text-main: #f8fafc;         /* 皓雪纯白 */
  --text-muted: #94a3b8;        /* 银灰 */
  --text-dim: #64748b;          /* 黛灰 */
  
  /* 边框与阴影 */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(245, 158, 11, 0.4);
  --border-cyan: rgba(56, 189, 248, 0.35);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.55);
  --shadow-gold: 0 0 35px rgba(245, 158, 11, 0.25);
  --shadow-cyan: 0 0 35px rgba(14, 165, 233, 0.22);
  
  --nav-height: 72px;
  --container-max: 1240px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- 2. 基础重置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  /* 玄青水墨底色 + 赤金与黛青氤氲光晕 */
  background-image: 
    radial-gradient(circle at 18% 18%, rgba(245, 158, 11, 0.10) 0%, transparent 45%),
    radial-gradient(circle at 82% 28%, rgba(14, 165, 233, 0.10) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(244, 63, 94, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 3. 头部导航栏 (Navbar - 严格单排整齐排列) --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(6, 8, 14, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
  transition: all var(--transition-normal);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 28px;
  gap: 20px;
}

/* 品牌 Logo (新中式祥云金石印章) */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 60%, #e11d48 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px var(--gold-glow), inset 0 1px 1px rgba(255, 255, 255, 0.4);
  flex-shrink: 0;
  border: 1px solid rgba(251, 191, 36, 0.4);
}

.brand-name {
  background: linear-gradient(120deg, #ffffff 25%, #fbbf24 75%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 1px;
}

/* 导航链接 (严格单排水平排列，绝不折行) */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 22px;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 4px;
  position: relative;
  white-space: nowrap;
  letter-spacing: 0.3px;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #f59e0b, #0ea5e9);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
  border-radius: 2px;
}

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

/* 移动端专属抽屉按钮（桌面端必须彻底隐藏！） */
.mobile-actions {
  display: none !important;
}

/* 导航右侧转化动作 (单排横向排列，不折行) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

.btn-nav-login {
  color: #e2e8f0;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.05);
  white-space: nowrap;
}

.btn-nav-login:hover {
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.6);
  background: rgba(245, 158, 11, 0.12);
}

.btn-nav-cta {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #0ea5e9 100%);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 15px var(--gold-glow);
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.55);
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 20px;
  padding: 0;
  z-index: 1001;
  flex-shrink: 0;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background: #fbbf24;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* --- 4. 首屏横幅区 (Hero Section - 新中式意境) --- */
.hero-section {
  position: relative;
  padding-top: calc(var(--nav-height) + 70px);
  padding-bottom: 90px;
  text-align: center;
  overflow: hidden;
}

/* 顶部光晕背景装饰 (赤金流霞) */
.hero-glow-sphere {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 480px;
  background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.16) 0%, rgba(14, 165, 233, 0.10) 40%, transparent 70%);
  filter: blur(65px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
}

/* 促销标签 (宫灯金纹礼遇) */
.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(245, 158, 11, 0.14);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 0 22px rgba(245, 158, 11, 0.2);
  animation: pulse-badge 2.5s infinite ease-in-out;
}

.promo-badge-icon {
  font-size: 1.05rem;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

/* 主副标题 */
.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: #ffffff;
}

.hero-title-highlight {
  background: linear-gradient(135deg, #fde047 10%, #f59e0b 50%, #38bdf8 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  text-shadow: 0 0 30px rgba(245, 158, 11, 0.25);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 740px;
  margin: 0 auto 36px;
  font-weight: 400;
}

/* 行动呼吁 (CTA) 按钮组 */
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.btn-primary-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 45%, #0ea5e9 100%);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 15px 42px;
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 28px rgba(245, 158, 11, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-primary-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(245, 158, 11, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

/* 信任指标微型栏 */
.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(245, 158, 11, 0.15);
  max-width: 680px;
  margin: 0 auto;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.trust-number {
  font-size: 1.55rem;
  font-weight: 800;
  color: #fbbf24;
  font-family: var(--font-mono);
}

.trust-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

/* --- 5. 通用区块标题与排版 --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--gold-light);
  margin-bottom: 12px;
  background: rgba(245, 158, 11, 0.12);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

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

/* --- 6. 核心优势图卡区 (Dynamic Cards Section) --- */
.features-section {
  padding: 90px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(245, 158, 11, 0.45);
  box-shadow: var(--shadow-gold);
  background: var(--bg-card-hover);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #f59e0b, transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-card:nth-child(1) .feature-icon-wrapper {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.feature-card:nth-child(2) .feature-icon-wrapper {
  background: rgba(14, 165, 233, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(14, 165, 233, 0.35);
}

