/* ============================================================
   仙路湾机场 - 中国国风东方美学视觉设计系统 (Guofeng Theme)
   色系：墨渊青石、泥金、朱砂赤红、翠玉、祥云微光
   ============================================================ */

@charset "UTF-8";

:root {
  /* 东方传统五行与水墨雅色体系 */
  --bg-dark-0: #070a0f;         /* 墨渊底色 */
  --bg-dark-1: #0d121b;         /* 玄墨 */
  --bg-dark-2: #131a26;         /* 黛青叠嶂 */
  --bg-card: rgba(16, 23, 34, 0.72);      /* 琉璃暗玉 */
  --bg-card-hover: rgba(24, 34, 50, 0.88);
  --bg-card-solid: #151e2c;

  /* 核心点缀色 */
  --c-cinnabar: #e64233;       /* 朱砂点睛 */
  --c-cinnabar-glow: rgba(230, 66, 51, 0.45);
  --c-cinnabar-dark: #b82d20;

  --c-gold: #d4af37;           /* 泥金流光 */
  --c-gold-light: #f5df88;     /* 描金亮采 */
  --c-gold-glow: rgba(212, 175, 55, 0.35);
  --c-gold-dim: rgba(212, 175, 55, 0.15);

  --c-jade: #10b981;           /* 翠玉生辉 (低延迟/在线状态) */
  --c-jade-glow: rgba(16, 185, 129, 0.4);
  --c-cyan: #06b6d4;           /* 苍碧晴空 */
  --c-amber: #f59e0b;          /* 琥珀 (中度延迟) */

  /* 文字体系 */
  --t-white: #f8fafc;
  --t-pearl: #e2e8f0;          /* 蚌珠白 */
  --t-silk: #cbd5e1;           /* 素绢素灰 */
  --t-muted: #8b9bb4;          /* 远山淡墨 */

  /* 边框与阴影 */
  --border-delicate: rgba(212, 175, 55, 0.2);
  --border-active: rgba(212, 175, 55, 0.55);
  --border-cinnabar: rgba(230, 66, 51, 0.4);
  --shadow-gold: 0 8px 32px -4px rgba(212, 175, 55, 0.18);
  --shadow-card: 0 12px 40px -8px rgba(0, 0, 0, 0.6);
  --shadow-cinnabar: 0 10px 30px -4px rgba(230, 66, 51, 0.35);

  /* 字体家族 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", "STSong", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", Consolas, "Fira Code", Monaco, monospace;

  /* 尺寸与圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --max-w: 1280px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark-0);
  color: var(--t-pearl);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.65;
  background-color: var(--bg-dark-0);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 动态水墨星云画卷容器 */
#guofeng-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

/* 整体页面内容层级 */
.main-content {
  position: relative;
  z-index: 1;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* 链接与排版规范 */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  letter-spacing: 0.04em;
  font-weight: 700;
}

/* 渐变金色文字 */
.text-gold-gradient {
  background: linear-gradient(135deg, #fff2bc 0%, #d4af37 50%, #f7d268 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 朱砂霞光文字 */
.text-cinnabar-gradient {
  background: linear-gradient(135deg, #ff7a6b 0%, #e64233 60%, #ff8a7d 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 国风印章徽标 (Seal Stamp) */
.seal-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border: 1.5px solid var(--c-cinnabar);
  color: var(--c-cinnabar);
  font-family: var(--font-serif);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
  background: rgba(230, 66, 51, 0.08);
  box-shadow: inset 0 0 8px rgba(230, 66, 51, 0.15), 0 0 10px rgba(230, 66, 51, 0.1);
  letter-spacing: 0.15em;
  user-select: none;
  position: relative;
}

.seal-stamp::before {
  content: "「";
  position: absolute;
  left: -4px;
  top: -6px;
  font-size: 0.7rem;
  opacity: 0.6;
}

.seal-stamp::after {
  content: "」";
  position: absolute;
  right: -4px;
  bottom: -6px;
  font-size: 0.7rem;
  opacity: 0.6;
}

