/* ==========================================================================
   肥猫云 (FatCat Cloud) - 琥珀暖金 (Amber Warm Gold) 极速推广落地页样式库
   零外部依赖 · 纯原生 CSS3 · 极速秒开 · 移动端优先响应式
   ========================================================================== */

:root {
  /* 基础底色与深色基调 */
  --bg-primary: #0b0907;
  --bg-surface: #14110d;
  --bg-card: rgba(23, 19, 14, 0.75);
  --bg-card-hover: rgba(35, 28, 20, 0.9);
  --bg-card-border: rgba(245, 166, 35, 0.2);
  --bg-card-border-glow: rgba(255, 179, 71, 0.55);

  /* 琥珀暖金 (Amber Warm Gold) 调色板 */
  --amber-100: #fff6e5;
  --amber-200: #fedda6;
  --amber-300: #fec066;
  --amber-400: #ffa726;
  --amber-500: #f5a623; /* 主琥珀金 */
  --amber-600: #d98210;
  --amber-700: #ab5e07;
  --amber-800: #783e05;
  --amber-glow: rgba(245, 166, 35, 0.35);
  --amber-subtle: rgba(245, 166, 35, 0.12);

  /* 文字颜色 */
  --text-main: #fbf8f2;
  --text-secondary: #c9bea9;
  --text-muted: #8a7e6b;

  /* 渐变特效 */
  --gradient-amber: linear-gradient(135deg, #fff2cc 0%, #ffa726 45%, #d98210 100%);
  --gradient-amber-btn: linear-gradient(135deg, #ffb347 0%, #f5a623 50%, #d47b0a 100%);
  --gradient-amber-hover: linear-gradient(135deg, #ffe29a 0%, #ffb74d 50%, #e68a15 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 24, 18, 0.85) 0%, rgba(18, 14, 10, 0.9) 100%);
  --gradient-badge: linear-gradient(135deg, rgba(245, 166, 35, 0.2), rgba(217, 130, 16, 0.08));

  /* 阴影效果 */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.6), 0 0 1px 1px rgba(245, 166, 35, 0.15);
  --shadow-card-hover: 0 20px 40px -10px rgba(0, 0, 0, 0.8), 0 0 25px rgba(245, 166, 35, 0.25);
  --shadow-amber-glow: 0 0 28px rgba(245, 166, 35, 0.4);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  /* 过渡 */
  --trans-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --trans-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  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;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(245, 166, 35, 0.16), transparent),
    radial-gradient(ellipse 60% 40% at 85% 60%, rgba(217, 130, 16, 0.1), transparent),
    radial-gradient(ellipse 50% 30% at 15% 90%, rgba(245, 166, 35, 0.08), transparent);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

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

ul {
  list-style: none;
}

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   顶部光晕与导航栏
   ========================================================================== */
.bg-glow-top {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 380px;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.22) 0%, rgba(11, 9, 7, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 9, 7, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(245, 166, 35, 0.15);
  transition: var(--trans-fast);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 顶部交互 Logo */
.logo-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  transition: var(--trans-smooth);
}

.logo-btn:hover {
  background: rgba(245, 166, 35, 0.08);
}

.logo-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.25), rgba(217, 130, 16, 0.1));
  border: 1px solid rgba(245, 166, 35, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-400);
  box-shadow: 0 0 16px rgba(245, 166, 35, 0.25);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo-btn:hover .logo-icon-wrap {
  transform: rotate(18deg) scale(1.08);
  box-shadow: 0 0 22px rgba(245, 166, 35, 0.45);
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--gradient-amber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--amber-400);
  opacity: 0.85;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--trans-fast);
  padding: 6px 8px;
  border-radius: 6px;
}

.nav-link:hover {
  color: var(--amber-200);
  background: rgba(245, 166, 35, 0.08);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: var(--gradient-amber-btn);
  color: #1e1302;
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 18px rgba(245, 166, 35, 0.35);
  transition: var(--trans-smooth);
}

.nav-cta:hover {
  background: var(--gradient-amber-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245, 166, 35, 0.55);
}