.feature-card:nth-child(3) .feature-icon-wrapper {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 流媒体与 AI 支持大图卡 */
.streaming-ai-card {
  background: linear-gradient(135deg, rgba(18, 22, 34, 0.88) 0%, rgba(10, 14, 24, 0.96) 100%);
  border: 1px solid rgba(245, 158, 11, 0.22);
  border-radius: var(--radius-xl);
  padding: 44px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.streaming-ai-card::after {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.14) 0%, transparent 70%);
  pointer-events: none;
}

.streaming-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.streaming-header-left h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.streaming-header-left p {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.streaming-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

/* 标签网格 */
.media-badges-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.media-tag-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition-fast);
}

.media-tag-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-2px);
}

.media-logo-box {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.media-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

.media-info span {
  font-size: 0.75rem;
  color: var(--emerald);
}

/* --- 7. 定价卡片区 (Pricing Section) --- */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(245, 158, 11, 0.35);
  box-shadow: var(--shadow-md);
}

/* VIP2 推荐高亮卡片 (赤金流光双线) */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(32, 28, 42, 0.92) 0%, rgba(16, 20, 32, 0.96) 100%);
  border: 2px solid #f59e0b;
  box-shadow: var(--shadow-gold);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 45px rgba(245, 158, 11, 0.45);
}

.recommend-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #f59e0b, #e11d48);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 20px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.45);
  letter-spacing: 0.8px;
  white-space: nowrap;
}

.pricing-tier-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.pricing-tier-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  min-height: 42px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 12px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fbbf24;
}

.price-amount {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1;
  color: #ffffff;
  font-family: var(--font-mono);
}

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

.pricing-traffic-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 158, 11, 0.3);
  margin-bottom: 28px;
  align-self: flex-start;
}

.featured .pricing-traffic-tag {
  background: rgba(14, 165, 233, 0.15);
  color: #38bdf8;
  border-color: rgba(14, 165, 233, 0.4);
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 14px;
  line-height: 1.5;
}

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

/* 定价卡片底部的 CTA 按钮 */
.btn-pricing-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.98rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(245, 158, 11, 0.25);
  transition: all var(--transition-normal);
}

.btn-pricing-cta:hover {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.5);
  color: #fbbf24;
  transform: translateY(-2px);
}

.featured .btn-pricing-cta {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 45%, #0ea5e9 100%);
  border: none;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}

.featured .btn-pricing-cta:hover {
  background: linear-gradient(135deg, #fbbf24 0%, #b45309 50%, #0284c7 100%);
  box-shadow: 0 10px 26px rgba(245, 158, 11, 0.65);
  transform: translateY(-2px);
}

/* --- 8. 深度特性解析区 (Why Choose Section) --- */
.why-us-section {
  padding: 90px 0;
  position: relative;
}

.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

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

.deep-text-content h3 {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 18px;
}

.deep-text-content p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.deep-highlights-list {
  list-style: none;
}

.deep-highlights-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.96rem;
  color: #e2e8f0;
  margin-bottom: 12px;
}

.deep-highlights-list li svg {
  color: #fbbf24;
  flex-shrink: 0;
}

/* 视觉化动态数据面板 */
.telemetry-dashboard {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: var(--shadow-md);
  position: relative;
  backdrop-filter: blur(14px);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 22px;
}

.dashboard-title-box {
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-indicator {
  width: 10px;
  height: 10px;
  background-color: var(--emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--emerald);
  animation: pulse-dot 1.8s infinite;
}

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

.dashboard-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card-inner {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  display: block;
}

.metric-val.green { color: var(--emerald); }
.metric-val.cyan { color: var(--cyan-light); }
.metric-val.purple { color: #fbbf24; }

.metric-label-small {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 4px;
  display: block;
}

/* 模拟实时吞吐波形条 */
.speed-wave-box {
  background: rgba(0, 0, 0, 0.35);
  border-radius: var(--radius-sm);
  padding: 16px;
  border: 1px solid var(--border-subtle);
}

.wave-title {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.wave-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 55px;
}

.wave-bar {
  flex: 1;
  background: linear-gradient(180deg, #fbbf24, #d97706);
  border-radius: 3px 3px 0 0;
  animation: wave-anim 2s infinite ease-in-out alternate;
}

.wave-bar:nth-child(2n) { animation-duration: 1.6s; animation-delay: 0.2s; background: linear-gradient(180deg, #38bdf8, #0ea5e9); }
.wave-bar:nth-child(3n) { animation-duration: 2.3s; animation-delay: 0.4s; }
.wave-bar:nth-child(4n) { animation-duration: 1.8s; animation-delay: 0.1s; }