/* 顶部全景广告通知条 (Top Announcement Bar) */
.top-notice-bar {
  background: linear-gradient(90deg, #180908 0%, #2f120e 30%, #3d1712 50%, #2f120e 70%, #180908 100%);
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  padding: 10px 0;
  font-size: 0.875rem;
  position: relative;
  z-index: 50;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.top-notice-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.notice-content {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffddd7;
}

.notice-tag {
  background: var(--c-cinnabar);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 700;
  letter-spacing: 0.05em;
  animation: pulseLight 2s infinite ease-in-out;
}

@keyframes pulseLight {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(0.97); }
}

.notice-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-gold-light);
  font-size: 0.82rem;
  font-weight: 600;
  border-bottom: 1px dashed var(--c-gold);
  padding-bottom: 2px;
}
.notice-btn:hover {
  color: #fff;
  border-bottom-style: solid;
}

/* 顶部导航栏 (Navbar) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-delicate);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  background: rgba(8, 11, 16, 0.95);
  border-bottom-color: var(--border-active);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
}

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

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

.logo-symbol {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1b2638 0%, #101622 100%);
  border: 1px solid var(--c-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--c-gold-dim);
  position: relative;
  overflow: hidden;
}

.logo-symbol svg {
  width: 26px;
  height: 26px;
  fill: var(--c-gold-light);
}

.brand-text h1 {
  font-size: 1.35rem;
  color: var(--t-white);
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-text .sub-tag {
  font-size: 0.72rem;
  color: var(--c-gold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.92rem;
  color: var(--t-silk);
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
  font-weight: 500;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--c-gold-light);
  background: rgba(212, 175, 55, 0.08);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--c-gold);
  transform: translateX(-50%);
  transition: width 0.25s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 60%;
}

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

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #e64233 0%, #c92c1e 100%);
  color: #fff;
  border-color: rgba(255, 140, 128, 0.3);
  box-shadow: var(--shadow-cinnabar);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #f05244 0%, #d83425 100%);
  box-shadow: 0 12px 36px rgba(230, 66, 51, 0.5);
  transform: translateY(-2px);
  color: #fff;
}

.btn-gold {
  background: linear-gradient(135deg, #d4af37 0%, #b88f24 100%);
  color: #111;
  border-color: rgba(255, 235, 150, 0.5);
  font-weight: 700;
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.35);
}

.btn-gold:hover {
  background: linear-gradient(135deg, #e5c148 0%, #c79e2f 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(212, 175, 55, 0.55);
}

.btn-secondary {
  background: rgba(26, 36, 52, 0.6);
  color: var(--t-pearl);
  border-color: var(--border-delicate);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(36, 50, 72, 0.8);
  border-color: var(--c-gold);
  color: var(--c-gold-light);
  transform: translateY(-2px);
}

.btn-outline-gold {
  background: transparent;
  color: var(--c-gold-light);
  border: 1px solid var(--c-gold);
}

.btn-outline-gold:hover {
  background: rgba(212, 175, 55, 0.15);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.25);
  transform: translateY(-2px);
}

.btn-large {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* 汉堡菜单 (移动端) */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--t-pearl);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* 顶部 HERO 区域 */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  text-align: center;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid var(--border-active);
  border-radius: 30px;
  font-size: 0.88rem;
  color: var(--c-gold-light);
  margin-bottom: 28px;
  box-shadow: inset 0 0 16px rgba(212, 175, 55, 0.15);
}

.hero-pill-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-jade);
  box-shadow: 0 0 10px var(--c-jade);
}

.hero-title {
  font-size: 3.4rem;
  line-height: 1.25;
  margin-bottom: 24px;
  font-weight: 800;
  color: #fff;
}

.hero-title .highlight {
  display: block;
  margin-top: 8px;
}

.hero-desc {
  max-width: 840px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--t-silk);
}

