/* ==========================================================================
   桔子云机场官网落地页 - Frutiger Aero 风格样式表
   Domain: juziyunjic.homes
   Style: Glossy, airy, optimistic, glassmorphism, fluid micro-dynamics
   ========================================================================== */

:root {
  /* Frutiger Aero 核心调色板 */
  --sky-blue-start: #d4f1f9;
  --sky-blue-mid: #a0e0fc;
  --sky-blue-deep: #38bdf8;
  --aero-cyan: #0ea5e9;
  --aero-green-light: #bbf7d0;
  --aero-green: #34d399;
  --aero-green-deep: #10b981;
  
  /* 桔子云品牌点缀色 */
  --orange-primary: #ff6a3d;
  --orange-hover: #ff521a;
  --orange-light: #fff0eb;
  --orange-glow: rgba(255, 106, 61, 0.35);

  /* 玻璃拟态与光泽材质 */
  --glass-bg: rgba(255, 255, 255, 0.68);
  --glass-bg-subtle: rgba(255, 255, 255, 0.45);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-border-subtle: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 16px 38px -10px rgba(56, 189, 248, 0.22), 0 8px 16px -6px rgba(0, 0, 0, 0.06);
  --glass-shadow-hover: 0 24px 48px -12px rgba(14, 165, 233, 0.35), 0 12px 24px -6px rgba(255, 106, 61, 0.18);
  --inset-gloss: inset 0 1px 1px 0 rgba(255, 255, 255, 0.95), inset 0 -1px 2px 0 rgba(0, 0, 0, 0.04);
  
  /* 文字颜色 */
  --text-main: #0c4a6e;
  --text-title: #082f49;
  --text-muted: #475569;
  --text-light: #64748b;
  
  /* 尺寸与圆角 */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container-max: 1240px;
  
  /* 转场动效 */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  color: var(--text-main);
  background: linear-gradient(135deg, #dcf4fc 0%, #c4f1fb 30%, #e2fbe8 70%, #d1f7df 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
  line-height: 1.65;
}

/* 动态背景光晕与 Frutiger Aero 浮动气泡 */
.aero-bg-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.aurora-glow-1 {
  position: absolute;
  top: -15%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.35) 0%, rgba(56, 189, 248, 0) 70%);
  filter: blur(60px);
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.aurora-glow-2 {
  position: absolute;
  top: 40%;
  right: -15%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.32) 0%, rgba(52, 211, 153, 0) 70%);
  filter: blur(70px);
  animation: floatOrb 22s ease-in-out infinite alternate-reverse;
}

.aurora-glow-3 {
  position: absolute;
  bottom: -20%;
  left: 20%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(255, 179, 138, 0.3) 0%, rgba(255, 106, 61, 0) 65%);
  filter: blur(80px);
  animation: floatOrb 15s ease-in-out infinite alternate;
}

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

/* 动态气泡点缀 */
.bubble {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.3) 50%, rgba(56, 189, 248, 0.15) 100%);
  box-shadow: inset -2px -2px 6px rgba(0, 0, 0, 0.05), inset 2px 2px 8px rgba(255, 255, 255, 0.9), 0 8px 20px rgba(56, 189, 248, 0.18);
  backdrop-filter: blur(2px);
  animation: bubbleRise 16s infinite linear;
}

.bubble:nth-child(1) { width: 45px; height: 45px; left: 8%; animation-duration: 14s; animation-delay: 0s; }
.bubble:nth-child(2) { width: 70px; height: 70px; left: 24%; animation-duration: 20s; animation-delay: 2s; }
.bubble:nth-child(3) { width: 35px; height: 35px; left: 45%; animation-duration: 12s; animation-delay: 5s; }
.bubble:nth-child(4) { width: 85px; height: 85px; left: 68%; animation-duration: 24s; animation-delay: 1s; }
.bubble:nth-child(5) { width: 50px; height: 50px; left: 88%; animation-duration: 17s; animation-delay: 4s; }