/* ==========================================================================
   按钮通用规范
   ========================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 36px;
  background: var(--gradient-amber-btn);
  color: #1a0f00;
  font-weight: 750;
  font-size: 1.05rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 30px rgba(245, 166, 35, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: var(--trans-smooth);
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--gradient-amber-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 38px rgba(245, 166, 35, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  background: rgba(245, 166, 35, 0.08);
  color: var(--amber-200);
  font-weight: 650;
  font-size: 1.02rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 166, 35, 0.3);
  backdrop-filter: blur(8px);
  transition: var(--trans-smooth);
}

.btn-secondary:hover {
  background: rgba(245, 166, 35, 0.16);
  border-color: var(--amber-400);
  color: #fff;
  transform: translateY(-3px);
}

.btn-recommend {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.18) 0%, rgba(217, 130, 16, 0.3) 100%);
  color: #fff2cc;
  font-weight: 750;
  font-size: 1.02rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--amber-400);
  box-shadow: 0 4px 20px rgba(245, 166, 35, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  transition: var(--trans-smooth);
  cursor: pointer;
}

.btn-recommend:hover {
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.3) 0%, rgba(217, 130, 16, 0.48) 100%);
  border-color: #ffd166;
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(245, 166, 35, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* ==========================================================================
   Hero 主视觉区 (左右分布双栏布局 + 动态实时监控卡片)
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--gradient-badge);
  border: 1px solid rgba(245, 166, 35, 0.35);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--amber-300);
  margin-bottom: 22px;
  box-shadow: 0 0 16px rgba(245, 166, 35, 0.15);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #00e676;
  border-radius: 50%;
  box-shadow: 0 0 8px #00e676;
  animation: pulseAnim 2s infinite ease-in-out;
}

@keyframes pulseAnim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-headline {
  font-size: clamp(2.2rem, 4.2vw, 3.8rem);
  font-weight: 850;
  line-height: 1.18;
  letter-spacing: -1.2px;
  margin-bottom: 22px;
}

.text-amber-glow {
  background: var(--gradient-amber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  text-shadow: 0 0 40px rgba(245, 166, 35, 0.35);
}

.hero-subhead {
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  color: var(--text-secondary);
  margin-bottom: 34px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 18px 24px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.metric-item {
  text-align: center;
}

.metric-val {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--amber-300);
  font-feature-settings: "tnum";
}

.metric-lbl {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* 右侧动态监控仪表盘图卡 */
.hero-right {
  position: relative;
}

.hero-dynamic-card {
  background: linear-gradient(160deg, rgba(32, 26, 18, 0.88) 0%, rgba(16, 13, 9, 0.94) 100%);
  border: 1px solid rgba(245, 166, 35, 0.32);
  border-radius: var(--radius-xl);
  padding: 28px 26px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 30px rgba(245, 166, 35, 0.2);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero-dynamic-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(245, 166, 35, 0.15);
}

.dash-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dash-title-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(245, 166, 35, 0.2);
  border: 1px solid rgba(245, 166, 35, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-300);
}

.dash-title-text {
  font-size: 0.98rem;
  font-weight: 750;
  color: var(--amber-100);
}

.dash-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(0, 230, 118, 0.1);
  border: 1px solid rgba(0, 230, 118, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 650;
  color: #00e676;
}

.dash-node-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-bottom: 20px;
}

.dash-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(245, 166, 35, 0.12);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  transition: var(--trans-fast);
}

.dash-node-item:hover {
  background: rgba(245, 166, 35, 0.08);
  border-color: rgba(245, 166, 35, 0.35);
  transform: translateX(4px);
}

.dash-node-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dash-flag {
  font-size: 1.15rem;
}

.dash-node-name {
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--text-main);
}

.dash-node-type {
  font-size: 0.72rem;
  color: var(--amber-400);
  background: rgba(245, 166, 35, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

.dash-node-stats {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dash-ping-badge {
  font-size: 0.82rem;
  font-weight: 750;
  color: #00e676;
  font-family: monospace;
}

.dash-load-text {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* 实时下行测速与握手协议条 */
.dash-speed-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(245, 166, 35, 0.2);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
}

.dash-speed-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.dash-speed-title {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.dash-speed-value {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--amber-300);
  font-family: monospace;
}

