/* ==========================================================================
   赔钱机场 (PQJC) peiqianjichang.best — 视觉样式表
   Design Language: Cyber Emerald Obsidian (#07100e), Neon Cyan & Glassmorphism
   Reference: workspace-33bf5b16-bb62-4867-8b4f-25a9d7d3814d
   ========================================================================== */

:root {
  --bg: #07100e;
  --bg-card: rgba(12, 25, 22, 0.75);
  --bg-card-hover: rgba(18, 36, 32, 0.85);
  --border: rgba(16, 185, 129, 0.16);
  --border-strong: rgba(16, 185, 129, 0.35);

  --emerald: #10B981;
  --emerald-light: #34D399;
  --emerald-dark: #059669;
  --cyan: #06B6D4;
  --cyan-light: #22D3EE;
  --amber: #F59E0B;
  --red: #EF4444;

  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  --r-card: 20px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.25), 0 0 60px rgba(16, 185, 129, 0.1);
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  color: var(--text-main);
  background-color: var(--bg);
  background-image:
    radial-gradient(at 20% 20%, rgba(16, 185, 129, 0.08) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(6, 182, 212, 0.06) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(245, 158, 11, 0.04) 0px, transparent 50%);
  background-attachment: fixed;
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background-color: rgba(16, 185, 129, 0.3);
  color: #ffffff;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}
::-webkit-scrollbar-track {
  background: #07100e;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #10b981, #06b6d4);
  border-radius: 6px;
  border: 2px solid #07100e;
}

img, svg {
  display: block;
}

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

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

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* ============ 背景网格与动画 ============ */
.grid-bg {
  background-image:
    linear-gradient(rgba(16, 185, 129, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 185, 129, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: grid-fade 8s ease-in-out infinite;
}

@keyframes grid-fade {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 0.45; }
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0px) translateX(0px); }
  25% { transform: translateY(-20px) translateX(10px); }
  50% { transform: translateY(-10px) translateX(-15px); }
  75% { transform: translateY(-25px) translateX(5px); }
}

.animate-float {
  animation: float-slow 14s ease-in-out infinite;
}

.text-gradient {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #34d399 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-gold {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.glass-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5), 0 0 24px rgba(16, 185, 129, 0.15);
  transform: translateY(-3px);
}

/* ============ 通用按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14.5px;
  padding: 13px 28px;
  transition: transform .2s, box-shadow .25s, background .2s, border-color .2s;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
  color: #07100e !important;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
  font-weight: 800;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #34D399 0%, #22D3EE 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(16, 185, 129, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: #fff !important;
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  border-color: var(--emerald);
  color: var(--emerald-light) !important;
  background: rgba(16, 185, 129, 0.1);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

/* ============ 顶部导航 ============ */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: background .3s, border-color .3s, backdrop-filter .3s, box-shadow .3s;
  background: rgba(7, 16, 14, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.nav.scrolled {
  background: rgba(7, 16, 14, 0.98);
  border-bottom-color: rgba(16, 185, 129, 0.25);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.55);
}

.nav-in {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .5px;
  color: #fff;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #0C1916;
  border: 1.5px solid rgba(16, 185, 129, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI Black", "Arial Black", Impact, sans-serif;
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -1.5px;
  background-image: linear-gradient(135deg, #34D399 0%, #06B6D4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  flex: none;
}

.logo small {
  display: block;
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 2.5px;
  color: var(--emerald-light);
  line-height: 1;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: #cbd5e1;
  transition: color .2s;
  position: relative;
}

.nav-links a:hover {
  color: var(--emerald-light);
}

.nav-burger {
  display: none;
  margin-left: auto;
  padding: 8px;
}

.nav-drawer {
  display: none;
}

/* ============ Hero 英雄区 ============ */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 120px 0 70px;
  overflow: hidden;
}

/* 全屏粒子 Canvas 背景 */
.particle-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

/* 背景光斑 */
.blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(80px);
  z-index: 0;
}
.blob-1 {
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.16) 0%, transparent 70%);
  top: -100px;
  left: 15%;
}
.blob-2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.14) 0%, transparent 70%);
  bottom: 0;
  right: 10%;
}

.hero-in {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--emerald-light);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-badge .ping-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
}
.hero-badge .ping-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--emerald);
  opacity: 0.6;
  animation: ping 1.8s infinite cubic-bezier(0, 0, 0.2, 1);
}

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -.5px;
  margin-bottom: 22px;
  color: #fff;
}

.hero-word-rotator {
  display: inline-block;
  min-width: 140px;
  text-align: left;
}

.hero p.lead {
  font-size: 17px;
  color: #94A3B8;
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 34px;
}

.hero p.lead strong {
  color: #fff;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 34px;
  flex-wrap: wrap;
}

.hero-features-bar {
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: 13px;
  color: #64748B;
  flex-wrap: wrap;
}

.hero-features-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #cbd5e1;
}

.hero-features-bar svg {
  width: 15px;
  height: 15px;
  stroke: var(--emerald);
}