@keyframes bubbleRise {
  0% { transform: translateY(105vh) scale(0.85) rotate(0deg); opacity: 0; }
  10% { opacity: 0.85; }
  90% { opacity: 0.75; }
  100% { transform: translateY(-15vh) scale(1.15) rotate(180deg); opacity: 0; }
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 顶部导航栏 (Frutiger Aero 玻璃拟态) */
.header-glass {
  position: sticky;
  top: 16px;
  z-index: 100;
  margin-bottom: 24px;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 12px 28px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.nav-container:hover {
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 20px 45px -10px rgba(56, 189, 248, 0.3);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ff8c42 0%, #ff521a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.35rem;
  box-shadow: 0 6px 14px var(--orange-glow), inset 0 2px 2px rgba(255, 255, 255, 0.6);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0));
  border-radius: 12px 12px 0 0;
}

.brand-name {
  display: flex;
  flex-direction: column;
}

.brand-name-main {
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 40%, #ea580c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: 999px;
  position: relative;
}

.nav-links a:hover {
  color: #0284c7;
  background: rgba(255, 255, 255, 0.6);
}

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

.btn-aero-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-aero-primary {
  background: linear-gradient(135deg, #ff6a3d 0%, #ff4b1f 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 20px -4px var(--orange-glow), var(--inset-gloss);
}

.btn-aero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -2px rgba(255, 82, 26, 0.45), var(--inset-gloss);
}

.btn-aero-cyan {
  background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 20px -4px rgba(2, 132, 199, 0.35), var(--inset-gloss);
}

.btn-aero-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -2px rgba(2, 132, 199, 0.48), var(--inset-gloss);
}

.btn-aero-outline {
  background: var(--glass-bg);
  color: var(--text-title) !important;
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04), var(--inset-gloss);
}

.btn-aero-outline:hover {
  background: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.25);
}

/* 移动端汉堡按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-title);
  cursor: pointer;
  padding: 4px;
}

/* Hero Section */
.hero-section {
  padding: 60px 0 50px;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #0284c7;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.15);
  margin-bottom: 24px;
}

.hero-pill-badge .dot {
  width: 8px;
  height: 8px;
  background-color: var(--aero-green-deep);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--aero-green);
  animation: pulseDot 2s infinite;
}

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

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.22;
  color: var(--text-title);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 40%, #ff6a3d 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  max-width: 780px;
  margin: 0 auto 34px;
  color: var(--text-muted);
  line-height: 1.7;
}

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

.hero-cta-group .btn-aero-pill {
  padding: 15px 36px;
  font-size: 1.05rem;
}

/* 核心特性标签胶囊栏 */
.features-pills-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.pill-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.04);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-title);
  transition: var(--transition-fast);
}

.pill-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.2);
}

.pill-card .icon {
  font-size: 1.15rem;
}

/* 官网快速入口公告卡片 */
.entrance-banner {
  margin: 40px 0 60px;
}

.glass-box {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  overflow: hidden;
}

.glass-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #38bdf8 0%, #34d399 50%, #ff6a3d 100%);
}

.entrance-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
}

.entrance-content h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.entrance-content p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.6;
}

.entrance-domains {
  display: flex;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.domain-tag {
  background: rgba(255, 255, 255, 0.85);
  border: 1px dashed #38bdf8;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  color: #0284c7;
  font-family: monospace;
}

/* Section 通用标题 */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: #ff6a3d;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   套餐价格版块（精确还原图2 + Frutiger Aero 光泽卡片美化）
   PLAN 01: 体验套餐 ¥14.80/月
   PLAN 02: 畅享套餐 ¥16.80/月 (推荐选择)
   PLAN 03: 精品套餐 ¥28.80/月
   ========================================================================== */
.pricing-section {
  padding: 40px 0 70px;
}

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

.price-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: 36px 30px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--glass-shadow-hover);
  background: rgba(255, 255, 255, 0.88);
}