.dash-speed-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
}

.dash-speed-fill {
  width: 88%;
  height: 100%;
  background: var(--gradient-amber);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 10px rgba(245, 166, 35, 0.6);
  animation: speedPulse 3s infinite alternate ease-in-out;
}

@keyframes speedPulse {
  0% { width: 78%; }
  50% { width: 94%; }
  100% { width: 88%; }
}

.dash-protocol-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* 浮动标签挂件 */
.floating-chip-1 {
  position: absolute;
  top: -16px;
  right: -12px;
  background: linear-gradient(135deg, rgba(30, 24, 16, 0.95), rgba(15, 12, 8, 0.95));
  border: 1px solid var(--amber-400);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.78rem;
  font-weight: 750;
  color: var(--amber-200);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5), 0 0 15px rgba(245, 166, 35, 0.3);
  display: flex;
  align-items: center;
  gap: 6px;
  animation: floatChip1 4s ease-in-out infinite alternate;
}

.floating-chip-2 {
  position: absolute;
  bottom: -16px;
  left: -12px;
  background: linear-gradient(135deg, rgba(30, 24, 16, 0.95), rgba(15, 12, 8, 0.95));
  border: 1px solid var(--amber-400);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.78rem;
  font-weight: 750;
  color: var(--amber-200);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5), 0 0 15px rgba(245, 166, 35, 0.3);
  display: flex;
  align-items: center;
  gap: 6px;
  animation: floatChip2 4s ease-in-out infinite alternate;
}

@keyframes floatChip1 {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-8px); }
}

@keyframes floatChip2 {
  0% { transform: translateY(0px); }
  100% { transform: translateY(8px); }
}

/* ==========================================================================
   章节统一定义
   ========================================================================== */
section[data-section] {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 2px;
  color: var(--amber-400);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  line-height: 1.25;
}

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

/* ==========================================================================
   核心优势 3 个图文卡片
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.adv-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  transition: var(--trans-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.adv-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-amber);
  opacity: 0;
  transition: var(--trans-smooth);
}

.adv-card:hover {
  transform: translateY(-8px);
  border-color: var(--bg-card-border-glow);
  box-shadow: var(--shadow-card-hover);
}

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

.adv-icon-box {
  width: 62px;
  height: 62px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.25), rgba(217, 130, 16, 0.08));
  border: 1px solid rgba(245, 166, 35, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-400);
  margin-bottom: 24px;
}

.adv-title {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 14px;
  color: var(--amber-100);
}

.adv-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.adv-highlights {
  list-style: none;
  padding-top: 18px;
  border-top: 1px solid rgba(245, 166, 35, 0.12);
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.adv-highlights li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--amber-200);
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.eco-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 38px 32px;
  box-shadow: var(--shadow-card);
  transition: var(--trans-smooth);
}

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

.eco-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.eco-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(245, 166, 35, 0.18);
  border: 1px solid rgba(245, 166, 35, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-400);
}

.eco-card h3 {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--amber-100);
}

.eco-card p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
  margin-bottom: 26px;
}

.eco-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.eco-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(245, 166, 35, 0.2);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--amber-200);
  transition: var(--trans-fast);
}

.eco-tag:hover {
  background: rgba(245, 166, 35, 0.15);
  border-color: var(--amber-400);
  color: #fff;
}

/* ==========================================================================
   套餐价格对比表
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.plan-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--trans-smooth);
  box-shadow: var(--shadow-card);
}

.plan-card:hover {
  transform: translateY(-8px);
  border-color: var(--bg-card-border-glow);
  box-shadow: var(--shadow-card-hover);
}

.plan-card.featured {
  background: linear-gradient(180deg, rgba(45, 34, 20, 0.95) 0%, rgba(20, 16, 11, 0.95) 100%);
  border: 2px solid var(--amber-400);
  box-shadow: 0 12px 36px rgba(245, 166, 35, 0.28);
  transform: scale(1.03);
}

.plan-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 18px 46px rgba(245, 166, 35, 0.45);
}