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

.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1060px;
  margin: 0 auto;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(212, 175, 55, 0.25), transparent);
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-unit {
  font-size: 1rem;
  color: var(--c-gold);
  margin-left: 2px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--t-muted);
  letter-spacing: 0.05em;
}

/* 板块通用头部 (Section Header) */
.section-wrapper {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 12px;
  font-weight: 600;
}

.section-eyebrow::before, .section-eyebrow::after {
  content: "✦";
  font-size: 0.65rem;
  color: var(--c-gold);
}

.section-title {
  font-size: 2.4rem;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}

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

/* ============================================================
   板块 3: 节点延迟和状态板块 (Live Latency & Status)
   ============================================================ */
.status-dashboard {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-xl);
  padding: 32px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
}

.status-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 28px;
}

.status-filter-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-pill {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--t-silk);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-pill:hover, .filter-pill.active {
  background: rgba(212, 175, 55, 0.15);
  border-color: var(--c-gold);
  color: var(--c-gold-light);
  font-weight: 600;
}

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

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--c-jade);
  font-weight: 600;
  background: rgba(16, 185, 129, 0.1);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.live-badge .pulse-ring {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-jade);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseAnimation 1.8s infinite;
}

@keyframes pulseAnimation {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}

.node-card {
  background: rgba(13, 19, 29, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.node-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-active);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 20px var(--c-gold-dim);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.node-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.node-protocol {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(6, 182, 212, 0.12);
  color: var(--c-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
  font-family: var(--font-mono);
}

.node-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.node-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--t-silk);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.node-tag.tag-vip {
  color: var(--c-gold-light);
  border-color: rgba(212, 175, 55, 0.3);
  background: rgba(212, 175, 55, 0.08);
}

.node-metrics {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
}

.metric-ping {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
}

.ping-good { color: var(--c-jade); }
.ping-medium { color: var(--c-amber); }

.metric-load {
  color: var(--t-muted);
}

.load-bar {
  display: inline-block;
  width: 50px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  vertical-align: middle;
  margin-left: 6px;
}

.load-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-jade), var(--c-cyan));
  border-radius: 3px;
}

/* ============================================================
   板块 4: 套餐价格板块 (15月付、22月付、120年付)
   ============================================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  backdrop-filter: blur(20px);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-active);
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.7), 0 0 25px var(--c-gold-dim);
}

/* 推荐爆款套餐高亮 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(32, 22, 28, 0.85) 0%, rgba(18, 25, 38, 0.9) 100%);
  border: 1.5px solid var(--c-cinnabar);
  box-shadow: 0 20px 50px -10px rgba(230, 66, 51, 0.25), 0 0 30px rgba(230, 66, 51, 0.15);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-8px);
  box-shadow: 0 25px 60px -10px rgba(230, 66, 51, 0.4);
}

.ribbon-banner {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #e64233 0%, #c92c1e 100%);
  color: #fff;
  padding: 4px 18px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  box-shadow: var(--shadow-cinnabar);
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.plan-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}

.plan-symbol {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--c-gold);
  letter-spacing: 0.15em;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--t-muted);
}

.plan-price-wrap {
  margin: 20px 0 10px;
}

.price-currency {
  font-size: 1.3rem;
  color: var(--c-gold-light);
  vertical-align: top;
  margin-right: 2px;
}

.price-val {
  font-family: var(--font-serif);
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

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

.price-discount-hint {
  font-size: 0.8rem;
  color: var(--c-cinnabar);
  font-weight: 600;
  margin-top: 4px;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--t-silk);
  margin-bottom: 14px;
  line-height: 1.5;
}

.feature-check {
  color: var(--c-gold);
  font-size: 1.05rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.plan-feature-item strong {
  color: #fff;
}

/* ============================================================
   板块 4 续: 核心优势板块 (Core Advantages)
   ============================================================ */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.advantage-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.6), 0 0 20px var(--c-gold-dim);
}

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

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

.adv-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(19, 26, 38, 0.6) 100%);
  border: 1px solid rgba(212, 175, 55, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.7rem;
  color: var(--c-gold-light);
  box-shadow: 0 0 16px rgba(212, 175, 55, 0.15);
}