/* ============ 数据统计横带 ============ */
.stats-strip {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(7, 16, 14, 0.6);
  backdrop-filter: blur(10px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-num {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-num em {
  font-size: 18px;
  font-style: normal;
  color: var(--emerald);
  margin-left: 2px;
}

.stat-title {
  font-size: 14px;
  font-weight: 700;
  color: #e2e8f0;
}

.stat-desc {
  font-size: 11.5px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* ============ 通用分节 ============ */
.sec {
  padding: 90px 0;
  position: relative;
}

.sec-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 54px;
}

.sec-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--emerald-light);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.sec-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 14px;
  color: #fff;
}

.sec-head p {
  color: var(--text-muted);
  font-size: 16px;
}

/* ============ 核心优势 6大卡片 ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
}

.feat-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feat-icon-wrap svg {
  width: 24px;
  height: 24px;
  stroke: var(--emerald-light);
}

.feature-box h3 {
  font-size: 18.5px;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.feature-box p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ============ 全球节点交互地图 ============ */
.map-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: rgba(12, 25, 22, 0.4);
  backdrop-filter: blur(12px);
  padding: 30px 20px 20px;
  box-shadow: var(--shadow-card);
}

.map-svg {
  width: 100%;
  height: auto;
  aspect-ratio: 2.5 / 1;
}

.map-hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding: 12px 20px;
  background: rgba(7, 16, 14, 0.8);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 13px;
}

.hud-legend {
  display: flex;
  gap: 16px;
}

.hud-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.dot-green { width: 8px; height: 8px; border-radius: 50%; background: var(--emerald); }
.dot-amber { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }
.dot-red   { width: 8px; height: 8px; border-radius: 50%; background: var(--red); }

/* ============ 套餐矩阵 (可乐系列) ============ */
.cycle-toggle {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  margin: 0 auto 46px;
  position: relative;
}

.cycle-toggle button {
  position: relative;
  z-index: 2;
  padding: 8px 24px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 999px;
  transition: color .2s;
  color: var(--text-muted);
}

.cycle-toggle button.active {
  color: #07100e;
}

.cycle-glider {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  border-radius: 999px;
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
  transition: transform .3s cubic-bezier(0.2, 0.8, 0.2, 1), width .25s;
  z-index: 1;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.plan-card {
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.plan-card.hot {
  border-color: var(--emerald);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, rgba(12, 25, 22, 0.85) 40%);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(16, 185, 129, 0.25);
  transform: scale(1.02);
  z-index: 2;
}

.hot-pill {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
  color: #07100e;
  font-size: 11.5px;
  font-weight: 900;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-name {
  font-size: 21px;
  font-weight: 900;
  margin-bottom: 6px;
  color: #fff;
}

.plan-desc {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 22px;
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin-bottom: 20px;
}

.plan-price-row .cur {
  font-size: 22px;
  font-weight: 800;
  color: var(--emerald-light);
}

.plan-price-row .val {
  font-size: 42px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.plan-price-row .unit {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-quota-badge {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 22px;
  display: flex;
  justify-content: space-between;
}

.plan-checklist {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-checklist li {
  font-size: 13.5px;
  color: #cbd5e1;
  margin-bottom: 11px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-checklist li svg {
  width: 15px;
  height: 15px;
  stroke: var(--emerald-light);
  flex: none;
}

/* 不限时按量包 */
.permanent-card {
  margin-top: 32px;
  padding: 28px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.perm-info h4 {
  font-size: 18.5px;
  font-weight: 800;
  margin-bottom: 6px;
  color: #fff;
}

.perm-info p {
  font-size: 14px;
  color: var(--text-muted);
}

.perm-cta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: none;
}

.perm-price {
  font-size: 24px;
  font-weight: 900;
  color: var(--emerald-light);
}

/* 官方优惠券横幅 */
.coupon-banner {
  margin-top: 24px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px dashed rgba(16, 185, 129, 0.4);
  border-radius: var(--r-card);
  padding: 26px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.coupon-banner h4 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 4px;
  color: #fff;
}

.coupon-banner p {
  font-size: 13.5px;
  color: var(--text-muted);
}

.coupon-box {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.code-pill {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  color: var(--emerald-light);
  font-family: monospace;
  font-size: 16px;
  font-weight: 800;
  padding: 8px 16px;
  border-radius: 8px;
}

/* ============ 使用步骤与开关模拟 ============ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  padding: 32px 26px;
}

.step-idx {
  font-size: 12px;
  font-weight: 800;
  color: var(--emerald-light);
  background: rgba(16, 185, 129, 0.12);
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* 交互连接开关模拟 */
.toggle-panel {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toggle-desc span {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: #fff;
}

.toggle-desc small {
  font-size: 11.5px;
  color: var(--text-dim);
}

.switch-control {
  width: 50px;
  height: 28px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  position: relative;
  transition: background .3s;
  cursor: pointer;
}

.switch-control::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  transition: transform .3s;
}