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-amber-btn);
  color: #1a0f00;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(245, 166, 35, 0.4);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--amber-100);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(245, 166, 35, 0.15);
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--amber-400);
}

.plan-price {
  font-size: 3rem;
  font-weight: 850;
  color: var(--text-main);
  letter-spacing: -1px;
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  color: var(--amber-400);
  flex-shrink: 0;
}

.plan-btn {
  width: 100%;
  text-align: center;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 750;
  border-radius: var(--radius-pill);
  transition: var(--trans-smooth);
}

.plan-btn-outline {
  background: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.35);
  color: var(--amber-200);
}

.plan-btn-outline:hover {
  background: var(--amber-500);
  color: #1a0f00;
  border-color: var(--amber-500);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 166, 35, 0.35);
}

.plan-btn-featured {
  background: var(--gradient-amber-btn);
  color: #1a0f00;
  box-shadow: 0 6px 24px rgba(245, 166, 35, 0.4);
}

.plan-btn-featured:hover {
  background: var(--gradient-amber-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(245, 166, 35, 0.6);
}

/* ==========================================================================
   SEO 文章专栏图卡模块 (30 篇图卡网格)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: var(--trans-smooth);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--amber-400);
  box-shadow: var(--shadow-card-hover);
}

.article-card-tag {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--amber-400);
  background: rgba(245, 166, 35, 0.12);
  border: 1px solid rgba(245, 166, 35, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.08rem;
  font-weight: 750;
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-card-title a {
  color: var(--text-main);
  transition: var(--trans-fast);
}

.article-card-title a:hover {
  color: var(--amber-300);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(245, 166, 35, 0.12);
  font-size: 0.82rem;
}

.article-card-date {
  color: var(--text-muted);
}

.article-card-link {
  color: var(--amber-300);
  font-weight: 700;
  transition: var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card-link:hover {
  color: #fff;
  transform: translateX(3px);
}

/* ==========================================================================
   用户评价模块
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: var(--trans-smooth);
  display: flex;
  flex-direction: column;
}

.review-card:hover {
  transform: translateY(-5px);
  border-color: var(--bg-card-border-glow);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--amber-400);
  margin-bottom: 16px;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(245, 166, 35, 0.12);
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.3), rgba(217, 130, 16, 0.1));
  border: 1px solid rgba(245, 166, 35, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--amber-300);
  font-size: 0.95rem;
}

.author-info h4 {
  font-size: 0.95rem;
  color: var(--amber-100);
}

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

/* ==========================================================================
   常见问题 FAQ 手风琴
   ========================================================================== */
.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(--bg-card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--trans-fast);
}

.faq-item.active {
  border-color: var(--amber-400);
  background: rgba(30, 24, 18, 0.9);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 22px 26px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 700;
  transition: var(--trans-fast);
}

.faq-question:hover {
  color: var(--amber-200);
}

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--amber-400);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 26px 22px;
}

/* ==========================================================================
   页面底部强转化条与页脚规范
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(42, 32, 20, 0.95) 0%, rgba(20, 16, 10, 0.95) 100%);
  border: 1px solid var(--bg-card-border-glow);
  border-radius: var(--radius-xl);
  padding: 50px 40px;
  text-align: center;
  margin-top: 60px;
  margin-bottom: 60px;
  box-shadow: 0 16px 48px rgba(245, 166, 35, 0.22);
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--amber-100);
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 32px;
}

.footer {
  border-top: 1px solid rgba(245, 166, 35, 0.15);
  background: #090705;
  padding: 48px 0 36px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* 页脚严格只保留四个标题 */
.footer-four-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1rem;
  font-weight: 650;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 4px;
  transition: var(--trans-fast);
}

.footer-nav-link:hover {
  color: var(--amber-300);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

/* 主博客矩阵 PBN 友情链接高权重展示栏 */
.footer-pbn-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 16px 0 10px;
  padding: 10px 24px;
  background: rgba(245, 166, 35, 0.06);
  border: 1px dashed rgba(245, 166, 35, 0.35);
  border-radius: var(--radius-pill);
}

.footer-pbn-title {
  font-size: 0.88rem;
  font-weight: 750;
  color: var(--amber-400);
}