.adv-title {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 12px;
}

.adv-desc {
  font-size: 0.92rem;
  color: var(--t-muted);
  line-height: 1.7;
}

/* ============================================================
   板块 5: 知识库与教程板块 (Tutorials & Articles)
   ============================================================ */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
  position: relative;
}

.article-summary-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.5), 0 0 20px var(--c-gold-dim);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.78rem;
  color: var(--t-muted);
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-gold-light);
  font-weight: 600;
  background: rgba(212, 175, 55, 0.1);
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid rgba(212, 175, 55, 0.2);
}

.article-title {
  font-size: 1.25rem;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.article-summary-card:hover .article-title {
  color: var(--c-gold-light);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--t-silk);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.keyword-badge {
  font-size: 0.75rem;
  color: var(--t-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.article-read-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--c-gold-light);
  font-weight: 600;
  transition: transform 0.2s ease;
}

.article-summary-card:hover .article-read-btn {
  transform: translateX(4px);
  color: #fff;
}

/* ============================================================
   板块 5 续: 常见问题板块 (FAQ Accordion)
   ============================================================ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item.active {
  border-color: var(--c-gold);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--c-gold-light);
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-delicate);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--c-gold);
  flex-shrink: 0;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  border-color: var(--c-cinnabar);
  color: var(--c-cinnabar);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  background: rgba(10, 15, 23, 0.5);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--t-silk);
  padding: 0 26px;
}

.faq-item.active .faq-answer {
  padding: 0 26px 24px;
}

/* ============================================================
   板块 6: 用户评价板块 (Customer Reviews / Testimonials)
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-delicate);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 20px var(--c-gold-dim);
}

.review-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--t-pearl);
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1f2b3e 0%, #0d1522 100%);
  border: 1.5px solid var(--c-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

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

/* ============================================================
   底部行动号召 (Bottom Grand CTA)
   ============================================================ */
.bottom-cta-section {
  padding: 80px 0 100px;
  position: relative;
}

.bottom-cta-box {
  background: linear-gradient(135deg, rgba(35, 20, 22, 0.85) 0%, rgba(18, 25, 38, 0.95) 100%);
  border: 1.5px solid var(--border-active);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7), 0 0 40px var(--c-gold-dim);
}

.bottom-cta-box::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(212, 175, 55, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.bottom-cta-title {
  font-size: 2.6rem;
  color: #fff;
  margin-bottom: 18px;
}

.bottom-cta-desc {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: 1.1rem;
  color: var(--t-silk);
  line-height: 1.8;
}

/* 页脚 (Footer) */
.site-footer {
  border-top: 1px solid var(--border-delicate);
  background: #080b10;
  padding: 50px 0 35px;
  font-size: 0.88rem;
  color: var(--t-muted);
  position: relative;
  z-index: 10;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--t-silk);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--c-gold-light);
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
}

/* ============================================================
   响应式断点 (Responsive Queries)
   ============================================================ */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
  .pricing-card.featured { transform: none; }
  .pricing-card.featured:hover { transform: translateY(-5px); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats-bar { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item:nth-child(2)::after { display: none; }
}

@media (max-width: 768px) {
  .top-notice-inner { justify-content: center; text-align: center; }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 20, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-active);
    display: none;
    box-shadow: 0 15px 30px rgba(0,0,0,0.8);
  }
  .nav-menu.active { display: flex; }
  .mobile-toggle { display: block; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1rem; }
  .section-title { font-size: 1.8rem; }
  .advantages-grid { grid-template-columns: 1fr; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .hero-stats-bar { grid-template-columns: 1fr; }
  .stat-item:not(:last-child)::after { display: none; }
  .status-dashboard { padding: 20px 16px; }
  .nodes-grid { grid-template-columns: 1fr; }
  .bottom-cta-box { padding: 40px 20px; }
  .bottom-cta-title { font-size: 1.8rem; }
}