/* ==========================================================================
   赔钱机场官网 (peiqianjichang.buzz) - 核心样式库
   框架：极光白银 (Aurora Silver) | 模板：莫兰迪科技 (Morandi Tech)
   SEO & CRO 极致优化版
   ========================================================================== */

:root {
  /* 莫兰迪科技色板 (Low-Saturation Morandi Tech Palette) */
  --bg-primary: #0a0e17;
  --bg-secondary: #111726;
  --bg-tertiary: #172033;
  --bg-card: rgba(18, 26, 42, 0.72);
  --bg-card-hover: rgba(26, 36, 58, 0.85);

  /* 极光白银 (Aurora Silver) 金属质感与高光色系 */
  --silver-100: #ffffff;
  --silver-200: #f1f5f9;
  --silver-300: #e2e8f0;
  --silver-400: #cbd5e1;
  --silver-500: #94a3b8;
  --silver-600: #64748b;
  --silver-glow: rgba(226, 232, 240, 0.25);
  --silver-border: rgba(226, 232, 240, 0.12);
  --silver-border-bright: rgba(241, 245, 249, 0.35);

  /* 莫兰迪极光点缀色 (Morandi Aurora Accents) */
  --morandi-cyan: #6ba3b8;        /* 莫兰迪冰青 */
  --morandi-cyan-glow: rgba(107, 163, 184, 0.28);
  --morandi-teal: #689f92;        /* 莫兰迪松绿 (在线/稳定) */
  --morandi-violet: #8c82ab;      /* 莫兰迪幽紫 */
  --morandi-amber: #cfa37e;       /* 莫兰迪暖金 (推荐/爆款) */
  --morandi-rose: #bd7d79;        /* 莫兰迪灰粉 (特惠) */

  /* 文字主辅色 */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* 基础尺寸与过渡 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --container-max: 1240px;
}

/* 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-primary);
  color: var(--text-main);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.65;
  background: radial-gradient(circle at 50% 0%, #152238 0%, #0c121e 40%, var(--bg-primary) 80%);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 极光背景光晕层 */
.aurora-bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.aurora-glow-1 {
  position: absolute;
  top: -150px;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(107, 163, 184, 0.15) 0%, rgba(107, 163, 184, 0) 70%);
  filter: blur(80px);
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.aurora-glow-2 {
  position: absolute;
  top: 250px;
  right: 15%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(140, 130, 171, 0.13) 0%, rgba(140, 130, 171, 0) 70%);
  filter: blur(90px);
  animation: floatOrb 22s ease-in-out infinite alternate-reverse;
}

.aurora-glow-3 {
  position: absolute;
  bottom: 10%;
  left: 10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(104, 159, 146, 0.1) 0%, rgba(104, 159, 146, 0) 70%);
  filter: blur(100px);
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* 极光金属文字 */
.silver-text-gradient {
  background: linear-gradient(135deg, #ffffff 10%, #e2e8f0 45%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.aurora-text-gradient {
  background: linear-gradient(135deg, #e2e8f0 0%, #8ec5d6 45%, #c5bde6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 容器排版 */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 顶部通知横幅 (CRO 强刺激) */
.top-notice-bar {
  background: linear-gradient(90deg, #152238 0%, #1f2f4c 50%, #152238 100%);
  border-bottom: 1px solid var(--silver-border);
  font-size: 0.85rem;
  padding: 8px 16px;
  text-align: center;
  position: relative;
  z-index: 101;
}

.top-notice-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

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

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.top-notice-link {
  color: var(--silver-200);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.top-notice-link:hover {
  color: var(--morandi-cyan);
}

/* 导航栏 */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(11, 15, 25, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--silver-border);
  z-index: 100;
  transition: all var(--transition-normal);
}

.site-header .container {
  max-width: 1380px;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--silver-border-bright);
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--silver-100);
}

.brand-badge {
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--morandi-cyan);
  font-family: var(--font-mono);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
  flex-shrink: 0;
}