.footer-pbn-link {
  font-size: 0.92rem;
  font-weight: 750;
  color: var(--amber-200);
  transition: var(--trans-fast);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-pbn-link:hover {
  color: #ffffff;
  text-shadow: 0 0 12px rgba(245, 166, 35, 0.55);
}

.footer-pbn-divider {
  color: rgba(245, 166, 35, 0.4);
  font-size: 0.85rem;
}

/* SEO 关键词友链与主站权重矩阵 (PBN 权重聚合) */
.footer-seo-matrix {
  margin-top: 18px;
  padding-top: 20px;
  border-top: 1px solid rgba(245, 166, 35, 0.12);
  width: 100%;
  max-width: 960px;
  text-align: center;
}

.footer-seo-label {
  font-size: 0.78rem;
  font-weight: 750;
  color: var(--amber-400);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.footer-seo-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-seo-link {
  font-size: 0.86rem;
  color: var(--amber-200);
  transition: var(--trans-fast);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(245, 166, 35, 0.22);
  background: rgba(245, 166, 35, 0.05);
}

.footer-seo-link:hover {
  color: #fff;
  border-color: var(--amber-400);
  background: rgba(245, 166, 35, 0.16);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 166, 35, 0.2);
}

/* 信任与安全徽标 */
.footer-trust-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 16px;
}

.trust-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.trust-badge-item svg {
  color: var(--amber-400);
  flex-shrink: 0;
}

.footer-disclaimer {
  font-size: 0.76rem;
  color: var(--text-muted);
  max-width: 820px;
  text-align: center;
  line-height: 1.6;
  margin-top: 14px;
  opacity: 0.8;
}

/* ==========================================================================
   右侧悬浮章节上下导航
   ========================================================================== */
.floating-nav {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: rgba(20, 16, 12, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(245, 166, 35, 0.3);
  border-radius: var(--radius-pill);
  padding: 14px 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 16px rgba(245, 166, 35, 0.2);
}

.nav-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid rgba(245, 166, 35, 0.25);
  color: var(--amber-300);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--trans-smooth);
}

.nav-arrow-btn:hover {
  background: var(--amber-500);
  color: #1a0f00;
  border-color: var(--amber-500);
  transform: scale(1.1);
  box-shadow: 0 0 18px rgba(245, 166, 35, 0.5);
}

.nav-arrow-btn:active {
  transform: scale(0.92);
}

.nav-arrow-btn.disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.nav-section-indicator {
  font-size: 0.75rem;
  font-weight: 750;
  color: var(--amber-400);
  letter-spacing: 0.5px;
  padding: 2px 0;
  user-select: none;
}

/* ==========================================================================
   二级独立子页面专属样式 (关于我们、服务条款、隐私政策、网站地图)
   ========================================================================== */
.subpage-hero {
  padding: 60px 0 36px;
  text-align: center;
}

.subpage-card {
  background: var(--gradient-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 44px 40px;
  margin-bottom: 50px;
  box-shadow: var(--shadow-card);
}

.subpage-content h2 {
  font-size: 1.4rem;
  font-weight: 750;
  color: var(--amber-200);
  margin-top: 32px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(245, 166, 35, 0.15);
}

.subpage-content h2:first-of-type {
  margin-top: 0;
}

.subpage-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.subpage-content ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.subpage-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.subpage-cta-box {
  background: rgba(245, 166, 35, 0.08);
  border: 1px dashed rgba(245, 166, 35, 0.35);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  margin-top: 36px;
}

/* ==========================================================================
   移动端响应式 (@media) 单栏适配
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-left {
    text-align: center;
  }

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

  .advantages-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: 1fr;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
  }

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

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

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .floating-nav {
    right: 8px;
    padding: 8px 4px;
    transform: translateY(-40%);
  }
  .nav-arrow-btn {
    width: 36px;
    height: 36px;
  }

  .hero-headline {
    font-size: 2.1rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-recommend, .btn-secondary {
    width: 100%;
  }

  .floating-chip-1, .floating-chip-2 {
    display: none;
  }

  .footer-four-links {
    gap: 18px;
  }

  .subpage-card {
    padding: 28px 20px;
  }
}