@keyframes wave-anim {
  0% { height: 25%; opacity: 0.6; }
  100% { height: 95%; opacity: 1; }
}

/* 终端代码块 Strict_No_Logs_Policy.sh */
.terminal-window {
  background: #080b13;
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.65);
  font-family: var(--font-mono);
}

.terminal-header {
  background: #0f1422;
  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;
  gap: 8px;
}

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

.dot-red { background: #f43f5e; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.terminal-body {
  padding: 22px;
  font-size: 0.85rem;
  line-height: 1.75;
  color: #cbd5e1;
}

.term-comment { color: #64748b; }
.term-prompt { color: #fbbf24; font-weight: 700; }
.term-cmd { color: #f8fafc; font-weight: 600; }
.term-ok { color: var(--emerald); font-weight: 700; }
.term-info { color: #38bdf8; }
.term-warn { color: var(--gold-light); }

.cursor-blink {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: #fbbf24;
  vertical-align: middle;
  animation: cursor-blink 1s infinite step-start;
  margin-left: 4px;
}

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

/* --- 9. 用户评价跑马灯区 (Testimonials Marquee Section) --- */
.testimonials-section {
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 10px 0;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 38s linear infinite;
}

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

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

.testimonial-card {
  width: 360px;
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-gold);
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 0.95rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-quote {
  color: #e2e8f0;
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

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

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
  border: 1px solid rgba(251, 191, 36, 0.4);
}

.author-meta h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
}

.author-meta span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* --- 10. 常见问题解答区 (FAQ Section) --- */
.faq-section {
  padding: 90px 0;
  position: relative;
}

.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(245, 158, 11, 0.35);
}

.faq-item[open] {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(18, 24, 38, 0.92);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.faq-summary {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 26px 24px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
  border-top: 1px solid transparent;
}

.faq-item[open] .faq-answer {
  border-top-color: rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* --- 11. 底部转化区 (CTA Section) --- */
.bottom-cta-section {
  padding: 80px 0 110px;
  position: relative;
}

.bottom-cta-box {
  background: linear-gradient(135deg, rgba(32, 26, 42, 0.9) 0%, rgba(12, 16, 26, 0.95) 50%, rgba(14, 28, 48, 0.9) 100%);
  border: 1px solid rgba(245, 158, 11, 0.38);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(251, 191, 36, 0.25);
  position: relative;
  overflow: hidden;
}

.bottom-cta-box::before {
  content: "";
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.28) 0%, transparent 70%);
  pointer-events: none;
}

.bottom-cta-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.bottom-cta-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.btn-large-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 45%, #0ea5e9 100%);
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 800;
  padding: 16px 52px;
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px rgba(245, 158, 11, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-large-cta:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 42px rgba(245, 158, 11, 0.65);
}

.bottom-guarantee {
  margin-top: 22px;
  font-size: 0.85rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

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

/* --- 12. 页脚 (Footer) --- */
.site-footer {
  border-top: 1px solid rgba(245, 158, 11, 0.15);
  background: #04060a;
  padding: 48px 0 36px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-muted);
  font-size: 0.98rem;
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

.footer-copyright {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* --- 13. 响应式适配媒体查询 (@media) --- */

/* 平板与桌面中屏适配 (<= 1060px) 启用导航折叠抽屉 */
@media (max-width: 1060px) {
  :root {
    --nav-height: 64px;
  }
  
  /* 显示汉堡菜单按钮 */
  .menu-toggle {
    display: flex;
  }
  
  /* 导航菜单转为全宽平滑下拉抽屉 */
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(6, 8, 14, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px 20px;
    gap: 16px;
    border-bottom: 1px solid rgba(245, 158, 11, 0.2);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.7);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    text-align: center;
    padding: 10px 0;
  }
  
  /* 隐藏桌面端右侧按钮 */
  .nav-actions {
    display: none;
  }
  
  /* 在移动抽屉底部展示转化按钮 */
  .nav-menu .mobile-actions {
    display: flex !important;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid rgba(245, 158, 11, 0.2);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
    gap: 36px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .deep-row {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .deep-row:nth-child(2) .terminal-window {
    order: 2;
  }
  
  .media-badges-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 手机屏幕 (<= 768px) */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    padding: 0 8px;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    padding: 0 10px;
  }
  