.nav-link {
  color: var(--silver-400);
  text-decoration: none;
  font-size: 0.91rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav-link:hover {
  color: var(--silver-100);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--morandi-cyan), var(--silver-200));
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* 按钮规范 (极光白银高光) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: 10px 22px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-silver {
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 60%, #cbd5e1 100%);
  color: #0b111e;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 18px rgba(226, 232, 240, 0.22);
}

.btn-silver:hover {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.35);
  color: #000;
}

.btn-aurora {
  background: linear-gradient(135deg, rgba(107, 163, 184, 0.35) 0%, rgba(140, 130, 171, 0.25) 100%);
  color: var(--silver-100);
  border: 1px solid var(--silver-border-bright);
  backdrop-filter: blur(10px);
}

.btn-aurora:hover {
  background: linear-gradient(135deg, rgba(107, 163, 184, 0.5) 0%, rgba(140, 130, 171, 0.4) 100%);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--morandi-cyan-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--silver-300);
  border: 1px solid var(--silver-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--silver-100);
  border-color: var(--silver-400);
}

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

.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--silver-border-bright);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--silver-300);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-pill .tag-highlight {
  color: var(--morandi-amber);
  font-weight: 700;
}

.hero-title {
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.hero-title-main {
  display: block;
  font-size: clamp(2rem, 4.2vw, 3.5rem);
  line-height: 1.2;
  margin-bottom: 8px;
}

.hero-title-sub {
  display: block;
  font-size: clamp(1.2rem, 2.3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.35;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .hero-title-sub {
    white-space: normal;
    font-size: 1.35rem;
  }
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--silver-400);
  max-width: 860px;
  margin: 0 auto 34px;
  line-height: 1.7;
}

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

/* 核心指标统计 */
.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--silver-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: var(--silver-border-bright);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--silver-100);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--silver-500);
}

/* 通用区块头 */
.section-header {
  text-align: center;
  max-width: 1080px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--morandi-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.45rem, 2.3vw, 2.05rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.35;
  text-wrap: balance;
  word-break: keep-all;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--silver-400);
  line-height: 1.7;
  max-width: 820px;
  margin: 0 auto;
}

.content-section {
  padding: 70px 0;
  position: relative;
}

/* 极光白银磨砂卡片容器 */
.silver-card {
  background: var(--bg-card);
  border: 1px solid var(--silver-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 32px;
  transition: all var(--transition-normal);
}

.silver-card:hover {
  border-color: var(--silver-border-bright);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.45), 0 0 25px rgba(107, 163, 184, 0.08);
}

/* 套餐卡片网格 (Pricing) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.price-card {
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.price-card.featured {
  border-color: rgba(226, 232, 240, 0.4);
  background: linear-gradient(180deg, rgba(27, 39, 64, 0.85) 0%, rgba(18, 26, 42, 0.85) 100%);
  transform: translateY(-8px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), 0 0 30px var(--morandi-cyan-glow);
}

.badge-featured {
  position: absolute;
  top: 14px;
  right: -32px;
  background: linear-gradient(90deg, var(--morandi-cyan), var(--morandi-violet));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 36px;
  transform: rotate(45deg);
  letter-spacing: 0.08em;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

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

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--silver-100);
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--silver-500);
  margin-top: 6px;
}

.price-amount-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: 16px;
}

.currency {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--silver-300);
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--silver-100);
  line-height: 1;
  font-family: var(--font-mono);
}

.price-cycle {
  font-size: 0.88rem;
  color: var(--silver-500);
}

.plan-features {
  list-style: none;
  flex-grow: 1;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--silver-300);
}

.feature-icon-check {
  color: var(--morandi-teal);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-tag-pill {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--silver-200);
}

/* 交互式流量与套餐计算器 (CRO + 高停留时长) */
.calculator-box {
  background: linear-gradient(135deg, rgba(20, 29, 48, 0.85) 0%, rgba(14, 21, 35, 0.9) 100%);
  border: 1px solid var(--silver-border-bright);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-top: 40px;
}