/* PLAN 02 推荐高亮卡片（仿图2红框与推荐选择徽章） */
.price-card.featured {
  border: 2px solid #ff4b1f;
  background: rgba(255, 255, 255, 0.82);
  transform: scale(1.03);
}

.price-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.featured-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  background: linear-gradient(135deg, #ff6a3d 0%, #ff4b1f 100%);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 6px;
  box-shadow: 0 4px 10px rgba(255, 75, 31, 0.3);
}

.plan-label {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #8c8c8c;
  margin-bottom: 8px;
}

.plan-name {
  font-size: 1.85rem;
  font-weight: 800;
  color: #1e1e1e;
  margin-bottom: 10px;
}

.plan-desc {
  font-size: 0.92rem;
  color: #555555;
  min-height: 48px;
  margin-bottom: 24px;
  line-height: 1.5;
}

.plan-divider {
  height: 1px;
  background: rgba(0, 0, 0, 0.06);
  margin-bottom: 24px;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #2b2b2b;
  font-weight: 500;
}

.plan-feature-item .check-icon {
  color: #10b981;
  font-size: 1.1rem;
  font-weight: 900;
}

.plan-price-wrapper {
  margin-top: auto;
  margin-bottom: 24px;
}

.plan-price {
  font-size: 2.35rem;
  font-weight: 900;
  color: #1f1f1f;
  display: flex;
  align-items: baseline;
  letter-spacing: -0.03em;
}

.plan-currency {
  font-size: 1.35rem;
  margin-right: 2px;
}

.plan-unit {
  font-size: 0.92rem;
  font-weight: 500;
  color: #777777;
  margin-left: 6px;
}

.price-card .btn-plan-action {
  width: 100%;
  padding: 13px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.02rem;
  color: #ff4b1f;
  background: #ffffff;
  border: 1px solid rgba(255, 75, 31, 0.3);
  box-shadow: 0 4px 12px rgba(255, 75, 31, 0.08);
  transition: var(--transition-smooth);
}

.price-card:hover .btn-plan-action,
.price-card.featured .btn-plan-action {
  background: linear-gradient(135deg, #ff6a3d 0%, #ff4b1f 100%);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(255, 75, 31, 0.3);
}

.price-card .btn-plan-action .arrow {
  transition: transform 0.2s ease;
}

.price-card:hover .btn-plan-action .arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   核心优势卡片版块 (IPLC专线、稳定安全、全球加速、全平台)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.feature-box {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-box:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--glass-shadow-hover);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #ffffff;
  box-shadow: 0 8px 16px rgba(2, 132, 199, 0.25), var(--inset-gloss);
}

.feature-icon-green {
  background: linear-gradient(135deg, #34d399 0%, #059669 100%);
  box-shadow: 0 8px 16px rgba(5, 150, 105, 0.25), var(--inset-gloss);
}

.feature-icon-orange {
  background: linear-gradient(135deg, #ff8c42 0%, #ea580c 100%);
  box-shadow: 0 8px 16px rgba(234, 88, 12, 0.25), var(--inset-gloss);
}

.feature-box h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-title);
}

.feature-box p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   使用教程与客户端支持版块
   ========================================================================== */
.tutorial-section {
  padding: 40px 0 70px;
}

.client-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--glass-bg-subtle);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-subtle);
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn.active, .tab-btn:hover {
  background: #ffffff;
  color: #0284c7;
  border-color: #38bdf8;
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.25);
}

.tutorial-step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: var(--glass-shadow);
  position: relative;
  transition: var(--transition-fast);
}

.step-card:hover {
  transform: translateY(-4px);
  background: #ffffff;
}

.step-number {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 16px;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.step-card h5 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   常见故障与问题排查版块
   ========================================================================== */
.troubleshooting-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.trouble-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--glass-shadow);
}

.trouble-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.trouble-icon {
  font-size: 1.4rem;
}

.trouble-header h4 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-title);
}

.trouble-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 12px;
}

.trouble-solution {
  background: rgba(255, 255, 255, 0.65);
  border-left: 3px solid #0284c7;
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
  color: #0369a1;
  font-weight: 500;
}