  .btn-primary-hero {
    width: 100%;
    min-height: 48px;
  }
  
  .hero-trust-bar {
    gap: 20px;
  }
  
  .trust-number {
    font-size: 1.25rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .streaming-ai-card {
    padding: 24px 18px;
  }
  
  .media-badges-grid {
    grid-template-columns: 1fr;
  }
  
  .dashboard-metrics-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .bottom-cta-title {
    font-size: 1.85rem;
  }
  
  .bottom-cta-box {
    padding: 40px 20px;
  }
  
  .btn-large-cta {
    width: 100%;
    min-height: 50px;
    padding: 16px 20px;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }
}

/* --- 14. 子页面通用样式 --- */
.page-hero {
  padding-top: calc(var(--nav-height) + 50px);
  padding-bottom: 40px;
  text-align: center;
  position: relative;
}

.page-hero-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

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

.legal-content-box {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-xl);
  padding: 48px;
  margin-bottom: 80px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
}

.legal-section-block {
  margin-bottom: 36px;
}

.legal-section-block:last-child {
  margin-bottom: 0;
}

.legal-section-block h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.legal-section-block h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, #f59e0b, #0ea5e9);
  border-radius: 2px;
}

.legal-section-block p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 12px;
}

.legal-list {
  list-style: none;
  margin: 14px 0 16px 6px;
}

.legal-list li {
  position: relative;
  padding-left: 22px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
  margin-bottom: 10px;
}

.legal-list li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: #fbbf24;
  font-weight: bold;
}

.highlight-box-warning {
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
}

.highlight-box-warning p {
  color: #fda4af;
  margin: 0;
}

.highlight-box-info {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
}

.highlight-box-info p {
  color: #fde68a;
  margin: 0;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.sitemap-col {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.sitemap-col h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
}

.sitemap-links {
  list-style: none;
}

.sitemap-links li {
  margin-bottom: 12px;
}

.sitemap-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

@media (max-width: 768px) {
  .legal-content-box {
    padding: 26px 20px;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
}

/* --- 15. 深度 SEO 资讯与文章页面专属样式 --- */
.articles-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 80px;
}

.articles-toc-sticky {
  position: sticky;
  top: calc(var(--nav-height) + 20px);
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.18);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  max-height: calc(100vh - var(--nav-height) - 40px);
  overflow-y: auto;
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.toc-item a {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.45;
  display: block;
  transition: all var(--transition-fast);
}

.toc-item a:hover {
  color: #fbbf24;
  padding-left: 4px;
}

.articles-feed {
  display: flex;
  flex-direction: column;
  gap: 50px;
}

.article-card-full {
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.16);
  border-radius: var(--radius-xl);
  padding: 44px 38px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.article-card-full:hover {
  border-color: rgba(245, 158, 11, 0.38);
}

.article-header {
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
}

.article-category-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.article-title-main {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.article-meta-info span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-rich-text h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 28px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-rich-text h3::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 16px;
  background: #fbbf24;
  border-radius: 2px;
}

.article-rich-text h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 18px 0 8px;
}

.article-rich-text p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-rich-text strong {
  color: #ffffff;
}

.article-rich-text ul,
.article-rich-text ol {
  margin: 12px 0 18px 20px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
}

.article-rich-text li {
  margin-bottom: 8px;
}

.article-quote-box {
  background: rgba(245, 158, 11, 0.05);
  border-left: 4px solid #f59e0b;
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-quote-box p {
  margin: 0;
  color: #fde68a;
  font-style: italic;
}

.seo-inlink {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: all var(--transition-fast);
}

.seo-inlink:hover {
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.1);
  padding: 2px 4px;
  border-radius: 4px;
}

.seo-outlink {
  color: #fbbf24;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: all var(--transition-fast);
}

.seo-outlink:hover {
  color: #fef08a;
  background: rgba(245, 158, 11, 0.12);
  padding: 2px 4px;
  border-radius: 4px;
}

.article-table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

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

.article-table th {
  background: rgba(245, 158, 11, 0.1);
  color: #fbbf24;
  padding: 12px 16px;
  font-weight: 700;
  border-bottom: 1px solid rgba(245, 158, 11, 0.2);
}

.article-table td {
  padding: 12px 16px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: rgba(245, 158, 11, 0.03);
}

@media (max-width: 1024px) {
  .articles-layout {
    grid-template-columns: 1fr;
  }
  .articles-toc-sticky {
    position: relative;
    top: 0;
    max-height: none;
    margin-bottom: 30px;
  }
}

@media (max-width: 768px) {
  .article-card-full {
    padding: 26px 20px;
  }
  .article-title-main {
    font-size: 1.4rem;
  }
}