.calc-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  margin-top: 24px;
}

.slider-group {
  margin-bottom: 22px;
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
  color: var(--silver-300);
  margin-bottom: 8px;
}

.slider-val {
  font-weight: 700;
  color: var(--morandi-cyan);
  font-family: var(--font-mono);
}

.range-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #1e293b;
  outline: none;
  -webkit-appearance: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--silver-100);
  cursor: pointer;
  border: 2px solid var(--morandi-cyan);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.calc-result-card {
  background: rgba(11, 17, 28, 0.9);
  border: 1px solid var(--silver-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
}

.calc-result-title {
  font-size: 0.88rem;
  color: var(--silver-500);
}

.calc-rec-name {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--morandi-amber);
  margin: 10px 0 4px;
}

.calc-rec-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--silver-100);
}

/* 核心特性与技术架构网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  padding: 28px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--silver-border);
  transition: all var(--transition-normal);
}

.feature-box:hover {
  transform: translateY(-4px);
  border-color: var(--silver-border-bright);
  background: var(--bg-card-hover);
}

.feature-box-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--silver-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--morandi-cyan);
}

.feature-box-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--silver-100);
  margin-bottom: 10px;
}

.feature-box-desc {
  font-size: 0.92rem;
  color: var(--silver-400);
  line-height: 1.6;
}

/* 实时节点测速面板 (Live Ping Radar) */
.speedtest-container {
  background: var(--bg-card);
  border: 1px solid var(--silver-border-bright);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
}

.speedtest-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(104, 159, 146, 0.15);
  border: 1px solid rgba(104, 159, 146, 0.35);
  color: #a3d9cb;
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 20px;
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.nodes-table th {
  padding: 12px 16px;
  color: var(--silver-500);
  font-weight: 600;
  border-bottom: 1px solid var(--silver-border);
}

.nodes-table td {
  padding: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--silver-300);
}

.node-cell-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--silver-100);
}

.node-flag {
  font-size: 1.2rem;
}

.latency-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
}

.latency-good {
  background: rgba(104, 159, 146, 0.2);
  color: #7ee8c4;
  border: 1px solid rgba(104, 159, 146, 0.4);
}

.latency-mid {
  background: rgba(207, 163, 126, 0.2);
  color: #fed7aa;
  border: 1px solid rgba(207, 163, 126, 0.4);
}

.multiplier-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.07);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--silver-300);
}

.multiplier-discount {
  background: rgba(107, 163, 184, 0.2);
  color: #93d5ed;
  border: 1px solid rgba(107, 163, 184, 0.4);
  font-weight: 700;
}

/* 客户端客户端多平台教程切换 (Tutorial Tabs) */
.tutorial-tabs-wrap {
  margin-top: 30px;
}

.tabs-nav {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--silver-border);
  padding-bottom: 12px;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--silver-500);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--silver-200);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--silver-border-bright);
  color: var(--silver-100);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.tab-content {
  display: none;
  padding: 32px 0 10px;
}

.tab-content.active {
  display: block;
}

.tutorial-step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tutorial-step-card {
  background: rgba(15, 23, 38, 0.6);
  border: 1px solid var(--silver-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.step-num {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--morandi-cyan), var(--morandi-violet));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--silver-100);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--silver-400);
  line-height: 1.6;
}

/* 权威度/防降权客观测评：适合与不适合对比 (E-E-A-T 必备) */
.audit-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.audit-card {
  border-radius: var(--radius-md);
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--silver-border);
}

.audit-card.pros {
  border-top: 3px solid var(--morandi-teal);
}

.audit-card.cons {
  border-top: 3px solid var(--morandi-rose);
}

.audit-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.audit-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.93rem;
  line-height: 1.6;
  color: var(--silver-300);
}

/* FAQ 常见问答手风琴 (Bing Rich Snippet) */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

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

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--silver-100);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--silver-500);
  flex-shrink: 0;
}