/* ==========================================================================
   FAQ 手风琴折叠版块
   ========================================================================== */
.faq-section {
  padding: 40px 0 70px;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-fast);
}

.faq-item:hover {
  background: rgba(255, 255, 255, 0.85);
}

.faq-question {
  width: 100%;
  padding: 20px 26px;
  background: transparent;
  border: none;
  outline: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-title);
  cursor: pointer;
}

.faq-icon-arrow {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
  color: #0284c7;
}

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

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

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

/* ==========================================================================
   深度评测与专栏文章导读（9篇大作矩阵）
   ========================================================================== */
.articles-section {
  padding: 50px 0 80px;
}

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

.article-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glass-shadow-hover);
  background: #ffffff;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-badge {
  font-size: 0.75rem;
  font-weight: 800;
  color: #ff6a3d;
  background: var(--orange-light);
  padding: 4px 10px;
  border-radius: 999px;
}

.article-date {
  font-size: 0.8rem;
  color: var(--text-light);
}

.article-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card:hover .article-title {
  color: #0284c7;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.kw-tag {
  font-size: 0.75rem;
  background: rgba(56, 189, 248, 0.12);
  color: #0284c7;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: #0284c7;
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  color: #ff6a3d;
}

/* ==========================================================================
   文章内页专用排版样式 (Article Single Page Layout)
   ========================================================================== */
.article-page-body {
  padding-bottom: 80px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.breadcrumbs a:hover {
  color: #0284c7;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--glass-shadow);
}

.single-article-header {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding-bottom: 28px;
  margin-bottom: 32px;
}

.single-article-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 18px;
}

.single-article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-light);
  flex-wrap: wrap;
}

/* 文章正文排版规范 */
.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-title);
  margin: 38px 0 16px;
  position: relative;
  padding-left: 16px;
}

.article-content h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 5px;
  background: linear-gradient(to bottom, #0284c7, #ff6a3d);
  border-radius: 4px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0c4a6e;
  margin: 28px 0 14px;
}

.article-content p {
  margin-bottom: 20px;
  text-align: justify;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content strong {
  color: #082f49;
}

.article-content blockquote {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid #0284c7;
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  font-style: normal;
  color: #0369a1;
  font-weight: 500;
}

.article-content .highlight-box {
  background: linear-gradient(135deg, rgba(255, 247, 237, 0.9) 0%, rgba(254, 243, 199, 0.7) 100%);
  border: 1px solid rgba(251, 146, 60, 0.3);
  padding: 22px;
  border-radius: var(--radius-md);
  margin: 26px 0;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.8) 0%, rgba(236, 253, 245, 0.8) 100%);
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
  margin: 40px 0;
  box-shadow: 0 10px 25px rgba(56, 189, 248, 0.15);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  margin-top: 0;
  color: var(--text-title);
}

/* 文章内部相互链接网格 */
.related-articles {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.related-articles h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 20px;
}

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

.related-card {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.related-card:hover {
  background: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.2);
}

.related-card a {
  font-weight: 700;
  color: var(--text-title);
  font-size: 0.95rem;
  display: block;
  line-height: 1.45;
}

.related-card a:hover {
  color: #0284c7;
}

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.footer-glass {
  margin-top: 70px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
  padding: 50px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h5 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 18px;
}

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

.footer-col ul a {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-col ul a:hover {
  color: #0284c7;
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .price-card.featured {
    transform: none;
  }
  .price-card.featured:hover {
    transform: translateY(-8px);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tutorial-step-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.35rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .entrance-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .entrance-content h3 {
    justify-content: center;
  }
  .entrance-domains {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .troubleshooting-grid {
    grid-template-columns: 1fr;
  }
  .tutorial-step-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .article-container {
    padding: 24px;
  }
  .single-article-title {
    font-size: 1.8rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
    padding: 20px;
    flex-direction: column;
    gap: 12px;
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-actions {
    display: none;
  }
}