.switch-control.on {
  background: var(--emerald);
}

.switch-control.on::after {
  transform: translateX(22px);
}

/* ============ 知识指南专区 ============ */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.guide-box {
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.guide-meta {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.guide-meta b {
  color: var(--emerald-light);
}

.guide-box h3 {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 12px;
  color: #fff;
}

.guide-box p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.guide-link {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--emerald-light);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ============ 用户口碑无缝跑道 ============ */
.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  margin-top: 14px;
}

.marquee-rail {
  display: flex;
  gap: 16px;
  width: max-content;
  animation: scroll-left 36s linear infinite;
  padding: 10px 0;
}

.marquee-rail.reverse {
  animation: scroll-right 40s linear infinite;
}

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

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

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

.rev-card {
  width: 300px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  flex: none;
}

.rev-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.rev-user {
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.rev-stars {
  color: var(--amber);
  font-size: 12px;
}

.rev-body {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============ FAQ 手风琴 ============ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .2s;
}

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

.faq-q {
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  color: #fff;
}

.faq-icon {
  font-size: 20px;
  color: var(--emerald);
  transition: transform .25s;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease-out, padding .3s;
  padding: 0 24px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
}

.faq-item.open .faq-a {
  max-height: 200px;
  padding-bottom: 20px;
}

/* ============ 底部横幅与页脚 ============ */
.pre-foot-cta {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.14) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.pre-foot-cta h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 900;
  margin-bottom: 14px;
  color: #fff;
}

.pre-foot-cta p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 28px;
}

.footer {
  border-top: 1px solid var(--border);
  background: rgba(7, 16, 14, 0.8);
  padding: 60px 0 30px;
  font-size: 14px;
  color: var(--text-muted);
}

.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.foot-brand p {
  margin: 14px 0;
  font-size: 13.5px;
  line-height: 1.7;
  max-width: 320px;
}

.foot-links h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.foot-links a {
  display: block;
  margin-bottom: 10px;
  color: var(--text-muted);
  transition: color .2s;
}

.foot-links a:hover {
  color: var(--emerald-light);
}

.foot-bot {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ Toast 提示 ============ */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translate(-50%, 60px);
  z-index: 200;
  background: #0F172A;
  border: 1px solid var(--border);
  color: #fff;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: all .3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* ============ 响应式适配 ============ */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .nav-drawer {
    display: block;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #07100e;
    border-bottom: 1px solid var(--border);
    padding: 16px 28px 24px;
    transform: translateY(-110%);
    transition: transform .35s;
    z-index: 99;
  }
  .nav-drawer.open {
    transform: none;
  }
  .nav-drawer a {
    display: block;
    padding: 12px 0;
    color: #e2e8f0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .plans-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
  .steps-grid { grid-template-columns: 1fr; }
  .guides-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .permanent-card { flex-direction: column; align-items: flex-start; }
  .coupon-banner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
}

/* ============ 子页面通用组件 (Specialized Sub-Pages) ============ */
.page-hero {
  padding: 130px 0 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, transparent 100%);
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--emerald-light);
  transition: color .2s;
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb span {
  opacity: .5;
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
}

.page-hero p.lead {
  font-size: 16.5px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 规格对比表格 (Cyber Dark Comparison Table) */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  margin: 30px 0 50px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.spec-table th, .spec-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-table th {
  background: rgba(16, 185, 129, 0.08);
  color: #fff;
  font-weight: 800;
  font-size: 13.5px;
  letter-spacing: .5px;
  white-space: nowrap;
}

.spec-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

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

/* 标签药丸 */
.badge-pill {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 700;
}
.badge-emerald { background: rgba(16, 185, 129, 0.15); color: var(--emerald-light); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-cyan    { background: rgba(6, 182, 212, 0.15); color: var(--cyan-light); border: 1px solid rgba(6, 182, 212, 0.3); }
.badge-amber   { background: rgba(245, 158, 11, 0.15); color: #FCD34D; border: 1px solid rgba(245, 158, 11, 0.3); }

/* 平台选项卡 (Tab Navigation) */
.tab-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 30px 0 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 700;
  transition: all .2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tab-btn:hover, .tab-btn.active {
  background: var(--emerald);
  color: #07100e !important;
  border-color: var(--emerald);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}

/* 文章容器 (Article Prose) */
.article-body {
  max-width: 820px;
  margin: 0 auto 60px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 40px;
  box-shadow: var(--shadow-card);
}

.article-body h2 {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin: 34px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--emerald-light);
  margin: 26px 0 12px;
}

.article-body p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin: 0 0 20px 24px;
  color: #cbd5e1;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.callout {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--emerald);
  border-radius: 0 12px 12px 0;
  padding: 16px 20px;
  margin: 24px 0;
  color: #e2e8f0;
  font-size: 14px;
}

@media (max-width: 640px) {
  .article-body {
    padding: 24px 18px;
  }
  .spec-table th, .spec-table td {
    padding: 12px 14px;
    font-size: 13px;
  }
  .tab-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
}

@media (max-width: 1150px) and (min-width: 961px) {
  .plans-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}