.faq-item.open .faq-toggle-icon {
  transform: rotate(180deg);
  color: var(--morandi-cyan);
}

.faq-item.open {
  border-color: var(--silver-border-bright);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
}

.faq-answer-inner {
  padding-bottom: 22px;
  font-size: 0.95rem;
  color: var(--silver-400);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* 官方镜像导航卡片 (防假冒与钓鱼) */
.mirrors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.mirror-card {
  background: var(--bg-card);
  border: 1px solid var(--silver-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mirror-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--silver-100);
}

.mirror-status {
  font-size: 0.78rem;
  color: var(--morandi-teal);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 底部 CTA 强刺激转化条 */
.bottom-cta-banner {
  background: linear-gradient(135deg, #152238 0%, #1c2b48 50%, #152238 100%);
  border: 1px solid var(--silver-border-bright);
  border-radius: var(--radius-lg);
  padding: 50px 32px;
  text-align: center;
  margin: 60px 0 20px;
  position: relative;
  overflow: hidden;
}

.bottom-cta-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.bottom-cta-desc {
  font-size: 1.1rem;
  color: var(--silver-300);
  max-width: 650px;
  margin: 0 auto 30px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--silver-border);
  padding: 60px 0 30px;
  background: #070a12;
  font-size: 0.88rem;
  color: var(--silver-500);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 1fr 1.1fr 1.4fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-geo-desc {
  margin-top: 14px;
  line-height: 1.6;
  color: var(--silver-500);
  font-size: 0.88rem;
}

.feature-box {
  scroll-margin-top: 96px;
}

.card-focus-glow {
  border-color: rgba(107, 163, 184, 0.95) !important;
  box-shadow: 0 0 35px rgba(107, 163, 184, 0.45), 0 14px 40px rgba(0, 0, 0, 0.5) !important;
  transform: translateY(-6px);
  transition: all 0.35s ease;
}

.footer-brand-desc {
  margin-top: 14px;
  line-height: 1.6;
  color: var(--silver-500);
  max-width: 380px;
}

.footer-col-title {
  color: var(--silver-200);
  font-weight: 700;
  margin-bottom: 18px;
  font-size: 0.95rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: var(--silver-500);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--silver-100);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-disclaimer {
  font-size: 0.78rem;
  color: var(--silver-600);
  line-height: 1.5;
  max-width: 800px;
}

/* 浮动操作栏 (移动端专属 Sticky Bar) */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(11, 15, 25, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--silver-border-bright);
  padding: 12px 18px;
  z-index: 999;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.5);
}

.sticky-info {
  display: flex;
  flex-direction: column;
}

.sticky-brand {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--silver-100);
}

.sticky-sub {
  font-size: 0.75rem;
  color: var(--morandi-amber);
}

/* 吐司提示 (Toast Notification) */
.toast-msg {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: rgba(27, 38, 59, 0.95);
  color: var(--silver-100);
  border: 1px solid var(--silver-border-bright);
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.88rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.toast-msg.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 响应式调整 */
@media (max-width: 1280px) {
  .nav-menu {
    gap: 12px;
  }
  .nav-link {
    font-size: 0.86rem;
  }
}

@media (max-width: 1100px) {
  .nav-menu {
    gap: 8px;
  }
  .nav-link {
    font-size: 0.82rem;
  }
}

@media (max-width: 980px) {
  .nav-menu {
    display: none;
  }
}

@media (max-width: 1024px) {
  .hero-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 30px auto 0;
  }
  .price-card.featured {
    transform: none;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .tutorial-step-grid {
    grid-template-columns: 1fr;
  }
  .mirrors-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .audit-compare-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .hero-section {
    padding: 50px 0 40px;
  }
  .mobile-sticky-bar {
    display: flex;
  }
  body {
    padding-bottom: 70px;
  }
  .nodes-table th:nth-child(4),
  .nodes-table td:nth-child(4) {
    display: none;
  }
}